Annotation of loncom/lond, revision 1.489.2.43.2.11

1.1       albertel    1: #!/usr/bin/perl
                      2: # The LearningOnline Network
                      3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60      www         4: #
1.489.2.43.2.  1(raebur    5:4): # $Id: lond,v 1.489.2.43.2.10 2023/12/29 20:10:17 raeburn Exp $
1.60      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
1.167     foxr       13: # the Free Software Foundation; either version 2 of the License, or 
1.60      www        14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
1.178     foxr       23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
1.60      www        24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
1.161     foxr       27: 
                     28: 
1.60      www        29: # http://www.lon-capa.org/
                     30: #
1.54      harris41   31: 
1.134     albertel   32: use strict;
1.80      harris41   33: use lib '/home/httpd/lib/perl/';
1.325     albertel   34: use LONCAPA;
1.80      harris41   35: use LONCAPA::Configuration;
1.489.2.4  raeburn    36: use LONCAPA::Lond;
1.80      harris41   37: 
1.1       albertel   38: use IO::Socket;
                     39: use IO::File;
1.126     albertel   40: #use Apache::File;
1.1       albertel   41: use POSIX;
                     42: use Crypt::IDEA;
                     43: use LWP::UserAgent();
1.347     raeburn    44: use Digest::MD5 qw(md5_hex);
1.3       www        45: use GDBM_File;
1.91      albertel   46: use Authen::Krb5;
1.49      albertel   47: use localauth;
1.193     raeburn    48: use localenroll;
1.265     albertel   49: use localstudentphoto;
1.143     foxr       50: use File::Copy;
1.292     albertel   51: use File::Find;
1.200     matthew    52: use LONCAPA::lonlocal;
                     53: use LONCAPA::lonssl;
1.221     albertel   54: use Fcntl qw(:flock);
1.383     raeburn    55: use Apache::lonnet;
1.472     raeburn    56: use Mail::Send;
1.489.2.21  raeburn    57: use Crypt::Eksblowfish::Bcrypt;
                     58: use Digest::SHA;
                     59: use Encode;
1.1       albertel   60: 
1.463     foxr       61: my $DEBUG = 0;		       # Non zero to enable debug log entries.
1.77      foxr       62: 
1.57      www        63: my $status='';
                     64: my $lastlog='';
                     65: 
1.489.2.43.2.  1(raebur   66:4): my $VERSION='$Revision: 1.489.2.43.2.10 $'; #' stupid emacs
1.121     albertel   67: my $remoteVERSION;
1.214     foxr       68: my $currenthostid="default";
1.115     albertel   69: my $currentdomainid;
1.134     albertel   70: 
                     71: my $client;
1.200     matthew    72: my $clientip;			# IP address of client.
                     73: my $clientname;			# LonCAPA name of client.
1.448     raeburn    74: my $clientversion;              # LonCAPA version running on client.
                     75: my $clienthomedom;              # LonCAPA domain of homeID for client. 
                     76:                                 # primary library server. 
1.140     foxr       77: 
1.134     albertel   78: my $server;
1.200     matthew    79: 
                     80: my $keymode;
1.198     foxr       81: 
1.207     foxr       82: my $cipher;			# Cipher key negotiated with client
                     83: my $tmpsnum = 0;		# Id of tmpputs.
                     84: 
1.178     foxr       85: # 
                     86: #   Connection type is:
                     87: #      client                   - All client actions are allowed
                     88: #      manager                  - only management functions allowed.
                     89: #      both                     - Both management and client actions are allowed
                     90: #
1.161     foxr       91: 
1.178     foxr       92: my $ConnectionType;
1.161     foxr       93: 
1.178     foxr       94: my %managers;			# Ip -> manager names
1.161     foxr       95: 
1.178     foxr       96: my %perlvar;			# Will have the apache conf defined perl vars.
1.134     albertel   97: 
1.480     raeburn    98: my $dist;
                     99: 
1.178     foxr      100: #
1.207     foxr      101: #   The hash below is used for command dispatching, and is therefore keyed on the request keyword.
                    102: #    Each element of the hash contains a reference to an array that contains:
                    103: #          A reference to a sub that executes the request corresponding to the keyword.
                    104: #          A flag that is true if the request must be encoded to be acceptable.
                    105: #          A mask with bits as follows:
                    106: #                      CLIENT_OK    - Set when the function is allowed by ordinary clients
                    107: #                      MANAGER_OK   - Set when the function is allowed to manager clients.
                    108: #
                    109: my $CLIENT_OK  = 1;
                    110: my $MANAGER_OK = 2;
                    111: my %Dispatcher;
                    112: 
                    113: 
                    114: #
1.178     foxr      115: #  The array below are password error strings."
                    116: #
                    117: my $lastpwderror    = 13;		# Largest error number from lcpasswd.
                    118: my @passwderrors = ("ok",
1.287     foxr      119: 		   "pwchange_failure - lcpasswd must be run as user 'www'",
                    120: 		   "pwchange_failure - lcpasswd got incorrect number of arguments",
                    121: 		   "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
                    122: 		   "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
                    123: 		   "pwchange_failure - lcpasswd User does not exist.",
                    124: 		   "pwchange_failure - lcpasswd Incorrect current passwd",
                    125: 		   "pwchange_failure - lcpasswd Unable to su to root.",
                    126: 		   "pwchange_failure - lcpasswd Cannot set new passwd.",
                    127: 		   "pwchange_failure - lcpasswd Username has invalid characters",
                    128: 		   "pwchange_failure - lcpasswd Invalid characters in password",
                    129: 		   "pwchange_failure - lcpasswd User already exists", 
                    130:                    "pwchange_failure - lcpasswd Something went wrong with user addition.",
                    131: 		   "pwchange_failure - lcpasswd Password mismatch",
                    132: 		   "pwchange_failure - lcpasswd Error filename is invalid");
1.97      foxr      133: 
                    134: 
1.412     foxr      135: # This array are the errors from lcinstallfile:
                    136: 
                    137: my @installerrors = ("ok",
                    138: 		     "Initial user id of client not that of www",
                    139: 		     "Usage error, not enough command line arguments",
1.489.2.5  raeburn   140: 		     "Source filename does not exist",
                    141: 		     "Destination filename does not exist",
1.412     foxr      142: 		     "Some file operation failed",
                    143: 		     "Invalid table filename."
                    144: 		     );
1.207     foxr      145: 
                    146: #
                    147: #   Statistics that are maintained and dislayed in the status line.
                    148: #
1.212     foxr      149: my $Transactions = 0;		# Number of attempted transactions.
                    150: my $Failures     = 0;		# Number of transcations failed.
1.207     foxr      151: 
                    152: #   ResetStatistics: 
                    153: #      Resets the statistics counters:
                    154: #
                    155: sub ResetStatistics {
                    156:     $Transactions = 0;
                    157:     $Failures     = 0;
                    158: }
                    159: 
1.200     matthew   160: #------------------------------------------------------------------------
                    161: #
                    162: #   LocalConnection
                    163: #     Completes the formation of a locally authenticated connection.
                    164: #     This function will ensure that the 'remote' client is really the
                    165: #     local host.  If not, the connection is closed, and the function fails.
                    166: #     If so, initcmd is parsed for the name of a file containing the
                    167: #     IDEA session key.  The fie is opened, read, deleted and the session
                    168: #     key returned to the caller.
                    169: #
                    170: # Parameters:
                    171: #   $Socket      - Socket open on client.
                    172: #   $initcmd     - The full text of the init command.
                    173: #
                    174: # Returns:
                    175: #     IDEA session key on success.
                    176: #     undef on failure.
                    177: #
                    178: sub LocalConnection {
                    179:     my ($Socket, $initcmd) = @_;
1.373     albertel  180:     Debug("Attempting local connection: $initcmd client: $clientip");
1.277     albertel  181:     if($clientip ne "127.0.0.1") {
1.200     matthew   182: 	&logthis('<font color="red"> LocalConnection rejecting non local: '
1.373     albertel  183: 		 ."$clientip ne 127.0.0.1 </font>");
1.200     matthew   184: 	close $Socket;
                    185: 	return undef;
1.224     foxr      186:     }  else {
1.200     matthew   187: 	chomp($initcmd);	# Get rid of \n in filename.
                    188: 	my ($init, $type, $name) = split(/:/, $initcmd);
                    189: 	Debug(" Init command: $init $type $name ");
                    190: 
                    191: 	# Require that $init = init, and $type = local:  Otherwise
                    192: 	# the caller is insane:
                    193: 
                    194: 	if(($init ne "init") && ($type ne "local")) {
                    195: 	    &logthis('<font color = "red"> LocalConnection: caller is insane! '
                    196: 		     ."init = $init, and type = $type </font>");
                    197: 	    close($Socket);;
                    198: 	    return undef;
                    199: 		
                    200: 	}
                    201: 	#  Now get the key filename:
                    202: 
                    203: 	my $IDEAKey = lonlocal::ReadKeyFile($name);
                    204: 	return $IDEAKey;
                    205:     }
                    206: }
                    207: #------------------------------------------------------------------------------
                    208: #
                    209: #  SSLConnection
                    210: #   Completes the formation of an ssh authenticated connection. The
                    211: #   socket is promoted to an ssl socket.  If this promotion and the associated
                    212: #   certificate exchange are successful, the IDEA key is generated and sent
                    213: #   to the remote peer via the SSL tunnel. The IDEA key is also returned to
                    214: #   the caller after the SSL tunnel is torn down.
                    215: #
                    216: # Parameters:
                    217: #   Name              Type             Purpose
                    218: #   $Socket          IO::Socket::INET  Plaintext socket.
                    219: #
                    220: # Returns:
                    221: #    IDEA key on success.
                    222: #    undef on failure.
                    223: #
                    224: sub SSLConnection {
                    225:     my $Socket   = shift;
                    226: 
                    227:     Debug("SSLConnection: ");
                    228:     my $KeyFile         = lonssl::KeyFile();
                    229:     if(!$KeyFile) {
                    230: 	my $err = lonssl::LastError();
                    231: 	&logthis("<font color=\"red\"> CRITICAL"
                    232: 		 ."Can't get key file $err </font>");
                    233: 	return undef;
                    234:     }
                    235:     my ($CACertificate,
                    236: 	$Certificate) = lonssl::CertificateFile();
                    237: 
                    238: 
                    239:     # If any of the key, certificate or certificate authority 
                    240:     # certificate filenames are not defined, this can't work.
                    241: 
                    242:     if((!$Certificate) || (!$CACertificate)) {
                    243: 	my $err = lonssl::LastError();
                    244: 	&logthis("<font color=\"red\"> CRITICAL"
                    245: 		 ."Can't get certificates: $err </font>");
                    246: 
                    247: 	return undef;
                    248:     }
                    249:     Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
                    250: 
                    251:     # Indicate to our peer that we can procede with
                    252:     # a transition to ssl authentication:
                    253: 
                    254:     print $Socket "ok:ssl\n";
                    255: 
                    256:     Debug("Approving promotion -> ssl");
                    257:     #  And do so:
                    258: 
                    259:     my $SSLSocket = lonssl::PromoteServerSocket($Socket,
                    260: 						$CACertificate,
                    261: 						$Certificate,
                    262: 						$KeyFile);
                    263:     if(! ($SSLSocket) ) {	# SSL socket promotion failed.
                    264: 	my $err = lonssl::LastError();
                    265: 	&logthis("<font color=\"red\"> CRITICAL "
                    266: 		 ."SSL Socket promotion failed: $err </font>");
                    267: 	return undef;
                    268:     }
                    269:     Debug("SSL Promotion successful");
                    270: 
                    271:     # 
                    272:     #  The only thing we'll use the socket for is to send the IDEA key
                    273:     #  to the peer:
                    274: 
                    275:     my $Key = lonlocal::CreateCipherKey();
                    276:     print $SSLSocket "$Key\n";
                    277: 
                    278:     lonssl::Close($SSLSocket); 
                    279: 
                    280:     Debug("Key exchange complete: $Key");
                    281: 
                    282:     return $Key;
                    283: }
                    284: #
                    285: #     InsecureConnection: 
                    286: #        If insecure connections are allowd,
                    287: #        exchange a challenge with the client to 'validate' the
                    288: #        client (not really, but that's the protocol):
                    289: #        We produce a challenge string that's sent to the client.
                    290: #        The client must then echo the challenge verbatim to us.
                    291: #
                    292: #  Parameter:
                    293: #      Socket      - Socket open on the client.
                    294: #  Returns:
                    295: #      1           - success.
                    296: #      0           - failure (e.g.mismatch or insecure not allowed).
                    297: #
                    298: sub InsecureConnection {
                    299:     my $Socket  =  shift;
                    300: 
                    301:     #   Don't even start if insecure connections are not allowed.
                    302: 
                    303:     if(! $perlvar{londAllowInsecure}) {	# Insecure connections not allowed.
                    304: 	return 0;
                    305:     }
                    306: 
                    307:     #   Fabricate a challenge string and send it..
                    308: 
                    309:     my $challenge = "$$".time;	# pid + time.
                    310:     print $Socket "$challenge\n";
                    311:     &status("Waiting for challenge reply");
                    312: 
                    313:     my $answer = <$Socket>;
                    314:     $answer    =~s/\W//g;
                    315:     if($challenge eq $answer) {
                    316: 	return 1;
1.224     foxr      317:     } else {
1.200     matthew   318: 	logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
                    319: 	&status("No challenge reqply");
                    320: 	return 0;
                    321:     }
                    322:     
                    323: 
                    324: }
1.251     foxr      325: #
                    326: #   Safely execute a command (as long as it's not a shel command and doesn
                    327: #   not require/rely on shell escapes.   The function operates by doing a
                    328: #   a pipe based fork and capturing stdout and stderr  from the pipe.
                    329: #
                    330: # Formal Parameters:
                    331: #     $line                    - A line of text to be executed as a command.
                    332: # Returns:
                    333: #     The output from that command.  If the output is multiline the caller
                    334: #     must know how to split up the output.
                    335: #
                    336: #
                    337: sub execute_command {
                    338:     my ($line)    = @_;
                    339:     my @words     = split(/\s/, $line);	# Bust the command up into words.
                    340:     my $output    = "";
                    341: 
                    342:     my $pid = open(CHILD, "-|");
                    343:     
                    344:     if($pid) {			# Parent process
                    345: 	Debug("In parent process for execute_command");
                    346: 	my @data = <CHILD>;	# Read the child's outupt...
                    347: 	close CHILD;
                    348: 	foreach my $output_line (@data) {
                    349: 	    Debug("Adding $output_line");
                    350: 	    $output .= $output_line; # Presumably has a \n on it.
                    351: 	}
                    352: 
                    353:     } else {			# Child process
                    354: 	close (STDERR);
                    355: 	open  (STDERR, ">&STDOUT");# Combine stderr, and stdout...
                    356: 	exec(@words);		# won't return.
                    357:     }
                    358:     return $output;
                    359: }
                    360: 
1.200     matthew   361: 
1.140     foxr      362: #   GetCertificate: Given a transaction that requires a certificate,
                    363: #   this function will extract the certificate from the transaction
                    364: #   request.  Note that at this point, the only concept of a certificate
                    365: #   is the hostname to which we are connected.
                    366: #
                    367: #   Parameter:
                    368: #      request   - The request sent by our client (this parameterization may
                    369: #                  need to change when we really use a certificate granting
                    370: #                  authority.
                    371: #
                    372: sub GetCertificate {
                    373:     my $request = shift;
                    374: 
                    375:     return $clientip;
                    376: }
1.161     foxr      377: 
1.178     foxr      378: #
                    379: #   Return true if client is a manager.
                    380: #
                    381: sub isManager {
                    382:     return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
                    383: }
                    384: #
                    385: #   Return tru if client can do client functions
                    386: #
                    387: sub isClient {
                    388:     return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
                    389: }
1.161     foxr      390: 
                    391: 
1.156     foxr      392: #
                    393: #   ReadManagerTable: Reads in the current manager table. For now this is
                    394: #                     done on each manager authentication because:
                    395: #                     - These authentications are not frequent
                    396: #                     - This allows dynamic changes to the manager table
                    397: #                       without the need to signal to the lond.
                    398: #
                    399: sub ReadManagerTable {
                    400: 
1.412     foxr      401:     &Debug("Reading manager table");
1.156     foxr      402:     #   Clean out the old table first..
                    403: 
1.166     foxr      404:    foreach my $key (keys %managers) {
                    405:       delete $managers{$key};
                    406:    }
                    407: 
                    408:    my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
                    409:    if (!open (MANAGERS, $tablename)) {
1.473     raeburn   410:        my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
                    411:        if (&Apache::lonnet::is_LC_dns($hostname)) {
1.472     raeburn   412:            &logthis('<font color="red">No manager table.  Nobody can manage!!</font>');
                    413:        }
                    414:        return;
1.166     foxr      415:    }
                    416:    while(my $host = <MANAGERS>) {
                    417:       chomp($host);
                    418:       if ($host =~ "^#") {                  # Comment line.
                    419:          next;
                    420:       }
1.368     albertel  421:       if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
1.161     foxr      422: 	    #  The entry is of the form:
                    423: 	    #    cluname:hostname
                    424: 	    #  cluname - A 'cluster hostname' is needed in order to negotiate
                    425: 	    #            the host key.
                    426: 	    #  hostname- The dns name of the host.
                    427: 	    #
1.166     foxr      428:           my($cluname, $dnsname) = split(/:/, $host);
                    429:           
                    430:           my $ip = gethostbyname($dnsname);
                    431:           if(defined($ip)) {                 # bad names don't deserve entry.
                    432:             my $hostip = inet_ntoa($ip);
                    433:             $managers{$hostip} = $cluname;
                    434:             logthis('<font color="green"> registering manager '.
                    435:                     "$dnsname as $cluname with $hostip </font>\n");
                    436:          }
                    437:       } else {
                    438:          logthis('<font color="green"> existing host'." $host</font>\n");
1.472     raeburn   439:          $managers{&Apache::lonnet::get_host_ip($host)} = $host;  # Use info from cluster tab if cluster memeber
1.166     foxr      440:       }
                    441:    }
1.156     foxr      442: }
1.140     foxr      443: 
                    444: #
                    445: #  ValidManager: Determines if a given certificate represents a valid manager.
                    446: #                in this primitive implementation, the 'certificate' is
                    447: #                just the connecting loncapa client name.  This is checked
                    448: #                against a valid client list in the configuration.
                    449: #
                    450: #                  
                    451: sub ValidManager {
                    452:     my $certificate = shift; 
                    453: 
1.163     foxr      454:     return isManager;
1.140     foxr      455: }
                    456: #
1.143     foxr      457: #  CopyFile:  Called as part of the process of installing a 
                    458: #             new configuration file.  This function copies an existing
                    459: #             file to a backup file.
                    460: # Parameters:
                    461: #     oldfile  - Name of the file to backup.
                    462: #     newfile  - Name of the backup file.
                    463: # Return:
                    464: #     0   - Failure (errno has failure reason).
                    465: #     1   - Success.
                    466: #
                    467: sub CopyFile {
1.192     foxr      468: 
                    469:     my ($oldfile, $newfile) = @_;
1.143     foxr      470: 
1.281     matthew   471:     if (! copy($oldfile,$newfile)) {
                    472:         return 0;
1.143     foxr      473:     }
1.281     matthew   474:     chmod(0660, $newfile);
                    475:     return 1;
1.143     foxr      476: }
1.157     foxr      477: #
                    478: #  Host files are passed out with externally visible host IPs.
                    479: #  If, for example, we are behind a fire-wall or NAT host, our 
                    480: #  internally visible IP may be different than the externally
                    481: #  visible IP.  Therefore, we always adjust the contents of the
                    482: #  host file so that the entry for ME is the IP that we believe
                    483: #  we have.  At present, this is defined as the entry that
                    484: #  DNS has for us.  If by some chance we are not able to get a
                    485: #  DNS translation for us, then we assume that the host.tab file
                    486: #  is correct.  
                    487: #    BUGBUGBUG - in the future, we really should see if we can
                    488: #       easily query the interface(s) instead.
                    489: # Parameter(s):
                    490: #     contents    - The contents of the host.tab to check.
                    491: # Returns:
                    492: #     newcontents - The adjusted contents.
                    493: #
                    494: #
                    495: sub AdjustHostContents {
                    496:     my $contents  = shift;
                    497:     my $adjusted;
                    498:     my $me        = $perlvar{'lonHostID'};
                    499: 
1.354     albertel  500:     foreach my $line (split(/\n/,$contents)) {
1.472     raeburn   501: 	if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
                    502:              ($line =~ /^\s*\^/))) {
1.157     foxr      503: 	    chomp($line);
                    504: 	    my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
                    505: 	    if ($id eq $me) {
1.354     albertel  506: 		my $ip = gethostbyname($name);
                    507: 		my $ipnew = inet_ntoa($ip);
                    508: 		$ip = $ipnew;
1.157     foxr      509: 		#  Reconstruct the host line and append to adjusted:
                    510: 		
1.354     albertel  511: 		my $newline = "$id:$domain:$role:$name:$ip";
                    512: 		if($maxcon ne "") { # Not all hosts have loncnew tuning params
                    513: 		    $newline .= ":$maxcon:$idleto:$mincon";
                    514: 		}
                    515: 		$adjusted .= $newline."\n";
1.157     foxr      516: 		
1.354     albertel  517: 	    } else {		# Not me, pass unmodified.
                    518: 		$adjusted .= $line."\n";
                    519: 	    }
1.157     foxr      520: 	} else {                  # Blank or comment never re-written.
                    521: 	    $adjusted .= $line."\n";	# Pass blanks and comments as is.
                    522: 	}
1.354     albertel  523:     }
                    524:     return $adjusted;
1.157     foxr      525: }
1.143     foxr      526: #
                    527: #   InstallFile: Called to install an administrative file:
1.412     foxr      528: #       - The file is created int a temp directory called <name>.tmp
                    529: #       - lcinstall file is called to install the file.
                    530: #         since the web app has no direct write access to the table directory
1.143     foxr      531: #
                    532: #  Parameters:
                    533: #       Name of the file
                    534: #       File Contents.
                    535: #  Return:
                    536: #      nonzero - success.
                    537: #      0       - failure and $! has an errno.
1.412     foxr      538: # Assumptions:
                    539: #    File installtion is a relatively infrequent
1.143     foxr      540: #
                    541: sub InstallFile {
1.192     foxr      542: 
                    543:     my ($Filename, $Contents) = @_;
1.412     foxr      544: #     my $TempFile = $Filename.".tmp";
                    545:     my $exedir = $perlvar{'lonDaemons'};
                    546:     my $tmpdir = $exedir.'/tmp/';
                    547:     my $TempFile = $tmpdir."TempTableFile.tmp";
1.143     foxr      548: 
                    549:     #  Open the file for write:
                    550: 
                    551:     my $fh = IO::File->new("> $TempFile"); # Write to temp.
                    552:     if(!(defined $fh)) {
                    553: 	&logthis('<font color="red"> Unable to create '.$TempFile."</font>");
                    554: 	return 0;
                    555:     }
                    556:     #  write the contents of the file:
                    557: 
                    558:     print $fh ($Contents); 
                    559:     $fh->close;			# In case we ever have a filesystem w. locking
                    560: 
1.412     foxr      561:     chmod(0664, $TempFile);	# Everyone can write it.
                    562: 
                    563:     # Use lcinstall file to put the file in the table directory...
                    564: 
                    565:     &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
                    566:     my $pf = IO::File->new("| $exedir/lcinstallfile   $TempFile $Filename > $exedir/logs/lcinstallfile.log");
                    567:     close $pf;
                    568:     my $err = $?;
                    569:     &Debug("Status is $err");
                    570:     if ($err != 0) {
                    571: 	my $msg = $err;
                    572: 	if ($err < @installerrors) {
                    573: 	    $msg = $installerrors[$err];
                    574: 	}
                    575: 	&logthis("Install failed for table file $Filename : $msg");
                    576: 	return 0;
                    577:     }
                    578: 
                    579:     # Remove the temp file:
1.143     foxr      580: 
1.412     foxr      581:     unlink($TempFile);
1.143     foxr      582: 
                    583:     return 1;
                    584: }
1.200     matthew   585: 
                    586: 
1.169     foxr      587: #
                    588: #   ConfigFileFromSelector: converts a configuration file selector
1.411     foxr      589: #                 into a configuration file pathname.
1.472     raeburn   590: #                 Supports the following file selectors: 
                    591: #                 hosts, domain, dns_hosts, dns_domain  
1.411     foxr      592: #
1.169     foxr      593: #
                    594: #  Parameters:
                    595: #      selector  - Configuration file selector.
                    596: #  Returns:
                    597: #      Full path to the file or undef if the selector is invalid.
                    598: #
                    599: sub ConfigFileFromSelector {
                    600:     my $selector   = shift;
                    601:     my $tablefile;
                    602: 
                    603:     my $tabledir = $perlvar{'lonTabDir'}.'/';
1.472     raeburn   604:     if (($selector eq "hosts") || ($selector eq "domain") || 
                    605:         ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
1.411     foxr      606: 	$tablefile =  $tabledir.$selector.'.tab';
1.169     foxr      607:     }
                    608:     return $tablefile;
                    609: }
1.143     foxr      610: #
1.141     foxr      611: #   PushFile:  Called to do an administrative push of a file.
                    612: #              - Ensure the file being pushed is one we support.
                    613: #              - Backup the old file to <filename.saved>
                    614: #              - Separate the contents of the new file out from the
                    615: #                rest of the request.
                    616: #              - Write the new file.
                    617: #  Parameter:
                    618: #     Request - The entire user request.  This consists of a : separated
                    619: #               string pushfile:tablename:contents.
                    620: #     NOTE:  The contents may have :'s in it as well making things a bit
                    621: #            more interesting... but not much.
                    622: #  Returns:
                    623: #     String to send to client ("ok" or "refused" if bad file).
                    624: #
                    625: sub PushFile {
1.489.2.15  raeburn   626:     my $request = shift;
1.141     foxr      627:     my ($command, $filename, $contents) = split(":", $request, 3);
1.412     foxr      628:     &Debug("PushFile");
1.141     foxr      629:     
                    630:     #  At this point in time, pushes for only the following tables are
                    631:     #  supported:
                    632:     #   hosts.tab  ($filename eq host).
                    633:     #   domain.tab ($filename eq domain).
1.472     raeburn   634:     #   dns_hosts.tab ($filename eq dns_host).
                    635:     #   dns_domain.tab ($filename eq dns_domain). 
1.141     foxr      636:     # Construct the destination filename or reject the request.
                    637:     #
                    638:     # lonManage is supposed to ensure this, however this session could be
                    639:     # part of some elaborate spoof that managed somehow to authenticate.
                    640:     #
                    641: 
1.169     foxr      642: 
                    643:     my $tablefile = ConfigFileFromSelector($filename);
                    644:     if(! (defined $tablefile)) {
1.141     foxr      645: 	return "refused";
                    646:     }
1.412     foxr      647: 
1.157     foxr      648:     #  If the file being pushed is the host file, we adjust the entry for ourself so that the
                    649:     #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible
                    650:     #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a 
                    651:     #  network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
                    652:     #  that possibilty.
                    653: 
                    654:     if($filename eq "host") {
                    655: 	$contents = AdjustHostContents($contents);
1.489.2.43.2.  (raeburn  656:):     } elsif (($filename eq 'dns_hosts') || ($filename eq 'dns_domain')) {
1.489.2.15  raeburn   657:         if ($contents eq '') {
                    658:             &logthis('<font color="red"> Pushfile: unable to install '
                    659:                     .$tablefile." - no data received from push. </font>");
                    660:             return 'error: push had no data';
                    661:         }
                    662:         if (&Apache::lonnet::get_host_ip($clientname)) {
                    663:             my $clienthost = &Apache::lonnet::hostname($clientname);
                    664:             if ($managers{$clientip} eq $clientname) {
                    665:                 my $clientprotocol = $Apache::lonnet::protocol{$clientname};
                    666:                 $clientprotocol = 'http' if ($clientprotocol ne 'https');
                    667:                 my $url = '/adm/'.$filename;
                    668:                 $url =~ s{_}{/};
                    669:                 my $ua=new LWP::UserAgent;
                    670:                 $ua->timeout(60);
                    671:                 my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
                    672:                 my $response=$ua->request($request);
                    673:                 if ($response->is_error()) {
                    674:                     &logthis('<font color="red"> Pushfile: unable to install '
                    675:                             .$tablefile." - error attempting to pull data. </font>");
                    676:                     return 'error: pull failed';
                    677:                 } else {
                    678:                     my $result = $response->content;
                    679:                     chomp($result);
                    680:                     unless ($result eq $contents) {
                    681:                         &logthis('<font color="red"> Pushfile: unable to install '
                    682:                                 .$tablefile." - pushed data and pulled data differ. </font>");
                    683:                         my $pushleng = length($contents);
                    684:                         my $pullleng = length($result);
                    685:                         if ($pushleng != $pullleng) {
                    686:                             return "error: $pushleng vs $pullleng bytes";
                    687:                         } else {
                    688:                             return "error: mismatch push and pull";
                    689:                         }
                    690:                     }
                    691:                 }
                    692:             }
                    693:         }
1.157     foxr      694:     }
                    695: 
1.141     foxr      696:     #  Install the new file:
                    697: 
1.412     foxr      698:     &logthis("Installing new $tablefile contents:\n$contents");
1.143     foxr      699:     if(!InstallFile($tablefile, $contents)) {
                    700: 	&logthis('<font color="red"> Pushfile: unable to install '
1.145     foxr      701: 	 .$tablefile." $! </font>");
1.143     foxr      702: 	return "error:$!";
1.224     foxr      703:     } else {
1.143     foxr      704: 	&logthis('<font color="green"> Installed new '.$tablefile
1.473     raeburn   705: 		 ." - transaction by: $clientname ($clientip)</font>");
1.472     raeburn   706:         my $adminmail = $perlvar{'lonAdmEMail'};
                    707:         my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
                    708:         if ($admindom ne '') {
                    709:             my %domconfig =
                    710:                 &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
                    711:             if (ref($domconfig{'contacts'}) eq 'HASH') {
                    712:                 if ($domconfig{'contacts'}{'adminemail'} ne '') {
                    713:                     $adminmail = $domconfig{'contacts'}{'adminemail'};
                    714:                 }
                    715:             }
                    716:         }
                    717:         if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
                    718:             my $msg = new Mail::Send;
                    719:             $msg->to($adminmail);
                    720:             $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
                    721:             $msg->add('Content-type','text/plain; charset=UTF-8');
                    722:             if (my $fh = $msg->open()) {
                    723:                 print $fh 'Update to '.$tablefile.' from Cluster Manager '.
1.473     raeburn   724:                           "$clientname ($clientip)\n";
1.472     raeburn   725:                 $fh->close;
                    726:             }
                    727:         }
1.143     foxr      728:     }
                    729: 
1.141     foxr      730:     #  Indicate success:
                    731:  
                    732:     return "ok";
                    733: 
                    734: }
1.145     foxr      735: 
                    736: #
                    737: #  Called to re-init either lonc or lond.
                    738: #
                    739: #  Parameters:
                    740: #    request   - The full request by the client.  This is of the form
                    741: #                reinit:<process>  
                    742: #                where <process> is allowed to be either of 
                    743: #                lonc or lond
                    744: #
                    745: #  Returns:
                    746: #     The string to be sent back to the client either:
                    747: #   ok         - Everything worked just fine.
                    748: #   error:why  - There was a failure and why describes the reason.
                    749: #
                    750: #
                    751: sub ReinitProcess {
                    752:     my $request = shift;
                    753: 
1.146     foxr      754: 
                    755:     # separate the request (reinit) from the process identifier and
                    756:     # validate it producing the name of the .pid file for the process.
                    757:     #
                    758:     #
                    759:     my ($junk, $process) = split(":", $request);
1.147     foxr      760:     my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146     foxr      761:     if($process eq 'lonc') {
                    762: 	$processpidfile = $processpidfile."lonc.pid";
1.147     foxr      763: 	if (!open(PIDFILE, "< $processpidfile")) {
                    764: 	    return "error:Open failed for $processpidfile";
                    765: 	}
                    766: 	my $loncpid = <PIDFILE>;
                    767: 	close(PIDFILE);
                    768: 	logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
                    769: 		."</font>");
                    770: 	kill("USR2", $loncpid);
1.146     foxr      771:     } elsif ($process eq 'lond') {
1.147     foxr      772: 	logthis('<font color="red"> Reinitializing self (lond) </font>');
                    773: 	&UpdateHosts;			# Lond is us!!
1.146     foxr      774:     } else {
                    775: 	&logthis('<font color="yellow" Invalid reinit request for '.$process
                    776: 		 ."</font>");
                    777: 	return "error:Invalid process identifier $process";
                    778:     }
1.145     foxr      779:     return 'ok';
                    780: }
1.168     foxr      781: #   Validate a line in a configuration file edit script:
                    782: #   Validation includes:
                    783: #     - Ensuring the command is valid.
                    784: #     - Ensuring the command has sufficient parameters
                    785: #   Parameters:
                    786: #     scriptline - A line to validate (\n has been stripped for what it's worth).
1.167     foxr      787: #
1.168     foxr      788: #   Return:
                    789: #      0     - Invalid scriptline.
                    790: #      1     - Valid scriptline
                    791: #  NOTE:
                    792: #     Only the command syntax is checked, not the executability of the
                    793: #     command.
                    794: #
                    795: sub isValidEditCommand {
                    796:     my $scriptline = shift;
                    797: 
                    798:     #   Line elements are pipe separated:
                    799: 
                    800:     my ($command, $key, $newline)  = split(/\|/, $scriptline);
                    801:     &logthis('<font color="green"> isValideditCommand checking: '.
                    802: 	     "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
                    803:     
                    804:     if ($command eq "delete") {
                    805: 	#
                    806: 	#   key with no newline.
                    807: 	#
                    808: 	if( ($key eq "") || ($newline ne "")) {
                    809: 	    return 0;		# Must have key but no newline.
                    810: 	} else {
                    811: 	    return 1;		# Valid syntax.
                    812: 	}
1.169     foxr      813:     } elsif ($command eq "replace") {
1.168     foxr      814: 	#
                    815: 	#   key and newline:
                    816: 	#
                    817: 	if (($key eq "") || ($newline eq "")) {
                    818: 	    return 0;
                    819: 	} else {
                    820: 	    return 1;
                    821: 	}
1.169     foxr      822:     } elsif ($command eq "append") {
                    823: 	if (($key ne "") && ($newline eq "")) {
                    824: 	    return 1;
                    825: 	} else {
                    826: 	    return 0;
                    827: 	}
1.168     foxr      828:     } else {
                    829: 	return 0;		# Invalid command.
                    830:     }
                    831:     return 0;			# Should not get here!!!
                    832: }
1.169     foxr      833: #
                    834: #   ApplyEdit - Applies an edit command to a line in a configuration 
                    835: #               file.  It is the caller's responsiblity to validate the
                    836: #               edit line.
                    837: #   Parameters:
                    838: #      $directive - A single edit directive to apply.  
                    839: #                   Edit directives are of the form:
                    840: #                  append|newline      - Appends a new line to the file.
                    841: #                  replace|key|newline - Replaces the line with key value 'key'
                    842: #                  delete|key          - Deletes the line with key value 'key'.
                    843: #      $editor   - A config file editor object that contains the
                    844: #                  file being edited.
                    845: #
                    846: sub ApplyEdit {
1.192     foxr      847: 
                    848:     my ($directive, $editor) = @_;
1.169     foxr      849: 
                    850:     # Break the directive down into its command and its parameters
                    851:     # (at most two at this point.  The meaning of the parameters, if in fact
                    852:     #  they exist depends on the command).
                    853: 
                    854:     my ($command, $p1, $p2) = split(/\|/, $directive);
                    855: 
                    856:     if($command eq "append") {
                    857: 	$editor->Append($p1);	          # p1 - key p2 null.
                    858:     } elsif ($command eq "replace") {
                    859: 	$editor->ReplaceLine($p1, $p2);   # p1 - key p2 = newline.
                    860:     } elsif ($command eq "delete") {
                    861: 	$editor->DeleteLine($p1);         # p1 - key p2 null.
                    862:     } else {			          # Should not get here!!!
                    863: 	die "Invalid command given to ApplyEdit $command"
                    864:     }
                    865: }
                    866: #
                    867: # AdjustOurHost:
                    868: #           Adjusts a host file stored in a configuration file editor object
                    869: #           for the true IP address of this host. This is necessary for hosts
                    870: #           that live behind a firewall.
                    871: #           Those hosts have a publicly distributed IP of the firewall, but
                    872: #           internally must use their actual IP.  We assume that a given
                    873: #           host only has a single IP interface for now.
                    874: # Formal Parameters:
                    875: #     editor   - The configuration file editor to adjust.  This
                    876: #                editor is assumed to contain a hosts.tab file.
                    877: # Strategy:
                    878: #    - Figure out our hostname.
                    879: #    - Lookup the entry for this host.
                    880: #    - Modify the line to contain our IP
                    881: #    - Do a replace for this host.
                    882: sub AdjustOurHost {
                    883:     my $editor        = shift;
                    884: 
                    885:     # figure out who I am.
                    886: 
                    887:     my $myHostName    = $perlvar{'lonHostID'}; # LonCAPA hostname.
                    888: 
                    889:     #  Get my host file entry.
                    890: 
                    891:     my $ConfigLine    = $editor->Find($myHostName);
                    892:     if(! (defined $ConfigLine)) {
                    893: 	die "AdjustOurHost - no entry for me in hosts file $myHostName";
                    894:     }
                    895:     # figure out my IP:
                    896:     #   Use the config line to get my hostname.
                    897:     #   Use gethostbyname to translate that into an IP address.
                    898:     #
1.338     albertel  899:     my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1.169     foxr      900:     #
                    901:     #  Reassemble the config line from the elements in the list.
                    902:     #  Note that if the loncnew items were not present before, they will
                    903:     #  be now even if they would be empty
                    904:     #
                    905:     my $newConfigLine = $id;
1.338     albertel  906:     foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1.169     foxr      907: 	$newConfigLine .= ":".$item;
                    908:     }
                    909:     #  Replace the line:
                    910: 
                    911:     $editor->ReplaceLine($id, $newConfigLine);
                    912:     
                    913: }
                    914: #
                    915: #   ReplaceConfigFile:
                    916: #              Replaces a configuration file with the contents of a
                    917: #              configuration file editor object.
                    918: #              This is done by:
                    919: #              - Copying the target file to <filename>.old
                    920: #              - Writing the new file to <filename>.tmp
                    921: #              - Moving <filename.tmp>  -> <filename>
                    922: #              This laborious process ensures that the system is never without
                    923: #              a configuration file that's at least valid (even if the contents
                    924: #              may be dated).
                    925: #   Parameters:
                    926: #        filename   - Name of the file to modify... this is a full path.
                    927: #        editor     - Editor containing the file.
                    928: #
                    929: sub ReplaceConfigFile {
1.192     foxr      930:     
                    931:     my ($filename, $editor) = @_;
1.168     foxr      932: 
1.169     foxr      933:     CopyFile ($filename, $filename.".old");
                    934: 
                    935:     my $contents  = $editor->Get(); # Get the contents of the file.
                    936: 
                    937:     InstallFile($filename, $contents);
                    938: }
1.168     foxr      939: #   
                    940: #
                    941: #   Called to edit a configuration table  file
1.167     foxr      942: #   Parameters:
                    943: #      request           - The entire command/request sent by lonc or lonManage
                    944: #   Return:
                    945: #      The reply to send to the client.
1.168     foxr      946: #
1.167     foxr      947: sub EditFile {
                    948:     my $request = shift;
                    949: 
                    950:     #  Split the command into it's pieces:  edit:filetype:script
                    951: 
1.339     albertel  952:     my ($cmd, $filetype, $script) = split(/:/, $request,3);	# : in script
1.167     foxr      953: 
                    954:     #  Check the pre-coditions for success:
                    955: 
1.339     albertel  956:     if($cmd != "edit") {	# Something is amiss afoot alack.
1.167     foxr      957: 	return "error:edit request detected, but request != 'edit'\n";
                    958:     }
                    959:     if( ($filetype ne "hosts")  &&
                    960: 	($filetype ne "domain")) {
                    961: 	return "error:edit requested with invalid file specifier: $filetype \n";
                    962:     }
                    963: 
                    964:     #   Split the edit script and check it's validity.
1.168     foxr      965: 
                    966:     my @scriptlines = split(/\n/, $script);  # one line per element.
                    967:     my $linecount   = scalar(@scriptlines);
                    968:     for(my $i = 0; $i < $linecount; $i++) {
                    969: 	chomp($scriptlines[$i]);
                    970: 	if(!isValidEditCommand($scriptlines[$i])) {
                    971: 	    return "error:edit with bad script line: '$scriptlines[$i]' \n";
                    972: 	}
                    973:     }
1.145     foxr      974: 
1.167     foxr      975:     #   Execute the edit operation.
1.169     foxr      976:     #   - Create a config file editor for the appropriate file and 
                    977:     #   - execute each command in the script:
                    978:     #
                    979:     my $configfile = ConfigFileFromSelector($filetype);
                    980:     if (!(defined $configfile)) {
                    981: 	return "refused\n";
                    982:     }
                    983:     my $editor = ConfigFileEdit->new($configfile);
1.167     foxr      984: 
1.169     foxr      985:     for (my $i = 0; $i < $linecount; $i++) {
                    986: 	ApplyEdit($scriptlines[$i], $editor);
                    987:     }
                    988:     # If the file is the host file, ensure that our host is
                    989:     # adjusted to have our ip:
                    990:     #
                    991:     if($filetype eq "host") {
                    992: 	AdjustOurHost($editor);
                    993:     }
                    994:     #  Finally replace the current file with our file.
                    995:     #
                    996:     ReplaceConfigFile($configfile, $editor);
1.167     foxr      997: 
                    998:     return "ok\n";
                    999: }
1.207     foxr     1000: 
1.255     foxr     1001: #   read_profile
                   1002: #
                   1003: #   Returns a set of specific entries from a user's profile file.
                   1004: #   this is a utility function that is used by both get_profile_entry and
                   1005: #   get_profile_entry_encrypted.
                   1006: #
                   1007: # Parameters:
                   1008: #    udom       - Domain in which the user exists.
                   1009: #    uname      - User's account name (loncapa account)
                   1010: #    namespace  - The profile namespace to open.
                   1011: #    what       - A set of & separated queries.
                   1012: # Returns:
                   1013: #    If all ok: - The string that needs to be shipped back to the user.
                   1014: #    If failure - A string that starts with error: followed by the failure
                   1015: #                 reason.. note that this probabyl gets shipped back to the
                   1016: #                 user as well.
                   1017: #
                   1018: sub read_profile {
                   1019:     my ($udom, $uname, $namespace, $what) = @_;
                   1020:     
                   1021:     my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   1022: 				 &GDBM_READER());
                   1023:     if ($hashref) {
                   1024:         my @queries=split(/\&/,$what);
1.440     raeburn  1025:         if ($namespace eq 'roles') {
                   1026:             @queries = map { &unescape($_); } @queries; 
                   1027:         }
1.255     foxr     1028:         my $qresult='';
                   1029: 	
                   1030: 	for (my $i=0;$i<=$#queries;$i++) {
                   1031: 	    $qresult.="$hashref->{$queries[$i]}&";    # Presumably failure gives empty string.
                   1032: 	}
                   1033: 	$qresult=~s/\&$//;              # Remove trailing & from last lookup.
1.311     albertel 1034: 	if (&untie_user_hash($hashref)) {
1.255     foxr     1035: 	    return $qresult;
                   1036: 	} else {
                   1037: 	    return "error: ".($!+0)." untie (GDBM) Failed";
                   1038: 	}
                   1039:     } else {
                   1040: 	if ($!+0 == 2) {
                   1041: 	    return "error:No such file or GDBM reported bad block error";
                   1042: 	} else {
                   1043: 	    return "error: ".($!+0)." tie (GDBM) Failed";
                   1044: 	}
                   1045:     }
                   1046: 
                   1047: }
1.214     foxr     1048: #--------------------- Request Handlers --------------------------------------------
                   1049: #
1.215     foxr     1050: #   By convention each request handler registers itself prior to the sub 
                   1051: #   declaration:
1.214     foxr     1052: #
                   1053: 
1.216     foxr     1054: #++
                   1055: #
1.214     foxr     1056: #  Handles ping requests.
                   1057: #  Parameters:
                   1058: #      $cmd    - the actual keyword that invoked us.
                   1059: #      $tail   - the tail of the request that invoked us.
                   1060: #      $replyfd- File descriptor connected to the client
                   1061: #  Implicit Inputs:
                   1062: #      $currenthostid - Global variable that carries the name of the host we are
                   1063: #                       known as.
                   1064: #  Returns:
                   1065: #      1       - Ok to continue processing.
                   1066: #      0       - Program should exit.
                   1067: #  Side effects:
                   1068: #      Reply information is sent to the client.
                   1069: sub ping_handler {
                   1070:     my ($cmd, $tail, $client) = @_;
                   1071:     Debug("$cmd $tail $client .. $currenthostid:");
                   1072:    
1.387     albertel 1073:     Reply( $client,\$currenthostid,"$cmd:$tail");
1.214     foxr     1074:    
                   1075:     return 1;
                   1076: }
                   1077: &register_handler("ping", \&ping_handler, 0, 1, 1);       # Ping unencoded, client or manager.
                   1078: 
1.216     foxr     1079: #++
1.215     foxr     1080: #
                   1081: # Handles pong requests.  Pong replies with our current host id, and
                   1082: #                         the results of a ping sent to us via our lonc.
                   1083: #
                   1084: # Parameters:
                   1085: #      $cmd    - the actual keyword that invoked us.
                   1086: #      $tail   - the tail of the request that invoked us.
                   1087: #      $replyfd- File descriptor connected to the client
                   1088: #  Implicit Inputs:
                   1089: #      $currenthostid - Global variable that carries the name of the host we are
                   1090: #                       connected to.
                   1091: #  Returns:
                   1092: #      1       - Ok to continue processing.
                   1093: #      0       - Program should exit.
                   1094: #  Side effects:
                   1095: #      Reply information is sent to the client.
                   1096: sub pong_handler {
                   1097:     my ($cmd, $tail, $replyfd) = @_;
                   1098: 
1.365     albertel 1099:     my $reply=&Apache::lonnet::reply("ping",$clientname);
1.215     foxr     1100:     &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail"); 
                   1101:     return 1;
                   1102: }
                   1103: &register_handler("pong", \&pong_handler, 0, 1, 1);       # Pong unencoded, client or manager
                   1104: 
1.216     foxr     1105: #++
                   1106: #      Called to establish an encrypted session key with the remote client.
                   1107: #      Note that with secure lond, in most cases this function is never
                   1108: #      invoked.  Instead, the secure session key is established either
                   1109: #      via a local file that's locked down tight and only lives for a short
                   1110: #      time, or via an ssl tunnel...and is generated from a bunch-o-random
                   1111: #      bits from /dev/urandom, rather than the predictable pattern used by
                   1112: #      by this sub.  This sub is only used in the old-style insecure
                   1113: #      key negotiation.
                   1114: # Parameters:
                   1115: #      $cmd    - the actual keyword that invoked us.
                   1116: #      $tail   - the tail of the request that invoked us.
                   1117: #      $replyfd- File descriptor connected to the client
                   1118: #  Implicit Inputs:
                   1119: #      $currenthostid - Global variable that carries the name of the host
                   1120: #                       known as.
1.448     raeburn  1121: #      $clientname    - Global variable that carries the name of the host we're connected to.
1.216     foxr     1122: #  Returns:
                   1123: #      1       - Ok to continue processing.
                   1124: #      0       - Program should exit.
                   1125: #  Implicit Outputs:
                   1126: #      Reply information is sent to the client.
                   1127: #      $cipher is set with a reference to a new IDEA encryption object.
                   1128: #
                   1129: sub establish_key_handler {
                   1130:     my ($cmd, $tail, $replyfd) = @_;
                   1131: 
                   1132:     my $buildkey=time.$$.int(rand 100000);
                   1133:     $buildkey=~tr/1-6/A-F/;
                   1134:     $buildkey=int(rand 100000).$buildkey.int(rand 100000);
                   1135:     my $key=$currenthostid.$clientname;
                   1136:     $key=~tr/a-z/A-Z/;
                   1137:     $key=~tr/G-P/0-9/;
                   1138:     $key=~tr/Q-Z/0-9/;
                   1139:     $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
                   1140:     $key=substr($key,0,32);
                   1141:     my $cipherkey=pack("H32",$key);
                   1142:     $cipher=new IDEA $cipherkey;
1.387     albertel 1143:     &Reply($replyfd, \$buildkey, "$cmd:$tail"); 
1.216     foxr     1144:    
                   1145:     return 1;
                   1146: 
                   1147: }
                   1148: &register_handler("ekey", \&establish_key_handler, 0, 1,1);
                   1149: 
1.217     foxr     1150: #     Handler for the load command.  Returns the current system load average
                   1151: #     to the requestor.
                   1152: #
                   1153: # Parameters:
                   1154: #      $cmd    - the actual keyword that invoked us.
                   1155: #      $tail   - the tail of the request that invoked us.
                   1156: #      $replyfd- File descriptor connected to the client
                   1157: #  Implicit Inputs:
                   1158: #      $currenthostid - Global variable that carries the name of the host
                   1159: #                       known as.
1.448     raeburn  1160: #      $clientname    - Global variable that carries the name of the host we're connected to.
1.217     foxr     1161: #  Returns:
                   1162: #      1       - Ok to continue processing.
                   1163: #      0       - Program should exit.
                   1164: #  Side effects:
                   1165: #      Reply information is sent to the client.
                   1166: sub load_handler {
                   1167:     my ($cmd, $tail, $replyfd) = @_;
                   1168: 
1.463     foxr     1169: 
                   1170: 
1.217     foxr     1171:    # Get the load average from /proc/loadavg and calculate it as a percentage of
                   1172:    # the allowed load limit as set by the perl global variable lonLoadLim
                   1173: 
                   1174:     my $loadavg;
                   1175:     my $loadfile=IO::File->new('/proc/loadavg');
                   1176:    
                   1177:     $loadavg=<$loadfile>;
                   1178:     $loadavg =~ s/\s.*//g;                      # Extract the first field only.
                   1179:    
                   1180:     my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
                   1181: 
1.387     albertel 1182:     &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1.217     foxr     1183:    
                   1184:     return 1;
                   1185: }
1.263     albertel 1186: &register_handler("load", \&load_handler, 0, 1, 0);
1.217     foxr     1187: 
                   1188: #
                   1189: #   Process the userload request.  This sub returns to the client the current
                   1190: #  user load average.  It can be invoked either by clients or managers.
                   1191: #
                   1192: # Parameters:
                   1193: #      $cmd    - the actual keyword that invoked us.
                   1194: #      $tail   - the tail of the request that invoked us.
                   1195: #      $replyfd- File descriptor connected to the client
                   1196: #  Implicit Inputs:
                   1197: #      $currenthostid - Global variable that carries the name of the host
                   1198: #                       known as.
1.448     raeburn  1199: #      $clientname    - Global variable that carries the name of the host we're connected to.
1.217     foxr     1200: #  Returns:
                   1201: #      1       - Ok to continue processing.
                   1202: #      0       - Program should exit
                   1203: # Implicit inputs:
                   1204: #     whatever the userload() function requires.
                   1205: #  Implicit outputs:
                   1206: #     the reply is written to the client.
                   1207: #
                   1208: sub user_load_handler {
                   1209:     my ($cmd, $tail, $replyfd) = @_;
                   1210: 
1.365     albertel 1211:     my $userloadpercent=&Apache::lonnet::userload();
1.387     albertel 1212:     &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1.217     foxr     1213:     
                   1214:     return 1;
                   1215: }
1.263     albertel 1216: &register_handler("userload", \&user_load_handler, 0, 1, 0);
1.217     foxr     1217: 
1.218     foxr     1218: #   Process a request for the authorization type of a user:
                   1219: #   (userauth).
                   1220: #
                   1221: # Parameters:
                   1222: #      $cmd    - the actual keyword that invoked us.
                   1223: #      $tail   - the tail of the request that invoked us.
                   1224: #      $replyfd- File descriptor connected to the client
                   1225: #  Returns:
                   1226: #      1       - Ok to continue processing.
                   1227: #      0       - Program should exit
                   1228: # Implicit outputs:
                   1229: #    The user authorization type is written to the client.
                   1230: #
                   1231: sub user_authorization_type {
                   1232:     my ($cmd, $tail, $replyfd) = @_;
                   1233:    
                   1234:     my $userinput = "$cmd:$tail";
                   1235:    
                   1236:     #  Pull the domain and username out of the command tail.
1.222     foxr     1237:     # and call get_auth_type to determine the authentication type.
1.218     foxr     1238:    
                   1239:     my ($udom,$uname)=split(/:/,$tail);
1.222     foxr     1240:     my $result = &get_auth_type($udom, $uname);
1.218     foxr     1241:     if($result eq "nouser") {
                   1242: 	&Failure( $replyfd, "unknown_user\n", $userinput);
                   1243:     } else {
                   1244: 	#
1.222     foxr     1245: 	# We only want to pass the second field from get_auth_type
1.218     foxr     1246: 	# for ^krb.. otherwise we'll be handing out the encrypted
                   1247: 	# password for internals e.g.
                   1248: 	#
                   1249: 	my ($type,$otherinfo) = split(/:/,$result);
                   1250: 	if($type =~ /^krb/) {
                   1251: 	    $type = $result;
1.269     raeburn  1252: 	} else {
                   1253:             $type .= ':';
                   1254:         }
1.387     albertel 1255: 	&Reply( $replyfd, \$type, $userinput);
1.218     foxr     1256:     }
                   1257:   
                   1258:     return 1;
                   1259: }
                   1260: &register_handler("currentauth", \&user_authorization_type, 1, 1, 0);
                   1261: 
                   1262: #   Process a request by a manager to push a hosts or domain table 
                   1263: #   to us.  We pick apart the command and pass it on to the subs
                   1264: #   that already exist to do this.
                   1265: #
                   1266: # Parameters:
                   1267: #      $cmd    - the actual keyword that invoked us.
                   1268: #      $tail   - the tail of the request that invoked us.
                   1269: #      $client - File descriptor connected to the client
                   1270: #  Returns:
                   1271: #      1       - Ok to continue processing.
                   1272: #      0       - Program should exit
                   1273: # Implicit Output:
                   1274: #    a reply is written to the client.
                   1275: sub push_file_handler {
                   1276:     my ($cmd, $tail, $client) = @_;
1.412     foxr     1277:     &Debug("In push file handler");
1.218     foxr     1278:     my $userinput = "$cmd:$tail";
                   1279: 
                   1280:     # At this time we only know that the IP of our partner is a valid manager
                   1281:     # the code below is a hook to do further authentication (e.g. to resolve
                   1282:     # spoofing).
                   1283: 
                   1284:     my $cert = &GetCertificate($userinput);
1.412     foxr     1285:     if(&ValidManager($cert)) {
                   1286: 	&Debug("Valid manager: $client");
1.218     foxr     1287: 
                   1288: 	# Now presumably we have the bona fides of both the peer host and the
                   1289: 	# process making the request.
                   1290:       
                   1291: 	my $reply = &PushFile($userinput);
1.387     albertel 1292: 	&Reply($client, \$reply, $userinput);
1.218     foxr     1293: 
                   1294:     } else {
1.412     foxr     1295: 	&logthis("push_file_handler $client is not valid");
1.218     foxr     1296: 	&Failure( $client, "refused\n", $userinput);
                   1297:     } 
1.219     foxr     1298:     return 1;
1.218     foxr     1299: }
                   1300: &register_handler("pushfile", \&push_file_handler, 1, 0, 1);
                   1301: 
1.399     raeburn  1302: # The du_handler routine should be considered obsolete and is retained
                   1303: # for communication with legacy servers.  Please see the du2_handler.
1.243     banghart 1304: #
1.399     raeburn  1305: #   du  - list the disk usage of a directory recursively. 
1.243     banghart 1306: #    
                   1307: #   note: stolen code from the ls file handler
                   1308: #   under construction by Rick Banghart 
                   1309: #    .
                   1310: # Parameters:
                   1311: #    $cmd        - The command that dispatched us (du).
                   1312: #    $ududir     - The directory path to list... I'm not sure what this
                   1313: #                  is relative as things like ls:. return e.g.
                   1314: #                  no_such_dir.
                   1315: #    $client     - Socket open on the client.
                   1316: # Returns:
                   1317: #     1 - indicating that the daemon should not disconnect.
                   1318: # Side Effects:
                   1319: #   The reply is written to  $client.
                   1320: #
                   1321: sub du_handler {
                   1322:     my ($cmd, $ududir, $client) = @_;
1.339     albertel 1323:     ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1.251     foxr     1324:     my $userinput = "$cmd:$ududir";
                   1325: 
1.245     albertel 1326:     if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
                   1327: 	&Failure($client,"refused\n","$cmd:$ududir");
                   1328: 	return 1;
                   1329:     }
1.249     foxr     1330:     #  Since $ududir could have some nasties in it,
                   1331:     #  we will require that ududir is a valid
                   1332:     #  directory.  Just in case someone tries to
                   1333:     #  slip us a  line like .;(cd /home/httpd rm -rf*)
                   1334:     #  etc.
                   1335:     #
                   1336:     if (-d $ududir) {
1.292     albertel 1337: 	my $total_size=0;
                   1338: 	my $code=sub { 
                   1339: 	    if ($_=~/\.\d+\./) { return;} 
                   1340: 	    if ($_=~/\.meta$/) { return;}
1.362     albertel 1341: 	    if (-d $_)         { return;}
1.292     albertel 1342: 	    $total_size+=(stat($_))[7];
                   1343: 	};
1.295     raeburn  1344: 	chdir($ududir);
1.292     albertel 1345: 	find($code,$ududir);
                   1346: 	$total_size=int($total_size/1024);
1.387     albertel 1347: 	&Reply($client,\$total_size,"$cmd:$ududir");
1.249     foxr     1348:     } else {
1.251     foxr     1349: 	&Failure($client, "bad_directory:$ududir\n","$cmd:$ududir"); 
1.249     foxr     1350:     }
1.243     banghart 1351:     return 1;
                   1352: }
                   1353: &register_handler("du", \&du_handler, 0, 1, 0);
1.218     foxr     1354: 
1.399     raeburn  1355: # Please also see the du_handler, which is obsoleted by du2. 
                   1356: # du2_handler differs from du_handler in that required path to directory
                   1357: # provided by &propath() is prepended in the handler instead of on the 
                   1358: # client side.
1.239     foxr     1359: #
1.399     raeburn  1360: #   du2  - list the disk usage of a directory recursively.
                   1361: #
                   1362: # Parameters:
                   1363: #    $cmd        - The command that dispatched us (du).
                   1364: #    $tail       - The tail of the request that invoked us.
                   1365: #                  $tail is a : separated list of the following:
                   1366: #                   - $ududir - directory path to list (before prepending)
                   1367: #                   - $getpropath = 1 if &propath() should prepend
                   1368: #                   - $uname - username to use for &propath or user dir
                   1369: #                   - $udom - domain to use for &propath or user dir
                   1370: #                   All are escaped.
                   1371: #    $client     - Socket open on the client.
                   1372: # Returns:
                   1373: #     1 - indicating that the daemon should not disconnect.
                   1374: # Side Effects:
                   1375: #   The reply is written to $client.
                   1376: #
                   1377: 
                   1378: sub du2_handler {
                   1379:     my ($cmd, $tail, $client) = @_;
                   1380:     my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
                   1381:     my $userinput = "$cmd:$tail";
                   1382:     if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
                   1383:         &Failure($client,"refused\n","$cmd:$tail");
                   1384:         return 1;
                   1385:     }
                   1386:     if ($getpropath) {
                   1387:         if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
                   1388:             $ududir = &propath($udom,$uname).'/'.$ududir;
                   1389:         } else {
                   1390:             &Failure($client,"refused\n","$cmd:$tail");
                   1391:             return 1;
                   1392:         }
                   1393:     }
                   1394:     #  Since $ududir could have some nasties in it,
                   1395:     #  we will require that ududir is a valid
                   1396:     #  directory.  Just in case someone tries to
                   1397:     #  slip us a  line like .;(cd /home/httpd rm -rf*)
                   1398:     #  etc.
                   1399:     #
                   1400:     if (-d $ududir) {
                   1401:         my $total_size=0;
                   1402:         my $code=sub {
                   1403:             if ($_=~/\.\d+\./) { return;}
                   1404:             if ($_=~/\.meta$/) { return;}
                   1405:             if (-d $_)         { return;}
                   1406:             $total_size+=(stat($_))[7];
                   1407:         };
                   1408:         chdir($ududir);
                   1409:         find($code,$ududir);
                   1410:         $total_size=int($total_size/1024);
                   1411:         &Reply($client,\$total_size,"$cmd:$ududir");
                   1412:     } else {
                   1413:         &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
                   1414:     }
                   1415:     return 1;
                   1416: }
                   1417: &register_handler("du2", \&du2_handler, 0, 1, 0);
                   1418: 
                   1419: #
                   1420: # The ls_handler routine should be considered obsolete and is retained
                   1421: # for communication with legacy servers.  Please see the ls3_handler.
1.280     matthew  1422: #
1.239     foxr     1423: #   ls  - list the contents of a directory.  For each file in the
                   1424: #    selected directory the filename followed by the full output of
                   1425: #    the stat function is returned.  The returned info for each
                   1426: #    file are separated by ':'.  The stat fields are separated by &'s.
1.489.2.23  raeburn  1427: #
                   1428: #    If the requested path contains /../ or is:
                   1429: #
                   1430: #    1. for a directory, and the path does not begin with one of:
1.489.2.25  raeburn  1431: #        (a) /home/httpd/html/res/<domain>
1.489.2.28  raeburn  1432: #        (b) /home/httpd/html/userfiles/
1.489.2.23  raeburn  1433: #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
                   1434: #    or is:
                   1435: #
1.489.2.28  raeburn  1436: #    2. for a file, and the path (after prepending) does not begin with one of:
                   1437: #        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
                   1438: #        (b) /home/httpd/html/res/<domain>/<username>/
                   1439: #        (c) /home/httpd/html/userfiles/<domain>/<username>/
1.489.2.23  raeburn  1440: #
                   1441: #    the response will be "refused".
                   1442: #
1.239     foxr     1443: # Parameters:
                   1444: #    $cmd        - The command that dispatched us (ls).
                   1445: #    $ulsdir     - The directory path to list... I'm not sure what this
                   1446: #                  is relative as things like ls:. return e.g.
                   1447: #                  no_such_dir.
                   1448: #    $client     - Socket open on the client.
                   1449: # Returns:
                   1450: #     1 - indicating that the daemon should not disconnect.
                   1451: # Side Effects:
                   1452: #   The reply is written to  $client.
                   1453: #
                   1454: sub ls_handler {
1.280     matthew  1455:     # obsoleted by ls2_handler
1.239     foxr     1456:     my ($cmd, $ulsdir, $client) = @_;
                   1457: 
                   1458:     my $userinput = "$cmd:$ulsdir";
                   1459: 
                   1460:     my $obs;
                   1461:     my $rights;
                   1462:     my $ulsout='';
                   1463:     my $ulsfn;
1.489.2.23  raeburn  1464:     if ($ulsdir =~m{/\.\./}) {
                   1465:         &Failure($client,"refused\n",$userinput);
                   1466:         return 1;
                   1467:     }
1.239     foxr     1468:     if (-e $ulsdir) {
                   1469: 	if(-d $ulsdir) {
1.489.2.28  raeburn  1470:             unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
                   1471:                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1.489.2.23  raeburn  1472:                 &Failure($client,"refused\n",$userinput);
                   1473:                 return 1;
                   1474:             }
1.239     foxr     1475: 	    if (opendir(LSDIR,$ulsdir)) {
                   1476: 		while ($ulsfn=readdir(LSDIR)) {
1.291     albertel 1477: 		    undef($obs);
                   1478: 		    undef($rights); 
1.239     foxr     1479: 		    my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                   1480: 		    #We do some obsolete checking here
                   1481: 		    if(-e $ulsdir.'/'.$ulsfn.".meta") { 
                   1482: 			open(FILE, $ulsdir.'/'.$ulsfn.".meta");
                   1483: 			my @obsolete=<FILE>;
                   1484: 			foreach my $obsolete (@obsolete) {
1.301     www      1485: 			    if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 
1.239     foxr     1486: 			    if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
                   1487: 			}
                   1488: 		    }
                   1489: 		    $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
                   1490: 		    if($obs eq '1') { $ulsout.="&1"; }
                   1491: 		    else { $ulsout.="&0"; }
                   1492: 		    if($rights eq '1') { $ulsout.="&1:"; }
                   1493: 		    else { $ulsout.="&0:"; }
                   1494: 		}
                   1495: 		closedir(LSDIR);
                   1496: 	    }
                   1497: 	} else {
1.489.2.28  raeburn  1498:             unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
                   1499:                     ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) { 
1.489.2.23  raeburn  1500:                 &Failure($client,"refused\n",$userinput);
                   1501:                 return 1;
                   1502:             }
1.239     foxr     1503: 	    my @ulsstats=stat($ulsdir);
                   1504: 	    $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                   1505: 	}
                   1506:     } else {
                   1507: 	$ulsout='no_such_dir';
                   1508:     }
                   1509:     if ($ulsout eq '') { $ulsout='empty'; }
1.387     albertel 1510:     &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.239     foxr     1511:     
                   1512:     return 1;
                   1513: 
                   1514: }
                   1515: &register_handler("ls", \&ls_handler, 0, 1, 0);
                   1516: 
1.399     raeburn  1517: # The ls2_handler routine should be considered obsolete and is retained
                   1518: # for communication with legacy servers.  Please see the ls3_handler.
                   1519: # Please also see the ls_handler, which was itself obsoleted by ls2.
1.280     matthew  1520: # ls2_handler differs from ls_handler in that it escapes its return 
                   1521: # values before concatenating them together with ':'s.
                   1522: #
                   1523: #   ls2  - list the contents of a directory.  For each file in the
                   1524: #    selected directory the filename followed by the full output of
                   1525: #    the stat function is returned.  The returned info for each
                   1526: #    file are separated by ':'.  The stat fields are separated by &'s.
1.489.2.23  raeburn  1527: #
                   1528: #    If the requested path contains /../ or is:
                   1529: #
                   1530: #    1. for a directory, and the path does not begin with one of:
1.489.2.25  raeburn  1531: #        (a) /home/httpd/html/res/<domain>
1.489.2.28  raeburn  1532: #        (b) /home/httpd/html/userfiles/
1.489.2.23  raeburn  1533: #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
                   1534: #    or is:
                   1535: #
1.489.2.28  raeburn  1536: #    2. for a file, and the path (after prepending) does not begin with one of:
                   1537: #        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
                   1538: #        (b) /home/httpd/html/res/<domain>/<username>/
                   1539: #        (c) /home/httpd/html/userfiles/<domain>/<username>/
1.489.2.23  raeburn  1540: #
                   1541: #    the response will be "refused".
                   1542: #
1.280     matthew  1543: # Parameters:
                   1544: #    $cmd        - The command that dispatched us (ls).
                   1545: #    $ulsdir     - The directory path to list... I'm not sure what this
                   1546: #                  is relative as things like ls:. return e.g.
                   1547: #                  no_such_dir.
                   1548: #    $client     - Socket open on the client.
                   1549: # Returns:
                   1550: #     1 - indicating that the daemon should not disconnect.
                   1551: # Side Effects:
                   1552: #   The reply is written to  $client.
                   1553: #
                   1554: sub ls2_handler {
                   1555:     my ($cmd, $ulsdir, $client) = @_;
                   1556: 
                   1557:     my $userinput = "$cmd:$ulsdir";
                   1558: 
                   1559:     my $obs;
                   1560:     my $rights;
                   1561:     my $ulsout='';
                   1562:     my $ulsfn;
1.489.2.23  raeburn  1563:     if ($ulsdir =~m{/\.\./}) {
                   1564:         &Failure($client,"refused\n",$userinput);
                   1565:         return 1;
                   1566:     }
1.280     matthew  1567:     if (-e $ulsdir) {
                   1568:         if(-d $ulsdir) {
1.489.2.28  raeburn  1569:             unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
                   1570:                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1.489.2.23  raeburn  1571:                 &Failure($client,"refused\n","$userinput");
                   1572:                 return 1;
                   1573:             }
1.280     matthew  1574:             if (opendir(LSDIR,$ulsdir)) {
                   1575:                 while ($ulsfn=readdir(LSDIR)) {
1.291     albertel 1576:                     undef($obs);
                   1577: 		    undef($rights); 
1.280     matthew  1578:                     my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                   1579:                     #We do some obsolete checking here
                   1580:                     if(-e $ulsdir.'/'.$ulsfn.".meta") { 
                   1581:                         open(FILE, $ulsdir.'/'.$ulsfn.".meta");
                   1582:                         my @obsolete=<FILE>;
                   1583:                         foreach my $obsolete (@obsolete) {
1.301     www      1584:                             if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 
1.280     matthew  1585:                             if($obsolete =~ m|(<copyright>)(default)|) {
                   1586:                                 $rights = 1;
                   1587:                             }
                   1588:                         }
                   1589:                     }
                   1590:                     my $tmp = $ulsfn.'&'.join('&',@ulsstats);
                   1591:                     if ($obs    eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
                   1592:                     if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
                   1593:                     $ulsout.= &escape($tmp).':';
                   1594:                 }
                   1595:                 closedir(LSDIR);
                   1596:             }
                   1597:         } else {
1.489.2.28  raeburn  1598:             unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
                   1599:                     ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1.489.2.23  raeburn  1600:                 &Failure($client,"refused\n",$userinput);
                   1601:                 return 1;
                   1602:             }
1.280     matthew  1603:             my @ulsstats=stat($ulsdir);
                   1604:             $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                   1605:         }
                   1606:     } else {
                   1607:         $ulsout='no_such_dir';
                   1608:    }
                   1609:    if ($ulsout eq '') { $ulsout='empty'; }
1.387     albertel 1610:    &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.280     matthew  1611:    return 1;
                   1612: }
                   1613: &register_handler("ls2", \&ls2_handler, 0, 1, 0);
1.399     raeburn  1614: #
                   1615: #   ls3  - list the contents of a directory.  For each file in the
                   1616: #    selected directory the filename followed by the full output of
                   1617: #    the stat function is returned.  The returned info for each
                   1618: #    file are separated by ':'.  The stat fields are separated by &'s.
1.489.2.23  raeburn  1619: #
                   1620: #    If the requested path (after prepending) contains /../ or is:
                   1621: #
                   1622: #    1. for a directory, and the path does not begin with one of:
1.489.2.25  raeburn  1623: #        (a) /home/httpd/html/res/<domain>
1.489.2.28  raeburn  1624: #        (b) /home/httpd/html/userfiles/
1.489.2.23  raeburn  1625: #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1.489.2.28  raeburn  1626: #        (d) /home/httpd/html/priv/<domain> and client is the homeserver
1.489.2.23  raeburn  1627: #
                   1628: #    or is:
                   1629: #
1.489.2.28  raeburn  1630: #    2. for a file, and the path (after prepending) does not begin with one of:
                   1631: #        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
                   1632: #        (b) /home/httpd/html/res/<domain>/<username>/
                   1633: #        (c) /home/httpd/html/userfiles/<domain>/<username>/
                   1634: #        (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver
1.489.2.23  raeburn  1635: #
                   1636: #    the response will be "refused".
                   1637: #
1.399     raeburn  1638: # Parameters:
                   1639: #    $cmd        - The command that dispatched us (ls).
                   1640: #    $tail       - The tail of the request that invoked us.
                   1641: #                  $tail is a : separated list of the following:
                   1642: #                   - $ulsdir - directory path to list (before prepending)
                   1643: #                   - $getpropath = 1 if &propath() should prepend
                   1644: #                   - $getuserdir = 1 if path to user dir in lonUsers should
                   1645: #                                     prepend
                   1646: #                   - $alternate_root - path to prepend
                   1647: #                   - $uname - username to use for &propath or user dir
                   1648: #                   - $udom - domain to use for &propath or user dir
                   1649: #            All of these except $getpropath and &getuserdir are escaped.    
                   1650: #                  no_such_dir.
                   1651: #    $client     - Socket open on the client.
                   1652: # Returns:
                   1653: #     1 - indicating that the daemon should not disconnect.
                   1654: # Side Effects:
                   1655: #   The reply is written to $client.
                   1656: #
                   1657: 
                   1658: sub ls3_handler {
                   1659:     my ($cmd, $tail, $client) = @_;
                   1660:     my $userinput = "$cmd:$tail";
                   1661:     my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
                   1662:         split(/:/,$tail);
                   1663:     if (defined($ulsdir)) {
                   1664:         $ulsdir = &unescape($ulsdir);
                   1665:     }
                   1666:     if (defined($alternate_root)) {
                   1667:         $alternate_root = &unescape($alternate_root);
                   1668:     }
                   1669:     if (defined($uname)) {
                   1670:         $uname = &unescape($uname);
                   1671:     }
                   1672:     if (defined($udom)) {
                   1673:         $udom = &unescape($udom);
                   1674:     }
                   1675: 
                   1676:     my $dir_root = $perlvar{'lonDocRoot'};
1.489.2.23  raeburn  1677:     if (($getpropath) || ($getuserdir)) {
1.399     raeburn  1678:         if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
                   1679:             $dir_root = &propath($udom,$uname);
                   1680:             $dir_root =~ s/\/$//;
                   1681:         } else {
1.489.2.23  raeburn  1682:             &Failure($client,"refused\n",$userinput);
1.399     raeburn  1683:             return 1;
                   1684:         }
1.400     raeburn  1685:     } elsif ($alternate_root ne '') {
1.399     raeburn  1686:         $dir_root = $alternate_root;
                   1687:     }
1.408     raeburn  1688:     if (($dir_root ne '') && ($dir_root ne '/')) {
1.400     raeburn  1689:         if ($ulsdir =~ /^\//) {
                   1690:             $ulsdir = $dir_root.$ulsdir;
                   1691:         } else {
                   1692:             $ulsdir = $dir_root.'/'.$ulsdir;
                   1693:         }
1.399     raeburn  1694:     }
1.489.2.23  raeburn  1695:     if ($ulsdir =~m{/\.\./}) {
                   1696:         &Failure($client,"refused\n",$userinput);
                   1697:         return 1;
                   1698:     }
                   1699:     my $islocal;
                   1700:     my @machine_ids = &Apache::lonnet::current_machine_ids();
                   1701:     if (grep(/^\Q$clientname\E$/,@machine_ids)) {
                   1702:         $islocal = 1;
                   1703:     }
1.399     raeburn  1704:     my $obs;
                   1705:     my $rights;
                   1706:     my $ulsout='';
                   1707:     my $ulsfn;
                   1708:     if (-e $ulsdir) {
                   1709:         if(-d $ulsdir) {
1.489.2.23  raeburn  1710:             unless (($getpropath) || ($getuserdir) ||
1.489.2.28  raeburn  1711:                     ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
                   1712:                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) ||
                   1713:                     (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) {
1.489.2.23  raeburn  1714:                 &Failure($client,"refused\n",$userinput);
                   1715:                 return 1;
                   1716:             }
1.399     raeburn  1717:             if (opendir(LSDIR,$ulsdir)) {
                   1718:                 while ($ulsfn=readdir(LSDIR)) {
                   1719:                     undef($obs);
                   1720:                     undef($rights);
                   1721:                     my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                   1722:                     #We do some obsolete checking here
                   1723:                     if(-e $ulsdir.'/'.$ulsfn.".meta") {
                   1724:                         open(FILE, $ulsdir.'/'.$ulsfn.".meta");
                   1725:                         my @obsolete=<FILE>;
                   1726:                         foreach my $obsolete (@obsolete) {
                   1727:                             if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
                   1728:                             if($obsolete =~ m|(<copyright>)(default)|) {
                   1729:                                 $rights = 1;
                   1730:                             }
                   1731:                         }
                   1732:                     }
                   1733:                     my $tmp = $ulsfn.'&'.join('&',@ulsstats);
                   1734:                     if ($obs    eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
                   1735:                     if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
                   1736:                     $ulsout.= &escape($tmp).':';
                   1737:                 }
                   1738:                 closedir(LSDIR);
                   1739:             }
                   1740:         } else {
1.489.2.23  raeburn  1741:             unless (($getpropath) || ($getuserdir) ||
1.489.2.28  raeburn  1742:                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
                   1743:                     ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) ||
                   1744:                     (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) {
1.489.2.23  raeburn  1745:                 &Failure($client,"refused\n",$userinput);
                   1746:                 return 1;
                   1747:             }
1.399     raeburn  1748:             my @ulsstats=stat($ulsdir);
                   1749:             $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                   1750:         }
                   1751:     } else {
                   1752:         $ulsout='no_such_dir';
1.400     raeburn  1753:     }
                   1754:     if ($ulsout eq '') { $ulsout='empty'; }
                   1755:     &Reply($client, \$ulsout, $userinput); # This supports debug logging.
                   1756:     return 1;
1.399     raeburn  1757: }
                   1758: &register_handler("ls3", \&ls3_handler, 0, 1, 0);
1.280     matthew  1759: 
1.477     raeburn  1760: sub read_lonnet_global {
                   1761:     my ($cmd,$tail,$client) = @_;
                   1762:     my $userinput = "$cmd:$tail";
                   1763:     my $requested = &Apache::lonnet::thaw_unescape($tail);
                   1764:     my $result;
1.480     raeburn  1765:     my %packagevars = (
                   1766:                         spareid => \%Apache::lonnet::spareid,
                   1767:                         perlvar => \%Apache::lonnet::perlvar,
                   1768:                       );
                   1769:     my %limit_to = (
                   1770:                     perlvar => {
                   1771:                                  lonOtherAuthen => 1,
                   1772:                                  lonBalancer    => 1,
                   1773:                                  lonVersion     => 1,
                   1774:                                  lonSysEMail    => 1,
                   1775:                                  lonHostID      => 1,
                   1776:                                  lonRole        => 1,
                   1777:                                  lonDefDomain   => 1,
                   1778:                                  lonLoadLim     => 1,
                   1779:                                  lonUserLoadLim => 1,
                   1780:                                }
                   1781:                   );
1.477     raeburn  1782:     if (ref($requested) eq 'HASH') {
                   1783:         foreach my $what (keys(%{$requested})) {
                   1784:             my $response;
1.480     raeburn  1785:             my $items = {};
                   1786:             if (exists($packagevars{$what})) {
                   1787:                 if (ref($limit_to{$what}) eq 'HASH') {
                   1788:                     foreach my $varname (keys(%{$packagevars{$what}})) {
                   1789:                         if ($limit_to{$what}{$varname}) {
                   1790:                             $items->{$varname} = $packagevars{$what}{$varname};
                   1791:                         }
                   1792:                     }
                   1793:                 } else {
                   1794:                     $items = $packagevars{$what};
1.477     raeburn  1795:                 }
1.480     raeburn  1796:                 if ($what eq 'perlvar') {
                   1797:                     if (!exists($packagevars{$what}{'lonBalancer'})) {
1.489.2.43  raeburn  1798:                         if ($dist =~ /^(centos|rhes|fedora|scientific|oracle|rocky|alma)/) {
1.480     raeburn  1799:                             my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
                   1800:                             if (ref($othervarref) eq 'HASH') {
                   1801:                                 $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
                   1802:                             }
                   1803:                         }
                   1804:                     }
1.477     raeburn  1805:                 }
1.480     raeburn  1806:                 $response = &Apache::lonnet::freeze_escape($items);
1.477     raeburn  1807:             }
1.478     raeburn  1808:             $result .= &escape($what).'='.$response.'&';
1.477     raeburn  1809:         }
                   1810:     }
                   1811:     $result =~ s/\&$//;
                   1812:     &Reply($client,\$result,$userinput);
                   1813:     return 1;
                   1814: }
                   1815: &register_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
                   1816: 
1.479     raeburn  1817: sub server_devalidatecache_handler {
                   1818:     my ($cmd,$tail,$client) = @_;
                   1819:     my $userinput = "$cmd:$tail";
1.489.2.9  raeburn  1820:     my $items = &unescape($tail);
                   1821:     my @cached = split(/\&/,$items);
                   1822:     foreach my $key (@cached) {
                   1823:         if ($key =~ /:/) {
                   1824:             my ($name,$id) = map { &unescape($_); } split(/:/,$key);
                   1825:             &Apache::lonnet::devalidate_cache_new($name,$id);
                   1826:         }
                   1827:     }
1.479     raeburn  1828:     my $result = 'ok';
                   1829:     &Reply($client,\$result,$userinput);
                   1830:     return 1;
                   1831: }
1.481     raeburn  1832: &register_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1.479     raeburn  1833: 
1.410     raeburn  1834: sub server_timezone_handler {
                   1835:     my ($cmd,$tail,$client) = @_;
                   1836:     my $userinput = "$cmd:$tail";
                   1837:     my $timezone;
                   1838:     my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
                   1839:     my $tzfile = '/etc/timezone'; # Debian/Ubuntu
                   1840:     if (-e $clockfile) {
                   1841:         if (open(my $fh,"<$clockfile")) {
                   1842:             while (<$fh>) {
                   1843:                 next if (/^[\#\s]/);
                   1844:                 if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
                   1845:                     $timezone = $1;
                   1846:                     last;
                   1847:                 }
                   1848:             }
                   1849:             close($fh);
                   1850:         }
                   1851:     } elsif (-e $tzfile) {
                   1852:         if (open(my $fh,"<$tzfile")) {
                   1853:             $timezone = <$fh>;
                   1854:             close($fh);
                   1855:             chomp($timezone);
                   1856:             if ($timezone =~ m{^Etc/(\w+)$}) {
                   1857:                 $timezone = $1;
                   1858:             }
                   1859:         }
                   1860:     }
                   1861:     &Reply($client,\$timezone,$userinput); # This supports debug logging.
                   1862:     return 1;
                   1863: }
                   1864: &register_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
                   1865: 
1.413     raeburn  1866: sub server_loncaparev_handler {
                   1867:     my ($cmd,$tail,$client) = @_;
                   1868:     my $userinput = "$cmd:$tail";
                   1869:     &Reply($client,\$perlvar{'lonVersion'},$userinput);
                   1870:     return 1;
                   1871: }
                   1872: &register_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
                   1873: 
1.448     raeburn  1874: sub server_homeID_handler {
                   1875:     my ($cmd,$tail,$client) = @_;
                   1876:     my $userinput = "$cmd:$tail";
                   1877:     &Reply($client,\$perlvar{'lonHostID'},$userinput);
                   1878:     return 1;
                   1879: }
                   1880: &register_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
                   1881: 
1.471     raeburn  1882: sub server_distarch_handler {
                   1883:     my ($cmd,$tail,$client) = @_;
                   1884:     my $userinput = "$cmd:$tail";
                   1885:     my $reply = &distro_and_arch();
                   1886:     &Reply($client,\$reply,$userinput);
                   1887:     return 1;
                   1888: }
                   1889: &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
                   1890: 
1.218     foxr     1891: #   Process a reinit request.  Reinit requests that either
                   1892: #   lonc or lond be reinitialized so that an updated 
                   1893: #   host.tab or domain.tab can be processed.
                   1894: #
                   1895: # Parameters:
                   1896: #      $cmd    - the actual keyword that invoked us.
                   1897: #      $tail   - the tail of the request that invoked us.
                   1898: #      $client - File descriptor connected to the client
                   1899: #  Returns:
                   1900: #      1       - Ok to continue processing.
                   1901: #      0       - Program should exit
                   1902: #  Implicit output:
                   1903: #     a reply is sent to the client.
                   1904: #
                   1905: sub reinit_process_handler {
                   1906:     my ($cmd, $tail, $client) = @_;
                   1907:    
                   1908:     my $userinput = "$cmd:$tail";
                   1909:    
                   1910:     my $cert = &GetCertificate($userinput);
                   1911:     if(&ValidManager($cert)) {
                   1912: 	chomp($userinput);
                   1913: 	my $reply = &ReinitProcess($userinput);
1.387     albertel 1914: 	&Reply( $client,  \$reply, $userinput);
1.218     foxr     1915:     } else {
                   1916: 	&Failure( $client, "refused\n", $userinput);
                   1917:     }
                   1918:     return 1;
                   1919: }
                   1920: &register_handler("reinit", \&reinit_process_handler, 1, 0, 1);
                   1921: 
                   1922: #  Process the editing script for a table edit operation.
                   1923: #  the editing operation must be encrypted and requested by
                   1924: #  a manager host.
                   1925: #
                   1926: # Parameters:
                   1927: #      $cmd    - the actual keyword that invoked us.
                   1928: #      $tail   - the tail of the request that invoked us.
                   1929: #      $client - File descriptor connected to the client
                   1930: #  Returns:
                   1931: #      1       - Ok to continue processing.
                   1932: #      0       - Program should exit
                   1933: #  Implicit output:
                   1934: #     a reply is sent to the client.
                   1935: #
                   1936: sub edit_table_handler {
                   1937:     my ($command, $tail, $client) = @_;
                   1938:    
                   1939:     my $userinput = "$command:$tail";
                   1940: 
                   1941:     my $cert = &GetCertificate($userinput);
                   1942:     if(&ValidManager($cert)) {
                   1943: 	my($filetype, $script) = split(/:/, $tail);
                   1944: 	if (($filetype eq "hosts") || 
                   1945: 	    ($filetype eq "domain")) {
                   1946: 	    if($script ne "") {
                   1947: 		&Reply($client,              # BUGBUG - EditFile
                   1948: 		      &EditFile($userinput), #   could fail.
                   1949: 		      $userinput);
                   1950: 	    } else {
                   1951: 		&Failure($client,"refused\n",$userinput);
                   1952: 	    }
                   1953: 	} else {
                   1954: 	    &Failure($client,"refused\n",$userinput);
                   1955: 	}
                   1956:     } else {
                   1957: 	&Failure($client,"refused\n",$userinput);
                   1958:     }
                   1959:     return 1;
                   1960: }
1.263     albertel 1961: &register_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218     foxr     1962: 
1.220     foxr     1963: #
                   1964: #   Authenticate a user against the LonCAPA authentication
                   1965: #   database.  Note that there are several authentication
                   1966: #   possibilities:
                   1967: #   - unix     - The user can be authenticated against the unix
                   1968: #                password file.
                   1969: #   - internal - The user can be authenticated against a purely 
                   1970: #                internal per user password file.
                   1971: #   - kerberos - The user can be authenticated against either a kerb4 or kerb5
                   1972: #                ticket granting authority.
                   1973: #   - user     - The person tailoring LonCAPA can supply a user authentication
                   1974: #                mechanism that is per system.
                   1975: #
                   1976: # Parameters:
                   1977: #    $cmd      - The command that got us here.
                   1978: #    $tail     - Tail of the command (remaining parameters).
                   1979: #    $client   - File descriptor connected to client.
                   1980: # Returns
                   1981: #     0        - Requested to exit, caller should shut down.
                   1982: #     1        - Continue processing.
                   1983: # Implicit inputs:
                   1984: #    The authentication systems describe above have their own forms of implicit
                   1985: #    input into the authentication process that are described above.
                   1986: #
                   1987: sub authenticate_handler {
                   1988:     my ($cmd, $tail, $client) = @_;
                   1989: 
                   1990:     
                   1991:     #  Regenerate the full input line 
                   1992:     
                   1993:     my $userinput  = $cmd.":".$tail;
                   1994:     
                   1995:     #  udom    - User's domain.
                   1996:     #  uname   - Username.
                   1997:     #  upass   - User's password.
1.396     raeburn  1998:     #  checkdefauth - Pass to validate_user() to try authentication
                   1999:     #                 with default auth type(s) if no user account.
1.447     raeburn  2000:     #  clientcancheckhost - Passed by clients with functionality in lonauth.pm
                   2001:     #                       to check if session can be hosted.
1.220     foxr     2002:     
1.447     raeburn  2003:     my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
1.399     raeburn  2004:     &Debug(" Authenticate domain = $udom, user = $uname, password = $upass,  checkdefauth = $checkdefauth");
1.220     foxr     2005:     chomp($upass);
                   2006:     $upass=&unescape($upass);
                   2007: 
1.396     raeburn  2008:     my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1.220     foxr     2009:     if($pwdcorrect) {
1.447     raeburn  2010:         my $canhost = 1;
                   2011:         unless ($clientcancheckhost) {
1.448     raeburn  2012:             my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
                   2013:             my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1.452     raeburn  2014:             my @intdoms;
                   2015:             my $internet_names = &Apache::lonnet::get_internet_names($clientname);
                   2016:             if (ref($internet_names) eq 'ARRAY') {
                   2017:                 @intdoms = @{$internet_names};
                   2018:             }
1.448     raeburn  2019:             unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1.447     raeburn  2020:                 my ($remote,$hosted);
                   2021:                 my $remotesession = &get_usersession_config($udom,'remotesession');
                   2022:                 if (ref($remotesession) eq 'HASH') {
1.489.2.32  raeburn  2023:                     $remote = $remotesession->{'remote'};
1.447     raeburn  2024:                 }
1.448     raeburn  2025:                 my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
1.447     raeburn  2026:                 if (ref($hostedsession) eq 'HASH') {
                   2027:                     $hosted = $hostedsession->{'hosted'};
                   2028:                 }
1.449     raeburn  2029:                 my $loncaparev = $clientversion;
                   2030:                 if ($loncaparev eq '') {
                   2031:                     $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
                   2032:                 }
1.448     raeburn  2033:                 $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
1.449     raeburn  2034:                                                              $loncaparev,
1.447     raeburn  2035:                                                              $remote,$hosted);
                   2036:             }
                   2037:         }
                   2038:         if ($canhost) {               
                   2039:             &Reply( $client, "authorized\n", $userinput);
                   2040:         } else {
                   2041:             &Reply( $client, "not_allowed_to_host\n", $userinput);
                   2042:         }
1.220     foxr     2043: 	#
                   2044: 	#  Bad credentials: Failed to authorize
                   2045: 	#
                   2046:     } else {
                   2047: 	&Failure( $client, "non_authorized\n", $userinput);
                   2048:     }
                   2049: 
                   2050:     return 1;
                   2051: }
1.263     albertel 2052: &register_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214     foxr     2053: 
1.222     foxr     2054: #
                   2055: #   Change a user's password.  Note that this function is complicated by
                   2056: #   the fact that a user may be authenticated in more than one way:
                   2057: #   At present, we are not able to change the password for all types of
                   2058: #   authentication methods.  Only for:
                   2059: #      unix    - unix password or shadow passoword style authentication.
                   2060: #      local   - Locally written authentication mechanism.
                   2061: #   For now, kerb4 and kerb5 password changes are not supported and result
                   2062: #   in an error.
                   2063: # FUTURE WORK:
                   2064: #    Support kerberos passwd changes?
                   2065: # Parameters:
                   2066: #    $cmd      - The command that got us here.
                   2067: #    $tail     - Tail of the command (remaining parameters).
                   2068: #    $client   - File descriptor connected to client.
                   2069: # Returns
                   2070: #     0        - Requested to exit, caller should shut down.
                   2071: #     1        - Continue processing.
                   2072: # Implicit inputs:
                   2073: #    The authentication systems describe above have their own forms of implicit
                   2074: #    input into the authentication process that are described above.
                   2075: sub change_password_handler {
                   2076:     my ($cmd, $tail, $client) = @_;
                   2077: 
                   2078:     my $userinput = $cmd.":".$tail;           # Reconstruct client's string.
                   2079: 
                   2080:     #
                   2081:     #  udom  - user's domain.
                   2082:     #  uname - Username.
                   2083:     #  upass - Current password.
                   2084:     #  npass - New password.
1.346     raeburn  2085:     #  context - Context in which this was called 
                   2086:     #            (preferences or reset_by_email).
1.428     raeburn  2087:     #  lonhost - HostID of server where request originated 
1.222     foxr     2088:    
1.428     raeburn  2089:     my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1.222     foxr     2090: 
                   2091:     $upass=&unescape($upass);
                   2092:     $npass=&unescape($npass);
                   2093:     &Debug("Trying to change password for $uname");
                   2094: 
                   2095:     # First require that the user can be authenticated with their
1.346     raeburn  2096:     # old password unless context was 'reset_by_email':
                   2097:     
1.428     raeburn  2098:     my ($validated,$failure);
1.346     raeburn  2099:     if ($context eq 'reset_by_email') {
1.428     raeburn  2100:         if ($lonhost eq '') {
                   2101:             $failure = 'invalid_client';
                   2102:         } else {
                   2103:             $validated = 1;
                   2104:         }
1.346     raeburn  2105:     } else {
                   2106:         $validated = &validate_user($udom, $uname, $upass);
                   2107:     }
1.222     foxr     2108:     if($validated) {
                   2109: 	my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.
                   2110: 	my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1.489.2.33  raeburn  2111:         my $notunique;
1.222     foxr     2112: 	if ($howpwd eq 'internal') {
                   2113: 	    &Debug("internal auth");
1.489.2.21  raeburn  2114:             my $ncpass = &hash_passwd($udom,$npass);
1.489.2.33  raeburn  2115:             my (undef,$method,@rest) = split(/!/,$contentpwd);
                   2116:             if ($method eq 'bcrypt') {
                   2117:                 my %passwdconf = &Apache::lonnet::get_passwdconf($udom);
                   2118:                 if (($passwdconf{'numsaved'}) && ($passwdconf{'numsaved'} =~ /^\d+$/)) {
                   2119:                     my @oldpasswds;
                   2120:                     my $userpath = &propath($udom,$uname);
                   2121:                     my $fullpath = $userpath.'/oldpasswds';
                   2122:                     if (-d $userpath) {
                   2123:                         my @oldfiles;
                   2124:                         if (-e $fullpath) {
                   2125:                             if (opendir(my $dir,$fullpath)) {
                   2126:                                 (@oldfiles) = grep(/^\d+$/,readdir($dir));
                   2127:                                 closedir($dir);
                   2128:                             }
                   2129:                             if (@oldfiles) {
                   2130:                                 @oldfiles = sort { $b <=> $a } (@oldfiles);
                   2131:                                 my $numremoved = 0;
                   2132:                                 for (my $i=0; $i<@oldfiles; $i++) {
                   2133:                                     if ($i>=$passwdconf{'numsaved'}) {
                   2134:                                         if (-f "$fullpath/$oldfiles[$i]") {
                   2135:                                             if (unlink("$fullpath/$oldfiles[$i]")) {
                   2136:                                                 $numremoved ++;
                   2137:                                             }
                   2138:                                         }
                   2139:                                     } elsif (open(my $fh,'<',"$fullpath/$oldfiles[$i]")) {
                   2140:                                         while (my $line = <$fh>) {
                   2141:                                             push(@oldpasswds,$line);
                   2142:                                         }
                   2143:                                         close($fh);
                   2144:                                     }
                   2145:                                 }
                   2146:                                 if ($numremoved) {
                   2147:                                     &logthis("unlinked $numremoved old password files for $uname:$udom");
                   2148:                                 }
                   2149:                             }
                   2150:                         }
                   2151:                         push(@oldpasswds,$contentpwd);
                   2152:                         foreach my $item (@oldpasswds) {
                   2153:                             my (undef,$method,@rest) = split(/!/,$item);
                   2154:                             if ($method eq 'bcrypt') {
                   2155:                                 my $result = &hash_passwd($udom,$npass,@rest);
                   2156:                                 if ($result eq $item) {
                   2157:                                     $notunique = 1;
                   2158:                                     last;
                   2159:                                 }
                   2160:                             }
                   2161:                         }
                   2162:                         unless ($notunique) {
                   2163:                             unless (-e $fullpath) {
                   2164:                                 if (&mkpath("$fullpath/")) {
                   2165:                                     chmod(0700,$fullpath);
                   2166:                                 }
                   2167:                             }
                   2168:                             if (-d $fullpath) {
                   2169:                                 my $now = time;
                   2170:                                 if (open(my $fh,'>',"$fullpath/$now")) {
                   2171:                                     print $fh $contentpwd;
                   2172:                                     close($fh);
                   2173:                                     chmod(0400,"$fullpath/$now");
                   2174:                                 }
                   2175:                             }
                   2176:                         }
                   2177:                     }
                   2178:                 }
                   2179:             }
                   2180:             if ($notunique) {
                   2181:                 my $msg="Result of password change for $uname:$udom - password matches one used before";
                   2182:                 if ($lonhost) {
                   2183:                     $msg .= " - request originated from: $lonhost";
                   2184:                 }
                   2185:                 &logthis($msg);
                   2186:                 &Reply($client, "prioruse\n", $userinput);
                   2187: 	    } elsif (&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1.428     raeburn  2188: 		my $msg="Result of password change for $uname: pwchange_success";
                   2189:                 if ($lonhost) {
                   2190:                     $msg .= " - request originated from: $lonhost";
                   2191:                 }
                   2192:                 &logthis($msg);
1.489.2.21  raeburn  2193:                 &update_passwd_history($uname,$udom,$howpwd,$context);
1.222     foxr     2194: 		&Reply($client, "ok\n", $userinput);
                   2195: 	    } else {
                   2196: 		&logthis("Unable to open $uname passwd "               
                   2197: 			 ."to change password");
                   2198: 		&Failure( $client, "non_authorized\n",$userinput);
                   2199: 	    }
1.346     raeburn  2200: 	} elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1.287     foxr     2201: 	    my $result = &change_unix_password($uname, $npass);
1.489.2.21  raeburn  2202:             if ($result eq 'ok') {
                   2203:                 &update_passwd_history($uname,$udom,$howpwd,$context);
                   2204:             }
1.222     foxr     2205: 	    &logthis("Result of password change for $uname: ".
1.287     foxr     2206: 		     $result);
1.387     albertel 2207: 	    &Reply($client, \$result, $userinput);
1.222     foxr     2208: 	} else {
                   2209: 	    # this just means that the current password mode is not
                   2210: 	    # one we know how to change (e.g the kerberos auth modes or
                   2211: 	    # locally written auth handler).
                   2212: 	    #
                   2213: 	    &Failure( $client, "auth_mode_error\n", $userinput);
                   2214: 	}  
1.224     foxr     2215:     } else {
1.428     raeburn  2216: 	if ($failure eq '') {
                   2217: 	    $failure = 'non_authorized';
                   2218: 	}
                   2219: 	&Failure( $client, "$failure\n", $userinput);
1.222     foxr     2220:     }
                   2221: 
                   2222:     return 1;
                   2223: }
1.263     albertel 2224: &register_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222     foxr     2225: 
1.489.2.21  raeburn  2226: sub hash_passwd {
                   2227:     my ($domain,$plainpass,@rest) = @_;
                   2228:     my ($salt,$cost);
                   2229:     if (@rest) {
                   2230:         $cost = $rest[0];
                   2231:         # salt is first 22 characters, base-64 encoded by bcrypt
                   2232:         my $plainsalt = substr($rest[1],0,22);
                   2233:         $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
                   2234:     } else {
1.489.2.26  raeburn  2235:         my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
                   2236:         my $defaultcost = $domdefaults{'intauth_cost'};
1.489.2.21  raeburn  2237:         if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
                   2238:             $cost = 10;
                   2239:         } else {
                   2240:             $cost = $defaultcost;
                   2241:         }
                   2242:         # Generate random 16-octet base64 salt
                   2243:         $salt = "";
                   2244:         $salt .= pack("C", int rand(256)) for 1..16;
                   2245:     }
                   2246:     my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
                   2247:         key_nul => 1,
                   2248:         cost    => $cost,
                   2249:         salt    => $salt,
                   2250:     }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
                   2251: 
                   2252:     my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
                   2253:                 &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
                   2254:                 &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
                   2255:     return $result;
                   2256: }
                   2257: 
1.225     foxr     2258: #
                   2259: #   Create a new user.  User in this case means a lon-capa user.
                   2260: #   The user must either already exist in some authentication realm
                   2261: #   like kerberos or the /etc/passwd.  If not, a user completely local to
                   2262: #   this loncapa system is created.
                   2263: #
                   2264: # Parameters:
                   2265: #    $cmd      - The command that got us here.
                   2266: #    $tail     - Tail of the command (remaining parameters).
                   2267: #    $client   - File descriptor connected to client.
                   2268: # Returns
                   2269: #     0        - Requested to exit, caller should shut down.
                   2270: #     1        - Continue processing.
                   2271: # Implicit inputs:
                   2272: #    The authentication systems describe above have their own forms of implicit
                   2273: #    input into the authentication process that are described above.
                   2274: sub add_user_handler {
                   2275: 
                   2276:     my ($cmd, $tail, $client) = @_;
                   2277: 
                   2278: 
                   2279:     my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
                   2280:     my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
                   2281: 
                   2282:     &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
                   2283: 
                   2284: 
                   2285:     if($udom eq $currentdomainid) { # Reject new users for other domains...
                   2286: 	
                   2287: 	my $oldumask=umask(0077);
                   2288: 	chomp($npass);
                   2289: 	$npass=&unescape($npass);
                   2290: 	my $passfilename  = &password_path($udom, $uname);
                   2291: 	&Debug("Password file created will be:".$passfilename);
                   2292: 	if (-e $passfilename) {
                   2293: 	    &Failure( $client, "already_exists\n", $userinput);
                   2294: 	} else {
                   2295: 	    my $fperror='';
1.264     albertel 2296: 	    if (!&mkpath($passfilename)) {
                   2297: 		$fperror="error: ".($!+0)." mkdir failed while attempting "
                   2298: 		    ."makeuser";
1.225     foxr     2299: 	    }
                   2300: 	    unless ($fperror) {
1.489.2.21  raeburn  2301: 		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
                   2302:                                              $passfilename,'makeuser');
1.390     raeburn  2303: 		&Reply($client,\$result, $userinput);     #BUGBUG - could be fail
1.225     foxr     2304: 	    } else {
1.387     albertel 2305: 		&Failure($client, \$fperror, $userinput);
1.225     foxr     2306: 	    }
                   2307: 	}
                   2308: 	umask($oldumask);
                   2309:     }  else {
                   2310: 	&Failure($client, "not_right_domain\n",
                   2311: 		$userinput);	# Even if we are multihomed.
                   2312:     
                   2313:     }
                   2314:     return 1;
                   2315: 
                   2316: }
                   2317: &register_handler("makeuser", \&add_user_handler, 1, 1, 0);
                   2318: 
                   2319: #
                   2320: #   Change the authentication method of a user.  Note that this may
                   2321: #   also implicitly change the user's password if, for example, the user is
                   2322: #   joining an existing authentication realm.  Known authentication realms at
                   2323: #   this time are:
                   2324: #    internal   - Purely internal password file (only loncapa knows this user)
                   2325: #    local      - Institutionally written authentication module.
                   2326: #    unix       - Unix user (/etc/passwd with or without /etc/shadow).
                   2327: #    kerb4      - kerberos version 4
                   2328: #    kerb5      - kerberos version 5
                   2329: #
                   2330: # Parameters:
                   2331: #    $cmd      - The command that got us here.
                   2332: #    $tail     - Tail of the command (remaining parameters).
                   2333: #    $client   - File descriptor connected to client.
                   2334: # Returns
                   2335: #     0        - Requested to exit, caller should shut down.
                   2336: #     1        - Continue processing.
                   2337: # Implicit inputs:
                   2338: #    The authentication systems describe above have their own forms of implicit
                   2339: #    input into the authentication process that are described above.
1.287     foxr     2340: # NOTE:
                   2341: #   This is also used to change the authentication credential values (e.g. passwd).
                   2342: #   
1.225     foxr     2343: #
                   2344: sub change_authentication_handler {
                   2345: 
                   2346:     my ($cmd, $tail, $client) = @_;
                   2347:    
                   2348:     my $userinput  = "$cmd:$tail";              # Reconstruct user input.
                   2349: 
                   2350:     my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
                   2351:     &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
                   2352:     if ($udom ne $currentdomainid) {
                   2353: 	&Failure( $client, "not_right_domain\n", $client);
                   2354:     } else {
                   2355: 	
                   2356: 	chomp($npass);
                   2357: 	
                   2358: 	$npass=&unescape($npass);
1.261     foxr     2359: 	my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225     foxr     2360: 	my $passfilename = &password_path($udom, $uname);
                   2361: 	if ($passfilename) {	# Not allowed to create a new user!!
1.287     foxr     2362: 	    # If just changing the unix passwd. need to arrange to run
1.489.2.8  raeburn  2363: 	    # passwd since otherwise make_passwd_file will fail as 
                   2364: 	    # creation of unix authenticated users is no longer supported
                   2365:             # except from the command line, when running make_domain_coordinator.pl
1.287     foxr     2366: 
                   2367: 	    if(($oldauth =~/^unix/) && ($umode eq "unix")) {
                   2368: 		my $result = &change_unix_password($uname, $npass);
                   2369: 		&logthis("Result of password change for $uname: ".$result);
                   2370: 		if ($result eq "ok") {
1.489.2.21  raeburn  2371:                     &update_passwd_history($uname,$udom,$umode,'changeuserauth');
1.390     raeburn  2372: 		    &Reply($client, \$result);
1.288     albertel 2373: 		} else {
1.387     albertel 2374: 		    &Failure($client, \$result);
1.287     foxr     2375: 		}
1.288     albertel 2376: 	    } else {
1.489.2.21  raeburn  2377: 		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
                   2378:                                              $passfilename,'changeuserauth');
1.287     foxr     2379: 		#
                   2380: 		#  If the current auth mode is internal, and the old auth mode was
                   2381: 		#  unix, or krb*,  and the user is an author for this domain,
                   2382: 		#  re-run manage_permissions for that role in order to be able
                   2383: 		#  to take ownership of the construction space back to www:www
                   2384: 		#
1.489.2.8  raeburn  2385: 
                   2386: 
1.387     albertel 2387: 		&Reply($client, \$result, $userinput);
1.261     foxr     2388: 	    }
                   2389: 	       
                   2390: 
1.225     foxr     2391: 	} else {	       
1.251     foxr     2392: 	    &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225     foxr     2393: 	}
                   2394:     }
                   2395:     return 1;
                   2396: }
                   2397: &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
                   2398: 
1.489.2.21  raeburn  2399: sub update_passwd_history {
                   2400:     my ($uname,$udom,$umode,$context) = @_;
                   2401:     my $proname=&propath($udom,$uname);
                   2402:     my $now = time;
                   2403:     if (open(my $fh,">>$proname/passwd.log")) {
                   2404:         print $fh "$now:$umode:$context\n";
                   2405:         close($fh);
                   2406:     }
                   2407:     return;
                   2408: }
                   2409: 
1.489.2.43.2.  (raeburn 2410:): sub inst_unamemap_check {
                   2411:):     my ($cmd, $tail, $client)   = @_;
                   2412:):     my $userinput               = "$cmd:$tail";
                   2413:):     my %rulecheck;
                   2414:):     my $outcome;
                   2415:):     my ($udom,$uname,@rules) = split(/:/,$tail);
                   2416:):     $udom = &unescape($udom);
                   2417:):     $uname = &unescape($uname);
                   2418:):     @rules = map {&unescape($_);} (@rules);
                   2419:):     eval {
                   2420:):         local($SIG{__DIE__})='DEFAULT';
                   2421:):         $outcome = &localenroll::unamemap_check($udom,$uname,\@rules,\%rulecheck);
                   2422:):     };
                   2423:):     if (!$@) {
                   2424:):         if ($outcome eq 'ok') {
                   2425:):             my $result='';
                   2426:):             foreach my $key (keys(%rulecheck)) {
                   2427:):                 $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
                   2428:):             }
                   2429:):             &Reply($client,\$result,$userinput);
                   2430:):         } else {
                   2431:):             &Reply($client,"error\n", $userinput);
                   2432:):         }
                   2433:):     } else {
                   2434:):         &Failure($client,"unknown_cmd\n",$userinput);
                   2435:):     }
                   2436:): }
                   2437:): &register_handler("instunamemapcheck",\&inst_unamemap_check,0,1,0);
                   2438:): 
                   2439:): 
1.225     foxr     2440: #
                   2441: #   Determines if this is the home server for a user.  The home server
                   2442: #   for a user will have his/her lon-capa passwd file.  Therefore all we need
                   2443: #   to do is determine if this file exists.
                   2444: #
                   2445: # Parameters:
                   2446: #    $cmd      - The command that got us here.
                   2447: #    $tail     - Tail of the command (remaining parameters).
                   2448: #    $client   - File descriptor connected to client.
                   2449: # Returns
                   2450: #     0        - Requested to exit, caller should shut down.
                   2451: #     1        - Continue processing.
                   2452: # Implicit inputs:
                   2453: #    The authentication systems describe above have their own forms of implicit
                   2454: #    input into the authentication process that are described above.
                   2455: #
                   2456: sub is_home_handler {
                   2457:     my ($cmd, $tail, $client) = @_;
                   2458:    
                   2459:     my $userinput  = "$cmd:$tail";
                   2460:    
                   2461:     my ($udom,$uname)=split(/:/,$tail);
                   2462:     chomp($uname);
                   2463:     my $passfile = &password_filename($udom, $uname);
                   2464:     if($passfile) {
                   2465: 	&Reply( $client, "found\n", $userinput);
                   2466:     } else {
                   2467: 	&Failure($client, "not_found\n", $userinput);
                   2468:     }
                   2469:     return 1;
                   2470: }
                   2471: &register_handler("home", \&is_home_handler, 0,1,0);
                   2472: 
                   2473: #
1.434     www      2474: #   Process an update request for a resource.
                   2475: #   A resource has been modified that we hold a subscription to.
1.225     foxr     2476: #   If the resource is not local, then we must update, or at least invalidate our
                   2477: #   cached copy of the resource. 
                   2478: # Parameters:
                   2479: #    $cmd      - The command that got us here.
                   2480: #    $tail     - Tail of the command (remaining parameters).
                   2481: #    $client   - File descriptor connected to client.
                   2482: # Returns
                   2483: #     0        - Requested to exit, caller should shut down.
                   2484: #     1        - Continue processing.
                   2485: # Implicit inputs:
                   2486: #    The authentication systems describe above have their own forms of implicit
                   2487: #    input into the authentication process that are described above.
                   2488: #
                   2489: sub update_resource_handler {
                   2490: 
                   2491:     my ($cmd, $tail, $client) = @_;
                   2492:    
                   2493:     my $userinput = "$cmd:$tail";
                   2494:    
                   2495:     my $fname= $tail;		# This allows interactive testing
                   2496: 
                   2497: 
                   2498:     my $ownership=ishome($fname);
                   2499:     if ($ownership eq 'not_owner') {
                   2500: 	if (-e $fname) {
1.434     www      2501:             # Delete preview file, if exists
                   2502:             unlink("$fname.tmp");
                   2503:             # Get usage stats
1.225     foxr     2504: 	    my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
                   2505: 		$atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
                   2506: 	    my $now=time;
                   2507: 	    my $since=$now-$atime;
1.434     www      2508:             # If the file has not been used within lonExpire seconds,
                   2509:             # unsubscribe from it and delete local copy
1.225     foxr     2510: 	    if ($since>$perlvar{'lonExpire'}) {
1.365     albertel 2511: 		my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
1.308     albertel 2512: 		&devalidate_meta_cache($fname);
1.225     foxr     2513: 		unlink("$fname");
1.334     albertel 2514: 		unlink("$fname.meta");
1.225     foxr     2515: 	    } else {
1.434     www      2516:             # Yes, this is in active use. Get a fresh copy. Since it might be in
                   2517:             # very active use and huge (like a movie), copy it to "in.transfer" filename first.
1.225     foxr     2518: 		my $transname="$fname.in.transfer";
1.365     albertel 2519: 		my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
1.225     foxr     2520: 		my $response;
1.455     www      2521: # FIXME: cannot replicate files that take more than two minutes to transfer?
                   2522: #		alarm(120);
                   2523: # FIXME: this should use the LWP mechanism, not internal alarms.
                   2524:                 alarm(1200);
1.225     foxr     2525: 		{
                   2526: 		    my $ua=new LWP::UserAgent;
                   2527: 		    my $request=new HTTP::Request('GET',"$remoteurl");
                   2528: 		    $response=$ua->request($request,$transname);
                   2529: 		}
                   2530: 		alarm(0);
                   2531: 		if ($response->is_error()) {
1.489.2.30  raeburn  2532:                     my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
                   2533:                     &devalidate_meta_cache($fname);
                   2534:                     if (-e $transname) {
                   2535:                         unlink($transname);
                   2536:                     }
                   2537:                     unlink($fname);
1.225     foxr     2538: 		    my $message=$response->status_line;
                   2539: 		    &logthis("LWP GET: $message for $fname ($remoteurl)");
                   2540: 		} else {
                   2541: 		    if ($remoteurl!~/\.meta$/) {
1.455     www      2542: # FIXME: isn't there an internal LWP mechanism for this?
1.225     foxr     2543: 			alarm(120);
                   2544: 			{
                   2545: 			    my $ua=new LWP::UserAgent;
                   2546: 			    my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
                   2547: 			    my $mresponse=$ua->request($mrequest,$fname.'.meta');
                   2548: 			    if ($mresponse->is_error()) {
                   2549: 				unlink($fname.'.meta');
                   2550: 			    }
                   2551: 			}
                   2552: 			alarm(0);
                   2553: 		    }
1.434     www      2554:                     # we successfully transfered, copy file over to real name
1.225     foxr     2555: 		    rename($transname,$fname);
1.308     albertel 2556: 		    &devalidate_meta_cache($fname);
1.225     foxr     2557: 		}
                   2558: 	    }
                   2559: 	    &Reply( $client, "ok\n", $userinput);
                   2560: 	} else {
                   2561: 	    &Failure($client, "not_found\n", $userinput);
                   2562: 	}
                   2563:     } else {
                   2564: 	&Failure($client, "rejected\n", $userinput);
                   2565:     }
                   2566:     return 1;
                   2567: }
                   2568: &register_handler("update", \&update_resource_handler, 0 ,1, 0);
                   2569: 
1.308     albertel 2570: sub devalidate_meta_cache {
                   2571:     my ($url) = @_;
                   2572:     use Cache::Memcached;
                   2573:     my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1.365     albertel 2574:     $url = &Apache::lonnet::declutter($url);
1.308     albertel 2575:     $url =~ s-\.meta$--;
                   2576:     my $id = &escape('meta:'.$url);
                   2577:     $memcache->delete($id);
                   2578: }
                   2579: 
1.225     foxr     2580: #
1.226     foxr     2581: #   Fetch a user file from a remote server to the user's home directory
                   2582: #   userfiles subdir.
1.225     foxr     2583: # Parameters:
                   2584: #    $cmd      - The command that got us here.
                   2585: #    $tail     - Tail of the command (remaining parameters).
                   2586: #    $client   - File descriptor connected to client.
                   2587: # Returns
                   2588: #     0        - Requested to exit, caller should shut down.
                   2589: #     1        - Continue processing.
                   2590: #
                   2591: sub fetch_user_file_handler {
                   2592: 
                   2593:     my ($cmd, $tail, $client) = @_;
                   2594: 
                   2595:     my $userinput = "$cmd:$tail";
                   2596:     my $fname           = $tail;
1.232     foxr     2597:     my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225     foxr     2598:     my $udir=&propath($udom,$uname).'/userfiles';
                   2599:     unless (-e $udir) {
                   2600: 	mkdir($udir,0770); 
                   2601:     }
1.232     foxr     2602:     Debug("fetch user file for $fname");
1.225     foxr     2603:     if (-e $udir) {
                   2604: 	$ufile=~s/^[\.\~]+//;
1.232     foxr     2605: 
                   2606: 	# IF necessary, create the path right down to the file.
                   2607: 	# Note that any regular files in the way of this path are
                   2608: 	# wiped out to deal with some earlier folly of mine.
                   2609: 
1.267     raeburn  2610: 	if (!&mkpath($udir.'/'.$ufile)) {
1.264     albertel 2611: 	    &Failure($client, "unable_to_create\n", $userinput);	    
1.232     foxr     2612: 	}
                   2613: 
1.225     foxr     2614: 	my $destname=$udir.'/'.$ufile;
                   2615: 	my $transname=$udir.'/'.$ufile.'.in.transit';
1.476     raeburn  2616:         my $clientprotocol=$Apache::lonnet::protocol{$clientname};
                   2617:         $clientprotocol = 'http' if ($clientprotocol ne 'https');
1.486     raeburn  2618: 	my $clienthost = &Apache::lonnet::hostname($clientname);
                   2619: 	my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
1.225     foxr     2620: 	my $response;
1.232     foxr     2621: 	Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225     foxr     2622: 	alarm(120);
                   2623: 	{
                   2624: 	    my $ua=new LWP::UserAgent;
                   2625: 	    my $request=new HTTP::Request('GET',"$remoteurl");
                   2626: 	    $response=$ua->request($request,$transname);
                   2627: 	}
                   2628: 	alarm(0);
                   2629: 	if ($response->is_error()) {
                   2630: 	    unlink($transname);
                   2631: 	    my $message=$response->status_line;
                   2632: 	    &logthis("LWP GET: $message for $fname ($remoteurl)");
                   2633: 	    &Failure($client, "failed\n", $userinput);
                   2634: 	} else {
1.232     foxr     2635: 	    Debug("Renaming $transname to $destname");
1.225     foxr     2636: 	    if (!rename($transname,$destname)) {
                   2637: 		&logthis("Unable to move $transname to $destname");
                   2638: 		unlink($transname);
                   2639: 		&Failure($client, "failed\n", $userinput);
                   2640: 	    } else {
1.489.2.2  raeburn  2641:                 if ($fname =~ /^default.+\.(page|sequence)$/) {
                   2642:                     my ($major,$minor) = split(/\./,$clientversion);
                   2643:                     if (($major < 2) || ($major == 2 && $minor < 11)) {
                   2644:                         my $now = time;
                   2645:                         &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
                   2646:                         my $key = &escape('internal.contentchange');
                   2647:                         my $what = "$key=$now";
                   2648:                         my $hashref = &tie_user_hash($udom,$uname,'environment',
                   2649:                                                      &GDBM_WRCREAT(),"P",$what);
                   2650:                         if ($hashref) {
                   2651:                             $hashref->{$key}=$now;
                   2652:                             if (!&untie_user_hash($hashref)) {
                   2653:                                 &logthis("error: ".($!+0)." untie (GDBM) failed ".
                   2654:                                          "when updating internal.contentchange");
                   2655:                             }
                   2656:                         }
                   2657:                     }
                   2658:                 }
1.225     foxr     2659: 		&Reply($client, "ok\n", $userinput);
                   2660: 	    }
                   2661: 	}   
                   2662:     } else {
                   2663: 	&Failure($client, "not_home\n", $userinput);
                   2664:     }
                   2665:     return 1;
                   2666: }
                   2667: &register_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
                   2668: 
1.226     foxr     2669: #
                   2670: #   Remove a file from a user's home directory userfiles subdirectory.
                   2671: # Parameters:
                   2672: #    cmd   - the Lond request keyword that got us here.
                   2673: #    tail  - the part of the command past the keyword.
                   2674: #    client- File descriptor connected with the client.
                   2675: #
                   2676: # Returns:
                   2677: #    1    - Continue processing.
                   2678: sub remove_user_file_handler {
                   2679:     my ($cmd, $tail, $client) = @_;
                   2680: 
                   2681:     my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
                   2682: 
                   2683:     my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
                   2684:     if ($ufile =~m|/\.\./|) {
                   2685: 	# any files paths with /../ in them refuse 
                   2686: 	# to deal with
                   2687: 	&Failure($client, "refused\n", "$cmd:$tail");
                   2688:     } else {
                   2689: 	my $udir = &propath($udom,$uname);
                   2690: 	if (-e $udir) {
                   2691: 	    my $file=$udir.'/userfiles/'.$ufile;
                   2692: 	    if (-e $file) {
1.253     foxr     2693: 		#
                   2694: 		#   If the file is a regular file unlink is fine...
1.489.2.19  raeburn  2695: 		#   However it's possible the client wants a dir
                   2696: 		#   removed, in which case rmdir is more appropriate
                   2697: 	        #   Note: rmdir will only remove an empty directory.
1.253     foxr     2698: 		#
1.240     banghart 2699: 	        if (-f $file){
1.241     albertel 2700: 		    unlink($file);
1.489.2.19  raeburn  2701:                     # for html files remove the associated .bak file
                   2702:                     # which may have been created by the editor.
                   2703:                     if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
                   2704:                         my $path = $1;
                   2705:                         if (-e $file.'.bak') {
                   2706:                             unlink($file.'.bak');
                   2707:                         }
                   2708:                     }
1.241     albertel 2709: 		} elsif(-d $file) {
                   2710: 		    rmdir($file);
1.240     banghart 2711: 		}
1.226     foxr     2712: 		if (-e $file) {
1.253     foxr     2713: 		    #  File is still there after we deleted it ?!?
                   2714: 
1.226     foxr     2715: 		    &Failure($client, "failed\n", "$cmd:$tail");
                   2716: 		} else {
                   2717: 		    &Reply($client, "ok\n", "$cmd:$tail");
                   2718: 		}
                   2719: 	    } else {
                   2720: 		&Failure($client, "not_found\n", "$cmd:$tail");
                   2721: 	    }
                   2722: 	} else {
                   2723: 	    &Failure($client, "not_home\n", "$cmd:$tail");
                   2724: 	}
                   2725:     }
                   2726:     return 1;
                   2727: }
                   2728: &register_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
                   2729: 
1.236     albertel 2730: #
                   2731: #   make a directory in a user's home directory userfiles subdirectory.
                   2732: # Parameters:
                   2733: #    cmd   - the Lond request keyword that got us here.
                   2734: #    tail  - the part of the command past the keyword.
                   2735: #    client- File descriptor connected with the client.
                   2736: #
                   2737: # Returns:
                   2738: #    1    - Continue processing.
                   2739: sub mkdir_user_file_handler {
                   2740:     my ($cmd, $tail, $client) = @_;
                   2741: 
                   2742:     my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
                   2743:     $dir=&unescape($dir);
                   2744:     my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
                   2745:     if ($ufile =~m|/\.\./|) {
                   2746: 	# any files paths with /../ in them refuse 
                   2747: 	# to deal with
                   2748: 	&Failure($client, "refused\n", "$cmd:$tail");
                   2749:     } else {
                   2750: 	my $udir = &propath($udom,$uname);
                   2751: 	if (-e $udir) {
1.264     albertel 2752: 	    my $newdir=$udir.'/userfiles/'.$ufile.'/';
                   2753: 	    if (!&mkpath($newdir)) {
                   2754: 		&Failure($client, "failed\n", "$cmd:$tail");
1.236     albertel 2755: 	    }
1.264     albertel 2756: 	    &Reply($client, "ok\n", "$cmd:$tail");
1.236     albertel 2757: 	} else {
                   2758: 	    &Failure($client, "not_home\n", "$cmd:$tail");
                   2759: 	}
                   2760:     }
                   2761:     return 1;
                   2762: }
                   2763: &register_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
                   2764: 
1.237     albertel 2765: #
                   2766: #   rename a file in a user's home directory userfiles subdirectory.
                   2767: # Parameters:
                   2768: #    cmd   - the Lond request keyword that got us here.
                   2769: #    tail  - the part of the command past the keyword.
                   2770: #    client- File descriptor connected with the client.
                   2771: #
                   2772: # Returns:
                   2773: #    1    - Continue processing.
                   2774: sub rename_user_file_handler {
                   2775:     my ($cmd, $tail, $client) = @_;
                   2776: 
                   2777:     my ($udom,$uname,$old,$new) = split(/:/, $tail);
                   2778:     $old=&unescape($old);
                   2779:     $new=&unescape($new);
                   2780:     if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
                   2781: 	# any files paths with /../ in them refuse to deal with
                   2782: 	&Failure($client, "refused\n", "$cmd:$tail");
                   2783:     } else {
                   2784: 	my $udir = &propath($udom,$uname);
                   2785: 	if (-e $udir) {
                   2786: 	    my $oldfile=$udir.'/userfiles/'.$old;
                   2787: 	    my $newfile=$udir.'/userfiles/'.$new;
                   2788: 	    if (-e $newfile) {
                   2789: 		&Failure($client, "exists\n", "$cmd:$tail");
                   2790: 	    } elsif (! -e $oldfile) {
                   2791: 		&Failure($client, "not_found\n", "$cmd:$tail");
                   2792: 	    } else {
                   2793: 		if (!rename($oldfile,$newfile)) {
                   2794: 		    &Failure($client, "failed\n", "$cmd:$tail");
                   2795: 		} else {
                   2796: 		    &Reply($client, "ok\n", "$cmd:$tail");
                   2797: 		}
                   2798: 	    }
                   2799: 	} else {
                   2800: 	    &Failure($client, "not_home\n", "$cmd:$tail");
                   2801: 	}
                   2802:     }
                   2803:     return 1;
                   2804: }
                   2805: &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
                   2806: 
1.227     foxr     2807: #
1.382     albertel 2808: #  Checks if the specified user has an active session on the server
                   2809: #  return ok if so, not_found if not
                   2810: #
                   2811: # Parameters:
                   2812: #   cmd      - The request keyword that dispatched to tus.
                   2813: #   tail     - The tail of the request (colon separated parameters).
                   2814: #   client   - Filehandle open on the client.
                   2815: # Return:
                   2816: #    1.
                   2817: sub user_has_session_handler {
                   2818:     my ($cmd, $tail, $client) = @_;
                   2819: 
                   2820:     my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
                   2821:     
                   2822:     opendir(DIR,$perlvar{'lonIDsDir'});
                   2823:     my $filename;
                   2824:     while ($filename=readdir(DIR)) {
                   2825: 	last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
                   2826:     }
                   2827:     if ($filename) {
                   2828: 	&Reply($client, "ok\n", "$cmd:$tail");
                   2829:     } else {
                   2830: 	&Failure($client, "not_found\n", "$cmd:$tail");
                   2831:     }
                   2832:     return 1;
                   2833: 
                   2834: }
                   2835: &register_handler("userhassession", \&user_has_session_handler, 0,1,0);
                   2836: 
1.489.2.43.2.  (raeburn 2837:): sub del_usersession_handler {
                   2838:):     my ($cmd, $tail, $client) = @_;
                   2839:): 
                   2840:):     my $result;
                   2841:):     my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
                   2842:):     if (($udom =~ /^$LONCAPA::match_domain$/) && ($uname =~ /^$LONCAPA::match_username$/)) {
                   2843:):         my $lonidsdir = $perlvar{'lonIDsDir'};
                   2844:):         if (-d $lonidsdir) {
                   2845:):             if (opendir(DIR,$lonidsdir)) {
                   2846:):                 my $filename;
                   2847:):                 while ($filename=readdir(DIR)) {
                   2848:):                     if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/) {
                   2849:):                         if (tie(my %oldenv,'GDBM_File',"$lonidsdir/$filename",
                   2850:):                                 &GDBM_READER(),0640)) {
                   2851:):                             my $linkedfile;
                   2852:):                             if (exists($oldenv{'user.linkedenv'})) {
                   2853:):                                 $linkedfile = $oldenv{'user.linkedenv'};
                   2854:):                             }
                   2855:):                             untie(%oldenv);
                   2856:):                             $result = unlink("$lonidsdir/$filename");
                   2857:):                             if ($result) {
                   2858:):                                 if ($linkedfile =~ /^[a-f0-9]+_linked$/) {
                   2859:):                                     if (-l "$lonidsdir/$linkedfile.id") {
                   2860:):                                         unlink("$lonidsdir/$linkedfile.id");
                   2861:):                                     }
                   2862:):                                 }
                   2863:):                             }
                   2864:):                         } else {
                   2865:):                             $result = unlink("$lonidsdir/$filename");
                   2866:):                         }
                   2867:):                         last;
                   2868:):                     }
                   2869:):                 }
                   2870:):             }
                   2871:):         }
                   2872:):         if ($result == 1) {
                   2873:):             &Reply($client, "$result\n", "$cmd:$tail");
                   2874:):         } else {
                   2875:):             &Reply($client, "not_found\n", "$cmd:$tail");
                   2876:):         }
                   2877:):     } else {
                   2878:):         &Failure($client, "invalid_user\n", "$cmd:$tail");
                   2879:):     }
                   2880:):     return 1;
                   2881:): }
                   2882:): 
                   2883:): &register_handler("delusersession", \&del_usersession_handler, 0,1,0);
                   2884:): 
1.382     albertel 2885: #
1.263     albertel 2886: #  Authenticate access to a user file by checking that the token the user's 
                   2887: #  passed also exists in their session file
1.227     foxr     2888: #
                   2889: # Parameters:
                   2890: #   cmd      - The request keyword that dispatched to tus.
                   2891: #   tail     - The tail of the request (colon separated parameters).
                   2892: #   client   - Filehandle open on the client.
                   2893: # Return:
                   2894: #    1.
                   2895: sub token_auth_user_file_handler {
                   2896:     my ($cmd, $tail, $client) = @_;
                   2897: 
                   2898:     my ($fname, $session) = split(/:/, $tail);
                   2899:     
                   2900:     chomp($session);
1.393     raeburn  2901:     my $reply="non_auth";
1.343     albertel 2902:     my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
                   2903:     if (open(ENVIN,"$file")) {
1.332     albertel 2904: 	flock(ENVIN,LOCK_SH);
1.343     albertel 2905: 	tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
                   2906: 	if (exists($disk_env{"userfile.$fname"})) {
1.393     raeburn  2907: 	    $reply="ok";
1.343     albertel 2908: 	} else {
                   2909: 	    foreach my $envname (keys(%disk_env)) {
                   2910: 		if ($envname=~ m|^userfile\.\Q$fname\E|) {
1.393     raeburn  2911: 		    $reply="ok";
1.343     albertel 2912: 		    last;
                   2913: 		}
                   2914: 	    }
1.227     foxr     2915: 	}
1.343     albertel 2916: 	untie(%disk_env);
1.227     foxr     2917: 	close(ENVIN);
1.387     albertel 2918: 	&Reply($client, \$reply, "$cmd:$tail");
1.227     foxr     2919:     } else {
                   2920: 	&Failure($client, "invalid_token\n", "$cmd:$tail");
                   2921:     }
                   2922:     return 1;
                   2923: 
                   2924: }
                   2925: &register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229     foxr     2926: 
                   2927: #
                   2928: #   Unsubscribe from a resource.
                   2929: #
                   2930: # Parameters:
                   2931: #    $cmd      - The command that got us here.
                   2932: #    $tail     - Tail of the command (remaining parameters).
                   2933: #    $client   - File descriptor connected to client.
                   2934: # Returns
                   2935: #     0        - Requested to exit, caller should shut down.
                   2936: #     1        - Continue processing.
                   2937: #
                   2938: sub unsubscribe_handler {
                   2939:     my ($cmd, $tail, $client) = @_;
                   2940: 
                   2941:     my $userinput= "$cmd:$tail";
                   2942:     
                   2943:     my ($fname) = split(/:/,$tail); # Split in case there's extrs.
                   2944: 
                   2945:     &Debug("Unsubscribing $fname");
                   2946:     if (-e $fname) {
                   2947: 	&Debug("Exists");
                   2948: 	&Reply($client, &unsub($fname,$clientip), $userinput);
                   2949:     } else {
                   2950: 	&Failure($client, "not_found\n", $userinput);
                   2951:     }
                   2952:     return 1;
                   2953: }
                   2954: &register_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263     albertel 2955: 
1.230     foxr     2956: #   Subscribe to a resource
                   2957: #
                   2958: # Parameters:
                   2959: #    $cmd      - The command that got us here.
                   2960: #    $tail     - Tail of the command (remaining parameters).
                   2961: #    $client   - File descriptor connected to client.
                   2962: # Returns
                   2963: #     0        - Requested to exit, caller should shut down.
                   2964: #     1        - Continue processing.
                   2965: #
                   2966: sub subscribe_handler {
                   2967:     my ($cmd, $tail, $client)= @_;
                   2968: 
                   2969:     my $userinput  = "$cmd:$tail";
                   2970: 
                   2971:     &Reply( $client, &subscribe($userinput,$clientip), $userinput);
                   2972: 
                   2973:     return 1;
                   2974: }
                   2975: &register_handler("sub", \&subscribe_handler, 0, 1, 0);
                   2976: 
                   2977: #
1.379     albertel 2978: #   Determine the latest version of a resource (it looks for the highest
                   2979: #   past version and then returns that +1)
1.230     foxr     2980: #
                   2981: # Parameters:
                   2982: #    $cmd      - The command that got us here.
                   2983: #    $tail     - Tail of the command (remaining parameters).
1.379     albertel 2984: #                 (Should consist of an absolute path to a file)
1.230     foxr     2985: #    $client   - File descriptor connected to client.
                   2986: # Returns
                   2987: #     0        - Requested to exit, caller should shut down.
                   2988: #     1        - Continue processing.
                   2989: #
                   2990: sub current_version_handler {
                   2991:     my ($cmd, $tail, $client) = @_;
                   2992: 
                   2993:     my $userinput= "$cmd:$tail";
                   2994:    
                   2995:     my $fname   = $tail;
                   2996:     &Reply( $client, &currentversion($fname)."\n", $userinput);
                   2997:     return 1;
                   2998: 
                   2999: }
                   3000: &register_handler("currentversion", \&current_version_handler, 0, 1, 0);
                   3001: 
                   3002: #  Make an entry in a user's activity log.
                   3003: #
                   3004: # Parameters:
                   3005: #    $cmd      - The command that got us here.
                   3006: #    $tail     - Tail of the command (remaining parameters).
                   3007: #    $client   - File descriptor connected to client.
                   3008: # Returns
                   3009: #     0        - Requested to exit, caller should shut down.
                   3010: #     1        - Continue processing.
                   3011: #
                   3012: sub activity_log_handler {
                   3013:     my ($cmd, $tail, $client) = @_;
                   3014: 
                   3015: 
                   3016:     my $userinput= "$cmd:$tail";
                   3017: 
                   3018:     my ($udom,$uname,$what)=split(/:/,$tail);
                   3019:     chomp($what);
                   3020:     my $proname=&propath($udom,$uname);
                   3021:     my $now=time;
                   3022:     my $hfh;
                   3023:     if ($hfh=IO::File->new(">>$proname/activity.log")) { 
                   3024: 	print $hfh "$now:$clientname:$what\n";
                   3025: 	&Reply( $client, "ok\n", $userinput); 
                   3026:     } else {
                   3027: 	&Failure($client, "error: ".($!+0)." IO::File->new Failed "
                   3028: 		 ."while attempting log\n", 
                   3029: 		 $userinput);
                   3030:     }
                   3031: 
                   3032:     return 1;
                   3033: }
1.263     albertel 3034: &register_handler("log", \&activity_log_handler, 0, 1, 0);
1.230     foxr     3035: 
                   3036: #
                   3037: #   Put a namespace entry in a user profile hash.
                   3038: #   My druthers would be for this to be an encrypted interaction too.
                   3039: #   anything that might be an inadvertent covert channel about either
                   3040: #   user authentication or user personal information....
                   3041: #
                   3042: # Parameters:
                   3043: #    $cmd      - The command that got us here.
                   3044: #    $tail     - Tail of the command (remaining parameters).
                   3045: #    $client   - File descriptor connected to client.
                   3046: # Returns
                   3047: #     0        - Requested to exit, caller should shut down.
                   3048: #     1        - Continue processing.
                   3049: #
                   3050: sub put_user_profile_entry {
                   3051:     my ($cmd, $tail, $client)  = @_;
1.229     foxr     3052: 
1.230     foxr     3053:     my $userinput = "$cmd:$tail";
                   3054:     
1.242     raeburn  3055:     my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230     foxr     3056:     if ($namespace ne 'roles') {
                   3057: 	chomp($what);
                   3058: 	my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   3059: 				  &GDBM_WRCREAT(),"P",$what);
                   3060: 	if($hashref) {
                   3061: 	    my @pairs=split(/\&/,$what);
                   3062: 	    foreach my $pair (@pairs) {
                   3063: 		my ($key,$value)=split(/=/,$pair);
                   3064: 		$hashref->{$key}=$value;
                   3065: 	    }
1.311     albertel 3066: 	    if (&untie_user_hash($hashref)) {
1.230     foxr     3067: 		&Reply( $client, "ok\n", $userinput);
                   3068: 	    } else {
                   3069: 		&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
                   3070: 			"while attempting put\n", 
                   3071: 			$userinput);
                   3072: 	    }
                   3073: 	} else {
1.316     albertel 3074: 	    &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230     foxr     3075: 		     "while attempting put\n", $userinput);
                   3076: 	}
                   3077:     } else {
                   3078:         &Failure( $client, "refused\n", $userinput);
                   3079:     }
                   3080:     
                   3081:     return 1;
                   3082: }
                   3083: &register_handler("put", \&put_user_profile_entry, 0, 1, 0);
                   3084: 
1.283     albertel 3085: #   Put a piece of new data in hash, returns error if entry already exists
                   3086: # Parameters:
                   3087: #    $cmd      - The command that got us here.
                   3088: #    $tail     - Tail of the command (remaining parameters).
                   3089: #    $client   - File descriptor connected to client.
                   3090: # Returns
                   3091: #     0        - Requested to exit, caller should shut down.
                   3092: #     1        - Continue processing.
                   3093: #
                   3094: sub newput_user_profile_entry {
                   3095:     my ($cmd, $tail, $client)  = @_;
                   3096: 
                   3097:     my $userinput = "$cmd:$tail";
                   3098: 
                   3099:     my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
                   3100:     if ($namespace eq 'roles') {
                   3101:         &Failure( $client, "refused\n", $userinput);
                   3102: 	return 1;
                   3103:     }
                   3104: 
                   3105:     chomp($what);
                   3106: 
                   3107:     my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   3108: 				 &GDBM_WRCREAT(),"N",$what);
                   3109:     if(!$hashref) {
1.316     albertel 3110: 	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283     albertel 3111: 		  "while attempting put\n", $userinput);
                   3112: 	return 1;
                   3113:     }
                   3114: 
                   3115:     my @pairs=split(/\&/,$what);
                   3116:     foreach my $pair (@pairs) {
                   3117: 	my ($key,$value)=split(/=/,$pair);
                   3118: 	if (exists($hashref->{$key})) {
1.489.2.17  raeburn  3119:             if (!&untie_user_hash($hashref)) {
                   3120:                 &logthis("error: ".($!+0)." untie (GDBM) failed ".
                   3121:                          "while attempting newput - early out as key exists");
                   3122:             }
1.283     albertel 3123: 	    &Failure($client, "key_exists: ".$key."\n",$userinput);
                   3124: 	    return 1;
                   3125: 	}
                   3126:     }
                   3127: 
                   3128:     foreach my $pair (@pairs) {
                   3129: 	my ($key,$value)=split(/=/,$pair);
                   3130: 	$hashref->{$key}=$value;
                   3131:     }
                   3132: 
1.311     albertel 3133:     if (&untie_user_hash($hashref)) {
1.283     albertel 3134: 	&Reply( $client, "ok\n", $userinput);
                   3135:     } else {
                   3136: 	&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
                   3137: 		 "while attempting put\n", 
                   3138: 		 $userinput);
                   3139:     }
                   3140:     return 1;
                   3141: }
                   3142: &register_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
                   3143: 
1.230     foxr     3144: # 
                   3145: #   Increment a profile entry in the user history file.
                   3146: #   The history contains keyword value pairs.  In this case,
                   3147: #   The value itself is a pair of numbers.  The first, the current value
                   3148: #   the second an increment that this function applies to the current
                   3149: #   value.
                   3150: #
                   3151: # Parameters:
                   3152: #    $cmd      - The command that got us here.
                   3153: #    $tail     - Tail of the command (remaining parameters).
                   3154: #    $client   - File descriptor connected to client.
                   3155: # Returns
                   3156: #     0        - Requested to exit, caller should shut down.
                   3157: #     1        - Continue processing.
                   3158: #
                   3159: sub increment_user_value_handler {
                   3160:     my ($cmd, $tail, $client) = @_;
                   3161:     
                   3162:     my $userinput   = "$cmd:$tail";
                   3163:     
                   3164:     my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
                   3165:     if ($namespace ne 'roles') {
                   3166:         chomp($what);
                   3167: 	my $hashref = &tie_user_hash($udom, $uname,
                   3168: 				     $namespace, &GDBM_WRCREAT(),
                   3169: 				     "P",$what);
                   3170: 	if ($hashref) {
                   3171: 	    my @pairs=split(/\&/,$what);
                   3172: 	    foreach my $pair (@pairs) {
                   3173: 		my ($key,$value)=split(/=/,$pair);
1.284     raeburn  3174:                 $value = &unescape($value);
1.230     foxr     3175: 		# We could check that we have a number...
                   3176: 		if (! defined($value) || $value eq '') {
                   3177: 		    $value = 1;
                   3178: 		}
                   3179: 		$hashref->{$key}+=$value;
1.284     raeburn  3180:                 if ($namespace eq 'nohist_resourcetracker') {
                   3181:                     if ($hashref->{$key} < 0) {
                   3182:                         $hashref->{$key} = 0;
                   3183:                     }
                   3184:                 }
1.230     foxr     3185: 	    }
1.311     albertel 3186: 	    if (&untie_user_hash($hashref)) {
1.230     foxr     3187: 		&Reply( $client, "ok\n", $userinput);
                   3188: 	    } else {
                   3189: 		&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
                   3190: 			 "while attempting inc\n", $userinput);
                   3191: 	    }
                   3192: 	} else {
                   3193: 	    &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3194: 		     "while attempting inc\n", $userinput);
                   3195: 	}
                   3196:     } else {
                   3197: 	&Failure($client, "refused\n", $userinput);
                   3198:     }
                   3199:     
                   3200:     return 1;
                   3201: }
                   3202: &register_handler("inc", \&increment_user_value_handler, 0, 1, 0);
                   3203: 
                   3204: #
                   3205: #   Put a new role for a user.  Roles are LonCAPA's packaging of permissions.
                   3206: #   Each 'role' a user has implies a set of permissions.  Adding a new role
                   3207: #   for a person grants the permissions packaged with that role
                   3208: #   to that user when the role is selected.
                   3209: #
                   3210: # Parameters:
                   3211: #    $cmd       - The command string (rolesput).
                   3212: #    $tail      - The remainder of the request line.  For rolesput this
                   3213: #                 consists of a colon separated list that contains:
                   3214: #                 The domain and user that is granting the role (logged).
                   3215: #                 The domain and user that is getting the role.
                   3216: #                 The roles being granted as a set of & separated pairs.
                   3217: #                 each pair a key value pair.
                   3218: #    $client    - File descriptor connected to the client.
                   3219: # Returns:
                   3220: #     0         - If the daemon should exit
                   3221: #     1         - To continue processing.
                   3222: #
                   3223: #
                   3224: sub roles_put_handler {
                   3225:     my ($cmd, $tail, $client) = @_;
                   3226: 
                   3227:     my $userinput  = "$cmd:$tail";
                   3228: 
                   3229:     my ( $exedom, $exeuser, $udom, $uname,  $what) = split(/:/,$tail);
                   3230:     
                   3231: 
                   3232:     my $namespace='roles';
                   3233:     chomp($what);
                   3234:     my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   3235: 				 &GDBM_WRCREAT(), "P",
                   3236: 				 "$exedom:$exeuser:$what");
                   3237:     #
                   3238:     #  Log the attempt to set a role.  The {}'s here ensure that the file 
                   3239:     #  handle is open for the minimal amount of time.  Since the flush
                   3240:     #  is done on close this improves the chances the log will be an un-
                   3241:     #  corrupted ordered thing.
                   3242:     if ($hashref) {
1.261     foxr     3243: 	my $pass_entry = &get_auth_type($udom, $uname);
                   3244: 	my ($auth_type,$pwd)  = split(/:/, $pass_entry);
                   3245: 	$auth_type = $auth_type.":";
1.230     foxr     3246: 	my @pairs=split(/\&/,$what);
                   3247: 	foreach my $pair (@pairs) {
                   3248: 	    my ($key,$value)=split(/=/,$pair);
                   3249: 	    &manage_permissions($key, $udom, $uname,
1.260     foxr     3250: 			       $auth_type);
1.230     foxr     3251: 	    $hashref->{$key}=$value;
                   3252: 	}
1.311     albertel 3253: 	if (&untie_user_hash($hashref)) {
1.230     foxr     3254: 	    &Reply($client, "ok\n", $userinput);
                   3255: 	} else {
                   3256: 	    &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3257: 		     "while attempting rolesput\n", $userinput);
                   3258: 	}
                   3259:     } else {
                   3260: 	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3261: 		 "while attempting rolesput\n", $userinput);
                   3262:     }
                   3263:     return 1;
                   3264: }
                   3265: &register_handler("rolesput", \&roles_put_handler, 1,1,0);  # Encoded client only.
                   3266: 
                   3267: #
1.231     foxr     3268: #   Deletes (removes) a role for a user.   This is equivalent to removing
                   3269: #  a permissions package associated with the role from the user's profile.
                   3270: #
                   3271: # Parameters:
                   3272: #     $cmd                 - The command (rolesdel)
                   3273: #     $tail                - The remainder of the request line. This consists
                   3274: #                             of:
                   3275: #                             The domain and user requesting the change (logged)
                   3276: #                             The domain and user being changed.
                   3277: #                             The roles being revoked.  These are shipped to us
                   3278: #                             as a bunch of & separated role name keywords.
                   3279: #     $client              - The file handle open on the client.
                   3280: # Returns:
                   3281: #     1                    - Continue processing
                   3282: #     0                    - Exit.
                   3283: #
                   3284: sub roles_delete_handler {
                   3285:     my ($cmd, $tail, $client)  = @_;
                   3286: 
                   3287:     my $userinput    = "$cmd:$tail";
                   3288:    
                   3289:     my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
                   3290:     &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
                   3291: 	   "what = ".$what);
                   3292:     my $namespace='roles';
                   3293:     chomp($what);
                   3294:     my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   3295: 				 &GDBM_WRCREAT(), "D",
                   3296: 				 "$exedom:$exeuser:$what");
                   3297:     
                   3298:     if ($hashref) {
                   3299: 	my @rolekeys=split(/\&/,$what);
                   3300: 	
                   3301: 	foreach my $key (@rolekeys) {
                   3302: 	    delete $hashref->{$key};
                   3303: 	}
1.315     albertel 3304: 	if (&untie_user_hash($hashref)) {
1.231     foxr     3305: 	    &Reply($client, "ok\n", $userinput);
                   3306: 	} else {
                   3307: 	    &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3308: 		     "while attempting rolesdel\n", $userinput);
                   3309: 	}
                   3310:     } else {
                   3311:         &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3312: 		 "while attempting rolesdel\n", $userinput);
                   3313:     }
                   3314:     
                   3315:     return 1;
                   3316: }
                   3317: &register_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
                   3318: 
                   3319: # Unencrypted get from a user's profile database.  See 
                   3320: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
                   3321: # This function retrieves a keyed item from a specific named database in the
                   3322: # user's directory.
                   3323: #
                   3324: # Parameters:
                   3325: #   $cmd             - Command request keyword (get).
                   3326: #   $tail            - Tail of the command.  This is a colon separated list
                   3327: #                      consisting of the domain and username that uniquely
                   3328: #                      identifies the profile,
                   3329: #                      The 'namespace' which selects the gdbm file to 
                   3330: #                      do the lookup in, 
                   3331: #                      & separated list of keys to lookup.  Note that
                   3332: #                      the values are returned as an & separated list too.
                   3333: #   $client          - File descriptor open on the client.
                   3334: # Returns:
                   3335: #   1       - Continue processing.
                   3336: #   0       - Exit.
                   3337: #
                   3338: sub get_profile_entry {
                   3339:     my ($cmd, $tail, $client) = @_;
                   3340: 
                   3341:     my $userinput= "$cmd:$tail";
                   3342:    
                   3343:     my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
                   3344:     chomp($what);
1.255     foxr     3345: 
1.390     raeburn  3346: 
1.255     foxr     3347:     my $replystring = read_profile($udom, $uname, $namespace, $what);
                   3348:     my ($first) = split(/:/,$replystring);
                   3349:     if($first ne "error") {
1.387     albertel 3350: 	&Reply($client, \$replystring, $userinput);
1.231     foxr     3351:     } else {
1.255     foxr     3352: 	&Failure($client, $replystring." while attempting get\n", $userinput);
1.231     foxr     3353:     }
                   3354:     return 1;
1.255     foxr     3355: 
                   3356: 
1.231     foxr     3357: }
                   3358: &register_handler("get", \&get_profile_entry, 0,1,0);
                   3359: 
                   3360: #
                   3361: #  Process the encrypted get request.  Note that the request is sent
                   3362: #  in clear, but the reply is encrypted.  This is a small covert channel:
                   3363: #  information about the sensitive keys is given to the snooper.  Just not
                   3364: #  information about the values of the sensitive key.  Hmm if I wanted to
                   3365: #  know these I'd snoop for the egets. Get the profile item names from them
                   3366: #  and then issue a get for them since there's no enforcement of the
                   3367: #  requirement of an encrypted get for particular profile items.  If I
                   3368: #  were re-doing this, I'd force the request to be encrypted as well as the
                   3369: #  reply.  I'd also just enforce encrypted transactions for all gets since
                   3370: #  that would prevent any covert channel snooping.
                   3371: #
                   3372: #  Parameters:
                   3373: #     $cmd               - Command keyword of request (eget).
1.489.2.32  raeburn  3374: #     $tail              - Tail of the command.  See GetProfileEntry
                   3375: #                          for more information about this.
1.231     foxr     3376: #     $client            - File open on the client.
                   3377: #  Returns:
                   3378: #     1      - Continue processing
                   3379: #     0      - server should exit.
                   3380: sub get_profile_entry_encrypted {
                   3381:     my ($cmd, $tail, $client) = @_;
                   3382: 
                   3383:     my $userinput = "$cmd:$tail";
                   3384:    
1.339     albertel 3385:     my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1.231     foxr     3386:     chomp($what);
1.255     foxr     3387:     my $qresult = read_profile($udom, $uname, $namespace, $what);
                   3388:     my ($first) = split(/:/, $qresult);
                   3389:     if($first ne "error") {
                   3390: 	
                   3391: 	if ($cipher) {
                   3392: 	    my $cmdlength=length($qresult);
                   3393: 	    $qresult.="         ";
                   3394: 	    my $encqresult='';
                   3395: 	    for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   3396: 		$encqresult.= unpack("H16", 
                   3397: 				     $cipher->encrypt(substr($qresult,
                   3398: 							     $encidx,
                   3399: 							     8)));
                   3400: 	    }
                   3401: 	    &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
                   3402: 	} else {
1.231     foxr     3403: 		&Failure( $client, "error:no_key\n", $userinput);
                   3404: 	    }
                   3405:     } else {
1.255     foxr     3406: 	&Failure($client, "$qresult while attempting eget\n", $userinput);
                   3407: 
1.231     foxr     3408:     }
                   3409:     
                   3410:     return 1;
                   3411: }
1.255     foxr     3412: &register_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263     albertel 3413: 
1.231     foxr     3414: #
                   3415: #   Deletes a key in a user profile database.
                   3416: #   
                   3417: #   Parameters:
                   3418: #       $cmd                  - Command keyword (del).
                   3419: #       $tail                 - Command tail.  IN this case a colon
                   3420: #                               separated list containing:
                   3421: #                               The domain and user that identifies uniquely
                   3422: #                               the identity of the user.
                   3423: #                               The profile namespace (name of the profile
                   3424: #                               database file).
                   3425: #                               & separated list of keywords to delete.
                   3426: #       $client              - File open on client socket.
                   3427: # Returns:
                   3428: #     1   - Continue processing
                   3429: #     0   - Exit server.
                   3430: #
                   3431: #
                   3432: sub delete_profile_entry {
                   3433:     my ($cmd, $tail, $client) = @_;
                   3434: 
                   3435:     my $userinput = "cmd:$tail";
                   3436: 
                   3437:     my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
                   3438:     chomp($what);
                   3439:     my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   3440: 				 &GDBM_WRCREAT(),
                   3441: 				 "D",$what);
                   3442:     if ($hashref) {
                   3443:         my @keys=split(/\&/,$what);
                   3444: 	foreach my $key (@keys) {
                   3445: 	    delete($hashref->{$key});
                   3446: 	}
1.315     albertel 3447: 	if (&untie_user_hash($hashref)) {
1.231     foxr     3448: 	    &Reply($client, "ok\n", $userinput);
                   3449: 	} else {
                   3450: 	    &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3451: 		    "while attempting del\n", $userinput);
                   3452: 	}
                   3453:     } else {
                   3454: 	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3455: 		 "while attempting del\n", $userinput);
                   3456:     }
                   3457:     return 1;
                   3458: }
                   3459: &register_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263     albertel 3460: 
1.231     foxr     3461: #
                   3462: #  List the set of keys that are defined in a profile database file.
                   3463: #  A successful reply from this will contain an & separated list of
                   3464: #  the keys. 
                   3465: # Parameters:
                   3466: #     $cmd              - Command request (keys).
                   3467: #     $tail             - Remainder of the request, a colon separated
                   3468: #                         list containing domain/user that identifies the
                   3469: #                         user being queried, and the database namespace
                   3470: #                         (database filename essentially).
                   3471: #     $client           - File open on the client.
                   3472: #  Returns:
                   3473: #    1    - Continue processing.
                   3474: #    0    - Exit the server.
                   3475: #
                   3476: sub get_profile_keys {
                   3477:     my ($cmd, $tail, $client) = @_;
                   3478: 
                   3479:     my $userinput = "$cmd:$tail";
                   3480: 
                   3481:     my ($udom,$uname,$namespace)=split(/:/,$tail);
                   3482:     my $qresult='';
                   3483:     my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   3484: 				  &GDBM_READER());
                   3485:     if ($hashref) {
                   3486: 	foreach my $key (keys %$hashref) {
                   3487: 	    $qresult.="$key&";
                   3488: 	}
1.315     albertel 3489: 	if (&untie_user_hash($hashref)) {
1.231     foxr     3490: 	    $qresult=~s/\&$//;
1.387     albertel 3491: 	    &Reply($client, \$qresult, $userinput);
1.231     foxr     3492: 	} else {
                   3493: 	    &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3494: 		    "while attempting keys\n", $userinput);
                   3495: 	}
                   3496:     } else {
                   3497: 	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3498: 		 "while attempting keys\n", $userinput);
                   3499:     }
                   3500:    
                   3501:     return 1;
                   3502: }
                   3503: &register_handler("keys", \&get_profile_keys, 0, 1, 0);
                   3504: 
                   3505: #
                   3506: #   Dump the contents of a user profile database.
                   3507: #   Note that this constitutes a very large covert channel too since
                   3508: #   the dump will return sensitive information that is not encrypted.
                   3509: #   The naive security assumption is that the session negotiation ensures
                   3510: #   our client is trusted and I don't believe that's assured at present.
                   3511: #   Sure want badly to go to ssl or tls.  Of course if my peer isn't really
                   3512: #   a LonCAPA node they could have negotiated an encryption key too so >sigh<.
                   3513: # 
                   3514: #  Parameters:
                   3515: #     $cmd           - The command request keyword (currentdump).
                   3516: #     $tail          - Remainder of the request, consisting of a colon
                   3517: #                      separated list that has the domain/username and
                   3518: #                      the namespace to dump (database file).
                   3519: #     $client        - file open on the remote client.
                   3520: # Returns:
                   3521: #     1    - Continue processing.
                   3522: #     0    - Exit the server.
                   3523: #
                   3524: sub dump_profile_database {
                   3525:     my ($cmd, $tail, $client) = @_;
                   3526: 
                   3527:     my $userinput = "$cmd:$tail";
                   3528:    
                   3529:     my ($udom,$uname,$namespace) = split(/:/,$tail);
                   3530:     my $hashref = &tie_user_hash($udom, $uname, $namespace,
                   3531: 				 &GDBM_READER());
                   3532:     if ($hashref) {
                   3533: 	# Structure of %data:
                   3534: 	# $data{$symb}->{$parameter}=$value;
                   3535: 	# $data{$symb}->{'v.'.$parameter}=$version;
                   3536: 	# since $parameter will be unescaped, we do not
                   3537:  	# have to worry about silly parameter names...
                   3538: 	
                   3539:         my $qresult='';
                   3540: 	my %data = ();                     # A hash of anonymous hashes..
                   3541: 	while (my ($key,$value) = each(%$hashref)) {
                   3542: 	    my ($v,$symb,$param) = split(/:/,$key);
                   3543: 	    next if ($v eq 'version' || $symb eq 'keys');
                   3544: 	    next if (exists($data{$symb}) && 
                   3545: 		     exists($data{$symb}->{$param}) &&
                   3546: 		     $data{$symb}->{'v.'.$param} > $v);
                   3547: 	    $data{$symb}->{$param}=$value;
                   3548: 	    $data{$symb}->{'v.'.$param}=$v;
                   3549: 	}
1.311     albertel 3550: 	if (&untie_user_hash($hashref)) {
1.231     foxr     3551: 	    while (my ($symb,$param_hash) = each(%data)) {
                   3552: 		while(my ($param,$value) = each (%$param_hash)){
                   3553: 		    next if ($param =~ /^v\./);       # Ignore versions...
                   3554: 		    #
                   3555: 		    #   Just dump the symb=value pairs separated by &
                   3556: 		    #
                   3557: 		    $qresult.=$symb.':'.$param.'='.$value.'&';
                   3558: 		}
                   3559: 	    }
                   3560: 	    chop($qresult);
1.387     albertel 3561: 	    &Reply($client , \$qresult, $userinput);
1.231     foxr     3562: 	} else {
                   3563: 	    &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3564: 		     "while attempting currentdump\n", $userinput);
                   3565: 	}
                   3566:     } else {
                   3567: 	&Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3568: 		"while attempting currentdump\n", $userinput);
                   3569:     }
                   3570: 
                   3571:     return 1;
                   3572: }
                   3573: &register_handler("currentdump", \&dump_profile_database, 0, 1, 0);
                   3574: 
                   3575: #
                   3576: #   Dump a profile database with an optional regular expression
                   3577: #   to match against the keys.  In this dump, no effort is made
                   3578: #   to separate symb from version information. Presumably the
                   3579: #   databases that are dumped by this command are of a different
                   3580: #   structure.  Need to look at this and improve the documentation of
                   3581: #   both this and the currentdump handler.
                   3582: # Parameters:
                   3583: #    $cmd                     - The command keyword.
                   3584: #    $tail                    - All of the characters after the $cmd:
                   3585: #                               These are expected to be a colon
                   3586: #                               separated list containing:
                   3587: #                               domain/user - identifying the user.
                   3588: #                               namespace   - identifying the database.
                   3589: #                               regexp      - optional regular expression
                   3590: #                                             that is matched against
                   3591: #                                             database keywords to do
                   3592: #                                             selective dumps.
1.488     raeburn  3593: #                               range       - optional range of entries
                   3594: #                                             e.g., 10-20 would return the
                   3595: #                                             10th to 19th items, etc.  
1.231     foxr     3596: #   $client                   - Channel open on the client.
                   3597: # Returns:
                   3598: #    1    - Continue processing.
                   3599: # Side effects:
                   3600: #    response is written to $client.
                   3601: #
                   3602: sub dump_with_regexp {
                   3603:     my ($cmd, $tail, $client) = @_;
                   3604: 
1.489.2.4  raeburn  3605:     my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
1.231     foxr     3606: 
1.489.2.4  raeburn  3607:     if ($res =~ /^error:/) {
                   3608:         &Failure($client, \$res, "$cmd:$tail");
1.231     foxr     3609:     } else {
1.489.2.4  raeburn  3610:         &Reply($client, \$res, "$cmd:$tail");
1.231     foxr     3611:     }
                   3612: 
                   3613:     return 1;
                   3614: }
                   3615: &register_handler("dump", \&dump_with_regexp, 0, 1, 0);
                   3616: 
1.489.2.43.2.  (raeburn 3617:): #
                   3618:): #  Process the encrypted dump request. Original call should
                   3619:): #  be from lonnet::dump() with seventh arg ($encrypt) set to
                   3620:): #  1, to ensure that both request and response are encrypted.
                   3621:): #
                   3622:): #  Parameters:
                   3623:): #     $cmd               - Command keyword of request (edump).
                   3624:): #     $tail              - Tail of the command.
                   3625:): #                          See &dump_with_regexp for more
                   3626:): #                          information about this.
                   3627:): #     $client            - File open on the client.
                   3628:): #  Returns:
                   3629:): #     1      - Continue processing
                   3630:): #     0      - server should exit.
                   3631:): #
                   3632:): 
                   3633:): sub encrypted_dump_with_regexp {
                   3634:):     my ($cmd, $tail, $client) = @_;
                   3635:):     my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
                   3636:): 
                   3637:):     if ($res =~ /^error:/) {
                   3638:):         Failure($client, \$res, "$cmd:$tail");
                   3639:):     } else {
                   3640:):         if ($cipher) {
                   3641:):             my $cmdlength=length($res);
                   3642:):             $res.="         ";
                   3643:):             my $encres='';
                   3644:):             for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   3645:):                 $encres.= unpack("H16",
                   3646:):                                  $cipher->encrypt(substr($res,
                   3647:):                                                          $encidx,
                   3648:):                                                          8)));
                   3649:):             }
                   3650:):             &Reply( $client,"enc:$cmdlength:$encres\n","$cmd:$tail");
                   3651:):         } else {
                   3652:):             &Failure( $client, "error:no_key\n","$cmd:$tail");
                   3653:):         }
                   3654:):     }
                   3655:): }
                   3656:): &register_handler("edump", \&encrypted_dump_with_regexp, 0, 1, 0);
                   3657:): 
1.231     foxr     3658: #  Store a set of key=value pairs associated with a versioned name.
                   3659: #
                   3660: #  Parameters:
                   3661: #    $cmd                - Request command keyword.
                   3662: #    $tail               - Tail of the request.  This is a colon
                   3663: #                          separated list containing:
                   3664: #                          domain/user - User and authentication domain.
                   3665: #                          namespace   - Name of the database being modified
                   3666: #                          rid         - Resource keyword to modify.
                   3667: #                          what        - new value associated with rid.
1.489.2.17  raeburn  3668: #                          laststore   - (optional) version=timestamp
                   3669: #                                        for most recent transaction for rid
                   3670: #                                        in namespace, when cstore was called
1.231     foxr     3671: #
                   3672: #    $client             - Socket open on the client.
                   3673: #
                   3674: #
                   3675: #  Returns:
                   3676: #      1 (keep on processing).
                   3677: #  Side-Effects:
                   3678: #    Writes to the client
1.489.2.17  raeburn  3679: #    Successful storage will cause either 'ok', or, if $laststore was included
                   3680: #    in the tail of the request, and the version number for the last transaction
                   3681: #    is larger than the version in $laststore, delay:$numtrans , where $numtrans
                   3682: #    is the number of store evevnts recorded for rid in namespace since
                   3683: #    lonnet::store() was called by the client.
                   3684: #
1.231     foxr     3685: sub store_handler {
                   3686:     my ($cmd, $tail, $client) = @_;
                   3687:  
                   3688:     my $userinput = "$cmd:$tail";
                   3689: 
1.489.2.17  raeburn  3690:     chomp($tail);
                   3691:     my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
1.231     foxr     3692:     if ($namespace ne 'roles') {
                   3693: 
                   3694: 	my @pairs=split(/\&/,$what);
                   3695: 	my $hashref  = &tie_user_hash($udom, $uname, $namespace,
1.268     albertel 3696: 				       &GDBM_WRCREAT(), "S",
1.231     foxr     3697: 				       "$rid:$what");
                   3698: 	if ($hashref) {
                   3699: 	    my $now = time;
1.489.2.17  raeburn  3700:             my $numtrans;
                   3701:             if ($laststore) {
                   3702:                 my ($previousversion,$previoustime) = split(/\=/,$laststore);
                   3703:                 my ($lastversion,$lasttime) = (0,0);
                   3704:                 $lastversion = $hashref->{"version:$rid"};
                   3705:                 if ($lastversion) {
                   3706:                     $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
                   3707:                 }
                   3708:                 if (($previousversion) && ($previousversion !~ /\D/)) {
                   3709:                     if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
                   3710:                         $numtrans = $lastversion - $previousversion;
                   3711:                     }
                   3712:                 } elsif ($lastversion) {
                   3713:                     $numtrans = $lastversion;
                   3714:                 }
                   3715:                 if ($numtrans) {
                   3716:                     $numtrans =~ s/D//g;
                   3717:                 }
                   3718:             }
                   3719: 
1.231     foxr     3720: 	    $hashref->{"version:$rid"}++;
                   3721: 	    my $version=$hashref->{"version:$rid"};
                   3722: 	    my $allkeys=''; 
                   3723: 	    foreach my $pair (@pairs) {
                   3724: 		my ($key,$value)=split(/=/,$pair);
                   3725: 		$allkeys.=$key.':';
                   3726: 		$hashref->{"$version:$rid:$key"}=$value;
                   3727: 	    }
                   3728: 	    $hashref->{"$version:$rid:timestamp"}=$now;
                   3729: 	    $allkeys.='timestamp';
                   3730: 	    $hashref->{"$version:keys:$rid"}=$allkeys;
1.311     albertel 3731: 	    if (&untie_user_hash($hashref)) {
1.489.2.17  raeburn  3732:                 my $msg = 'ok';
                   3733:                 if ($numtrans) {
                   3734:                     $msg = 'delay:'.$numtrans;
                   3735:                 }
                   3736:                 &Reply($client, "$msg\n", $userinput);
1.231     foxr     3737: 	    } else {
                   3738: 		&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3739: 			"while attempting store\n", $userinput);
                   3740: 	    }
                   3741: 	} else {
                   3742: 	    &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3743: 		     "while attempting store\n", $userinput);
                   3744: 	}
                   3745:     } else {
                   3746: 	&Failure($client, "refused\n", $userinput);
                   3747:     }
                   3748: 
                   3749:     return 1;
                   3750: }
                   3751: &register_handler("store", \&store_handler, 0, 1, 0);
1.263     albertel 3752: 
1.323     albertel 3753: #  Modify a set of key=value pairs associated with a versioned name.
                   3754: #
                   3755: #  Parameters:
                   3756: #    $cmd                - Request command keyword.
                   3757: #    $tail               - Tail of the request.  This is a colon
                   3758: #                          separated list containing:
                   3759: #                          domain/user - User and authentication domain.
                   3760: #                          namespace   - Name of the database being modified
                   3761: #                          rid         - Resource keyword to modify.
                   3762: #                          v           - Version item to modify
                   3763: #                          what        - new value associated with rid.
                   3764: #
                   3765: #    $client             - Socket open on the client.
                   3766: #
                   3767: #
                   3768: #  Returns:
                   3769: #      1 (keep on processing).
                   3770: #  Side-Effects:
                   3771: #    Writes to the client
                   3772: sub putstore_handler {
                   3773:     my ($cmd, $tail, $client) = @_;
                   3774:  
                   3775:     my $userinput = "$cmd:$tail";
                   3776: 
                   3777:     my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
                   3778:     if ($namespace ne 'roles') {
                   3779: 
                   3780: 	chomp($what);
                   3781: 	my $hashref  = &tie_user_hash($udom, $uname, $namespace,
                   3782: 				       &GDBM_WRCREAT(), "M",
                   3783: 				       "$rid:$v:$what");
                   3784: 	if ($hashref) {
                   3785: 	    my $now = time;
                   3786: 	    my %data = &hash_extract($what);
                   3787: 	    my @allkeys;
                   3788: 	    while (my($key,$value) = each(%data)) {
                   3789: 		push(@allkeys,$key);
                   3790: 		$hashref->{"$v:$rid:$key"} = $value;
                   3791: 	    }
                   3792: 	    my $allkeys = join(':',@allkeys);
                   3793: 	    $hashref->{"$v:keys:$rid"}=$allkeys;
                   3794: 
                   3795: 	    if (&untie_user_hash($hashref)) {
                   3796: 		&Reply($client, "ok\n", $userinput);
                   3797: 	    } else {
                   3798: 		&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3799: 			"while attempting store\n", $userinput);
                   3800: 	    }
                   3801: 	} else {
                   3802: 	    &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3803: 		     "while attempting store\n", $userinput);
                   3804: 	}
                   3805:     } else {
                   3806: 	&Failure($client, "refused\n", $userinput);
                   3807:     }
                   3808: 
                   3809:     return 1;
                   3810: }
                   3811: &register_handler("putstore", \&putstore_handler, 0, 1, 0);
                   3812: 
                   3813: sub hash_extract {
                   3814:     my ($str)=@_;
                   3815:     my %hash;
                   3816:     foreach my $pair (split(/\&/,$str)) {
                   3817: 	my ($key,$value)=split(/=/,$pair);
                   3818: 	$hash{$key}=$value;
                   3819:     }
                   3820:     return (%hash);
                   3821: }
                   3822: sub hash_to_str {
                   3823:     my ($hash_ref)=@_;
                   3824:     my $str;
                   3825:     foreach my $key (keys(%$hash_ref)) {
                   3826: 	$str.=$key.'='.$hash_ref->{$key}.'&';
                   3827:     }
                   3828:     $str=~s/\&$//;
                   3829:     return $str;
                   3830: }
                   3831: 
1.231     foxr     3832: #
                   3833: #  Dump out all versions of a resource that has key=value pairs associated
                   3834: # with it for each version.  These resources are built up via the store
                   3835: # command.
                   3836: #
                   3837: #  Parameters:
                   3838: #     $cmd               - Command keyword.
                   3839: #     $tail              - Remainder of the request which consists of:
                   3840: #                          domain/user   - User and auth. domain.
                   3841: #                          namespace     - name of resource database.
                   3842: #                          rid           - Resource id.
                   3843: #    $client             - socket open on the client.
                   3844: #
                   3845: # Returns:
                   3846: #      1  indicating the caller should not yet exit.
                   3847: # Side-effects:
                   3848: #   Writes a reply to the client.
                   3849: #   The reply is a string of the following shape:
                   3850: #   version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
                   3851: #    Where the 1 above represents version 1.
                   3852: #    this continues for all pairs of keys in all versions.
                   3853: #
                   3854: #
                   3855: #    
                   3856: #
                   3857: sub restore_handler {
                   3858:     my ($cmd, $tail, $client) = @_;
                   3859: 
                   3860:     my $userinput = "$cmd:$tail";	# Only used for logging purposes.
1.351     banghart 3861:     my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
1.352     albertel 3862:     $namespace=~s/\//\_/g;
1.350     albertel 3863:     $namespace = &LONCAPA::clean_username($namespace);
1.349     albertel 3864: 
1.231     foxr     3865:     chomp($rid);
                   3866:     my $qresult='';
1.309     albertel 3867:     my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
                   3868:     if ($hashref) {
                   3869: 	my $version=$hashref->{"version:$rid"};
1.231     foxr     3870: 	$qresult.="version=$version&";
                   3871: 	my $scope;
                   3872: 	for ($scope=1;$scope<=$version;$scope++) {
1.309     albertel 3873: 	    my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231     foxr     3874: 	    my @keys=split(/:/,$vkeys);
                   3875: 	    my $key;
                   3876: 	    $qresult.="$scope:keys=$vkeys&";
                   3877: 	    foreach $key (@keys) {
1.309     albertel 3878: 		$qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
1.231     foxr     3879: 	    }                                  
                   3880: 	}
1.311     albertel 3881: 	if (&untie_user_hash($hashref)) {
1.231     foxr     3882: 	    $qresult=~s/\&$//;
1.387     albertel 3883: 	    &Reply( $client, \$qresult, $userinput);
1.231     foxr     3884: 	} else {
                   3885: 	    &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   3886: 		    "while attempting restore\n", $userinput);
                   3887: 	}
                   3888:     } else {
                   3889: 	&Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   3890: 		"while attempting restore\n", $userinput);
                   3891:     }
                   3892:   
                   3893:     return 1;
                   3894: 
                   3895: 
                   3896: }
                   3897: &register_handler("restore", \&restore_handler, 0,1,0);
1.234     foxr     3898: 
                   3899: #
1.324     raeburn  3900: #   Add a chat message to a synchronous discussion board.
1.234     foxr     3901: #
                   3902: # Parameters:
                   3903: #    $cmd                - Request keyword.
                   3904: #    $tail               - Tail of the command. A colon separated list
                   3905: #                          containing:
                   3906: #                          cdom    - Domain on which the chat board lives
1.324     raeburn  3907: #                          cnum    - Course containing the chat board.
                   3908: #                          newpost - Body of the posting.
                   3909: #                          group   - Optional group, if chat board is only 
                   3910: #                                    accessible in a group within the course 
1.234     foxr     3911: #   $client              - Socket open on the client.
                   3912: # Returns:
                   3913: #   1    - Indicating caller should keep on processing.
                   3914: #
                   3915: # Side-effects:
                   3916: #   writes a reply to the client.
                   3917: #
                   3918: #
                   3919: sub send_chat_handler {
                   3920:     my ($cmd, $tail, $client) = @_;
                   3921: 
                   3922:     
                   3923:     my $userinput = "$cmd:$tail";
                   3924: 
1.324     raeburn  3925:     my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
                   3926:     &chat_add($cdom,$cnum,$newpost,$group);
1.234     foxr     3927:     &Reply($client, "ok\n", $userinput);
                   3928: 
                   3929:     return 1;
                   3930: }
                   3931: &register_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263     albertel 3932: 
1.234     foxr     3933: #
1.324     raeburn  3934: #   Retrieve the set of chat messages from a discussion board.
1.234     foxr     3935: #
                   3936: #  Parameters:
                   3937: #    $cmd             - Command keyword that initiated the request.
                   3938: #    $tail            - Remainder of the request after the command
                   3939: #                       keyword.  In this case a colon separated list of
                   3940: #                       chat domain    - Which discussion board.
                   3941: #                       chat id        - Discussion thread(?)
                   3942: #                       domain/user    - Authentication domain and username
                   3943: #                                        of the requesting person.
1.324     raeburn  3944: #                       group          - Optional course group containing
                   3945: #                                        the board.      
1.234     foxr     3946: #   $client           - Socket open on the client program.
                   3947: # Returns:
                   3948: #    1     - continue processing
                   3949: # Side effects:
                   3950: #    Response is written to the client.
                   3951: #
                   3952: sub retrieve_chat_handler {
                   3953:     my ($cmd, $tail, $client) = @_;
                   3954: 
                   3955: 
                   3956:     my $userinput = "$cmd:$tail";
                   3957: 
1.324     raeburn  3958:     my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
1.234     foxr     3959:     my $reply='';
1.324     raeburn  3960:     foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
1.234     foxr     3961: 	$reply.=&escape($_).':';
                   3962:     }
                   3963:     $reply=~s/\:$//;
1.387     albertel 3964:     &Reply($client, \$reply, $userinput);
1.234     foxr     3965: 
                   3966: 
                   3967:     return 1;
                   3968: }
                   3969: &register_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
                   3970: 
                   3971: #
                   3972: #  Initiate a query of an sql database.  SQL query repsonses get put in
                   3973: #  a file for later retrieval.  This prevents sql query results from
                   3974: #  bottlenecking the system.  Note that with loncnew, perhaps this is
                   3975: #  less of an issue since multiple outstanding requests can be concurrently
                   3976: #  serviced.
                   3977: #
                   3978: #  Parameters:
                   3979: #     $cmd       - COmmand keyword that initiated the request.
                   3980: #     $tail      - Remainder of the command after the keyword.
                   3981: #                  For this function, this consists of a query and
                   3982: #                  3 arguments that are self-documentingly labelled
                   3983: #                  in the original arg1, arg2, arg3.
                   3984: #     $client    - Socket open on the client.
                   3985: # Return:
                   3986: #    1   - Indicating processing should continue.
                   3987: # Side-effects:
                   3988: #    a reply is written to $client.
                   3989: #
                   3990: sub send_query_handler {
                   3991:     my ($cmd, $tail, $client) = @_;
                   3992: 
                   3993: 
                   3994:     my $userinput = "$cmd:$tail";
                   3995: 
                   3996:     my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
                   3997:     $query=~s/\n*$//g;
1.489.2.27  raeburn  3998:     if (($query eq 'usersearch') || ($query eq 'instdirsearch')) {
                   3999:         my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch');
                   4000:         my $earlyout;
                   4001:         if (ref($usersearchconf) eq 'HASH') {
                   4002:             if ($currentdomainid eq $clienthomedom) {
                   4003:                 if ($query eq 'usersearch') {
                   4004:                     if ($usersearchconf->{'lcavailable'} eq '0') {
                   4005:                         $earlyout = 1;
                   4006:                     }
                   4007:                 } else {
                   4008:                     if ($usersearchconf->{'available'} eq '0') {
                   4009:                         $earlyout = 1;
                   4010:                     }
                   4011:                 }
                   4012:             } else {
                   4013:                 if ($query eq 'usersearch') {
                   4014:                     if ($usersearchconf->{'lclocalonly'}) {
                   4015:                         $earlyout = 1;
                   4016:                     }
                   4017:                 } else {
                   4018:                     if ($usersearchconf->{'localonly'}) {
                   4019:                         $earlyout = 1;
                   4020:                     }
                   4021:                 }
                   4022:             }
                   4023:         }
                   4024:         if ($earlyout) {
                   4025:             &Reply($client, "query_not_authorized\n");
                   4026:             return 1;
                   4027:         }
                   4028:     }
1.234     foxr     4029:     &Reply($client, "". &sql_reply("$clientname\&$query".
                   4030: 				"\&$arg1"."\&$arg2"."\&$arg3")."\n",
                   4031: 	  $userinput);
                   4032:     
                   4033:     return 1;
                   4034: }
                   4035: &register_handler("querysend", \&send_query_handler, 0, 1, 0);
                   4036: 
                   4037: #
                   4038: #   Add a reply to an sql query.  SQL queries are done asyncrhonously.
                   4039: #   The query is submitted via a "querysend" transaction.
                   4040: #   There it is passed on to the lonsql daemon, queued and issued to
                   4041: #   mysql.
                   4042: #     This transaction is invoked when the sql transaction is complete
                   4043: #   it stores the query results in flie and indicates query completion.
                   4044: #   presumably local software then fetches this response... I'm guessing
                   4045: #   the sequence is: lonc does a querysend, we ask lonsql to do it.
                   4046: #   lonsql on completion of the query interacts with the lond of our
                   4047: #   client to do a query reply storing two files:
                   4048: #    - id     - The results of the query.
                   4049: #    - id.end - Indicating the transaction completed. 
                   4050: #    NOTE: id is a unique id assigned to the query and querysend time.
                   4051: # Parameters:
                   4052: #    $cmd        - Command keyword that initiated this request.
                   4053: #    $tail       - Remainder of the tail.  In this case that's a colon
                   4054: #                  separated list containing the query Id and the 
                   4055: #                  results of the query.
                   4056: #    $client     - Socket open on the client.
                   4057: # Return:
                   4058: #    1           - Indicating that we should continue processing.
                   4059: # Side effects:
                   4060: #    ok written to the client.
                   4061: #
                   4062: sub reply_query_handler {
                   4063:     my ($cmd, $tail, $client) = @_;
                   4064: 
                   4065: 
                   4066:     my $userinput = "$cmd:$tail";
                   4067: 
1.339     albertel 4068:     my ($id,$reply)=split(/:/,$tail); 
1.234     foxr     4069:     my $store;
                   4070:     my $execdir=$perlvar{'lonDaemons'};
                   4071:     if ($store=IO::File->new(">$execdir/tmp/$id")) {
                   4072: 	$reply=~s/\&/\n/g;
                   4073: 	print $store $reply;
                   4074: 	close $store;
                   4075: 	my $store2=IO::File->new(">$execdir/tmp/$id.end");
                   4076: 	print $store2 "done\n";
                   4077: 	close $store2;
                   4078: 	&Reply($client, "ok\n", $userinput);
                   4079:     } else {
                   4080: 	&Failure($client, "error: ".($!+0)
                   4081: 		." IO::File->new Failed ".
                   4082: 		"while attempting queryreply\n", $userinput);
                   4083:     }
                   4084:  
                   4085: 
                   4086:     return 1;
                   4087: }
                   4088: &register_handler("queryreply", \&reply_query_handler, 0, 1, 0);
                   4089: 
                   4090: #
                   4091: #  Process the courseidput request.  Not quite sure what this means
                   4092: #  at the system level sense.  It appears a gdbm file in the 
                   4093: #  /home/httpd/lonUsers/$domain/nohist_courseids is tied and
                   4094: #  a set of entries made in that database.
                   4095: #
                   4096: # Parameters:
                   4097: #   $cmd      - The command keyword that initiated this request.
                   4098: #   $tail     - Tail of the command.  In this case consists of a colon
                   4099: #               separated list contaning the domain to apply this to and
                   4100: #               an ampersand separated list of keyword=value pairs.
1.272     raeburn  4101: #               Each value is a colon separated list that includes:  
                   4102: #               description, institutional code and course owner.
                   4103: #               For backward compatibility with versions included
                   4104: #               in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
                   4105: #               code and/or course owner are preserved from the existing 
                   4106: #               record when writing a new record in response to 1.1 or 
                   4107: #               1.2 implementations of lonnet::flushcourselogs().   
                   4108: #                      
1.234     foxr     4109: #   $client   - Socket open on the client.
                   4110: # Returns:
                   4111: #   1    - indicating that processing should continue
                   4112: #
                   4113: # Side effects:
                   4114: #   reply is written to the client.
                   4115: #
                   4116: sub put_course_id_handler {
                   4117:     my ($cmd, $tail, $client) = @_;
                   4118: 
                   4119: 
                   4120:     my $userinput = "$cmd:$tail";
                   4121: 
1.266     raeburn  4122:     my ($udom, $what) = split(/:/, $tail,2);
1.234     foxr     4123:     chomp($what);
                   4124:     my $now=time;
                   4125:     my @pairs=split(/\&/,$what);
                   4126: 
                   4127:     my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
                   4128:     if ($hashref) {
                   4129: 	foreach my $pair (@pairs) {
1.271     raeburn  4130:             my ($key,$courseinfo) = split(/=/,$pair,2);
                   4131:             $courseinfo =~ s/=/:/g;
1.384     raeburn  4132:             if (defined($hashref->{$key})) {
                   4133:                 my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
                   4134:                 if (ref($value) eq 'HASH') {
                   4135:                     my @items = ('description','inst_code','owner','type');
                   4136:                     my @new_items = split(/:/,$courseinfo,-1);
                   4137:                     my %storehash; 
                   4138:                     for (my $i=0; $i<@new_items; $i++) {
1.391     raeburn  4139:                         $storehash{$items[$i]} = &unescape($new_items[$i]);
1.384     raeburn  4140:                     }
                   4141:                     $hashref->{$key} = 
                   4142:                         &Apache::lonnet::freeze_escape(\%storehash);
                   4143:                     my $unesc_key = &unescape($key);
                   4144:                     $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
                   4145:                     next;
1.383     raeburn  4146:                 }
1.384     raeburn  4147:             }
                   4148:             my @current_items = split(/:/,$hashref->{$key},-1);
                   4149:             shift(@current_items); # remove description
                   4150:             pop(@current_items);   # remove last access
                   4151:             my $numcurrent = scalar(@current_items);
                   4152:             if ($numcurrent > 3) {
                   4153:                 $numcurrent = 3;
                   4154:             }
                   4155:             my @new_items = split(/:/,$courseinfo,-1);
                   4156:             my $numnew = scalar(@new_items);
                   4157:             if ($numcurrent > 0) {
                   4158:                 if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2 
                   4159:                     for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
                   4160:                         $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
1.333     raeburn  4161:                     }
1.272     raeburn  4162:                 }
                   4163:             }
1.384     raeburn  4164:             $hashref->{$key}=$courseinfo.':'.$now;
1.234     foxr     4165: 	}
1.311     albertel 4166: 	if (&untie_domain_hash($hashref)) {
1.253     foxr     4167: 	    &Reply( $client, "ok\n", $userinput);
1.234     foxr     4168: 	} else {
1.253     foxr     4169: 	    &Failure($client, "error: ".($!+0)
1.234     foxr     4170: 		     ." untie(GDBM) Failed ".
                   4171: 		     "while attempting courseidput\n", $userinput);
                   4172: 	}
                   4173:     } else {
1.253     foxr     4174: 	&Failure($client, "error: ".($!+0)
1.234     foxr     4175: 		 ." tie(GDBM) Failed ".
                   4176: 		 "while attempting courseidput\n", $userinput);
                   4177:     }
                   4178: 
                   4179:     return 1;
                   4180: }
                   4181: &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
                   4182: 
1.383     raeburn  4183: sub put_course_id_hash_handler {
                   4184:     my ($cmd, $tail, $client) = @_;
                   4185:     my $userinput = "$cmd:$tail";
1.384     raeburn  4186:     my ($udom,$mode,$what) = split(/:/, $tail,3);
1.383     raeburn  4187:     chomp($what);
                   4188:     my $now=time;
                   4189:     my @pairs=split(/\&/,$what);
1.384     raeburn  4190:     my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
1.383     raeburn  4191:     if ($hashref) {
                   4192:         foreach my $pair (@pairs) {
                   4193:             my ($key,$value)=split(/=/,$pair);
1.384     raeburn  4194:             my $unesc_key = &unescape($key);
                   4195:             if ($mode ne 'timeonly') {
                   4196:                 if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
                   4197:                     my $curritems = &Apache::lonnet::thaw_unescape($key); 
                   4198:                     if (ref($curritems) ne 'HASH') {
                   4199:                         my @current_items = split(/:/,$hashref->{$key},-1);
                   4200:                         my $lasttime = pop(@current_items);
                   4201:                         $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
                   4202:                     } else {
                   4203:                         $hashref->{&escape('lasttime:'.$unesc_key)} = '';
                   4204:                     }
                   4205:                 } 
                   4206:                 $hashref->{$key} = $value;
                   4207:             }
                   4208:             if ($mode ne 'notime') {
                   4209:                 $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
                   4210:             }
1.383     raeburn  4211:         }
                   4212:         if (&untie_domain_hash($hashref)) {
                   4213:             &Reply($client, "ok\n", $userinput);
                   4214:         } else {
                   4215:             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   4216:                      "while attempting courseidputhash\n", $userinput);
                   4217:         }
                   4218:     } else {
                   4219:         &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   4220:                   "while attempting courseidputhash\n", $userinput);
                   4221:     }
                   4222:     return 1;
                   4223: }
                   4224: &register_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
                   4225: 
1.234     foxr     4226: #  Retrieves the value of a course id resource keyword pattern
                   4227: #  defined since a starting date.  Both the starting date and the
                   4228: #  keyword pattern are optional.  If the starting date is not supplied it
                   4229: #  is treated as the beginning of time.  If the pattern is not found,
                   4230: #  it is treatred as "." matching everything.
                   4231: #
                   4232: #  Parameters:
                   4233: #     $cmd     - Command keyword that resulted in us being dispatched.
                   4234: #     $tail    - The remainder of the command that, in this case, consists
                   4235: #                of a colon separated list of:
                   4236: #                 domain   - The domain in which the course database is 
                   4237: #                            defined.
                   4238: #                 since    - Optional parameter describing the minimum
                   4239: #                            time of definition(?) of the resources that
                   4240: #                            will match the dump.
                   4241: #                 description - regular expression that is used to filter
                   4242: #                            the dump.  Only keywords matching this regexp
                   4243: #                            will be used.
1.272     raeburn  4244: #                 institutional code - optional supplied code to filter 
                   4245: #                            the dump. Only courses with an institutional code 
                   4246: #                            that match the supplied code will be returned.
1.336     raeburn  4247: #                 owner    - optional supplied username and domain of owner to
                   4248: #                            filter the dump.  Only courses for which the course
                   4249: #                            owner matches the supplied username and/or domain
                   4250: #                            will be returned. Pre-2.2.0 legacy entries from 
                   4251: #                            nohist_courseiddump will only contain usernames.
1.384     raeburn  4252: #                 type     - optional parameter for selection 
1.418     raeburn  4253: #                 regexp_ok - if 1 or -1 allow the supplied institutional code
                   4254: #                            filter to behave as a regular expression:
                   4255: #	                      1 will not exclude the course if the instcode matches the RE 
                   4256: #                            -1 will exclude the course if the instcode matches the RE
1.384     raeburn  4257: #                 rtn_as_hash - whether to return the information available for
                   4258: #                            each matched item as a frozen hash of all 
                   4259: #                            key, value pairs in the item's hash, or as a 
                   4260: #                            colon-separated list of (in order) description,
                   4261: #                            institutional code, and course owner.
1.404     raeburn  4262: #                 selfenrollonly - filter by courses allowing self-enrollment  
                   4263: #                                  now or in the future (selfenrollonly = 1).
                   4264: #                 catfilter - filter by course category, assigned to a course 
                   4265: #                             using manually defined categories (i.e., not
1.407     raeburn  4266: #                             self-cataloging based on on institutional code).   
1.404     raeburn  4267: #                 showhidden - include course in results even if course  
1.407     raeburn  4268: #                              was set to be excluded from course catalog (DC only).
1.404     raeburn  4269: #                 caller -  if set to 'coursecatalog', courses set to be hidden
                   4270: #                           from course catalog will be excluded from results (unless
                   4271: #                           overridden by "showhidden".
1.427     raeburn  4272: #                 cloner - escaped username:domain of course cloner (if picking course to
1.419     raeburn  4273: #                          clone).
                   4274: #                 cc_clone_list - escaped comma separated list of courses for which 
                   4275: #                                 course cloner has active CC role (and so can clone
                   4276: #                                 automatically).
1.427     raeburn  4277: #                 cloneonly - filter by courses for which cloner has rights to clone.
                   4278: #                 createdbefore - include courses for which creation date preceeded this date.
                   4279: #                 createdafter - include courses for which creation date followed this date.
                   4280: #                 creationcontext - include courses created in specified context 
1.404     raeburn  4281: #
1.445     raeburn  4282: #                 domcloner - flag to indicate if user can create CCs in course's domain.
1.489.2.11  raeburn  4283: #                             If so, ability to clone course is automatic.
                   4284: #                 hasuniquecode - filter by courses for which a six character unique code has
                   4285: #                                 been set.
1.445     raeburn  4286: #
1.234     foxr     4287: #     $client  - The socket open on the client.
                   4288: # Returns:
                   4289: #    1     - Continue processing.
                   4290: # Side Effects:
                   4291: #   a reply is written to $client.
                   4292: sub dump_course_id_handler {
                   4293:     my ($cmd, $tail, $client) = @_;
                   4294:     my $userinput = "$cmd:$tail";
                   4295: 
1.333     raeburn  4296:     my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
1.404     raeburn  4297:         $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
1.427     raeburn  4298:         $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
1.489.2.11  raeburn  4299:         $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
1.397     raeburn  4300:     my $now = time;
1.419     raeburn  4301:     my ($cloneruname,$clonerudom,%cc_clone);
1.234     foxr     4302:     if (defined($description)) {
                   4303: 	$description=&unescape($description);
                   4304:     } else {
                   4305: 	$description='.';
                   4306:     }
1.266     raeburn  4307:     if (defined($instcodefilter)) {
                   4308:         $instcodefilter=&unescape($instcodefilter);
                   4309:     } else {
                   4310:         $instcodefilter='.';
                   4311:     }
1.336     raeburn  4312:     my ($ownerunamefilter,$ownerdomfilter);
1.266     raeburn  4313:     if (defined($ownerfilter)) {
                   4314:         $ownerfilter=&unescape($ownerfilter);
1.336     raeburn  4315:         if ($ownerfilter ne '.' && defined($ownerfilter)) {
                   4316:             if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
                   4317:                  $ownerunamefilter = $1;
                   4318:                  $ownerdomfilter = $2;
                   4319:             } else {
                   4320:                 $ownerunamefilter = $ownerfilter;
                   4321:                 $ownerdomfilter = '';
                   4322:             }
                   4323:         }
1.266     raeburn  4324:     } else {
                   4325:         $ownerfilter='.';
                   4326:     }
1.336     raeburn  4327: 
1.282     raeburn  4328:     if (defined($coursefilter)) {
                   4329:         $coursefilter=&unescape($coursefilter);
                   4330:     } else {
                   4331:         $coursefilter='.';
                   4332:     }
1.333     raeburn  4333:     if (defined($typefilter)) {
                   4334:         $typefilter=&unescape($typefilter);
                   4335:     } else {
                   4336:         $typefilter='.';
                   4337:     }
1.344     raeburn  4338:     if (defined($regexp_ok)) {
                   4339:         $regexp_ok=&unescape($regexp_ok);
                   4340:     }
1.401     raeburn  4341:     if (defined($catfilter)) {
                   4342:         $catfilter=&unescape($catfilter);
                   4343:     }
1.419     raeburn  4344:     if (defined($cloner)) {
                   4345:         $cloner = &unescape($cloner);
                   4346:         ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/); 
                   4347:     }
                   4348:     if (defined($cc_clone_list)) {
                   4349:         $cc_clone_list = &unescape($cc_clone_list);
                   4350:         my @cc_cloners = split('&',$cc_clone_list);
                   4351:         foreach my $cid (@cc_cloners) {
                   4352:             my ($clonedom,$clonenum) = split(':',$cid);
                   4353:             next if ($clonedom ne $udom); 
                   4354:             $cc_clone{$clonedom.'_'.$clonenum} = 1;
                   4355:         } 
                   4356:     }
1.431     raeburn  4357:     if ($createdbefore ne '') {
1.427     raeburn  4358:         $createdbefore = &unescape($createdbefore);
                   4359:     } else {
                   4360:        $createdbefore = 0;
                   4361:     }
1.431     raeburn  4362:     if ($createdafter ne '') {
1.427     raeburn  4363:         $createdafter = &unescape($createdafter);
                   4364:     } else {
                   4365:         $createdafter = 0;
                   4366:     }
1.431     raeburn  4367:     if ($creationcontext ne '') {
1.427     raeburn  4368:         $creationcontext = &unescape($creationcontext);
                   4369:     } else {
                   4370:         $creationcontext = '.';
                   4371:     }
1.489.2.11  raeburn  4372:     unless ($hasuniquecode) {
                   4373:         $hasuniquecode = '.';
                   4374:     }
1.384     raeburn  4375:     my $unpack = 1;
1.485     raeburn  4376:     if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' && 
1.384     raeburn  4377:         $typefilter eq '.') {
                   4378:         $unpack = 0;
                   4379:     }
                   4380:     if (!defined($since)) { $since=0; }
1.234     foxr     4381:     my $qresult='';
                   4382:     my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
                   4383:     if ($hashref) {
1.384     raeburn  4384: 	while (my ($key,$value) = each(%$hashref)) {
1.397     raeburn  4385:             my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
1.427     raeburn  4386:                 %unesc_val,$selfenroll_end,$selfenroll_types,$created,
                   4387:                 $context);
1.384     raeburn  4388:             $unesc_key = &unescape($key);
                   4389:             if ($unesc_key =~ /^lasttime:/) {
                   4390:                 next;
                   4391:             } else {
                   4392:                 $lasttime_key = &escape('lasttime:'.$unesc_key);
                   4393:             }
                   4394:             if ($hashref->{$lasttime_key} ne '') {
                   4395:                 $lasttime = $hashref->{$lasttime_key};
                   4396:                 next if ($lasttime<$since);
                   4397:             }
1.419     raeburn  4398:             my ($canclone,$valchange);
1.384     raeburn  4399:             my $items = &Apache::lonnet::thaw_unescape($value);
                   4400:             if (ref($items) eq 'HASH') {
1.429     raeburn  4401:                 if ($hashref->{$lasttime_key} eq '') {
1.430     raeburn  4402:                     next if ($since > 1);
1.429     raeburn  4403:                 }
1.384     raeburn  4404:                 $is_hash =  1;
1.445     raeburn  4405:                 if ($domcloner) {
                   4406:                     $canclone = 1;
                   4407:                 } elsif (defined($clonerudom)) {
1.419     raeburn  4408:                     if ($items->{'cloners'}) {
                   4409:                         my @cloneable = split(',',$items->{'cloners'});
                   4410:                         if (@cloneable) {
                   4411:                             if (grep(/^\*$/,@cloneable))  {
                   4412:                                 $canclone = 1;
                   4413:                             } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
                   4414:                                 $canclone = 1;
                   4415:                             } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
                   4416:                                 $canclone = 1;
                   4417:                             }
                   4418:                         }
                   4419:                         unless ($canclone) {
                   4420:                             if ($cloneruname ne '' && $clonerudom ne '') {
                   4421:                                 if ($cc_clone{$unesc_key}) {
                   4422:                                     $canclone = 1;
                   4423:                                     $items->{'cloners'} .= ','.$cloneruname.':'.
                   4424:                                                            $clonerudom;
                   4425:                                     $valchange = 1;
                   4426:                                 }
                   4427:                             }
                   4428:                         }
                   4429:                     } elsif (defined($cloneruname)) {
                   4430:                         if ($cc_clone{$unesc_key}) {
                   4431:                             $canclone = 1;
                   4432:                             $items->{'cloners'} = $cloneruname.':'.$clonerudom;
                   4433:                             $valchange = 1;
                   4434:                         }
1.437     raeburn  4435:                         unless ($canclone) {
                   4436:                             if ($items->{'owner'} =~ /:/) {
                   4437:                                 if ($items->{'owner'} eq $cloner) {
                   4438:                                     $canclone = 1;
                   4439:                                 }
1.444     raeburn  4440:                             } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
1.437     raeburn  4441:                                 $canclone = 1;
                   4442:                             }
                   4443:                             if ($canclone) {
                   4444:                                 $items->{'cloners'} = $cloneruname.':'.$clonerudom;
                   4445:                                 $valchange = 1;
                   4446:                             }
                   4447:                         }
1.419     raeburn  4448:                     }
                   4449:                 }
1.384     raeburn  4450:                 if ($unpack || !$rtn_as_hash) {
                   4451:                     $unesc_val{'descr'} = $items->{'description'};
                   4452:                     $unesc_val{'inst_code'} = $items->{'inst_code'};
                   4453:                     $unesc_val{'owner'} = $items->{'owner'};
                   4454:                     $unesc_val{'type'} = $items->{'type'};
1.419     raeburn  4455:                     $unesc_val{'cloners'} = $items->{'cloners'};
1.427     raeburn  4456:                     $unesc_val{'created'} = $items->{'created'};
                   4457:                     $unesc_val{'context'} = $items->{'context'};
1.404     raeburn  4458:                 }
                   4459:                 $selfenroll_types = $items->{'selfenroll_types'};
                   4460:                 $selfenroll_end = $items->{'selfenroll_end_date'};
1.427     raeburn  4461:                 $created = $items->{'created'};
                   4462:                 $context = $items->{'context'};
1.489.2.11  raeburn  4463:                 if ($hasuniquecode ne '.') {
                   4464:                     next unless ($items->{'uniquecode'});
                   4465:                 }
1.404     raeburn  4466:                 if ($selfenrollonly) {
                   4467:                     next if (!$selfenroll_types);
                   4468:                     if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
                   4469:                         next;
1.397     raeburn  4470:                     }
1.404     raeburn  4471:                 }
1.427     raeburn  4472:                 if ($creationcontext ne '.') {
                   4473:                     next if (($context ne '') && ($context ne $creationcontext));  
                   4474:                 }
                   4475:                 if ($createdbefore > 0) {
                   4476:                     next if (($created eq '') || ($created > $createdbefore));   
                   4477:                 }
                   4478:                 if ($createdafter > 0) {
                   4479:                     next if (($created eq '') || ($created <= $createdafter)); 
                   4480:                 }
1.404     raeburn  4481:                 if ($catfilter ne '') {
1.406     raeburn  4482:                     next if ($items->{'categories'} eq '');
                   4483:                     my @categories = split('&',$items->{'categories'}); 
1.407     raeburn  4484:                     next if (@categories == 0);
                   4485:                     my @subcats = split('&',$catfilter);
                   4486:                     my $matchcat = 0;
                   4487:                     foreach my $cat (@categories) {
                   4488:                         if (grep(/^\Q$cat\E$/,@subcats)) {
                   4489:                             $matchcat = 1;
                   4490:                             last;
                   4491:                         }
                   4492:                     }
                   4493:                     next if (!$matchcat);
1.404     raeburn  4494:                 }
                   4495:                 if ($caller eq 'coursecatalog') {
1.405     raeburn  4496:                     if ($items->{'hidefromcat'} eq 'yes') {
                   4497:                         next if !$showhidden;
1.401     raeburn  4498:                     }
1.384     raeburn  4499:                 }
1.383     raeburn  4500:             } else {
1.401     raeburn  4501:                 next if ($catfilter ne '');
1.419     raeburn  4502:                 next if ($selfenrollonly);
1.427     raeburn  4503:                 next if ($createdbefore || $createdafter);
                   4504:                 next if ($creationcontext ne '.');
1.419     raeburn  4505:                 if ((defined($clonerudom)) && (defined($cloneruname)))  {
                   4506:                     if ($cc_clone{$unesc_key}) {
                   4507:                         $canclone = 1;
                   4508:                         $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
                   4509:                     }
                   4510:                 }
1.384     raeburn  4511:                 $is_hash =  0;
1.388     raeburn  4512:                 my @courseitems = split(/:/,$value);
1.403     raeburn  4513:                 $lasttime = pop(@courseitems);
1.402     raeburn  4514:                 if ($hashref->{$lasttime_key} eq '') {
                   4515:                     next if ($lasttime<$since);
                   4516:                 }
1.384     raeburn  4517: 	        ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
1.383     raeburn  4518:             }
1.419     raeburn  4519:             if ($cloneonly) {
                   4520:                next unless ($canclone);
                   4521:             }
1.266     raeburn  4522:             my $match = 1;
1.384     raeburn  4523: 	    if ($description ne '.') {
                   4524:                 if (!$is_hash) {
                   4525:                     $unesc_val{'descr'} = &unescape($val{'descr'});
                   4526:                 }
                   4527:                 if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
1.266     raeburn  4528:                     $match = 0;
1.384     raeburn  4529:                 }
1.266     raeburn  4530:             }
1.384     raeburn  4531:             if ($instcodefilter ne '.') {
                   4532:                 if (!$is_hash) {
                   4533:                     $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
                   4534:                 }
1.418     raeburn  4535:                 if ($regexp_ok == 1) {
1.384     raeburn  4536:                     if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
1.344     raeburn  4537:                         $match = 0;
                   4538:                     }
1.418     raeburn  4539:                 } elsif ($regexp_ok == -1) {
                   4540:                     if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
                   4541:                         $match = 0;
                   4542:                     }
1.344     raeburn  4543:                 } else {
1.384     raeburn  4544:                     if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
1.344     raeburn  4545:                         $match = 0;
                   4546:                     }
1.266     raeburn  4547:                 }
1.234     foxr     4548: 	    }
1.384     raeburn  4549:             if ($ownerfilter ne '.') {
                   4550:                 if (!$is_hash) {
                   4551:                     $unesc_val{'owner'} = &unescape($val{'owner'});
                   4552:                 }
1.336     raeburn  4553:                 if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
1.384     raeburn  4554:                     if ($unesc_val{'owner'} =~ /:/) {
                   4555:                         if (eval{$unesc_val{'owner'} !~ 
                   4556:                              /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
1.336     raeburn  4557:                             $match = 0;
                   4558:                         } 
                   4559:                     } else {
1.384     raeburn  4560:                         if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336     raeburn  4561:                             $match = 0;
                   4562:                         }
                   4563:                     }
                   4564:                 } elsif ($ownerunamefilter ne '') {
1.384     raeburn  4565:                     if ($unesc_val{'owner'} =~ /:/) {
                   4566:                         if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
1.336     raeburn  4567:                              $match = 0;
                   4568:                         }
                   4569:                     } else {
1.384     raeburn  4570:                         if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336     raeburn  4571:                             $match = 0;
                   4572:                         }
                   4573:                     }
                   4574:                 } elsif ($ownerdomfilter ne '') {
1.384     raeburn  4575:                     if ($unesc_val{'owner'} =~ /:/) {
                   4576:                         if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
1.336     raeburn  4577:                              $match = 0;
                   4578:                         }
                   4579:                     } else {
                   4580:                         if ($ownerdomfilter ne $udom) {
                   4581:                             $match = 0;
                   4582:                         }
                   4583:                     }
1.266     raeburn  4584:                 }
                   4585:             }
1.384     raeburn  4586:             if ($coursefilter ne '.') {
                   4587:                 if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
1.282     raeburn  4588:                     $match = 0;
                   4589:                 }
                   4590:             }
1.384     raeburn  4591:             if ($typefilter ne '.') {
                   4592:                 if (!$is_hash) {
                   4593:                     $unesc_val{'type'} = &unescape($val{'type'});
                   4594:                 }
                   4595:                 if ($unesc_val{'type'} eq '') {
1.333     raeburn  4596:                     if ($typefilter ne 'Course') {
                   4597:                         $match = 0;
                   4598:                     }
1.383     raeburn  4599:                 } else {
1.384     raeburn  4600:                     if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
1.333     raeburn  4601:                         $match = 0;
                   4602:                     }
                   4603:                 }
                   4604:             }
1.266     raeburn  4605:             if ($match == 1) {
1.384     raeburn  4606:                 if ($rtn_as_hash) {
                   4607:                     if ($is_hash) {
1.419     raeburn  4608:                         if ($valchange) {
                   4609:                             my $newvalue = &Apache::lonnet::freeze_escape($items);
                   4610:                             $qresult.=$key.'='.$newvalue.'&';
                   4611:                         } else {
                   4612:                             $qresult.=$key.'='.$value.'&';
                   4613:                         }
1.384     raeburn  4614:                     } else {
1.388     raeburn  4615:                         my %rtnhash = ( 'description' => &unescape($val{'descr'}),
                   4616:                                         'inst_code' => &unescape($val{'inst_code'}),
                   4617:                                         'owner'     => &unescape($val{'owner'}),
                   4618:                                         'type'      => &unescape($val{'type'}),
1.419     raeburn  4619:                                         'cloners'   => &unescape($val{'cloners'}),
1.384     raeburn  4620:                                       );
                   4621:                         my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
                   4622:                         $qresult.=$key.'='.$items.'&';
                   4623:                     }
1.383     raeburn  4624:                 } else {
1.384     raeburn  4625:                     if ($is_hash) {
                   4626:                         $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
                   4627:                                     &escape($unesc_val{'inst_code'}).':'.
                   4628:                                     &escape($unesc_val{'owner'}).'&';
                   4629:                     } else {
                   4630:                         $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
                   4631:                                     ':'.$val{'owner'}.'&';
                   4632:                     }
1.383     raeburn  4633:                 }
1.266     raeburn  4634:             }
1.234     foxr     4635: 	}
1.311     albertel 4636: 	if (&untie_domain_hash($hashref)) {
1.234     foxr     4637: 	    chop($qresult);
1.387     albertel 4638: 	    &Reply($client, \$qresult, $userinput);
1.234     foxr     4639: 	} else {
                   4640: 	    &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   4641: 		    "while attempting courseiddump\n", $userinput);
                   4642: 	}
                   4643:     } else {
                   4644: 	&Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   4645: 		"while attempting courseiddump\n", $userinput);
                   4646:     }
                   4647:     return 1;
                   4648: }
                   4649: &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238     foxr     4650: 
1.438     raeburn  4651: sub course_lastaccess_handler {
                   4652:     my ($cmd, $tail, $client) = @_;
                   4653:     my $userinput = "$cmd:$tail";
                   4654:     my ($cdom,$cnum) = split(':',$tail); 
                   4655:     my (%lastaccess,$qresult);
                   4656:     my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
                   4657:     if ($hashref) {
                   4658:         while (my ($key,$value) = each(%$hashref)) {
                   4659:             my ($unesc_key,$lasttime);
                   4660:             $unesc_key = &unescape($key);
                   4661:             if ($cnum) {
                   4662:                 next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
                   4663:             }
                   4664:             if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
                   4665:                 $lastaccess{$1} = $value;
                   4666:             } else {
                   4667:                 my $items = &Apache::lonnet::thaw_unescape($value);
                   4668:                 if (ref($items) eq 'HASH') {
                   4669:                     unless ($lastaccess{$unesc_key}) {
                   4670:                         $lastaccess{$unesc_key} = '';
                   4671:                     }
                   4672:                 } else {
                   4673:                     my @courseitems = split(':',$value);
                   4674:                     $lastaccess{$unesc_key} = pop(@courseitems);
                   4675:                 }
                   4676:             }
                   4677:         }
                   4678:         foreach my $cid (sort(keys(%lastaccess))) {
                   4679:             $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&'; 
                   4680:         }
                   4681:         if (&untie_domain_hash($hashref)) {
                   4682:             if ($qresult) {
                   4683:                 chop($qresult);
                   4684:             }
                   4685:             &Reply($client, \$qresult, $userinput);
                   4686:         } else {
                   4687:             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   4688:                     "while attempting lastacourseaccess\n", $userinput);
                   4689:         }
                   4690:     } else {
                   4691:         &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   4692:                 "while attempting lastcourseaccess\n", $userinput);
                   4693:     }
                   4694:     return 1;
                   4695: }
                   4696: &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
                   4697: 
1.489.2.36  raeburn  4698: sub course_sessions_handler {
                   4699:     my ($cmd, $tail, $client) = @_;
                   4700:     my $userinput = "$cmd:$tail";
                   4701:     my ($cdom,$cnum,$lastactivity) = split(':',$tail);
                   4702:     my $dbsuffix = '_'.$cdom.'_'.$cnum.'.db';
                   4703:     my (%sessions,$qresult);
                   4704:     my $now=time;
                   4705:     if (opendir(DIR,$perlvar{'lonIDsDir'})) {
                   4706:         my $filename;
                   4707:         while ($filename=readdir(DIR)) {
                   4708:             next if ($filename=~/^\./);
                   4709:             next if ($filename=~/^publicuser_/);
                   4710:             next if ($filename=~/^[a-f0-9]+_(linked|lti_\d+)\.id$/);
1.489.2.37  raeburn  4711:             if ($filename =~ /^($LONCAPA::match_username)_\d+_($LONCAPA::match_domain)_/) {
1.489.2.36  raeburn  4712:                 my ($uname,$udom) = ($1,$2);
1.489.2.37  raeburn  4713:                 next unless (-e "$perlvar{'lonDaemons'}/tmp/$uname$dbsuffix");
1.489.2.36  raeburn  4714:                 my $mtime = (stat("$perlvar{'lonIDsDir'}/$filename"))[9];
                   4715:                 if ($lastactivity < 0) {
1.489.2.38  raeburn  4716:                     next if ($mtime-$now > $lastactivity);
1.489.2.36  raeburn  4717:                 } else {
1.489.2.38  raeburn  4718:                     next if ($now-$mtime > $lastactivity);
1.489.2.36  raeburn  4719:                 }
                   4720:                 $sessions{$uname.':'.$udom} = $mtime;
                   4721:             }
                   4722:         }
                   4723:         closedir(DIR);
                   4724:     }
                   4725:     foreach my $user (keys(%sessions)) {
                   4726:         $qresult.=&escape($user).'='.$sessions{$user}.'&';
                   4727:     }
                   4728:     if ($qresult) {
                   4729:         chop($qresult);
                   4730:     }
                   4731:     &Reply($client, \$qresult, $userinput);
                   4732:     return 1;
                   4733: }
                   4734: &register_handler("coursesessions",\&course_sessions_handler, 0, 1, 0);
                   4735: 
1.238     foxr     4736: #
1.348     raeburn  4737: # Puts an unencrypted entry in a namespace db file at the domain level 
                   4738: #
                   4739: # Parameters:
                   4740: #    $cmd      - The command that got us here.
                   4741: #    $tail     - Tail of the command (remaining parameters).
                   4742: #    $client   - File descriptor connected to client.
                   4743: # Returns
                   4744: #     0        - Requested to exit, caller should shut down.
                   4745: #     1        - Continue processing.
                   4746: #  Side effects:
                   4747: #     reply is written to $client.
                   4748: #
                   4749: sub put_domain_handler {
                   4750:     my ($cmd,$tail,$client) = @_;
                   4751: 
                   4752:     my $userinput = "$cmd:$tail";
                   4753: 
                   4754:     my ($udom,$namespace,$what) =split(/:/,$tail,3);
                   4755:     chomp($what);
                   4756:     my @pairs=split(/\&/,$what);
                   4757:     my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
                   4758:                                    "P", $what);
                   4759:     if ($hashref) {
                   4760:         foreach my $pair (@pairs) {
                   4761:             my ($key,$value)=split(/=/,$pair);
                   4762:             $hashref->{$key}=$value;
                   4763:         }
                   4764:         if (&untie_domain_hash($hashref)) {
                   4765:             &Reply($client, "ok\n", $userinput);
                   4766:         } else {
                   4767:             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   4768:                      "while attempting putdom\n", $userinput);
                   4769:         }
                   4770:     } else {
                   4771:         &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   4772:                   "while attempting putdom\n", $userinput);
                   4773:     }
                   4774: 
                   4775:     return 1;
                   4776: }
                   4777: &register_handler("putdom", \&put_domain_handler, 0, 1, 0);
                   4778: 
                   4779: # Unencrypted get from the namespace database file at the domain level.
                   4780: # This function retrieves a keyed item from a specific named database in the
                   4781: # domain directory.
                   4782: #
                   4783: # Parameters:
1.489.2.40  raeburn  4784: #   $cmd             - Command request keyword (getdom).
1.348     raeburn  4785: #   $tail            - Tail of the command.  This is a colon separated list
                   4786: #                      consisting of the domain and the 'namespace' 
                   4787: #                      which selects the gdbm file to do the lookup in,
                   4788: #                      & separated list of keys to lookup.  Note that
                   4789: #                      the values are returned as an & separated list too.
                   4790: #   $client          - File descriptor open on the client.
                   4791: # Returns:
                   4792: #   1       - Continue processing.
                   4793: #   0       - Exit.
                   4794: #  Side effects:
                   4795: #     reply is written to $client.
                   4796: #
                   4797: 
                   4798: sub get_domain_handler {
                   4799:     my ($cmd, $tail, $client) = @_;
                   4800: 
1.489.2.34  raeburn  4801:     my $userinput = "$cmd:$tail";
1.348     raeburn  4802: 
                   4803:     my ($udom,$namespace,$what)=split(/:/,$tail,3);
1.489.2.43.2.  (raeburn 4804:):     if (($namespace =~ /^enc/) || ($namespace eq 'private')) {
                   4805:):         &Failure( $client, "refused\n", $userinput);
                   4806:):     } else {
                   4807:):         my $res = LONCAPA::Lond::get_dom($userinput);
                   4808:):         if ($res =~ /^error:/) {
                   4809:):             &Failure($client, \$res, $userinput);
                   4810:):         } else {
                   4811:):             &Reply($client, \$res, $userinput);
                   4812:):         }
                   4813:):     }
                   4814:): 
                   4815:):     return 1;
                   4816:): }
                   4817:): &register_handler("getdom", \&get_domain_handler, 0, 1, 0);
                   4818:): 
                   4819:): sub encrypted_get_domain_handler {
                   4820:):     my ($cmd, $tail, $client) = @_;
                   4821:): 
                   4822:):     my $userinput = "$cmd:$tail";
                   4823:): 
                   4824:):     my ($udom,$namespace,$what) = split(/:/,$tail,3);
                   4825:):     if ($namespace eq 'private') {
                   4826:):         &Failure( $client, "refused\n", $userinput);
1.348     raeburn  4827:     } else {
1.489.2.43.2.  (raeburn 4828:):         my $res = LONCAPA::Lond::get_dom($userinput);
                   4829:):         if ($res =~ /^error:/) {
                   4830:):             &Failure($client, \$res, $userinput);
                   4831:):         } else {
                   4832:):             if ($cipher) {
                   4833:):                 my $cmdlength=length($res);
                   4834:):                 $res.="         ";
                   4835:):                 my $encres='';
                   4836:):                 for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   4837:):                     $encres.= unpack("H16",
                   4838:):                                      $cipher->encrypt(substr($res,
                   4839:):                                                              $encidx,
                   4840:):                                                              8)));
                   4841:):                 }
                   4842:):                 &Reply( $client,"enc:$cmdlength:$encres\n",$userinput);
                   4843:):             } else {
                   4844:):                 &Failure( $client, "error:no_key\n",$userinput);
                   4845:):             }
                   4846:):         }
1.348     raeburn  4847:     }
                   4848:     return 1;
                   4849: }
1.489.2.43.2.  (raeburn 4850:): &register_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0);
1.348     raeburn  4851: 
1.420     raeburn  4852: #
1.489.2.43.2.  (raeburn 4853:): # Encrypted get from the namespace database file at the domain level.
                   4854:): # This function retrieves a keyed item from a specific named database in the
                   4855:): # domain directory.
                   4856:): #
                   4857:): # Parameters:
                   4858:): #   $cmd             - Command request keyword (lti).
                   4859:): #   $tail            - Tail of the command.  This is a colon-separated list
                   4860:): #                      consisting of the domain, coursenum, if for LTI-
                   4861:): #                      enabled deep-linking to course content using
                   4862:): #                      link protection configured within a course,
                   4863:): #                      context (=deeplink) if for LTI-enabled deep-linking
                   4864:): #                      to course content using LTI Provider settings
                   4865:): #                      configured within a course's domain, the (escaped)
                   4866:): #                      launch URL, the (escaped) method (typically POST),
                   4867:): #                      and a frozen hash of the LTI launch parameters
                   4868:): #                      from the LTI payload.
                   4869:): #   $client          - File descriptor open on the client.
                   4870:): # Returns:
                   4871:): #   1       - Continue processing.
                   4872:): #   0       - Exit.
                   4873:): #  Side effects:
                   4874:): #     The reply will contain an LTI itemID, if the signed LTI payload
                   4875:): #     could be verified using the consumer key and the shared secret
                   4876:): #     available for that key (for the itemID) for either the course or domain,
                   4877:): #     depending on values for cnum and context. The reply is encrypted before
                   4878:): #     being written to $client.
                   4879:): #
                   4880:): sub lti_handler {
                   4881:):     my ($cmd, $tail, $client) = @_;
                   4882:): 
                   4883:):     my $userinput = "$cmd:$tail";
                   4884:): 
                   4885:):     my ($cdom,$cnum,$context,$escurl,$escmethod,$items) = split(/:/,$tail);
                   4886:):     my $url = &unescape($escurl);
                   4887:):     my $method = &unescape($escmethod);
                   4888:):     my $params = &Apache::lonnet::thaw_unescape($items);
                   4889:):     my $res;
                   4890:):     if ($cnum ne '') {
                   4891:):         $res = &LONCAPA::Lond::crslti_itemid($cdom,$cnum,$url,$method,$params,$perlvar{'lonVersion'});
                   4892:):     } else {
                   4893:):         $res = &LONCAPA::Lond::domlti_itemid($cdom,$context,$url,$method,$params,$perlvar{'lonVersion'});
                   4894:):     }
                   4895:):     if ($res =~ /^error:/) {
                   4896:):         &Failure($client, \$res, $userinput);
                   4897:):     } else {
                   4898:):         if ($cipher) {
                   4899:):             my $cmdlength=length($res);
                   4900:):             $res.="         ";
                   4901:):             my $encres='';
                   4902:):             for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   4903:):                 $encres.= unpack("H16",
                   4904:):                                  $cipher->encrypt(substr($res,
                   4905:):                                                          $encidx,
                   4906:):                                                          8)));
                   4907:):             }
                   4908:):             &Reply( $client,"enc:$cmdlength:$encres\n",$userinput);
                   4909:):         } else {
                   4910:):             &Failure( $client, "error:no_key\n",$userinput);
                   4911:):         }
                   4912:):     }
                   4913:):     return 1;
                   4914:): }
                   4915:): &register_handler("lti", \&lti_handler, 1, 1, 0);
                   4916:): 
                   4917:): #
                   4918:): # Data for LTI payload (received encrypted) are unencrypted and
                   4919:): # then signed with the appropriate key and secret, before re-encrypting
                   4920:): # the signed payload which is sent to the client for unencryption by
                   4921:): # the caller: lonnet::sign_lti()) before dispatch either to a web browser
                   4922:): # (launch) or to a remote web service (roster, logout, or grade).
                   4923:): #
                   4924:): # Parameters:
                   4925:): #   $cmd             - Command request keyword (signlti).
                   4926:): #   $tail            - Tail of the command.  This is a colon-separated list
                   4927:): #                      consisting of the domain, coursenum (if for an External
                   4928:): #                      Tool defined in a course), crsdef (true if defined in
                   4929:): #                      a course), type (linkprot or lti),
                   4930:): #                      context (launch, roster, logout, or grade),
                   4931:): #                      escaped launch URL, numeric ID of external tool,
                   4932:): #                      version number for encryption key (if tool's LTI secret was
                   4933:): #                      encrypted before storing), a frozen hash of LTI launch
                   4934:): #                      parameters, and a frozen hash of LTI information,
                   4935:): #                      (e.g., method => 'HMAC-SHA1',
                   4936:): #                             respfmt => 'to_authorization_header').
                   4937:): #   $client          - File descriptor open on the client.
                   4938:): # Returns:
                   4939:): #   1       - Continue processing.
                   4940:): #   0       - Exit.
                   4941:): #  Side effects:
                   4942:): #     The reply will contain the LTI payload, as & separated key=value pairs,
                   4943:): #     where value is itself a frozen hash, if the required key and secret
                   4944:): #     for the specific tool ID are available. The payload data are retrieved from
                   4945:): #     a call to Lond::sign_lti_payload(), and the reply is encrypted before being
                   4946:): #     written to $client.
                   4947:): #
                   4948:): sub sign_lti_handler {
                   4949:):     my ($cmd, $tail, $client) = @_;
                   4950:): 
                   4951:):     my $userinput = "$cmd:$tail";
                   4952:): 
                   4953:):     my ($cdom,$cnum,$crsdef,$type,$context,$escurl,
                   4954:):         $ltinum,$keynum,$paramsref,$inforef) = split(/:/,$tail);
                   4955:):     my $url = &unescape($escurl);
                   4956:):     my $params = &Apache::lonnet::thaw_unescape($paramsref);
                   4957:):     my $info = &Apache::lonnet::thaw_unescape($inforef);
                   4958:):     my $res =
                   4959:):         &LONCAPA::Lond::sign_lti_payload($cdom,$cnum,$crsdef,$type,$context,$url,$ltinum,
                   4960:):                                          $keynum,$perlvar{'lonVersion'},$params,$info);
                   4961:):     my $result;
                   4962:):     if (ref($res) eq 'HASH') {
                   4963:):         foreach my $key (keys(%{$res})) {
                   4964:):             $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($res->{$key}).'&';
                   4965:):         }
                   4966:):         $result =~ s/\&$//;
                   4967:):     } else {
                   4968:):         $result = $res;
                   4969:):     }
                   4970:):     if ($result =~ /^error:/) {
                   4971:):         &Failure($client, \$result, $userinput);
                   4972:):     } else {
                   4973:):         if ($cipher) {
                   4974:):             my $cmdlength=length($result);
                   4975:):             $result.="         ";
                   4976:):             my $encres='';
                   4977:):             for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   4978:):                 $encres.= unpack("H16",
                   4979:):                                  $cipher->encrypt(substr($result,
                   4980:):                                                          $encidx,
                   4981:):                                                          8)));
                   4982:):             }
                   4983:):             &Reply( $client,"enc:$cmdlength:$encres\n",$userinput);
                   4984:):         } else {
                   4985:):             &Failure( $client, "error:no_key\n",$userinput);
                   4986:):         }
                   4987:):     }
                   4988:):     return 1;
                   4989:): }
                   4990:): &register_handler("signlti", \&sign_lti_handler, 1, 1, 0);
                   4991:): 
                   4992:): #
1.238     foxr     4993: #  Puts an id to a domains id database. 
                   4994: #
                   4995: #  Parameters:
                   4996: #   $cmd     - The command that triggered us.
                   4997: #   $tail    - Remainder of the request other than the command. This is a 
                   4998: #              colon separated list containing:
                   4999: #              $domain  - The domain for which we are writing the id.
                   5000: #              $pairs  - The id info to write... this is and & separated list
                   5001: #                        of keyword=value.
                   5002: #   $client  - Socket open on the client.
                   5003: #  Returns:
                   5004: #    1   - Continue processing.
                   5005: #  Side effects:
                   5006: #     reply is written to $client.
                   5007: #
                   5008: sub put_id_handler {
                   5009:     my ($cmd,$tail,$client) = @_;
                   5010: 
                   5011: 
                   5012:     my $userinput = "$cmd:$tail";
                   5013: 
                   5014:     my ($udom,$what)=split(/:/,$tail);
                   5015:     chomp($what);
                   5016:     my @pairs=split(/\&/,$what);
                   5017:     my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
                   5018: 				   "P", $what);
                   5019:     if ($hashref) {
                   5020: 	foreach my $pair (@pairs) {
                   5021: 	    my ($key,$value)=split(/=/,$pair);
                   5022: 	    $hashref->{$key}=$value;
                   5023: 	}
1.311     albertel 5024: 	if (&untie_domain_hash($hashref)) {
1.238     foxr     5025: 	    &Reply($client, "ok\n", $userinput);
                   5026: 	} else {
                   5027: 	    &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   5028: 		     "while attempting idput\n", $userinput);
                   5029: 	}
                   5030:     } else {
                   5031: 	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   5032: 		  "while attempting idput\n", $userinput);
                   5033:     }
                   5034: 
                   5035:     return 1;
                   5036: }
1.263     albertel 5037: &register_handler("idput", \&put_id_handler, 0, 1, 0);
1.238     foxr     5038: 
                   5039: #
                   5040: #  Retrieves a set of id values from the id database.
                   5041: #  Returns an & separated list of results, one for each requested id to the
                   5042: #  client.
                   5043: #
                   5044: # Parameters:
                   5045: #   $cmd       - Command keyword that caused us to be dispatched.
                   5046: #   $tail      - Tail of the command.  Consists of a colon separated:
                   5047: #               domain - the domain whose id table we dump
                   5048: #               ids      Consists of an & separated list of
                   5049: #                        id keywords whose values will be fetched.
                   5050: #                        nonexisting keywords will have an empty value.
                   5051: #   $client    - Socket open on the client.
                   5052: #
                   5053: # Returns:
                   5054: #    1 - indicating processing should continue.
                   5055: # Side effects:
                   5056: #   An & separated list of results is written to $client.
                   5057: #
                   5058: sub get_id_handler {
                   5059:     my ($cmd, $tail, $client) = @_;
                   5060: 
                   5061:     
                   5062:     my $userinput = "$client:$tail";
                   5063:     
                   5064:     my ($udom,$what)=split(/:/,$tail);
                   5065:     chomp($what);
                   5066:     my @queries=split(/\&/,$what);
                   5067:     my $qresult='';
                   5068:     my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
                   5069:     if ($hashref) {
                   5070: 	for (my $i=0;$i<=$#queries;$i++) {
                   5071: 	    $qresult.="$hashref->{$queries[$i]}&";
                   5072: 	}
1.311     albertel 5073: 	if (&untie_domain_hash($hashref)) {
1.238     foxr     5074: 	    $qresult=~s/\&$//;
1.387     albertel 5075: 	    &Reply($client, \$qresult, $userinput);
1.238     foxr     5076: 	} else {
                   5077: 	    &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
                   5078: 		      "while attempting idget\n",$userinput);
                   5079: 	}
                   5080:     } else {
                   5081: 	&Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   5082: 		 "while attempting idget\n",$userinput);
                   5083:     }
                   5084:     
                   5085:     return 1;
                   5086: }
1.263     albertel 5087: &register_handler("idget", \&get_id_handler, 0, 1, 0);
1.238     foxr     5088: 
1.489.2.7  raeburn  5089: #   Deletes one or more ids in a domain's id database.
1.489.2.6  raeburn  5090: #
                   5091: #   Parameters:
                   5092: #       $cmd                  - Command keyword (iddel).
                   5093: #       $tail                 - Command tail.  In this case a colon
                   5094: #                               separated list containing:
                   5095: #                               The domain for which we are deleting the id(s).
                   5096: #                               &-separated list of id(s) to delete.
                   5097: #       $client               - File open on client socket.
                   5098: # Returns:
                   5099: #     1   - Continue processing
                   5100: #     0   - Exit server.
                   5101: #
                   5102: #
                   5103: 
                   5104: sub del_id_handler {
                   5105:     my ($cmd,$tail,$client) = @_;
                   5106: 
                   5107:     my $userinput = "$cmd:$tail";
                   5108: 
                   5109:     my ($udom,$what)=split(/:/,$tail);
                   5110:     chomp($what);
                   5111:     my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
                   5112:                                    "D", $what);
                   5113:     if ($hashref) {
                   5114:         my @keys=split(/\&/,$what);
                   5115:         foreach my $key (@keys) {
                   5116:             delete($hashref->{$key});
                   5117:         }
                   5118:         if (&untie_user_hash($hashref)) {
                   5119:             &Reply($client, "ok\n", $userinput);
                   5120:         } else {
                   5121:             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   5122:                     "while attempting iddel\n", $userinput);
                   5123:         }
                   5124:     } else {
                   5125:         &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   5126:                  "while attempting iddel\n", $userinput);
                   5127:     }
                   5128:     return 1;
                   5129: }
                   5130: &register_handler("iddel", \&del_id_handler, 0, 1, 0);
                   5131: 
1.238     foxr     5132: #
1.299     raeburn  5133: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 
                   5134: #
                   5135: # Parameters
                   5136: #   $cmd       - Command keyword that caused us to be dispatched.
                   5137: #   $tail      - Tail of the command.  Consists of a colon separated:
                   5138: #               domain - the domain whose dcmail we are recording
                   5139: #               email    Consists of key=value pair 
                   5140: #                        where key is unique msgid
                   5141: #                        and value is message (in XML)
                   5142: #   $client    - Socket open on the client.
                   5143: #
                   5144: # Returns:
                   5145: #    1 - indicating processing should continue.
                   5146: # Side effects
                   5147: #     reply is written to $client.
                   5148: #
                   5149: sub put_dcmail_handler {
                   5150:     my ($cmd,$tail,$client) = @_;
                   5151:     my $userinput = "$cmd:$tail";
1.463     foxr     5152: 
                   5153: 
1.299     raeburn  5154:     my ($udom,$what)=split(/:/,$tail);
                   5155:     chomp($what);
                   5156:     my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
                   5157:     if ($hashref) {
                   5158:         my ($key,$value)=split(/=/,$what);
                   5159:         $hashref->{$key}=$value;
                   5160:     }
1.311     albertel 5161:     if (&untie_domain_hash($hashref)) {
1.299     raeburn  5162:         &Reply($client, "ok\n", $userinput);
                   5163:     } else {
                   5164:         &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   5165:                  "while attempting dcmailput\n", $userinput);
                   5166:     }
                   5167:     return 1;
                   5168: }
                   5169: &register_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
                   5170: 
                   5171: #
                   5172: # Retrieves broadcast e-mail from nohist_dcmail database
                   5173: # Returns to client an & separated list of key=value pairs,
                   5174: # where key is msgid and value is message information.
                   5175: #
                   5176: # Parameters
                   5177: #   $cmd       - Command keyword that caused us to be dispatched.
                   5178: #   $tail      - Tail of the command.  Consists of a colon separated:
                   5179: #               domain - the domain whose dcmail table we dump
                   5180: #               startfilter - beginning of time window 
                   5181: #               endfilter - end of time window
                   5182: #               sendersfilter - & separated list of username:domain 
                   5183: #                 for senders to search for.
                   5184: #   $client    - Socket open on the client.
                   5185: #
                   5186: # Returns:
                   5187: #    1 - indicating processing should continue.
                   5188: # Side effects
                   5189: #     reply (& separated list of msgid=messageinfo pairs) is 
                   5190: #     written to $client.
                   5191: #
                   5192: sub dump_dcmail_handler {
                   5193:     my ($cmd, $tail, $client) = @_;
                   5194:                                                                                 
                   5195:     my $userinput = "$cmd:$tail";
                   5196:     my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
                   5197:     chomp($sendersfilter);
                   5198:     my @senders = ();
                   5199:     if (defined($startfilter)) {
                   5200:         $startfilter=&unescape($startfilter);
                   5201:     } else {
                   5202:         $startfilter='.';
                   5203:     }
                   5204:     if (defined($endfilter)) {
                   5205:         $endfilter=&unescape($endfilter);
                   5206:     } else {
                   5207:         $endfilter='.';
                   5208:     }
                   5209:     if (defined($sendersfilter)) {
                   5210:         $sendersfilter=&unescape($sendersfilter);
1.300     albertel 5211: 	@senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299     raeburn  5212:     }
                   5213: 
                   5214:     my $qresult='';
                   5215:     my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
                   5216:     if ($hashref) {
                   5217:         while (my ($key,$value) = each(%$hashref)) {
                   5218:             my $match = 1;
1.303     albertel 5219:             my ($timestamp,$subj,$uname,$udom) = 
                   5220: 		split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299     raeburn  5221:             $subj = &unescape($subj);
                   5222:             unless ($startfilter eq '.' || !defined($startfilter)) {
                   5223:                 if ($timestamp < $startfilter) {
                   5224:                     $match = 0;
                   5225:                 }
                   5226:             }
                   5227:             unless ($endfilter eq '.' || !defined($endfilter)) {
                   5228:                 if ($timestamp > $endfilter) {
                   5229:                     $match = 0;
                   5230:                 }
                   5231:             }
                   5232:             unless (@senders < 1) {
                   5233:                 unless (grep/^$uname:$udom$/,@senders) {
                   5234:                     $match = 0;
                   5235:                 }
                   5236:             }
                   5237:             if ($match == 1) {
                   5238:                 $qresult.=$key.'='.$value.'&';
                   5239:             }
                   5240:         }
1.311     albertel 5241:         if (&untie_domain_hash($hashref)) {
1.299     raeburn  5242:             chop($qresult);
1.387     albertel 5243:             &Reply($client, \$qresult, $userinput);
1.299     raeburn  5244:         } else {
                   5245:             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   5246:                     "while attempting dcmaildump\n", $userinput);
                   5247:         }
                   5248:     } else {
                   5249:         &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   5250:                 "while attempting dcmaildump\n", $userinput);
                   5251:     }
                   5252:     return 1;
                   5253: }
                   5254: 
                   5255: &register_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
                   5256: 
                   5257: #
                   5258: # Puts domain roles in nohist_domainroles database
                   5259: #
                   5260: # Parameters
                   5261: #   $cmd       - Command keyword that caused us to be dispatched.
                   5262: #   $tail      - Tail of the command.  Consists of a colon separated:
                   5263: #               domain - the domain whose roles we are recording  
                   5264: #               role -   Consists of key=value pair
                   5265: #                        where key is unique role
                   5266: #                        and value is start/end date information
                   5267: #   $client    - Socket open on the client.
                   5268: #
                   5269: # Returns:
                   5270: #    1 - indicating processing should continue.
                   5271: # Side effects
                   5272: #     reply is written to $client.
                   5273: #
                   5274: 
                   5275: sub put_domainroles_handler {
                   5276:     my ($cmd,$tail,$client) = @_;
                   5277: 
                   5278:     my $userinput = "$cmd:$tail";
                   5279:     my ($udom,$what)=split(/:/,$tail);
                   5280:     chomp($what);
                   5281:     my @pairs=split(/\&/,$what);
                   5282:     my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
                   5283:     if ($hashref) {
                   5284:         foreach my $pair (@pairs) {
                   5285:             my ($key,$value)=split(/=/,$pair);
                   5286:             $hashref->{$key}=$value;
                   5287:         }
1.311     albertel 5288:         if (&untie_domain_hash($hashref)) {
1.299     raeburn  5289:             &Reply($client, "ok\n", $userinput);
                   5290:         } else {
                   5291:             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   5292:                      "while attempting domroleput\n", $userinput);
                   5293:         }
                   5294:     } else {
                   5295:         &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                   5296:                   "while attempting domroleput\n", $userinput);
                   5297:     }
                   5298:                                                                                   
                   5299:     return 1;
                   5300: }
                   5301: 
                   5302: &register_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
                   5303: 
                   5304: #
                   5305: # Retrieves domain roles from nohist_domainroles database
                   5306: # Returns to client an & separated list of key=value pairs,
                   5307: # where key is role and value is start and end date information.
                   5308: #
                   5309: # Parameters
                   5310: #   $cmd       - Command keyword that caused us to be dispatched.
                   5311: #   $tail      - Tail of the command.  Consists of a colon separated:
                   5312: #               domain - the domain whose domain roles table we dump
                   5313: #   $client    - Socket open on the client.
                   5314: #
                   5315: # Returns:
                   5316: #    1 - indicating processing should continue.
                   5317: # Side effects
                   5318: #     reply (& separated list of role=start/end info pairs) is
                   5319: #     written to $client.
                   5320: #
                   5321: sub dump_domainroles_handler {
                   5322:     my ($cmd, $tail, $client) = @_;
                   5323:                                                                                            
                   5324:     my $userinput = "$cmd:$tail";
                   5325:     my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
                   5326:     chomp($rolesfilter);
                   5327:     my @roles = ();
                   5328:     if (defined($startfilter)) {
                   5329:         $startfilter=&unescape($startfilter);
                   5330:     } else {
                   5331:         $startfilter='.';
                   5332:     }
                   5333:     if (defined($endfilter)) {
                   5334:         $endfilter=&unescape($endfilter);
                   5335:     } else {
                   5336:         $endfilter='.';
                   5337:     }
                   5338:     if (defined($rolesfilter)) {
                   5339:         $rolesfilter=&unescape($rolesfilter);
1.300     albertel 5340: 	@roles = split(/\&/,$rolesfilter);
1.299     raeburn  5341:     }
1.421     raeburn  5342: 
1.299     raeburn  5343:     my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
                   5344:     if ($hashref) {
                   5345:         my $qresult = '';
                   5346:         while (my ($key,$value) = each(%$hashref)) {
                   5347:             my $match = 1;
1.421     raeburn  5348:             my ($end,$start) = split(/:/,&unescape($value));
1.299     raeburn  5349:             my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
1.421     raeburn  5350:             unless (@roles < 1) {
                   5351:                 unless (grep/^\Q$trole\E$/,@roles) {
                   5352:                     $match = 0;
                   5353:                     next;
                   5354:                 }
                   5355:             }
1.299     raeburn  5356:             unless ($startfilter eq '.' || !defined($startfilter)) {
1.415     raeburn  5357:                 if ((defined($start)) && ($start >= $startfilter)) {
1.299     raeburn  5358:                     $match = 0;
1.421     raeburn  5359:                     next;
1.299     raeburn  5360:                 }
                   5361:             }
                   5362:             unless ($endfilter eq '.' || !defined($endfilter)) {
1.421     raeburn  5363:                 if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
1.299     raeburn  5364:                     $match = 0;
1.421     raeburn  5365:                     next;
1.299     raeburn  5366:                 }
                   5367:             }
                   5368:             if ($match == 1) {
                   5369:                 $qresult.=$key.'='.$value.'&';
                   5370:             }
                   5371:         }
1.311     albertel 5372:         if (&untie_domain_hash($hashref)) {
1.299     raeburn  5373:             chop($qresult);
1.387     albertel 5374:             &Reply($client, \$qresult, $userinput);
1.299     raeburn  5375:         } else {
                   5376:             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                   5377:                     "while attempting domrolesdump\n", $userinput);
                   5378:         }
                   5379:     } else {
                   5380:         &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   5381:                 "while attempting domrolesdump\n", $userinput);
                   5382:     }
                   5383:     return 1;
                   5384: }
                   5385: 
                   5386: &register_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
                   5387: 
                   5388: 
1.238     foxr     5389: #  Process the tmpput command I'm not sure what this does.. Seems to
                   5390: #  create a file in the lonDaemons/tmp directory of the form $id.tmp
                   5391: # where Id is the client's ip concatenated with a sequence number.
                   5392: # The file will contain some value that is passed in.  Is this e.g.
                   5393: # a login token?
                   5394: #
                   5395: # Parameters:
                   5396: #    $cmd     - The command that got us dispatched.
                   5397: #    $tail    - The remainder of the request following $cmd:
                   5398: #               In this case this will be the contents of the file.
                   5399: #    $client  - Socket connected to the client.
                   5400: # Returns:
                   5401: #    1 indicating processing can continue.
                   5402: # Side effects:
                   5403: #   A file is created in the local filesystem.
                   5404: #   A reply is sent to the client.
                   5405: sub tmp_put_handler {
                   5406:     my ($cmd, $what, $client) = @_;
                   5407: 
                   5408:     my $userinput = "$cmd:$what";	# Reconstruct for logging.
                   5409: 
1.347     raeburn  5410:     my ($record,$context) = split(/:/,$what);
                   5411:     if ($context ne '') {
                   5412:         chomp($context);
                   5413:         $context = &unescape($context);
                   5414:     }
                   5415:     my ($id,$store);
1.238     foxr     5416:     $tmpsnum++;
1.489.2.42  raeburn  5417:     my $numtries = 0;
                   5418:     my $execdir=$perlvar{'lonDaemons'};
                   5419:     if (($context eq 'resetpw') || ($context eq 'createaccount') ||
                   5420:         ($context eq 'sso') || ($context eq 'link') || ($context eq 'retry')) {
                   5421:         $id = &md5_hex(&md5_hex(time.{}.rand().$$.$tmpsnum));
                   5422:         while ((-e "$execdir/tmp/$id.tmp") && ($numtries <10)) {
                   5423:             undef($id);
                   5424:             $id = &md5_hex(&md5_hex(time.{}.rand().$$.$tmpsnum));
                   5425:             $numtries ++;
                   5426:         }
1.347     raeburn  5427:     } else {
                   5428:         $id = $$.'_'.$clientip.'_'.$tmpsnum;
                   5429:     }
1.238     foxr     5430:     $id=~s/\W/\_/g;
1.347     raeburn  5431:     $record=~s/\n//g;
1.489.2.42  raeburn  5432:     if (($id ne '') &&
                   5433:         ($store=IO::File->new(">$execdir/tmp/$id.tmp"))) {
1.347     raeburn  5434: 	print $store $record;
1.238     foxr     5435: 	close $store;
1.387     albertel 5436: 	&Reply($client, \$id, $userinput);
1.238     foxr     5437:     } else {
                   5438: 	&Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
                   5439: 		  "while attempting tmpput\n", $userinput);
                   5440:     }
                   5441:     return 1;
                   5442:   
                   5443: }
                   5444: &register_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263     albertel 5445: 
1.238     foxr     5446: #   Processes the tmpget command.  This command returns the contents
                   5447: #  of a temporary resource file(?) created via tmpput.
                   5448: #
                   5449: # Paramters:
                   5450: #    $cmd      - Command that got us dispatched.
                   5451: #    $id       - Tail of the command, contain the id of the resource
                   5452: #                we want to fetch.
                   5453: #    $client   - socket open on the client.
                   5454: # Return:
                   5455: #    1         - Inidcating processing can continue.
                   5456: # Side effects:
                   5457: #   A reply is sent to the client.
                   5458: #
                   5459: sub tmp_get_handler {
                   5460:     my ($cmd, $id, $client) = @_;
                   5461: 
                   5462:     my $userinput = "$cmd:$id"; 
                   5463:     
                   5464: 
                   5465:     $id=~s/\W/\_/g;
                   5466:     my $store;
                   5467:     my $execdir=$perlvar{'lonDaemons'};
                   5468:     if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
                   5469: 	my $reply=<$store>;
1.387     albertel 5470: 	&Reply( $client, \$reply, $userinput);
1.238     foxr     5471: 	close $store;
                   5472:     } else {
                   5473: 	&Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
                   5474: 		  "while attempting tmpget\n", $userinput);
                   5475:     }
                   5476: 
                   5477:     return 1;
                   5478: }
                   5479: &register_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263     albertel 5480: 
1.238     foxr     5481: #
                   5482: #  Process the tmpdel command.  This command deletes a temp resource
                   5483: #  created by the tmpput command.
                   5484: #
                   5485: # Parameters:
                   5486: #   $cmd      - Command that got us here.
                   5487: #   $id       - Id of the temporary resource created.
                   5488: #   $client   - socket open on the client process.
                   5489: #
                   5490: # Returns:
                   5491: #   1     - Indicating processing should continue.
                   5492: # Side Effects:
                   5493: #   A file is deleted
                   5494: #   A reply is sent to the client.
                   5495: sub tmp_del_handler {
                   5496:     my ($cmd, $id, $client) = @_;
                   5497:     
                   5498:     my $userinput= "$cmd:$id";
                   5499:     
                   5500:     chomp($id);
                   5501:     $id=~s/\W/\_/g;
                   5502:     my $execdir=$perlvar{'lonDaemons'};
                   5503:     if (unlink("$execdir/tmp/$id.tmp")) {
                   5504: 	&Reply($client, "ok\n", $userinput);
                   5505:     } else {
                   5506: 	&Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
                   5507: 		  "while attempting tmpdel\n", $userinput);
                   5508:     }
                   5509:     
                   5510:     return 1;
                   5511: 
                   5512: }
                   5513: &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263     albertel 5514: 
1.238     foxr     5515: #
1.489.2.39  raeburn  5516: #  Process the updatebalcookie command.  This command updates a
                   5517: #  cookie in the lonBalancedir directory on a load balancer node.
                   5518: #
                   5519: # Parameters:
                   5520: #   $cmd      - Command that got us here.
                   5521: #   $tail     - Tail of the request (escaped cookie: escaped current entry)
                   5522: #
                   5523: #   $client   - socket open on the client process.
                   5524: #
                   5525: # Returns:
                   5526: #   1     - Indicating processing should continue.
                   5527: # Side Effects:
                   5528: #   A cookie file is updated from the lonBalancedir directory
                   5529: #   A reply is sent to the client.
                   5530: #
                   5531: sub update_balcookie_handler {
                   5532:     my ($cmd, $tail, $client) = @_;
                   5533: 
                   5534:     my $userinput= "$cmd:$tail";
                   5535:     chomp($tail);
                   5536:     my ($cookie,$lastentry) = map { &unescape($_) } (split(/:/,$tail));
                   5537: 
                   5538:     my $updatedone;
                   5539:     if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
                   5540:         my $execdir=$perlvar{'lonBalanceDir'};
                   5541:         if (-e "$execdir/$cookie.id") {
                   5542:             my $doupdate;
                   5543:             if (open(my $fh,'<',"$execdir/$cookie.id")) {
                   5544:                 while (my $line = <$fh>) {
                   5545:                     chomp($line);
                   5546:                     if ($line eq $lastentry) {
                   5547:                         $doupdate = 1;
                   5548:                         last;
                   5549:                     }
                   5550:                 }
                   5551:                 close($fh);
                   5552:             }
                   5553:             if ($doupdate) {
                   5554:                 if (open(my $fh,'>',"$execdir/$cookie.id")) {
                   5555:                     print $fh $clientname;
                   5556:                     close($fh);
                   5557:                     $updatedone = 1;
                   5558:                 }
                   5559:             }
                   5560:         }
                   5561:     }
                   5562:     if ($updatedone) {
                   5563:         &Reply($client, "ok\n", $userinput);
                   5564:     } else {
                   5565:         &Failure( $client, "error: ".($!+0)."file update failed ".
                   5566:                   "while attempting updatebalcookie\n", $userinput);
                   5567:     }
                   5568:     return 1;
                   5569: }
                   5570: &register_handler("updatebalcookie", \&update_balcookie_handler, 0, 1, 0);
                   5571: 
                   5572: #
1.489.2.32  raeburn  5573: #  Process the delbalcookie command. This command deletes a balancer
1.489.2.39  raeburn  5574: #  cookie in the lonBalancedir directory on a load balancer node.
1.489.2.32  raeburn  5575: #
                   5576: # Parameters:
                   5577: #   $cmd      - Command that got us here.
                   5578: #   $cookie   - Cookie to be deleted.
                   5579: #   $client   - socket open on the client process.
                   5580: #
                   5581: # Returns:
                   5582: #   1     - Indicating processing should continue.
                   5583: # Side Effects:
                   5584: #   A cookie file is deleted from the lonBalancedir directory
                   5585: #   A reply is sent to the client.
                   5586: sub del_balcookie_handler {
                   5587:     my ($cmd, $cookie, $client) = @_;
                   5588: 
                   5589:     my $userinput= "$cmd:$cookie";
                   5590: 
                   5591:     chomp($cookie);
1.489.2.39  raeburn  5592:     $cookie = &unescape($cookie);
1.489.2.32  raeburn  5593:     my $deleted = '';
                   5594:     if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
                   5595:         my $execdir=$perlvar{'lonBalanceDir'};
                   5596:         if (-e "$execdir/$cookie.id") {
                   5597:             if (open(my $fh,'<',"$execdir/$cookie.id")) {
                   5598:                 my $dodelete;
                   5599:                 while (my $line = <$fh>) {
                   5600:                     chomp($line);
                   5601:                     if ($line eq $clientname) {
                   5602:                         $dodelete = 1;
                   5603:                         last;
                   5604:                     }
                   5605:                 }
                   5606:                 close($fh);
                   5607:                 if ($dodelete) {
                   5608:                     if (unlink("$execdir/$cookie.id")) {
                   5609:                         $deleted = 1;
                   5610:                     }
                   5611:                 }
                   5612:             }
                   5613:         }
                   5614:     }
                   5615:     if ($deleted) {
                   5616:         &Reply($client, "ok\n", $userinput);
                   5617:     } else {
                   5618:         &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ".
                   5619:                   "while attempting delbalcookie\n", $userinput);
                   5620:     }
                   5621:     return 1;
                   5622: }
                   5623: &register_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0);
                   5624: 
                   5625: #
1.246     foxr     5626: #   Processes the setannounce command.  This command
                   5627: #   creates a file named announce.txt in the top directory of
                   5628: #   the documentn root and sets its contents.  The announce.txt file is
                   5629: #   printed in its entirety at the LonCAPA login page.  Note:
                   5630: #   once the announcement.txt fileis created it cannot be deleted.
                   5631: #   However, setting the contents of the file to empty removes the
                   5632: #   announcement from the login page of loncapa so who cares.
                   5633: #
                   5634: # Parameters:
                   5635: #    $cmd          - The command that got us dispatched.
                   5636: #    $announcement - The text of the announcement.
                   5637: #    $client       - Socket open on the client process.
                   5638: # Retunrns:
                   5639: #   1             - Indicating request processing should continue
                   5640: # Side Effects:
                   5641: #   The file {DocRoot}/announcement.txt is created.
                   5642: #   A reply is sent to $client.
                   5643: #
                   5644: sub set_announce_handler {
                   5645:     my ($cmd, $announcement, $client) = @_;
                   5646:   
                   5647:     my $userinput    = "$cmd:$announcement";
                   5648: 
                   5649:     chomp($announcement);
                   5650:     $announcement=&unescape($announcement);
                   5651:     if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
                   5652: 				'/announcement.txt')) {
                   5653: 	print $store $announcement;
                   5654: 	close $store;
                   5655: 	&Reply($client, "ok\n", $userinput);
                   5656:     } else {
                   5657: 	&Failure($client, "error: ".($!+0)."\n", $userinput);
                   5658:     }
                   5659: 
                   5660:     return 1;
                   5661: }
                   5662: &register_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263     albertel 5663: 
1.246     foxr     5664: #
                   5665: #  Return the version of the daemon.  This can be used to determine
                   5666: #  the compatibility of cross version installations or, alternatively to
                   5667: #  simply know who's out of date and who isn't.  Note that the version
                   5668: #  is returned concatenated with the tail.
                   5669: # Parameters:
                   5670: #   $cmd        - the request that dispatched to us.
                   5671: #   $tail       - Tail of the request (client's version?).
                   5672: #   $client     - Socket open on the client.
                   5673: #Returns:
                   5674: #   1 - continue processing requests.
                   5675: # Side Effects:
                   5676: #   Replies with version to $client.
                   5677: sub get_version_handler {
                   5678:     my ($cmd, $tail, $client) = @_;
                   5679: 
                   5680:     my $userinput  = $cmd.$tail;
                   5681:     
                   5682:     &Reply($client, &version($userinput)."\n", $userinput);
                   5683: 
                   5684: 
                   5685:     return 1;
                   5686: }
                   5687: &register_handler("version", \&get_version_handler, 0, 1, 0);
1.263     albertel 5688: 
1.246     foxr     5689: #  Set the current host and domain.  This is used to support
                   5690: #  multihomed systems.  Each IP of the system, or even separate daemons
                   5691: #  on the same IP can be treated as handling a separate lonCAPA virtual
                   5692: #  machine.  This command selects the virtual lonCAPA.  The client always
                   5693: #  knows the right one since it is lonc and it is selecting the domain/system
                   5694: #  from the hosts.tab file.
                   5695: # Parameters:
                   5696: #    $cmd      - Command that dispatched us.
                   5697: #    $tail     - Tail of the command (domain/host requested).
                   5698: #    $socket   - Socket open on the client.
                   5699: #
                   5700: # Returns:
                   5701: #     1   - Indicates the program should continue to process requests.
                   5702: # Side-effects:
                   5703: #     The default domain/system context is modified for this daemon.
                   5704: #     a reply is sent to the client.
                   5705: #
                   5706: sub set_virtual_host_handler {
                   5707:     my ($cmd, $tail, $socket) = @_;
                   5708:   
                   5709:     my $userinput  ="$cmd:$tail";
                   5710: 
                   5711:     &Reply($client, &sethost($userinput)."\n", $userinput);
                   5712: 
                   5713: 
                   5714:     return 1;
                   5715: }
1.247     albertel 5716: &register_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246     foxr     5717: 
                   5718: #  Process a request to exit:
                   5719: #   - "bye" is sent to the client.
                   5720: #   - The client socket is shutdown and closed.
                   5721: #   - We indicate to the caller that we should exit.
                   5722: # Formal Parameters:
                   5723: #   $cmd                - The command that got us here.
                   5724: #   $tail               - Tail of the command (empty).
                   5725: #   $client             - Socket open on the tail.
                   5726: # Returns:
                   5727: #   0      - Indicating the program should exit!!
                   5728: #
                   5729: sub exit_handler {
                   5730:     my ($cmd, $tail, $client) = @_;
                   5731: 
                   5732:     my $userinput = "$cmd:$tail";
                   5733: 
                   5734:     &logthis("Client $clientip ($clientname) hanging up: $userinput");
                   5735:     &Reply($client, "bye\n", $userinput);
                   5736:     $client->shutdown(2);        # shutdown the socket forcibly.
                   5737:     $client->close();
                   5738: 
                   5739:     return 0;
                   5740: }
1.248     foxr     5741: &register_handler("exit", \&exit_handler, 0,1,1);
                   5742: &register_handler("init", \&exit_handler, 0,1,1);
                   5743: &register_handler("quit", \&exit_handler, 0,1,1);
                   5744: 
                   5745: #  Determine if auto-enrollment is enabled.
                   5746: #  Note that the original had what I believe to be a defect.
                   5747: #  The original returned 0 if the requestor was not a registerd client.
                   5748: #  It should return "refused".
                   5749: # Formal Parameters:
                   5750: #   $cmd       - The command that invoked us.
                   5751: #   $tail      - The tail of the command (Extra command parameters.
                   5752: #   $client    - The socket open on the client that issued the request.
                   5753: # Returns:
                   5754: #    1         - Indicating processing should continue.
                   5755: #
                   5756: sub enrollment_enabled_handler {
                   5757:     my ($cmd, $tail, $client) = @_;
                   5758:     my $userinput = $cmd.":".$tail; # For logging purposes.
                   5759: 
                   5760:     
1.337     albertel 5761:     my ($cdom) = split(/:/, $tail, 2);   # Domain we're asking about.
                   5762: 
1.248     foxr     5763:     my $outcome  = &localenroll::run($cdom);
1.387     albertel 5764:     &Reply($client, \$outcome, $userinput);
1.248     foxr     5765: 
                   5766:     return 1;
                   5767: }
                   5768: &register_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
                   5769: 
1.417     raeburn  5770: #
1.423     raeburn  5771: #   Validate an institutional code used for a LON-CAPA course.          
1.417     raeburn  5772: #
                   5773: # Formal Parameters:
                   5774: #   $cmd          - The command request that got us dispatched.
                   5775: #   $tail         - The tail of the command.  In this case,
                   5776: #                   this is a colon separated set of words that will be split
                   5777: #                   into:
1.424     raeburn  5778: #                        $dom      - The domain for which the check of 
                   5779: #                                    institutional course code will occur.
                   5780: #
                   5781: #                        $instcode - The institutional code for the course
                   5782: #                                    being requested, or validated for rights
                   5783: #                                    to request.
                   5784: #
                   5785: #                        $owner    - The course requestor (who will be the
                   5786: #                                    course owner, in the form username:domain
                   5787: #
1.417     raeburn  5788: #   $client       - Socket open on the client.
                   5789: # Returns:
                   5790: #    1           - Indicating processing should continue.
                   5791: #
                   5792: sub validate_instcode_handler {
                   5793:     my ($cmd, $tail, $client) = @_;
                   5794:     my $userinput = "$cmd:$tail";
1.423     raeburn  5795:     my ($dom,$instcode,$owner) = split(/:/, $tail);
1.422     raeburn  5796:     $instcode = &unescape($instcode);
                   5797:     $owner = &unescape($owner);
1.489.2.3  raeburn  5798:     my ($outcome,$description,$credits) = 
1.426     raeburn  5799:         &localenroll::validate_instcode($dom,$instcode,$owner);
1.489.2.3  raeburn  5800:     my $result = &escape($outcome).'&'.&escape($description).'&'.
                   5801:                  &escape($credits);
1.426     raeburn  5802:     &Reply($client, \$result, $userinput);
1.417     raeburn  5803: 
                   5804:     return 1;
                   5805: }
                   5806: &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
                   5807: 
1.489.2.41  raeburn  5808: #
                   5809: #  Validate co-owner for cross-listed institutional code and
                   5810: #  institutional course code itself used for a LON-CAPA course.
                   5811: #
                   5812: # Formal Parameters:
                   5813: #   $cmd          - The command request that got us dispatched.
                   5814: #   $tail         - The tail of the command.  In this case,
                   5815: #                   this is a colon separated string containing:
                   5816: #      $dom            - Course's LON-CAPA domain
                   5817: #      $instcode       - Institutional course code for the course
                   5818: #      $inst_xlist     - Institutional course Id for the crosslisting
                   5819: #      $coowner        - Username of co-owner
                   5820: #      (values for all but $dom have been escaped).
                   5821: #
                   5822: #   $client       - Socket open on the client.
                   5823: # Returns:
                   5824: #    1           - Indicating processing should continue.
                   5825: #
                   5826: sub validate_instcrosslist_handler  {
                   5827:     my ($cmd, $tail, $client) = @_;
                   5828:     my $userinput = "$cmd:$tail";
                   5829:     my ($dom,$instcode,$inst_xlist,$coowner) = split(/:/,$tail);
                   5830:     $instcode = &unescape($instcode);
                   5831:     $inst_xlist = &unescape($inst_xlist);
                   5832:     $coowner = &unescape($coowner);
                   5833:     my $outcome = &localenroll::validate_crosslist_access($dom,$instcode,
                   5834:                                                           $inst_xlist,$coowner);
                   5835:     &Reply($client, \$outcome, $userinput);
                   5836: 
                   5837:     return 1;
                   5838: }
                   5839: &register_handler("autovalidateinstcrosslist", \&validate_instcrosslist_handler, 0, 1, 0);
                   5840: 
1.248     foxr     5841: #   Get the official sections for which auto-enrollment is possible.
                   5842: #   Since the admin people won't know about 'unofficial sections' 
                   5843: #   we cannot auto-enroll on them.
                   5844: # Formal Parameters:
                   5845: #    $cmd     - The command request that got us dispatched here.
                   5846: #    $tail    - The remainder of the request.  In our case this
                   5847: #               will be split into:
                   5848: #               $coursecode   - The course name from the admin point of view.
                   5849: #               $cdom         - The course's domain(?).
                   5850: #    $client  - Socket open on the client.
                   5851: # Returns:
                   5852: #    1    - Indiciting processing should continue.
                   5853: #
                   5854: sub get_sections_handler {
                   5855:     my ($cmd, $tail, $client) = @_;
                   5856:     my $userinput = "$cmd:$tail";
                   5857: 
                   5858:     my ($coursecode, $cdom) = split(/:/, $tail);
                   5859:     my @secs = &localenroll::get_sections($coursecode,$cdom);
                   5860:     my $seclist = &escape(join(':',@secs));
                   5861: 
1.387     albertel 5862:     &Reply($client, \$seclist, $userinput);
1.248     foxr     5863:     
                   5864: 
                   5865:     return 1;
                   5866: }
                   5867: &register_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
                   5868: 
                   5869: #   Validate the owner of a new course section.  
                   5870: #
                   5871: # Formal Parameters:
                   5872: #   $cmd      - Command that got us dispatched.
                   5873: #   $tail     - the remainder of the command.  For us this consists of a
                   5874: #               colon separated string containing:
                   5875: #                  $inst    - Course Id from the institutions point of view.
                   5876: #                  $owner   - Proposed owner of the course.
                   5877: #                  $cdom    - Domain of the course (from the institutions
                   5878: #                             point of view?)..
                   5879: #   $client   - Socket open on the client.
                   5880: #
                   5881: # Returns:
                   5882: #   1        - Processing should continue.
                   5883: #
                   5884: sub validate_course_owner_handler {
                   5885:     my ($cmd, $tail, $client)  = @_;
                   5886:     my $userinput = "$cmd:$tail";
1.470     raeburn  5887:     my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
                   5888:     
1.336     raeburn  5889:     $owner = &unescape($owner);
1.470     raeburn  5890:     $coowners = &unescape($coowners);
                   5891:     my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
1.387     albertel 5892:     &Reply($client, \$outcome, $userinput);
1.248     foxr     5893: 
                   5894: 
                   5895: 
                   5896:     return 1;
                   5897: }
                   5898: &register_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263     albertel 5899: 
1.248     foxr     5900: #
                   5901: #   Validate a course section in the official schedule of classes
                   5902: #   from the institutions point of view (part of autoenrollment).
                   5903: #
                   5904: # Formal Parameters:
                   5905: #   $cmd          - The command request that got us dispatched.
                   5906: #   $tail         - The tail of the command.  In this case,
                   5907: #                   this is a colon separated set of words that will be split
                   5908: #                   into:
                   5909: #                        $inst_course_id - The course/section id from the
                   5910: #                                          institutions point of view.
                   5911: #                        $cdom           - The domain from the institutions
                   5912: #                                          point of view.
                   5913: #   $client       - Socket open on the client.
                   5914: # Returns:
                   5915: #    1           - Indicating processing should continue.
                   5916: #
                   5917: sub validate_course_section_handler {
                   5918:     my ($cmd, $tail, $client) = @_;
                   5919:     my $userinput = "$cmd:$tail";
                   5920:     my ($inst_course_id, $cdom) = split(/:/, $tail);
                   5921: 
                   5922:     my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
1.387     albertel 5923:     &Reply($client, \$outcome, $userinput);
1.248     foxr     5924: 
                   5925: 
                   5926:     return 1;
                   5927: }
                   5928: &register_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
                   5929: 
                   5930: #
1.340     raeburn  5931: #   Validate course owner's access to enrollment data for specific class section. 
                   5932: #   
                   5933: #
                   5934: # Formal Parameters:
                   5935: #    $cmd     - The command request that got us dispatched.
                   5936: #    $tail    - The tail of the command.   In this case this is a colon separated
1.489.2.29  raeburn  5937: #               set of values that will be split into:
1.340     raeburn  5938: #               $inst_class  - Institutional code for the specific class section   
1.489.2.29  raeburn  5939: #               $ownerlist   - An escaped comma-separated list of username:domain
                   5940: #                              of the course owner, and co-owner(s).
1.340     raeburn  5941: #               $cdom        - The domain of the course from the institution's
                   5942: #                              point of view.
                   5943: #    $client  - The socket open on the client.
                   5944: # Returns:
                   5945: #    1 - continue processing.
                   5946: #
                   5947: 
                   5948: sub validate_class_access_handler {
                   5949:     my ($cmd, $tail, $client) = @_;
                   5950:     my $userinput = "$cmd:$tail";
1.383     raeburn  5951:     my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
1.392     raeburn  5952:     my $owners = &unescape($ownerlist);
1.341     albertel 5953:     my $outcome;
                   5954:     eval {
                   5955: 	local($SIG{__DIE__})='DEFAULT';
1.392     raeburn  5956: 	$outcome=&localenroll::check_section($inst_class,$owners,$cdom);
1.341     albertel 5957:     };
1.387     albertel 5958:     &Reply($client,\$outcome, $userinput);
1.340     raeburn  5959: 
                   5960:     return 1;
                   5961: }
                   5962: &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
                   5963: 
                   5964: #
1.489.2.41  raeburn  5965: #    Modify institutional sections (using customized &instsec_reformat()
                   5966: #    routine in localenroll.pm), to either clutter or declutter, for
                   5967: #    purposes of ensuring an institutional course section (string) can
                   5968: #    be unambiguously separated into institutional course and section.
                   5969: #
                   5970: # Formal Parameters:
                   5971: #    $cmd     - The command request that got us dispatched.
                   5972: #    $tail    - The tail of the command.   In this case this is a colon separated
                   5973: #               set of values that will be split into:
                   5974: #               $cdom        - The LON-CAPA domain of the course.
                   5975: #               $action      - Either: clutter or declutter
                   5976: #                              clutter adds character(s) to eliminate ambiguity
                   5977: #                              declutter removes the added characters (e.g., for
                   5978: #                              display of the institutional course section string.
                   5979: #               $info        - A frozen hash in which keys are:
                   5980: #                              LON-CAPA course number:Institutional course code
                   5981: #                              and values are a reference to an array of the
                   5982: #                              items to modify -- either institutional sections,
                   5983: #                              or institutional course sections (for crosslistings).
                   5984: #    $client  - The socket open on the client.
                   5985: # Returns:
                   5986: #    1 - continue processing.
                   5987: #
                   5988: 
                   5989: sub instsec_reformat_handler {
                   5990:     my ($cmd, $tail, $client) = @_;
                   5991:     my $userinput = "$cmd:$tail";
                   5992:     my ($cdom,$action,$info) = split(/:/,$tail);
                   5993:     my $instsecref = &Apache::lonnet::thaw_unescape($info);
                   5994:     my ($outcome,$result);
                   5995:     eval {
                   5996:         local($SIG{__DIE__})='DEFAULT';
                   5997:         $outcome=&localenroll::instsec_reformat($cdom,$action,$instsecref);
                   5998:         if ($outcome eq 'ok') {
                   5999:             if (ref($instsecref) eq 'HASH') {
                   6000:                 foreach my $key (keys(%{$instsecref})) {
                   6001:                     $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($instsecref->{$key}).'&';
                   6002:                 }
                   6003:                 $result =~ s/\&$//;
                   6004:             }
                   6005:         }
                   6006:     };
                   6007:     if (!$@) {
                   6008:         if ($outcome eq 'ok') {
                   6009:             &Reply( $client, \$result, $userinput);
                   6010:         } else {
                   6011:             &Reply($client,\$outcome, $userinput);
                   6012:         }
                   6013:     } else {
                   6014:         &Failure($client,"unknown_cmd\n",$userinput);
                   6015:     }
                   6016:     return 1;
                   6017: }
                   6018: &register_handler("autoinstsecreformat",\&instsec_reformat_handler, 0, 1, 0);
                   6019: 
                   6020: #
1.489.2.29  raeburn  6021: #   Validate course owner or co-owners(s) access to enrollment data for all sections
                   6022: #   and crosslistings for a particular course.
                   6023: #
                   6024: #
                   6025: # Formal Parameters:
                   6026: #    $cmd     - The command request that got us dispatched.
                   6027: #    $tail    - The tail of the command.   In this case this is a colon separated
                   6028: #               set of values that will be split into:
                   6029: #               $ownerlist   - An escaped comma-separated list of username:domain
                   6030: #                              of the course owner, and co-owner(s).
                   6031: #               $cdom        - The domain of the course from the institution's
                   6032: #                              point of view.
                   6033: #               $classes     - Frozen hash of institutional course sections and
                   6034: #                              crosslistings.
                   6035: #    $client  - The socket open on the client.
                   6036: # Returns:
                   6037: #    1 - continue processing.
                   6038: #
                   6039: 
                   6040: sub validate_classes_handler {
                   6041:     my ($cmd, $tail, $client) = @_;
                   6042:     my $userinput = "$cmd:$tail";
                   6043:     my ($ownerlist,$cdom,$classes) = split(/:/, $tail);
                   6044:     my $classesref = &Apache::lonnet::thaw_unescape($classes);
                   6045:     my $owners = &unescape($ownerlist);
                   6046:     my $result;
                   6047:     eval {
                   6048:         local($SIG{__DIE__})='DEFAULT';
                   6049:         my %validations;
                   6050:         my $response = &localenroll::check_instclasses($owners,$cdom,$classesref,
                   6051:                                                        \%validations);
                   6052:         if ($response eq 'ok') {
                   6053:             foreach my $key (keys(%validations)) {
                   6054:                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
                   6055:             }
                   6056:             $result =~ s/\&$//;
                   6057:         } else {
                   6058:             $result = 'error';
                   6059:         }
                   6060:     };
                   6061:     if (!$@) {
                   6062:         &Reply($client, \$result, $userinput);
                   6063:     } else {
                   6064:         &Failure($client,"unknown_cmd\n",$userinput);
                   6065:     }
                   6066:     return 1;
                   6067: }
                   6068: &register_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0);
                   6069: 
                   6070: #
1.340     raeburn  6071: #   Create a password for a new LON-CAPA user added by auto-enrollment.
                   6072: #   Only used for case where authentication method for new user is localauth
1.248     foxr     6073: #
                   6074: # Formal Parameters:
                   6075: #    $cmd     - The command request that got us dispatched.
                   6076: #    $tail    - The tail of the command.   In this case this is a colon separated
                   6077: #               set of words that will be split into:
1.340     raeburn  6078: #               $authparam - An authentication parameter (localauth parameter).
1.248     foxr     6079: #               $cdom      - The domain of the course from the institution's
                   6080: #                            point of view.
                   6081: #    $client  - The socket open on the client.
                   6082: # Returns:
                   6083: #    1 - continue processing.
                   6084: #
                   6085: sub create_auto_enroll_password_handler {
                   6086:     my ($cmd, $tail, $client) = @_;
                   6087:     my $userinput = "$cmd:$tail";
                   6088: 
                   6089:     my ($authparam, $cdom) = split(/:/, $userinput);
                   6090: 
                   6091:     my ($create_passwd,$authchk);
                   6092:     ($authparam,
                   6093:      $create_passwd,
                   6094:      $authchk) = &localenroll::create_password($authparam,$cdom);
                   6095: 
                   6096:     &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
                   6097: 	   $userinput);
                   6098: 
                   6099: 
                   6100:     return 1;
                   6101: }
                   6102: &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 
                   6103: 		  0, 1, 0);
                   6104: 
1.489.2.22  raeburn  6105: sub auto_export_grades_handler {
                   6106:     my ($cmd, $tail, $client) = @_;
                   6107:     my $userinput = "$cmd:$tail";
                   6108:     my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
                   6109:     my $inforef = &Apache::lonnet::thaw_unescape($info);
                   6110:     my $dataref = &Apache::lonnet::thaw_unescape($data);
                   6111:     my ($outcome,$result);;
                   6112:     eval {
                   6113:         local($SIG{__DIE__})='DEFAULT';
                   6114:         my %rtnhash;
                   6115:         $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
                   6116:         if ($outcome eq 'ok') {
                   6117:             foreach my $key (keys(%rtnhash)) {
                   6118:                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
                   6119:             }
                   6120:             $result =~ s/\&$//;
                   6121:         }
                   6122:     };
                   6123:     if (!$@) {
                   6124:         if ($outcome eq 'ok') {
                   6125:             if ($cipher) {
                   6126:                 my $cmdlength=length($result);
                   6127:                 $result.="         ";
                   6128:                 my $encresult='';
                   6129:                 for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   6130:                     $encresult.= unpack("H16",
                   6131:                                         $cipher->encrypt(substr($result,
                   6132:                                                                 $encidx,
                   6133:                                                                 8)));
                   6134:                 }
                   6135:                 &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
                   6136:             } else {
                   6137:                 &Failure( $client, "error:no_key\n", $userinput);
                   6138:             }
                   6139:         } else {
                   6140:             &Reply($client, "$outcome\n", $userinput);
                   6141:         }
                   6142:     } else {
                   6143:         &Failure($client,"export_error\n",$userinput);
                   6144:     }
                   6145:     return 1;
                   6146: }
                   6147: &register_handler("autoexportgrades", \&auto_export_grades_handler,
1.489.2.35  raeburn  6148:                   1, 1, 0);
1.489.2.22  raeburn  6149: 
                   6150: 
1.248     foxr     6151: #   Retrieve and remove temporary files created by/during autoenrollment.
                   6152: #
                   6153: # Formal Parameters:
                   6154: #    $cmd      - The command that got us dispatched.
                   6155: #    $tail     - The tail of the command.  In our case this is a colon 
                   6156: #                separated list that will be split into:
1.489.2.24  raeburn  6157: #                $filename - The name of the file to retrieve.
1.248     foxr     6158: #                            The filename is given as a path relative to
                   6159: #                            the LonCAPA temp file directory.
                   6160: #    $client   - Socket open on the client.
                   6161: #
                   6162: # Returns:
                   6163: #   1     - Continue processing.
                   6164: sub retrieve_auto_file_handler {
                   6165:     my ($cmd, $tail, $client)    = @_;
                   6166:     my $userinput                = "cmd:$tail";
                   6167: 
                   6168:     my ($filename)   = split(/:/, $tail);
                   6169: 
                   6170:     my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
1.489.2.20  raeburn  6171:     if ($filename =~m{/\.\./}) {
                   6172:         &Failure($client, "refused\n", $userinput);
1.489.2.24  raeburn  6173:     } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
                   6174:         &Failure($client, "refused\n", $userinput);
1.489.2.20  raeburn  6175:     } elsif ( (-e $source) && ($filename ne '') ) {
1.248     foxr     6176: 	my $reply = '';
                   6177: 	if (open(my $fh,$source)) {
                   6178: 	    while (<$fh>) {
                   6179: 		chomp($_);
                   6180: 		$_ =~ s/^\s+//g;
                   6181: 		$_ =~ s/\s+$//g;
                   6182: 		$reply .= $_;
                   6183: 	    }
                   6184: 	    close($fh);
                   6185: 	    &Reply($client, &escape($reply)."\n", $userinput);
                   6186: 
                   6187: #   Does this have to be uncommented??!?  (RF).
                   6188: #
                   6189: #                                unlink($source);
                   6190: 	} else {
                   6191: 	    &Failure($client, "error\n", $userinput);
                   6192: 	}
                   6193:     } else {
                   6194: 	&Failure($client, "error\n", $userinput);
                   6195:     }
                   6196:     
                   6197: 
                   6198:     return 1;
                   6199: }
                   6200: &register_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
                   6201: 
1.423     raeburn  6202: sub crsreq_checks_handler {
                   6203:     my ($cmd, $tail, $client) = @_;
                   6204:     my $userinput = "$cmd:$tail";
                   6205:     my $dom = $tail;
                   6206:     my $result;
1.489.2.12  raeburn  6207:     my @reqtypes = ('official','unofficial','community','textbook');
1.423     raeburn  6208:     eval {
                   6209:         local($SIG{__DIE__})='DEFAULT';
                   6210:         my %validations;
1.424     raeburn  6211:         my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
                   6212:                                                    \%validations);
1.423     raeburn  6213:         if ($response eq 'ok') { 
                   6214:             foreach my $key (keys(%validations)) {
                   6215:                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
                   6216:             }
                   6217:             $result =~ s/\&$//;
                   6218:         } else {
                   6219:             $result = 'error';
                   6220:         }
                   6221:     };
                   6222:     if (!$@) {
                   6223:         &Reply($client, \$result, $userinput);
                   6224:     } else {
                   6225:         &Failure($client,"unknown_cmd\n",$userinput);
                   6226:     }
                   6227:     return 1;
                   6228: }
                   6229: &register_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
                   6230: 
                   6231: sub validate_crsreq_handler {
                   6232:     my ($cmd, $tail, $client) = @_;
                   6233:     my $userinput = "$cmd:$tail";
1.489.2.13  raeburn  6234:     my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
1.423     raeburn  6235:     $instcode = &unescape($instcode);
                   6236:     $owner = &unescape($owner);
                   6237:     $crstype = &unescape($crstype);
                   6238:     $inststatuslist = &unescape($inststatuslist);
                   6239:     $instcode = &unescape($instcode);
                   6240:     $instseclist = &unescape($instseclist);
1.489.2.13  raeburn  6241:     my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
1.423     raeburn  6242:     my $outcome;
                   6243:     eval {
                   6244:         local($SIG{__DIE__})='DEFAULT';
                   6245:         $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
                   6246:                                                  $inststatuslist,$instcode,
1.489.2.13  raeburn  6247:                                                  $instseclist,$custominfo);
1.423     raeburn  6248:     };
                   6249:     if (!$@) {
                   6250:         &Reply($client, \$outcome, $userinput);
                   6251:     } else {
                   6252:         &Failure($client,"unknown_cmd\n",$userinput);
                   6253:     }
                   6254:     return 1;
                   6255: }
                   6256: &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
                   6257: 
1.489.2.11  raeburn  6258: sub crsreq_update_handler {
                   6259:     my ($cmd, $tail, $client) = @_;
                   6260:     my $userinput = "$cmd:$tail";
1.489.2.14  raeburn  6261:     my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
                   6262:         $accessstart,$accessend,$infohashref) =
1.489.2.11  raeburn  6263:         split(/:/, $tail);
                   6264:     $crstype = &unescape($crstype);
                   6265:     $action = &unescape($action);
                   6266:     $ownername = &unescape($ownername);
                   6267:     $ownerdomain = &unescape($ownerdomain);
                   6268:     $fullname = &unescape($fullname);
                   6269:     $title = &unescape($title);
                   6270:     $code = &unescape($code);
1.489.2.14  raeburn  6271:     $accessstart = &unescape($accessstart);
                   6272:     $accessend = &unescape($accessend);
1.489.2.11  raeburn  6273:     my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
                   6274:     my ($result,$outcome);
                   6275:     eval {
                   6276:         local($SIG{__DIE__})='DEFAULT';
                   6277:         my %rtnhash;
                   6278:         $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
                   6279:                                                 $ownername,$ownerdomain,$fullname,
1.489.2.14  raeburn  6280:                                                 $title,$code,$accessstart,$accessend,
                   6281:                                                 $incoming,\%rtnhash);
1.489.2.11  raeburn  6282:         if ($outcome eq 'ok') {
1.489.2.18  raeburn  6283:             my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
1.489.2.11  raeburn  6284:             foreach my $key (keys(%rtnhash)) {
                   6285:                 if (grep(/^\Q$key\E/,@posskeys)) {
                   6286:                     $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
                   6287:                 }
                   6288:             }
                   6289:             $result =~ s/\&$//;
                   6290:         }
                   6291:     };
                   6292:     if (!$@) {
                   6293:         if ($outcome eq 'ok') {
                   6294:             &Reply($client, \$result, $userinput);
                   6295:         } else {
                   6296:             &Reply($client, "format_error\n", $userinput);
                   6297:         }
                   6298:     } else {
                   6299:         &Failure($client,"unknown_cmd\n",$userinput);
                   6300:     }
                   6301:     return 1;
                   6302: }
                   6303: &register_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
                   6304: 
1.248     foxr     6305: #
                   6306: #   Read and retrieve institutional code format (for support form).
                   6307: # Formal Parameters:
                   6308: #    $cmd        - Command that dispatched us.
                   6309: #    $tail       - Tail of the command.  In this case it conatins 
                   6310: #                  the course domain and the coursename.
                   6311: #    $client     - Socket open on the client.
                   6312: # Returns:
                   6313: #    1     - Continue processing.
                   6314: #
                   6315: sub get_institutional_code_format_handler {
                   6316:     my ($cmd, $tail, $client)   = @_;
                   6317:     my $userinput               = "$cmd:$tail";
                   6318: 
                   6319:     my $reply;
                   6320:     my($cdom,$course) = split(/:/,$tail);
                   6321:     my @pairs = split/\&/,$course;
                   6322:     my %instcodes = ();
                   6323:     my %codes = ();
                   6324:     my @codetitles = ();
                   6325:     my %cat_titles = ();
                   6326:     my %cat_order = ();
                   6327:     foreach (@pairs) {
                   6328: 	my ($key,$value) = split/=/,$_;
                   6329: 	$instcodes{&unescape($key)} = &unescape($value);
                   6330:     }
                   6331:     my $formatreply = &localenroll::instcode_format($cdom,
                   6332: 						    \%instcodes,
                   6333: 						    \%codes,
                   6334: 						    \@codetitles,
                   6335: 						    \%cat_titles,
                   6336: 						    \%cat_order);
                   6337:     if ($formatreply eq 'ok') {
1.365     albertel 6338: 	my $codes_str = &Apache::lonnet::hash2str(%codes);
                   6339: 	my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
                   6340: 	my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
                   6341: 	my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
1.248     foxr     6342: 	&Reply($client,
                   6343: 	       $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
                   6344: 	       .$cat_order_str."\n",
                   6345: 	       $userinput);
                   6346:     } else {
                   6347: 	# this else branch added by RF since if not ok, lonc will
                   6348: 	# hang waiting on reply until timeout.
                   6349: 	#
                   6350: 	&Reply($client, "format_error\n", $userinput);
                   6351:     }
                   6352:     
                   6353:     return 1;
                   6354: }
1.265     albertel 6355: &register_handler("autoinstcodeformat",
                   6356: 		  \&get_institutional_code_format_handler,0,1,0);
1.246     foxr     6357: 
1.345     raeburn  6358: sub get_institutional_defaults_handler {
                   6359:     my ($cmd, $tail, $client)   = @_;
                   6360:     my $userinput               = "$cmd:$tail";
                   6361: 
                   6362:     my $dom = $tail;
                   6363:     my %defaults_hash;
                   6364:     my @code_order;
                   6365:     my $outcome;
                   6366:     eval {
                   6367:         local($SIG{__DIE__})='DEFAULT';
                   6368:         $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
                   6369:                                                    \@code_order);
                   6370:     };
                   6371:     if (!$@) {
                   6372:         if ($outcome eq 'ok') {
                   6373:             my $result='';
                   6374:             while (my ($key,$value) = each(%defaults_hash)) {
                   6375:                 $result.=&escape($key).'='.&escape($value).'&';
                   6376:             }
                   6377:             $result .= 'code_order='.&escape(join('&',@code_order));
1.387     albertel 6378:             &Reply($client,\$result,$userinput);
1.345     raeburn  6379:         } else {
                   6380:             &Reply($client,"error\n", $userinput);
                   6381:         }
                   6382:     } else {
                   6383:         &Failure($client,"unknown_cmd\n",$userinput);
                   6384:     }
                   6385: }
                   6386: &register_handler("autoinstcodedefaults",
                   6387:                   \&get_institutional_defaults_handler,0,1,0);
                   6388: 
1.416     raeburn  6389: sub get_possible_instcodes_handler {
                   6390:     my ($cmd, $tail, $client)   = @_;
                   6391:     my $userinput               = "$cmd:$tail";
                   6392: 
                   6393:     my $reply;
                   6394:     my $cdom = $tail;
1.417     raeburn  6395:     my (@codetitles,%cat_titles,%cat_order,@code_order);
1.416     raeburn  6396:     my $formatreply = &localenroll::possible_instcodes($cdom,
                   6397:                                                        \@codetitles,
                   6398:                                                        \%cat_titles,
1.417     raeburn  6399:                                                        \%cat_order,
                   6400:                                                        \@code_order);
1.416     raeburn  6401:     if ($formatreply eq 'ok') {
                   6402:         my $result = join('&',map {&escape($_);} (@codetitles)).':';
1.417     raeburn  6403:         $result .= join('&',map {&escape($_);} (@code_order)).':';
1.416     raeburn  6404:         foreach my $key (keys(%cat_titles)) {
                   6405:             $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
                   6406:         }
                   6407:         $result =~ s/\&$//;
                   6408:         $result .= ':';
                   6409:         foreach my $key (keys(%cat_order)) {
                   6410:             $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
                   6411:         }
                   6412:         $result =~ s/\&$//;
                   6413:         &Reply($client,\$result,$userinput);
                   6414:     } else {
                   6415:         &Reply($client, "format_error\n", $userinput);
                   6416:     }
                   6417:     return 1;
                   6418: }
                   6419: &register_handler("autopossibleinstcodes",
                   6420:                   \&get_possible_instcodes_handler,0,1,0);
                   6421: 
1.381     raeburn  6422: sub get_institutional_user_rules {
                   6423:     my ($cmd, $tail, $client)   = @_;
                   6424:     my $userinput               = "$cmd:$tail";
                   6425:     my $dom = &unescape($tail);
                   6426:     my (%rules_hash,@rules_order);
                   6427:     my $outcome;
                   6428:     eval {
                   6429:         local($SIG{__DIE__})='DEFAULT';
                   6430:         $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
                   6431:     };
                   6432:     if (!$@) {
                   6433:         if ($outcome eq 'ok') {
                   6434:             my $result;
                   6435:             foreach my $key (keys(%rules_hash)) {
                   6436:                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
                   6437:             }
                   6438:             $result =~ s/\&$//;
                   6439:             $result .= ':';
                   6440:             if (@rules_order > 0) {
                   6441:                 foreach my $item (@rules_order) {
                   6442:                     $result .= &escape($item).'&';
                   6443:                 }
                   6444:             }
                   6445:             $result =~ s/\&$//;
1.387     albertel 6446:             &Reply($client,\$result,$userinput);
1.381     raeburn  6447:         } else {
                   6448:             &Reply($client,"error\n", $userinput);
                   6449:         }
                   6450:     } else {
                   6451:         &Failure($client,"unknown_cmd\n",$userinput);
                   6452:     }
                   6453: }
                   6454: &register_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
                   6455: 
1.389     raeburn  6456: sub get_institutional_id_rules {
                   6457:     my ($cmd, $tail, $client)   = @_;
                   6458:     my $userinput               = "$cmd:$tail";
                   6459:     my $dom = &unescape($tail);
                   6460:     my (%rules_hash,@rules_order);
                   6461:     my $outcome;
                   6462:     eval {
                   6463:         local($SIG{__DIE__})='DEFAULT';
                   6464:         $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
                   6465:     };
                   6466:     if (!$@) {
                   6467:         if ($outcome eq 'ok') {
                   6468:             my $result;
                   6469:             foreach my $key (keys(%rules_hash)) {
                   6470:                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
                   6471:             }
                   6472:             $result =~ s/\&$//;
                   6473:             $result .= ':';
                   6474:             if (@rules_order > 0) {
                   6475:                 foreach my $item (@rules_order) {
                   6476:                     $result .= &escape($item).'&';
                   6477:                 }
                   6478:             }
                   6479:             $result =~ s/\&$//;
                   6480:             &Reply($client,\$result,$userinput);
                   6481:         } else {
                   6482:             &Reply($client,"error\n", $userinput);
                   6483:         }
                   6484:     } else {
                   6485:         &Failure($client,"unknown_cmd\n",$userinput);
                   6486:     }
                   6487: }
                   6488: &register_handler("instidrules",\&get_institutional_id_rules,0,1,0);
                   6489: 
1.397     raeburn  6490: sub get_institutional_selfcreate_rules {
1.396     raeburn  6491:     my ($cmd, $tail, $client)   = @_;
                   6492:     my $userinput               = "$cmd:$tail";
                   6493:     my $dom = &unescape($tail);
                   6494:     my (%rules_hash,@rules_order);
                   6495:     my $outcome;
                   6496:     eval {
                   6497:         local($SIG{__DIE__})='DEFAULT';
1.397     raeburn  6498:         $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
1.396     raeburn  6499:     };
                   6500:     if (!$@) {
                   6501:         if ($outcome eq 'ok') {
                   6502:             my $result;
                   6503:             foreach my $key (keys(%rules_hash)) {
                   6504:                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
                   6505:             }
                   6506:             $result =~ s/\&$//;
                   6507:             $result .= ':';
                   6508:             if (@rules_order > 0) {
                   6509:                 foreach my $item (@rules_order) {
                   6510:                     $result .= &escape($item).'&';
                   6511:                 }
                   6512:             }
                   6513:             $result =~ s/\&$//;
                   6514:             &Reply($client,\$result,$userinput);
                   6515:         } else {
                   6516:             &Reply($client,"error\n", $userinput);
                   6517:         }
                   6518:     } else {
                   6519:         &Failure($client,"unknown_cmd\n",$userinput);
                   6520:     }
                   6521: }
1.397     raeburn  6522: &register_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
1.396     raeburn  6523: 
1.489.2.43.2.  (raeburn 6524:): sub get_unamemap_rules {
                   6525:):     my ($cmd, $tail, $client)   = @_;
                   6526:):     my $userinput               = "$cmd:$tail";
                   6527:):     my $dom = &unescape($tail);
                   6528:):     my (%rules_hash,@rules_order);
                   6529:):     my $outcome;
                   6530:):     eval {
                   6531:):         local($SIG{__DIE__})='DEFAULT';
                   6532:):         $outcome = &localenroll::unamemap_rules($dom,\%rules_hash,\@rules_order);
                   6533:):     };
                   6534:):     if (!$@) {
                   6535:):         if ($outcome eq 'ok') {
                   6536:):             my $result;
                   6537:):             foreach my $key (keys(%rules_hash)) {
                   6538:):                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
                   6539:):             }
                   6540:):             $result =~ s/\&$//;
                   6541:):             $result .= ':';
                   6542:):             if (@rules_order > 0) {
                   6543:):                 foreach my $item (@rules_order) {
                   6544:):                     $result .= &escape($item).'&';
                   6545:):                 }
                   6546:):             }
                   6547:):             $result =~ s/\&$//;
                   6548:):             &Reply($client,\$result,$userinput);
                   6549:):         } else {
                   6550:):             &Reply($client,"error\n", $userinput);
                   6551:):         }
                   6552:):     } else {
                   6553:):         &Failure($client,"unknown_cmd\n",$userinput);
                   6554:):     }
                   6555:): }
                   6556:): &register_handler("unamemaprules",\&get_unamemap_rules,0,1,0);
1.381     raeburn  6557: 
                   6558: sub institutional_username_check {
                   6559:     my ($cmd, $tail, $client)   = @_;
                   6560:     my $userinput               = "$cmd:$tail";
                   6561:     my %rulecheck;
                   6562:     my $outcome;
                   6563:     my ($udom,$uname,@rules) = split(/:/,$tail);
                   6564:     $udom = &unescape($udom);
                   6565:     $uname = &unescape($uname);
                   6566:     @rules = map {&unescape($_);} (@rules);
                   6567:     eval {
                   6568:         local($SIG{__DIE__})='DEFAULT';
                   6569:         $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
                   6570:     };
                   6571:     if (!$@) {
                   6572:         if ($outcome eq 'ok') {
                   6573:             my $result='';
                   6574:             foreach my $key (keys(%rulecheck)) {
                   6575:                 $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
                   6576:             }
1.387     albertel 6577:             &Reply($client,\$result,$userinput);
1.381     raeburn  6578:         } else {
                   6579:             &Reply($client,"error\n", $userinput);
                   6580:         }
                   6581:     } else {
                   6582:         &Failure($client,"unknown_cmd\n",$userinput);
                   6583:     }
                   6584: }
                   6585: &register_handler("instrulecheck",\&institutional_username_check,0,1,0);
                   6586: 
1.389     raeburn  6587: sub institutional_id_check {
                   6588:     my ($cmd, $tail, $client)   = @_;
                   6589:     my $userinput               = "$cmd:$tail";
                   6590:     my %rulecheck;
                   6591:     my $outcome;
                   6592:     my ($udom,$id,@rules) = split(/:/,$tail);
                   6593:     $udom = &unescape($udom);
                   6594:     $id = &unescape($id);
                   6595:     @rules = map {&unescape($_);} (@rules);
                   6596:     eval {
                   6597:         local($SIG{__DIE__})='DEFAULT';
                   6598:         $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
                   6599:     };
                   6600:     if (!$@) {
                   6601:         if ($outcome eq 'ok') {
                   6602:             my $result='';
                   6603:             foreach my $key (keys(%rulecheck)) {
                   6604:                 $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
                   6605:             }
                   6606:             &Reply($client,\$result,$userinput);
                   6607:         } else {
                   6608:             &Reply($client,"error\n", $userinput);
                   6609:         }
                   6610:     } else {
                   6611:         &Failure($client,"unknown_cmd\n",$userinput);
                   6612:     }
                   6613: }
                   6614: &register_handler("instidrulecheck",\&institutional_id_check,0,1,0);
1.345     raeburn  6615: 
1.397     raeburn  6616: sub institutional_selfcreate_check {
1.396     raeburn  6617:     my ($cmd, $tail, $client)   = @_;
                   6618:     my $userinput               = "$cmd:$tail";
                   6619:     my %rulecheck;
                   6620:     my $outcome;
                   6621:     my ($udom,$email,@rules) = split(/:/,$tail);
                   6622:     $udom = &unescape($udom);
                   6623:     $email = &unescape($email);
                   6624:     @rules = map {&unescape($_);} (@rules);
                   6625:     eval {
                   6626:         local($SIG{__DIE__})='DEFAULT';
1.397     raeburn  6627:         $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
1.396     raeburn  6628:     };
                   6629:     if (!$@) {
                   6630:         if ($outcome eq 'ok') {
                   6631:             my $result='';
                   6632:             foreach my $key (keys(%rulecheck)) {
                   6633:                 $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
                   6634:             }
                   6635:             &Reply($client,\$result,$userinput);
                   6636:         } else {
                   6637:             &Reply($client,"error\n", $userinput);
                   6638:         }
                   6639:     } else {
                   6640:         &Failure($client,"unknown_cmd\n",$userinput);
                   6641:     }
                   6642: }
1.397     raeburn  6643: &register_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
1.396     raeburn  6644: 
1.317     raeburn  6645: # Get domain specific conditions for import of student photographs to a course
                   6646: #
                   6647: # Retrieves information from photo_permission subroutine in localenroll.
                   6648: # Returns outcome (ok) if no processing errors, and whether course owner is 
                   6649: # required to accept conditions of use (yes/no).
                   6650: #
                   6651: #    
                   6652: sub photo_permission_handler {
                   6653:     my ($cmd, $tail, $client)   = @_;
                   6654:     my $userinput               = "$cmd:$tail";
                   6655:     my $cdom = $tail;
                   6656:     my ($perm_reqd,$conditions);
1.320     albertel 6657:     my $outcome;
                   6658:     eval {
                   6659: 	local($SIG{__DIE__})='DEFAULT';
                   6660: 	$outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
                   6661: 						  \$conditions);
                   6662:     };
                   6663:     if (!$@) {
                   6664: 	&Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
                   6665: 	       $userinput);
                   6666:     } else {
                   6667: 	&Failure($client,"unknown_cmd\n",$userinput);
                   6668:     }
                   6669:     return 1;
1.317     raeburn  6670: }
                   6671: &register_handler("autophotopermission",\&photo_permission_handler,0,1,0);
                   6672: 
                   6673: #
                   6674: # Checks if student photo is available for a user in the domain, in the user's
                   6675: # directory (in /userfiles/internal/studentphoto.jpg).
                   6676: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
                   6677: # the student's photo.   
                   6678: 
                   6679: sub photo_check_handler {
                   6680:     my ($cmd, $tail, $client)   = @_;
                   6681:     my $userinput               = "$cmd:$tail";
                   6682:     my ($udom,$uname,$pid) = split(/:/,$tail);
                   6683:     $udom = &unescape($udom);
                   6684:     $uname = &unescape($uname);
                   6685:     $pid = &unescape($pid);
                   6686:     my $path=&propath($udom,$uname).'/userfiles/internal/';
                   6687:     if (!-e $path) {
                   6688:         &mkpath($path);
                   6689:     }
                   6690:     my $response;
                   6691:     my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
                   6692:     $result .= ':'.$response;
                   6693:     &Reply($client, &escape($result)."\n",$userinput);
1.320     albertel 6694:     return 1;
1.317     raeburn  6695: }
                   6696: &register_handler("autophotocheck",\&photo_check_handler,0,1,0);
                   6697: 
                   6698: #
                   6699: # Retrieve information from localenroll about whether to provide a button     
                   6700: # for users who have enbled import of student photos to initiate an 
                   6701: # update of photo files for registered students. Also include 
                   6702: # comment to display alongside button.  
                   6703: 
                   6704: sub photo_choice_handler {
                   6705:     my ($cmd, $tail, $client) = @_;
                   6706:     my $userinput             = "$cmd:$tail";
                   6707:     my $cdom                  = &unescape($tail);
1.320     albertel 6708:     my ($update,$comment);
                   6709:     eval {
                   6710: 	local($SIG{__DIE__})='DEFAULT';
                   6711: 	($update,$comment)    = &localenroll::manager_photo_update($cdom);
                   6712:     };
                   6713:     if (!$@) {
                   6714: 	&Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
                   6715:     } else {
                   6716: 	&Failure($client,"unknown_cmd\n",$userinput);
                   6717:     }
                   6718:     return 1;
1.317     raeburn  6719: }
                   6720: &register_handler("autophotochoice",\&photo_choice_handler,0,1,0);
                   6721: 
1.265     albertel 6722: #
                   6723: # Gets a student's photo to exist (in the correct image type) in the user's 
                   6724: # directory.
                   6725: # Formal Parameters:
                   6726: #    $cmd     - The command request that got us dispatched.
                   6727: #    $tail    - A colon separated set of words that will be split into:
                   6728: #               $domain - student's domain
                   6729: #               $uname  - student username
                   6730: #               $type   - image type desired
                   6731: #    $client  - The socket open on the client.
                   6732: # Returns:
                   6733: #    1 - continue processing.
1.317     raeburn  6734: 
1.265     albertel 6735: sub student_photo_handler {
                   6736:     my ($cmd, $tail, $client) = @_;
1.317     raeburn  6737:     my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265     albertel 6738: 
1.317     raeburn  6739:     my $path=&propath($domain,$uname). '/userfiles/internal/';
                   6740:     my $filename = 'studentphoto.'.$ext;
                   6741:     if ($type eq 'thumbnail') {
                   6742:         $filename = 'studentphoto_tn.'.$ext;
                   6743:     }
                   6744:     if (-e $path.$filename) {
1.265     albertel 6745: 	&Reply($client,"ok\n","$cmd:$tail");
                   6746: 	return 1;
                   6747:     }
                   6748:     &mkpath($path);
1.317     raeburn  6749:     my $file;
                   6750:     if ($type eq 'thumbnail') {
1.320     albertel 6751: 	eval {
                   6752: 	    local($SIG{__DIE__})='DEFAULT';
                   6753: 	    $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
                   6754: 	};
1.317     raeburn  6755:     } else {
                   6756:         $file=&localstudentphoto::fetch($domain,$uname);
                   6757:     }
1.265     albertel 6758:     if (!$file) {
                   6759: 	&Failure($client,"unavailable\n","$cmd:$tail");
                   6760: 	return 1;
                   6761:     }
1.317     raeburn  6762:     if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
                   6763:     if (-e $path.$filename) {
1.265     albertel 6764: 	&Reply($client,"ok\n","$cmd:$tail");
                   6765: 	return 1;
                   6766:     }
                   6767:     &Failure($client,"unable_to_convert\n","$cmd:$tail");
                   6768:     return 1;
                   6769: }
                   6770: &register_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246     foxr     6771: 
1.361     raeburn  6772: sub inst_usertypes_handler {
                   6773:     my ($cmd, $domain, $client) = @_;
                   6774:     my $res;
                   6775:     my $userinput = $cmd.":".$domain; # For logging purposes.
1.370     albertel 6776:     my (%typeshash,@order,$result);
                   6777:     eval {
                   6778: 	local($SIG{__DIE__})='DEFAULT';
                   6779: 	$result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
                   6780:     };
                   6781:     if ($result eq 'ok') {
1.361     raeburn  6782:         if (keys(%typeshash) > 0) {
                   6783:             foreach my $key (keys(%typeshash)) {
                   6784:                 $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
                   6785:             }
                   6786:         }
                   6787:         $res=~s/\&$//;
                   6788:         $res .= ':';
                   6789:         if (@order > 0) {
                   6790:             foreach my $item (@order) {
                   6791:                 $res .= &escape($item).'&';
                   6792:             }
                   6793:         }
                   6794:         $res=~s/\&$//;
                   6795:     }
1.387     albertel 6796:     &Reply($client, \$res, $userinput);
1.361     raeburn  6797:     return 1;
                   6798: }
                   6799: &register_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
                   6800: 
1.264     albertel 6801: # mkpath makes all directories for a file, expects an absolute path with a
                   6802: # file or a trailing / if just a dir is passed
                   6803: # returns 1 on success 0 on failure
                   6804: sub mkpath {
                   6805:     my ($file)=@_;
                   6806:     my @parts=split(/\//,$file,-1);
                   6807:     my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
                   6808:     for (my $i=3;$i<= ($#parts-1);$i++) {
1.265     albertel 6809: 	$now.='/'.$parts[$i]; 
1.264     albertel 6810: 	if (!-e $now) {
                   6811: 	    if  (!mkdir($now,0770)) { return 0; }
                   6812: 	}
                   6813:     }
                   6814:     return 1;
                   6815: }
                   6816: 
1.207     foxr     6817: #---------------------------------------------------------------
                   6818: #
                   6819: #   Getting, decoding and dispatching requests:
                   6820: #
                   6821: #
                   6822: #   Get a Request:
                   6823: #   Gets a Request message from the client.  The transaction
                   6824: #   is defined as a 'line' of text.  We remove the new line
                   6825: #   from the text line.  
1.226     foxr     6826: #
1.211     albertel 6827: sub get_request {
1.207     foxr     6828:     my $input = <$client>;
                   6829:     chomp($input);
1.226     foxr     6830: 
1.234     foxr     6831:     &Debug("get_request: Request = $input\n");
1.207     foxr     6832: 
                   6833:     &status('Processing '.$clientname.':'.$input);
                   6834: 
                   6835:     return $input;
                   6836: }
1.212     foxr     6837: #---------------------------------------------------------------
                   6838: #
                   6839: #  Process a request.  This sub should shrink as each action
                   6840: #  gets farmed out into a separat sub that is registered 
                   6841: #  with the dispatch hash.  
                   6842: #
                   6843: # Parameters:
                   6844: #    user_input   - The request received from the client (lonc).
                   6845: # Returns:
                   6846: #    true to keep processing, false if caller should exit.
                   6847: #
                   6848: sub process_request {
                   6849:     my ($userinput) = @_;      # Easier for now to break style than to
                   6850:                                 # fix all the userinput -> user_input.
                   6851:     my $wasenc    = 0;		# True if request was encrypted.
                   6852: # ------------------------------------------------------------ See if encrypted
1.322     albertel 6853:     # for command
                   6854:     # sethost:<server>
                   6855:     # <command>:<args>
                   6856:     #   we just send it to the processor
                   6857:     # for
                   6858:     # sethost:<server>:<command>:<args>
                   6859:     #  we do the implict set host and then do the command
                   6860:     if ($userinput =~ /^sethost:/) {
                   6861: 	(my $cmd,my $newid,$userinput) = split(':',$userinput,3);
                   6862: 	if (defined($userinput)) {
                   6863: 	    &sethost("$cmd:$newid");
                   6864: 	} else {
                   6865: 	    $userinput = "$cmd:$newid";
                   6866: 	}
                   6867:     }
                   6868: 
1.212     foxr     6869:     if ($userinput =~ /^enc/) {
                   6870: 	$userinput = decipher($userinput);
                   6871: 	$wasenc=1;
                   6872: 	if(!$userinput) {	# Cipher not defined.
1.251     foxr     6873: 	    &Failure($client, "error: Encrypted data without negotated key\n");
1.212     foxr     6874: 	    return 0;
                   6875: 	}
                   6876:     }
                   6877:     Debug("process_request: $userinput\n");
                   6878:     
1.213     foxr     6879:     #  
                   6880:     #   The 'correct way' to add a command to lond is now to
                   6881:     #   write a sub to execute it and Add it to the command dispatch
                   6882:     #   hash via a call to register_handler..  The comments to that
                   6883:     #   sub should give you enough to go on to show how to do this
                   6884:     #   along with the examples that are building up as this code
                   6885:     #   is getting refactored.   Until all branches of the
                   6886:     #   if/elseif monster below have been factored out into
                   6887:     #   separate procesor subs, if the dispatch hash is missing
                   6888:     #   the command keyword, we will fall through to the remainder
                   6889:     #   of the if/else chain below in order to keep this thing in 
                   6890:     #   working order throughout the transmogrification.
                   6891: 
                   6892:     my ($command, $tail) = split(/:/, $userinput, 2);
                   6893:     chomp($command);
                   6894:     chomp($tail);
                   6895:     $tail =~ s/(\r)//;		# This helps people debugging with e.g. telnet.
1.214     foxr     6896:     $command =~ s/(\r)//;	# And this too for parameterless commands.
                   6897:     if(!$tail) {
                   6898: 	$tail ="";		# defined but blank.
                   6899:     }
1.213     foxr     6900: 
                   6901:     &Debug("Command received: $command, encoded = $wasenc");
                   6902: 
                   6903:     if(defined $Dispatcher{$command}) {
                   6904: 
                   6905: 	my $dispatch_info = $Dispatcher{$command};
                   6906: 	my $handler       = $$dispatch_info[0];
                   6907: 	my $need_encode   = $$dispatch_info[1];
                   6908: 	my $client_types  = $$dispatch_info[2];
                   6909: 	Debug("Matched dispatch hash: mustencode: $need_encode "
                   6910: 	      ."ClientType $client_types");
                   6911:       
                   6912: 	#  Validate the request:
                   6913:       
                   6914: 	my $ok = 1;
                   6915: 	my $requesterprivs = 0;
                   6916: 	if(&isClient()) {
                   6917: 	    $requesterprivs |= $CLIENT_OK;
                   6918: 	}
                   6919: 	if(&isManager()) {
                   6920: 	    $requesterprivs |= $MANAGER_OK;
                   6921: 	}
                   6922: 	if($need_encode && (!$wasenc)) {
                   6923: 	    Debug("Must encode but wasn't: $need_encode $wasenc");
                   6924: 	    $ok = 0;
                   6925: 	}
                   6926: 	if(($client_types & $requesterprivs) == 0) {
                   6927: 	    Debug("Client not privileged to do this operation");
                   6928: 	    $ok = 0;
                   6929: 	}
                   6930: 
                   6931: 	if($ok) {
                   6932: 	    Debug("Dispatching to handler $command $tail");
                   6933: 	    my $keep_going = &$handler($command, $tail, $client);
                   6934: 	    return $keep_going;
                   6935: 	} else {
                   6936: 	    Debug("Refusing to dispatch because client did not match requirements");
                   6937: 	    Failure($client, "refused\n", $userinput);
                   6938: 	    return 1;
                   6939: 	}
                   6940: 
                   6941:     }    
                   6942: 
1.262     foxr     6943:     print $client "unknown_cmd\n";
1.212     foxr     6944: # -------------------------------------------------------------------- complete
                   6945:     Debug("process_request - returning 1");
                   6946:     return 1;
                   6947: }
1.207     foxr     6948: #
                   6949: #   Decipher encoded traffic
                   6950: #  Parameters:
                   6951: #     input      - Encoded data.
                   6952: #  Returns:
                   6953: #     Decoded data or undef if encryption key was not yet negotiated.
                   6954: #  Implicit input:
                   6955: #     cipher  - This global holds the negotiated encryption key.
                   6956: #
1.211     albertel 6957: sub decipher {
1.207     foxr     6958:     my ($input)  = @_;
                   6959:     my $output = '';
1.212     foxr     6960:     
                   6961:     
1.207     foxr     6962:     if($cipher) {
                   6963: 	my($enc, $enclength, $encinput) = split(/:/, $input);
                   6964: 	for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
                   6965: 	    $output .= 
                   6966: 		$cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
                   6967: 	}
                   6968: 	return substr($output, 0, $enclength);
                   6969:     } else {
                   6970: 	return undef;
                   6971:     }
                   6972: }
                   6973: 
                   6974: #
                   6975: #   Register a command processor.  This function is invoked to register a sub
                   6976: #   to process a request.  Once registered, the ProcessRequest sub can automatically
                   6977: #   dispatch requests to an appropriate sub, and do the top level validity checking
                   6978: #   as well:
                   6979: #    - Is the keyword recognized.
                   6980: #    - Is the proper client type attempting the request.
                   6981: #    - Is the request encrypted if it has to be.
                   6982: #   Parameters:
                   6983: #    $request_name         - Name of the request being registered.
                   6984: #                           This is the command request that will match
                   6985: #                           against the hash keywords to lookup the information
                   6986: #                           associated with the dispatch information.
                   6987: #    $procedure           - Reference to a sub to call to process the request.
                   6988: #                           All subs get called as follows:
                   6989: #                             Procedure($cmd, $tail, $replyfd, $key)
                   6990: #                             $cmd    - the actual keyword that invoked us.
                   6991: #                             $tail   - the tail of the request that invoked us.
                   6992: #                             $replyfd- File descriptor connected to the client
                   6993: #    $must_encode          - True if the request must be encoded to be good.
                   6994: #    $client_ok            - True if it's ok for a client to request this.
                   6995: #    $manager_ok           - True if it's ok for a manager to request this.
                   6996: # Side effects:
                   6997: #      - On success, the Dispatcher hash has an entry added for the key $RequestName
                   6998: #      - On failure, the program will die as it's a bad internal bug to try to 
                   6999: #        register a duplicate command handler.
                   7000: #
1.211     albertel 7001: sub register_handler {
1.212     foxr     7002:     my ($request_name,$procedure,$must_encode,	$client_ok,$manager_ok)   = @_;
1.207     foxr     7003: 
                   7004:     #  Don't allow duplication#
                   7005:    
                   7006:     if (defined $Dispatcher{$request_name}) {
                   7007: 	die "Attempting to define a duplicate request handler for $request_name\n";
                   7008:     }
                   7009:     #   Build the client type mask:
                   7010:     
                   7011:     my $client_type_mask = 0;
                   7012:     if($client_ok) {
                   7013: 	$client_type_mask  |= $CLIENT_OK;
                   7014:     }
                   7015:     if($manager_ok) {
                   7016: 	$client_type_mask  |= $MANAGER_OK;
                   7017:     }
                   7018:    
                   7019:     #  Enter the hash:
                   7020:       
                   7021:     my @entry = ($procedure, $must_encode, $client_type_mask);
                   7022:    
                   7023:     $Dispatcher{$request_name} = \@entry;
                   7024:    
                   7025: }
                   7026: 
                   7027: 
                   7028: #------------------------------------------------------------------
                   7029: 
                   7030: 
                   7031: 
                   7032: 
1.141     foxr     7033: #
1.96      foxr     7034: #  Convert an error return code from lcpasswd to a string value.
                   7035: #
                   7036: sub lcpasswdstrerror {
                   7037:     my $ErrorCode = shift;
1.97      foxr     7038:     if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96      foxr     7039: 	return "lcpasswd Unrecognized error return value ".$ErrorCode;
                   7040:     } else {
1.98      foxr     7041: 	return $passwderrors[$ErrorCode];
1.96      foxr     7042:     }
                   7043: }
                   7044: 
1.23      harris41 7045: # grabs exception and records it to log before exiting
                   7046: sub catchexception {
1.27      albertel 7047:     my ($error)=@_;
1.25      www      7048:     $SIG{'QUIT'}='DEFAULT';
                   7049:     $SIG{__DIE__}='DEFAULT';
1.165     albertel 7050:     &status("Catching exception");
1.190     albertel 7051:     &logthis("<font color='red'>CRITICAL: "
1.373     albertel 7052:      ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
1.27      albertel 7053:      ."a crash with this error msg->[$error]</font>");
1.57      www      7054:     &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27      albertel 7055:     if ($client) { print $client "error: $error\n"; }
1.59      www      7056:     $server->close();
1.27      albertel 7057:     die($error);
1.23      harris41 7058: }
1.63      www      7059: sub timeout {
1.165     albertel 7060:     &status("Handling Timeout");
1.190     albertel 7061:     &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63      www      7062:     &catchexception('Timeout');
                   7063: }
1.22      harris41 7064: # -------------------------------- Set signal handlers to record abnormal exits
                   7065: 
1.226     foxr     7066: 
1.22      harris41 7067: $SIG{'QUIT'}=\&catchexception;
                   7068: $SIG{__DIE__}=\&catchexception;
                   7069: 
1.81      matthew  7070: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95      harris41 7071: &status("Read loncapa.conf and loncapa_apache.conf");
                   7072: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141     foxr     7073: %perlvar=%{$perlvarref};
1.80      harris41 7074: undef $perlvarref;
1.19      www      7075: 
1.35      harris41 7076: # ----------------------------- Make sure this process is running from user=www
                   7077: my $wwwid=getpwnam('www');
                   7078: if ($wwwid!=$<) {
1.489.2.43.2.  1(raebur 7079:4):    my $emailto="$perlvar{'lonAdmEMail'} $perlvar{'lonSysEMail'}";
1.134     albertel 7080:    my $subj="LON: $currenthostid User ID mismatch";
1.489.2.31  raeburn  7081:    system("echo 'User ID mismatch.  lond must be run as user www.' |".
                   7082:           " mail -s '$subj' $emailto > /dev/null");
1.35      harris41 7083:    exit 1;
                   7084: }
                   7085: 
1.19      www      7086: # --------------------------------------------- Check if other instance running
                   7087: 
                   7088: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
                   7089: 
                   7090: if (-e $pidfile) {
                   7091:    my $lfh=IO::File->new("$pidfile");
                   7092:    my $pide=<$lfh>;
                   7093:    chomp($pide);
1.29      harris41 7094:    if (kill 0 => $pide) { die "already running"; }
1.19      www      7095: }
1.1       albertel 7096: 
                   7097: # ------------------------------------------------------------- Read hosts file
                   7098: 
                   7099: 
                   7100: 
                   7101: # establish SERVER socket, bind and listen.
                   7102: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
                   7103:                                 Type      => SOCK_STREAM,
                   7104:                                 Proto     => 'tcp',
1.469     foxr     7105:                                 ReuseAddr     => 1,
1.1       albertel 7106:                                 Listen    => 10 )
1.29      harris41 7107:   or die "making socket: $@\n";
1.1       albertel 7108: 
                   7109: # --------------------------------------------------------- Do global variables
                   7110: 
                   7111: # global variables
                   7112: 
1.134     albertel 7113: my %children               = ();       # keys are current child process IDs
1.1       albertel 7114: 
                   7115: sub REAPER {                        # takes care of dead children
                   7116:     $SIG{CHLD} = \&REAPER;
1.165     albertel 7117:     &status("Handling child death");
1.178     foxr     7118:     my $pid;
                   7119:     do {
                   7120: 	$pid = waitpid(-1,&WNOHANG());
                   7121: 	if (defined($children{$pid})) {
                   7122: 	    &logthis("Child $pid died");
                   7123: 	    delete($children{$pid});
1.183     albertel 7124: 	} elsif ($pid > 0) {
1.178     foxr     7125: 	    &logthis("Unknown Child $pid died");
                   7126: 	}
                   7127:     } while ( $pid > 0 );
                   7128:     foreach my $child (keys(%children)) {
                   7129: 	$pid = waitpid($child,&WNOHANG());
                   7130: 	if ($pid > 0) {
                   7131: 	    &logthis("Child $child - $pid looks like we missed it's death");
                   7132: 	    delete($children{$pid});
                   7133: 	}
1.176     albertel 7134:     }
1.165     albertel 7135:     &status("Finished Handling child death");
1.1       albertel 7136: }
                   7137: 
                   7138: sub HUNTSMAN {                      # signal handler for SIGINT
1.165     albertel 7139:     &status("Killing children (INT)");
1.1       albertel 7140:     local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children
                   7141:     kill 'INT' => keys %children;
1.59      www      7142:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1       albertel 7143:     my $execdir=$perlvar{'lonDaemons'};
                   7144:     unlink("$execdir/logs/lond.pid");
1.190     albertel 7145:     &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165     albertel 7146:     &status("Done killing children");
1.1       albertel 7147:     exit;                           # clean up with dignity
                   7148: }
                   7149: 
                   7150: sub HUPSMAN {                      # signal handler for SIGHUP
                   7151:     local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children
1.165     albertel 7152:     &status("Killing children for restart (HUP)");
1.1       albertel 7153:     kill 'INT' => keys %children;
1.59      www      7154:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190     albertel 7155:     &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134     albertel 7156:     my $execdir=$perlvar{'lonDaemons'};
1.30      harris41 7157:     unlink("$execdir/logs/lond.pid");
1.165     albertel 7158:     &status("Restarting self (HUP)");
1.1       albertel 7159:     exec("$execdir/lond");         # here we go again
                   7160: }
                   7161: 
1.144     foxr     7162: #
1.148     foxr     7163: #  Reload the Apache daemon's state.
1.150     foxr     7164: #  This is done by invoking /home/httpd/perl/apachereload
                   7165: #  a setuid perl script that can be root for us to do this job.
1.148     foxr     7166: #
                   7167: sub ReloadApache {
1.473     raeburn  7168: # --------------------------- Handle case of another apachereload process (locking)
1.474     raeburn  7169:     if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
                   7170:         my $execdir = $perlvar{'lonDaemons'};
                   7171:         my $script  = $execdir."/apachereload";
                   7172:         system($script);
                   7173:         unlink('/tmp/lock_apachereload'); #  Remove the lock file.
                   7174:     }
1.148     foxr     7175: }
                   7176: 
                   7177: #
1.144     foxr     7178: #   Called in response to a USR2 signal.
                   7179: #   - Reread hosts.tab
                   7180: #   - All children connected to hosts that were removed from hosts.tab
                   7181: #     are killed via SIGINT
                   7182: #   - All children connected to previously existing hosts are sent SIGUSR1
                   7183: #   - Our internal hosts hash is updated to reflect the new contents of
                   7184: #     hosts.tab causing connections from hosts added to hosts.tab to
                   7185: #     now be honored.
                   7186: #
                   7187: sub UpdateHosts {
1.165     albertel 7188:     &status("Reload hosts.tab");
1.147     foxr     7189:     logthis('<font color="blue"> Updating connections </font>');
1.148     foxr     7190:     #
                   7191:     #  The %children hash has the set of IP's we currently have children
                   7192:     #  on.  These need to be matched against records in the hosts.tab
                   7193:     #  Any ip's no longer in the table get killed off they correspond to
                   7194:     #  either dropped or changed hosts.  Note that the re-read of the table
                   7195:     #  will take care of new and changed hosts as connections come into being.
                   7196: 
1.371     albertel 7197:     &Apache::lonnet::reset_hosts_info();
1.148     foxr     7198: 
1.368     albertel 7199:     foreach my $child (keys(%children)) {
1.148     foxr     7200: 	my $childip = $children{$child};
1.374     albertel 7201: 	if ($childip ne '127.0.0.1'
                   7202: 	    && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
1.149     foxr     7203: 	    logthis('<font color="blue"> UpdateHosts killing child '
                   7204: 		    ." $child for ip $childip </font>");
1.148     foxr     7205: 	    kill('INT', $child);
1.149     foxr     7206: 	} else {
                   7207: 	    logthis('<font color="green"> keeping child for ip '
                   7208: 		    ." $childip (pid=$child) </font>");
1.148     foxr     7209: 	}
                   7210:     }
                   7211:     ReloadApache;
1.165     albertel 7212:     &status("Finished reloading hosts.tab");
1.144     foxr     7213: }
                   7214: 
1.148     foxr     7215: 
1.57      www      7216: sub checkchildren {
1.165     albertel 7217:     &status("Checking on the children (sending signals)");
1.57      www      7218:     &initnewstatus();
                   7219:     &logstatus();
                   7220:     &logthis('Going to check on the children');
1.134     albertel 7221:     my $docdir=$perlvar{'lonDocRoot'};
1.61      harris41 7222:     foreach (sort keys %children) {
1.221     albertel 7223: 	#sleep 1;
1.57      www      7224:         unless (kill 'USR1' => $_) {
                   7225: 	    &logthis ('Child '.$_.' is dead');
                   7226:             &logstatus($$.' is dead');
1.221     albertel 7227: 	    delete($children{$_});
1.57      www      7228:         } 
1.61      harris41 7229:     }
1.63      www      7230:     sleep 5;
1.212     foxr     7231:     $SIG{ALRM} = sub { Debug("timeout"); 
                   7232: 		       die "timeout";  };
1.113     albertel 7233:     $SIG{__DIE__} = 'DEFAULT';
1.165     albertel 7234:     &status("Checking on the children (waiting for reports)");
1.63      www      7235:     foreach (sort keys %children) {
                   7236:         unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113     albertel 7237:           eval {
                   7238:             alarm(300);
1.63      www      7239: 	    &logthis('Child '.$_.' did not respond');
1.67      albertel 7240: 	    kill 9 => $_;
1.131     albertel 7241: 	    #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                   7242: 	    #$subj="LON: $currenthostid killed lond process $_";
                   7243: 	    #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
                   7244: 	    #$execdir=$perlvar{'lonDaemons'};
                   7245: 	    #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221     albertel 7246: 	    delete($children{$_});
1.113     albertel 7247: 	    alarm(0);
                   7248: 	  }
1.63      www      7249:         }
                   7250:     }
1.113     albertel 7251:     $SIG{ALRM} = 'DEFAULT';
1.155     albertel 7252:     $SIG{__DIE__} = \&catchexception;
1.165     albertel 7253:     &status("Finished checking children");
1.221     albertel 7254:     &logthis('Finished Checking children');
1.57      www      7255: }
                   7256: 
1.1       albertel 7257: # --------------------------------------------------------------------- Logging
                   7258: 
                   7259: sub logthis {
                   7260:     my $message=shift;
                   7261:     my $execdir=$perlvar{'lonDaemons'};
                   7262:     my $fh=IO::File->new(">>$execdir/logs/lond.log");
                   7263:     my $now=time;
                   7264:     my $local=localtime($now);
1.58      www      7265:     $lastlog=$local.': '.$message;
1.1       albertel 7266:     print $fh "$local ($$): $message\n";
                   7267: }
                   7268: 
1.77      foxr     7269: # ------------------------- Conditional log if $DEBUG true.
                   7270: sub Debug {
                   7271:     my $message = shift;
                   7272:     if($DEBUG) {
                   7273: 	&logthis($message);
                   7274:     }
                   7275: }
1.161     foxr     7276: 
                   7277: #
                   7278: #   Sub to do replies to client.. this gives a hook for some
                   7279: #   debug tracing too:
                   7280: #  Parameters:
                   7281: #     fd      - File open on client.
                   7282: #     reply   - Text to send to client.
                   7283: #     request - Original request from client.
                   7284: #
                   7285: sub Reply {
1.192     foxr     7286:     my ($fd, $reply, $request) = @_;
1.387     albertel 7287:     if (ref($reply)) {
                   7288: 	print $fd $$reply;
                   7289: 	print $fd "\n";
                   7290: 	if ($DEBUG) { Debug("Request was $request  Reply was $$reply"); }
                   7291:     } else {
                   7292: 	print $fd $reply;
                   7293: 	if ($DEBUG) { Debug("Request was $request  Reply was $reply"); }
                   7294:     }
1.212     foxr     7295:     $Transactions++;
                   7296: }
                   7297: 
                   7298: 
                   7299: #
                   7300: #    Sub to report a failure.
                   7301: #    This function:
                   7302: #     -   Increments the failure statistic counters.
                   7303: #     -   Invokes Reply to send the error message to the client.
                   7304: # Parameters:
                   7305: #    fd       - File descriptor open on the client
                   7306: #    reply    - Reply text to emit.
                   7307: #    request  - The original request message (used by Reply
                   7308: #               to debug if that's enabled.
                   7309: # Implicit outputs:
                   7310: #    $Failures- The number of failures is incremented.
                   7311: #    Reply (invoked here) sends a message to the 
                   7312: #    client:
                   7313: #
                   7314: sub Failure {
                   7315:     my $fd      = shift;
                   7316:     my $reply   = shift;
                   7317:     my $request = shift;
                   7318:    
                   7319:     $Failures++;
                   7320:     Reply($fd, $reply, $request);      # That's simple eh?
1.161     foxr     7321: }
1.57      www      7322: # ------------------------------------------------------------------ Log status
                   7323: 
                   7324: sub logstatus {
1.178     foxr     7325:     &status("Doing logging");
                   7326:     my $docdir=$perlvar{'lonDocRoot'};
                   7327:     {
                   7328: 	my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200     matthew  7329:         print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178     foxr     7330:         $fh->close();
                   7331:     }
1.221     albertel 7332:     &status("Finished $$.txt");
                   7333:     {
                   7334: 	open(LOG,">>$docdir/lon-status/londstatus.txt");
                   7335: 	flock(LOG,LOCK_EX);
                   7336: 	print LOG $$."\t".$clientname."\t".$currenthostid."\t"
                   7337: 	    .$status."\t".$lastlog."\t $keymode\n";
1.275     albertel 7338: 	flock(LOG,LOCK_UN);
1.221     albertel 7339: 	close(LOG);
                   7340:     }
1.178     foxr     7341:     &status("Finished logging");
1.57      www      7342: }
                   7343: 
                   7344: sub initnewstatus {
                   7345:     my $docdir=$perlvar{'lonDocRoot'};
                   7346:     my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
1.460     foxr     7347:     my $now=time();
1.57      www      7348:     my $local=localtime($now);
                   7349:     print $fh "LOND status $local - parent $$\n\n";
1.64      www      7350:     opendir(DIR,"$docdir/lon-status/londchld");
1.134     albertel 7351:     while (my $filename=readdir(DIR)) {
1.64      www      7352:         unlink("$docdir/lon-status/londchld/$filename");
                   7353:     }
                   7354:     closedir(DIR);
1.57      www      7355: }
                   7356: 
                   7357: # -------------------------------------------------------------- Status setting
                   7358: 
                   7359: sub status {
                   7360:     my $what=shift;
                   7361:     my $now=time;
                   7362:     my $local=localtime($now);
1.178     foxr     7363:     $status=$local.': '.$what;
                   7364:     $0='lond: '.$what.' '.$local;
1.57      www      7365: }
1.11      www      7366: 
1.13      www      7367: # -------------------------------------------------------------- Talk to lonsql
                   7368: 
1.234     foxr     7369: sub sql_reply {
1.12      harris41 7370:     my ($cmd)=@_;
1.234     foxr     7371:     my $answer=&sub_sql_reply($cmd);
                   7372:     if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12      harris41 7373:     return $answer;
                   7374: }
                   7375: 
1.234     foxr     7376: sub sub_sql_reply {
1.12      harris41 7377:     my ($cmd)=@_;
                   7378:     my $unixsock="mysqlsock";
                   7379:     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
                   7380:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                   7381:                                       Type    => SOCK_STREAM,
                   7382:                                       Timeout => 10)
                   7383:        or return "con_lost";
1.319     www      7384:     print $sclient "$cmd:$currentdomainid\n";
1.12      harris41 7385:     my $answer=<$sclient>;
                   7386:     chomp($answer);
                   7387:     if (!$answer) { $answer="con_lost"; }
                   7388:     return $answer;
                   7389: }
                   7390: 
1.1       albertel 7391: # --------------------------------------- Is this the home server of an author?
1.11      www      7392: 
1.1       albertel 7393: sub ishome {
                   7394:     my $author=shift;
                   7395:     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
                   7396:     my ($udom,$uname)=split(/\//,$author);
                   7397:     my $proname=propath($udom,$uname);
                   7398:     if (-e $proname) {
                   7399: 	return 'owner';
                   7400:     } else {
                   7401:         return 'not_owner';
                   7402:     }
                   7403: }
                   7404: 
                   7405: # ======================================================= Continue main program
                   7406: # ---------------------------------------------------- Fork once and dissociate
                   7407: 
1.134     albertel 7408: my $fpid=fork;
1.1       albertel 7409: exit if $fpid;
1.29      harris41 7410: die "Couldn't fork: $!" unless defined ($fpid);
1.1       albertel 7411: 
1.29      harris41 7412: POSIX::setsid() or die "Can't start new session: $!";
1.1       albertel 7413: 
                   7414: # ------------------------------------------------------- Write our PID on disk
                   7415: 
1.134     albertel 7416: my $execdir=$perlvar{'lonDaemons'};
1.1       albertel 7417: open (PIDSAVE,">$execdir/logs/lond.pid");
                   7418: print PIDSAVE "$$\n";
                   7419: close(PIDSAVE);
1.190     albertel 7420: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57      www      7421: &status('Starting');
1.1       albertel 7422: 
1.106     foxr     7423: 
1.1       albertel 7424: 
                   7425: # ----------------------------------------------------- Install signal handlers
                   7426: 
1.57      www      7427: 
1.1       albertel 7428: $SIG{CHLD} = \&REAPER;
                   7429: $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   7430: $SIG{HUP}  = \&HUPSMAN;
1.57      www      7431: $SIG{USR1} = \&checkchildren;
1.144     foxr     7432: $SIG{USR2} = \&UpdateHosts;
1.106     foxr     7433: 
1.148     foxr     7434: #  Read the host hashes:
1.368     albertel 7435: &Apache::lonnet::load_hosts_tab();
1.447     raeburn  7436: my %iphost = &Apache::lonnet::get_iphost(1);
1.106     foxr     7437: 
1.480     raeburn  7438: $dist=`$perlvar{'lonDaemons'}/distprobe`;
1.286     albertel 7439: 
1.471     raeburn  7440: my $arch = `uname -i`;
1.475     raeburn  7441: chomp($arch);
1.471     raeburn  7442: if ($arch eq 'unknown') {
                   7443:     $arch = `uname -m`;
1.475     raeburn  7444:     chomp($arch);
1.471     raeburn  7445: }
                   7446: 
1.106     foxr     7447: # --------------------------------------------------------------
                   7448: #   Accept connections.  When a connection comes in, it is validated
                   7449: #   and if good, a child process is created to process transactions
                   7450: #   along the connection.
                   7451: 
1.1       albertel 7452: while (1) {
1.165     albertel 7453:     &status('Starting accept');
1.106     foxr     7454:     $client = $server->accept() or next;
1.165     albertel 7455:     &status('Accepted '.$client.' off to spawn');
1.386     albertel 7456:     make_new_child($client);
1.165     albertel 7457:     &status('Finished spawning');
1.1       albertel 7458: }
                   7459: 
1.212     foxr     7460: sub make_new_child {
                   7461:     my $pid;
                   7462: #    my $cipher;     # Now global
                   7463:     my $sigset;
1.178     foxr     7464: 
1.212     foxr     7465:     $client = shift;
                   7466:     &status('Starting new child '.$client);
                   7467:     &logthis('<font color="green"> Attempting to start child ('.$client.
                   7468: 	     ")</font>");    
                   7469:     # block signal for fork
                   7470:     $sigset = POSIX::SigSet->new(SIGINT);
                   7471:     sigprocmask(SIG_BLOCK, $sigset)
                   7472:         or die "Can't block SIGINT for fork: $!\n";
1.178     foxr     7473: 
1.212     foxr     7474:     die "fork: $!" unless defined ($pid = fork);
1.178     foxr     7475: 
1.212     foxr     7476:     $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
                   7477: 	                               # connection liveness.
1.178     foxr     7478: 
1.212     foxr     7479:     #
                   7480:     #  Figure out who we're talking to so we can record the peer in 
                   7481:     #  the pid hash.
                   7482:     #
                   7483:     my $caller = getpeername($client);
                   7484:     my ($port,$iaddr);
                   7485:     if (defined($caller) && length($caller) > 0) {
                   7486: 	($port,$iaddr)=unpack_sockaddr_in($caller);
                   7487:     } else {
                   7488: 	&logthis("Unable to determine who caller was, getpeername returned nothing");
                   7489:     }
                   7490:     if (defined($iaddr)) {
                   7491: 	$clientip  = inet_ntoa($iaddr);
                   7492: 	Debug("Connected with $clientip");
                   7493:     } else {
                   7494: 	&logthis("Unable to determine clientip");
                   7495: 	$clientip='Unavailable';
                   7496:     }
                   7497:     
                   7498:     if ($pid) {
                   7499:         # Parent records the child's birth and returns.
                   7500:         sigprocmask(SIG_UNBLOCK, $sigset)
                   7501:             or die "Can't unblock SIGINT for fork: $!\n";
                   7502:         $children{$pid} = $clientip;
                   7503:         &status('Started child '.$pid);
1.462     foxr     7504: 	close($client);
1.212     foxr     7505:         return;
                   7506:     } else {
                   7507:         # Child can *not* return from this subroutine.
                   7508:         $SIG{INT} = 'DEFAULT';      # make SIGINT kill us as it did before
                   7509:         $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 
                   7510:                                 #don't get intercepted
                   7511:         $SIG{USR1}= \&logstatus;
                   7512:         $SIG{ALRM}= \&timeout;
1.468     foxr     7513: 	#
                   7514: 	# Block sigpipe as it gets thrownon socket disconnect and we want to 
                   7515: 	# deal with that as a read faiure instead.
                   7516: 	#
                   7517: 	my $blockset = POSIX::SigSet->new(SIGPIPE);
                   7518: 	sigprocmask(SIG_BLOCK, $blockset);
                   7519: 
1.212     foxr     7520:         $lastlog='Forked ';
                   7521:         $status='Forked';
1.178     foxr     7522: 
1.212     foxr     7523:         # unblock signals
                   7524:         sigprocmask(SIG_UNBLOCK, $sigset)
                   7525:             or die "Can't unblock SIGINT for fork: $!\n";
1.178     foxr     7526: 
1.212     foxr     7527: #        my $tmpsnum=0;            # Now global
                   7528: #---------------------------------------------------- kerberos 5 initialization
                   7529:         &Authen::Krb5::init_context();
1.489.2.16  raeburn  7530: 
                   7531:         my $no_ets;
1.489.2.43  raeburn  7532:         if ($dist =~ /^(?:centos|rhes|scientific|oracle|rocky|alma)(\d+)/) {
1.489.2.16  raeburn  7533:             if ($1 >= 7) {
                   7534:                 $no_ets = 1;
                   7535:             }
                   7536:         } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
                   7537:             if (($1 eq '9.3') || ($1 >= 12.2)) {
                   7538:                 $no_ets = 1;
                   7539:             }
1.489.2.17  raeburn  7540:         } elsif ($dist =~ /^sles(\d+)$/) {
                   7541:             if ($1 > 11) {
                   7542:                 $no_ets = 1;
                   7543:             }
1.489.2.16  raeburn  7544:         } elsif ($dist =~ /^fedora(\d+)$/) {
                   7545:             if ($1 < 7) {
                   7546:                 $no_ets = 1;
                   7547:             }
                   7548:         }
                   7549:         unless ($no_ets) {
                   7550:             &Authen::Krb5::init_ets();
                   7551:         }
1.209     albertel 7552: 
1.212     foxr     7553: 	&status('Accepted connection');
                   7554: # =============================================================================
                   7555:             # do something with the connection
                   7556: # -----------------------------------------------------------------------------
                   7557: 	# see if we know client and 'check' for spoof IP by ineffective challenge
1.178     foxr     7558: 
1.278     albertel 7559: 	my $outsideip=$clientip;
                   7560: 	if ($clientip eq '127.0.0.1') {
1.368     albertel 7561: 	    $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
1.278     albertel 7562: 	}
1.412     foxr     7563: 	&ReadManagerTable();
1.368     albertel 7564: 	my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
1.278     albertel 7565: 	my $ismanager=($managers{$outsideip}    ne undef);
1.432     raeburn  7566: 	$clientname  = "[unknown]";
1.212     foxr     7567: 	if($clientrec) {	# Establish client type.
                   7568: 	    $ConnectionType = "client";
1.368     albertel 7569: 	    $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
1.212     foxr     7570: 	    if($ismanager) {
                   7571: 		$ConnectionType = "both";
                   7572: 	    }
                   7573: 	} else {
                   7574: 	    $ConnectionType = "manager";
1.278     albertel 7575: 	    $clientname = $managers{$outsideip};
1.212     foxr     7576: 	}
                   7577: 	my $clientok;
1.178     foxr     7578: 
1.212     foxr     7579: 	if ($clientrec || $ismanager) {
                   7580: 	    &status("Waiting for init from $clientip $clientname");
                   7581: 	    &logthis('<font color="yellow">INFO: Connection, '.
                   7582: 		     $clientip.
                   7583: 		  " ($clientname) connection type = $ConnectionType </font>" );
                   7584: 	    &status("Connecting $clientip  ($clientname))"); 
                   7585: 	    my $remotereq=<$client>;
                   7586: 	    chomp($remotereq);
                   7587: 	    Debug("Got init: $remotereq");
1.337     albertel 7588: 
1.212     foxr     7589: 	    if ($remotereq =~ /^init/) {
                   7590: 		&sethost("sethost:$perlvar{'lonHostID'}");
                   7591: 		#
                   7592: 		#  If the remote is attempting a local init... give that a try:
                   7593: 		#
1.432     raeburn  7594: 		(my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
1.489.2.4  raeburn  7595:                 # For LON-CAPA 2.9, the  client session will have sent its LON-CAPA
                   7596:                 # version when initiating the connection. For LON-CAPA 2.8 and older,
                   7597:                 # the version is retrieved from the global %loncaparevs in lonnet.pm.
                   7598:                 # $clientversion contains path to keyfile if $inittype eq 'local'
                   7599:                 # it's overridden below in this case
                   7600:                 $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
1.209     albertel 7601: 
1.212     foxr     7602: 		# If the connection type is ssl, but I didn't get my
                   7603: 		# certificate files yet, then I'll drop  back to 
                   7604: 		# insecure (if allowed).
                   7605: 		
                   7606: 		if($inittype eq "ssl") {
                   7607: 		    my ($ca, $cert) = lonssl::CertificateFile;
                   7608: 		    my $kfile       = lonssl::KeyFile;
                   7609: 		    if((!$ca)   || 
                   7610: 		       (!$cert) || 
                   7611: 		       (!$kfile)) {
                   7612: 			$inittype = ""; # This forces insecure attempt.
                   7613: 			&logthis("<font color=\"blue\"> Certificates not "
                   7614: 				 ."installed -- trying insecure auth</font>");
1.224     foxr     7615: 		    } else {	# SSL certificates are in place so
1.212     foxr     7616: 		    }		# Leave the inittype alone.
                   7617: 		}
                   7618: 
                   7619: 		if($inittype eq "local") {
1.432     raeburn  7620:                     $clientversion = $perlvar{'lonVersion'};
1.212     foxr     7621: 		    my $key = LocalConnection($client, $remotereq);
                   7622: 		    if($key) {
                   7623: 			Debug("Got local key $key");
                   7624: 			$clientok     = 1;
                   7625: 			my $cipherkey = pack("H32", $key);
                   7626: 			$cipher       = new IDEA($cipherkey);
                   7627: 			print $client "ok:local\n";
1.442     www      7628: 			&logthis('<font color="green">'
1.212     foxr     7629: 				 . "Successful local authentication </font>");
                   7630: 			$keymode = "local"
1.178     foxr     7631: 		    } else {
1.212     foxr     7632: 			Debug("Failed to get local key");
                   7633: 			$clientok = 0;
                   7634: 			shutdown($client, 3);
                   7635: 			close $client;
1.178     foxr     7636: 		    }
1.212     foxr     7637: 		} elsif ($inittype eq "ssl") {
                   7638: 		    my $key = SSLConnection($client);
                   7639: 		    if ($key) {
                   7640: 			$clientok = 1;
                   7641: 			my $cipherkey = pack("H32", $key);
                   7642: 			$cipher       = new IDEA($cipherkey);
                   7643: 			&logthis('<font color="green">'
                   7644: 				 ."Successfull ssl authentication with $clientname </font>");
                   7645: 			$keymode = "ssl";
                   7646: 	     
1.178     foxr     7647: 		    } else {
1.212     foxr     7648: 			$clientok = 0;
                   7649: 			close $client;
1.178     foxr     7650: 		    }
1.212     foxr     7651: 	   
                   7652: 		} else {
                   7653: 		    my $ok = InsecureConnection($client);
                   7654: 		    if($ok) {
                   7655: 			$clientok = 1;
                   7656: 			&logthis('<font color="green">'
                   7657: 				 ."Successful insecure authentication with $clientname </font>");
                   7658: 			print $client "ok\n";
                   7659: 			$keymode = "insecure";
1.178     foxr     7660: 		    } else {
1.212     foxr     7661: 			&logthis('<font color="yellow">'
                   7662: 				  ."Attempted insecure connection disallowed </font>");
                   7663: 			close $client;
                   7664: 			$clientok = 0;
1.178     foxr     7665: 		    }
                   7666: 		}
1.212     foxr     7667: 	    } else {
                   7668: 		&logthis(
                   7669: 			 "<font color='blue'>WARNING: "
                   7670: 			 ."$clientip failed to initialize: >$remotereq< </font>");
                   7671: 		&status('No init '.$clientip);
                   7672: 	    }
                   7673: 	} else {
                   7674: 	    &logthis(
                   7675: 		     "<font color='blue'>WARNING: Unknown client $clientip</font>");
                   7676: 	    &status('Hung up on '.$clientip);
                   7677: 	}
                   7678:  
                   7679: 	if ($clientok) {
                   7680: # ---------------- New known client connecting, could mean machine online again
1.368     albertel 7681: 	    if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip 
1.367     albertel 7682: 		&& $clientip ne '127.0.0.1') {
1.375     albertel 7683: 		&Apache::lonnet::reconlonc($clientname);
1.212     foxr     7684: 	    }
                   7685: 	    &logthis("<font color='green'>Established connection: $clientname</font>");
                   7686: 	    &status('Will listen to '.$clientname);
                   7687: # ------------------------------------------------------------ Process requests
                   7688: 	    my $keep_going = 1;
                   7689: 	    my $user_input;
1.448     raeburn  7690:             my $clienthost = &Apache::lonnet::hostname($clientname);
                   7691:             my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
                   7692:             $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
1.212     foxr     7693: 	    while(($user_input = get_request) && $keep_going) {
                   7694: 		alarm(120);
                   7695: 		Debug("Main: Got $user_input\n");
                   7696: 		$keep_going = &process_request($user_input);
1.178     foxr     7697: 		alarm(0);
1.489.2.42  raeburn  7698: 		&status('Listening to '.$clientname." ($keymode)");
1.161     foxr     7699: 	    }
1.212     foxr     7700: 
1.59      www      7701: # --------------------------------------------- client unknown or fishy, refuse
1.212     foxr     7702: 	}  else {
1.161     foxr     7703: 	    print $client "refused\n";
                   7704: 	    $client->close();
1.190     albertel 7705: 	    &logthis("<font color='blue'>WARNING: "
1.161     foxr     7706: 		     ."Rejected client $clientip, closing connection</font>");
                   7707: 	}
1.212     foxr     7708:     }            
1.161     foxr     7709:     
1.1       albertel 7710: # =============================================================================
1.161     foxr     7711:     
1.190     albertel 7712:     &logthis("<font color='red'>CRITICAL: "
1.161     foxr     7713: 	     ."Disconnect from $clientip ($clientname)</font>");    
1.489.2.42  raeburn  7714: 
                   7715: 
1.161     foxr     7716:     # this exit is VERY important, otherwise the child will become
                   7717:     # a producer of more and more children, forking yourself into
                   7718:     # process death.
                   7719:     exit;
1.106     foxr     7720:     
1.78      foxr     7721: }
1.261     foxr     7722: #
                   7723: #   Determine if a user is an author for the indicated domain.
                   7724: #
                   7725: # Parameters:
                   7726: #    domain          - domain to check in .
                   7727: #    user            - Name of user to check.
                   7728: #
                   7729: # Return:
                   7730: #     1             - User is an author for domain.
                   7731: #     0             - User is not an author for domain.
                   7732: sub is_author {
                   7733:     my ($domain, $user) = @_;
                   7734: 
                   7735:     &Debug("is_author: $user @ $domain");
                   7736: 
                   7737:     my $hashref = &tie_user_hash($domain, $user, "roles",
                   7738: 				 &GDBM_READER());
                   7739: 
                   7740:     #  Author role should show up as a key /domain/_au
1.78      foxr     7741: 
1.321     albertel 7742:     my $value;
1.487     foxr     7743:     if ($hashref) {
1.78      foxr     7744: 
1.487     foxr     7745: 	my $key    = "/$domain/_au";
                   7746: 	if (defined($hashref)) {
                   7747: 	    $value = $hashref->{$key};
                   7748: 	    if(!untie_user_hash($hashref)) {
                   7749: 		return 'error: ' .  ($!+0)." untie (GDBM) Failed";
                   7750: 	    }
                   7751: 	}
                   7752: 	
                   7753: 	if(defined($value)) {
                   7754: 	    &Debug("$user @ $domain is an author");
                   7755: 	}
                   7756:     } else {
                   7757: 	return 'error: '.($!+0)." tie (GDBM) Failed";
1.261     foxr     7758:     }
                   7759: 
                   7760:     return defined($value);
                   7761: }
1.78      foxr     7762: #
                   7763: #   Checks to see if the input roleput request was to set
1.482     www      7764: # an author role.  If so, creates construction space 
1.78      foxr     7765: # Parameters:
                   7766: #    request   - The request sent to the rolesput subchunk.
                   7767: #                We're looking for  /domain/_au
                   7768: #    domain    - The domain in which the user is having roles doctored.
                   7769: #    user      - Name of the user for which the role is being put.
                   7770: #    authtype  - The authentication type associated with the user.
                   7771: #
1.289     albertel 7772: sub manage_permissions {
1.192     foxr     7773:     my ($request, $domain, $user, $authtype) = @_;
1.78      foxr     7774:     # See if the request is of the form /$domain/_au
1.289     albertel 7775:     if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.484     raeburn  7776:         my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
1.482     www      7777:         unless (-e $path) {        
                   7778:            mkdir($path);
                   7779:         }
                   7780:         unless (-e $path.'/'.$user) {
                   7781:            mkdir($path.'/'.$user);
                   7782:         }
1.78      foxr     7783:     }
                   7784: }
1.222     foxr     7785: 
                   7786: 
                   7787: #
                   7788: #  Return the full path of a user password file, whether it exists or not.
                   7789: # Parameters:
                   7790: #   domain     - Domain in which the password file lives.
                   7791: #   user       - name of the user.
                   7792: # Returns:
                   7793: #    Full passwd path:
                   7794: #
                   7795: sub password_path {
                   7796:     my ($domain, $user) = @_;
1.264     albertel 7797:     return &propath($domain, $user).'/passwd';
1.222     foxr     7798: }
                   7799: 
                   7800: #   Password Filename
                   7801: #   Returns the path to a passwd file given domain and user... only if
                   7802: #  it exists.
                   7803: # Parameters:
                   7804: #   domain    - Domain in which to search.
                   7805: #   user      - username.
                   7806: # Returns:
                   7807: #   - If the password file exists returns its path.
                   7808: #   - If the password file does not exist, returns undefined.
                   7809: #
                   7810: sub password_filename {
                   7811:     my ($domain, $user) = @_;
                   7812: 
                   7813:     Debug ("PasswordFilename called: dom = $domain user = $user");
                   7814: 
                   7815:     my $path  = &password_path($domain, $user);
                   7816:     Debug("PasswordFilename got path: $path");
                   7817:     if(-e $path) {
                   7818: 	return $path;
                   7819:     } else {
                   7820: 	return undef;
                   7821:     }
                   7822: }
                   7823: 
                   7824: #
                   7825: #   Rewrite the contents of the user's passwd file.
                   7826: #  Parameters:
                   7827: #    domain    - domain of the user.
                   7828: #    name      - User's name.
                   7829: #    contents  - New contents of the file.
1.489.2.26  raeburn  7830: #    saveold   - (optional). If true save old file in a passwd.bak file.
1.222     foxr     7831: # Returns:
                   7832: #   0    - Failed.
                   7833: #   1    - Success.
                   7834: #
                   7835: sub rewrite_password_file {
1.489.2.26  raeburn  7836:     my ($domain, $user, $contents, $saveold) = @_;
1.222     foxr     7837: 
                   7838:     my $file = &password_filename($domain, $user);
                   7839:     if (defined $file) {
1.489.2.26  raeburn  7840:         if ($saveold) {
                   7841:             my $bakfile = $file.'.bak';
                   7842:             if (CopyFile($file,$bakfile)) {
                   7843:                 chmod(0400,$bakfile);
                   7844:                 &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain");
                   7845:             } else {
                   7846:                 &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain");
                   7847:             }
                   7848:         }
1.222     foxr     7849: 	my $pf = IO::File->new(">$file");
                   7850: 	if($pf) {
                   7851: 	    print $pf "$contents\n";
                   7852: 	    return 1;
                   7853: 	} else {
                   7854: 	    return 0;
                   7855: 	}
                   7856:     } else {
                   7857: 	return 0;
                   7858:     }
                   7859: 
                   7860: }
                   7861: 
1.78      foxr     7862: #
1.222     foxr     7863: #   get_auth_type - Determines the authorization type of a user in a domain.
1.78      foxr     7864: 
                   7865: #     Returns the authorization type or nouser if there is no such user.
                   7866: #
1.436     raeburn  7867: sub get_auth_type {
1.192     foxr     7868:     my ($domain, $user)  = @_;
1.78      foxr     7869: 
1.222     foxr     7870:     Debug("get_auth_type( $domain, $user ) \n");
1.78      foxr     7871:     my $proname    = &propath($domain, $user); 
                   7872:     my $passwdfile = "$proname/passwd";
                   7873:     if( -e $passwdfile ) {
                   7874: 	my $pf = IO::File->new($passwdfile);
                   7875: 	my $realpassword = <$pf>;
                   7876: 	chomp($realpassword);
1.79      foxr     7877: 	Debug("Password info = $realpassword\n");
1.78      foxr     7878: 	my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79      foxr     7879: 	Debug("Authtype = $authtype, content = $contentpwd\n");
1.259     raeburn  7880: 	return "$authtype:$contentpwd";     
1.224     foxr     7881:     } else {
1.79      foxr     7882: 	Debug("Returning nouser");
1.78      foxr     7883: 	return "nouser";
                   7884:     }
1.1       albertel 7885: }
                   7886: 
1.220     foxr     7887: #
                   7888: #  Validate a user given their domain, name and password.  This utility
                   7889: #  function is used by both  AuthenticateHandler and ChangePasswordHandler
                   7890: #  to validate the login credentials of a user.
                   7891: # Parameters:
                   7892: #    $domain    - The domain being logged into (this is required due to
                   7893: #                 the capability for multihomed systems.
                   7894: #    $user      - The name of the user being validated.
                   7895: #    $password  - The user's propoposed password.
                   7896: #
                   7897: # Returns:
                   7898: #     1        - The domain,user,pasword triplet corresponds to a valid
                   7899: #                user.
                   7900: #     0        - The domain,user,password triplet is not a valid user.
                   7901: #
                   7902: sub validate_user {
1.396     raeburn  7903:     my ($domain, $user, $password, $checkdefauth) = @_;
1.220     foxr     7904: 
                   7905:     # Why negative ~pi you may well ask?  Well this function is about
                   7906:     # authentication, and therefore very important to get right.
                   7907:     # I've initialized the flag that determines whether or not I've 
                   7908:     # validated correctly to a value it's not supposed to get.
                   7909:     # At the end of this function. I'll ensure that it's not still that
                   7910:     # value so we don't just wind up returning some accidental value
                   7911:     # as a result of executing an unforseen code path that
1.249     foxr     7912:     # did not set $validated.  At the end of valid execution paths,
                   7913:     # validated shoule be 1 for success or 0 for failuer.
1.220     foxr     7914: 
                   7915:     my $validated = -3.14159;
                   7916: 
                   7917:     #  How we authenticate is determined by the type of authentication
                   7918:     #  the user has been assigned.  If the authentication type is
                   7919:     #  "nouser", the user does not exist so we will return 0.
                   7920: 
1.222     foxr     7921:     my $contents = &get_auth_type($domain, $user);
1.220     foxr     7922:     my ($howpwd, $contentpwd) = split(/:/, $contents);
                   7923: 
                   7924:     my $null = pack("C",0);	# Used by kerberos auth types.
                   7925: 
1.395     raeburn  7926:     if ($howpwd eq 'nouser') {
1.396     raeburn  7927:         if ($checkdefauth) {
                   7928:             my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
                   7929:             if ($domdefaults{'auth_def'} eq 'localauth') {
                   7930:                 $howpwd = $domdefaults{'auth_def'};
                   7931:                 $contentpwd = $domdefaults{'auth_arg_def'};
                   7932:             } elsif ((($domdefaults{'auth_def'} eq 'krb4') || 
                   7933:                       ($domdefaults{'auth_def'} eq 'krb5')) &&
                   7934:                      ($domdefaults{'auth_arg_def'} ne '')) {
1.489.2.43.2.  (raeburn 7935:):                 #
                   7936:):                 # Don't attempt authentication for username and password supplied
                   7937:):                 # for user without an account if username contains @ to avoid
                   7938:):                 # call to &Authen::Krb5::parse_name() which will result in con_lost
                   7939:):                 #
                   7940:):                 unless ($user =~ /\@/) {
                   7941:):                     $howpwd = $domdefaults{'auth_def'};
                   7942:):                     $contentpwd = $domdefaults{'auth_arg_def'};
                   7943:):                 }
1.396     raeburn  7944:             }
1.395     raeburn  7945:         }
1.489.2.26  raeburn  7946:     }
1.220     foxr     7947:     if ($howpwd ne 'nouser') {
                   7948: 	if($howpwd eq "internal") { # Encrypted is in local password file.
1.489.2.21  raeburn  7949:             if (length($contentpwd) == 13) {
                   7950:                 $validated = (crypt($password,$contentpwd) eq $contentpwd);
                   7951:                 if ($validated) {
1.489.2.26  raeburn  7952:                     my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
                   7953:                     if ($domdefaults{'intauth_switch'}) {
                   7954:                         my $ncpass = &hash_passwd($domain,$password);
                   7955:                         my $saveold;
                   7956:                         if ($domdefaults{'intauth_switch'} == 2) {
                   7957:                             $saveold = 1;
                   7958:                         }
                   7959:                         if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) {
                   7960:                             &update_passwd_history($user,$domain,$howpwd,'conversion');
                   7961:                             &logthis("Validated password hashed with bcrypt for $user:$domain");
                   7962:                         }
1.489.2.21  raeburn  7963:                     }
                   7964:                 }
                   7965:             } else {
1.489.2.26  raeburn  7966:                 $validated = &check_internal_passwd($password,$contentpwd,$domain,$user);
1.489.2.21  raeburn  7967:             }
1.220     foxr     7968: 	}
                   7969: 	elsif ($howpwd eq "unix") { # User is a normal unix user.
                   7970: 	    $contentpwd = (getpwnam($user))[1];
                   7971: 	    if($contentpwd) {
                   7972: 		if($contentpwd eq 'x') { # Shadow password file...
                   7973: 		    my $pwauth_path = "/usr/local/sbin/pwauth";
                   7974: 		    open PWAUTH,  "|$pwauth_path" or
                   7975: 			die "Cannot invoke authentication";
                   7976: 		    print PWAUTH "$user\n$password\n";
                   7977: 		    close PWAUTH;
                   7978: 		    $validated = ! $?;
                   7979: 
                   7980: 		} else { 	         # Passwords in /etc/passwd. 
                   7981: 		    $validated = (crypt($password,
                   7982: 					$contentpwd) eq $contentpwd);
                   7983: 		}
                   7984: 	    } else {
                   7985: 		$validated = 0;
                   7986: 	    }
1.439     raeburn  7987: 	} elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
                   7988:             my $checkwithkrb5 = 0;
                   7989:             if ($dist =~/^fedora(\d+)$/) {
                   7990:                 if ($1 > 11) {
                   7991:                     $checkwithkrb5 = 1;
                   7992:                 }
                   7993:             } elsif ($dist =~ /^suse([\d.]+)$/) {
                   7994:                 if ($1 > 11.1) {
                   7995:                     $checkwithkrb5 = 1; 
                   7996:                 }
                   7997:             }
                   7998:             if ($checkwithkrb5) {
                   7999:                 $validated = &krb5_authen($password,$null,$user,$contentpwd);
                   8000:             } else {
                   8001:                 $validated = &krb4_authen($password,$null,$user,$contentpwd);
                   8002:             }
1.224     foxr     8003: 	} elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.439     raeburn  8004:             $validated = &krb5_authen($password,$null,$user,$contentpwd);
1.224     foxr     8005: 	} elsif ($howpwd eq "localauth") { 
1.220     foxr     8006: 	    #  Authenticate via installation specific authentcation method:
                   8007: 	    $validated = &localauth::localauth($user, 
                   8008: 					       $password, 
1.353     albertel 8009: 					       $contentpwd,
                   8010: 					       $domain);
1.358     albertel 8011: 	    if ($validated < 0) {
1.357     albertel 8012: 		&logthis("localauth for $contentpwd $user:$domain returned a $validated");
                   8013: 		$validated = 0;
                   8014: 	    }
1.224     foxr     8015: 	} else {			# Unrecognized auth is also bad.
1.220     foxr     8016: 	    $validated = 0;
                   8017: 	}
                   8018:     } else {
                   8019: 	$validated = 0;
                   8020:     }
                   8021:     #
                   8022:     #  $validated has the correct stat of the authentication:
                   8023:     #
                   8024: 
                   8025:     unless ($validated != -3.14159) {
1.249     foxr     8026: 	#  I >really really< want to know if this happens.
                   8027: 	#  since it indicates that user authentication is badly
                   8028: 	#  broken in some code path.
                   8029:         #
                   8030: 	die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220     foxr     8031:     }
                   8032:     return $validated;
                   8033: }
                   8034: 
1.489.2.21  raeburn  8035: sub check_internal_passwd {
1.489.2.26  raeburn  8036:     my ($plainpass,$stored,$domain,$user) = @_;
1.489.2.21  raeburn  8037:     my (undef,$method,@rest) = split(/!/,$stored);
1.489.2.26  raeburn  8038:     if ($method eq 'bcrypt') {
1.489.2.21  raeburn  8039:         my $result = &hash_passwd($domain,$plainpass,@rest);
                   8040:         if ($result ne $stored) {
                   8041:             return 0;
                   8042:         }
1.489.2.26  raeburn  8043:         my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
                   8044:         if ($domdefaults{'intauth_check'}) {
                   8045:             # Upgrade to a larger number of rounds if necessary
                   8046:             my $defaultcost = $domdefaults{'intauth_cost'};
                   8047:             if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
                   8048:                 $defaultcost = 10;
                   8049:             }
                   8050:             if (int($rest[0])<int($defaultcost)) {
                   8051:                 if ($domdefaults{'intauth_check'} == 1) {
                   8052:                     my $ncpass = &hash_passwd($domain,$plainpass);
                   8053:                     if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
                   8054:                         &update_passwd_history($user,$domain,'internal','update cost');
                   8055:                         &logthis("Validated password hashed with bcrypt for $user:$domain");
                   8056:                     }
                   8057:                     return 1;
                   8058:                 } elsif ($domdefaults{'intauth_check'} == 2) {
                   8059:                     return 0;
                   8060:                 }
                   8061:             }
                   8062:         } else {
                   8063:             return 1;
1.489.2.21  raeburn  8064:         }
                   8065:     }
                   8066:     return 0;
                   8067: }
                   8068: 
                   8069: sub get_last_authchg {
                   8070:     my ($domain,$user) = @_;
                   8071:     my $lastmod;
                   8072:     my $logname = &propath($domain,$user).'/passwd.log';
                   8073:     if (-e "$logname") {
                   8074:         $lastmod = (stat("$logname"))[9];
                   8075:     }
                   8076:     return $lastmod;
                   8077: }
                   8078: 
1.439     raeburn  8079: sub krb4_authen {
                   8080:     my ($password,$null,$user,$contentpwd) = @_;
                   8081:     my $validated = 0;
                   8082:     if (!($password =~ /$null/) ) {  # Null password not allowed.
                   8083:         eval {
                   8084:             require Authen::Krb4;
                   8085:         };
                   8086:         if (!$@) {
                   8087:             my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
                   8088:                                                        "",
                   8089:                                                        $contentpwd,,
                   8090:                                                        'krbtgt',
                   8091:                                                        $contentpwd,
                   8092:                                                        1,
                   8093:                                                        $password);
                   8094:             if(!$k4error) {
                   8095:                 $validated = 1;
                   8096:             } else {
                   8097:                 $validated = 0;
                   8098:                 &logthis('krb4: '.$user.', '.$contentpwd.', '.
                   8099:                           &Authen::Krb4::get_err_txt($Authen::Krb4::error));
                   8100:             }
                   8101:         } else {
                   8102:             $validated = krb5_authen($password,$null,$user,$contentpwd);
                   8103:         }
                   8104:     }
                   8105:     return $validated;
                   8106: }
                   8107: 
                   8108: sub krb5_authen {
                   8109:     my ($password,$null,$user,$contentpwd) = @_;
                   8110:     my $validated = 0;
                   8111:     if(!($password =~ /$null/)) { # Null password not allowed.
                   8112:         my $krbclient = &Authen::Krb5::parse_name($user.'@'
                   8113:                                                   .$contentpwd);
                   8114:         my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
                   8115:         my $krbserver  = &Authen::Krb5::parse_name($krbservice);
                   8116:         my $credentials= &Authen::Krb5::cc_default();
                   8117:         $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
                   8118:                                                             .$contentpwd));
                   8119:         my $krbreturn;
                   8120:         if (exists(&Authen::Krb5::get_init_creds_password)) {
                   8121:             $krbreturn =
                   8122:                 &Authen::Krb5::get_init_creds_password($krbclient,$password,
                   8123:                                                           $krbservice);
                   8124:             $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
                   8125:         } else {
                   8126:             $krbreturn  =
                   8127:                 &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
                   8128:                                                          $password,$credentials);
                   8129:             $validated = ($krbreturn == 1);
                   8130:         }
                   8131:         if (!$validated) {
                   8132:             &logthis('krb5: '.$user.', '.$contentpwd.', '.
                   8133:                      &Authen::Krb5::error());
                   8134:         }
                   8135:     }
                   8136:     return $validated;
                   8137: }
1.220     foxr     8138: 
1.84      albertel 8139: sub addline {
                   8140:     my ($fname,$hostid,$ip,$newline)=@_;
                   8141:     my $contents;
                   8142:     my $found=0;
1.355     albertel 8143:     my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
1.134     albertel 8144:     my $sh;
1.84      albertel 8145:     if ($sh=IO::File->new("$fname.subscription")) {
                   8146: 	while (my $subline=<$sh>) {
                   8147: 	    if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
                   8148: 	}
                   8149: 	$sh->close();
                   8150:     }
                   8151:     $sh=IO::File->new(">$fname.subscription");
                   8152:     if ($contents) { print $sh $contents; }
                   8153:     if ($newline) { print $sh $newline; }
                   8154:     $sh->close();
                   8155:     return $found;
1.86      www      8156: }
                   8157: 
1.234     foxr     8158: sub get_chat {
1.324     raeburn  8159:     my ($cdom,$cname,$udom,$uname,$group)=@_;
1.310     albertel 8160: 
1.87      www      8161:     my @entries=();
1.324     raeburn  8162:     my $namespace = 'nohist_chatroom';
                   8163:     my $namespace_inroom = 'nohist_inchatroom';
1.335     albertel 8164:     if ($group ne '') {
1.324     raeburn  8165:         $namespace .= '_'.$group;
                   8166:         $namespace_inroom .= '_'.$group;
                   8167:     }
                   8168:     my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310     albertel 8169: 				 &GDBM_READER());
                   8170:     if ($hashref) {
                   8171: 	@entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311     albertel 8172: 	&untie_user_hash($hashref);
1.123     www      8173:     }
1.124     www      8174:     my @participants=();
1.134     albertel 8175:     my $cutoff=time-60;
1.324     raeburn  8176:     $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
1.310     albertel 8177: 			      &GDBM_WRCREAT());
                   8178:     if ($hashref) {
                   8179:         $hashref->{$uname.':'.$udom}=time;
                   8180:         foreach my $user (sort(keys(%$hashref))) {
                   8181: 	    if ($hashref->{$user}>$cutoff) {
                   8182: 		push(@participants, 'active_participant:'.$user);
1.123     www      8183:             }
                   8184:         }
1.311     albertel 8185:         &untie_user_hash($hashref);
1.86      www      8186:     }
1.124     www      8187:     return (@participants,@entries);
1.86      www      8188: }
                   8189: 
1.234     foxr     8190: sub chat_add {
1.324     raeburn  8191:     my ($cdom,$cname,$newchat,$group)=@_;
1.88      albertel 8192:     my @entries=();
1.142     www      8193:     my $time=time;
1.324     raeburn  8194:     my $namespace = 'nohist_chatroom';
                   8195:     my $logfile = 'chatroom.log';
1.335     albertel 8196:     if ($group ne '') {
1.324     raeburn  8197:         $namespace .= '_'.$group;
                   8198:         $logfile = 'chatroom_'.$group.'.log';
                   8199:     }
                   8200:     my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310     albertel 8201: 				 &GDBM_WRCREAT());
                   8202:     if ($hashref) {
                   8203: 	@entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88      albertel 8204: 	my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
                   8205: 	my ($thentime,$idnum)=split(/\_/,$lastid);
                   8206: 	my $newid=$time.'_000000';
                   8207: 	if ($thentime==$time) {
                   8208: 	    $idnum=~s/^0+//;
                   8209: 	    $idnum++;
                   8210: 	    $idnum=substr('000000'.$idnum,-6,6);
                   8211: 	    $newid=$time.'_'.$idnum;
                   8212: 	}
1.310     albertel 8213: 	$hashref->{$newid}=$newchat;
1.88      albertel 8214: 	my $expired=$time-3600;
1.310     albertel 8215: 	foreach my $comment (keys(%$hashref)) {
                   8216: 	    my ($thistime) = ($comment=~/(\d+)\_/);
1.88      albertel 8217: 	    if ($thistime<$expired) {
1.310     albertel 8218: 		delete $hashref->{$comment};
1.88      albertel 8219: 	    }
                   8220: 	}
1.310     albertel 8221: 	{
                   8222: 	    my $proname=&propath($cdom,$cname);
1.324     raeburn  8223: 	    if (open(CHATLOG,">>$proname/$logfile")) { 
1.310     albertel 8224: 		print CHATLOG ("$time:".&unescape($newchat)."\n");
                   8225: 	    }
                   8226: 	    close(CHATLOG);
1.142     www      8227: 	}
1.311     albertel 8228: 	&untie_user_hash($hashref);
1.86      www      8229:     }
1.84      albertel 8230: }
                   8231: 
                   8232: sub unsub {
                   8233:     my ($fname,$clientip)=@_;
                   8234:     my $result;
1.188     foxr     8235:     my $unsubs = 0;		# Number of successful unsubscribes:
                   8236: 
                   8237: 
                   8238:     # An old way subscriptions were handled was to have a 
                   8239:     # subscription marker file:
                   8240: 
                   8241:     Debug("Attempting unlink of $fname.$clientname");
1.161     foxr     8242:     if (unlink("$fname.$clientname")) {
1.188     foxr     8243: 	$unsubs++;		# Successful unsub via marker file.
                   8244:     } 
                   8245: 
                   8246:     # The more modern way to do it is to have a subscription list
                   8247:     # file:
                   8248: 
1.84      albertel 8249:     if (-e "$fname.subscription") {
1.161     foxr     8250: 	my $found=&addline($fname,$clientname,$clientip,'');
1.188     foxr     8251: 	if ($found) { 
                   8252: 	    $unsubs++;
                   8253: 	}
                   8254:     } 
                   8255: 
                   8256:     #  If either or both of these mechanisms succeeded in unsubscribing a 
                   8257:     #  resource we can return ok:
                   8258: 
                   8259:     if($unsubs) {
                   8260: 	$result = "ok\n";
1.84      albertel 8261:     } else {
1.188     foxr     8262: 	$result = "not_subscribed\n";
1.84      albertel 8263:     }
1.188     foxr     8264: 
1.84      albertel 8265:     return $result;
                   8266: }
                   8267: 
1.101     www      8268: sub currentversion {
                   8269:     my $fname=shift;
                   8270:     my $version=-1;
                   8271:     my $ulsdir='';
                   8272:     if ($fname=~/^(.+)\/[^\/]+$/) {
                   8273:        $ulsdir=$1;
                   8274:     }
1.114     albertel 8275:     my ($fnamere1,$fnamere2);
                   8276:     # remove version if already specified
1.101     www      8277:     $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114     albertel 8278:     # get the bits that go before and after the version number
                   8279:     if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
                   8280: 	$fnamere1=$1;
                   8281: 	$fnamere2='.'.$2;
                   8282:     }
1.101     www      8283:     if (-e $fname) { $version=1; }
                   8284:     if (-e $ulsdir) {
1.134     albertel 8285: 	if(-d $ulsdir) {
                   8286: 	    if (opendir(LSDIR,$ulsdir)) {
1.489.2.43.2.  0(raebur 8287:3):                 if (-e $fname) {
                   8288:3):                     $version=0;
                   8289:3):                 }
1.134     albertel 8290: 		my $ulsfn;
                   8291: 		while ($ulsfn=readdir(LSDIR)) {
1.101     www      8292: # see if this is a regular file (ignore links produced earlier)
1.134     albertel 8293: 		    my $thisfile=$ulsdir.'/'.$ulsfn;
                   8294: 		    unless (-l $thisfile) {
1.160     www      8295: 			if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134     albertel 8296: 			    if ($1>$version) { $version=$1; }
                   8297: 			}
                   8298: 		    }
                   8299: 		}
                   8300: 		closedir(LSDIR);
                   8301: 		$version++;
                   8302: 	    }
                   8303: 	}
                   8304:     }
                   8305:     return $version;
1.101     www      8306: }
                   8307: 
                   8308: sub thisversion {
                   8309:     my $fname=shift;
                   8310:     my $version=-1;
                   8311:     if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
                   8312: 	$version=$1;
                   8313:     }
                   8314:     return $version;
                   8315: }
                   8316: 
1.84      albertel 8317: sub subscribe {
                   8318:     my ($userinput,$clientip)=@_;
                   8319:     my $result;
1.293     albertel 8320:     my ($cmd,$fname)=split(/:/,$userinput,2);
1.84      albertel 8321:     my $ownership=&ishome($fname);
                   8322:     if ($ownership eq 'owner') {
1.101     www      8323: # explitly asking for the current version?
                   8324:         unless (-e $fname) {
                   8325:             my $currentversion=&currentversion($fname);
                   8326: 	    if (&thisversion($fname)==$currentversion) {
                   8327:                 if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
                   8328: 		    my $root=$1;
                   8329:                     my $extension=$2;
                   8330:                     symlink($root.'.'.$extension,
                   8331:                             $root.'.'.$currentversion.'.'.$extension);
1.102     www      8332:                     unless ($extension=~/\.meta$/) {
                   8333:                        symlink($root.'.'.$extension.'.meta',
                   8334:                             $root.'.'.$currentversion.'.'.$extension.'.meta');
                   8335: 		    }
1.101     www      8336:                 }
                   8337:             }
                   8338:         }
1.84      albertel 8339: 	if (-e $fname) {
                   8340: 	    if (-d $fname) {
                   8341: 		$result="directory\n";
                   8342: 	    } else {
1.161     foxr     8343: 		if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134     albertel 8344: 		my $now=time;
1.161     foxr     8345: 		my $found=&addline($fname,$clientname,$clientip,
                   8346: 				   "$clientname:$clientip:$now\n");
1.84      albertel 8347: 		if ($found) { $result="$fname\n"; }
                   8348: 		# if they were subscribed to only meta data, delete that
                   8349:                 # subscription, when you subscribe to a file you also get
                   8350:                 # the metadata
                   8351: 		unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
                   8352: 		$fname=~s/\/home\/httpd\/html\/res/raw/;
1.476     raeburn  8353:                 my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
                   8354:                 $protocol = 'http' if ($protocol ne 'https');
                   8355: 		$fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
1.84      albertel 8356: 		$result="$fname\n";
                   8357: 	    }
                   8358: 	} else {
                   8359: 	    $result="not_found\n";
                   8360: 	}
                   8361:     } else {
                   8362: 	$result="rejected\n";
                   8363:     }
                   8364:     return $result;
                   8365: }
1.287     foxr     8366: #  Change the passwd of a unix user.  The caller must have
                   8367: #  first verified that the user is a loncapa user.
                   8368: #
                   8369: # Parameters:
                   8370: #    user      - Unix user name to change.
                   8371: #    pass      - New password for the user.
                   8372: # Returns:
                   8373: #    ok    - if success
                   8374: #    other - Some meaningfule error message string.
                   8375: # NOTE:
                   8376: #    invokes a setuid script to change the passwd.
                   8377: sub change_unix_password {
                   8378:     my ($user, $pass) = @_;
                   8379: 
                   8380:     &Debug("change_unix_password");
                   8381:     my $execdir=$perlvar{'lonDaemons'};
                   8382:     &Debug("Opening lcpasswd pipeline");
                   8383:     my $pf = IO::File->new("|$execdir/lcpasswd > "
                   8384: 			   ."$perlvar{'lonDaemons'}"
                   8385: 			   ."/logs/lcpasswd.log");
                   8386:     print $pf "$user\n$pass\n$pass\n";
                   8387:     close $pf;
                   8388:     my $err = $?;
                   8389:     return ($err < @passwderrors) ? $passwderrors[$err] : 
                   8390: 	"pwchange_falure - unknown error";
                   8391: 
                   8392:     
                   8393: }
                   8394: 
1.91      albertel 8395: 
                   8396: sub make_passwd_file {
1.489.2.21  raeburn  8397:     my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
1.390     raeburn  8398:     my $result="ok";
1.91      albertel 8399:     if ($umode eq 'krb4' or $umode eq 'krb5') {
                   8400: 	{
                   8401: 	    my $pf = IO::File->new(">$passfilename");
1.261     foxr     8402: 	    if ($pf) {
                   8403: 		print $pf "$umode:$npass\n";
1.489.2.21  raeburn  8404:                 &update_passwd_history($uname,$udom,$umode,$action);
1.261     foxr     8405: 	    } else {
                   8406: 		$result = "pass_file_failed_error";
                   8407: 	    }
1.91      albertel 8408: 	}
                   8409:     } elsif ($umode eq 'internal') {
1.489.2.21  raeburn  8410:         my $ncpass = &hash_passwd($udom,$npass);
1.91      albertel 8411: 	{
                   8412: 	    &Debug("Creating internal auth");
                   8413: 	    my $pf = IO::File->new(">$passfilename");
1.261     foxr     8414: 	    if($pf) {
                   8415: 		print $pf "internal:$ncpass\n"; 
1.489.2.21  raeburn  8416:                 &update_passwd_history($uname,$udom,$umode,$action);
1.261     foxr     8417: 	    } else {
                   8418: 		$result = "pass_file_failed_error";
                   8419: 	    }
1.91      albertel 8420: 	}
                   8421:     } elsif ($umode eq 'localauth') {
                   8422: 	{
                   8423: 	    my $pf = IO::File->new(">$passfilename");
1.261     foxr     8424: 	    if($pf) {
                   8425: 		print $pf "localauth:$npass\n";
1.489.2.21  raeburn  8426:                 &update_passwd_history($uname,$udom,$umode,$action);
1.261     foxr     8427: 	    } else {
                   8428: 		$result = "pass_file_failed_error";
                   8429: 	    }
1.91      albertel 8430: 	}
                   8431:     } elsif ($umode eq 'unix') {
1.489.2.8  raeburn  8432: 	&logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
                   8433: 	$result="no_new_unix_accounts";
1.91      albertel 8434:     } elsif ($umode eq 'none') {
                   8435: 	{
1.223     foxr     8436: 	    my $pf = IO::File->new("> $passfilename");
1.261     foxr     8437: 	    if($pf) {
                   8438: 		print $pf "none:\n";
                   8439: 	    } else {
                   8440: 		$result = "pass_file_failed_error";
                   8441: 	    }
1.91      albertel 8442: 	}
                   8443:     } else {
1.390     raeburn  8444: 	$result="auth_mode_error";
1.91      albertel 8445:     }
                   8446:     return $result;
1.121     albertel 8447: }
                   8448: 
1.265     albertel 8449: sub convert_photo {
                   8450:     my ($start,$dest)=@_;
                   8451:     system("convert $start $dest");
                   8452: }
                   8453: 
1.121     albertel 8454: sub sethost {
                   8455:     my ($remotereq) = @_;
                   8456:     my (undef,$hostid)=split(/:/,$remotereq);
1.322     albertel 8457:     # ignore sethost if we are already correct
                   8458:     if ($hostid eq $currenthostid) {
                   8459: 	return 'ok';
                   8460:     }
                   8461: 
1.121     albertel 8462:     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
1.368     albertel 8463:     if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}) 
                   8464: 	eq &Apache::lonnet::get_host_ip($hostid)) {
1.200     matthew  8465: 	$currenthostid  =$hostid;
1.369     albertel 8466: 	$currentdomainid=&Apache::lonnet::host_domain($hostid);
1.443     www      8467: #	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
1.121     albertel 8468:     } else {
                   8469: 	&logthis("Requested host id $hostid not an alias of ".
                   8470: 		 $perlvar{'lonHostID'}." refusing connection");
                   8471: 	return 'unable_to_set';
                   8472:     }
                   8473:     return 'ok';
                   8474: }
                   8475: 
                   8476: sub version {
                   8477:     my ($userinput)=@_;
                   8478:     $remoteVERSION=(split(/:/,$userinput))[1];
                   8479:     return "version:$VERSION";
1.127     albertel 8480: }
1.178     foxr     8481: 
1.447     raeburn  8482: sub get_usersession_config {
                   8483:     my ($dom,$name) = @_;
                   8484:     my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
                   8485:     if (defined($cached)) {
                   8486:         return $usersessionconf;
                   8487:     } else {
                   8488:         my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
                   8489:         if (ref($domconfig{'usersessions'}) eq 'HASH') {
                   8490:             &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
                   8491:             return $domconfig{'usersessions'};
                   8492:         }
                   8493:     }
                   8494:     return;
                   8495: }
1.200     matthew  8496: 
1.489.2.27  raeburn  8497: sub get_usersearch_config {
                   8498:     my ($dom,$name) = @_;
                   8499:     my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
                   8500:     if (defined($cached)) {
                   8501:         return $usersearchconf;
                   8502:     } else {
                   8503:         my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
                   8504:         &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},3600);
                   8505:         return $domconfig{'directorysrch'};
                   8506:     }
                   8507:     return;
                   8508: }
1.450     raeburn  8509: 
1.471     raeburn  8510: sub distro_and_arch {
                   8511:     return $dist.':'.$arch;
                   8512: }
                   8513: 
1.61      harris41 8514: # ----------------------------------- POD (plain old documentation, CPAN style)
                   8515: 
                   8516: =head1 NAME
                   8517: 
                   8518: lond - "LON Daemon" Server (port "LOND" 5663)
                   8519: 
                   8520: =head1 SYNOPSIS
                   8521: 
1.74      harris41 8522: Usage: B<lond>
                   8523: 
                   8524: Should only be run as user=www.  This is a command-line script which
                   8525: is invoked by B<loncron>.  There is no expectation that a typical user
                   8526: will manually start B<lond> from the command-line.  (In other words,
                   8527: DO NOT START B<lond> YOURSELF.)
1.61      harris41 8528: 
                   8529: =head1 DESCRIPTION
                   8530: 
1.74      harris41 8531: There are two characteristics associated with the running of B<lond>,
                   8532: PROCESS MANAGEMENT (starting, stopping, handling child processes)
                   8533: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
                   8534: subscriptions, etc).  These are described in two large
                   8535: sections below.
                   8536: 
                   8537: B<PROCESS MANAGEMENT>
                   8538: 
1.61      harris41 8539: Preforker - server who forks first. Runs as a daemon. HUPs.
                   8540: Uses IDEA encryption
                   8541: 
1.74      harris41 8542: B<lond> forks off children processes that correspond to the other servers
                   8543: in the network.  Management of these processes can be done at the
                   8544: parent process level or the child process level.
                   8545: 
                   8546: B<logs/lond.log> is the location of log messages.
                   8547: 
                   8548: The process management is now explained in terms of linux shell commands,
                   8549: subroutines internal to this code, and signal assignments:
                   8550: 
                   8551: =over 4
                   8552: 
                   8553: =item *
                   8554: 
                   8555: PID is stored in B<logs/lond.pid>
                   8556: 
                   8557: This is the process id number of the parent B<lond> process.
                   8558: 
                   8559: =item *
                   8560: 
                   8561: SIGTERM and SIGINT
                   8562: 
                   8563: Parent signal assignment:
                   8564:  $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   8565: 
                   8566: Child signal assignment:
                   8567:  $SIG{INT}  = 'DEFAULT'; (and SIGTERM is DEFAULT also)
                   8568: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
                   8569:  to restart a new child.)
                   8570: 
                   8571: Command-line invocations:
                   8572:  B<kill> B<-s> SIGTERM I<PID>
                   8573:  B<kill> B<-s> SIGINT I<PID>
                   8574: 
                   8575: Subroutine B<HUNTSMAN>:
                   8576:  This is only invoked for the B<lond> parent I<PID>.
                   8577: This kills all the children, and then the parent.
                   8578: The B<lonc.pid> file is cleared.
                   8579: 
                   8580: =item *
                   8581: 
                   8582: SIGHUP
                   8583: 
                   8584: Current bug:
                   8585:  This signal can only be processed the first time
                   8586: on the parent process.  Subsequent SIGHUP signals
                   8587: have no effect.
                   8588: 
                   8589: Parent signal assignment:
                   8590:  $SIG{HUP}  = \&HUPSMAN;
                   8591: 
                   8592: Child signal assignment:
                   8593:  none (nothing happens)
                   8594: 
                   8595: Command-line invocations:
                   8596:  B<kill> B<-s> SIGHUP I<PID>
                   8597: 
                   8598: Subroutine B<HUPSMAN>:
                   8599:  This is only invoked for the B<lond> parent I<PID>,
                   8600: This kills all the children, and then the parent.
                   8601: The B<lond.pid> file is cleared.
                   8602: 
                   8603: =item *
                   8604: 
                   8605: SIGUSR1
                   8606: 
                   8607: Parent signal assignment:
                   8608:  $SIG{USR1} = \&USRMAN;
                   8609: 
                   8610: Child signal assignment:
                   8611:  $SIG{USR1}= \&logstatus;
                   8612: 
                   8613: Command-line invocations:
                   8614:  B<kill> B<-s> SIGUSR1 I<PID>
                   8615: 
                   8616: Subroutine B<USRMAN>:
                   8617:  When invoked for the B<lond> parent I<PID>,
                   8618: SIGUSR1 is sent to all the children, and the status of
                   8619: each connection is logged.
1.144     foxr     8620: 
                   8621: =item *
                   8622: 
                   8623: SIGUSR2
                   8624: 
                   8625: Parent Signal assignment:
                   8626:     $SIG{USR2} = \&UpdateHosts
                   8627: 
                   8628: Child signal assignment:
                   8629:     NONE
                   8630: 
1.74      harris41 8631: 
                   8632: =item *
                   8633: 
                   8634: SIGCHLD
                   8635: 
                   8636: Parent signal assignment:
                   8637:  $SIG{CHLD} = \&REAPER;
                   8638: 
                   8639: Child signal assignment:
                   8640:  none
                   8641: 
                   8642: Command-line invocations:
                   8643:  B<kill> B<-s> SIGCHLD I<PID>
                   8644: 
                   8645: Subroutine B<REAPER>:
                   8646:  This is only invoked for the B<lond> parent I<PID>.
                   8647: Information pertaining to the child is removed.
                   8648: The socket port is cleaned up.
                   8649: 
                   8650: =back
                   8651: 
                   8652: B<SERVER-SIDE ACTIVITIES>
                   8653: 
                   8654: Server-side information can be accepted in an encrypted or non-encrypted
                   8655: method.
                   8656: 
                   8657: =over 4
                   8658: 
                   8659: =item ping
                   8660: 
                   8661: Query a client in the hosts.tab table; "Are you there?"
                   8662: 
                   8663: =item pong
                   8664: 
                   8665: Respond to a ping query.
                   8666: 
                   8667: =item ekey
                   8668: 
                   8669: Read in encrypted key, make cipher.  Respond with a buildkey.
                   8670: 
                   8671: =item load
                   8672: 
                   8673: Respond with CPU load based on a computation upon /proc/loadavg.
                   8674: 
                   8675: =item currentauth
                   8676: 
                   8677: Reply with current authentication information (only over an
                   8678: encrypted channel).
                   8679: 
                   8680: =item auth
                   8681: 
                   8682: Only over an encrypted channel, reply as to whether a user's
                   8683: authentication information can be validated.
                   8684: 
                   8685: =item passwd
                   8686: 
                   8687: Allow for a password to be set.
                   8688: 
                   8689: =item makeuser
                   8690: 
                   8691: Make a user.
                   8692: 
                   8693: =item passwd
                   8694: 
                   8695: Allow for authentication mechanism and password to be changed.
                   8696: 
                   8697: =item home
1.61      harris41 8698: 
1.74      harris41 8699: Respond to a question "are you the home for a given user?"
                   8700: 
                   8701: =item update
                   8702: 
                   8703: Update contents of a subscribed resource.
                   8704: 
                   8705: =item unsubscribe
                   8706: 
                   8707: The server is unsubscribing from a resource.
                   8708: 
                   8709: =item subscribe
                   8710: 
                   8711: The server is subscribing to a resource.
                   8712: 
                   8713: =item log
                   8714: 
                   8715: Place in B<logs/lond.log>
                   8716: 
                   8717: =item put
                   8718: 
                   8719: stores hash in namespace
                   8720: 
1.489.2.2  raeburn  8721: =item rolesput
1.74      harris41 8722: 
                   8723: put a role into a user's environment
                   8724: 
                   8725: =item get
                   8726: 
                   8727: returns hash with keys from array
                   8728: reference filled in from namespace
                   8729: 
                   8730: =item eget
                   8731: 
                   8732: returns hash with keys from array
                   8733: reference filled in from namesp (encrypts the return communication)
                   8734: 
                   8735: =item rolesget
                   8736: 
                   8737: get a role from a user's environment
                   8738: 
                   8739: =item del
                   8740: 
                   8741: deletes keys out of array from namespace
                   8742: 
                   8743: =item keys
                   8744: 
                   8745: returns namespace keys
                   8746: 
                   8747: =item dump
                   8748: 
                   8749: dumps the complete (or key matching regexp) namespace into a hash
                   8750: 
                   8751: =item store
                   8752: 
                   8753: stores hash permanently
                   8754: for this url; hashref needs to be given and should be a \%hashname; the
                   8755: remaining args aren't required and if they aren't passed or are '' they will
                   8756: be derived from the ENV
                   8757: 
                   8758: =item restore
                   8759: 
                   8760: returns a hash for a given url
                   8761: 
                   8762: =item querysend
                   8763: 
                   8764: Tells client about the lonsql process that has been launched in response
                   8765: to a sent query.
                   8766: 
                   8767: =item queryreply
                   8768: 
                   8769: Accept information from lonsql and make appropriate storage in temporary
                   8770: file space.
                   8771: 
                   8772: =item idput
                   8773: 
                   8774: Defines usernames as corresponding to IDs.  (These "IDs" are unique identifiers
                   8775: for each student, defined perhaps by the institutional Registrar.)
                   8776: 
                   8777: =item idget
                   8778: 
                   8779: Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
                   8780: for each student, defined perhaps by the institutional Registrar.)
                   8781: 
                   8782: =item tmpput
                   8783: 
                   8784: Accept and store information in temporary space.
                   8785: 
                   8786: =item tmpget
                   8787: 
                   8788: Send along temporarily stored information.
                   8789: 
                   8790: =item ls
                   8791: 
                   8792: List part of a user's directory.
                   8793: 
1.135     foxr     8794: =item pushtable
                   8795: 
                   8796: Pushes a file in /home/httpd/lonTab directory.  Currently limited to:
                   8797: hosts.tab and domain.tab. The old file is copied to  *.tab.backup but
                   8798: must be restored manually in case of a problem with the new table file.
                   8799: pushtable requires that the request be encrypted and validated via
                   8800: ValidateManager.  The form of the command is:
                   8801: enc:pushtable tablename <tablecontents> \n
                   8802: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 
                   8803: cleartext newline.
                   8804: 
1.74      harris41 8805: =item Hanging up (exit or init)
                   8806: 
                   8807: What to do when a client tells the server that they (the client)
                   8808: are leaving the network.
                   8809: 
                   8810: =item unknown command
                   8811: 
                   8812: If B<lond> is sent an unknown command (not in the list above),
                   8813: it replys to the client "unknown_cmd".
1.135     foxr     8814: 
1.74      harris41 8815: 
                   8816: =item UNKNOWN CLIENT
                   8817: 
                   8818: If the anti-spoofing algorithm cannot verify the client,
                   8819: the client is rejected (with a "refused" message sent
                   8820: to the client, and the connection is closed.
                   8821: 
                   8822: =back
1.61      harris41 8823: 
                   8824: =head1 PREREQUISITES
                   8825: 
                   8826: IO::Socket
                   8827: IO::File
                   8828: Apache::File
                   8829: POSIX
                   8830: Crypt::IDEA
                   8831: LWP::UserAgent()
                   8832: GDBM_File
                   8833: Authen::Krb4
1.91      albertel 8834: Authen::Krb5
1.61      harris41 8835: 
                   8836: =head1 COREQUISITES
                   8837: 
                   8838: =head1 OSNAMES
                   8839: 
                   8840: linux
                   8841: 
                   8842: =head1 SCRIPT CATEGORIES
                   8843: 
                   8844: Server/Process
                   8845: 
                   8846: =cut
1.409     foxr     8847: 
                   8848: 
                   8849: =pod
                   8850: 
                   8851: =head1 LOG MESSAGES
                   8852: 
                   8853: The messages below can be emitted in the lond log.  This log is located
                   8854: in ~httpd/perl/logs/lond.log  Many log messages have HTML encapsulation
                   8855: to provide coloring if examined from inside a web page. Some do not.
                   8856: Where color is used, the colors are; Red for sometihhng to get excited
                   8857: about and to follow up on. Yellow for something to keep an eye on to
                   8858: be sure it does not get worse, Green,and Blue for informational items.
                   8859: 
                   8860: In the discussions below, sometimes reference is made to ~httpd
                   8861: when describing file locations.  There isn't really an httpd 
                   8862: user, however there is an httpd directory that gets installed in the
                   8863: place that user home directories go.  On linux, this is usually
                   8864: (always?) /home/httpd.
                   8865: 
                   8866: 
                   8867: Some messages are colorless.  These are usually (not always)
                   8868: Green/Blue color level messages.
                   8869: 
                   8870: =over 2
                   8871: 
                   8872: =item (Red)  LocalConnection rejecting non local: <ip> ne 127.0.0.1
                   8873: 
                   8874: A local connection negotiation was attempted by
                   8875: a host whose IP address was not 127.0.0.1.
                   8876: The socket is closed and the child will exit.
                   8877: lond has three ways to establish an encyrption
                   8878: key with a client:
                   8879: 
                   8880: =over 2
                   8881: 
                   8882: =item local 
                   8883: 
                   8884: The key is written and read from a file.
                   8885: This is only valid for connections from localhost.
                   8886: 
                   8887: =item insecure 
                   8888: 
                   8889: The key is generated by the server and
                   8890: transmitted to the client.
                   8891: 
                   8892: =item  ssl (secure)
                   8893: 
                   8894: An ssl connection is negotiated with the client,
                   8895: the key is generated by the server and sent to the 
                   8896: client across this ssl connection before the
                   8897: ssl connectionis terminated and clear text
                   8898: transmission resumes.
                   8899: 
                   8900: =back
                   8901: 
                   8902: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
                   8903: 
                   8904: The client is local but has not sent an initialization
                   8905: string that is the literal "init:local"  The connection
                   8906: is closed and the child exits.
                   8907: 
                   8908: =item Red CRITICAL Can't get key file <error>        
                   8909: 
                   8910: SSL key negotiation is being attempted but the call to
                   8911: lonssl::KeyFile  failed.  This usually means that the
                   8912: configuration file is not correctly defining or protecting
                   8913: the directories/files lonCertificateDirectory or
                   8914: lonnetPrivateKey
                   8915: <error> is a string that describes the reason that
                   8916: the key file could not be located.
                   8917: 
                   8918: =item (Red) CRITICAL  Can't get certificates <error>  
                   8919: 
                   8920: SSL key negotiation failed because we were not able to retrives our certificate
                   8921: or the CA's certificate in the call to lonssl::CertificateFile
                   8922: <error> is the textual reason this failed.  Usual reasons:
                   8923: 
                   8924: =over 2
                   8925:        
                   8926: =item Apache config file for loncapa  incorrect:
                   8927:  
                   8928: one of the variables 
                   8929: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
                   8930: undefined or incorrect
                   8931: 
                   8932: =item Permission error:
                   8933: 
                   8934: The directory pointed to by lonCertificateDirectory is not readable by lond
                   8935: 
                   8936: =item Permission error:
                   8937: 
                   8938: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
                   8939: 
                   8940: =item Installation error:                         
                   8941: 
                   8942: Either the certificate authority file or the certificate have not
                   8943: been installed in lonCertificateDirectory.
                   8944: 
                   8945: =item (Red) CRITICAL SSL Socket promotion failed:  <err> 
                   8946: 
                   8947: The promotion of the connection from plaintext to SSL failed
                   8948: <err> is the reason for the failure.  There are two
                   8949: system calls involved in the promotion (one of which failed), 
                   8950: a dup to produce
                   8951: a second fd on the raw socket over which the encrypted data
                   8952: will flow and IO::SOcket::SSL->new_from_fd which creates
                   8953: the SSL connection on the duped fd.
                   8954: 
                   8955: =item (Blue)   WARNING client did not respond to challenge 
                   8956: 
                   8957: This occurs on an insecure (non SSL) connection negotiation request.
                   8958: lond generates some number from the time, the PID and sends it to
                   8959: the client.  The client must respond by echoing this information back.
                   8960: If the client does not do so, that's a violation of the challenge
                   8961: protocols and the connection will be failed.
                   8962: 
                   8963: =item (Red) No manager table. Nobody can manage!!    
                   8964: 
                   8965: lond has the concept of privileged hosts that
                   8966: can perform remote management function such
                   8967: as update the hosts.tab.   The manager hosts
                   8968: are described in the 
                   8969: ~httpd/lonTabs/managers.tab file.
                   8970: this message is logged if this file is missing.
                   8971: 
                   8972: 
                   8973: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
                   8974: 
                   8975: Reports the successful parse and registration
                   8976: of a specific manager. 
                   8977: 
                   8978: =item Green existing host <clustername:dnsname>  
                   8979: 
                   8980: The manager host is already defined in the hosts.tab
                   8981: the information in that table, rather than the info in the
                   8982: manager table will be used to determine the manager's ip.
                   8983: 
                   8984: =item (Red) Unable to craete <filename>                 
                   8985: 
                   8986: lond has been asked to create new versions of an administrative
                   8987: file (by a manager).  When this is done, the new file is created
                   8988: in a temp file and then renamed into place so that there are always
                   8989: usable administrative files, even if the update fails.  This failure
                   8990: message means that the temp file could not be created.
                   8991: The update is abandoned, and the old file is available for use.
                   8992: 
                   8993: =item (Green) CopyFile from <oldname> to <newname> failed
                   8994: 
                   8995: In an update of administrative files, the copy of the existing file to a
                   8996: backup file failed.  The installation of the new file may still succeed,
                   8997: but there will not be a back up file to rever to (this should probably
                   8998: be yellow).
                   8999: 
                   9000: =item (Green) Pushfile: backed up <oldname> to <newname>
                   9001: 
                   9002: See above, the backup of the old administrative file succeeded.
                   9003: 
                   9004: =item (Red)  Pushfile: Unable to install <filename> <reason>
                   9005: 
                   9006: The new administrative file could not be installed.  In this case,
                   9007: the old administrative file is still in use.
                   9008: 
                   9009: =item (Green) Installed new < filename>.                      
                   9010: 
                   9011: The new administrative file was successfullly installed.                                               
                   9012: 
                   9013: =item (Red) Reinitializing lond pid=<pid>                    
                   9014: 
                   9015: The lonc child process <pid> will be sent a USR2 
                   9016: signal.
                   9017: 
                   9018: =item (Red) Reinitializing self                                    
                   9019: 
                   9020: We've been asked to re-read our administrative files,and
                   9021: are doing so.
                   9022: 
                   9023: =item (Yellow) error:Invalid process identifier <ident>  
                   9024: 
                   9025: A reinit command was received, but the target part of the 
                   9026: command was not valid.  It must be either
                   9027: 'lond' or 'lonc' but was <ident>
                   9028: 
                   9029: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
                   9030: 
                   9031: Checking to see if lond has been handed a valid edit
                   9032: command.  It is possible the edit command is not valid
                   9033: in that case there are no log messages to indicate that.
                   9034: 
                   9035: =item Result of password change for  <username> pwchange_success
                   9036: 
                   9037: The password for <username> was
                   9038: successfully changed.
                   9039: 
                   9040: =item Unable to open <user> passwd to change password
                   9041: 
                   9042: Could not rewrite the 
                   9043: internal password file for a user
                   9044: 
                   9045: =item Result of password change for <user> : <result>
                   9046:                                                                      
                   9047: A unix password change for <user> was attempted 
                   9048: and the pipe returned <result>  
                   9049: 
                   9050: =item LWP GET: <message> for <fname> (<remoteurl>)
                   9051: 
                   9052: The lightweight process fetch for a resource failed
                   9053: with <message> the local filename that should
                   9054: have existed/been created was  <fname> the
                   9055: corresponding URI: <remoteurl>  This is emitted in several
                   9056: places.
                   9057: 
                   9058: =item Unable to move <transname> to <destname>     
                   9059: 
                   9060: From fetch_user_file_handler - the user file was replicated but could not
                   9061: be mv'd to its final location.
                   9062: 
                   9063: =item Looking for <domain> <username>              
                   9064: 
                   9065: From user_has_session_handler - This should be a Debug call instead
                   9066: it indicates lond is about to check whether the specified user has a 
                   9067: session active on the specified domain on the local host.
                   9068: 
                   9069: =item Client <ip> (<name>) hanging up: <input>     
                   9070: 
                   9071: lond has been asked to exit by its client.  The <ip> and <name> identify the
                   9072: client systemand <input> is the full exit command sent to the server.
                   9073: 
                   9074: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
                   9075:                                                  
                   9076: A lond child terminated.  NOte that this termination can also occur when the
                   9077: child receives the QUIT or DIE signals.  <pid> is the process id of the child,
                   9078: <hostname> the host lond is working for, and <message> the reason the child died
                   9079: to the best of our ability to get it (I would guess that any numeric value
                   9080: represents and errno value).  This is immediately followed by
                   9081: 
                   9082: =item  Famous last words: Catching exception - <log> 
                   9083: 
                   9084: Where log is some recent information about the state of the child.
                   9085: 
                   9086: =item Red CRITICAL: TIME OUT <pid>                     
                   9087: 
                   9088: Some timeout occured for server <pid>.  THis is normally a timeout on an LWP
                   9089: doing an HTTP::GET.
                   9090: 
                   9091: =item child <pid> died                              
                   9092: 
                   9093: The reaper caught a SIGCHILD for the lond child process <pid>
                   9094: This should be modified to also display the IP of the dying child
                   9095: $children{$pid}
                   9096: 
                   9097: =item Unknown child 0 died                           
                   9098: A child died but the wait for it returned a pid of zero which really should not
                   9099: ever happen. 
                   9100: 
                   9101: =item Child <which> - <pid> looks like we missed it's death 
                   9102: 
                   9103: When a sigchild is received, the reaper process checks all children to see if they are
                   9104: alive.  If children are dying quite quickly, the lack of signal queuing can mean
                   9105: that a signal hearalds the death of more than one child.  If so this message indicates
                   9106: which other one died. <which> is the ip of a dead child
                   9107: 
                   9108: =item Free socket: <shutdownretval>                
                   9109: 
                   9110: The HUNTSMAN sub was called due to a SIGINT in a child process.  The socket is being shutdown.
                   9111: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
                   9112: to return anything. This is followed by: 
                   9113: 
                   9114: =item Red CRITICAL: Shutting down                       
                   9115: 
                   9116: Just prior to exit.
                   9117: 
                   9118: =item Free socket: <shutdownretval>                 
                   9119: 
                   9120: The HUPSMAN sub was called due to a SIGHUP.  all children get killsed, and lond execs itself.
                   9121: This is followed by:
                   9122: 
                   9123: =item (Red) CRITICAL: Restarting                         
                   9124: 
                   9125: lond is about to exec itself to restart.
                   9126: 
                   9127: =item (Blue) Updating connections                        
                   9128: 
                   9129: (In response to a USR2).  All the children (except the one for localhost)
                   9130: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
                   9131: 
                   9132: =item (Blue) UpdateHosts killing child <pid> for ip <ip>   
                   9133: 
                   9134: Due to USR2 as above.
                   9135: 
                   9136: =item (Green) keeping child for ip <ip> (pid = <pid>)    
                   9137: 
                   9138: In response to USR2 as above, the child indicated is not being restarted because
                   9139: it's assumed that we'll always need a child for the localhost.
                   9140: 
                   9141: 
                   9142: =item Going to check on the children                
                   9143: 
                   9144: Parent is about to check on the health of the child processes.
                   9145: Note that this is in response to a USR1 sent to the parent lond.
                   9146: there may be one or more of the next two messages:
                   9147: 
                   9148: =item <pid> is dead                                 
                   9149: 
                   9150: A child that we have in our child hash as alive has evidently died.
                   9151: 
                   9152: =item  Child <pid> did not respond                   
                   9153: 
                   9154: In the health check the child <pid> did not update/produce a pid_.txt
                   9155: file when sent it's USR1 signal.  That process is killed with a 9 signal, as it's
                   9156: assumed to be hung in some un-fixable way.
                   9157: 
                   9158: =item Finished checking children                   
                   9159:  
                   9160: Master processs's USR1 processing is cojmplete.
                   9161: 
                   9162: =item (Red) CRITICAL: ------- Starting ------            
                   9163: 
                   9164: (There are more '-'s on either side).  Lond has forked itself off to 
                   9165: form a new session and is about to start actual initialization.
                   9166: 
                   9167: =item (Green) Attempting to start child (<client>)       
                   9168: 
                   9169: Started a new child process for <client>.  Client is IO::Socket object
                   9170: connected to the child.  This was as a result of a TCP/IP connection from a client.
                   9171: 
                   9172: =item Unable to determine who caller was, getpeername returned nothing
                   9173:                                                   
                   9174: In child process initialization.  either getpeername returned undef or
                   9175: a zero sized object was returned.  Processing continues, but in my opinion,
                   9176: this should be cause for the child to exit.
                   9177: 
                   9178: =item Unable to determine clientip                  
                   9179: 
                   9180: In child process initialization.  The peer address from getpeername was not defined.
                   9181: The client address is stored as "Unavailable" and processing continues.
                   9182: 
                   9183: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
                   9184:                                                   
                   9185: In child initialization.  A good connectionw as received from <ip>.
                   9186: 
                   9187: =over 2
                   9188: 
                   9189: =item <name> 
                   9190: 
                   9191: is the name of the client from hosts.tab.
                   9192: 
                   9193: =item <type> 
                   9194: 
                   9195: Is the connection type which is either 
                   9196: 
                   9197: =over 2
                   9198: 
                   9199: =item manager 
                   9200: 
                   9201: The connection is from a manager node, not in hosts.tab
                   9202: 
                   9203: =item client  
                   9204: 
                   9205: the connection is from a non-manager in the hosts.tab
                   9206: 
                   9207: =item both
                   9208: 
                   9209: The connection is from a manager in the hosts.tab.
                   9210: 
                   9211: =back
                   9212: 
                   9213: =back
                   9214: 
                   9215: =item (Blue) Certificates not installed -- trying insecure auth
                   9216: 
                   9217: One of the certificate file, key file or
                   9218: certificate authority file could not be found for a client attempting
                   9219: SSL connection intiation.  COnnection will be attemptied in in-secure mode.
                   9220: (this would be a system with an up to date lond that has not gotten a 
                   9221: certificate from us).
                   9222: 
                   9223: =item (Green)  Successful local authentication            
                   9224: 
                   9225: A local connection successfully negotiated the encryption key. 
                   9226: In this case the IDEA key is in a file (that is hopefully well protected).
                   9227: 
                   9228: =item (Green) Successful ssl authentication with <client>  
                   9229: 
                   9230: The client (<client> is the peer's name in hosts.tab), has successfully
                   9231: negotiated an SSL connection with this child process.
                   9232: 
                   9233: =item (Green) Successful insecure authentication with <client>
                   9234:                                                    
                   9235: 
                   9236: The client has successfully negotiated an  insecure connection withthe child process.
                   9237: 
                   9238: =item (Yellow) Attempted insecure connection disallowed    
                   9239: 
                   9240: The client attempted and failed to successfully negotiate a successful insecure
                   9241: connection.  This can happen either because the variable londAllowInsecure is false
                   9242: or undefined, or becuse the child did not successfully echo back the challenge
                   9243: string.
                   9244: 
                   9245: 
                   9246: =back
                   9247: 
1.441     raeburn  9248: =back
                   9249: 
1.409     foxr     9250: 
                   9251: =cut

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