Annotation of loncom/lond, revision 1.318.2.3
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.318.2.3! albertel 5: # $Id: lond,v 1.318.2.2 2006/02/09 20:39:25 albertel Exp $
1.60 www 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
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;
1.169 foxr 52: use LONCAPA::ConfigFileEdit;
1.200 matthew 53: use LONCAPA::lonlocal;
54: use LONCAPA::lonssl;
1.221 albertel 55: use Fcntl qw(:flock);
1.313 albertel 56: use Symbol;
1.1 albertel 57:
1.239 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='';
1.313 albertel 62: my $lond_max_wait_time = 13;
1.57 www 63:
1.318.2.3! albertel 64: my $VERSION='$Revision: 1.318.2.2 $'; #' stupid emacs
1.121 albertel 65: my $remoteVERSION;
1.214 foxr 66: my $currenthostid="default";
1.115 albertel 67: my $currentdomainid;
1.134 albertel 68:
69: my $client;
1.200 matthew 70: my $clientip; # IP address of client.
71: my $clientname; # LonCAPA name of client.
1.140 foxr 72:
1.134 albertel 73: my $server;
1.200 matthew 74: my $thisserver; # DNS of us.
75:
76: my $keymode;
1.198 foxr 77:
1.207 foxr 78: my $cipher; # Cipher key negotiated with client
79: my $tmpsnum = 0; # Id of tmpputs.
80:
1.178 foxr 81: #
82: # Connection type is:
83: # client - All client actions are allowed
84: # manager - only management functions allowed.
85: # both - Both management and client actions are allowed
86: #
1.161 foxr 87:
1.178 foxr 88: my $ConnectionType;
1.161 foxr 89:
1.200 matthew 90: my %hostid; # ID's for hosts in cluster by ip.
91: my %hostdom; # LonCAPA domain for hosts in cluster.
1.307 albertel 92: my %hostname; # DNSname -> ID's mapping.
1.200 matthew 93: my %hostip; # IPs for hosts in cluster.
94: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 95:
1.178 foxr 96: my %managers; # Ip -> manager names
1.161 foxr 97:
1.178 foxr 98: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 99:
1.178 foxr 100: #
1.207 foxr 101: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
102: # Each element of the hash contains a reference to an array that contains:
103: # A reference to a sub that executes the request corresponding to the keyword.
104: # A flag that is true if the request must be encoded to be acceptable.
105: # A mask with bits as follows:
106: # CLIENT_OK - Set when the function is allowed by ordinary clients
107: # MANAGER_OK - Set when the function is allowed to manager clients.
108: #
109: my $CLIENT_OK = 1;
110: my $MANAGER_OK = 2;
111: my %Dispatcher;
112:
113:
114: #
1.178 foxr 115: # The array below are password error strings."
116: #
117: my $lastpwderror = 13; # Largest error number from lcpasswd.
118: my @passwderrors = ("ok",
1.287 foxr 119: "pwchange_failure - lcpasswd must be run as user 'www'",
120: "pwchange_failure - lcpasswd got incorrect number of arguments",
121: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
122: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
123: "pwchange_failure - lcpasswd User does not exist.",
124: "pwchange_failure - lcpasswd Incorrect current passwd",
125: "pwchange_failure - lcpasswd Unable to su to root.",
126: "pwchange_failure - lcpasswd Cannot set new passwd.",
127: "pwchange_failure - lcpasswd Username has invalid characters",
128: "pwchange_failure - lcpasswd Invalid characters in password",
129: "pwchange_failure - lcpasswd User already exists",
130: "pwchange_failure - lcpasswd Something went wrong with user addition.",
131: "pwchange_failure - lcpasswd Password mismatch",
132: "pwchange_failure - lcpasswd Error filename is invalid");
1.97 foxr 133:
134:
1.178 foxr 135: # The array below are lcuseradd error strings.:
1.97 foxr 136:
1.178 foxr 137: my $lastadderror = 13;
138: my @adderrors = ("ok",
139: "User ID mismatch, lcuseradd must run as user www",
140: "lcuseradd Incorrect number of command line parameters must be 3",
141: "lcuseradd Incorrect number of stdinput lines, must be 3",
142: "lcuseradd Too many other simultaneous pwd changes in progress",
143: "lcuseradd User does not exist",
144: "lcuseradd Unable to make www member of users's group",
145: "lcuseradd Unable to su to root",
146: "lcuseradd Unable to set password",
147: "lcuseradd Usrname has invalid characters",
148: "lcuseradd Password has an invalid character",
149: "lcuseradd User already exists",
150: "lcuseradd Could not add user.",
151: "lcuseradd Password mismatch");
1.97 foxr 152:
1.96 foxr 153:
1.207 foxr 154:
155: #
156: # Statistics that are maintained and dislayed in the status line.
157: #
1.212 foxr 158: my $Transactions = 0; # Number of attempted transactions.
159: my $Failures = 0; # Number of transcations failed.
1.207 foxr 160:
161: # ResetStatistics:
162: # Resets the statistics counters:
163: #
164: sub ResetStatistics {
165: $Transactions = 0;
166: $Failures = 0;
167: }
168:
1.200 matthew 169: #------------------------------------------------------------------------
170: #
171: # LocalConnection
172: # Completes the formation of a locally authenticated connection.
173: # This function will ensure that the 'remote' client is really the
174: # local host. If not, the connection is closed, and the function fails.
175: # If so, initcmd is parsed for the name of a file containing the
176: # IDEA session key. The fie is opened, read, deleted and the session
177: # key returned to the caller.
178: #
179: # Parameters:
180: # $Socket - Socket open on client.
181: # $initcmd - The full text of the init command.
182: #
183: # Implicit inputs:
184: # $thisserver - Our DNS name.
185: #
186: # Returns:
187: # IDEA session key on success.
188: # undef on failure.
189: #
190: sub LocalConnection {
191: my ($Socket, $initcmd) = @_;
1.277 albertel 192: Debug("Attempting local connection: $initcmd client: $clientip me: $thisserver");
193: if($clientip ne "127.0.0.1") {
1.200 matthew 194: &logthis('<font color="red"> LocalConnection rejecting non local: '
1.277 albertel 195: ."$clientip ne $thisserver </font>");
1.200 matthew 196: close $Socket;
197: return undef;
1.224 foxr 198: } else {
1.200 matthew 199: chomp($initcmd); # Get rid of \n in filename.
200: my ($init, $type, $name) = split(/:/, $initcmd);
201: Debug(" Init command: $init $type $name ");
202:
203: # Require that $init = init, and $type = local: Otherwise
204: # the caller is insane:
205:
206: if(($init ne "init") && ($type ne "local")) {
207: &logthis('<font color = "red"> LocalConnection: caller is insane! '
208: ."init = $init, and type = $type </font>");
209: close($Socket);;
210: return undef;
211:
212: }
213: # Now get the key filename:
214:
215: my $IDEAKey = lonlocal::ReadKeyFile($name);
216: return $IDEAKey;
217: }
218: }
219: #------------------------------------------------------------------------------
220: #
221: # SSLConnection
222: # Completes the formation of an ssh authenticated connection. The
223: # socket is promoted to an ssl socket. If this promotion and the associated
224: # certificate exchange are successful, the IDEA key is generated and sent
225: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
226: # the caller after the SSL tunnel is torn down.
227: #
228: # Parameters:
229: # Name Type Purpose
230: # $Socket IO::Socket::INET Plaintext socket.
231: #
232: # Returns:
233: # IDEA key on success.
234: # undef on failure.
235: #
236: sub SSLConnection {
237: my $Socket = shift;
238:
239: Debug("SSLConnection: ");
240: my $KeyFile = lonssl::KeyFile();
241: if(!$KeyFile) {
242: my $err = lonssl::LastError();
243: &logthis("<font color=\"red\"> CRITICAL"
244: ."Can't get key file $err </font>");
245: return undef;
246: }
247: my ($CACertificate,
248: $Certificate) = lonssl::CertificateFile();
249:
250:
251: # If any of the key, certificate or certificate authority
252: # certificate filenames are not defined, this can't work.
253:
254: if((!$Certificate) || (!$CACertificate)) {
255: my $err = lonssl::LastError();
256: &logthis("<font color=\"red\"> CRITICAL"
257: ."Can't get certificates: $err </font>");
258:
259: return undef;
260: }
261: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
262:
263: # Indicate to our peer that we can procede with
264: # a transition to ssl authentication:
265:
266: print $Socket "ok:ssl\n";
267:
268: Debug("Approving promotion -> ssl");
269: # And do so:
270:
271: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
272: $CACertificate,
273: $Certificate,
274: $KeyFile);
275: if(! ($SSLSocket) ) { # SSL socket promotion failed.
276: my $err = lonssl::LastError();
277: &logthis("<font color=\"red\"> CRITICAL "
278: ."SSL Socket promotion failed: $err </font>");
279: return undef;
280: }
281: Debug("SSL Promotion successful");
282:
283: #
284: # The only thing we'll use the socket for is to send the IDEA key
285: # to the peer:
286:
287: my $Key = lonlocal::CreateCipherKey();
288: print $SSLSocket "$Key\n";
289:
290: lonssl::Close($SSLSocket);
291:
292: Debug("Key exchange complete: $Key");
293:
294: return $Key;
295: }
296: #
297: # InsecureConnection:
298: # If insecure connections are allowd,
299: # exchange a challenge with the client to 'validate' the
300: # client (not really, but that's the protocol):
301: # We produce a challenge string that's sent to the client.
302: # The client must then echo the challenge verbatim to us.
303: #
304: # Parameter:
305: # Socket - Socket open on the client.
306: # Returns:
307: # 1 - success.
308: # 0 - failure (e.g.mismatch or insecure not allowed).
309: #
310: sub InsecureConnection {
311: my $Socket = shift;
312:
313: # Don't even start if insecure connections are not allowed.
314:
315: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
316: return 0;
317: }
318:
319: # Fabricate a challenge string and send it..
320:
321: my $challenge = "$$".time; # pid + time.
322: print $Socket "$challenge\n";
323: &status("Waiting for challenge reply");
324:
325: my $answer = <$Socket>;
326: $answer =~s/\W//g;
327: if($challenge eq $answer) {
328: return 1;
1.224 foxr 329: } else {
1.200 matthew 330: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
331: &status("No challenge reqply");
332: return 0;
333: }
334:
335:
336: }
1.251 foxr 337: #
338: # Safely execute a command (as long as it's not a shel command and doesn
339: # not require/rely on shell escapes. The function operates by doing a
340: # a pipe based fork and capturing stdout and stderr from the pipe.
341: #
342: # Formal Parameters:
343: # $line - A line of text to be executed as a command.
344: # Returns:
345: # The output from that command. If the output is multiline the caller
346: # must know how to split up the output.
347: #
348: #
349: sub execute_command {
350: my ($line) = @_;
351: my @words = split(/\s/, $line); # Bust the command up into words.
352: my $output = "";
353:
354: my $pid = open(CHILD, "-|");
355:
356: if($pid) { # Parent process
357: Debug("In parent process for execute_command");
358: my @data = <CHILD>; # Read the child's outupt...
359: close CHILD;
360: foreach my $output_line (@data) {
361: Debug("Adding $output_line");
362: $output .= $output_line; # Presumably has a \n on it.
363: }
364:
365: } else { # Child process
366: close (STDERR);
367: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
368: exec(@words); # won't return.
369: }
370: return $output;
371: }
372:
1.200 matthew 373:
1.140 foxr 374: # GetCertificate: Given a transaction that requires a certificate,
375: # this function will extract the certificate from the transaction
376: # request. Note that at this point, the only concept of a certificate
377: # is the hostname to which we are connected.
378: #
379: # Parameter:
380: # request - The request sent by our client (this parameterization may
381: # need to change when we really use a certificate granting
382: # authority.
383: #
384: sub GetCertificate {
385: my $request = shift;
386:
387: return $clientip;
388: }
1.161 foxr 389:
1.178 foxr 390: #
391: # Return true if client is a manager.
392: #
393: sub isManager {
394: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
395: }
396: #
397: # Return tru if client can do client functions
398: #
399: sub isClient {
400: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
401: }
1.161 foxr 402:
403:
1.156 foxr 404: #
405: # ReadManagerTable: Reads in the current manager table. For now this is
406: # done on each manager authentication because:
407: # - These authentications are not frequent
408: # - This allows dynamic changes to the manager table
409: # without the need to signal to the lond.
410: #
411: sub ReadManagerTable {
412:
413: # Clean out the old table first..
414:
1.166 foxr 415: foreach my $key (keys %managers) {
416: delete $managers{$key};
417: }
418:
419: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
420: if (!open (MANAGERS, $tablename)) {
421: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
422: return;
423: }
424: while(my $host = <MANAGERS>) {
425: chomp($host);
426: if ($host =~ "^#") { # Comment line.
427: next;
428: }
429: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 430: # The entry is of the form:
431: # cluname:hostname
432: # cluname - A 'cluster hostname' is needed in order to negotiate
433: # the host key.
434: # hostname- The dns name of the host.
435: #
1.166 foxr 436: my($cluname, $dnsname) = split(/:/, $host);
437:
438: my $ip = gethostbyname($dnsname);
439: if(defined($ip)) { # bad names don't deserve entry.
440: my $hostip = inet_ntoa($ip);
441: $managers{$hostip} = $cluname;
442: logthis('<font color="green"> registering manager '.
443: "$dnsname as $cluname with $hostip </font>\n");
444: }
445: } else {
446: logthis('<font color="green"> existing host'." $host</font>\n");
447: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
448: }
449: }
1.156 foxr 450: }
1.140 foxr 451:
452: #
453: # ValidManager: Determines if a given certificate represents a valid manager.
454: # in this primitive implementation, the 'certificate' is
455: # just the connecting loncapa client name. This is checked
456: # against a valid client list in the configuration.
457: #
458: #
459: sub ValidManager {
460: my $certificate = shift;
461:
1.163 foxr 462: return isManager;
1.140 foxr 463: }
464: #
1.143 foxr 465: # CopyFile: Called as part of the process of installing a
466: # new configuration file. This function copies an existing
467: # file to a backup file.
468: # Parameters:
469: # oldfile - Name of the file to backup.
470: # newfile - Name of the backup file.
471: # Return:
472: # 0 - Failure (errno has failure reason).
473: # 1 - Success.
474: #
475: sub CopyFile {
1.192 foxr 476:
477: my ($oldfile, $newfile) = @_;
1.143 foxr 478:
1.281 matthew 479: if (! copy($oldfile,$newfile)) {
480: return 0;
1.143 foxr 481: }
1.281 matthew 482: chmod(0660, $newfile);
483: return 1;
1.143 foxr 484: }
1.157 foxr 485: #
486: # Host files are passed out with externally visible host IPs.
487: # If, for example, we are behind a fire-wall or NAT host, our
488: # internally visible IP may be different than the externally
489: # visible IP. Therefore, we always adjust the contents of the
490: # host file so that the entry for ME is the IP that we believe
491: # we have. At present, this is defined as the entry that
492: # DNS has for us. If by some chance we are not able to get a
493: # DNS translation for us, then we assume that the host.tab file
494: # is correct.
495: # BUGBUGBUG - in the future, we really should see if we can
496: # easily query the interface(s) instead.
497: # Parameter(s):
498: # contents - The contents of the host.tab to check.
499: # Returns:
500: # newcontents - The adjusted contents.
501: #
502: #
503: sub AdjustHostContents {
504: my $contents = shift;
505: my $adjusted;
506: my $me = $perlvar{'lonHostID'};
507:
1.166 foxr 508: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 509: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
510: chomp($line);
511: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
512: if ($id eq $me) {
1.166 foxr 513: my $ip = gethostbyname($name);
514: my $ipnew = inet_ntoa($ip);
515: $ip = $ipnew;
1.157 foxr 516: # Reconstruct the host line and append to adjusted:
517:
1.166 foxr 518: my $newline = "$id:$domain:$role:$name:$ip";
519: if($maxcon ne "") { # Not all hosts have loncnew tuning params
520: $newline .= ":$maxcon:$idleto:$mincon";
521: }
522: $adjusted .= $newline."\n";
1.157 foxr 523:
1.166 foxr 524: } else { # Not me, pass unmodified.
525: $adjusted .= $line."\n";
526: }
1.157 foxr 527: } else { # Blank or comment never re-written.
528: $adjusted .= $line."\n"; # Pass blanks and comments as is.
529: }
1.166 foxr 530: }
531: return $adjusted;
1.157 foxr 532: }
1.143 foxr 533: #
534: # InstallFile: Called to install an administrative file:
535: # - The file is created with <name>.tmp
536: # - The <name>.tmp file is then mv'd to <name>
537: # This lugubrious procedure is done to ensure that we are never without
538: # a valid, even if dated, version of the file regardless of who crashes
539: # and when the crash occurs.
540: #
541: # Parameters:
542: # Name of the file
543: # File Contents.
544: # Return:
545: # nonzero - success.
546: # 0 - failure and $! has an errno.
547: #
548: sub InstallFile {
1.192 foxr 549:
550: my ($Filename, $Contents) = @_;
1.143 foxr 551: my $TempFile = $Filename.".tmp";
552:
553: # Open the file for write:
554:
555: my $fh = IO::File->new("> $TempFile"); # Write to temp.
556: if(!(defined $fh)) {
557: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
558: return 0;
559: }
560: # write the contents of the file:
561:
562: print $fh ($Contents);
563: $fh->close; # In case we ever have a filesystem w. locking
564:
565: chmod(0660, $TempFile);
566:
567: # Now we can move install the file in position.
568:
569: move($TempFile, $Filename);
570:
571: return 1;
572: }
1.200 matthew 573:
574:
1.169 foxr 575: #
576: # ConfigFileFromSelector: converts a configuration file selector
577: # (one of host or domain at this point) into a
578: # configuration file pathname.
579: #
580: # Parameters:
581: # selector - Configuration file selector.
582: # Returns:
583: # Full path to the file or undef if the selector is invalid.
584: #
585: sub ConfigFileFromSelector {
586: my $selector = shift;
587: my $tablefile;
588:
589: my $tabledir = $perlvar{'lonTabDir'}.'/';
590: if ($selector eq "hosts") {
591: $tablefile = $tabledir."hosts.tab";
592: } elsif ($selector eq "domain") {
593: $tablefile = $tabledir."domain.tab";
594: } else {
595: return undef;
596: }
597: return $tablefile;
1.143 foxr 598:
1.169 foxr 599: }
1.143 foxr 600: #
1.141 foxr 601: # PushFile: Called to do an administrative push of a file.
602: # - Ensure the file being pushed is one we support.
603: # - Backup the old file to <filename.saved>
604: # - Separate the contents of the new file out from the
605: # rest of the request.
606: # - Write the new file.
607: # Parameter:
608: # Request - The entire user request. This consists of a : separated
609: # string pushfile:tablename:contents.
610: # NOTE: The contents may have :'s in it as well making things a bit
611: # more interesting... but not much.
612: # Returns:
613: # String to send to client ("ok" or "refused" if bad file).
614: #
615: sub PushFile {
616: my $request = shift;
617: my ($command, $filename, $contents) = split(":", $request, 3);
618:
619: # At this point in time, pushes for only the following tables are
620: # supported:
621: # hosts.tab ($filename eq host).
622: # domain.tab ($filename eq domain).
623: # Construct the destination filename or reject the request.
624: #
625: # lonManage is supposed to ensure this, however this session could be
626: # part of some elaborate spoof that managed somehow to authenticate.
627: #
628:
1.169 foxr 629:
630: my $tablefile = ConfigFileFromSelector($filename);
631: if(! (defined $tablefile)) {
1.141 foxr 632: return "refused";
633: }
634: #
635: # >copy< the old table to the backup table
636: # don't rename in case system crashes/reboots etc. in the time
637: # window between a rename and write.
638: #
639: my $backupfile = $tablefile;
640: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 641: if(!CopyFile($tablefile, $backupfile)) {
642: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
643: return "error:$!";
644: }
1.141 foxr 645: &logthis('<font color="green"> Pushfile: backed up '
646: .$tablefile." to $backupfile</font>");
647:
1.157 foxr 648: # If the file being pushed is the host file, we adjust the entry for ourself so that the
649: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
650: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
651: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
652: # that possibilty.
653:
654: if($filename eq "host") {
655: $contents = AdjustHostContents($contents);
656: }
657:
1.141 foxr 658: # Install the new file:
659:
1.143 foxr 660: if(!InstallFile($tablefile, $contents)) {
661: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 662: .$tablefile." $! </font>");
1.143 foxr 663: return "error:$!";
1.224 foxr 664: } else {
1.143 foxr 665: &logthis('<font color="green"> Installed new '.$tablefile
666: ."</font>");
667:
668: }
669:
1.141 foxr 670:
671: # Indicate success:
672:
673: return "ok";
674:
675: }
1.145 foxr 676:
677: #
678: # Called to re-init either lonc or lond.
679: #
680: # Parameters:
681: # request - The full request by the client. This is of the form
682: # reinit:<process>
683: # where <process> is allowed to be either of
684: # lonc or lond
685: #
686: # Returns:
687: # The string to be sent back to the client either:
688: # ok - Everything worked just fine.
689: # error:why - There was a failure and why describes the reason.
690: #
691: #
692: sub ReinitProcess {
693: my $request = shift;
694:
1.146 foxr 695:
696: # separate the request (reinit) from the process identifier and
697: # validate it producing the name of the .pid file for the process.
698: #
699: #
700: my ($junk, $process) = split(":", $request);
1.147 foxr 701: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 702: if($process eq 'lonc') {
703: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 704: if (!open(PIDFILE, "< $processpidfile")) {
705: return "error:Open failed for $processpidfile";
706: }
707: my $loncpid = <PIDFILE>;
708: close(PIDFILE);
709: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
710: ."</font>");
711: kill("USR2", $loncpid);
1.146 foxr 712: } elsif ($process eq 'lond') {
1.147 foxr 713: logthis('<font color="red"> Reinitializing self (lond) </font>');
714: &UpdateHosts; # Lond is us!!
1.146 foxr 715: } else {
716: &logthis('<font color="yellow" Invalid reinit request for '.$process
717: ."</font>");
718: return "error:Invalid process identifier $process";
719: }
1.145 foxr 720: return 'ok';
721: }
1.168 foxr 722: # Validate a line in a configuration file edit script:
723: # Validation includes:
724: # - Ensuring the command is valid.
725: # - Ensuring the command has sufficient parameters
726: # Parameters:
727: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 728: #
1.168 foxr 729: # Return:
730: # 0 - Invalid scriptline.
731: # 1 - Valid scriptline
732: # NOTE:
733: # Only the command syntax is checked, not the executability of the
734: # command.
735: #
736: sub isValidEditCommand {
737: my $scriptline = shift;
738:
739: # Line elements are pipe separated:
740:
741: my ($command, $key, $newline) = split(/\|/, $scriptline);
742: &logthis('<font color="green"> isValideditCommand checking: '.
743: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
744:
745: if ($command eq "delete") {
746: #
747: # key with no newline.
748: #
749: if( ($key eq "") || ($newline ne "")) {
750: return 0; # Must have key but no newline.
751: } else {
752: return 1; # Valid syntax.
753: }
1.169 foxr 754: } elsif ($command eq "replace") {
1.168 foxr 755: #
756: # key and newline:
757: #
758: if (($key eq "") || ($newline eq "")) {
759: return 0;
760: } else {
761: return 1;
762: }
1.169 foxr 763: } elsif ($command eq "append") {
764: if (($key ne "") && ($newline eq "")) {
765: return 1;
766: } else {
767: return 0;
768: }
1.168 foxr 769: } else {
770: return 0; # Invalid command.
771: }
772: return 0; # Should not get here!!!
773: }
1.169 foxr 774: #
775: # ApplyEdit - Applies an edit command to a line in a configuration
776: # file. It is the caller's responsiblity to validate the
777: # edit line.
778: # Parameters:
779: # $directive - A single edit directive to apply.
780: # Edit directives are of the form:
781: # append|newline - Appends a new line to the file.
782: # replace|key|newline - Replaces the line with key value 'key'
783: # delete|key - Deletes the line with key value 'key'.
784: # $editor - A config file editor object that contains the
785: # file being edited.
786: #
787: sub ApplyEdit {
1.192 foxr 788:
789: my ($directive, $editor) = @_;
1.169 foxr 790:
791: # Break the directive down into its command and its parameters
792: # (at most two at this point. The meaning of the parameters, if in fact
793: # they exist depends on the command).
794:
795: my ($command, $p1, $p2) = split(/\|/, $directive);
796:
797: if($command eq "append") {
798: $editor->Append($p1); # p1 - key p2 null.
799: } elsif ($command eq "replace") {
800: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
801: } elsif ($command eq "delete") {
802: $editor->DeleteLine($p1); # p1 - key p2 null.
803: } else { # Should not get here!!!
804: die "Invalid command given to ApplyEdit $command"
805: }
806: }
807: #
808: # AdjustOurHost:
809: # Adjusts a host file stored in a configuration file editor object
810: # for the true IP address of this host. This is necessary for hosts
811: # that live behind a firewall.
812: # Those hosts have a publicly distributed IP of the firewall, but
813: # internally must use their actual IP. We assume that a given
814: # host only has a single IP interface for now.
815: # Formal Parameters:
816: # editor - The configuration file editor to adjust. This
817: # editor is assumed to contain a hosts.tab file.
818: # Strategy:
819: # - Figure out our hostname.
820: # - Lookup the entry for this host.
821: # - Modify the line to contain our IP
822: # - Do a replace for this host.
823: sub AdjustOurHost {
824: my $editor = shift;
825:
826: # figure out who I am.
827:
828: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
829:
830: # Get my host file entry.
831:
832: my $ConfigLine = $editor->Find($myHostName);
833: if(! (defined $ConfigLine)) {
834: die "AdjustOurHost - no entry for me in hosts file $myHostName";
835: }
836: # figure out my IP:
837: # Use the config line to get my hostname.
838: # Use gethostbyname to translate that into an IP address.
839: #
840: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
841: my $BinaryIp = gethostbyname($name);
842: my $ip = inet_ntoa($ip);
843: #
844: # Reassemble the config line from the elements in the list.
845: # Note that if the loncnew items were not present before, they will
846: # be now even if they would be empty
847: #
848: my $newConfigLine = $id;
849: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
850: $newConfigLine .= ":".$item;
851: }
852: # Replace the line:
853:
854: $editor->ReplaceLine($id, $newConfigLine);
855:
856: }
857: #
858: # ReplaceConfigFile:
859: # Replaces a configuration file with the contents of a
860: # configuration file editor object.
861: # This is done by:
862: # - Copying the target file to <filename>.old
863: # - Writing the new file to <filename>.tmp
864: # - Moving <filename.tmp> -> <filename>
865: # This laborious process ensures that the system is never without
866: # a configuration file that's at least valid (even if the contents
867: # may be dated).
868: # Parameters:
869: # filename - Name of the file to modify... this is a full path.
870: # editor - Editor containing the file.
871: #
872: sub ReplaceConfigFile {
1.192 foxr 873:
874: my ($filename, $editor) = @_;
1.168 foxr 875:
1.169 foxr 876: CopyFile ($filename, $filename.".old");
877:
878: my $contents = $editor->Get(); # Get the contents of the file.
879:
880: InstallFile($filename, $contents);
881: }
1.168 foxr 882: #
883: #
884: # Called to edit a configuration table file
1.167 foxr 885: # Parameters:
886: # request - The entire command/request sent by lonc or lonManage
887: # Return:
888: # The reply to send to the client.
1.168 foxr 889: #
1.167 foxr 890: sub EditFile {
891: my $request = shift;
892:
893: # Split the command into it's pieces: edit:filetype:script
894:
1.168 foxr 895: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 896:
897: # Check the pre-coditions for success:
898:
899: if($request != "edit") { # Something is amiss afoot alack.
900: return "error:edit request detected, but request != 'edit'\n";
901: }
902: if( ($filetype ne "hosts") &&
903: ($filetype ne "domain")) {
904: return "error:edit requested with invalid file specifier: $filetype \n";
905: }
906:
907: # Split the edit script and check it's validity.
1.168 foxr 908:
909: my @scriptlines = split(/\n/, $script); # one line per element.
910: my $linecount = scalar(@scriptlines);
911: for(my $i = 0; $i < $linecount; $i++) {
912: chomp($scriptlines[$i]);
913: if(!isValidEditCommand($scriptlines[$i])) {
914: return "error:edit with bad script line: '$scriptlines[$i]' \n";
915: }
916: }
1.145 foxr 917:
1.167 foxr 918: # Execute the edit operation.
1.169 foxr 919: # - Create a config file editor for the appropriate file and
920: # - execute each command in the script:
921: #
922: my $configfile = ConfigFileFromSelector($filetype);
923: if (!(defined $configfile)) {
924: return "refused\n";
925: }
926: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 927:
1.169 foxr 928: for (my $i = 0; $i < $linecount; $i++) {
929: ApplyEdit($scriptlines[$i], $editor);
930: }
931: # If the file is the host file, ensure that our host is
932: # adjusted to have our ip:
933: #
934: if($filetype eq "host") {
935: AdjustOurHost($editor);
936: }
937: # Finally replace the current file with our file.
938: #
939: ReplaceConfigFile($configfile, $editor);
1.167 foxr 940:
941: return "ok\n";
942: }
1.207 foxr 943:
944: #---------------------------------------------------------------
945: #
946: # Manipulation of hash based databases (factoring out common code
947: # for later use as we refactor.
948: #
949: # Ties a domain level resource file to a hash.
950: # If requested a history entry is created in the associated hist file.
951: #
952: # Parameters:
953: # domain - Name of the domain in which the resource file lives.
954: # namespace - Name of the hash within that domain.
955: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
956: # loghead - Optional parameter, if present a log entry is created
957: # in the associated history file and this is the first part
958: # of that entry.
959: # logtail - Goes along with loghead, The actual logentry is of the
960: # form $loghead:<timestamp>:logtail.
961: # Returns:
962: # Reference to a hash bound to the db file or alternatively undef
963: # if the tie failed.
964: #
1.209 albertel 965: sub tie_domain_hash {
1.210 albertel 966: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 967:
968: # Filter out any whitespace in the domain name:
969:
970: $domain =~ s/\W//g;
971:
972: # We have enough to go on to tie the hash:
973:
974: my $user_top_dir = $perlvar{'lonUsersDir'};
975: my $domain_dir = $user_top_dir."/$domain";
1.312 albertel 976: my $resource_file = $domain_dir."/$namespace";
1.313 albertel 977: return &_locking_hash_tie($resource_file,$namespace,$how,$loghead,$logtail);
1.207 foxr 978: }
979:
1.311 albertel 980: sub untie_domain_hash {
1.313 albertel 981: return &_locking_hash_untie(@_);
1.311 albertel 982: }
1.207 foxr 983: #
984: # Ties a user's resource file to a hash.
985: # If necessary, an appropriate history
986: # log file entry is made as well.
987: # This sub factors out common code from the subs that manipulate
988: # the various gdbm files that keep keyword value pairs.
989: # Parameters:
990: # domain - Name of the domain the user is in.
991: # user - Name of the 'current user'.
992: # namespace - Namespace representing the file to tie.
993: # how - What the tie is done to (e.g. GDBM_WRCREAT().
994: # loghead - Optional first part of log entry if there may be a
995: # history file.
996: # what - Optional tail of log entry if there may be a history
997: # file.
998: # Returns:
999: # hash to which the database is tied. It's up to the caller to untie.
1000: # undef if the has could not be tied.
1001: #
1.210 albertel 1002: sub tie_user_hash {
1003: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1004:
1005: $namespace=~s/\//\_/g; # / -> _
1006: $namespace=~s/\W//g; # whitespace eliminated.
1007: my $proname = propath($domain, $user);
1.312 albertel 1008:
1009: my $file_prefix="$proname/$namespace";
1.313 albertel 1010: return &_locking_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
1.312 albertel 1011: }
1012:
1013: sub untie_user_hash {
1.313 albertel 1014: return &_locking_hash_untie(@_);
1.312 albertel 1015: }
1016:
1017: # internal routines that handle the actual tieing and untieing process
1018:
1019: sub _do_hash_tie {
1020: my ($file_prefix,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1021: my %hash;
1.312 albertel 1022: if(tie(%hash, 'GDBM_File', "$file_prefix.db", $how, 0640)) {
1.209 albertel 1023: # If this is a namespace for which a history is kept,
1024: # make the history log entry:
1.252 albertel 1025: if (($namespace !~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 1026: my $args = scalar @_;
1.312 albertel 1027: Debug(" Opening history: $file_prefix $args");
1028: my $hfh = IO::File->new(">>$file_prefix.hist");
1.209 albertel 1029: if($hfh) {
1030: my $now = time;
1031: print $hfh "$loghead:$now:$what\n";
1032: }
1.210 albertel 1033: $hfh->close;
1.209 albertel 1034: }
1.207 foxr 1035: return \%hash;
1.209 albertel 1036: } else {
1.207 foxr 1037: return undef;
1038: }
1039: }
1.214 foxr 1040:
1.312 albertel 1041: sub _do_hash_untie {
1.311 albertel 1042: my ($hashref) = @_;
1043: my $result = untie(%$hashref);
1044: return $result;
1045: }
1.313 albertel 1046:
1047: {
1048: my $sym;
1049:
1050: sub _locking_hash_tie {
1051: my ($file_prefix,$namespace,$how,$loghead,$what) = @_;
1052:
1053: my ($lock);
1054:
1055: if ($how eq &GDBM_READER()) {
1056: $lock=LOCK_SH;
1057: $how=$how|&GDBM_NOLOCK();
1058: #if the db doesn't exist we can't read from it
1059: if (! -e "$file_prefix.db") {
1060: $! = 2;
1061: return undef;
1062: }
1063: } elsif ($how eq &GDBM_WRCREAT()) {
1064: $lock=LOCK_EX;
1065: $how=$how|&GDBM_NOLOCK();
1066: if (! -e "$file_prefix.db") {
1067: # doesn't exist but we need it to in order to successfully
1068: # lock it so bring it into existance
1069: open(TOUCH,">>$file_prefix.db");
1070: close(TOUCH);
1071: }
1072: } else {
1073: &logthis("Unknown method $how for $file_prefix");
1074: die();
1075: }
1076:
1077: $sym=&Symbol::gensym();
1078: open($sym,"$file_prefix.db");
1079: my $failed=0;
1080: eval {
1081: local $SIG{__DIE__}='DEFAULT';
1082: local $SIG{ALRM}=sub {
1083: $failed=1;
1084: die("failed lock");
1085: };
1086: alarm($lond_max_wait_time);
1087: flock($sym,$lock);
1088: alarm(0);
1089: };
1090: if ($failed) {
1091: $! = 100; # throwing error # 100
1092: return undef;
1093: }
1094: return &_do_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
1095: }
1096:
1097: sub _locking_hash_untie {
1098: my ($hashref) = @_;
1099: my $result = untie(%$hashref);
1100: flock($sym,LOCK_UN);
1101: close($sym);
1102: undef($sym);
1103: return $result;
1104: }
1105: }
1106:
1.255 foxr 1107: # read_profile
1108: #
1109: # Returns a set of specific entries from a user's profile file.
1110: # this is a utility function that is used by both get_profile_entry and
1111: # get_profile_entry_encrypted.
1112: #
1113: # Parameters:
1114: # udom - Domain in which the user exists.
1115: # uname - User's account name (loncapa account)
1116: # namespace - The profile namespace to open.
1117: # what - A set of & separated queries.
1118: # Returns:
1119: # If all ok: - The string that needs to be shipped back to the user.
1120: # If failure - A string that starts with error: followed by the failure
1121: # reason.. note that this probabyl gets shipped back to the
1122: # user as well.
1123: #
1124: sub read_profile {
1125: my ($udom, $uname, $namespace, $what) = @_;
1126:
1127: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1128: &GDBM_READER());
1129: if ($hashref) {
1130: my @queries=split(/\&/,$what);
1131: my $qresult='';
1132:
1133: for (my $i=0;$i<=$#queries;$i++) {
1134: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1135: }
1136: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1.311 albertel 1137: if (&untie_user_hash($hashref)) {
1.255 foxr 1138: return $qresult;
1139: } else {
1140: return "error: ".($!+0)." untie (GDBM) Failed";
1141: }
1142: } else {
1143: if ($!+0 == 2) {
1144: return "error:No such file or GDBM reported bad block error";
1145: } else {
1146: return "error: ".($!+0)." tie (GDBM) Failed";
1147: }
1148: }
1149:
1150: }
1.214 foxr 1151: #--------------------- Request Handlers --------------------------------------------
1152: #
1.215 foxr 1153: # By convention each request handler registers itself prior to the sub
1154: # declaration:
1.214 foxr 1155: #
1156:
1.216 foxr 1157: #++
1158: #
1.214 foxr 1159: # Handles ping requests.
1160: # Parameters:
1161: # $cmd - the actual keyword that invoked us.
1162: # $tail - the tail of the request that invoked us.
1163: # $replyfd- File descriptor connected to the client
1164: # Implicit Inputs:
1165: # $currenthostid - Global variable that carries the name of the host we are
1166: # known as.
1167: # Returns:
1168: # 1 - Ok to continue processing.
1169: # 0 - Program should exit.
1170: # Side effects:
1171: # Reply information is sent to the client.
1172: sub ping_handler {
1173: my ($cmd, $tail, $client) = @_;
1174: Debug("$cmd $tail $client .. $currenthostid:");
1175:
1176: Reply( $client,"$currenthostid\n","$cmd:$tail");
1177:
1178: return 1;
1179: }
1180: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1181:
1.216 foxr 1182: #++
1.215 foxr 1183: #
1184: # Handles pong requests. Pong replies with our current host id, and
1185: # the results of a ping sent to us via our lonc.
1186: #
1187: # Parameters:
1188: # $cmd - the actual keyword that invoked us.
1189: # $tail - the tail of the request that invoked us.
1190: # $replyfd- File descriptor connected to the client
1191: # Implicit Inputs:
1192: # $currenthostid - Global variable that carries the name of the host we are
1193: # connected to.
1194: # Returns:
1195: # 1 - Ok to continue processing.
1196: # 0 - Program should exit.
1197: # Side effects:
1198: # Reply information is sent to the client.
1199: sub pong_handler {
1200: my ($cmd, $tail, $replyfd) = @_;
1201:
1202: my $reply=&reply("ping",$clientname);
1203: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1204: return 1;
1205: }
1206: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1207:
1.216 foxr 1208: #++
1209: # Called to establish an encrypted session key with the remote client.
1210: # Note that with secure lond, in most cases this function is never
1211: # invoked. Instead, the secure session key is established either
1212: # via a local file that's locked down tight and only lives for a short
1213: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1214: # bits from /dev/urandom, rather than the predictable pattern used by
1215: # by this sub. This sub is only used in the old-style insecure
1216: # key negotiation.
1217: # Parameters:
1218: # $cmd - the actual keyword that invoked us.
1219: # $tail - the tail of the request that invoked us.
1220: # $replyfd- File descriptor connected to the client
1221: # Implicit Inputs:
1222: # $currenthostid - Global variable that carries the name of the host
1223: # known as.
1224: # $clientname - Global variable that carries the name of the hsot we're connected to.
1225: # Returns:
1226: # 1 - Ok to continue processing.
1227: # 0 - Program should exit.
1228: # Implicit Outputs:
1229: # Reply information is sent to the client.
1230: # $cipher is set with a reference to a new IDEA encryption object.
1231: #
1232: sub establish_key_handler {
1233: my ($cmd, $tail, $replyfd) = @_;
1234:
1235: my $buildkey=time.$$.int(rand 100000);
1236: $buildkey=~tr/1-6/A-F/;
1237: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1238: my $key=$currenthostid.$clientname;
1239: $key=~tr/a-z/A-Z/;
1240: $key=~tr/G-P/0-9/;
1241: $key=~tr/Q-Z/0-9/;
1242: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1243: $key=substr($key,0,32);
1244: my $cipherkey=pack("H32",$key);
1245: $cipher=new IDEA $cipherkey;
1246: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1247:
1248: return 1;
1249:
1250: }
1251: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1252:
1.217 foxr 1253: # Handler for the load command. Returns the current system load average
1254: # to the requestor.
1255: #
1256: # Parameters:
1257: # $cmd - the actual keyword that invoked us.
1258: # $tail - the tail of the request that invoked us.
1259: # $replyfd- File descriptor connected to the client
1260: # Implicit Inputs:
1261: # $currenthostid - Global variable that carries the name of the host
1262: # known as.
1263: # $clientname - Global variable that carries the name of the hsot we're connected to.
1264: # Returns:
1265: # 1 - Ok to continue processing.
1266: # 0 - Program should exit.
1267: # Side effects:
1268: # Reply information is sent to the client.
1269: sub load_handler {
1270: my ($cmd, $tail, $replyfd) = @_;
1271:
1272: # Get the load average from /proc/loadavg and calculate it as a percentage of
1273: # the allowed load limit as set by the perl global variable lonLoadLim
1274:
1275: my $loadavg;
1276: my $loadfile=IO::File->new('/proc/loadavg');
1277:
1278: $loadavg=<$loadfile>;
1279: $loadavg =~ s/\s.*//g; # Extract the first field only.
1280:
1281: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1282:
1283: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1284:
1285: return 1;
1286: }
1.263 albertel 1287: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1288:
1289: #
1290: # Process the userload request. This sub returns to the client the current
1291: # user load average. It can be invoked either by clients or managers.
1292: #
1293: # Parameters:
1294: # $cmd - the actual keyword that invoked us.
1295: # $tail - the tail of the request that invoked us.
1296: # $replyfd- File descriptor connected to the client
1297: # Implicit Inputs:
1298: # $currenthostid - Global variable that carries the name of the host
1299: # known as.
1300: # $clientname - Global variable that carries the name of the hsot we're connected to.
1301: # Returns:
1302: # 1 - Ok to continue processing.
1303: # 0 - Program should exit
1304: # Implicit inputs:
1305: # whatever the userload() function requires.
1306: # Implicit outputs:
1307: # the reply is written to the client.
1308: #
1309: sub user_load_handler {
1310: my ($cmd, $tail, $replyfd) = @_;
1311:
1312: my $userloadpercent=&userload();
1313: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1314:
1315: return 1;
1316: }
1.263 albertel 1317: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1318:
1.218 foxr 1319: # Process a request for the authorization type of a user:
1320: # (userauth).
1321: #
1322: # Parameters:
1323: # $cmd - the actual keyword that invoked us.
1324: # $tail - the tail of the request that invoked us.
1325: # $replyfd- File descriptor connected to the client
1326: # Returns:
1327: # 1 - Ok to continue processing.
1328: # 0 - Program should exit
1329: # Implicit outputs:
1330: # The user authorization type is written to the client.
1331: #
1332: sub user_authorization_type {
1333: my ($cmd, $tail, $replyfd) = @_;
1334:
1335: my $userinput = "$cmd:$tail";
1336:
1337: # Pull the domain and username out of the command tail.
1.222 foxr 1338: # and call get_auth_type to determine the authentication type.
1.218 foxr 1339:
1340: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1341: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1342: if($result eq "nouser") {
1343: &Failure( $replyfd, "unknown_user\n", $userinput);
1344: } else {
1345: #
1.222 foxr 1346: # We only want to pass the second field from get_auth_type
1.218 foxr 1347: # for ^krb.. otherwise we'll be handing out the encrypted
1348: # password for internals e.g.
1349: #
1350: my ($type,$otherinfo) = split(/:/,$result);
1351: if($type =~ /^krb/) {
1352: $type = $result;
1.269 raeburn 1353: } else {
1354: $type .= ':';
1355: }
1356: &Reply( $replyfd, "$type\n", $userinput);
1.218 foxr 1357: }
1358:
1359: return 1;
1360: }
1361: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1362:
1363: # Process a request by a manager to push a hosts or domain table
1364: # to us. We pick apart the command and pass it on to the subs
1365: # that already exist to do this.
1366: #
1367: # Parameters:
1368: # $cmd - the actual keyword that invoked us.
1369: # $tail - the tail of the request that invoked us.
1370: # $client - File descriptor connected to the client
1371: # Returns:
1372: # 1 - Ok to continue processing.
1373: # 0 - Program should exit
1374: # Implicit Output:
1375: # a reply is written to the client.
1376: sub push_file_handler {
1377: my ($cmd, $tail, $client) = @_;
1378:
1379: my $userinput = "$cmd:$tail";
1380:
1381: # At this time we only know that the IP of our partner is a valid manager
1382: # the code below is a hook to do further authentication (e.g. to resolve
1383: # spoofing).
1384:
1385: my $cert = &GetCertificate($userinput);
1386: if(&ValidManager($cert)) {
1387:
1388: # Now presumably we have the bona fides of both the peer host and the
1389: # process making the request.
1390:
1391: my $reply = &PushFile($userinput);
1392: &Reply($client, "$reply\n", $userinput);
1393:
1394: } else {
1395: &Failure( $client, "refused\n", $userinput);
1396: }
1.219 foxr 1397: return 1;
1.218 foxr 1398: }
1399: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1400:
1.243 banghart 1401: #
1402: # du - list the disk usuage of a directory recursively.
1403: #
1404: # note: stolen code from the ls file handler
1405: # under construction by Rick Banghart
1406: # .
1407: # Parameters:
1408: # $cmd - The command that dispatched us (du).
1409: # $ududir - The directory path to list... I'm not sure what this
1410: # is relative as things like ls:. return e.g.
1411: # no_such_dir.
1412: # $client - Socket open on the client.
1413: # Returns:
1414: # 1 - indicating that the daemon should not disconnect.
1415: # Side Effects:
1416: # The reply is written to $client.
1417: #
1418: sub du_handler {
1419: my ($cmd, $ududir, $client) = @_;
1.251 foxr 1420: my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1421: my $userinput = "$cmd:$ududir";
1422:
1.245 albertel 1423: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1424: &Failure($client,"refused\n","$cmd:$ududir");
1425: return 1;
1426: }
1.249 foxr 1427: # Since $ududir could have some nasties in it,
1428: # we will require that ududir is a valid
1429: # directory. Just in case someone tries to
1430: # slip us a line like .;(cd /home/httpd rm -rf*)
1431: # etc.
1432: #
1433: if (-d $ududir) {
1.292 albertel 1434: my $total_size=0;
1435: my $code=sub {
1436: if ($_=~/\.\d+\./) { return;}
1437: if ($_=~/\.meta$/) { return;}
1438: $total_size+=(stat($_))[7];
1439: };
1.295 raeburn 1440: chdir($ududir);
1.292 albertel 1441: find($code,$ududir);
1442: $total_size=int($total_size/1024);
1443: &Reply($client,"$total_size\n","$cmd:$ududir");
1.249 foxr 1444: } else {
1.251 foxr 1445: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1.249 foxr 1446: }
1.243 banghart 1447: return 1;
1448: }
1449: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1450:
1.239 foxr 1451: #
1.280 matthew 1452: # The ls_handler routine should be considered obosolete and is retained
1453: # for communication with legacy servers. Please see the ls2_handler.
1454: #
1.239 foxr 1455: # ls - list the contents of a directory. For each file in the
1456: # selected directory the filename followed by the full output of
1457: # the stat function is returned. The returned info for each
1458: # file are separated by ':'. The stat fields are separated by &'s.
1459: # Parameters:
1460: # $cmd - The command that dispatched us (ls).
1461: # $ulsdir - The directory path to list... I'm not sure what this
1462: # is relative as things like ls:. return e.g.
1463: # no_such_dir.
1464: # $client - Socket open on the client.
1465: # Returns:
1466: # 1 - indicating that the daemon should not disconnect.
1467: # Side Effects:
1468: # The reply is written to $client.
1469: #
1470: sub ls_handler {
1.280 matthew 1471: # obsoleted by ls2_handler
1.239 foxr 1472: my ($cmd, $ulsdir, $client) = @_;
1473:
1474: my $userinput = "$cmd:$ulsdir";
1475:
1476: my $obs;
1477: my $rights;
1478: my $ulsout='';
1479: my $ulsfn;
1480: if (-e $ulsdir) {
1481: if(-d $ulsdir) {
1482: if (opendir(LSDIR,$ulsdir)) {
1483: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1484: undef($obs);
1485: undef($rights);
1.239 foxr 1486: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1487: #We do some obsolete checking here
1488: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1489: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1490: my @obsolete=<FILE>;
1491: foreach my $obsolete (@obsolete) {
1.301 www 1492: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.239 foxr 1493: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1494: }
1495: }
1496: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1497: if($obs eq '1') { $ulsout.="&1"; }
1498: else { $ulsout.="&0"; }
1499: if($rights eq '1') { $ulsout.="&1:"; }
1500: else { $ulsout.="&0:"; }
1501: }
1502: closedir(LSDIR);
1503: }
1504: } else {
1505: my @ulsstats=stat($ulsdir);
1506: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1507: }
1508: } else {
1509: $ulsout='no_such_dir';
1510: }
1511: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1512: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1513:
1514: return 1;
1515:
1516: }
1517: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1518:
1.280 matthew 1519: #
1520: # Please also see the ls_handler, which this routine obosolets.
1521: # ls2_handler differs from ls_handler in that it escapes its return
1522: # values before concatenating them together with ':'s.
1523: #
1524: # ls2 - list the contents of a directory. For each file in the
1525: # selected directory the filename followed by the full output of
1526: # the stat function is returned. The returned info for each
1527: # file are separated by ':'. The stat fields are separated by &'s.
1528: # Parameters:
1529: # $cmd - The command that dispatched us (ls).
1530: # $ulsdir - The directory path to list... I'm not sure what this
1531: # is relative as things like ls:. return e.g.
1532: # no_such_dir.
1533: # $client - Socket open on the client.
1534: # Returns:
1535: # 1 - indicating that the daemon should not disconnect.
1536: # Side Effects:
1537: # The reply is written to $client.
1538: #
1539: sub ls2_handler {
1540: my ($cmd, $ulsdir, $client) = @_;
1541:
1542: my $userinput = "$cmd:$ulsdir";
1543:
1544: my $obs;
1545: my $rights;
1546: my $ulsout='';
1547: my $ulsfn;
1548: if (-e $ulsdir) {
1549: if(-d $ulsdir) {
1550: if (opendir(LSDIR,$ulsdir)) {
1551: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1552: undef($obs);
1553: undef($rights);
1.280 matthew 1554: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1555: #We do some obsolete checking here
1556: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1557: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1558: my @obsolete=<FILE>;
1559: foreach my $obsolete (@obsolete) {
1.301 www 1560: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.280 matthew 1561: if($obsolete =~ m|(<copyright>)(default)|) {
1562: $rights = 1;
1563: }
1564: }
1565: }
1566: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1567: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1568: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1569: $ulsout.= &escape($tmp).':';
1570: }
1571: closedir(LSDIR);
1572: }
1573: } else {
1574: my @ulsstats=stat($ulsdir);
1575: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1576: }
1577: } else {
1578: $ulsout='no_such_dir';
1579: }
1580: if ($ulsout eq '') { $ulsout='empty'; }
1581: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1582: return 1;
1583: }
1584: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1585:
1.218 foxr 1586: # Process a reinit request. Reinit requests that either
1587: # lonc or lond be reinitialized so that an updated
1588: # host.tab or domain.tab can be processed.
1589: #
1590: # Parameters:
1591: # $cmd - the actual keyword that invoked us.
1592: # $tail - the tail of the request that invoked us.
1593: # $client - File descriptor connected to the client
1594: # Returns:
1595: # 1 - Ok to continue processing.
1596: # 0 - Program should exit
1597: # Implicit output:
1598: # a reply is sent to the client.
1599: #
1600: sub reinit_process_handler {
1601: my ($cmd, $tail, $client) = @_;
1602:
1603: my $userinput = "$cmd:$tail";
1604:
1605: my $cert = &GetCertificate($userinput);
1606: if(&ValidManager($cert)) {
1607: chomp($userinput);
1608: my $reply = &ReinitProcess($userinput);
1609: &Reply( $client, "$reply\n", $userinput);
1610: } else {
1611: &Failure( $client, "refused\n", $userinput);
1612: }
1613: return 1;
1614: }
1615: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1616:
1617: # Process the editing script for a table edit operation.
1618: # the editing operation must be encrypted and requested by
1619: # a manager host.
1620: #
1621: # Parameters:
1622: # $cmd - the actual keyword that invoked us.
1623: # $tail - the tail of the request that invoked us.
1624: # $client - File descriptor connected to the client
1625: # Returns:
1626: # 1 - Ok to continue processing.
1627: # 0 - Program should exit
1628: # Implicit output:
1629: # a reply is sent to the client.
1630: #
1631: sub edit_table_handler {
1632: my ($command, $tail, $client) = @_;
1633:
1634: my $userinput = "$command:$tail";
1635:
1636: my $cert = &GetCertificate($userinput);
1637: if(&ValidManager($cert)) {
1638: my($filetype, $script) = split(/:/, $tail);
1639: if (($filetype eq "hosts") ||
1640: ($filetype eq "domain")) {
1641: if($script ne "") {
1642: &Reply($client, # BUGBUG - EditFile
1643: &EditFile($userinput), # could fail.
1644: $userinput);
1645: } else {
1646: &Failure($client,"refused\n",$userinput);
1647: }
1648: } else {
1649: &Failure($client,"refused\n",$userinput);
1650: }
1651: } else {
1652: &Failure($client,"refused\n",$userinput);
1653: }
1654: return 1;
1655: }
1.263 albertel 1656: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1657:
1.220 foxr 1658: #
1659: # Authenticate a user against the LonCAPA authentication
1660: # database. Note that there are several authentication
1661: # possibilities:
1662: # - unix - The user can be authenticated against the unix
1663: # password file.
1664: # - internal - The user can be authenticated against a purely
1665: # internal per user password file.
1666: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1667: # ticket granting authority.
1668: # - user - The person tailoring LonCAPA can supply a user authentication
1669: # mechanism that is per system.
1670: #
1671: # Parameters:
1672: # $cmd - The command that got us here.
1673: # $tail - Tail of the command (remaining parameters).
1674: # $client - File descriptor connected to client.
1675: # Returns
1676: # 0 - Requested to exit, caller should shut down.
1677: # 1 - Continue processing.
1678: # Implicit inputs:
1679: # The authentication systems describe above have their own forms of implicit
1680: # input into the authentication process that are described above.
1681: #
1682: sub authenticate_handler {
1683: my ($cmd, $tail, $client) = @_;
1684:
1685:
1686: # Regenerate the full input line
1687:
1688: my $userinput = $cmd.":".$tail;
1689:
1690: # udom - User's domain.
1691: # uname - Username.
1692: # upass - User's password.
1693:
1694: my ($udom,$uname,$upass)=split(/:/,$tail);
1695: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1696: chomp($upass);
1697: $upass=&unescape($upass);
1698:
1699: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1700: if($pwdcorrect) {
1701: &Reply( $client, "authorized\n", $userinput);
1702: #
1703: # Bad credentials: Failed to authorize
1704: #
1705: } else {
1706: &Failure( $client, "non_authorized\n", $userinput);
1707: }
1708:
1709: return 1;
1710: }
1.263 albertel 1711: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1712:
1.222 foxr 1713: #
1714: # Change a user's password. Note that this function is complicated by
1715: # the fact that a user may be authenticated in more than one way:
1716: # At present, we are not able to change the password for all types of
1717: # authentication methods. Only for:
1718: # unix - unix password or shadow passoword style authentication.
1719: # local - Locally written authentication mechanism.
1720: # For now, kerb4 and kerb5 password changes are not supported and result
1721: # in an error.
1722: # FUTURE WORK:
1723: # Support kerberos passwd changes?
1724: # Parameters:
1725: # $cmd - The command that got us here.
1726: # $tail - Tail of the command (remaining parameters).
1727: # $client - File descriptor connected to client.
1728: # Returns
1729: # 0 - Requested to exit, caller should shut down.
1730: # 1 - Continue processing.
1731: # Implicit inputs:
1732: # The authentication systems describe above have their own forms of implicit
1733: # input into the authentication process that are described above.
1734: sub change_password_handler {
1735: my ($cmd, $tail, $client) = @_;
1736:
1737: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1738:
1739: #
1740: # udom - user's domain.
1741: # uname - Username.
1742: # upass - Current password.
1743: # npass - New password.
1744:
1745: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1746:
1747: $upass=&unescape($upass);
1748: $npass=&unescape($npass);
1749: &Debug("Trying to change password for $uname");
1750:
1751: # First require that the user can be authenticated with their
1752: # old password:
1753:
1754: my $validated = &validate_user($udom, $uname, $upass);
1755: if($validated) {
1756: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1757:
1758: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1759: if ($howpwd eq 'internal') {
1760: &Debug("internal auth");
1761: my $salt=time;
1762: $salt=substr($salt,6,2);
1763: my $ncpass=crypt($npass,$salt);
1764: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1765: &logthis("Result of password change for "
1766: ."$uname: pwchange_success");
1767: &Reply($client, "ok\n", $userinput);
1768: } else {
1769: &logthis("Unable to open $uname passwd "
1770: ."to change password");
1771: &Failure( $client, "non_authorized\n",$userinput);
1772: }
1773: } elsif ($howpwd eq 'unix') {
1.287 foxr 1774: my $result = &change_unix_password($uname, $npass);
1.222 foxr 1775: &logthis("Result of password change for $uname: ".
1.287 foxr 1776: $result);
1.222 foxr 1777: &Reply($client, "$result\n", $userinput);
1778: } else {
1779: # this just means that the current password mode is not
1780: # one we know how to change (e.g the kerberos auth modes or
1781: # locally written auth handler).
1782: #
1783: &Failure( $client, "auth_mode_error\n", $userinput);
1784: }
1785:
1.224 foxr 1786: } else {
1.222 foxr 1787: &Failure( $client, "non_authorized\n", $userinput);
1788: }
1789:
1790: return 1;
1791: }
1.263 albertel 1792: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1793:
1.225 foxr 1794: #
1795: # Create a new user. User in this case means a lon-capa user.
1796: # The user must either already exist in some authentication realm
1797: # like kerberos or the /etc/passwd. If not, a user completely local to
1798: # this loncapa system is created.
1799: #
1800: # Parameters:
1801: # $cmd - The command that got us here.
1802: # $tail - Tail of the command (remaining parameters).
1803: # $client - File descriptor connected to client.
1804: # Returns
1805: # 0 - Requested to exit, caller should shut down.
1806: # 1 - Continue processing.
1807: # Implicit inputs:
1808: # The authentication systems describe above have their own forms of implicit
1809: # input into the authentication process that are described above.
1810: sub add_user_handler {
1811:
1812: my ($cmd, $tail, $client) = @_;
1813:
1814:
1815: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1816: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1817:
1818: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1819:
1820:
1821: if($udom eq $currentdomainid) { # Reject new users for other domains...
1822:
1823: my $oldumask=umask(0077);
1824: chomp($npass);
1825: $npass=&unescape($npass);
1826: my $passfilename = &password_path($udom, $uname);
1827: &Debug("Password file created will be:".$passfilename);
1828: if (-e $passfilename) {
1829: &Failure( $client, "already_exists\n", $userinput);
1830: } else {
1831: my $fperror='';
1.264 albertel 1832: if (!&mkpath($passfilename)) {
1833: $fperror="error: ".($!+0)." mkdir failed while attempting "
1834: ."makeuser";
1.225 foxr 1835: }
1836: unless ($fperror) {
1837: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1838: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1839: } else {
1840: &Failure($client, "$fperror\n", $userinput);
1841: }
1842: }
1843: umask($oldumask);
1844: } else {
1845: &Failure($client, "not_right_domain\n",
1846: $userinput); # Even if we are multihomed.
1847:
1848: }
1849: return 1;
1850:
1851: }
1852: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1853:
1854: #
1855: # Change the authentication method of a user. Note that this may
1856: # also implicitly change the user's password if, for example, the user is
1857: # joining an existing authentication realm. Known authentication realms at
1858: # this time are:
1859: # internal - Purely internal password file (only loncapa knows this user)
1860: # local - Institutionally written authentication module.
1861: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1862: # kerb4 - kerberos version 4
1863: # kerb5 - kerberos version 5
1864: #
1865: # Parameters:
1866: # $cmd - The command that got us here.
1867: # $tail - Tail of the command (remaining parameters).
1868: # $client - File descriptor connected to client.
1869: # Returns
1870: # 0 - Requested to exit, caller should shut down.
1871: # 1 - Continue processing.
1872: # Implicit inputs:
1873: # The authentication systems describe above have their own forms of implicit
1874: # input into the authentication process that are described above.
1.287 foxr 1875: # NOTE:
1876: # This is also used to change the authentication credential values (e.g. passwd).
1877: #
1.225 foxr 1878: #
1879: sub change_authentication_handler {
1880:
1881: my ($cmd, $tail, $client) = @_;
1882:
1883: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1884:
1885: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1886: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1887: if ($udom ne $currentdomainid) {
1888: &Failure( $client, "not_right_domain\n", $client);
1889: } else {
1890:
1891: chomp($npass);
1892:
1893: $npass=&unescape($npass);
1.261 foxr 1894: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1895: my $passfilename = &password_path($udom, $uname);
1896: if ($passfilename) { # Not allowed to create a new user!!
1.287 foxr 1897: # If just changing the unix passwd. need to arrange to run
1898: # passwd since otherwise make_passwd_file will run
1899: # lcuseradd which fails if an account already exists
1900: # (to prevent an unscrupulous LONCAPA admin from stealing
1901: # an existing account by overwriting it as a LonCAPA account).
1902:
1903: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1904: my $result = &change_unix_password($uname, $npass);
1905: &logthis("Result of password change for $uname: ".$result);
1906: if ($result eq "ok") {
1907: &Reply($client, "$result\n")
1.288 albertel 1908: } else {
1.287 foxr 1909: &Failure($client, "$result\n");
1910: }
1.288 albertel 1911: } else {
1.287 foxr 1912: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1913: #
1914: # If the current auth mode is internal, and the old auth mode was
1915: # unix, or krb*, and the user is an author for this domain,
1916: # re-run manage_permissions for that role in order to be able
1917: # to take ownership of the construction space back to www:www
1918: #
1919:
1920:
1921: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
1922: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1923: if(&is_author($udom, $uname)) {
1924: &Debug(" Need to manage author permissions...");
1925: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1926: }
1.261 foxr 1927: }
1.287 foxr 1928: &Reply($client, $result, $userinput);
1.261 foxr 1929: }
1930:
1931:
1.225 foxr 1932: } else {
1.251 foxr 1933: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1934: }
1935: }
1936: return 1;
1937: }
1938: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1939:
1940: #
1941: # Determines if this is the home server for a user. The home server
1942: # for a user will have his/her lon-capa passwd file. Therefore all we need
1943: # to do is determine if this file exists.
1944: #
1945: # Parameters:
1946: # $cmd - The command that got us here.
1947: # $tail - Tail of the command (remaining parameters).
1948: # $client - File descriptor connected to client.
1949: # Returns
1950: # 0 - Requested to exit, caller should shut down.
1951: # 1 - Continue processing.
1952: # Implicit inputs:
1953: # The authentication systems describe above have their own forms of implicit
1954: # input into the authentication process that are described above.
1955: #
1956: sub is_home_handler {
1957: my ($cmd, $tail, $client) = @_;
1958:
1959: my $userinput = "$cmd:$tail";
1960:
1961: my ($udom,$uname)=split(/:/,$tail);
1962: chomp($uname);
1963: my $passfile = &password_filename($udom, $uname);
1964: if($passfile) {
1965: &Reply( $client, "found\n", $userinput);
1966: } else {
1967: &Failure($client, "not_found\n", $userinput);
1968: }
1969: return 1;
1970: }
1971: ®ister_handler("home", \&is_home_handler, 0,1,0);
1972:
1973: #
1974: # Process an update request for a resource?? I think what's going on here is
1975: # that a resource has been modified that we hold a subscription to.
1976: # If the resource is not local, then we must update, or at least invalidate our
1977: # cached copy of the resource.
1978: # FUTURE WORK:
1979: # I need to look at this logic carefully. My druthers would be to follow
1980: # typical caching logic, and simple invalidate the cache, drop any subscription
1981: # an let the next fetch start the ball rolling again... however that may
1982: # actually be more difficult than it looks given the complex web of
1983: # proxy servers.
1984: # Parameters:
1985: # $cmd - The command that got us here.
1986: # $tail - Tail of the command (remaining parameters).
1987: # $client - File descriptor connected to client.
1988: # Returns
1989: # 0 - Requested to exit, caller should shut down.
1990: # 1 - Continue processing.
1991: # Implicit inputs:
1992: # The authentication systems describe above have their own forms of implicit
1993: # input into the authentication process that are described above.
1994: #
1995: sub update_resource_handler {
1996:
1997: my ($cmd, $tail, $client) = @_;
1998:
1999: my $userinput = "$cmd:$tail";
2000:
2001: my $fname= $tail; # This allows interactive testing
2002:
2003:
2004: my $ownership=ishome($fname);
2005: if ($ownership eq 'not_owner') {
2006: if (-e $fname) {
2007: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2008: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2009: my $now=time;
2010: my $since=$now-$atime;
2011: if ($since>$perlvar{'lonExpire'}) {
2012: my $reply=&reply("unsub:$fname","$clientname");
1.308 albertel 2013: &devalidate_meta_cache($fname);
1.225 foxr 2014: unlink("$fname");
2015: } else {
2016: my $transname="$fname.in.transfer";
2017: my $remoteurl=&reply("sub:$fname","$clientname");
2018: my $response;
2019: alarm(120);
2020: {
2021: my $ua=new LWP::UserAgent;
2022: my $request=new HTTP::Request('GET',"$remoteurl");
2023: $response=$ua->request($request,$transname);
2024: }
2025: alarm(0);
2026: if ($response->is_error()) {
2027: unlink($transname);
2028: my $message=$response->status_line;
2029: &logthis("LWP GET: $message for $fname ($remoteurl)");
2030: } else {
2031: if ($remoteurl!~/\.meta$/) {
2032: alarm(120);
2033: {
2034: my $ua=new LWP::UserAgent;
2035: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2036: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2037: if ($mresponse->is_error()) {
2038: unlink($fname.'.meta');
2039: }
2040: }
2041: alarm(0);
2042: }
2043: rename($transname,$fname);
1.308 albertel 2044: &devalidate_meta_cache($fname);
1.225 foxr 2045: }
2046: }
2047: &Reply( $client, "ok\n", $userinput);
2048: } else {
2049: &Failure($client, "not_found\n", $userinput);
2050: }
2051: } else {
2052: &Failure($client, "rejected\n", $userinput);
2053: }
2054: return 1;
2055: }
2056: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2057:
1.308 albertel 2058: sub devalidate_meta_cache {
2059: my ($url) = @_;
2060: use Cache::Memcached;
2061: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2062: $url = &declutter($url);
2063: $url =~ s-\.meta$--;
2064: my $id = &escape('meta:'.$url);
2065: $memcache->delete($id);
2066: }
2067:
2068: sub declutter {
2069: my $thisfn=shift;
2070: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
2071: $thisfn=~s/^\///;
2072: $thisfn=~s|^adm/wrapper/||;
2073: $thisfn=~s|^adm/coursedocs/showdoc/||;
2074: $thisfn=~s/^res\///;
2075: $thisfn=~s/\?.+$//;
2076: return $thisfn;
2077: }
1.225 foxr 2078: #
1.226 foxr 2079: # Fetch a user file from a remote server to the user's home directory
2080: # userfiles subdir.
1.225 foxr 2081: # Parameters:
2082: # $cmd - The command that got us here.
2083: # $tail - Tail of the command (remaining parameters).
2084: # $client - File descriptor connected to client.
2085: # Returns
2086: # 0 - Requested to exit, caller should shut down.
2087: # 1 - Continue processing.
2088: #
2089: sub fetch_user_file_handler {
2090:
2091: my ($cmd, $tail, $client) = @_;
2092:
2093: my $userinput = "$cmd:$tail";
2094: my $fname = $tail;
1.232 foxr 2095: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 2096: my $udir=&propath($udom,$uname).'/userfiles';
2097: unless (-e $udir) {
2098: mkdir($udir,0770);
2099: }
1.232 foxr 2100: Debug("fetch user file for $fname");
1.225 foxr 2101: if (-e $udir) {
2102: $ufile=~s/^[\.\~]+//;
1.232 foxr 2103:
2104: # IF necessary, create the path right down to the file.
2105: # Note that any regular files in the way of this path are
2106: # wiped out to deal with some earlier folly of mine.
2107:
1.267 raeburn 2108: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 2109: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 2110: }
2111:
1.225 foxr 2112: my $destname=$udir.'/'.$ufile;
2113: my $transname=$udir.'/'.$ufile.'.in.transit';
2114: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2115: my $response;
1.232 foxr 2116: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 2117: alarm(120);
2118: {
2119: my $ua=new LWP::UserAgent;
2120: my $request=new HTTP::Request('GET',"$remoteurl");
2121: $response=$ua->request($request,$transname);
2122: }
2123: alarm(0);
2124: if ($response->is_error()) {
2125: unlink($transname);
2126: my $message=$response->status_line;
2127: &logthis("LWP GET: $message for $fname ($remoteurl)");
2128: &Failure($client, "failed\n", $userinput);
2129: } else {
1.232 foxr 2130: Debug("Renaming $transname to $destname");
1.225 foxr 2131: if (!rename($transname,$destname)) {
2132: &logthis("Unable to move $transname to $destname");
2133: unlink($transname);
2134: &Failure($client, "failed\n", $userinput);
2135: } else {
2136: &Reply($client, "ok\n", $userinput);
2137: }
2138: }
2139: } else {
2140: &Failure($client, "not_home\n", $userinput);
2141: }
2142: return 1;
2143: }
2144: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2145:
1.226 foxr 2146: #
2147: # Remove a file from a user's home directory userfiles subdirectory.
2148: # Parameters:
2149: # cmd - the Lond request keyword that got us here.
2150: # tail - the part of the command past the keyword.
2151: # client- File descriptor connected with the client.
2152: #
2153: # Returns:
2154: # 1 - Continue processing.
2155: sub remove_user_file_handler {
2156: my ($cmd, $tail, $client) = @_;
2157:
2158: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2159:
2160: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2161: if ($ufile =~m|/\.\./|) {
2162: # any files paths with /../ in them refuse
2163: # to deal with
2164: &Failure($client, "refused\n", "$cmd:$tail");
2165: } else {
2166: my $udir = &propath($udom,$uname);
2167: if (-e $udir) {
2168: my $file=$udir.'/userfiles/'.$ufile;
2169: if (-e $file) {
1.253 foxr 2170: #
2171: # If the file is a regular file unlink is fine...
2172: # However it's possible the client wants a dir.
2173: # removed, in which case rmdir is more approprate:
2174: #
1.240 banghart 2175: if (-f $file){
1.241 albertel 2176: unlink($file);
2177: } elsif(-d $file) {
2178: rmdir($file);
1.240 banghart 2179: }
1.226 foxr 2180: if (-e $file) {
1.253 foxr 2181: # File is still there after we deleted it ?!?
2182:
1.226 foxr 2183: &Failure($client, "failed\n", "$cmd:$tail");
2184: } else {
2185: &Reply($client, "ok\n", "$cmd:$tail");
2186: }
2187: } else {
2188: &Failure($client, "not_found\n", "$cmd:$tail");
2189: }
2190: } else {
2191: &Failure($client, "not_home\n", "$cmd:$tail");
2192: }
2193: }
2194: return 1;
2195: }
2196: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2197:
1.236 albertel 2198: #
2199: # make a directory in a user's home directory userfiles subdirectory.
2200: # Parameters:
2201: # cmd - the Lond request keyword that got us here.
2202: # tail - the part of the command past the keyword.
2203: # client- File descriptor connected with the client.
2204: #
2205: # Returns:
2206: # 1 - Continue processing.
2207: sub mkdir_user_file_handler {
2208: my ($cmd, $tail, $client) = @_;
2209:
2210: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2211: $dir=&unescape($dir);
2212: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2213: if ($ufile =~m|/\.\./|) {
2214: # any files paths with /../ in them refuse
2215: # to deal with
2216: &Failure($client, "refused\n", "$cmd:$tail");
2217: } else {
2218: my $udir = &propath($udom,$uname);
2219: if (-e $udir) {
1.264 albertel 2220: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2221: if (!&mkpath($newdir)) {
2222: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2223: }
1.264 albertel 2224: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2225: } else {
2226: &Failure($client, "not_home\n", "$cmd:$tail");
2227: }
2228: }
2229: return 1;
2230: }
2231: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2232:
1.237 albertel 2233: #
2234: # rename a file in a user's home directory userfiles subdirectory.
2235: # Parameters:
2236: # cmd - the Lond request keyword that got us here.
2237: # tail - the part of the command past the keyword.
2238: # client- File descriptor connected with the client.
2239: #
2240: # Returns:
2241: # 1 - Continue processing.
2242: sub rename_user_file_handler {
2243: my ($cmd, $tail, $client) = @_;
2244:
2245: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2246: $old=&unescape($old);
2247: $new=&unescape($new);
2248: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2249: # any files paths with /../ in them refuse to deal with
2250: &Failure($client, "refused\n", "$cmd:$tail");
2251: } else {
2252: my $udir = &propath($udom,$uname);
2253: if (-e $udir) {
2254: my $oldfile=$udir.'/userfiles/'.$old;
2255: my $newfile=$udir.'/userfiles/'.$new;
2256: if (-e $newfile) {
2257: &Failure($client, "exists\n", "$cmd:$tail");
2258: } elsif (! -e $oldfile) {
2259: &Failure($client, "not_found\n", "$cmd:$tail");
2260: } else {
2261: if (!rename($oldfile,$newfile)) {
2262: &Failure($client, "failed\n", "$cmd:$tail");
2263: } else {
2264: &Reply($client, "ok\n", "$cmd:$tail");
2265: }
2266: }
2267: } else {
2268: &Failure($client, "not_home\n", "$cmd:$tail");
2269: }
2270: }
2271: return 1;
2272: }
2273: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2274:
1.227 foxr 2275: #
1.263 albertel 2276: # Authenticate access to a user file by checking that the token the user's
2277: # passed also exists in their session file
1.227 foxr 2278: #
2279: # Parameters:
2280: # cmd - The request keyword that dispatched to tus.
2281: # tail - The tail of the request (colon separated parameters).
2282: # client - Filehandle open on the client.
2283: # Return:
2284: # 1.
2285: sub token_auth_user_file_handler {
2286: my ($cmd, $tail, $client) = @_;
2287:
2288: my ($fname, $session) = split(/:/, $tail);
2289:
2290: chomp($session);
1.251 foxr 2291: my $reply="non_auth\n";
1.227 foxr 2292: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2293: $session.'.id')) {
2294: while (my $line=<ENVIN>) {
1.251 foxr 2295: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }
1.227 foxr 2296: }
2297: close(ENVIN);
1.251 foxr 2298: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2299: } else {
2300: &Failure($client, "invalid_token\n", "$cmd:$tail");
2301: }
2302: return 1;
2303:
2304: }
2305: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2306:
2307: #
2308: # Unsubscribe from a resource.
2309: #
2310: # Parameters:
2311: # $cmd - The command that got us here.
2312: # $tail - Tail of the command (remaining parameters).
2313: # $client - File descriptor connected to client.
2314: # Returns
2315: # 0 - Requested to exit, caller should shut down.
2316: # 1 - Continue processing.
2317: #
2318: sub unsubscribe_handler {
2319: my ($cmd, $tail, $client) = @_;
2320:
2321: my $userinput= "$cmd:$tail";
2322:
2323: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2324:
2325: &Debug("Unsubscribing $fname");
2326: if (-e $fname) {
2327: &Debug("Exists");
2328: &Reply($client, &unsub($fname,$clientip), $userinput);
2329: } else {
2330: &Failure($client, "not_found\n", $userinput);
2331: }
2332: return 1;
2333: }
2334: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2335:
1.230 foxr 2336: # Subscribe to a resource
2337: #
2338: # Parameters:
2339: # $cmd - The command that got us here.
2340: # $tail - Tail of the command (remaining parameters).
2341: # $client - File descriptor connected to client.
2342: # Returns
2343: # 0 - Requested to exit, caller should shut down.
2344: # 1 - Continue processing.
2345: #
2346: sub subscribe_handler {
2347: my ($cmd, $tail, $client)= @_;
2348:
2349: my $userinput = "$cmd:$tail";
2350:
2351: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2352:
2353: return 1;
2354: }
2355: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2356:
2357: #
2358: # Determine the version of a resource (?) Or is it return
2359: # the top version of the resource? Not yet clear from the
2360: # code in currentversion.
2361: #
2362: # Parameters:
2363: # $cmd - The command that got us here.
2364: # $tail - Tail of the command (remaining parameters).
2365: # $client - File descriptor connected to client.
2366: # Returns
2367: # 0 - Requested to exit, caller should shut down.
2368: # 1 - Continue processing.
2369: #
2370: sub current_version_handler {
2371: my ($cmd, $tail, $client) = @_;
2372:
2373: my $userinput= "$cmd:$tail";
2374:
2375: my $fname = $tail;
2376: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2377: return 1;
2378:
2379: }
2380: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2381:
2382: # Make an entry in a user's activity log.
2383: #
2384: # Parameters:
2385: # $cmd - The command that got us here.
2386: # $tail - Tail of the command (remaining parameters).
2387: # $client - File descriptor connected to client.
2388: # Returns
2389: # 0 - Requested to exit, caller should shut down.
2390: # 1 - Continue processing.
2391: #
2392: sub activity_log_handler {
2393: my ($cmd, $tail, $client) = @_;
2394:
2395:
2396: my $userinput= "$cmd:$tail";
2397:
2398: my ($udom,$uname,$what)=split(/:/,$tail);
2399: chomp($what);
2400: my $proname=&propath($udom,$uname);
2401: my $now=time;
2402: my $hfh;
2403: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2404: print $hfh "$now:$clientname:$what\n";
2405: &Reply( $client, "ok\n", $userinput);
2406: } else {
2407: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2408: ."while attempting log\n",
2409: $userinput);
2410: }
2411:
2412: return 1;
2413: }
1.263 albertel 2414: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2415:
2416: #
2417: # Put a namespace entry in a user profile hash.
2418: # My druthers would be for this to be an encrypted interaction too.
2419: # anything that might be an inadvertent covert channel about either
2420: # user authentication or user personal information....
2421: #
2422: # Parameters:
2423: # $cmd - The command that got us here.
2424: # $tail - Tail of the command (remaining parameters).
2425: # $client - File descriptor connected to client.
2426: # Returns
2427: # 0 - Requested to exit, caller should shut down.
2428: # 1 - Continue processing.
2429: #
2430: sub put_user_profile_entry {
2431: my ($cmd, $tail, $client) = @_;
1.229 foxr 2432:
1.230 foxr 2433: my $userinput = "$cmd:$tail";
2434:
1.242 raeburn 2435: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2436: if ($namespace ne 'roles') {
2437: chomp($what);
2438: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2439: &GDBM_WRCREAT(),"P",$what);
2440: if($hashref) {
2441: my @pairs=split(/\&/,$what);
2442: foreach my $pair (@pairs) {
2443: my ($key,$value)=split(/=/,$pair);
2444: $hashref->{$key}=$value;
2445: }
1.311 albertel 2446: if (&untie_user_hash($hashref)) {
1.230 foxr 2447: &Reply( $client, "ok\n", $userinput);
2448: } else {
2449: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2450: "while attempting put\n",
2451: $userinput);
2452: }
2453: } else {
1.316 albertel 2454: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230 foxr 2455: "while attempting put\n", $userinput);
2456: }
2457: } else {
2458: &Failure( $client, "refused\n", $userinput);
2459: }
2460:
2461: return 1;
2462: }
2463: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2464:
1.283 albertel 2465: # Put a piece of new data in hash, returns error if entry already exists
2466: # Parameters:
2467: # $cmd - The command that got us here.
2468: # $tail - Tail of the command (remaining parameters).
2469: # $client - File descriptor connected to client.
2470: # Returns
2471: # 0 - Requested to exit, caller should shut down.
2472: # 1 - Continue processing.
2473: #
2474: sub newput_user_profile_entry {
2475: my ($cmd, $tail, $client) = @_;
2476:
2477: my $userinput = "$cmd:$tail";
2478:
2479: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2480: if ($namespace eq 'roles') {
2481: &Failure( $client, "refused\n", $userinput);
2482: return 1;
2483: }
2484:
2485: chomp($what);
2486:
2487: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2488: &GDBM_WRCREAT(),"N",$what);
2489: if(!$hashref) {
1.316 albertel 2490: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283 albertel 2491: "while attempting put\n", $userinput);
2492: return 1;
2493: }
2494:
2495: my @pairs=split(/\&/,$what);
2496: foreach my $pair (@pairs) {
2497: my ($key,$value)=split(/=/,$pair);
2498: if (exists($hashref->{$key})) {
2499: &Failure($client, "key_exists: ".$key."\n",$userinput);
2500: return 1;
2501: }
2502: }
2503:
2504: foreach my $pair (@pairs) {
2505: my ($key,$value)=split(/=/,$pair);
2506: $hashref->{$key}=$value;
2507: }
2508:
1.311 albertel 2509: if (&untie_user_hash($hashref)) {
1.283 albertel 2510: &Reply( $client, "ok\n", $userinput);
2511: } else {
2512: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2513: "while attempting put\n",
2514: $userinput);
2515: }
2516: return 1;
2517: }
2518: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2519:
1.230 foxr 2520: #
2521: # Increment a profile entry in the user history file.
2522: # The history contains keyword value pairs. In this case,
2523: # The value itself is a pair of numbers. The first, the current value
2524: # the second an increment that this function applies to the current
2525: # value.
2526: #
2527: # Parameters:
2528: # $cmd - The command that got us here.
2529: # $tail - Tail of the command (remaining parameters).
2530: # $client - File descriptor connected to client.
2531: # Returns
2532: # 0 - Requested to exit, caller should shut down.
2533: # 1 - Continue processing.
2534: #
2535: sub increment_user_value_handler {
2536: my ($cmd, $tail, $client) = @_;
2537:
2538: my $userinput = "$cmd:$tail";
2539:
2540: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2541: if ($namespace ne 'roles') {
2542: chomp($what);
2543: my $hashref = &tie_user_hash($udom, $uname,
2544: $namespace, &GDBM_WRCREAT(),
2545: "P",$what);
2546: if ($hashref) {
2547: my @pairs=split(/\&/,$what);
2548: foreach my $pair (@pairs) {
2549: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2550: $value = &unescape($value);
1.230 foxr 2551: # We could check that we have a number...
2552: if (! defined($value) || $value eq '') {
2553: $value = 1;
2554: }
2555: $hashref->{$key}+=$value;
1.284 raeburn 2556: if ($namespace eq 'nohist_resourcetracker') {
2557: if ($hashref->{$key} < 0) {
2558: $hashref->{$key} = 0;
2559: }
2560: }
1.230 foxr 2561: }
1.311 albertel 2562: if (&untie_user_hash($hashref)) {
1.230 foxr 2563: &Reply( $client, "ok\n", $userinput);
2564: } else {
2565: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2566: "while attempting inc\n", $userinput);
2567: }
2568: } else {
2569: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2570: "while attempting inc\n", $userinput);
2571: }
2572: } else {
2573: &Failure($client, "refused\n", $userinput);
2574: }
2575:
2576: return 1;
2577: }
2578: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2579:
2580: #
2581: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2582: # Each 'role' a user has implies a set of permissions. Adding a new role
2583: # for a person grants the permissions packaged with that role
2584: # to that user when the role is selected.
2585: #
2586: # Parameters:
2587: # $cmd - The command string (rolesput).
2588: # $tail - The remainder of the request line. For rolesput this
2589: # consists of a colon separated list that contains:
2590: # The domain and user that is granting the role (logged).
2591: # The domain and user that is getting the role.
2592: # The roles being granted as a set of & separated pairs.
2593: # each pair a key value pair.
2594: # $client - File descriptor connected to the client.
2595: # Returns:
2596: # 0 - If the daemon should exit
2597: # 1 - To continue processing.
2598: #
2599: #
2600: sub roles_put_handler {
2601: my ($cmd, $tail, $client) = @_;
2602:
2603: my $userinput = "$cmd:$tail";
2604:
2605: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2606:
2607:
2608: my $namespace='roles';
2609: chomp($what);
2610: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2611: &GDBM_WRCREAT(), "P",
2612: "$exedom:$exeuser:$what");
2613: #
2614: # Log the attempt to set a role. The {}'s here ensure that the file
2615: # handle is open for the minimal amount of time. Since the flush
2616: # is done on close this improves the chances the log will be an un-
2617: # corrupted ordered thing.
2618: if ($hashref) {
1.261 foxr 2619: my $pass_entry = &get_auth_type($udom, $uname);
2620: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2621: $auth_type = $auth_type.":";
1.230 foxr 2622: my @pairs=split(/\&/,$what);
2623: foreach my $pair (@pairs) {
2624: my ($key,$value)=split(/=/,$pair);
2625: &manage_permissions($key, $udom, $uname,
1.260 foxr 2626: $auth_type);
1.230 foxr 2627: $hashref->{$key}=$value;
2628: }
1.311 albertel 2629: if (&untie_user_hash($hashref)) {
1.230 foxr 2630: &Reply($client, "ok\n", $userinput);
2631: } else {
2632: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2633: "while attempting rolesput\n", $userinput);
2634: }
2635: } else {
2636: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2637: "while attempting rolesput\n", $userinput);
2638: }
2639: return 1;
2640: }
2641: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2642:
2643: #
1.231 foxr 2644: # Deletes (removes) a role for a user. This is equivalent to removing
2645: # a permissions package associated with the role from the user's profile.
2646: #
2647: # Parameters:
2648: # $cmd - The command (rolesdel)
2649: # $tail - The remainder of the request line. This consists
2650: # of:
2651: # The domain and user requesting the change (logged)
2652: # The domain and user being changed.
2653: # The roles being revoked. These are shipped to us
2654: # as a bunch of & separated role name keywords.
2655: # $client - The file handle open on the client.
2656: # Returns:
2657: # 1 - Continue processing
2658: # 0 - Exit.
2659: #
2660: sub roles_delete_handler {
2661: my ($cmd, $tail, $client) = @_;
2662:
2663: my $userinput = "$cmd:$tail";
2664:
2665: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2666: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2667: "what = ".$what);
2668: my $namespace='roles';
2669: chomp($what);
2670: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2671: &GDBM_WRCREAT(), "D",
2672: "$exedom:$exeuser:$what");
2673:
2674: if ($hashref) {
2675: my @rolekeys=split(/\&/,$what);
2676:
2677: foreach my $key (@rolekeys) {
2678: delete $hashref->{$key};
2679: }
1.315 albertel 2680: if (&untie_user_hash($hashref)) {
1.231 foxr 2681: &Reply($client, "ok\n", $userinput);
2682: } else {
2683: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2684: "while attempting rolesdel\n", $userinput);
2685: }
2686: } else {
2687: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2688: "while attempting rolesdel\n", $userinput);
2689: }
2690:
2691: return 1;
2692: }
2693: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2694:
2695: # Unencrypted get from a user's profile database. See
2696: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2697: # This function retrieves a keyed item from a specific named database in the
2698: # user's directory.
2699: #
2700: # Parameters:
2701: # $cmd - Command request keyword (get).
2702: # $tail - Tail of the command. This is a colon separated list
2703: # consisting of the domain and username that uniquely
2704: # identifies the profile,
2705: # The 'namespace' which selects the gdbm file to
2706: # do the lookup in,
2707: # & separated list of keys to lookup. Note that
2708: # the values are returned as an & separated list too.
2709: # $client - File descriptor open on the client.
2710: # Returns:
2711: # 1 - Continue processing.
2712: # 0 - Exit.
2713: #
2714: sub get_profile_entry {
2715: my ($cmd, $tail, $client) = @_;
2716:
2717: my $userinput= "$cmd:$tail";
2718:
2719: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2720: chomp($what);
1.255 foxr 2721:
2722: my $replystring = read_profile($udom, $uname, $namespace, $what);
2723: my ($first) = split(/:/,$replystring);
2724: if($first ne "error") {
2725: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2726: } else {
1.255 foxr 2727: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2728: }
2729: return 1;
1.255 foxr 2730:
2731:
1.231 foxr 2732: }
2733: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2734:
2735: #
2736: # Process the encrypted get request. Note that the request is sent
2737: # in clear, but the reply is encrypted. This is a small covert channel:
2738: # information about the sensitive keys is given to the snooper. Just not
2739: # information about the values of the sensitive key. Hmm if I wanted to
2740: # know these I'd snoop for the egets. Get the profile item names from them
2741: # and then issue a get for them since there's no enforcement of the
2742: # requirement of an encrypted get for particular profile items. If I
2743: # were re-doing this, I'd force the request to be encrypted as well as the
2744: # reply. I'd also just enforce encrypted transactions for all gets since
2745: # that would prevent any covert channel snooping.
2746: #
2747: # Parameters:
2748: # $cmd - Command keyword of request (eget).
2749: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2750: # $client - File open on the client.
2751: # Returns:
2752: # 1 - Continue processing
2753: # 0 - server should exit.
2754: sub get_profile_entry_encrypted {
2755: my ($cmd, $tail, $client) = @_;
2756:
2757: my $userinput = "$cmd:$tail";
2758:
2759: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2760: chomp($what);
1.255 foxr 2761: my $qresult = read_profile($udom, $uname, $namespace, $what);
2762: my ($first) = split(/:/, $qresult);
2763: if($first ne "error") {
2764:
2765: if ($cipher) {
2766: my $cmdlength=length($qresult);
2767: $qresult.=" ";
2768: my $encqresult='';
2769: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2770: $encqresult.= unpack("H16",
2771: $cipher->encrypt(substr($qresult,
2772: $encidx,
2773: 8)));
2774: }
2775: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2776: } else {
1.231 foxr 2777: &Failure( $client, "error:no_key\n", $userinput);
2778: }
2779: } else {
1.255 foxr 2780: &Failure($client, "$qresult while attempting eget\n", $userinput);
2781:
1.231 foxr 2782: }
2783:
2784: return 1;
2785: }
1.255 foxr 2786: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2787:
1.231 foxr 2788: #
2789: # Deletes a key in a user profile database.
2790: #
2791: # Parameters:
2792: # $cmd - Command keyword (del).
2793: # $tail - Command tail. IN this case a colon
2794: # separated list containing:
2795: # The domain and user that identifies uniquely
2796: # the identity of the user.
2797: # The profile namespace (name of the profile
2798: # database file).
2799: # & separated list of keywords to delete.
2800: # $client - File open on client socket.
2801: # Returns:
2802: # 1 - Continue processing
2803: # 0 - Exit server.
2804: #
2805: #
2806: sub delete_profile_entry {
2807: my ($cmd, $tail, $client) = @_;
2808:
2809: my $userinput = "cmd:$tail";
2810:
2811: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2812: chomp($what);
2813: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2814: &GDBM_WRCREAT(),
2815: "D",$what);
2816: if ($hashref) {
2817: my @keys=split(/\&/,$what);
2818: foreach my $key (@keys) {
2819: delete($hashref->{$key});
2820: }
1.315 albertel 2821: if (&untie_user_hash($hashref)) {
1.231 foxr 2822: &Reply($client, "ok\n", $userinput);
2823: } else {
2824: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2825: "while attempting del\n", $userinput);
2826: }
2827: } else {
2828: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2829: "while attempting del\n", $userinput);
2830: }
2831: return 1;
2832: }
2833: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2834:
1.231 foxr 2835: #
2836: # List the set of keys that are defined in a profile database file.
2837: # A successful reply from this will contain an & separated list of
2838: # the keys.
2839: # Parameters:
2840: # $cmd - Command request (keys).
2841: # $tail - Remainder of the request, a colon separated
2842: # list containing domain/user that identifies the
2843: # user being queried, and the database namespace
2844: # (database filename essentially).
2845: # $client - File open on the client.
2846: # Returns:
2847: # 1 - Continue processing.
2848: # 0 - Exit the server.
2849: #
2850: sub get_profile_keys {
2851: my ($cmd, $tail, $client) = @_;
2852:
2853: my $userinput = "$cmd:$tail";
2854:
2855: my ($udom,$uname,$namespace)=split(/:/,$tail);
2856: my $qresult='';
2857: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2858: &GDBM_READER());
2859: if ($hashref) {
2860: foreach my $key (keys %$hashref) {
2861: $qresult.="$key&";
2862: }
1.315 albertel 2863: if (&untie_user_hash($hashref)) {
1.231 foxr 2864: $qresult=~s/\&$//;
2865: &Reply($client, "$qresult\n", $userinput);
2866: } else {
2867: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2868: "while attempting keys\n", $userinput);
2869: }
2870: } else {
2871: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2872: "while attempting keys\n", $userinput);
2873: }
2874:
2875: return 1;
2876: }
2877: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2878:
2879: #
2880: # Dump the contents of a user profile database.
2881: # Note that this constitutes a very large covert channel too since
2882: # the dump will return sensitive information that is not encrypted.
2883: # The naive security assumption is that the session negotiation ensures
2884: # our client is trusted and I don't believe that's assured at present.
2885: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2886: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2887: #
2888: # Parameters:
2889: # $cmd - The command request keyword (currentdump).
2890: # $tail - Remainder of the request, consisting of a colon
2891: # separated list that has the domain/username and
2892: # the namespace to dump (database file).
2893: # $client - file open on the remote client.
2894: # Returns:
2895: # 1 - Continue processing.
2896: # 0 - Exit the server.
2897: #
2898: sub dump_profile_database {
2899: my ($cmd, $tail, $client) = @_;
2900:
2901: my $userinput = "$cmd:$tail";
2902:
2903: my ($udom,$uname,$namespace) = split(/:/,$tail);
2904: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2905: &GDBM_READER());
2906: if ($hashref) {
2907: # Structure of %data:
2908: # $data{$symb}->{$parameter}=$value;
2909: # $data{$symb}->{'v.'.$parameter}=$version;
2910: # since $parameter will be unescaped, we do not
2911: # have to worry about silly parameter names...
2912:
2913: my $qresult='';
2914: my %data = (); # A hash of anonymous hashes..
2915: while (my ($key,$value) = each(%$hashref)) {
2916: my ($v,$symb,$param) = split(/:/,$key);
2917: next if ($v eq 'version' || $symb eq 'keys');
1.318.2.3! albertel 2918: if (!defined($param)) {
! 2919: foreach my $pair (split(/\&/,$value)) {
! 2920: my ($param,$value)=split(/=/,$pair);
! 2921: next if (exists($data{$symb}) &&
! 2922: exists($data{$symb}->{$param}) &&
! 2923: $data{$symb}->{'v.'.$param} > $v);
! 2924: $data{$symb}->{$param}=$value;
! 2925: $data{$symb}->{'v.'.$param}=$v;
! 2926: }
! 2927: } else {
! 2928: next if (exists($data{$symb}) &&
! 2929: exists($data{$symb}->{$param}) &&
! 2930: $data{$symb}->{'v.'.$param} > $v);
! 2931: $data{$symb}->{$param}=$value;
! 2932: $data{$symb}->{'v.'.$param}=$v;
! 2933: }
1.231 foxr 2934: }
1.311 albertel 2935: if (&untie_user_hash($hashref)) {
1.231 foxr 2936: while (my ($symb,$param_hash) = each(%data)) {
2937: while(my ($param,$value) = each (%$param_hash)){
2938: next if ($param =~ /^v\./); # Ignore versions...
2939: #
2940: # Just dump the symb=value pairs separated by &
2941: #
2942: $qresult.=$symb.':'.$param.'='.$value.'&';
2943: }
2944: }
2945: chop($qresult);
2946: &Reply($client , "$qresult\n", $userinput);
2947: } else {
2948: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2949: "while attempting currentdump\n", $userinput);
2950: }
2951: } else {
2952: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2953: "while attempting currentdump\n", $userinput);
2954: }
2955:
2956: return 1;
2957: }
2958: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2959:
2960: #
2961: # Dump a profile database with an optional regular expression
2962: # to match against the keys. In this dump, no effort is made
2963: # to separate symb from version information. Presumably the
2964: # databases that are dumped by this command are of a different
2965: # structure. Need to look at this and improve the documentation of
2966: # both this and the currentdump handler.
2967: # Parameters:
2968: # $cmd - The command keyword.
2969: # $tail - All of the characters after the $cmd:
2970: # These are expected to be a colon
2971: # separated list containing:
2972: # domain/user - identifying the user.
2973: # namespace - identifying the database.
2974: # regexp - optional regular expression
2975: # that is matched against
2976: # database keywords to do
2977: # selective dumps.
2978: # $client - Channel open on the client.
2979: # Returns:
2980: # 1 - Continue processing.
2981: # Side effects:
2982: # response is written to $client.
2983: #
2984: sub dump_with_regexp {
2985: my ($cmd, $tail, $client) = @_;
2986:
2987:
2988: my $userinput = "$cmd:$tail";
2989:
1.306 albertel 2990: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 2991: if (defined($regexp)) {
2992: $regexp=&unescape($regexp);
2993: } else {
2994: $regexp='.';
2995: }
1.306 albertel 2996: my ($start,$end);
2997: if (defined($range)) {
2998: if ($range =~/^(\d+)\-(\d+)$/) {
2999: ($start,$end) = ($1,$2);
3000: } elsif ($range =~/^(\d+)$/) {
3001: ($start,$end) = (0,$1);
3002: } else {
3003: undef($range);
3004: }
3005: }
1.231 foxr 3006: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3007: &GDBM_READER());
3008: if ($hashref) {
3009: my $qresult='';
1.306 albertel 3010: my $count=0;
1.231 foxr 3011: while (my ($key,$value) = each(%$hashref)) {
3012: if ($regexp eq '.') {
1.306 albertel 3013: $count++;
3014: if (defined($range) && $count >= $end) { last; }
3015: if (defined($range) && $count < $start) { next; }
1.231 foxr 3016: $qresult.=$key.'='.$value.'&';
3017: } else {
3018: my $unescapeKey = &unescape($key);
3019: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 3020: $count++;
3021: if (defined($range) && $count >= $end) { last; }
3022: if (defined($range) && $count < $start) { next; }
1.231 foxr 3023: $qresult.="$key=$value&";
3024: }
3025: }
3026: }
1.311 albertel 3027: if (&untie_user_hash($hashref)) {
1.231 foxr 3028: chop($qresult);
3029: &Reply($client, "$qresult\n", $userinput);
3030: } else {
3031: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3032: "while attempting dump\n", $userinput);
3033: }
3034: } else {
3035: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3036: "while attempting dump\n", $userinput);
3037: }
3038:
3039: return 1;
3040: }
3041: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3042:
3043: # Store a set of key=value pairs associated with a versioned name.
3044: #
3045: # Parameters:
3046: # $cmd - Request command keyword.
3047: # $tail - Tail of the request. This is a colon
3048: # separated list containing:
3049: # domain/user - User and authentication domain.
3050: # namespace - Name of the database being modified
3051: # rid - Resource keyword to modify.
3052: # what - new value associated with rid.
3053: #
3054: # $client - Socket open on the client.
3055: #
3056: #
3057: # Returns:
3058: # 1 (keep on processing).
3059: # Side-Effects:
3060: # Writes to the client
3061: sub store_handler {
3062: my ($cmd, $tail, $client) = @_;
3063:
3064: my $userinput = "$cmd:$tail";
3065:
3066: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3067: if ($namespace ne 'roles') {
3068:
3069: chomp($what);
3070: my @pairs=split(/\&/,$what);
3071: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 3072: &GDBM_WRCREAT(), "S",
1.231 foxr 3073: "$rid:$what");
3074: if ($hashref) {
3075: my $now = time;
3076: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3077: my $key;
3078: $hashref->{"version:$rid"}++;
3079: my $version=$hashref->{"version:$rid"};
3080: my $allkeys='';
3081: foreach my $pair (@pairs) {
1.318.2.1 albertel 3082: my ($key)=split(/=/,$pair);
1.231 foxr 3083: $allkeys.=$key.':';
3084: }
1.318.2.2 albertel 3085: $hashref->{"$version:$rid"}=$what."\×tamp=$now";
1.231 foxr 3086: $allkeys.='timestamp';
3087: $hashref->{"$version:keys:$rid"}=$allkeys;
1.311 albertel 3088: if (&untie_user_hash($hashref)) {
1.231 foxr 3089: &Reply($client, "ok\n", $userinput);
3090: } else {
3091: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3092: "while attempting store\n", $userinput);
3093: }
3094: } else {
3095: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3096: "while attempting store\n", $userinput);
3097: }
3098: } else {
3099: &Failure($client, "refused\n", $userinput);
3100: }
3101:
3102: return 1;
3103: }
3104: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 3105:
1.231 foxr 3106: #
3107: # Dump out all versions of a resource that has key=value pairs associated
3108: # with it for each version. These resources are built up via the store
3109: # command.
3110: #
3111: # Parameters:
3112: # $cmd - Command keyword.
3113: # $tail - Remainder of the request which consists of:
3114: # domain/user - User and auth. domain.
3115: # namespace - name of resource database.
3116: # rid - Resource id.
3117: # $client - socket open on the client.
3118: #
3119: # Returns:
3120: # 1 indicating the caller should not yet exit.
3121: # Side-effects:
3122: # Writes a reply to the client.
3123: # The reply is a string of the following shape:
3124: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3125: # Where the 1 above represents version 1.
3126: # this continues for all pairs of keys in all versions.
3127: #
3128: #
3129: #
3130: #
3131: sub restore_handler {
3132: my ($cmd, $tail, $client) = @_;
3133:
3134: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3135:
3136: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
3137: $namespace=~s/\//\_/g;
3138: $namespace=~s/\W//g;
3139: chomp($rid);
3140: my $qresult='';
1.309 albertel 3141: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3142: if ($hashref) {
3143: my $version=$hashref->{"version:$rid"};
1.231 foxr 3144: $qresult.="version=$version&";
3145: my $scope;
3146: for ($scope=1;$scope<=$version;$scope++) {
1.309 albertel 3147: my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231 foxr 3148: my @keys=split(/:/,$vkeys);
3149: my $key;
3150: $qresult.="$scope:keys=$vkeys&";
1.318.2.1 albertel 3151: if (exists($hashref->{"$scope:$rid"})) {
3152: my $what=$hashref->{"$scope:$rid"};
3153: foreach my $pair (split(/\&/,$hashref->{"$scope:$rid"})) {
3154: my ($key,$value)=split(/=/,$pair);
3155: $qresult.="$scope:".$pair."&";
3156: }
3157: } else {
3158: foreach $key (@keys) {
3159: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3160: }
3161: }
1.231 foxr 3162: }
1.311 albertel 3163: if (&untie_user_hash($hashref)) {
1.231 foxr 3164: $qresult=~s/\&$//;
3165: &Reply( $client, "$qresult\n", $userinput);
3166: } else {
3167: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3168: "while attempting restore\n", $userinput);
3169: }
3170: } else {
3171: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3172: "while attempting restore\n", $userinput);
3173: }
3174:
3175: return 1;
3176:
3177:
3178: }
3179: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3180:
3181: #
3182: # Add a chat message to to a discussion board.
3183: #
3184: # Parameters:
3185: # $cmd - Request keyword.
3186: # $tail - Tail of the command. A colon separated list
3187: # containing:
3188: # cdom - Domain on which the chat board lives
3189: # cnum - Identifier of the discussion group.
3190: # post - Body of the posting.
3191: # $client - Socket open on the client.
3192: # Returns:
3193: # 1 - Indicating caller should keep on processing.
3194: #
3195: # Side-effects:
3196: # writes a reply to the client.
3197: #
3198: #
3199: sub send_chat_handler {
3200: my ($cmd, $tail, $client) = @_;
3201:
3202:
3203: my $userinput = "$cmd:$tail";
3204:
3205: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
3206: &chat_add($cdom,$cnum,$newpost);
3207: &Reply($client, "ok\n", $userinput);
3208:
3209: return 1;
3210: }
3211: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3212:
1.234 foxr 3213: #
3214: # Retrieve the set of chat messagss from a discussion board.
3215: #
3216: # Parameters:
3217: # $cmd - Command keyword that initiated the request.
3218: # $tail - Remainder of the request after the command
3219: # keyword. In this case a colon separated list of
3220: # chat domain - Which discussion board.
3221: # chat id - Discussion thread(?)
3222: # domain/user - Authentication domain and username
3223: # of the requesting person.
3224: # $client - Socket open on the client program.
3225: # Returns:
3226: # 1 - continue processing
3227: # Side effects:
3228: # Response is written to the client.
3229: #
3230: sub retrieve_chat_handler {
3231: my ($cmd, $tail, $client) = @_;
3232:
3233:
3234: my $userinput = "$cmd:$tail";
3235:
3236: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
3237: my $reply='';
3238: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
3239: $reply.=&escape($_).':';
3240: }
3241: $reply=~s/\:$//;
3242: &Reply($client, $reply."\n", $userinput);
3243:
3244:
3245: return 1;
3246: }
3247: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3248:
3249: #
3250: # Initiate a query of an sql database. SQL query repsonses get put in
3251: # a file for later retrieval. This prevents sql query results from
3252: # bottlenecking the system. Note that with loncnew, perhaps this is
3253: # less of an issue since multiple outstanding requests can be concurrently
3254: # serviced.
3255: #
3256: # Parameters:
3257: # $cmd - COmmand keyword that initiated the request.
3258: # $tail - Remainder of the command after the keyword.
3259: # For this function, this consists of a query and
3260: # 3 arguments that are self-documentingly labelled
3261: # in the original arg1, arg2, arg3.
3262: # $client - Socket open on the client.
3263: # Return:
3264: # 1 - Indicating processing should continue.
3265: # Side-effects:
3266: # a reply is written to $client.
3267: #
3268: sub send_query_handler {
3269: my ($cmd, $tail, $client) = @_;
3270:
3271:
3272: my $userinput = "$cmd:$tail";
3273:
3274: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3275: $query=~s/\n*$//g;
3276: &Reply($client, "". &sql_reply("$clientname\&$query".
3277: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3278: $userinput);
3279:
3280: return 1;
3281: }
3282: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3283:
3284: #
3285: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3286: # The query is submitted via a "querysend" transaction.
3287: # There it is passed on to the lonsql daemon, queued and issued to
3288: # mysql.
3289: # This transaction is invoked when the sql transaction is complete
3290: # it stores the query results in flie and indicates query completion.
3291: # presumably local software then fetches this response... I'm guessing
3292: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3293: # lonsql on completion of the query interacts with the lond of our
3294: # client to do a query reply storing two files:
3295: # - id - The results of the query.
3296: # - id.end - Indicating the transaction completed.
3297: # NOTE: id is a unique id assigned to the query and querysend time.
3298: # Parameters:
3299: # $cmd - Command keyword that initiated this request.
3300: # $tail - Remainder of the tail. In this case that's a colon
3301: # separated list containing the query Id and the
3302: # results of the query.
3303: # $client - Socket open on the client.
3304: # Return:
3305: # 1 - Indicating that we should continue processing.
3306: # Side effects:
3307: # ok written to the client.
3308: #
3309: sub reply_query_handler {
3310: my ($cmd, $tail, $client) = @_;
3311:
3312:
3313: my $userinput = "$cmd:$tail";
3314:
3315: my ($cmd,$id,$reply)=split(/:/,$userinput);
3316: my $store;
3317: my $execdir=$perlvar{'lonDaemons'};
3318: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3319: $reply=~s/\&/\n/g;
3320: print $store $reply;
3321: close $store;
3322: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3323: print $store2 "done\n";
3324: close $store2;
3325: &Reply($client, "ok\n", $userinput);
3326: } else {
3327: &Failure($client, "error: ".($!+0)
3328: ." IO::File->new Failed ".
3329: "while attempting queryreply\n", $userinput);
3330: }
3331:
3332:
3333: return 1;
3334: }
3335: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3336:
3337: #
3338: # Process the courseidput request. Not quite sure what this means
3339: # at the system level sense. It appears a gdbm file in the
3340: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3341: # a set of entries made in that database.
3342: #
3343: # Parameters:
3344: # $cmd - The command keyword that initiated this request.
3345: # $tail - Tail of the command. In this case consists of a colon
3346: # separated list contaning the domain to apply this to and
3347: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3348: # Each value is a colon separated list that includes:
3349: # description, institutional code and course owner.
3350: # For backward compatibility with versions included
3351: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3352: # code and/or course owner are preserved from the existing
3353: # record when writing a new record in response to 1.1 or
3354: # 1.2 implementations of lonnet::flushcourselogs().
3355: #
1.234 foxr 3356: # $client - Socket open on the client.
3357: # Returns:
3358: # 1 - indicating that processing should continue
3359: #
3360: # Side effects:
3361: # reply is written to the client.
3362: #
3363: sub put_course_id_handler {
3364: my ($cmd, $tail, $client) = @_;
3365:
3366:
3367: my $userinput = "$cmd:$tail";
3368:
1.266 raeburn 3369: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3370: chomp($what);
3371: my $now=time;
3372: my @pairs=split(/\&/,$what);
3373:
3374: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3375: if ($hashref) {
3376: foreach my $pair (@pairs) {
1.271 raeburn 3377: my ($key,$courseinfo) = split(/=/,$pair,2);
3378: $courseinfo =~ s/=/:/g;
1.272 raeburn 3379:
1.273 albertel 3380: my @current_items = split(/:/,$hashref->{$key});
3381: shift(@current_items); # remove description
3382: pop(@current_items); # remove last access
1.272 raeburn 3383: my $numcurrent = scalar(@current_items);
3384:
1.273 albertel 3385: my @new_items = split(/:/,$courseinfo);
1.272 raeburn 3386: my $numnew = scalar(@new_items);
3387: if ($numcurrent > 0) {
3388: if ($numnew == 1) { # flushcourselogs() from 1.1 or earlier
3389: $courseinfo .= ':'.join(':',@current_items);
3390: } elsif ($numnew == 2) { # flushcourselogs() from 1.2.X
3391: $courseinfo .= ':'.$current_items[$numcurrent-1];
3392: }
3393: }
1.266 raeburn 3394: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3395: }
1.311 albertel 3396: if (&untie_domain_hash($hashref)) {
1.253 foxr 3397: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3398: } else {
1.253 foxr 3399: &Failure($client, "error: ".($!+0)
1.234 foxr 3400: ." untie(GDBM) Failed ".
3401: "while attempting courseidput\n", $userinput);
3402: }
3403: } else {
1.253 foxr 3404: &Failure($client, "error: ".($!+0)
1.234 foxr 3405: ." tie(GDBM) Failed ".
3406: "while attempting courseidput\n", $userinput);
3407: }
1.253 foxr 3408:
1.234 foxr 3409:
3410: return 1;
3411: }
3412: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3413:
3414: # Retrieves the value of a course id resource keyword pattern
3415: # defined since a starting date. Both the starting date and the
3416: # keyword pattern are optional. If the starting date is not supplied it
3417: # is treated as the beginning of time. If the pattern is not found,
3418: # it is treatred as "." matching everything.
3419: #
3420: # Parameters:
3421: # $cmd - Command keyword that resulted in us being dispatched.
3422: # $tail - The remainder of the command that, in this case, consists
3423: # of a colon separated list of:
3424: # domain - The domain in which the course database is
3425: # defined.
3426: # since - Optional parameter describing the minimum
3427: # time of definition(?) of the resources that
3428: # will match the dump.
3429: # description - regular expression that is used to filter
3430: # the dump. Only keywords matching this regexp
3431: # will be used.
1.272 raeburn 3432: # institutional code - optional supplied code to filter
3433: # the dump. Only courses with an institutional code
3434: # that match the supplied code will be returned.
3435: # owner - optional supplied username of owner to filter
3436: # the dump. Only courses for which the course
3437: # owner matches the supplied username will be
1.274 albertel 3438: # returned. Implicit assumption that owner
3439: # is a user in the domain in which the
3440: # course database is defined.
1.234 foxr 3441: # $client - The socket open on the client.
3442: # Returns:
3443: # 1 - Continue processing.
3444: # Side Effects:
3445: # a reply is written to $client.
3446: sub dump_course_id_handler {
3447: my ($cmd, $tail, $client) = @_;
3448:
3449: my $userinput = "$cmd:$tail";
3450:
1.282 raeburn 3451: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter) =split(/:/,$tail);
1.234 foxr 3452: if (defined($description)) {
3453: $description=&unescape($description);
3454: } else {
3455: $description='.';
3456: }
1.266 raeburn 3457: if (defined($instcodefilter)) {
3458: $instcodefilter=&unescape($instcodefilter);
3459: } else {
3460: $instcodefilter='.';
3461: }
3462: if (defined($ownerfilter)) {
3463: $ownerfilter=&unescape($ownerfilter);
3464: } else {
3465: $ownerfilter='.';
3466: }
1.282 raeburn 3467: if (defined($coursefilter)) {
3468: $coursefilter=&unescape($coursefilter);
3469: } else {
3470: $coursefilter='.';
3471: }
1.266 raeburn 3472:
1.234 foxr 3473: unless (defined($since)) { $since=0; }
3474: my $qresult='';
3475: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3476: if ($hashref) {
3477: while (my ($key,$value) = each(%$hashref)) {
1.266 raeburn 3478: my ($descr,$lasttime,$inst_code,$owner);
1.274 albertel 3479: my @courseitems = split(/:/,$value);
3480: $lasttime = pop(@courseitems);
3481: ($descr,$inst_code,$owner)=@courseitems;
1.234 foxr 3482: if ($lasttime<$since) { next; }
1.266 raeburn 3483: my $match = 1;
3484: unless ($description eq '.') {
3485: my $unescapeDescr = &unescape($descr);
3486: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3487: $match = 0;
1.234 foxr 3488: }
1.266 raeburn 3489: }
3490: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3491: my $unescapeInstcode = &unescape($inst_code);
3492: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3493: $match = 0;
3494: }
1.234 foxr 3495: }
1.266 raeburn 3496: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3497: my $unescapeOwner = &unescape($owner);
3498: unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
3499: $match = 0;
3500: }
3501: }
1.282 raeburn 3502: unless ($coursefilter eq '.' || !defined($coursefilter)) {
3503: my $unescapeCourse = &unescape($key);
3504: unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {
3505: $match = 0;
3506: }
3507: }
1.266 raeburn 3508: if ($match == 1) {
3509: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3510: }
1.234 foxr 3511: }
1.311 albertel 3512: if (&untie_domain_hash($hashref)) {
1.234 foxr 3513: chop($qresult);
3514: &Reply($client, "$qresult\n", $userinput);
3515: } else {
3516: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3517: "while attempting courseiddump\n", $userinput);
3518: }
3519: } else {
3520: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3521: "while attempting courseiddump\n", $userinput);
3522: }
3523:
3524:
3525: return 1;
3526: }
3527: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3528:
3529: #
3530: # Puts an id to a domains id database.
3531: #
3532: # Parameters:
3533: # $cmd - The command that triggered us.
3534: # $tail - Remainder of the request other than the command. This is a
3535: # colon separated list containing:
3536: # $domain - The domain for which we are writing the id.
3537: # $pairs - The id info to write... this is and & separated list
3538: # of keyword=value.
3539: # $client - Socket open on the client.
3540: # Returns:
3541: # 1 - Continue processing.
3542: # Side effects:
3543: # reply is written to $client.
3544: #
3545: sub put_id_handler {
3546: my ($cmd,$tail,$client) = @_;
3547:
3548:
3549: my $userinput = "$cmd:$tail";
3550:
3551: my ($udom,$what)=split(/:/,$tail);
3552: chomp($what);
3553: my @pairs=split(/\&/,$what);
3554: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3555: "P", $what);
3556: if ($hashref) {
3557: foreach my $pair (@pairs) {
3558: my ($key,$value)=split(/=/,$pair);
3559: $hashref->{$key}=$value;
3560: }
1.311 albertel 3561: if (&untie_domain_hash($hashref)) {
1.238 foxr 3562: &Reply($client, "ok\n", $userinput);
3563: } else {
3564: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3565: "while attempting idput\n", $userinput);
3566: }
3567: } else {
3568: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3569: "while attempting idput\n", $userinput);
3570: }
3571:
3572: return 1;
3573: }
1.263 albertel 3574: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3575:
3576: #
3577: # Retrieves a set of id values from the id database.
3578: # Returns an & separated list of results, one for each requested id to the
3579: # client.
3580: #
3581: # Parameters:
3582: # $cmd - Command keyword that caused us to be dispatched.
3583: # $tail - Tail of the command. Consists of a colon separated:
3584: # domain - the domain whose id table we dump
3585: # ids Consists of an & separated list of
3586: # id keywords whose values will be fetched.
3587: # nonexisting keywords will have an empty value.
3588: # $client - Socket open on the client.
3589: #
3590: # Returns:
3591: # 1 - indicating processing should continue.
3592: # Side effects:
3593: # An & separated list of results is written to $client.
3594: #
3595: sub get_id_handler {
3596: my ($cmd, $tail, $client) = @_;
3597:
3598:
3599: my $userinput = "$client:$tail";
3600:
3601: my ($udom,$what)=split(/:/,$tail);
3602: chomp($what);
3603: my @queries=split(/\&/,$what);
3604: my $qresult='';
3605: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3606: if ($hashref) {
3607: for (my $i=0;$i<=$#queries;$i++) {
3608: $qresult.="$hashref->{$queries[$i]}&";
3609: }
1.311 albertel 3610: if (&untie_domain_hash($hashref)) {
1.238 foxr 3611: $qresult=~s/\&$//;
3612: &Reply($client, "$qresult\n", $userinput);
3613: } else {
3614: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3615: "while attempting idget\n",$userinput);
3616: }
3617: } else {
3618: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3619: "while attempting idget\n",$userinput);
3620: }
3621:
3622: return 1;
3623: }
1.263 albertel 3624: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3625:
3626: #
1.299 raeburn 3627: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
3628: #
3629: # Parameters
3630: # $cmd - Command keyword that caused us to be dispatched.
3631: # $tail - Tail of the command. Consists of a colon separated:
3632: # domain - the domain whose dcmail we are recording
3633: # email Consists of key=value pair
3634: # where key is unique msgid
3635: # and value is message (in XML)
3636: # $client - Socket open on the client.
3637: #
3638: # Returns:
3639: # 1 - indicating processing should continue.
3640: # Side effects
3641: # reply is written to $client.
3642: #
3643: sub put_dcmail_handler {
3644: my ($cmd,$tail,$client) = @_;
3645: my $userinput = "$cmd:$tail";
3646:
3647: my ($udom,$what)=split(/:/,$tail);
3648: chomp($what);
3649: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3650: if ($hashref) {
3651: my ($key,$value)=split(/=/,$what);
3652: $hashref->{$key}=$value;
3653: }
1.311 albertel 3654: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3655: &Reply($client, "ok\n", $userinput);
3656: } else {
3657: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3658: "while attempting dcmailput\n", $userinput);
3659: }
3660: return 1;
3661: }
3662: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3663:
3664: #
3665: # Retrieves broadcast e-mail from nohist_dcmail database
3666: # Returns to client an & separated list of key=value pairs,
3667: # where key is msgid and value is message information.
3668: #
3669: # Parameters
3670: # $cmd - Command keyword that caused us to be dispatched.
3671: # $tail - Tail of the command. Consists of a colon separated:
3672: # domain - the domain whose dcmail table we dump
3673: # startfilter - beginning of time window
3674: # endfilter - end of time window
3675: # sendersfilter - & separated list of username:domain
3676: # for senders to search for.
3677: # $client - Socket open on the client.
3678: #
3679: # Returns:
3680: # 1 - indicating processing should continue.
3681: # Side effects
3682: # reply (& separated list of msgid=messageinfo pairs) is
3683: # written to $client.
3684: #
3685: sub dump_dcmail_handler {
3686: my ($cmd, $tail, $client) = @_;
3687:
3688: my $userinput = "$cmd:$tail";
3689: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3690: chomp($sendersfilter);
3691: my @senders = ();
3692: if (defined($startfilter)) {
3693: $startfilter=&unescape($startfilter);
3694: } else {
3695: $startfilter='.';
3696: }
3697: if (defined($endfilter)) {
3698: $endfilter=&unescape($endfilter);
3699: } else {
3700: $endfilter='.';
3701: }
3702: if (defined($sendersfilter)) {
3703: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 3704: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 3705: }
3706:
3707: my $qresult='';
3708: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3709: if ($hashref) {
3710: while (my ($key,$value) = each(%$hashref)) {
3711: my $match = 1;
1.303 albertel 3712: my ($timestamp,$subj,$uname,$udom) =
3713: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 3714: $subj = &unescape($subj);
3715: unless ($startfilter eq '.' || !defined($startfilter)) {
3716: if ($timestamp < $startfilter) {
3717: $match = 0;
3718: }
3719: }
3720: unless ($endfilter eq '.' || !defined($endfilter)) {
3721: if ($timestamp > $endfilter) {
3722: $match = 0;
3723: }
3724: }
3725: unless (@senders < 1) {
3726: unless (grep/^$uname:$udom$/,@senders) {
3727: $match = 0;
3728: }
3729: }
3730: if ($match == 1) {
3731: $qresult.=$key.'='.$value.'&';
3732: }
3733: }
1.311 albertel 3734: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3735: chop($qresult);
3736: &Reply($client, "$qresult\n", $userinput);
3737: } else {
3738: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3739: "while attempting dcmaildump\n", $userinput);
3740: }
3741: } else {
3742: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3743: "while attempting dcmaildump\n", $userinput);
3744: }
3745: return 1;
3746: }
3747:
3748: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3749:
3750: #
3751: # Puts domain roles in nohist_domainroles database
3752: #
3753: # Parameters
3754: # $cmd - Command keyword that caused us to be dispatched.
3755: # $tail - Tail of the command. Consists of a colon separated:
3756: # domain - the domain whose roles we are recording
3757: # role - Consists of key=value pair
3758: # where key is unique role
3759: # and value is start/end date information
3760: # $client - Socket open on the client.
3761: #
3762: # Returns:
3763: # 1 - indicating processing should continue.
3764: # Side effects
3765: # reply is written to $client.
3766: #
3767:
3768: sub put_domainroles_handler {
3769: my ($cmd,$tail,$client) = @_;
3770:
3771: my $userinput = "$cmd:$tail";
3772: my ($udom,$what)=split(/:/,$tail);
3773: chomp($what);
3774: my @pairs=split(/\&/,$what);
3775: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3776: if ($hashref) {
3777: foreach my $pair (@pairs) {
3778: my ($key,$value)=split(/=/,$pair);
3779: $hashref->{$key}=$value;
3780: }
1.311 albertel 3781: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3782: &Reply($client, "ok\n", $userinput);
3783: } else {
3784: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3785: "while attempting domroleput\n", $userinput);
3786: }
3787: } else {
3788: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3789: "while attempting domroleput\n", $userinput);
3790: }
3791:
3792: return 1;
3793: }
3794:
3795: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
3796:
3797: #
3798: # Retrieves domain roles from nohist_domainroles database
3799: # Returns to client an & separated list of key=value pairs,
3800: # where key is role and value is start and end date information.
3801: #
3802: # Parameters
3803: # $cmd - Command keyword that caused us to be dispatched.
3804: # $tail - Tail of the command. Consists of a colon separated:
3805: # domain - the domain whose domain roles table we dump
3806: # $client - Socket open on the client.
3807: #
3808: # Returns:
3809: # 1 - indicating processing should continue.
3810: # Side effects
3811: # reply (& separated list of role=start/end info pairs) is
3812: # written to $client.
3813: #
3814: sub dump_domainroles_handler {
3815: my ($cmd, $tail, $client) = @_;
3816:
3817: my $userinput = "$cmd:$tail";
3818: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
3819: chomp($rolesfilter);
3820: my @roles = ();
3821: if (defined($startfilter)) {
3822: $startfilter=&unescape($startfilter);
3823: } else {
3824: $startfilter='.';
3825: }
3826: if (defined($endfilter)) {
3827: $endfilter=&unescape($endfilter);
3828: } else {
3829: $endfilter='.';
3830: }
3831: if (defined($rolesfilter)) {
3832: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 3833: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 3834: }
3835:
3836: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3837: if ($hashref) {
3838: my $qresult = '';
3839: while (my ($key,$value) = each(%$hashref)) {
3840: my $match = 1;
3841: my ($start,$end) = split(/:/,&unescape($value));
3842: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
3843: unless ($startfilter eq '.' || !defined($startfilter)) {
3844: if ($start >= $startfilter) {
3845: $match = 0;
3846: }
3847: }
3848: unless ($endfilter eq '.' || !defined($endfilter)) {
3849: if ($end <= $endfilter) {
3850: $match = 0;
3851: }
3852: }
3853: unless (@roles < 1) {
3854: unless (grep/^$trole$/,@roles) {
3855: $match = 0;
3856: }
3857: }
3858: if ($match == 1) {
3859: $qresult.=$key.'='.$value.'&';
3860: }
3861: }
1.311 albertel 3862: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3863: chop($qresult);
3864: &Reply($client, "$qresult\n", $userinput);
3865: } else {
3866: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3867: "while attempting domrolesdump\n", $userinput);
3868: }
3869: } else {
3870: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3871: "while attempting domrolesdump\n", $userinput);
3872: }
3873: return 1;
3874: }
3875:
3876: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
3877:
3878:
1.238 foxr 3879: # Process the tmpput command I'm not sure what this does.. Seems to
3880: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3881: # where Id is the client's ip concatenated with a sequence number.
3882: # The file will contain some value that is passed in. Is this e.g.
3883: # a login token?
3884: #
3885: # Parameters:
3886: # $cmd - The command that got us dispatched.
3887: # $tail - The remainder of the request following $cmd:
3888: # In this case this will be the contents of the file.
3889: # $client - Socket connected to the client.
3890: # Returns:
3891: # 1 indicating processing can continue.
3892: # Side effects:
3893: # A file is created in the local filesystem.
3894: # A reply is sent to the client.
3895: sub tmp_put_handler {
3896: my ($cmd, $what, $client) = @_;
3897:
3898: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3899:
3900:
3901: my $store;
3902: $tmpsnum++;
3903: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3904: $id=~s/\W/\_/g;
3905: $what=~s/\n//g;
3906: my $execdir=$perlvar{'lonDaemons'};
3907: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3908: print $store $what;
3909: close $store;
3910: &Reply($client, "$id\n", $userinput);
3911: } else {
3912: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3913: "while attempting tmpput\n", $userinput);
3914: }
3915: return 1;
3916:
3917: }
3918: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 3919:
1.238 foxr 3920: # Processes the tmpget command. This command returns the contents
3921: # of a temporary resource file(?) created via tmpput.
3922: #
3923: # Paramters:
3924: # $cmd - Command that got us dispatched.
3925: # $id - Tail of the command, contain the id of the resource
3926: # we want to fetch.
3927: # $client - socket open on the client.
3928: # Return:
3929: # 1 - Inidcating processing can continue.
3930: # Side effects:
3931: # A reply is sent to the client.
3932: #
3933: sub tmp_get_handler {
3934: my ($cmd, $id, $client) = @_;
3935:
3936: my $userinput = "$cmd:$id";
3937:
3938:
3939: $id=~s/\W/\_/g;
3940: my $store;
3941: my $execdir=$perlvar{'lonDaemons'};
3942: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3943: my $reply=<$store>;
3944: &Reply( $client, "$reply\n", $userinput);
3945: close $store;
3946: } else {
3947: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3948: "while attempting tmpget\n", $userinput);
3949: }
3950:
3951: return 1;
3952: }
3953: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 3954:
1.238 foxr 3955: #
3956: # Process the tmpdel command. This command deletes a temp resource
3957: # created by the tmpput command.
3958: #
3959: # Parameters:
3960: # $cmd - Command that got us here.
3961: # $id - Id of the temporary resource created.
3962: # $client - socket open on the client process.
3963: #
3964: # Returns:
3965: # 1 - Indicating processing should continue.
3966: # Side Effects:
3967: # A file is deleted
3968: # A reply is sent to the client.
3969: sub tmp_del_handler {
3970: my ($cmd, $id, $client) = @_;
3971:
3972: my $userinput= "$cmd:$id";
3973:
3974: chomp($id);
3975: $id=~s/\W/\_/g;
3976: my $execdir=$perlvar{'lonDaemons'};
3977: if (unlink("$execdir/tmp/$id.tmp")) {
3978: &Reply($client, "ok\n", $userinput);
3979: } else {
3980: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3981: "while attempting tmpdel\n", $userinput);
3982: }
3983:
3984: return 1;
3985:
3986: }
3987: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 3988:
1.238 foxr 3989: #
1.246 foxr 3990: # Processes the setannounce command. This command
3991: # creates a file named announce.txt in the top directory of
3992: # the documentn root and sets its contents. The announce.txt file is
3993: # printed in its entirety at the LonCAPA login page. Note:
3994: # once the announcement.txt fileis created it cannot be deleted.
3995: # However, setting the contents of the file to empty removes the
3996: # announcement from the login page of loncapa so who cares.
3997: #
3998: # Parameters:
3999: # $cmd - The command that got us dispatched.
4000: # $announcement - The text of the announcement.
4001: # $client - Socket open on the client process.
4002: # Retunrns:
4003: # 1 - Indicating request processing should continue
4004: # Side Effects:
4005: # The file {DocRoot}/announcement.txt is created.
4006: # A reply is sent to $client.
4007: #
4008: sub set_announce_handler {
4009: my ($cmd, $announcement, $client) = @_;
4010:
4011: my $userinput = "$cmd:$announcement";
4012:
4013: chomp($announcement);
4014: $announcement=&unescape($announcement);
4015: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4016: '/announcement.txt')) {
4017: print $store $announcement;
4018: close $store;
4019: &Reply($client, "ok\n", $userinput);
4020: } else {
4021: &Failure($client, "error: ".($!+0)."\n", $userinput);
4022: }
4023:
4024: return 1;
4025: }
4026: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 4027:
1.246 foxr 4028: #
4029: # Return the version of the daemon. This can be used to determine
4030: # the compatibility of cross version installations or, alternatively to
4031: # simply know who's out of date and who isn't. Note that the version
4032: # is returned concatenated with the tail.
4033: # Parameters:
4034: # $cmd - the request that dispatched to us.
4035: # $tail - Tail of the request (client's version?).
4036: # $client - Socket open on the client.
4037: #Returns:
4038: # 1 - continue processing requests.
4039: # Side Effects:
4040: # Replies with version to $client.
4041: sub get_version_handler {
4042: my ($cmd, $tail, $client) = @_;
4043:
4044: my $userinput = $cmd.$tail;
4045:
4046: &Reply($client, &version($userinput)."\n", $userinput);
4047:
4048:
4049: return 1;
4050: }
4051: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 4052:
1.246 foxr 4053: # Set the current host and domain. This is used to support
4054: # multihomed systems. Each IP of the system, or even separate daemons
4055: # on the same IP can be treated as handling a separate lonCAPA virtual
4056: # machine. This command selects the virtual lonCAPA. The client always
4057: # knows the right one since it is lonc and it is selecting the domain/system
4058: # from the hosts.tab file.
4059: # Parameters:
4060: # $cmd - Command that dispatched us.
4061: # $tail - Tail of the command (domain/host requested).
4062: # $socket - Socket open on the client.
4063: #
4064: # Returns:
4065: # 1 - Indicates the program should continue to process requests.
4066: # Side-effects:
4067: # The default domain/system context is modified for this daemon.
4068: # a reply is sent to the client.
4069: #
4070: sub set_virtual_host_handler {
4071: my ($cmd, $tail, $socket) = @_;
4072:
4073: my $userinput ="$cmd:$tail";
4074:
4075: &Reply($client, &sethost($userinput)."\n", $userinput);
4076:
4077:
4078: return 1;
4079: }
1.247 albertel 4080: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 4081:
4082: # Process a request to exit:
4083: # - "bye" is sent to the client.
4084: # - The client socket is shutdown and closed.
4085: # - We indicate to the caller that we should exit.
4086: # Formal Parameters:
4087: # $cmd - The command that got us here.
4088: # $tail - Tail of the command (empty).
4089: # $client - Socket open on the tail.
4090: # Returns:
4091: # 0 - Indicating the program should exit!!
4092: #
4093: sub exit_handler {
4094: my ($cmd, $tail, $client) = @_;
4095:
4096: my $userinput = "$cmd:$tail";
4097:
4098: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4099: &Reply($client, "bye\n", $userinput);
4100: $client->shutdown(2); # shutdown the socket forcibly.
4101: $client->close();
4102:
4103: return 0;
4104: }
1.248 foxr 4105: ®ister_handler("exit", \&exit_handler, 0,1,1);
4106: ®ister_handler("init", \&exit_handler, 0,1,1);
4107: ®ister_handler("quit", \&exit_handler, 0,1,1);
4108:
4109: # Determine if auto-enrollment is enabled.
4110: # Note that the original had what I believe to be a defect.
4111: # The original returned 0 if the requestor was not a registerd client.
4112: # It should return "refused".
4113: # Formal Parameters:
4114: # $cmd - The command that invoked us.
4115: # $tail - The tail of the command (Extra command parameters.
4116: # $client - The socket open on the client that issued the request.
4117: # Returns:
4118: # 1 - Indicating processing should continue.
4119: #
4120: sub enrollment_enabled_handler {
4121: my ($cmd, $tail, $client) = @_;
4122: my $userinput = $cmd.":".$tail; # For logging purposes.
4123:
4124:
4125: my $cdom = split(/:/, $tail); # Domain we're asking about.
4126: my $outcome = &localenroll::run($cdom);
4127: &Reply($client, "$outcome\n", $userinput);
4128:
4129: return 1;
4130: }
4131: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4132:
4133: # Get the official sections for which auto-enrollment is possible.
4134: # Since the admin people won't know about 'unofficial sections'
4135: # we cannot auto-enroll on them.
4136: # Formal Parameters:
4137: # $cmd - The command request that got us dispatched here.
4138: # $tail - The remainder of the request. In our case this
4139: # will be split into:
4140: # $coursecode - The course name from the admin point of view.
4141: # $cdom - The course's domain(?).
4142: # $client - Socket open on the client.
4143: # Returns:
4144: # 1 - Indiciting processing should continue.
4145: #
4146: sub get_sections_handler {
4147: my ($cmd, $tail, $client) = @_;
4148: my $userinput = "$cmd:$tail";
4149:
4150: my ($coursecode, $cdom) = split(/:/, $tail);
4151: my @secs = &localenroll::get_sections($coursecode,$cdom);
4152: my $seclist = &escape(join(':',@secs));
4153:
4154: &Reply($client, "$seclist\n", $userinput);
4155:
4156:
4157: return 1;
4158: }
4159: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4160:
4161: # Validate the owner of a new course section.
4162: #
4163: # Formal Parameters:
4164: # $cmd - Command that got us dispatched.
4165: # $tail - the remainder of the command. For us this consists of a
4166: # colon separated string containing:
4167: # $inst - Course Id from the institutions point of view.
4168: # $owner - Proposed owner of the course.
4169: # $cdom - Domain of the course (from the institutions
4170: # point of view?)..
4171: # $client - Socket open on the client.
4172: #
4173: # Returns:
4174: # 1 - Processing should continue.
4175: #
4176: sub validate_course_owner_handler {
4177: my ($cmd, $tail, $client) = @_;
4178: my $userinput = "$cmd:$tail";
4179: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4180:
4181: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4182: &Reply($client, "$outcome\n", $userinput);
4183:
4184:
4185:
4186: return 1;
4187: }
4188: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 4189:
1.248 foxr 4190: #
4191: # Validate a course section in the official schedule of classes
4192: # from the institutions point of view (part of autoenrollment).
4193: #
4194: # Formal Parameters:
4195: # $cmd - The command request that got us dispatched.
4196: # $tail - The tail of the command. In this case,
4197: # this is a colon separated set of words that will be split
4198: # into:
4199: # $inst_course_id - The course/section id from the
4200: # institutions point of view.
4201: # $cdom - The domain from the institutions
4202: # point of view.
4203: # $client - Socket open on the client.
4204: # Returns:
4205: # 1 - Indicating processing should continue.
4206: #
4207: sub validate_course_section_handler {
4208: my ($cmd, $tail, $client) = @_;
4209: my $userinput = "$cmd:$tail";
4210: my ($inst_course_id, $cdom) = split(/:/, $tail);
4211:
4212: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4213: &Reply($client, "$outcome\n", $userinput);
4214:
4215:
4216: return 1;
4217: }
4218: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4219:
4220: #
4221: # Create a password for a new auto-enrollment user.
4222: # I think/guess, this password allows access to the institutions
4223: # AIS class list server/services. Stuart can correct this comment
4224: # when he finds out how wrong I am.
4225: #
4226: # Formal Parameters:
4227: # $cmd - The command request that got us dispatched.
4228: # $tail - The tail of the command. In this case this is a colon separated
4229: # set of words that will be split into:
4230: # $authparam - An authentication parameter (username??).
4231: # $cdom - The domain of the course from the institution's
4232: # point of view.
4233: # $client - The socket open on the client.
4234: # Returns:
4235: # 1 - continue processing.
4236: #
4237: sub create_auto_enroll_password_handler {
4238: my ($cmd, $tail, $client) = @_;
4239: my $userinput = "$cmd:$tail";
4240:
4241: my ($authparam, $cdom) = split(/:/, $userinput);
4242:
4243: my ($create_passwd,$authchk);
4244: ($authparam,
4245: $create_passwd,
4246: $authchk) = &localenroll::create_password($authparam,$cdom);
4247:
4248: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4249: $userinput);
4250:
4251:
4252: return 1;
4253: }
4254: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4255: 0, 1, 0);
4256:
4257: # Retrieve and remove temporary files created by/during autoenrollment.
4258: #
4259: # Formal Parameters:
4260: # $cmd - The command that got us dispatched.
4261: # $tail - The tail of the command. In our case this is a colon
4262: # separated list that will be split into:
4263: # $filename - The name of the file to remove.
4264: # The filename is given as a path relative to
4265: # the LonCAPA temp file directory.
4266: # $client - Socket open on the client.
4267: #
4268: # Returns:
4269: # 1 - Continue processing.
4270: sub retrieve_auto_file_handler {
4271: my ($cmd, $tail, $client) = @_;
4272: my $userinput = "cmd:$tail";
4273:
4274: my ($filename) = split(/:/, $tail);
4275:
4276: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4277: if ( (-e $source) && ($filename ne '') ) {
4278: my $reply = '';
4279: if (open(my $fh,$source)) {
4280: while (<$fh>) {
4281: chomp($_);
4282: $_ =~ s/^\s+//g;
4283: $_ =~ s/\s+$//g;
4284: $reply .= $_;
4285: }
4286: close($fh);
4287: &Reply($client, &escape($reply)."\n", $userinput);
4288:
4289: # Does this have to be uncommented??!? (RF).
4290: #
4291: # unlink($source);
4292: } else {
4293: &Failure($client, "error\n", $userinput);
4294: }
4295: } else {
4296: &Failure($client, "error\n", $userinput);
4297: }
4298:
4299:
4300: return 1;
4301: }
4302: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4303:
4304: #
4305: # Read and retrieve institutional code format (for support form).
4306: # Formal Parameters:
4307: # $cmd - Command that dispatched us.
4308: # $tail - Tail of the command. In this case it conatins
4309: # the course domain and the coursename.
4310: # $client - Socket open on the client.
4311: # Returns:
4312: # 1 - Continue processing.
4313: #
4314: sub get_institutional_code_format_handler {
4315: my ($cmd, $tail, $client) = @_;
4316: my $userinput = "$cmd:$tail";
4317:
4318: my $reply;
4319: my($cdom,$course) = split(/:/,$tail);
4320: my @pairs = split/\&/,$course;
4321: my %instcodes = ();
4322: my %codes = ();
4323: my @codetitles = ();
4324: my %cat_titles = ();
4325: my %cat_order = ();
4326: foreach (@pairs) {
4327: my ($key,$value) = split/=/,$_;
4328: $instcodes{&unescape($key)} = &unescape($value);
4329: }
4330: my $formatreply = &localenroll::instcode_format($cdom,
4331: \%instcodes,
4332: \%codes,
4333: \@codetitles,
4334: \%cat_titles,
4335: \%cat_order);
4336: if ($formatreply eq 'ok') {
4337: my $codes_str = &hash2str(%codes);
4338: my $codetitles_str = &array2str(@codetitles);
4339: my $cat_titles_str = &hash2str(%cat_titles);
4340: my $cat_order_str = &hash2str(%cat_order);
4341: &Reply($client,
4342: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4343: .$cat_order_str."\n",
4344: $userinput);
4345: } else {
4346: # this else branch added by RF since if not ok, lonc will
4347: # hang waiting on reply until timeout.
4348: #
4349: &Reply($client, "format_error\n", $userinput);
4350: }
4351:
4352: return 1;
4353: }
1.265 albertel 4354: ®ister_handler("autoinstcodeformat",
4355: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 4356:
1.317 raeburn 4357: # Get domain specific conditions for import of student photographs to a course
4358: #
4359: # Retrieves information from photo_permission subroutine in localenroll.
4360: # Returns outcome (ok) if no processing errors, and whether course owner is
4361: # required to accept conditions of use (yes/no).
4362: #
4363: #
4364: sub photo_permission_handler {
4365: my ($cmd, $tail, $client) = @_;
4366: my $userinput = "$cmd:$tail";
4367: my $cdom = $tail;
4368: my ($perm_reqd,$conditions);
4369: my $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
1.318 albertel 4370: \$conditions);
1.317 raeburn 4371: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
1.318 albertel 4372: $userinput);
1.317 raeburn 4373: }
4374: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
4375:
4376: #
4377: # Checks if student photo is available for a user in the domain, in the user's
4378: # directory (in /userfiles/internal/studentphoto.jpg).
4379: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
4380: # the student's photo.
4381:
4382: sub photo_check_handler {
4383: my ($cmd, $tail, $client) = @_;
4384: my $userinput = "$cmd:$tail";
4385: my ($udom,$uname,$pid) = split(/:/,$tail);
4386: $udom = &unescape($udom);
4387: $uname = &unescape($uname);
4388: $pid = &unescape($pid);
4389: my $path=&propath($udom,$uname).'/userfiles/internal/';
4390: if (!-e $path) {
4391: &mkpath($path);
4392: }
4393: my $response;
4394: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
4395: $result .= ':'.$response;
4396: &Reply($client, &escape($result)."\n",$userinput);
4397: }
4398: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
4399:
4400: #
4401: # Retrieve information from localenroll about whether to provide a button
4402: # for users who have enbled import of student photos to initiate an
4403: # update of photo files for registered students. Also include
4404: # comment to display alongside button.
4405:
4406: sub photo_choice_handler {
4407: my ($cmd, $tail, $client) = @_;
4408: my $userinput = "$cmd:$tail";
4409: my $cdom = &unescape($tail);
4410: my ($update,$comment) = &localenroll::manager_photo_update($cdom);
4411: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
4412: }
4413: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
4414:
1.265 albertel 4415: #
4416: # Gets a student's photo to exist (in the correct image type) in the user's
4417: # directory.
4418: # Formal Parameters:
4419: # $cmd - The command request that got us dispatched.
4420: # $tail - A colon separated set of words that will be split into:
4421: # $domain - student's domain
4422: # $uname - student username
4423: # $type - image type desired
4424: # $client - The socket open on the client.
4425: # Returns:
4426: # 1 - continue processing.
1.317 raeburn 4427:
1.265 albertel 4428: sub student_photo_handler {
4429: my ($cmd, $tail, $client) = @_;
1.317 raeburn 4430: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265 albertel 4431:
1.317 raeburn 4432: my $path=&propath($domain,$uname). '/userfiles/internal/';
4433: my $filename = 'studentphoto.'.$ext;
4434: if ($type eq 'thumbnail') {
4435: $filename = 'studentphoto_tn.'.$ext;
4436: }
4437: if (-e $path.$filename) {
1.265 albertel 4438: &Reply($client,"ok\n","$cmd:$tail");
4439: return 1;
4440: }
4441: &mkpath($path);
1.317 raeburn 4442: my $file;
4443: if ($type eq 'thumbnail') {
4444: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
4445: } else {
4446: $file=&localstudentphoto::fetch($domain,$uname);
4447: }
1.265 albertel 4448: if (!$file) {
4449: &Failure($client,"unavailable\n","$cmd:$tail");
4450: return 1;
4451: }
1.317 raeburn 4452: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
4453: if (-e $path.$filename) {
1.265 albertel 4454: &Reply($client,"ok\n","$cmd:$tail");
4455: return 1;
4456: }
4457: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4458: return 1;
4459: }
4460: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 4461:
1.264 albertel 4462: # mkpath makes all directories for a file, expects an absolute path with a
4463: # file or a trailing / if just a dir is passed
4464: # returns 1 on success 0 on failure
4465: sub mkpath {
4466: my ($file)=@_;
4467: my @parts=split(/\//,$file,-1);
4468: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4469: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 4470: $now.='/'.$parts[$i];
1.264 albertel 4471: if (!-e $now) {
4472: if (!mkdir($now,0770)) { return 0; }
4473: }
4474: }
4475: return 1;
4476: }
4477:
1.207 foxr 4478: #---------------------------------------------------------------
4479: #
4480: # Getting, decoding and dispatching requests:
4481: #
4482: #
4483: # Get a Request:
4484: # Gets a Request message from the client. The transaction
4485: # is defined as a 'line' of text. We remove the new line
4486: # from the text line.
1.226 foxr 4487: #
1.211 albertel 4488: sub get_request {
1.207 foxr 4489: my $input = <$client>;
4490: chomp($input);
1.226 foxr 4491:
1.234 foxr 4492: &Debug("get_request: Request = $input\n");
1.207 foxr 4493:
4494: &status('Processing '.$clientname.':'.$input);
4495:
4496: return $input;
4497: }
1.212 foxr 4498: #---------------------------------------------------------------
4499: #
4500: # Process a request. This sub should shrink as each action
4501: # gets farmed out into a separat sub that is registered
4502: # with the dispatch hash.
4503: #
4504: # Parameters:
4505: # user_input - The request received from the client (lonc).
4506: # Returns:
4507: # true to keep processing, false if caller should exit.
4508: #
4509: sub process_request {
4510: my ($userinput) = @_; # Easier for now to break style than to
4511: # fix all the userinput -> user_input.
4512: my $wasenc = 0; # True if request was encrypted.
4513: # ------------------------------------------------------------ See if encrypted
4514: if ($userinput =~ /^enc/) {
4515: $userinput = decipher($userinput);
4516: $wasenc=1;
4517: if(!$userinput) { # Cipher not defined.
1.251 foxr 4518: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 4519: return 0;
4520: }
4521: }
4522: Debug("process_request: $userinput\n");
4523:
1.213 foxr 4524: #
4525: # The 'correct way' to add a command to lond is now to
4526: # write a sub to execute it and Add it to the command dispatch
4527: # hash via a call to register_handler.. The comments to that
4528: # sub should give you enough to go on to show how to do this
4529: # along with the examples that are building up as this code
4530: # is getting refactored. Until all branches of the
4531: # if/elseif monster below have been factored out into
4532: # separate procesor subs, if the dispatch hash is missing
4533: # the command keyword, we will fall through to the remainder
4534: # of the if/else chain below in order to keep this thing in
4535: # working order throughout the transmogrification.
4536:
4537: my ($command, $tail) = split(/:/, $userinput, 2);
4538: chomp($command);
4539: chomp($tail);
4540: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 4541: $command =~ s/(\r)//; # And this too for parameterless commands.
4542: if(!$tail) {
4543: $tail =""; # defined but blank.
4544: }
1.213 foxr 4545:
4546: &Debug("Command received: $command, encoded = $wasenc");
4547:
4548: if(defined $Dispatcher{$command}) {
4549:
4550: my $dispatch_info = $Dispatcher{$command};
4551: my $handler = $$dispatch_info[0];
4552: my $need_encode = $$dispatch_info[1];
4553: my $client_types = $$dispatch_info[2];
4554: Debug("Matched dispatch hash: mustencode: $need_encode "
4555: ."ClientType $client_types");
4556:
4557: # Validate the request:
4558:
4559: my $ok = 1;
4560: my $requesterprivs = 0;
4561: if(&isClient()) {
4562: $requesterprivs |= $CLIENT_OK;
4563: }
4564: if(&isManager()) {
4565: $requesterprivs |= $MANAGER_OK;
4566: }
4567: if($need_encode && (!$wasenc)) {
4568: Debug("Must encode but wasn't: $need_encode $wasenc");
4569: $ok = 0;
4570: }
4571: if(($client_types & $requesterprivs) == 0) {
4572: Debug("Client not privileged to do this operation");
4573: $ok = 0;
4574: }
4575:
4576: if($ok) {
4577: Debug("Dispatching to handler $command $tail");
4578: my $keep_going = &$handler($command, $tail, $client);
4579: return $keep_going;
4580: } else {
4581: Debug("Refusing to dispatch because client did not match requirements");
4582: Failure($client, "refused\n", $userinput);
4583: return 1;
4584: }
4585:
4586: }
4587:
1.262 foxr 4588: print $client "unknown_cmd\n";
1.212 foxr 4589: # -------------------------------------------------------------------- complete
4590: Debug("process_request - returning 1");
4591: return 1;
4592: }
1.207 foxr 4593: #
4594: # Decipher encoded traffic
4595: # Parameters:
4596: # input - Encoded data.
4597: # Returns:
4598: # Decoded data or undef if encryption key was not yet negotiated.
4599: # Implicit input:
4600: # cipher - This global holds the negotiated encryption key.
4601: #
1.211 albertel 4602: sub decipher {
1.207 foxr 4603: my ($input) = @_;
4604: my $output = '';
1.212 foxr 4605:
4606:
1.207 foxr 4607: if($cipher) {
4608: my($enc, $enclength, $encinput) = split(/:/, $input);
4609: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4610: $output .=
4611: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4612: }
4613: return substr($output, 0, $enclength);
4614: } else {
4615: return undef;
4616: }
4617: }
4618:
4619: #
4620: # Register a command processor. This function is invoked to register a sub
4621: # to process a request. Once registered, the ProcessRequest sub can automatically
4622: # dispatch requests to an appropriate sub, and do the top level validity checking
4623: # as well:
4624: # - Is the keyword recognized.
4625: # - Is the proper client type attempting the request.
4626: # - Is the request encrypted if it has to be.
4627: # Parameters:
4628: # $request_name - Name of the request being registered.
4629: # This is the command request that will match
4630: # against the hash keywords to lookup the information
4631: # associated with the dispatch information.
4632: # $procedure - Reference to a sub to call to process the request.
4633: # All subs get called as follows:
4634: # Procedure($cmd, $tail, $replyfd, $key)
4635: # $cmd - the actual keyword that invoked us.
4636: # $tail - the tail of the request that invoked us.
4637: # $replyfd- File descriptor connected to the client
4638: # $must_encode - True if the request must be encoded to be good.
4639: # $client_ok - True if it's ok for a client to request this.
4640: # $manager_ok - True if it's ok for a manager to request this.
4641: # Side effects:
4642: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4643: # - On failure, the program will die as it's a bad internal bug to try to
4644: # register a duplicate command handler.
4645: #
1.211 albertel 4646: sub register_handler {
1.212 foxr 4647: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4648:
4649: # Don't allow duplication#
4650:
4651: if (defined $Dispatcher{$request_name}) {
4652: die "Attempting to define a duplicate request handler for $request_name\n";
4653: }
4654: # Build the client type mask:
4655:
4656: my $client_type_mask = 0;
4657: if($client_ok) {
4658: $client_type_mask |= $CLIENT_OK;
4659: }
4660: if($manager_ok) {
4661: $client_type_mask |= $MANAGER_OK;
4662: }
4663:
4664: # Enter the hash:
4665:
4666: my @entry = ($procedure, $must_encode, $client_type_mask);
4667:
4668: $Dispatcher{$request_name} = \@entry;
4669:
4670: }
4671:
4672:
4673: #------------------------------------------------------------------
4674:
4675:
4676:
4677:
1.141 foxr 4678: #
1.96 foxr 4679: # Convert an error return code from lcpasswd to a string value.
4680: #
4681: sub lcpasswdstrerror {
4682: my $ErrorCode = shift;
1.97 foxr 4683: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4684: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4685: } else {
1.98 foxr 4686: return $passwderrors[$ErrorCode];
1.96 foxr 4687: }
4688: }
4689:
1.97 foxr 4690: #
4691: # Convert an error return code from lcuseradd to a string value:
4692: #
4693: sub lcuseraddstrerror {
4694: my $ErrorCode = shift;
4695: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4696: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4697: } else {
1.98 foxr 4698: return $adderrors[$ErrorCode];
1.97 foxr 4699: }
4700: }
4701:
1.23 harris41 4702: # grabs exception and records it to log before exiting
4703: sub catchexception {
1.27 albertel 4704: my ($error)=@_;
1.25 www 4705: $SIG{'QUIT'}='DEFAULT';
4706: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4707: &status("Catching exception");
1.190 albertel 4708: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4709: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4710: ."a crash with this error msg->[$error]</font>");
1.57 www 4711: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4712: if ($client) { print $client "error: $error\n"; }
1.59 www 4713: $server->close();
1.27 albertel 4714: die($error);
1.23 harris41 4715: }
1.63 www 4716: sub timeout {
1.165 albertel 4717: &status("Handling Timeout");
1.190 albertel 4718: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4719: &catchexception('Timeout');
4720: }
1.22 harris41 4721: # -------------------------------- Set signal handlers to record abnormal exits
4722:
1.226 foxr 4723:
1.22 harris41 4724: $SIG{'QUIT'}=\&catchexception;
4725: $SIG{__DIE__}=\&catchexception;
4726:
1.81 matthew 4727: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4728: &status("Read loncapa.conf and loncapa_apache.conf");
4729: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4730: %perlvar=%{$perlvarref};
1.80 harris41 4731: undef $perlvarref;
1.19 www 4732:
1.35 harris41 4733: # ----------------------------- Make sure this process is running from user=www
4734: my $wwwid=getpwnam('www');
4735: if ($wwwid!=$<) {
1.134 albertel 4736: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4737: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4738: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4739: mailto $emailto -s '$subj' > /dev/null");
4740: exit 1;
4741: }
4742:
1.19 www 4743: # --------------------------------------------- Check if other instance running
4744:
4745: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4746:
4747: if (-e $pidfile) {
4748: my $lfh=IO::File->new("$pidfile");
4749: my $pide=<$lfh>;
4750: chomp($pide);
1.29 harris41 4751: if (kill 0 => $pide) { die "already running"; }
1.19 www 4752: }
1.1 albertel 4753:
4754: # ------------------------------------------------------------- Read hosts file
4755:
4756:
4757:
4758: # establish SERVER socket, bind and listen.
4759: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4760: Type => SOCK_STREAM,
4761: Proto => 'tcp',
4762: Reuse => 1,
4763: Listen => 10 )
1.29 harris41 4764: or die "making socket: $@\n";
1.1 albertel 4765:
4766: # --------------------------------------------------------- Do global variables
4767:
4768: # global variables
4769:
1.134 albertel 4770: my %children = (); # keys are current child process IDs
1.1 albertel 4771:
4772: sub REAPER { # takes care of dead children
4773: $SIG{CHLD} = \&REAPER;
1.165 albertel 4774: &status("Handling child death");
1.178 foxr 4775: my $pid;
4776: do {
4777: $pid = waitpid(-1,&WNOHANG());
4778: if (defined($children{$pid})) {
4779: &logthis("Child $pid died");
4780: delete($children{$pid});
1.183 albertel 4781: } elsif ($pid > 0) {
1.178 foxr 4782: &logthis("Unknown Child $pid died");
4783: }
4784: } while ( $pid > 0 );
4785: foreach my $child (keys(%children)) {
4786: $pid = waitpid($child,&WNOHANG());
4787: if ($pid > 0) {
4788: &logthis("Child $child - $pid looks like we missed it's death");
4789: delete($children{$pid});
4790: }
1.176 albertel 4791: }
1.165 albertel 4792: &status("Finished Handling child death");
1.1 albertel 4793: }
4794:
4795: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4796: &status("Killing children (INT)");
1.1 albertel 4797: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4798: kill 'INT' => keys %children;
1.59 www 4799: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4800: my $execdir=$perlvar{'lonDaemons'};
4801: unlink("$execdir/logs/lond.pid");
1.190 albertel 4802: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4803: &status("Done killing children");
1.1 albertel 4804: exit; # clean up with dignity
4805: }
4806:
4807: sub HUPSMAN { # signal handler for SIGHUP
4808: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4809: &status("Killing children for restart (HUP)");
1.1 albertel 4810: kill 'INT' => keys %children;
1.59 www 4811: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4812: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4813: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4814: unlink("$execdir/logs/lond.pid");
1.165 albertel 4815: &status("Restarting self (HUP)");
1.1 albertel 4816: exec("$execdir/lond"); # here we go again
4817: }
4818:
1.144 foxr 4819: #
1.148 foxr 4820: # Kill off hashes that describe the host table prior to re-reading it.
4821: # Hashes affected are:
1.200 matthew 4822: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4823: #
4824: sub KillHostHashes {
4825: foreach my $key (keys %hostid) {
4826: delete $hostid{$key};
4827: }
4828: foreach my $key (keys %hostdom) {
4829: delete $hostdom{$key};
4830: }
4831: foreach my $key (keys %hostip) {
4832: delete $hostip{$key};
4833: }
1.200 matthew 4834: foreach my $key (keys %hostdns) {
4835: delete $hostdns{$key};
4836: }
1.148 foxr 4837: }
4838: #
4839: # Read in the host table from file and distribute it into the various hashes:
4840: #
4841: # - %hostid - Indexed by IP, the loncapa hostname.
4842: # - %hostdom - Indexed by loncapa hostname, the domain.
4843: # - %hostip - Indexed by hostid, the Ip address of the host.
4844: sub ReadHostTable {
4845:
4846: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4847: my $myloncapaname = $perlvar{'lonHostID'};
4848: Debug("My loncapa name is : $myloncapaname");
1.296 albertel 4849: my %name_to_ip;
1.148 foxr 4850: while (my $configline=<CONFIG>) {
1.277 albertel 4851: if ($configline !~ /^\s*\#/ && $configline !~ /^\s*$/ ) {
4852: my ($id,$domain,$role,$name)=split(/:/,$configline);
4853: $name=~s/\s//g;
1.296 albertel 4854: my $ip;
4855: if (!exists($name_to_ip{$name})) {
4856: $ip = gethostbyname($name);
4857: if (!$ip || length($ip) ne 4) {
4858: &logthis("Skipping host $id name $name no IP found\n");
4859: next;
4860: }
4861: $ip=inet_ntoa($ip);
4862: $name_to_ip{$name} = $ip;
4863: } else {
4864: $ip = $name_to_ip{$name};
1.277 albertel 4865: }
1.200 matthew 4866: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4867: $hostdom{$id}=$domain; # LonCAPA domain name of host.
1.307 albertel 4868: $hostname{$id}=$name; # LonCAPA name -> DNS name
1.277 albertel 4869: $hostip{$id}=$ip; # IP address of host.
1.200 matthew 4870: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4871:
4872: if ($id eq $perlvar{'lonHostID'}) {
4873: Debug("Found me in the host table: $name");
4874: $thisserver=$name;
4875: }
1.178 foxr 4876: }
1.148 foxr 4877: }
4878: close(CONFIG);
4879: }
4880: #
4881: # Reload the Apache daemon's state.
1.150 foxr 4882: # This is done by invoking /home/httpd/perl/apachereload
4883: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4884: #
4885: sub ReloadApache {
1.150 foxr 4886: my $execdir = $perlvar{'lonDaemons'};
4887: my $script = $execdir."/apachereload";
4888: system($script);
1.148 foxr 4889: }
4890:
4891: #
1.144 foxr 4892: # Called in response to a USR2 signal.
4893: # - Reread hosts.tab
4894: # - All children connected to hosts that were removed from hosts.tab
4895: # are killed via SIGINT
4896: # - All children connected to previously existing hosts are sent SIGUSR1
4897: # - Our internal hosts hash is updated to reflect the new contents of
4898: # hosts.tab causing connections from hosts added to hosts.tab to
4899: # now be honored.
4900: #
4901: sub UpdateHosts {
1.165 albertel 4902: &status("Reload hosts.tab");
1.147 foxr 4903: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4904: #
4905: # The %children hash has the set of IP's we currently have children
4906: # on. These need to be matched against records in the hosts.tab
4907: # Any ip's no longer in the table get killed off they correspond to
4908: # either dropped or changed hosts. Note that the re-read of the table
4909: # will take care of new and changed hosts as connections come into being.
4910:
4911:
4912: KillHostHashes;
4913: ReadHostTable;
4914:
4915: foreach my $child (keys %children) {
4916: my $childip = $children{$child};
4917: if(!$hostid{$childip}) {
1.149 foxr 4918: logthis('<font color="blue"> UpdateHosts killing child '
4919: ." $child for ip $childip </font>");
1.148 foxr 4920: kill('INT', $child);
1.149 foxr 4921: } else {
4922: logthis('<font color="green"> keeping child for ip '
4923: ." $childip (pid=$child) </font>");
1.148 foxr 4924: }
4925: }
4926: ReloadApache;
1.165 albertel 4927: &status("Finished reloading hosts.tab");
1.144 foxr 4928: }
4929:
1.148 foxr 4930:
1.57 www 4931: sub checkchildren {
1.165 albertel 4932: &status("Checking on the children (sending signals)");
1.57 www 4933: &initnewstatus();
4934: &logstatus();
4935: &logthis('Going to check on the children');
1.134 albertel 4936: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4937: foreach (sort keys %children) {
1.221 albertel 4938: #sleep 1;
1.57 www 4939: unless (kill 'USR1' => $_) {
4940: &logthis ('Child '.$_.' is dead');
4941: &logstatus($$.' is dead');
1.221 albertel 4942: delete($children{$_});
1.57 www 4943: }
1.61 harris41 4944: }
1.63 www 4945: sleep 5;
1.212 foxr 4946: $SIG{ALRM} = sub { Debug("timeout");
4947: die "timeout"; };
1.113 albertel 4948: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4949: &status("Checking on the children (waiting for reports)");
1.63 www 4950: foreach (sort keys %children) {
4951: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4952: eval {
4953: alarm(300);
1.63 www 4954: &logthis('Child '.$_.' did not respond');
1.67 albertel 4955: kill 9 => $_;
1.131 albertel 4956: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4957: #$subj="LON: $currenthostid killed lond process $_";
4958: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4959: #$execdir=$perlvar{'lonDaemons'};
4960: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4961: delete($children{$_});
1.113 albertel 4962: alarm(0);
4963: }
1.63 www 4964: }
4965: }
1.113 albertel 4966: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4967: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4968: &status("Finished checking children");
1.221 albertel 4969: &logthis('Finished Checking children');
1.57 www 4970: }
4971:
1.1 albertel 4972: # --------------------------------------------------------------------- Logging
4973:
4974: sub logthis {
4975: my $message=shift;
4976: my $execdir=$perlvar{'lonDaemons'};
4977: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4978: my $now=time;
4979: my $local=localtime($now);
1.58 www 4980: $lastlog=$local.': '.$message;
1.1 albertel 4981: print $fh "$local ($$): $message\n";
4982: }
4983:
1.77 foxr 4984: # ------------------------- Conditional log if $DEBUG true.
4985: sub Debug {
4986: my $message = shift;
4987: if($DEBUG) {
4988: &logthis($message);
4989: }
4990: }
1.161 foxr 4991:
4992: #
4993: # Sub to do replies to client.. this gives a hook for some
4994: # debug tracing too:
4995: # Parameters:
4996: # fd - File open on client.
4997: # reply - Text to send to client.
4998: # request - Original request from client.
4999: #
5000: sub Reply {
1.192 foxr 5001: my ($fd, $reply, $request) = @_;
1.161 foxr 5002: print $fd $reply;
5003: Debug("Request was $request Reply was $reply");
5004:
1.212 foxr 5005: $Transactions++;
5006: }
5007:
5008:
5009: #
5010: # Sub to report a failure.
5011: # This function:
5012: # - Increments the failure statistic counters.
5013: # - Invokes Reply to send the error message to the client.
5014: # Parameters:
5015: # fd - File descriptor open on the client
5016: # reply - Reply text to emit.
5017: # request - The original request message (used by Reply
5018: # to debug if that's enabled.
5019: # Implicit outputs:
5020: # $Failures- The number of failures is incremented.
5021: # Reply (invoked here) sends a message to the
5022: # client:
5023: #
5024: sub Failure {
5025: my $fd = shift;
5026: my $reply = shift;
5027: my $request = shift;
5028:
5029: $Failures++;
5030: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 5031: }
1.57 www 5032: # ------------------------------------------------------------------ Log status
5033:
5034: sub logstatus {
1.178 foxr 5035: &status("Doing logging");
5036: my $docdir=$perlvar{'lonDocRoot'};
5037: {
5038: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 5039: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 5040: $fh->close();
5041: }
1.221 albertel 5042: &status("Finished $$.txt");
5043: {
5044: open(LOG,">>$docdir/lon-status/londstatus.txt");
5045: flock(LOG,LOCK_EX);
5046: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
5047: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 5048: flock(LOG,LOCK_UN);
1.221 albertel 5049: close(LOG);
5050: }
1.178 foxr 5051: &status("Finished logging");
1.57 www 5052: }
5053:
5054: sub initnewstatus {
5055: my $docdir=$perlvar{'lonDocRoot'};
5056: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
5057: my $now=time;
5058: my $local=localtime($now);
5059: print $fh "LOND status $local - parent $$\n\n";
1.64 www 5060: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 5061: while (my $filename=readdir(DIR)) {
1.64 www 5062: unlink("$docdir/lon-status/londchld/$filename");
5063: }
5064: closedir(DIR);
1.57 www 5065: }
5066:
5067: # -------------------------------------------------------------- Status setting
5068:
5069: sub status {
5070: my $what=shift;
5071: my $now=time;
5072: my $local=localtime($now);
1.178 foxr 5073: $status=$local.': '.$what;
5074: $0='lond: '.$what.' '.$local;
1.57 www 5075: }
1.11 www 5076:
5077: # -------------------------------------------------------- Escape Special Chars
5078:
5079: sub escape {
5080: my $str=shift;
5081: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5082: return $str;
5083: }
5084:
5085: # ----------------------------------------------------- Un-Escape Special Chars
5086:
5087: sub unescape {
5088: my $str=shift;
5089: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5090: return $str;
5091: }
5092:
1.1 albertel 5093: # ----------------------------------------------------------- Send USR1 to lonc
5094:
5095: sub reconlonc {
5096: my $peerfile=shift;
5097: &logthis("Trying to reconnect for $peerfile");
5098: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
5099: if (my $fh=IO::File->new("$loncfile")) {
5100: my $loncpid=<$fh>;
5101: chomp($loncpid);
5102: if (kill 0 => $loncpid) {
5103: &logthis("lonc at pid $loncpid responding, sending USR1");
5104: kill USR1 => $loncpid;
5105: } else {
1.9 www 5106: &logthis(
1.190 albertel 5107: "<font color='red'>CRITICAL: "
1.9 www 5108: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 5109: }
5110: } else {
1.190 albertel 5111: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 5112: }
5113: }
5114:
5115: # -------------------------------------------------- Non-critical communication
1.11 www 5116:
1.1 albertel 5117: sub subreply {
5118: my ($cmd,$server)=@_;
1.307 albertel 5119: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
1.1 albertel 5120: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5121: Type => SOCK_STREAM,
5122: Timeout => 10)
5123: or return "con_lost";
1.307 albertel 5124: print $sclient "sethost:$server:$cmd\n";
1.1 albertel 5125: my $answer=<$sclient>;
5126: chomp($answer);
5127: if (!$answer) { $answer="con_lost"; }
5128: return $answer;
5129: }
5130:
5131: sub reply {
5132: my ($cmd,$server)=@_;
5133: my $answer;
1.115 albertel 5134: if ($server ne $currenthostid) {
1.1 albertel 5135: $answer=subreply($cmd,$server);
5136: if ($answer eq 'con_lost') {
5137: $answer=subreply("ping",$server);
5138: if ($answer ne $server) {
1.115 albertel 5139: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.307 albertel 5140: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$server});
1.1 albertel 5141: }
5142: $answer=subreply($cmd,$server);
5143: }
5144: } else {
5145: $answer='self_reply';
5146: }
5147: return $answer;
5148: }
5149:
1.13 www 5150: # -------------------------------------------------------------- Talk to lonsql
5151:
1.234 foxr 5152: sub sql_reply {
1.12 harris41 5153: my ($cmd)=@_;
1.234 foxr 5154: my $answer=&sub_sql_reply($cmd);
5155: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 5156: return $answer;
5157: }
5158:
1.234 foxr 5159: sub sub_sql_reply {
1.12 harris41 5160: my ($cmd)=@_;
5161: my $unixsock="mysqlsock";
5162: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5163: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5164: Type => SOCK_STREAM,
5165: Timeout => 10)
5166: or return "con_lost";
5167: print $sclient "$cmd\n";
5168: my $answer=<$sclient>;
5169: chomp($answer);
5170: if (!$answer) { $answer="con_lost"; }
5171: return $answer;
5172: }
5173:
1.1 albertel 5174: # -------------------------------------------- Return path to profile directory
1.11 www 5175:
1.1 albertel 5176: sub propath {
5177: my ($udom,$uname)=@_;
5178: $udom=~s/\W//g;
5179: $uname=~s/\W//g;
1.16 www 5180: my $subdir=$uname.'__';
1.1 albertel 5181: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5182: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
5183: return $proname;
5184: }
5185:
5186: # --------------------------------------- Is this the home server of an author?
1.11 www 5187:
1.1 albertel 5188: sub ishome {
5189: my $author=shift;
5190: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5191: my ($udom,$uname)=split(/\//,$author);
5192: my $proname=propath($udom,$uname);
5193: if (-e $proname) {
5194: return 'owner';
5195: } else {
5196: return 'not_owner';
5197: }
5198: }
5199:
5200: # ======================================================= Continue main program
5201: # ---------------------------------------------------- Fork once and dissociate
5202:
1.134 albertel 5203: my $fpid=fork;
1.1 albertel 5204: exit if $fpid;
1.29 harris41 5205: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 5206:
1.29 harris41 5207: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 5208:
5209: # ------------------------------------------------------- Write our PID on disk
5210:
1.134 albertel 5211: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 5212: open (PIDSAVE,">$execdir/logs/lond.pid");
5213: print PIDSAVE "$$\n";
5214: close(PIDSAVE);
1.190 albertel 5215: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 5216: &status('Starting');
1.1 albertel 5217:
1.106 foxr 5218:
1.1 albertel 5219:
5220: # ----------------------------------------------------- Install signal handlers
5221:
1.57 www 5222:
1.1 albertel 5223: $SIG{CHLD} = \&REAPER;
5224: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5225: $SIG{HUP} = \&HUPSMAN;
1.57 www 5226: $SIG{USR1} = \&checkchildren;
1.144 foxr 5227: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 5228:
1.148 foxr 5229: # Read the host hashes:
5230:
5231: ReadHostTable;
1.106 foxr 5232:
1.286 albertel 5233: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5234:
1.106 foxr 5235: # --------------------------------------------------------------
5236: # Accept connections. When a connection comes in, it is validated
5237: # and if good, a child process is created to process transactions
5238: # along the connection.
5239:
1.1 albertel 5240: while (1) {
1.165 albertel 5241: &status('Starting accept');
1.106 foxr 5242: $client = $server->accept() or next;
1.165 albertel 5243: &status('Accepted '.$client.' off to spawn');
1.106 foxr 5244: make_new_child($client);
1.165 albertel 5245: &status('Finished spawning');
1.1 albertel 5246: }
5247:
1.212 foxr 5248: sub make_new_child {
5249: my $pid;
5250: # my $cipher; # Now global
5251: my $sigset;
1.178 foxr 5252:
1.212 foxr 5253: $client = shift;
5254: &status('Starting new child '.$client);
5255: &logthis('<font color="green"> Attempting to start child ('.$client.
5256: ")</font>");
5257: # block signal for fork
5258: $sigset = POSIX::SigSet->new(SIGINT);
5259: sigprocmask(SIG_BLOCK, $sigset)
5260: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 5261:
1.212 foxr 5262: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 5263:
1.212 foxr 5264: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5265: # connection liveness.
1.178 foxr 5266:
1.212 foxr 5267: #
5268: # Figure out who we're talking to so we can record the peer in
5269: # the pid hash.
5270: #
5271: my $caller = getpeername($client);
5272: my ($port,$iaddr);
5273: if (defined($caller) && length($caller) > 0) {
5274: ($port,$iaddr)=unpack_sockaddr_in($caller);
5275: } else {
5276: &logthis("Unable to determine who caller was, getpeername returned nothing");
5277: }
5278: if (defined($iaddr)) {
5279: $clientip = inet_ntoa($iaddr);
5280: Debug("Connected with $clientip");
5281: } else {
5282: &logthis("Unable to determine clientip");
5283: $clientip='Unavailable';
5284: }
5285:
5286: if ($pid) {
5287: # Parent records the child's birth and returns.
5288: sigprocmask(SIG_UNBLOCK, $sigset)
5289: or die "Can't unblock SIGINT for fork: $!\n";
5290: $children{$pid} = $clientip;
5291: &status('Started child '.$pid);
5292: return;
5293: } else {
5294: # Child can *not* return from this subroutine.
5295: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5296: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5297: #don't get intercepted
5298: $SIG{USR1}= \&logstatus;
5299: $SIG{ALRM}= \&timeout;
5300: $lastlog='Forked ';
5301: $status='Forked';
1.178 foxr 5302:
1.212 foxr 5303: # unblock signals
5304: sigprocmask(SIG_UNBLOCK, $sigset)
5305: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 5306:
1.212 foxr 5307: # my $tmpsnum=0; # Now global
5308: #---------------------------------------------------- kerberos 5 initialization
5309: &Authen::Krb5::init_context();
1.297 raeburn 5310: unless (($dist eq 'fedora4') || ($dist eq 'suse9.3')) {
1.286 albertel 5311: &Authen::Krb5::init_ets();
5312: }
1.209 albertel 5313:
1.212 foxr 5314: &status('Accepted connection');
5315: # =============================================================================
5316: # do something with the connection
5317: # -----------------------------------------------------------------------------
5318: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 5319:
1.212 foxr 5320: ReadManagerTable; # May also be a manager!!
5321:
1.278 albertel 5322: my $outsideip=$clientip;
5323: if ($clientip eq '127.0.0.1') {
5324: $outsideip=$hostip{$perlvar{'lonHostID'}};
5325: }
5326:
5327: my $clientrec=($hostid{$outsideip} ne undef);
5328: my $ismanager=($managers{$outsideip} ne undef);
1.212 foxr 5329: $clientname = "[unknonwn]";
5330: if($clientrec) { # Establish client type.
5331: $ConnectionType = "client";
1.278 albertel 5332: $clientname = $hostid{$outsideip};
1.212 foxr 5333: if($ismanager) {
5334: $ConnectionType = "both";
5335: }
5336: } else {
5337: $ConnectionType = "manager";
1.278 albertel 5338: $clientname = $managers{$outsideip};
1.212 foxr 5339: }
5340: my $clientok;
1.178 foxr 5341:
1.212 foxr 5342: if ($clientrec || $ismanager) {
5343: &status("Waiting for init from $clientip $clientname");
5344: &logthis('<font color="yellow">INFO: Connection, '.
5345: $clientip.
5346: " ($clientname) connection type = $ConnectionType </font>" );
5347: &status("Connecting $clientip ($clientname))");
5348: my $remotereq=<$client>;
5349: chomp($remotereq);
5350: Debug("Got init: $remotereq");
5351: my $inikeyword = split(/:/, $remotereq);
5352: if ($remotereq =~ /^init/) {
5353: &sethost("sethost:$perlvar{'lonHostID'}");
5354: #
5355: # If the remote is attempting a local init... give that a try:
5356: #
5357: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 5358:
1.212 foxr 5359: # If the connection type is ssl, but I didn't get my
5360: # certificate files yet, then I'll drop back to
5361: # insecure (if allowed).
5362:
5363: if($inittype eq "ssl") {
5364: my ($ca, $cert) = lonssl::CertificateFile;
5365: my $kfile = lonssl::KeyFile;
5366: if((!$ca) ||
5367: (!$cert) ||
5368: (!$kfile)) {
5369: $inittype = ""; # This forces insecure attempt.
5370: &logthis("<font color=\"blue\"> Certificates not "
5371: ."installed -- trying insecure auth</font>");
1.224 foxr 5372: } else { # SSL certificates are in place so
1.212 foxr 5373: } # Leave the inittype alone.
5374: }
5375:
5376: if($inittype eq "local") {
5377: my $key = LocalConnection($client, $remotereq);
5378: if($key) {
5379: Debug("Got local key $key");
5380: $clientok = 1;
5381: my $cipherkey = pack("H32", $key);
5382: $cipher = new IDEA($cipherkey);
5383: print $client "ok:local\n";
5384: &logthis('<font color="green"'
5385: . "Successful local authentication </font>");
5386: $keymode = "local"
1.178 foxr 5387: } else {
1.212 foxr 5388: Debug("Failed to get local key");
5389: $clientok = 0;
5390: shutdown($client, 3);
5391: close $client;
1.178 foxr 5392: }
1.212 foxr 5393: } elsif ($inittype eq "ssl") {
5394: my $key = SSLConnection($client);
5395: if ($key) {
5396: $clientok = 1;
5397: my $cipherkey = pack("H32", $key);
5398: $cipher = new IDEA($cipherkey);
5399: &logthis('<font color="green">'
5400: ."Successfull ssl authentication with $clientname </font>");
5401: $keymode = "ssl";
5402:
1.178 foxr 5403: } else {
1.212 foxr 5404: $clientok = 0;
5405: close $client;
1.178 foxr 5406: }
1.212 foxr 5407:
5408: } else {
5409: my $ok = InsecureConnection($client);
5410: if($ok) {
5411: $clientok = 1;
5412: &logthis('<font color="green">'
5413: ."Successful insecure authentication with $clientname </font>");
5414: print $client "ok\n";
5415: $keymode = "insecure";
1.178 foxr 5416: } else {
1.212 foxr 5417: &logthis('<font color="yellow">'
5418: ."Attempted insecure connection disallowed </font>");
5419: close $client;
5420: $clientok = 0;
1.178 foxr 5421:
5422: }
5423: }
1.212 foxr 5424: } else {
5425: &logthis(
5426: "<font color='blue'>WARNING: "
5427: ."$clientip failed to initialize: >$remotereq< </font>");
5428: &status('No init '.$clientip);
5429: }
5430:
5431: } else {
5432: &logthis(
5433: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5434: &status('Hung up on '.$clientip);
5435: }
5436:
5437: if ($clientok) {
5438: # ---------------- New known client connecting, could mean machine online again
5439:
5440: foreach my $id (keys(%hostip)) {
5441: if ($hostip{$id} ne $clientip ||
5442: $hostip{$currenthostid} eq $clientip) {
5443: # no need to try to do recon's to myself
5444: next;
5445: }
1.307 albertel 5446: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$id});
1.212 foxr 5447: }
5448: &logthis("<font color='green'>Established connection: $clientname</font>");
5449: &status('Will listen to '.$clientname);
5450: # ------------------------------------------------------------ Process requests
5451: my $keep_going = 1;
5452: my $user_input;
5453: while(($user_input = get_request) && $keep_going) {
5454: alarm(120);
5455: Debug("Main: Got $user_input\n");
5456: $keep_going = &process_request($user_input);
1.178 foxr 5457: alarm(0);
1.212 foxr 5458: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 5459: }
1.212 foxr 5460:
1.59 www 5461: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 5462: } else {
1.161 foxr 5463: print $client "refused\n";
5464: $client->close();
1.190 albertel 5465: &logthis("<font color='blue'>WARNING: "
1.161 foxr 5466: ."Rejected client $clientip, closing connection</font>");
5467: }
1.212 foxr 5468: }
1.161 foxr 5469:
1.1 albertel 5470: # =============================================================================
1.161 foxr 5471:
1.190 albertel 5472: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 5473: ."Disconnect from $clientip ($clientname)</font>");
5474:
5475:
5476: # this exit is VERY important, otherwise the child will become
5477: # a producer of more and more children, forking yourself into
5478: # process death.
5479: exit;
1.106 foxr 5480:
1.78 foxr 5481: }
1.261 foxr 5482: #
5483: # Determine if a user is an author for the indicated domain.
5484: #
5485: # Parameters:
5486: # domain - domain to check in .
5487: # user - Name of user to check.
5488: #
5489: # Return:
5490: # 1 - User is an author for domain.
5491: # 0 - User is not an author for domain.
5492: sub is_author {
5493: my ($domain, $user) = @_;
5494:
5495: &Debug("is_author: $user @ $domain");
5496:
5497: my $hashref = &tie_user_hash($domain, $user, "roles",
5498: &GDBM_READER());
5499:
5500: # Author role should show up as a key /domain/_au
1.78 foxr 5501:
1.261 foxr 5502: my $key = "/$domain/_au";
5503: my $value = $hashref->{$key};
1.78 foxr 5504:
1.261 foxr 5505: if(defined($value)) {
5506: &Debug("$user @ $domain is an author");
5507: }
5508:
5509: return defined($value);
5510: }
1.78 foxr 5511: #
5512: # Checks to see if the input roleput request was to set
5513: # an author role. If so, invokes the lchtmldir script to set
5514: # up a correct public_html
5515: # Parameters:
5516: # request - The request sent to the rolesput subchunk.
5517: # We're looking for /domain/_au
5518: # domain - The domain in which the user is having roles doctored.
5519: # user - Name of the user for which the role is being put.
5520: # authtype - The authentication type associated with the user.
5521: #
1.289 albertel 5522: sub manage_permissions {
1.192 foxr 5523: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 5524:
1.261 foxr 5525: &Debug("manage_permissions: $request $domain $user $authtype");
5526:
1.78 foxr 5527: # See if the request is of the form /$domain/_au
1.289 albertel 5528: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.78 foxr 5529: my $execdir = $perlvar{'lonDaemons'};
5530: my $userhome= "/home/$user" ;
1.134 albertel 5531: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 5532: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 5533: system("$execdir/lchtmldir $userhome $user $authtype");
5534: }
5535: }
1.222 foxr 5536:
5537:
5538: #
5539: # Return the full path of a user password file, whether it exists or not.
5540: # Parameters:
5541: # domain - Domain in which the password file lives.
5542: # user - name of the user.
5543: # Returns:
5544: # Full passwd path:
5545: #
5546: sub password_path {
5547: my ($domain, $user) = @_;
1.264 albertel 5548: return &propath($domain, $user).'/passwd';
1.222 foxr 5549: }
5550:
5551: # Password Filename
5552: # Returns the path to a passwd file given domain and user... only if
5553: # it exists.
5554: # Parameters:
5555: # domain - Domain in which to search.
5556: # user - username.
5557: # Returns:
5558: # - If the password file exists returns its path.
5559: # - If the password file does not exist, returns undefined.
5560: #
5561: sub password_filename {
5562: my ($domain, $user) = @_;
5563:
5564: Debug ("PasswordFilename called: dom = $domain user = $user");
5565:
5566: my $path = &password_path($domain, $user);
5567: Debug("PasswordFilename got path: $path");
5568: if(-e $path) {
5569: return $path;
5570: } else {
5571: return undef;
5572: }
5573: }
5574:
5575: #
5576: # Rewrite the contents of the user's passwd file.
5577: # Parameters:
5578: # domain - domain of the user.
5579: # name - User's name.
5580: # contents - New contents of the file.
5581: # Returns:
5582: # 0 - Failed.
5583: # 1 - Success.
5584: #
5585: sub rewrite_password_file {
5586: my ($domain, $user, $contents) = @_;
5587:
5588: my $file = &password_filename($domain, $user);
5589: if (defined $file) {
5590: my $pf = IO::File->new(">$file");
5591: if($pf) {
5592: print $pf "$contents\n";
5593: return 1;
5594: } else {
5595: return 0;
5596: }
5597: } else {
5598: return 0;
5599: }
5600:
5601: }
5602:
1.78 foxr 5603: #
1.222 foxr 5604: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5605:
5606: # Returns the authorization type or nouser if there is no such user.
5607: #
1.222 foxr 5608: sub get_auth_type
1.78 foxr 5609: {
1.192 foxr 5610:
5611: my ($domain, $user) = @_;
1.78 foxr 5612:
1.222 foxr 5613: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5614: my $proname = &propath($domain, $user);
5615: my $passwdfile = "$proname/passwd";
5616: if( -e $passwdfile ) {
5617: my $pf = IO::File->new($passwdfile);
5618: my $realpassword = <$pf>;
5619: chomp($realpassword);
1.79 foxr 5620: Debug("Password info = $realpassword\n");
1.78 foxr 5621: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5622: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5623: return "$authtype:$contentpwd";
1.224 foxr 5624: } else {
1.79 foxr 5625: Debug("Returning nouser");
1.78 foxr 5626: return "nouser";
5627: }
1.1 albertel 5628: }
5629:
1.220 foxr 5630: #
5631: # Validate a user given their domain, name and password. This utility
5632: # function is used by both AuthenticateHandler and ChangePasswordHandler
5633: # to validate the login credentials of a user.
5634: # Parameters:
5635: # $domain - The domain being logged into (this is required due to
5636: # the capability for multihomed systems.
5637: # $user - The name of the user being validated.
5638: # $password - The user's propoposed password.
5639: #
5640: # Returns:
5641: # 1 - The domain,user,pasword triplet corresponds to a valid
5642: # user.
5643: # 0 - The domain,user,password triplet is not a valid user.
5644: #
5645: sub validate_user {
5646: my ($domain, $user, $password) = @_;
5647:
5648:
5649: # Why negative ~pi you may well ask? Well this function is about
5650: # authentication, and therefore very important to get right.
5651: # I've initialized the flag that determines whether or not I've
5652: # validated correctly to a value it's not supposed to get.
5653: # At the end of this function. I'll ensure that it's not still that
5654: # value so we don't just wind up returning some accidental value
5655: # as a result of executing an unforseen code path that
1.249 foxr 5656: # did not set $validated. At the end of valid execution paths,
5657: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5658:
5659: my $validated = -3.14159;
5660:
5661: # How we authenticate is determined by the type of authentication
5662: # the user has been assigned. If the authentication type is
5663: # "nouser", the user does not exist so we will return 0.
5664:
1.222 foxr 5665: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5666: my ($howpwd, $contentpwd) = split(/:/, $contents);
5667:
5668: my $null = pack("C",0); # Used by kerberos auth types.
5669:
5670: if ($howpwd ne 'nouser') {
5671:
5672: if($howpwd eq "internal") { # Encrypted is in local password file.
5673: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5674: }
5675: elsif ($howpwd eq "unix") { # User is a normal unix user.
5676: $contentpwd = (getpwnam($user))[1];
5677: if($contentpwd) {
5678: if($contentpwd eq 'x') { # Shadow password file...
5679: my $pwauth_path = "/usr/local/sbin/pwauth";
5680: open PWAUTH, "|$pwauth_path" or
5681: die "Cannot invoke authentication";
5682: print PWAUTH "$user\n$password\n";
5683: close PWAUTH;
5684: $validated = ! $?;
5685:
5686: } else { # Passwords in /etc/passwd.
5687: $validated = (crypt($password,
5688: $contentpwd) eq $contentpwd);
5689: }
5690: } else {
5691: $validated = 0;
5692: }
5693: }
5694: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5695: if(! ($password =~ /$null/) ) {
5696: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5697: "",
5698: $contentpwd,,
5699: 'krbtgt',
5700: $contentpwd,
5701: 1,
5702: $password);
5703: if(!$k4error) {
5704: $validated = 1;
1.224 foxr 5705: } else {
1.220 foxr 5706: $validated = 0;
5707: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5708: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5709: }
1.224 foxr 5710: } else {
1.220 foxr 5711: $validated = 0; # Password has a match with null.
5712: }
1.224 foxr 5713: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5714: if(!($password =~ /$null/)) { # Null password not allowed.
5715: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5716: .$contentpwd);
5717: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5718: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5719: my $credentials= &Authen::Krb5::cc_default();
5720: $credentials->initialize($krbclient);
1.270 matthew 5721: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
1.220 foxr 5722: $krbserver,
5723: $password,
5724: $credentials);
5725: $validated = ($krbreturn == 1);
1.224 foxr 5726: } else {
1.220 foxr 5727: $validated = 0;
5728: }
1.224 foxr 5729: } elsif ($howpwd eq "localauth") {
1.220 foxr 5730: # Authenticate via installation specific authentcation method:
5731: $validated = &localauth::localauth($user,
5732: $password,
5733: $contentpwd);
1.224 foxr 5734: } else { # Unrecognized auth is also bad.
1.220 foxr 5735: $validated = 0;
5736: }
5737: } else {
5738: $validated = 0;
5739: }
5740: #
5741: # $validated has the correct stat of the authentication:
5742: #
5743:
5744: unless ($validated != -3.14159) {
1.249 foxr 5745: # I >really really< want to know if this happens.
5746: # since it indicates that user authentication is badly
5747: # broken in some code path.
5748: #
5749: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5750: }
5751: return $validated;
5752: }
5753:
5754:
1.84 albertel 5755: sub addline {
5756: my ($fname,$hostid,$ip,$newline)=@_;
5757: my $contents;
5758: my $found=0;
5759: my $expr='^'.$hostid.':'.$ip.':';
5760: $expr =~ s/\./\\\./g;
1.134 albertel 5761: my $sh;
1.84 albertel 5762: if ($sh=IO::File->new("$fname.subscription")) {
5763: while (my $subline=<$sh>) {
5764: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5765: }
5766: $sh->close();
5767: }
5768: $sh=IO::File->new(">$fname.subscription");
5769: if ($contents) { print $sh $contents; }
5770: if ($newline) { print $sh $newline; }
5771: $sh->close();
5772: return $found;
1.86 www 5773: }
5774:
1.234 foxr 5775: sub get_chat {
1.122 www 5776: my ($cdom,$cname,$udom,$uname)=@_;
1.310 albertel 5777:
1.87 www 5778: my @entries=();
1.310 albertel 5779: my $hashref = &tie_user_hash($cdom, $cname, 'nohist_chatroom',
5780: &GDBM_READER());
5781: if ($hashref) {
5782: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311 albertel 5783: &untie_user_hash($hashref);
1.123 www 5784: }
1.124 www 5785: my @participants=();
1.134 albertel 5786: my $cutoff=time-60;
1.310 albertel 5787: $hashref = &tie_user_hash($cdom, $cname, 'nohist_inchatroom',
5788: &GDBM_WRCREAT());
5789: if ($hashref) {
5790: $hashref->{$uname.':'.$udom}=time;
5791: foreach my $user (sort(keys(%$hashref))) {
5792: if ($hashref->{$user}>$cutoff) {
5793: push(@participants, 'active_participant:'.$user);
1.123 www 5794: }
5795: }
1.311 albertel 5796: &untie_user_hash($hashref);
1.86 www 5797: }
1.124 www 5798: return (@participants,@entries);
1.86 www 5799: }
5800:
1.234 foxr 5801: sub chat_add {
1.88 albertel 5802: my ($cdom,$cname,$newchat)=@_;
5803: my @entries=();
1.142 www 5804: my $time=time;
1.310 albertel 5805: my $hashref = &tie_user_hash($cdom, $cname, 'nohist_chatroom',
5806: &GDBM_WRCREAT());
5807: if ($hashref) {
5808: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88 albertel 5809: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5810: my ($thentime,$idnum)=split(/\_/,$lastid);
5811: my $newid=$time.'_000000';
5812: if ($thentime==$time) {
5813: $idnum=~s/^0+//;
5814: $idnum++;
5815: $idnum=substr('000000'.$idnum,-6,6);
5816: $newid=$time.'_'.$idnum;
5817: }
1.310 albertel 5818: $hashref->{$newid}=$newchat;
1.88 albertel 5819: my $expired=$time-3600;
1.310 albertel 5820: foreach my $comment (keys(%$hashref)) {
5821: my ($thistime) = ($comment=~/(\d+)\_/);
1.88 albertel 5822: if ($thistime<$expired) {
1.310 albertel 5823: delete $hashref->{$comment};
1.88 albertel 5824: }
5825: }
1.310 albertel 5826: {
5827: my $proname=&propath($cdom,$cname);
5828: if (open(CHATLOG,">>$proname/chatroom.log")) {
5829: print CHATLOG ("$time:".&unescape($newchat)."\n");
5830: }
5831: close(CHATLOG);
1.142 www 5832: }
1.311 albertel 5833: &untie_user_hash($hashref);
1.86 www 5834: }
1.84 albertel 5835: }
5836:
5837: sub unsub {
5838: my ($fname,$clientip)=@_;
5839: my $result;
1.188 foxr 5840: my $unsubs = 0; # Number of successful unsubscribes:
5841:
5842:
5843: # An old way subscriptions were handled was to have a
5844: # subscription marker file:
5845:
5846: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5847: if (unlink("$fname.$clientname")) {
1.188 foxr 5848: $unsubs++; # Successful unsub via marker file.
5849: }
5850:
5851: # The more modern way to do it is to have a subscription list
5852: # file:
5853:
1.84 albertel 5854: if (-e "$fname.subscription") {
1.161 foxr 5855: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5856: if ($found) {
5857: $unsubs++;
5858: }
5859: }
5860:
5861: # If either or both of these mechanisms succeeded in unsubscribing a
5862: # resource we can return ok:
5863:
5864: if($unsubs) {
5865: $result = "ok\n";
1.84 albertel 5866: } else {
1.188 foxr 5867: $result = "not_subscribed\n";
1.84 albertel 5868: }
1.188 foxr 5869:
1.84 albertel 5870: return $result;
5871: }
5872:
1.101 www 5873: sub currentversion {
5874: my $fname=shift;
5875: my $version=-1;
5876: my $ulsdir='';
5877: if ($fname=~/^(.+)\/[^\/]+$/) {
5878: $ulsdir=$1;
5879: }
1.114 albertel 5880: my ($fnamere1,$fnamere2);
5881: # remove version if already specified
1.101 www 5882: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5883: # get the bits that go before and after the version number
5884: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5885: $fnamere1=$1;
5886: $fnamere2='.'.$2;
5887: }
1.101 www 5888: if (-e $fname) { $version=1; }
5889: if (-e $ulsdir) {
1.134 albertel 5890: if(-d $ulsdir) {
5891: if (opendir(LSDIR,$ulsdir)) {
5892: my $ulsfn;
5893: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5894: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5895: my $thisfile=$ulsdir.'/'.$ulsfn;
5896: unless (-l $thisfile) {
1.160 www 5897: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5898: if ($1>$version) { $version=$1; }
5899: }
5900: }
5901: }
5902: closedir(LSDIR);
5903: $version++;
5904: }
5905: }
5906: }
5907: return $version;
1.101 www 5908: }
5909:
5910: sub thisversion {
5911: my $fname=shift;
5912: my $version=-1;
5913: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5914: $version=$1;
5915: }
5916: return $version;
5917: }
5918:
1.84 albertel 5919: sub subscribe {
5920: my ($userinput,$clientip)=@_;
5921: my $result;
1.293 albertel 5922: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 5923: my $ownership=&ishome($fname);
5924: if ($ownership eq 'owner') {
1.101 www 5925: # explitly asking for the current version?
5926: unless (-e $fname) {
5927: my $currentversion=¤tversion($fname);
5928: if (&thisversion($fname)==$currentversion) {
5929: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5930: my $root=$1;
5931: my $extension=$2;
5932: symlink($root.'.'.$extension,
5933: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5934: unless ($extension=~/\.meta$/) {
5935: symlink($root.'.'.$extension.'.meta',
5936: $root.'.'.$currentversion.'.'.$extension.'.meta');
5937: }
1.101 www 5938: }
5939: }
5940: }
1.84 albertel 5941: if (-e $fname) {
5942: if (-d $fname) {
5943: $result="directory\n";
5944: } else {
1.161 foxr 5945: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5946: my $now=time;
1.161 foxr 5947: my $found=&addline($fname,$clientname,$clientip,
5948: "$clientname:$clientip:$now\n");
1.84 albertel 5949: if ($found) { $result="$fname\n"; }
5950: # if they were subscribed to only meta data, delete that
5951: # subscription, when you subscribe to a file you also get
5952: # the metadata
5953: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5954: $fname=~s/\/home\/httpd\/html\/res/raw/;
5955: $fname="http://$thisserver/".$fname;
5956: $result="$fname\n";
5957: }
5958: } else {
5959: $result="not_found\n";
5960: }
5961: } else {
5962: $result="rejected\n";
5963: }
5964: return $result;
5965: }
1.287 foxr 5966: # Change the passwd of a unix user. The caller must have
5967: # first verified that the user is a loncapa user.
5968: #
5969: # Parameters:
5970: # user - Unix user name to change.
5971: # pass - New password for the user.
5972: # Returns:
5973: # ok - if success
5974: # other - Some meaningfule error message string.
5975: # NOTE:
5976: # invokes a setuid script to change the passwd.
5977: sub change_unix_password {
5978: my ($user, $pass) = @_;
5979:
5980: &Debug("change_unix_password");
5981: my $execdir=$perlvar{'lonDaemons'};
5982: &Debug("Opening lcpasswd pipeline");
5983: my $pf = IO::File->new("|$execdir/lcpasswd > "
5984: ."$perlvar{'lonDaemons'}"
5985: ."/logs/lcpasswd.log");
5986: print $pf "$user\n$pass\n$pass\n";
5987: close $pf;
5988: my $err = $?;
5989: return ($err < @passwderrors) ? $passwderrors[$err] :
5990: "pwchange_falure - unknown error";
5991:
5992:
5993: }
5994:
1.91 albertel 5995:
5996: sub make_passwd_file {
1.98 foxr 5997: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5998: my $result="ok\n";
5999: if ($umode eq 'krb4' or $umode eq 'krb5') {
6000: {
6001: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6002: if ($pf) {
6003: print $pf "$umode:$npass\n";
6004: } else {
6005: $result = "pass_file_failed_error";
6006: }
1.91 albertel 6007: }
6008: } elsif ($umode eq 'internal') {
6009: my $salt=time;
6010: $salt=substr($salt,6,2);
6011: my $ncpass=crypt($npass,$salt);
6012: {
6013: &Debug("Creating internal auth");
6014: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6015: if($pf) {
6016: print $pf "internal:$ncpass\n";
6017: } else {
6018: $result = "pass_file_failed_error";
6019: }
1.91 albertel 6020: }
6021: } elsif ($umode eq 'localauth') {
6022: {
6023: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6024: if($pf) {
6025: print $pf "localauth:$npass\n";
6026: } else {
6027: $result = "pass_file_failed_error";
6028: }
1.91 albertel 6029: }
6030: } elsif ($umode eq 'unix') {
6031: {
1.186 foxr 6032: #
6033: # Don't allow the creation of privileged accounts!!! that would
6034: # be real bad!!!
6035: #
6036: my $uid = getpwnam($uname);
6037: if((defined $uid) && ($uid == 0)) {
6038: &logthis(">>>Attempted to create privilged account blocked");
6039: return "no_priv_account_error\n";
6040: }
6041:
1.223 foxr 6042: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 6043:
6044: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 6045: {
6046: &Debug("Executing external: ".$execpath);
1.98 foxr 6047: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 6048: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 6049: print $se "$uname\n";
6050: print $se "$npass\n";
6051: print $se "$npass\n";
1.223 foxr 6052: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 6053: }
1.285 foxr 6054: if (-r $lc_error_file) {
6055: &Debug("Opening error file: $lc_error_file");
6056: my $error = IO::File->new("< $lc_error_file");
6057: my $useraddok = <$error>;
6058: $error->close;
6059: unlink($lc_error_file);
6060:
6061: chomp $useraddok;
6062:
6063: if($useraddok > 0) {
6064: my $error_text = &lcuseraddstrerror($useraddok);
6065: &logthis("Failed lcuseradd: $error_text");
6066: $result = "lcuseradd_failed:$error_text\n";
6067: } else {
6068: my $pf = IO::File->new(">$passfilename");
6069: if($pf) {
6070: print $pf "unix:\n";
6071: } else {
6072: $result = "pass_file_failed_error";
6073: }
6074: }
1.224 foxr 6075: } else {
1.285 foxr 6076: &Debug("Could not locate lcuseradd error: $lc_error_file");
6077: $result="bug_lcuseradd_no_output_file";
1.91 albertel 6078: }
6079: }
6080: } elsif ($umode eq 'none') {
6081: {
1.223 foxr 6082: my $pf = IO::File->new("> $passfilename");
1.261 foxr 6083: if($pf) {
6084: print $pf "none:\n";
6085: } else {
6086: $result = "pass_file_failed_error";
6087: }
1.91 albertel 6088: }
6089: } else {
6090: $result="auth_mode_error\n";
6091: }
6092: return $result;
1.121 albertel 6093: }
6094:
1.265 albertel 6095: sub convert_photo {
6096: my ($start,$dest)=@_;
6097: system("convert $start $dest");
6098: }
6099:
1.121 albertel 6100: sub sethost {
6101: my ($remotereq) = @_;
6102: my (undef,$hostid)=split(/:/,$remotereq);
6103: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
6104: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 6105: $currenthostid =$hostid;
1.121 albertel 6106: $currentdomainid=$hostdom{$hostid};
6107: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
6108: } else {
6109: &logthis("Requested host id $hostid not an alias of ".
6110: $perlvar{'lonHostID'}." refusing connection");
6111: return 'unable_to_set';
6112: }
6113: return 'ok';
6114: }
6115:
6116: sub version {
6117: my ($userinput)=@_;
6118: $remoteVERSION=(split(/:/,$userinput))[1];
6119: return "version:$VERSION";
1.127 albertel 6120: }
1.178 foxr 6121:
1.128 albertel 6122: #There is a copy of this in lonnet.pm
1.127 albertel 6123: sub userload {
6124: my $numusers=0;
6125: {
6126: opendir(LONIDS,$perlvar{'lonIDsDir'});
6127: my $filename;
6128: my $curtime=time;
6129: while ($filename=readdir(LONIDS)) {
6130: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 6131: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 6132: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 6133: }
6134: closedir(LONIDS);
6135: }
6136: my $userloadpercent=0;
6137: my $maxuserload=$perlvar{'lonUserLoadLim'};
6138: if ($maxuserload) {
1.129 albertel 6139: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 6140: }
1.130 albertel 6141: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 6142: return $userloadpercent;
1.91 albertel 6143: }
6144:
1.205 raeburn 6145: # Routines for serializing arrays and hashes (copies from lonnet)
6146:
6147: sub array2str {
6148: my (@array) = @_;
6149: my $result=&arrayref2str(\@array);
6150: $result=~s/^__ARRAY_REF__//;
6151: $result=~s/__END_ARRAY_REF__$//;
6152: return $result;
6153: }
6154:
6155: sub arrayref2str {
6156: my ($arrayref) = @_;
6157: my $result='__ARRAY_REF__';
6158: foreach my $elem (@$arrayref) {
6159: if(ref($elem) eq 'ARRAY') {
6160: $result.=&arrayref2str($elem).'&';
6161: } elsif(ref($elem) eq 'HASH') {
6162: $result.=&hashref2str($elem).'&';
6163: } elsif(ref($elem)) {
6164: #print("Got a ref of ".(ref($elem))." skipping.");
6165: } else {
6166: $result.=&escape($elem).'&';
6167: }
6168: }
6169: $result=~s/\&$//;
6170: $result .= '__END_ARRAY_REF__';
6171: return $result;
6172: }
6173:
6174: sub hash2str {
6175: my (%hash) = @_;
6176: my $result=&hashref2str(\%hash);
6177: $result=~s/^__HASH_REF__//;
6178: $result=~s/__END_HASH_REF__$//;
6179: return $result;
6180: }
6181:
6182: sub hashref2str {
6183: my ($hashref)=@_;
6184: my $result='__HASH_REF__';
6185: foreach (sort(keys(%$hashref))) {
6186: if (ref($_) eq 'ARRAY') {
6187: $result.=&arrayref2str($_).'=';
6188: } elsif (ref($_) eq 'HASH') {
6189: $result.=&hashref2str($_).'=';
6190: } elsif (ref($_)) {
6191: $result.='=';
6192: #print("Got a ref of ".(ref($_))." skipping.");
6193: } else {
6194: if ($_) {$result.=&escape($_).'=';} else { last; }
6195: }
6196:
6197: if(ref($hashref->{$_}) eq 'ARRAY') {
6198: $result.=&arrayref2str($hashref->{$_}).'&';
6199: } elsif(ref($hashref->{$_}) eq 'HASH') {
6200: $result.=&hashref2str($hashref->{$_}).'&';
6201: } elsif(ref($hashref->{$_})) {
6202: $result.='&';
6203: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
6204: } else {
6205: $result.=&escape($hashref->{$_}).'&';
6206: }
6207: }
6208: $result=~s/\&$//;
6209: $result .= '__END_HASH_REF__';
6210: return $result;
6211: }
1.200 matthew 6212:
1.61 harris41 6213: # ----------------------------------- POD (plain old documentation, CPAN style)
6214:
6215: =head1 NAME
6216:
6217: lond - "LON Daemon" Server (port "LOND" 5663)
6218:
6219: =head1 SYNOPSIS
6220:
1.74 harris41 6221: Usage: B<lond>
6222:
6223: Should only be run as user=www. This is a command-line script which
6224: is invoked by B<loncron>. There is no expectation that a typical user
6225: will manually start B<lond> from the command-line. (In other words,
6226: DO NOT START B<lond> YOURSELF.)
1.61 harris41 6227:
6228: =head1 DESCRIPTION
6229:
1.74 harris41 6230: There are two characteristics associated with the running of B<lond>,
6231: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6232: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6233: subscriptions, etc). These are described in two large
6234: sections below.
6235:
6236: B<PROCESS MANAGEMENT>
6237:
1.61 harris41 6238: Preforker - server who forks first. Runs as a daemon. HUPs.
6239: Uses IDEA encryption
6240:
1.74 harris41 6241: B<lond> forks off children processes that correspond to the other servers
6242: in the network. Management of these processes can be done at the
6243: parent process level or the child process level.
6244:
6245: B<logs/lond.log> is the location of log messages.
6246:
6247: The process management is now explained in terms of linux shell commands,
6248: subroutines internal to this code, and signal assignments:
6249:
6250: =over 4
6251:
6252: =item *
6253:
6254: PID is stored in B<logs/lond.pid>
6255:
6256: This is the process id number of the parent B<lond> process.
6257:
6258: =item *
6259:
6260: SIGTERM and SIGINT
6261:
6262: Parent signal assignment:
6263: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6264:
6265: Child signal assignment:
6266: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6267: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6268: to restart a new child.)
6269:
6270: Command-line invocations:
6271: B<kill> B<-s> SIGTERM I<PID>
6272: B<kill> B<-s> SIGINT I<PID>
6273:
6274: Subroutine B<HUNTSMAN>:
6275: This is only invoked for the B<lond> parent I<PID>.
6276: This kills all the children, and then the parent.
6277: The B<lonc.pid> file is cleared.
6278:
6279: =item *
6280:
6281: SIGHUP
6282:
6283: Current bug:
6284: This signal can only be processed the first time
6285: on the parent process. Subsequent SIGHUP signals
6286: have no effect.
6287:
6288: Parent signal assignment:
6289: $SIG{HUP} = \&HUPSMAN;
6290:
6291: Child signal assignment:
6292: none (nothing happens)
6293:
6294: Command-line invocations:
6295: B<kill> B<-s> SIGHUP I<PID>
6296:
6297: Subroutine B<HUPSMAN>:
6298: This is only invoked for the B<lond> parent I<PID>,
6299: This kills all the children, and then the parent.
6300: The B<lond.pid> file is cleared.
6301:
6302: =item *
6303:
6304: SIGUSR1
6305:
6306: Parent signal assignment:
6307: $SIG{USR1} = \&USRMAN;
6308:
6309: Child signal assignment:
6310: $SIG{USR1}= \&logstatus;
6311:
6312: Command-line invocations:
6313: B<kill> B<-s> SIGUSR1 I<PID>
6314:
6315: Subroutine B<USRMAN>:
6316: When invoked for the B<lond> parent I<PID>,
6317: SIGUSR1 is sent to all the children, and the status of
6318: each connection is logged.
1.144 foxr 6319:
6320: =item *
6321:
6322: SIGUSR2
6323:
6324: Parent Signal assignment:
6325: $SIG{USR2} = \&UpdateHosts
6326:
6327: Child signal assignment:
6328: NONE
6329:
1.74 harris41 6330:
6331: =item *
6332:
6333: SIGCHLD
6334:
6335: Parent signal assignment:
6336: $SIG{CHLD} = \&REAPER;
6337:
6338: Child signal assignment:
6339: none
6340:
6341: Command-line invocations:
6342: B<kill> B<-s> SIGCHLD I<PID>
6343:
6344: Subroutine B<REAPER>:
6345: This is only invoked for the B<lond> parent I<PID>.
6346: Information pertaining to the child is removed.
6347: The socket port is cleaned up.
6348:
6349: =back
6350:
6351: B<SERVER-SIDE ACTIVITIES>
6352:
6353: Server-side information can be accepted in an encrypted or non-encrypted
6354: method.
6355:
6356: =over 4
6357:
6358: =item ping
6359:
6360: Query a client in the hosts.tab table; "Are you there?"
6361:
6362: =item pong
6363:
6364: Respond to a ping query.
6365:
6366: =item ekey
6367:
6368: Read in encrypted key, make cipher. Respond with a buildkey.
6369:
6370: =item load
6371:
6372: Respond with CPU load based on a computation upon /proc/loadavg.
6373:
6374: =item currentauth
6375:
6376: Reply with current authentication information (only over an
6377: encrypted channel).
6378:
6379: =item auth
6380:
6381: Only over an encrypted channel, reply as to whether a user's
6382: authentication information can be validated.
6383:
6384: =item passwd
6385:
6386: Allow for a password to be set.
6387:
6388: =item makeuser
6389:
6390: Make a user.
6391:
6392: =item passwd
6393:
6394: Allow for authentication mechanism and password to be changed.
6395:
6396: =item home
1.61 harris41 6397:
1.74 harris41 6398: Respond to a question "are you the home for a given user?"
6399:
6400: =item update
6401:
6402: Update contents of a subscribed resource.
6403:
6404: =item unsubscribe
6405:
6406: The server is unsubscribing from a resource.
6407:
6408: =item subscribe
6409:
6410: The server is subscribing to a resource.
6411:
6412: =item log
6413:
6414: Place in B<logs/lond.log>
6415:
6416: =item put
6417:
6418: stores hash in namespace
6419:
1.230 foxr 6420: =item rolesputy
1.74 harris41 6421:
6422: put a role into a user's environment
6423:
6424: =item get
6425:
6426: returns hash with keys from array
6427: reference filled in from namespace
6428:
6429: =item eget
6430:
6431: returns hash with keys from array
6432: reference filled in from namesp (encrypts the return communication)
6433:
6434: =item rolesget
6435:
6436: get a role from a user's environment
6437:
6438: =item del
6439:
6440: deletes keys out of array from namespace
6441:
6442: =item keys
6443:
6444: returns namespace keys
6445:
6446: =item dump
6447:
6448: dumps the complete (or key matching regexp) namespace into a hash
6449:
6450: =item store
6451:
6452: stores hash permanently
6453: for this url; hashref needs to be given and should be a \%hashname; the
6454: remaining args aren't required and if they aren't passed or are '' they will
6455: be derived from the ENV
6456:
6457: =item restore
6458:
6459: returns a hash for a given url
6460:
6461: =item querysend
6462:
6463: Tells client about the lonsql process that has been launched in response
6464: to a sent query.
6465:
6466: =item queryreply
6467:
6468: Accept information from lonsql and make appropriate storage in temporary
6469: file space.
6470:
6471: =item idput
6472:
6473: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6474: for each student, defined perhaps by the institutional Registrar.)
6475:
6476: =item idget
6477:
6478: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6479: for each student, defined perhaps by the institutional Registrar.)
6480:
6481: =item tmpput
6482:
6483: Accept and store information in temporary space.
6484:
6485: =item tmpget
6486:
6487: Send along temporarily stored information.
6488:
6489: =item ls
6490:
6491: List part of a user's directory.
6492:
1.135 foxr 6493: =item pushtable
6494:
6495: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6496: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6497: must be restored manually in case of a problem with the new table file.
6498: pushtable requires that the request be encrypted and validated via
6499: ValidateManager. The form of the command is:
6500: enc:pushtable tablename <tablecontents> \n
6501: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6502: cleartext newline.
6503:
1.74 harris41 6504: =item Hanging up (exit or init)
6505:
6506: What to do when a client tells the server that they (the client)
6507: are leaving the network.
6508:
6509: =item unknown command
6510:
6511: If B<lond> is sent an unknown command (not in the list above),
6512: it replys to the client "unknown_cmd".
1.135 foxr 6513:
1.74 harris41 6514:
6515: =item UNKNOWN CLIENT
6516:
6517: If the anti-spoofing algorithm cannot verify the client,
6518: the client is rejected (with a "refused" message sent
6519: to the client, and the connection is closed.
6520:
6521: =back
1.61 harris41 6522:
6523: =head1 PREREQUISITES
6524:
6525: IO::Socket
6526: IO::File
6527: Apache::File
6528: Symbol
6529: POSIX
6530: Crypt::IDEA
6531: LWP::UserAgent()
6532: GDBM_File
6533: Authen::Krb4
1.91 albertel 6534: Authen::Krb5
1.61 harris41 6535:
6536: =head1 COREQUISITES
6537:
6538: =head1 OSNAMES
6539:
6540: linux
6541:
6542: =head1 SCRIPT CATEGORIES
6543:
6544: Server/Process
6545:
6546: =cut
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