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[LON-CAPA] /
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lond
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1.395:
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Thu Feb 21 16:04:19 2008 UTC (16 years, 3 months ago) by
raeburn
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If a domain is using institutional authentication (i.e., kerberos or localauth), and a user does not currently have a LON-CAPA account, try to authenticate using default authtype and autharg, if these were passed as arguments.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.395 2008/02/21 16:04:19 raeburn Exp $
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
13: # the Free Software Foundation; either version 2 of the License, or
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
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA;
35: use LONCAPA::Configuration;
36:
37: use IO::Socket;
38: use IO::File;
39: #use Apache::File;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
43: use Digest::MD5 qw(md5_hex);
44: use GDBM_File;
45: use Authen::Krb4;
46: use Authen::Krb5;
47: use localauth;
48: use localenroll;
49: use localstudentphoto;
50: use File::Copy;
51: use File::Find;
52: use LONCAPA::lonlocal;
53: use LONCAPA::lonssl;
54: use Fcntl qw(:flock);
55: use Apache::lonnet;
56:
57: my $DEBUG = 0; # Non zero to enable debug log entries.
58:
59: my $status='';
60: my $lastlog='';
61:
62: my $VERSION='$Revision: 1.395 $'; #' stupid emacs
63: my $remoteVERSION;
64: my $currenthostid="default";
65: my $currentdomainid;
66:
67: my $client;
68: my $clientip; # IP address of client.
69: my $clientname; # LonCAPA name of client.
70:
71: my $server;
72:
73: my $keymode;
74:
75: my $cipher; # Cipher key negotiated with client
76: my $tmpsnum = 0; # Id of tmpputs.
77:
78: #
79: # Connection type is:
80: # client - All client actions are allowed
81: # manager - only management functions allowed.
82: # both - Both management and client actions are allowed
83: #
84:
85: my $ConnectionType;
86:
87: my %managers; # Ip -> manager names
88:
89: my %perlvar; # Will have the apache conf defined perl vars.
90:
91: #
92: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
93: # Each element of the hash contains a reference to an array that contains:
94: # A reference to a sub that executes the request corresponding to the keyword.
95: # A flag that is true if the request must be encoded to be acceptable.
96: # A mask with bits as follows:
97: # CLIENT_OK - Set when the function is allowed by ordinary clients
98: # MANAGER_OK - Set when the function is allowed to manager clients.
99: #
100: my $CLIENT_OK = 1;
101: my $MANAGER_OK = 2;
102: my %Dispatcher;
103:
104:
105: #
106: # The array below are password error strings."
107: #
108: my $lastpwderror = 13; # Largest error number from lcpasswd.
109: my @passwderrors = ("ok",
110: "pwchange_failure - lcpasswd must be run as user 'www'",
111: "pwchange_failure - lcpasswd got incorrect number of arguments",
112: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
113: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
114: "pwchange_failure - lcpasswd User does not exist.",
115: "pwchange_failure - lcpasswd Incorrect current passwd",
116: "pwchange_failure - lcpasswd Unable to su to root.",
117: "pwchange_failure - lcpasswd Cannot set new passwd.",
118: "pwchange_failure - lcpasswd Username has invalid characters",
119: "pwchange_failure - lcpasswd Invalid characters in password",
120: "pwchange_failure - lcpasswd User already exists",
121: "pwchange_failure - lcpasswd Something went wrong with user addition.",
122: "pwchange_failure - lcpasswd Password mismatch",
123: "pwchange_failure - lcpasswd Error filename is invalid");
124:
125:
126: # The array below are lcuseradd error strings.:
127:
128: my $lastadderror = 13;
129: my @adderrors = ("ok",
130: "User ID mismatch, lcuseradd must run as user www",
131: "lcuseradd Incorrect number of command line parameters must be 3",
132: "lcuseradd Incorrect number of stdinput lines, must be 3",
133: "lcuseradd Too many other simultaneous pwd changes in progress",
134: "lcuseradd User does not exist",
135: "lcuseradd Unable to make www member of users's group",
136: "lcuseradd Unable to su to root",
137: "lcuseradd Unable to set password",
138: "lcuseradd Username has invalid characters",
139: "lcuseradd Password has an invalid character",
140: "lcuseradd User already exists",
141: "lcuseradd Could not add user.",
142: "lcuseradd Password mismatch");
143:
144:
145:
146: #
147: # Statistics that are maintained and dislayed in the status line.
148: #
149: my $Transactions = 0; # Number of attempted transactions.
150: my $Failures = 0; # Number of transcations failed.
151:
152: # ResetStatistics:
153: # Resets the statistics counters:
154: #
155: sub ResetStatistics {
156: $Transactions = 0;
157: $Failures = 0;
158: }
159:
160: #------------------------------------------------------------------------
161: #
162: # LocalConnection
163: # Completes the formation of a locally authenticated connection.
164: # This function will ensure that the 'remote' client is really the
165: # local host. If not, the connection is closed, and the function fails.
166: # If so, initcmd is parsed for the name of a file containing the
167: # IDEA session key. The fie is opened, read, deleted and the session
168: # key returned to the caller.
169: #
170: # Parameters:
171: # $Socket - Socket open on client.
172: # $initcmd - The full text of the init command.
173: #
174: # Returns:
175: # IDEA session key on success.
176: # undef on failure.
177: #
178: sub LocalConnection {
179: my ($Socket, $initcmd) = @_;
180: Debug("Attempting local connection: $initcmd client: $clientip");
181: if($clientip ne "127.0.0.1") {
182: &logthis('<font color="red"> LocalConnection rejecting non local: '
183: ."$clientip ne 127.0.0.1 </font>");
184: close $Socket;
185: return undef;
186: } else {
187: chomp($initcmd); # Get rid of \n in filename.
188: my ($init, $type, $name) = split(/:/, $initcmd);
189: Debug(" Init command: $init $type $name ");
190:
191: # Require that $init = init, and $type = local: Otherwise
192: # the caller is insane:
193:
194: if(($init ne "init") && ($type ne "local")) {
195: &logthis('<font color = "red"> LocalConnection: caller is insane! '
196: ."init = $init, and type = $type </font>");
197: close($Socket);;
198: return undef;
199:
200: }
201: # Now get the key filename:
202:
203: my $IDEAKey = lonlocal::ReadKeyFile($name);
204: return $IDEAKey;
205: }
206: }
207: #------------------------------------------------------------------------------
208: #
209: # SSLConnection
210: # Completes the formation of an ssh authenticated connection. The
211: # socket is promoted to an ssl socket. If this promotion and the associated
212: # certificate exchange are successful, the IDEA key is generated and sent
213: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
214: # the caller after the SSL tunnel is torn down.
215: #
216: # Parameters:
217: # Name Type Purpose
218: # $Socket IO::Socket::INET Plaintext socket.
219: #
220: # Returns:
221: # IDEA key on success.
222: # undef on failure.
223: #
224: sub SSLConnection {
225: my $Socket = shift;
226:
227: Debug("SSLConnection: ");
228: my $KeyFile = lonssl::KeyFile();
229: if(!$KeyFile) {
230: my $err = lonssl::LastError();
231: &logthis("<font color=\"red\"> CRITICAL"
232: ."Can't get key file $err </font>");
233: return undef;
234: }
235: my ($CACertificate,
236: $Certificate) = lonssl::CertificateFile();
237:
238:
239: # If any of the key, certificate or certificate authority
240: # certificate filenames are not defined, this can't work.
241:
242: if((!$Certificate) || (!$CACertificate)) {
243: my $err = lonssl::LastError();
244: &logthis("<font color=\"red\"> CRITICAL"
245: ."Can't get certificates: $err </font>");
246:
247: return undef;
248: }
249: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
250:
251: # Indicate to our peer that we can procede with
252: # a transition to ssl authentication:
253:
254: print $Socket "ok:ssl\n";
255:
256: Debug("Approving promotion -> ssl");
257: # And do so:
258:
259: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
260: $CACertificate,
261: $Certificate,
262: $KeyFile);
263: if(! ($SSLSocket) ) { # SSL socket promotion failed.
264: my $err = lonssl::LastError();
265: &logthis("<font color=\"red\"> CRITICAL "
266: ."SSL Socket promotion failed: $err </font>");
267: return undef;
268: }
269: Debug("SSL Promotion successful");
270:
271: #
272: # The only thing we'll use the socket for is to send the IDEA key
273: # to the peer:
274:
275: my $Key = lonlocal::CreateCipherKey();
276: print $SSLSocket "$Key\n";
277:
278: lonssl::Close($SSLSocket);
279:
280: Debug("Key exchange complete: $Key");
281:
282: return $Key;
283: }
284: #
285: # InsecureConnection:
286: # If insecure connections are allowd,
287: # exchange a challenge with the client to 'validate' the
288: # client (not really, but that's the protocol):
289: # We produce a challenge string that's sent to the client.
290: # The client must then echo the challenge verbatim to us.
291: #
292: # Parameter:
293: # Socket - Socket open on the client.
294: # Returns:
295: # 1 - success.
296: # 0 - failure (e.g.mismatch or insecure not allowed).
297: #
298: sub InsecureConnection {
299: my $Socket = shift;
300:
301: # Don't even start if insecure connections are not allowed.
302:
303: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
304: return 0;
305: }
306:
307: # Fabricate a challenge string and send it..
308:
309: my $challenge = "$$".time; # pid + time.
310: print $Socket "$challenge\n";
311: &status("Waiting for challenge reply");
312:
313: my $answer = <$Socket>;
314: $answer =~s/\W//g;
315: if($challenge eq $answer) {
316: return 1;
317: } else {
318: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
319: &status("No challenge reqply");
320: return 0;
321: }
322:
323:
324: }
325: #
326: # Safely execute a command (as long as it's not a shel command and doesn
327: # not require/rely on shell escapes. The function operates by doing a
328: # a pipe based fork and capturing stdout and stderr from the pipe.
329: #
330: # Formal Parameters:
331: # $line - A line of text to be executed as a command.
332: # Returns:
333: # The output from that command. If the output is multiline the caller
334: # must know how to split up the output.
335: #
336: #
337: sub execute_command {
338: my ($line) = @_;
339: my @words = split(/\s/, $line); # Bust the command up into words.
340: my $output = "";
341:
342: my $pid = open(CHILD, "-|");
343:
344: if($pid) { # Parent process
345: Debug("In parent process for execute_command");
346: my @data = <CHILD>; # Read the child's outupt...
347: close CHILD;
348: foreach my $output_line (@data) {
349: Debug("Adding $output_line");
350: $output .= $output_line; # Presumably has a \n on it.
351: }
352:
353: } else { # Child process
354: close (STDERR);
355: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
356: exec(@words); # won't return.
357: }
358: return $output;
359: }
360:
361:
362: # GetCertificate: Given a transaction that requires a certificate,
363: # this function will extract the certificate from the transaction
364: # request. Note that at this point, the only concept of a certificate
365: # is the hostname to which we are connected.
366: #
367: # Parameter:
368: # request - The request sent by our client (this parameterization may
369: # need to change when we really use a certificate granting
370: # authority.
371: #
372: sub GetCertificate {
373: my $request = shift;
374:
375: return $clientip;
376: }
377:
378: #
379: # Return true if client is a manager.
380: #
381: sub isManager {
382: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
383: }
384: #
385: # Return tru if client can do client functions
386: #
387: sub isClient {
388: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
389: }
390:
391:
392: #
393: # ReadManagerTable: Reads in the current manager table. For now this is
394: # done on each manager authentication because:
395: # - These authentications are not frequent
396: # - This allows dynamic changes to the manager table
397: # without the need to signal to the lond.
398: #
399: sub ReadManagerTable {
400:
401: # Clean out the old table first..
402:
403: foreach my $key (keys %managers) {
404: delete $managers{$key};
405: }
406:
407: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
408: if (!open (MANAGERS, $tablename)) {
409: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
410: return;
411: }
412: while(my $host = <MANAGERS>) {
413: chomp($host);
414: if ($host =~ "^#") { # Comment line.
415: next;
416: }
417: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
418: # The entry is of the form:
419: # cluname:hostname
420: # cluname - A 'cluster hostname' is needed in order to negotiate
421: # the host key.
422: # hostname- The dns name of the host.
423: #
424: my($cluname, $dnsname) = split(/:/, $host);
425:
426: my $ip = gethostbyname($dnsname);
427: if(defined($ip)) { # bad names don't deserve entry.
428: my $hostip = inet_ntoa($ip);
429: $managers{$hostip} = $cluname;
430: logthis('<font color="green"> registering manager '.
431: "$dnsname as $cluname with $hostip </font>\n");
432: }
433: } else {
434: logthis('<font color="green"> existing host'." $host</font>\n");
435: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if clumemeber
436: }
437: }
438: }
439:
440: #
441: # ValidManager: Determines if a given certificate represents a valid manager.
442: # in this primitive implementation, the 'certificate' is
443: # just the connecting loncapa client name. This is checked
444: # against a valid client list in the configuration.
445: #
446: #
447: sub ValidManager {
448: my $certificate = shift;
449:
450: return isManager;
451: }
452: #
453: # CopyFile: Called as part of the process of installing a
454: # new configuration file. This function copies an existing
455: # file to a backup file.
456: # Parameters:
457: # oldfile - Name of the file to backup.
458: # newfile - Name of the backup file.
459: # Return:
460: # 0 - Failure (errno has failure reason).
461: # 1 - Success.
462: #
463: sub CopyFile {
464:
465: my ($oldfile, $newfile) = @_;
466:
467: if (! copy($oldfile,$newfile)) {
468: return 0;
469: }
470: chmod(0660, $newfile);
471: return 1;
472: }
473: #
474: # Host files are passed out with externally visible host IPs.
475: # If, for example, we are behind a fire-wall or NAT host, our
476: # internally visible IP may be different than the externally
477: # visible IP. Therefore, we always adjust the contents of the
478: # host file so that the entry for ME is the IP that we believe
479: # we have. At present, this is defined as the entry that
480: # DNS has for us. If by some chance we are not able to get a
481: # DNS translation for us, then we assume that the host.tab file
482: # is correct.
483: # BUGBUGBUG - in the future, we really should see if we can
484: # easily query the interface(s) instead.
485: # Parameter(s):
486: # contents - The contents of the host.tab to check.
487: # Returns:
488: # newcontents - The adjusted contents.
489: #
490: #
491: sub AdjustHostContents {
492: my $contents = shift;
493: my $adjusted;
494: my $me = $perlvar{'lonHostID'};
495:
496: foreach my $line (split(/\n/,$contents)) {
497: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
498: chomp($line);
499: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
500: if ($id eq $me) {
501: my $ip = gethostbyname($name);
502: my $ipnew = inet_ntoa($ip);
503: $ip = $ipnew;
504: # Reconstruct the host line and append to adjusted:
505:
506: my $newline = "$id:$domain:$role:$name:$ip";
507: if($maxcon ne "") { # Not all hosts have loncnew tuning params
508: $newline .= ":$maxcon:$idleto:$mincon";
509: }
510: $adjusted .= $newline."\n";
511:
512: } else { # Not me, pass unmodified.
513: $adjusted .= $line."\n";
514: }
515: } else { # Blank or comment never re-written.
516: $adjusted .= $line."\n"; # Pass blanks and comments as is.
517: }
518: }
519: return $adjusted;
520: }
521: #
522: # InstallFile: Called to install an administrative file:
523: # - The file is created with <name>.tmp
524: # - The <name>.tmp file is then mv'd to <name>
525: # This lugubrious procedure is done to ensure that we are never without
526: # a valid, even if dated, version of the file regardless of who crashes
527: # and when the crash occurs.
528: #
529: # Parameters:
530: # Name of the file
531: # File Contents.
532: # Return:
533: # nonzero - success.
534: # 0 - failure and $! has an errno.
535: #
536: sub InstallFile {
537:
538: my ($Filename, $Contents) = @_;
539: my $TempFile = $Filename.".tmp";
540:
541: # Open the file for write:
542:
543: my $fh = IO::File->new("> $TempFile"); # Write to temp.
544: if(!(defined $fh)) {
545: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
546: return 0;
547: }
548: # write the contents of the file:
549:
550: print $fh ($Contents);
551: $fh->close; # In case we ever have a filesystem w. locking
552:
553: chmod(0660, $TempFile);
554:
555: # Now we can move install the file in position.
556:
557: move($TempFile, $Filename);
558:
559: return 1;
560: }
561:
562:
563: #
564: # ConfigFileFromSelector: converts a configuration file selector
565: # (one of host or domain at this point) into a
566: # configuration file pathname.
567: #
568: # Parameters:
569: # selector - Configuration file selector.
570: # Returns:
571: # Full path to the file or undef if the selector is invalid.
572: #
573: sub ConfigFileFromSelector {
574: my $selector = shift;
575: my $tablefile;
576:
577: my $tabledir = $perlvar{'lonTabDir'}.'/';
578: if ($selector eq "hosts") {
579: $tablefile = $tabledir."hosts.tab";
580: } elsif ($selector eq "domain") {
581: $tablefile = $tabledir."domain.tab";
582: } else {
583: return undef;
584: }
585: return $tablefile;
586:
587: }
588: #
589: # PushFile: Called to do an administrative push of a file.
590: # - Ensure the file being pushed is one we support.
591: # - Backup the old file to <filename.saved>
592: # - Separate the contents of the new file out from the
593: # rest of the request.
594: # - Write the new file.
595: # Parameter:
596: # Request - The entire user request. This consists of a : separated
597: # string pushfile:tablename:contents.
598: # NOTE: The contents may have :'s in it as well making things a bit
599: # more interesting... but not much.
600: # Returns:
601: # String to send to client ("ok" or "refused" if bad file).
602: #
603: sub PushFile {
604: my $request = shift;
605: my ($command, $filename, $contents) = split(":", $request, 3);
606:
607: # At this point in time, pushes for only the following tables are
608: # supported:
609: # hosts.tab ($filename eq host).
610: # domain.tab ($filename eq domain).
611: # Construct the destination filename or reject the request.
612: #
613: # lonManage is supposed to ensure this, however this session could be
614: # part of some elaborate spoof that managed somehow to authenticate.
615: #
616:
617:
618: my $tablefile = ConfigFileFromSelector($filename);
619: if(! (defined $tablefile)) {
620: return "refused";
621: }
622: #
623: # >copy< the old table to the backup table
624: # don't rename in case system crashes/reboots etc. in the time
625: # window between a rename and write.
626: #
627: my $backupfile = $tablefile;
628: $backupfile =~ s/\.tab$/.old/;
629: if(!CopyFile($tablefile, $backupfile)) {
630: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
631: return "error:$!";
632: }
633: &logthis('<font color="green"> Pushfile: backed up '
634: .$tablefile." to $backupfile</font>");
635:
636: # If the file being pushed is the host file, we adjust the entry for ourself so that the
637: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
638: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
639: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
640: # that possibilty.
641:
642: if($filename eq "host") {
643: $contents = AdjustHostContents($contents);
644: }
645:
646: # Install the new file:
647:
648: if(!InstallFile($tablefile, $contents)) {
649: &logthis('<font color="red"> Pushfile: unable to install '
650: .$tablefile." $! </font>");
651: return "error:$!";
652: } else {
653: &logthis('<font color="green"> Installed new '.$tablefile
654: ."</font>");
655:
656: }
657:
658:
659: # Indicate success:
660:
661: return "ok";
662:
663: }
664:
665: #
666: # Called to re-init either lonc or lond.
667: #
668: # Parameters:
669: # request - The full request by the client. This is of the form
670: # reinit:<process>
671: # where <process> is allowed to be either of
672: # lonc or lond
673: #
674: # Returns:
675: # The string to be sent back to the client either:
676: # ok - Everything worked just fine.
677: # error:why - There was a failure and why describes the reason.
678: #
679: #
680: sub ReinitProcess {
681: my $request = shift;
682:
683:
684: # separate the request (reinit) from the process identifier and
685: # validate it producing the name of the .pid file for the process.
686: #
687: #
688: my ($junk, $process) = split(":", $request);
689: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
690: if($process eq 'lonc') {
691: $processpidfile = $processpidfile."lonc.pid";
692: if (!open(PIDFILE, "< $processpidfile")) {
693: return "error:Open failed for $processpidfile";
694: }
695: my $loncpid = <PIDFILE>;
696: close(PIDFILE);
697: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
698: ."</font>");
699: kill("USR2", $loncpid);
700: } elsif ($process eq 'lond') {
701: logthis('<font color="red"> Reinitializing self (lond) </font>');
702: &UpdateHosts; # Lond is us!!
703: } else {
704: &logthis('<font color="yellow" Invalid reinit request for '.$process
705: ."</font>");
706: return "error:Invalid process identifier $process";
707: }
708: return 'ok';
709: }
710: # Validate a line in a configuration file edit script:
711: # Validation includes:
712: # - Ensuring the command is valid.
713: # - Ensuring the command has sufficient parameters
714: # Parameters:
715: # scriptline - A line to validate (\n has been stripped for what it's worth).
716: #
717: # Return:
718: # 0 - Invalid scriptline.
719: # 1 - Valid scriptline
720: # NOTE:
721: # Only the command syntax is checked, not the executability of the
722: # command.
723: #
724: sub isValidEditCommand {
725: my $scriptline = shift;
726:
727: # Line elements are pipe separated:
728:
729: my ($command, $key, $newline) = split(/\|/, $scriptline);
730: &logthis('<font color="green"> isValideditCommand checking: '.
731: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
732:
733: if ($command eq "delete") {
734: #
735: # key with no newline.
736: #
737: if( ($key eq "") || ($newline ne "")) {
738: return 0; # Must have key but no newline.
739: } else {
740: return 1; # Valid syntax.
741: }
742: } elsif ($command eq "replace") {
743: #
744: # key and newline:
745: #
746: if (($key eq "") || ($newline eq "")) {
747: return 0;
748: } else {
749: return 1;
750: }
751: } elsif ($command eq "append") {
752: if (($key ne "") && ($newline eq "")) {
753: return 1;
754: } else {
755: return 0;
756: }
757: } else {
758: return 0; # Invalid command.
759: }
760: return 0; # Should not get here!!!
761: }
762: #
763: # ApplyEdit - Applies an edit command to a line in a configuration
764: # file. It is the caller's responsiblity to validate the
765: # edit line.
766: # Parameters:
767: # $directive - A single edit directive to apply.
768: # Edit directives are of the form:
769: # append|newline - Appends a new line to the file.
770: # replace|key|newline - Replaces the line with key value 'key'
771: # delete|key - Deletes the line with key value 'key'.
772: # $editor - A config file editor object that contains the
773: # file being edited.
774: #
775: sub ApplyEdit {
776:
777: my ($directive, $editor) = @_;
778:
779: # Break the directive down into its command and its parameters
780: # (at most two at this point. The meaning of the parameters, if in fact
781: # they exist depends on the command).
782:
783: my ($command, $p1, $p2) = split(/\|/, $directive);
784:
785: if($command eq "append") {
786: $editor->Append($p1); # p1 - key p2 null.
787: } elsif ($command eq "replace") {
788: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
789: } elsif ($command eq "delete") {
790: $editor->DeleteLine($p1); # p1 - key p2 null.
791: } else { # Should not get here!!!
792: die "Invalid command given to ApplyEdit $command"
793: }
794: }
795: #
796: # AdjustOurHost:
797: # Adjusts a host file stored in a configuration file editor object
798: # for the true IP address of this host. This is necessary for hosts
799: # that live behind a firewall.
800: # Those hosts have a publicly distributed IP of the firewall, but
801: # internally must use their actual IP. We assume that a given
802: # host only has a single IP interface for now.
803: # Formal Parameters:
804: # editor - The configuration file editor to adjust. This
805: # editor is assumed to contain a hosts.tab file.
806: # Strategy:
807: # - Figure out our hostname.
808: # - Lookup the entry for this host.
809: # - Modify the line to contain our IP
810: # - Do a replace for this host.
811: sub AdjustOurHost {
812: my $editor = shift;
813:
814: # figure out who I am.
815:
816: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
817:
818: # Get my host file entry.
819:
820: my $ConfigLine = $editor->Find($myHostName);
821: if(! (defined $ConfigLine)) {
822: die "AdjustOurHost - no entry for me in hosts file $myHostName";
823: }
824: # figure out my IP:
825: # Use the config line to get my hostname.
826: # Use gethostbyname to translate that into an IP address.
827: #
828: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
829: #
830: # Reassemble the config line from the elements in the list.
831: # Note that if the loncnew items were not present before, they will
832: # be now even if they would be empty
833: #
834: my $newConfigLine = $id;
835: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
836: $newConfigLine .= ":".$item;
837: }
838: # Replace the line:
839:
840: $editor->ReplaceLine($id, $newConfigLine);
841:
842: }
843: #
844: # ReplaceConfigFile:
845: # Replaces a configuration file with the contents of a
846: # configuration file editor object.
847: # This is done by:
848: # - Copying the target file to <filename>.old
849: # - Writing the new file to <filename>.tmp
850: # - Moving <filename.tmp> -> <filename>
851: # This laborious process ensures that the system is never without
852: # a configuration file that's at least valid (even if the contents
853: # may be dated).
854: # Parameters:
855: # filename - Name of the file to modify... this is a full path.
856: # editor - Editor containing the file.
857: #
858: sub ReplaceConfigFile {
859:
860: my ($filename, $editor) = @_;
861:
862: CopyFile ($filename, $filename.".old");
863:
864: my $contents = $editor->Get(); # Get the contents of the file.
865:
866: InstallFile($filename, $contents);
867: }
868: #
869: #
870: # Called to edit a configuration table file
871: # Parameters:
872: # request - The entire command/request sent by lonc or lonManage
873: # Return:
874: # The reply to send to the client.
875: #
876: sub EditFile {
877: my $request = shift;
878:
879: # Split the command into it's pieces: edit:filetype:script
880:
881: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
882:
883: # Check the pre-coditions for success:
884:
885: if($cmd != "edit") { # Something is amiss afoot alack.
886: return "error:edit request detected, but request != 'edit'\n";
887: }
888: if( ($filetype ne "hosts") &&
889: ($filetype ne "domain")) {
890: return "error:edit requested with invalid file specifier: $filetype \n";
891: }
892:
893: # Split the edit script and check it's validity.
894:
895: my @scriptlines = split(/\n/, $script); # one line per element.
896: my $linecount = scalar(@scriptlines);
897: for(my $i = 0; $i < $linecount; $i++) {
898: chomp($scriptlines[$i]);
899: if(!isValidEditCommand($scriptlines[$i])) {
900: return "error:edit with bad script line: '$scriptlines[$i]' \n";
901: }
902: }
903:
904: # Execute the edit operation.
905: # - Create a config file editor for the appropriate file and
906: # - execute each command in the script:
907: #
908: my $configfile = ConfigFileFromSelector($filetype);
909: if (!(defined $configfile)) {
910: return "refused\n";
911: }
912: my $editor = ConfigFileEdit->new($configfile);
913:
914: for (my $i = 0; $i < $linecount; $i++) {
915: ApplyEdit($scriptlines[$i], $editor);
916: }
917: # If the file is the host file, ensure that our host is
918: # adjusted to have our ip:
919: #
920: if($filetype eq "host") {
921: AdjustOurHost($editor);
922: }
923: # Finally replace the current file with our file.
924: #
925: ReplaceConfigFile($configfile, $editor);
926:
927: return "ok\n";
928: }
929:
930: # read_profile
931: #
932: # Returns a set of specific entries from a user's profile file.
933: # this is a utility function that is used by both get_profile_entry and
934: # get_profile_entry_encrypted.
935: #
936: # Parameters:
937: # udom - Domain in which the user exists.
938: # uname - User's account name (loncapa account)
939: # namespace - The profile namespace to open.
940: # what - A set of & separated queries.
941: # Returns:
942: # If all ok: - The string that needs to be shipped back to the user.
943: # If failure - A string that starts with error: followed by the failure
944: # reason.. note that this probabyl gets shipped back to the
945: # user as well.
946: #
947: sub read_profile {
948: my ($udom, $uname, $namespace, $what) = @_;
949:
950: my $hashref = &tie_user_hash($udom, $uname, $namespace,
951: &GDBM_READER());
952: if ($hashref) {
953: my @queries=split(/\&/,$what);
954: my $qresult='';
955:
956: for (my $i=0;$i<=$#queries;$i++) {
957: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
958: }
959: $qresult=~s/\&$//; # Remove trailing & from last lookup.
960: if (&untie_user_hash($hashref)) {
961: return $qresult;
962: } else {
963: return "error: ".($!+0)." untie (GDBM) Failed";
964: }
965: } else {
966: if ($!+0 == 2) {
967: return "error:No such file or GDBM reported bad block error";
968: } else {
969: return "error: ".($!+0)." tie (GDBM) Failed";
970: }
971: }
972:
973: }
974: #--------------------- Request Handlers --------------------------------------------
975: #
976: # By convention each request handler registers itself prior to the sub
977: # declaration:
978: #
979:
980: #++
981: #
982: # Handles ping requests.
983: # Parameters:
984: # $cmd - the actual keyword that invoked us.
985: # $tail - the tail of the request that invoked us.
986: # $replyfd- File descriptor connected to the client
987: # Implicit Inputs:
988: # $currenthostid - Global variable that carries the name of the host we are
989: # known as.
990: # Returns:
991: # 1 - Ok to continue processing.
992: # 0 - Program should exit.
993: # Side effects:
994: # Reply information is sent to the client.
995: sub ping_handler {
996: my ($cmd, $tail, $client) = @_;
997: Debug("$cmd $tail $client .. $currenthostid:");
998:
999: Reply( $client,\$currenthostid,"$cmd:$tail");
1000:
1001: return 1;
1002: }
1003: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1004:
1005: #++
1006: #
1007: # Handles pong requests. Pong replies with our current host id, and
1008: # the results of a ping sent to us via our lonc.
1009: #
1010: # Parameters:
1011: # $cmd - the actual keyword that invoked us.
1012: # $tail - the tail of the request that invoked us.
1013: # $replyfd- File descriptor connected to the client
1014: # Implicit Inputs:
1015: # $currenthostid - Global variable that carries the name of the host we are
1016: # connected to.
1017: # Returns:
1018: # 1 - Ok to continue processing.
1019: # 0 - Program should exit.
1020: # Side effects:
1021: # Reply information is sent to the client.
1022: sub pong_handler {
1023: my ($cmd, $tail, $replyfd) = @_;
1024:
1025: my $reply=&Apache::lonnet::reply("ping",$clientname);
1026: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1027: return 1;
1028: }
1029: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1030:
1031: #++
1032: # Called to establish an encrypted session key with the remote client.
1033: # Note that with secure lond, in most cases this function is never
1034: # invoked. Instead, the secure session key is established either
1035: # via a local file that's locked down tight and only lives for a short
1036: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1037: # bits from /dev/urandom, rather than the predictable pattern used by
1038: # by this sub. This sub is only used in the old-style insecure
1039: # key negotiation.
1040: # Parameters:
1041: # $cmd - the actual keyword that invoked us.
1042: # $tail - the tail of the request that invoked us.
1043: # $replyfd- File descriptor connected to the client
1044: # Implicit Inputs:
1045: # $currenthostid - Global variable that carries the name of the host
1046: # known as.
1047: # $clientname - Global variable that carries the name of the hsot we're connected to.
1048: # Returns:
1049: # 1 - Ok to continue processing.
1050: # 0 - Program should exit.
1051: # Implicit Outputs:
1052: # Reply information is sent to the client.
1053: # $cipher is set with a reference to a new IDEA encryption object.
1054: #
1055: sub establish_key_handler {
1056: my ($cmd, $tail, $replyfd) = @_;
1057:
1058: my $buildkey=time.$$.int(rand 100000);
1059: $buildkey=~tr/1-6/A-F/;
1060: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1061: my $key=$currenthostid.$clientname;
1062: $key=~tr/a-z/A-Z/;
1063: $key=~tr/G-P/0-9/;
1064: $key=~tr/Q-Z/0-9/;
1065: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1066: $key=substr($key,0,32);
1067: my $cipherkey=pack("H32",$key);
1068: $cipher=new IDEA $cipherkey;
1069: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1070:
1071: return 1;
1072:
1073: }
1074: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1075:
1076: # Handler for the load command. Returns the current system load average
1077: # to the requestor.
1078: #
1079: # Parameters:
1080: # $cmd - the actual keyword that invoked us.
1081: # $tail - the tail of the request that invoked us.
1082: # $replyfd- File descriptor connected to the client
1083: # Implicit Inputs:
1084: # $currenthostid - Global variable that carries the name of the host
1085: # known as.
1086: # $clientname - Global variable that carries the name of the hsot we're connected to.
1087: # Returns:
1088: # 1 - Ok to continue processing.
1089: # 0 - Program should exit.
1090: # Side effects:
1091: # Reply information is sent to the client.
1092: sub load_handler {
1093: my ($cmd, $tail, $replyfd) = @_;
1094:
1095: # Get the load average from /proc/loadavg and calculate it as a percentage of
1096: # the allowed load limit as set by the perl global variable lonLoadLim
1097:
1098: my $loadavg;
1099: my $loadfile=IO::File->new('/proc/loadavg');
1100:
1101: $loadavg=<$loadfile>;
1102: $loadavg =~ s/\s.*//g; # Extract the first field only.
1103:
1104: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1105:
1106: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1107:
1108: return 1;
1109: }
1110: ®ister_handler("load", \&load_handler, 0, 1, 0);
1111:
1112: #
1113: # Process the userload request. This sub returns to the client the current
1114: # user load average. It can be invoked either by clients or managers.
1115: #
1116: # Parameters:
1117: # $cmd - the actual keyword that invoked us.
1118: # $tail - the tail of the request that invoked us.
1119: # $replyfd- File descriptor connected to the client
1120: # Implicit Inputs:
1121: # $currenthostid - Global variable that carries the name of the host
1122: # known as.
1123: # $clientname - Global variable that carries the name of the hsot we're connected to.
1124: # Returns:
1125: # 1 - Ok to continue processing.
1126: # 0 - Program should exit
1127: # Implicit inputs:
1128: # whatever the userload() function requires.
1129: # Implicit outputs:
1130: # the reply is written to the client.
1131: #
1132: sub user_load_handler {
1133: my ($cmd, $tail, $replyfd) = @_;
1134:
1135: my $userloadpercent=&Apache::lonnet::userload();
1136: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1137:
1138: return 1;
1139: }
1140: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1141:
1142: # Process a request for the authorization type of a user:
1143: # (userauth).
1144: #
1145: # Parameters:
1146: # $cmd - the actual keyword that invoked us.
1147: # $tail - the tail of the request that invoked us.
1148: # $replyfd- File descriptor connected to the client
1149: # Returns:
1150: # 1 - Ok to continue processing.
1151: # 0 - Program should exit
1152: # Implicit outputs:
1153: # The user authorization type is written to the client.
1154: #
1155: sub user_authorization_type {
1156: my ($cmd, $tail, $replyfd) = @_;
1157:
1158: my $userinput = "$cmd:$tail";
1159:
1160: # Pull the domain and username out of the command tail.
1161: # and call get_auth_type to determine the authentication type.
1162:
1163: my ($udom,$uname)=split(/:/,$tail);
1164: my $result = &get_auth_type($udom, $uname);
1165: if($result eq "nouser") {
1166: &Failure( $replyfd, "unknown_user\n", $userinput);
1167: } else {
1168: #
1169: # We only want to pass the second field from get_auth_type
1170: # for ^krb.. otherwise we'll be handing out the encrypted
1171: # password for internals e.g.
1172: #
1173: my ($type,$otherinfo) = split(/:/,$result);
1174: if($type =~ /^krb/) {
1175: $type = $result;
1176: } else {
1177: $type .= ':';
1178: }
1179: &Reply( $replyfd, \$type, $userinput);
1180: }
1181:
1182: return 1;
1183: }
1184: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1185:
1186: # Process a request by a manager to push a hosts or domain table
1187: # to us. We pick apart the command and pass it on to the subs
1188: # that already exist to do this.
1189: #
1190: # Parameters:
1191: # $cmd - the actual keyword that invoked us.
1192: # $tail - the tail of the request that invoked us.
1193: # $client - File descriptor connected to the client
1194: # Returns:
1195: # 1 - Ok to continue processing.
1196: # 0 - Program should exit
1197: # Implicit Output:
1198: # a reply is written to the client.
1199: sub push_file_handler {
1200: my ($cmd, $tail, $client) = @_;
1201:
1202: my $userinput = "$cmd:$tail";
1203:
1204: # At this time we only know that the IP of our partner is a valid manager
1205: # the code below is a hook to do further authentication (e.g. to resolve
1206: # spoofing).
1207:
1208: my $cert = &GetCertificate($userinput);
1209: if(&ValidManager($cert)) {
1210:
1211: # Now presumably we have the bona fides of both the peer host and the
1212: # process making the request.
1213:
1214: my $reply = &PushFile($userinput);
1215: &Reply($client, \$reply, $userinput);
1216:
1217: } else {
1218: &Failure( $client, "refused\n", $userinput);
1219: }
1220: return 1;
1221: }
1222: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1223:
1224: #
1225: # du - list the disk usuage of a directory recursively.
1226: #
1227: # note: stolen code from the ls file handler
1228: # under construction by Rick Banghart
1229: # .
1230: # Parameters:
1231: # $cmd - The command that dispatched us (du).
1232: # $ududir - The directory path to list... I'm not sure what this
1233: # is relative as things like ls:. return e.g.
1234: # no_such_dir.
1235: # $client - Socket open on the client.
1236: # Returns:
1237: # 1 - indicating that the daemon should not disconnect.
1238: # Side Effects:
1239: # The reply is written to $client.
1240: #
1241: sub du_handler {
1242: my ($cmd, $ududir, $client) = @_;
1243: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1244: my $userinput = "$cmd:$ududir";
1245:
1246: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1247: &Failure($client,"refused\n","$cmd:$ududir");
1248: return 1;
1249: }
1250: # Since $ududir could have some nasties in it,
1251: # we will require that ududir is a valid
1252: # directory. Just in case someone tries to
1253: # slip us a line like .;(cd /home/httpd rm -rf*)
1254: # etc.
1255: #
1256: if (-d $ududir) {
1257: my $total_size=0;
1258: my $code=sub {
1259: if ($_=~/\.\d+\./) { return;}
1260: if ($_=~/\.meta$/) { return;}
1261: if (-d $_) { return;}
1262: $total_size+=(stat($_))[7];
1263: };
1264: chdir($ududir);
1265: find($code,$ududir);
1266: $total_size=int($total_size/1024);
1267: &Reply($client,\$total_size,"$cmd:$ududir");
1268: } else {
1269: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1270: }
1271: return 1;
1272: }
1273: ®ister_handler("du", \&du_handler, 0, 1, 0);
1274:
1275: #
1276: # The ls_handler routine should be considered obosolete and is retained
1277: # for communication with legacy servers. Please see the ls2_handler.
1278: #
1279: # ls - list the contents of a directory. For each file in the
1280: # selected directory the filename followed by the full output of
1281: # the stat function is returned. The returned info for each
1282: # file are separated by ':'. The stat fields are separated by &'s.
1283: # Parameters:
1284: # $cmd - The command that dispatched us (ls).
1285: # $ulsdir - The directory path to list... I'm not sure what this
1286: # is relative as things like ls:. return e.g.
1287: # no_such_dir.
1288: # $client - Socket open on the client.
1289: # Returns:
1290: # 1 - indicating that the daemon should not disconnect.
1291: # Side Effects:
1292: # The reply is written to $client.
1293: #
1294: sub ls_handler {
1295: # obsoleted by ls2_handler
1296: my ($cmd, $ulsdir, $client) = @_;
1297:
1298: my $userinput = "$cmd:$ulsdir";
1299:
1300: my $obs;
1301: my $rights;
1302: my $ulsout='';
1303: my $ulsfn;
1304: if (-e $ulsdir) {
1305: if(-d $ulsdir) {
1306: if (opendir(LSDIR,$ulsdir)) {
1307: while ($ulsfn=readdir(LSDIR)) {
1308: undef($obs);
1309: undef($rights);
1310: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1311: #We do some obsolete checking here
1312: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1313: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1314: my @obsolete=<FILE>;
1315: foreach my $obsolete (@obsolete) {
1316: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1317: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1318: }
1319: }
1320: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1321: if($obs eq '1') { $ulsout.="&1"; }
1322: else { $ulsout.="&0"; }
1323: if($rights eq '1') { $ulsout.="&1:"; }
1324: else { $ulsout.="&0:"; }
1325: }
1326: closedir(LSDIR);
1327: }
1328: } else {
1329: my @ulsstats=stat($ulsdir);
1330: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1331: }
1332: } else {
1333: $ulsout='no_such_dir';
1334: }
1335: if ($ulsout eq '') { $ulsout='empty'; }
1336: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1337:
1338: return 1;
1339:
1340: }
1341: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1342:
1343: #
1344: # Please also see the ls_handler, which this routine obosolets.
1345: # ls2_handler differs from ls_handler in that it escapes its return
1346: # values before concatenating them together with ':'s.
1347: #
1348: # ls2 - list the contents of a directory. For each file in the
1349: # selected directory the filename followed by the full output of
1350: # the stat function is returned. The returned info for each
1351: # file are separated by ':'. The stat fields are separated by &'s.
1352: # Parameters:
1353: # $cmd - The command that dispatched us (ls).
1354: # $ulsdir - The directory path to list... I'm not sure what this
1355: # is relative as things like ls:. return e.g.
1356: # no_such_dir.
1357: # $client - Socket open on the client.
1358: # Returns:
1359: # 1 - indicating that the daemon should not disconnect.
1360: # Side Effects:
1361: # The reply is written to $client.
1362: #
1363: sub ls2_handler {
1364: my ($cmd, $ulsdir, $client) = @_;
1365:
1366: my $userinput = "$cmd:$ulsdir";
1367:
1368: my $obs;
1369: my $rights;
1370: my $ulsout='';
1371: my $ulsfn;
1372: if (-e $ulsdir) {
1373: if(-d $ulsdir) {
1374: if (opendir(LSDIR,$ulsdir)) {
1375: while ($ulsfn=readdir(LSDIR)) {
1376: undef($obs);
1377: undef($rights);
1378: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1379: #We do some obsolete checking here
1380: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1381: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1382: my @obsolete=<FILE>;
1383: foreach my $obsolete (@obsolete) {
1384: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1385: if($obsolete =~ m|(<copyright>)(default)|) {
1386: $rights = 1;
1387: }
1388: }
1389: }
1390: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1391: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1392: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1393: $ulsout.= &escape($tmp).':';
1394: }
1395: closedir(LSDIR);
1396: }
1397: } else {
1398: my @ulsstats=stat($ulsdir);
1399: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1400: }
1401: } else {
1402: $ulsout='no_such_dir';
1403: }
1404: if ($ulsout eq '') { $ulsout='empty'; }
1405: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1406: return 1;
1407: }
1408: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1409:
1410: # Process a reinit request. Reinit requests that either
1411: # lonc or lond be reinitialized so that an updated
1412: # host.tab or domain.tab can be processed.
1413: #
1414: # Parameters:
1415: # $cmd - the actual keyword that invoked us.
1416: # $tail - the tail of the request that invoked us.
1417: # $client - File descriptor connected to the client
1418: # Returns:
1419: # 1 - Ok to continue processing.
1420: # 0 - Program should exit
1421: # Implicit output:
1422: # a reply is sent to the client.
1423: #
1424: sub reinit_process_handler {
1425: my ($cmd, $tail, $client) = @_;
1426:
1427: my $userinput = "$cmd:$tail";
1428:
1429: my $cert = &GetCertificate($userinput);
1430: if(&ValidManager($cert)) {
1431: chomp($userinput);
1432: my $reply = &ReinitProcess($userinput);
1433: &Reply( $client, \$reply, $userinput);
1434: } else {
1435: &Failure( $client, "refused\n", $userinput);
1436: }
1437: return 1;
1438: }
1439: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1440:
1441: # Process the editing script for a table edit operation.
1442: # the editing operation must be encrypted and requested by
1443: # a manager host.
1444: #
1445: # Parameters:
1446: # $cmd - the actual keyword that invoked us.
1447: # $tail - the tail of the request that invoked us.
1448: # $client - File descriptor connected to the client
1449: # Returns:
1450: # 1 - Ok to continue processing.
1451: # 0 - Program should exit
1452: # Implicit output:
1453: # a reply is sent to the client.
1454: #
1455: sub edit_table_handler {
1456: my ($command, $tail, $client) = @_;
1457:
1458: my $userinput = "$command:$tail";
1459:
1460: my $cert = &GetCertificate($userinput);
1461: if(&ValidManager($cert)) {
1462: my($filetype, $script) = split(/:/, $tail);
1463: if (($filetype eq "hosts") ||
1464: ($filetype eq "domain")) {
1465: if($script ne "") {
1466: &Reply($client, # BUGBUG - EditFile
1467: &EditFile($userinput), # could fail.
1468: $userinput);
1469: } else {
1470: &Failure($client,"refused\n",$userinput);
1471: }
1472: } else {
1473: &Failure($client,"refused\n",$userinput);
1474: }
1475: } else {
1476: &Failure($client,"refused\n",$userinput);
1477: }
1478: return 1;
1479: }
1480: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1481:
1482: #
1483: # Authenticate a user against the LonCAPA authentication
1484: # database. Note that there are several authentication
1485: # possibilities:
1486: # - unix - The user can be authenticated against the unix
1487: # password file.
1488: # - internal - The user can be authenticated against a purely
1489: # internal per user password file.
1490: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1491: # ticket granting authority.
1492: # - user - The person tailoring LonCAPA can supply a user authentication
1493: # mechanism that is per system.
1494: #
1495: # Parameters:
1496: # $cmd - The command that got us here.
1497: # $tail - Tail of the command (remaining parameters).
1498: # $client - File descriptor connected to client.
1499: # Returns
1500: # 0 - Requested to exit, caller should shut down.
1501: # 1 - Continue processing.
1502: # Implicit inputs:
1503: # The authentication systems describe above have their own forms of implicit
1504: # input into the authentication process that are described above.
1505: #
1506: sub authenticate_handler {
1507: my ($cmd, $tail, $client) = @_;
1508:
1509:
1510: # Regenerate the full input line
1511:
1512: my $userinput = $cmd.":".$tail;
1513:
1514: # udom - User's domain.
1515: # uname - Username.
1516: # upass - User's password.
1517: # defauthtype - Default authentication types for the domain
1518: # defautharg - Default authentication arg for the domain
1519:
1520: my ($udom,$uname,$upass,$defauthtype,$defautharg)=split(/:/,$tail);
1521: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1522: chomp($upass);
1523: $upass=&unescape($upass);
1524:
1525: my $pwdcorrect = &validate_user($udom,$uname,$upass,$defauthtype,
1526: $defautharg);
1527: if($pwdcorrect) {
1528: &Reply( $client, "authorized\n", $userinput);
1529: #
1530: # Bad credentials: Failed to authorize
1531: #
1532: } else {
1533: &Failure( $client, "non_authorized\n", $userinput);
1534: }
1535:
1536: return 1;
1537: }
1538: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1539:
1540: #
1541: # Change a user's password. Note that this function is complicated by
1542: # the fact that a user may be authenticated in more than one way:
1543: # At present, we are not able to change the password for all types of
1544: # authentication methods. Only for:
1545: # unix - unix password or shadow passoword style authentication.
1546: # local - Locally written authentication mechanism.
1547: # For now, kerb4 and kerb5 password changes are not supported and result
1548: # in an error.
1549: # FUTURE WORK:
1550: # Support kerberos passwd changes?
1551: # Parameters:
1552: # $cmd - The command that got us here.
1553: # $tail - Tail of the command (remaining parameters).
1554: # $client - File descriptor connected to client.
1555: # Returns
1556: # 0 - Requested to exit, caller should shut down.
1557: # 1 - Continue processing.
1558: # Implicit inputs:
1559: # The authentication systems describe above have their own forms of implicit
1560: # input into the authentication process that are described above.
1561: sub change_password_handler {
1562: my ($cmd, $tail, $client) = @_;
1563:
1564: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1565:
1566: #
1567: # udom - user's domain.
1568: # uname - Username.
1569: # upass - Current password.
1570: # npass - New password.
1571: # context - Context in which this was called
1572: # (preferences or reset_by_email).
1573:
1574: my ($udom,$uname,$upass,$npass,$context)=split(/:/,$tail);
1575:
1576: $upass=&unescape($upass);
1577: $npass=&unescape($npass);
1578: &Debug("Trying to change password for $uname");
1579:
1580: # First require that the user can be authenticated with their
1581: # old password unless context was 'reset_by_email':
1582:
1583: my $validated;
1584: if ($context eq 'reset_by_email') {
1585: $validated = 1;
1586: } else {
1587: $validated = &validate_user($udom, $uname, $upass);
1588: }
1589: if($validated) {
1590: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1591:
1592: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1593: if ($howpwd eq 'internal') {
1594: &Debug("internal auth");
1595: my $salt=time;
1596: $salt=substr($salt,6,2);
1597: my $ncpass=crypt($npass,$salt);
1598: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1599: &logthis("Result of password change for "
1600: ."$uname: pwchange_success");
1601: &Reply($client, "ok\n", $userinput);
1602: } else {
1603: &logthis("Unable to open $uname passwd "
1604: ."to change password");
1605: &Failure( $client, "non_authorized\n",$userinput);
1606: }
1607: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1608: my $result = &change_unix_password($uname, $npass);
1609: &logthis("Result of password change for $uname: ".
1610: $result);
1611: &Reply($client, \$result, $userinput);
1612: } else {
1613: # this just means that the current password mode is not
1614: # one we know how to change (e.g the kerberos auth modes or
1615: # locally written auth handler).
1616: #
1617: &Failure( $client, "auth_mode_error\n", $userinput);
1618: }
1619:
1620: } else {
1621: &Failure( $client, "non_authorized\n", $userinput);
1622: }
1623:
1624: return 1;
1625: }
1626: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1627:
1628: #
1629: # Create a new user. User in this case means a lon-capa user.
1630: # The user must either already exist in some authentication realm
1631: # like kerberos or the /etc/passwd. If not, a user completely local to
1632: # this loncapa system is created.
1633: #
1634: # Parameters:
1635: # $cmd - The command that got us here.
1636: # $tail - Tail of the command (remaining parameters).
1637: # $client - File descriptor connected to client.
1638: # Returns
1639: # 0 - Requested to exit, caller should shut down.
1640: # 1 - Continue processing.
1641: # Implicit inputs:
1642: # The authentication systems describe above have their own forms of implicit
1643: # input into the authentication process that are described above.
1644: sub add_user_handler {
1645:
1646: my ($cmd, $tail, $client) = @_;
1647:
1648:
1649: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1650: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1651:
1652: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1653:
1654:
1655: if($udom eq $currentdomainid) { # Reject new users for other domains...
1656:
1657: my $oldumask=umask(0077);
1658: chomp($npass);
1659: $npass=&unescape($npass);
1660: my $passfilename = &password_path($udom, $uname);
1661: &Debug("Password file created will be:".$passfilename);
1662: if (-e $passfilename) {
1663: &Failure( $client, "already_exists\n", $userinput);
1664: } else {
1665: my $fperror='';
1666: if (!&mkpath($passfilename)) {
1667: $fperror="error: ".($!+0)." mkdir failed while attempting "
1668: ."makeuser";
1669: }
1670: unless ($fperror) {
1671: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1672: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
1673: } else {
1674: &Failure($client, \$fperror, $userinput);
1675: }
1676: }
1677: umask($oldumask);
1678: } else {
1679: &Failure($client, "not_right_domain\n",
1680: $userinput); # Even if we are multihomed.
1681:
1682: }
1683: return 1;
1684:
1685: }
1686: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1687:
1688: #
1689: # Change the authentication method of a user. Note that this may
1690: # also implicitly change the user's password if, for example, the user is
1691: # joining an existing authentication realm. Known authentication realms at
1692: # this time are:
1693: # internal - Purely internal password file (only loncapa knows this user)
1694: # local - Institutionally written authentication module.
1695: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1696: # kerb4 - kerberos version 4
1697: # kerb5 - kerberos version 5
1698: #
1699: # Parameters:
1700: # $cmd - The command that got us here.
1701: # $tail - Tail of the command (remaining parameters).
1702: # $client - File descriptor connected to client.
1703: # Returns
1704: # 0 - Requested to exit, caller should shut down.
1705: # 1 - Continue processing.
1706: # Implicit inputs:
1707: # The authentication systems describe above have their own forms of implicit
1708: # input into the authentication process that are described above.
1709: # NOTE:
1710: # This is also used to change the authentication credential values (e.g. passwd).
1711: #
1712: #
1713: sub change_authentication_handler {
1714:
1715: my ($cmd, $tail, $client) = @_;
1716:
1717: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1718:
1719: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1720: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1721: if ($udom ne $currentdomainid) {
1722: &Failure( $client, "not_right_domain\n", $client);
1723: } else {
1724:
1725: chomp($npass);
1726:
1727: $npass=&unescape($npass);
1728: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1729: my $passfilename = &password_path($udom, $uname);
1730: if ($passfilename) { # Not allowed to create a new user!!
1731: # If just changing the unix passwd. need to arrange to run
1732: # passwd since otherwise make_passwd_file will run
1733: # lcuseradd which fails if an account already exists
1734: # (to prevent an unscrupulous LONCAPA admin from stealing
1735: # an existing account by overwriting it as a LonCAPA account).
1736:
1737: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1738: my $result = &change_unix_password($uname, $npass);
1739: &logthis("Result of password change for $uname: ".$result);
1740: if ($result eq "ok") {
1741: &Reply($client, \$result);
1742: } else {
1743: &Failure($client, \$result);
1744: }
1745: } else {
1746: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1747: #
1748: # If the current auth mode is internal, and the old auth mode was
1749: # unix, or krb*, and the user is an author for this domain,
1750: # re-run manage_permissions for that role in order to be able
1751: # to take ownership of the construction space back to www:www
1752: #
1753:
1754:
1755: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
1756: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1757: if(&is_author($udom, $uname)) {
1758: &Debug(" Need to manage author permissions...");
1759: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1760: }
1761: }
1762: &Reply($client, \$result, $userinput);
1763: }
1764:
1765:
1766: } else {
1767: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1768: }
1769: }
1770: return 1;
1771: }
1772: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1773:
1774: #
1775: # Determines if this is the home server for a user. The home server
1776: # for a user will have his/her lon-capa passwd file. Therefore all we need
1777: # to do is determine if this file exists.
1778: #
1779: # Parameters:
1780: # $cmd - The command that got us here.
1781: # $tail - Tail of the command (remaining parameters).
1782: # $client - File descriptor connected to client.
1783: # Returns
1784: # 0 - Requested to exit, caller should shut down.
1785: # 1 - Continue processing.
1786: # Implicit inputs:
1787: # The authentication systems describe above have their own forms of implicit
1788: # input into the authentication process that are described above.
1789: #
1790: sub is_home_handler {
1791: my ($cmd, $tail, $client) = @_;
1792:
1793: my $userinput = "$cmd:$tail";
1794:
1795: my ($udom,$uname)=split(/:/,$tail);
1796: chomp($uname);
1797: my $passfile = &password_filename($udom, $uname);
1798: if($passfile) {
1799: &Reply( $client, "found\n", $userinput);
1800: } else {
1801: &Failure($client, "not_found\n", $userinput);
1802: }
1803: return 1;
1804: }
1805: ®ister_handler("home", \&is_home_handler, 0,1,0);
1806:
1807: #
1808: # Process an update request for a resource?? I think what's going on here is
1809: # that a resource has been modified that we hold a subscription to.
1810: # If the resource is not local, then we must update, or at least invalidate our
1811: # cached copy of the resource.
1812: # FUTURE WORK:
1813: # I need to look at this logic carefully. My druthers would be to follow
1814: # typical caching logic, and simple invalidate the cache, drop any subscription
1815: # an let the next fetch start the ball rolling again... however that may
1816: # actually be more difficult than it looks given the complex web of
1817: # proxy servers.
1818: # Parameters:
1819: # $cmd - The command that got us here.
1820: # $tail - Tail of the command (remaining parameters).
1821: # $client - File descriptor connected to client.
1822: # Returns
1823: # 0 - Requested to exit, caller should shut down.
1824: # 1 - Continue processing.
1825: # Implicit inputs:
1826: # The authentication systems describe above have their own forms of implicit
1827: # input into the authentication process that are described above.
1828: #
1829: sub update_resource_handler {
1830:
1831: my ($cmd, $tail, $client) = @_;
1832:
1833: my $userinput = "$cmd:$tail";
1834:
1835: my $fname= $tail; # This allows interactive testing
1836:
1837:
1838: my $ownership=ishome($fname);
1839: if ($ownership eq 'not_owner') {
1840: if (-e $fname) {
1841: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1842: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1843: my $now=time;
1844: my $since=$now-$atime;
1845: if ($since>$perlvar{'lonExpire'}) {
1846: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
1847: &devalidate_meta_cache($fname);
1848: unlink("$fname");
1849: unlink("$fname.meta");
1850: } else {
1851: my $transname="$fname.in.transfer";
1852: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
1853: my $response;
1854: alarm(120);
1855: {
1856: my $ua=new LWP::UserAgent;
1857: my $request=new HTTP::Request('GET',"$remoteurl");
1858: $response=$ua->request($request,$transname);
1859: }
1860: alarm(0);
1861: if ($response->is_error()) {
1862: unlink($transname);
1863: my $message=$response->status_line;
1864: &logthis("LWP GET: $message for $fname ($remoteurl)");
1865: } else {
1866: if ($remoteurl!~/\.meta$/) {
1867: alarm(120);
1868: {
1869: my $ua=new LWP::UserAgent;
1870: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1871: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1872: if ($mresponse->is_error()) {
1873: unlink($fname.'.meta');
1874: }
1875: }
1876: alarm(0);
1877: }
1878: rename($transname,$fname);
1879: &devalidate_meta_cache($fname);
1880: }
1881: }
1882: &Reply( $client, "ok\n", $userinput);
1883: } else {
1884: &Failure($client, "not_found\n", $userinput);
1885: }
1886: } else {
1887: &Failure($client, "rejected\n", $userinput);
1888: }
1889: return 1;
1890: }
1891: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1892:
1893: sub devalidate_meta_cache {
1894: my ($url) = @_;
1895: use Cache::Memcached;
1896: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1897: $url = &Apache::lonnet::declutter($url);
1898: $url =~ s-\.meta$--;
1899: my $id = &escape('meta:'.$url);
1900: $memcache->delete($id);
1901: }
1902:
1903: #
1904: # Fetch a user file from a remote server to the user's home directory
1905: # userfiles subdir.
1906: # Parameters:
1907: # $cmd - The command that got us here.
1908: # $tail - Tail of the command (remaining parameters).
1909: # $client - File descriptor connected to client.
1910: # Returns
1911: # 0 - Requested to exit, caller should shut down.
1912: # 1 - Continue processing.
1913: #
1914: sub fetch_user_file_handler {
1915:
1916: my ($cmd, $tail, $client) = @_;
1917:
1918: my $userinput = "$cmd:$tail";
1919: my $fname = $tail;
1920: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1921: my $udir=&propath($udom,$uname).'/userfiles';
1922: unless (-e $udir) {
1923: mkdir($udir,0770);
1924: }
1925: Debug("fetch user file for $fname");
1926: if (-e $udir) {
1927: $ufile=~s/^[\.\~]+//;
1928:
1929: # IF necessary, create the path right down to the file.
1930: # Note that any regular files in the way of this path are
1931: # wiped out to deal with some earlier folly of mine.
1932:
1933: if (!&mkpath($udir.'/'.$ufile)) {
1934: &Failure($client, "unable_to_create\n", $userinput);
1935: }
1936:
1937: my $destname=$udir.'/'.$ufile;
1938: my $transname=$udir.'/'.$ufile.'.in.transit';
1939: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1940: my $response;
1941: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1942: alarm(120);
1943: {
1944: my $ua=new LWP::UserAgent;
1945: my $request=new HTTP::Request('GET',"$remoteurl");
1946: $response=$ua->request($request,$transname);
1947: }
1948: alarm(0);
1949: if ($response->is_error()) {
1950: unlink($transname);
1951: my $message=$response->status_line;
1952: &logthis("LWP GET: $message for $fname ($remoteurl)");
1953: &Failure($client, "failed\n", $userinput);
1954: } else {
1955: Debug("Renaming $transname to $destname");
1956: if (!rename($transname,$destname)) {
1957: &logthis("Unable to move $transname to $destname");
1958: unlink($transname);
1959: &Failure($client, "failed\n", $userinput);
1960: } else {
1961: &Reply($client, "ok\n", $userinput);
1962: }
1963: }
1964: } else {
1965: &Failure($client, "not_home\n", $userinput);
1966: }
1967: return 1;
1968: }
1969: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1970:
1971: #
1972: # Remove a file from a user's home directory userfiles subdirectory.
1973: # Parameters:
1974: # cmd - the Lond request keyword that got us here.
1975: # tail - the part of the command past the keyword.
1976: # client- File descriptor connected with the client.
1977: #
1978: # Returns:
1979: # 1 - Continue processing.
1980: sub remove_user_file_handler {
1981: my ($cmd, $tail, $client) = @_;
1982:
1983: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1984:
1985: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1986: if ($ufile =~m|/\.\./|) {
1987: # any files paths with /../ in them refuse
1988: # to deal with
1989: &Failure($client, "refused\n", "$cmd:$tail");
1990: } else {
1991: my $udir = &propath($udom,$uname);
1992: if (-e $udir) {
1993: my $file=$udir.'/userfiles/'.$ufile;
1994: if (-e $file) {
1995: #
1996: # If the file is a regular file unlink is fine...
1997: # However it's possible the client wants a dir.
1998: # removed, in which case rmdir is more approprate:
1999: #
2000: if (-f $file){
2001: unlink($file);
2002: } elsif(-d $file) {
2003: rmdir($file);
2004: }
2005: if (-e $file) {
2006: # File is still there after we deleted it ?!?
2007:
2008: &Failure($client, "failed\n", "$cmd:$tail");
2009: } else {
2010: &Reply($client, "ok\n", "$cmd:$tail");
2011: }
2012: } else {
2013: &Failure($client, "not_found\n", "$cmd:$tail");
2014: }
2015: } else {
2016: &Failure($client, "not_home\n", "$cmd:$tail");
2017: }
2018: }
2019: return 1;
2020: }
2021: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2022:
2023: #
2024: # make a directory in a user's home directory userfiles subdirectory.
2025: # Parameters:
2026: # cmd - the Lond request keyword that got us here.
2027: # tail - the part of the command past the keyword.
2028: # client- File descriptor connected with the client.
2029: #
2030: # Returns:
2031: # 1 - Continue processing.
2032: sub mkdir_user_file_handler {
2033: my ($cmd, $tail, $client) = @_;
2034:
2035: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2036: $dir=&unescape($dir);
2037: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2038: if ($ufile =~m|/\.\./|) {
2039: # any files paths with /../ in them refuse
2040: # to deal with
2041: &Failure($client, "refused\n", "$cmd:$tail");
2042: } else {
2043: my $udir = &propath($udom,$uname);
2044: if (-e $udir) {
2045: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2046: if (!&mkpath($newdir)) {
2047: &Failure($client, "failed\n", "$cmd:$tail");
2048: }
2049: &Reply($client, "ok\n", "$cmd:$tail");
2050: } else {
2051: &Failure($client, "not_home\n", "$cmd:$tail");
2052: }
2053: }
2054: return 1;
2055: }
2056: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2057:
2058: #
2059: # rename a file in a user's home directory userfiles subdirectory.
2060: # Parameters:
2061: # cmd - the Lond request keyword that got us here.
2062: # tail - the part of the command past the keyword.
2063: # client- File descriptor connected with the client.
2064: #
2065: # Returns:
2066: # 1 - Continue processing.
2067: sub rename_user_file_handler {
2068: my ($cmd, $tail, $client) = @_;
2069:
2070: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2071: $old=&unescape($old);
2072: $new=&unescape($new);
2073: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2074: # any files paths with /../ in them refuse to deal with
2075: &Failure($client, "refused\n", "$cmd:$tail");
2076: } else {
2077: my $udir = &propath($udom,$uname);
2078: if (-e $udir) {
2079: my $oldfile=$udir.'/userfiles/'.$old;
2080: my $newfile=$udir.'/userfiles/'.$new;
2081: if (-e $newfile) {
2082: &Failure($client, "exists\n", "$cmd:$tail");
2083: } elsif (! -e $oldfile) {
2084: &Failure($client, "not_found\n", "$cmd:$tail");
2085: } else {
2086: if (!rename($oldfile,$newfile)) {
2087: &Failure($client, "failed\n", "$cmd:$tail");
2088: } else {
2089: &Reply($client, "ok\n", "$cmd:$tail");
2090: }
2091: }
2092: } else {
2093: &Failure($client, "not_home\n", "$cmd:$tail");
2094: }
2095: }
2096: return 1;
2097: }
2098: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2099:
2100: #
2101: # Checks if the specified user has an active session on the server
2102: # return ok if so, not_found if not
2103: #
2104: # Parameters:
2105: # cmd - The request keyword that dispatched to tus.
2106: # tail - The tail of the request (colon separated parameters).
2107: # client - Filehandle open on the client.
2108: # Return:
2109: # 1.
2110: sub user_has_session_handler {
2111: my ($cmd, $tail, $client) = @_;
2112:
2113: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2114:
2115: &logthis("Looking for $udom $uname");
2116: opendir(DIR,$perlvar{'lonIDsDir'});
2117: my $filename;
2118: while ($filename=readdir(DIR)) {
2119: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2120: }
2121: if ($filename) {
2122: &Reply($client, "ok\n", "$cmd:$tail");
2123: } else {
2124: &Failure($client, "not_found\n", "$cmd:$tail");
2125: }
2126: return 1;
2127:
2128: }
2129: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2130:
2131: #
2132: # Authenticate access to a user file by checking that the token the user's
2133: # passed also exists in their session file
2134: #
2135: # Parameters:
2136: # cmd - The request keyword that dispatched to tus.
2137: # tail - The tail of the request (colon separated parameters).
2138: # client - Filehandle open on the client.
2139: # Return:
2140: # 1.
2141: sub token_auth_user_file_handler {
2142: my ($cmd, $tail, $client) = @_;
2143:
2144: my ($fname, $session) = split(/:/, $tail);
2145:
2146: chomp($session);
2147: my $reply="non_auth";
2148: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2149: if (open(ENVIN,"$file")) {
2150: flock(ENVIN,LOCK_SH);
2151: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2152: if (exists($disk_env{"userfile.$fname"})) {
2153: $reply="ok";
2154: } else {
2155: foreach my $envname (keys(%disk_env)) {
2156: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2157: $reply="ok";
2158: last;
2159: }
2160: }
2161: }
2162: untie(%disk_env);
2163: close(ENVIN);
2164: &Reply($client, \$reply, "$cmd:$tail");
2165: } else {
2166: &Failure($client, "invalid_token\n", "$cmd:$tail");
2167: }
2168: return 1;
2169:
2170: }
2171: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2172:
2173: #
2174: # Unsubscribe from a resource.
2175: #
2176: # Parameters:
2177: # $cmd - The command that got us here.
2178: # $tail - Tail of the command (remaining parameters).
2179: # $client - File descriptor connected to client.
2180: # Returns
2181: # 0 - Requested to exit, caller should shut down.
2182: # 1 - Continue processing.
2183: #
2184: sub unsubscribe_handler {
2185: my ($cmd, $tail, $client) = @_;
2186:
2187: my $userinput= "$cmd:$tail";
2188:
2189: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2190:
2191: &Debug("Unsubscribing $fname");
2192: if (-e $fname) {
2193: &Debug("Exists");
2194: &Reply($client, &unsub($fname,$clientip), $userinput);
2195: } else {
2196: &Failure($client, "not_found\n", $userinput);
2197: }
2198: return 1;
2199: }
2200: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2201:
2202: # Subscribe to a resource
2203: #
2204: # Parameters:
2205: # $cmd - The command that got us here.
2206: # $tail - Tail of the command (remaining parameters).
2207: # $client - File descriptor connected to client.
2208: # Returns
2209: # 0 - Requested to exit, caller should shut down.
2210: # 1 - Continue processing.
2211: #
2212: sub subscribe_handler {
2213: my ($cmd, $tail, $client)= @_;
2214:
2215: my $userinput = "$cmd:$tail";
2216:
2217: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2218:
2219: return 1;
2220: }
2221: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2222:
2223: #
2224: # Determine the latest version of a resource (it looks for the highest
2225: # past version and then returns that +1)
2226: #
2227: # Parameters:
2228: # $cmd - The command that got us here.
2229: # $tail - Tail of the command (remaining parameters).
2230: # (Should consist of an absolute path to a file)
2231: # $client - File descriptor connected to client.
2232: # Returns
2233: # 0 - Requested to exit, caller should shut down.
2234: # 1 - Continue processing.
2235: #
2236: sub current_version_handler {
2237: my ($cmd, $tail, $client) = @_;
2238:
2239: my $userinput= "$cmd:$tail";
2240:
2241: my $fname = $tail;
2242: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2243: return 1;
2244:
2245: }
2246: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2247:
2248: # Make an entry in a user's activity log.
2249: #
2250: # Parameters:
2251: # $cmd - The command that got us here.
2252: # $tail - Tail of the command (remaining parameters).
2253: # $client - File descriptor connected to client.
2254: # Returns
2255: # 0 - Requested to exit, caller should shut down.
2256: # 1 - Continue processing.
2257: #
2258: sub activity_log_handler {
2259: my ($cmd, $tail, $client) = @_;
2260:
2261:
2262: my $userinput= "$cmd:$tail";
2263:
2264: my ($udom,$uname,$what)=split(/:/,$tail);
2265: chomp($what);
2266: my $proname=&propath($udom,$uname);
2267: my $now=time;
2268: my $hfh;
2269: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2270: print $hfh "$now:$clientname:$what\n";
2271: &Reply( $client, "ok\n", $userinput);
2272: } else {
2273: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2274: ."while attempting log\n",
2275: $userinput);
2276: }
2277:
2278: return 1;
2279: }
2280: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2281:
2282: #
2283: # Put a namespace entry in a user profile hash.
2284: # My druthers would be for this to be an encrypted interaction too.
2285: # anything that might be an inadvertent covert channel about either
2286: # user authentication or user personal information....
2287: #
2288: # Parameters:
2289: # $cmd - The command that got us here.
2290: # $tail - Tail of the command (remaining parameters).
2291: # $client - File descriptor connected to client.
2292: # Returns
2293: # 0 - Requested to exit, caller should shut down.
2294: # 1 - Continue processing.
2295: #
2296: sub put_user_profile_entry {
2297: my ($cmd, $tail, $client) = @_;
2298:
2299: my $userinput = "$cmd:$tail";
2300:
2301: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2302: if ($namespace ne 'roles') {
2303: chomp($what);
2304: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2305: &GDBM_WRCREAT(),"P",$what);
2306: if($hashref) {
2307: my @pairs=split(/\&/,$what);
2308: foreach my $pair (@pairs) {
2309: my ($key,$value)=split(/=/,$pair);
2310: $hashref->{$key}=$value;
2311: }
2312: if (&untie_user_hash($hashref)) {
2313: &Reply( $client, "ok\n", $userinput);
2314: } else {
2315: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2316: "while attempting put\n",
2317: $userinput);
2318: }
2319: } else {
2320: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2321: "while attempting put\n", $userinput);
2322: }
2323: } else {
2324: &Failure( $client, "refused\n", $userinput);
2325: }
2326:
2327: return 1;
2328: }
2329: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2330:
2331: # Put a piece of new data in hash, returns error if entry already exists
2332: # Parameters:
2333: # $cmd - The command that got us here.
2334: # $tail - Tail of the command (remaining parameters).
2335: # $client - File descriptor connected to client.
2336: # Returns
2337: # 0 - Requested to exit, caller should shut down.
2338: # 1 - Continue processing.
2339: #
2340: sub newput_user_profile_entry {
2341: my ($cmd, $tail, $client) = @_;
2342:
2343: my $userinput = "$cmd:$tail";
2344:
2345: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2346: if ($namespace eq 'roles') {
2347: &Failure( $client, "refused\n", $userinput);
2348: return 1;
2349: }
2350:
2351: chomp($what);
2352:
2353: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2354: &GDBM_WRCREAT(),"N",$what);
2355: if(!$hashref) {
2356: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2357: "while attempting put\n", $userinput);
2358: return 1;
2359: }
2360:
2361: my @pairs=split(/\&/,$what);
2362: foreach my $pair (@pairs) {
2363: my ($key,$value)=split(/=/,$pair);
2364: if (exists($hashref->{$key})) {
2365: &Failure($client, "key_exists: ".$key."\n",$userinput);
2366: return 1;
2367: }
2368: }
2369:
2370: foreach my $pair (@pairs) {
2371: my ($key,$value)=split(/=/,$pair);
2372: $hashref->{$key}=$value;
2373: }
2374:
2375: if (&untie_user_hash($hashref)) {
2376: &Reply( $client, "ok\n", $userinput);
2377: } else {
2378: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2379: "while attempting put\n",
2380: $userinput);
2381: }
2382: return 1;
2383: }
2384: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2385:
2386: #
2387: # Increment a profile entry in the user history file.
2388: # The history contains keyword value pairs. In this case,
2389: # The value itself is a pair of numbers. The first, the current value
2390: # the second an increment that this function applies to the current
2391: # value.
2392: #
2393: # Parameters:
2394: # $cmd - The command that got us here.
2395: # $tail - Tail of the command (remaining parameters).
2396: # $client - File descriptor connected to client.
2397: # Returns
2398: # 0 - Requested to exit, caller should shut down.
2399: # 1 - Continue processing.
2400: #
2401: sub increment_user_value_handler {
2402: my ($cmd, $tail, $client) = @_;
2403:
2404: my $userinput = "$cmd:$tail";
2405:
2406: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2407: if ($namespace ne 'roles') {
2408: chomp($what);
2409: my $hashref = &tie_user_hash($udom, $uname,
2410: $namespace, &GDBM_WRCREAT(),
2411: "P",$what);
2412: if ($hashref) {
2413: my @pairs=split(/\&/,$what);
2414: foreach my $pair (@pairs) {
2415: my ($key,$value)=split(/=/,$pair);
2416: $value = &unescape($value);
2417: # We could check that we have a number...
2418: if (! defined($value) || $value eq '') {
2419: $value = 1;
2420: }
2421: $hashref->{$key}+=$value;
2422: if ($namespace eq 'nohist_resourcetracker') {
2423: if ($hashref->{$key} < 0) {
2424: $hashref->{$key} = 0;
2425: }
2426: }
2427: }
2428: if (&untie_user_hash($hashref)) {
2429: &Reply( $client, "ok\n", $userinput);
2430: } else {
2431: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2432: "while attempting inc\n", $userinput);
2433: }
2434: } else {
2435: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2436: "while attempting inc\n", $userinput);
2437: }
2438: } else {
2439: &Failure($client, "refused\n", $userinput);
2440: }
2441:
2442: return 1;
2443: }
2444: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2445:
2446: #
2447: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2448: # Each 'role' a user has implies a set of permissions. Adding a new role
2449: # for a person grants the permissions packaged with that role
2450: # to that user when the role is selected.
2451: #
2452: # Parameters:
2453: # $cmd - The command string (rolesput).
2454: # $tail - The remainder of the request line. For rolesput this
2455: # consists of a colon separated list that contains:
2456: # The domain and user that is granting the role (logged).
2457: # The domain and user that is getting the role.
2458: # The roles being granted as a set of & separated pairs.
2459: # each pair a key value pair.
2460: # $client - File descriptor connected to the client.
2461: # Returns:
2462: # 0 - If the daemon should exit
2463: # 1 - To continue processing.
2464: #
2465: #
2466: sub roles_put_handler {
2467: my ($cmd, $tail, $client) = @_;
2468:
2469: my $userinput = "$cmd:$tail";
2470:
2471: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2472:
2473:
2474: my $namespace='roles';
2475: chomp($what);
2476: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2477: &GDBM_WRCREAT(), "P",
2478: "$exedom:$exeuser:$what");
2479: #
2480: # Log the attempt to set a role. The {}'s here ensure that the file
2481: # handle is open for the minimal amount of time. Since the flush
2482: # is done on close this improves the chances the log will be an un-
2483: # corrupted ordered thing.
2484: if ($hashref) {
2485: my $pass_entry = &get_auth_type($udom, $uname);
2486: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2487: $auth_type = $auth_type.":";
2488: my @pairs=split(/\&/,$what);
2489: foreach my $pair (@pairs) {
2490: my ($key,$value)=split(/=/,$pair);
2491: &manage_permissions($key, $udom, $uname,
2492: $auth_type);
2493: $hashref->{$key}=$value;
2494: }
2495: if (&untie_user_hash($hashref)) {
2496: &Reply($client, "ok\n", $userinput);
2497: } else {
2498: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2499: "while attempting rolesput\n", $userinput);
2500: }
2501: } else {
2502: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2503: "while attempting rolesput\n", $userinput);
2504: }
2505: return 1;
2506: }
2507: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2508:
2509: #
2510: # Deletes (removes) a role for a user. This is equivalent to removing
2511: # a permissions package associated with the role from the user's profile.
2512: #
2513: # Parameters:
2514: # $cmd - The command (rolesdel)
2515: # $tail - The remainder of the request line. This consists
2516: # of:
2517: # The domain and user requesting the change (logged)
2518: # The domain and user being changed.
2519: # The roles being revoked. These are shipped to us
2520: # as a bunch of & separated role name keywords.
2521: # $client - The file handle open on the client.
2522: # Returns:
2523: # 1 - Continue processing
2524: # 0 - Exit.
2525: #
2526: sub roles_delete_handler {
2527: my ($cmd, $tail, $client) = @_;
2528:
2529: my $userinput = "$cmd:$tail";
2530:
2531: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2532: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2533: "what = ".$what);
2534: my $namespace='roles';
2535: chomp($what);
2536: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2537: &GDBM_WRCREAT(), "D",
2538: "$exedom:$exeuser:$what");
2539:
2540: if ($hashref) {
2541: my @rolekeys=split(/\&/,$what);
2542:
2543: foreach my $key (@rolekeys) {
2544: delete $hashref->{$key};
2545: }
2546: if (&untie_user_hash($hashref)) {
2547: &Reply($client, "ok\n", $userinput);
2548: } else {
2549: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2550: "while attempting rolesdel\n", $userinput);
2551: }
2552: } else {
2553: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2554: "while attempting rolesdel\n", $userinput);
2555: }
2556:
2557: return 1;
2558: }
2559: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2560:
2561: # Unencrypted get from a user's profile database. See
2562: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2563: # This function retrieves a keyed item from a specific named database in the
2564: # user's directory.
2565: #
2566: # Parameters:
2567: # $cmd - Command request keyword (get).
2568: # $tail - Tail of the command. This is a colon separated list
2569: # consisting of the domain and username that uniquely
2570: # identifies the profile,
2571: # The 'namespace' which selects the gdbm file to
2572: # do the lookup in,
2573: # & separated list of keys to lookup. Note that
2574: # the values are returned as an & separated list too.
2575: # $client - File descriptor open on the client.
2576: # Returns:
2577: # 1 - Continue processing.
2578: # 0 - Exit.
2579: #
2580: sub get_profile_entry {
2581: my ($cmd, $tail, $client) = @_;
2582:
2583: my $userinput= "$cmd:$tail";
2584:
2585: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2586: chomp($what);
2587:
2588:
2589: my $replystring = read_profile($udom, $uname, $namespace, $what);
2590: my ($first) = split(/:/,$replystring);
2591: if($first ne "error") {
2592: &Reply($client, \$replystring, $userinput);
2593: } else {
2594: &Failure($client, $replystring." while attempting get\n", $userinput);
2595: }
2596: return 1;
2597:
2598:
2599: }
2600: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2601:
2602: #
2603: # Process the encrypted get request. Note that the request is sent
2604: # in clear, but the reply is encrypted. This is a small covert channel:
2605: # information about the sensitive keys is given to the snooper. Just not
2606: # information about the values of the sensitive key. Hmm if I wanted to
2607: # know these I'd snoop for the egets. Get the profile item names from them
2608: # and then issue a get for them since there's no enforcement of the
2609: # requirement of an encrypted get for particular profile items. If I
2610: # were re-doing this, I'd force the request to be encrypted as well as the
2611: # reply. I'd also just enforce encrypted transactions for all gets since
2612: # that would prevent any covert channel snooping.
2613: #
2614: # Parameters:
2615: # $cmd - Command keyword of request (eget).
2616: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2617: # $client - File open on the client.
2618: # Returns:
2619: # 1 - Continue processing
2620: # 0 - server should exit.
2621: sub get_profile_entry_encrypted {
2622: my ($cmd, $tail, $client) = @_;
2623:
2624: my $userinput = "$cmd:$tail";
2625:
2626: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2627: chomp($what);
2628: my $qresult = read_profile($udom, $uname, $namespace, $what);
2629: my ($first) = split(/:/, $qresult);
2630: if($first ne "error") {
2631:
2632: if ($cipher) {
2633: my $cmdlength=length($qresult);
2634: $qresult.=" ";
2635: my $encqresult='';
2636: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2637: $encqresult.= unpack("H16",
2638: $cipher->encrypt(substr($qresult,
2639: $encidx,
2640: 8)));
2641: }
2642: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2643: } else {
2644: &Failure( $client, "error:no_key\n", $userinput);
2645: }
2646: } else {
2647: &Failure($client, "$qresult while attempting eget\n", $userinput);
2648:
2649: }
2650:
2651: return 1;
2652: }
2653: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
2654:
2655: #
2656: # Deletes a key in a user profile database.
2657: #
2658: # Parameters:
2659: # $cmd - Command keyword (del).
2660: # $tail - Command tail. IN this case a colon
2661: # separated list containing:
2662: # The domain and user that identifies uniquely
2663: # the identity of the user.
2664: # The profile namespace (name of the profile
2665: # database file).
2666: # & separated list of keywords to delete.
2667: # $client - File open on client socket.
2668: # Returns:
2669: # 1 - Continue processing
2670: # 0 - Exit server.
2671: #
2672: #
2673: sub delete_profile_entry {
2674: my ($cmd, $tail, $client) = @_;
2675:
2676: my $userinput = "cmd:$tail";
2677:
2678: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2679: chomp($what);
2680: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2681: &GDBM_WRCREAT(),
2682: "D",$what);
2683: if ($hashref) {
2684: my @keys=split(/\&/,$what);
2685: foreach my $key (@keys) {
2686: delete($hashref->{$key});
2687: }
2688: if (&untie_user_hash($hashref)) {
2689: &Reply($client, "ok\n", $userinput);
2690: } else {
2691: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2692: "while attempting del\n", $userinput);
2693: }
2694: } else {
2695: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2696: "while attempting del\n", $userinput);
2697: }
2698: return 1;
2699: }
2700: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2701:
2702: #
2703: # List the set of keys that are defined in a profile database file.
2704: # A successful reply from this will contain an & separated list of
2705: # the keys.
2706: # Parameters:
2707: # $cmd - Command request (keys).
2708: # $tail - Remainder of the request, a colon separated
2709: # list containing domain/user that identifies the
2710: # user being queried, and the database namespace
2711: # (database filename essentially).
2712: # $client - File open on the client.
2713: # Returns:
2714: # 1 - Continue processing.
2715: # 0 - Exit the server.
2716: #
2717: sub get_profile_keys {
2718: my ($cmd, $tail, $client) = @_;
2719:
2720: my $userinput = "$cmd:$tail";
2721:
2722: my ($udom,$uname,$namespace)=split(/:/,$tail);
2723: my $qresult='';
2724: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2725: &GDBM_READER());
2726: if ($hashref) {
2727: foreach my $key (keys %$hashref) {
2728: $qresult.="$key&";
2729: }
2730: if (&untie_user_hash($hashref)) {
2731: $qresult=~s/\&$//;
2732: &Reply($client, \$qresult, $userinput);
2733: } else {
2734: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2735: "while attempting keys\n", $userinput);
2736: }
2737: } else {
2738: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2739: "while attempting keys\n", $userinput);
2740: }
2741:
2742: return 1;
2743: }
2744: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2745:
2746: #
2747: # Dump the contents of a user profile database.
2748: # Note that this constitutes a very large covert channel too since
2749: # the dump will return sensitive information that is not encrypted.
2750: # The naive security assumption is that the session negotiation ensures
2751: # our client is trusted and I don't believe that's assured at present.
2752: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2753: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2754: #
2755: # Parameters:
2756: # $cmd - The command request keyword (currentdump).
2757: # $tail - Remainder of the request, consisting of a colon
2758: # separated list that has the domain/username and
2759: # the namespace to dump (database file).
2760: # $client - file open on the remote client.
2761: # Returns:
2762: # 1 - Continue processing.
2763: # 0 - Exit the server.
2764: #
2765: sub dump_profile_database {
2766: my ($cmd, $tail, $client) = @_;
2767:
2768: my $userinput = "$cmd:$tail";
2769:
2770: my ($udom,$uname,$namespace) = split(/:/,$tail);
2771: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2772: &GDBM_READER());
2773: if ($hashref) {
2774: # Structure of %data:
2775: # $data{$symb}->{$parameter}=$value;
2776: # $data{$symb}->{'v.'.$parameter}=$version;
2777: # since $parameter will be unescaped, we do not
2778: # have to worry about silly parameter names...
2779:
2780: my $qresult='';
2781: my %data = (); # A hash of anonymous hashes..
2782: while (my ($key,$value) = each(%$hashref)) {
2783: my ($v,$symb,$param) = split(/:/,$key);
2784: next if ($v eq 'version' || $symb eq 'keys');
2785: next if (exists($data{$symb}) &&
2786: exists($data{$symb}->{$param}) &&
2787: $data{$symb}->{'v.'.$param} > $v);
2788: $data{$symb}->{$param}=$value;
2789: $data{$symb}->{'v.'.$param}=$v;
2790: }
2791: if (&untie_user_hash($hashref)) {
2792: while (my ($symb,$param_hash) = each(%data)) {
2793: while(my ($param,$value) = each (%$param_hash)){
2794: next if ($param =~ /^v\./); # Ignore versions...
2795: #
2796: # Just dump the symb=value pairs separated by &
2797: #
2798: $qresult.=$symb.':'.$param.'='.$value.'&';
2799: }
2800: }
2801: chop($qresult);
2802: &Reply($client , \$qresult, $userinput);
2803: } else {
2804: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2805: "while attempting currentdump\n", $userinput);
2806: }
2807: } else {
2808: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2809: "while attempting currentdump\n", $userinput);
2810: }
2811:
2812: return 1;
2813: }
2814: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2815:
2816: #
2817: # Dump a profile database with an optional regular expression
2818: # to match against the keys. In this dump, no effort is made
2819: # to separate symb from version information. Presumably the
2820: # databases that are dumped by this command are of a different
2821: # structure. Need to look at this and improve the documentation of
2822: # both this and the currentdump handler.
2823: # Parameters:
2824: # $cmd - The command keyword.
2825: # $tail - All of the characters after the $cmd:
2826: # These are expected to be a colon
2827: # separated list containing:
2828: # domain/user - identifying the user.
2829: # namespace - identifying the database.
2830: # regexp - optional regular expression
2831: # that is matched against
2832: # database keywords to do
2833: # selective dumps.
2834: # $client - Channel open on the client.
2835: # Returns:
2836: # 1 - Continue processing.
2837: # Side effects:
2838: # response is written to $client.
2839: #
2840: sub dump_with_regexp {
2841: my ($cmd, $tail, $client) = @_;
2842:
2843:
2844: my $userinput = "$cmd:$tail";
2845:
2846: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
2847: if (defined($regexp)) {
2848: $regexp=&unescape($regexp);
2849: } else {
2850: $regexp='.';
2851: }
2852: my ($start,$end);
2853: if (defined($range)) {
2854: if ($range =~/^(\d+)\-(\d+)$/) {
2855: ($start,$end) = ($1,$2);
2856: } elsif ($range =~/^(\d+)$/) {
2857: ($start,$end) = (0,$1);
2858: } else {
2859: undef($range);
2860: }
2861: }
2862: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2863: &GDBM_READER());
2864: if ($hashref) {
2865: my $qresult='';
2866: my $count=0;
2867: while (my ($key,$value) = each(%$hashref)) {
2868: if ($regexp eq '.') {
2869: $count++;
2870: if (defined($range) && $count >= $end) { last; }
2871: if (defined($range) && $count < $start) { next; }
2872: $qresult.=$key.'='.$value.'&';
2873: } else {
2874: my $unescapeKey = &unescape($key);
2875: if (eval('$unescapeKey=~/$regexp/')) {
2876: $count++;
2877: if (defined($range) && $count >= $end) { last; }
2878: if (defined($range) && $count < $start) { next; }
2879: $qresult.="$key=$value&";
2880: }
2881: }
2882: }
2883: if (&untie_user_hash($hashref)) {
2884: chop($qresult);
2885: &Reply($client, \$qresult, $userinput);
2886: } else {
2887: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2888: "while attempting dump\n", $userinput);
2889: }
2890: } else {
2891: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2892: "while attempting dump\n", $userinput);
2893: }
2894:
2895: return 1;
2896: }
2897: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2898:
2899: # Store a set of key=value pairs associated with a versioned name.
2900: #
2901: # Parameters:
2902: # $cmd - Request command keyword.
2903: # $tail - Tail of the request. This is a colon
2904: # separated list containing:
2905: # domain/user - User and authentication domain.
2906: # namespace - Name of the database being modified
2907: # rid - Resource keyword to modify.
2908: # what - new value associated with rid.
2909: #
2910: # $client - Socket open on the client.
2911: #
2912: #
2913: # Returns:
2914: # 1 (keep on processing).
2915: # Side-Effects:
2916: # Writes to the client
2917: sub store_handler {
2918: my ($cmd, $tail, $client) = @_;
2919:
2920: my $userinput = "$cmd:$tail";
2921:
2922: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2923: if ($namespace ne 'roles') {
2924:
2925: chomp($what);
2926: my @pairs=split(/\&/,$what);
2927: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2928: &GDBM_WRCREAT(), "S",
2929: "$rid:$what");
2930: if ($hashref) {
2931: my $now = time;
2932: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2933: my $key;
2934: $hashref->{"version:$rid"}++;
2935: my $version=$hashref->{"version:$rid"};
2936: my $allkeys='';
2937: foreach my $pair (@pairs) {
2938: my ($key,$value)=split(/=/,$pair);
2939: $allkeys.=$key.':';
2940: $hashref->{"$version:$rid:$key"}=$value;
2941: }
2942: $hashref->{"$version:$rid:timestamp"}=$now;
2943: $allkeys.='timestamp';
2944: $hashref->{"$version:keys:$rid"}=$allkeys;
2945: if (&untie_user_hash($hashref)) {
2946: &Reply($client, "ok\n", $userinput);
2947: } else {
2948: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2949: "while attempting store\n", $userinput);
2950: }
2951: } else {
2952: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2953: "while attempting store\n", $userinput);
2954: }
2955: } else {
2956: &Failure($client, "refused\n", $userinput);
2957: }
2958:
2959: return 1;
2960: }
2961: ®ister_handler("store", \&store_handler, 0, 1, 0);
2962:
2963: # Modify a set of key=value pairs associated with a versioned name.
2964: #
2965: # Parameters:
2966: # $cmd - Request command keyword.
2967: # $tail - Tail of the request. This is a colon
2968: # separated list containing:
2969: # domain/user - User and authentication domain.
2970: # namespace - Name of the database being modified
2971: # rid - Resource keyword to modify.
2972: # v - Version item to modify
2973: # what - new value associated with rid.
2974: #
2975: # $client - Socket open on the client.
2976: #
2977: #
2978: # Returns:
2979: # 1 (keep on processing).
2980: # Side-Effects:
2981: # Writes to the client
2982: sub putstore_handler {
2983: my ($cmd, $tail, $client) = @_;
2984:
2985: my $userinput = "$cmd:$tail";
2986:
2987: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
2988: if ($namespace ne 'roles') {
2989:
2990: chomp($what);
2991: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2992: &GDBM_WRCREAT(), "M",
2993: "$rid:$v:$what");
2994: if ($hashref) {
2995: my $now = time;
2996: my %data = &hash_extract($what);
2997: my @allkeys;
2998: while (my($key,$value) = each(%data)) {
2999: push(@allkeys,$key);
3000: $hashref->{"$v:$rid:$key"} = $value;
3001: }
3002: my $allkeys = join(':',@allkeys);
3003: $hashref->{"$v:keys:$rid"}=$allkeys;
3004:
3005: if (&untie_user_hash($hashref)) {
3006: &Reply($client, "ok\n", $userinput);
3007: } else {
3008: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3009: "while attempting store\n", $userinput);
3010: }
3011: } else {
3012: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3013: "while attempting store\n", $userinput);
3014: }
3015: } else {
3016: &Failure($client, "refused\n", $userinput);
3017: }
3018:
3019: return 1;
3020: }
3021: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3022:
3023: sub hash_extract {
3024: my ($str)=@_;
3025: my %hash;
3026: foreach my $pair (split(/\&/,$str)) {
3027: my ($key,$value)=split(/=/,$pair);
3028: $hash{$key}=$value;
3029: }
3030: return (%hash);
3031: }
3032: sub hash_to_str {
3033: my ($hash_ref)=@_;
3034: my $str;
3035: foreach my $key (keys(%$hash_ref)) {
3036: $str.=$key.'='.$hash_ref->{$key}.'&';
3037: }
3038: $str=~s/\&$//;
3039: return $str;
3040: }
3041:
3042: #
3043: # Dump out all versions of a resource that has key=value pairs associated
3044: # with it for each version. These resources are built up via the store
3045: # command.
3046: #
3047: # Parameters:
3048: # $cmd - Command keyword.
3049: # $tail - Remainder of the request which consists of:
3050: # domain/user - User and auth. domain.
3051: # namespace - name of resource database.
3052: # rid - Resource id.
3053: # $client - socket open on the client.
3054: #
3055: # Returns:
3056: # 1 indicating the caller should not yet exit.
3057: # Side-effects:
3058: # Writes a reply to the client.
3059: # The reply is a string of the following shape:
3060: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3061: # Where the 1 above represents version 1.
3062: # this continues for all pairs of keys in all versions.
3063: #
3064: #
3065: #
3066: #
3067: sub restore_handler {
3068: my ($cmd, $tail, $client) = @_;
3069:
3070: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3071: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3072: $namespace=~s/\//\_/g;
3073: $namespace = &LONCAPA::clean_username($namespace);
3074:
3075: chomp($rid);
3076: my $qresult='';
3077: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3078: if ($hashref) {
3079: my $version=$hashref->{"version:$rid"};
3080: $qresult.="version=$version&";
3081: my $scope;
3082: for ($scope=1;$scope<=$version;$scope++) {
3083: my $vkeys=$hashref->{"$scope:keys:$rid"};
3084: my @keys=split(/:/,$vkeys);
3085: my $key;
3086: $qresult.="$scope:keys=$vkeys&";
3087: foreach $key (@keys) {
3088: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3089: }
3090: }
3091: if (&untie_user_hash($hashref)) {
3092: $qresult=~s/\&$//;
3093: &Reply( $client, \$qresult, $userinput);
3094: } else {
3095: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3096: "while attempting restore\n", $userinput);
3097: }
3098: } else {
3099: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3100: "while attempting restore\n", $userinput);
3101: }
3102:
3103: return 1;
3104:
3105:
3106: }
3107: ®ister_handler("restore", \&restore_handler, 0,1,0);
3108:
3109: #
3110: # Add a chat message to a synchronous discussion board.
3111: #
3112: # Parameters:
3113: # $cmd - Request keyword.
3114: # $tail - Tail of the command. A colon separated list
3115: # containing:
3116: # cdom - Domain on which the chat board lives
3117: # cnum - Course containing the chat board.
3118: # newpost - Body of the posting.
3119: # group - Optional group, if chat board is only
3120: # accessible in a group within the course
3121: # $client - Socket open on the client.
3122: # Returns:
3123: # 1 - Indicating caller should keep on processing.
3124: #
3125: # Side-effects:
3126: # writes a reply to the client.
3127: #
3128: #
3129: sub send_chat_handler {
3130: my ($cmd, $tail, $client) = @_;
3131:
3132:
3133: my $userinput = "$cmd:$tail";
3134:
3135: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3136: &chat_add($cdom,$cnum,$newpost,$group);
3137: &Reply($client, "ok\n", $userinput);
3138:
3139: return 1;
3140: }
3141: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3142:
3143: #
3144: # Retrieve the set of chat messages from a discussion board.
3145: #
3146: # Parameters:
3147: # $cmd - Command keyword that initiated the request.
3148: # $tail - Remainder of the request after the command
3149: # keyword. In this case a colon separated list of
3150: # chat domain - Which discussion board.
3151: # chat id - Discussion thread(?)
3152: # domain/user - Authentication domain and username
3153: # of the requesting person.
3154: # group - Optional course group containing
3155: # the board.
3156: # $client - Socket open on the client program.
3157: # Returns:
3158: # 1 - continue processing
3159: # Side effects:
3160: # Response is written to the client.
3161: #
3162: sub retrieve_chat_handler {
3163: my ($cmd, $tail, $client) = @_;
3164:
3165:
3166: my $userinput = "$cmd:$tail";
3167:
3168: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3169: my $reply='';
3170: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3171: $reply.=&escape($_).':';
3172: }
3173: $reply=~s/\:$//;
3174: &Reply($client, \$reply, $userinput);
3175:
3176:
3177: return 1;
3178: }
3179: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3180:
3181: #
3182: # Initiate a query of an sql database. SQL query repsonses get put in
3183: # a file for later retrieval. This prevents sql query results from
3184: # bottlenecking the system. Note that with loncnew, perhaps this is
3185: # less of an issue since multiple outstanding requests can be concurrently
3186: # serviced.
3187: #
3188: # Parameters:
3189: # $cmd - COmmand keyword that initiated the request.
3190: # $tail - Remainder of the command after the keyword.
3191: # For this function, this consists of a query and
3192: # 3 arguments that are self-documentingly labelled
3193: # in the original arg1, arg2, arg3.
3194: # $client - Socket open on the client.
3195: # Return:
3196: # 1 - Indicating processing should continue.
3197: # Side-effects:
3198: # a reply is written to $client.
3199: #
3200: sub send_query_handler {
3201: my ($cmd, $tail, $client) = @_;
3202:
3203:
3204: my $userinput = "$cmd:$tail";
3205:
3206: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3207: $query=~s/\n*$//g;
3208: &Reply($client, "". &sql_reply("$clientname\&$query".
3209: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3210: $userinput);
3211:
3212: return 1;
3213: }
3214: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3215:
3216: #
3217: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3218: # The query is submitted via a "querysend" transaction.
3219: # There it is passed on to the lonsql daemon, queued and issued to
3220: # mysql.
3221: # This transaction is invoked when the sql transaction is complete
3222: # it stores the query results in flie and indicates query completion.
3223: # presumably local software then fetches this response... I'm guessing
3224: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3225: # lonsql on completion of the query interacts with the lond of our
3226: # client to do a query reply storing two files:
3227: # - id - The results of the query.
3228: # - id.end - Indicating the transaction completed.
3229: # NOTE: id is a unique id assigned to the query and querysend time.
3230: # Parameters:
3231: # $cmd - Command keyword that initiated this request.
3232: # $tail - Remainder of the tail. In this case that's a colon
3233: # separated list containing the query Id and the
3234: # results of the query.
3235: # $client - Socket open on the client.
3236: # Return:
3237: # 1 - Indicating that we should continue processing.
3238: # Side effects:
3239: # ok written to the client.
3240: #
3241: sub reply_query_handler {
3242: my ($cmd, $tail, $client) = @_;
3243:
3244:
3245: my $userinput = "$cmd:$tail";
3246:
3247: my ($id,$reply)=split(/:/,$tail);
3248: my $store;
3249: my $execdir=$perlvar{'lonDaemons'};
3250: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3251: $reply=~s/\&/\n/g;
3252: print $store $reply;
3253: close $store;
3254: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3255: print $store2 "done\n";
3256: close $store2;
3257: &Reply($client, "ok\n", $userinput);
3258: } else {
3259: &Failure($client, "error: ".($!+0)
3260: ." IO::File->new Failed ".
3261: "while attempting queryreply\n", $userinput);
3262: }
3263:
3264:
3265: return 1;
3266: }
3267: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3268:
3269: #
3270: # Process the courseidput request. Not quite sure what this means
3271: # at the system level sense. It appears a gdbm file in the
3272: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3273: # a set of entries made in that database.
3274: #
3275: # Parameters:
3276: # $cmd - The command keyword that initiated this request.
3277: # $tail - Tail of the command. In this case consists of a colon
3278: # separated list contaning the domain to apply this to and
3279: # an ampersand separated list of keyword=value pairs.
3280: # Each value is a colon separated list that includes:
3281: # description, institutional code and course owner.
3282: # For backward compatibility with versions included
3283: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3284: # code and/or course owner are preserved from the existing
3285: # record when writing a new record in response to 1.1 or
3286: # 1.2 implementations of lonnet::flushcourselogs().
3287: #
3288: # $client - Socket open on the client.
3289: # Returns:
3290: # 1 - indicating that processing should continue
3291: #
3292: # Side effects:
3293: # reply is written to the client.
3294: #
3295: sub put_course_id_handler {
3296: my ($cmd, $tail, $client) = @_;
3297:
3298:
3299: my $userinput = "$cmd:$tail";
3300:
3301: my ($udom, $what) = split(/:/, $tail,2);
3302: chomp($what);
3303: my $now=time;
3304: my @pairs=split(/\&/,$what);
3305:
3306: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3307: if ($hashref) {
3308: foreach my $pair (@pairs) {
3309: my ($key,$courseinfo) = split(/=/,$pair,2);
3310: $courseinfo =~ s/=/:/g;
3311: if (defined($hashref->{$key})) {
3312: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3313: if (ref($value) eq 'HASH') {
3314: my @items = ('description','inst_code','owner','type');
3315: my @new_items = split(/:/,$courseinfo,-1);
3316: my %storehash;
3317: for (my $i=0; $i<@new_items; $i++) {
3318: $storehash{$items[$i]} = &unescape($new_items[$i]);
3319: }
3320: $hashref->{$key} =
3321: &Apache::lonnet::freeze_escape(\%storehash);
3322: my $unesc_key = &unescape($key);
3323: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3324: next;
3325: }
3326: }
3327: my @current_items = split(/:/,$hashref->{$key},-1);
3328: shift(@current_items); # remove description
3329: pop(@current_items); # remove last access
3330: my $numcurrent = scalar(@current_items);
3331: if ($numcurrent > 3) {
3332: $numcurrent = 3;
3333: }
3334: my @new_items = split(/:/,$courseinfo,-1);
3335: my $numnew = scalar(@new_items);
3336: if ($numcurrent > 0) {
3337: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3338: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3339: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3340: }
3341: }
3342: }
3343: $hashref->{$key}=$courseinfo.':'.$now;
3344: }
3345: if (&untie_domain_hash($hashref)) {
3346: &Reply( $client, "ok\n", $userinput);
3347: } else {
3348: &Failure($client, "error: ".($!+0)
3349: ." untie(GDBM) Failed ".
3350: "while attempting courseidput\n", $userinput);
3351: }
3352: } else {
3353: &Failure($client, "error: ".($!+0)
3354: ." tie(GDBM) Failed ".
3355: "while attempting courseidput\n", $userinput);
3356: }
3357:
3358: return 1;
3359: }
3360: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3361:
3362: sub put_course_id_hash_handler {
3363: my ($cmd, $tail, $client) = @_;
3364: my $userinput = "$cmd:$tail";
3365: my ($udom,$mode,$what) = split(/:/, $tail,3);
3366: chomp($what);
3367: my $now=time;
3368: my @pairs=split(/\&/,$what);
3369: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3370: if ($hashref) {
3371: foreach my $pair (@pairs) {
3372: my ($key,$value)=split(/=/,$pair);
3373: my $unesc_key = &unescape($key);
3374: if ($mode ne 'timeonly') {
3375: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3376: my $curritems = &Apache::lonnet::thaw_unescape($key);
3377: if (ref($curritems) ne 'HASH') {
3378: my @current_items = split(/:/,$hashref->{$key},-1);
3379: my $lasttime = pop(@current_items);
3380: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3381: } else {
3382: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3383: }
3384: }
3385: $hashref->{$key} = $value;
3386: }
3387: if ($mode ne 'notime') {
3388: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3389: }
3390: }
3391: if (&untie_domain_hash($hashref)) {
3392: &Reply($client, "ok\n", $userinput);
3393: } else {
3394: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3395: "while attempting courseidputhash\n", $userinput);
3396: }
3397: } else {
3398: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3399: "while attempting courseidputhash\n", $userinput);
3400: }
3401: return 1;
3402: }
3403: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3404:
3405: # Retrieves the value of a course id resource keyword pattern
3406: # defined since a starting date. Both the starting date and the
3407: # keyword pattern are optional. If the starting date is not supplied it
3408: # is treated as the beginning of time. If the pattern is not found,
3409: # it is treatred as "." matching everything.
3410: #
3411: # Parameters:
3412: # $cmd - Command keyword that resulted in us being dispatched.
3413: # $tail - The remainder of the command that, in this case, consists
3414: # of a colon separated list of:
3415: # domain - The domain in which the course database is
3416: # defined.
3417: # since - Optional parameter describing the minimum
3418: # time of definition(?) of the resources that
3419: # will match the dump.
3420: # description - regular expression that is used to filter
3421: # the dump. Only keywords matching this regexp
3422: # will be used.
3423: # institutional code - optional supplied code to filter
3424: # the dump. Only courses with an institutional code
3425: # that match the supplied code will be returned.
3426: # owner - optional supplied username and domain of owner to
3427: # filter the dump. Only courses for which the course
3428: # owner matches the supplied username and/or domain
3429: # will be returned. Pre-2.2.0 legacy entries from
3430: # nohist_courseiddump will only contain usernames.
3431: # type - optional parameter for selection
3432: # regexp_ok - if true, allow the supplied institutional code
3433: # filter to behave as a regular expression.
3434: # rtn_as_hash - whether to return the information available for
3435: # each matched item as a frozen hash of all
3436: # key, value pairs in the item's hash, or as a
3437: # colon-separated list of (in order) description,
3438: # institutional code, and course owner.
3439: #
3440: # $client - The socket open on the client.
3441: # Returns:
3442: # 1 - Continue processing.
3443: # Side Effects:
3444: # a reply is written to $client.
3445: sub dump_course_id_handler {
3446: my ($cmd, $tail, $client) = @_;
3447: my $userinput = "$cmd:$tail";
3448:
3449: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3450: $typefilter,$regexp_ok,$rtn_as_hash) =split(/:/,$tail);
3451: if (defined($description)) {
3452: $description=&unescape($description);
3453: } else {
3454: $description='.';
3455: }
3456: if (defined($instcodefilter)) {
3457: $instcodefilter=&unescape($instcodefilter);
3458: } else {
3459: $instcodefilter='.';
3460: }
3461: my ($ownerunamefilter,$ownerdomfilter);
3462: if (defined($ownerfilter)) {
3463: $ownerfilter=&unescape($ownerfilter);
3464: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3465: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3466: $ownerunamefilter = $1;
3467: $ownerdomfilter = $2;
3468: } else {
3469: $ownerunamefilter = $ownerfilter;
3470: $ownerdomfilter = '';
3471: }
3472: }
3473: } else {
3474: $ownerfilter='.';
3475: }
3476:
3477: if (defined($coursefilter)) {
3478: $coursefilter=&unescape($coursefilter);
3479: } else {
3480: $coursefilter='.';
3481: }
3482: if (defined($typefilter)) {
3483: $typefilter=&unescape($typefilter);
3484: } else {
3485: $typefilter='.';
3486: }
3487: if (defined($regexp_ok)) {
3488: $regexp_ok=&unescape($regexp_ok);
3489: }
3490: my $unpack = 1;
3491: if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&
3492: $typefilter eq '.') {
3493: $unpack = 0;
3494: }
3495: if (!defined($since)) { $since=0; }
3496: my $qresult='';
3497: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3498: if ($hashref) {
3499: while (my ($key,$value) = each(%$hashref)) {
3500: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,%unesc_val);
3501: $unesc_key = &unescape($key);
3502: if ($unesc_key =~ /^lasttime:/) {
3503: next;
3504: } else {
3505: $lasttime_key = &escape('lasttime:'.$unesc_key);
3506: }
3507: if ($hashref->{$lasttime_key} ne '') {
3508: $lasttime = $hashref->{$lasttime_key};
3509: next if ($lasttime<$since);
3510: }
3511: my $items = &Apache::lonnet::thaw_unescape($value);
3512: if (ref($items) eq 'HASH') {
3513: $is_hash = 1;
3514: if ($unpack || !$rtn_as_hash) {
3515: $unesc_val{'descr'} = $items->{'description'};
3516: $unesc_val{'inst_code'} = $items->{'inst_code'};
3517: $unesc_val{'owner'} = $items->{'owner'};
3518: $unesc_val{'type'} = $items->{'type'};
3519: }
3520: } else {
3521: $is_hash = 0;
3522: my @courseitems = split(/:/,$value);
3523: $lasttime = pop(@courseitems);
3524: next if ($lasttime<$since);
3525: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
3526: }
3527: my $match = 1;
3528: if ($description ne '.') {
3529: if (!$is_hash) {
3530: $unesc_val{'descr'} = &unescape($val{'descr'});
3531: }
3532: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
3533: $match = 0;
3534: }
3535: }
3536: if ($instcodefilter ne '.') {
3537: if (!$is_hash) {
3538: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
3539: }
3540: if ($regexp_ok) {
3541: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
3542: $match = 0;
3543: }
3544: } else {
3545: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
3546: $match = 0;
3547: }
3548: }
3549: }
3550: if ($ownerfilter ne '.') {
3551: if (!$is_hash) {
3552: $unesc_val{'owner'} = &unescape($val{'owner'});
3553: }
3554: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
3555: if ($unesc_val{'owner'} =~ /:/) {
3556: if (eval{$unesc_val{'owner'} !~
3557: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
3558: $match = 0;
3559: }
3560: } else {
3561: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
3562: $match = 0;
3563: }
3564: }
3565: } elsif ($ownerunamefilter ne '') {
3566: if ($unesc_val{'owner'} =~ /:/) {
3567: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
3568: $match = 0;
3569: }
3570: } else {
3571: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
3572: $match = 0;
3573: }
3574: }
3575: } elsif ($ownerdomfilter ne '') {
3576: if ($unesc_val{'owner'} =~ /:/) {
3577: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
3578: $match = 0;
3579: }
3580: } else {
3581: if ($ownerdomfilter ne $udom) {
3582: $match = 0;
3583: }
3584: }
3585: }
3586: }
3587: if ($coursefilter ne '.') {
3588: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
3589: $match = 0;
3590: }
3591: }
3592: if ($typefilter ne '.') {
3593: if (!$is_hash) {
3594: $unesc_val{'type'} = &unescape($val{'type'});
3595: }
3596: if ($unesc_val{'type'} eq '') {
3597: if ($typefilter ne 'Course') {
3598: $match = 0;
3599: }
3600: } else {
3601: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
3602: $match = 0;
3603: }
3604: }
3605: }
3606: if ($match == 1) {
3607: if ($rtn_as_hash) {
3608: if ($is_hash) {
3609: $qresult.=$key.'='.$value.'&';
3610: } else {
3611: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
3612: 'inst_code' => &unescape($val{'inst_code'}),
3613: 'owner' => &unescape($val{'owner'}),
3614: 'type' => &unescape($val{'type'}),
3615: );
3616: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
3617: $qresult.=$key.'='.$items.'&';
3618: }
3619: } else {
3620: if ($is_hash) {
3621: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
3622: &escape($unesc_val{'inst_code'}).':'.
3623: &escape($unesc_val{'owner'}).'&';
3624: } else {
3625: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
3626: ':'.$val{'owner'}.'&';
3627: }
3628: }
3629: }
3630: }
3631: if (&untie_domain_hash($hashref)) {
3632: chop($qresult);
3633: &Reply($client, \$qresult, $userinput);
3634: } else {
3635: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3636: "while attempting courseiddump\n", $userinput);
3637: }
3638: } else {
3639: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3640: "while attempting courseiddump\n", $userinput);
3641: }
3642: return 1;
3643: }
3644: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
3645:
3646: #
3647: # Puts an unencrypted entry in a namespace db file at the domain level
3648: #
3649: # Parameters:
3650: # $cmd - The command that got us here.
3651: # $tail - Tail of the command (remaining parameters).
3652: # $client - File descriptor connected to client.
3653: # Returns
3654: # 0 - Requested to exit, caller should shut down.
3655: # 1 - Continue processing.
3656: # Side effects:
3657: # reply is written to $client.
3658: #
3659: sub put_domain_handler {
3660: my ($cmd,$tail,$client) = @_;
3661:
3662: my $userinput = "$cmd:$tail";
3663:
3664: my ($udom,$namespace,$what) =split(/:/,$tail,3);
3665: chomp($what);
3666: my @pairs=split(/\&/,$what);
3667: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
3668: "P", $what);
3669: if ($hashref) {
3670: foreach my $pair (@pairs) {
3671: my ($key,$value)=split(/=/,$pair);
3672: $hashref->{$key}=$value;
3673: }
3674: if (&untie_domain_hash($hashref)) {
3675: &Reply($client, "ok\n", $userinput);
3676: } else {
3677: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3678: "while attempting putdom\n", $userinput);
3679: }
3680: } else {
3681: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3682: "while attempting putdom\n", $userinput);
3683: }
3684:
3685: return 1;
3686: }
3687: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
3688:
3689: # Unencrypted get from the namespace database file at the domain level.
3690: # This function retrieves a keyed item from a specific named database in the
3691: # domain directory.
3692: #
3693: # Parameters:
3694: # $cmd - Command request keyword (get).
3695: # $tail - Tail of the command. This is a colon separated list
3696: # consisting of the domain and the 'namespace'
3697: # which selects the gdbm file to do the lookup in,
3698: # & separated list of keys to lookup. Note that
3699: # the values are returned as an & separated list too.
3700: # $client - File descriptor open on the client.
3701: # Returns:
3702: # 1 - Continue processing.
3703: # 0 - Exit.
3704: # Side effects:
3705: # reply is written to $client.
3706: #
3707:
3708: sub get_domain_handler {
3709: my ($cmd, $tail, $client) = @_;
3710:
3711: my $userinput = "$client:$tail";
3712:
3713: my ($udom,$namespace,$what)=split(/:/,$tail,3);
3714: chomp($what);
3715: my @queries=split(/\&/,$what);
3716: my $qresult='';
3717: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
3718: if ($hashref) {
3719: for (my $i=0;$i<=$#queries;$i++) {
3720: $qresult.="$hashref->{$queries[$i]}&";
3721: }
3722: if (&untie_domain_hash($hashref)) {
3723: $qresult=~s/\&$//;
3724: &Reply($client, \$qresult, $userinput);
3725: } else {
3726: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3727: "while attempting getdom\n",$userinput);
3728: }
3729: } else {
3730: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3731: "while attempting getdom\n",$userinput);
3732: }
3733:
3734: return 1;
3735: }
3736: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
3737:
3738:
3739: #
3740: # Puts an id to a domains id database.
3741: #
3742: # Parameters:
3743: # $cmd - The command that triggered us.
3744: # $tail - Remainder of the request other than the command. This is a
3745: # colon separated list containing:
3746: # $domain - The domain for which we are writing the id.
3747: # $pairs - The id info to write... this is and & separated list
3748: # of keyword=value.
3749: # $client - Socket open on the client.
3750: # Returns:
3751: # 1 - Continue processing.
3752: # Side effects:
3753: # reply is written to $client.
3754: #
3755: sub put_id_handler {
3756: my ($cmd,$tail,$client) = @_;
3757:
3758:
3759: my $userinput = "$cmd:$tail";
3760:
3761: my ($udom,$what)=split(/:/,$tail);
3762: chomp($what);
3763: my @pairs=split(/\&/,$what);
3764: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3765: "P", $what);
3766: if ($hashref) {
3767: foreach my $pair (@pairs) {
3768: my ($key,$value)=split(/=/,$pair);
3769: $hashref->{$key}=$value;
3770: }
3771: if (&untie_domain_hash($hashref)) {
3772: &Reply($client, "ok\n", $userinput);
3773: } else {
3774: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3775: "while attempting idput\n", $userinput);
3776: }
3777: } else {
3778: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3779: "while attempting idput\n", $userinput);
3780: }
3781:
3782: return 1;
3783: }
3784: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
3785:
3786: #
3787: # Retrieves a set of id values from the id database.
3788: # Returns an & separated list of results, one for each requested id to the
3789: # client.
3790: #
3791: # Parameters:
3792: # $cmd - Command keyword that caused us to be dispatched.
3793: # $tail - Tail of the command. Consists of a colon separated:
3794: # domain - the domain whose id table we dump
3795: # ids Consists of an & separated list of
3796: # id keywords whose values will be fetched.
3797: # nonexisting keywords will have an empty value.
3798: # $client - Socket open on the client.
3799: #
3800: # Returns:
3801: # 1 - indicating processing should continue.
3802: # Side effects:
3803: # An & separated list of results is written to $client.
3804: #
3805: sub get_id_handler {
3806: my ($cmd, $tail, $client) = @_;
3807:
3808:
3809: my $userinput = "$client:$tail";
3810:
3811: my ($udom,$what)=split(/:/,$tail);
3812: chomp($what);
3813: my @queries=split(/\&/,$what);
3814: my $qresult='';
3815: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3816: if ($hashref) {
3817: for (my $i=0;$i<=$#queries;$i++) {
3818: $qresult.="$hashref->{$queries[$i]}&";
3819: }
3820: if (&untie_domain_hash($hashref)) {
3821: $qresult=~s/\&$//;
3822: &Reply($client, \$qresult, $userinput);
3823: } else {
3824: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3825: "while attempting idget\n",$userinput);
3826: }
3827: } else {
3828: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3829: "while attempting idget\n",$userinput);
3830: }
3831:
3832: return 1;
3833: }
3834: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
3835:
3836: #
3837: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
3838: #
3839: # Parameters
3840: # $cmd - Command keyword that caused us to be dispatched.
3841: # $tail - Tail of the command. Consists of a colon separated:
3842: # domain - the domain whose dcmail we are recording
3843: # email Consists of key=value pair
3844: # where key is unique msgid
3845: # and value is message (in XML)
3846: # $client - Socket open on the client.
3847: #
3848: # Returns:
3849: # 1 - indicating processing should continue.
3850: # Side effects
3851: # reply is written to $client.
3852: #
3853: sub put_dcmail_handler {
3854: my ($cmd,$tail,$client) = @_;
3855: my $userinput = "$cmd:$tail";
3856:
3857: my ($udom,$what)=split(/:/,$tail);
3858: chomp($what);
3859: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3860: if ($hashref) {
3861: my ($key,$value)=split(/=/,$what);
3862: $hashref->{$key}=$value;
3863: }
3864: if (&untie_domain_hash($hashref)) {
3865: &Reply($client, "ok\n", $userinput);
3866: } else {
3867: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3868: "while attempting dcmailput\n", $userinput);
3869: }
3870: return 1;
3871: }
3872: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3873:
3874: #
3875: # Retrieves broadcast e-mail from nohist_dcmail database
3876: # Returns to client an & separated list of key=value pairs,
3877: # where key is msgid and value is message information.
3878: #
3879: # Parameters
3880: # $cmd - Command keyword that caused us to be dispatched.
3881: # $tail - Tail of the command. Consists of a colon separated:
3882: # domain - the domain whose dcmail table we dump
3883: # startfilter - beginning of time window
3884: # endfilter - end of time window
3885: # sendersfilter - & separated list of username:domain
3886: # for senders to search for.
3887: # $client - Socket open on the client.
3888: #
3889: # Returns:
3890: # 1 - indicating processing should continue.
3891: # Side effects
3892: # reply (& separated list of msgid=messageinfo pairs) is
3893: # written to $client.
3894: #
3895: sub dump_dcmail_handler {
3896: my ($cmd, $tail, $client) = @_;
3897:
3898: my $userinput = "$cmd:$tail";
3899: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3900: chomp($sendersfilter);
3901: my @senders = ();
3902: if (defined($startfilter)) {
3903: $startfilter=&unescape($startfilter);
3904: } else {
3905: $startfilter='.';
3906: }
3907: if (defined($endfilter)) {
3908: $endfilter=&unescape($endfilter);
3909: } else {
3910: $endfilter='.';
3911: }
3912: if (defined($sendersfilter)) {
3913: $sendersfilter=&unescape($sendersfilter);
3914: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
3915: }
3916:
3917: my $qresult='';
3918: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3919: if ($hashref) {
3920: while (my ($key,$value) = each(%$hashref)) {
3921: my $match = 1;
3922: my ($timestamp,$subj,$uname,$udom) =
3923: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
3924: $subj = &unescape($subj);
3925: unless ($startfilter eq '.' || !defined($startfilter)) {
3926: if ($timestamp < $startfilter) {
3927: $match = 0;
3928: }
3929: }
3930: unless ($endfilter eq '.' || !defined($endfilter)) {
3931: if ($timestamp > $endfilter) {
3932: $match = 0;
3933: }
3934: }
3935: unless (@senders < 1) {
3936: unless (grep/^$uname:$udom$/,@senders) {
3937: $match = 0;
3938: }
3939: }
3940: if ($match == 1) {
3941: $qresult.=$key.'='.$value.'&';
3942: }
3943: }
3944: if (&untie_domain_hash($hashref)) {
3945: chop($qresult);
3946: &Reply($client, \$qresult, $userinput);
3947: } else {
3948: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3949: "while attempting dcmaildump\n", $userinput);
3950: }
3951: } else {
3952: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3953: "while attempting dcmaildump\n", $userinput);
3954: }
3955: return 1;
3956: }
3957:
3958: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3959:
3960: #
3961: # Puts domain roles in nohist_domainroles database
3962: #
3963: # Parameters
3964: # $cmd - Command keyword that caused us to be dispatched.
3965: # $tail - Tail of the command. Consists of a colon separated:
3966: # domain - the domain whose roles we are recording
3967: # role - Consists of key=value pair
3968: # where key is unique role
3969: # and value is start/end date information
3970: # $client - Socket open on the client.
3971: #
3972: # Returns:
3973: # 1 - indicating processing should continue.
3974: # Side effects
3975: # reply is written to $client.
3976: #
3977:
3978: sub put_domainroles_handler {
3979: my ($cmd,$tail,$client) = @_;
3980:
3981: my $userinput = "$cmd:$tail";
3982: my ($udom,$what)=split(/:/,$tail);
3983: chomp($what);
3984: my @pairs=split(/\&/,$what);
3985: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3986: if ($hashref) {
3987: foreach my $pair (@pairs) {
3988: my ($key,$value)=split(/=/,$pair);
3989: $hashref->{$key}=$value;
3990: }
3991: if (&untie_domain_hash($hashref)) {
3992: &Reply($client, "ok\n", $userinput);
3993: } else {
3994: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3995: "while attempting domroleput\n", $userinput);
3996: }
3997: } else {
3998: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3999: "while attempting domroleput\n", $userinput);
4000: }
4001:
4002: return 1;
4003: }
4004:
4005: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4006:
4007: #
4008: # Retrieves domain roles from nohist_domainroles database
4009: # Returns to client an & separated list of key=value pairs,
4010: # where key is role and value is start and end date information.
4011: #
4012: # Parameters
4013: # $cmd - Command keyword that caused us to be dispatched.
4014: # $tail - Tail of the command. Consists of a colon separated:
4015: # domain - the domain whose domain roles table we dump
4016: # $client - Socket open on the client.
4017: #
4018: # Returns:
4019: # 1 - indicating processing should continue.
4020: # Side effects
4021: # reply (& separated list of role=start/end info pairs) is
4022: # written to $client.
4023: #
4024: sub dump_domainroles_handler {
4025: my ($cmd, $tail, $client) = @_;
4026:
4027: my $userinput = "$cmd:$tail";
4028: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4029: chomp($rolesfilter);
4030: my @roles = ();
4031: if (defined($startfilter)) {
4032: $startfilter=&unescape($startfilter);
4033: } else {
4034: $startfilter='.';
4035: }
4036: if (defined($endfilter)) {
4037: $endfilter=&unescape($endfilter);
4038: } else {
4039: $endfilter='.';
4040: }
4041: if (defined($rolesfilter)) {
4042: $rolesfilter=&unescape($rolesfilter);
4043: @roles = split(/\&/,$rolesfilter);
4044: }
4045:
4046: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4047: if ($hashref) {
4048: my $qresult = '';
4049: while (my ($key,$value) = each(%$hashref)) {
4050: my $match = 1;
4051: my ($start,$end) = split(/:/,&unescape($value));
4052: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
4053: unless ($startfilter eq '.' || !defined($startfilter)) {
4054: if ($start >= $startfilter) {
4055: $match = 0;
4056: }
4057: }
4058: unless ($endfilter eq '.' || !defined($endfilter)) {
4059: if ($end <= $endfilter) {
4060: $match = 0;
4061: }
4062: }
4063: unless (@roles < 1) {
4064: unless (grep/^\Q$trole\E$/,@roles) {
4065: $match = 0;
4066: }
4067: }
4068: if ($match == 1) {
4069: $qresult.=$key.'='.$value.'&';
4070: }
4071: }
4072: if (&untie_domain_hash($hashref)) {
4073: chop($qresult);
4074: &Reply($client, \$qresult, $userinput);
4075: } else {
4076: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4077: "while attempting domrolesdump\n", $userinput);
4078: }
4079: } else {
4080: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4081: "while attempting domrolesdump\n", $userinput);
4082: }
4083: return 1;
4084: }
4085:
4086: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4087:
4088:
4089: # Process the tmpput command I'm not sure what this does.. Seems to
4090: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4091: # where Id is the client's ip concatenated with a sequence number.
4092: # The file will contain some value that is passed in. Is this e.g.
4093: # a login token?
4094: #
4095: # Parameters:
4096: # $cmd - The command that got us dispatched.
4097: # $tail - The remainder of the request following $cmd:
4098: # In this case this will be the contents of the file.
4099: # $client - Socket connected to the client.
4100: # Returns:
4101: # 1 indicating processing can continue.
4102: # Side effects:
4103: # A file is created in the local filesystem.
4104: # A reply is sent to the client.
4105: sub tmp_put_handler {
4106: my ($cmd, $what, $client) = @_;
4107:
4108: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4109:
4110: my ($record,$context) = split(/:/,$what);
4111: if ($context ne '') {
4112: chomp($context);
4113: $context = &unescape($context);
4114: }
4115: my ($id,$store);
4116: $tmpsnum++;
4117: if ($context eq 'resetpw') {
4118: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4119: } else {
4120: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4121: }
4122: $id=~s/\W/\_/g;
4123: $record=~s/\n//g;
4124: my $execdir=$perlvar{'lonDaemons'};
4125: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
4126: print $store $record;
4127: close $store;
4128: &Reply($client, \$id, $userinput);
4129: } else {
4130: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4131: "while attempting tmpput\n", $userinput);
4132: }
4133: return 1;
4134:
4135: }
4136: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
4137:
4138: # Processes the tmpget command. This command returns the contents
4139: # of a temporary resource file(?) created via tmpput.
4140: #
4141: # Paramters:
4142: # $cmd - Command that got us dispatched.
4143: # $id - Tail of the command, contain the id of the resource
4144: # we want to fetch.
4145: # $client - socket open on the client.
4146: # Return:
4147: # 1 - Inidcating processing can continue.
4148: # Side effects:
4149: # A reply is sent to the client.
4150: #
4151: sub tmp_get_handler {
4152: my ($cmd, $id, $client) = @_;
4153:
4154: my $userinput = "$cmd:$id";
4155:
4156:
4157: $id=~s/\W/\_/g;
4158: my $store;
4159: my $execdir=$perlvar{'lonDaemons'};
4160: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4161: my $reply=<$store>;
4162: &Reply( $client, \$reply, $userinput);
4163: close $store;
4164: } else {
4165: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4166: "while attempting tmpget\n", $userinput);
4167: }
4168:
4169: return 1;
4170: }
4171: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
4172:
4173: #
4174: # Process the tmpdel command. This command deletes a temp resource
4175: # created by the tmpput command.
4176: #
4177: # Parameters:
4178: # $cmd - Command that got us here.
4179: # $id - Id of the temporary resource created.
4180: # $client - socket open on the client process.
4181: #
4182: # Returns:
4183: # 1 - Indicating processing should continue.
4184: # Side Effects:
4185: # A file is deleted
4186: # A reply is sent to the client.
4187: sub tmp_del_handler {
4188: my ($cmd, $id, $client) = @_;
4189:
4190: my $userinput= "$cmd:$id";
4191:
4192: chomp($id);
4193: $id=~s/\W/\_/g;
4194: my $execdir=$perlvar{'lonDaemons'};
4195: if (unlink("$execdir/tmp/$id.tmp")) {
4196: &Reply($client, "ok\n", $userinput);
4197: } else {
4198: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4199: "while attempting tmpdel\n", $userinput);
4200: }
4201:
4202: return 1;
4203:
4204: }
4205: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
4206:
4207: #
4208: # Processes the setannounce command. This command
4209: # creates a file named announce.txt in the top directory of
4210: # the documentn root and sets its contents. The announce.txt file is
4211: # printed in its entirety at the LonCAPA login page. Note:
4212: # once the announcement.txt fileis created it cannot be deleted.
4213: # However, setting the contents of the file to empty removes the
4214: # announcement from the login page of loncapa so who cares.
4215: #
4216: # Parameters:
4217: # $cmd - The command that got us dispatched.
4218: # $announcement - The text of the announcement.
4219: # $client - Socket open on the client process.
4220: # Retunrns:
4221: # 1 - Indicating request processing should continue
4222: # Side Effects:
4223: # The file {DocRoot}/announcement.txt is created.
4224: # A reply is sent to $client.
4225: #
4226: sub set_announce_handler {
4227: my ($cmd, $announcement, $client) = @_;
4228:
4229: my $userinput = "$cmd:$announcement";
4230:
4231: chomp($announcement);
4232: $announcement=&unescape($announcement);
4233: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4234: '/announcement.txt')) {
4235: print $store $announcement;
4236: close $store;
4237: &Reply($client, "ok\n", $userinput);
4238: } else {
4239: &Failure($client, "error: ".($!+0)."\n", $userinput);
4240: }
4241:
4242: return 1;
4243: }
4244: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
4245:
4246: #
4247: # Return the version of the daemon. This can be used to determine
4248: # the compatibility of cross version installations or, alternatively to
4249: # simply know who's out of date and who isn't. Note that the version
4250: # is returned concatenated with the tail.
4251: # Parameters:
4252: # $cmd - the request that dispatched to us.
4253: # $tail - Tail of the request (client's version?).
4254: # $client - Socket open on the client.
4255: #Returns:
4256: # 1 - continue processing requests.
4257: # Side Effects:
4258: # Replies with version to $client.
4259: sub get_version_handler {
4260: my ($cmd, $tail, $client) = @_;
4261:
4262: my $userinput = $cmd.$tail;
4263:
4264: &Reply($client, &version($userinput)."\n", $userinput);
4265:
4266:
4267: return 1;
4268: }
4269: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
4270:
4271: # Set the current host and domain. This is used to support
4272: # multihomed systems. Each IP of the system, or even separate daemons
4273: # on the same IP can be treated as handling a separate lonCAPA virtual
4274: # machine. This command selects the virtual lonCAPA. The client always
4275: # knows the right one since it is lonc and it is selecting the domain/system
4276: # from the hosts.tab file.
4277: # Parameters:
4278: # $cmd - Command that dispatched us.
4279: # $tail - Tail of the command (domain/host requested).
4280: # $socket - Socket open on the client.
4281: #
4282: # Returns:
4283: # 1 - Indicates the program should continue to process requests.
4284: # Side-effects:
4285: # The default domain/system context is modified for this daemon.
4286: # a reply is sent to the client.
4287: #
4288: sub set_virtual_host_handler {
4289: my ($cmd, $tail, $socket) = @_;
4290:
4291: my $userinput ="$cmd:$tail";
4292:
4293: &Reply($client, &sethost($userinput)."\n", $userinput);
4294:
4295:
4296: return 1;
4297: }
4298: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
4299:
4300: # Process a request to exit:
4301: # - "bye" is sent to the client.
4302: # - The client socket is shutdown and closed.
4303: # - We indicate to the caller that we should exit.
4304: # Formal Parameters:
4305: # $cmd - The command that got us here.
4306: # $tail - Tail of the command (empty).
4307: # $client - Socket open on the tail.
4308: # Returns:
4309: # 0 - Indicating the program should exit!!
4310: #
4311: sub exit_handler {
4312: my ($cmd, $tail, $client) = @_;
4313:
4314: my $userinput = "$cmd:$tail";
4315:
4316: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4317: &Reply($client, "bye\n", $userinput);
4318: $client->shutdown(2); # shutdown the socket forcibly.
4319: $client->close();
4320:
4321: return 0;
4322: }
4323: ®ister_handler("exit", \&exit_handler, 0,1,1);
4324: ®ister_handler("init", \&exit_handler, 0,1,1);
4325: ®ister_handler("quit", \&exit_handler, 0,1,1);
4326:
4327: # Determine if auto-enrollment is enabled.
4328: # Note that the original had what I believe to be a defect.
4329: # The original returned 0 if the requestor was not a registerd client.
4330: # It should return "refused".
4331: # Formal Parameters:
4332: # $cmd - The command that invoked us.
4333: # $tail - The tail of the command (Extra command parameters.
4334: # $client - The socket open on the client that issued the request.
4335: # Returns:
4336: # 1 - Indicating processing should continue.
4337: #
4338: sub enrollment_enabled_handler {
4339: my ($cmd, $tail, $client) = @_;
4340: my $userinput = $cmd.":".$tail; # For logging purposes.
4341:
4342:
4343: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4344:
4345: my $outcome = &localenroll::run($cdom);
4346: &Reply($client, \$outcome, $userinput);
4347:
4348: return 1;
4349: }
4350: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4351:
4352: # Get the official sections for which auto-enrollment is possible.
4353: # Since the admin people won't know about 'unofficial sections'
4354: # we cannot auto-enroll on them.
4355: # Formal Parameters:
4356: # $cmd - The command request that got us dispatched here.
4357: # $tail - The remainder of the request. In our case this
4358: # will be split into:
4359: # $coursecode - The course name from the admin point of view.
4360: # $cdom - The course's domain(?).
4361: # $client - Socket open on the client.
4362: # Returns:
4363: # 1 - Indiciting processing should continue.
4364: #
4365: sub get_sections_handler {
4366: my ($cmd, $tail, $client) = @_;
4367: my $userinput = "$cmd:$tail";
4368:
4369: my ($coursecode, $cdom) = split(/:/, $tail);
4370: my @secs = &localenroll::get_sections($coursecode,$cdom);
4371: my $seclist = &escape(join(':',@secs));
4372:
4373: &Reply($client, \$seclist, $userinput);
4374:
4375:
4376: return 1;
4377: }
4378: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4379:
4380: # Validate the owner of a new course section.
4381: #
4382: # Formal Parameters:
4383: # $cmd - Command that got us dispatched.
4384: # $tail - the remainder of the command. For us this consists of a
4385: # colon separated string containing:
4386: # $inst - Course Id from the institutions point of view.
4387: # $owner - Proposed owner of the course.
4388: # $cdom - Domain of the course (from the institutions
4389: # point of view?)..
4390: # $client - Socket open on the client.
4391: #
4392: # Returns:
4393: # 1 - Processing should continue.
4394: #
4395: sub validate_course_owner_handler {
4396: my ($cmd, $tail, $client) = @_;
4397: my $userinput = "$cmd:$tail";
4398: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4399:
4400: $owner = &unescape($owner);
4401: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4402: &Reply($client, \$outcome, $userinput);
4403:
4404:
4405:
4406: return 1;
4407: }
4408: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
4409:
4410: #
4411: # Validate a course section in the official schedule of classes
4412: # from the institutions point of view (part of autoenrollment).
4413: #
4414: # Formal Parameters:
4415: # $cmd - The command request that got us dispatched.
4416: # $tail - The tail of the command. In this case,
4417: # this is a colon separated set of words that will be split
4418: # into:
4419: # $inst_course_id - The course/section id from the
4420: # institutions point of view.
4421: # $cdom - The domain from the institutions
4422: # point of view.
4423: # $client - Socket open on the client.
4424: # Returns:
4425: # 1 - Indicating processing should continue.
4426: #
4427: sub validate_course_section_handler {
4428: my ($cmd, $tail, $client) = @_;
4429: my $userinput = "$cmd:$tail";
4430: my ($inst_course_id, $cdom) = split(/:/, $tail);
4431:
4432: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4433: &Reply($client, \$outcome, $userinput);
4434:
4435:
4436: return 1;
4437: }
4438: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4439:
4440: #
4441: # Validate course owner's access to enrollment data for specific class section.
4442: #
4443: #
4444: # Formal Parameters:
4445: # $cmd - The command request that got us dispatched.
4446: # $tail - The tail of the command. In this case this is a colon separated
4447: # set of words that will be split into:
4448: # $inst_class - Institutional code for the specific class section
4449: # $courseowner - The escaped username:domain of the course owner
4450: # $cdom - The domain of the course from the institution's
4451: # point of view.
4452: # $client - The socket open on the client.
4453: # Returns:
4454: # 1 - continue processing.
4455: #
4456:
4457: sub validate_class_access_handler {
4458: my ($cmd, $tail, $client) = @_;
4459: my $userinput = "$cmd:$tail";
4460: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
4461: my $owners = &unescape($ownerlist);
4462: my $outcome;
4463: eval {
4464: local($SIG{__DIE__})='DEFAULT';
4465: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
4466: };
4467: &Reply($client,\$outcome, $userinput);
4468:
4469: return 1;
4470: }
4471: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
4472:
4473: #
4474: # Create a password for a new LON-CAPA user added by auto-enrollment.
4475: # Only used for case where authentication method for new user is localauth
4476: #
4477: # Formal Parameters:
4478: # $cmd - The command request that got us dispatched.
4479: # $tail - The tail of the command. In this case this is a colon separated
4480: # set of words that will be split into:
4481: # $authparam - An authentication parameter (localauth parameter).
4482: # $cdom - The domain of the course from the institution's
4483: # point of view.
4484: # $client - The socket open on the client.
4485: # Returns:
4486: # 1 - continue processing.
4487: #
4488: sub create_auto_enroll_password_handler {
4489: my ($cmd, $tail, $client) = @_;
4490: my $userinput = "$cmd:$tail";
4491:
4492: my ($authparam, $cdom) = split(/:/, $userinput);
4493:
4494: my ($create_passwd,$authchk);
4495: ($authparam,
4496: $create_passwd,
4497: $authchk) = &localenroll::create_password($authparam,$cdom);
4498:
4499: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4500: $userinput);
4501:
4502:
4503: return 1;
4504: }
4505: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4506: 0, 1, 0);
4507:
4508: # Retrieve and remove temporary files created by/during autoenrollment.
4509: #
4510: # Formal Parameters:
4511: # $cmd - The command that got us dispatched.
4512: # $tail - The tail of the command. In our case this is a colon
4513: # separated list that will be split into:
4514: # $filename - The name of the file to remove.
4515: # The filename is given as a path relative to
4516: # the LonCAPA temp file directory.
4517: # $client - Socket open on the client.
4518: #
4519: # Returns:
4520: # 1 - Continue processing.
4521: sub retrieve_auto_file_handler {
4522: my ($cmd, $tail, $client) = @_;
4523: my $userinput = "cmd:$tail";
4524:
4525: my ($filename) = split(/:/, $tail);
4526:
4527: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4528: if ( (-e $source) && ($filename ne '') ) {
4529: my $reply = '';
4530: if (open(my $fh,$source)) {
4531: while (<$fh>) {
4532: chomp($_);
4533: $_ =~ s/^\s+//g;
4534: $_ =~ s/\s+$//g;
4535: $reply .= $_;
4536: }
4537: close($fh);
4538: &Reply($client, &escape($reply)."\n", $userinput);
4539:
4540: # Does this have to be uncommented??!? (RF).
4541: #
4542: # unlink($source);
4543: } else {
4544: &Failure($client, "error\n", $userinput);
4545: }
4546: } else {
4547: &Failure($client, "error\n", $userinput);
4548: }
4549:
4550:
4551: return 1;
4552: }
4553: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4554:
4555: #
4556: # Read and retrieve institutional code format (for support form).
4557: # Formal Parameters:
4558: # $cmd - Command that dispatched us.
4559: # $tail - Tail of the command. In this case it conatins
4560: # the course domain and the coursename.
4561: # $client - Socket open on the client.
4562: # Returns:
4563: # 1 - Continue processing.
4564: #
4565: sub get_institutional_code_format_handler {
4566: my ($cmd, $tail, $client) = @_;
4567: my $userinput = "$cmd:$tail";
4568:
4569: my $reply;
4570: my($cdom,$course) = split(/:/,$tail);
4571: my @pairs = split/\&/,$course;
4572: my %instcodes = ();
4573: my %codes = ();
4574: my @codetitles = ();
4575: my %cat_titles = ();
4576: my %cat_order = ();
4577: foreach (@pairs) {
4578: my ($key,$value) = split/=/,$_;
4579: $instcodes{&unescape($key)} = &unescape($value);
4580: }
4581: my $formatreply = &localenroll::instcode_format($cdom,
4582: \%instcodes,
4583: \%codes,
4584: \@codetitles,
4585: \%cat_titles,
4586: \%cat_order);
4587: if ($formatreply eq 'ok') {
4588: my $codes_str = &Apache::lonnet::hash2str(%codes);
4589: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
4590: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
4591: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
4592: &Reply($client,
4593: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4594: .$cat_order_str."\n",
4595: $userinput);
4596: } else {
4597: # this else branch added by RF since if not ok, lonc will
4598: # hang waiting on reply until timeout.
4599: #
4600: &Reply($client, "format_error\n", $userinput);
4601: }
4602:
4603: return 1;
4604: }
4605: ®ister_handler("autoinstcodeformat",
4606: \&get_institutional_code_format_handler,0,1,0);
4607:
4608: sub get_institutional_defaults_handler {
4609: my ($cmd, $tail, $client) = @_;
4610: my $userinput = "$cmd:$tail";
4611:
4612: my $dom = $tail;
4613: my %defaults_hash;
4614: my @code_order;
4615: my $outcome;
4616: eval {
4617: local($SIG{__DIE__})='DEFAULT';
4618: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
4619: \@code_order);
4620: };
4621: if (!$@) {
4622: if ($outcome eq 'ok') {
4623: my $result='';
4624: while (my ($key,$value) = each(%defaults_hash)) {
4625: $result.=&escape($key).'='.&escape($value).'&';
4626: }
4627: $result .= 'code_order='.&escape(join('&',@code_order));
4628: &Reply($client,\$result,$userinput);
4629: } else {
4630: &Reply($client,"error\n", $userinput);
4631: }
4632: } else {
4633: &Failure($client,"unknown_cmd\n",$userinput);
4634: }
4635: }
4636: ®ister_handler("autoinstcodedefaults",
4637: \&get_institutional_defaults_handler,0,1,0);
4638:
4639: sub get_institutional_user_rules {
4640: my ($cmd, $tail, $client) = @_;
4641: my $userinput = "$cmd:$tail";
4642: my $dom = &unescape($tail);
4643: my (%rules_hash,@rules_order);
4644: my $outcome;
4645: eval {
4646: local($SIG{__DIE__})='DEFAULT';
4647: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
4648: };
4649: if (!$@) {
4650: if ($outcome eq 'ok') {
4651: my $result;
4652: foreach my $key (keys(%rules_hash)) {
4653: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
4654: }
4655: $result =~ s/\&$//;
4656: $result .= ':';
4657: if (@rules_order > 0) {
4658: foreach my $item (@rules_order) {
4659: $result .= &escape($item).'&';
4660: }
4661: }
4662: $result =~ s/\&$//;
4663: &Reply($client,\$result,$userinput);
4664: } else {
4665: &Reply($client,"error\n", $userinput);
4666: }
4667: } else {
4668: &Failure($client,"unknown_cmd\n",$userinput);
4669: }
4670: }
4671: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
4672:
4673: sub get_institutional_id_rules {
4674: my ($cmd, $tail, $client) = @_;
4675: my $userinput = "$cmd:$tail";
4676: my $dom = &unescape($tail);
4677: my (%rules_hash,@rules_order);
4678: my $outcome;
4679: eval {
4680: local($SIG{__DIE__})='DEFAULT';
4681: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
4682: };
4683: if (!$@) {
4684: if ($outcome eq 'ok') {
4685: my $result;
4686: foreach my $key (keys(%rules_hash)) {
4687: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
4688: }
4689: $result =~ s/\&$//;
4690: $result .= ':';
4691: if (@rules_order > 0) {
4692: foreach my $item (@rules_order) {
4693: $result .= &escape($item).'&';
4694: }
4695: }
4696: $result =~ s/\&$//;
4697: &Reply($client,\$result,$userinput);
4698: } else {
4699: &Reply($client,"error\n", $userinput);
4700: }
4701: } else {
4702: &Failure($client,"unknown_cmd\n",$userinput);
4703: }
4704: }
4705: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
4706:
4707:
4708: sub institutional_username_check {
4709: my ($cmd, $tail, $client) = @_;
4710: my $userinput = "$cmd:$tail";
4711: my %rulecheck;
4712: my $outcome;
4713: my ($udom,$uname,@rules) = split(/:/,$tail);
4714: $udom = &unescape($udom);
4715: $uname = &unescape($uname);
4716: @rules = map {&unescape($_);} (@rules);
4717: eval {
4718: local($SIG{__DIE__})='DEFAULT';
4719: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
4720: };
4721: if (!$@) {
4722: if ($outcome eq 'ok') {
4723: my $result='';
4724: foreach my $key (keys(%rulecheck)) {
4725: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
4726: }
4727: &Reply($client,\$result,$userinput);
4728: } else {
4729: &Reply($client,"error\n", $userinput);
4730: }
4731: } else {
4732: &Failure($client,"unknown_cmd\n",$userinput);
4733: }
4734: }
4735: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
4736:
4737: sub institutional_id_check {
4738: my ($cmd, $tail, $client) = @_;
4739: my $userinput = "$cmd:$tail";
4740: my %rulecheck;
4741: my $outcome;
4742: my ($udom,$id,@rules) = split(/:/,$tail);
4743: $udom = &unescape($udom);
4744: $id = &unescape($id);
4745: @rules = map {&unescape($_);} (@rules);
4746: eval {
4747: local($SIG{__DIE__})='DEFAULT';
4748: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
4749: };
4750: if (!$@) {
4751: if ($outcome eq 'ok') {
4752: my $result='';
4753: foreach my $key (keys(%rulecheck)) {
4754: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
4755: }
4756: &Reply($client,\$result,$userinput);
4757: } else {
4758: &Reply($client,"error\n", $userinput);
4759: }
4760: } else {
4761: &Failure($client,"unknown_cmd\n",$userinput);
4762: }
4763: }
4764: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
4765:
4766: # Get domain specific conditions for import of student photographs to a course
4767: #
4768: # Retrieves information from photo_permission subroutine in localenroll.
4769: # Returns outcome (ok) if no processing errors, and whether course owner is
4770: # required to accept conditions of use (yes/no).
4771: #
4772: #
4773: sub photo_permission_handler {
4774: my ($cmd, $tail, $client) = @_;
4775: my $userinput = "$cmd:$tail";
4776: my $cdom = $tail;
4777: my ($perm_reqd,$conditions);
4778: my $outcome;
4779: eval {
4780: local($SIG{__DIE__})='DEFAULT';
4781: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
4782: \$conditions);
4783: };
4784: if (!$@) {
4785: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
4786: $userinput);
4787: } else {
4788: &Failure($client,"unknown_cmd\n",$userinput);
4789: }
4790: return 1;
4791: }
4792: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
4793:
4794: #
4795: # Checks if student photo is available for a user in the domain, in the user's
4796: # directory (in /userfiles/internal/studentphoto.jpg).
4797: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
4798: # the student's photo.
4799:
4800: sub photo_check_handler {
4801: my ($cmd, $tail, $client) = @_;
4802: my $userinput = "$cmd:$tail";
4803: my ($udom,$uname,$pid) = split(/:/,$tail);
4804: $udom = &unescape($udom);
4805: $uname = &unescape($uname);
4806: $pid = &unescape($pid);
4807: my $path=&propath($udom,$uname).'/userfiles/internal/';
4808: if (!-e $path) {
4809: &mkpath($path);
4810: }
4811: my $response;
4812: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
4813: $result .= ':'.$response;
4814: &Reply($client, &escape($result)."\n",$userinput);
4815: return 1;
4816: }
4817: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
4818:
4819: #
4820: # Retrieve information from localenroll about whether to provide a button
4821: # for users who have enbled import of student photos to initiate an
4822: # update of photo files for registered students. Also include
4823: # comment to display alongside button.
4824:
4825: sub photo_choice_handler {
4826: my ($cmd, $tail, $client) = @_;
4827: my $userinput = "$cmd:$tail";
4828: my $cdom = &unescape($tail);
4829: my ($update,$comment);
4830: eval {
4831: local($SIG{__DIE__})='DEFAULT';
4832: ($update,$comment) = &localenroll::manager_photo_update($cdom);
4833: };
4834: if (!$@) {
4835: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
4836: } else {
4837: &Failure($client,"unknown_cmd\n",$userinput);
4838: }
4839: return 1;
4840: }
4841: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
4842:
4843: #
4844: # Gets a student's photo to exist (in the correct image type) in the user's
4845: # directory.
4846: # Formal Parameters:
4847: # $cmd - The command request that got us dispatched.
4848: # $tail - A colon separated set of words that will be split into:
4849: # $domain - student's domain
4850: # $uname - student username
4851: # $type - image type desired
4852: # $client - The socket open on the client.
4853: # Returns:
4854: # 1 - continue processing.
4855:
4856: sub student_photo_handler {
4857: my ($cmd, $tail, $client) = @_;
4858: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
4859:
4860: my $path=&propath($domain,$uname). '/userfiles/internal/';
4861: my $filename = 'studentphoto.'.$ext;
4862: if ($type eq 'thumbnail') {
4863: $filename = 'studentphoto_tn.'.$ext;
4864: }
4865: if (-e $path.$filename) {
4866: &Reply($client,"ok\n","$cmd:$tail");
4867: return 1;
4868: }
4869: &mkpath($path);
4870: my $file;
4871: if ($type eq 'thumbnail') {
4872: eval {
4873: local($SIG{__DIE__})='DEFAULT';
4874: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
4875: };
4876: } else {
4877: $file=&localstudentphoto::fetch($domain,$uname);
4878: }
4879: if (!$file) {
4880: &Failure($client,"unavailable\n","$cmd:$tail");
4881: return 1;
4882: }
4883: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
4884: if (-e $path.$filename) {
4885: &Reply($client,"ok\n","$cmd:$tail");
4886: return 1;
4887: }
4888: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4889: return 1;
4890: }
4891: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
4892:
4893: sub inst_usertypes_handler {
4894: my ($cmd, $domain, $client) = @_;
4895: my $res;
4896: my $userinput = $cmd.":".$domain; # For logging purposes.
4897: my (%typeshash,@order,$result);
4898: eval {
4899: local($SIG{__DIE__})='DEFAULT';
4900: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
4901: };
4902: if ($result eq 'ok') {
4903: if (keys(%typeshash) > 0) {
4904: foreach my $key (keys(%typeshash)) {
4905: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
4906: }
4907: }
4908: $res=~s/\&$//;
4909: $res .= ':';
4910: if (@order > 0) {
4911: foreach my $item (@order) {
4912: $res .= &escape($item).'&';
4913: }
4914: }
4915: $res=~s/\&$//;
4916: }
4917: &Reply($client, \$res, $userinput);
4918: return 1;
4919: }
4920: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
4921:
4922: # mkpath makes all directories for a file, expects an absolute path with a
4923: # file or a trailing / if just a dir is passed
4924: # returns 1 on success 0 on failure
4925: sub mkpath {
4926: my ($file)=@_;
4927: my @parts=split(/\//,$file,-1);
4928: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4929: for (my $i=3;$i<= ($#parts-1);$i++) {
4930: $now.='/'.$parts[$i];
4931: if (!-e $now) {
4932: if (!mkdir($now,0770)) { return 0; }
4933: }
4934: }
4935: return 1;
4936: }
4937:
4938: #---------------------------------------------------------------
4939: #
4940: # Getting, decoding and dispatching requests:
4941: #
4942: #
4943: # Get a Request:
4944: # Gets a Request message from the client. The transaction
4945: # is defined as a 'line' of text. We remove the new line
4946: # from the text line.
4947: #
4948: sub get_request {
4949: my $input = <$client>;
4950: chomp($input);
4951:
4952: &Debug("get_request: Request = $input\n");
4953:
4954: &status('Processing '.$clientname.':'.$input);
4955:
4956: return $input;
4957: }
4958: #---------------------------------------------------------------
4959: #
4960: # Process a request. This sub should shrink as each action
4961: # gets farmed out into a separat sub that is registered
4962: # with the dispatch hash.
4963: #
4964: # Parameters:
4965: # user_input - The request received from the client (lonc).
4966: # Returns:
4967: # true to keep processing, false if caller should exit.
4968: #
4969: sub process_request {
4970: my ($userinput) = @_; # Easier for now to break style than to
4971: # fix all the userinput -> user_input.
4972: my $wasenc = 0; # True if request was encrypted.
4973: # ------------------------------------------------------------ See if encrypted
4974: # for command
4975: # sethost:<server>
4976: # <command>:<args>
4977: # we just send it to the processor
4978: # for
4979: # sethost:<server>:<command>:<args>
4980: # we do the implict set host and then do the command
4981: if ($userinput =~ /^sethost:/) {
4982: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
4983: if (defined($userinput)) {
4984: &sethost("$cmd:$newid");
4985: } else {
4986: $userinput = "$cmd:$newid";
4987: }
4988: }
4989:
4990: if ($userinput =~ /^enc/) {
4991: $userinput = decipher($userinput);
4992: $wasenc=1;
4993: if(!$userinput) { # Cipher not defined.
4994: &Failure($client, "error: Encrypted data without negotated key\n");
4995: return 0;
4996: }
4997: }
4998: Debug("process_request: $userinput\n");
4999:
5000: #
5001: # The 'correct way' to add a command to lond is now to
5002: # write a sub to execute it and Add it to the command dispatch
5003: # hash via a call to register_handler.. The comments to that
5004: # sub should give you enough to go on to show how to do this
5005: # along with the examples that are building up as this code
5006: # is getting refactored. Until all branches of the
5007: # if/elseif monster below have been factored out into
5008: # separate procesor subs, if the dispatch hash is missing
5009: # the command keyword, we will fall through to the remainder
5010: # of the if/else chain below in order to keep this thing in
5011: # working order throughout the transmogrification.
5012:
5013: my ($command, $tail) = split(/:/, $userinput, 2);
5014: chomp($command);
5015: chomp($tail);
5016: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
5017: $command =~ s/(\r)//; # And this too for parameterless commands.
5018: if(!$tail) {
5019: $tail =""; # defined but blank.
5020: }
5021:
5022: &Debug("Command received: $command, encoded = $wasenc");
5023:
5024: if(defined $Dispatcher{$command}) {
5025:
5026: my $dispatch_info = $Dispatcher{$command};
5027: my $handler = $$dispatch_info[0];
5028: my $need_encode = $$dispatch_info[1];
5029: my $client_types = $$dispatch_info[2];
5030: Debug("Matched dispatch hash: mustencode: $need_encode "
5031: ."ClientType $client_types");
5032:
5033: # Validate the request:
5034:
5035: my $ok = 1;
5036: my $requesterprivs = 0;
5037: if(&isClient()) {
5038: $requesterprivs |= $CLIENT_OK;
5039: }
5040: if(&isManager()) {
5041: $requesterprivs |= $MANAGER_OK;
5042: }
5043: if($need_encode && (!$wasenc)) {
5044: Debug("Must encode but wasn't: $need_encode $wasenc");
5045: $ok = 0;
5046: }
5047: if(($client_types & $requesterprivs) == 0) {
5048: Debug("Client not privileged to do this operation");
5049: $ok = 0;
5050: }
5051:
5052: if($ok) {
5053: Debug("Dispatching to handler $command $tail");
5054: my $keep_going = &$handler($command, $tail, $client);
5055: return $keep_going;
5056: } else {
5057: Debug("Refusing to dispatch because client did not match requirements");
5058: Failure($client, "refused\n", $userinput);
5059: return 1;
5060: }
5061:
5062: }
5063:
5064: print $client "unknown_cmd\n";
5065: # -------------------------------------------------------------------- complete
5066: Debug("process_request - returning 1");
5067: return 1;
5068: }
5069: #
5070: # Decipher encoded traffic
5071: # Parameters:
5072: # input - Encoded data.
5073: # Returns:
5074: # Decoded data or undef if encryption key was not yet negotiated.
5075: # Implicit input:
5076: # cipher - This global holds the negotiated encryption key.
5077: #
5078: sub decipher {
5079: my ($input) = @_;
5080: my $output = '';
5081:
5082:
5083: if($cipher) {
5084: my($enc, $enclength, $encinput) = split(/:/, $input);
5085: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5086: $output .=
5087: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5088: }
5089: return substr($output, 0, $enclength);
5090: } else {
5091: return undef;
5092: }
5093: }
5094:
5095: #
5096: # Register a command processor. This function is invoked to register a sub
5097: # to process a request. Once registered, the ProcessRequest sub can automatically
5098: # dispatch requests to an appropriate sub, and do the top level validity checking
5099: # as well:
5100: # - Is the keyword recognized.
5101: # - Is the proper client type attempting the request.
5102: # - Is the request encrypted if it has to be.
5103: # Parameters:
5104: # $request_name - Name of the request being registered.
5105: # This is the command request that will match
5106: # against the hash keywords to lookup the information
5107: # associated with the dispatch information.
5108: # $procedure - Reference to a sub to call to process the request.
5109: # All subs get called as follows:
5110: # Procedure($cmd, $tail, $replyfd, $key)
5111: # $cmd - the actual keyword that invoked us.
5112: # $tail - the tail of the request that invoked us.
5113: # $replyfd- File descriptor connected to the client
5114: # $must_encode - True if the request must be encoded to be good.
5115: # $client_ok - True if it's ok for a client to request this.
5116: # $manager_ok - True if it's ok for a manager to request this.
5117: # Side effects:
5118: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5119: # - On failure, the program will die as it's a bad internal bug to try to
5120: # register a duplicate command handler.
5121: #
5122: sub register_handler {
5123: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
5124:
5125: # Don't allow duplication#
5126:
5127: if (defined $Dispatcher{$request_name}) {
5128: die "Attempting to define a duplicate request handler for $request_name\n";
5129: }
5130: # Build the client type mask:
5131:
5132: my $client_type_mask = 0;
5133: if($client_ok) {
5134: $client_type_mask |= $CLIENT_OK;
5135: }
5136: if($manager_ok) {
5137: $client_type_mask |= $MANAGER_OK;
5138: }
5139:
5140: # Enter the hash:
5141:
5142: my @entry = ($procedure, $must_encode, $client_type_mask);
5143:
5144: $Dispatcher{$request_name} = \@entry;
5145:
5146: }
5147:
5148:
5149: #------------------------------------------------------------------
5150:
5151:
5152:
5153:
5154: #
5155: # Convert an error return code from lcpasswd to a string value.
5156: #
5157: sub lcpasswdstrerror {
5158: my $ErrorCode = shift;
5159: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
5160: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5161: } else {
5162: return $passwderrors[$ErrorCode];
5163: }
5164: }
5165:
5166: #
5167: # Convert an error return code from lcuseradd to a string value:
5168: #
5169: sub lcuseraddstrerror {
5170: my $ErrorCode = shift;
5171: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
5172: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
5173: } else {
5174: return $adderrors[$ErrorCode];
5175: }
5176: }
5177:
5178: # grabs exception and records it to log before exiting
5179: sub catchexception {
5180: my ($error)=@_;
5181: $SIG{'QUIT'}='DEFAULT';
5182: $SIG{__DIE__}='DEFAULT';
5183: &status("Catching exception");
5184: &logthis("<font color='red'>CRITICAL: "
5185: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
5186: ."a crash with this error msg->[$error]</font>");
5187: &logthis('Famous last words: '.$status.' - '.$lastlog);
5188: if ($client) { print $client "error: $error\n"; }
5189: $server->close();
5190: die($error);
5191: }
5192: sub timeout {
5193: &status("Handling Timeout");
5194: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
5195: &catchexception('Timeout');
5196: }
5197: # -------------------------------- Set signal handlers to record abnormal exits
5198:
5199:
5200: $SIG{'QUIT'}=\&catchexception;
5201: $SIG{__DIE__}=\&catchexception;
5202:
5203: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
5204: &status("Read loncapa.conf and loncapa_apache.conf");
5205: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
5206: %perlvar=%{$perlvarref};
5207: undef $perlvarref;
5208:
5209: # ----------------------------- Make sure this process is running from user=www
5210: my $wwwid=getpwnam('www');
5211: if ($wwwid!=$<) {
5212: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5213: my $subj="LON: $currenthostid User ID mismatch";
5214: system("echo 'User ID mismatch. lond must be run as user www.' |\
5215: mailto $emailto -s '$subj' > /dev/null");
5216: exit 1;
5217: }
5218:
5219: # --------------------------------------------- Check if other instance running
5220:
5221: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
5222:
5223: if (-e $pidfile) {
5224: my $lfh=IO::File->new("$pidfile");
5225: my $pide=<$lfh>;
5226: chomp($pide);
5227: if (kill 0 => $pide) { die "already running"; }
5228: }
5229:
5230: # ------------------------------------------------------------- Read hosts file
5231:
5232:
5233:
5234: # establish SERVER socket, bind and listen.
5235: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
5236: Type => SOCK_STREAM,
5237: Proto => 'tcp',
5238: Reuse => 1,
5239: Listen => 10 )
5240: or die "making socket: $@\n";
5241:
5242: # --------------------------------------------------------- Do global variables
5243:
5244: # global variables
5245:
5246: my %children = (); # keys are current child process IDs
5247:
5248: sub REAPER { # takes care of dead children
5249: $SIG{CHLD} = \&REAPER;
5250: &status("Handling child death");
5251: my $pid;
5252: do {
5253: $pid = waitpid(-1,&WNOHANG());
5254: if (defined($children{$pid})) {
5255: &logthis("Child $pid died");
5256: delete($children{$pid});
5257: } elsif ($pid > 0) {
5258: &logthis("Unknown Child $pid died");
5259: }
5260: } while ( $pid > 0 );
5261: foreach my $child (keys(%children)) {
5262: $pid = waitpid($child,&WNOHANG());
5263: if ($pid > 0) {
5264: &logthis("Child $child - $pid looks like we missed it's death");
5265: delete($children{$pid});
5266: }
5267: }
5268: &status("Finished Handling child death");
5269: }
5270:
5271: sub HUNTSMAN { # signal handler for SIGINT
5272: &status("Killing children (INT)");
5273: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5274: kill 'INT' => keys %children;
5275: &logthis("Free socket: ".shutdown($server,2)); # free up socket
5276: my $execdir=$perlvar{'lonDaemons'};
5277: unlink("$execdir/logs/lond.pid");
5278: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
5279: &status("Done killing children");
5280: exit; # clean up with dignity
5281: }
5282:
5283: sub HUPSMAN { # signal handler for SIGHUP
5284: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5285: &status("Killing children for restart (HUP)");
5286: kill 'INT' => keys %children;
5287: &logthis("Free socket: ".shutdown($server,2)); # free up socket
5288: &logthis("<font color='red'>CRITICAL: Restarting</font>");
5289: my $execdir=$perlvar{'lonDaemons'};
5290: unlink("$execdir/logs/lond.pid");
5291: &status("Restarting self (HUP)");
5292: exec("$execdir/lond"); # here we go again
5293: }
5294:
5295: #
5296: # Reload the Apache daemon's state.
5297: # This is done by invoking /home/httpd/perl/apachereload
5298: # a setuid perl script that can be root for us to do this job.
5299: #
5300: sub ReloadApache {
5301: my $execdir = $perlvar{'lonDaemons'};
5302: my $script = $execdir."/apachereload";
5303: system($script);
5304: }
5305:
5306: #
5307: # Called in response to a USR2 signal.
5308: # - Reread hosts.tab
5309: # - All children connected to hosts that were removed from hosts.tab
5310: # are killed via SIGINT
5311: # - All children connected to previously existing hosts are sent SIGUSR1
5312: # - Our internal hosts hash is updated to reflect the new contents of
5313: # hosts.tab causing connections from hosts added to hosts.tab to
5314: # now be honored.
5315: #
5316: sub UpdateHosts {
5317: &status("Reload hosts.tab");
5318: logthis('<font color="blue"> Updating connections </font>');
5319: #
5320: # The %children hash has the set of IP's we currently have children
5321: # on. These need to be matched against records in the hosts.tab
5322: # Any ip's no longer in the table get killed off they correspond to
5323: # either dropped or changed hosts. Note that the re-read of the table
5324: # will take care of new and changed hosts as connections come into being.
5325:
5326: &Apache::lonnet::reset_hosts_info();
5327:
5328: foreach my $child (keys(%children)) {
5329: my $childip = $children{$child};
5330: if ($childip ne '127.0.0.1'
5331: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
5332: logthis('<font color="blue"> UpdateHosts killing child '
5333: ." $child for ip $childip </font>");
5334: kill('INT', $child);
5335: } else {
5336: logthis('<font color="green"> keeping child for ip '
5337: ." $childip (pid=$child) </font>");
5338: }
5339: }
5340: ReloadApache;
5341: &status("Finished reloading hosts.tab");
5342: }
5343:
5344:
5345: sub checkchildren {
5346: &status("Checking on the children (sending signals)");
5347: &initnewstatus();
5348: &logstatus();
5349: &logthis('Going to check on the children');
5350: my $docdir=$perlvar{'lonDocRoot'};
5351: foreach (sort keys %children) {
5352: #sleep 1;
5353: unless (kill 'USR1' => $_) {
5354: &logthis ('Child '.$_.' is dead');
5355: &logstatus($$.' is dead');
5356: delete($children{$_});
5357: }
5358: }
5359: sleep 5;
5360: $SIG{ALRM} = sub { Debug("timeout");
5361: die "timeout"; };
5362: $SIG{__DIE__} = 'DEFAULT';
5363: &status("Checking on the children (waiting for reports)");
5364: foreach (sort keys %children) {
5365: unless (-e "$docdir/lon-status/londchld/$_.txt") {
5366: eval {
5367: alarm(300);
5368: &logthis('Child '.$_.' did not respond');
5369: kill 9 => $_;
5370: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5371: #$subj="LON: $currenthostid killed lond process $_";
5372: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
5373: #$execdir=$perlvar{'lonDaemons'};
5374: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
5375: delete($children{$_});
5376: alarm(0);
5377: }
5378: }
5379: }
5380: $SIG{ALRM} = 'DEFAULT';
5381: $SIG{__DIE__} = \&catchexception;
5382: &status("Finished checking children");
5383: &logthis('Finished Checking children');
5384: }
5385:
5386: # --------------------------------------------------------------------- Logging
5387:
5388: sub logthis {
5389: my $message=shift;
5390: my $execdir=$perlvar{'lonDaemons'};
5391: my $fh=IO::File->new(">>$execdir/logs/lond.log");
5392: my $now=time;
5393: my $local=localtime($now);
5394: $lastlog=$local.': '.$message;
5395: print $fh "$local ($$): $message\n";
5396: }
5397:
5398: # ------------------------- Conditional log if $DEBUG true.
5399: sub Debug {
5400: my $message = shift;
5401: if($DEBUG) {
5402: &logthis($message);
5403: }
5404: }
5405:
5406: #
5407: # Sub to do replies to client.. this gives a hook for some
5408: # debug tracing too:
5409: # Parameters:
5410: # fd - File open on client.
5411: # reply - Text to send to client.
5412: # request - Original request from client.
5413: #
5414: sub Reply {
5415: my ($fd, $reply, $request) = @_;
5416: if (ref($reply)) {
5417: print $fd $$reply;
5418: print $fd "\n";
5419: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
5420: } else {
5421: print $fd $reply;
5422: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
5423: }
5424: $Transactions++;
5425: }
5426:
5427:
5428: #
5429: # Sub to report a failure.
5430: # This function:
5431: # - Increments the failure statistic counters.
5432: # - Invokes Reply to send the error message to the client.
5433: # Parameters:
5434: # fd - File descriptor open on the client
5435: # reply - Reply text to emit.
5436: # request - The original request message (used by Reply
5437: # to debug if that's enabled.
5438: # Implicit outputs:
5439: # $Failures- The number of failures is incremented.
5440: # Reply (invoked here) sends a message to the
5441: # client:
5442: #
5443: sub Failure {
5444: my $fd = shift;
5445: my $reply = shift;
5446: my $request = shift;
5447:
5448: $Failures++;
5449: Reply($fd, $reply, $request); # That's simple eh?
5450: }
5451: # ------------------------------------------------------------------ Log status
5452:
5453: sub logstatus {
5454: &status("Doing logging");
5455: my $docdir=$perlvar{'lonDocRoot'};
5456: {
5457: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
5458: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
5459: $fh->close();
5460: }
5461: &status("Finished $$.txt");
5462: {
5463: open(LOG,">>$docdir/lon-status/londstatus.txt");
5464: flock(LOG,LOCK_EX);
5465: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
5466: .$status."\t".$lastlog."\t $keymode\n";
5467: flock(LOG,LOCK_UN);
5468: close(LOG);
5469: }
5470: &status("Finished logging");
5471: }
5472:
5473: sub initnewstatus {
5474: my $docdir=$perlvar{'lonDocRoot'};
5475: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
5476: my $now=time;
5477: my $local=localtime($now);
5478: print $fh "LOND status $local - parent $$\n\n";
5479: opendir(DIR,"$docdir/lon-status/londchld");
5480: while (my $filename=readdir(DIR)) {
5481: unlink("$docdir/lon-status/londchld/$filename");
5482: }
5483: closedir(DIR);
5484: }
5485:
5486: # -------------------------------------------------------------- Status setting
5487:
5488: sub status {
5489: my $what=shift;
5490: my $now=time;
5491: my $local=localtime($now);
5492: $status=$local.': '.$what;
5493: $0='lond: '.$what.' '.$local;
5494: }
5495:
5496: # -------------------------------------------------------------- Talk to lonsql
5497:
5498: sub sql_reply {
5499: my ($cmd)=@_;
5500: my $answer=&sub_sql_reply($cmd);
5501: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
5502: return $answer;
5503: }
5504:
5505: sub sub_sql_reply {
5506: my ($cmd)=@_;
5507: my $unixsock="mysqlsock";
5508: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5509: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5510: Type => SOCK_STREAM,
5511: Timeout => 10)
5512: or return "con_lost";
5513: print $sclient "$cmd:$currentdomainid\n";
5514: my $answer=<$sclient>;
5515: chomp($answer);
5516: if (!$answer) { $answer="con_lost"; }
5517: return $answer;
5518: }
5519:
5520: # --------------------------------------- Is this the home server of an author?
5521:
5522: sub ishome {
5523: my $author=shift;
5524: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5525: my ($udom,$uname)=split(/\//,$author);
5526: my $proname=propath($udom,$uname);
5527: if (-e $proname) {
5528: return 'owner';
5529: } else {
5530: return 'not_owner';
5531: }
5532: }
5533:
5534: # ======================================================= Continue main program
5535: # ---------------------------------------------------- Fork once and dissociate
5536:
5537: my $fpid=fork;
5538: exit if $fpid;
5539: die "Couldn't fork: $!" unless defined ($fpid);
5540:
5541: POSIX::setsid() or die "Can't start new session: $!";
5542:
5543: # ------------------------------------------------------- Write our PID on disk
5544:
5545: my $execdir=$perlvar{'lonDaemons'};
5546: open (PIDSAVE,">$execdir/logs/lond.pid");
5547: print PIDSAVE "$$\n";
5548: close(PIDSAVE);
5549: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
5550: &status('Starting');
5551:
5552:
5553:
5554: # ----------------------------------------------------- Install signal handlers
5555:
5556:
5557: $SIG{CHLD} = \&REAPER;
5558: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5559: $SIG{HUP} = \&HUPSMAN;
5560: $SIG{USR1} = \&checkchildren;
5561: $SIG{USR2} = \&UpdateHosts;
5562:
5563: # Read the host hashes:
5564: &Apache::lonnet::load_hosts_tab();
5565:
5566: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5567:
5568: # --------------------------------------------------------------
5569: # Accept connections. When a connection comes in, it is validated
5570: # and if good, a child process is created to process transactions
5571: # along the connection.
5572:
5573: while (1) {
5574: &status('Starting accept');
5575: $client = $server->accept() or next;
5576: &status('Accepted '.$client.' off to spawn');
5577: make_new_child($client);
5578: &status('Finished spawning');
5579: }
5580:
5581: sub make_new_child {
5582: my $pid;
5583: # my $cipher; # Now global
5584: my $sigset;
5585:
5586: $client = shift;
5587: &status('Starting new child '.$client);
5588: &logthis('<font color="green"> Attempting to start child ('.$client.
5589: ")</font>");
5590: # block signal for fork
5591: $sigset = POSIX::SigSet->new(SIGINT);
5592: sigprocmask(SIG_BLOCK, $sigset)
5593: or die "Can't block SIGINT for fork: $!\n";
5594:
5595: die "fork: $!" unless defined ($pid = fork);
5596:
5597: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5598: # connection liveness.
5599:
5600: #
5601: # Figure out who we're talking to so we can record the peer in
5602: # the pid hash.
5603: #
5604: my $caller = getpeername($client);
5605: my ($port,$iaddr);
5606: if (defined($caller) && length($caller) > 0) {
5607: ($port,$iaddr)=unpack_sockaddr_in($caller);
5608: } else {
5609: &logthis("Unable to determine who caller was, getpeername returned nothing");
5610: }
5611: if (defined($iaddr)) {
5612: $clientip = inet_ntoa($iaddr);
5613: Debug("Connected with $clientip");
5614: } else {
5615: &logthis("Unable to determine clientip");
5616: $clientip='Unavailable';
5617: }
5618:
5619: if ($pid) {
5620: # Parent records the child's birth and returns.
5621: sigprocmask(SIG_UNBLOCK, $sigset)
5622: or die "Can't unblock SIGINT for fork: $!\n";
5623: $children{$pid} = $clientip;
5624: &status('Started child '.$pid);
5625: return;
5626: } else {
5627: # Child can *not* return from this subroutine.
5628: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5629: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5630: #don't get intercepted
5631: $SIG{USR1}= \&logstatus;
5632: $SIG{ALRM}= \&timeout;
5633: $lastlog='Forked ';
5634: $status='Forked';
5635:
5636: # unblock signals
5637: sigprocmask(SIG_UNBLOCK, $sigset)
5638: or die "Can't unblock SIGINT for fork: $!\n";
5639:
5640: # my $tmpsnum=0; # Now global
5641: #---------------------------------------------------- kerberos 5 initialization
5642: &Authen::Krb5::init_context();
5643: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
5644: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
5645: &Authen::Krb5::init_ets();
5646: }
5647:
5648: &status('Accepted connection');
5649: # =============================================================================
5650: # do something with the connection
5651: # -----------------------------------------------------------------------------
5652: # see if we know client and 'check' for spoof IP by ineffective challenge
5653:
5654: my $outsideip=$clientip;
5655: if ($clientip eq '127.0.0.1') {
5656: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
5657: }
5658:
5659: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
5660: my $ismanager=($managers{$outsideip} ne undef);
5661: $clientname = "[unknonwn]";
5662: if($clientrec) { # Establish client type.
5663: $ConnectionType = "client";
5664: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
5665: if($ismanager) {
5666: $ConnectionType = "both";
5667: }
5668: } else {
5669: $ConnectionType = "manager";
5670: $clientname = $managers{$outsideip};
5671: }
5672: my $clientok;
5673:
5674: if ($clientrec || $ismanager) {
5675: &status("Waiting for init from $clientip $clientname");
5676: &logthis('<font color="yellow">INFO: Connection, '.
5677: $clientip.
5678: " ($clientname) connection type = $ConnectionType </font>" );
5679: &status("Connecting $clientip ($clientname))");
5680: my $remotereq=<$client>;
5681: chomp($remotereq);
5682: Debug("Got init: $remotereq");
5683:
5684: if ($remotereq =~ /^init/) {
5685: &sethost("sethost:$perlvar{'lonHostID'}");
5686: #
5687: # If the remote is attempting a local init... give that a try:
5688: #
5689: my ($i, $inittype) = split(/:/, $remotereq);
5690:
5691: # If the connection type is ssl, but I didn't get my
5692: # certificate files yet, then I'll drop back to
5693: # insecure (if allowed).
5694:
5695: if($inittype eq "ssl") {
5696: my ($ca, $cert) = lonssl::CertificateFile;
5697: my $kfile = lonssl::KeyFile;
5698: if((!$ca) ||
5699: (!$cert) ||
5700: (!$kfile)) {
5701: $inittype = ""; # This forces insecure attempt.
5702: &logthis("<font color=\"blue\"> Certificates not "
5703: ."installed -- trying insecure auth</font>");
5704: } else { # SSL certificates are in place so
5705: } # Leave the inittype alone.
5706: }
5707:
5708: if($inittype eq "local") {
5709: my $key = LocalConnection($client, $remotereq);
5710: if($key) {
5711: Debug("Got local key $key");
5712: $clientok = 1;
5713: my $cipherkey = pack("H32", $key);
5714: $cipher = new IDEA($cipherkey);
5715: print $client "ok:local\n";
5716: &logthis('<font color="green"'
5717: . "Successful local authentication </font>");
5718: $keymode = "local"
5719: } else {
5720: Debug("Failed to get local key");
5721: $clientok = 0;
5722: shutdown($client, 3);
5723: close $client;
5724: }
5725: } elsif ($inittype eq "ssl") {
5726: my $key = SSLConnection($client);
5727: if ($key) {
5728: $clientok = 1;
5729: my $cipherkey = pack("H32", $key);
5730: $cipher = new IDEA($cipherkey);
5731: &logthis('<font color="green">'
5732: ."Successfull ssl authentication with $clientname </font>");
5733: $keymode = "ssl";
5734:
5735: } else {
5736: $clientok = 0;
5737: close $client;
5738: }
5739:
5740: } else {
5741: my $ok = InsecureConnection($client);
5742: if($ok) {
5743: $clientok = 1;
5744: &logthis('<font color="green">'
5745: ."Successful insecure authentication with $clientname </font>");
5746: print $client "ok\n";
5747: $keymode = "insecure";
5748: } else {
5749: &logthis('<font color="yellow">'
5750: ."Attempted insecure connection disallowed </font>");
5751: close $client;
5752: $clientok = 0;
5753:
5754: }
5755: }
5756: } else {
5757: &logthis(
5758: "<font color='blue'>WARNING: "
5759: ."$clientip failed to initialize: >$remotereq< </font>");
5760: &status('No init '.$clientip);
5761: }
5762:
5763: } else {
5764: &logthis(
5765: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5766: &status('Hung up on '.$clientip);
5767: }
5768:
5769: if ($clientok) {
5770: # ---------------- New known client connecting, could mean machine online again
5771: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
5772: && $clientip ne '127.0.0.1') {
5773: &Apache::lonnet::reconlonc($clientname);
5774: }
5775: &logthis("<font color='green'>Established connection: $clientname</font>");
5776: &status('Will listen to '.$clientname);
5777: # ------------------------------------------------------------ Process requests
5778: my $keep_going = 1;
5779: my $user_input;
5780: while(($user_input = get_request) && $keep_going) {
5781: alarm(120);
5782: Debug("Main: Got $user_input\n");
5783: $keep_going = &process_request($user_input);
5784: alarm(0);
5785: &status('Listening to '.$clientname." ($keymode)");
5786: }
5787:
5788: # --------------------------------------------- client unknown or fishy, refuse
5789: } else {
5790: print $client "refused\n";
5791: $client->close();
5792: &logthis("<font color='blue'>WARNING: "
5793: ."Rejected client $clientip, closing connection</font>");
5794: }
5795: }
5796:
5797: # =============================================================================
5798:
5799: &logthis("<font color='red'>CRITICAL: "
5800: ."Disconnect from $clientip ($clientname)</font>");
5801:
5802:
5803: # this exit is VERY important, otherwise the child will become
5804: # a producer of more and more children, forking yourself into
5805: # process death.
5806: exit;
5807:
5808: }
5809: #
5810: # Determine if a user is an author for the indicated domain.
5811: #
5812: # Parameters:
5813: # domain - domain to check in .
5814: # user - Name of user to check.
5815: #
5816: # Return:
5817: # 1 - User is an author for domain.
5818: # 0 - User is not an author for domain.
5819: sub is_author {
5820: my ($domain, $user) = @_;
5821:
5822: &Debug("is_author: $user @ $domain");
5823:
5824: my $hashref = &tie_user_hash($domain, $user, "roles",
5825: &GDBM_READER());
5826:
5827: # Author role should show up as a key /domain/_au
5828:
5829: my $key = "/$domain/_au";
5830: my $value;
5831: if (defined($hashref)) {
5832: $value = $hashref->{$key};
5833: }
5834:
5835: if(defined($value)) {
5836: &Debug("$user @ $domain is an author");
5837: }
5838:
5839: return defined($value);
5840: }
5841: #
5842: # Checks to see if the input roleput request was to set
5843: # an author role. If so, invokes the lchtmldir script to set
5844: # up a correct public_html
5845: # Parameters:
5846: # request - The request sent to the rolesput subchunk.
5847: # We're looking for /domain/_au
5848: # domain - The domain in which the user is having roles doctored.
5849: # user - Name of the user for which the role is being put.
5850: # authtype - The authentication type associated with the user.
5851: #
5852: sub manage_permissions {
5853: my ($request, $domain, $user, $authtype) = @_;
5854:
5855: &Debug("manage_permissions: $request $domain $user $authtype");
5856:
5857: # See if the request is of the form /$domain/_au
5858: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
5859: my $execdir = $perlvar{'lonDaemons'};
5860: my $userhome= "/home/$user" ;
5861: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
5862: &Debug("Setting homedir permissions for $userhome");
5863: system("$execdir/lchtmldir $userhome $user $authtype");
5864: }
5865: }
5866:
5867:
5868: #
5869: # Return the full path of a user password file, whether it exists or not.
5870: # Parameters:
5871: # domain - Domain in which the password file lives.
5872: # user - name of the user.
5873: # Returns:
5874: # Full passwd path:
5875: #
5876: sub password_path {
5877: my ($domain, $user) = @_;
5878: return &propath($domain, $user).'/passwd';
5879: }
5880:
5881: # Password Filename
5882: # Returns the path to a passwd file given domain and user... only if
5883: # it exists.
5884: # Parameters:
5885: # domain - Domain in which to search.
5886: # user - username.
5887: # Returns:
5888: # - If the password file exists returns its path.
5889: # - If the password file does not exist, returns undefined.
5890: #
5891: sub password_filename {
5892: my ($domain, $user) = @_;
5893:
5894: Debug ("PasswordFilename called: dom = $domain user = $user");
5895:
5896: my $path = &password_path($domain, $user);
5897: Debug("PasswordFilename got path: $path");
5898: if(-e $path) {
5899: return $path;
5900: } else {
5901: return undef;
5902: }
5903: }
5904:
5905: #
5906: # Rewrite the contents of the user's passwd file.
5907: # Parameters:
5908: # domain - domain of the user.
5909: # name - User's name.
5910: # contents - New contents of the file.
5911: # Returns:
5912: # 0 - Failed.
5913: # 1 - Success.
5914: #
5915: sub rewrite_password_file {
5916: my ($domain, $user, $contents) = @_;
5917:
5918: my $file = &password_filename($domain, $user);
5919: if (defined $file) {
5920: my $pf = IO::File->new(">$file");
5921: if($pf) {
5922: print $pf "$contents\n";
5923: return 1;
5924: } else {
5925: return 0;
5926: }
5927: } else {
5928: return 0;
5929: }
5930:
5931: }
5932:
5933: #
5934: # get_auth_type - Determines the authorization type of a user in a domain.
5935:
5936: # Returns the authorization type or nouser if there is no such user.
5937: #
5938: sub get_auth_type
5939: {
5940:
5941: my ($domain, $user) = @_;
5942:
5943: Debug("get_auth_type( $domain, $user ) \n");
5944: my $proname = &propath($domain, $user);
5945: my $passwdfile = "$proname/passwd";
5946: if( -e $passwdfile ) {
5947: my $pf = IO::File->new($passwdfile);
5948: my $realpassword = <$pf>;
5949: chomp($realpassword);
5950: Debug("Password info = $realpassword\n");
5951: my ($authtype, $contentpwd) = split(/:/, $realpassword);
5952: Debug("Authtype = $authtype, content = $contentpwd\n");
5953: return "$authtype:$contentpwd";
5954: } else {
5955: Debug("Returning nouser");
5956: return "nouser";
5957: }
5958: }
5959:
5960: #
5961: # Validate a user given their domain, name and password. This utility
5962: # function is used by both AuthenticateHandler and ChangePasswordHandler
5963: # to validate the login credentials of a user.
5964: # Parameters:
5965: # $domain - The domain being logged into (this is required due to
5966: # the capability for multihomed systems.
5967: # $user - The name of the user being validated.
5968: # $password - The user's propoposed password.
5969: #
5970: # Returns:
5971: # 1 - The domain,user,pasword triplet corresponds to a valid
5972: # user.
5973: # 0 - The domain,user,password triplet is not a valid user.
5974: #
5975: sub validate_user {
5976: my ($domain, $user, $password, $defauthtype, $defautharg) = @_;
5977:
5978: # Why negative ~pi you may well ask? Well this function is about
5979: # authentication, and therefore very important to get right.
5980: # I've initialized the flag that determines whether or not I've
5981: # validated correctly to a value it's not supposed to get.
5982: # At the end of this function. I'll ensure that it's not still that
5983: # value so we don't just wind up returning some accidental value
5984: # as a result of executing an unforseen code path that
5985: # did not set $validated. At the end of valid execution paths,
5986: # validated shoule be 1 for success or 0 for failuer.
5987:
5988: my $validated = -3.14159;
5989:
5990: # How we authenticate is determined by the type of authentication
5991: # the user has been assigned. If the authentication type is
5992: # "nouser", the user does not exist so we will return 0.
5993:
5994: my $contents = &get_auth_type($domain, $user);
5995: my ($howpwd, $contentpwd) = split(/:/, $contents);
5996:
5997: my $null = pack("C",0); # Used by kerberos auth types.
5998:
5999: if ($howpwd eq 'nouser') {
6000: if ($defauthtype eq 'localauth') {
6001: $howpwd = $defauthtype;
6002: $contentpwd = $defautharg;
6003: } elsif ((($defauthtype eq 'krb4') || ($defauthtype eq 'krb5')) &&
6004: ($defautharg ne '')) {
6005: $howpwd = $defauthtype;
6006: $contentpwd = $defautharg;
6007: }
6008: }
6009: if ($howpwd ne 'nouser') {
6010: if($howpwd eq "internal") { # Encrypted is in local password file.
6011: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6012: }
6013: elsif ($howpwd eq "unix") { # User is a normal unix user.
6014: $contentpwd = (getpwnam($user))[1];
6015: if($contentpwd) {
6016: if($contentpwd eq 'x') { # Shadow password file...
6017: my $pwauth_path = "/usr/local/sbin/pwauth";
6018: open PWAUTH, "|$pwauth_path" or
6019: die "Cannot invoke authentication";
6020: print PWAUTH "$user\n$password\n";
6021: close PWAUTH;
6022: $validated = ! $?;
6023:
6024: } else { # Passwords in /etc/passwd.
6025: $validated = (crypt($password,
6026: $contentpwd) eq $contentpwd);
6027: }
6028: } else {
6029: $validated = 0;
6030: }
6031: }
6032: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6033: if(! ($password =~ /$null/) ) {
6034: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6035: "",
6036: $contentpwd,,
6037: 'krbtgt',
6038: $contentpwd,
6039: 1,
6040: $password);
6041: if(!$k4error) {
6042: $validated = 1;
6043: } else {
6044: $validated = 0;
6045: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6046: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6047: }
6048: } else {
6049: $validated = 0; # Password has a match with null.
6050: }
6051: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
6052: if(!($password =~ /$null/)) { # Null password not allowed.
6053: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6054: .$contentpwd);
6055: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6056: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6057: my $credentials= &Authen::Krb5::cc_default();
6058: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6059: .$contentpwd));
6060: my $krbreturn;
6061: if (exists(&Authen::Krb5::get_init_creds_password)) {
6062: $krbreturn =
6063: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6064: $krbservice);
6065: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6066: } else {
6067: $krbreturn =
6068: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6069: $password,$credentials);
6070: $validated = ($krbreturn == 1);
6071: }
6072: if (!$validated) {
6073: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6074: &Authen::Krb5::error());
6075: }
6076: } else {
6077: $validated = 0;
6078: }
6079: } elsif ($howpwd eq "localauth") {
6080: # Authenticate via installation specific authentcation method:
6081: $validated = &localauth::localauth($user,
6082: $password,
6083: $contentpwd,
6084: $domain);
6085: if ($validated < 0) {
6086: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6087: $validated = 0;
6088: }
6089: } else { # Unrecognized auth is also bad.
6090: $validated = 0;
6091: }
6092: } else {
6093: $validated = 0;
6094: }
6095: #
6096: # $validated has the correct stat of the authentication:
6097: #
6098:
6099: unless ($validated != -3.14159) {
6100: # I >really really< want to know if this happens.
6101: # since it indicates that user authentication is badly
6102: # broken in some code path.
6103: #
6104: die "ValidateUser - failed to set the value of validated $domain, $user $password";
6105: }
6106: return $validated;
6107: }
6108:
6109:
6110: sub addline {
6111: my ($fname,$hostid,$ip,$newline)=@_;
6112: my $contents;
6113: my $found=0;
6114: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
6115: my $sh;
6116: if ($sh=IO::File->new("$fname.subscription")) {
6117: while (my $subline=<$sh>) {
6118: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
6119: }
6120: $sh->close();
6121: }
6122: $sh=IO::File->new(">$fname.subscription");
6123: if ($contents) { print $sh $contents; }
6124: if ($newline) { print $sh $newline; }
6125: $sh->close();
6126: return $found;
6127: }
6128:
6129: sub get_chat {
6130: my ($cdom,$cname,$udom,$uname,$group)=@_;
6131:
6132: my @entries=();
6133: my $namespace = 'nohist_chatroom';
6134: my $namespace_inroom = 'nohist_inchatroom';
6135: if ($group ne '') {
6136: $namespace .= '_'.$group;
6137: $namespace_inroom .= '_'.$group;
6138: }
6139: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6140: &GDBM_READER());
6141: if ($hashref) {
6142: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6143: &untie_user_hash($hashref);
6144: }
6145: my @participants=();
6146: my $cutoff=time-60;
6147: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
6148: &GDBM_WRCREAT());
6149: if ($hashref) {
6150: $hashref->{$uname.':'.$udom}=time;
6151: foreach my $user (sort(keys(%$hashref))) {
6152: if ($hashref->{$user}>$cutoff) {
6153: push(@participants, 'active_participant:'.$user);
6154: }
6155: }
6156: &untie_user_hash($hashref);
6157: }
6158: return (@participants,@entries);
6159: }
6160:
6161: sub chat_add {
6162: my ($cdom,$cname,$newchat,$group)=@_;
6163: my @entries=();
6164: my $time=time;
6165: my $namespace = 'nohist_chatroom';
6166: my $logfile = 'chatroom.log';
6167: if ($group ne '') {
6168: $namespace .= '_'.$group;
6169: $logfile = 'chatroom_'.$group.'.log';
6170: }
6171: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6172: &GDBM_WRCREAT());
6173: if ($hashref) {
6174: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6175: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
6176: my ($thentime,$idnum)=split(/\_/,$lastid);
6177: my $newid=$time.'_000000';
6178: if ($thentime==$time) {
6179: $idnum=~s/^0+//;
6180: $idnum++;
6181: $idnum=substr('000000'.$idnum,-6,6);
6182: $newid=$time.'_'.$idnum;
6183: }
6184: $hashref->{$newid}=$newchat;
6185: my $expired=$time-3600;
6186: foreach my $comment (keys(%$hashref)) {
6187: my ($thistime) = ($comment=~/(\d+)\_/);
6188: if ($thistime<$expired) {
6189: delete $hashref->{$comment};
6190: }
6191: }
6192: {
6193: my $proname=&propath($cdom,$cname);
6194: if (open(CHATLOG,">>$proname/$logfile")) {
6195: print CHATLOG ("$time:".&unescape($newchat)."\n");
6196: }
6197: close(CHATLOG);
6198: }
6199: &untie_user_hash($hashref);
6200: }
6201: }
6202:
6203: sub unsub {
6204: my ($fname,$clientip)=@_;
6205: my $result;
6206: my $unsubs = 0; # Number of successful unsubscribes:
6207:
6208:
6209: # An old way subscriptions were handled was to have a
6210: # subscription marker file:
6211:
6212: Debug("Attempting unlink of $fname.$clientname");
6213: if (unlink("$fname.$clientname")) {
6214: $unsubs++; # Successful unsub via marker file.
6215: }
6216:
6217: # The more modern way to do it is to have a subscription list
6218: # file:
6219:
6220: if (-e "$fname.subscription") {
6221: my $found=&addline($fname,$clientname,$clientip,'');
6222: if ($found) {
6223: $unsubs++;
6224: }
6225: }
6226:
6227: # If either or both of these mechanisms succeeded in unsubscribing a
6228: # resource we can return ok:
6229:
6230: if($unsubs) {
6231: $result = "ok\n";
6232: } else {
6233: $result = "not_subscribed\n";
6234: }
6235:
6236: return $result;
6237: }
6238:
6239: sub currentversion {
6240: my $fname=shift;
6241: my $version=-1;
6242: my $ulsdir='';
6243: if ($fname=~/^(.+)\/[^\/]+$/) {
6244: $ulsdir=$1;
6245: }
6246: my ($fnamere1,$fnamere2);
6247: # remove version if already specified
6248: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
6249: # get the bits that go before and after the version number
6250: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
6251: $fnamere1=$1;
6252: $fnamere2='.'.$2;
6253: }
6254: if (-e $fname) { $version=1; }
6255: if (-e $ulsdir) {
6256: if(-d $ulsdir) {
6257: if (opendir(LSDIR,$ulsdir)) {
6258: my $ulsfn;
6259: while ($ulsfn=readdir(LSDIR)) {
6260: # see if this is a regular file (ignore links produced earlier)
6261: my $thisfile=$ulsdir.'/'.$ulsfn;
6262: unless (-l $thisfile) {
6263: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
6264: if ($1>$version) { $version=$1; }
6265: }
6266: }
6267: }
6268: closedir(LSDIR);
6269: $version++;
6270: }
6271: }
6272: }
6273: return $version;
6274: }
6275:
6276: sub thisversion {
6277: my $fname=shift;
6278: my $version=-1;
6279: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
6280: $version=$1;
6281: }
6282: return $version;
6283: }
6284:
6285: sub subscribe {
6286: my ($userinput,$clientip)=@_;
6287: my $result;
6288: my ($cmd,$fname)=split(/:/,$userinput,2);
6289: my $ownership=&ishome($fname);
6290: if ($ownership eq 'owner') {
6291: # explitly asking for the current version?
6292: unless (-e $fname) {
6293: my $currentversion=¤tversion($fname);
6294: if (&thisversion($fname)==$currentversion) {
6295: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
6296: my $root=$1;
6297: my $extension=$2;
6298: symlink($root.'.'.$extension,
6299: $root.'.'.$currentversion.'.'.$extension);
6300: unless ($extension=~/\.meta$/) {
6301: symlink($root.'.'.$extension.'.meta',
6302: $root.'.'.$currentversion.'.'.$extension.'.meta');
6303: }
6304: }
6305: }
6306: }
6307: if (-e $fname) {
6308: if (-d $fname) {
6309: $result="directory\n";
6310: } else {
6311: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
6312: my $now=time;
6313: my $found=&addline($fname,$clientname,$clientip,
6314: "$clientname:$clientip:$now\n");
6315: if ($found) { $result="$fname\n"; }
6316: # if they were subscribed to only meta data, delete that
6317: # subscription, when you subscribe to a file you also get
6318: # the metadata
6319: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
6320: $fname=~s/\/home\/httpd\/html\/res/raw/;
6321: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
6322: $result="$fname\n";
6323: }
6324: } else {
6325: $result="not_found\n";
6326: }
6327: } else {
6328: $result="rejected\n";
6329: }
6330: return $result;
6331: }
6332: # Change the passwd of a unix user. The caller must have
6333: # first verified that the user is a loncapa user.
6334: #
6335: # Parameters:
6336: # user - Unix user name to change.
6337: # pass - New password for the user.
6338: # Returns:
6339: # ok - if success
6340: # other - Some meaningfule error message string.
6341: # NOTE:
6342: # invokes a setuid script to change the passwd.
6343: sub change_unix_password {
6344: my ($user, $pass) = @_;
6345:
6346: &Debug("change_unix_password");
6347: my $execdir=$perlvar{'lonDaemons'};
6348: &Debug("Opening lcpasswd pipeline");
6349: my $pf = IO::File->new("|$execdir/lcpasswd > "
6350: ."$perlvar{'lonDaemons'}"
6351: ."/logs/lcpasswd.log");
6352: print $pf "$user\n$pass\n$pass\n";
6353: close $pf;
6354: my $err = $?;
6355: return ($err < @passwderrors) ? $passwderrors[$err] :
6356: "pwchange_falure - unknown error";
6357:
6358:
6359: }
6360:
6361:
6362: sub make_passwd_file {
6363: my ($uname, $umode,$npass,$passfilename)=@_;
6364: my $result="ok";
6365: if ($umode eq 'krb4' or $umode eq 'krb5') {
6366: {
6367: my $pf = IO::File->new(">$passfilename");
6368: if ($pf) {
6369: print $pf "$umode:$npass\n";
6370: } else {
6371: $result = "pass_file_failed_error";
6372: }
6373: }
6374: } elsif ($umode eq 'internal') {
6375: my $salt=time;
6376: $salt=substr($salt,6,2);
6377: my $ncpass=crypt($npass,$salt);
6378: {
6379: &Debug("Creating internal auth");
6380: my $pf = IO::File->new(">$passfilename");
6381: if($pf) {
6382: print $pf "internal:$ncpass\n";
6383: } else {
6384: $result = "pass_file_failed_error";
6385: }
6386: }
6387: } elsif ($umode eq 'localauth') {
6388: {
6389: my $pf = IO::File->new(">$passfilename");
6390: if($pf) {
6391: print $pf "localauth:$npass\n";
6392: } else {
6393: $result = "pass_file_failed_error";
6394: }
6395: }
6396: } elsif ($umode eq 'unix') {
6397: {
6398: #
6399: # Don't allow the creation of privileged accounts!!! that would
6400: # be real bad!!!
6401: #
6402: my $uid = getpwnam($uname);
6403: if((defined $uid) && ($uid == 0)) {
6404: &logthis(">>>Attempted to create privilged account blocked");
6405: return "no_priv_account_error\n";
6406: }
6407:
6408: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
6409:
6410: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
6411: {
6412: &Debug("Executing external: ".$execpath);
6413: &Debug("user = ".$uname.", Password =". $npass);
6414: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
6415: print $se "$uname\n";
6416: print $se "$npass\n";
6417: print $se "$npass\n";
6418: print $se "$lc_error_file\n"; # Status -> unique file.
6419: }
6420: if (-r $lc_error_file) {
6421: &Debug("Opening error file: $lc_error_file");
6422: my $error = IO::File->new("< $lc_error_file");
6423: my $useraddok = <$error>;
6424: $error->close;
6425: unlink($lc_error_file);
6426:
6427: chomp $useraddok;
6428:
6429: if($useraddok > 0) {
6430: my $error_text = &lcuseraddstrerror($useraddok);
6431: &logthis("Failed lcuseradd: $error_text");
6432: $result = "lcuseradd_failed:$error_text";
6433: } else {
6434: my $pf = IO::File->new(">$passfilename");
6435: if($pf) {
6436: print $pf "unix:\n";
6437: } else {
6438: $result = "pass_file_failed_error";
6439: }
6440: }
6441: } else {
6442: &Debug("Could not locate lcuseradd error: $lc_error_file");
6443: $result="bug_lcuseradd_no_output_file";
6444: }
6445: }
6446: } elsif ($umode eq 'none') {
6447: {
6448: my $pf = IO::File->new("> $passfilename");
6449: if($pf) {
6450: print $pf "none:\n";
6451: } else {
6452: $result = "pass_file_failed_error";
6453: }
6454: }
6455: } else {
6456: $result="auth_mode_error";
6457: }
6458: return $result;
6459: }
6460:
6461: sub convert_photo {
6462: my ($start,$dest)=@_;
6463: system("convert $start $dest");
6464: }
6465:
6466: sub sethost {
6467: my ($remotereq) = @_;
6468: my (undef,$hostid)=split(/:/,$remotereq);
6469: # ignore sethost if we are already correct
6470: if ($hostid eq $currenthostid) {
6471: return 'ok';
6472: }
6473:
6474: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
6475: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
6476: eq &Apache::lonnet::get_host_ip($hostid)) {
6477: $currenthostid =$hostid;
6478: $currentdomainid=&Apache::lonnet::host_domain($hostid);
6479: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
6480: } else {
6481: &logthis("Requested host id $hostid not an alias of ".
6482: $perlvar{'lonHostID'}." refusing connection");
6483: return 'unable_to_set';
6484: }
6485: return 'ok';
6486: }
6487:
6488: sub version {
6489: my ($userinput)=@_;
6490: $remoteVERSION=(split(/:/,$userinput))[1];
6491: return "version:$VERSION";
6492: }
6493:
6494:
6495: # ----------------------------------- POD (plain old documentation, CPAN style)
6496:
6497: =head1 NAME
6498:
6499: lond - "LON Daemon" Server (port "LOND" 5663)
6500:
6501: =head1 SYNOPSIS
6502:
6503: Usage: B<lond>
6504:
6505: Should only be run as user=www. This is a command-line script which
6506: is invoked by B<loncron>. There is no expectation that a typical user
6507: will manually start B<lond> from the command-line. (In other words,
6508: DO NOT START B<lond> YOURSELF.)
6509:
6510: =head1 DESCRIPTION
6511:
6512: There are two characteristics associated with the running of B<lond>,
6513: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6514: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6515: subscriptions, etc). These are described in two large
6516: sections below.
6517:
6518: B<PROCESS MANAGEMENT>
6519:
6520: Preforker - server who forks first. Runs as a daemon. HUPs.
6521: Uses IDEA encryption
6522:
6523: B<lond> forks off children processes that correspond to the other servers
6524: in the network. Management of these processes can be done at the
6525: parent process level or the child process level.
6526:
6527: B<logs/lond.log> is the location of log messages.
6528:
6529: The process management is now explained in terms of linux shell commands,
6530: subroutines internal to this code, and signal assignments:
6531:
6532: =over 4
6533:
6534: =item *
6535:
6536: PID is stored in B<logs/lond.pid>
6537:
6538: This is the process id number of the parent B<lond> process.
6539:
6540: =item *
6541:
6542: SIGTERM and SIGINT
6543:
6544: Parent signal assignment:
6545: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6546:
6547: Child signal assignment:
6548: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6549: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6550: to restart a new child.)
6551:
6552: Command-line invocations:
6553: B<kill> B<-s> SIGTERM I<PID>
6554: B<kill> B<-s> SIGINT I<PID>
6555:
6556: Subroutine B<HUNTSMAN>:
6557: This is only invoked for the B<lond> parent I<PID>.
6558: This kills all the children, and then the parent.
6559: The B<lonc.pid> file is cleared.
6560:
6561: =item *
6562:
6563: SIGHUP
6564:
6565: Current bug:
6566: This signal can only be processed the first time
6567: on the parent process. Subsequent SIGHUP signals
6568: have no effect.
6569:
6570: Parent signal assignment:
6571: $SIG{HUP} = \&HUPSMAN;
6572:
6573: Child signal assignment:
6574: none (nothing happens)
6575:
6576: Command-line invocations:
6577: B<kill> B<-s> SIGHUP I<PID>
6578:
6579: Subroutine B<HUPSMAN>:
6580: This is only invoked for the B<lond> parent I<PID>,
6581: This kills all the children, and then the parent.
6582: The B<lond.pid> file is cleared.
6583:
6584: =item *
6585:
6586: SIGUSR1
6587:
6588: Parent signal assignment:
6589: $SIG{USR1} = \&USRMAN;
6590:
6591: Child signal assignment:
6592: $SIG{USR1}= \&logstatus;
6593:
6594: Command-line invocations:
6595: B<kill> B<-s> SIGUSR1 I<PID>
6596:
6597: Subroutine B<USRMAN>:
6598: When invoked for the B<lond> parent I<PID>,
6599: SIGUSR1 is sent to all the children, and the status of
6600: each connection is logged.
6601:
6602: =item *
6603:
6604: SIGUSR2
6605:
6606: Parent Signal assignment:
6607: $SIG{USR2} = \&UpdateHosts
6608:
6609: Child signal assignment:
6610: NONE
6611:
6612:
6613: =item *
6614:
6615: SIGCHLD
6616:
6617: Parent signal assignment:
6618: $SIG{CHLD} = \&REAPER;
6619:
6620: Child signal assignment:
6621: none
6622:
6623: Command-line invocations:
6624: B<kill> B<-s> SIGCHLD I<PID>
6625:
6626: Subroutine B<REAPER>:
6627: This is only invoked for the B<lond> parent I<PID>.
6628: Information pertaining to the child is removed.
6629: The socket port is cleaned up.
6630:
6631: =back
6632:
6633: B<SERVER-SIDE ACTIVITIES>
6634:
6635: Server-side information can be accepted in an encrypted or non-encrypted
6636: method.
6637:
6638: =over 4
6639:
6640: =item ping
6641:
6642: Query a client in the hosts.tab table; "Are you there?"
6643:
6644: =item pong
6645:
6646: Respond to a ping query.
6647:
6648: =item ekey
6649:
6650: Read in encrypted key, make cipher. Respond with a buildkey.
6651:
6652: =item load
6653:
6654: Respond with CPU load based on a computation upon /proc/loadavg.
6655:
6656: =item currentauth
6657:
6658: Reply with current authentication information (only over an
6659: encrypted channel).
6660:
6661: =item auth
6662:
6663: Only over an encrypted channel, reply as to whether a user's
6664: authentication information can be validated.
6665:
6666: =item passwd
6667:
6668: Allow for a password to be set.
6669:
6670: =item makeuser
6671:
6672: Make a user.
6673:
6674: =item passwd
6675:
6676: Allow for authentication mechanism and password to be changed.
6677:
6678: =item home
6679:
6680: Respond to a question "are you the home for a given user?"
6681:
6682: =item update
6683:
6684: Update contents of a subscribed resource.
6685:
6686: =item unsubscribe
6687:
6688: The server is unsubscribing from a resource.
6689:
6690: =item subscribe
6691:
6692: The server is subscribing to a resource.
6693:
6694: =item log
6695:
6696: Place in B<logs/lond.log>
6697:
6698: =item put
6699:
6700: stores hash in namespace
6701:
6702: =item rolesputy
6703:
6704: put a role into a user's environment
6705:
6706: =item get
6707:
6708: returns hash with keys from array
6709: reference filled in from namespace
6710:
6711: =item eget
6712:
6713: returns hash with keys from array
6714: reference filled in from namesp (encrypts the return communication)
6715:
6716: =item rolesget
6717:
6718: get a role from a user's environment
6719:
6720: =item del
6721:
6722: deletes keys out of array from namespace
6723:
6724: =item keys
6725:
6726: returns namespace keys
6727:
6728: =item dump
6729:
6730: dumps the complete (or key matching regexp) namespace into a hash
6731:
6732: =item store
6733:
6734: stores hash permanently
6735: for this url; hashref needs to be given and should be a \%hashname; the
6736: remaining args aren't required and if they aren't passed or are '' they will
6737: be derived from the ENV
6738:
6739: =item restore
6740:
6741: returns a hash for a given url
6742:
6743: =item querysend
6744:
6745: Tells client about the lonsql process that has been launched in response
6746: to a sent query.
6747:
6748: =item queryreply
6749:
6750: Accept information from lonsql and make appropriate storage in temporary
6751: file space.
6752:
6753: =item idput
6754:
6755: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6756: for each student, defined perhaps by the institutional Registrar.)
6757:
6758: =item idget
6759:
6760: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6761: for each student, defined perhaps by the institutional Registrar.)
6762:
6763: =item tmpput
6764:
6765: Accept and store information in temporary space.
6766:
6767: =item tmpget
6768:
6769: Send along temporarily stored information.
6770:
6771: =item ls
6772:
6773: List part of a user's directory.
6774:
6775: =item pushtable
6776:
6777: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6778: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6779: must be restored manually in case of a problem with the new table file.
6780: pushtable requires that the request be encrypted and validated via
6781: ValidateManager. The form of the command is:
6782: enc:pushtable tablename <tablecontents> \n
6783: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6784: cleartext newline.
6785:
6786: =item Hanging up (exit or init)
6787:
6788: What to do when a client tells the server that they (the client)
6789: are leaving the network.
6790:
6791: =item unknown command
6792:
6793: If B<lond> is sent an unknown command (not in the list above),
6794: it replys to the client "unknown_cmd".
6795:
6796:
6797: =item UNKNOWN CLIENT
6798:
6799: If the anti-spoofing algorithm cannot verify the client,
6800: the client is rejected (with a "refused" message sent
6801: to the client, and the connection is closed.
6802:
6803: =back
6804:
6805: =head1 PREREQUISITES
6806:
6807: IO::Socket
6808: IO::File
6809: Apache::File
6810: POSIX
6811: Crypt::IDEA
6812: LWP::UserAgent()
6813: GDBM_File
6814: Authen::Krb4
6815: Authen::Krb5
6816:
6817: =head1 COREQUISITES
6818:
6819: =head1 OSNAMES
6820:
6821: linux
6822:
6823: =head1 SCRIPT CATEGORIES
6824:
6825: Server/Process
6826:
6827: =cut
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