1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.208 2004/07/23 13:36:29 albertel 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::Configuration;
35:
36: use IO::Socket;
37: use IO::File;
38: #use Apache::File;
39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
43: use GDBM_File;
44: use Authen::Krb4;
45: use Authen::Krb5;
46: use lib '/home/httpd/lib/perl/';
47: use localauth;
48: use localenroll;
49: use File::Copy;
50: use LONCAPA::ConfigFileEdit;
51: use LONCAPA::lonlocal;
52: use LONCAPA::lonssl;
53:
54: my $DEBUG = 0; # Non zero to enable debug log entries.
55:
56: my $status='';
57: my $lastlog='';
58:
59: my $VERSION='$Revision: 1.208 $'; #' stupid emacs
60: my $remoteVERSION;
61: my $currenthostid;
62: my $currentdomainid;
63:
64: my $client;
65: my $clientip; # IP address of client.
66: my $clientdns; # DNS name of client.
67: my $clientname; # LonCAPA name of client.
68:
69: my $server;
70: my $thisserver; # DNS of us.
71:
72: my $keymode;
73:
74: my $cipher; # Cipher key negotiated with client
75: my $tmpsnum = 0; # Id of tmpputs.
76:
77: #
78: # Connection type is:
79: # client - All client actions are allowed
80: # manager - only management functions allowed.
81: # both - Both management and client actions are allowed
82: #
83:
84: my $ConnectionType;
85:
86: my %hostid; # ID's for hosts in cluster by ip.
87: my %hostdom; # LonCAPA domain for hosts in cluster.
88: my %hostip; # IPs for hosts in cluster.
89: my %hostdns; # ID's of hosts looked up by DNS name.
90:
91: my %managers; # Ip -> manager names
92:
93: my %perlvar; # Will have the apache conf defined perl vars.
94:
95: #
96: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
97: # Each element of the hash contains a reference to an array that contains:
98: # A reference to a sub that executes the request corresponding to the keyword.
99: # A flag that is true if the request must be encoded to be acceptable.
100: # A mask with bits as follows:
101: # CLIENT_OK - Set when the function is allowed by ordinary clients
102: # MANAGER_OK - Set when the function is allowed to manager clients.
103: #
104: my $CLIENT_OK = 1;
105: my $MANAGER_OK = 2;
106: my %Dispatcher;
107:
108:
109: #
110: # The array below are password error strings."
111: #
112: my $lastpwderror = 13; # Largest error number from lcpasswd.
113: my @passwderrors = ("ok",
114: "lcpasswd must be run as user 'www'",
115: "lcpasswd got incorrect number of arguments",
116: "lcpasswd did not get the right nubmer of input text lines",
117: "lcpasswd too many simultaneous pwd changes in progress",
118: "lcpasswd User does not exist.",
119: "lcpasswd Incorrect current passwd",
120: "lcpasswd Unable to su to root.",
121: "lcpasswd Cannot set new passwd.",
122: "lcpasswd Username has invalid characters",
123: "lcpasswd Invalid characters in password",
124: "11", "12",
125: "lcpasswd Password mismatch");
126:
127:
128: # The array below are lcuseradd error strings.:
129:
130: my $lastadderror = 13;
131: my @adderrors = ("ok",
132: "User ID mismatch, lcuseradd must run as user www",
133: "lcuseradd Incorrect number of command line parameters must be 3",
134: "lcuseradd Incorrect number of stdinput lines, must be 3",
135: "lcuseradd Too many other simultaneous pwd changes in progress",
136: "lcuseradd User does not exist",
137: "lcuseradd Unable to make www member of users's group",
138: "lcuseradd Unable to su to root",
139: "lcuseradd Unable to set password",
140: "lcuseradd Usrname has invalid characters",
141: "lcuseradd Password has an invalid character",
142: "lcuseradd User already exists",
143: "lcuseradd Could not add user.",
144: "lcuseradd Password mismatch");
145:
146:
147:
148: #
149: # Statistics that are maintained and dislayed in the status line.
150: #
151: my $Transactions; # Number of attempted transactions.
152: my $Failures; # Number of transcations failed.
153:
154: # ResetStatistics:
155: # Resets the statistics counters:
156: #
157: sub ResetStatistics {
158: $Transactions = 0;
159: $Failures = 0;
160: }
161:
162:
163:
164: #------------------------------------------------------------------------
165: #
166: # LocalConnection
167: # Completes the formation of a locally authenticated connection.
168: # This function will ensure that the 'remote' client is really the
169: # local host. If not, the connection is closed, and the function fails.
170: # If so, initcmd is parsed for the name of a file containing the
171: # IDEA session key. The fie is opened, read, deleted and the session
172: # key returned to the caller.
173: #
174: # Parameters:
175: # $Socket - Socket open on client.
176: # $initcmd - The full text of the init command.
177: #
178: # Implicit inputs:
179: # $clientdns - The DNS name of the remote client.
180: # $thisserver - Our DNS name.
181: #
182: # Returns:
183: # IDEA session key on success.
184: # undef on failure.
185: #
186: sub LocalConnection {
187: my ($Socket, $initcmd) = @_;
188: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
189: if($clientdns ne $thisserver) {
190: &logthis('<font color="red"> LocalConnection rejecting non local: '
191: ."$clientdns ne $thisserver </font>");
192: close $Socket;
193: return undef;
194: }
195: else {
196: chomp($initcmd); # Get rid of \n in filename.
197: my ($init, $type, $name) = split(/:/, $initcmd);
198: Debug(" Init command: $init $type $name ");
199:
200: # Require that $init = init, and $type = local: Otherwise
201: # the caller is insane:
202:
203: if(($init ne "init") && ($type ne "local")) {
204: &logthis('<font color = "red"> LocalConnection: caller is insane! '
205: ."init = $init, and type = $type </font>");
206: close($Socket);;
207: return undef;
208:
209: }
210: # Now get the key filename:
211:
212: my $IDEAKey = lonlocal::ReadKeyFile($name);
213: return $IDEAKey;
214: }
215: }
216: #------------------------------------------------------------------------------
217: #
218: # SSLConnection
219: # Completes the formation of an ssh authenticated connection. The
220: # socket is promoted to an ssl socket. If this promotion and the associated
221: # certificate exchange are successful, the IDEA key is generated and sent
222: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
223: # the caller after the SSL tunnel is torn down.
224: #
225: # Parameters:
226: # Name Type Purpose
227: # $Socket IO::Socket::INET Plaintext socket.
228: #
229: # Returns:
230: # IDEA key on success.
231: # undef on failure.
232: #
233: sub SSLConnection {
234: my $Socket = shift;
235:
236: Debug("SSLConnection: ");
237: my $KeyFile = lonssl::KeyFile();
238: if(!$KeyFile) {
239: my $err = lonssl::LastError();
240: &logthis("<font color=\"red\"> CRITICAL"
241: ."Can't get key file $err </font>");
242: return undef;
243: }
244: my ($CACertificate,
245: $Certificate) = lonssl::CertificateFile();
246:
247:
248: # If any of the key, certificate or certificate authority
249: # certificate filenames are not defined, this can't work.
250:
251: if((!$Certificate) || (!$CACertificate)) {
252: my $err = lonssl::LastError();
253: &logthis("<font color=\"red\"> CRITICAL"
254: ."Can't get certificates: $err </font>");
255:
256: return undef;
257: }
258: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
259:
260: # Indicate to our peer that we can procede with
261: # a transition to ssl authentication:
262:
263: print $Socket "ok:ssl\n";
264:
265: Debug("Approving promotion -> ssl");
266: # And do so:
267:
268: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
269: $CACertificate,
270: $Certificate,
271: $KeyFile);
272: if(! ($SSLSocket) ) { # SSL socket promotion failed.
273: my $err = lonssl::LastError();
274: &logthis("<font color=\"red\"> CRITICAL "
275: ."SSL Socket promotion failed: $err </font>");
276: return undef;
277: }
278: Debug("SSL Promotion successful");
279:
280: #
281: # The only thing we'll use the socket for is to send the IDEA key
282: # to the peer:
283:
284: my $Key = lonlocal::CreateCipherKey();
285: print $SSLSocket "$Key\n";
286:
287: lonssl::Close($SSLSocket);
288:
289: Debug("Key exchange complete: $Key");
290:
291: return $Key;
292: }
293: #
294: # InsecureConnection:
295: # If insecure connections are allowd,
296: # exchange a challenge with the client to 'validate' the
297: # client (not really, but that's the protocol):
298: # We produce a challenge string that's sent to the client.
299: # The client must then echo the challenge verbatim to us.
300: #
301: # Parameter:
302: # Socket - Socket open on the client.
303: # Returns:
304: # 1 - success.
305: # 0 - failure (e.g.mismatch or insecure not allowed).
306: #
307: sub InsecureConnection {
308: my $Socket = shift;
309:
310: # Don't even start if insecure connections are not allowed.
311:
312: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
313: return 0;
314: }
315:
316: # Fabricate a challenge string and send it..
317:
318: my $challenge = "$$".time; # pid + time.
319: print $Socket "$challenge\n";
320: &status("Waiting for challenge reply");
321:
322: my $answer = <$Socket>;
323: $answer =~s/\W//g;
324: if($challenge eq $answer) {
325: return 1;
326: }
327: else {
328: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
329: &status("No challenge reqply");
330: return 0;
331: }
332:
333:
334: }
335:
336: #
337: # GetCertificate: Given a transaction that requires a certificate,
338: # this function will extract the certificate from the transaction
339: # request. Note that at this point, the only concept of a certificate
340: # is the hostname to which we are connected.
341: #
342: # Parameter:
343: # request - The request sent by our client (this parameterization may
344: # need to change when we really use a certificate granting
345: # authority.
346: #
347: sub GetCertificate {
348: my $request = shift;
349:
350: return $clientip;
351: }
352:
353: #
354: # Return true if client is a manager.
355: #
356: sub isManager {
357: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
358: }
359: #
360: # Return tru if client can do client functions
361: #
362: sub isClient {
363: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
364: }
365:
366:
367: #
368: # ReadManagerTable: Reads in the current manager table. For now this is
369: # done on each manager authentication because:
370: # - These authentications are not frequent
371: # - This allows dynamic changes to the manager table
372: # without the need to signal to the lond.
373: #
374:
375: sub ReadManagerTable {
376:
377: # Clean out the old table first..
378:
379: foreach my $key (keys %managers) {
380: delete $managers{$key};
381: }
382:
383: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
384: if (!open (MANAGERS, $tablename)) {
385: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
386: return;
387: }
388: while(my $host = <MANAGERS>) {
389: chomp($host);
390: if ($host =~ "^#") { # Comment line.
391: next;
392: }
393: if (!defined $hostip{$host}) { # This is a non cluster member
394: # The entry is of the form:
395: # cluname:hostname
396: # cluname - A 'cluster hostname' is needed in order to negotiate
397: # the host key.
398: # hostname- The dns name of the host.
399: #
400: my($cluname, $dnsname) = split(/:/, $host);
401:
402: my $ip = gethostbyname($dnsname);
403: if(defined($ip)) { # bad names don't deserve entry.
404: my $hostip = inet_ntoa($ip);
405: $managers{$hostip} = $cluname;
406: logthis('<font color="green"> registering manager '.
407: "$dnsname as $cluname with $hostip </font>\n");
408: }
409: } else {
410: logthis('<font color="green"> existing host'." $host</font>\n");
411: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
412: }
413: }
414: }
415:
416: #
417: # ValidManager: Determines if a given certificate represents a valid manager.
418: # in this primitive implementation, the 'certificate' is
419: # just the connecting loncapa client name. This is checked
420: # against a valid client list in the configuration.
421: #
422: #
423: sub ValidManager {
424: my $certificate = shift;
425:
426: return isManager;
427: }
428: #
429: # CopyFile: Called as part of the process of installing a
430: # new configuration file. This function copies an existing
431: # file to a backup file.
432: # Parameters:
433: # oldfile - Name of the file to backup.
434: # newfile - Name of the backup file.
435: # Return:
436: # 0 - Failure (errno has failure reason).
437: # 1 - Success.
438: #
439: sub CopyFile {
440:
441: my ($oldfile, $newfile) = @_;
442:
443: # The file must exist:
444:
445: if(-e $oldfile) {
446:
447: # Read the old file.
448:
449: my $oldfh = IO::File->new("< $oldfile");
450: if(!$oldfh) {
451: return 0;
452: }
453: my @contents = <$oldfh>; # Suck in the entire file.
454:
455: # write the backup file:
456:
457: my $newfh = IO::File->new("> $newfile");
458: if(!(defined $newfh)){
459: return 0;
460: }
461: my $lines = scalar @contents;
462: for (my $i =0; $i < $lines; $i++) {
463: print $newfh ($contents[$i]);
464: }
465:
466: $oldfh->close;
467: $newfh->close;
468:
469: chmod(0660, $newfile);
470:
471: return 1;
472:
473: } else {
474: return 0;
475: }
476: }
477: #
478: # Host files are passed out with externally visible host IPs.
479: # If, for example, we are behind a fire-wall or NAT host, our
480: # internally visible IP may be different than the externally
481: # visible IP. Therefore, we always adjust the contents of the
482: # host file so that the entry for ME is the IP that we believe
483: # we have. At present, this is defined as the entry that
484: # DNS has for us. If by some chance we are not able to get a
485: # DNS translation for us, then we assume that the host.tab file
486: # is correct.
487: # BUGBUGBUG - in the future, we really should see if we can
488: # easily query the interface(s) instead.
489: # Parameter(s):
490: # contents - The contents of the host.tab to check.
491: # Returns:
492: # newcontents - The adjusted contents.
493: #
494: #
495: sub AdjustHostContents {
496: my $contents = shift;
497: my $adjusted;
498: my $me = $perlvar{'lonHostID'};
499:
500: foreach my $line (split(/\n/,$contents)) {
501: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
502: chomp($line);
503: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
504: if ($id eq $me) {
505: my $ip = gethostbyname($name);
506: my $ipnew = inet_ntoa($ip);
507: $ip = $ipnew;
508: # Reconstruct the host line and append to adjusted:
509:
510: my $newline = "$id:$domain:$role:$name:$ip";
511: if($maxcon ne "") { # Not all hosts have loncnew tuning params
512: $newline .= ":$maxcon:$idleto:$mincon";
513: }
514: $adjusted .= $newline."\n";
515:
516: } else { # Not me, pass unmodified.
517: $adjusted .= $line."\n";
518: }
519: } else { # Blank or comment never re-written.
520: $adjusted .= $line."\n"; # Pass blanks and comments as is.
521: }
522: }
523: return $adjusted;
524: }
525: #
526: # InstallFile: Called to install an administrative file:
527: # - The file is created with <name>.tmp
528: # - The <name>.tmp file is then mv'd to <name>
529: # This lugubrious procedure is done to ensure that we are never without
530: # a valid, even if dated, version of the file regardless of who crashes
531: # and when the crash occurs.
532: #
533: # Parameters:
534: # Name of the file
535: # File Contents.
536: # Return:
537: # nonzero - success.
538: # 0 - failure and $! has an errno.
539: #
540: sub InstallFile {
541:
542: my ($Filename, $Contents) = @_;
543: my $TempFile = $Filename.".tmp";
544:
545: # Open the file for write:
546:
547: my $fh = IO::File->new("> $TempFile"); # Write to temp.
548: if(!(defined $fh)) {
549: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
550: return 0;
551: }
552: # write the contents of the file:
553:
554: print $fh ($Contents);
555: $fh->close; # In case we ever have a filesystem w. locking
556:
557: chmod(0660, $TempFile);
558:
559: # Now we can move install the file in position.
560:
561: move($TempFile, $Filename);
562:
563: return 1;
564: }
565:
566:
567: #
568: # ConfigFileFromSelector: converts a configuration file selector
569: # (one of host or domain at this point) into a
570: # configuration file pathname.
571: #
572: # Parameters:
573: # selector - Configuration file selector.
574: # Returns:
575: # Full path to the file or undef if the selector is invalid.
576: #
577: sub ConfigFileFromSelector {
578: my $selector = shift;
579: my $tablefile;
580:
581: my $tabledir = $perlvar{'lonTabDir'}.'/';
582: if ($selector eq "hosts") {
583: $tablefile = $tabledir."hosts.tab";
584: } elsif ($selector eq "domain") {
585: $tablefile = $tabledir."domain.tab";
586: } else {
587: return undef;
588: }
589: return $tablefile;
590:
591: }
592: #
593: # PushFile: Called to do an administrative push of a file.
594: # - Ensure the file being pushed is one we support.
595: # - Backup the old file to <filename.saved>
596: # - Separate the contents of the new file out from the
597: # rest of the request.
598: # - Write the new file.
599: # Parameter:
600: # Request - The entire user request. This consists of a : separated
601: # string pushfile:tablename:contents.
602: # NOTE: The contents may have :'s in it as well making things a bit
603: # more interesting... but not much.
604: # Returns:
605: # String to send to client ("ok" or "refused" if bad file).
606: #
607: sub PushFile {
608: my $request = shift;
609: my ($command, $filename, $contents) = split(":", $request, 3);
610:
611: # At this point in time, pushes for only the following tables are
612: # supported:
613: # hosts.tab ($filename eq host).
614: # domain.tab ($filename eq domain).
615: # Construct the destination filename or reject the request.
616: #
617: # lonManage is supposed to ensure this, however this session could be
618: # part of some elaborate spoof that managed somehow to authenticate.
619: #
620:
621:
622: my $tablefile = ConfigFileFromSelector($filename);
623: if(! (defined $tablefile)) {
624: return "refused";
625: }
626: #
627: # >copy< the old table to the backup table
628: # don't rename in case system crashes/reboots etc. in the time
629: # window between a rename and write.
630: #
631: my $backupfile = $tablefile;
632: $backupfile =~ s/\.tab$/.old/;
633: if(!CopyFile($tablefile, $backupfile)) {
634: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
635: return "error:$!";
636: }
637: &logthis('<font color="green"> Pushfile: backed up '
638: .$tablefile." to $backupfile</font>");
639:
640: # If the file being pushed is the host file, we adjust the entry for ourself so that the
641: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
642: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
643: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
644: # that possibilty.
645:
646: if($filename eq "host") {
647: $contents = AdjustHostContents($contents);
648: }
649:
650: # Install the new file:
651:
652: if(!InstallFile($tablefile, $contents)) {
653: &logthis('<font color="red"> Pushfile: unable to install '
654: .$tablefile." $! </font>");
655: return "error:$!";
656: }
657: else {
658: &logthis('<font color="green"> Installed new '.$tablefile
659: ."</font>");
660:
661: }
662:
663:
664: # Indicate success:
665:
666: return "ok";
667:
668: }
669:
670: #
671: # Called to re-init either lonc or lond.
672: #
673: # Parameters:
674: # request - The full request by the client. This is of the form
675: # reinit:<process>
676: # where <process> is allowed to be either of
677: # lonc or lond
678: #
679: # Returns:
680: # The string to be sent back to the client either:
681: # ok - Everything worked just fine.
682: # error:why - There was a failure and why describes the reason.
683: #
684: #
685: sub ReinitProcess {
686: my $request = shift;
687:
688:
689: # separate the request (reinit) from the process identifier and
690: # validate it producing the name of the .pid file for the process.
691: #
692: #
693: my ($junk, $process) = split(":", $request);
694: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
695: if($process eq 'lonc') {
696: $processpidfile = $processpidfile."lonc.pid";
697: if (!open(PIDFILE, "< $processpidfile")) {
698: return "error:Open failed for $processpidfile";
699: }
700: my $loncpid = <PIDFILE>;
701: close(PIDFILE);
702: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
703: ."</font>");
704: kill("USR2", $loncpid);
705: } elsif ($process eq 'lond') {
706: logthis('<font color="red"> Reinitializing self (lond) </font>');
707: &UpdateHosts; # Lond is us!!
708: } else {
709: &logthis('<font color="yellow" Invalid reinit request for '.$process
710: ."</font>");
711: return "error:Invalid process identifier $process";
712: }
713: return 'ok';
714: }
715: # Validate a line in a configuration file edit script:
716: # Validation includes:
717: # - Ensuring the command is valid.
718: # - Ensuring the command has sufficient parameters
719: # Parameters:
720: # scriptline - A line to validate (\n has been stripped for what it's worth).
721: #
722: # Return:
723: # 0 - Invalid scriptline.
724: # 1 - Valid scriptline
725: # NOTE:
726: # Only the command syntax is checked, not the executability of the
727: # command.
728: #
729: sub isValidEditCommand {
730: my $scriptline = shift;
731:
732: # Line elements are pipe separated:
733:
734: my ($command, $key, $newline) = split(/\|/, $scriptline);
735: &logthis('<font color="green"> isValideditCommand checking: '.
736: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
737:
738: if ($command eq "delete") {
739: #
740: # key with no newline.
741: #
742: if( ($key eq "") || ($newline ne "")) {
743: return 0; # Must have key but no newline.
744: } else {
745: return 1; # Valid syntax.
746: }
747: } elsif ($command eq "replace") {
748: #
749: # key and newline:
750: #
751: if (($key eq "") || ($newline eq "")) {
752: return 0;
753: } else {
754: return 1;
755: }
756: } elsif ($command eq "append") {
757: if (($key ne "") && ($newline eq "")) {
758: return 1;
759: } else {
760: return 0;
761: }
762: } else {
763: return 0; # Invalid command.
764: }
765: return 0; # Should not get here!!!
766: }
767: #
768: # ApplyEdit - Applies an edit command to a line in a configuration
769: # file. It is the caller's responsiblity to validate the
770: # edit line.
771: # Parameters:
772: # $directive - A single edit directive to apply.
773: # Edit directives are of the form:
774: # append|newline - Appends a new line to the file.
775: # replace|key|newline - Replaces the line with key value 'key'
776: # delete|key - Deletes the line with key value 'key'.
777: # $editor - A config file editor object that contains the
778: # file being edited.
779: #
780: sub ApplyEdit {
781:
782: my ($directive, $editor) = @_;
783:
784: # Break the directive down into its command and its parameters
785: # (at most two at this point. The meaning of the parameters, if in fact
786: # they exist depends on the command).
787:
788: my ($command, $p1, $p2) = split(/\|/, $directive);
789:
790: if($command eq "append") {
791: $editor->Append($p1); # p1 - key p2 null.
792: } elsif ($command eq "replace") {
793: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
794: } elsif ($command eq "delete") {
795: $editor->DeleteLine($p1); # p1 - key p2 null.
796: } else { # Should not get here!!!
797: die "Invalid command given to ApplyEdit $command"
798: }
799: }
800: #
801: # AdjustOurHost:
802: # Adjusts a host file stored in a configuration file editor object
803: # for the true IP address of this host. This is necessary for hosts
804: # that live behind a firewall.
805: # Those hosts have a publicly distributed IP of the firewall, but
806: # internally must use their actual IP. We assume that a given
807: # host only has a single IP interface for now.
808: # Formal Parameters:
809: # editor - The configuration file editor to adjust. This
810: # editor is assumed to contain a hosts.tab file.
811: # Strategy:
812: # - Figure out our hostname.
813: # - Lookup the entry for this host.
814: # - Modify the line to contain our IP
815: # - Do a replace for this host.
816: sub AdjustOurHost {
817: my $editor = shift;
818:
819: # figure out who I am.
820:
821: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
822:
823: # Get my host file entry.
824:
825: my $ConfigLine = $editor->Find($myHostName);
826: if(! (defined $ConfigLine)) {
827: die "AdjustOurHost - no entry for me in hosts file $myHostName";
828: }
829: # figure out my IP:
830: # Use the config line to get my hostname.
831: # Use gethostbyname to translate that into an IP address.
832: #
833: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
834: my $BinaryIp = gethostbyname($name);
835: my $ip = inet_ntoa($ip);
836: #
837: # Reassemble the config line from the elements in the list.
838: # Note that if the loncnew items were not present before, they will
839: # be now even if they would be empty
840: #
841: my $newConfigLine = $id;
842: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
843: $newConfigLine .= ":".$item;
844: }
845: # Replace the line:
846:
847: $editor->ReplaceLine($id, $newConfigLine);
848:
849: }
850: #
851: # ReplaceConfigFile:
852: # Replaces a configuration file with the contents of a
853: # configuration file editor object.
854: # This is done by:
855: # - Copying the target file to <filename>.old
856: # - Writing the new file to <filename>.tmp
857: # - Moving <filename.tmp> -> <filename>
858: # This laborious process ensures that the system is never without
859: # a configuration file that's at least valid (even if the contents
860: # may be dated).
861: # Parameters:
862: # filename - Name of the file to modify... this is a full path.
863: # editor - Editor containing the file.
864: #
865: sub ReplaceConfigFile {
866:
867: my ($filename, $editor) = @_;
868:
869: CopyFile ($filename, $filename.".old");
870:
871: my $contents = $editor->Get(); # Get the contents of the file.
872:
873: InstallFile($filename, $contents);
874: }
875: #
876: #
877: # Called to edit a configuration table file
878: # Parameters:
879: # request - The entire command/request sent by lonc or lonManage
880: # Return:
881: # The reply to send to the client.
882: #
883: sub EditFile {
884: my $request = shift;
885:
886: # Split the command into it's pieces: edit:filetype:script
887:
888: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
889:
890: # Check the pre-coditions for success:
891:
892: if($request != "edit") { # Something is amiss afoot alack.
893: return "error:edit request detected, but request != 'edit'\n";
894: }
895: if( ($filetype ne "hosts") &&
896: ($filetype ne "domain")) {
897: return "error:edit requested with invalid file specifier: $filetype \n";
898: }
899:
900: # Split the edit script and check it's validity.
901:
902: my @scriptlines = split(/\n/, $script); # one line per element.
903: my $linecount = scalar(@scriptlines);
904: for(my $i = 0; $i < $linecount; $i++) {
905: chomp($scriptlines[$i]);
906: if(!isValidEditCommand($scriptlines[$i])) {
907: return "error:edit with bad script line: '$scriptlines[$i]' \n";
908: }
909: }
910:
911: # Execute the edit operation.
912: # - Create a config file editor for the appropriate file and
913: # - execute each command in the script:
914: #
915: my $configfile = ConfigFileFromSelector($filetype);
916: if (!(defined $configfile)) {
917: return "refused\n";
918: }
919: my $editor = ConfigFileEdit->new($configfile);
920:
921: for (my $i = 0; $i < $linecount; $i++) {
922: ApplyEdit($scriptlines[$i], $editor);
923: }
924: # If the file is the host file, ensure that our host is
925: # adjusted to have our ip:
926: #
927: if($filetype eq "host") {
928: AdjustOurHost($editor);
929: }
930: # Finally replace the current file with our file.
931: #
932: ReplaceConfigFile($configfile, $editor);
933:
934: return "ok\n";
935: }
936:
937: #---------------------------------------------------------------
938: #
939: # Manipulation of hash based databases (factoring out common code
940: # for later use as we refactor.
941: #
942: # Ties a domain level resource file to a hash.
943: # If requested a history entry is created in the associated hist file.
944: #
945: # Parameters:
946: # domain - Name of the domain in which the resource file lives.
947: # namespace - Name of the hash within that domain.
948: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
949: # loghead - Optional parameter, if present a log entry is created
950: # in the associated history file and this is the first part
951: # of that entry.
952: # logtail - Goes along with loghead, The actual logentry is of the
953: # form $loghead:<timestamp>:logtail.
954: # Returns:
955: # Reference to a hash bound to the db file or alternatively undef
956: # if the tie failed.
957: #
958: sub TieDomainHash {
959: my ($domain,
960: $namespace,
961: $how) = @_;
962:
963: # Filter out any whitespace in the domain name:
964:
965: $domain =~ s/\W//g;
966:
967: # We have enough to go on to tie the hash:
968:
969: my $user_top_dir = $perlvar{'lonUsersDir'};
970: my $domain_dir = $user_top_dir."/$domain";
971: my $resource_file = $domain_dir."/$namespace.db";
972: my %hash;
973: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
974: if (scalar @_) { # Need to log the operation.
975: my $logFh = IO::File->new(">>domain_dir/$namespace.hist");
976: if($logFh) {
977: my $timestamp = time;
978: my ($loghead, $logtail) = @_;
979: print $logFh "$loghead:$timestamp:$logtail\n";
980: }
981: }
982: return \%hash; # Return the tied hash.
983: }
984: else {
985: return undef; # Tie failed.
986: }
987: }
988:
989: #
990: # Ties a user's resource file to a hash.
991: # If necessary, an appropriate history
992: # log file entry is made as well.
993: # This sub factors out common code from the subs that manipulate
994: # the various gdbm files that keep keyword value pairs.
995: # Parameters:
996: # domain - Name of the domain the user is in.
997: # user - Name of the 'current user'.
998: # namespace - Namespace representing the file to tie.
999: # how - What the tie is done to (e.g. GDBM_WRCREAT().
1000: # loghead - Optional first part of log entry if there may be a
1001: # history file.
1002: # what - Optional tail of log entry if there may be a history
1003: # file.
1004: # Returns:
1005: # hash to which the database is tied. It's up to the caller to untie.
1006: # undef if the has could not be tied.
1007: #
1008: sub TieUserHash {
1009: my ($domain,
1010: $user,
1011: $namespace,
1012: $how) = @_;
1013:
1014:
1015: $namespace=~s/\//\_/g; # / -> _
1016: $namespace=~s/\W//g; # whitespace eliminated.
1017: my $proname = propath($domain, $user);
1018:
1019: # If this is a namespace for which a history is kept,
1020: # make the history log entry:
1021:
1022:
1023: if (($namespace =~/^nohist\_/) && (scalar @_ > 0)) {
1024: my $args = scalar @_;
1025: Debug(" Opening history: $namespace $args");
1026: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1027: if($hfh) {
1028: my $now = time;
1029: my $loghead = shift;
1030: my $what = shift;
1031: print $hfh "$loghead:$now:$what\n";
1032: }
1033: }
1034: # Tie the database.
1035:
1036: my %hash;
1037: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1038: $how, 0640)) {
1039: return \%hash;
1040: }
1041: else {
1042: return undef;
1043: }
1044:
1045: }
1046: #---------------------------------------------------------------
1047: #
1048: # Getting, decoding and dispatching requests:
1049: #
1050:
1051: #
1052: # Get a Request:
1053: # Gets a Request message from the client. The transaction
1054: # is defined as a 'line' of text. We remove the new line
1055: # from the text line.
1056: #
1057: sub GetRequest {
1058: my $input = <$client>;
1059: chomp($input);
1060:
1061: Debug("Request = $input\n");
1062:
1063: &status('Processing '.$clientname.':'.$input);
1064:
1065: return $input;
1066: }
1067: #
1068: # Decipher encoded traffic
1069: # Parameters:
1070: # input - Encoded data.
1071: # Returns:
1072: # Decoded data or undef if encryption key was not yet negotiated.
1073: # Implicit input:
1074: # cipher - This global holds the negotiated encryption key.
1075: #
1076: sub Decipher {
1077: my ($input) = @_;
1078: my $output = '';
1079:
1080:
1081: if($cipher) {
1082: my($enc, $enclength, $encinput) = split(/:/, $input);
1083: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
1084: $output .=
1085: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
1086: }
1087: return substr($output, 0, $enclength);
1088: } else {
1089: return undef;
1090: }
1091: }
1092:
1093: #
1094: # Register a command processor. This function is invoked to register a sub
1095: # to process a request. Once registered, the ProcessRequest sub can automatically
1096: # dispatch requests to an appropriate sub, and do the top level validity checking
1097: # as well:
1098: # - Is the keyword recognized.
1099: # - Is the proper client type attempting the request.
1100: # - Is the request encrypted if it has to be.
1101: # Parameters:
1102: # $request_name - Name of the request being registered.
1103: # This is the command request that will match
1104: # against the hash keywords to lookup the information
1105: # associated with the dispatch information.
1106: # $procedure - Reference to a sub to call to process the request.
1107: # All subs get called as follows:
1108: # Procedure($cmd, $tail, $replyfd, $key)
1109: # $cmd - the actual keyword that invoked us.
1110: # $tail - the tail of the request that invoked us.
1111: # $replyfd- File descriptor connected to the client
1112: # $must_encode - True if the request must be encoded to be good.
1113: # $client_ok - True if it's ok for a client to request this.
1114: # $manager_ok - True if it's ok for a manager to request this.
1115: # Side effects:
1116: # - On success, the Dispatcher hash has an entry added for the key $RequestName
1117: # - On failure, the program will die as it's a bad internal bug to try to
1118: # register a duplicate command handler.
1119: #
1120: sub RegisterHandler {
1121: my ($request_name,
1122: $procedure,
1123: $must_encode,
1124: $client_ok,
1125: $manager_ok) = @_;
1126:
1127: # Don't allow duplication#
1128:
1129: if (defined $Dispatcher{$request_name}) {
1130: die "Attempting to define a duplicate request handler for $request_name\n";
1131: }
1132: # Build the client type mask:
1133:
1134: my $client_type_mask = 0;
1135: if($client_ok) {
1136: $client_type_mask |= $CLIENT_OK;
1137: }
1138: if($manager_ok) {
1139: $client_type_mask |= $MANAGER_OK;
1140: }
1141:
1142: # Enter the hash:
1143:
1144: my @entry = ($procedure, $must_encode, $client_type_mask);
1145:
1146: $Dispatcher{$request_name} = \@entry;
1147:
1148:
1149: }
1150:
1151:
1152: #------------------------------------------------------------------
1153:
1154:
1155:
1156:
1157: #
1158: # Convert an error return code from lcpasswd to a string value.
1159: #
1160: sub lcpasswdstrerror {
1161: my $ErrorCode = shift;
1162: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1163: return "lcpasswd Unrecognized error return value ".$ErrorCode;
1164: } else {
1165: return $passwderrors[$ErrorCode];
1166: }
1167: }
1168:
1169: #
1170: # Convert an error return code from lcuseradd to a string value:
1171: #
1172: sub lcuseraddstrerror {
1173: my $ErrorCode = shift;
1174: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
1175: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
1176: } else {
1177: return $adderrors[$ErrorCode];
1178: }
1179: }
1180:
1181: # grabs exception and records it to log before exiting
1182: sub catchexception {
1183: my ($error)=@_;
1184: $SIG{'QUIT'}='DEFAULT';
1185: $SIG{__DIE__}='DEFAULT';
1186: &status("Catching exception");
1187: &logthis("<font color='red'>CRITICAL: "
1188: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1189: ."a crash with this error msg->[$error]</font>");
1190: &logthis('Famous last words: '.$status.' - '.$lastlog);
1191: if ($client) { print $client "error: $error\n"; }
1192: $server->close();
1193: die($error);
1194: }
1195:
1196: sub timeout {
1197: &status("Handling Timeout");
1198: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1199: &catchexception('Timeout');
1200: }
1201: # -------------------------------- Set signal handlers to record abnormal exits
1202:
1203: $SIG{'QUIT'}=\&catchexception;
1204: $SIG{__DIE__}=\&catchexception;
1205:
1206: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1207: &status("Read loncapa.conf and loncapa_apache.conf");
1208: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1209: %perlvar=%{$perlvarref};
1210: undef $perlvarref;
1211:
1212: # ----------------------------- Make sure this process is running from user=www
1213: my $wwwid=getpwnam('www');
1214: if ($wwwid!=$<) {
1215: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
1216: my $subj="LON: $currenthostid User ID mismatch";
1217: system("echo 'User ID mismatch. lond must be run as user www.' |\
1218: mailto $emailto -s '$subj' > /dev/null");
1219: exit 1;
1220: }
1221:
1222: # --------------------------------------------- Check if other instance running
1223:
1224: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
1225:
1226: if (-e $pidfile) {
1227: my $lfh=IO::File->new("$pidfile");
1228: my $pide=<$lfh>;
1229: chomp($pide);
1230: if (kill 0 => $pide) { die "already running"; }
1231: }
1232:
1233: # ------------------------------------------------------------- Read hosts file
1234:
1235:
1236:
1237: # establish SERVER socket, bind and listen.
1238: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
1239: Type => SOCK_STREAM,
1240: Proto => 'tcp',
1241: Reuse => 1,
1242: Listen => 10 )
1243: or die "making socket: $@\n";
1244:
1245: # --------------------------------------------------------- Do global variables
1246:
1247: # global variables
1248:
1249: my %children = (); # keys are current child process IDs
1250:
1251: sub REAPER { # takes care of dead children
1252: $SIG{CHLD} = \&REAPER;
1253: &status("Handling child death");
1254: my $pid;
1255: do {
1256: $pid = waitpid(-1,&WNOHANG());
1257: if (defined($children{$pid})) {
1258: &logthis("Child $pid died");
1259: delete($children{$pid});
1260: } elsif ($pid > 0) {
1261: &logthis("Unknown Child $pid died");
1262: }
1263: } while ( $pid > 0 );
1264: foreach my $child (keys(%children)) {
1265: $pid = waitpid($child,&WNOHANG());
1266: if ($pid > 0) {
1267: &logthis("Child $child - $pid looks like we missed it's death");
1268: delete($children{$pid});
1269: }
1270: }
1271: &status("Finished Handling child death");
1272: }
1273:
1274: sub HUNTSMAN { # signal handler for SIGINT
1275: &status("Killing children (INT)");
1276: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1277: kill 'INT' => keys %children;
1278: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1279: my $execdir=$perlvar{'lonDaemons'};
1280: unlink("$execdir/logs/lond.pid");
1281: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1282: &status("Done killing children");
1283: exit; # clean up with dignity
1284: }
1285:
1286: sub HUPSMAN { # signal handler for SIGHUP
1287: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1288: &status("Killing children for restart (HUP)");
1289: kill 'INT' => keys %children;
1290: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1291: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1292: my $execdir=$perlvar{'lonDaemons'};
1293: unlink("$execdir/logs/lond.pid");
1294: &status("Restarting self (HUP)");
1295: exec("$execdir/lond"); # here we go again
1296: }
1297:
1298: #
1299: # Kill off hashes that describe the host table prior to re-reading it.
1300: # Hashes affected are:
1301: # %hostid, %hostdom %hostip %hostdns.
1302: #
1303: sub KillHostHashes {
1304: foreach my $key (keys %hostid) {
1305: delete $hostid{$key};
1306: }
1307: foreach my $key (keys %hostdom) {
1308: delete $hostdom{$key};
1309: }
1310: foreach my $key (keys %hostip) {
1311: delete $hostip{$key};
1312: }
1313: foreach my $key (keys %hostdns) {
1314: delete $hostdns{$key};
1315: }
1316: }
1317: #
1318: # Read in the host table from file and distribute it into the various hashes:
1319: #
1320: # - %hostid - Indexed by IP, the loncapa hostname.
1321: # - %hostdom - Indexed by loncapa hostname, the domain.
1322: # - %hostip - Indexed by hostid, the Ip address of the host.
1323: sub ReadHostTable {
1324:
1325: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1326: my $myloncapaname = $perlvar{'lonHostID'};
1327: Debug("My loncapa name is : $myloncapaname");
1328: while (my $configline=<CONFIG>) {
1329: if (!($configline =~ /^\s*\#/)) {
1330: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1331: chomp($ip); $ip=~s/\D+$//;
1332: $hostid{$ip}=$id; # LonCAPA name of host by IP.
1333: $hostdom{$id}=$domain; # LonCAPA domain name of host.
1334: $hostip{$id}=$ip; # IP address of host.
1335: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
1336:
1337: if ($id eq $perlvar{'lonHostID'}) {
1338: Debug("Found me in the host table: $name");
1339: $thisserver=$name;
1340: }
1341: }
1342: }
1343: close(CONFIG);
1344: }
1345: #
1346: # Reload the Apache daemon's state.
1347: # This is done by invoking /home/httpd/perl/apachereload
1348: # a setuid perl script that can be root for us to do this job.
1349: #
1350: sub ReloadApache {
1351: my $execdir = $perlvar{'lonDaemons'};
1352: my $script = $execdir."/apachereload";
1353: system($script);
1354: }
1355:
1356: #
1357: # Called in response to a USR2 signal.
1358: # - Reread hosts.tab
1359: # - All children connected to hosts that were removed from hosts.tab
1360: # are killed via SIGINT
1361: # - All children connected to previously existing hosts are sent SIGUSR1
1362: # - Our internal hosts hash is updated to reflect the new contents of
1363: # hosts.tab causing connections from hosts added to hosts.tab to
1364: # now be honored.
1365: #
1366: sub UpdateHosts {
1367: &status("Reload hosts.tab");
1368: logthis('<font color="blue"> Updating connections </font>');
1369: #
1370: # The %children hash has the set of IP's we currently have children
1371: # on. These need to be matched against records in the hosts.tab
1372: # Any ip's no longer in the table get killed off they correspond to
1373: # either dropped or changed hosts. Note that the re-read of the table
1374: # will take care of new and changed hosts as connections come into being.
1375:
1376:
1377: KillHostHashes;
1378: ReadHostTable;
1379:
1380: foreach my $child (keys %children) {
1381: my $childip = $children{$child};
1382: if(!$hostid{$childip}) {
1383: logthis('<font color="blue"> UpdateHosts killing child '
1384: ." $child for ip $childip </font>");
1385: kill('INT', $child);
1386: } else {
1387: logthis('<font color="green"> keeping child for ip '
1388: ." $childip (pid=$child) </font>");
1389: }
1390: }
1391: ReloadApache;
1392: &status("Finished reloading hosts.tab");
1393: }
1394:
1395:
1396: sub checkchildren {
1397: &status("Checking on the children (sending signals)");
1398: &initnewstatus();
1399: &logstatus();
1400: &logthis('Going to check on the children');
1401: my $docdir=$perlvar{'lonDocRoot'};
1402: foreach (sort keys %children) {
1403: sleep 1;
1404: unless (kill 'USR1' => $_) {
1405: &logthis ('Child '.$_.' is dead');
1406: &logstatus($$.' is dead');
1407: }
1408: }
1409: sleep 5;
1410: $SIG{ALRM} = sub { die "timeout" };
1411: $SIG{__DIE__} = 'DEFAULT';
1412: &status("Checking on the children (waiting for reports)");
1413: foreach (sort keys %children) {
1414: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1415: eval {
1416: alarm(300);
1417: &logthis('Child '.$_.' did not respond');
1418: kill 9 => $_;
1419: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
1420: #$subj="LON: $currenthostid killed lond process $_";
1421: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
1422: #$execdir=$perlvar{'lonDaemons'};
1423: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1424: alarm(0);
1425: }
1426: }
1427: }
1428: $SIG{ALRM} = 'DEFAULT';
1429: $SIG{__DIE__} = \&catchexception;
1430: &status("Finished checking children");
1431: }
1432:
1433: # --------------------------------------------------------------------- Logging
1434:
1435: sub logthis {
1436: my $message=shift;
1437: my $execdir=$perlvar{'lonDaemons'};
1438: my $fh=IO::File->new(">>$execdir/logs/lond.log");
1439: my $now=time;
1440: my $local=localtime($now);
1441: $lastlog=$local.': '.$message;
1442: print $fh "$local ($$): $message\n";
1443: }
1444:
1445: # ------------------------- Conditional log if $DEBUG true.
1446: sub Debug {
1447: my $message = shift;
1448: if($DEBUG) {
1449: &logthis($message);
1450: }
1451: }
1452:
1453: #
1454: # Sub to do replies to client.. this gives a hook for some
1455: # debug tracing too:
1456: # Parameters:
1457: # fd - File open on client.
1458: # reply - Text to send to client.
1459: # request - Original request from client.
1460: #
1461: sub Reply {
1462:
1463: my ($fd, $reply, $request) = @_;
1464:
1465: print $fd $reply;
1466: Debug("Request was $request Reply was $reply");
1467:
1468: }
1469: # ------------------------------------------------------------------ Log status
1470:
1471: sub logstatus {
1472: &status("Doing logging");
1473: my $docdir=$perlvar{'lonDocRoot'};
1474: {
1475: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1476: print $fh $$."\t".$clientname."\t".$currenthostid."\t"
1477: .$status."\t".$lastlog."\t $keymode\n";
1478: $fh->close();
1479: }
1480: &status("Finished londstatus.txt");
1481: {
1482: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1483: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1484: $fh->close();
1485: }
1486: &status("Finished logging");
1487: }
1488:
1489: sub initnewstatus {
1490: my $docdir=$perlvar{'lonDocRoot'};
1491: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
1492: my $now=time;
1493: my $local=localtime($now);
1494: print $fh "LOND status $local - parent $$\n\n";
1495: opendir(DIR,"$docdir/lon-status/londchld");
1496: while (my $filename=readdir(DIR)) {
1497: unlink("$docdir/lon-status/londchld/$filename");
1498: }
1499: closedir(DIR);
1500: }
1501:
1502: # -------------------------------------------------------------- Status setting
1503:
1504: sub status {
1505: my $what=shift;
1506: my $now=time;
1507: my $local=localtime($now);
1508: $status=$local.': '.$what;
1509: $0='lond: '.$what.' '.$local;
1510: }
1511:
1512: # -------------------------------------------------------- Escape Special Chars
1513:
1514: sub escape {
1515: my $str=shift;
1516: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1517: return $str;
1518: }
1519:
1520: # ----------------------------------------------------- Un-Escape Special Chars
1521:
1522: sub unescape {
1523: my $str=shift;
1524: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1525: return $str;
1526: }
1527:
1528: # ----------------------------------------------------------- Send USR1 to lonc
1529:
1530: sub reconlonc {
1531: my $peerfile=shift;
1532: &logthis("Trying to reconnect for $peerfile");
1533: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
1534: if (my $fh=IO::File->new("$loncfile")) {
1535: my $loncpid=<$fh>;
1536: chomp($loncpid);
1537: if (kill 0 => $loncpid) {
1538: &logthis("lonc at pid $loncpid responding, sending USR1");
1539: kill USR1 => $loncpid;
1540: } else {
1541: &logthis(
1542: "<font color='red'>CRITICAL: "
1543: ."lonc at pid $loncpid not responding, giving up</font>");
1544: }
1545: } else {
1546: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1547: }
1548: }
1549:
1550: # -------------------------------------------------- Non-critical communication
1551:
1552: sub subreply {
1553: my ($cmd,$server)=@_;
1554: my $peerfile="$perlvar{'lonSockDir'}/$server";
1555: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1556: Type => SOCK_STREAM,
1557: Timeout => 10)
1558: or return "con_lost";
1559: print $sclient "$cmd\n";
1560: my $answer=<$sclient>;
1561: chomp($answer);
1562: if (!$answer) { $answer="con_lost"; }
1563: return $answer;
1564: }
1565:
1566: sub reply {
1567: my ($cmd,$server)=@_;
1568: my $answer;
1569: if ($server ne $currenthostid) {
1570: $answer=subreply($cmd,$server);
1571: if ($answer eq 'con_lost') {
1572: $answer=subreply("ping",$server);
1573: if ($answer ne $server) {
1574: &logthis("sub reply: answer != server answer is $answer, server is $server");
1575: &reconlonc("$perlvar{'lonSockDir'}/$server");
1576: }
1577: $answer=subreply($cmd,$server);
1578: }
1579: } else {
1580: $answer='self_reply';
1581: }
1582: return $answer;
1583: }
1584:
1585: # -------------------------------------------------------------- Talk to lonsql
1586:
1587: sub sqlreply {
1588: my ($cmd)=@_;
1589: my $answer=subsqlreply($cmd);
1590: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
1591: return $answer;
1592: }
1593:
1594: sub subsqlreply {
1595: my ($cmd)=@_;
1596: my $unixsock="mysqlsock";
1597: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
1598: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1599: Type => SOCK_STREAM,
1600: Timeout => 10)
1601: or return "con_lost";
1602: print $sclient "$cmd\n";
1603: my $answer=<$sclient>;
1604: chomp($answer);
1605: if (!$answer) { $answer="con_lost"; }
1606: return $answer;
1607: }
1608:
1609: # -------------------------------------------- Return path to profile directory
1610:
1611: sub propath {
1612: my ($udom,$uname)=@_;
1613: $udom=~s/\W//g;
1614: $uname=~s/\W//g;
1615: my $subdir=$uname.'__';
1616: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1617: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
1618: return $proname;
1619: }
1620:
1621: # --------------------------------------- Is this the home server of an author?
1622:
1623: sub ishome {
1624: my $author=shift;
1625: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1626: my ($udom,$uname)=split(/\//,$author);
1627: my $proname=propath($udom,$uname);
1628: if (-e $proname) {
1629: return 'owner';
1630: } else {
1631: return 'not_owner';
1632: }
1633: }
1634:
1635: # ======================================================= Continue main program
1636: # ---------------------------------------------------- Fork once and dissociate
1637:
1638: my $fpid=fork;
1639: exit if $fpid;
1640: die "Couldn't fork: $!" unless defined ($fpid);
1641:
1642: POSIX::setsid() or die "Can't start new session: $!";
1643:
1644: # ------------------------------------------------------- Write our PID on disk
1645:
1646: my $execdir=$perlvar{'lonDaemons'};
1647: open (PIDSAVE,">$execdir/logs/lond.pid");
1648: print PIDSAVE "$$\n";
1649: close(PIDSAVE);
1650: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1651: &status('Starting');
1652:
1653:
1654:
1655: # ----------------------------------------------------- Install signal handlers
1656:
1657:
1658: $SIG{CHLD} = \&REAPER;
1659: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1660: $SIG{HUP} = \&HUPSMAN;
1661: $SIG{USR1} = \&checkchildren;
1662: $SIG{USR2} = \&UpdateHosts;
1663:
1664: # Read the host hashes:
1665:
1666: ReadHostTable;
1667:
1668: # --------------------------------------------------------------
1669: # Accept connections. When a connection comes in, it is validated
1670: # and if good, a child process is created to process transactions
1671: # along the connection.
1672:
1673: while (1) {
1674: &status('Starting accept');
1675: $client = $server->accept() or next;
1676: &status('Accepted '.$client.' off to spawn');
1677: make_new_child($client);
1678: &status('Finished spawning');
1679: }
1680:
1681: sub make_new_child {
1682: my $pid;
1683: # my $cipher; # Now global
1684: my $sigset;
1685:
1686: $client = shift;
1687: &status('Starting new child '.$client);
1688: &logthis('<font color="green"> Attempting to start child ('.$client.
1689: ")</font>");
1690: # block signal for fork
1691: $sigset = POSIX::SigSet->new(SIGINT);
1692: sigprocmask(SIG_BLOCK, $sigset)
1693: or die "Can't block SIGINT for fork: $!\n";
1694:
1695: die "fork: $!" unless defined ($pid = fork);
1696:
1697: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
1698: # connection liveness.
1699:
1700: #
1701: # Figure out who we're talking to so we can record the peer in
1702: # the pid hash.
1703: #
1704: my $caller = getpeername($client);
1705: my ($port,$iaddr);
1706: if (defined($caller) && length($caller) > 0) {
1707: ($port,$iaddr)=unpack_sockaddr_in($caller);
1708: } else {
1709: &logthis("Unable to determine who caller was, getpeername returned nothing");
1710: }
1711: if (defined($iaddr)) {
1712: $clientip = inet_ntoa($iaddr);
1713: Debug("Connected with $clientip");
1714: $clientdns = gethostbyaddr($iaddr, AF_INET);
1715: Debug("Connected with $clientdns by name");
1716: } else {
1717: &logthis("Unable to determine clientip");
1718: $clientip='Unavailable';
1719: }
1720:
1721: if ($pid) {
1722: # Parent records the child's birth and returns.
1723: sigprocmask(SIG_UNBLOCK, $sigset)
1724: or die "Can't unblock SIGINT for fork: $!\n";
1725: $children{$pid} = $clientip;
1726: &status('Started child '.$pid);
1727: return;
1728: } else {
1729: # Child can *not* return from this subroutine.
1730: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1731: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
1732: #don't get intercepted
1733: $SIG{USR1}= \&logstatus;
1734: $SIG{ALRM}= \&timeout;
1735: $lastlog='Forked ';
1736: $status='Forked';
1737:
1738: # unblock signals
1739: sigprocmask(SIG_UNBLOCK, $sigset)
1740: or die "Can't unblock SIGINT for fork: $!\n";
1741:
1742: # my $tmpsnum=0; # Now global
1743: #---------------------------------------------------- kerberos 5 initialization
1744: &Authen::Krb5::init_context();
1745: &Authen::Krb5::init_ets();
1746:
1747: &status('Accepted connection');
1748: # =============================================================================
1749: # do something with the connection
1750: # -----------------------------------------------------------------------------
1751: # see if we know client and 'check' for spoof IP by ineffective challenge
1752:
1753: ReadManagerTable; # May also be a manager!!
1754:
1755: my $clientrec=($hostid{$clientip} ne undef);
1756: my $ismanager=($managers{$clientip} ne undef);
1757: $clientname = "[unknonwn]";
1758: if($clientrec) { # Establish client type.
1759: $ConnectionType = "client";
1760: $clientname = $hostid{$clientip};
1761: if($ismanager) {
1762: $ConnectionType = "both";
1763: }
1764: } else {
1765: $ConnectionType = "manager";
1766: $clientname = $managers{$clientip};
1767: }
1768: my $clientok;
1769:
1770: if ($clientrec || $ismanager) {
1771: &status("Waiting for init from $clientip $clientname");
1772: &logthis('<font color="yellow">INFO: Connection, '.
1773: $clientip.
1774: " ($clientname) connection type = $ConnectionType </font>" );
1775: &status("Connecting $clientip ($clientname))");
1776: my $remotereq=<$client>;
1777: chomp($remotereq);
1778: Debug("Got init: $remotereq");
1779: my $inikeyword = split(/:/, $remotereq);
1780: if ($remotereq =~ /^init/) {
1781: &sethost("sethost:$perlvar{'lonHostID'}");
1782: #
1783: # If the remote is attempting a local init... give that a try:
1784: #
1785: my ($i, $inittype) = split(/:/, $remotereq);
1786:
1787: # If the connection type is ssl, but I didn't get my
1788: # certificate files yet, then I'll drop back to
1789: # insecure (if allowed).
1790:
1791: if($inittype eq "ssl") {
1792: my ($ca, $cert) = lonssl::CertificateFile;
1793: my $kfile = lonssl::KeyFile;
1794: if((!$ca) ||
1795: (!$cert) ||
1796: (!$kfile)) {
1797: $inittype = ""; # This forces insecure attempt.
1798: &logthis("<font color=\"blue\"> Certificates not "
1799: ."installed -- trying insecure auth</font>");
1800: }
1801: else { # SSL certificates are in place so
1802: } # Leave the inittype alone.
1803: }
1804:
1805: if($inittype eq "local") {
1806: my $key = LocalConnection($client, $remotereq);
1807: if($key) {
1808: Debug("Got local key $key");
1809: $clientok = 1;
1810: my $cipherkey = pack("H32", $key);
1811: $cipher = new IDEA($cipherkey);
1812: print $client "ok:local\n";
1813: &logthis('<font color="green"'
1814: . "Successful local authentication </font>");
1815: $keymode = "local"
1816: } else {
1817: Debug("Failed to get local key");
1818: $clientok = 0;
1819: shutdown($client, 3);
1820: close $client;
1821: }
1822: } elsif ($inittype eq "ssl") {
1823: my $key = SSLConnection($client);
1824: if ($key) {
1825: $clientok = 1;
1826: my $cipherkey = pack("H32", $key);
1827: $cipher = new IDEA($cipherkey);
1828: &logthis('<font color="green">'
1829: ."Successfull ssl authentication with $clientname </font>");
1830: $keymode = "ssl";
1831:
1832: } else {
1833: $clientok = 0;
1834: close $client;
1835: }
1836:
1837: } else {
1838: my $ok = InsecureConnection($client);
1839: if($ok) {
1840: $clientok = 1;
1841: &logthis('<font color="green">'
1842: ."Successful insecure authentication with $clientname </font>");
1843: print $client "ok\n";
1844: $keymode = "insecure";
1845: } else {
1846: &logthis('<font color="yellow">'
1847: ."Attempted insecure connection disallowed </font>");
1848: close $client;
1849: $clientok = 0;
1850:
1851: }
1852: }
1853: } else {
1854: &logthis(
1855: "<font color='blue'>WARNING: "
1856: ."$clientip failed to initialize: >$remotereq< </font>");
1857: &status('No init '.$clientip);
1858: }
1859:
1860: } else {
1861: &logthis(
1862: "<font color='blue'>WARNING: Unknown client $clientip</font>");
1863: &status('Hung up on '.$clientip);
1864: }
1865:
1866: if ($clientok) {
1867: # ---------------- New known client connecting, could mean machine online again
1868:
1869: foreach my $id (keys(%hostip)) {
1870: if ($hostip{$id} ne $clientip ||
1871: $hostip{$currenthostid} eq $clientip) {
1872: # no need to try to do recon's to myself
1873: next;
1874: }
1875: &reconlonc("$perlvar{'lonSockDir'}/$id");
1876: }
1877: &logthis("<font color='green'>Established connection: $clientname</font>");
1878: &status('Will listen to '.$clientname);
1879: # ------------------------------------------------------------ Process requests
1880: while (my $userinput=<$client>) {
1881: chomp($userinput);
1882: Debug("Request = $userinput\n");
1883: &status('Processing '.$clientname.': '.$userinput);
1884: my $wasenc=0;
1885: alarm(120);
1886: # ------------------------------------------------------------ See if encrypted
1887: if ($userinput =~ /^enc/) {
1888: if ($cipher) {
1889: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
1890: $userinput='';
1891: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
1892: $userinput.=
1893: $cipher->decrypt(
1894: pack("H16",substr($encinput,$encidx,16))
1895: );
1896: }
1897: $userinput=substr($userinput,0,$cmdlength);
1898: $wasenc=1;
1899: }
1900: }
1901:
1902: # ------------------------------------------------------------- Normal commands
1903: # ------------------------------------------------------------------------ ping
1904: if ($userinput =~ /^ping/) { # client only
1905: if(isClient) {
1906: print $client "$currenthostid\n";
1907: } else {
1908: Reply($client, "refused\n", $userinput);
1909: }
1910: # ------------------------------------------------------------------------ pong
1911: }elsif ($userinput =~ /^pong/) { # client only
1912: if(isClient) {
1913: my $reply=&reply("ping",$clientname);
1914: print $client "$currenthostid:$reply\n";
1915: } else {
1916: Reply($client, "refused\n", $userinput);
1917: }
1918: # ------------------------------------------------------------------------ ekey
1919: } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
1920: my $buildkey=time.$$.int(rand 100000);
1921: $buildkey=~tr/1-6/A-F/;
1922: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1923: my $key=$currenthostid.$clientname;
1924: $key=~tr/a-z/A-Z/;
1925: $key=~tr/G-P/0-9/;
1926: $key=~tr/Q-Z/0-9/;
1927: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1928: $key=substr($key,0,32);
1929: my $cipherkey=pack("H32",$key);
1930: $cipher=new IDEA $cipherkey;
1931: print $client "$buildkey\n";
1932: # ------------------------------------------------------------------------ load
1933: } elsif ($userinput =~ /^load/) { # client only
1934: if (isClient) {
1935: my $loadavg;
1936: {
1937: my $loadfile=IO::File->new('/proc/loadavg');
1938: $loadavg=<$loadfile>;
1939: }
1940: $loadavg =~ s/\s.*//g;
1941: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1942: print $client "$loadpercent\n";
1943: } else {
1944: Reply($client, "refused\n", $userinput);
1945:
1946: }
1947: # -------------------------------------------------------------------- userload
1948: } elsif ($userinput =~ /^userload/) { # client only
1949: if(isClient) {
1950: my $userloadpercent=&userload();
1951: print $client "$userloadpercent\n";
1952: } else {
1953: Reply($client, "refused\n", $userinput);
1954:
1955: }
1956: #
1957: # Transactions requiring encryption:
1958: #
1959: # ----------------------------------------------------------------- currentauth
1960: } elsif ($userinput =~ /^currentauth/) {
1961: if (($wasenc==1) && isClient) { # Encoded & client only.
1962: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1963: my $result = GetAuthType($udom, $uname);
1964: if($result eq "nouser") {
1965: print $client "unknown_user\n";
1966: }
1967: else {
1968: print $client "$result\n"
1969: }
1970: } else {
1971: Reply($client, "refused\n", $userinput);
1972:
1973: }
1974: #--------------------------------------------------------------------- pushfile
1975: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1976: if(($wasenc == 1) && isManager) {
1977: my $cert = GetCertificate($userinput);
1978: if(ValidManager($cert)) {
1979: my $reply = PushFile($userinput);
1980: print $client "$reply\n";
1981: } else {
1982: print $client "refused\n";
1983: }
1984: } else {
1985: Reply($client, "refused\n", $userinput);
1986:
1987: }
1988: #--------------------------------------------------------------------- reinit
1989: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1990: if (($wasenc == 1) && isManager) {
1991: my $cert = GetCertificate($userinput);
1992: if(ValidManager($cert)) {
1993: chomp($userinput);
1994: my $reply = ReinitProcess($userinput);
1995: print $client "$reply\n";
1996: } else {
1997: print $client "refused\n";
1998: }
1999: } else {
2000: Reply($client, "refused\n", $userinput);
2001: }
2002: #------------------------------------------------------------------------- edit
2003: } elsif ($userinput =~ /^edit/) { # encoded and manager:
2004: if(($wasenc ==1) && (isManager)) {
2005: my $cert = GetCertificate($userinput);
2006: if(ValidManager($cert)) {
2007: my($command, $filetype, $script) = split(/:/, $userinput);
2008: if (($filetype eq "hosts") || ($filetype eq "domain")) {
2009: if($script ne "") {
2010: Reply($client, EditFile($userinput));
2011: } else {
2012: Reply($client,"refused\n",$userinput);
2013: }
2014: } else {
2015: Reply($client,"refused\n",$userinput);
2016: }
2017: } else {
2018: Reply($client,"refused\n",$userinput);
2019: }
2020: } else {
2021: Reply($client,"refused\n",$userinput);
2022: }
2023: # ------------------------------------------------------------------------ auth
2024: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
2025: if (($wasenc==1) && isClient) {
2026: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
2027: chomp($upass);
2028: $upass=unescape($upass);
2029: my $proname=propath($udom,$uname);
2030: my $passfilename="$proname/passwd";
2031: if (-e $passfilename) {
2032: my $pf = IO::File->new($passfilename);
2033: my $realpasswd=<$pf>;
2034: chomp($realpasswd);
2035: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2036: my $pwdcorrect=0;
2037: if ($howpwd eq 'internal') {
2038: &Debug("Internal auth");
2039: $pwdcorrect=
2040: (crypt($upass,$contentpwd) eq $contentpwd);
2041: } elsif ($howpwd eq 'unix') {
2042: &Debug("Unix auth");
2043: if((getpwnam($uname))[1] eq "") { #no such user!
2044: $pwdcorrect = 0;
2045: } else {
2046: $contentpwd=(getpwnam($uname))[1];
2047: my $pwauth_path="/usr/local/sbin/pwauth";
2048: unless ($contentpwd eq 'x') {
2049: $pwdcorrect=
2050: (crypt($upass,$contentpwd) eq
2051: $contentpwd);
2052: }
2053:
2054: elsif (-e $pwauth_path) {
2055: open PWAUTH, "|$pwauth_path" or
2056: die "Cannot invoke authentication";
2057: print PWAUTH "$uname\n$upass\n";
2058: close PWAUTH;
2059: $pwdcorrect=!$?;
2060: }
2061: }
2062: } elsif ($howpwd eq 'krb4') {
2063: my $null=pack("C",0);
2064: unless ($upass=~/$null/) {
2065: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
2066: ($uname,"",$contentpwd,'krbtgt',
2067: $contentpwd,1,$upass);
2068: if (!$krb4_error) {
2069: $pwdcorrect = 1;
2070: } else {
2071: $pwdcorrect=0;
2072: # log error if it is not a bad password
2073: if ($krb4_error != 62) {
2074: &logthis('krb4:'.$uname.','.
2075: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
2076: }
2077: }
2078: }
2079: } elsif ($howpwd eq 'krb5') {
2080: my $null=pack("C",0);
2081: unless ($upass=~/$null/) {
2082: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
2083: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
2084: my $krbserver=&Authen::Krb5::parse_name($krbservice);
2085: my $credentials=&Authen::Krb5::cc_default();
2086: $credentials->initialize($krbclient);
2087: my $krbreturn =
2088: &Authen::Krb5::get_in_tkt_with_password(
2089: $krbclient,$krbserver,$upass,$credentials);
2090: # unless ($krbreturn) {
2091: # &logthis("Krb5 Error: ".
2092: # &Authen::Krb5::error());
2093: # }
2094: $pwdcorrect = ($krbreturn == 1);
2095: } else { $pwdcorrect=0; }
2096: } elsif ($howpwd eq 'localauth') {
2097: $pwdcorrect=&localauth::localauth($uname,$upass,
2098: $contentpwd);
2099: }
2100: if ($pwdcorrect) {
2101: print $client "authorized\n";
2102: } else {
2103: print $client "non_authorized\n";
2104: }
2105: } else {
2106: print $client "unknown_user\n";
2107: }
2108: } else {
2109: Reply($client, "refused\n", $userinput);
2110:
2111: }
2112: # ---------------------------------------------------------------------- passwd
2113: } elsif ($userinput =~ /^passwd/) { # encoded and client
2114: if (($wasenc==1) && isClient) {
2115: my
2116: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
2117: chomp($npass);
2118: $upass=&unescape($upass);
2119: $npass=&unescape($npass);
2120: &Debug("Trying to change password for $uname");
2121: my $proname=propath($udom,$uname);
2122: my $passfilename="$proname/passwd";
2123: if (-e $passfilename) {
2124: my $realpasswd;
2125: { my $pf = IO::File->new($passfilename);
2126: $realpasswd=<$pf>; }
2127: chomp($realpasswd);
2128: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2129: if ($howpwd eq 'internal') {
2130: &Debug("internal auth");
2131: if (crypt($upass,$contentpwd) eq $contentpwd) {
2132: my $salt=time;
2133: $salt=substr($salt,6,2);
2134: my $ncpass=crypt($npass,$salt);
2135: {
2136: my $pf;
2137: if ($pf = IO::File->new(">$passfilename")) {
2138: print $pf "internal:$ncpass\n";
2139: &logthis("Result of password change for $uname: pwchange_success");
2140: print $client "ok\n";
2141: } else {
2142: &logthis("Unable to open $uname passwd to change password");
2143: print $client "non_authorized\n";
2144: }
2145: }
2146:
2147: } else {
2148: print $client "non_authorized\n";
2149: }
2150: } elsif ($howpwd eq 'unix') {
2151: # Unix means we have to access /etc/password
2152: # one way or another.
2153: # First: Make sure the current password is
2154: # correct
2155: &Debug("auth is unix");
2156: $contentpwd=(getpwnam($uname))[1];
2157: my $pwdcorrect = "0";
2158: my $pwauth_path="/usr/local/sbin/pwauth";
2159: unless ($contentpwd eq 'x') {
2160: $pwdcorrect=
2161: (crypt($upass,$contentpwd) eq $contentpwd);
2162: } elsif (-e $pwauth_path) {
2163: open PWAUTH, "|$pwauth_path" or
2164: die "Cannot invoke authentication";
2165: print PWAUTH "$uname\n$upass\n";
2166: close PWAUTH;
2167: &Debug("exited pwauth with $? ($uname,$upass) ");
2168: $pwdcorrect=($? == 0);
2169: }
2170: if ($pwdcorrect) {
2171: my $execdir=$perlvar{'lonDaemons'};
2172: &Debug("Opening lcpasswd pipeline");
2173: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
2174: print $pf "$uname\n$npass\n$npass\n";
2175: close $pf;
2176: my $err = $?;
2177: my $result = ($err>0 ? 'pwchange_failure'
2178: : 'ok');
2179: &logthis("Result of password change for $uname: ".
2180: &lcpasswdstrerror($?));
2181: print $client "$result\n";
2182: } else {
2183: print $client "non_authorized\n";
2184: }
2185: } else {
2186: print $client "auth_mode_error\n";
2187: }
2188: } else {
2189: print $client "unknown_user\n";
2190: }
2191: } else {
2192: Reply($client, "refused\n", $userinput);
2193:
2194: }
2195: # -------------------------------------------------------------------- makeuser
2196: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
2197: &Debug("Make user received");
2198: my $oldumask=umask(0077);
2199: if (($wasenc==1) && isClient) {
2200: my
2201: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
2202: &Debug("cmd =".$cmd." $udom =".$udom.
2203: " uname=".$uname);
2204: chomp($npass);
2205: $npass=&unescape($npass);
2206: my $proname=propath($udom,$uname);
2207: my $passfilename="$proname/passwd";
2208: &Debug("Password file created will be:".
2209: $passfilename);
2210: if (-e $passfilename) {
2211: print $client "already_exists\n";
2212: } elsif ($udom ne $currentdomainid) {
2213: print $client "not_right_domain\n";
2214: } else {
2215: my @fpparts=split(/\//,$proname);
2216: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
2217: my $fperror='';
2218: for (my $i=3;$i<=$#fpparts;$i++) {
2219: $fpnow.='/'.$fpparts[$i];
2220: unless (-e $fpnow) {
2221: unless (mkdir($fpnow,0777)) {
2222: $fperror="error: ".($!+0)
2223: ." mkdir failed while attempting "
2224: ."makeuser";
2225: }
2226: }
2227: }
2228: unless ($fperror) {
2229: my $result=&make_passwd_file($uname, $umode,$npass,
2230: $passfilename);
2231: print $client $result;
2232: } else {
2233: print $client "$fperror\n";
2234: }
2235: }
2236: } else {
2237: Reply($client, "refused\n", $userinput);
2238:
2239: }
2240: umask($oldumask);
2241: # -------------------------------------------------------------- changeuserauth
2242: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
2243: &Debug("Changing authorization");
2244: if (($wasenc==1) && isClient) {
2245: my
2246: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
2247: chomp($npass);
2248: &Debug("cmd = ".$cmd." domain= ".$udom.
2249: "uname =".$uname." umode= ".$umode);
2250: $npass=&unescape($npass);
2251: my $proname=&propath($udom,$uname);
2252: my $passfilename="$proname/passwd";
2253: if ($udom ne $currentdomainid) {
2254: print $client "not_right_domain\n";
2255: } else {
2256: my $result=&make_passwd_file($uname, $umode,$npass,
2257: $passfilename);
2258: print $client $result;
2259: }
2260: } else {
2261: Reply($client, "refused\n", $userinput);
2262:
2263: }
2264: # ------------------------------------------------------------------------ home
2265: } elsif ($userinput =~ /^home/) { # client clear or encoded
2266: if(isClient) {
2267: my ($cmd,$udom,$uname)=split(/:/,$userinput);
2268: chomp($uname);
2269: my $proname=propath($udom,$uname);
2270: if (-e $proname) {
2271: print $client "found\n";
2272: } else {
2273: print $client "not_found\n";
2274: }
2275: } else {
2276: Reply($client, "refused\n", $userinput);
2277:
2278: }
2279: # ---------------------------------------------------------------------- update
2280: } elsif ($userinput =~ /^update/) { # client clear or encoded.
2281: if(isClient) {
2282: my ($cmd,$fname)=split(/:/,$userinput);
2283: my $ownership=ishome($fname);
2284: if ($ownership eq 'not_owner') {
2285: if (-e $fname) {
2286: my ($dev,$ino,$mode,$nlink,
2287: $uid,$gid,$rdev,$size,
2288: $atime,$mtime,$ctime,
2289: $blksize,$blocks)=stat($fname);
2290: my $now=time;
2291: my $since=$now-$atime;
2292: if ($since>$perlvar{'lonExpire'}) {
2293: my $reply=
2294: &reply("unsub:$fname","$clientname");
2295: unlink("$fname");
2296: } else {
2297: my $transname="$fname.in.transfer";
2298: my $remoteurl=
2299: &reply("sub:$fname","$clientname");
2300: my $response;
2301: {
2302: my $ua=new LWP::UserAgent;
2303: my $request=new HTTP::Request('GET',"$remoteurl");
2304: $response=$ua->request($request,$transname);
2305: }
2306: if ($response->is_error()) {
2307: unlink($transname);
2308: my $message=$response->status_line;
2309: &logthis(
2310: "LWP GET: $message for $fname ($remoteurl)");
2311: } else {
2312: if ($remoteurl!~/\.meta$/) {
2313: my $ua=new LWP::UserAgent;
2314: my $mrequest=
2315: new HTTP::Request('GET',$remoteurl.'.meta');
2316: my $mresponse=
2317: $ua->request($mrequest,$fname.'.meta');
2318: if ($mresponse->is_error()) {
2319: unlink($fname.'.meta');
2320: }
2321: }
2322: rename($transname,$fname);
2323: }
2324: }
2325: print $client "ok\n";
2326: } else {
2327: print $client "not_found\n";
2328: }
2329: } else {
2330: print $client "rejected\n";
2331: }
2332: } else {
2333: Reply($client, "refused\n", $userinput);
2334:
2335: }
2336: # -------------------------------------- fetch a user file from a remote server
2337: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
2338: if(isClient) {
2339: my ($cmd,$fname)=split(/:/,$userinput);
2340: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2341: my $udir=propath($udom,$uname).'/userfiles';
2342: unless (-e $udir) { mkdir($udir,0770); }
2343: if (-e $udir) {
2344: $ufile=~s/^[\.\~]+//;
2345: my $path = $udir;
2346: if ($ufile =~m|(.+)/([^/]+)$|) {
2347: my @parts=split('/',$1);
2348: foreach my $part (@parts) {
2349: $path .= '/'.$part;
2350: if ((-e $path)!=1) {
2351: mkdir($path,0770);
2352: }
2353: }
2354: }
2355: my $destname=$udir.'/'.$ufile;
2356: my $transname=$udir.'/'.$ufile.'.in.transit';
2357: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2358: my $response;
2359: {
2360: my $ua=new LWP::UserAgent;
2361: my $request=new HTTP::Request('GET',"$remoteurl");
2362: $response=$ua->request($request,$transname);
2363: }
2364: if ($response->is_error()) {
2365: unlink($transname);
2366: my $message=$response->status_line;
2367: &logthis("LWP GET: $message for $fname ($remoteurl)");
2368: print $client "failed\n";
2369: } else {
2370: if (!rename($transname,$destname)) {
2371: &logthis("Unable to move $transname to $destname");
2372: unlink($transname);
2373: print $client "failed\n";
2374: } else {
2375: print $client "ok\n";
2376: }
2377: }
2378: } else {
2379: print $client "not_home\n";
2380: }
2381: } else {
2382: Reply($client, "refused\n", $userinput);
2383: }
2384: # --------------------------------------------------------- remove a user file
2385: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
2386: if(isClient) {
2387: my ($cmd,$fname)=split(/:/,$userinput);
2388: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2389: &logthis("$udom - $uname - $ufile");
2390: if ($ufile =~m|/\.\./|) {
2391: # any files paths with /../ in them refuse
2392: # to deal with
2393: print $client "refused\n";
2394: } else {
2395: my $udir=propath($udom,$uname);
2396: if (-e $udir) {
2397: my $file=$udir.'/userfiles/'.$ufile;
2398: if (-e $file) {
2399: unlink($file);
2400: if (-e $file) {
2401: print $client "failed\n";
2402: } else {
2403: print $client "ok\n";
2404: }
2405: } else {
2406: print $client "not_found\n";
2407: }
2408: } else {
2409: print $client "not_home\n";
2410: }
2411: }
2412: } else {
2413: Reply($client, "refused\n", $userinput);
2414: }
2415: # ------------------------------------------ authenticate access to a user file
2416: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
2417: if(isClient) {
2418: my ($cmd,$fname,$session)=split(/:/,$userinput);
2419: chomp($session);
2420: my $reply='non_auth';
2421: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2422: $session.'.id')) {
2423: while (my $line=<ENVIN>) {
2424: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
2425: }
2426: close(ENVIN);
2427: print $client $reply."\n";
2428: } else {
2429: print $client "invalid_token\n";
2430: }
2431: } else {
2432: Reply($client, "refused\n", $userinput);
2433:
2434: }
2435: # ----------------------------------------------------------------- unsubscribe
2436: } elsif ($userinput =~ /^unsub/) {
2437: if(isClient) {
2438: my ($cmd,$fname)=split(/:/,$userinput);
2439: if (-e $fname) {
2440: print $client &unsub($fname,$clientip);
2441: } else {
2442: print $client "not_found\n";
2443: }
2444: } else {
2445: Reply($client, "refused\n", $userinput);
2446:
2447: }
2448: # ------------------------------------------------------------------- subscribe
2449: } elsif ($userinput =~ /^sub/) {
2450: if(isClient) {
2451: print $client &subscribe($userinput,$clientip);
2452: } else {
2453: Reply($client, "refused\n", $userinput);
2454:
2455: }
2456: # ------------------------------------------------------------- current version
2457: } elsif ($userinput =~ /^currentversion/) {
2458: if(isClient) {
2459: my ($cmd,$fname)=split(/:/,$userinput);
2460: print $client ¤tversion($fname)."\n";
2461: } else {
2462: Reply($client, "refused\n", $userinput);
2463:
2464: }
2465: # ------------------------------------------------------------------------- log
2466: } elsif ($userinput =~ /^log/) {
2467: if(isClient) {
2468: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
2469: chomp($what);
2470: my $proname=propath($udom,$uname);
2471: my $now=time;
2472: {
2473: my $hfh;
2474: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2475: print $hfh "$now:$clientname:$what\n";
2476: print $client "ok\n";
2477: } else {
2478: print $client "error: ".($!+0)
2479: ." IO::File->new Failed "
2480: ."while attempting log\n";
2481: }
2482: }
2483: } else {
2484: Reply($client, "refused\n", $userinput);
2485:
2486: }
2487: # ------------------------------------------------------------------------- put
2488: } elsif ($userinput =~ /^put/) {
2489: if(isClient) {
2490: my ($cmd,$udom,$uname,$namespace,$what)
2491: =split(/:/,$userinput,5);
2492: $namespace=~s/\//\_/g;
2493: $namespace=~s/\W//g;
2494: if ($namespace ne 'roles') {
2495: chomp($what);
2496: my $proname=propath($udom,$uname);
2497: my $now=time;
2498: unless ($namespace=~/^nohist\_/) {
2499: my $hfh;
2500: if (
2501: $hfh=IO::File->new(">>$proname/$namespace.hist")
2502: ) { print $hfh "P:$now:$what\n"; }
2503: }
2504: my @pairs=split(/\&/,$what);
2505: my %hash;
2506: if (tie(%hash,'GDBM_File',
2507: "$proname/$namespace.db",
2508: &GDBM_WRCREAT(),0640)) {
2509: foreach my $pair (@pairs) {
2510: my ($key,$value)=split(/=/,$pair);
2511: $hash{$key}=$value;
2512: }
2513: if (untie(%hash)) {
2514: print $client "ok\n";
2515: } else {
2516: print $client "error: ".($!+0)
2517: ." untie(GDBM) failed ".
2518: "while attempting put\n";
2519: }
2520: } else {
2521: print $client "error: ".($!)
2522: ." tie(GDBM) Failed ".
2523: "while attempting put\n";
2524: }
2525: } else {
2526: print $client "refused\n";
2527: }
2528: } else {
2529: Reply($client, "refused\n", $userinput);
2530:
2531: }
2532: # ------------------------------------------------------------------- inc
2533: } elsif ($userinput =~ /^inc:/) {
2534: if(isClient) {
2535: my ($cmd,$udom,$uname,$namespace,$what)
2536: =split(/:/,$userinput);
2537: $namespace=~s/\//\_/g;
2538: $namespace=~s/\W//g;
2539: if ($namespace ne 'roles') {
2540: chomp($what);
2541: my $proname=propath($udom,$uname);
2542: my $now=time;
2543: unless ($namespace=~/^nohist\_/) {
2544: my $hfh;
2545: if (
2546: $hfh=IO::File->new(">>$proname/$namespace.hist")
2547: ) { print $hfh "P:$now:$what\n"; }
2548: }
2549: my @pairs=split(/\&/,$what);
2550: my %hash;
2551: if (tie(%hash,'GDBM_File',
2552: "$proname/$namespace.db",
2553: &GDBM_WRCREAT(),0640)) {
2554: foreach my $pair (@pairs) {
2555: my ($key,$value)=split(/=/,$pair);
2556: # We could check that we have a number...
2557: if (! defined($value) || $value eq '') {
2558: $value = 1;
2559: }
2560: $hash{$key}+=$value;
2561: }
2562: if (untie(%hash)) {
2563: print $client "ok\n";
2564: } else {
2565: print $client "error: ".($!+0)
2566: ." untie(GDBM) failed ".
2567: "while attempting inc\n";
2568: }
2569: } else {
2570: print $client "error: ".($!)
2571: ." tie(GDBM) Failed ".
2572: "while attempting inc\n";
2573: }
2574: } else {
2575: print $client "refused\n";
2576: }
2577: } else {
2578: Reply($client, "refused\n", $userinput);
2579:
2580: }
2581: # -------------------------------------------------------------------- rolesput
2582: } elsif ($userinput =~ /^rolesput/) {
2583: if(isClient) {
2584: &Debug("rolesput");
2585: if ($wasenc==1) {
2586: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2587: =split(/:/,$userinput);
2588: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2589: "user = ".$exeuser." udom=".$udom.
2590: "what = ".$what);
2591: my $namespace='roles';
2592: chomp($what);
2593: my $proname=propath($udom,$uname);
2594: my $now=time;
2595: {
2596: my $hfh;
2597: if (
2598: $hfh=IO::File->new(">>$proname/$namespace.hist")
2599: ) {
2600: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2601: }
2602: }
2603: my @pairs=split(/\&/,$what);
2604: my %hash;
2605: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2606: foreach my $pair (@pairs) {
2607: my ($key,$value)=split(/=/,$pair);
2608: &ManagePermissions($key, $udom, $uname,
2609: &GetAuthType( $udom,
2610: $uname));
2611: $hash{$key}=$value;
2612: }
2613: if (untie(%hash)) {
2614: print $client "ok\n";
2615: } else {
2616: print $client "error: ".($!+0)
2617: ." untie(GDBM) Failed ".
2618: "while attempting rolesput\n";
2619: }
2620: } else {
2621: print $client "error: ".($!+0)
2622: ." tie(GDBM) Failed ".
2623: "while attempting rolesput\n";
2624: }
2625: } else {
2626: print $client "refused\n";
2627: }
2628: } else {
2629: Reply($client, "refused\n", $userinput);
2630:
2631: }
2632: # -------------------------------------------------------------------- rolesdel
2633: } elsif ($userinput =~ /^rolesdel/) {
2634: if(isClient) {
2635: &Debug("rolesdel");
2636: if ($wasenc==1) {
2637: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2638: =split(/:/,$userinput);
2639: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2640: "user = ".$exeuser." udom=".$udom.
2641: "what = ".$what);
2642: my $namespace='roles';
2643: chomp($what);
2644: my $proname=propath($udom,$uname);
2645: my $now=time;
2646: {
2647: my $hfh;
2648: if (
2649: $hfh=IO::File->new(">>$proname/$namespace.hist")
2650: ) {
2651: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2652: }
2653: }
2654: my @rolekeys=split(/\&/,$what);
2655: my %hash;
2656: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2657: foreach my $key (@rolekeys) {
2658: delete $hash{$key};
2659: }
2660: if (untie(%hash)) {
2661: print $client "ok\n";
2662: } else {
2663: print $client "error: ".($!+0)
2664: ." untie(GDBM) Failed ".
2665: "while attempting rolesdel\n";
2666: }
2667: } else {
2668: print $client "error: ".($!+0)
2669: ." tie(GDBM) Failed ".
2670: "while attempting rolesdel\n";
2671: }
2672: } else {
2673: print $client "refused\n";
2674: }
2675: } else {
2676: Reply($client, "refused\n", $userinput);
2677:
2678: }
2679: # ------------------------------------------------------------------------- get
2680: } elsif ($userinput =~ /^get/) {
2681: if(isClient) {
2682: my ($cmd,$udom,$uname,$namespace,$what)
2683: =split(/:/,$userinput);
2684: $namespace=~s/\//\_/g;
2685: $namespace=~s/\W//g;
2686: chomp($what);
2687: my @queries=split(/\&/,$what);
2688: my $proname=propath($udom,$uname);
2689: my $qresult='';
2690: my %hash;
2691: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2692: for (my $i=0;$i<=$#queries;$i++) {
2693: $qresult.="$hash{$queries[$i]}&";
2694: }
2695: if (untie(%hash)) {
2696: $qresult=~s/\&$//;
2697: print $client "$qresult\n";
2698: } else {
2699: print $client "error: ".($!+0)
2700: ." untie(GDBM) Failed ".
2701: "while attempting get\n";
2702: }
2703: } else {
2704: if ($!+0 == 2) {
2705: print $client "error:No such file or ".
2706: "GDBM reported bad block error\n";
2707: } else {
2708: print $client "error: ".($!+0)
2709: ." tie(GDBM) Failed ".
2710: "while attempting get\n";
2711: }
2712: }
2713: } else {
2714: Reply($client, "refused\n", $userinput);
2715:
2716: }
2717: # ------------------------------------------------------------------------ eget
2718: } elsif ($userinput =~ /^eget/) {
2719: if (isClient) {
2720: my ($cmd,$udom,$uname,$namespace,$what)
2721: =split(/:/,$userinput);
2722: $namespace=~s/\//\_/g;
2723: $namespace=~s/\W//g;
2724: chomp($what);
2725: my @queries=split(/\&/,$what);
2726: my $proname=propath($udom,$uname);
2727: my $qresult='';
2728: my %hash;
2729: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2730: for (my $i=0;$i<=$#queries;$i++) {
2731: $qresult.="$hash{$queries[$i]}&";
2732: }
2733: if (untie(%hash)) {
2734: $qresult=~s/\&$//;
2735: if ($cipher) {
2736: my $cmdlength=length($qresult);
2737: $qresult.=" ";
2738: my $encqresult='';
2739: for
2740: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2741: $encqresult.=
2742: unpack("H16",
2743: $cipher->encrypt(substr($qresult,$encidx,8)));
2744: }
2745: print $client "enc:$cmdlength:$encqresult\n";
2746: } else {
2747: print $client "error:no_key\n";
2748: }
2749: } else {
2750: print $client "error: ".($!+0)
2751: ." untie(GDBM) Failed ".
2752: "while attempting eget\n";
2753: }
2754: } else {
2755: print $client "error: ".($!+0)
2756: ." tie(GDBM) Failed ".
2757: "while attempting eget\n";
2758: }
2759: } else {
2760: Reply($client, "refused\n", $userinput);
2761:
2762: }
2763: # ------------------------------------------------------------------------- del
2764: } elsif ($userinput =~ /^del/) {
2765: if(isClient) {
2766: my ($cmd,$udom,$uname,$namespace,$what)
2767: =split(/:/,$userinput);
2768: $namespace=~s/\//\_/g;
2769: $namespace=~s/\W//g;
2770: chomp($what);
2771: my $proname=propath($udom,$uname);
2772: my $now=time;
2773: unless ($namespace=~/^nohist\_/) {
2774: my $hfh;
2775: if (
2776: $hfh=IO::File->new(">>$proname/$namespace.hist")
2777: ) { print $hfh "D:$now:$what\n"; }
2778: }
2779: my @keys=split(/\&/,$what);
2780: my %hash;
2781: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2782: foreach my $key (@keys) {
2783: delete($hash{$key});
2784: }
2785: if (untie(%hash)) {
2786: print $client "ok\n";
2787: } else {
2788: print $client "error: ".($!+0)
2789: ." untie(GDBM) Failed ".
2790: "while attempting del\n";
2791: }
2792: } else {
2793: print $client "error: ".($!+0)
2794: ." tie(GDBM) Failed ".
2795: "while attempting del\n";
2796: }
2797: } else {
2798: Reply($client, "refused\n", $userinput);
2799:
2800: }
2801: # ------------------------------------------------------------------------ keys
2802: } elsif ($userinput =~ /^keys/) {
2803: if(isClient) {
2804: my ($cmd,$udom,$uname,$namespace)
2805: =split(/:/,$userinput);
2806: $namespace=~s/\//\_/g;
2807: $namespace=~s/\W//g;
2808: my $proname=propath($udom,$uname);
2809: my $qresult='';
2810: my %hash;
2811: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2812: foreach my $key (keys %hash) {
2813: $qresult.="$key&";
2814: }
2815: if (untie(%hash)) {
2816: $qresult=~s/\&$//;
2817: print $client "$qresult\n";
2818: } else {
2819: print $client "error: ".($!+0)
2820: ." untie(GDBM) Failed ".
2821: "while attempting keys\n";
2822: }
2823: } else {
2824: print $client "error: ".($!+0)
2825: ." tie(GDBM) Failed ".
2826: "while attempting keys\n";
2827: }
2828: } else {
2829: Reply($client, "refused\n", $userinput);
2830:
2831: }
2832: # ----------------------------------------------------------------- dumpcurrent
2833: } elsif ($userinput =~ /^currentdump/) {
2834: if (isClient) {
2835: my ($cmd,$udom,$uname,$namespace)
2836: =split(/:/,$userinput);
2837: $namespace=~s/\//\_/g;
2838: $namespace=~s/\W//g;
2839: my $qresult='';
2840: my $proname=propath($udom,$uname);
2841: my %hash;
2842: if (tie(%hash,'GDBM_File',
2843: "$proname/$namespace.db",
2844: &GDBM_READER(),0640)) {
2845: # Structure of %data:
2846: # $data{$symb}->{$parameter}=$value;
2847: # $data{$symb}->{'v.'.$parameter}=$version;
2848: # since $parameter will be unescaped, we do not
2849: # have to worry about silly parameter names...
2850: my %data = ();
2851: while (my ($key,$value) = each(%hash)) {
2852: my ($v,$symb,$param) = split(/:/,$key);
2853: next if ($v eq 'version' || $symb eq 'keys');
2854: next if (exists($data{$symb}) &&
2855: exists($data{$symb}->{$param}) &&
2856: $data{$symb}->{'v.'.$param} > $v);
2857: $data{$symb}->{$param}=$value;
2858: $data{$symb}->{'v.'.$param}=$v;
2859: }
2860: if (untie(%hash)) {
2861: while (my ($symb,$param_hash) = each(%data)) {
2862: while(my ($param,$value) = each (%$param_hash)){
2863: next if ($param =~ /^v\./);
2864: $qresult.=$symb.':'.$param.'='.$value.'&';
2865: }
2866: }
2867: chop($qresult);
2868: print $client "$qresult\n";
2869: } else {
2870: print $client "error: ".($!+0)
2871: ." untie(GDBM) Failed ".
2872: "while attempting currentdump\n";
2873: }
2874: } else {
2875: print $client "error: ".($!+0)
2876: ." tie(GDBM) Failed ".
2877: "while attempting currentdump\n";
2878: }
2879: } else {
2880: Reply($client, "refused\n", $userinput);
2881: }
2882: # ------------------------------------------------------------------------ dump
2883: } elsif ($userinput =~ /^dump/) {
2884: if(isClient) {
2885: my ($cmd,$udom,$uname,$namespace,$regexp)
2886: =split(/:/,$userinput);
2887: $namespace=~s/\//\_/g;
2888: $namespace=~s/\W//g;
2889: if (defined($regexp)) {
2890: $regexp=&unescape($regexp);
2891: } else {
2892: $regexp='.';
2893: }
2894: my $qresult='';
2895: my $proname=propath($udom,$uname);
2896: my %hash;
2897: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2898: while (my ($key,$value) = each(%hash)) {
2899: if ($regexp eq '.') {
2900: $qresult.=$key.'='.$value.'&';
2901: } else {
2902: my $unescapeKey = &unescape($key);
2903: if (eval('$unescapeKey=~/$regexp/')) {
2904: $qresult.="$key=$value&";
2905: }
2906: }
2907: }
2908: if (untie(%hash)) {
2909: chop($qresult);
2910: print $client "$qresult\n";
2911: } else {
2912: print $client "error: ".($!+0)
2913: ." untie(GDBM) Failed ".
2914: "while attempting dump\n";
2915: }
2916: } else {
2917: print $client "error: ".($!+0)
2918: ." tie(GDBM) Failed ".
2919: "while attempting dump\n";
2920: }
2921: } else {
2922: Reply($client, "refused\n", $userinput);
2923:
2924: }
2925: # ----------------------------------------------------------------------- store
2926: } elsif ($userinput =~ /^store/) {
2927: if(isClient) {
2928: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2929: =split(/:/,$userinput);
2930: $namespace=~s/\//\_/g;
2931: $namespace=~s/\W//g;
2932: if ($namespace ne 'roles') {
2933: chomp($what);
2934: my $proname=propath($udom,$uname);
2935: my $now=time;
2936: unless ($namespace=~/^nohist\_/) {
2937: my $hfh;
2938: if (
2939: $hfh=IO::File->new(">>$proname/$namespace.hist")
2940: ) { print $hfh "P:$now:$rid:$what\n"; }
2941: }
2942: my @pairs=split(/\&/,$what);
2943: my %hash;
2944: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2945: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2946: my $key;
2947: $hash{"version:$rid"}++;
2948: my $version=$hash{"version:$rid"};
2949: my $allkeys='';
2950: foreach my $pair (@pairs) {
2951: my ($key,$value)=split(/=/,$pair);
2952: $allkeys.=$key.':';
2953: $hash{"$version:$rid:$key"}=$value;
2954: }
2955: $hash{"$version:$rid:timestamp"}=$now;
2956: $allkeys.='timestamp';
2957: $hash{"$version:keys:$rid"}=$allkeys;
2958: if (untie(%hash)) {
2959: print $client "ok\n";
2960: } else {
2961: print $client "error: ".($!+0)
2962: ." untie(GDBM) Failed ".
2963: "while attempting store\n";
2964: }
2965: } else {
2966: print $client "error: ".($!+0)
2967: ." tie(GDBM) Failed ".
2968: "while attempting store\n";
2969: }
2970: } else {
2971: print $client "refused\n";
2972: }
2973: } else {
2974: Reply($client, "refused\n", $userinput);
2975:
2976: }
2977: # --------------------------------------------------------------------- restore
2978: } elsif ($userinput =~ /^restore/) {
2979: if(isClient) {
2980: my ($cmd,$udom,$uname,$namespace,$rid)
2981: =split(/:/,$userinput);
2982: $namespace=~s/\//\_/g;
2983: $namespace=~s/\W//g;
2984: chomp($rid);
2985: my $proname=propath($udom,$uname);
2986: my $qresult='';
2987: my %hash;
2988: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2989: my $version=$hash{"version:$rid"};
2990: $qresult.="version=$version&";
2991: my $scope;
2992: for ($scope=1;$scope<=$version;$scope++) {
2993: my $vkeys=$hash{"$scope:keys:$rid"};
2994: my @keys=split(/:/,$vkeys);
2995: my $key;
2996: $qresult.="$scope:keys=$vkeys&";
2997: foreach $key (@keys) {
2998: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2999: }
3000: }
3001: if (untie(%hash)) {
3002: $qresult=~s/\&$//;
3003: print $client "$qresult\n";
3004: } else {
3005: print $client "error: ".($!+0)
3006: ." untie(GDBM) Failed ".
3007: "while attempting restore\n";
3008: }
3009: } else {
3010: print $client "error: ".($!+0)
3011: ." tie(GDBM) Failed ".
3012: "while attempting restore\n";
3013: }
3014: } else {
3015: Reply($client, "refused\n", $userinput);
3016:
3017: }
3018: # -------------------------------------------------------------------- chatsend
3019: } elsif ($userinput =~ /^chatsend/) {
3020: if(isClient) {
3021: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
3022: &chatadd($cdom,$cnum,$newpost);
3023: print $client "ok\n";
3024: } else {
3025: Reply($client, "refused\n", $userinput);
3026:
3027: }
3028: # -------------------------------------------------------------------- chatretr
3029: } elsif ($userinput =~ /^chatretr/) {
3030: if(isClient) {
3031: my
3032: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
3033: my $reply='';
3034: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
3035: $reply.=&escape($_).':';
3036: }
3037: $reply=~s/\:$//;
3038: print $client $reply."\n";
3039: } else {
3040: Reply($client, "refused\n", $userinput);
3041:
3042: }
3043: # ------------------------------------------------------------------- querysend
3044: } elsif ($userinput =~ /^querysend/) {
3045: if (isClient) {
3046: my ($cmd,$query,
3047: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
3048: $query=~s/\n*$//g;
3049: print $client "".
3050: sqlreply("$clientname\&$query".
3051: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
3052: } else {
3053: Reply($client, "refused\n", $userinput);
3054:
3055: }
3056: # ------------------------------------------------------------------ queryreply
3057: } elsif ($userinput =~ /^queryreply/) {
3058: if(isClient) {
3059: my ($cmd,$id,$reply)=split(/:/,$userinput);
3060: my $store;
3061: my $execdir=$perlvar{'lonDaemons'};
3062: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3063: $reply=~s/\&/\n/g;
3064: print $store $reply;
3065: close $store;
3066: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3067: print $store2 "done\n";
3068: close $store2;
3069: print $client "ok\n";
3070: }
3071: else {
3072: print $client "error: ".($!+0)
3073: ." IO::File->new Failed ".
3074: "while attempting queryreply\n";
3075: }
3076: } else {
3077: Reply($client, "refused\n", $userinput);
3078:
3079: }
3080: # ----------------------------------------------------------------- courseidput
3081: } elsif ($userinput =~ /^courseidput/) {
3082: if(isClient) {
3083: my ($cmd,$udom,$what)=split(/:/,$userinput);
3084: chomp($what);
3085: $udom=~s/\W//g;
3086: my $proname=
3087: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
3088: my $now=time;
3089: my @pairs=split(/\&/,$what);
3090: my %hash;
3091: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
3092: foreach my $pair (@pairs) {
3093: my ($key,$descr,$inst_code)=split(/=/,$pair);
3094: $hash{$key}=$descr.':'.$inst_code.':'.$now;
3095: }
3096: if (untie(%hash)) {
3097: print $client "ok\n";
3098: } else {
3099: print $client "error: ".($!+0)
3100: ." untie(GDBM) Failed ".
3101: "while attempting courseidput\n";
3102: }
3103: } else {
3104: print $client "error: ".($!+0)
3105: ." tie(GDBM) Failed ".
3106: "while attempting courseidput\n";
3107: }
3108: } else {
3109: Reply($client, "refused\n", $userinput);
3110:
3111: }
3112: # ---------------------------------------------------------------- courseiddump
3113: } elsif ($userinput =~ /^courseiddump/) {
3114: if(isClient) {
3115: my ($cmd,$udom,$since,$description)
3116: =split(/:/,$userinput);
3117: if (defined($description)) {
3118: $description=&unescape($description);
3119: } else {
3120: $description='.';
3121: }
3122: unless (defined($since)) { $since=0; }
3123: my $qresult='';
3124: my $proname=
3125: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
3126: my %hash;
3127: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
3128: while (my ($key,$value) = each(%hash)) {
3129: my ($descr,$lasttime,$inst_code);
3130: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
3131: ($descr,$inst_code,$lasttime)=($1,$2,$3);
3132: } else {
3133: ($descr,$lasttime) = split(/\:/,$value);
3134: }
3135: if ($lasttime<$since) { next; }
3136: if ($description eq '.') {
3137: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3138: } else {
3139: my $unescapeVal = &unescape($descr);
3140: if (eval('$unescapeVal=~/\Q$description\E/i')) {
3141: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3142: }
3143: }
3144: }
3145: if (untie(%hash)) {
3146: chop($qresult);
3147: print $client "$qresult\n";
3148: } else {
3149: print $client "error: ".($!+0)
3150: ." untie(GDBM) Failed ".
3151: "while attempting courseiddump\n";
3152: }
3153: } else {
3154: print $client "error: ".($!+0)
3155: ." tie(GDBM) Failed ".
3156: "while attempting courseiddump\n";
3157: }
3158: } else {
3159: Reply($client, "refused\n", $userinput);
3160:
3161: }
3162: # ----------------------------------------------------------------------- idput
3163: } elsif ($userinput =~ /^idput/) {
3164: if(isClient) {
3165: my ($cmd,$udom,$what)=split(/:/,$userinput);
3166: chomp($what);
3167: $udom=~s/\W//g;
3168: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
3169: my $now=time;
3170: {
3171: my $hfh;
3172: if (
3173: $hfh=IO::File->new(">>$proname.hist")
3174: ) { print $hfh "P:$now:$what\n"; }
3175: }
3176: my @pairs=split(/\&/,$what);
3177: my %hash;
3178: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
3179: foreach my $pair (@pairs) {
3180: my ($key,$value)=split(/=/,$pair);
3181: $hash{$key}=$value;
3182: }
3183: if (untie(%hash)) {
3184: print $client "ok\n";
3185: } else {
3186: print $client "error: ".($!+0)
3187: ." untie(GDBM) Failed ".
3188: "while attempting idput\n";
3189: }
3190: } else {
3191: print $client "error: ".($!+0)
3192: ." tie(GDBM) Failed ".
3193: "while attempting idput\n";
3194: }
3195: } else {
3196: Reply($client, "refused\n", $userinput);
3197:
3198: }
3199: # ----------------------------------------------------------------------- idget
3200: } elsif ($userinput =~ /^idget/) {
3201: if(isClient) {
3202: my ($cmd,$udom,$what)=split(/:/,$userinput);
3203: chomp($what);
3204: $udom=~s/\W//g;
3205: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
3206: my @queries=split(/\&/,$what);
3207: my $qresult='';
3208: my %hash;
3209: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
3210: for (my $i=0;$i<=$#queries;$i++) {
3211: $qresult.="$hash{$queries[$i]}&";
3212: }
3213: if (untie(%hash)) {
3214: $qresult=~s/\&$//;
3215: print $client "$qresult\n";
3216: } else {
3217: print $client "error: ".($!+0)
3218: ." untie(GDBM) Failed ".
3219: "while attempting idget\n";
3220: }
3221: } else {
3222: print $client "error: ".($!+0)
3223: ." tie(GDBM) Failed ".
3224: "while attempting idget\n";
3225: }
3226: } else {
3227: Reply($client, "refused\n", $userinput);
3228:
3229: }
3230: # ---------------------------------------------------------------------- tmpput
3231: } elsif ($userinput =~ /^tmpput/) {
3232: if(isClient) {
3233: my ($cmd,$what)=split(/:/,$userinput);
3234: my $store;
3235: $tmpsnum++;
3236: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3237: $id=~s/\W/\_/g;
3238: $what=~s/\n//g;
3239: my $execdir=$perlvar{'lonDaemons'};
3240: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3241: print $store $what;
3242: close $store;
3243: print $client "$id\n";
3244: }
3245: else {
3246: print $client "error: ".($!+0)
3247: ."IO::File->new Failed ".
3248: "while attempting tmpput\n";
3249: }
3250: } else {
3251: Reply($client, "refused\n", $userinput);
3252:
3253: }
3254:
3255: # ---------------------------------------------------------------------- tmpget
3256: } elsif ($userinput =~ /^tmpget/) {
3257: if(isClient) {
3258: my ($cmd,$id)=split(/:/,$userinput);
3259: chomp($id);
3260: $id=~s/\W/\_/g;
3261: my $store;
3262: my $execdir=$perlvar{'lonDaemons'};
3263: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3264: my $reply=<$store>;
3265: print $client "$reply\n";
3266: close $store;
3267: }
3268: else {
3269: print $client "error: ".($!+0)
3270: ."IO::File->new Failed ".
3271: "while attempting tmpget\n";
3272: }
3273: } else {
3274: Reply($client, "refused\n", $userinput);
3275:
3276: }
3277: # ---------------------------------------------------------------------- tmpdel
3278: } elsif ($userinput =~ /^tmpdel/) {
3279: if(isClient) {
3280: my ($cmd,$id)=split(/:/,$userinput);
3281: chomp($id);
3282: $id=~s/\W/\_/g;
3283: my $execdir=$perlvar{'lonDaemons'};
3284: if (unlink("$execdir/tmp/$id.tmp")) {
3285: print $client "ok\n";
3286: } else {
3287: print $client "error: ".($!+0)
3288: ."Unlink tmp Failed ".
3289: "while attempting tmpdel\n";
3290: }
3291: } else {
3292: Reply($client, "refused\n", $userinput);
3293:
3294: }
3295: # ----------------------------------------- portfolio directory list (portls)
3296: } elsif ($userinput =~ /^portls/) {
3297: if(isClient) {
3298: my ($cmd,$uname,$udom)=split(/:/,$userinput);
3299: my $udir=propath($udom,$uname).'/userfiles/portfolio';
3300: my $dirLine='';
3301: my $dirContents='';
3302: if (opendir(LSDIR,$udir.'/')){
3303: while ($dirLine = readdir(LSDIR)){
3304: $dirContents = $dirContents.$dirLine.'<br />';
3305: }
3306: } else {
3307: $dirContents = "No directory found\n";
3308: }
3309: print $client $dirContents."\n";
3310: } else {
3311: Reply($client, "refused\n", $userinput);
3312: }
3313: # -------------------------------------------------------------------------- ls
3314: } elsif ($userinput =~ /^ls/) {
3315: if(isClient) {
3316: my $obs;
3317: my $rights;
3318: my ($cmd,$ulsdir)=split(/:/,$userinput);
3319: my $ulsout='';
3320: my $ulsfn;
3321: if (-e $ulsdir) {
3322: if(-d $ulsdir) {
3323: if (opendir(LSDIR,$ulsdir)) {
3324: while ($ulsfn=readdir(LSDIR)) {
3325: undef $obs, $rights;
3326: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
3327: #We do some obsolete checking here
3328: if(-e $ulsdir.'/'.$ulsfn.".meta") {
3329: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
3330: my @obsolete=<FILE>;
3331: foreach my $obsolete (@obsolete) {
3332: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
3333: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
3334: }
3335: }
3336: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
3337: if($obs eq '1') { $ulsout.="&1"; }
3338: else { $ulsout.="&0"; }
3339: if($rights eq '1') { $ulsout.="&1:"; }
3340: else { $ulsout.="&0:"; }
3341: }
3342: closedir(LSDIR);
3343: }
3344: } else {
3345: my @ulsstats=stat($ulsdir);
3346: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
3347: }
3348: } else {
3349: $ulsout='no_such_dir';
3350: }
3351: if ($ulsout eq '') { $ulsout='empty'; }
3352: print $client "$ulsout\n";
3353: } else {
3354: Reply($client, "refused\n", $userinput);
3355:
3356: }
3357: # ----------------------------------------------------------------- setannounce
3358: } elsif ($userinput =~ /^setannounce/) {
3359: if (isClient) {
3360: my ($cmd,$announcement)=split(/:/,$userinput);
3361: chomp($announcement);
3362: $announcement=&unescape($announcement);
3363: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3364: '/announcement.txt')) {
3365: print $store $announcement;
3366: close $store;
3367: print $client "ok\n";
3368: } else {
3369: print $client "error: ".($!+0)."\n";
3370: }
3371: } else {
3372: Reply($client, "refused\n", $userinput);
3373:
3374: }
3375: # ------------------------------------------------------------------ Hanging up
3376: } elsif (($userinput =~ /^exit/) ||
3377: ($userinput =~ /^init/)) { # no restrictions.
3378: &logthis(
3379: "Client $clientip ($clientname) hanging up: $userinput");
3380: print $client "bye\n";
3381: $client->shutdown(2); # shutdown the socket forcibly.
3382: $client->close();
3383: last;
3384:
3385: # ---------------------------------- set current host/domain
3386: } elsif ($userinput =~ /^sethost:/) {
3387: if (isClient) {
3388: print $client &sethost($userinput)."\n";
3389: } else {
3390: print $client "refused\n";
3391: }
3392: #---------------------------------- request file (?) version.
3393: } elsif ($userinput =~/^version:/) {
3394: if (isClient) {
3395: print $client &version($userinput)."\n";
3396: } else {
3397: print $client "refused\n";
3398: }
3399: #------------------------------- is auto-enrollment enabled?
3400: } elsif ($userinput =~/^autorun:/) {
3401: if (isClient) {
3402: my ($cmd,$cdom) = split(/:/,$userinput);
3403: my $outcome = &localenroll::run($cdom);
3404: print $client "$outcome\n";
3405: } else {
3406: print $client "0\n";
3407: }
3408: #------------------------------- get official sections (for auto-enrollment).
3409: } elsif ($userinput =~/^autogetsections:/) {
3410: if (isClient) {
3411: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
3412: my @secs = &localenroll::get_sections($coursecode,$cdom);
3413: my $seclist = &escape(join(':',@secs));
3414: print $client "$seclist\n";
3415: } else {
3416: print $client "refused\n";
3417: }
3418: #----------------------- validate owner of new course section (for auto-enrollment).
3419: } elsif ($userinput =~/^autonewcourse:/) {
3420: if (isClient) {
3421: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
3422: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3423: print $client "$outcome\n";
3424: } else {
3425: print $client "refused\n";
3426: }
3427: #-------------- validate course section in schedule of classes (for auto-enrollment).
3428: } elsif ($userinput =~/^autovalidatecourse:/) {
3429: if (isClient) {
3430: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
3431: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3432: print $client "$outcome\n";
3433: } else {
3434: print $client "refused\n";
3435: }
3436: #--------------------------- create password for new user (for auto-enrollment).
3437: } elsif ($userinput =~/^autocreatepassword:/) {
3438: if (isClient) {
3439: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
3440: my ($create_passwd,$authchk);
3441: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
3442: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
3443: } else {
3444: print $client "refused\n";
3445: }
3446: #--------------------------- read and remove temporary files (for auto-enrollment).
3447: } elsif ($userinput =~/^autoretrieve:/) {
3448: if (isClient) {
3449: my ($cmd,$filename) = split(/:/,$userinput);
3450: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3451: if ( (-e $source) && ($filename ne '') ) {
3452: my $reply = '';
3453: if (open(my $fh,$source)) {
3454: while (<$fh>) {
3455: chomp($_);
3456: $_ =~ s/^\s+//g;
3457: $_ =~ s/\s+$//g;
3458: $reply .= $_;
3459: }
3460: close($fh);
3461: print $client &escape($reply)."\n";
3462: # unlink($source);
3463: } else {
3464: print $client "error\n";
3465: }
3466: } else {
3467: print $client "error\n";
3468: }
3469: } else {
3470: print $client "refused\n";
3471: }
3472: #--------------------- read and retrieve institutional code format (for support form).
3473: } elsif ($userinput =~/^autoinstcodeformat:/) {
3474: if (isClient) {
3475: my $reply;
3476: my($cmd,$cdom,$course) = split(/:/,$userinput);
3477: my @pairs = split/\&/,$course;
3478: my %instcodes = ();
3479: my %codes = ();
3480: my @codetitles = ();
3481: my %cat_titles = ();
3482: my %cat_order = ();
3483: foreach (@pairs) {
3484: my ($key,$value) = split/=/,$_;
3485: $instcodes{&unescape($key)} = &unescape($value);
3486: }
3487: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
3488: if ($formatreply eq 'ok') {
3489: my $codes_str = &hash2str(%codes);
3490: my $codetitles_str = &array2str(@codetitles);
3491: my $cat_titles_str = &hash2str(%cat_titles);
3492: my $cat_order_str = &hash2str(%cat_order);
3493: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
3494: }
3495: } else {
3496: print $client "refused\n";
3497: }
3498: # ------------------------------------------------------------- unknown command
3499:
3500: } else {
3501: # unknown command
3502: print $client "unknown_cmd\n";
3503: }
3504: # -------------------------------------------------------------------- complete
3505: alarm(0);
3506: &status('Listening to '.$clientname." ($keymode)");
3507: }
3508: # --------------------------------------------- client unknown or fishy, refuse
3509: } else {
3510: print $client "refused\n";
3511: $client->close();
3512: &logthis("<font color='blue'>WARNING: "
3513: ."Rejected client $clientip, closing connection</font>");
3514: }
3515: }
3516:
3517: # =============================================================================
3518:
3519: &logthis("<font color='red'>CRITICAL: "
3520: ."Disconnect from $clientip ($clientname)</font>");
3521:
3522:
3523: # this exit is VERY important, otherwise the child will become
3524: # a producer of more and more children, forking yourself into
3525: # process death.
3526: exit;
3527:
3528: }
3529:
3530:
3531: #
3532: # Checks to see if the input roleput request was to set
3533: # an author role. If so, invokes the lchtmldir script to set
3534: # up a correct public_html
3535: # Parameters:
3536: # request - The request sent to the rolesput subchunk.
3537: # We're looking for /domain/_au
3538: # domain - The domain in which the user is having roles doctored.
3539: # user - Name of the user for which the role is being put.
3540: # authtype - The authentication type associated with the user.
3541: #
3542: sub ManagePermissions
3543: {
3544:
3545: my ($request, $domain, $user, $authtype) = @_;
3546:
3547: # See if the request is of the form /$domain/_au
3548: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3549: my $execdir = $perlvar{'lonDaemons'};
3550: my $userhome= "/home/$user" ;
3551: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
3552: system("$execdir/lchtmldir $userhome $user $authtype");
3553: }
3554: }
3555: #
3556: # GetAuthType - Determines the authorization type of a user in a domain.
3557:
3558: # Returns the authorization type or nouser if there is no such user.
3559: #
3560: sub GetAuthType
3561: {
3562:
3563: my ($domain, $user) = @_;
3564:
3565: Debug("GetAuthType( $domain, $user ) \n");
3566: my $proname = &propath($domain, $user);
3567: my $passwdfile = "$proname/passwd";
3568: if( -e $passwdfile ) {
3569: my $pf = IO::File->new($passwdfile);
3570: my $realpassword = <$pf>;
3571: chomp($realpassword);
3572: Debug("Password info = $realpassword\n");
3573: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3574: Debug("Authtype = $authtype, content = $contentpwd\n");
3575: my $availinfo = '';
3576: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3577: $availinfo = $contentpwd;
3578: }
3579:
3580: return "$authtype:$availinfo";
3581: }
3582: else {
3583: Debug("Returning nouser");
3584: return "nouser";
3585: }
3586: }
3587:
3588: sub addline {
3589: my ($fname,$hostid,$ip,$newline)=@_;
3590: my $contents;
3591: my $found=0;
3592: my $expr='^'.$hostid.':'.$ip.':';
3593: $expr =~ s/\./\\\./g;
3594: my $sh;
3595: if ($sh=IO::File->new("$fname.subscription")) {
3596: while (my $subline=<$sh>) {
3597: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3598: }
3599: $sh->close();
3600: }
3601: $sh=IO::File->new(">$fname.subscription");
3602: if ($contents) { print $sh $contents; }
3603: if ($newline) { print $sh $newline; }
3604: $sh->close();
3605: return $found;
3606: }
3607:
3608: sub getchat {
3609: my ($cdom,$cname,$udom,$uname)=@_;
3610: my %hash;
3611: my $proname=&propath($cdom,$cname);
3612: my @entries=();
3613: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3614: &GDBM_READER(),0640)) {
3615: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3616: untie %hash;
3617: }
3618: my @participants=();
3619: my $cutoff=time-60;
3620: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
3621: &GDBM_WRCREAT(),0640)) {
3622: $hash{$uname.':'.$udom}=time;
3623: foreach (sort keys %hash) {
3624: if ($hash{$_}>$cutoff) {
3625: $participants[$#participants+1]='active_participant:'.$_;
3626: }
3627: }
3628: untie %hash;
3629: }
3630: return (@participants,@entries);
3631: }
3632:
3633: sub chatadd {
3634: my ($cdom,$cname,$newchat)=@_;
3635: my %hash;
3636: my $proname=&propath($cdom,$cname);
3637: my @entries=();
3638: my $time=time;
3639: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3640: &GDBM_WRCREAT(),0640)) {
3641: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3642: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
3643: my ($thentime,$idnum)=split(/\_/,$lastid);
3644: my $newid=$time.'_000000';
3645: if ($thentime==$time) {
3646: $idnum=~s/^0+//;
3647: $idnum++;
3648: $idnum=substr('000000'.$idnum,-6,6);
3649: $newid=$time.'_'.$idnum;
3650: }
3651: $hash{$newid}=$newchat;
3652: my $expired=$time-3600;
3653: foreach (keys %hash) {
3654: my ($thistime)=($_=~/(\d+)\_/);
3655: if ($thistime<$expired) {
3656: delete $hash{$_};
3657: }
3658: }
3659: untie %hash;
3660: }
3661: {
3662: my $hfh;
3663: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3664: print $hfh "$time:".&unescape($newchat)."\n";
3665: }
3666: }
3667: }
3668:
3669: sub unsub {
3670: my ($fname,$clientip)=@_;
3671: my $result;
3672: my $unsubs = 0; # Number of successful unsubscribes:
3673:
3674:
3675: # An old way subscriptions were handled was to have a
3676: # subscription marker file:
3677:
3678: Debug("Attempting unlink of $fname.$clientname");
3679: if (unlink("$fname.$clientname")) {
3680: $unsubs++; # Successful unsub via marker file.
3681: }
3682:
3683: # The more modern way to do it is to have a subscription list
3684: # file:
3685:
3686: if (-e "$fname.subscription") {
3687: my $found=&addline($fname,$clientname,$clientip,'');
3688: if ($found) {
3689: $unsubs++;
3690: }
3691: }
3692:
3693: # If either or both of these mechanisms succeeded in unsubscribing a
3694: # resource we can return ok:
3695:
3696: if($unsubs) {
3697: $result = "ok\n";
3698: } else {
3699: $result = "not_subscribed\n";
3700: }
3701:
3702: return $result;
3703: }
3704:
3705: sub currentversion {
3706: my $fname=shift;
3707: my $version=-1;
3708: my $ulsdir='';
3709: if ($fname=~/^(.+)\/[^\/]+$/) {
3710: $ulsdir=$1;
3711: }
3712: my ($fnamere1,$fnamere2);
3713: # remove version if already specified
3714: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
3715: # get the bits that go before and after the version number
3716: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
3717: $fnamere1=$1;
3718: $fnamere2='.'.$2;
3719: }
3720: if (-e $fname) { $version=1; }
3721: if (-e $ulsdir) {
3722: if(-d $ulsdir) {
3723: if (opendir(LSDIR,$ulsdir)) {
3724: my $ulsfn;
3725: while ($ulsfn=readdir(LSDIR)) {
3726: # see if this is a regular file (ignore links produced earlier)
3727: my $thisfile=$ulsdir.'/'.$ulsfn;
3728: unless (-l $thisfile) {
3729: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
3730: if ($1>$version) { $version=$1; }
3731: }
3732: }
3733: }
3734: closedir(LSDIR);
3735: $version++;
3736: }
3737: }
3738: }
3739: return $version;
3740: }
3741:
3742: sub thisversion {
3743: my $fname=shift;
3744: my $version=-1;
3745: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
3746: $version=$1;
3747: }
3748: return $version;
3749: }
3750:
3751: sub subscribe {
3752: my ($userinput,$clientip)=@_;
3753: my $result;
3754: my ($cmd,$fname)=split(/:/,$userinput);
3755: my $ownership=&ishome($fname);
3756: if ($ownership eq 'owner') {
3757: # explitly asking for the current version?
3758: unless (-e $fname) {
3759: my $currentversion=¤tversion($fname);
3760: if (&thisversion($fname)==$currentversion) {
3761: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
3762: my $root=$1;
3763: my $extension=$2;
3764: symlink($root.'.'.$extension,
3765: $root.'.'.$currentversion.'.'.$extension);
3766: unless ($extension=~/\.meta$/) {
3767: symlink($root.'.'.$extension.'.meta',
3768: $root.'.'.$currentversion.'.'.$extension.'.meta');
3769: }
3770: }
3771: }
3772: }
3773: if (-e $fname) {
3774: if (-d $fname) {
3775: $result="directory\n";
3776: } else {
3777: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
3778: my $now=time;
3779: my $found=&addline($fname,$clientname,$clientip,
3780: "$clientname:$clientip:$now\n");
3781: if ($found) { $result="$fname\n"; }
3782: # if they were subscribed to only meta data, delete that
3783: # subscription, when you subscribe to a file you also get
3784: # the metadata
3785: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
3786: $fname=~s/\/home\/httpd\/html\/res/raw/;
3787: $fname="http://$thisserver/".$fname;
3788: $result="$fname\n";
3789: }
3790: } else {
3791: $result="not_found\n";
3792: }
3793: } else {
3794: $result="rejected\n";
3795: }
3796: return $result;
3797: }
3798:
3799: sub make_passwd_file {
3800: my ($uname, $umode,$npass,$passfilename)=@_;
3801: my $result="ok\n";
3802: if ($umode eq 'krb4' or $umode eq 'krb5') {
3803: {
3804: my $pf = IO::File->new(">$passfilename");
3805: print $pf "$umode:$npass\n";
3806: }
3807: } elsif ($umode eq 'internal') {
3808: my $salt=time;
3809: $salt=substr($salt,6,2);
3810: my $ncpass=crypt($npass,$salt);
3811: {
3812: &Debug("Creating internal auth");
3813: my $pf = IO::File->new(">$passfilename");
3814: print $pf "internal:$ncpass\n";
3815: }
3816: } elsif ($umode eq 'localauth') {
3817: {
3818: my $pf = IO::File->new(">$passfilename");
3819: print $pf "localauth:$npass\n";
3820: }
3821: } elsif ($umode eq 'unix') {
3822: {
3823: #
3824: # Don't allow the creation of privileged accounts!!! that would
3825: # be real bad!!!
3826: #
3827: my $uid = getpwnam($uname);
3828: if((defined $uid) && ($uid == 0)) {
3829: &logthis(">>>Attempted to create privilged account blocked");
3830: return "no_priv_account_error\n";
3831: }
3832:
3833: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
3834: {
3835: &Debug("Executing external: ".$execpath);
3836: &Debug("user = ".$uname.", Password =". $npass);
3837: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
3838: print $se "$uname\n";
3839: print $se "$npass\n";
3840: print $se "$npass\n";
3841: }
3842: my $useraddok = $?;
3843: if($useraddok > 0) {
3844: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
3845: }
3846: my $pf = IO::File->new(">$passfilename");
3847: print $pf "unix:\n";
3848: }
3849: } elsif ($umode eq 'none') {
3850: {
3851: my $pf = IO::File->new(">$passfilename");
3852: print $pf "none:\n";
3853: }
3854: } else {
3855: $result="auth_mode_error\n";
3856: }
3857: return $result;
3858: }
3859:
3860: sub sethost {
3861: my ($remotereq) = @_;
3862: my (undef,$hostid)=split(/:/,$remotereq);
3863: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
3864: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
3865: $currenthostid =$hostid;
3866: $currentdomainid=$hostdom{$hostid};
3867: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
3868: } else {
3869: &logthis("Requested host id $hostid not an alias of ".
3870: $perlvar{'lonHostID'}." refusing connection");
3871: return 'unable_to_set';
3872: }
3873: return 'ok';
3874: }
3875:
3876: sub version {
3877: my ($userinput)=@_;
3878: $remoteVERSION=(split(/:/,$userinput))[1];
3879: return "version:$VERSION";
3880: }
3881:
3882: #There is a copy of this in lonnet.pm
3883: sub userload {
3884: my $numusers=0;
3885: {
3886: opendir(LONIDS,$perlvar{'lonIDsDir'});
3887: my $filename;
3888: my $curtime=time;
3889: while ($filename=readdir(LONIDS)) {
3890: if ($filename eq '.' || $filename eq '..') {next;}
3891: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
3892: if ($curtime-$mtime < 1800) { $numusers++; }
3893: }
3894: closedir(LONIDS);
3895: }
3896: my $userloadpercent=0;
3897: my $maxuserload=$perlvar{'lonUserLoadLim'};
3898: if ($maxuserload) {
3899: $userloadpercent=100*$numusers/$maxuserload;
3900: }
3901: $userloadpercent=sprintf("%.2f",$userloadpercent);
3902: return $userloadpercent;
3903: }
3904:
3905: # Routines for serializing arrays and hashes (copies from lonnet)
3906:
3907: sub array2str {
3908: my (@array) = @_;
3909: my $result=&arrayref2str(\@array);
3910: $result=~s/^__ARRAY_REF__//;
3911: $result=~s/__END_ARRAY_REF__$//;
3912: return $result;
3913: }
3914:
3915: sub arrayref2str {
3916: my ($arrayref) = @_;
3917: my $result='__ARRAY_REF__';
3918: foreach my $elem (@$arrayref) {
3919: if(ref($elem) eq 'ARRAY') {
3920: $result.=&arrayref2str($elem).'&';
3921: } elsif(ref($elem) eq 'HASH') {
3922: $result.=&hashref2str($elem).'&';
3923: } elsif(ref($elem)) {
3924: #print("Got a ref of ".(ref($elem))." skipping.");
3925: } else {
3926: $result.=&escape($elem).'&';
3927: }
3928: }
3929: $result=~s/\&$//;
3930: $result .= '__END_ARRAY_REF__';
3931: return $result;
3932: }
3933:
3934: sub hash2str {
3935: my (%hash) = @_;
3936: my $result=&hashref2str(\%hash);
3937: $result=~s/^__HASH_REF__//;
3938: $result=~s/__END_HASH_REF__$//;
3939: return $result;
3940: }
3941:
3942: sub hashref2str {
3943: my ($hashref)=@_;
3944: my $result='__HASH_REF__';
3945: foreach (sort(keys(%$hashref))) {
3946: if (ref($_) eq 'ARRAY') {
3947: $result.=&arrayref2str($_).'=';
3948: } elsif (ref($_) eq 'HASH') {
3949: $result.=&hashref2str($_).'=';
3950: } elsif (ref($_)) {
3951: $result.='=';
3952: #print("Got a ref of ".(ref($_))." skipping.");
3953: } else {
3954: if ($_) {$result.=&escape($_).'=';} else { last; }
3955: }
3956:
3957: if(ref($hashref->{$_}) eq 'ARRAY') {
3958: $result.=&arrayref2str($hashref->{$_}).'&';
3959: } elsif(ref($hashref->{$_}) eq 'HASH') {
3960: $result.=&hashref2str($hashref->{$_}).'&';
3961: } elsif(ref($hashref->{$_})) {
3962: $result.='&';
3963: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
3964: } else {
3965: $result.=&escape($hashref->{$_}).'&';
3966: }
3967: }
3968: $result=~s/\&$//;
3969: $result .= '__END_HASH_REF__';
3970: return $result;
3971: }
3972:
3973: # ----------------------------------- POD (plain old documentation, CPAN style)
3974:
3975: =head1 NAME
3976:
3977: lond - "LON Daemon" Server (port "LOND" 5663)
3978:
3979: =head1 SYNOPSIS
3980:
3981: Usage: B<lond>
3982:
3983: Should only be run as user=www. This is a command-line script which
3984: is invoked by B<loncron>. There is no expectation that a typical user
3985: will manually start B<lond> from the command-line. (In other words,
3986: DO NOT START B<lond> YOURSELF.)
3987:
3988: =head1 DESCRIPTION
3989:
3990: There are two characteristics associated with the running of B<lond>,
3991: PROCESS MANAGEMENT (starting, stopping, handling child processes)
3992: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
3993: subscriptions, etc). These are described in two large
3994: sections below.
3995:
3996: B<PROCESS MANAGEMENT>
3997:
3998: Preforker - server who forks first. Runs as a daemon. HUPs.
3999: Uses IDEA encryption
4000:
4001: B<lond> forks off children processes that correspond to the other servers
4002: in the network. Management of these processes can be done at the
4003: parent process level or the child process level.
4004:
4005: B<logs/lond.log> is the location of log messages.
4006:
4007: The process management is now explained in terms of linux shell commands,
4008: subroutines internal to this code, and signal assignments:
4009:
4010: =over 4
4011:
4012: =item *
4013:
4014: PID is stored in B<logs/lond.pid>
4015:
4016: This is the process id number of the parent B<lond> process.
4017:
4018: =item *
4019:
4020: SIGTERM and SIGINT
4021:
4022: Parent signal assignment:
4023: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4024:
4025: Child signal assignment:
4026: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4027: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4028: to restart a new child.)
4029:
4030: Command-line invocations:
4031: B<kill> B<-s> SIGTERM I<PID>
4032: B<kill> B<-s> SIGINT I<PID>
4033:
4034: Subroutine B<HUNTSMAN>:
4035: This is only invoked for the B<lond> parent I<PID>.
4036: This kills all the children, and then the parent.
4037: The B<lonc.pid> file is cleared.
4038:
4039: =item *
4040:
4041: SIGHUP
4042:
4043: Current bug:
4044: This signal can only be processed the first time
4045: on the parent process. Subsequent SIGHUP signals
4046: have no effect.
4047:
4048: Parent signal assignment:
4049: $SIG{HUP} = \&HUPSMAN;
4050:
4051: Child signal assignment:
4052: none (nothing happens)
4053:
4054: Command-line invocations:
4055: B<kill> B<-s> SIGHUP I<PID>
4056:
4057: Subroutine B<HUPSMAN>:
4058: This is only invoked for the B<lond> parent I<PID>,
4059: This kills all the children, and then the parent.
4060: The B<lond.pid> file is cleared.
4061:
4062: =item *
4063:
4064: SIGUSR1
4065:
4066: Parent signal assignment:
4067: $SIG{USR1} = \&USRMAN;
4068:
4069: Child signal assignment:
4070: $SIG{USR1}= \&logstatus;
4071:
4072: Command-line invocations:
4073: B<kill> B<-s> SIGUSR1 I<PID>
4074:
4075: Subroutine B<USRMAN>:
4076: When invoked for the B<lond> parent I<PID>,
4077: SIGUSR1 is sent to all the children, and the status of
4078: each connection is logged.
4079:
4080: =item *
4081:
4082: SIGUSR2
4083:
4084: Parent Signal assignment:
4085: $SIG{USR2} = \&UpdateHosts
4086:
4087: Child signal assignment:
4088: NONE
4089:
4090:
4091: =item *
4092:
4093: SIGCHLD
4094:
4095: Parent signal assignment:
4096: $SIG{CHLD} = \&REAPER;
4097:
4098: Child signal assignment:
4099: none
4100:
4101: Command-line invocations:
4102: B<kill> B<-s> SIGCHLD I<PID>
4103:
4104: Subroutine B<REAPER>:
4105: This is only invoked for the B<lond> parent I<PID>.
4106: Information pertaining to the child is removed.
4107: The socket port is cleaned up.
4108:
4109: =back
4110:
4111: B<SERVER-SIDE ACTIVITIES>
4112:
4113: Server-side information can be accepted in an encrypted or non-encrypted
4114: method.
4115:
4116: =over 4
4117:
4118: =item ping
4119:
4120: Query a client in the hosts.tab table; "Are you there?"
4121:
4122: =item pong
4123:
4124: Respond to a ping query.
4125:
4126: =item ekey
4127:
4128: Read in encrypted key, make cipher. Respond with a buildkey.
4129:
4130: =item load
4131:
4132: Respond with CPU load based on a computation upon /proc/loadavg.
4133:
4134: =item currentauth
4135:
4136: Reply with current authentication information (only over an
4137: encrypted channel).
4138:
4139: =item auth
4140:
4141: Only over an encrypted channel, reply as to whether a user's
4142: authentication information can be validated.
4143:
4144: =item passwd
4145:
4146: Allow for a password to be set.
4147:
4148: =item makeuser
4149:
4150: Make a user.
4151:
4152: =item passwd
4153:
4154: Allow for authentication mechanism and password to be changed.
4155:
4156: =item home
4157:
4158: Respond to a question "are you the home for a given user?"
4159:
4160: =item update
4161:
4162: Update contents of a subscribed resource.
4163:
4164: =item unsubscribe
4165:
4166: The server is unsubscribing from a resource.
4167:
4168: =item subscribe
4169:
4170: The server is subscribing to a resource.
4171:
4172: =item log
4173:
4174: Place in B<logs/lond.log>
4175:
4176: =item put
4177:
4178: stores hash in namespace
4179:
4180: =item rolesput
4181:
4182: put a role into a user's environment
4183:
4184: =item get
4185:
4186: returns hash with keys from array
4187: reference filled in from namespace
4188:
4189: =item eget
4190:
4191: returns hash with keys from array
4192: reference filled in from namesp (encrypts the return communication)
4193:
4194: =item rolesget
4195:
4196: get a role from a user's environment
4197:
4198: =item del
4199:
4200: deletes keys out of array from namespace
4201:
4202: =item keys
4203:
4204: returns namespace keys
4205:
4206: =item dump
4207:
4208: dumps the complete (or key matching regexp) namespace into a hash
4209:
4210: =item store
4211:
4212: stores hash permanently
4213: for this url; hashref needs to be given and should be a \%hashname; the
4214: remaining args aren't required and if they aren't passed or are '' they will
4215: be derived from the ENV
4216:
4217: =item restore
4218:
4219: returns a hash for a given url
4220:
4221: =item querysend
4222:
4223: Tells client about the lonsql process that has been launched in response
4224: to a sent query.
4225:
4226: =item queryreply
4227:
4228: Accept information from lonsql and make appropriate storage in temporary
4229: file space.
4230:
4231: =item idput
4232:
4233: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4234: for each student, defined perhaps by the institutional Registrar.)
4235:
4236: =item idget
4237:
4238: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4239: for each student, defined perhaps by the institutional Registrar.)
4240:
4241: =item tmpput
4242:
4243: Accept and store information in temporary space.
4244:
4245: =item tmpget
4246:
4247: Send along temporarily stored information.
4248:
4249: =item ls
4250:
4251: List part of a user's directory.
4252:
4253: =item pushtable
4254:
4255: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4256: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4257: must be restored manually in case of a problem with the new table file.
4258: pushtable requires that the request be encrypted and validated via
4259: ValidateManager. The form of the command is:
4260: enc:pushtable tablename <tablecontents> \n
4261: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4262: cleartext newline.
4263:
4264: =item Hanging up (exit or init)
4265:
4266: What to do when a client tells the server that they (the client)
4267: are leaving the network.
4268:
4269: =item unknown command
4270:
4271: If B<lond> is sent an unknown command (not in the list above),
4272: it replys to the client "unknown_cmd".
4273:
4274:
4275: =item UNKNOWN CLIENT
4276:
4277: If the anti-spoofing algorithm cannot verify the client,
4278: the client is rejected (with a "refused" message sent
4279: to the client, and the connection is closed.
4280:
4281: =back
4282:
4283: =head1 PREREQUISITES
4284:
4285: IO::Socket
4286: IO::File
4287: Apache::File
4288: Symbol
4289: POSIX
4290: Crypt::IDEA
4291: LWP::UserAgent()
4292: GDBM_File
4293: Authen::Krb4
4294: Authen::Krb5
4295:
4296: =head1 COREQUISITES
4297:
4298: =head1 OSNAMES
4299:
4300: linux
4301:
4302: =head1 SCRIPT CATEGORIES
4303:
4304: Server/Process
4305:
4306: =cut
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