Annotation of loncom/lond, revision 1.489.2.3
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.489.2.3! raeburn 5: # $Id: lond,v 1.489.2.2 2012/10/06 14:44:50 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
1.469 foxr 18:
1.60 www 19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20: # GNU General Public License for more details.
21: #
22: # You should have received a copy of the GNU General Public License
23: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 25: #
26: # /home/httpd/html/adm/gpl.txt
27: #
1.161 foxr 28:
29:
1.60 www 30: # http://www.lon-capa.org/
31: #
1.54 harris41 32:
1.134 albertel 33: use strict;
1.80 harris41 34: use lib '/home/httpd/lib/perl/';
1.325 albertel 35: use LONCAPA;
1.80 harris41 36: use LONCAPA::Configuration;
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;
1.1 albertel 57:
1.463 foxr 58: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 59:
1.57 www 60: my $status='';
61: my $lastlog='';
62:
1.489.2.3! raeburn 63: my $VERSION='$Revision: 1.489.2.2 $'; #' stupid emacs
1.121 albertel 64: my $remoteVERSION;
1.214 foxr 65: my $currenthostid="default";
1.115 albertel 66: my $currentdomainid;
1.134 albertel 67:
68: my $client;
1.200 matthew 69: my $clientip; # IP address of client.
70: my $clientname; # LonCAPA name of client.
1.448 raeburn 71: my $clientversion; # LonCAPA version running on client.
72: my $clienthomedom; # LonCAPA domain of homeID for client.
73: # primary library server.
1.140 foxr 74:
1.134 albertel 75: my $server;
1.200 matthew 76:
77: my $keymode;
1.198 foxr 78:
1.207 foxr 79: my $cipher; # Cipher key negotiated with client
80: my $tmpsnum = 0; # Id of tmpputs.
81:
1.178 foxr 82: #
83: # Connection type is:
84: # client - All client actions are allowed
85: # manager - only management functions allowed.
86: # both - Both management and client actions are allowed
87: #
1.161 foxr 88:
1.178 foxr 89: my $ConnectionType;
1.161 foxr 90:
1.178 foxr 91: my %managers; # Ip -> manager names
1.161 foxr 92:
1.178 foxr 93: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 94:
1.480 raeburn 95: my $dist;
96:
1.178 foxr 97: #
1.207 foxr 98: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
99: # Each element of the hash contains a reference to an array that contains:
100: # A reference to a sub that executes the request corresponding to the keyword.
101: # A flag that is true if the request must be encoded to be acceptable.
102: # A mask with bits as follows:
103: # CLIENT_OK - Set when the function is allowed by ordinary clients
104: # MANAGER_OK - Set when the function is allowed to manager clients.
105: #
106: my $CLIENT_OK = 1;
107: my $MANAGER_OK = 2;
108: my %Dispatcher;
109:
110:
111: #
1.178 foxr 112: # The array below are password error strings."
113: #
114: my $lastpwderror = 13; # Largest error number from lcpasswd.
115: my @passwderrors = ("ok",
1.287 foxr 116: "pwchange_failure - lcpasswd must be run as user 'www'",
117: "pwchange_failure - lcpasswd got incorrect number of arguments",
118: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
119: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
120: "pwchange_failure - lcpasswd User does not exist.",
121: "pwchange_failure - lcpasswd Incorrect current passwd",
122: "pwchange_failure - lcpasswd Unable to su to root.",
123: "pwchange_failure - lcpasswd Cannot set new passwd.",
124: "pwchange_failure - lcpasswd Username has invalid characters",
125: "pwchange_failure - lcpasswd Invalid characters in password",
126: "pwchange_failure - lcpasswd User already exists",
127: "pwchange_failure - lcpasswd Something went wrong with user addition.",
128: "pwchange_failure - lcpasswd Password mismatch",
129: "pwchange_failure - lcpasswd Error filename is invalid");
1.97 foxr 130:
131:
1.178 foxr 132: # The array below are lcuseradd error strings.:
1.97 foxr 133:
1.178 foxr 134: my $lastadderror = 13;
135: my @adderrors = ("ok",
136: "User ID mismatch, lcuseradd must run as user www",
137: "lcuseradd Incorrect number of command line parameters must be 3",
138: "lcuseradd Incorrect number of stdinput lines, must be 3",
139: "lcuseradd Too many other simultaneous pwd changes in progress",
140: "lcuseradd User does not exist",
141: "lcuseradd Unable to make www member of users's group",
142: "lcuseradd Unable to su to root",
143: "lcuseradd Unable to set password",
1.377 albertel 144: "lcuseradd Username has invalid characters",
1.178 foxr 145: "lcuseradd Password has an invalid character",
146: "lcuseradd User already exists",
147: "lcuseradd Could not add user.",
148: "lcuseradd Password mismatch");
1.97 foxr 149:
1.96 foxr 150:
1.412 foxr 151: # This array are the errors from lcinstallfile:
152:
153: my @installerrors = ("ok",
154: "Initial user id of client not that of www",
155: "Usage error, not enough command line arguments",
156: "Source file name does not exist",
157: "Destination file name does not exist",
158: "Some file operation failed",
159: "Invalid table filename."
160: );
1.207 foxr 161:
162: #
163: # Statistics that are maintained and dislayed in the status line.
164: #
1.212 foxr 165: my $Transactions = 0; # Number of attempted transactions.
166: my $Failures = 0; # Number of transcations failed.
1.207 foxr 167:
168: # ResetStatistics:
169: # Resets the statistics counters:
170: #
171: sub ResetStatistics {
172: $Transactions = 0;
173: $Failures = 0;
174: }
175:
1.200 matthew 176: #------------------------------------------------------------------------
177: #
178: # LocalConnection
179: # Completes the formation of a locally authenticated connection.
180: # This function will ensure that the 'remote' client is really the
181: # local host. If not, the connection is closed, and the function fails.
182: # If so, initcmd is parsed for the name of a file containing the
183: # IDEA session key. The fie is opened, read, deleted and the session
184: # key returned to the caller.
185: #
186: # Parameters:
187: # $Socket - Socket open on client.
188: # $initcmd - The full text of the init command.
189: #
190: # Returns:
191: # IDEA session key on success.
192: # undef on failure.
193: #
194: sub LocalConnection {
195: my ($Socket, $initcmd) = @_;
1.373 albertel 196: Debug("Attempting local connection: $initcmd client: $clientip");
1.277 albertel 197: if($clientip ne "127.0.0.1") {
1.200 matthew 198: &logthis('<font color="red"> LocalConnection rejecting non local: '
1.373 albertel 199: ."$clientip ne 127.0.0.1 </font>");
1.200 matthew 200: close $Socket;
201: return undef;
1.224 foxr 202: } else {
1.200 matthew 203: chomp($initcmd); # Get rid of \n in filename.
204: my ($init, $type, $name) = split(/:/, $initcmd);
205: Debug(" Init command: $init $type $name ");
206:
207: # Require that $init = init, and $type = local: Otherwise
208: # the caller is insane:
209:
210: if(($init ne "init") && ($type ne "local")) {
211: &logthis('<font color = "red"> LocalConnection: caller is insane! '
212: ."init = $init, and type = $type </font>");
213: close($Socket);;
214: return undef;
215:
216: }
217: # Now get the key filename:
218:
219: my $IDEAKey = lonlocal::ReadKeyFile($name);
220: return $IDEAKey;
221: }
222: }
223: #------------------------------------------------------------------------------
224: #
225: # SSLConnection
226: # Completes the formation of an ssh authenticated connection. The
227: # socket is promoted to an ssl socket. If this promotion and the associated
228: # certificate exchange are successful, the IDEA key is generated and sent
229: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
230: # the caller after the SSL tunnel is torn down.
231: #
232: # Parameters:
233: # Name Type Purpose
234: # $Socket IO::Socket::INET Plaintext socket.
235: #
236: # Returns:
237: # IDEA key on success.
238: # undef on failure.
239: #
240: sub SSLConnection {
241: my $Socket = shift;
242:
243: Debug("SSLConnection: ");
244: my $KeyFile = lonssl::KeyFile();
245: if(!$KeyFile) {
246: my $err = lonssl::LastError();
247: &logthis("<font color=\"red\"> CRITICAL"
248: ."Can't get key file $err </font>");
249: return undef;
250: }
251: my ($CACertificate,
252: $Certificate) = lonssl::CertificateFile();
253:
254:
255: # If any of the key, certificate or certificate authority
256: # certificate filenames are not defined, this can't work.
257:
258: if((!$Certificate) || (!$CACertificate)) {
259: my $err = lonssl::LastError();
260: &logthis("<font color=\"red\"> CRITICAL"
261: ."Can't get certificates: $err </font>");
262:
263: return undef;
264: }
265: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
266:
267: # Indicate to our peer that we can procede with
268: # a transition to ssl authentication:
269:
270: print $Socket "ok:ssl\n";
271:
272: Debug("Approving promotion -> ssl");
273: # And do so:
274:
275: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
276: $CACertificate,
277: $Certificate,
278: $KeyFile);
279: if(! ($SSLSocket) ) { # SSL socket promotion failed.
280: my $err = lonssl::LastError();
281: &logthis("<font color=\"red\"> CRITICAL "
282: ."SSL Socket promotion failed: $err </font>");
283: return undef;
284: }
285: Debug("SSL Promotion successful");
286:
287: #
288: # The only thing we'll use the socket for is to send the IDEA key
289: # to the peer:
290:
291: my $Key = lonlocal::CreateCipherKey();
292: print $SSLSocket "$Key\n";
293:
294: lonssl::Close($SSLSocket);
295:
296: Debug("Key exchange complete: $Key");
297:
298: return $Key;
299: }
300: #
301: # InsecureConnection:
302: # If insecure connections are allowd,
303: # exchange a challenge with the client to 'validate' the
304: # client (not really, but that's the protocol):
305: # We produce a challenge string that's sent to the client.
306: # The client must then echo the challenge verbatim to us.
307: #
308: # Parameter:
309: # Socket - Socket open on the client.
310: # Returns:
311: # 1 - success.
312: # 0 - failure (e.g.mismatch or insecure not allowed).
313: #
314: sub InsecureConnection {
315: my $Socket = shift;
316:
317: # Don't even start if insecure connections are not allowed.
318:
319: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
320: return 0;
321: }
322:
323: # Fabricate a challenge string and send it..
324:
325: my $challenge = "$$".time; # pid + time.
326: print $Socket "$challenge\n";
327: &status("Waiting for challenge reply");
328:
329: my $answer = <$Socket>;
330: $answer =~s/\W//g;
331: if($challenge eq $answer) {
332: return 1;
1.224 foxr 333: } else {
1.200 matthew 334: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
335: &status("No challenge reqply");
336: return 0;
337: }
338:
339:
340: }
1.251 foxr 341: #
342: # Safely execute a command (as long as it's not a shel command and doesn
343: # not require/rely on shell escapes. The function operates by doing a
344: # a pipe based fork and capturing stdout and stderr from the pipe.
345: #
346: # Formal Parameters:
347: # $line - A line of text to be executed as a command.
348: # Returns:
349: # The output from that command. If the output is multiline the caller
350: # must know how to split up the output.
351: #
352: #
353: sub execute_command {
354: my ($line) = @_;
355: my @words = split(/\s/, $line); # Bust the command up into words.
356: my $output = "";
357:
358: my $pid = open(CHILD, "-|");
359:
360: if($pid) { # Parent process
361: Debug("In parent process for execute_command");
362: my @data = <CHILD>; # Read the child's outupt...
363: close CHILD;
364: foreach my $output_line (@data) {
365: Debug("Adding $output_line");
366: $output .= $output_line; # Presumably has a \n on it.
367: }
368:
369: } else { # Child process
370: close (STDERR);
371: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
372: exec(@words); # won't return.
373: }
374: return $output;
375: }
376:
1.200 matthew 377:
1.140 foxr 378: # GetCertificate: Given a transaction that requires a certificate,
379: # this function will extract the certificate from the transaction
380: # request. Note that at this point, the only concept of a certificate
381: # is the hostname to which we are connected.
382: #
383: # Parameter:
384: # request - The request sent by our client (this parameterization may
385: # need to change when we really use a certificate granting
386: # authority.
387: #
388: sub GetCertificate {
389: my $request = shift;
390:
391: return $clientip;
392: }
1.161 foxr 393:
1.178 foxr 394: #
395: # Return true if client is a manager.
396: #
397: sub isManager {
398: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
399: }
400: #
401: # Return tru if client can do client functions
402: #
403: sub isClient {
404: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
405: }
1.161 foxr 406:
407:
1.156 foxr 408: #
409: # ReadManagerTable: Reads in the current manager table. For now this is
410: # done on each manager authentication because:
411: # - These authentications are not frequent
412: # - This allows dynamic changes to the manager table
413: # without the need to signal to the lond.
414: #
415: sub ReadManagerTable {
416:
1.412 foxr 417: &Debug("Reading manager table");
1.156 foxr 418: # Clean out the old table first..
419:
1.166 foxr 420: foreach my $key (keys %managers) {
421: delete $managers{$key};
422: }
423:
424: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
425: if (!open (MANAGERS, $tablename)) {
1.473 raeburn 426: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
427: if (&Apache::lonnet::is_LC_dns($hostname)) {
1.472 raeburn 428: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
429: }
430: return;
1.166 foxr 431: }
432: while(my $host = <MANAGERS>) {
433: chomp($host);
434: if ($host =~ "^#") { # Comment line.
435: next;
436: }
1.368 albertel 437: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
1.161 foxr 438: # The entry is of the form:
439: # cluname:hostname
440: # cluname - A 'cluster hostname' is needed in order to negotiate
441: # the host key.
442: # hostname- The dns name of the host.
443: #
1.166 foxr 444: my($cluname, $dnsname) = split(/:/, $host);
445:
446: my $ip = gethostbyname($dnsname);
447: if(defined($ip)) { # bad names don't deserve entry.
448: my $hostip = inet_ntoa($ip);
449: $managers{$hostip} = $cluname;
450: logthis('<font color="green"> registering manager '.
451: "$dnsname as $cluname with $hostip </font>\n");
452: }
453: } else {
454: logthis('<font color="green"> existing host'." $host</font>\n");
1.472 raeburn 455: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
1.166 foxr 456: }
457: }
1.156 foxr 458: }
1.140 foxr 459:
460: #
461: # ValidManager: Determines if a given certificate represents a valid manager.
462: # in this primitive implementation, the 'certificate' is
463: # just the connecting loncapa client name. This is checked
464: # against a valid client list in the configuration.
465: #
466: #
467: sub ValidManager {
468: my $certificate = shift;
469:
1.163 foxr 470: return isManager;
1.140 foxr 471: }
472: #
1.143 foxr 473: # CopyFile: Called as part of the process of installing a
474: # new configuration file. This function copies an existing
475: # file to a backup file.
476: # Parameters:
477: # oldfile - Name of the file to backup.
478: # newfile - Name of the backup file.
479: # Return:
480: # 0 - Failure (errno has failure reason).
481: # 1 - Success.
482: #
483: sub CopyFile {
1.192 foxr 484:
485: my ($oldfile, $newfile) = @_;
1.143 foxr 486:
1.281 matthew 487: if (! copy($oldfile,$newfile)) {
488: return 0;
1.143 foxr 489: }
1.281 matthew 490: chmod(0660, $newfile);
491: return 1;
1.143 foxr 492: }
1.157 foxr 493: #
494: # Host files are passed out with externally visible host IPs.
495: # If, for example, we are behind a fire-wall or NAT host, our
496: # internally visible IP may be different than the externally
497: # visible IP. Therefore, we always adjust the contents of the
498: # host file so that the entry for ME is the IP that we believe
499: # we have. At present, this is defined as the entry that
500: # DNS has for us. If by some chance we are not able to get a
501: # DNS translation for us, then we assume that the host.tab file
502: # is correct.
503: # BUGBUGBUG - in the future, we really should see if we can
504: # easily query the interface(s) instead.
505: # Parameter(s):
506: # contents - The contents of the host.tab to check.
507: # Returns:
508: # newcontents - The adjusted contents.
509: #
510: #
511: sub AdjustHostContents {
512: my $contents = shift;
513: my $adjusted;
514: my $me = $perlvar{'lonHostID'};
515:
1.354 albertel 516: foreach my $line (split(/\n/,$contents)) {
1.472 raeburn 517: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
518: ($line =~ /^\s*\^/))) {
1.157 foxr 519: chomp($line);
520: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
521: if ($id eq $me) {
1.354 albertel 522: my $ip = gethostbyname($name);
523: my $ipnew = inet_ntoa($ip);
524: $ip = $ipnew;
1.157 foxr 525: # Reconstruct the host line and append to adjusted:
526:
1.354 albertel 527: my $newline = "$id:$domain:$role:$name:$ip";
528: if($maxcon ne "") { # Not all hosts have loncnew tuning params
529: $newline .= ":$maxcon:$idleto:$mincon";
530: }
531: $adjusted .= $newline."\n";
1.157 foxr 532:
1.354 albertel 533: } else { # Not me, pass unmodified.
534: $adjusted .= $line."\n";
535: }
1.157 foxr 536: } else { # Blank or comment never re-written.
537: $adjusted .= $line."\n"; # Pass blanks and comments as is.
538: }
1.354 albertel 539: }
540: return $adjusted;
1.157 foxr 541: }
1.143 foxr 542: #
543: # InstallFile: Called to install an administrative file:
1.412 foxr 544: # - The file is created int a temp directory called <name>.tmp
545: # - lcinstall file is called to install the file.
546: # since the web app has no direct write access to the table directory
1.143 foxr 547: #
548: # Parameters:
549: # Name of the file
550: # File Contents.
551: # Return:
552: # nonzero - success.
553: # 0 - failure and $! has an errno.
1.412 foxr 554: # Assumptions:
555: # File installtion is a relatively infrequent
1.143 foxr 556: #
557: sub InstallFile {
1.192 foxr 558:
559: my ($Filename, $Contents) = @_;
1.412 foxr 560: # my $TempFile = $Filename.".tmp";
561: my $exedir = $perlvar{'lonDaemons'};
562: my $tmpdir = $exedir.'/tmp/';
563: my $TempFile = $tmpdir."TempTableFile.tmp";
1.143 foxr 564:
565: # Open the file for write:
566:
567: my $fh = IO::File->new("> $TempFile"); # Write to temp.
568: if(!(defined $fh)) {
569: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
570: return 0;
571: }
572: # write the contents of the file:
573:
574: print $fh ($Contents);
575: $fh->close; # In case we ever have a filesystem w. locking
576:
1.412 foxr 577: chmod(0664, $TempFile); # Everyone can write it.
578:
579: # Use lcinstall file to put the file in the table directory...
580:
581: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
582: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
583: close $pf;
584: my $err = $?;
585: &Debug("Status is $err");
586: if ($err != 0) {
587: my $msg = $err;
588: if ($err < @installerrors) {
589: $msg = $installerrors[$err];
590: }
591: &logthis("Install failed for table file $Filename : $msg");
592: return 0;
593: }
594:
595: # Remove the temp file:
1.143 foxr 596:
1.412 foxr 597: unlink($TempFile);
1.143 foxr 598:
599: return 1;
600: }
1.200 matthew 601:
602:
1.169 foxr 603: #
604: # ConfigFileFromSelector: converts a configuration file selector
1.411 foxr 605: # into a configuration file pathname.
1.472 raeburn 606: # Supports the following file selectors:
607: # hosts, domain, dns_hosts, dns_domain
1.411 foxr 608: #
1.169 foxr 609: #
610: # Parameters:
611: # selector - Configuration file selector.
612: # Returns:
613: # Full path to the file or undef if the selector is invalid.
614: #
615: sub ConfigFileFromSelector {
616: my $selector = shift;
617: my $tablefile;
618:
619: my $tabledir = $perlvar{'lonTabDir'}.'/';
1.472 raeburn 620: if (($selector eq "hosts") || ($selector eq "domain") ||
621: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
1.411 foxr 622: $tablefile = $tabledir.$selector.'.tab';
1.169 foxr 623: }
624: return $tablefile;
625: }
1.143 foxr 626: #
1.141 foxr 627: # PushFile: Called to do an administrative push of a file.
628: # - Ensure the file being pushed is one we support.
629: # - Backup the old file to <filename.saved>
630: # - Separate the contents of the new file out from the
631: # rest of the request.
632: # - Write the new file.
633: # Parameter:
634: # Request - The entire user request. This consists of a : separated
635: # string pushfile:tablename:contents.
636: # NOTE: The contents may have :'s in it as well making things a bit
637: # more interesting... but not much.
638: # Returns:
639: # String to send to client ("ok" or "refused" if bad file).
640: #
641: sub PushFile {
642: my $request = shift;
643: my ($command, $filename, $contents) = split(":", $request, 3);
1.412 foxr 644: &Debug("PushFile");
1.141 foxr 645:
646: # At this point in time, pushes for only the following tables are
647: # supported:
648: # hosts.tab ($filename eq host).
649: # domain.tab ($filename eq domain).
1.472 raeburn 650: # dns_hosts.tab ($filename eq dns_host).
651: # dns_domain.tab ($filename eq dns_domain).
1.141 foxr 652: # Construct the destination filename or reject the request.
653: #
654: # lonManage is supposed to ensure this, however this session could be
655: # part of some elaborate spoof that managed somehow to authenticate.
656: #
657:
1.169 foxr 658:
659: my $tablefile = ConfigFileFromSelector($filename);
660: if(! (defined $tablefile)) {
1.141 foxr 661: return "refused";
662: }
1.412 foxr 663:
1.157 foxr 664: # If the file being pushed is the host file, we adjust the entry for ourself so that the
665: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
666: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
667: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
668: # that possibilty.
669:
670: if($filename eq "host") {
671: $contents = AdjustHostContents($contents);
672: }
673:
1.141 foxr 674: # Install the new file:
675:
1.412 foxr 676: &logthis("Installing new $tablefile contents:\n$contents");
1.143 foxr 677: if(!InstallFile($tablefile, $contents)) {
678: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 679: .$tablefile." $! </font>");
1.143 foxr 680: return "error:$!";
1.224 foxr 681: } else {
1.143 foxr 682: &logthis('<font color="green"> Installed new '.$tablefile
1.473 raeburn 683: ." - transaction by: $clientname ($clientip)</font>");
1.472 raeburn 684: my $adminmail = $perlvar{'lonAdmEMail'};
685: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
686: if ($admindom ne '') {
687: my %domconfig =
688: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
689: if (ref($domconfig{'contacts'}) eq 'HASH') {
690: if ($domconfig{'contacts'}{'adminemail'} ne '') {
691: $adminmail = $domconfig{'contacts'}{'adminemail'};
692: }
693: }
694: }
695: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
696: my $msg = new Mail::Send;
697: $msg->to($adminmail);
698: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
699: $msg->add('Content-type','text/plain; charset=UTF-8');
700: if (my $fh = $msg->open()) {
701: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
1.473 raeburn 702: "$clientname ($clientip)\n";
1.472 raeburn 703: $fh->close;
704: }
705: }
1.143 foxr 706: }
707:
1.141 foxr 708: # Indicate success:
709:
710: return "ok";
711:
712: }
1.145 foxr 713:
714: #
715: # Called to re-init either lonc or lond.
716: #
717: # Parameters:
718: # request - The full request by the client. This is of the form
719: # reinit:<process>
720: # where <process> is allowed to be either of
721: # lonc or lond
722: #
723: # Returns:
724: # The string to be sent back to the client either:
725: # ok - Everything worked just fine.
726: # error:why - There was a failure and why describes the reason.
727: #
728: #
729: sub ReinitProcess {
730: my $request = shift;
731:
1.146 foxr 732:
733: # separate the request (reinit) from the process identifier and
734: # validate it producing the name of the .pid file for the process.
735: #
736: #
737: my ($junk, $process) = split(":", $request);
1.147 foxr 738: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 739: if($process eq 'lonc') {
740: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 741: if (!open(PIDFILE, "< $processpidfile")) {
742: return "error:Open failed for $processpidfile";
743: }
744: my $loncpid = <PIDFILE>;
745: close(PIDFILE);
746: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
747: ."</font>");
748: kill("USR2", $loncpid);
1.146 foxr 749: } elsif ($process eq 'lond') {
1.147 foxr 750: logthis('<font color="red"> Reinitializing self (lond) </font>');
751: &UpdateHosts; # Lond is us!!
1.146 foxr 752: } else {
753: &logthis('<font color="yellow" Invalid reinit request for '.$process
754: ."</font>");
755: return "error:Invalid process identifier $process";
756: }
1.145 foxr 757: return 'ok';
758: }
1.168 foxr 759: # Validate a line in a configuration file edit script:
760: # Validation includes:
761: # - Ensuring the command is valid.
762: # - Ensuring the command has sufficient parameters
763: # Parameters:
764: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 765: #
1.168 foxr 766: # Return:
767: # 0 - Invalid scriptline.
768: # 1 - Valid scriptline
769: # NOTE:
770: # Only the command syntax is checked, not the executability of the
771: # command.
772: #
773: sub isValidEditCommand {
774: my $scriptline = shift;
775:
776: # Line elements are pipe separated:
777:
778: my ($command, $key, $newline) = split(/\|/, $scriptline);
779: &logthis('<font color="green"> isValideditCommand checking: '.
780: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
781:
782: if ($command eq "delete") {
783: #
784: # key with no newline.
785: #
786: if( ($key eq "") || ($newline ne "")) {
787: return 0; # Must have key but no newline.
788: } else {
789: return 1; # Valid syntax.
790: }
1.169 foxr 791: } elsif ($command eq "replace") {
1.168 foxr 792: #
793: # key and newline:
794: #
795: if (($key eq "") || ($newline eq "")) {
796: return 0;
797: } else {
798: return 1;
799: }
1.169 foxr 800: } elsif ($command eq "append") {
801: if (($key ne "") && ($newline eq "")) {
802: return 1;
803: } else {
804: return 0;
805: }
1.168 foxr 806: } else {
807: return 0; # Invalid command.
808: }
809: return 0; # Should not get here!!!
810: }
1.169 foxr 811: #
812: # ApplyEdit - Applies an edit command to a line in a configuration
813: # file. It is the caller's responsiblity to validate the
814: # edit line.
815: # Parameters:
816: # $directive - A single edit directive to apply.
817: # Edit directives are of the form:
818: # append|newline - Appends a new line to the file.
819: # replace|key|newline - Replaces the line with key value 'key'
820: # delete|key - Deletes the line with key value 'key'.
821: # $editor - A config file editor object that contains the
822: # file being edited.
823: #
824: sub ApplyEdit {
1.192 foxr 825:
826: my ($directive, $editor) = @_;
1.169 foxr 827:
828: # Break the directive down into its command and its parameters
829: # (at most two at this point. The meaning of the parameters, if in fact
830: # they exist depends on the command).
831:
832: my ($command, $p1, $p2) = split(/\|/, $directive);
833:
834: if($command eq "append") {
835: $editor->Append($p1); # p1 - key p2 null.
836: } elsif ($command eq "replace") {
837: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
838: } elsif ($command eq "delete") {
839: $editor->DeleteLine($p1); # p1 - key p2 null.
840: } else { # Should not get here!!!
841: die "Invalid command given to ApplyEdit $command"
842: }
843: }
844: #
845: # AdjustOurHost:
846: # Adjusts a host file stored in a configuration file editor object
847: # for the true IP address of this host. This is necessary for hosts
848: # that live behind a firewall.
849: # Those hosts have a publicly distributed IP of the firewall, but
850: # internally must use their actual IP. We assume that a given
851: # host only has a single IP interface for now.
852: # Formal Parameters:
853: # editor - The configuration file editor to adjust. This
854: # editor is assumed to contain a hosts.tab file.
855: # Strategy:
856: # - Figure out our hostname.
857: # - Lookup the entry for this host.
858: # - Modify the line to contain our IP
859: # - Do a replace for this host.
860: sub AdjustOurHost {
861: my $editor = shift;
862:
863: # figure out who I am.
864:
865: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
866:
867: # Get my host file entry.
868:
869: my $ConfigLine = $editor->Find($myHostName);
870: if(! (defined $ConfigLine)) {
871: die "AdjustOurHost - no entry for me in hosts file $myHostName";
872: }
873: # figure out my IP:
874: # Use the config line to get my hostname.
875: # Use gethostbyname to translate that into an IP address.
876: #
1.338 albertel 877: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1.169 foxr 878: #
879: # Reassemble the config line from the elements in the list.
880: # Note that if the loncnew items were not present before, they will
881: # be now even if they would be empty
882: #
883: my $newConfigLine = $id;
1.338 albertel 884: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1.169 foxr 885: $newConfigLine .= ":".$item;
886: }
887: # Replace the line:
888:
889: $editor->ReplaceLine($id, $newConfigLine);
890:
891: }
892: #
893: # ReplaceConfigFile:
894: # Replaces a configuration file with the contents of a
895: # configuration file editor object.
896: # This is done by:
897: # - Copying the target file to <filename>.old
898: # - Writing the new file to <filename>.tmp
899: # - Moving <filename.tmp> -> <filename>
900: # This laborious process ensures that the system is never without
901: # a configuration file that's at least valid (even if the contents
902: # may be dated).
903: # Parameters:
904: # filename - Name of the file to modify... this is a full path.
905: # editor - Editor containing the file.
906: #
907: sub ReplaceConfigFile {
1.192 foxr 908:
909: my ($filename, $editor) = @_;
1.168 foxr 910:
1.169 foxr 911: CopyFile ($filename, $filename.".old");
912:
913: my $contents = $editor->Get(); # Get the contents of the file.
914:
915: InstallFile($filename, $contents);
916: }
1.168 foxr 917: #
918: #
919: # Called to edit a configuration table file
1.167 foxr 920: # Parameters:
921: # request - The entire command/request sent by lonc or lonManage
922: # Return:
923: # The reply to send to the client.
1.168 foxr 924: #
1.167 foxr 925: sub EditFile {
926: my $request = shift;
927:
928: # Split the command into it's pieces: edit:filetype:script
929:
1.339 albertel 930: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 931:
932: # Check the pre-coditions for success:
933:
1.339 albertel 934: if($cmd != "edit") { # Something is amiss afoot alack.
1.167 foxr 935: return "error:edit request detected, but request != 'edit'\n";
936: }
937: if( ($filetype ne "hosts") &&
938: ($filetype ne "domain")) {
939: return "error:edit requested with invalid file specifier: $filetype \n";
940: }
941:
942: # Split the edit script and check it's validity.
1.168 foxr 943:
944: my @scriptlines = split(/\n/, $script); # one line per element.
945: my $linecount = scalar(@scriptlines);
946: for(my $i = 0; $i < $linecount; $i++) {
947: chomp($scriptlines[$i]);
948: if(!isValidEditCommand($scriptlines[$i])) {
949: return "error:edit with bad script line: '$scriptlines[$i]' \n";
950: }
951: }
1.145 foxr 952:
1.167 foxr 953: # Execute the edit operation.
1.169 foxr 954: # - Create a config file editor for the appropriate file and
955: # - execute each command in the script:
956: #
957: my $configfile = ConfigFileFromSelector($filetype);
958: if (!(defined $configfile)) {
959: return "refused\n";
960: }
961: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 962:
1.169 foxr 963: for (my $i = 0; $i < $linecount; $i++) {
964: ApplyEdit($scriptlines[$i], $editor);
965: }
966: # If the file is the host file, ensure that our host is
967: # adjusted to have our ip:
968: #
969: if($filetype eq "host") {
970: AdjustOurHost($editor);
971: }
972: # Finally replace the current file with our file.
973: #
974: ReplaceConfigFile($configfile, $editor);
1.167 foxr 975:
976: return "ok\n";
977: }
1.207 foxr 978:
1.255 foxr 979: # read_profile
980: #
981: # Returns a set of specific entries from a user's profile file.
982: # this is a utility function that is used by both get_profile_entry and
983: # get_profile_entry_encrypted.
984: #
985: # Parameters:
986: # udom - Domain in which the user exists.
987: # uname - User's account name (loncapa account)
988: # namespace - The profile namespace to open.
989: # what - A set of & separated queries.
990: # Returns:
991: # If all ok: - The string that needs to be shipped back to the user.
992: # If failure - A string that starts with error: followed by the failure
993: # reason.. note that this probabyl gets shipped back to the
994: # user as well.
995: #
996: sub read_profile {
997: my ($udom, $uname, $namespace, $what) = @_;
998:
999: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1000: &GDBM_READER());
1001: if ($hashref) {
1002: my @queries=split(/\&/,$what);
1.440 raeburn 1003: if ($namespace eq 'roles') {
1004: @queries = map { &unescape($_); } @queries;
1005: }
1.255 foxr 1006: my $qresult='';
1007:
1008: for (my $i=0;$i<=$#queries;$i++) {
1009: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1010: }
1011: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1.311 albertel 1012: if (&untie_user_hash($hashref)) {
1.255 foxr 1013: return $qresult;
1014: } else {
1015: return "error: ".($!+0)." untie (GDBM) Failed";
1016: }
1017: } else {
1018: if ($!+0 == 2) {
1019: return "error:No such file or GDBM reported bad block error";
1020: } else {
1021: return "error: ".($!+0)." tie (GDBM) Failed";
1022: }
1023: }
1024:
1025: }
1.214 foxr 1026: #--------------------- Request Handlers --------------------------------------------
1027: #
1.215 foxr 1028: # By convention each request handler registers itself prior to the sub
1029: # declaration:
1.214 foxr 1030: #
1031:
1.216 foxr 1032: #++
1033: #
1.214 foxr 1034: # Handles ping requests.
1035: # Parameters:
1036: # $cmd - the actual keyword that invoked us.
1037: # $tail - the tail of the request that invoked us.
1038: # $replyfd- File descriptor connected to the client
1039: # Implicit Inputs:
1040: # $currenthostid - Global variable that carries the name of the host we are
1041: # known as.
1042: # Returns:
1043: # 1 - Ok to continue processing.
1044: # 0 - Program should exit.
1045: # Side effects:
1046: # Reply information is sent to the client.
1047: sub ping_handler {
1048: my ($cmd, $tail, $client) = @_;
1049: Debug("$cmd $tail $client .. $currenthostid:");
1050:
1.387 albertel 1051: Reply( $client,\$currenthostid,"$cmd:$tail");
1.214 foxr 1052:
1053: return 1;
1054: }
1055: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1056:
1.216 foxr 1057: #++
1.215 foxr 1058: #
1059: # Handles pong requests. Pong replies with our current host id, and
1060: # the results of a ping sent to us via our lonc.
1061: #
1062: # Parameters:
1063: # $cmd - the actual keyword that invoked us.
1064: # $tail - the tail of the request that invoked us.
1065: # $replyfd- File descriptor connected to the client
1066: # Implicit Inputs:
1067: # $currenthostid - Global variable that carries the name of the host we are
1068: # connected to.
1069: # Returns:
1070: # 1 - Ok to continue processing.
1071: # 0 - Program should exit.
1072: # Side effects:
1073: # Reply information is sent to the client.
1074: sub pong_handler {
1075: my ($cmd, $tail, $replyfd) = @_;
1076:
1.365 albertel 1077: my $reply=&Apache::lonnet::reply("ping",$clientname);
1.215 foxr 1078: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1079: return 1;
1080: }
1081: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1082:
1.216 foxr 1083: #++
1084: # Called to establish an encrypted session key with the remote client.
1085: # Note that with secure lond, in most cases this function is never
1086: # invoked. Instead, the secure session key is established either
1087: # via a local file that's locked down tight and only lives for a short
1088: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1089: # bits from /dev/urandom, rather than the predictable pattern used by
1090: # by this sub. This sub is only used in the old-style insecure
1091: # key negotiation.
1092: # Parameters:
1093: # $cmd - the actual keyword that invoked us.
1094: # $tail - the tail of the request that invoked us.
1095: # $replyfd- File descriptor connected to the client
1096: # Implicit Inputs:
1097: # $currenthostid - Global variable that carries the name of the host
1098: # known as.
1.448 raeburn 1099: # $clientname - Global variable that carries the name of the host we're connected to.
1.216 foxr 1100: # Returns:
1101: # 1 - Ok to continue processing.
1102: # 0 - Program should exit.
1103: # Implicit Outputs:
1104: # Reply information is sent to the client.
1105: # $cipher is set with a reference to a new IDEA encryption object.
1106: #
1107: sub establish_key_handler {
1108: my ($cmd, $tail, $replyfd) = @_;
1109:
1110: my $buildkey=time.$$.int(rand 100000);
1111: $buildkey=~tr/1-6/A-F/;
1112: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1113: my $key=$currenthostid.$clientname;
1114: $key=~tr/a-z/A-Z/;
1115: $key=~tr/G-P/0-9/;
1116: $key=~tr/Q-Z/0-9/;
1117: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1118: $key=substr($key,0,32);
1119: my $cipherkey=pack("H32",$key);
1120: $cipher=new IDEA $cipherkey;
1.387 albertel 1121: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1.216 foxr 1122:
1123: return 1;
1124:
1125: }
1126: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1127:
1.217 foxr 1128: # Handler for the load command. Returns the current system load average
1129: # to the requestor.
1130: #
1131: # Parameters:
1132: # $cmd - the actual keyword that invoked us.
1133: # $tail - the tail of the request that invoked us.
1134: # $replyfd- File descriptor connected to the client
1135: # Implicit Inputs:
1136: # $currenthostid - Global variable that carries the name of the host
1137: # known as.
1.448 raeburn 1138: # $clientname - Global variable that carries the name of the host we're connected to.
1.217 foxr 1139: # Returns:
1140: # 1 - Ok to continue processing.
1141: # 0 - Program should exit.
1142: # Side effects:
1143: # Reply information is sent to the client.
1144: sub load_handler {
1145: my ($cmd, $tail, $replyfd) = @_;
1146:
1.463 foxr 1147:
1148:
1.217 foxr 1149: # Get the load average from /proc/loadavg and calculate it as a percentage of
1150: # the allowed load limit as set by the perl global variable lonLoadLim
1151:
1152: my $loadavg;
1153: my $loadfile=IO::File->new('/proc/loadavg');
1154:
1155: $loadavg=<$loadfile>;
1156: $loadavg =~ s/\s.*//g; # Extract the first field only.
1157:
1158: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1159:
1.387 albertel 1160: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1.217 foxr 1161:
1162: return 1;
1163: }
1.263 albertel 1164: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1165:
1166: #
1167: # Process the userload request. This sub returns to the client the current
1168: # user load average. It can be invoked either by clients or managers.
1169: #
1170: # Parameters:
1171: # $cmd - the actual keyword that invoked us.
1172: # $tail - the tail of the request that invoked us.
1173: # $replyfd- File descriptor connected to the client
1174: # Implicit Inputs:
1175: # $currenthostid - Global variable that carries the name of the host
1176: # known as.
1.448 raeburn 1177: # $clientname - Global variable that carries the name of the host we're connected to.
1.217 foxr 1178: # Returns:
1179: # 1 - Ok to continue processing.
1180: # 0 - Program should exit
1181: # Implicit inputs:
1182: # whatever the userload() function requires.
1183: # Implicit outputs:
1184: # the reply is written to the client.
1185: #
1186: sub user_load_handler {
1187: my ($cmd, $tail, $replyfd) = @_;
1188:
1.365 albertel 1189: my $userloadpercent=&Apache::lonnet::userload();
1.387 albertel 1190: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1.217 foxr 1191:
1192: return 1;
1193: }
1.263 albertel 1194: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1195:
1.218 foxr 1196: # Process a request for the authorization type of a user:
1197: # (userauth).
1198: #
1199: # Parameters:
1200: # $cmd - the actual keyword that invoked us.
1201: # $tail - the tail of the request that invoked us.
1202: # $replyfd- File descriptor connected to the client
1203: # Returns:
1204: # 1 - Ok to continue processing.
1205: # 0 - Program should exit
1206: # Implicit outputs:
1207: # The user authorization type is written to the client.
1208: #
1209: sub user_authorization_type {
1210: my ($cmd, $tail, $replyfd) = @_;
1211:
1212: my $userinput = "$cmd:$tail";
1213:
1214: # Pull the domain and username out of the command tail.
1.222 foxr 1215: # and call get_auth_type to determine the authentication type.
1.218 foxr 1216:
1217: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1218: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1219: if($result eq "nouser") {
1220: &Failure( $replyfd, "unknown_user\n", $userinput);
1221: } else {
1222: #
1.222 foxr 1223: # We only want to pass the second field from get_auth_type
1.218 foxr 1224: # for ^krb.. otherwise we'll be handing out the encrypted
1225: # password for internals e.g.
1226: #
1227: my ($type,$otherinfo) = split(/:/,$result);
1228: if($type =~ /^krb/) {
1229: $type = $result;
1.269 raeburn 1230: } else {
1231: $type .= ':';
1232: }
1.387 albertel 1233: &Reply( $replyfd, \$type, $userinput);
1.218 foxr 1234: }
1235:
1236: return 1;
1237: }
1238: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1239:
1240: # Process a request by a manager to push a hosts or domain table
1241: # to us. We pick apart the command and pass it on to the subs
1242: # that already exist to do this.
1243: #
1244: # Parameters:
1245: # $cmd - the actual keyword that invoked us.
1246: # $tail - the tail of the request that invoked us.
1247: # $client - File descriptor connected to the client
1248: # Returns:
1249: # 1 - Ok to continue processing.
1250: # 0 - Program should exit
1251: # Implicit Output:
1252: # a reply is written to the client.
1253: sub push_file_handler {
1254: my ($cmd, $tail, $client) = @_;
1.412 foxr 1255: &Debug("In push file handler");
1.218 foxr 1256: my $userinput = "$cmd:$tail";
1257:
1258: # At this time we only know that the IP of our partner is a valid manager
1259: # the code below is a hook to do further authentication (e.g. to resolve
1260: # spoofing).
1261:
1262: my $cert = &GetCertificate($userinput);
1.412 foxr 1263: if(&ValidManager($cert)) {
1264: &Debug("Valid manager: $client");
1.218 foxr 1265:
1266: # Now presumably we have the bona fides of both the peer host and the
1267: # process making the request.
1268:
1269: my $reply = &PushFile($userinput);
1.387 albertel 1270: &Reply($client, \$reply, $userinput);
1.218 foxr 1271:
1272: } else {
1.412 foxr 1273: &logthis("push_file_handler $client is not valid");
1.218 foxr 1274: &Failure( $client, "refused\n", $userinput);
1275: }
1.219 foxr 1276: return 1;
1.218 foxr 1277: }
1278: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1279:
1.399 raeburn 1280: # The du_handler routine should be considered obsolete and is retained
1281: # for communication with legacy servers. Please see the du2_handler.
1.243 banghart 1282: #
1.399 raeburn 1283: # du - list the disk usage of a directory recursively.
1.243 banghart 1284: #
1285: # note: stolen code from the ls file handler
1286: # under construction by Rick Banghart
1287: # .
1288: # Parameters:
1289: # $cmd - The command that dispatched us (du).
1290: # $ududir - The directory path to list... I'm not sure what this
1291: # is relative as things like ls:. return e.g.
1292: # no_such_dir.
1293: # $client - Socket open on the client.
1294: # Returns:
1295: # 1 - indicating that the daemon should not disconnect.
1296: # Side Effects:
1297: # The reply is written to $client.
1298: #
1299: sub du_handler {
1300: my ($cmd, $ududir, $client) = @_;
1.339 albertel 1301: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1.251 foxr 1302: my $userinput = "$cmd:$ududir";
1303:
1.245 albertel 1304: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1305: &Failure($client,"refused\n","$cmd:$ududir");
1306: return 1;
1307: }
1.249 foxr 1308: # Since $ududir could have some nasties in it,
1309: # we will require that ududir is a valid
1310: # directory. Just in case someone tries to
1311: # slip us a line like .;(cd /home/httpd rm -rf*)
1312: # etc.
1313: #
1314: if (-d $ududir) {
1.292 albertel 1315: my $total_size=0;
1316: my $code=sub {
1317: if ($_=~/\.\d+\./) { return;}
1318: if ($_=~/\.meta$/) { return;}
1.362 albertel 1319: if (-d $_) { return;}
1.292 albertel 1320: $total_size+=(stat($_))[7];
1321: };
1.295 raeburn 1322: chdir($ududir);
1.292 albertel 1323: find($code,$ududir);
1324: $total_size=int($total_size/1024);
1.387 albertel 1325: &Reply($client,\$total_size,"$cmd:$ududir");
1.249 foxr 1326: } else {
1.251 foxr 1327: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1.249 foxr 1328: }
1.243 banghart 1329: return 1;
1330: }
1331: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1332:
1.399 raeburn 1333: # Please also see the du_handler, which is obsoleted by du2.
1334: # du2_handler differs from du_handler in that required path to directory
1335: # provided by &propath() is prepended in the handler instead of on the
1336: # client side.
1.239 foxr 1337: #
1.399 raeburn 1338: # du2 - list the disk usage of a directory recursively.
1339: #
1340: # Parameters:
1341: # $cmd - The command that dispatched us (du).
1342: # $tail - The tail of the request that invoked us.
1343: # $tail is a : separated list of the following:
1344: # - $ududir - directory path to list (before prepending)
1345: # - $getpropath = 1 if &propath() should prepend
1346: # - $uname - username to use for &propath or user dir
1347: # - $udom - domain to use for &propath or user dir
1348: # All are escaped.
1349: # $client - Socket open on the client.
1350: # Returns:
1351: # 1 - indicating that the daemon should not disconnect.
1352: # Side Effects:
1353: # The reply is written to $client.
1354: #
1355:
1356: sub du2_handler {
1357: my ($cmd, $tail, $client) = @_;
1358: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1359: my $userinput = "$cmd:$tail";
1360: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1361: &Failure($client,"refused\n","$cmd:$tail");
1362: return 1;
1363: }
1364: if ($getpropath) {
1365: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1366: $ududir = &propath($udom,$uname).'/'.$ududir;
1367: } else {
1368: &Failure($client,"refused\n","$cmd:$tail");
1369: return 1;
1370: }
1371: }
1372: # Since $ududir could have some nasties in it,
1373: # we will require that ududir is a valid
1374: # directory. Just in case someone tries to
1375: # slip us a line like .;(cd /home/httpd rm -rf*)
1376: # etc.
1377: #
1378: if (-d $ududir) {
1379: my $total_size=0;
1380: my $code=sub {
1381: if ($_=~/\.\d+\./) { return;}
1382: if ($_=~/\.meta$/) { return;}
1383: if (-d $_) { return;}
1384: $total_size+=(stat($_))[7];
1385: };
1386: chdir($ududir);
1387: find($code,$ududir);
1388: $total_size=int($total_size/1024);
1389: &Reply($client,\$total_size,"$cmd:$ududir");
1390: } else {
1391: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1392: }
1393: return 1;
1394: }
1395: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1396:
1397: #
1398: # The ls_handler routine should be considered obsolete and is retained
1399: # for communication with legacy servers. Please see the ls3_handler.
1.280 matthew 1400: #
1.239 foxr 1401: # ls - list the contents of a directory. For each file in the
1402: # selected directory the filename followed by the full output of
1403: # the stat function is returned. The returned info for each
1404: # file are separated by ':'. The stat fields are separated by &'s.
1405: # Parameters:
1406: # $cmd - The command that dispatched us (ls).
1407: # $ulsdir - The directory path to list... I'm not sure what this
1408: # is relative as things like ls:. return e.g.
1409: # no_such_dir.
1410: # $client - Socket open on the client.
1411: # Returns:
1412: # 1 - indicating that the daemon should not disconnect.
1413: # Side Effects:
1414: # The reply is written to $client.
1415: #
1416: sub ls_handler {
1.280 matthew 1417: # obsoleted by ls2_handler
1.239 foxr 1418: my ($cmd, $ulsdir, $client) = @_;
1419:
1420: my $userinput = "$cmd:$ulsdir";
1421:
1422: my $obs;
1423: my $rights;
1424: my $ulsout='';
1425: my $ulsfn;
1426: if (-e $ulsdir) {
1427: if(-d $ulsdir) {
1428: if (opendir(LSDIR,$ulsdir)) {
1429: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1430: undef($obs);
1431: undef($rights);
1.239 foxr 1432: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1433: #We do some obsolete checking here
1434: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1435: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1436: my @obsolete=<FILE>;
1437: foreach my $obsolete (@obsolete) {
1.301 www 1438: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.239 foxr 1439: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1440: }
1441: }
1442: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1443: if($obs eq '1') { $ulsout.="&1"; }
1444: else { $ulsout.="&0"; }
1445: if($rights eq '1') { $ulsout.="&1:"; }
1446: else { $ulsout.="&0:"; }
1447: }
1448: closedir(LSDIR);
1449: }
1450: } else {
1451: my @ulsstats=stat($ulsdir);
1452: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1453: }
1454: } else {
1455: $ulsout='no_such_dir';
1456: }
1457: if ($ulsout eq '') { $ulsout='empty'; }
1.387 albertel 1458: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.239 foxr 1459:
1460: return 1;
1461:
1462: }
1463: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1464:
1.399 raeburn 1465: # The ls2_handler routine should be considered obsolete and is retained
1466: # for communication with legacy servers. Please see the ls3_handler.
1467: # Please also see the ls_handler, which was itself obsoleted by ls2.
1.280 matthew 1468: # ls2_handler differs from ls_handler in that it escapes its return
1469: # values before concatenating them together with ':'s.
1470: #
1471: # ls2 - list the contents of a directory. For each file in the
1472: # selected directory the filename followed by the full output of
1473: # the stat function is returned. The returned info for each
1474: # file are separated by ':'. The stat fields are separated by &'s.
1475: # Parameters:
1476: # $cmd - The command that dispatched us (ls).
1477: # $ulsdir - The directory path to list... I'm not sure what this
1478: # is relative as things like ls:. return e.g.
1479: # no_such_dir.
1480: # $client - Socket open on the client.
1481: # Returns:
1482: # 1 - indicating that the daemon should not disconnect.
1483: # Side Effects:
1484: # The reply is written to $client.
1485: #
1486: sub ls2_handler {
1487: my ($cmd, $ulsdir, $client) = @_;
1488:
1489: my $userinput = "$cmd:$ulsdir";
1490:
1491: my $obs;
1492: my $rights;
1493: my $ulsout='';
1494: my $ulsfn;
1495: if (-e $ulsdir) {
1496: if(-d $ulsdir) {
1497: if (opendir(LSDIR,$ulsdir)) {
1498: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1499: undef($obs);
1500: undef($rights);
1.280 matthew 1501: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1502: #We do some obsolete checking here
1503: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1504: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1505: my @obsolete=<FILE>;
1506: foreach my $obsolete (@obsolete) {
1.301 www 1507: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.280 matthew 1508: if($obsolete =~ m|(<copyright>)(default)|) {
1509: $rights = 1;
1510: }
1511: }
1512: }
1513: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1514: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1515: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1516: $ulsout.= &escape($tmp).':';
1517: }
1518: closedir(LSDIR);
1519: }
1520: } else {
1521: my @ulsstats=stat($ulsdir);
1522: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1523: }
1524: } else {
1525: $ulsout='no_such_dir';
1526: }
1527: if ($ulsout eq '') { $ulsout='empty'; }
1.387 albertel 1528: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.280 matthew 1529: return 1;
1530: }
1531: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1.399 raeburn 1532: #
1533: # ls3 - list the contents of a directory. For each file in the
1534: # selected directory the filename followed by the full output of
1535: # the stat function is returned. The returned info for each
1536: # file are separated by ':'. The stat fields are separated by &'s.
1537: # Parameters:
1538: # $cmd - The command that dispatched us (ls).
1539: # $tail - The tail of the request that invoked us.
1540: # $tail is a : separated list of the following:
1541: # - $ulsdir - directory path to list (before prepending)
1542: # - $getpropath = 1 if &propath() should prepend
1543: # - $getuserdir = 1 if path to user dir in lonUsers should
1544: # prepend
1545: # - $alternate_root - path to prepend
1546: # - $uname - username to use for &propath or user dir
1547: # - $udom - domain to use for &propath or user dir
1548: # All of these except $getpropath and &getuserdir are escaped.
1549: # no_such_dir.
1550: # $client - Socket open on the client.
1551: # Returns:
1552: # 1 - indicating that the daemon should not disconnect.
1553: # Side Effects:
1554: # The reply is written to $client.
1555: #
1556:
1557: sub ls3_handler {
1558: my ($cmd, $tail, $client) = @_;
1559: my $userinput = "$cmd:$tail";
1560: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1561: split(/:/,$tail);
1562: if (defined($ulsdir)) {
1563: $ulsdir = &unescape($ulsdir);
1564: }
1565: if (defined($alternate_root)) {
1566: $alternate_root = &unescape($alternate_root);
1567: }
1568: if (defined($uname)) {
1569: $uname = &unescape($uname);
1570: }
1571: if (defined($udom)) {
1572: $udom = &unescape($udom);
1573: }
1574:
1575: my $dir_root = $perlvar{'lonDocRoot'};
1576: if ($getpropath) {
1577: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1578: $dir_root = &propath($udom,$uname);
1579: $dir_root =~ s/\/$//;
1580: } else {
1581: &Failure($client,"refused\n","$cmd:$tail");
1582: return 1;
1583: }
1584: } elsif ($getuserdir) {
1585: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1586: my $subdir=$uname.'__';
1587: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1588: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1589: ."/$udom/$subdir/$uname";
1590: } else {
1591: &Failure($client,"refused\n","$cmd:$tail");
1592: return 1;
1593: }
1.400 raeburn 1594: } elsif ($alternate_root ne '') {
1.399 raeburn 1595: $dir_root = $alternate_root;
1596: }
1.408 raeburn 1597: if (($dir_root ne '') && ($dir_root ne '/')) {
1.400 raeburn 1598: if ($ulsdir =~ /^\//) {
1599: $ulsdir = $dir_root.$ulsdir;
1600: } else {
1601: $ulsdir = $dir_root.'/'.$ulsdir;
1602: }
1.399 raeburn 1603: }
1604: my $obs;
1605: my $rights;
1606: my $ulsout='';
1607: my $ulsfn;
1608: if (-e $ulsdir) {
1609: if(-d $ulsdir) {
1610: if (opendir(LSDIR,$ulsdir)) {
1611: while ($ulsfn=readdir(LSDIR)) {
1612: undef($obs);
1613: undef($rights);
1614: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1615: #We do some obsolete checking here
1616: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1617: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1618: my @obsolete=<FILE>;
1619: foreach my $obsolete (@obsolete) {
1620: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1621: if($obsolete =~ m|(<copyright>)(default)|) {
1622: $rights = 1;
1623: }
1624: }
1625: }
1626: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1627: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1628: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1629: $ulsout.= &escape($tmp).':';
1630: }
1631: closedir(LSDIR);
1632: }
1633: } else {
1634: my @ulsstats=stat($ulsdir);
1635: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1636: }
1637: } else {
1638: $ulsout='no_such_dir';
1.400 raeburn 1639: }
1640: if ($ulsout eq '') { $ulsout='empty'; }
1641: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1642: return 1;
1.399 raeburn 1643: }
1644: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1.280 matthew 1645:
1.477 raeburn 1646: sub read_lonnet_global {
1647: my ($cmd,$tail,$client) = @_;
1648: my $userinput = "$cmd:$tail";
1649: my $requested = &Apache::lonnet::thaw_unescape($tail);
1650: my $result;
1.480 raeburn 1651: my %packagevars = (
1652: spareid => \%Apache::lonnet::spareid,
1653: perlvar => \%Apache::lonnet::perlvar,
1654: );
1655: my %limit_to = (
1656: perlvar => {
1657: lonOtherAuthen => 1,
1658: lonBalancer => 1,
1659: lonVersion => 1,
1660: lonSysEMail => 1,
1661: lonHostID => 1,
1662: lonRole => 1,
1663: lonDefDomain => 1,
1664: lonLoadLim => 1,
1665: lonUserLoadLim => 1,
1666: }
1667: );
1.477 raeburn 1668: if (ref($requested) eq 'HASH') {
1669: foreach my $what (keys(%{$requested})) {
1670: my $response;
1.480 raeburn 1671: my $items = {};
1672: if (exists($packagevars{$what})) {
1673: if (ref($limit_to{$what}) eq 'HASH') {
1674: foreach my $varname (keys(%{$packagevars{$what}})) {
1675: if ($limit_to{$what}{$varname}) {
1676: $items->{$varname} = $packagevars{$what}{$varname};
1677: }
1678: }
1679: } else {
1680: $items = $packagevars{$what};
1.477 raeburn 1681: }
1.480 raeburn 1682: if ($what eq 'perlvar') {
1683: if (!exists($packagevars{$what}{'lonBalancer'})) {
1684: if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
1685: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
1686: if (ref($othervarref) eq 'HASH') {
1687: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
1688: }
1689: }
1690: }
1.477 raeburn 1691: }
1.480 raeburn 1692: $response = &Apache::lonnet::freeze_escape($items);
1.477 raeburn 1693: }
1.478 raeburn 1694: $result .= &escape($what).'='.$response.'&';
1.477 raeburn 1695: }
1696: }
1697: $result =~ s/\&$//;
1698: &Reply($client,\$result,$userinput);
1699: return 1;
1700: }
1701: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
1702:
1.479 raeburn 1703: sub server_devalidatecache_handler {
1704: my ($cmd,$tail,$client) = @_;
1705: my $userinput = "$cmd:$tail";
1706: my ($name,$id) = map { &unescape($_); } split(/:/,$tail);
1707: &Apache::lonnet::devalidate_cache_new($name,$id);
1708: my $result = 'ok';
1709: &Reply($client,\$result,$userinput);
1710: return 1;
1711: }
1.481 raeburn 1712: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1.479 raeburn 1713:
1.410 raeburn 1714: sub server_timezone_handler {
1715: my ($cmd,$tail,$client) = @_;
1716: my $userinput = "$cmd:$tail";
1717: my $timezone;
1718: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1719: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1720: if (-e $clockfile) {
1721: if (open(my $fh,"<$clockfile")) {
1722: while (<$fh>) {
1723: next if (/^[\#\s]/);
1724: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1725: $timezone = $1;
1726: last;
1727: }
1728: }
1729: close($fh);
1730: }
1731: } elsif (-e $tzfile) {
1732: if (open(my $fh,"<$tzfile")) {
1733: $timezone = <$fh>;
1734: close($fh);
1735: chomp($timezone);
1736: if ($timezone =~ m{^Etc/(\w+)$}) {
1737: $timezone = $1;
1738: }
1739: }
1740: }
1741: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1742: return 1;
1743: }
1744: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1745:
1.413 raeburn 1746: sub server_loncaparev_handler {
1747: my ($cmd,$tail,$client) = @_;
1748: my $userinput = "$cmd:$tail";
1749: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1750: return 1;
1751: }
1752: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1753:
1.448 raeburn 1754: sub server_homeID_handler {
1755: my ($cmd,$tail,$client) = @_;
1756: my $userinput = "$cmd:$tail";
1757: &Reply($client,\$perlvar{'lonHostID'},$userinput);
1758: return 1;
1759: }
1760: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
1761:
1.471 raeburn 1762: sub server_distarch_handler {
1763: my ($cmd,$tail,$client) = @_;
1764: my $userinput = "$cmd:$tail";
1765: my $reply = &distro_and_arch();
1766: &Reply($client,\$reply,$userinput);
1767: return 1;
1768: }
1769: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
1770:
1.218 foxr 1771: # Process a reinit request. Reinit requests that either
1772: # lonc or lond be reinitialized so that an updated
1773: # host.tab or domain.tab can be processed.
1774: #
1775: # Parameters:
1776: # $cmd - the actual keyword that invoked us.
1777: # $tail - the tail of the request that invoked us.
1778: # $client - File descriptor connected to the client
1779: # Returns:
1780: # 1 - Ok to continue processing.
1781: # 0 - Program should exit
1782: # Implicit output:
1783: # a reply is sent to the client.
1784: #
1785: sub reinit_process_handler {
1786: my ($cmd, $tail, $client) = @_;
1787:
1788: my $userinput = "$cmd:$tail";
1789:
1790: my $cert = &GetCertificate($userinput);
1791: if(&ValidManager($cert)) {
1792: chomp($userinput);
1793: my $reply = &ReinitProcess($userinput);
1.387 albertel 1794: &Reply( $client, \$reply, $userinput);
1.218 foxr 1795: } else {
1796: &Failure( $client, "refused\n", $userinput);
1797: }
1798: return 1;
1799: }
1800: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1801:
1802: # Process the editing script for a table edit operation.
1803: # the editing operation must be encrypted and requested by
1804: # a manager host.
1805: #
1806: # Parameters:
1807: # $cmd - the actual keyword that invoked us.
1808: # $tail - the tail of the request that invoked us.
1809: # $client - File descriptor connected to the client
1810: # Returns:
1811: # 1 - Ok to continue processing.
1812: # 0 - Program should exit
1813: # Implicit output:
1814: # a reply is sent to the client.
1815: #
1816: sub edit_table_handler {
1817: my ($command, $tail, $client) = @_;
1818:
1819: my $userinput = "$command:$tail";
1820:
1821: my $cert = &GetCertificate($userinput);
1822: if(&ValidManager($cert)) {
1823: my($filetype, $script) = split(/:/, $tail);
1824: if (($filetype eq "hosts") ||
1825: ($filetype eq "domain")) {
1826: if($script ne "") {
1827: &Reply($client, # BUGBUG - EditFile
1828: &EditFile($userinput), # could fail.
1829: $userinput);
1830: } else {
1831: &Failure($client,"refused\n",$userinput);
1832: }
1833: } else {
1834: &Failure($client,"refused\n",$userinput);
1835: }
1836: } else {
1837: &Failure($client,"refused\n",$userinput);
1838: }
1839: return 1;
1840: }
1.263 albertel 1841: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1842:
1.220 foxr 1843: #
1844: # Authenticate a user against the LonCAPA authentication
1845: # database. Note that there are several authentication
1846: # possibilities:
1847: # - unix - The user can be authenticated against the unix
1848: # password file.
1849: # - internal - The user can be authenticated against a purely
1850: # internal per user password file.
1851: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1852: # ticket granting authority.
1853: # - user - The person tailoring LonCAPA can supply a user authentication
1854: # mechanism that is per system.
1855: #
1856: # Parameters:
1857: # $cmd - The command that got us here.
1858: # $tail - Tail of the command (remaining parameters).
1859: # $client - File descriptor connected to client.
1860: # Returns
1861: # 0 - Requested to exit, caller should shut down.
1862: # 1 - Continue processing.
1863: # Implicit inputs:
1864: # The authentication systems describe above have their own forms of implicit
1865: # input into the authentication process that are described above.
1866: #
1867: sub authenticate_handler {
1868: my ($cmd, $tail, $client) = @_;
1869:
1870:
1871: # Regenerate the full input line
1872:
1873: my $userinput = $cmd.":".$tail;
1874:
1875: # udom - User's domain.
1876: # uname - Username.
1877: # upass - User's password.
1.396 raeburn 1878: # checkdefauth - Pass to validate_user() to try authentication
1879: # with default auth type(s) if no user account.
1.447 raeburn 1880: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
1881: # to check if session can be hosted.
1.220 foxr 1882:
1.447 raeburn 1883: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
1.399 raeburn 1884: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
1.220 foxr 1885: chomp($upass);
1886: $upass=&unescape($upass);
1887:
1.396 raeburn 1888: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1.220 foxr 1889: if($pwdcorrect) {
1.447 raeburn 1890: my $canhost = 1;
1891: unless ($clientcancheckhost) {
1.448 raeburn 1892: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
1893: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1.452 raeburn 1894: my @intdoms;
1895: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
1896: if (ref($internet_names) eq 'ARRAY') {
1897: @intdoms = @{$internet_names};
1898: }
1.448 raeburn 1899: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1.447 raeburn 1900: my ($remote,$hosted);
1901: my $remotesession = &get_usersession_config($udom,'remotesession');
1902: if (ref($remotesession) eq 'HASH') {
1903: $remote = $remotesession->{'remote'}
1904: }
1.448 raeburn 1905: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
1.447 raeburn 1906: if (ref($hostedsession) eq 'HASH') {
1907: $hosted = $hostedsession->{'hosted'};
1908: }
1.449 raeburn 1909: my $loncaparev = $clientversion;
1910: if ($loncaparev eq '') {
1911: $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
1912: }
1.448 raeburn 1913: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
1.449 raeburn 1914: $loncaparev,
1.447 raeburn 1915: $remote,$hosted);
1916: }
1917: }
1918: if ($canhost) {
1919: &Reply( $client, "authorized\n", $userinput);
1920: } else {
1921: &Reply( $client, "not_allowed_to_host\n", $userinput);
1922: }
1.220 foxr 1923: #
1924: # Bad credentials: Failed to authorize
1925: #
1926: } else {
1927: &Failure( $client, "non_authorized\n", $userinput);
1928: }
1929:
1930: return 1;
1931: }
1.263 albertel 1932: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1933:
1.222 foxr 1934: #
1935: # Change a user's password. Note that this function is complicated by
1936: # the fact that a user may be authenticated in more than one way:
1937: # At present, we are not able to change the password for all types of
1938: # authentication methods. Only for:
1939: # unix - unix password or shadow passoword style authentication.
1940: # local - Locally written authentication mechanism.
1941: # For now, kerb4 and kerb5 password changes are not supported and result
1942: # in an error.
1943: # FUTURE WORK:
1944: # Support kerberos passwd changes?
1945: # Parameters:
1946: # $cmd - The command that got us here.
1947: # $tail - Tail of the command (remaining parameters).
1948: # $client - File descriptor connected to client.
1949: # Returns
1950: # 0 - Requested to exit, caller should shut down.
1951: # 1 - Continue processing.
1952: # Implicit inputs:
1953: # The authentication systems describe above have their own forms of implicit
1954: # input into the authentication process that are described above.
1955: sub change_password_handler {
1956: my ($cmd, $tail, $client) = @_;
1957:
1958: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1959:
1960: #
1961: # udom - user's domain.
1962: # uname - Username.
1963: # upass - Current password.
1964: # npass - New password.
1.346 raeburn 1965: # context - Context in which this was called
1966: # (preferences or reset_by_email).
1.428 raeburn 1967: # lonhost - HostID of server where request originated
1.222 foxr 1968:
1.428 raeburn 1969: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1.222 foxr 1970:
1971: $upass=&unescape($upass);
1972: $npass=&unescape($npass);
1973: &Debug("Trying to change password for $uname");
1974:
1975: # First require that the user can be authenticated with their
1.346 raeburn 1976: # old password unless context was 'reset_by_email':
1977:
1.428 raeburn 1978: my ($validated,$failure);
1.346 raeburn 1979: if ($context eq 'reset_by_email') {
1.428 raeburn 1980: if ($lonhost eq '') {
1981: $failure = 'invalid_client';
1982: } else {
1983: $validated = 1;
1984: }
1.346 raeburn 1985: } else {
1986: $validated = &validate_user($udom, $uname, $upass);
1987: }
1.222 foxr 1988: if($validated) {
1989: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1990:
1991: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1992: if ($howpwd eq 'internal') {
1993: &Debug("internal auth");
1994: my $salt=time;
1995: $salt=substr($salt,6,2);
1996: my $ncpass=crypt($npass,$salt);
1997: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1.428 raeburn 1998: my $msg="Result of password change for $uname: pwchange_success";
1999: if ($lonhost) {
2000: $msg .= " - request originated from: $lonhost";
2001: }
2002: &logthis($msg);
1.222 foxr 2003: &Reply($client, "ok\n", $userinput);
2004: } else {
2005: &logthis("Unable to open $uname passwd "
2006: ."to change password");
2007: &Failure( $client, "non_authorized\n",$userinput);
2008: }
1.346 raeburn 2009: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1.287 foxr 2010: my $result = &change_unix_password($uname, $npass);
1.222 foxr 2011: &logthis("Result of password change for $uname: ".
1.287 foxr 2012: $result);
1.387 albertel 2013: &Reply($client, \$result, $userinput);
1.222 foxr 2014: } else {
2015: # this just means that the current password mode is not
2016: # one we know how to change (e.g the kerberos auth modes or
2017: # locally written auth handler).
2018: #
2019: &Failure( $client, "auth_mode_error\n", $userinput);
2020: }
2021:
1.224 foxr 2022: } else {
1.428 raeburn 2023: if ($failure eq '') {
2024: $failure = 'non_authorized';
2025: }
2026: &Failure( $client, "$failure\n", $userinput);
1.222 foxr 2027: }
2028:
2029: return 1;
2030: }
1.263 albertel 2031: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 2032:
1.225 foxr 2033: #
2034: # Create a new user. User in this case means a lon-capa user.
2035: # The user must either already exist in some authentication realm
2036: # like kerberos or the /etc/passwd. If not, a user completely local to
2037: # this loncapa system is created.
2038: #
2039: # Parameters:
2040: # $cmd - The command that got us here.
2041: # $tail - Tail of the command (remaining parameters).
2042: # $client - File descriptor connected to client.
2043: # Returns
2044: # 0 - Requested to exit, caller should shut down.
2045: # 1 - Continue processing.
2046: # Implicit inputs:
2047: # The authentication systems describe above have their own forms of implicit
2048: # input into the authentication process that are described above.
2049: sub add_user_handler {
2050:
2051: my ($cmd, $tail, $client) = @_;
2052:
2053:
2054: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2055: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2056:
2057: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2058:
2059:
2060: if($udom eq $currentdomainid) { # Reject new users for other domains...
2061:
2062: my $oldumask=umask(0077);
2063: chomp($npass);
2064: $npass=&unescape($npass);
2065: my $passfilename = &password_path($udom, $uname);
2066: &Debug("Password file created will be:".$passfilename);
2067: if (-e $passfilename) {
2068: &Failure( $client, "already_exists\n", $userinput);
2069: } else {
2070: my $fperror='';
1.264 albertel 2071: if (!&mkpath($passfilename)) {
2072: $fperror="error: ".($!+0)." mkdir failed while attempting "
2073: ."makeuser";
1.225 foxr 2074: }
2075: unless ($fperror) {
1.483 www 2076: my $result=&make_passwd_file($uname,$udom,$umode,$npass, $passfilename);
1.390 raeburn 2077: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
1.225 foxr 2078: } else {
1.387 albertel 2079: &Failure($client, \$fperror, $userinput);
1.225 foxr 2080: }
2081: }
2082: umask($oldumask);
2083: } else {
2084: &Failure($client, "not_right_domain\n",
2085: $userinput); # Even if we are multihomed.
2086:
2087: }
2088: return 1;
2089:
2090: }
2091: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2092:
2093: #
2094: # Change the authentication method of a user. Note that this may
2095: # also implicitly change the user's password if, for example, the user is
2096: # joining an existing authentication realm. Known authentication realms at
2097: # this time are:
2098: # internal - Purely internal password file (only loncapa knows this user)
2099: # local - Institutionally written authentication module.
2100: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2101: # kerb4 - kerberos version 4
2102: # kerb5 - kerberos version 5
2103: #
2104: # Parameters:
2105: # $cmd - The command that got us here.
2106: # $tail - Tail of the command (remaining parameters).
2107: # $client - File descriptor connected to client.
2108: # Returns
2109: # 0 - Requested to exit, caller should shut down.
2110: # 1 - Continue processing.
2111: # Implicit inputs:
2112: # The authentication systems describe above have their own forms of implicit
2113: # input into the authentication process that are described above.
1.287 foxr 2114: # NOTE:
2115: # This is also used to change the authentication credential values (e.g. passwd).
2116: #
1.225 foxr 2117: #
2118: sub change_authentication_handler {
2119:
2120: my ($cmd, $tail, $client) = @_;
2121:
2122: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2123:
2124: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2125: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2126: if ($udom ne $currentdomainid) {
2127: &Failure( $client, "not_right_domain\n", $client);
2128: } else {
2129:
2130: chomp($npass);
2131:
2132: $npass=&unescape($npass);
1.261 foxr 2133: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 2134: my $passfilename = &password_path($udom, $uname);
2135: if ($passfilename) { # Not allowed to create a new user!!
1.287 foxr 2136: # If just changing the unix passwd. need to arrange to run
2137: # passwd since otherwise make_passwd_file will run
2138: # lcuseradd which fails if an account already exists
2139: # (to prevent an unscrupulous LONCAPA admin from stealing
2140: # an existing account by overwriting it as a LonCAPA account).
2141:
2142: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2143: my $result = &change_unix_password($uname, $npass);
2144: &logthis("Result of password change for $uname: ".$result);
2145: if ($result eq "ok") {
1.390 raeburn 2146: &Reply($client, \$result);
1.288 albertel 2147: } else {
1.387 albertel 2148: &Failure($client, \$result);
1.287 foxr 2149: }
1.288 albertel 2150: } else {
1.483 www 2151: my $result=&make_passwd_file($uname,$udom,$umode,$npass,$passfilename);
1.287 foxr 2152: #
2153: # If the current auth mode is internal, and the old auth mode was
2154: # unix, or krb*, and the user is an author for this domain,
2155: # re-run manage_permissions for that role in order to be able
2156: # to take ownership of the construction space back to www:www
2157: #
2158:
2159:
2160: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
2161: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
2162: if(&is_author($udom, $uname)) {
2163: &Debug(" Need to manage author permissions...");
2164: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
2165: }
1.261 foxr 2166: }
1.387 albertel 2167: &Reply($client, \$result, $userinput);
1.261 foxr 2168: }
2169:
2170:
1.225 foxr 2171: } else {
1.251 foxr 2172: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 2173: }
2174: }
2175: return 1;
2176: }
2177: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2178:
2179: #
2180: # Determines if this is the home server for a user. The home server
2181: # for a user will have his/her lon-capa passwd file. Therefore all we need
2182: # to do is determine if this file exists.
2183: #
2184: # Parameters:
2185: # $cmd - The command that got us here.
2186: # $tail - Tail of the command (remaining parameters).
2187: # $client - File descriptor connected to client.
2188: # Returns
2189: # 0 - Requested to exit, caller should shut down.
2190: # 1 - Continue processing.
2191: # Implicit inputs:
2192: # The authentication systems describe above have their own forms of implicit
2193: # input into the authentication process that are described above.
2194: #
2195: sub is_home_handler {
2196: my ($cmd, $tail, $client) = @_;
2197:
2198: my $userinput = "$cmd:$tail";
2199:
2200: my ($udom,$uname)=split(/:/,$tail);
2201: chomp($uname);
2202: my $passfile = &password_filename($udom, $uname);
2203: if($passfile) {
2204: &Reply( $client, "found\n", $userinput);
2205: } else {
2206: &Failure($client, "not_found\n", $userinput);
2207: }
2208: return 1;
2209: }
2210: ®ister_handler("home", \&is_home_handler, 0,1,0);
2211:
2212: #
1.434 www 2213: # Process an update request for a resource.
2214: # A resource has been modified that we hold a subscription to.
1.225 foxr 2215: # If the resource is not local, then we must update, or at least invalidate our
2216: # cached copy of the resource.
2217: # Parameters:
2218: # $cmd - The command that got us here.
2219: # $tail - Tail of the command (remaining parameters).
2220: # $client - File descriptor connected to client.
2221: # Returns
2222: # 0 - Requested to exit, caller should shut down.
2223: # 1 - Continue processing.
2224: # Implicit inputs:
2225: # The authentication systems describe above have their own forms of implicit
2226: # input into the authentication process that are described above.
2227: #
2228: sub update_resource_handler {
2229:
2230: my ($cmd, $tail, $client) = @_;
2231:
2232: my $userinput = "$cmd:$tail";
2233:
2234: my $fname= $tail; # This allows interactive testing
2235:
2236:
2237: my $ownership=ishome($fname);
2238: if ($ownership eq 'not_owner') {
2239: if (-e $fname) {
1.434 www 2240: # Delete preview file, if exists
2241: unlink("$fname.tmp");
2242: # Get usage stats
1.225 foxr 2243: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2244: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2245: my $now=time;
2246: my $since=$now-$atime;
1.434 www 2247: # If the file has not been used within lonExpire seconds,
2248: # unsubscribe from it and delete local copy
1.225 foxr 2249: if ($since>$perlvar{'lonExpire'}) {
1.365 albertel 2250: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
1.308 albertel 2251: &devalidate_meta_cache($fname);
1.225 foxr 2252: unlink("$fname");
1.334 albertel 2253: unlink("$fname.meta");
1.225 foxr 2254: } else {
1.434 www 2255: # Yes, this is in active use. Get a fresh copy. Since it might be in
2256: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
1.225 foxr 2257: my $transname="$fname.in.transfer";
1.365 albertel 2258: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
1.225 foxr 2259: my $response;
1.455 www 2260: # FIXME: cannot replicate files that take more than two minutes to transfer?
2261: # alarm(120);
2262: # FIXME: this should use the LWP mechanism, not internal alarms.
2263: alarm(1200);
1.225 foxr 2264: {
2265: my $ua=new LWP::UserAgent;
2266: my $request=new HTTP::Request('GET',"$remoteurl");
2267: $response=$ua->request($request,$transname);
2268: }
2269: alarm(0);
2270: if ($response->is_error()) {
1.455 www 2271: # FIXME: we should probably clean up here instead of just whine
1.225 foxr 2272: unlink($transname);
2273: my $message=$response->status_line;
2274: &logthis("LWP GET: $message for $fname ($remoteurl)");
2275: } else {
2276: if ($remoteurl!~/\.meta$/) {
1.455 www 2277: # FIXME: isn't there an internal LWP mechanism for this?
1.225 foxr 2278: alarm(120);
2279: {
2280: my $ua=new LWP::UserAgent;
2281: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2282: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2283: if ($mresponse->is_error()) {
2284: unlink($fname.'.meta');
2285: }
2286: }
2287: alarm(0);
2288: }
1.434 www 2289: # we successfully transfered, copy file over to real name
1.225 foxr 2290: rename($transname,$fname);
1.308 albertel 2291: &devalidate_meta_cache($fname);
1.225 foxr 2292: }
2293: }
2294: &Reply( $client, "ok\n", $userinput);
2295: } else {
2296: &Failure($client, "not_found\n", $userinput);
2297: }
2298: } else {
2299: &Failure($client, "rejected\n", $userinput);
2300: }
2301: return 1;
2302: }
2303: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2304:
1.308 albertel 2305: sub devalidate_meta_cache {
2306: my ($url) = @_;
2307: use Cache::Memcached;
2308: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1.365 albertel 2309: $url = &Apache::lonnet::declutter($url);
1.308 albertel 2310: $url =~ s-\.meta$--;
2311: my $id = &escape('meta:'.$url);
2312: $memcache->delete($id);
2313: }
2314:
1.225 foxr 2315: #
1.226 foxr 2316: # Fetch a user file from a remote server to the user's home directory
2317: # userfiles subdir.
1.225 foxr 2318: # Parameters:
2319: # $cmd - The command that got us here.
2320: # $tail - Tail of the command (remaining parameters).
2321: # $client - File descriptor connected to client.
2322: # Returns
2323: # 0 - Requested to exit, caller should shut down.
2324: # 1 - Continue processing.
2325: #
2326: sub fetch_user_file_handler {
2327:
2328: my ($cmd, $tail, $client) = @_;
2329:
2330: my $userinput = "$cmd:$tail";
2331: my $fname = $tail;
1.232 foxr 2332: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 2333: my $udir=&propath($udom,$uname).'/userfiles';
2334: unless (-e $udir) {
2335: mkdir($udir,0770);
2336: }
1.232 foxr 2337: Debug("fetch user file for $fname");
1.225 foxr 2338: if (-e $udir) {
2339: $ufile=~s/^[\.\~]+//;
1.232 foxr 2340:
2341: # IF necessary, create the path right down to the file.
2342: # Note that any regular files in the way of this path are
2343: # wiped out to deal with some earlier folly of mine.
2344:
1.267 raeburn 2345: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 2346: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 2347: }
2348:
1.225 foxr 2349: my $destname=$udir.'/'.$ufile;
2350: my $transname=$udir.'/'.$ufile.'.in.transit';
1.476 raeburn 2351: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2352: $clientprotocol = 'http' if ($clientprotocol ne 'https');
1.486 raeburn 2353: my $clienthost = &Apache::lonnet::hostname($clientname);
2354: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
1.225 foxr 2355: my $response;
1.232 foxr 2356: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 2357: alarm(120);
2358: {
2359: my $ua=new LWP::UserAgent;
2360: my $request=new HTTP::Request('GET',"$remoteurl");
2361: $response=$ua->request($request,$transname);
2362: }
2363: alarm(0);
2364: if ($response->is_error()) {
2365: unlink($transname);
2366: my $message=$response->status_line;
2367: &logthis("LWP GET: $message for $fname ($remoteurl)");
2368: &Failure($client, "failed\n", $userinput);
2369: } else {
1.232 foxr 2370: Debug("Renaming $transname to $destname");
1.225 foxr 2371: if (!rename($transname,$destname)) {
2372: &logthis("Unable to move $transname to $destname");
2373: unlink($transname);
2374: &Failure($client, "failed\n", $userinput);
2375: } else {
1.489.2.2 raeburn 2376: if ($fname =~ /^default.+\.(page|sequence)$/) {
2377: my ($major,$minor) = split(/\./,$clientversion);
2378: if (($major < 2) || ($major == 2 && $minor < 11)) {
2379: my $now = time;
2380: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2381: my $key = &escape('internal.contentchange');
2382: my $what = "$key=$now";
2383: my $hashref = &tie_user_hash($udom,$uname,'environment',
2384: &GDBM_WRCREAT(),"P",$what);
2385: if ($hashref) {
2386: $hashref->{$key}=$now;
2387: if (!&untie_user_hash($hashref)) {
2388: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2389: "when updating internal.contentchange");
2390: }
2391: }
2392: }
2393: }
1.225 foxr 2394: &Reply($client, "ok\n", $userinput);
2395: }
2396: }
2397: } else {
2398: &Failure($client, "not_home\n", $userinput);
2399: }
2400: return 1;
2401: }
2402: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2403:
1.226 foxr 2404: #
2405: # Remove a file from a user's home directory userfiles subdirectory.
2406: # Parameters:
2407: # cmd - the Lond request keyword that got us here.
2408: # tail - the part of the command past the keyword.
2409: # client- File descriptor connected with the client.
2410: #
2411: # Returns:
2412: # 1 - Continue processing.
2413: sub remove_user_file_handler {
2414: my ($cmd, $tail, $client) = @_;
2415:
2416: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2417:
2418: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2419: if ($ufile =~m|/\.\./|) {
2420: # any files paths with /../ in them refuse
2421: # to deal with
2422: &Failure($client, "refused\n", "$cmd:$tail");
2423: } else {
2424: my $udir = &propath($udom,$uname);
2425: if (-e $udir) {
2426: my $file=$udir.'/userfiles/'.$ufile;
2427: if (-e $file) {
1.253 foxr 2428: #
2429: # If the file is a regular file unlink is fine...
2430: # However it's possible the client wants a dir.
2431: # removed, in which case rmdir is more approprate:
2432: #
1.240 banghart 2433: if (-f $file){
1.241 albertel 2434: unlink($file);
2435: } elsif(-d $file) {
2436: rmdir($file);
1.240 banghart 2437: }
1.226 foxr 2438: if (-e $file) {
1.253 foxr 2439: # File is still there after we deleted it ?!?
2440:
1.226 foxr 2441: &Failure($client, "failed\n", "$cmd:$tail");
2442: } else {
2443: &Reply($client, "ok\n", "$cmd:$tail");
2444: }
2445: } else {
2446: &Failure($client, "not_found\n", "$cmd:$tail");
2447: }
2448: } else {
2449: &Failure($client, "not_home\n", "$cmd:$tail");
2450: }
2451: }
2452: return 1;
2453: }
2454: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2455:
1.236 albertel 2456: #
2457: # make a directory in a user's home directory userfiles subdirectory.
2458: # Parameters:
2459: # cmd - the Lond request keyword that got us here.
2460: # tail - the part of the command past the keyword.
2461: # client- File descriptor connected with the client.
2462: #
2463: # Returns:
2464: # 1 - Continue processing.
2465: sub mkdir_user_file_handler {
2466: my ($cmd, $tail, $client) = @_;
2467:
2468: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2469: $dir=&unescape($dir);
2470: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2471: if ($ufile =~m|/\.\./|) {
2472: # any files paths with /../ in them refuse
2473: # to deal with
2474: &Failure($client, "refused\n", "$cmd:$tail");
2475: } else {
2476: my $udir = &propath($udom,$uname);
2477: if (-e $udir) {
1.264 albertel 2478: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2479: if (!&mkpath($newdir)) {
2480: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2481: }
1.264 albertel 2482: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2483: } else {
2484: &Failure($client, "not_home\n", "$cmd:$tail");
2485: }
2486: }
2487: return 1;
2488: }
2489: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2490:
1.237 albertel 2491: #
2492: # rename a file in a user's home directory userfiles subdirectory.
2493: # Parameters:
2494: # cmd - the Lond request keyword that got us here.
2495: # tail - the part of the command past the keyword.
2496: # client- File descriptor connected with the client.
2497: #
2498: # Returns:
2499: # 1 - Continue processing.
2500: sub rename_user_file_handler {
2501: my ($cmd, $tail, $client) = @_;
2502:
2503: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2504: $old=&unescape($old);
2505: $new=&unescape($new);
2506: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2507: # any files paths with /../ in them refuse to deal with
2508: &Failure($client, "refused\n", "$cmd:$tail");
2509: } else {
2510: my $udir = &propath($udom,$uname);
2511: if (-e $udir) {
2512: my $oldfile=$udir.'/userfiles/'.$old;
2513: my $newfile=$udir.'/userfiles/'.$new;
2514: if (-e $newfile) {
2515: &Failure($client, "exists\n", "$cmd:$tail");
2516: } elsif (! -e $oldfile) {
2517: &Failure($client, "not_found\n", "$cmd:$tail");
2518: } else {
2519: if (!rename($oldfile,$newfile)) {
2520: &Failure($client, "failed\n", "$cmd:$tail");
2521: } else {
2522: &Reply($client, "ok\n", "$cmd:$tail");
2523: }
2524: }
2525: } else {
2526: &Failure($client, "not_home\n", "$cmd:$tail");
2527: }
2528: }
2529: return 1;
2530: }
2531: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2532:
1.227 foxr 2533: #
1.382 albertel 2534: # Checks if the specified user has an active session on the server
2535: # return ok if so, not_found if not
2536: #
2537: # Parameters:
2538: # cmd - The request keyword that dispatched to tus.
2539: # tail - The tail of the request (colon separated parameters).
2540: # client - Filehandle open on the client.
2541: # Return:
2542: # 1.
2543: sub user_has_session_handler {
2544: my ($cmd, $tail, $client) = @_;
2545:
2546: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2547:
2548: opendir(DIR,$perlvar{'lonIDsDir'});
2549: my $filename;
2550: while ($filename=readdir(DIR)) {
2551: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2552: }
2553: if ($filename) {
2554: &Reply($client, "ok\n", "$cmd:$tail");
2555: } else {
2556: &Failure($client, "not_found\n", "$cmd:$tail");
2557: }
2558: return 1;
2559:
2560: }
2561: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2562:
2563: #
1.263 albertel 2564: # Authenticate access to a user file by checking that the token the user's
2565: # passed also exists in their session file
1.227 foxr 2566: #
2567: # Parameters:
2568: # cmd - The request keyword that dispatched to tus.
2569: # tail - The tail of the request (colon separated parameters).
2570: # client - Filehandle open on the client.
2571: # Return:
2572: # 1.
2573: sub token_auth_user_file_handler {
2574: my ($cmd, $tail, $client) = @_;
2575:
2576: my ($fname, $session) = split(/:/, $tail);
2577:
2578: chomp($session);
1.393 raeburn 2579: my $reply="non_auth";
1.343 albertel 2580: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2581: if (open(ENVIN,"$file")) {
1.332 albertel 2582: flock(ENVIN,LOCK_SH);
1.343 albertel 2583: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2584: if (exists($disk_env{"userfile.$fname"})) {
1.393 raeburn 2585: $reply="ok";
1.343 albertel 2586: } else {
2587: foreach my $envname (keys(%disk_env)) {
2588: if ($envname=~ m|^userfile\.\Q$fname\E|) {
1.393 raeburn 2589: $reply="ok";
1.343 albertel 2590: last;
2591: }
2592: }
1.227 foxr 2593: }
1.343 albertel 2594: untie(%disk_env);
1.227 foxr 2595: close(ENVIN);
1.387 albertel 2596: &Reply($client, \$reply, "$cmd:$tail");
1.227 foxr 2597: } else {
2598: &Failure($client, "invalid_token\n", "$cmd:$tail");
2599: }
2600: return 1;
2601:
2602: }
2603: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2604:
2605: #
2606: # Unsubscribe from a resource.
2607: #
2608: # Parameters:
2609: # $cmd - The command that got us here.
2610: # $tail - Tail of the command (remaining parameters).
2611: # $client - File descriptor connected to client.
2612: # Returns
2613: # 0 - Requested to exit, caller should shut down.
2614: # 1 - Continue processing.
2615: #
2616: sub unsubscribe_handler {
2617: my ($cmd, $tail, $client) = @_;
2618:
2619: my $userinput= "$cmd:$tail";
2620:
2621: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2622:
2623: &Debug("Unsubscribing $fname");
2624: if (-e $fname) {
2625: &Debug("Exists");
2626: &Reply($client, &unsub($fname,$clientip), $userinput);
2627: } else {
2628: &Failure($client, "not_found\n", $userinput);
2629: }
2630: return 1;
2631: }
2632: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2633:
1.230 foxr 2634: # Subscribe to a resource
2635: #
2636: # Parameters:
2637: # $cmd - The command that got us here.
2638: # $tail - Tail of the command (remaining parameters).
2639: # $client - File descriptor connected to client.
2640: # Returns
2641: # 0 - Requested to exit, caller should shut down.
2642: # 1 - Continue processing.
2643: #
2644: sub subscribe_handler {
2645: my ($cmd, $tail, $client)= @_;
2646:
2647: my $userinput = "$cmd:$tail";
2648:
2649: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2650:
2651: return 1;
2652: }
2653: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2654:
2655: #
1.379 albertel 2656: # Determine the latest version of a resource (it looks for the highest
2657: # past version and then returns that +1)
1.230 foxr 2658: #
2659: # Parameters:
2660: # $cmd - The command that got us here.
2661: # $tail - Tail of the command (remaining parameters).
1.379 albertel 2662: # (Should consist of an absolute path to a file)
1.230 foxr 2663: # $client - File descriptor connected to client.
2664: # Returns
2665: # 0 - Requested to exit, caller should shut down.
2666: # 1 - Continue processing.
2667: #
2668: sub current_version_handler {
2669: my ($cmd, $tail, $client) = @_;
2670:
2671: my $userinput= "$cmd:$tail";
2672:
2673: my $fname = $tail;
2674: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2675: return 1;
2676:
2677: }
2678: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2679:
2680: # Make an entry in a user's activity log.
2681: #
2682: # Parameters:
2683: # $cmd - The command that got us here.
2684: # $tail - Tail of the command (remaining parameters).
2685: # $client - File descriptor connected to client.
2686: # Returns
2687: # 0 - Requested to exit, caller should shut down.
2688: # 1 - Continue processing.
2689: #
2690: sub activity_log_handler {
2691: my ($cmd, $tail, $client) = @_;
2692:
2693:
2694: my $userinput= "$cmd:$tail";
2695:
2696: my ($udom,$uname,$what)=split(/:/,$tail);
2697: chomp($what);
2698: my $proname=&propath($udom,$uname);
2699: my $now=time;
2700: my $hfh;
2701: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2702: print $hfh "$now:$clientname:$what\n";
2703: &Reply( $client, "ok\n", $userinput);
2704: } else {
2705: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2706: ."while attempting log\n",
2707: $userinput);
2708: }
2709:
2710: return 1;
2711: }
1.263 albertel 2712: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2713:
2714: #
2715: # Put a namespace entry in a user profile hash.
2716: # My druthers would be for this to be an encrypted interaction too.
2717: # anything that might be an inadvertent covert channel about either
2718: # user authentication or user personal information....
2719: #
2720: # Parameters:
2721: # $cmd - The command that got us here.
2722: # $tail - Tail of the command (remaining parameters).
2723: # $client - File descriptor connected to client.
2724: # Returns
2725: # 0 - Requested to exit, caller should shut down.
2726: # 1 - Continue processing.
2727: #
2728: sub put_user_profile_entry {
2729: my ($cmd, $tail, $client) = @_;
1.229 foxr 2730:
1.230 foxr 2731: my $userinput = "$cmd:$tail";
2732:
1.242 raeburn 2733: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2734: if ($namespace ne 'roles') {
2735: chomp($what);
2736: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2737: &GDBM_WRCREAT(),"P",$what);
2738: if($hashref) {
2739: my @pairs=split(/\&/,$what);
2740: foreach my $pair (@pairs) {
2741: my ($key,$value)=split(/=/,$pair);
2742: $hashref->{$key}=$value;
2743: }
1.311 albertel 2744: if (&untie_user_hash($hashref)) {
1.230 foxr 2745: &Reply( $client, "ok\n", $userinput);
2746: } else {
2747: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2748: "while attempting put\n",
2749: $userinput);
2750: }
2751: } else {
1.316 albertel 2752: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230 foxr 2753: "while attempting put\n", $userinput);
2754: }
2755: } else {
2756: &Failure( $client, "refused\n", $userinput);
2757: }
2758:
2759: return 1;
2760: }
2761: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2762:
1.283 albertel 2763: # Put a piece of new data in hash, returns error if entry already exists
2764: # Parameters:
2765: # $cmd - The command that got us here.
2766: # $tail - Tail of the command (remaining parameters).
2767: # $client - File descriptor connected to client.
2768: # Returns
2769: # 0 - Requested to exit, caller should shut down.
2770: # 1 - Continue processing.
2771: #
2772: sub newput_user_profile_entry {
2773: my ($cmd, $tail, $client) = @_;
2774:
2775: my $userinput = "$cmd:$tail";
2776:
2777: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2778: if ($namespace eq 'roles') {
2779: &Failure( $client, "refused\n", $userinput);
2780: return 1;
2781: }
2782:
2783: chomp($what);
2784:
2785: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2786: &GDBM_WRCREAT(),"N",$what);
2787: if(!$hashref) {
1.316 albertel 2788: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283 albertel 2789: "while attempting put\n", $userinput);
2790: return 1;
2791: }
2792:
2793: my @pairs=split(/\&/,$what);
2794: foreach my $pair (@pairs) {
2795: my ($key,$value)=split(/=/,$pair);
2796: if (exists($hashref->{$key})) {
2797: &Failure($client, "key_exists: ".$key."\n",$userinput);
2798: return 1;
2799: }
2800: }
2801:
2802: foreach my $pair (@pairs) {
2803: my ($key,$value)=split(/=/,$pair);
2804: $hashref->{$key}=$value;
2805: }
2806:
1.311 albertel 2807: if (&untie_user_hash($hashref)) {
1.283 albertel 2808: &Reply( $client, "ok\n", $userinput);
2809: } else {
2810: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2811: "while attempting put\n",
2812: $userinput);
2813: }
2814: return 1;
2815: }
2816: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2817:
1.230 foxr 2818: #
2819: # Increment a profile entry in the user history file.
2820: # The history contains keyword value pairs. In this case,
2821: # The value itself is a pair of numbers. The first, the current value
2822: # the second an increment that this function applies to the current
2823: # value.
2824: #
2825: # Parameters:
2826: # $cmd - The command that got us here.
2827: # $tail - Tail of the command (remaining parameters).
2828: # $client - File descriptor connected to client.
2829: # Returns
2830: # 0 - Requested to exit, caller should shut down.
2831: # 1 - Continue processing.
2832: #
2833: sub increment_user_value_handler {
2834: my ($cmd, $tail, $client) = @_;
2835:
2836: my $userinput = "$cmd:$tail";
2837:
2838: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2839: if ($namespace ne 'roles') {
2840: chomp($what);
2841: my $hashref = &tie_user_hash($udom, $uname,
2842: $namespace, &GDBM_WRCREAT(),
2843: "P",$what);
2844: if ($hashref) {
2845: my @pairs=split(/\&/,$what);
2846: foreach my $pair (@pairs) {
2847: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2848: $value = &unescape($value);
1.230 foxr 2849: # We could check that we have a number...
2850: if (! defined($value) || $value eq '') {
2851: $value = 1;
2852: }
2853: $hashref->{$key}+=$value;
1.284 raeburn 2854: if ($namespace eq 'nohist_resourcetracker') {
2855: if ($hashref->{$key} < 0) {
2856: $hashref->{$key} = 0;
2857: }
2858: }
1.230 foxr 2859: }
1.311 albertel 2860: if (&untie_user_hash($hashref)) {
1.230 foxr 2861: &Reply( $client, "ok\n", $userinput);
2862: } else {
2863: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2864: "while attempting inc\n", $userinput);
2865: }
2866: } else {
2867: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2868: "while attempting inc\n", $userinput);
2869: }
2870: } else {
2871: &Failure($client, "refused\n", $userinput);
2872: }
2873:
2874: return 1;
2875: }
2876: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2877:
2878: #
2879: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2880: # Each 'role' a user has implies a set of permissions. Adding a new role
2881: # for a person grants the permissions packaged with that role
2882: # to that user when the role is selected.
2883: #
2884: # Parameters:
2885: # $cmd - The command string (rolesput).
2886: # $tail - The remainder of the request line. For rolesput this
2887: # consists of a colon separated list that contains:
2888: # The domain and user that is granting the role (logged).
2889: # The domain and user that is getting the role.
2890: # The roles being granted as a set of & separated pairs.
2891: # each pair a key value pair.
2892: # $client - File descriptor connected to the client.
2893: # Returns:
2894: # 0 - If the daemon should exit
2895: # 1 - To continue processing.
2896: #
2897: #
2898: sub roles_put_handler {
2899: my ($cmd, $tail, $client) = @_;
2900:
2901: my $userinput = "$cmd:$tail";
2902:
2903: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2904:
2905:
2906: my $namespace='roles';
2907: chomp($what);
2908: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2909: &GDBM_WRCREAT(), "P",
2910: "$exedom:$exeuser:$what");
2911: #
2912: # Log the attempt to set a role. The {}'s here ensure that the file
2913: # handle is open for the minimal amount of time. Since the flush
2914: # is done on close this improves the chances the log will be an un-
2915: # corrupted ordered thing.
2916: if ($hashref) {
1.261 foxr 2917: my $pass_entry = &get_auth_type($udom, $uname);
2918: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2919: $auth_type = $auth_type.":";
1.230 foxr 2920: my @pairs=split(/\&/,$what);
2921: foreach my $pair (@pairs) {
2922: my ($key,$value)=split(/=/,$pair);
2923: &manage_permissions($key, $udom, $uname,
1.260 foxr 2924: $auth_type);
1.230 foxr 2925: $hashref->{$key}=$value;
2926: }
1.311 albertel 2927: if (&untie_user_hash($hashref)) {
1.230 foxr 2928: &Reply($client, "ok\n", $userinput);
2929: } else {
2930: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2931: "while attempting rolesput\n", $userinput);
2932: }
2933: } else {
2934: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2935: "while attempting rolesput\n", $userinput);
2936: }
2937: return 1;
2938: }
2939: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2940:
2941: #
1.231 foxr 2942: # Deletes (removes) a role for a user. This is equivalent to removing
2943: # a permissions package associated with the role from the user's profile.
2944: #
2945: # Parameters:
2946: # $cmd - The command (rolesdel)
2947: # $tail - The remainder of the request line. This consists
2948: # of:
2949: # The domain and user requesting the change (logged)
2950: # The domain and user being changed.
2951: # The roles being revoked. These are shipped to us
2952: # as a bunch of & separated role name keywords.
2953: # $client - The file handle open on the client.
2954: # Returns:
2955: # 1 - Continue processing
2956: # 0 - Exit.
2957: #
2958: sub roles_delete_handler {
2959: my ($cmd, $tail, $client) = @_;
2960:
2961: my $userinput = "$cmd:$tail";
2962:
2963: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2964: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2965: "what = ".$what);
2966: my $namespace='roles';
2967: chomp($what);
2968: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2969: &GDBM_WRCREAT(), "D",
2970: "$exedom:$exeuser:$what");
2971:
2972: if ($hashref) {
2973: my @rolekeys=split(/\&/,$what);
2974:
2975: foreach my $key (@rolekeys) {
2976: delete $hashref->{$key};
2977: }
1.315 albertel 2978: if (&untie_user_hash($hashref)) {
1.231 foxr 2979: &Reply($client, "ok\n", $userinput);
2980: } else {
2981: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2982: "while attempting rolesdel\n", $userinput);
2983: }
2984: } else {
2985: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2986: "while attempting rolesdel\n", $userinput);
2987: }
2988:
2989: return 1;
2990: }
2991: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2992:
2993: # Unencrypted get from a user's profile database. See
2994: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2995: # This function retrieves a keyed item from a specific named database in the
2996: # user's directory.
2997: #
2998: # Parameters:
2999: # $cmd - Command request keyword (get).
3000: # $tail - Tail of the command. This is a colon separated list
3001: # consisting of the domain and username that uniquely
3002: # identifies the profile,
3003: # The 'namespace' which selects the gdbm file to
3004: # do the lookup in,
3005: # & separated list of keys to lookup. Note that
3006: # the values are returned as an & separated list too.
3007: # $client - File descriptor open on the client.
3008: # Returns:
3009: # 1 - Continue processing.
3010: # 0 - Exit.
3011: #
3012: sub get_profile_entry {
3013: my ($cmd, $tail, $client) = @_;
3014:
3015: my $userinput= "$cmd:$tail";
3016:
3017: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3018: chomp($what);
1.255 foxr 3019:
1.390 raeburn 3020:
1.255 foxr 3021: my $replystring = read_profile($udom, $uname, $namespace, $what);
3022: my ($first) = split(/:/,$replystring);
3023: if($first ne "error") {
1.387 albertel 3024: &Reply($client, \$replystring, $userinput);
1.231 foxr 3025: } else {
1.255 foxr 3026: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 3027: }
3028: return 1;
1.255 foxr 3029:
3030:
1.231 foxr 3031: }
3032: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3033:
3034: #
3035: # Process the encrypted get request. Note that the request is sent
3036: # in clear, but the reply is encrypted. This is a small covert channel:
3037: # information about the sensitive keys is given to the snooper. Just not
3038: # information about the values of the sensitive key. Hmm if I wanted to
3039: # know these I'd snoop for the egets. Get the profile item names from them
3040: # and then issue a get for them since there's no enforcement of the
3041: # requirement of an encrypted get for particular profile items. If I
3042: # were re-doing this, I'd force the request to be encrypted as well as the
3043: # reply. I'd also just enforce encrypted transactions for all gets since
3044: # that would prevent any covert channel snooping.
3045: #
3046: # Parameters:
3047: # $cmd - Command keyword of request (eget).
3048: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
3049: # $client - File open on the client.
3050: # Returns:
3051: # 1 - Continue processing
3052: # 0 - server should exit.
3053: sub get_profile_entry_encrypted {
3054: my ($cmd, $tail, $client) = @_;
3055:
3056: my $userinput = "$cmd:$tail";
3057:
1.339 albertel 3058: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1.231 foxr 3059: chomp($what);
1.255 foxr 3060: my $qresult = read_profile($udom, $uname, $namespace, $what);
3061: my ($first) = split(/:/, $qresult);
3062: if($first ne "error") {
3063:
3064: if ($cipher) {
3065: my $cmdlength=length($qresult);
3066: $qresult.=" ";
3067: my $encqresult='';
3068: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3069: $encqresult.= unpack("H16",
3070: $cipher->encrypt(substr($qresult,
3071: $encidx,
3072: 8)));
3073: }
3074: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3075: } else {
1.231 foxr 3076: &Failure( $client, "error:no_key\n", $userinput);
3077: }
3078: } else {
1.255 foxr 3079: &Failure($client, "$qresult while attempting eget\n", $userinput);
3080:
1.231 foxr 3081: }
3082:
3083: return 1;
3084: }
1.255 foxr 3085: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 3086:
1.231 foxr 3087: #
3088: # Deletes a key in a user profile database.
3089: #
3090: # Parameters:
3091: # $cmd - Command keyword (del).
3092: # $tail - Command tail. IN this case a colon
3093: # separated list containing:
3094: # The domain and user that identifies uniquely
3095: # the identity of the user.
3096: # The profile namespace (name of the profile
3097: # database file).
3098: # & separated list of keywords to delete.
3099: # $client - File open on client socket.
3100: # Returns:
3101: # 1 - Continue processing
3102: # 0 - Exit server.
3103: #
3104: #
3105: sub delete_profile_entry {
3106: my ($cmd, $tail, $client) = @_;
3107:
3108: my $userinput = "cmd:$tail";
3109:
3110: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3111: chomp($what);
3112: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3113: &GDBM_WRCREAT(),
3114: "D",$what);
3115: if ($hashref) {
3116: my @keys=split(/\&/,$what);
3117: foreach my $key (@keys) {
3118: delete($hashref->{$key});
3119: }
1.315 albertel 3120: if (&untie_user_hash($hashref)) {
1.231 foxr 3121: &Reply($client, "ok\n", $userinput);
3122: } else {
3123: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3124: "while attempting del\n", $userinput);
3125: }
3126: } else {
3127: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3128: "while attempting del\n", $userinput);
3129: }
3130: return 1;
3131: }
3132: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 3133:
1.231 foxr 3134: #
3135: # List the set of keys that are defined in a profile database file.
3136: # A successful reply from this will contain an & separated list of
3137: # the keys.
3138: # Parameters:
3139: # $cmd - Command request (keys).
3140: # $tail - Remainder of the request, a colon separated
3141: # list containing domain/user that identifies the
3142: # user being queried, and the database namespace
3143: # (database filename essentially).
3144: # $client - File open on the client.
3145: # Returns:
3146: # 1 - Continue processing.
3147: # 0 - Exit the server.
3148: #
3149: sub get_profile_keys {
3150: my ($cmd, $tail, $client) = @_;
3151:
3152: my $userinput = "$cmd:$tail";
3153:
3154: my ($udom,$uname,$namespace)=split(/:/,$tail);
3155: my $qresult='';
3156: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3157: &GDBM_READER());
3158: if ($hashref) {
3159: foreach my $key (keys %$hashref) {
3160: $qresult.="$key&";
3161: }
1.315 albertel 3162: if (&untie_user_hash($hashref)) {
1.231 foxr 3163: $qresult=~s/\&$//;
1.387 albertel 3164: &Reply($client, \$qresult, $userinput);
1.231 foxr 3165: } else {
3166: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3167: "while attempting keys\n", $userinput);
3168: }
3169: } else {
3170: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3171: "while attempting keys\n", $userinput);
3172: }
3173:
3174: return 1;
3175: }
3176: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3177:
3178: #
3179: # Dump the contents of a user profile database.
3180: # Note that this constitutes a very large covert channel too since
3181: # the dump will return sensitive information that is not encrypted.
3182: # The naive security assumption is that the session negotiation ensures
3183: # our client is trusted and I don't believe that's assured at present.
3184: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3185: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3186: #
3187: # Parameters:
3188: # $cmd - The command request keyword (currentdump).
3189: # $tail - Remainder of the request, consisting of a colon
3190: # separated list that has the domain/username and
3191: # the namespace to dump (database file).
3192: # $client - file open on the remote client.
3193: # Returns:
3194: # 1 - Continue processing.
3195: # 0 - Exit the server.
3196: #
3197: sub dump_profile_database {
3198: my ($cmd, $tail, $client) = @_;
3199:
3200: my $userinput = "$cmd:$tail";
3201:
3202: my ($udom,$uname,$namespace) = split(/:/,$tail);
3203: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3204: &GDBM_READER());
3205: if ($hashref) {
3206: # Structure of %data:
3207: # $data{$symb}->{$parameter}=$value;
3208: # $data{$symb}->{'v.'.$parameter}=$version;
3209: # since $parameter will be unescaped, we do not
3210: # have to worry about silly parameter names...
3211:
3212: my $qresult='';
3213: my %data = (); # A hash of anonymous hashes..
3214: while (my ($key,$value) = each(%$hashref)) {
3215: my ($v,$symb,$param) = split(/:/,$key);
3216: next if ($v eq 'version' || $symb eq 'keys');
3217: next if (exists($data{$symb}) &&
3218: exists($data{$symb}->{$param}) &&
3219: $data{$symb}->{'v.'.$param} > $v);
3220: $data{$symb}->{$param}=$value;
3221: $data{$symb}->{'v.'.$param}=$v;
3222: }
1.311 albertel 3223: if (&untie_user_hash($hashref)) {
1.231 foxr 3224: while (my ($symb,$param_hash) = each(%data)) {
3225: while(my ($param,$value) = each (%$param_hash)){
3226: next if ($param =~ /^v\./); # Ignore versions...
3227: #
3228: # Just dump the symb=value pairs separated by &
3229: #
3230: $qresult.=$symb.':'.$param.'='.$value.'&';
3231: }
3232: }
3233: chop($qresult);
1.387 albertel 3234: &Reply($client , \$qresult, $userinput);
1.231 foxr 3235: } else {
3236: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3237: "while attempting currentdump\n", $userinput);
3238: }
3239: } else {
3240: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3241: "while attempting currentdump\n", $userinput);
3242: }
3243:
3244: return 1;
3245: }
3246: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3247:
3248: #
3249: # Dump a profile database with an optional regular expression
3250: # to match against the keys. In this dump, no effort is made
3251: # to separate symb from version information. Presumably the
3252: # databases that are dumped by this command are of a different
3253: # structure. Need to look at this and improve the documentation of
3254: # both this and the currentdump handler.
3255: # Parameters:
3256: # $cmd - The command keyword.
3257: # $tail - All of the characters after the $cmd:
3258: # These are expected to be a colon
3259: # separated list containing:
3260: # domain/user - identifying the user.
3261: # namespace - identifying the database.
3262: # regexp - optional regular expression
3263: # that is matched against
3264: # database keywords to do
3265: # selective dumps.
1.488 raeburn 3266: # range - optional range of entries
3267: # e.g., 10-20 would return the
3268: # 10th to 19th items, etc.
1.231 foxr 3269: # $client - Channel open on the client.
3270: # Returns:
3271: # 1 - Continue processing.
3272: # Side effects:
3273: # response is written to $client.
3274: #
3275: sub dump_with_regexp {
3276: my ($cmd, $tail, $client) = @_;
3277:
3278:
3279: my $userinput = "$cmd:$tail";
3280:
1.489.2.1 raeburn 3281: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 3282: if (defined($regexp)) {
3283: $regexp=&unescape($regexp);
3284: } else {
3285: $regexp='.';
3286: }
1.306 albertel 3287: my ($start,$end);
3288: if (defined($range)) {
3289: if ($range =~/^(\d+)\-(\d+)$/) {
3290: ($start,$end) = ($1,$2);
3291: } elsif ($range =~/^(\d+)$/) {
3292: ($start,$end) = (0,$1);
3293: } else {
3294: undef($range);
3295: }
3296: }
1.231 foxr 3297: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3298: &GDBM_READER());
3299: if ($hashref) {
3300: my $qresult='';
1.306 albertel 3301: my $count=0;
1.488 raeburn 3302: #
3303: # When dump is for roles.db, determine if LON-CAPA version checking is needed.
1.489.2.1 raeburn 3304: # Sessions on 2.10 and later do not require version checking, as that occurs
3305: # on the server hosting the user session, when constructing the roles/courses
1.488 raeburn 3306: # screen).
1.489.2.1 raeburn 3307: #
3308: my $skipcheck;
1.450 raeburn 3309: my @ids = &Apache::lonnet::current_machine_ids();
1.453 raeburn 3310: my (%homecourses,$major,$minor,$now);
1.489.2.1 raeburn 3311: #
3312: # If dump is for roles.db from a pre-2.10 server, determine the LON-CAPA
3313: # version on the server which requested the data. For LON-CAPA 2.9, the
1.488 raeburn 3314: # client session will have sent its LON-CAPA version when initiating the
3315: # connection. For LON-CAPA 2.8 and older, the version is retrieved from
3316: # the global %loncaparevs in lonnet.pm.
3317: #
1.489.2.1 raeburn 3318: #
3319: if ($namespace eq 'roles') {
1.453 raeburn 3320: my $loncaparev = $clientversion;
3321: if ($loncaparev eq '') {
3322: $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
3323: }
3324: if ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?/) {
3325: $major = $1;
3326: $minor = $2;
3327: }
1.489.2.1 raeburn 3328: if (($major > 2) || (($major == 2) && ($minor > 9))) {
3329: $skipcheck = 1;
3330: }
1.453 raeburn 3331: $now = time;
3332: }
1.231 foxr 3333: while (my ($key,$value) = each(%$hashref)) {
1.489.2.1 raeburn 3334: if (($namespace eq 'roles') && (!$skipcheck)) {
1.453 raeburn 3335: if ($key =~ m{^/($LONCAPA::match_domain)/($LONCAPA::match_courseid)(/?[^_]*)_(cc|co|in|ta|ep|ad|st|cr)$}) {
1.446 raeburn 3336: my $cdom = $1;
3337: my $cnum = $2;
1.489.2.1 raeburn 3338: my ($role,$roleend,$rolestart) = split(/\_/,$value);
3339: if (!$roleend || $roleend > $now) {
1.488 raeburn 3340: #
3341: # For active course roles, check that requesting server is running a LON-CAPA
3342: # version which meets any version requirements for the course. Do not include
3343: # the role amongst the results returned if the requesting server's version is
3344: # too old.
3345: #
3346: # This determination is handled differently depending on whether the course's
3347: # homeserver is the current server, or whether it is a different server.
3348: # In both cases, the course's version requirement needs to be retrieved.
3349: #
1.489.2.1 raeburn 3350: next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major,
3351: $minor,\%homecourses,\@ids));
1.432 raeburn 3352: }
3353: }
3354: }
1.231 foxr 3355: if ($regexp eq '.') {
1.306 albertel 3356: $count++;
3357: if (defined($range) && $count >= $end) { last; }
3358: if (defined($range) && $count < $start) { next; }
1.231 foxr 3359: $qresult.=$key.'='.$value.'&';
3360: } else {
3361: my $unescapeKey = &unescape($key);
3362: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 3363: $count++;
3364: if (defined($range) && $count >= $end) { last; }
3365: if (defined($range) && $count < $start) { next; }
1.231 foxr 3366: $qresult.="$key=$value&";
3367: }
3368: }
3369: }
1.311 albertel 3370: if (&untie_user_hash($hashref)) {
1.488 raeburn 3371: #
3372: # If dump is for roles.db from a pre-2.10 server, check if the LON-CAPA
3373: # version requirements for courses for which the current server is the home
3374: # server permit course roles to be usable on the client server hosting the
3375: # user's session. If so, include those role results in the data returned to
3376: # the client server.
3377: #
1.456 raeburn 3378: if (($namespace eq 'roles') && (!$skipcheck)) {
1.453 raeburn 3379: if (keys(%homecourses) > 0) {
1.489 raeburn 3380: $qresult .= &check_homecourses(\%homecourses,$regexp,$count,
1.453 raeburn 3381: $range,$start,$end,$major,$minor);
3382: }
3383: }
1.231 foxr 3384: chop($qresult);
1.387 albertel 3385: &Reply($client, \$qresult, $userinput);
1.231 foxr 3386: } else {
3387: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3388: "while attempting dump\n", $userinput);
3389: }
3390: } else {
3391: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3392: "while attempting dump\n", $userinput);
3393: }
3394:
3395: return 1;
3396: }
3397: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3398:
3399: # Store a set of key=value pairs associated with a versioned name.
3400: #
3401: # Parameters:
3402: # $cmd - Request command keyword.
3403: # $tail - Tail of the request. This is a colon
3404: # separated list containing:
3405: # domain/user - User and authentication domain.
3406: # namespace - Name of the database being modified
3407: # rid - Resource keyword to modify.
3408: # what - new value associated with rid.
3409: #
3410: # $client - Socket open on the client.
3411: #
3412: #
3413: # Returns:
3414: # 1 (keep on processing).
3415: # Side-Effects:
3416: # Writes to the client
3417: sub store_handler {
3418: my ($cmd, $tail, $client) = @_;
3419:
3420: my $userinput = "$cmd:$tail";
3421:
3422: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3423: if ($namespace ne 'roles') {
3424:
3425: chomp($what);
3426: my @pairs=split(/\&/,$what);
3427: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 3428: &GDBM_WRCREAT(), "S",
1.231 foxr 3429: "$rid:$what");
3430: if ($hashref) {
3431: my $now = time;
3432: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3433: my $key;
3434: $hashref->{"version:$rid"}++;
3435: my $version=$hashref->{"version:$rid"};
3436: my $allkeys='';
3437: foreach my $pair (@pairs) {
3438: my ($key,$value)=split(/=/,$pair);
3439: $allkeys.=$key.':';
3440: $hashref->{"$version:$rid:$key"}=$value;
3441: }
3442: $hashref->{"$version:$rid:timestamp"}=$now;
3443: $allkeys.='timestamp';
3444: $hashref->{"$version:keys:$rid"}=$allkeys;
1.311 albertel 3445: if (&untie_user_hash($hashref)) {
1.231 foxr 3446: &Reply($client, "ok\n", $userinput);
3447: } else {
3448: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3449: "while attempting store\n", $userinput);
3450: }
3451: } else {
3452: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3453: "while attempting store\n", $userinput);
3454: }
3455: } else {
3456: &Failure($client, "refused\n", $userinput);
3457: }
3458:
3459: return 1;
3460: }
3461: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 3462:
1.323 albertel 3463: # Modify a set of key=value pairs associated with a versioned name.
3464: #
3465: # Parameters:
3466: # $cmd - Request command keyword.
3467: # $tail - Tail of the request. This is a colon
3468: # separated list containing:
3469: # domain/user - User and authentication domain.
3470: # namespace - Name of the database being modified
3471: # rid - Resource keyword to modify.
3472: # v - Version item to modify
3473: # what - new value associated with rid.
3474: #
3475: # $client - Socket open on the client.
3476: #
3477: #
3478: # Returns:
3479: # 1 (keep on processing).
3480: # Side-Effects:
3481: # Writes to the client
3482: sub putstore_handler {
3483: my ($cmd, $tail, $client) = @_;
3484:
3485: my $userinput = "$cmd:$tail";
3486:
3487: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3488: if ($namespace ne 'roles') {
3489:
3490: chomp($what);
3491: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3492: &GDBM_WRCREAT(), "M",
3493: "$rid:$v:$what");
3494: if ($hashref) {
3495: my $now = time;
3496: my %data = &hash_extract($what);
3497: my @allkeys;
3498: while (my($key,$value) = each(%data)) {
3499: push(@allkeys,$key);
3500: $hashref->{"$v:$rid:$key"} = $value;
3501: }
3502: my $allkeys = join(':',@allkeys);
3503: $hashref->{"$v:keys:$rid"}=$allkeys;
3504:
3505: if (&untie_user_hash($hashref)) {
3506: &Reply($client, "ok\n", $userinput);
3507: } else {
3508: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3509: "while attempting store\n", $userinput);
3510: }
3511: } else {
3512: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3513: "while attempting store\n", $userinput);
3514: }
3515: } else {
3516: &Failure($client, "refused\n", $userinput);
3517: }
3518:
3519: return 1;
3520: }
3521: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3522:
3523: sub hash_extract {
3524: my ($str)=@_;
3525: my %hash;
3526: foreach my $pair (split(/\&/,$str)) {
3527: my ($key,$value)=split(/=/,$pair);
3528: $hash{$key}=$value;
3529: }
3530: return (%hash);
3531: }
3532: sub hash_to_str {
3533: my ($hash_ref)=@_;
3534: my $str;
3535: foreach my $key (keys(%$hash_ref)) {
3536: $str.=$key.'='.$hash_ref->{$key}.'&';
3537: }
3538: $str=~s/\&$//;
3539: return $str;
3540: }
3541:
1.231 foxr 3542: #
3543: # Dump out all versions of a resource that has key=value pairs associated
3544: # with it for each version. These resources are built up via the store
3545: # command.
3546: #
3547: # Parameters:
3548: # $cmd - Command keyword.
3549: # $tail - Remainder of the request which consists of:
3550: # domain/user - User and auth. domain.
3551: # namespace - name of resource database.
3552: # rid - Resource id.
3553: # $client - socket open on the client.
3554: #
3555: # Returns:
3556: # 1 indicating the caller should not yet exit.
3557: # Side-effects:
3558: # Writes a reply to the client.
3559: # The reply is a string of the following shape:
3560: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3561: # Where the 1 above represents version 1.
3562: # this continues for all pairs of keys in all versions.
3563: #
3564: #
3565: #
3566: #
3567: sub restore_handler {
3568: my ($cmd, $tail, $client) = @_;
3569:
3570: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
1.351 banghart 3571: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
1.352 albertel 3572: $namespace=~s/\//\_/g;
1.350 albertel 3573: $namespace = &LONCAPA::clean_username($namespace);
1.349 albertel 3574:
1.231 foxr 3575: chomp($rid);
3576: my $qresult='';
1.309 albertel 3577: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3578: if ($hashref) {
3579: my $version=$hashref->{"version:$rid"};
1.231 foxr 3580: $qresult.="version=$version&";
3581: my $scope;
3582: for ($scope=1;$scope<=$version;$scope++) {
1.309 albertel 3583: my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231 foxr 3584: my @keys=split(/:/,$vkeys);
3585: my $key;
3586: $qresult.="$scope:keys=$vkeys&";
3587: foreach $key (@keys) {
1.309 albertel 3588: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
1.231 foxr 3589: }
3590: }
1.311 albertel 3591: if (&untie_user_hash($hashref)) {
1.231 foxr 3592: $qresult=~s/\&$//;
1.387 albertel 3593: &Reply( $client, \$qresult, $userinput);
1.231 foxr 3594: } else {
3595: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3596: "while attempting restore\n", $userinput);
3597: }
3598: } else {
3599: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3600: "while attempting restore\n", $userinput);
3601: }
3602:
3603: return 1;
3604:
3605:
3606: }
3607: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3608:
3609: #
1.324 raeburn 3610: # Add a chat message to a synchronous discussion board.
1.234 foxr 3611: #
3612: # Parameters:
3613: # $cmd - Request keyword.
3614: # $tail - Tail of the command. A colon separated list
3615: # containing:
3616: # cdom - Domain on which the chat board lives
1.324 raeburn 3617: # cnum - Course containing the chat board.
3618: # newpost - Body of the posting.
3619: # group - Optional group, if chat board is only
3620: # accessible in a group within the course
1.234 foxr 3621: # $client - Socket open on the client.
3622: # Returns:
3623: # 1 - Indicating caller should keep on processing.
3624: #
3625: # Side-effects:
3626: # writes a reply to the client.
3627: #
3628: #
3629: sub send_chat_handler {
3630: my ($cmd, $tail, $client) = @_;
3631:
3632:
3633: my $userinput = "$cmd:$tail";
3634:
1.324 raeburn 3635: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3636: &chat_add($cdom,$cnum,$newpost,$group);
1.234 foxr 3637: &Reply($client, "ok\n", $userinput);
3638:
3639: return 1;
3640: }
3641: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3642:
1.234 foxr 3643: #
1.324 raeburn 3644: # Retrieve the set of chat messages from a discussion board.
1.234 foxr 3645: #
3646: # Parameters:
3647: # $cmd - Command keyword that initiated the request.
3648: # $tail - Remainder of the request after the command
3649: # keyword. In this case a colon separated list of
3650: # chat domain - Which discussion board.
3651: # chat id - Discussion thread(?)
3652: # domain/user - Authentication domain and username
3653: # of the requesting person.
1.324 raeburn 3654: # group - Optional course group containing
3655: # the board.
1.234 foxr 3656: # $client - Socket open on the client program.
3657: # Returns:
3658: # 1 - continue processing
3659: # Side effects:
3660: # Response is written to the client.
3661: #
3662: sub retrieve_chat_handler {
3663: my ($cmd, $tail, $client) = @_;
3664:
3665:
3666: my $userinput = "$cmd:$tail";
3667:
1.324 raeburn 3668: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
1.234 foxr 3669: my $reply='';
1.324 raeburn 3670: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
1.234 foxr 3671: $reply.=&escape($_).':';
3672: }
3673: $reply=~s/\:$//;
1.387 albertel 3674: &Reply($client, \$reply, $userinput);
1.234 foxr 3675:
3676:
3677: return 1;
3678: }
3679: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3680:
3681: #
3682: # Initiate a query of an sql database. SQL query repsonses get put in
3683: # a file for later retrieval. This prevents sql query results from
3684: # bottlenecking the system. Note that with loncnew, perhaps this is
3685: # less of an issue since multiple outstanding requests can be concurrently
3686: # serviced.
3687: #
3688: # Parameters:
3689: # $cmd - COmmand keyword that initiated the request.
3690: # $tail - Remainder of the command after the keyword.
3691: # For this function, this consists of a query and
3692: # 3 arguments that are self-documentingly labelled
3693: # in the original arg1, arg2, arg3.
3694: # $client - Socket open on the client.
3695: # Return:
3696: # 1 - Indicating processing should continue.
3697: # Side-effects:
3698: # a reply is written to $client.
3699: #
3700: sub send_query_handler {
3701: my ($cmd, $tail, $client) = @_;
3702:
3703:
3704: my $userinput = "$cmd:$tail";
3705:
3706: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3707: $query=~s/\n*$//g;
3708: &Reply($client, "". &sql_reply("$clientname\&$query".
3709: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3710: $userinput);
3711:
3712: return 1;
3713: }
3714: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3715:
3716: #
3717: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3718: # The query is submitted via a "querysend" transaction.
3719: # There it is passed on to the lonsql daemon, queued and issued to
3720: # mysql.
3721: # This transaction is invoked when the sql transaction is complete
3722: # it stores the query results in flie and indicates query completion.
3723: # presumably local software then fetches this response... I'm guessing
3724: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3725: # lonsql on completion of the query interacts with the lond of our
3726: # client to do a query reply storing two files:
3727: # - id - The results of the query.
3728: # - id.end - Indicating the transaction completed.
3729: # NOTE: id is a unique id assigned to the query and querysend time.
3730: # Parameters:
3731: # $cmd - Command keyword that initiated this request.
3732: # $tail - Remainder of the tail. In this case that's a colon
3733: # separated list containing the query Id and the
3734: # results of the query.
3735: # $client - Socket open on the client.
3736: # Return:
3737: # 1 - Indicating that we should continue processing.
3738: # Side effects:
3739: # ok written to the client.
3740: #
3741: sub reply_query_handler {
3742: my ($cmd, $tail, $client) = @_;
3743:
3744:
3745: my $userinput = "$cmd:$tail";
3746:
1.339 albertel 3747: my ($id,$reply)=split(/:/,$tail);
1.234 foxr 3748: my $store;
3749: my $execdir=$perlvar{'lonDaemons'};
3750: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3751: $reply=~s/\&/\n/g;
3752: print $store $reply;
3753: close $store;
3754: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3755: print $store2 "done\n";
3756: close $store2;
3757: &Reply($client, "ok\n", $userinput);
3758: } else {
3759: &Failure($client, "error: ".($!+0)
3760: ." IO::File->new Failed ".
3761: "while attempting queryreply\n", $userinput);
3762: }
3763:
3764:
3765: return 1;
3766: }
3767: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3768:
3769: #
3770: # Process the courseidput request. Not quite sure what this means
3771: # at the system level sense. It appears a gdbm file in the
3772: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3773: # a set of entries made in that database.
3774: #
3775: # Parameters:
3776: # $cmd - The command keyword that initiated this request.
3777: # $tail - Tail of the command. In this case consists of a colon
3778: # separated list contaning the domain to apply this to and
3779: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3780: # Each value is a colon separated list that includes:
3781: # description, institutional code and course owner.
3782: # For backward compatibility with versions included
3783: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3784: # code and/or course owner are preserved from the existing
3785: # record when writing a new record in response to 1.1 or
3786: # 1.2 implementations of lonnet::flushcourselogs().
3787: #
1.234 foxr 3788: # $client - Socket open on the client.
3789: # Returns:
3790: # 1 - indicating that processing should continue
3791: #
3792: # Side effects:
3793: # reply is written to the client.
3794: #
3795: sub put_course_id_handler {
3796: my ($cmd, $tail, $client) = @_;
3797:
3798:
3799: my $userinput = "$cmd:$tail";
3800:
1.266 raeburn 3801: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3802: chomp($what);
3803: my $now=time;
3804: my @pairs=split(/\&/,$what);
3805:
3806: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3807: if ($hashref) {
3808: foreach my $pair (@pairs) {
1.271 raeburn 3809: my ($key,$courseinfo) = split(/=/,$pair,2);
3810: $courseinfo =~ s/=/:/g;
1.384 raeburn 3811: if (defined($hashref->{$key})) {
3812: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3813: if (ref($value) eq 'HASH') {
3814: my @items = ('description','inst_code','owner','type');
3815: my @new_items = split(/:/,$courseinfo,-1);
3816: my %storehash;
3817: for (my $i=0; $i<@new_items; $i++) {
1.391 raeburn 3818: $storehash{$items[$i]} = &unescape($new_items[$i]);
1.384 raeburn 3819: }
3820: $hashref->{$key} =
3821: &Apache::lonnet::freeze_escape(\%storehash);
3822: my $unesc_key = &unescape($key);
3823: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3824: next;
1.383 raeburn 3825: }
1.384 raeburn 3826: }
3827: my @current_items = split(/:/,$hashref->{$key},-1);
3828: shift(@current_items); # remove description
3829: pop(@current_items); # remove last access
3830: my $numcurrent = scalar(@current_items);
3831: if ($numcurrent > 3) {
3832: $numcurrent = 3;
3833: }
3834: my @new_items = split(/:/,$courseinfo,-1);
3835: my $numnew = scalar(@new_items);
3836: if ($numcurrent > 0) {
3837: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3838: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3839: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
1.333 raeburn 3840: }
1.272 raeburn 3841: }
3842: }
1.384 raeburn 3843: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3844: }
1.311 albertel 3845: if (&untie_domain_hash($hashref)) {
1.253 foxr 3846: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3847: } else {
1.253 foxr 3848: &Failure($client, "error: ".($!+0)
1.234 foxr 3849: ." untie(GDBM) Failed ".
3850: "while attempting courseidput\n", $userinput);
3851: }
3852: } else {
1.253 foxr 3853: &Failure($client, "error: ".($!+0)
1.234 foxr 3854: ." tie(GDBM) Failed ".
3855: "while attempting courseidput\n", $userinput);
3856: }
3857:
3858: return 1;
3859: }
3860: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3861:
1.383 raeburn 3862: sub put_course_id_hash_handler {
3863: my ($cmd, $tail, $client) = @_;
3864: my $userinput = "$cmd:$tail";
1.384 raeburn 3865: my ($udom,$mode,$what) = split(/:/, $tail,3);
1.383 raeburn 3866: chomp($what);
3867: my $now=time;
3868: my @pairs=split(/\&/,$what);
1.384 raeburn 3869: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
1.383 raeburn 3870: if ($hashref) {
3871: foreach my $pair (@pairs) {
3872: my ($key,$value)=split(/=/,$pair);
1.384 raeburn 3873: my $unesc_key = &unescape($key);
3874: if ($mode ne 'timeonly') {
3875: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3876: my $curritems = &Apache::lonnet::thaw_unescape($key);
3877: if (ref($curritems) ne 'HASH') {
3878: my @current_items = split(/:/,$hashref->{$key},-1);
3879: my $lasttime = pop(@current_items);
3880: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3881: } else {
3882: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3883: }
3884: }
3885: $hashref->{$key} = $value;
3886: }
3887: if ($mode ne 'notime') {
3888: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3889: }
1.383 raeburn 3890: }
3891: if (&untie_domain_hash($hashref)) {
3892: &Reply($client, "ok\n", $userinput);
3893: } else {
3894: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3895: "while attempting courseidputhash\n", $userinput);
3896: }
3897: } else {
3898: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3899: "while attempting courseidputhash\n", $userinput);
3900: }
3901: return 1;
3902: }
3903: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3904:
1.234 foxr 3905: # Retrieves the value of a course id resource keyword pattern
3906: # defined since a starting date. Both the starting date and the
3907: # keyword pattern are optional. If the starting date is not supplied it
3908: # is treated as the beginning of time. If the pattern is not found,
3909: # it is treatred as "." matching everything.
3910: #
3911: # Parameters:
3912: # $cmd - Command keyword that resulted in us being dispatched.
3913: # $tail - The remainder of the command that, in this case, consists
3914: # of a colon separated list of:
3915: # domain - The domain in which the course database is
3916: # defined.
3917: # since - Optional parameter describing the minimum
3918: # time of definition(?) of the resources that
3919: # will match the dump.
3920: # description - regular expression that is used to filter
3921: # the dump. Only keywords matching this regexp
3922: # will be used.
1.272 raeburn 3923: # institutional code - optional supplied code to filter
3924: # the dump. Only courses with an institutional code
3925: # that match the supplied code will be returned.
1.336 raeburn 3926: # owner - optional supplied username and domain of owner to
3927: # filter the dump. Only courses for which the course
3928: # owner matches the supplied username and/or domain
3929: # will be returned. Pre-2.2.0 legacy entries from
3930: # nohist_courseiddump will only contain usernames.
1.384 raeburn 3931: # type - optional parameter for selection
1.418 raeburn 3932: # regexp_ok - if 1 or -1 allow the supplied institutional code
3933: # filter to behave as a regular expression:
3934: # 1 will not exclude the course if the instcode matches the RE
3935: # -1 will exclude the course if the instcode matches the RE
1.384 raeburn 3936: # rtn_as_hash - whether to return the information available for
3937: # each matched item as a frozen hash of all
3938: # key, value pairs in the item's hash, or as a
3939: # colon-separated list of (in order) description,
3940: # institutional code, and course owner.
1.404 raeburn 3941: # selfenrollonly - filter by courses allowing self-enrollment
3942: # now or in the future (selfenrollonly = 1).
3943: # catfilter - filter by course category, assigned to a course
3944: # using manually defined categories (i.e., not
1.407 raeburn 3945: # self-cataloging based on on institutional code).
1.404 raeburn 3946: # showhidden - include course in results even if course
1.407 raeburn 3947: # was set to be excluded from course catalog (DC only).
1.404 raeburn 3948: # caller - if set to 'coursecatalog', courses set to be hidden
3949: # from course catalog will be excluded from results (unless
3950: # overridden by "showhidden".
1.427 raeburn 3951: # cloner - escaped username:domain of course cloner (if picking course to
1.419 raeburn 3952: # clone).
3953: # cc_clone_list - escaped comma separated list of courses for which
3954: # course cloner has active CC role (and so can clone
3955: # automatically).
1.427 raeburn 3956: # cloneonly - filter by courses for which cloner has rights to clone.
3957: # createdbefore - include courses for which creation date preceeded this date.
3958: # createdafter - include courses for which creation date followed this date.
3959: # creationcontext - include courses created in specified context
1.404 raeburn 3960: #
1.445 raeburn 3961: # domcloner - flag to indicate if user can create CCs in course's domain.
3962: # If so, ability to clone course is automatic.
3963: #
1.234 foxr 3964: # $client - The socket open on the client.
3965: # Returns:
3966: # 1 - Continue processing.
3967: # Side Effects:
3968: # a reply is written to $client.
3969: sub dump_course_id_handler {
3970: my ($cmd, $tail, $client) = @_;
3971: my $userinput = "$cmd:$tail";
3972:
1.333 raeburn 3973: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
1.404 raeburn 3974: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
1.427 raeburn 3975: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
1.445 raeburn 3976: $creationcontext,$domcloner) =split(/:/,$tail);
1.397 raeburn 3977: my $now = time;
1.419 raeburn 3978: my ($cloneruname,$clonerudom,%cc_clone);
1.234 foxr 3979: if (defined($description)) {
3980: $description=&unescape($description);
3981: } else {
3982: $description='.';
3983: }
1.266 raeburn 3984: if (defined($instcodefilter)) {
3985: $instcodefilter=&unescape($instcodefilter);
3986: } else {
3987: $instcodefilter='.';
3988: }
1.336 raeburn 3989: my ($ownerunamefilter,$ownerdomfilter);
1.266 raeburn 3990: if (defined($ownerfilter)) {
3991: $ownerfilter=&unescape($ownerfilter);
1.336 raeburn 3992: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3993: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3994: $ownerunamefilter = $1;
3995: $ownerdomfilter = $2;
3996: } else {
3997: $ownerunamefilter = $ownerfilter;
3998: $ownerdomfilter = '';
3999: }
4000: }
1.266 raeburn 4001: } else {
4002: $ownerfilter='.';
4003: }
1.336 raeburn 4004:
1.282 raeburn 4005: if (defined($coursefilter)) {
4006: $coursefilter=&unescape($coursefilter);
4007: } else {
4008: $coursefilter='.';
4009: }
1.333 raeburn 4010: if (defined($typefilter)) {
4011: $typefilter=&unescape($typefilter);
4012: } else {
4013: $typefilter='.';
4014: }
1.344 raeburn 4015: if (defined($regexp_ok)) {
4016: $regexp_ok=&unescape($regexp_ok);
4017: }
1.401 raeburn 4018: if (defined($catfilter)) {
4019: $catfilter=&unescape($catfilter);
4020: }
1.419 raeburn 4021: if (defined($cloner)) {
4022: $cloner = &unescape($cloner);
4023: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4024: }
4025: if (defined($cc_clone_list)) {
4026: $cc_clone_list = &unescape($cc_clone_list);
4027: my @cc_cloners = split('&',$cc_clone_list);
4028: foreach my $cid (@cc_cloners) {
4029: my ($clonedom,$clonenum) = split(':',$cid);
4030: next if ($clonedom ne $udom);
4031: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4032: }
4033: }
1.431 raeburn 4034: if ($createdbefore ne '') {
1.427 raeburn 4035: $createdbefore = &unescape($createdbefore);
4036: } else {
4037: $createdbefore = 0;
4038: }
1.431 raeburn 4039: if ($createdafter ne '') {
1.427 raeburn 4040: $createdafter = &unescape($createdafter);
4041: } else {
4042: $createdafter = 0;
4043: }
1.431 raeburn 4044: if ($creationcontext ne '') {
1.427 raeburn 4045: $creationcontext = &unescape($creationcontext);
4046: } else {
4047: $creationcontext = '.';
4048: }
1.384 raeburn 4049: my $unpack = 1;
1.485 raeburn 4050: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
1.384 raeburn 4051: $typefilter eq '.') {
4052: $unpack = 0;
4053: }
4054: if (!defined($since)) { $since=0; }
1.234 foxr 4055: my $qresult='';
4056: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4057: if ($hashref) {
1.384 raeburn 4058: while (my ($key,$value) = each(%$hashref)) {
1.397 raeburn 4059: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
1.427 raeburn 4060: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4061: $context);
1.384 raeburn 4062: $unesc_key = &unescape($key);
4063: if ($unesc_key =~ /^lasttime:/) {
4064: next;
4065: } else {
4066: $lasttime_key = &escape('lasttime:'.$unesc_key);
4067: }
4068: if ($hashref->{$lasttime_key} ne '') {
4069: $lasttime = $hashref->{$lasttime_key};
4070: next if ($lasttime<$since);
4071: }
1.419 raeburn 4072: my ($canclone,$valchange);
1.384 raeburn 4073: my $items = &Apache::lonnet::thaw_unescape($value);
4074: if (ref($items) eq 'HASH') {
1.429 raeburn 4075: if ($hashref->{$lasttime_key} eq '') {
1.430 raeburn 4076: next if ($since > 1);
1.429 raeburn 4077: }
1.384 raeburn 4078: $is_hash = 1;
1.445 raeburn 4079: if ($domcloner) {
4080: $canclone = 1;
4081: } elsif (defined($clonerudom)) {
1.419 raeburn 4082: if ($items->{'cloners'}) {
4083: my @cloneable = split(',',$items->{'cloners'});
4084: if (@cloneable) {
4085: if (grep(/^\*$/,@cloneable)) {
4086: $canclone = 1;
4087: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4088: $canclone = 1;
4089: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4090: $canclone = 1;
4091: }
4092: }
4093: unless ($canclone) {
4094: if ($cloneruname ne '' && $clonerudom ne '') {
4095: if ($cc_clone{$unesc_key}) {
4096: $canclone = 1;
4097: $items->{'cloners'} .= ','.$cloneruname.':'.
4098: $clonerudom;
4099: $valchange = 1;
4100: }
4101: }
4102: }
4103: } elsif (defined($cloneruname)) {
4104: if ($cc_clone{$unesc_key}) {
4105: $canclone = 1;
4106: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4107: $valchange = 1;
4108: }
1.437 raeburn 4109: unless ($canclone) {
4110: if ($items->{'owner'} =~ /:/) {
4111: if ($items->{'owner'} eq $cloner) {
4112: $canclone = 1;
4113: }
1.444 raeburn 4114: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
1.437 raeburn 4115: $canclone = 1;
4116: }
4117: if ($canclone) {
4118: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4119: $valchange = 1;
4120: }
4121: }
1.419 raeburn 4122: }
4123: }
1.384 raeburn 4124: if ($unpack || !$rtn_as_hash) {
4125: $unesc_val{'descr'} = $items->{'description'};
4126: $unesc_val{'inst_code'} = $items->{'inst_code'};
4127: $unesc_val{'owner'} = $items->{'owner'};
4128: $unesc_val{'type'} = $items->{'type'};
1.419 raeburn 4129: $unesc_val{'cloners'} = $items->{'cloners'};
1.427 raeburn 4130: $unesc_val{'created'} = $items->{'created'};
4131: $unesc_val{'context'} = $items->{'context'};
1.404 raeburn 4132: }
4133: $selfenroll_types = $items->{'selfenroll_types'};
4134: $selfenroll_end = $items->{'selfenroll_end_date'};
1.427 raeburn 4135: $created = $items->{'created'};
4136: $context = $items->{'context'};
1.404 raeburn 4137: if ($selfenrollonly) {
4138: next if (!$selfenroll_types);
4139: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4140: next;
1.397 raeburn 4141: }
1.404 raeburn 4142: }
1.427 raeburn 4143: if ($creationcontext ne '.') {
4144: next if (($context ne '') && ($context ne $creationcontext));
4145: }
4146: if ($createdbefore > 0) {
4147: next if (($created eq '') || ($created > $createdbefore));
4148: }
4149: if ($createdafter > 0) {
4150: next if (($created eq '') || ($created <= $createdafter));
4151: }
1.404 raeburn 4152: if ($catfilter ne '') {
1.406 raeburn 4153: next if ($items->{'categories'} eq '');
4154: my @categories = split('&',$items->{'categories'});
1.407 raeburn 4155: next if (@categories == 0);
4156: my @subcats = split('&',$catfilter);
4157: my $matchcat = 0;
4158: foreach my $cat (@categories) {
4159: if (grep(/^\Q$cat\E$/,@subcats)) {
4160: $matchcat = 1;
4161: last;
4162: }
4163: }
4164: next if (!$matchcat);
1.404 raeburn 4165: }
4166: if ($caller eq 'coursecatalog') {
1.405 raeburn 4167: if ($items->{'hidefromcat'} eq 'yes') {
4168: next if !$showhidden;
1.401 raeburn 4169: }
1.384 raeburn 4170: }
1.383 raeburn 4171: } else {
1.401 raeburn 4172: next if ($catfilter ne '');
1.419 raeburn 4173: next if ($selfenrollonly);
1.427 raeburn 4174: next if ($createdbefore || $createdafter);
4175: next if ($creationcontext ne '.');
1.419 raeburn 4176: if ((defined($clonerudom)) && (defined($cloneruname))) {
4177: if ($cc_clone{$unesc_key}) {
4178: $canclone = 1;
4179: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4180: }
4181: }
1.384 raeburn 4182: $is_hash = 0;
1.388 raeburn 4183: my @courseitems = split(/:/,$value);
1.403 raeburn 4184: $lasttime = pop(@courseitems);
1.402 raeburn 4185: if ($hashref->{$lasttime_key} eq '') {
4186: next if ($lasttime<$since);
4187: }
1.384 raeburn 4188: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
1.383 raeburn 4189: }
1.419 raeburn 4190: if ($cloneonly) {
4191: next unless ($canclone);
4192: }
1.266 raeburn 4193: my $match = 1;
1.384 raeburn 4194: if ($description ne '.') {
4195: if (!$is_hash) {
4196: $unesc_val{'descr'} = &unescape($val{'descr'});
4197: }
4198: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
1.266 raeburn 4199: $match = 0;
1.384 raeburn 4200: }
1.266 raeburn 4201: }
1.384 raeburn 4202: if ($instcodefilter ne '.') {
4203: if (!$is_hash) {
4204: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4205: }
1.418 raeburn 4206: if ($regexp_ok == 1) {
1.384 raeburn 4207: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
1.344 raeburn 4208: $match = 0;
4209: }
1.418 raeburn 4210: } elsif ($regexp_ok == -1) {
4211: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4212: $match = 0;
4213: }
1.344 raeburn 4214: } else {
1.384 raeburn 4215: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
1.344 raeburn 4216: $match = 0;
4217: }
1.266 raeburn 4218: }
1.234 foxr 4219: }
1.384 raeburn 4220: if ($ownerfilter ne '.') {
4221: if (!$is_hash) {
4222: $unesc_val{'owner'} = &unescape($val{'owner'});
4223: }
1.336 raeburn 4224: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
1.384 raeburn 4225: if ($unesc_val{'owner'} =~ /:/) {
4226: if (eval{$unesc_val{'owner'} !~
4227: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
1.336 raeburn 4228: $match = 0;
4229: }
4230: } else {
1.384 raeburn 4231: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336 raeburn 4232: $match = 0;
4233: }
4234: }
4235: } elsif ($ownerunamefilter ne '') {
1.384 raeburn 4236: if ($unesc_val{'owner'} =~ /:/) {
4237: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
1.336 raeburn 4238: $match = 0;
4239: }
4240: } else {
1.384 raeburn 4241: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336 raeburn 4242: $match = 0;
4243: }
4244: }
4245: } elsif ($ownerdomfilter ne '') {
1.384 raeburn 4246: if ($unesc_val{'owner'} =~ /:/) {
4247: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
1.336 raeburn 4248: $match = 0;
4249: }
4250: } else {
4251: if ($ownerdomfilter ne $udom) {
4252: $match = 0;
4253: }
4254: }
1.266 raeburn 4255: }
4256: }
1.384 raeburn 4257: if ($coursefilter ne '.') {
4258: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
1.282 raeburn 4259: $match = 0;
4260: }
4261: }
1.384 raeburn 4262: if ($typefilter ne '.') {
4263: if (!$is_hash) {
4264: $unesc_val{'type'} = &unescape($val{'type'});
4265: }
4266: if ($unesc_val{'type'} eq '') {
1.333 raeburn 4267: if ($typefilter ne 'Course') {
4268: $match = 0;
4269: }
1.383 raeburn 4270: } else {
1.384 raeburn 4271: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
1.333 raeburn 4272: $match = 0;
4273: }
4274: }
4275: }
1.266 raeburn 4276: if ($match == 1) {
1.384 raeburn 4277: if ($rtn_as_hash) {
4278: if ($is_hash) {
1.419 raeburn 4279: if ($valchange) {
4280: my $newvalue = &Apache::lonnet::freeze_escape($items);
4281: $qresult.=$key.'='.$newvalue.'&';
4282: } else {
4283: $qresult.=$key.'='.$value.'&';
4284: }
1.384 raeburn 4285: } else {
1.388 raeburn 4286: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4287: 'inst_code' => &unescape($val{'inst_code'}),
4288: 'owner' => &unescape($val{'owner'}),
4289: 'type' => &unescape($val{'type'}),
1.419 raeburn 4290: 'cloners' => &unescape($val{'cloners'}),
1.384 raeburn 4291: );
4292: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4293: $qresult.=$key.'='.$items.'&';
4294: }
1.383 raeburn 4295: } else {
1.384 raeburn 4296: if ($is_hash) {
4297: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4298: &escape($unesc_val{'inst_code'}).':'.
4299: &escape($unesc_val{'owner'}).'&';
4300: } else {
4301: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4302: ':'.$val{'owner'}.'&';
4303: }
1.383 raeburn 4304: }
1.266 raeburn 4305: }
1.234 foxr 4306: }
1.311 albertel 4307: if (&untie_domain_hash($hashref)) {
1.234 foxr 4308: chop($qresult);
1.387 albertel 4309: &Reply($client, \$qresult, $userinput);
1.234 foxr 4310: } else {
4311: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4312: "while attempting courseiddump\n", $userinput);
4313: }
4314: } else {
4315: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4316: "while attempting courseiddump\n", $userinput);
4317: }
4318: return 1;
4319: }
4320: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 4321:
1.438 raeburn 4322: sub course_lastaccess_handler {
4323: my ($cmd, $tail, $client) = @_;
4324: my $userinput = "$cmd:$tail";
4325: my ($cdom,$cnum) = split(':',$tail);
4326: my (%lastaccess,$qresult);
4327: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4328: if ($hashref) {
4329: while (my ($key,$value) = each(%$hashref)) {
4330: my ($unesc_key,$lasttime);
4331: $unesc_key = &unescape($key);
4332: if ($cnum) {
4333: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4334: }
4335: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4336: $lastaccess{$1} = $value;
4337: } else {
4338: my $items = &Apache::lonnet::thaw_unescape($value);
4339: if (ref($items) eq 'HASH') {
4340: unless ($lastaccess{$unesc_key}) {
4341: $lastaccess{$unesc_key} = '';
4342: }
4343: } else {
4344: my @courseitems = split(':',$value);
4345: $lastaccess{$unesc_key} = pop(@courseitems);
4346: }
4347: }
4348: }
4349: foreach my $cid (sort(keys(%lastaccess))) {
4350: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4351: }
4352: if (&untie_domain_hash($hashref)) {
4353: if ($qresult) {
4354: chop($qresult);
4355: }
4356: &Reply($client, \$qresult, $userinput);
4357: } else {
4358: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4359: "while attempting lastacourseaccess\n", $userinput);
4360: }
4361: } else {
4362: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4363: "while attempting lastcourseaccess\n", $userinput);
4364: }
4365: return 1;
4366: }
4367: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4368:
1.238 foxr 4369: #
1.348 raeburn 4370: # Puts an unencrypted entry in a namespace db file at the domain level
4371: #
4372: # Parameters:
4373: # $cmd - The command that got us here.
4374: # $tail - Tail of the command (remaining parameters).
4375: # $client - File descriptor connected to client.
4376: # Returns
4377: # 0 - Requested to exit, caller should shut down.
4378: # 1 - Continue processing.
4379: # Side effects:
4380: # reply is written to $client.
4381: #
4382: sub put_domain_handler {
4383: my ($cmd,$tail,$client) = @_;
4384:
4385: my $userinput = "$cmd:$tail";
4386:
4387: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4388: chomp($what);
4389: my @pairs=split(/\&/,$what);
4390: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4391: "P", $what);
4392: if ($hashref) {
4393: foreach my $pair (@pairs) {
4394: my ($key,$value)=split(/=/,$pair);
4395: $hashref->{$key}=$value;
4396: }
4397: if (&untie_domain_hash($hashref)) {
4398: &Reply($client, "ok\n", $userinput);
4399: } else {
4400: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4401: "while attempting putdom\n", $userinput);
4402: }
4403: } else {
4404: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4405: "while attempting putdom\n", $userinput);
4406: }
4407:
4408: return 1;
4409: }
4410: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4411:
4412: # Unencrypted get from the namespace database file at the domain level.
4413: # This function retrieves a keyed item from a specific named database in the
4414: # domain directory.
4415: #
4416: # Parameters:
4417: # $cmd - Command request keyword (get).
4418: # $tail - Tail of the command. This is a colon separated list
4419: # consisting of the domain and the 'namespace'
4420: # which selects the gdbm file to do the lookup in,
4421: # & separated list of keys to lookup. Note that
4422: # the values are returned as an & separated list too.
4423: # $client - File descriptor open on the client.
4424: # Returns:
4425: # 1 - Continue processing.
4426: # 0 - Exit.
4427: # Side effects:
4428: # reply is written to $client.
4429: #
4430:
4431: sub get_domain_handler {
4432: my ($cmd, $tail, $client) = @_;
4433:
1.461 foxr 4434:
1.348 raeburn 4435: my $userinput = "$client:$tail";
4436:
4437: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4438: chomp($what);
4439: my @queries=split(/\&/,$what);
4440: my $qresult='';
4441: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4442: if ($hashref) {
4443: for (my $i=0;$i<=$#queries;$i++) {
4444: $qresult.="$hashref->{$queries[$i]}&";
4445: }
4446: if (&untie_domain_hash($hashref)) {
4447: $qresult=~s/\&$//;
1.387 albertel 4448: &Reply($client, \$qresult, $userinput);
1.348 raeburn 4449: } else {
4450: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4451: "while attempting getdom\n",$userinput);
4452: }
4453: } else {
4454: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4455: "while attempting getdom\n",$userinput);
4456: }
4457:
4458: return 1;
4459: }
1.360 raeburn 4460: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
1.348 raeburn 4461:
1.420 raeburn 4462: #
1.238 foxr 4463: # Puts an id to a domains id database.
4464: #
4465: # Parameters:
4466: # $cmd - The command that triggered us.
4467: # $tail - Remainder of the request other than the command. This is a
4468: # colon separated list containing:
4469: # $domain - The domain for which we are writing the id.
4470: # $pairs - The id info to write... this is and & separated list
4471: # of keyword=value.
4472: # $client - Socket open on the client.
4473: # Returns:
4474: # 1 - Continue processing.
4475: # Side effects:
4476: # reply is written to $client.
4477: #
4478: sub put_id_handler {
4479: my ($cmd,$tail,$client) = @_;
4480:
4481:
4482: my $userinput = "$cmd:$tail";
4483:
4484: my ($udom,$what)=split(/:/,$tail);
4485: chomp($what);
4486: my @pairs=split(/\&/,$what);
4487: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4488: "P", $what);
4489: if ($hashref) {
4490: foreach my $pair (@pairs) {
4491: my ($key,$value)=split(/=/,$pair);
4492: $hashref->{$key}=$value;
4493: }
1.311 albertel 4494: if (&untie_domain_hash($hashref)) {
1.238 foxr 4495: &Reply($client, "ok\n", $userinput);
4496: } else {
4497: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4498: "while attempting idput\n", $userinput);
4499: }
4500: } else {
4501: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4502: "while attempting idput\n", $userinput);
4503: }
4504:
4505: return 1;
4506: }
1.263 albertel 4507: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 4508:
4509: #
4510: # Retrieves a set of id values from the id database.
4511: # Returns an & separated list of results, one for each requested id to the
4512: # client.
4513: #
4514: # Parameters:
4515: # $cmd - Command keyword that caused us to be dispatched.
4516: # $tail - Tail of the command. Consists of a colon separated:
4517: # domain - the domain whose id table we dump
4518: # ids Consists of an & separated list of
4519: # id keywords whose values will be fetched.
4520: # nonexisting keywords will have an empty value.
4521: # $client - Socket open on the client.
4522: #
4523: # Returns:
4524: # 1 - indicating processing should continue.
4525: # Side effects:
4526: # An & separated list of results is written to $client.
4527: #
4528: sub get_id_handler {
4529: my ($cmd, $tail, $client) = @_;
4530:
4531:
4532: my $userinput = "$client:$tail";
4533:
4534: my ($udom,$what)=split(/:/,$tail);
4535: chomp($what);
4536: my @queries=split(/\&/,$what);
4537: my $qresult='';
4538: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4539: if ($hashref) {
4540: for (my $i=0;$i<=$#queries;$i++) {
4541: $qresult.="$hashref->{$queries[$i]}&";
4542: }
1.311 albertel 4543: if (&untie_domain_hash($hashref)) {
1.238 foxr 4544: $qresult=~s/\&$//;
1.387 albertel 4545: &Reply($client, \$qresult, $userinput);
1.238 foxr 4546: } else {
4547: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4548: "while attempting idget\n",$userinput);
4549: }
4550: } else {
4551: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4552: "while attempting idget\n",$userinput);
4553: }
4554:
4555: return 1;
4556: }
1.263 albertel 4557: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 4558:
4559: #
1.299 raeburn 4560: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4561: #
4562: # Parameters
4563: # $cmd - Command keyword that caused us to be dispatched.
4564: # $tail - Tail of the command. Consists of a colon separated:
4565: # domain - the domain whose dcmail we are recording
4566: # email Consists of key=value pair
4567: # where key is unique msgid
4568: # and value is message (in XML)
4569: # $client - Socket open on the client.
4570: #
4571: # Returns:
4572: # 1 - indicating processing should continue.
4573: # Side effects
4574: # reply is written to $client.
4575: #
4576: sub put_dcmail_handler {
4577: my ($cmd,$tail,$client) = @_;
4578: my $userinput = "$cmd:$tail";
1.463 foxr 4579:
4580:
1.299 raeburn 4581: my ($udom,$what)=split(/:/,$tail);
4582: chomp($what);
4583: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4584: if ($hashref) {
4585: my ($key,$value)=split(/=/,$what);
4586: $hashref->{$key}=$value;
4587: }
1.311 albertel 4588: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4589: &Reply($client, "ok\n", $userinput);
4590: } else {
4591: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4592: "while attempting dcmailput\n", $userinput);
4593: }
4594: return 1;
4595: }
4596: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4597:
4598: #
4599: # Retrieves broadcast e-mail from nohist_dcmail database
4600: # Returns to client an & separated list of key=value pairs,
4601: # where key is msgid and value is message information.
4602: #
4603: # Parameters
4604: # $cmd - Command keyword that caused us to be dispatched.
4605: # $tail - Tail of the command. Consists of a colon separated:
4606: # domain - the domain whose dcmail table we dump
4607: # startfilter - beginning of time window
4608: # endfilter - end of time window
4609: # sendersfilter - & separated list of username:domain
4610: # for senders to search for.
4611: # $client - Socket open on the client.
4612: #
4613: # Returns:
4614: # 1 - indicating processing should continue.
4615: # Side effects
4616: # reply (& separated list of msgid=messageinfo pairs) is
4617: # written to $client.
4618: #
4619: sub dump_dcmail_handler {
4620: my ($cmd, $tail, $client) = @_;
4621:
4622: my $userinput = "$cmd:$tail";
4623: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4624: chomp($sendersfilter);
4625: my @senders = ();
4626: if (defined($startfilter)) {
4627: $startfilter=&unescape($startfilter);
4628: } else {
4629: $startfilter='.';
4630: }
4631: if (defined($endfilter)) {
4632: $endfilter=&unescape($endfilter);
4633: } else {
4634: $endfilter='.';
4635: }
4636: if (defined($sendersfilter)) {
4637: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 4638: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 4639: }
4640:
4641: my $qresult='';
4642: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4643: if ($hashref) {
4644: while (my ($key,$value) = each(%$hashref)) {
4645: my $match = 1;
1.303 albertel 4646: my ($timestamp,$subj,$uname,$udom) =
4647: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 4648: $subj = &unescape($subj);
4649: unless ($startfilter eq '.' || !defined($startfilter)) {
4650: if ($timestamp < $startfilter) {
4651: $match = 0;
4652: }
4653: }
4654: unless ($endfilter eq '.' || !defined($endfilter)) {
4655: if ($timestamp > $endfilter) {
4656: $match = 0;
4657: }
4658: }
4659: unless (@senders < 1) {
4660: unless (grep/^$uname:$udom$/,@senders) {
4661: $match = 0;
4662: }
4663: }
4664: if ($match == 1) {
4665: $qresult.=$key.'='.$value.'&';
4666: }
4667: }
1.311 albertel 4668: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4669: chop($qresult);
1.387 albertel 4670: &Reply($client, \$qresult, $userinput);
1.299 raeburn 4671: } else {
4672: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4673: "while attempting dcmaildump\n", $userinput);
4674: }
4675: } else {
4676: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4677: "while attempting dcmaildump\n", $userinput);
4678: }
4679: return 1;
4680: }
4681:
4682: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4683:
4684: #
4685: # Puts domain roles in nohist_domainroles database
4686: #
4687: # Parameters
4688: # $cmd - Command keyword that caused us to be dispatched.
4689: # $tail - Tail of the command. Consists of a colon separated:
4690: # domain - the domain whose roles we are recording
4691: # role - Consists of key=value pair
4692: # where key is unique role
4693: # and value is start/end date information
4694: # $client - Socket open on the client.
4695: #
4696: # Returns:
4697: # 1 - indicating processing should continue.
4698: # Side effects
4699: # reply is written to $client.
4700: #
4701:
4702: sub put_domainroles_handler {
4703: my ($cmd,$tail,$client) = @_;
4704:
4705: my $userinput = "$cmd:$tail";
4706: my ($udom,$what)=split(/:/,$tail);
4707: chomp($what);
4708: my @pairs=split(/\&/,$what);
4709: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4710: if ($hashref) {
4711: foreach my $pair (@pairs) {
4712: my ($key,$value)=split(/=/,$pair);
4713: $hashref->{$key}=$value;
4714: }
1.311 albertel 4715: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4716: &Reply($client, "ok\n", $userinput);
4717: } else {
4718: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4719: "while attempting domroleput\n", $userinput);
4720: }
4721: } else {
4722: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4723: "while attempting domroleput\n", $userinput);
4724: }
4725:
4726: return 1;
4727: }
4728:
4729: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4730:
4731: #
4732: # Retrieves domain roles from nohist_domainroles database
4733: # Returns to client an & separated list of key=value pairs,
4734: # where key is role and value is start and end date information.
4735: #
4736: # Parameters
4737: # $cmd - Command keyword that caused us to be dispatched.
4738: # $tail - Tail of the command. Consists of a colon separated:
4739: # domain - the domain whose domain roles table we dump
4740: # $client - Socket open on the client.
4741: #
4742: # Returns:
4743: # 1 - indicating processing should continue.
4744: # Side effects
4745: # reply (& separated list of role=start/end info pairs) is
4746: # written to $client.
4747: #
4748: sub dump_domainroles_handler {
4749: my ($cmd, $tail, $client) = @_;
4750:
4751: my $userinput = "$cmd:$tail";
4752: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4753: chomp($rolesfilter);
4754: my @roles = ();
4755: if (defined($startfilter)) {
4756: $startfilter=&unescape($startfilter);
4757: } else {
4758: $startfilter='.';
4759: }
4760: if (defined($endfilter)) {
4761: $endfilter=&unescape($endfilter);
4762: } else {
4763: $endfilter='.';
4764: }
4765: if (defined($rolesfilter)) {
4766: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 4767: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 4768: }
1.421 raeburn 4769:
1.299 raeburn 4770: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4771: if ($hashref) {
4772: my $qresult = '';
4773: while (my ($key,$value) = each(%$hashref)) {
4774: my $match = 1;
1.421 raeburn 4775: my ($end,$start) = split(/:/,&unescape($value));
1.299 raeburn 4776: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
1.421 raeburn 4777: unless (@roles < 1) {
4778: unless (grep/^\Q$trole\E$/,@roles) {
4779: $match = 0;
4780: next;
4781: }
4782: }
1.299 raeburn 4783: unless ($startfilter eq '.' || !defined($startfilter)) {
1.415 raeburn 4784: if ((defined($start)) && ($start >= $startfilter)) {
1.299 raeburn 4785: $match = 0;
1.421 raeburn 4786: next;
1.299 raeburn 4787: }
4788: }
4789: unless ($endfilter eq '.' || !defined($endfilter)) {
1.421 raeburn 4790: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
1.299 raeburn 4791: $match = 0;
1.421 raeburn 4792: next;
1.299 raeburn 4793: }
4794: }
4795: if ($match == 1) {
4796: $qresult.=$key.'='.$value.'&';
4797: }
4798: }
1.311 albertel 4799: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4800: chop($qresult);
1.387 albertel 4801: &Reply($client, \$qresult, $userinput);
1.299 raeburn 4802: } else {
4803: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4804: "while attempting domrolesdump\n", $userinput);
4805: }
4806: } else {
4807: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4808: "while attempting domrolesdump\n", $userinput);
4809: }
4810: return 1;
4811: }
4812:
4813: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4814:
4815:
1.238 foxr 4816: # Process the tmpput command I'm not sure what this does.. Seems to
4817: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4818: # where Id is the client's ip concatenated with a sequence number.
4819: # The file will contain some value that is passed in. Is this e.g.
4820: # a login token?
4821: #
4822: # Parameters:
4823: # $cmd - The command that got us dispatched.
4824: # $tail - The remainder of the request following $cmd:
4825: # In this case this will be the contents of the file.
4826: # $client - Socket connected to the client.
4827: # Returns:
4828: # 1 indicating processing can continue.
4829: # Side effects:
4830: # A file is created in the local filesystem.
4831: # A reply is sent to the client.
4832: sub tmp_put_handler {
4833: my ($cmd, $what, $client) = @_;
4834:
4835: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4836:
1.347 raeburn 4837: my ($record,$context) = split(/:/,$what);
4838: if ($context ne '') {
4839: chomp($context);
4840: $context = &unescape($context);
4841: }
4842: my ($id,$store);
1.238 foxr 4843: $tmpsnum++;
1.454 raeburn 4844: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
1.347 raeburn 4845: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4846: } else {
4847: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4848: }
1.238 foxr 4849: $id=~s/\W/\_/g;
1.347 raeburn 4850: $record=~s/\n//g;
1.238 foxr 4851: my $execdir=$perlvar{'lonDaemons'};
4852: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1.347 raeburn 4853: print $store $record;
1.238 foxr 4854: close $store;
1.387 albertel 4855: &Reply($client, \$id, $userinput);
1.238 foxr 4856: } else {
4857: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4858: "while attempting tmpput\n", $userinput);
4859: }
4860: return 1;
4861:
4862: }
4863: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 4864:
1.238 foxr 4865: # Processes the tmpget command. This command returns the contents
4866: # of a temporary resource file(?) created via tmpput.
4867: #
4868: # Paramters:
4869: # $cmd - Command that got us dispatched.
4870: # $id - Tail of the command, contain the id of the resource
4871: # we want to fetch.
4872: # $client - socket open on the client.
4873: # Return:
4874: # 1 - Inidcating processing can continue.
4875: # Side effects:
4876: # A reply is sent to the client.
4877: #
4878: sub tmp_get_handler {
4879: my ($cmd, $id, $client) = @_;
4880:
4881: my $userinput = "$cmd:$id";
4882:
4883:
4884: $id=~s/\W/\_/g;
4885: my $store;
4886: my $execdir=$perlvar{'lonDaemons'};
4887: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4888: my $reply=<$store>;
1.387 albertel 4889: &Reply( $client, \$reply, $userinput);
1.238 foxr 4890: close $store;
4891: } else {
4892: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4893: "while attempting tmpget\n", $userinput);
4894: }
4895:
4896: return 1;
4897: }
4898: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 4899:
1.238 foxr 4900: #
4901: # Process the tmpdel command. This command deletes a temp resource
4902: # created by the tmpput command.
4903: #
4904: # Parameters:
4905: # $cmd - Command that got us here.
4906: # $id - Id of the temporary resource created.
4907: # $client - socket open on the client process.
4908: #
4909: # Returns:
4910: # 1 - Indicating processing should continue.
4911: # Side Effects:
4912: # A file is deleted
4913: # A reply is sent to the client.
4914: sub tmp_del_handler {
4915: my ($cmd, $id, $client) = @_;
4916:
4917: my $userinput= "$cmd:$id";
4918:
4919: chomp($id);
4920: $id=~s/\W/\_/g;
4921: my $execdir=$perlvar{'lonDaemons'};
4922: if (unlink("$execdir/tmp/$id.tmp")) {
4923: &Reply($client, "ok\n", $userinput);
4924: } else {
4925: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4926: "while attempting tmpdel\n", $userinput);
4927: }
4928:
4929: return 1;
4930:
4931: }
4932: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 4933:
1.238 foxr 4934: #
1.246 foxr 4935: # Processes the setannounce command. This command
4936: # creates a file named announce.txt in the top directory of
4937: # the documentn root and sets its contents. The announce.txt file is
4938: # printed in its entirety at the LonCAPA login page. Note:
4939: # once the announcement.txt fileis created it cannot be deleted.
4940: # However, setting the contents of the file to empty removes the
4941: # announcement from the login page of loncapa so who cares.
4942: #
4943: # Parameters:
4944: # $cmd - The command that got us dispatched.
4945: # $announcement - The text of the announcement.
4946: # $client - Socket open on the client process.
4947: # Retunrns:
4948: # 1 - Indicating request processing should continue
4949: # Side Effects:
4950: # The file {DocRoot}/announcement.txt is created.
4951: # A reply is sent to $client.
4952: #
4953: sub set_announce_handler {
4954: my ($cmd, $announcement, $client) = @_;
4955:
4956: my $userinput = "$cmd:$announcement";
4957:
4958: chomp($announcement);
4959: $announcement=&unescape($announcement);
4960: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4961: '/announcement.txt')) {
4962: print $store $announcement;
4963: close $store;
4964: &Reply($client, "ok\n", $userinput);
4965: } else {
4966: &Failure($client, "error: ".($!+0)."\n", $userinput);
4967: }
4968:
4969: return 1;
4970: }
4971: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 4972:
1.246 foxr 4973: #
4974: # Return the version of the daemon. This can be used to determine
4975: # the compatibility of cross version installations or, alternatively to
4976: # simply know who's out of date and who isn't. Note that the version
4977: # is returned concatenated with the tail.
4978: # Parameters:
4979: # $cmd - the request that dispatched to us.
4980: # $tail - Tail of the request (client's version?).
4981: # $client - Socket open on the client.
4982: #Returns:
4983: # 1 - continue processing requests.
4984: # Side Effects:
4985: # Replies with version to $client.
4986: sub get_version_handler {
4987: my ($cmd, $tail, $client) = @_;
4988:
4989: my $userinput = $cmd.$tail;
4990:
4991: &Reply($client, &version($userinput)."\n", $userinput);
4992:
4993:
4994: return 1;
4995: }
4996: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 4997:
1.246 foxr 4998: # Set the current host and domain. This is used to support
4999: # multihomed systems. Each IP of the system, or even separate daemons
5000: # on the same IP can be treated as handling a separate lonCAPA virtual
5001: # machine. This command selects the virtual lonCAPA. The client always
5002: # knows the right one since it is lonc and it is selecting the domain/system
5003: # from the hosts.tab file.
5004: # Parameters:
5005: # $cmd - Command that dispatched us.
5006: # $tail - Tail of the command (domain/host requested).
5007: # $socket - Socket open on the client.
5008: #
5009: # Returns:
5010: # 1 - Indicates the program should continue to process requests.
5011: # Side-effects:
5012: # The default domain/system context is modified for this daemon.
5013: # a reply is sent to the client.
5014: #
5015: sub set_virtual_host_handler {
5016: my ($cmd, $tail, $socket) = @_;
5017:
5018: my $userinput ="$cmd:$tail";
5019:
5020: &Reply($client, &sethost($userinput)."\n", $userinput);
5021:
5022:
5023: return 1;
5024: }
1.247 albertel 5025: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 5026:
5027: # Process a request to exit:
5028: # - "bye" is sent to the client.
5029: # - The client socket is shutdown and closed.
5030: # - We indicate to the caller that we should exit.
5031: # Formal Parameters:
5032: # $cmd - The command that got us here.
5033: # $tail - Tail of the command (empty).
5034: # $client - Socket open on the tail.
5035: # Returns:
5036: # 0 - Indicating the program should exit!!
5037: #
5038: sub exit_handler {
5039: my ($cmd, $tail, $client) = @_;
5040:
5041: my $userinput = "$cmd:$tail";
5042:
5043: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5044: &Reply($client, "bye\n", $userinput);
5045: $client->shutdown(2); # shutdown the socket forcibly.
5046: $client->close();
5047:
5048: return 0;
5049: }
1.248 foxr 5050: ®ister_handler("exit", \&exit_handler, 0,1,1);
5051: ®ister_handler("init", \&exit_handler, 0,1,1);
5052: ®ister_handler("quit", \&exit_handler, 0,1,1);
5053:
5054: # Determine if auto-enrollment is enabled.
5055: # Note that the original had what I believe to be a defect.
5056: # The original returned 0 if the requestor was not a registerd client.
5057: # It should return "refused".
5058: # Formal Parameters:
5059: # $cmd - The command that invoked us.
5060: # $tail - The tail of the command (Extra command parameters.
5061: # $client - The socket open on the client that issued the request.
5062: # Returns:
5063: # 1 - Indicating processing should continue.
5064: #
5065: sub enrollment_enabled_handler {
5066: my ($cmd, $tail, $client) = @_;
5067: my $userinput = $cmd.":".$tail; # For logging purposes.
5068:
5069:
1.337 albertel 5070: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5071:
1.248 foxr 5072: my $outcome = &localenroll::run($cdom);
1.387 albertel 5073: &Reply($client, \$outcome, $userinput);
1.248 foxr 5074:
5075: return 1;
5076: }
5077: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5078:
1.417 raeburn 5079: #
1.423 raeburn 5080: # Validate an institutional code used for a LON-CAPA course.
1.417 raeburn 5081: #
5082: # Formal Parameters:
5083: # $cmd - The command request that got us dispatched.
5084: # $tail - The tail of the command. In this case,
5085: # this is a colon separated set of words that will be split
5086: # into:
1.424 raeburn 5087: # $dom - The domain for which the check of
5088: # institutional course code will occur.
5089: #
5090: # $instcode - The institutional code for the course
5091: # being requested, or validated for rights
5092: # to request.
5093: #
5094: # $owner - The course requestor (who will be the
5095: # course owner, in the form username:domain
5096: #
1.417 raeburn 5097: # $client - Socket open on the client.
5098: # Returns:
5099: # 1 - Indicating processing should continue.
5100: #
5101: sub validate_instcode_handler {
5102: my ($cmd, $tail, $client) = @_;
5103: my $userinput = "$cmd:$tail";
1.423 raeburn 5104: my ($dom,$instcode,$owner) = split(/:/, $tail);
1.422 raeburn 5105: $instcode = &unescape($instcode);
5106: $owner = &unescape($owner);
1.489.2.3! raeburn 5107: my ($outcome,$description,$credits) =
1.426 raeburn 5108: &localenroll::validate_instcode($dom,$instcode,$owner);
1.489.2.3! raeburn 5109: my $result = &escape($outcome).'&'.&escape($description).'&'.
! 5110: &escape($credits);
1.426 raeburn 5111: &Reply($client, \$result, $userinput);
1.417 raeburn 5112:
5113: return 1;
5114: }
5115: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5116:
1.248 foxr 5117: # Get the official sections for which auto-enrollment is possible.
5118: # Since the admin people won't know about 'unofficial sections'
5119: # we cannot auto-enroll on them.
5120: # Formal Parameters:
5121: # $cmd - The command request that got us dispatched here.
5122: # $tail - The remainder of the request. In our case this
5123: # will be split into:
5124: # $coursecode - The course name from the admin point of view.
5125: # $cdom - The course's domain(?).
5126: # $client - Socket open on the client.
5127: # Returns:
5128: # 1 - Indiciting processing should continue.
5129: #
5130: sub get_sections_handler {
5131: my ($cmd, $tail, $client) = @_;
5132: my $userinput = "$cmd:$tail";
5133:
5134: my ($coursecode, $cdom) = split(/:/, $tail);
5135: my @secs = &localenroll::get_sections($coursecode,$cdom);
5136: my $seclist = &escape(join(':',@secs));
5137:
1.387 albertel 5138: &Reply($client, \$seclist, $userinput);
1.248 foxr 5139:
5140:
5141: return 1;
5142: }
5143: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5144:
5145: # Validate the owner of a new course section.
5146: #
5147: # Formal Parameters:
5148: # $cmd - Command that got us dispatched.
5149: # $tail - the remainder of the command. For us this consists of a
5150: # colon separated string containing:
5151: # $inst - Course Id from the institutions point of view.
5152: # $owner - Proposed owner of the course.
5153: # $cdom - Domain of the course (from the institutions
5154: # point of view?)..
5155: # $client - Socket open on the client.
5156: #
5157: # Returns:
5158: # 1 - Processing should continue.
5159: #
5160: sub validate_course_owner_handler {
5161: my ($cmd, $tail, $client) = @_;
5162: my $userinput = "$cmd:$tail";
1.470 raeburn 5163: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5164:
1.336 raeburn 5165: $owner = &unescape($owner);
1.470 raeburn 5166: $coowners = &unescape($coowners);
5167: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
1.387 albertel 5168: &Reply($client, \$outcome, $userinput);
1.248 foxr 5169:
5170:
5171:
5172: return 1;
5173: }
5174: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 5175:
1.248 foxr 5176: #
5177: # Validate a course section in the official schedule of classes
5178: # from the institutions point of view (part of autoenrollment).
5179: #
5180: # Formal Parameters:
5181: # $cmd - The command request that got us dispatched.
5182: # $tail - The tail of the command. In this case,
5183: # this is a colon separated set of words that will be split
5184: # into:
5185: # $inst_course_id - The course/section id from the
5186: # institutions point of view.
5187: # $cdom - The domain from the institutions
5188: # point of view.
5189: # $client - Socket open on the client.
5190: # Returns:
5191: # 1 - Indicating processing should continue.
5192: #
5193: sub validate_course_section_handler {
5194: my ($cmd, $tail, $client) = @_;
5195: my $userinput = "$cmd:$tail";
5196: my ($inst_course_id, $cdom) = split(/:/, $tail);
5197:
5198: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
1.387 albertel 5199: &Reply($client, \$outcome, $userinput);
1.248 foxr 5200:
5201:
5202: return 1;
5203: }
5204: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5205:
5206: #
1.340 raeburn 5207: # Validate course owner's access to enrollment data for specific class section.
5208: #
5209: #
5210: # Formal Parameters:
5211: # $cmd - The command request that got us dispatched.
5212: # $tail - The tail of the command. In this case this is a colon separated
5213: # set of words that will be split into:
5214: # $inst_class - Institutional code for the specific class section
5215: # $courseowner - The escaped username:domain of the course owner
5216: # $cdom - The domain of the course from the institution's
5217: # point of view.
5218: # $client - The socket open on the client.
5219: # Returns:
5220: # 1 - continue processing.
5221: #
5222:
5223: sub validate_class_access_handler {
5224: my ($cmd, $tail, $client) = @_;
5225: my $userinput = "$cmd:$tail";
1.383 raeburn 5226: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
1.392 raeburn 5227: my $owners = &unescape($ownerlist);
1.341 albertel 5228: my $outcome;
5229: eval {
5230: local($SIG{__DIE__})='DEFAULT';
1.392 raeburn 5231: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
1.341 albertel 5232: };
1.387 albertel 5233: &Reply($client,\$outcome, $userinput);
1.340 raeburn 5234:
5235: return 1;
5236: }
5237: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5238:
5239: #
5240: # Create a password for a new LON-CAPA user added by auto-enrollment.
5241: # Only used for case where authentication method for new user is localauth
1.248 foxr 5242: #
5243: # Formal Parameters:
5244: # $cmd - The command request that got us dispatched.
5245: # $tail - The tail of the command. In this case this is a colon separated
5246: # set of words that will be split into:
1.340 raeburn 5247: # $authparam - An authentication parameter (localauth parameter).
1.248 foxr 5248: # $cdom - The domain of the course from the institution's
5249: # point of view.
5250: # $client - The socket open on the client.
5251: # Returns:
5252: # 1 - continue processing.
5253: #
5254: sub create_auto_enroll_password_handler {
5255: my ($cmd, $tail, $client) = @_;
5256: my $userinput = "$cmd:$tail";
5257:
5258: my ($authparam, $cdom) = split(/:/, $userinput);
5259:
5260: my ($create_passwd,$authchk);
5261: ($authparam,
5262: $create_passwd,
5263: $authchk) = &localenroll::create_password($authparam,$cdom);
5264:
5265: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5266: $userinput);
5267:
5268:
5269: return 1;
5270: }
5271: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5272: 0, 1, 0);
5273:
5274: # Retrieve and remove temporary files created by/during autoenrollment.
5275: #
5276: # Formal Parameters:
5277: # $cmd - The command that got us dispatched.
5278: # $tail - The tail of the command. In our case this is a colon
5279: # separated list that will be split into:
5280: # $filename - The name of the file to remove.
5281: # The filename is given as a path relative to
5282: # the LonCAPA temp file directory.
5283: # $client - Socket open on the client.
5284: #
5285: # Returns:
5286: # 1 - Continue processing.
5287: sub retrieve_auto_file_handler {
5288: my ($cmd, $tail, $client) = @_;
5289: my $userinput = "cmd:$tail";
5290:
5291: my ($filename) = split(/:/, $tail);
5292:
5293: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5294: if ( (-e $source) && ($filename ne '') ) {
5295: my $reply = '';
5296: if (open(my $fh,$source)) {
5297: while (<$fh>) {
5298: chomp($_);
5299: $_ =~ s/^\s+//g;
5300: $_ =~ s/\s+$//g;
5301: $reply .= $_;
5302: }
5303: close($fh);
5304: &Reply($client, &escape($reply)."\n", $userinput);
5305:
5306: # Does this have to be uncommented??!? (RF).
5307: #
5308: # unlink($source);
5309: } else {
5310: &Failure($client, "error\n", $userinput);
5311: }
5312: } else {
5313: &Failure($client, "error\n", $userinput);
5314: }
5315:
5316:
5317: return 1;
5318: }
5319: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5320:
1.423 raeburn 5321: sub crsreq_checks_handler {
5322: my ($cmd, $tail, $client) = @_;
5323: my $userinput = "$cmd:$tail";
5324: my $dom = $tail;
5325: my $result;
1.424 raeburn 5326: my @reqtypes = ('official','unofficial','community');
1.423 raeburn 5327: eval {
5328: local($SIG{__DIE__})='DEFAULT';
5329: my %validations;
1.424 raeburn 5330: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5331: \%validations);
1.423 raeburn 5332: if ($response eq 'ok') {
5333: foreach my $key (keys(%validations)) {
5334: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5335: }
5336: $result =~ s/\&$//;
5337: } else {
5338: $result = 'error';
5339: }
5340: };
5341: if (!$@) {
5342: &Reply($client, \$result, $userinput);
5343: } else {
5344: &Failure($client,"unknown_cmd\n",$userinput);
5345: }
5346: return 1;
5347: }
5348: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5349:
5350: sub validate_crsreq_handler {
5351: my ($cmd, $tail, $client) = @_;
5352: my $userinput = "$cmd:$tail";
5353: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
5354: $instcode = &unescape($instcode);
5355: $owner = &unescape($owner);
5356: $crstype = &unescape($crstype);
5357: $inststatuslist = &unescape($inststatuslist);
5358: $instcode = &unescape($instcode);
5359: $instseclist = &unescape($instseclist);
5360: my $outcome;
5361: eval {
5362: local($SIG{__DIE__})='DEFAULT';
5363: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5364: $inststatuslist,$instcode,
5365: $instseclist);
5366: };
5367: if (!$@) {
5368: &Reply($client, \$outcome, $userinput);
5369: } else {
5370: &Failure($client,"unknown_cmd\n",$userinput);
5371: }
5372: return 1;
5373: }
5374: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5375:
1.248 foxr 5376: #
5377: # Read and retrieve institutional code format (for support form).
5378: # Formal Parameters:
5379: # $cmd - Command that dispatched us.
5380: # $tail - Tail of the command. In this case it conatins
5381: # the course domain and the coursename.
5382: # $client - Socket open on the client.
5383: # Returns:
5384: # 1 - Continue processing.
5385: #
5386: sub get_institutional_code_format_handler {
5387: my ($cmd, $tail, $client) = @_;
5388: my $userinput = "$cmd:$tail";
5389:
5390: my $reply;
5391: my($cdom,$course) = split(/:/,$tail);
5392: my @pairs = split/\&/,$course;
5393: my %instcodes = ();
5394: my %codes = ();
5395: my @codetitles = ();
5396: my %cat_titles = ();
5397: my %cat_order = ();
5398: foreach (@pairs) {
5399: my ($key,$value) = split/=/,$_;
5400: $instcodes{&unescape($key)} = &unescape($value);
5401: }
5402: my $formatreply = &localenroll::instcode_format($cdom,
5403: \%instcodes,
5404: \%codes,
5405: \@codetitles,
5406: \%cat_titles,
5407: \%cat_order);
5408: if ($formatreply eq 'ok') {
1.365 albertel 5409: my $codes_str = &Apache::lonnet::hash2str(%codes);
5410: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5411: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5412: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
1.248 foxr 5413: &Reply($client,
5414: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5415: .$cat_order_str."\n",
5416: $userinput);
5417: } else {
5418: # this else branch added by RF since if not ok, lonc will
5419: # hang waiting on reply until timeout.
5420: #
5421: &Reply($client, "format_error\n", $userinput);
5422: }
5423:
5424: return 1;
5425: }
1.265 albertel 5426: ®ister_handler("autoinstcodeformat",
5427: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 5428:
1.345 raeburn 5429: sub get_institutional_defaults_handler {
5430: my ($cmd, $tail, $client) = @_;
5431: my $userinput = "$cmd:$tail";
5432:
5433: my $dom = $tail;
5434: my %defaults_hash;
5435: my @code_order;
5436: my $outcome;
5437: eval {
5438: local($SIG{__DIE__})='DEFAULT';
5439: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5440: \@code_order);
5441: };
5442: if (!$@) {
5443: if ($outcome eq 'ok') {
5444: my $result='';
5445: while (my ($key,$value) = each(%defaults_hash)) {
5446: $result.=&escape($key).'='.&escape($value).'&';
5447: }
5448: $result .= 'code_order='.&escape(join('&',@code_order));
1.387 albertel 5449: &Reply($client,\$result,$userinput);
1.345 raeburn 5450: } else {
5451: &Reply($client,"error\n", $userinput);
5452: }
5453: } else {
5454: &Failure($client,"unknown_cmd\n",$userinput);
5455: }
5456: }
5457: ®ister_handler("autoinstcodedefaults",
5458: \&get_institutional_defaults_handler,0,1,0);
5459:
1.416 raeburn 5460: sub get_possible_instcodes_handler {
5461: my ($cmd, $tail, $client) = @_;
5462: my $userinput = "$cmd:$tail";
5463:
5464: my $reply;
5465: my $cdom = $tail;
1.417 raeburn 5466: my (@codetitles,%cat_titles,%cat_order,@code_order);
1.416 raeburn 5467: my $formatreply = &localenroll::possible_instcodes($cdom,
5468: \@codetitles,
5469: \%cat_titles,
1.417 raeburn 5470: \%cat_order,
5471: \@code_order);
1.416 raeburn 5472: if ($formatreply eq 'ok') {
5473: my $result = join('&',map {&escape($_);} (@codetitles)).':';
1.417 raeburn 5474: $result .= join('&',map {&escape($_);} (@code_order)).':';
1.416 raeburn 5475: foreach my $key (keys(%cat_titles)) {
5476: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5477: }
5478: $result =~ s/\&$//;
5479: $result .= ':';
5480: foreach my $key (keys(%cat_order)) {
5481: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5482: }
5483: $result =~ s/\&$//;
5484: &Reply($client,\$result,$userinput);
5485: } else {
5486: &Reply($client, "format_error\n", $userinput);
5487: }
5488: return 1;
5489: }
5490: ®ister_handler("autopossibleinstcodes",
5491: \&get_possible_instcodes_handler,0,1,0);
5492:
1.381 raeburn 5493: sub get_institutional_user_rules {
5494: my ($cmd, $tail, $client) = @_;
5495: my $userinput = "$cmd:$tail";
5496: my $dom = &unescape($tail);
5497: my (%rules_hash,@rules_order);
5498: my $outcome;
5499: eval {
5500: local($SIG{__DIE__})='DEFAULT';
5501: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5502: };
5503: if (!$@) {
5504: if ($outcome eq 'ok') {
5505: my $result;
5506: foreach my $key (keys(%rules_hash)) {
5507: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5508: }
5509: $result =~ s/\&$//;
5510: $result .= ':';
5511: if (@rules_order > 0) {
5512: foreach my $item (@rules_order) {
5513: $result .= &escape($item).'&';
5514: }
5515: }
5516: $result =~ s/\&$//;
1.387 albertel 5517: &Reply($client,\$result,$userinput);
1.381 raeburn 5518: } else {
5519: &Reply($client,"error\n", $userinput);
5520: }
5521: } else {
5522: &Failure($client,"unknown_cmd\n",$userinput);
5523: }
5524: }
5525: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5526:
1.389 raeburn 5527: sub get_institutional_id_rules {
5528: my ($cmd, $tail, $client) = @_;
5529: my $userinput = "$cmd:$tail";
5530: my $dom = &unescape($tail);
5531: my (%rules_hash,@rules_order);
5532: my $outcome;
5533: eval {
5534: local($SIG{__DIE__})='DEFAULT';
5535: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5536: };
5537: if (!$@) {
5538: if ($outcome eq 'ok') {
5539: my $result;
5540: foreach my $key (keys(%rules_hash)) {
5541: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5542: }
5543: $result =~ s/\&$//;
5544: $result .= ':';
5545: if (@rules_order > 0) {
5546: foreach my $item (@rules_order) {
5547: $result .= &escape($item).'&';
5548: }
5549: }
5550: $result =~ s/\&$//;
5551: &Reply($client,\$result,$userinput);
5552: } else {
5553: &Reply($client,"error\n", $userinput);
5554: }
5555: } else {
5556: &Failure($client,"unknown_cmd\n",$userinput);
5557: }
5558: }
5559: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
5560:
1.397 raeburn 5561: sub get_institutional_selfcreate_rules {
1.396 raeburn 5562: my ($cmd, $tail, $client) = @_;
5563: my $userinput = "$cmd:$tail";
5564: my $dom = &unescape($tail);
5565: my (%rules_hash,@rules_order);
5566: my $outcome;
5567: eval {
5568: local($SIG{__DIE__})='DEFAULT';
1.397 raeburn 5569: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
1.396 raeburn 5570: };
5571: if (!$@) {
5572: if ($outcome eq 'ok') {
5573: my $result;
5574: foreach my $key (keys(%rules_hash)) {
5575: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5576: }
5577: $result =~ s/\&$//;
5578: $result .= ':';
5579: if (@rules_order > 0) {
5580: foreach my $item (@rules_order) {
5581: $result .= &escape($item).'&';
5582: }
5583: }
5584: $result =~ s/\&$//;
5585: &Reply($client,\$result,$userinput);
5586: } else {
5587: &Reply($client,"error\n", $userinput);
5588: }
5589: } else {
5590: &Failure($client,"unknown_cmd\n",$userinput);
5591: }
5592: }
1.397 raeburn 5593: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
1.396 raeburn 5594:
1.381 raeburn 5595:
5596: sub institutional_username_check {
5597: my ($cmd, $tail, $client) = @_;
5598: my $userinput = "$cmd:$tail";
5599: my %rulecheck;
5600: my $outcome;
5601: my ($udom,$uname,@rules) = split(/:/,$tail);
5602: $udom = &unescape($udom);
5603: $uname = &unescape($uname);
5604: @rules = map {&unescape($_);} (@rules);
5605: eval {
5606: local($SIG{__DIE__})='DEFAULT';
5607: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
5608: };
5609: if (!$@) {
5610: if ($outcome eq 'ok') {
5611: my $result='';
5612: foreach my $key (keys(%rulecheck)) {
5613: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5614: }
1.387 albertel 5615: &Reply($client,\$result,$userinput);
1.381 raeburn 5616: } else {
5617: &Reply($client,"error\n", $userinput);
5618: }
5619: } else {
5620: &Failure($client,"unknown_cmd\n",$userinput);
5621: }
5622: }
5623: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
5624:
1.389 raeburn 5625: sub institutional_id_check {
5626: my ($cmd, $tail, $client) = @_;
5627: my $userinput = "$cmd:$tail";
5628: my %rulecheck;
5629: my $outcome;
5630: my ($udom,$id,@rules) = split(/:/,$tail);
5631: $udom = &unescape($udom);
5632: $id = &unescape($id);
5633: @rules = map {&unescape($_);} (@rules);
5634: eval {
5635: local($SIG{__DIE__})='DEFAULT';
5636: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
5637: };
5638: if (!$@) {
5639: if ($outcome eq 'ok') {
5640: my $result='';
5641: foreach my $key (keys(%rulecheck)) {
5642: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5643: }
5644: &Reply($client,\$result,$userinput);
5645: } else {
5646: &Reply($client,"error\n", $userinput);
5647: }
5648: } else {
5649: &Failure($client,"unknown_cmd\n",$userinput);
5650: }
5651: }
5652: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
1.345 raeburn 5653:
1.397 raeburn 5654: sub institutional_selfcreate_check {
1.396 raeburn 5655: my ($cmd, $tail, $client) = @_;
5656: my $userinput = "$cmd:$tail";
5657: my %rulecheck;
5658: my $outcome;
5659: my ($udom,$email,@rules) = split(/:/,$tail);
5660: $udom = &unescape($udom);
5661: $email = &unescape($email);
5662: @rules = map {&unescape($_);} (@rules);
5663: eval {
5664: local($SIG{__DIE__})='DEFAULT';
1.397 raeburn 5665: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
1.396 raeburn 5666: };
5667: if (!$@) {
5668: if ($outcome eq 'ok') {
5669: my $result='';
5670: foreach my $key (keys(%rulecheck)) {
5671: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5672: }
5673: &Reply($client,\$result,$userinput);
5674: } else {
5675: &Reply($client,"error\n", $userinput);
5676: }
5677: } else {
5678: &Failure($client,"unknown_cmd\n",$userinput);
5679: }
5680: }
1.397 raeburn 5681: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
1.396 raeburn 5682:
1.317 raeburn 5683: # Get domain specific conditions for import of student photographs to a course
5684: #
5685: # Retrieves information from photo_permission subroutine in localenroll.
5686: # Returns outcome (ok) if no processing errors, and whether course owner is
5687: # required to accept conditions of use (yes/no).
5688: #
5689: #
5690: sub photo_permission_handler {
5691: my ($cmd, $tail, $client) = @_;
5692: my $userinput = "$cmd:$tail";
5693: my $cdom = $tail;
5694: my ($perm_reqd,$conditions);
1.320 albertel 5695: my $outcome;
5696: eval {
5697: local($SIG{__DIE__})='DEFAULT';
5698: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
5699: \$conditions);
5700: };
5701: if (!$@) {
5702: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
5703: $userinput);
5704: } else {
5705: &Failure($client,"unknown_cmd\n",$userinput);
5706: }
5707: return 1;
1.317 raeburn 5708: }
5709: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
5710:
5711: #
5712: # Checks if student photo is available for a user in the domain, in the user's
5713: # directory (in /userfiles/internal/studentphoto.jpg).
5714: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
5715: # the student's photo.
5716:
5717: sub photo_check_handler {
5718: my ($cmd, $tail, $client) = @_;
5719: my $userinput = "$cmd:$tail";
5720: my ($udom,$uname,$pid) = split(/:/,$tail);
5721: $udom = &unescape($udom);
5722: $uname = &unescape($uname);
5723: $pid = &unescape($pid);
5724: my $path=&propath($udom,$uname).'/userfiles/internal/';
5725: if (!-e $path) {
5726: &mkpath($path);
5727: }
5728: my $response;
5729: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
5730: $result .= ':'.$response;
5731: &Reply($client, &escape($result)."\n",$userinput);
1.320 albertel 5732: return 1;
1.317 raeburn 5733: }
5734: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
5735:
5736: #
5737: # Retrieve information from localenroll about whether to provide a button
5738: # for users who have enbled import of student photos to initiate an
5739: # update of photo files for registered students. Also include
5740: # comment to display alongside button.
5741:
5742: sub photo_choice_handler {
5743: my ($cmd, $tail, $client) = @_;
5744: my $userinput = "$cmd:$tail";
5745: my $cdom = &unescape($tail);
1.320 albertel 5746: my ($update,$comment);
5747: eval {
5748: local($SIG{__DIE__})='DEFAULT';
5749: ($update,$comment) = &localenroll::manager_photo_update($cdom);
5750: };
5751: if (!$@) {
5752: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
5753: } else {
5754: &Failure($client,"unknown_cmd\n",$userinput);
5755: }
5756: return 1;
1.317 raeburn 5757: }
5758: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
5759:
1.265 albertel 5760: #
5761: # Gets a student's photo to exist (in the correct image type) in the user's
5762: # directory.
5763: # Formal Parameters:
5764: # $cmd - The command request that got us dispatched.
5765: # $tail - A colon separated set of words that will be split into:
5766: # $domain - student's domain
5767: # $uname - student username
5768: # $type - image type desired
5769: # $client - The socket open on the client.
5770: # Returns:
5771: # 1 - continue processing.
1.317 raeburn 5772:
1.265 albertel 5773: sub student_photo_handler {
5774: my ($cmd, $tail, $client) = @_;
1.317 raeburn 5775: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265 albertel 5776:
1.317 raeburn 5777: my $path=&propath($domain,$uname). '/userfiles/internal/';
5778: my $filename = 'studentphoto.'.$ext;
5779: if ($type eq 'thumbnail') {
5780: $filename = 'studentphoto_tn.'.$ext;
5781: }
5782: if (-e $path.$filename) {
1.265 albertel 5783: &Reply($client,"ok\n","$cmd:$tail");
5784: return 1;
5785: }
5786: &mkpath($path);
1.317 raeburn 5787: my $file;
5788: if ($type eq 'thumbnail') {
1.320 albertel 5789: eval {
5790: local($SIG{__DIE__})='DEFAULT';
5791: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
5792: };
1.317 raeburn 5793: } else {
5794: $file=&localstudentphoto::fetch($domain,$uname);
5795: }
1.265 albertel 5796: if (!$file) {
5797: &Failure($client,"unavailable\n","$cmd:$tail");
5798: return 1;
5799: }
1.317 raeburn 5800: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
5801: if (-e $path.$filename) {
1.265 albertel 5802: &Reply($client,"ok\n","$cmd:$tail");
5803: return 1;
5804: }
5805: &Failure($client,"unable_to_convert\n","$cmd:$tail");
5806: return 1;
5807: }
5808: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 5809:
1.361 raeburn 5810: sub inst_usertypes_handler {
5811: my ($cmd, $domain, $client) = @_;
5812: my $res;
5813: my $userinput = $cmd.":".$domain; # For logging purposes.
1.370 albertel 5814: my (%typeshash,@order,$result);
5815: eval {
5816: local($SIG{__DIE__})='DEFAULT';
5817: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
5818: };
5819: if ($result eq 'ok') {
1.361 raeburn 5820: if (keys(%typeshash) > 0) {
5821: foreach my $key (keys(%typeshash)) {
5822: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
5823: }
5824: }
5825: $res=~s/\&$//;
5826: $res .= ':';
5827: if (@order > 0) {
5828: foreach my $item (@order) {
5829: $res .= &escape($item).'&';
5830: }
5831: }
5832: $res=~s/\&$//;
5833: }
1.387 albertel 5834: &Reply($client, \$res, $userinput);
1.361 raeburn 5835: return 1;
5836: }
5837: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
5838:
1.264 albertel 5839: # mkpath makes all directories for a file, expects an absolute path with a
5840: # file or a trailing / if just a dir is passed
5841: # returns 1 on success 0 on failure
5842: sub mkpath {
5843: my ($file)=@_;
5844: my @parts=split(/\//,$file,-1);
5845: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
5846: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 5847: $now.='/'.$parts[$i];
1.264 albertel 5848: if (!-e $now) {
5849: if (!mkdir($now,0770)) { return 0; }
5850: }
5851: }
5852: return 1;
5853: }
5854:
1.207 foxr 5855: #---------------------------------------------------------------
5856: #
5857: # Getting, decoding and dispatching requests:
5858: #
5859: #
5860: # Get a Request:
5861: # Gets a Request message from the client. The transaction
5862: # is defined as a 'line' of text. We remove the new line
5863: # from the text line.
1.226 foxr 5864: #
1.211 albertel 5865: sub get_request {
1.207 foxr 5866: my $input = <$client>;
5867: chomp($input);
1.226 foxr 5868:
1.234 foxr 5869: &Debug("get_request: Request = $input\n");
1.207 foxr 5870:
5871: &status('Processing '.$clientname.':'.$input);
5872:
5873: return $input;
5874: }
1.212 foxr 5875: #---------------------------------------------------------------
5876: #
5877: # Process a request. This sub should shrink as each action
5878: # gets farmed out into a separat sub that is registered
5879: # with the dispatch hash.
5880: #
5881: # Parameters:
5882: # user_input - The request received from the client (lonc).
5883: # Returns:
5884: # true to keep processing, false if caller should exit.
5885: #
5886: sub process_request {
5887: my ($userinput) = @_; # Easier for now to break style than to
5888: # fix all the userinput -> user_input.
5889: my $wasenc = 0; # True if request was encrypted.
5890: # ------------------------------------------------------------ See if encrypted
1.322 albertel 5891: # for command
5892: # sethost:<server>
5893: # <command>:<args>
5894: # we just send it to the processor
5895: # for
5896: # sethost:<server>:<command>:<args>
5897: # we do the implict set host and then do the command
5898: if ($userinput =~ /^sethost:/) {
5899: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
5900: if (defined($userinput)) {
5901: &sethost("$cmd:$newid");
5902: } else {
5903: $userinput = "$cmd:$newid";
5904: }
5905: }
5906:
1.212 foxr 5907: if ($userinput =~ /^enc/) {
5908: $userinput = decipher($userinput);
5909: $wasenc=1;
5910: if(!$userinput) { # Cipher not defined.
1.251 foxr 5911: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 5912: return 0;
5913: }
5914: }
5915: Debug("process_request: $userinput\n");
5916:
1.213 foxr 5917: #
5918: # The 'correct way' to add a command to lond is now to
5919: # write a sub to execute it and Add it to the command dispatch
5920: # hash via a call to register_handler.. The comments to that
5921: # sub should give you enough to go on to show how to do this
5922: # along with the examples that are building up as this code
5923: # is getting refactored. Until all branches of the
5924: # if/elseif monster below have been factored out into
5925: # separate procesor subs, if the dispatch hash is missing
5926: # the command keyword, we will fall through to the remainder
5927: # of the if/else chain below in order to keep this thing in
5928: # working order throughout the transmogrification.
5929:
5930: my ($command, $tail) = split(/:/, $userinput, 2);
5931: chomp($command);
5932: chomp($tail);
5933: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 5934: $command =~ s/(\r)//; # And this too for parameterless commands.
5935: if(!$tail) {
5936: $tail =""; # defined but blank.
5937: }
1.213 foxr 5938:
5939: &Debug("Command received: $command, encoded = $wasenc");
5940:
5941: if(defined $Dispatcher{$command}) {
5942:
5943: my $dispatch_info = $Dispatcher{$command};
5944: my $handler = $$dispatch_info[0];
5945: my $need_encode = $$dispatch_info[1];
5946: my $client_types = $$dispatch_info[2];
5947: Debug("Matched dispatch hash: mustencode: $need_encode "
5948: ."ClientType $client_types");
5949:
5950: # Validate the request:
5951:
5952: my $ok = 1;
5953: my $requesterprivs = 0;
5954: if(&isClient()) {
5955: $requesterprivs |= $CLIENT_OK;
5956: }
5957: if(&isManager()) {
5958: $requesterprivs |= $MANAGER_OK;
5959: }
5960: if($need_encode && (!$wasenc)) {
5961: Debug("Must encode but wasn't: $need_encode $wasenc");
5962: $ok = 0;
5963: }
5964: if(($client_types & $requesterprivs) == 0) {
5965: Debug("Client not privileged to do this operation");
5966: $ok = 0;
5967: }
5968:
5969: if($ok) {
5970: Debug("Dispatching to handler $command $tail");
5971: my $keep_going = &$handler($command, $tail, $client);
5972: return $keep_going;
5973: } else {
5974: Debug("Refusing to dispatch because client did not match requirements");
5975: Failure($client, "refused\n", $userinput);
5976: return 1;
5977: }
5978:
5979: }
5980:
1.262 foxr 5981: print $client "unknown_cmd\n";
1.212 foxr 5982: # -------------------------------------------------------------------- complete
5983: Debug("process_request - returning 1");
5984: return 1;
5985: }
1.207 foxr 5986: #
5987: # Decipher encoded traffic
5988: # Parameters:
5989: # input - Encoded data.
5990: # Returns:
5991: # Decoded data or undef if encryption key was not yet negotiated.
5992: # Implicit input:
5993: # cipher - This global holds the negotiated encryption key.
5994: #
1.211 albertel 5995: sub decipher {
1.207 foxr 5996: my ($input) = @_;
5997: my $output = '';
1.212 foxr 5998:
5999:
1.207 foxr 6000: if($cipher) {
6001: my($enc, $enclength, $encinput) = split(/:/, $input);
6002: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
6003: $output .=
6004: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
6005: }
6006: return substr($output, 0, $enclength);
6007: } else {
6008: return undef;
6009: }
6010: }
6011:
6012: #
6013: # Register a command processor. This function is invoked to register a sub
6014: # to process a request. Once registered, the ProcessRequest sub can automatically
6015: # dispatch requests to an appropriate sub, and do the top level validity checking
6016: # as well:
6017: # - Is the keyword recognized.
6018: # - Is the proper client type attempting the request.
6019: # - Is the request encrypted if it has to be.
6020: # Parameters:
6021: # $request_name - Name of the request being registered.
6022: # This is the command request that will match
6023: # against the hash keywords to lookup the information
6024: # associated with the dispatch information.
6025: # $procedure - Reference to a sub to call to process the request.
6026: # All subs get called as follows:
6027: # Procedure($cmd, $tail, $replyfd, $key)
6028: # $cmd - the actual keyword that invoked us.
6029: # $tail - the tail of the request that invoked us.
6030: # $replyfd- File descriptor connected to the client
6031: # $must_encode - True if the request must be encoded to be good.
6032: # $client_ok - True if it's ok for a client to request this.
6033: # $manager_ok - True if it's ok for a manager to request this.
6034: # Side effects:
6035: # - On success, the Dispatcher hash has an entry added for the key $RequestName
6036: # - On failure, the program will die as it's a bad internal bug to try to
6037: # register a duplicate command handler.
6038: #
1.211 albertel 6039: sub register_handler {
1.212 foxr 6040: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 6041:
6042: # Don't allow duplication#
6043:
6044: if (defined $Dispatcher{$request_name}) {
6045: die "Attempting to define a duplicate request handler for $request_name\n";
6046: }
6047: # Build the client type mask:
6048:
6049: my $client_type_mask = 0;
6050: if($client_ok) {
6051: $client_type_mask |= $CLIENT_OK;
6052: }
6053: if($manager_ok) {
6054: $client_type_mask |= $MANAGER_OK;
6055: }
6056:
6057: # Enter the hash:
6058:
6059: my @entry = ($procedure, $must_encode, $client_type_mask);
6060:
6061: $Dispatcher{$request_name} = \@entry;
6062:
6063: }
6064:
6065:
6066: #------------------------------------------------------------------
6067:
6068:
6069:
6070:
1.141 foxr 6071: #
1.96 foxr 6072: # Convert an error return code from lcpasswd to a string value.
6073: #
6074: sub lcpasswdstrerror {
6075: my $ErrorCode = shift;
1.97 foxr 6076: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 6077: return "lcpasswd Unrecognized error return value ".$ErrorCode;
6078: } else {
1.98 foxr 6079: return $passwderrors[$ErrorCode];
1.96 foxr 6080: }
6081: }
6082:
1.97 foxr 6083: #
6084: # Convert an error return code from lcuseradd to a string value:
6085: #
6086: sub lcuseraddstrerror {
6087: my $ErrorCode = shift;
6088: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
6089: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
6090: } else {
1.98 foxr 6091: return $adderrors[$ErrorCode];
1.97 foxr 6092: }
6093: }
6094:
1.23 harris41 6095: # grabs exception and records it to log before exiting
6096: sub catchexception {
1.27 albertel 6097: my ($error)=@_;
1.25 www 6098: $SIG{'QUIT'}='DEFAULT';
6099: $SIG{__DIE__}='DEFAULT';
1.165 albertel 6100: &status("Catching exception");
1.190 albertel 6101: &logthis("<font color='red'>CRITICAL: "
1.373 albertel 6102: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
1.27 albertel 6103: ."a crash with this error msg->[$error]</font>");
1.57 www 6104: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 6105: if ($client) { print $client "error: $error\n"; }
1.59 www 6106: $server->close();
1.27 albertel 6107: die($error);
1.23 harris41 6108: }
1.63 www 6109: sub timeout {
1.165 albertel 6110: &status("Handling Timeout");
1.190 albertel 6111: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 6112: &catchexception('Timeout');
6113: }
1.22 harris41 6114: # -------------------------------- Set signal handlers to record abnormal exits
6115:
1.226 foxr 6116:
1.22 harris41 6117: $SIG{'QUIT'}=\&catchexception;
6118: $SIG{__DIE__}=\&catchexception;
6119:
1.81 matthew 6120: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 6121: &status("Read loncapa.conf and loncapa_apache.conf");
6122: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 6123: %perlvar=%{$perlvarref};
1.80 harris41 6124: undef $perlvarref;
1.19 www 6125:
1.35 harris41 6126: # ----------------------------- Make sure this process is running from user=www
6127: my $wwwid=getpwnam('www');
6128: if ($wwwid!=$<) {
1.134 albertel 6129: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6130: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 6131: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 6132: mailto $emailto -s '$subj' > /dev/null");
6133: exit 1;
6134: }
6135:
1.19 www 6136: # --------------------------------------------- Check if other instance running
6137:
6138: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6139:
6140: if (-e $pidfile) {
6141: my $lfh=IO::File->new("$pidfile");
6142: my $pide=<$lfh>;
6143: chomp($pide);
1.29 harris41 6144: if (kill 0 => $pide) { die "already running"; }
1.19 www 6145: }
1.1 albertel 6146:
6147: # ------------------------------------------------------------- Read hosts file
6148:
6149:
6150:
6151: # establish SERVER socket, bind and listen.
6152: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6153: Type => SOCK_STREAM,
6154: Proto => 'tcp',
1.469 foxr 6155: ReuseAddr => 1,
1.1 albertel 6156: Listen => 10 )
1.29 harris41 6157: or die "making socket: $@\n";
1.1 albertel 6158:
6159: # --------------------------------------------------------- Do global variables
6160:
6161: # global variables
6162:
1.134 albertel 6163: my %children = (); # keys are current child process IDs
1.1 albertel 6164:
6165: sub REAPER { # takes care of dead children
6166: $SIG{CHLD} = \&REAPER;
1.165 albertel 6167: &status("Handling child death");
1.178 foxr 6168: my $pid;
6169: do {
6170: $pid = waitpid(-1,&WNOHANG());
6171: if (defined($children{$pid})) {
6172: &logthis("Child $pid died");
6173: delete($children{$pid});
1.183 albertel 6174: } elsif ($pid > 0) {
1.178 foxr 6175: &logthis("Unknown Child $pid died");
6176: }
6177: } while ( $pid > 0 );
6178: foreach my $child (keys(%children)) {
6179: $pid = waitpid($child,&WNOHANG());
6180: if ($pid > 0) {
6181: &logthis("Child $child - $pid looks like we missed it's death");
6182: delete($children{$pid});
6183: }
1.176 albertel 6184: }
1.165 albertel 6185: &status("Finished Handling child death");
1.1 albertel 6186: }
6187:
6188: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 6189: &status("Killing children (INT)");
1.1 albertel 6190: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6191: kill 'INT' => keys %children;
1.59 www 6192: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 6193: my $execdir=$perlvar{'lonDaemons'};
6194: unlink("$execdir/logs/lond.pid");
1.190 albertel 6195: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 6196: &status("Done killing children");
1.1 albertel 6197: exit; # clean up with dignity
6198: }
6199:
6200: sub HUPSMAN { # signal handler for SIGHUP
6201: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 6202: &status("Killing children for restart (HUP)");
1.1 albertel 6203: kill 'INT' => keys %children;
1.59 www 6204: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 6205: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 6206: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 6207: unlink("$execdir/logs/lond.pid");
1.165 albertel 6208: &status("Restarting self (HUP)");
1.1 albertel 6209: exec("$execdir/lond"); # here we go again
6210: }
6211:
1.144 foxr 6212: #
1.148 foxr 6213: # Reload the Apache daemon's state.
1.150 foxr 6214: # This is done by invoking /home/httpd/perl/apachereload
6215: # a setuid perl script that can be root for us to do this job.
1.148 foxr 6216: #
6217: sub ReloadApache {
1.473 raeburn 6218: # --------------------------- Handle case of another apachereload process (locking)
1.474 raeburn 6219: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6220: my $execdir = $perlvar{'lonDaemons'};
6221: my $script = $execdir."/apachereload";
6222: system($script);
6223: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6224: }
1.148 foxr 6225: }
6226:
6227: #
1.144 foxr 6228: # Called in response to a USR2 signal.
6229: # - Reread hosts.tab
6230: # - All children connected to hosts that were removed from hosts.tab
6231: # are killed via SIGINT
6232: # - All children connected to previously existing hosts are sent SIGUSR1
6233: # - Our internal hosts hash is updated to reflect the new contents of
6234: # hosts.tab causing connections from hosts added to hosts.tab to
6235: # now be honored.
6236: #
6237: sub UpdateHosts {
1.165 albertel 6238: &status("Reload hosts.tab");
1.147 foxr 6239: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 6240: #
6241: # The %children hash has the set of IP's we currently have children
6242: # on. These need to be matched against records in the hosts.tab
6243: # Any ip's no longer in the table get killed off they correspond to
6244: # either dropped or changed hosts. Note that the re-read of the table
6245: # will take care of new and changed hosts as connections come into being.
6246:
1.371 albertel 6247: &Apache::lonnet::reset_hosts_info();
1.148 foxr 6248:
1.368 albertel 6249: foreach my $child (keys(%children)) {
1.148 foxr 6250: my $childip = $children{$child};
1.374 albertel 6251: if ($childip ne '127.0.0.1'
6252: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
1.149 foxr 6253: logthis('<font color="blue"> UpdateHosts killing child '
6254: ." $child for ip $childip </font>");
1.148 foxr 6255: kill('INT', $child);
1.149 foxr 6256: } else {
6257: logthis('<font color="green"> keeping child for ip '
6258: ." $childip (pid=$child) </font>");
1.148 foxr 6259: }
6260: }
6261: ReloadApache;
1.165 albertel 6262: &status("Finished reloading hosts.tab");
1.144 foxr 6263: }
6264:
1.148 foxr 6265:
1.57 www 6266: sub checkchildren {
1.165 albertel 6267: &status("Checking on the children (sending signals)");
1.57 www 6268: &initnewstatus();
6269: &logstatus();
6270: &logthis('Going to check on the children');
1.134 albertel 6271: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 6272: foreach (sort keys %children) {
1.221 albertel 6273: #sleep 1;
1.57 www 6274: unless (kill 'USR1' => $_) {
6275: &logthis ('Child '.$_.' is dead');
6276: &logstatus($$.' is dead');
1.221 albertel 6277: delete($children{$_});
1.57 www 6278: }
1.61 harris41 6279: }
1.63 www 6280: sleep 5;
1.212 foxr 6281: $SIG{ALRM} = sub { Debug("timeout");
6282: die "timeout"; };
1.113 albertel 6283: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 6284: &status("Checking on the children (waiting for reports)");
1.63 www 6285: foreach (sort keys %children) {
6286: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 6287: eval {
6288: alarm(300);
1.63 www 6289: &logthis('Child '.$_.' did not respond');
1.67 albertel 6290: kill 9 => $_;
1.131 albertel 6291: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6292: #$subj="LON: $currenthostid killed lond process $_";
6293: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6294: #$execdir=$perlvar{'lonDaemons'};
6295: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 6296: delete($children{$_});
1.113 albertel 6297: alarm(0);
6298: }
1.63 www 6299: }
6300: }
1.113 albertel 6301: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 6302: $SIG{__DIE__} = \&catchexception;
1.165 albertel 6303: &status("Finished checking children");
1.221 albertel 6304: &logthis('Finished Checking children');
1.57 www 6305: }
6306:
1.1 albertel 6307: # --------------------------------------------------------------------- Logging
6308:
6309: sub logthis {
6310: my $message=shift;
6311: my $execdir=$perlvar{'lonDaemons'};
6312: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6313: my $now=time;
6314: my $local=localtime($now);
1.58 www 6315: $lastlog=$local.': '.$message;
1.1 albertel 6316: print $fh "$local ($$): $message\n";
6317: }
6318:
1.77 foxr 6319: # ------------------------- Conditional log if $DEBUG true.
6320: sub Debug {
6321: my $message = shift;
6322: if($DEBUG) {
6323: &logthis($message);
6324: }
6325: }
1.161 foxr 6326:
6327: #
6328: # Sub to do replies to client.. this gives a hook for some
6329: # debug tracing too:
6330: # Parameters:
6331: # fd - File open on client.
6332: # reply - Text to send to client.
6333: # request - Original request from client.
6334: #
6335: sub Reply {
1.192 foxr 6336: my ($fd, $reply, $request) = @_;
1.387 albertel 6337: if (ref($reply)) {
6338: print $fd $$reply;
6339: print $fd "\n";
6340: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6341: } else {
6342: print $fd $reply;
6343: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6344: }
1.212 foxr 6345: $Transactions++;
6346: }
6347:
6348:
6349: #
6350: # Sub to report a failure.
6351: # This function:
6352: # - Increments the failure statistic counters.
6353: # - Invokes Reply to send the error message to the client.
6354: # Parameters:
6355: # fd - File descriptor open on the client
6356: # reply - Reply text to emit.
6357: # request - The original request message (used by Reply
6358: # to debug if that's enabled.
6359: # Implicit outputs:
6360: # $Failures- The number of failures is incremented.
6361: # Reply (invoked here) sends a message to the
6362: # client:
6363: #
6364: sub Failure {
6365: my $fd = shift;
6366: my $reply = shift;
6367: my $request = shift;
6368:
6369: $Failures++;
6370: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 6371: }
1.57 www 6372: # ------------------------------------------------------------------ Log status
6373:
6374: sub logstatus {
1.178 foxr 6375: &status("Doing logging");
6376: my $docdir=$perlvar{'lonDocRoot'};
6377: {
6378: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 6379: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 6380: $fh->close();
6381: }
1.221 albertel 6382: &status("Finished $$.txt");
6383: {
6384: open(LOG,">>$docdir/lon-status/londstatus.txt");
6385: flock(LOG,LOCK_EX);
6386: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6387: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 6388: flock(LOG,LOCK_UN);
1.221 albertel 6389: close(LOG);
6390: }
1.178 foxr 6391: &status("Finished logging");
1.57 www 6392: }
6393:
6394: sub initnewstatus {
6395: my $docdir=$perlvar{'lonDocRoot'};
6396: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
1.460 foxr 6397: my $now=time();
1.57 www 6398: my $local=localtime($now);
6399: print $fh "LOND status $local - parent $$\n\n";
1.64 www 6400: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 6401: while (my $filename=readdir(DIR)) {
1.64 www 6402: unlink("$docdir/lon-status/londchld/$filename");
6403: }
6404: closedir(DIR);
1.57 www 6405: }
6406:
6407: # -------------------------------------------------------------- Status setting
6408:
6409: sub status {
6410: my $what=shift;
6411: my $now=time;
6412: my $local=localtime($now);
1.178 foxr 6413: $status=$local.': '.$what;
6414: $0='lond: '.$what.' '.$local;
1.57 www 6415: }
1.11 www 6416:
1.13 www 6417: # -------------------------------------------------------------- Talk to lonsql
6418:
1.234 foxr 6419: sub sql_reply {
1.12 harris41 6420: my ($cmd)=@_;
1.234 foxr 6421: my $answer=&sub_sql_reply($cmd);
6422: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 6423: return $answer;
6424: }
6425:
1.234 foxr 6426: sub sub_sql_reply {
1.12 harris41 6427: my ($cmd)=@_;
6428: my $unixsock="mysqlsock";
6429: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6430: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6431: Type => SOCK_STREAM,
6432: Timeout => 10)
6433: or return "con_lost";
1.319 www 6434: print $sclient "$cmd:$currentdomainid\n";
1.12 harris41 6435: my $answer=<$sclient>;
6436: chomp($answer);
6437: if (!$answer) { $answer="con_lost"; }
6438: return $answer;
6439: }
6440:
1.1 albertel 6441: # --------------------------------------- Is this the home server of an author?
1.11 www 6442:
1.1 albertel 6443: sub ishome {
6444: my $author=shift;
6445: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6446: my ($udom,$uname)=split(/\//,$author);
6447: my $proname=propath($udom,$uname);
6448: if (-e $proname) {
6449: return 'owner';
6450: } else {
6451: return 'not_owner';
6452: }
6453: }
6454:
6455: # ======================================================= Continue main program
6456: # ---------------------------------------------------- Fork once and dissociate
6457:
1.134 albertel 6458: my $fpid=fork;
1.1 albertel 6459: exit if $fpid;
1.29 harris41 6460: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 6461:
1.29 harris41 6462: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 6463:
6464: # ------------------------------------------------------- Write our PID on disk
6465:
1.134 albertel 6466: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 6467: open (PIDSAVE,">$execdir/logs/lond.pid");
6468: print PIDSAVE "$$\n";
6469: close(PIDSAVE);
1.190 albertel 6470: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 6471: &status('Starting');
1.1 albertel 6472:
1.106 foxr 6473:
1.1 albertel 6474:
6475: # ----------------------------------------------------- Install signal handlers
6476:
1.57 www 6477:
1.1 albertel 6478: $SIG{CHLD} = \&REAPER;
6479: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6480: $SIG{HUP} = \&HUPSMAN;
1.57 www 6481: $SIG{USR1} = \&checkchildren;
1.144 foxr 6482: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 6483:
1.148 foxr 6484: # Read the host hashes:
1.368 albertel 6485: &Apache::lonnet::load_hosts_tab();
1.447 raeburn 6486: my %iphost = &Apache::lonnet::get_iphost(1);
1.106 foxr 6487:
1.480 raeburn 6488: $dist=`$perlvar{'lonDaemons'}/distprobe`;
1.286 albertel 6489:
1.471 raeburn 6490: my $arch = `uname -i`;
1.475 raeburn 6491: chomp($arch);
1.471 raeburn 6492: if ($arch eq 'unknown') {
6493: $arch = `uname -m`;
1.475 raeburn 6494: chomp($arch);
1.471 raeburn 6495: }
6496:
1.106 foxr 6497: # --------------------------------------------------------------
6498: # Accept connections. When a connection comes in, it is validated
6499: # and if good, a child process is created to process transactions
6500: # along the connection.
6501:
1.1 albertel 6502: while (1) {
1.165 albertel 6503: &status('Starting accept');
1.106 foxr 6504: $client = $server->accept() or next;
1.165 albertel 6505: &status('Accepted '.$client.' off to spawn');
1.386 albertel 6506: make_new_child($client);
1.165 albertel 6507: &status('Finished spawning');
1.1 albertel 6508: }
6509:
1.212 foxr 6510: sub make_new_child {
6511: my $pid;
6512: # my $cipher; # Now global
6513: my $sigset;
1.178 foxr 6514:
1.212 foxr 6515: $client = shift;
6516: &status('Starting new child '.$client);
6517: &logthis('<font color="green"> Attempting to start child ('.$client.
6518: ")</font>");
6519: # block signal for fork
6520: $sigset = POSIX::SigSet->new(SIGINT);
6521: sigprocmask(SIG_BLOCK, $sigset)
6522: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 6523:
1.212 foxr 6524: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 6525:
1.212 foxr 6526: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6527: # connection liveness.
1.178 foxr 6528:
1.212 foxr 6529: #
6530: # Figure out who we're talking to so we can record the peer in
6531: # the pid hash.
6532: #
6533: my $caller = getpeername($client);
6534: my ($port,$iaddr);
6535: if (defined($caller) && length($caller) > 0) {
6536: ($port,$iaddr)=unpack_sockaddr_in($caller);
6537: } else {
6538: &logthis("Unable to determine who caller was, getpeername returned nothing");
6539: }
6540: if (defined($iaddr)) {
6541: $clientip = inet_ntoa($iaddr);
6542: Debug("Connected with $clientip");
6543: } else {
6544: &logthis("Unable to determine clientip");
6545: $clientip='Unavailable';
6546: }
6547:
6548: if ($pid) {
6549: # Parent records the child's birth and returns.
6550: sigprocmask(SIG_UNBLOCK, $sigset)
6551: or die "Can't unblock SIGINT for fork: $!\n";
6552: $children{$pid} = $clientip;
6553: &status('Started child '.$pid);
1.462 foxr 6554: close($client);
1.212 foxr 6555: return;
6556: } else {
6557: # Child can *not* return from this subroutine.
6558: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
6559: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
6560: #don't get intercepted
6561: $SIG{USR1}= \&logstatus;
6562: $SIG{ALRM}= \&timeout;
1.468 foxr 6563: #
6564: # Block sigpipe as it gets thrownon socket disconnect and we want to
6565: # deal with that as a read faiure instead.
6566: #
6567: my $blockset = POSIX::SigSet->new(SIGPIPE);
6568: sigprocmask(SIG_BLOCK, $blockset);
6569:
1.212 foxr 6570: $lastlog='Forked ';
6571: $status='Forked';
1.178 foxr 6572:
1.212 foxr 6573: # unblock signals
6574: sigprocmask(SIG_UNBLOCK, $sigset)
6575: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 6576:
1.212 foxr 6577: # my $tmpsnum=0; # Now global
6578: #---------------------------------------------------- kerberos 5 initialization
6579: &Authen::Krb5::init_context();
1.359 raeburn 6580: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
1.489.2.2 raeburn 6581: ($dist eq 'fedora6') || ($dist eq 'suse9.3') ||
6582: ($dist eq 'suse12.2')) {
1.286 albertel 6583: &Authen::Krb5::init_ets();
6584: }
1.209 albertel 6585:
1.212 foxr 6586: &status('Accepted connection');
6587: # =============================================================================
6588: # do something with the connection
6589: # -----------------------------------------------------------------------------
6590: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 6591:
1.278 albertel 6592: my $outsideip=$clientip;
6593: if ($clientip eq '127.0.0.1') {
1.368 albertel 6594: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
1.278 albertel 6595: }
1.412 foxr 6596: &ReadManagerTable();
1.368 albertel 6597: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
1.278 albertel 6598: my $ismanager=($managers{$outsideip} ne undef);
1.432 raeburn 6599: $clientname = "[unknown]";
1.212 foxr 6600: if($clientrec) { # Establish client type.
6601: $ConnectionType = "client";
1.368 albertel 6602: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
1.212 foxr 6603: if($ismanager) {
6604: $ConnectionType = "both";
6605: }
6606: } else {
6607: $ConnectionType = "manager";
1.278 albertel 6608: $clientname = $managers{$outsideip};
1.212 foxr 6609: }
6610: my $clientok;
1.178 foxr 6611:
1.212 foxr 6612: if ($clientrec || $ismanager) {
6613: &status("Waiting for init from $clientip $clientname");
6614: &logthis('<font color="yellow">INFO: Connection, '.
6615: $clientip.
6616: " ($clientname) connection type = $ConnectionType </font>" );
6617: &status("Connecting $clientip ($clientname))");
6618: my $remotereq=<$client>;
6619: chomp($remotereq);
6620: Debug("Got init: $remotereq");
1.337 albertel 6621:
1.212 foxr 6622: if ($remotereq =~ /^init/) {
6623: &sethost("sethost:$perlvar{'lonHostID'}");
6624: #
6625: # If the remote is attempting a local init... give that a try:
6626: #
1.432 raeburn 6627: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
1.209 albertel 6628:
1.212 foxr 6629: # If the connection type is ssl, but I didn't get my
6630: # certificate files yet, then I'll drop back to
6631: # insecure (if allowed).
6632:
6633: if($inittype eq "ssl") {
6634: my ($ca, $cert) = lonssl::CertificateFile;
6635: my $kfile = lonssl::KeyFile;
6636: if((!$ca) ||
6637: (!$cert) ||
6638: (!$kfile)) {
6639: $inittype = ""; # This forces insecure attempt.
6640: &logthis("<font color=\"blue\"> Certificates not "
6641: ."installed -- trying insecure auth</font>");
1.224 foxr 6642: } else { # SSL certificates are in place so
1.212 foxr 6643: } # Leave the inittype alone.
6644: }
6645:
6646: if($inittype eq "local") {
1.432 raeburn 6647: $clientversion = $perlvar{'lonVersion'};
1.212 foxr 6648: my $key = LocalConnection($client, $remotereq);
6649: if($key) {
6650: Debug("Got local key $key");
6651: $clientok = 1;
6652: my $cipherkey = pack("H32", $key);
6653: $cipher = new IDEA($cipherkey);
6654: print $client "ok:local\n";
1.442 www 6655: &logthis('<font color="green">'
1.212 foxr 6656: . "Successful local authentication </font>");
6657: $keymode = "local"
1.178 foxr 6658: } else {
1.212 foxr 6659: Debug("Failed to get local key");
6660: $clientok = 0;
6661: shutdown($client, 3);
6662: close $client;
1.178 foxr 6663: }
1.212 foxr 6664: } elsif ($inittype eq "ssl") {
6665: my $key = SSLConnection($client);
6666: if ($key) {
6667: $clientok = 1;
6668: my $cipherkey = pack("H32", $key);
6669: $cipher = new IDEA($cipherkey);
6670: &logthis('<font color="green">'
6671: ."Successfull ssl authentication with $clientname </font>");
6672: $keymode = "ssl";
6673:
1.178 foxr 6674: } else {
1.212 foxr 6675: $clientok = 0;
6676: close $client;
1.178 foxr 6677: }
1.212 foxr 6678:
6679: } else {
6680: my $ok = InsecureConnection($client);
6681: if($ok) {
6682: $clientok = 1;
6683: &logthis('<font color="green">'
6684: ."Successful insecure authentication with $clientname </font>");
6685: print $client "ok\n";
6686: $keymode = "insecure";
1.178 foxr 6687: } else {
1.212 foxr 6688: &logthis('<font color="yellow">'
6689: ."Attempted insecure connection disallowed </font>");
6690: close $client;
6691: $clientok = 0;
1.178 foxr 6692:
6693: }
6694: }
1.212 foxr 6695: } else {
6696: &logthis(
6697: "<font color='blue'>WARNING: "
6698: ."$clientip failed to initialize: >$remotereq< </font>");
6699: &status('No init '.$clientip);
6700: }
6701:
6702: } else {
6703: &logthis(
6704: "<font color='blue'>WARNING: Unknown client $clientip</font>");
6705: &status('Hung up on '.$clientip);
6706: }
6707:
6708: if ($clientok) {
6709: # ---------------- New known client connecting, could mean machine online again
1.368 albertel 6710: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
1.367 albertel 6711: && $clientip ne '127.0.0.1') {
1.375 albertel 6712: &Apache::lonnet::reconlonc($clientname);
1.212 foxr 6713: }
6714: &logthis("<font color='green'>Established connection: $clientname</font>");
6715: &status('Will listen to '.$clientname);
6716: # ------------------------------------------------------------ Process requests
6717: my $keep_going = 1;
6718: my $user_input;
1.448 raeburn 6719: my $clienthost = &Apache::lonnet::hostname($clientname);
6720: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
6721: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
1.212 foxr 6722: while(($user_input = get_request) && $keep_going) {
6723: alarm(120);
6724: Debug("Main: Got $user_input\n");
6725: $keep_going = &process_request($user_input);
1.178 foxr 6726: alarm(0);
1.212 foxr 6727: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 6728: }
1.212 foxr 6729:
1.59 www 6730: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 6731: } else {
1.161 foxr 6732: print $client "refused\n";
6733: $client->close();
1.190 albertel 6734: &logthis("<font color='blue'>WARNING: "
1.161 foxr 6735: ."Rejected client $clientip, closing connection</font>");
6736: }
1.212 foxr 6737: }
1.161 foxr 6738:
1.1 albertel 6739: # =============================================================================
1.161 foxr 6740:
1.190 albertel 6741: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 6742: ."Disconnect from $clientip ($clientname)</font>");
6743:
6744:
6745: # this exit is VERY important, otherwise the child will become
6746: # a producer of more and more children, forking yourself into
6747: # process death.
6748: exit;
1.106 foxr 6749:
1.78 foxr 6750: }
1.261 foxr 6751: #
6752: # Determine if a user is an author for the indicated domain.
6753: #
6754: # Parameters:
6755: # domain - domain to check in .
6756: # user - Name of user to check.
6757: #
6758: # Return:
6759: # 1 - User is an author for domain.
6760: # 0 - User is not an author for domain.
6761: sub is_author {
6762: my ($domain, $user) = @_;
6763:
6764: &Debug("is_author: $user @ $domain");
6765:
6766: my $hashref = &tie_user_hash($domain, $user, "roles",
6767: &GDBM_READER());
6768:
6769: # Author role should show up as a key /domain/_au
1.78 foxr 6770:
1.321 albertel 6771: my $value;
1.487 foxr 6772: if ($hashref) {
1.78 foxr 6773:
1.487 foxr 6774: my $key = "/$domain/_au";
6775: if (defined($hashref)) {
6776: $value = $hashref->{$key};
6777: if(!untie_user_hash($hashref)) {
6778: return 'error: ' . ($!+0)." untie (GDBM) Failed";
6779: }
6780: }
6781:
6782: if(defined($value)) {
6783: &Debug("$user @ $domain is an author");
6784: }
6785: } else {
6786: return 'error: '.($!+0)." tie (GDBM) Failed";
1.261 foxr 6787: }
6788:
6789: return defined($value);
6790: }
1.78 foxr 6791: #
6792: # Checks to see if the input roleput request was to set
1.482 www 6793: # an author role. If so, creates construction space
1.78 foxr 6794: # Parameters:
6795: # request - The request sent to the rolesput subchunk.
6796: # We're looking for /domain/_au
6797: # domain - The domain in which the user is having roles doctored.
6798: # user - Name of the user for which the role is being put.
6799: # authtype - The authentication type associated with the user.
6800: #
1.289 albertel 6801: sub manage_permissions {
1.192 foxr 6802: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 6803: # See if the request is of the form /$domain/_au
1.289 albertel 6804: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.484 raeburn 6805: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
1.482 www 6806: unless (-e $path) {
6807: mkdir($path);
6808: }
6809: unless (-e $path.'/'.$user) {
6810: mkdir($path.'/'.$user);
6811: }
1.78 foxr 6812: }
6813: }
1.222 foxr 6814:
6815:
6816: #
6817: # Return the full path of a user password file, whether it exists or not.
6818: # Parameters:
6819: # domain - Domain in which the password file lives.
6820: # user - name of the user.
6821: # Returns:
6822: # Full passwd path:
6823: #
6824: sub password_path {
6825: my ($domain, $user) = @_;
1.264 albertel 6826: return &propath($domain, $user).'/passwd';
1.222 foxr 6827: }
6828:
6829: # Password Filename
6830: # Returns the path to a passwd file given domain and user... only if
6831: # it exists.
6832: # Parameters:
6833: # domain - Domain in which to search.
6834: # user - username.
6835: # Returns:
6836: # - If the password file exists returns its path.
6837: # - If the password file does not exist, returns undefined.
6838: #
6839: sub password_filename {
6840: my ($domain, $user) = @_;
6841:
6842: Debug ("PasswordFilename called: dom = $domain user = $user");
6843:
6844: my $path = &password_path($domain, $user);
6845: Debug("PasswordFilename got path: $path");
6846: if(-e $path) {
6847: return $path;
6848: } else {
6849: return undef;
6850: }
6851: }
6852:
6853: #
6854: # Rewrite the contents of the user's passwd file.
6855: # Parameters:
6856: # domain - domain of the user.
6857: # name - User's name.
6858: # contents - New contents of the file.
6859: # Returns:
6860: # 0 - Failed.
6861: # 1 - Success.
6862: #
6863: sub rewrite_password_file {
6864: my ($domain, $user, $contents) = @_;
6865:
6866: my $file = &password_filename($domain, $user);
6867: if (defined $file) {
6868: my $pf = IO::File->new(">$file");
6869: if($pf) {
6870: print $pf "$contents\n";
6871: return 1;
6872: } else {
6873: return 0;
6874: }
6875: } else {
6876: return 0;
6877: }
6878:
6879: }
6880:
1.78 foxr 6881: #
1.222 foxr 6882: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 6883:
6884: # Returns the authorization type or nouser if there is no such user.
6885: #
1.436 raeburn 6886: sub get_auth_type {
1.192 foxr 6887: my ($domain, $user) = @_;
1.78 foxr 6888:
1.222 foxr 6889: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 6890: my $proname = &propath($domain, $user);
6891: my $passwdfile = "$proname/passwd";
6892: if( -e $passwdfile ) {
6893: my $pf = IO::File->new($passwdfile);
6894: my $realpassword = <$pf>;
6895: chomp($realpassword);
1.79 foxr 6896: Debug("Password info = $realpassword\n");
1.78 foxr 6897: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 6898: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 6899: return "$authtype:$contentpwd";
1.224 foxr 6900: } else {
1.79 foxr 6901: Debug("Returning nouser");
1.78 foxr 6902: return "nouser";
6903: }
1.1 albertel 6904: }
6905:
1.220 foxr 6906: #
6907: # Validate a user given their domain, name and password. This utility
6908: # function is used by both AuthenticateHandler and ChangePasswordHandler
6909: # to validate the login credentials of a user.
6910: # Parameters:
6911: # $domain - The domain being logged into (this is required due to
6912: # the capability for multihomed systems.
6913: # $user - The name of the user being validated.
6914: # $password - The user's propoposed password.
6915: #
6916: # Returns:
6917: # 1 - The domain,user,pasword triplet corresponds to a valid
6918: # user.
6919: # 0 - The domain,user,password triplet is not a valid user.
6920: #
6921: sub validate_user {
1.396 raeburn 6922: my ($domain, $user, $password, $checkdefauth) = @_;
1.220 foxr 6923:
6924: # Why negative ~pi you may well ask? Well this function is about
6925: # authentication, and therefore very important to get right.
6926: # I've initialized the flag that determines whether or not I've
6927: # validated correctly to a value it's not supposed to get.
6928: # At the end of this function. I'll ensure that it's not still that
6929: # value so we don't just wind up returning some accidental value
6930: # as a result of executing an unforseen code path that
1.249 foxr 6931: # did not set $validated. At the end of valid execution paths,
6932: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 6933:
6934: my $validated = -3.14159;
6935:
6936: # How we authenticate is determined by the type of authentication
6937: # the user has been assigned. If the authentication type is
6938: # "nouser", the user does not exist so we will return 0.
6939:
1.222 foxr 6940: my $contents = &get_auth_type($domain, $user);
1.220 foxr 6941: my ($howpwd, $contentpwd) = split(/:/, $contents);
6942:
6943: my $null = pack("C",0); # Used by kerberos auth types.
6944:
1.395 raeburn 6945: if ($howpwd eq 'nouser') {
1.396 raeburn 6946: if ($checkdefauth) {
6947: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
6948: if ($domdefaults{'auth_def'} eq 'localauth') {
6949: $howpwd = $domdefaults{'auth_def'};
6950: $contentpwd = $domdefaults{'auth_arg_def'};
6951: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
6952: ($domdefaults{'auth_def'} eq 'krb5')) &&
6953: ($domdefaults{'auth_arg_def'} ne '')) {
6954: $howpwd = $domdefaults{'auth_def'};
6955: $contentpwd = $domdefaults{'auth_arg_def'};
6956: }
1.395 raeburn 6957: }
6958: }
1.220 foxr 6959: if ($howpwd ne 'nouser') {
6960: if($howpwd eq "internal") { # Encrypted is in local password file.
6961: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6962: }
6963: elsif ($howpwd eq "unix") { # User is a normal unix user.
6964: $contentpwd = (getpwnam($user))[1];
6965: if($contentpwd) {
6966: if($contentpwd eq 'x') { # Shadow password file...
6967: my $pwauth_path = "/usr/local/sbin/pwauth";
6968: open PWAUTH, "|$pwauth_path" or
6969: die "Cannot invoke authentication";
6970: print PWAUTH "$user\n$password\n";
6971: close PWAUTH;
6972: $validated = ! $?;
6973:
6974: } else { # Passwords in /etc/passwd.
6975: $validated = (crypt($password,
6976: $contentpwd) eq $contentpwd);
6977: }
6978: } else {
6979: $validated = 0;
6980: }
1.439 raeburn 6981: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6982: my $checkwithkrb5 = 0;
6983: if ($dist =~/^fedora(\d+)$/) {
6984: if ($1 > 11) {
6985: $checkwithkrb5 = 1;
6986: }
6987: } elsif ($dist =~ /^suse([\d.]+)$/) {
6988: if ($1 > 11.1) {
6989: $checkwithkrb5 = 1;
6990: }
6991: }
6992: if ($checkwithkrb5) {
6993: $validated = &krb5_authen($password,$null,$user,$contentpwd);
6994: } else {
6995: $validated = &krb4_authen($password,$null,$user,$contentpwd);
6996: }
1.224 foxr 6997: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.439 raeburn 6998: $validated = &krb5_authen($password,$null,$user,$contentpwd);
1.224 foxr 6999: } elsif ($howpwd eq "localauth") {
1.220 foxr 7000: # Authenticate via installation specific authentcation method:
7001: $validated = &localauth::localauth($user,
7002: $password,
1.353 albertel 7003: $contentpwd,
7004: $domain);
1.358 albertel 7005: if ($validated < 0) {
1.357 albertel 7006: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
7007: $validated = 0;
7008: }
1.224 foxr 7009: } else { # Unrecognized auth is also bad.
1.220 foxr 7010: $validated = 0;
7011: }
7012: } else {
7013: $validated = 0;
7014: }
7015: #
7016: # $validated has the correct stat of the authentication:
7017: #
7018:
7019: unless ($validated != -3.14159) {
1.249 foxr 7020: # I >really really< want to know if this happens.
7021: # since it indicates that user authentication is badly
7022: # broken in some code path.
7023: #
7024: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 7025: }
7026: return $validated;
7027: }
7028:
1.439 raeburn 7029: sub krb4_authen {
7030: my ($password,$null,$user,$contentpwd) = @_;
7031: my $validated = 0;
7032: if (!($password =~ /$null/) ) { # Null password not allowed.
7033: eval {
7034: require Authen::Krb4;
7035: };
7036: if (!$@) {
7037: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
7038: "",
7039: $contentpwd,,
7040: 'krbtgt',
7041: $contentpwd,
7042: 1,
7043: $password);
7044: if(!$k4error) {
7045: $validated = 1;
7046: } else {
7047: $validated = 0;
7048: &logthis('krb4: '.$user.', '.$contentpwd.', '.
7049: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
7050: }
7051: } else {
7052: $validated = krb5_authen($password,$null,$user,$contentpwd);
7053: }
7054: }
7055: return $validated;
7056: }
7057:
7058: sub krb5_authen {
7059: my ($password,$null,$user,$contentpwd) = @_;
7060: my $validated = 0;
7061: if(!($password =~ /$null/)) { # Null password not allowed.
7062: my $krbclient = &Authen::Krb5::parse_name($user.'@'
7063: .$contentpwd);
7064: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
7065: my $krbserver = &Authen::Krb5::parse_name($krbservice);
7066: my $credentials= &Authen::Krb5::cc_default();
7067: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
7068: .$contentpwd));
7069: my $krbreturn;
7070: if (exists(&Authen::Krb5::get_init_creds_password)) {
7071: $krbreturn =
7072: &Authen::Krb5::get_init_creds_password($krbclient,$password,
7073: $krbservice);
7074: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
7075: } else {
7076: $krbreturn =
7077: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
7078: $password,$credentials);
7079: $validated = ($krbreturn == 1);
7080: }
7081: if (!$validated) {
7082: &logthis('krb5: '.$user.', '.$contentpwd.', '.
7083: &Authen::Krb5::error());
7084: }
7085: }
7086: return $validated;
7087: }
1.220 foxr 7088:
1.84 albertel 7089: sub addline {
7090: my ($fname,$hostid,$ip,$newline)=@_;
7091: my $contents;
7092: my $found=0;
1.355 albertel 7093: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
1.134 albertel 7094: my $sh;
1.84 albertel 7095: if ($sh=IO::File->new("$fname.subscription")) {
7096: while (my $subline=<$sh>) {
7097: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
7098: }
7099: $sh->close();
7100: }
7101: $sh=IO::File->new(">$fname.subscription");
7102: if ($contents) { print $sh $contents; }
7103: if ($newline) { print $sh $newline; }
7104: $sh->close();
7105: return $found;
1.86 www 7106: }
7107:
1.234 foxr 7108: sub get_chat {
1.324 raeburn 7109: my ($cdom,$cname,$udom,$uname,$group)=@_;
1.310 albertel 7110:
1.87 www 7111: my @entries=();
1.324 raeburn 7112: my $namespace = 'nohist_chatroom';
7113: my $namespace_inroom = 'nohist_inchatroom';
1.335 albertel 7114: if ($group ne '') {
1.324 raeburn 7115: $namespace .= '_'.$group;
7116: $namespace_inroom .= '_'.$group;
7117: }
7118: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 7119: &GDBM_READER());
7120: if ($hashref) {
7121: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311 albertel 7122: &untie_user_hash($hashref);
1.123 www 7123: }
1.124 www 7124: my @participants=();
1.134 albertel 7125: my $cutoff=time-60;
1.324 raeburn 7126: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
1.310 albertel 7127: &GDBM_WRCREAT());
7128: if ($hashref) {
7129: $hashref->{$uname.':'.$udom}=time;
7130: foreach my $user (sort(keys(%$hashref))) {
7131: if ($hashref->{$user}>$cutoff) {
7132: push(@participants, 'active_participant:'.$user);
1.123 www 7133: }
7134: }
1.311 albertel 7135: &untie_user_hash($hashref);
1.86 www 7136: }
1.124 www 7137: return (@participants,@entries);
1.86 www 7138: }
7139:
1.234 foxr 7140: sub chat_add {
1.324 raeburn 7141: my ($cdom,$cname,$newchat,$group)=@_;
1.88 albertel 7142: my @entries=();
1.142 www 7143: my $time=time;
1.324 raeburn 7144: my $namespace = 'nohist_chatroom';
7145: my $logfile = 'chatroom.log';
1.335 albertel 7146: if ($group ne '') {
1.324 raeburn 7147: $namespace .= '_'.$group;
7148: $logfile = 'chatroom_'.$group.'.log';
7149: }
7150: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 7151: &GDBM_WRCREAT());
7152: if ($hashref) {
7153: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88 albertel 7154: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
7155: my ($thentime,$idnum)=split(/\_/,$lastid);
7156: my $newid=$time.'_000000';
7157: if ($thentime==$time) {
7158: $idnum=~s/^0+//;
7159: $idnum++;
7160: $idnum=substr('000000'.$idnum,-6,6);
7161: $newid=$time.'_'.$idnum;
7162: }
1.310 albertel 7163: $hashref->{$newid}=$newchat;
1.88 albertel 7164: my $expired=$time-3600;
1.310 albertel 7165: foreach my $comment (keys(%$hashref)) {
7166: my ($thistime) = ($comment=~/(\d+)\_/);
1.88 albertel 7167: if ($thistime<$expired) {
1.310 albertel 7168: delete $hashref->{$comment};
1.88 albertel 7169: }
7170: }
1.310 albertel 7171: {
7172: my $proname=&propath($cdom,$cname);
1.324 raeburn 7173: if (open(CHATLOG,">>$proname/$logfile")) {
1.310 albertel 7174: print CHATLOG ("$time:".&unescape($newchat)."\n");
7175: }
7176: close(CHATLOG);
1.142 www 7177: }
1.311 albertel 7178: &untie_user_hash($hashref);
1.86 www 7179: }
1.84 albertel 7180: }
7181:
7182: sub unsub {
7183: my ($fname,$clientip)=@_;
7184: my $result;
1.188 foxr 7185: my $unsubs = 0; # Number of successful unsubscribes:
7186:
7187:
7188: # An old way subscriptions were handled was to have a
7189: # subscription marker file:
7190:
7191: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 7192: if (unlink("$fname.$clientname")) {
1.188 foxr 7193: $unsubs++; # Successful unsub via marker file.
7194: }
7195:
7196: # The more modern way to do it is to have a subscription list
7197: # file:
7198:
1.84 albertel 7199: if (-e "$fname.subscription") {
1.161 foxr 7200: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 7201: if ($found) {
7202: $unsubs++;
7203: }
7204: }
7205:
7206: # If either or both of these mechanisms succeeded in unsubscribing a
7207: # resource we can return ok:
7208:
7209: if($unsubs) {
7210: $result = "ok\n";
1.84 albertel 7211: } else {
1.188 foxr 7212: $result = "not_subscribed\n";
1.84 albertel 7213: }
1.188 foxr 7214:
1.84 albertel 7215: return $result;
7216: }
7217:
1.101 www 7218: sub currentversion {
7219: my $fname=shift;
7220: my $version=-1;
7221: my $ulsdir='';
7222: if ($fname=~/^(.+)\/[^\/]+$/) {
7223: $ulsdir=$1;
7224: }
1.114 albertel 7225: my ($fnamere1,$fnamere2);
7226: # remove version if already specified
1.101 www 7227: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 7228: # get the bits that go before and after the version number
7229: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7230: $fnamere1=$1;
7231: $fnamere2='.'.$2;
7232: }
1.101 www 7233: if (-e $fname) { $version=1; }
7234: if (-e $ulsdir) {
1.134 albertel 7235: if(-d $ulsdir) {
7236: if (opendir(LSDIR,$ulsdir)) {
7237: my $ulsfn;
7238: while ($ulsfn=readdir(LSDIR)) {
1.101 www 7239: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 7240: my $thisfile=$ulsdir.'/'.$ulsfn;
7241: unless (-l $thisfile) {
1.160 www 7242: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 7243: if ($1>$version) { $version=$1; }
7244: }
7245: }
7246: }
7247: closedir(LSDIR);
7248: $version++;
7249: }
7250: }
7251: }
7252: return $version;
1.101 www 7253: }
7254:
7255: sub thisversion {
7256: my $fname=shift;
7257: my $version=-1;
7258: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7259: $version=$1;
7260: }
7261: return $version;
7262: }
7263:
1.84 albertel 7264: sub subscribe {
7265: my ($userinput,$clientip)=@_;
7266: my $result;
1.293 albertel 7267: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 7268: my $ownership=&ishome($fname);
7269: if ($ownership eq 'owner') {
1.101 www 7270: # explitly asking for the current version?
7271: unless (-e $fname) {
7272: my $currentversion=¤tversion($fname);
7273: if (&thisversion($fname)==$currentversion) {
7274: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7275: my $root=$1;
7276: my $extension=$2;
7277: symlink($root.'.'.$extension,
7278: $root.'.'.$currentversion.'.'.$extension);
1.102 www 7279: unless ($extension=~/\.meta$/) {
7280: symlink($root.'.'.$extension.'.meta',
7281: $root.'.'.$currentversion.'.'.$extension.'.meta');
7282: }
1.101 www 7283: }
7284: }
7285: }
1.84 albertel 7286: if (-e $fname) {
7287: if (-d $fname) {
7288: $result="directory\n";
7289: } else {
1.161 foxr 7290: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 7291: my $now=time;
1.161 foxr 7292: my $found=&addline($fname,$clientname,$clientip,
7293: "$clientname:$clientip:$now\n");
1.84 albertel 7294: if ($found) { $result="$fname\n"; }
7295: # if they were subscribed to only meta data, delete that
7296: # subscription, when you subscribe to a file you also get
7297: # the metadata
7298: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7299: $fname=~s/\/home\/httpd\/html\/res/raw/;
1.476 raeburn 7300: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
7301: $protocol = 'http' if ($protocol ne 'https');
7302: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
1.84 albertel 7303: $result="$fname\n";
7304: }
7305: } else {
7306: $result="not_found\n";
7307: }
7308: } else {
7309: $result="rejected\n";
7310: }
7311: return $result;
7312: }
1.287 foxr 7313: # Change the passwd of a unix user. The caller must have
7314: # first verified that the user is a loncapa user.
7315: #
7316: # Parameters:
7317: # user - Unix user name to change.
7318: # pass - New password for the user.
7319: # Returns:
7320: # ok - if success
7321: # other - Some meaningfule error message string.
7322: # NOTE:
7323: # invokes a setuid script to change the passwd.
7324: sub change_unix_password {
7325: my ($user, $pass) = @_;
7326:
7327: &Debug("change_unix_password");
7328: my $execdir=$perlvar{'lonDaemons'};
7329: &Debug("Opening lcpasswd pipeline");
7330: my $pf = IO::File->new("|$execdir/lcpasswd > "
7331: ."$perlvar{'lonDaemons'}"
7332: ."/logs/lcpasswd.log");
7333: print $pf "$user\n$pass\n$pass\n";
7334: close $pf;
7335: my $err = $?;
7336: return ($err < @passwderrors) ? $passwderrors[$err] :
7337: "pwchange_falure - unknown error";
7338:
7339:
7340: }
7341:
1.91 albertel 7342:
7343: sub make_passwd_file {
1.483 www 7344: my ($uname,$udom,$umode,$npass,$passfilename)=@_;
1.390 raeburn 7345: my $result="ok";
1.91 albertel 7346: if ($umode eq 'krb4' or $umode eq 'krb5') {
7347: {
7348: my $pf = IO::File->new(">$passfilename");
1.261 foxr 7349: if ($pf) {
7350: print $pf "$umode:$npass\n";
7351: } else {
7352: $result = "pass_file_failed_error";
7353: }
1.91 albertel 7354: }
7355: } elsif ($umode eq 'internal') {
7356: my $salt=time;
7357: $salt=substr($salt,6,2);
7358: my $ncpass=crypt($npass,$salt);
7359: {
7360: &Debug("Creating internal auth");
7361: my $pf = IO::File->new(">$passfilename");
1.261 foxr 7362: if($pf) {
7363: print $pf "internal:$ncpass\n";
7364: } else {
7365: $result = "pass_file_failed_error";
7366: }
1.91 albertel 7367: }
7368: } elsif ($umode eq 'localauth') {
7369: {
7370: my $pf = IO::File->new(">$passfilename");
1.261 foxr 7371: if($pf) {
7372: print $pf "localauth:$npass\n";
7373: } else {
7374: $result = "pass_file_failed_error";
7375: }
1.91 albertel 7376: }
7377: } elsif ($umode eq 'unix') {
7378: {
1.186 foxr 7379: #
7380: # Don't allow the creation of privileged accounts!!! that would
7381: # be real bad!!!
7382: #
7383: my $uid = getpwnam($uname);
7384: if((defined $uid) && ($uid == 0)) {
1.483 www 7385: &logthis(">>>Attempt to create privileged account blocked");
1.186 foxr 7386: return "no_priv_account_error\n";
7387: }
7388:
1.223 foxr 7389: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 7390:
7391: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 7392: {
7393: &Debug("Executing external: ".$execpath);
1.98 foxr 7394: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 7395: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 7396: print $se "$uname\n";
1.483 www 7397: print $se "$udom\n";
1.91 albertel 7398: print $se "$npass\n";
7399: print $se "$npass\n";
1.223 foxr 7400: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 7401: }
1.285 foxr 7402: if (-r $lc_error_file) {
7403: &Debug("Opening error file: $lc_error_file");
7404: my $error = IO::File->new("< $lc_error_file");
7405: my $useraddok = <$error>;
7406: $error->close;
7407: unlink($lc_error_file);
7408:
7409: chomp $useraddok;
7410:
7411: if($useraddok > 0) {
7412: my $error_text = &lcuseraddstrerror($useraddok);
7413: &logthis("Failed lcuseradd: $error_text");
1.390 raeburn 7414: $result = "lcuseradd_failed:$error_text";
1.285 foxr 7415: } else {
7416: my $pf = IO::File->new(">$passfilename");
7417: if($pf) {
7418: print $pf "unix:\n";
7419: } else {
7420: $result = "pass_file_failed_error";
7421: }
7422: }
1.224 foxr 7423: } else {
1.285 foxr 7424: &Debug("Could not locate lcuseradd error: $lc_error_file");
7425: $result="bug_lcuseradd_no_output_file";
1.91 albertel 7426: }
7427: }
7428: } elsif ($umode eq 'none') {
7429: {
1.223 foxr 7430: my $pf = IO::File->new("> $passfilename");
1.261 foxr 7431: if($pf) {
7432: print $pf "none:\n";
7433: } else {
7434: $result = "pass_file_failed_error";
7435: }
1.91 albertel 7436: }
7437: } else {
1.390 raeburn 7438: $result="auth_mode_error";
1.91 albertel 7439: }
7440: return $result;
1.121 albertel 7441: }
7442:
1.265 albertel 7443: sub convert_photo {
7444: my ($start,$dest)=@_;
7445: system("convert $start $dest");
7446: }
7447:
1.121 albertel 7448: sub sethost {
7449: my ($remotereq) = @_;
7450: my (undef,$hostid)=split(/:/,$remotereq);
1.322 albertel 7451: # ignore sethost if we are already correct
7452: if ($hostid eq $currenthostid) {
7453: return 'ok';
7454: }
7455:
1.121 albertel 7456: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
1.368 albertel 7457: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7458: eq &Apache::lonnet::get_host_ip($hostid)) {
1.200 matthew 7459: $currenthostid =$hostid;
1.369 albertel 7460: $currentdomainid=&Apache::lonnet::host_domain($hostid);
1.443 www 7461: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
1.121 albertel 7462: } else {
7463: &logthis("Requested host id $hostid not an alias of ".
7464: $perlvar{'lonHostID'}." refusing connection");
7465: return 'unable_to_set';
7466: }
7467: return 'ok';
7468: }
7469:
7470: sub version {
7471: my ($userinput)=@_;
7472: $remoteVERSION=(split(/:/,$userinput))[1];
7473: return "version:$VERSION";
1.127 albertel 7474: }
1.178 foxr 7475:
1.447 raeburn 7476: sub get_usersession_config {
7477: my ($dom,$name) = @_;
7478: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
7479: if (defined($cached)) {
7480: return $usersessionconf;
7481: } else {
7482: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
7483: if (ref($domconfig{'usersessions'}) eq 'HASH') {
7484: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
7485: return $domconfig{'usersessions'};
7486: }
7487: }
7488: return;
7489: }
1.200 matthew 7490:
1.488 raeburn 7491: #
7492: # releasereqd_check() will determine if a LON-CAPA version (defined in the
7493: # $major,$minor args passed) is not too old to allow use of a role in a
7494: # course ($cnum,$cdom args passed), if at least one of the following applies:
7495: # (a) the course is a Community, (b) the course's home server is *not* the
7496: # current server, or (c) cached course information is not stale.
7497: #
7498: # For the case where none of these apply, the course is added to the
7499: # $homecourse hash ref (keys = courseIDs, values = array of a hash of roles).
7500: # The $homecourse hash ref is for courses for which the current server is the
7501: # home server. LON-CAPA version requirements are checked elsewhere for the
7502: # items in $homecourse.
7503: #
7504:
1.453 raeburn 7505: sub releasereqd_check {
1.457 raeburn 7506: my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_;
1.453 raeburn 7507: my $home = &Apache::lonnet::homeserver($cnum,$cdom);
7508: return if ($home eq 'no_host');
7509: my ($reqdmajor,$reqdminor,$displayrole);
7510: if ($cnum =~ /$LONCAPA::match_community/) {
7511: if ($major eq '' && $minor eq '') {
7512: return unless ((ref($ids) eq 'ARRAY') &&
7513: (grep(/^\Q$home\E$/,@{$ids})));
7514: } else {
7515: $reqdmajor = 2;
7516: $reqdminor = 9;
7517: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
7518: }
7519: }
1.457 raeburn 7520: my $hashid = $cdom.':'.$cnum;
7521: my ($courseinfo,$cached) =
7522: &Apache::lonnet::is_cached_new('courseinfo',$hashid);
7523: if (defined($cached)) {
7524: if (ref($courseinfo) eq 'HASH') {
7525: if (exists($courseinfo->{'releaserequired'})) {
7526: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
7527: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
1.453 raeburn 7528: }
1.457 raeburn 7529: }
7530: } else {
7531: if (ref($ids) eq 'ARRAY') {
7532: if (grep(/^\Q$home\E$/,@{$ids})) {
7533: if (ref($homecourses) eq 'HASH') {
1.489 raeburn 7534: if (ref($homecourses->{$cdom}) eq 'HASH') {
7535: if (ref($homecourses->{$cdom}{$cnum}) eq 'HASH') {
7536: if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
7537: push(@{$homecourses->{$cdom}{$cnum}},{$key=>$value});
7538: } else {
7539: $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
7540: }
7541: } else {
7542: $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
7543: }
1.457 raeburn 7544: } else {
1.489 raeburn 7545: $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
1.453 raeburn 7546: }
7547: }
1.457 raeburn 7548: return;
1.453 raeburn 7549: }
1.457 raeburn 7550: }
7551: my $courseinfo = &get_courseinfo_hash($cnum,$cdom,$home);
7552: if (ref($courseinfo) eq 'HASH') {
7553: if (exists($courseinfo->{'releaserequired'})) {
7554: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
7555: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
1.453 raeburn 7556: }
1.466 raeburn 7557: } else {
7558: return;
1.453 raeburn 7559: }
7560: }
7561: return 1;
7562: }
7563:
1.488 raeburn 7564: #
7565: # get_courseinfo_hash() is used to retrieve course information from the db
7566: # file: nohist_courseids.db for a course for which the current server is *not*
7567: # the home server.
7568: #
7569: # A hash of a hash will be retrieved. The outer hash contains a single key --
7570: # courseID -- for the course for which the data are being requested.
7571: # The contents of the inner hash, for that single item in the outer hash
7572: # are returned (and cached in memcache for 10 minutes).
7573: #
7574:
1.450 raeburn 7575: sub get_courseinfo_hash {
7576: my ($cnum,$cdom,$home) = @_;
1.466 raeburn 7577: my %info;
7578: eval {
7579: local($SIG{ALRM}) = sub { die "timeout\n"; };
7580: local($SIG{__DIE__})='DEFAULT';
7581: alarm(3);
7582: %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.');
7583: alarm(0);
7584: };
7585: if ($@) {
7586: if ($@ eq "timeout\n") {
7587: &logthis("<font color='blue'>WARNING courseiddump for $cnum:$cdom from $home timedout</font>");
7588: } else {
7589: &logthis("<font color='yellow'>WARNING unexpected error during eval of call for courseiddump from $home</font>");
7590: }
7591: } else {
7592: if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') {
7593: my $hashid = $cdom.':'.$cnum;
7594: return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600);
7595: }
1.453 raeburn 7596: }
7597: return;
7598: }
7599:
1.488 raeburn 7600: #
7601: # check_homecourses() will retrieve course information for those courses which
7602: # are keys of the $homecourses hash ref (first arg). The nohist_courseids.db
7603: # GDBM file is tied and course information for each course retrieved. Last
7604: # visit (lasttime key) is also retrieved for each, and cached values updated
7605: # for any courses last visited less than 24 hours ago. Cached values are also
7606: # updated for any courses included in the $homecourses hash ref.
7607: #
7608: # The reason for the 24 hours constraint is that the cron entry in
7609: # /etc/cron.d/loncapa for /home/httpd/perl/refresh_courseids_db.pl causes
7610: # cached course information to be updated nightly for courses with activity
7611: # within the past 24 hours.
7612: #
7613: # Role information for the user (included in a ref to an array of hashes as the
7614: # value for each key in $homecourses) is appended to the result returned by the
7615: # routine, which will in turn be appended to the string returned to the client
7616: # hosting the user's session.
7617: #
7618:
1.453 raeburn 7619: sub check_homecourses {
1.489 raeburn 7620: my ($homecourses,$regexp,$count,$range,$start,$end,$major,$minor) = @_;
1.453 raeburn 7621: my ($result,%addtocache);
1.459 raeburn 7622: my $yesterday = time - 24*3600;
1.453 raeburn 7623: if (ref($homecourses) eq 'HASH') {
1.459 raeburn 7624: my (%okcourses,%courseinfo,%recent);
1.489 raeburn 7625: foreach my $domain (keys(%{$homecourses})) {
7626: my $hashref =
7627: &tie_domain_hash($domain, "nohist_courseids", &GDBM_WRCREAT());
7628: if (ref($hashref) eq 'HASH') {
7629: while (my ($key,$value) = each(%$hashref)) {
7630: my $unesc_key = &unescape($key);
7631: if ($unesc_key =~ /^lasttime:(\w+)$/) {
7632: my $cid = $1;
7633: $cid =~ s/_/:/;
7634: if ($value > $yesterday ) {
7635: $recent{$cid} = 1;
7636: }
7637: next;
1.459 raeburn 7638: }
1.489 raeburn 7639: my $items = &Apache::lonnet::thaw_unescape($value);
7640: if (ref($items) eq 'HASH') {
7641: my ($cdom,$cnum) = split(/_/,$unesc_key);
7642: my $hashid = $cdom.':'.$cnum;
7643: $courseinfo{$hashid} = $items;
7644: if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
7645: my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});
7646: if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {
7647: $okcourses{$hashid} = 1;
7648: }
1.453 raeburn 7649: }
7650: }
7651: }
1.489 raeburn 7652: unless (&untie_domain_hash($hashref)) {
7653: &logthis("Failed to untie tied hash for nohist_courseids.db for $domain");
7654: }
7655: } else {
7656: &logthis("Failed to tie hash for nohist_courseids.db for $domain");
1.453 raeburn 7657: }
7658: }
1.459 raeburn 7659: foreach my $hashid (keys(%recent)) {
1.465 raeburn 7660: my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid);
1.464 raeburn 7661: unless ($cached) {
7662: &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
7663: }
1.459 raeburn 7664: }
1.489 raeburn 7665: foreach my $cdom (keys(%{$homecourses})) {
7666: if (ref($homecourses->{$cdom}) eq 'HASH') {
7667: foreach my $cnum (keys(%{$homecourses->{$cdom}})) {
7668: my $hashid = $cdom.':'.$cnum;
7669: next if ($recent{$hashid});
7670: &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
7671: }
7672: }
1.459 raeburn 7673: }
1.453 raeburn 7674: foreach my $hashid (keys(%okcourses)) {
1.489 raeburn 7675: my ($cdom,$cnum) = split(/:/,$hashid);
7676: if ((ref($homecourses->{$cdom}) eq 'HASH') &&
7677: (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY')) {
7678: foreach my $role (@{$homecourses->{$cdom}{$cnum}}) {
1.453 raeburn 7679: if (ref($role) eq 'HASH') {
7680: while (my ($key,$value) = each(%{$role})) {
7681: if ($regexp eq '.') {
7682: $count++;
7683: if (defined($range) && $count >= $end) { last; }
7684: if (defined($range) && $count < $start) { next; }
7685: $result.=$key.'='.$value.'&';
7686: } else {
7687: my $unescapeKey = &unescape($key);
7688: if (eval('$unescapeKey=~/$regexp/')) {
7689: $count++;
7690: if (defined($range) && $count >= $end) { last; }
7691: if (defined($range) && $count < $start) { next; }
7692: $result.="$key=$value&";
7693: }
7694: }
7695: }
7696: }
7697: }
7698: }
1.450 raeburn 7699: }
7700: }
1.453 raeburn 7701: return $result;
7702: }
7703:
1.488 raeburn 7704: #
7705: # useable_role() will compare the LON-CAPA version required by a course with
7706: # the version available on the client server. If the client server's version
7707: # is compatible, 1 will be returned.
7708: #
7709:
1.453 raeburn 7710: sub useable_role {
7711: my ($reqdmajor,$reqdminor,$major,$minor) = @_;
7712: if ($reqdmajor ne '' && $reqdminor ne '') {
7713: return if (($major eq '' && $minor eq '') ||
7714: ($major < $reqdmajor) ||
7715: (($major == $reqdmajor) && ($minor < $reqdminor)));
7716: }
7717: return 1;
1.450 raeburn 7718: }
7719:
1.471 raeburn 7720: sub distro_and_arch {
7721: return $dist.':'.$arch;
7722: }
7723:
1.61 harris41 7724: # ----------------------------------- POD (plain old documentation, CPAN style)
7725:
7726: =head1 NAME
7727:
7728: lond - "LON Daemon" Server (port "LOND" 5663)
7729:
7730: =head1 SYNOPSIS
7731:
1.74 harris41 7732: Usage: B<lond>
7733:
7734: Should only be run as user=www. This is a command-line script which
7735: is invoked by B<loncron>. There is no expectation that a typical user
7736: will manually start B<lond> from the command-line. (In other words,
7737: DO NOT START B<lond> YOURSELF.)
1.61 harris41 7738:
7739: =head1 DESCRIPTION
7740:
1.74 harris41 7741: There are two characteristics associated with the running of B<lond>,
7742: PROCESS MANAGEMENT (starting, stopping, handling child processes)
7743: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
7744: subscriptions, etc). These are described in two large
7745: sections below.
7746:
7747: B<PROCESS MANAGEMENT>
7748:
1.61 harris41 7749: Preforker - server who forks first. Runs as a daemon. HUPs.
7750: Uses IDEA encryption
7751:
1.74 harris41 7752: B<lond> forks off children processes that correspond to the other servers
7753: in the network. Management of these processes can be done at the
7754: parent process level or the child process level.
7755:
7756: B<logs/lond.log> is the location of log messages.
7757:
7758: The process management is now explained in terms of linux shell commands,
7759: subroutines internal to this code, and signal assignments:
7760:
7761: =over 4
7762:
7763: =item *
7764:
7765: PID is stored in B<logs/lond.pid>
7766:
7767: This is the process id number of the parent B<lond> process.
7768:
7769: =item *
7770:
7771: SIGTERM and SIGINT
7772:
7773: Parent signal assignment:
7774: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7775:
7776: Child signal assignment:
7777: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
7778: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
7779: to restart a new child.)
7780:
7781: Command-line invocations:
7782: B<kill> B<-s> SIGTERM I<PID>
7783: B<kill> B<-s> SIGINT I<PID>
7784:
7785: Subroutine B<HUNTSMAN>:
7786: This is only invoked for the B<lond> parent I<PID>.
7787: This kills all the children, and then the parent.
7788: The B<lonc.pid> file is cleared.
7789:
7790: =item *
7791:
7792: SIGHUP
7793:
7794: Current bug:
7795: This signal can only be processed the first time
7796: on the parent process. Subsequent SIGHUP signals
7797: have no effect.
7798:
7799: Parent signal assignment:
7800: $SIG{HUP} = \&HUPSMAN;
7801:
7802: Child signal assignment:
7803: none (nothing happens)
7804:
7805: Command-line invocations:
7806: B<kill> B<-s> SIGHUP I<PID>
7807:
7808: Subroutine B<HUPSMAN>:
7809: This is only invoked for the B<lond> parent I<PID>,
7810: This kills all the children, and then the parent.
7811: The B<lond.pid> file is cleared.
7812:
7813: =item *
7814:
7815: SIGUSR1
7816:
7817: Parent signal assignment:
7818: $SIG{USR1} = \&USRMAN;
7819:
7820: Child signal assignment:
7821: $SIG{USR1}= \&logstatus;
7822:
7823: Command-line invocations:
7824: B<kill> B<-s> SIGUSR1 I<PID>
7825:
7826: Subroutine B<USRMAN>:
7827: When invoked for the B<lond> parent I<PID>,
7828: SIGUSR1 is sent to all the children, and the status of
7829: each connection is logged.
1.144 foxr 7830:
7831: =item *
7832:
7833: SIGUSR2
7834:
7835: Parent Signal assignment:
7836: $SIG{USR2} = \&UpdateHosts
7837:
7838: Child signal assignment:
7839: NONE
7840:
1.74 harris41 7841:
7842: =item *
7843:
7844: SIGCHLD
7845:
7846: Parent signal assignment:
7847: $SIG{CHLD} = \&REAPER;
7848:
7849: Child signal assignment:
7850: none
7851:
7852: Command-line invocations:
7853: B<kill> B<-s> SIGCHLD I<PID>
7854:
7855: Subroutine B<REAPER>:
7856: This is only invoked for the B<lond> parent I<PID>.
7857: Information pertaining to the child is removed.
7858: The socket port is cleaned up.
7859:
7860: =back
7861:
7862: B<SERVER-SIDE ACTIVITIES>
7863:
7864: Server-side information can be accepted in an encrypted or non-encrypted
7865: method.
7866:
7867: =over 4
7868:
7869: =item ping
7870:
7871: Query a client in the hosts.tab table; "Are you there?"
7872:
7873: =item pong
7874:
7875: Respond to a ping query.
7876:
7877: =item ekey
7878:
7879: Read in encrypted key, make cipher. Respond with a buildkey.
7880:
7881: =item load
7882:
7883: Respond with CPU load based on a computation upon /proc/loadavg.
7884:
7885: =item currentauth
7886:
7887: Reply with current authentication information (only over an
7888: encrypted channel).
7889:
7890: =item auth
7891:
7892: Only over an encrypted channel, reply as to whether a user's
7893: authentication information can be validated.
7894:
7895: =item passwd
7896:
7897: Allow for a password to be set.
7898:
7899: =item makeuser
7900:
7901: Make a user.
7902:
7903: =item passwd
7904:
7905: Allow for authentication mechanism and password to be changed.
7906:
7907: =item home
1.61 harris41 7908:
1.74 harris41 7909: Respond to a question "are you the home for a given user?"
7910:
7911: =item update
7912:
7913: Update contents of a subscribed resource.
7914:
7915: =item unsubscribe
7916:
7917: The server is unsubscribing from a resource.
7918:
7919: =item subscribe
7920:
7921: The server is subscribing to a resource.
7922:
7923: =item log
7924:
7925: Place in B<logs/lond.log>
7926:
7927: =item put
7928:
7929: stores hash in namespace
7930:
1.489.2.2 raeburn 7931: =item rolesput
1.74 harris41 7932:
7933: put a role into a user's environment
7934:
7935: =item get
7936:
7937: returns hash with keys from array
7938: reference filled in from namespace
7939:
7940: =item eget
7941:
7942: returns hash with keys from array
7943: reference filled in from namesp (encrypts the return communication)
7944:
7945: =item rolesget
7946:
7947: get a role from a user's environment
7948:
7949: =item del
7950:
7951: deletes keys out of array from namespace
7952:
7953: =item keys
7954:
7955: returns namespace keys
7956:
7957: =item dump
7958:
7959: dumps the complete (or key matching regexp) namespace into a hash
7960:
7961: =item store
7962:
7963: stores hash permanently
7964: for this url; hashref needs to be given and should be a \%hashname; the
7965: remaining args aren't required and if they aren't passed or are '' they will
7966: be derived from the ENV
7967:
7968: =item restore
7969:
7970: returns a hash for a given url
7971:
7972: =item querysend
7973:
7974: Tells client about the lonsql process that has been launched in response
7975: to a sent query.
7976:
7977: =item queryreply
7978:
7979: Accept information from lonsql and make appropriate storage in temporary
7980: file space.
7981:
7982: =item idput
7983:
7984: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
7985: for each student, defined perhaps by the institutional Registrar.)
7986:
7987: =item idget
7988:
7989: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
7990: for each student, defined perhaps by the institutional Registrar.)
7991:
7992: =item tmpput
7993:
7994: Accept and store information in temporary space.
7995:
7996: =item tmpget
7997:
7998: Send along temporarily stored information.
7999:
8000: =item ls
8001:
8002: List part of a user's directory.
8003:
1.135 foxr 8004: =item pushtable
8005:
8006: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
8007: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
8008: must be restored manually in case of a problem with the new table file.
8009: pushtable requires that the request be encrypted and validated via
8010: ValidateManager. The form of the command is:
8011: enc:pushtable tablename <tablecontents> \n
8012: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
8013: cleartext newline.
8014:
1.74 harris41 8015: =item Hanging up (exit or init)
8016:
8017: What to do when a client tells the server that they (the client)
8018: are leaving the network.
8019:
8020: =item unknown command
8021:
8022: If B<lond> is sent an unknown command (not in the list above),
8023: it replys to the client "unknown_cmd".
1.135 foxr 8024:
1.74 harris41 8025:
8026: =item UNKNOWN CLIENT
8027:
8028: If the anti-spoofing algorithm cannot verify the client,
8029: the client is rejected (with a "refused" message sent
8030: to the client, and the connection is closed.
8031:
8032: =back
1.61 harris41 8033:
8034: =head1 PREREQUISITES
8035:
8036: IO::Socket
8037: IO::File
8038: Apache::File
8039: POSIX
8040: Crypt::IDEA
8041: LWP::UserAgent()
8042: GDBM_File
8043: Authen::Krb4
1.91 albertel 8044: Authen::Krb5
1.61 harris41 8045:
8046: =head1 COREQUISITES
8047:
8048: =head1 OSNAMES
8049:
8050: linux
8051:
8052: =head1 SCRIPT CATEGORIES
8053:
8054: Server/Process
8055:
8056: =cut
1.409 foxr 8057:
8058:
8059: =pod
8060:
8061: =head1 LOG MESSAGES
8062:
8063: The messages below can be emitted in the lond log. This log is located
8064: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
8065: to provide coloring if examined from inside a web page. Some do not.
8066: Where color is used, the colors are; Red for sometihhng to get excited
8067: about and to follow up on. Yellow for something to keep an eye on to
8068: be sure it does not get worse, Green,and Blue for informational items.
8069:
8070: In the discussions below, sometimes reference is made to ~httpd
8071: when describing file locations. There isn't really an httpd
8072: user, however there is an httpd directory that gets installed in the
8073: place that user home directories go. On linux, this is usually
8074: (always?) /home/httpd.
8075:
8076:
8077: Some messages are colorless. These are usually (not always)
8078: Green/Blue color level messages.
8079:
8080: =over 2
8081:
8082: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
8083:
8084: A local connection negotiation was attempted by
8085: a host whose IP address was not 127.0.0.1.
8086: The socket is closed and the child will exit.
8087: lond has three ways to establish an encyrption
8088: key with a client:
8089:
8090: =over 2
8091:
8092: =item local
8093:
8094: The key is written and read from a file.
8095: This is only valid for connections from localhost.
8096:
8097: =item insecure
8098:
8099: The key is generated by the server and
8100: transmitted to the client.
8101:
8102: =item ssl (secure)
8103:
8104: An ssl connection is negotiated with the client,
8105: the key is generated by the server and sent to the
8106: client across this ssl connection before the
8107: ssl connectionis terminated and clear text
8108: transmission resumes.
8109:
8110: =back
8111:
8112: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
8113:
8114: The client is local but has not sent an initialization
8115: string that is the literal "init:local" The connection
8116: is closed and the child exits.
8117:
8118: =item Red CRITICAL Can't get key file <error>
8119:
8120: SSL key negotiation is being attempted but the call to
8121: lonssl::KeyFile failed. This usually means that the
8122: configuration file is not correctly defining or protecting
8123: the directories/files lonCertificateDirectory or
8124: lonnetPrivateKey
8125: <error> is a string that describes the reason that
8126: the key file could not be located.
8127:
8128: =item (Red) CRITICAL Can't get certificates <error>
8129:
8130: SSL key negotiation failed because we were not able to retrives our certificate
8131: or the CA's certificate in the call to lonssl::CertificateFile
8132: <error> is the textual reason this failed. Usual reasons:
8133:
8134: =over 2
8135:
8136: =item Apache config file for loncapa incorrect:
8137:
8138: one of the variables
8139: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
8140: undefined or incorrect
8141:
8142: =item Permission error:
8143:
8144: The directory pointed to by lonCertificateDirectory is not readable by lond
8145:
8146: =item Permission error:
8147:
8148: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
8149:
8150: =item Installation error:
8151:
8152: Either the certificate authority file or the certificate have not
8153: been installed in lonCertificateDirectory.
8154:
8155: =item (Red) CRITICAL SSL Socket promotion failed: <err>
8156:
8157: The promotion of the connection from plaintext to SSL failed
8158: <err> is the reason for the failure. There are two
8159: system calls involved in the promotion (one of which failed),
8160: a dup to produce
8161: a second fd on the raw socket over which the encrypted data
8162: will flow and IO::SOcket::SSL->new_from_fd which creates
8163: the SSL connection on the duped fd.
8164:
8165: =item (Blue) WARNING client did not respond to challenge
8166:
8167: This occurs on an insecure (non SSL) connection negotiation request.
8168: lond generates some number from the time, the PID and sends it to
8169: the client. The client must respond by echoing this information back.
8170: If the client does not do so, that's a violation of the challenge
8171: protocols and the connection will be failed.
8172:
8173: =item (Red) No manager table. Nobody can manage!!
8174:
8175: lond has the concept of privileged hosts that
8176: can perform remote management function such
8177: as update the hosts.tab. The manager hosts
8178: are described in the
8179: ~httpd/lonTabs/managers.tab file.
8180: this message is logged if this file is missing.
8181:
8182:
8183: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
8184:
8185: Reports the successful parse and registration
8186: of a specific manager.
8187:
8188: =item Green existing host <clustername:dnsname>
8189:
8190: The manager host is already defined in the hosts.tab
8191: the information in that table, rather than the info in the
8192: manager table will be used to determine the manager's ip.
8193:
8194: =item (Red) Unable to craete <filename>
8195:
8196: lond has been asked to create new versions of an administrative
8197: file (by a manager). When this is done, the new file is created
8198: in a temp file and then renamed into place so that there are always
8199: usable administrative files, even if the update fails. This failure
8200: message means that the temp file could not be created.
8201: The update is abandoned, and the old file is available for use.
8202:
8203: =item (Green) CopyFile from <oldname> to <newname> failed
8204:
8205: In an update of administrative files, the copy of the existing file to a
8206: backup file failed. The installation of the new file may still succeed,
8207: but there will not be a back up file to rever to (this should probably
8208: be yellow).
8209:
8210: =item (Green) Pushfile: backed up <oldname> to <newname>
8211:
8212: See above, the backup of the old administrative file succeeded.
8213:
8214: =item (Red) Pushfile: Unable to install <filename> <reason>
8215:
8216: The new administrative file could not be installed. In this case,
8217: the old administrative file is still in use.
8218:
8219: =item (Green) Installed new < filename>.
8220:
8221: The new administrative file was successfullly installed.
8222:
8223: =item (Red) Reinitializing lond pid=<pid>
8224:
8225: The lonc child process <pid> will be sent a USR2
8226: signal.
8227:
8228: =item (Red) Reinitializing self
8229:
8230: We've been asked to re-read our administrative files,and
8231: are doing so.
8232:
8233: =item (Yellow) error:Invalid process identifier <ident>
8234:
8235: A reinit command was received, but the target part of the
8236: command was not valid. It must be either
8237: 'lond' or 'lonc' but was <ident>
8238:
8239: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
8240:
8241: Checking to see if lond has been handed a valid edit
8242: command. It is possible the edit command is not valid
8243: in that case there are no log messages to indicate that.
8244:
8245: =item Result of password change for <username> pwchange_success
8246:
8247: The password for <username> was
8248: successfully changed.
8249:
8250: =item Unable to open <user> passwd to change password
8251:
8252: Could not rewrite the
8253: internal password file for a user
8254:
8255: =item Result of password change for <user> : <result>
8256:
8257: A unix password change for <user> was attempted
8258: and the pipe returned <result>
8259:
8260: =item LWP GET: <message> for <fname> (<remoteurl>)
8261:
8262: The lightweight process fetch for a resource failed
8263: with <message> the local filename that should
8264: have existed/been created was <fname> the
8265: corresponding URI: <remoteurl> This is emitted in several
8266: places.
8267:
8268: =item Unable to move <transname> to <destname>
8269:
8270: From fetch_user_file_handler - the user file was replicated but could not
8271: be mv'd to its final location.
8272:
8273: =item Looking for <domain> <username>
8274:
8275: From user_has_session_handler - This should be a Debug call instead
8276: it indicates lond is about to check whether the specified user has a
8277: session active on the specified domain on the local host.
8278:
8279: =item Client <ip> (<name>) hanging up: <input>
8280:
8281: lond has been asked to exit by its client. The <ip> and <name> identify the
8282: client systemand <input> is the full exit command sent to the server.
8283:
8284: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
8285:
8286: A lond child terminated. NOte that this termination can also occur when the
8287: child receives the QUIT or DIE signals. <pid> is the process id of the child,
8288: <hostname> the host lond is working for, and <message> the reason the child died
8289: to the best of our ability to get it (I would guess that any numeric value
8290: represents and errno value). This is immediately followed by
8291:
8292: =item Famous last words: Catching exception - <log>
8293:
8294: Where log is some recent information about the state of the child.
8295:
8296: =item Red CRITICAL: TIME OUT <pid>
8297:
8298: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
8299: doing an HTTP::GET.
8300:
8301: =item child <pid> died
8302:
8303: The reaper caught a SIGCHILD for the lond child process <pid>
8304: This should be modified to also display the IP of the dying child
8305: $children{$pid}
8306:
8307: =item Unknown child 0 died
8308: A child died but the wait for it returned a pid of zero which really should not
8309: ever happen.
8310:
8311: =item Child <which> - <pid> looks like we missed it's death
8312:
8313: When a sigchild is received, the reaper process checks all children to see if they are
8314: alive. If children are dying quite quickly, the lack of signal queuing can mean
8315: that a signal hearalds the death of more than one child. If so this message indicates
8316: which other one died. <which> is the ip of a dead child
8317:
8318: =item Free socket: <shutdownretval>
8319:
8320: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
8321: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
8322: to return anything. This is followed by:
8323:
8324: =item Red CRITICAL: Shutting down
8325:
8326: Just prior to exit.
8327:
8328: =item Free socket: <shutdownretval>
8329:
8330: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
8331: This is followed by:
8332:
8333: =item (Red) CRITICAL: Restarting
8334:
8335: lond is about to exec itself to restart.
8336:
8337: =item (Blue) Updating connections
8338:
8339: (In response to a USR2). All the children (except the one for localhost)
8340: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
8341:
8342: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
8343:
8344: Due to USR2 as above.
8345:
8346: =item (Green) keeping child for ip <ip> (pid = <pid>)
8347:
8348: In response to USR2 as above, the child indicated is not being restarted because
8349: it's assumed that we'll always need a child for the localhost.
8350:
8351:
8352: =item Going to check on the children
8353:
8354: Parent is about to check on the health of the child processes.
8355: Note that this is in response to a USR1 sent to the parent lond.
8356: there may be one or more of the next two messages:
8357:
8358: =item <pid> is dead
8359:
8360: A child that we have in our child hash as alive has evidently died.
8361:
8362: =item Child <pid> did not respond
8363:
8364: In the health check the child <pid> did not update/produce a pid_.txt
8365: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
8366: assumed to be hung in some un-fixable way.
8367:
8368: =item Finished checking children
8369:
8370: Master processs's USR1 processing is cojmplete.
8371:
8372: =item (Red) CRITICAL: ------- Starting ------
8373:
8374: (There are more '-'s on either side). Lond has forked itself off to
8375: form a new session and is about to start actual initialization.
8376:
8377: =item (Green) Attempting to start child (<client>)
8378:
8379: Started a new child process for <client>. Client is IO::Socket object
8380: connected to the child. This was as a result of a TCP/IP connection from a client.
8381:
8382: =item Unable to determine who caller was, getpeername returned nothing
8383:
8384: In child process initialization. either getpeername returned undef or
8385: a zero sized object was returned. Processing continues, but in my opinion,
8386: this should be cause for the child to exit.
8387:
8388: =item Unable to determine clientip
8389:
8390: In child process initialization. The peer address from getpeername was not defined.
8391: The client address is stored as "Unavailable" and processing continues.
8392:
8393: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8394:
8395: In child initialization. A good connectionw as received from <ip>.
8396:
8397: =over 2
8398:
8399: =item <name>
8400:
8401: is the name of the client from hosts.tab.
8402:
8403: =item <type>
8404:
8405: Is the connection type which is either
8406:
8407: =over 2
8408:
8409: =item manager
8410:
8411: The connection is from a manager node, not in hosts.tab
8412:
8413: =item client
8414:
8415: the connection is from a non-manager in the hosts.tab
8416:
8417: =item both
8418:
8419: The connection is from a manager in the hosts.tab.
8420:
8421: =back
8422:
8423: =back
8424:
8425: =item (Blue) Certificates not installed -- trying insecure auth
8426:
8427: One of the certificate file, key file or
8428: certificate authority file could not be found for a client attempting
8429: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8430: (this would be a system with an up to date lond that has not gotten a
8431: certificate from us).
8432:
8433: =item (Green) Successful local authentication
8434:
8435: A local connection successfully negotiated the encryption key.
8436: In this case the IDEA key is in a file (that is hopefully well protected).
8437:
8438: =item (Green) Successful ssl authentication with <client>
8439:
8440: The client (<client> is the peer's name in hosts.tab), has successfully
8441: negotiated an SSL connection with this child process.
8442:
8443: =item (Green) Successful insecure authentication with <client>
8444:
8445:
8446: The client has successfully negotiated an insecure connection withthe child process.
8447:
8448: =item (Yellow) Attempted insecure connection disallowed
8449:
8450: The client attempted and failed to successfully negotiate a successful insecure
8451: connection. This can happen either because the variable londAllowInsecure is false
8452: or undefined, or becuse the child did not successfully echo back the challenge
8453: string.
8454:
8455:
8456: =back
8457:
1.441 raeburn 8458: =back
8459:
1.409 foxr 8460:
8461: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom