1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.217 2004/07/28 21:33:22 foxr 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: 1.217 $'; #' stupid emacs
60: my $remoteVERSION;
61: my $currenthostid="default";
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 = 0; # Number of attempted transactions.
152: my $Failures = 0; # 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 tie_domain_hash {
959: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
960:
961: # Filter out any whitespace in the domain name:
962:
963: $domain =~ s/\W//g;
964:
965: # We have enough to go on to tie the hash:
966:
967: my $user_top_dir = $perlvar{'lonUsersDir'};
968: my $domain_dir = $user_top_dir."/$domain";
969: my $resource_file = $domain_dir."/$namespace.db";
970: my %hash;
971: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
972: if (defined($loghead)) { # Need to log the operation.
973: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
974: if($logFh) {
975: my $timestamp = time;
976: print $logFh "$loghead:$timestamp:$logtail\n";
977: }
978: $logFh->close;
979: }
980: return \%hash; # Return the tied hash.
981: } else {
982: return undef; # Tie failed.
983: }
984: }
985:
986: #
987: # Ties a user's resource file to a hash.
988: # If necessary, an appropriate history
989: # log file entry is made as well.
990: # This sub factors out common code from the subs that manipulate
991: # the various gdbm files that keep keyword value pairs.
992: # Parameters:
993: # domain - Name of the domain the user is in.
994: # user - Name of the 'current user'.
995: # namespace - Namespace representing the file to tie.
996: # how - What the tie is done to (e.g. GDBM_WRCREAT().
997: # loghead - Optional first part of log entry if there may be a
998: # history file.
999: # what - Optional tail of log entry if there may be a history
1000: # file.
1001: # Returns:
1002: # hash to which the database is tied. It's up to the caller to untie.
1003: # undef if the has could not be tied.
1004: #
1005: sub tie_user_hash {
1006: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1007:
1008: $namespace=~s/\//\_/g; # / -> _
1009: $namespace=~s/\W//g; # whitespace eliminated.
1010: my $proname = propath($domain, $user);
1011:
1012: # Tie the database.
1013:
1014: my %hash;
1015: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1016: $how, 0640)) {
1017: # If this is a namespace for which a history is kept,
1018: # make the history log entry:
1019: if (($namespace =~/^nohist\_/) && (defined($loghead))) {
1020: my $args = scalar @_;
1021: Debug(" Opening history: $namespace $args");
1022: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1023: if($hfh) {
1024: my $now = time;
1025: print $hfh "$loghead:$now:$what\n";
1026: }
1027: $hfh->close;
1028: }
1029: return \%hash;
1030: } else {
1031: return undef;
1032: }
1033:
1034: }
1035:
1036: #--------------------- Request Handlers --------------------------------------------
1037: #
1038: # By convention each request handler registers itself prior to the sub
1039: # declaration:
1040: #
1041:
1042: #++
1043: #
1044: # Handles ping requests.
1045: # Parameters:
1046: # $cmd - the actual keyword that invoked us.
1047: # $tail - the tail of the request that invoked us.
1048: # $replyfd- File descriptor connected to the client
1049: # Implicit Inputs:
1050: # $currenthostid - Global variable that carries the name of the host we are
1051: # known as.
1052: # Returns:
1053: # 1 - Ok to continue processing.
1054: # 0 - Program should exit.
1055: # Side effects:
1056: # Reply information is sent to the client.
1057:
1058: sub ping_handler {
1059: my ($cmd, $tail, $client) = @_;
1060: Debug("$cmd $tail $client .. $currenthostid:");
1061:
1062: Reply( $client,"$currenthostid\n","$cmd:$tail");
1063:
1064: return 1;
1065: }
1066: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1067:
1068: #++
1069: #
1070: # Handles pong requests. Pong replies with our current host id, and
1071: # the results of a ping sent to us via our lonc.
1072: #
1073: # Parameters:
1074: # $cmd - the actual keyword that invoked us.
1075: # $tail - the tail of the request that invoked us.
1076: # $replyfd- File descriptor connected to the client
1077: # Implicit Inputs:
1078: # $currenthostid - Global variable that carries the name of the host we are
1079: # connected to.
1080: # Returns:
1081: # 1 - Ok to continue processing.
1082: # 0 - Program should exit.
1083: # Side effects:
1084: # Reply information is sent to the client.
1085:
1086: sub pong_handler {
1087: my ($cmd, $tail, $replyfd) = @_;
1088:
1089: my $reply=&reply("ping",$clientname);
1090: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1091: return 1;
1092: }
1093: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1094:
1095: #++
1096: # Called to establish an encrypted session key with the remote client.
1097: # Note that with secure lond, in most cases this function is never
1098: # invoked. Instead, the secure session key is established either
1099: # via a local file that's locked down tight and only lives for a short
1100: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1101: # bits from /dev/urandom, rather than the predictable pattern used by
1102: # by this sub. This sub is only used in the old-style insecure
1103: # key negotiation.
1104: # Parameters:
1105: # $cmd - the actual keyword that invoked us.
1106: # $tail - the tail of the request that invoked us.
1107: # $replyfd- File descriptor connected to the client
1108: # Implicit Inputs:
1109: # $currenthostid - Global variable that carries the name of the host
1110: # known as.
1111: # $clientname - Global variable that carries the name of the hsot we're connected to.
1112: # Returns:
1113: # 1 - Ok to continue processing.
1114: # 0 - Program should exit.
1115: # Implicit Outputs:
1116: # Reply information is sent to the client.
1117: # $cipher is set with a reference to a new IDEA encryption object.
1118: #
1119: sub establish_key_handler {
1120: my ($cmd, $tail, $replyfd) = @_;
1121:
1122: my $buildkey=time.$$.int(rand 100000);
1123: $buildkey=~tr/1-6/A-F/;
1124: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1125: my $key=$currenthostid.$clientname;
1126: $key=~tr/a-z/A-Z/;
1127: $key=~tr/G-P/0-9/;
1128: $key=~tr/Q-Z/0-9/;
1129: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1130: $key=substr($key,0,32);
1131: my $cipherkey=pack("H32",$key);
1132: $cipher=new IDEA $cipherkey;
1133: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1134:
1135: return 1;
1136:
1137: }
1138: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1139:
1140:
1141: # Handler for the load command. Returns the current system load average
1142: # to the requestor.
1143: #
1144: # Parameters:
1145: # $cmd - the actual keyword that invoked us.
1146: # $tail - the tail of the request that invoked us.
1147: # $replyfd- File descriptor connected to the client
1148: # Implicit Inputs:
1149: # $currenthostid - Global variable that carries the name of the host
1150: # known as.
1151: # $clientname - Global variable that carries the name of the hsot we're connected to.
1152: # Returns:
1153: # 1 - Ok to continue processing.
1154: # 0 - Program should exit.
1155: # Side effects:
1156: # Reply information is sent to the client.
1157: sub load_handler {
1158: my ($cmd, $tail, $replyfd) = @_;
1159:
1160: # Get the load average from /proc/loadavg and calculate it as a percentage of
1161: # the allowed load limit as set by the perl global variable lonLoadLim
1162:
1163: my $loadavg;
1164: my $loadfile=IO::File->new('/proc/loadavg');
1165:
1166: $loadavg=<$loadfile>;
1167: $loadavg =~ s/\s.*//g; # Extract the first field only.
1168:
1169: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1170:
1171: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1172:
1173: return 1;
1174: }
1175: register_handler("load", \&load_handler, 0, 1, 0);
1176:
1177: #
1178: # Process the userload request. This sub returns to the client the current
1179: # user load average. It can be invoked either by clients or managers.
1180: #
1181: # Parameters:
1182: # $cmd - the actual keyword that invoked us.
1183: # $tail - the tail of the request that invoked us.
1184: # $replyfd- File descriptor connected to the client
1185: # Implicit Inputs:
1186: # $currenthostid - Global variable that carries the name of the host
1187: # known as.
1188: # $clientname - Global variable that carries the name of the hsot we're connected to.
1189: # Returns:
1190: # 1 - Ok to continue processing.
1191: # 0 - Program should exit
1192: # Implicit inputs:
1193: # whatever the userload() function requires.
1194: # Implicit outputs:
1195: # the reply is written to the client.
1196: #
1197: sub user_load_handler {
1198: my ($cmd, $tail, $replyfd) = @_;
1199:
1200: my $userloadpercent=&userload();
1201: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1202:
1203: return 1;
1204: }
1205: register_handler("userload", \&user_load_handler, 0, 1, 0);
1206:
1207:
1208: #---------------------------------------------------------------
1209: #
1210: # Getting, decoding and dispatching requests:
1211: #
1212:
1213: #
1214: # Get a Request:
1215: # Gets a Request message from the client. The transaction
1216: # is defined as a 'line' of text. We remove the new line
1217: # from the text line.
1218: #
1219: sub get_request {
1220: my $input = <$client>;
1221: chomp($input);
1222:
1223: Debug("get_request: Request = $input\n");
1224:
1225: &status('Processing '.$clientname.':'.$input);
1226:
1227: return $input;
1228: }
1229: #---------------------------------------------------------------
1230: #
1231: # Process a request. This sub should shrink as each action
1232: # gets farmed out into a separat sub that is registered
1233: # with the dispatch hash.
1234: #
1235: # Parameters:
1236: # user_input - The request received from the client (lonc).
1237: # Returns:
1238: # true to keep processing, false if caller should exit.
1239: #
1240: sub process_request {
1241: my ($userinput) = @_; # Easier for now to break style than to
1242: # fix all the userinput -> user_input.
1243: my $wasenc = 0; # True if request was encrypted.
1244: # ------------------------------------------------------------ See if encrypted
1245: if ($userinput =~ /^enc/) {
1246: $userinput = decipher($userinput);
1247: $wasenc=1;
1248: if(!$userinput) { # Cipher not defined.
1249: &Failure($client, "error: Encrypted data without negotated key");
1250: return 0;
1251: }
1252: }
1253: Debug("process_request: $userinput\n");
1254:
1255: #
1256: # The 'correct way' to add a command to lond is now to
1257: # write a sub to execute it and Add it to the command dispatch
1258: # hash via a call to register_handler.. The comments to that
1259: # sub should give you enough to go on to show how to do this
1260: # along with the examples that are building up as this code
1261: # is getting refactored. Until all branches of the
1262: # if/elseif monster below have been factored out into
1263: # separate procesor subs, if the dispatch hash is missing
1264: # the command keyword, we will fall through to the remainder
1265: # of the if/else chain below in order to keep this thing in
1266: # working order throughout the transmogrification.
1267:
1268: my ($command, $tail) = split(/:/, $userinput, 2);
1269: chomp($command);
1270: chomp($tail);
1271: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1272: $command =~ s/(\r)//; # And this too for parameterless commands.
1273: if(!$tail) {
1274: $tail =""; # defined but blank.
1275: }
1276:
1277: &Debug("Command received: $command, encoded = $wasenc");
1278:
1279: if(defined $Dispatcher{$command}) {
1280:
1281: my $dispatch_info = $Dispatcher{$command};
1282: my $handler = $$dispatch_info[0];
1283: my $need_encode = $$dispatch_info[1];
1284: my $client_types = $$dispatch_info[2];
1285: Debug("Matched dispatch hash: mustencode: $need_encode "
1286: ."ClientType $client_types");
1287:
1288: # Validate the request:
1289:
1290: my $ok = 1;
1291: my $requesterprivs = 0;
1292: if(&isClient()) {
1293: $requesterprivs |= $CLIENT_OK;
1294: }
1295: if(&isManager()) {
1296: $requesterprivs |= $MANAGER_OK;
1297: }
1298: if($need_encode && (!$wasenc)) {
1299: Debug("Must encode but wasn't: $need_encode $wasenc");
1300: $ok = 0;
1301: }
1302: if(($client_types & $requesterprivs) == 0) {
1303: Debug("Client not privileged to do this operation");
1304: $ok = 0;
1305: }
1306:
1307: if($ok) {
1308: Debug("Dispatching to handler $command $tail");
1309: my $keep_going = &$handler($command, $tail, $client);
1310: return $keep_going;
1311: } else {
1312: Debug("Refusing to dispatch because client did not match requirements");
1313: Failure($client, "refused\n", $userinput);
1314: return 1;
1315: }
1316:
1317: }
1318:
1319: #------------------- Commands not yet in spearate handlers. --------------
1320:
1321: # ----------------------------------------------------------------- currentauth
1322: if ($userinput =~ /^currentauth/) {
1323: if (($wasenc==1) && isClient) { # Encoded & client only.
1324: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1325: my $result = GetAuthType($udom, $uname);
1326: if($result eq "nouser") {
1327: print $client "unknown_user\n";
1328: }
1329: else {
1330: print $client "$result\n";
1331: }
1332: } else {
1333: Reply($client, "refused\n", $userinput);
1334:
1335: }
1336: #--------------------------------------------------------------------- pushfile
1337: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1338: if(($wasenc == 1) && isManager) {
1339: my $cert = GetCertificate($userinput);
1340: if(ValidManager($cert)) {
1341: my $reply = PushFile($userinput);
1342: print $client "$reply\n";
1343: } else {
1344: print $client "refused\n";
1345: }
1346: } else {
1347: Reply($client, "refused\n", $userinput);
1348:
1349: }
1350: #--------------------------------------------------------------------- reinit
1351: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1352: if (($wasenc == 1) && isManager) {
1353: my $cert = GetCertificate($userinput);
1354: if(ValidManager($cert)) {
1355: chomp($userinput);
1356: my $reply = ReinitProcess($userinput);
1357: print $client "$reply\n";
1358: } else {
1359: print $client "refused\n";
1360: }
1361: } else {
1362: Reply($client, "refused\n", $userinput);
1363: }
1364: #------------------------------------------------------------------------- edit
1365: } elsif ($userinput =~ /^edit/) { # encoded and manager:
1366: if(($wasenc ==1) && (isManager)) {
1367: my $cert = GetCertificate($userinput);
1368: if(ValidManager($cert)) {
1369: my($command, $filetype, $script) = split(/:/, $userinput);
1370: if (($filetype eq "hosts") || ($filetype eq "domain")) {
1371: if($script ne "") {
1372: Reply($client, EditFile($userinput));
1373: } else {
1374: Reply($client,"refused\n",$userinput);
1375: }
1376: } else {
1377: Reply($client,"refused\n",$userinput);
1378: }
1379: } else {
1380: Reply($client,"refused\n",$userinput);
1381: }
1382: } else {
1383: Reply($client,"refused\n",$userinput);
1384: }
1385: # ------------------------------------------------------------------------ auth
1386: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1387: if (($wasenc==1) && isClient) {
1388: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1389: chomp($upass);
1390: $upass=unescape($upass);
1391: my $proname=propath($udom,$uname);
1392: my $passfilename="$proname/passwd";
1393: if (-e $passfilename) {
1394: my $pf = IO::File->new($passfilename);
1395: my $realpasswd=<$pf>;
1396: chomp($realpasswd);
1397: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1398: my $pwdcorrect=0;
1399: if ($howpwd eq 'internal') {
1400: &Debug("Internal auth");
1401: $pwdcorrect=
1402: (crypt($upass,$contentpwd) eq $contentpwd);
1403: } elsif ($howpwd eq 'unix') {
1404: &Debug("Unix auth");
1405: if((getpwnam($uname))[1] eq "") { #no such user!
1406: $pwdcorrect = 0;
1407: } else {
1408: $contentpwd=(getpwnam($uname))[1];
1409: my $pwauth_path="/usr/local/sbin/pwauth";
1410: unless ($contentpwd eq 'x') {
1411: $pwdcorrect=
1412: (crypt($upass,$contentpwd) eq
1413: $contentpwd);
1414: }
1415:
1416: elsif (-e $pwauth_path) {
1417: open PWAUTH, "|$pwauth_path" or
1418: die "Cannot invoke authentication";
1419: print PWAUTH "$uname\n$upass\n";
1420: close PWAUTH;
1421: $pwdcorrect=!$?;
1422: }
1423: }
1424: } elsif ($howpwd eq 'krb4') {
1425: my $null=pack("C",0);
1426: unless ($upass=~/$null/) {
1427: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1428: ($uname,"",$contentpwd,'krbtgt',
1429: $contentpwd,1,$upass);
1430: if (!$krb4_error) {
1431: $pwdcorrect = 1;
1432: } else {
1433: $pwdcorrect=0;
1434: # log error if it is not a bad password
1435: if ($krb4_error != 62) {
1436: &logthis('krb4:'.$uname.','.
1437: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1438: }
1439: }
1440: }
1441: } elsif ($howpwd eq 'krb5') {
1442: my $null=pack("C",0);
1443: unless ($upass=~/$null/) {
1444: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1445: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1446: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1447: my $credentials=&Authen::Krb5::cc_default();
1448: $credentials->initialize($krbclient);
1449: my $krbreturn =
1450: &Authen::Krb5::get_in_tkt_with_password(
1451: $krbclient,$krbserver,$upass,$credentials);
1452: # unless ($krbreturn) {
1453: # &logthis("Krb5 Error: ".
1454: # &Authen::Krb5::error());
1455: # }
1456: $pwdcorrect = ($krbreturn == 1);
1457: } else { $pwdcorrect=0; }
1458: } elsif ($howpwd eq 'localauth') {
1459: $pwdcorrect=&localauth::localauth($uname,$upass,
1460: $contentpwd);
1461: }
1462: if ($pwdcorrect) {
1463: print $client "authorized\n";
1464: } else {
1465: print $client "non_authorized\n";
1466: }
1467: } else {
1468: print $client "unknown_user\n";
1469: }
1470: } else {
1471: Reply($client, "refused\n", $userinput);
1472:
1473: }
1474: # ---------------------------------------------------------------------- passwd
1475: } elsif ($userinput =~ /^passwd/) { # encoded and client
1476: if (($wasenc==1) && isClient) {
1477: my
1478: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1479: chomp($npass);
1480: $upass=&unescape($upass);
1481: $npass=&unescape($npass);
1482: &Debug("Trying to change password for $uname");
1483: my $proname=propath($udom,$uname);
1484: my $passfilename="$proname/passwd";
1485: if (-e $passfilename) {
1486: my $realpasswd;
1487: { my $pf = IO::File->new($passfilename);
1488: $realpasswd=<$pf>; }
1489: chomp($realpasswd);
1490: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1491: if ($howpwd eq 'internal') {
1492: &Debug("internal auth");
1493: if (crypt($upass,$contentpwd) eq $contentpwd) {
1494: my $salt=time;
1495: $salt=substr($salt,6,2);
1496: my $ncpass=crypt($npass,$salt);
1497: {
1498: my $pf;
1499: if ($pf = IO::File->new(">$passfilename")) {
1500: print $pf "internal:$ncpass\n";
1501: &logthis("Result of password change for $uname: pwchange_success");
1502: print $client "ok\n";
1503: } else {
1504: &logthis("Unable to open $uname passwd to change password");
1505: print $client "non_authorized\n";
1506: }
1507: }
1508:
1509: } else {
1510: print $client "non_authorized\n";
1511: }
1512: } elsif ($howpwd eq 'unix') {
1513: # Unix means we have to access /etc/password
1514: # one way or another.
1515: # First: Make sure the current password is
1516: # correct
1517: &Debug("auth is unix");
1518: $contentpwd=(getpwnam($uname))[1];
1519: my $pwdcorrect = "0";
1520: my $pwauth_path="/usr/local/sbin/pwauth";
1521: unless ($contentpwd eq 'x') {
1522: $pwdcorrect=
1523: (crypt($upass,$contentpwd) eq $contentpwd);
1524: } elsif (-e $pwauth_path) {
1525: open PWAUTH, "|$pwauth_path" or
1526: die "Cannot invoke authentication";
1527: print PWAUTH "$uname\n$upass\n";
1528: close PWAUTH;
1529: &Debug("exited pwauth with $? ($uname,$upass) ");
1530: $pwdcorrect=($? == 0);
1531: }
1532: if ($pwdcorrect) {
1533: my $execdir=$perlvar{'lonDaemons'};
1534: &Debug("Opening lcpasswd pipeline");
1535: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1536: print $pf "$uname\n$npass\n$npass\n";
1537: close $pf;
1538: my $err = $?;
1539: my $result = ($err>0 ? 'pwchange_failure'
1540: : 'ok');
1541: &logthis("Result of password change for $uname: ".
1542: &lcpasswdstrerror($?));
1543: print $client "$result\n";
1544: } else {
1545: print $client "non_authorized\n";
1546: }
1547: } else {
1548: print $client "auth_mode_error\n";
1549: }
1550: } else {
1551: print $client "unknown_user\n";
1552: }
1553: } else {
1554: Reply($client, "refused\n", $userinput);
1555:
1556: }
1557: # -------------------------------------------------------------------- makeuser
1558: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1559: &Debug("Make user received");
1560: my $oldumask=umask(0077);
1561: if (($wasenc==1) && isClient) {
1562: my
1563: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1564: &Debug("cmd =".$cmd." $udom =".$udom.
1565: " uname=".$uname);
1566: chomp($npass);
1567: $npass=&unescape($npass);
1568: my $proname=propath($udom,$uname);
1569: my $passfilename="$proname/passwd";
1570: &Debug("Password file created will be:".
1571: $passfilename);
1572: if (-e $passfilename) {
1573: print $client "already_exists\n";
1574: } elsif ($udom ne $currentdomainid) {
1575: print $client "not_right_domain\n";
1576: } else {
1577: my @fpparts=split(/\//,$proname);
1578: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1579: my $fperror='';
1580: for (my $i=3;$i<=$#fpparts;$i++) {
1581: $fpnow.='/'.$fpparts[$i];
1582: unless (-e $fpnow) {
1583: unless (mkdir($fpnow,0777)) {
1584: $fperror="error: ".($!+0)
1585: ." mkdir failed while attempting "
1586: ."makeuser";
1587: }
1588: }
1589: }
1590: unless ($fperror) {
1591: my $result=&make_passwd_file($uname, $umode,$npass,
1592: $passfilename);
1593: print $client $result;
1594: } else {
1595: print $client "$fperror\n";
1596: }
1597: }
1598: } else {
1599: Reply($client, "refused\n", $userinput);
1600:
1601: }
1602: umask($oldumask);
1603: # -------------------------------------------------------------- changeuserauth
1604: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1605: &Debug("Changing authorization");
1606: if (($wasenc==1) && isClient) {
1607: my
1608: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1609: chomp($npass);
1610: &Debug("cmd = ".$cmd." domain= ".$udom.
1611: "uname =".$uname." umode= ".$umode);
1612: $npass=&unescape($npass);
1613: my $proname=&propath($udom,$uname);
1614: my $passfilename="$proname/passwd";
1615: if ($udom ne $currentdomainid) {
1616: print $client "not_right_domain\n";
1617: } else {
1618: my $result=&make_passwd_file($uname, $umode,$npass,
1619: $passfilename);
1620: print $client $result;
1621: }
1622: } else {
1623: Reply($client, "refused\n", $userinput);
1624:
1625: }
1626: # ------------------------------------------------------------------------ home
1627: } elsif ($userinput =~ /^home/) { # client clear or encoded
1628: if(isClient) {
1629: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1630: chomp($uname);
1631: my $proname=propath($udom,$uname);
1632: if (-e $proname) {
1633: print $client "found\n";
1634: } else {
1635: print $client "not_found\n";
1636: }
1637: } else {
1638: Reply($client, "refused\n", $userinput);
1639:
1640: }
1641: # ---------------------------------------------------------------------- update
1642: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1643: if(isClient) {
1644: my ($cmd,$fname)=split(/:/,$userinput);
1645: my $ownership=ishome($fname);
1646: if ($ownership eq 'not_owner') {
1647: if (-e $fname) {
1648: my ($dev,$ino,$mode,$nlink,
1649: $uid,$gid,$rdev,$size,
1650: $atime,$mtime,$ctime,
1651: $blksize,$blocks)=stat($fname);
1652: my $now=time;
1653: my $since=$now-$atime;
1654: if ($since>$perlvar{'lonExpire'}) {
1655: my $reply=
1656: &reply("unsub:$fname","$clientname");
1657: unlink("$fname");
1658: } else {
1659: my $transname="$fname.in.transfer";
1660: my $remoteurl=
1661: &reply("sub:$fname","$clientname");
1662: my $response;
1663: {
1664: my $ua=new LWP::UserAgent;
1665: my $request=new HTTP::Request('GET',"$remoteurl");
1666: $response=$ua->request($request,$transname);
1667: }
1668: if ($response->is_error()) {
1669: unlink($transname);
1670: my $message=$response->status_line;
1671: &logthis(
1672: "LWP GET: $message for $fname ($remoteurl)");
1673: } else {
1674: if ($remoteurl!~/\.meta$/) {
1675: my $ua=new LWP::UserAgent;
1676: my $mrequest=
1677: new HTTP::Request('GET',$remoteurl.'.meta');
1678: my $mresponse=
1679: $ua->request($mrequest,$fname.'.meta');
1680: if ($mresponse->is_error()) {
1681: unlink($fname.'.meta');
1682: }
1683: }
1684: rename($transname,$fname);
1685: }
1686: }
1687: print $client "ok\n";
1688: } else {
1689: print $client "not_found\n";
1690: }
1691: } else {
1692: print $client "rejected\n";
1693: }
1694: } else {
1695: Reply($client, "refused\n", $userinput);
1696:
1697: }
1698: # -------------------------------------- fetch a user file from a remote server
1699: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1700: if(isClient) {
1701: my ($cmd,$fname)=split(/:/,$userinput);
1702: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1703: my $udir=propath($udom,$uname).'/userfiles';
1704: unless (-e $udir) { mkdir($udir,0770); }
1705: if (-e $udir) {
1706: $ufile=~s/^[\.\~]+//;
1707: my $path = $udir;
1708: if ($ufile =~m|(.+)/([^/]+)$|) {
1709: my @parts=split('/',$1);
1710: foreach my $part (@parts) {
1711: $path .= '/'.$part;
1712: if ((-e $path)!=1) {
1713: mkdir($path,0770);
1714: }
1715: }
1716: }
1717: my $destname=$udir.'/'.$ufile;
1718: my $transname=$udir.'/'.$ufile.'.in.transit';
1719: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1720: my $response;
1721: {
1722: my $ua=new LWP::UserAgent;
1723: my $request=new HTTP::Request('GET',"$remoteurl");
1724: $response=$ua->request($request,$transname);
1725: }
1726: if ($response->is_error()) {
1727: unlink($transname);
1728: my $message=$response->status_line;
1729: &logthis("LWP GET: $message for $fname ($remoteurl)");
1730: print $client "failed\n";
1731: } else {
1732: if (!rename($transname,$destname)) {
1733: &logthis("Unable to move $transname to $destname");
1734: unlink($transname);
1735: print $client "failed\n";
1736: } else {
1737: print $client "ok\n";
1738: }
1739: }
1740: } else {
1741: print $client "not_home\n";
1742: }
1743: } else {
1744: Reply($client, "refused\n", $userinput);
1745: }
1746: # --------------------------------------------------------- remove a user file
1747: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
1748: if(isClient) {
1749: my ($cmd,$fname)=split(/:/,$userinput);
1750: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1751: &logthis("$udom - $uname - $ufile");
1752: if ($ufile =~m|/\.\./|) {
1753: # any files paths with /../ in them refuse
1754: # to deal with
1755: print $client "refused\n";
1756: } else {
1757: my $udir=propath($udom,$uname);
1758: if (-e $udir) {
1759: my $file=$udir.'/userfiles/'.$ufile;
1760: if (-e $file) {
1761: unlink($file);
1762: if (-e $file) {
1763: print $client "failed\n";
1764: } else {
1765: print $client "ok\n";
1766: }
1767: } else {
1768: print $client "not_found\n";
1769: }
1770: } else {
1771: print $client "not_home\n";
1772: }
1773: }
1774: } else {
1775: Reply($client, "refused\n", $userinput);
1776: }
1777: # ------------------------------------------ authenticate access to a user file
1778: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1779: if(isClient) {
1780: my ($cmd,$fname,$session)=split(/:/,$userinput);
1781: chomp($session);
1782: my $reply='non_auth';
1783: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1784: $session.'.id')) {
1785: while (my $line=<ENVIN>) {
1786: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1787: }
1788: close(ENVIN);
1789: print $client $reply."\n";
1790: } else {
1791: print $client "invalid_token\n";
1792: }
1793: } else {
1794: Reply($client, "refused\n", $userinput);
1795:
1796: }
1797: # ----------------------------------------------------------------- unsubscribe
1798: } elsif ($userinput =~ /^unsub/) {
1799: if(isClient) {
1800: my ($cmd,$fname)=split(/:/,$userinput);
1801: if (-e $fname) {
1802: print $client &unsub($fname,$clientip);
1803: } else {
1804: print $client "not_found\n";
1805: }
1806: } else {
1807: Reply($client, "refused\n", $userinput);
1808:
1809: }
1810: # ------------------------------------------------------------------- subscribe
1811: } elsif ($userinput =~ /^sub/) {
1812: if(isClient) {
1813: print $client &subscribe($userinput,$clientip);
1814: } else {
1815: Reply($client, "refused\n", $userinput);
1816:
1817: }
1818: # ------------------------------------------------------------- current version
1819: } elsif ($userinput =~ /^currentversion/) {
1820: if(isClient) {
1821: my ($cmd,$fname)=split(/:/,$userinput);
1822: print $client ¤tversion($fname)."\n";
1823: } else {
1824: Reply($client, "refused\n", $userinput);
1825:
1826: }
1827: # ------------------------------------------------------------------------- log
1828: } elsif ($userinput =~ /^log/) {
1829: if(isClient) {
1830: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1831: chomp($what);
1832: my $proname=propath($udom,$uname);
1833: my $now=time;
1834: {
1835: my $hfh;
1836: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1837: print $hfh "$now:$clientname:$what\n";
1838: print $client "ok\n";
1839: } else {
1840: print $client "error: ".($!+0)
1841: ." IO::File->new Failed "
1842: ."while attempting log\n";
1843: }
1844: }
1845: } else {
1846: Reply($client, "refused\n", $userinput);
1847:
1848: }
1849: # ------------------------------------------------------------------------- put
1850: } elsif ($userinput =~ /^put/) {
1851: if(isClient) {
1852: my ($cmd,$udom,$uname,$namespace,$what)
1853: =split(/:/,$userinput,5);
1854: $namespace=~s/\//\_/g;
1855: $namespace=~s/\W//g;
1856: if ($namespace ne 'roles') {
1857: chomp($what);
1858: my $proname=propath($udom,$uname);
1859: my $now=time;
1860: my @pairs=split(/\&/,$what);
1861: my %hash;
1862: if (tie(%hash,'GDBM_File',
1863: "$proname/$namespace.db",
1864: &GDBM_WRCREAT(),0640)) {
1865: unless ($namespace=~/^nohist\_/) {
1866: my $hfh;
1867: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1868: }
1869:
1870: foreach my $pair (@pairs) {
1871: my ($key,$value)=split(/=/,$pair);
1872: $hash{$key}=$value;
1873: }
1874: if (untie(%hash)) {
1875: print $client "ok\n";
1876: } else {
1877: print $client "error: ".($!+0)
1878: ." untie(GDBM) failed ".
1879: "while attempting put\n";
1880: }
1881: } else {
1882: print $client "error: ".($!)
1883: ." tie(GDBM) Failed ".
1884: "while attempting put\n";
1885: }
1886: } else {
1887: print $client "refused\n";
1888: }
1889: } else {
1890: Reply($client, "refused\n", $userinput);
1891:
1892: }
1893: # ------------------------------------------------------------------- inc
1894: } elsif ($userinput =~ /^inc:/) {
1895: if(isClient) {
1896: my ($cmd,$udom,$uname,$namespace,$what)
1897: =split(/:/,$userinput);
1898: $namespace=~s/\//\_/g;
1899: $namespace=~s/\W//g;
1900: if ($namespace ne 'roles') {
1901: chomp($what);
1902: my $proname=propath($udom,$uname);
1903: my $now=time;
1904: my @pairs=split(/\&/,$what);
1905: my %hash;
1906: if (tie(%hash,'GDBM_File',
1907: "$proname/$namespace.db",
1908: &GDBM_WRCREAT(),0640)) {
1909: unless ($namespace=~/^nohist\_/) {
1910: my $hfh;
1911: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1912: }
1913: foreach my $pair (@pairs) {
1914: my ($key,$value)=split(/=/,$pair);
1915: # We could check that we have a number...
1916: if (! defined($value) || $value eq '') {
1917: $value = 1;
1918: }
1919: $hash{$key}+=$value;
1920: }
1921: if (untie(%hash)) {
1922: print $client "ok\n";
1923: } else {
1924: print $client "error: ".($!+0)
1925: ." untie(GDBM) failed ".
1926: "while attempting inc\n";
1927: }
1928: } else {
1929: print $client "error: ".($!)
1930: ." tie(GDBM) Failed ".
1931: "while attempting inc\n";
1932: }
1933: } else {
1934: print $client "refused\n";
1935: }
1936: } else {
1937: Reply($client, "refused\n", $userinput);
1938:
1939: }
1940: # -------------------------------------------------------------------- rolesput
1941: } elsif ($userinput =~ /^rolesput/) {
1942: if(isClient) {
1943: &Debug("rolesput");
1944: if ($wasenc==1) {
1945: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1946: =split(/:/,$userinput);
1947: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1948: "user = ".$exeuser." udom=".$udom.
1949: "what = ".$what);
1950: my $namespace='roles';
1951: chomp($what);
1952: my $proname=propath($udom,$uname);
1953: my $now=time;
1954: my @pairs=split(/\&/,$what);
1955: my %hash;
1956: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1957: {
1958: my $hfh;
1959: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1960: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1961: }
1962: }
1963:
1964: foreach my $pair (@pairs) {
1965: my ($key,$value)=split(/=/,$pair);
1966: &ManagePermissions($key, $udom, $uname,
1967: &GetAuthType( $udom,
1968: $uname));
1969: $hash{$key}=$value;
1970: }
1971: if (untie(%hash)) {
1972: print $client "ok\n";
1973: } else {
1974: print $client "error: ".($!+0)
1975: ." untie(GDBM) Failed ".
1976: "while attempting rolesput\n";
1977: }
1978: } else {
1979: print $client "error: ".($!+0)
1980: ." tie(GDBM) Failed ".
1981: "while attempting rolesput\n";
1982: }
1983: } else {
1984: print $client "refused\n";
1985: }
1986: } else {
1987: Reply($client, "refused\n", $userinput);
1988:
1989: }
1990: # -------------------------------------------------------------------- rolesdel
1991: } elsif ($userinput =~ /^rolesdel/) {
1992: if(isClient) {
1993: &Debug("rolesdel");
1994: if ($wasenc==1) {
1995: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1996: =split(/:/,$userinput);
1997: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1998: "user = ".$exeuser." udom=".$udom.
1999: "what = ".$what);
2000: my $namespace='roles';
2001: chomp($what);
2002: my $proname=propath($udom,$uname);
2003: my $now=time;
2004: my @rolekeys=split(/\&/,$what);
2005: my %hash;
2006: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2007: {
2008: my $hfh;
2009: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2010: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2011: }
2012: }
2013: foreach my $key (@rolekeys) {
2014: delete $hash{$key};
2015: }
2016: if (untie(%hash)) {
2017: print $client "ok\n";
2018: } else {
2019: print $client "error: ".($!+0)
2020: ." untie(GDBM) Failed ".
2021: "while attempting rolesdel\n";
2022: }
2023: } else {
2024: print $client "error: ".($!+0)
2025: ." tie(GDBM) Failed ".
2026: "while attempting rolesdel\n";
2027: }
2028: } else {
2029: print $client "refused\n";
2030: }
2031: } else {
2032: Reply($client, "refused\n", $userinput);
2033:
2034: }
2035: # ------------------------------------------------------------------------- get
2036: } elsif ($userinput =~ /^get/) {
2037: if(isClient) {
2038: my ($cmd,$udom,$uname,$namespace,$what)
2039: =split(/:/,$userinput);
2040: $namespace=~s/\//\_/g;
2041: $namespace=~s/\W//g;
2042: chomp($what);
2043: my @queries=split(/\&/,$what);
2044: my $proname=propath($udom,$uname);
2045: my $qresult='';
2046: my %hash;
2047: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2048: for (my $i=0;$i<=$#queries;$i++) {
2049: $qresult.="$hash{$queries[$i]}&";
2050: }
2051: if (untie(%hash)) {
2052: $qresult=~s/\&$//;
2053: print $client "$qresult\n";
2054: } else {
2055: print $client "error: ".($!+0)
2056: ." untie(GDBM) Failed ".
2057: "while attempting get\n";
2058: }
2059: } else {
2060: if ($!+0 == 2) {
2061: print $client "error:No such file or ".
2062: "GDBM reported bad block error\n";
2063: } else {
2064: print $client "error: ".($!+0)
2065: ." tie(GDBM) Failed ".
2066: "while attempting get\n";
2067: }
2068: }
2069: } else {
2070: Reply($client, "refused\n", $userinput);
2071:
2072: }
2073: # ------------------------------------------------------------------------ eget
2074: } elsif ($userinput =~ /^eget/) {
2075: if (isClient) {
2076: my ($cmd,$udom,$uname,$namespace,$what)
2077: =split(/:/,$userinput);
2078: $namespace=~s/\//\_/g;
2079: $namespace=~s/\W//g;
2080: chomp($what);
2081: my @queries=split(/\&/,$what);
2082: my $proname=propath($udom,$uname);
2083: my $qresult='';
2084: my %hash;
2085: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2086: for (my $i=0;$i<=$#queries;$i++) {
2087: $qresult.="$hash{$queries[$i]}&";
2088: }
2089: if (untie(%hash)) {
2090: $qresult=~s/\&$//;
2091: if ($cipher) {
2092: my $cmdlength=length($qresult);
2093: $qresult.=" ";
2094: my $encqresult='';
2095: for
2096: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2097: $encqresult.=
2098: unpack("H16",
2099: $cipher->encrypt(substr($qresult,$encidx,8)));
2100: }
2101: print $client "enc:$cmdlength:$encqresult\n";
2102: } else {
2103: print $client "error:no_key\n";
2104: }
2105: } else {
2106: print $client "error: ".($!+0)
2107: ." untie(GDBM) Failed ".
2108: "while attempting eget\n";
2109: }
2110: } else {
2111: print $client "error: ".($!+0)
2112: ." tie(GDBM) Failed ".
2113: "while attempting eget\n";
2114: }
2115: } else {
2116: Reply($client, "refused\n", $userinput);
2117:
2118: }
2119: # ------------------------------------------------------------------------- del
2120: } elsif ($userinput =~ /^del/) {
2121: if(isClient) {
2122: my ($cmd,$udom,$uname,$namespace,$what)
2123: =split(/:/,$userinput);
2124: $namespace=~s/\//\_/g;
2125: $namespace=~s/\W//g;
2126: chomp($what);
2127: my $proname=propath($udom,$uname);
2128: my $now=time;
2129: my @keys=split(/\&/,$what);
2130: my %hash;
2131: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2132: unless ($namespace=~/^nohist\_/) {
2133: my $hfh;
2134: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }
2135: }
2136: foreach my $key (@keys) {
2137: delete($hash{$key});
2138: }
2139: if (untie(%hash)) {
2140: print $client "ok\n";
2141: } else {
2142: print $client "error: ".($!+0)
2143: ." untie(GDBM) Failed ".
2144: "while attempting del\n";
2145: }
2146: } else {
2147: print $client "error: ".($!+0)
2148: ." tie(GDBM) Failed ".
2149: "while attempting del\n";
2150: }
2151: } else {
2152: Reply($client, "refused\n", $userinput);
2153:
2154: }
2155: # ------------------------------------------------------------------------ keys
2156: } elsif ($userinput =~ /^keys/) {
2157: if(isClient) {
2158: my ($cmd,$udom,$uname,$namespace)
2159: =split(/:/,$userinput);
2160: $namespace=~s/\//\_/g;
2161: $namespace=~s/\W//g;
2162: my $proname=propath($udom,$uname);
2163: my $qresult='';
2164: my %hash;
2165: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2166: foreach my $key (keys %hash) {
2167: $qresult.="$key&";
2168: }
2169: if (untie(%hash)) {
2170: $qresult=~s/\&$//;
2171: print $client "$qresult\n";
2172: } else {
2173: print $client "error: ".($!+0)
2174: ." untie(GDBM) Failed ".
2175: "while attempting keys\n";
2176: }
2177: } else {
2178: print $client "error: ".($!+0)
2179: ." tie(GDBM) Failed ".
2180: "while attempting keys\n";
2181: }
2182: } else {
2183: Reply($client, "refused\n", $userinput);
2184:
2185: }
2186: # ----------------------------------------------------------------- dumpcurrent
2187: } elsif ($userinput =~ /^currentdump/) {
2188: if (isClient) {
2189: my ($cmd,$udom,$uname,$namespace)
2190: =split(/:/,$userinput);
2191: $namespace=~s/\//\_/g;
2192: $namespace=~s/\W//g;
2193: my $qresult='';
2194: my $proname=propath($udom,$uname);
2195: my %hash;
2196: if (tie(%hash,'GDBM_File',
2197: "$proname/$namespace.db",
2198: &GDBM_READER(),0640)) {
2199: # Structure of %data:
2200: # $data{$symb}->{$parameter}=$value;
2201: # $data{$symb}->{'v.'.$parameter}=$version;
2202: # since $parameter will be unescaped, we do not
2203: # have to worry about silly parameter names...
2204: my %data = ();
2205: while (my ($key,$value) = each(%hash)) {
2206: my ($v,$symb,$param) = split(/:/,$key);
2207: next if ($v eq 'version' || $symb eq 'keys');
2208: next if (exists($data{$symb}) &&
2209: exists($data{$symb}->{$param}) &&
2210: $data{$symb}->{'v.'.$param} > $v);
2211: $data{$symb}->{$param}=$value;
2212: $data{$symb}->{'v.'.$param}=$v;
2213: }
2214: if (untie(%hash)) {
2215: while (my ($symb,$param_hash) = each(%data)) {
2216: while(my ($param,$value) = each (%$param_hash)){
2217: next if ($param =~ /^v\./);
2218: $qresult.=$symb.':'.$param.'='.$value.'&';
2219: }
2220: }
2221: chop($qresult);
2222: print $client "$qresult\n";
2223: } else {
2224: print $client "error: ".($!+0)
2225: ." untie(GDBM) Failed ".
2226: "while attempting currentdump\n";
2227: }
2228: } else {
2229: print $client "error: ".($!+0)
2230: ." tie(GDBM) Failed ".
2231: "while attempting currentdump\n";
2232: }
2233: } else {
2234: Reply($client, "refused\n", $userinput);
2235: }
2236: # ------------------------------------------------------------------------ dump
2237: } elsif ($userinput =~ /^dump/) {
2238: if(isClient) {
2239: my ($cmd,$udom,$uname,$namespace,$regexp)
2240: =split(/:/,$userinput);
2241: $namespace=~s/\//\_/g;
2242: $namespace=~s/\W//g;
2243: if (defined($regexp)) {
2244: $regexp=&unescape($regexp);
2245: } else {
2246: $regexp='.';
2247: }
2248: my $qresult='';
2249: my $proname=propath($udom,$uname);
2250: my %hash;
2251: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2252: while (my ($key,$value) = each(%hash)) {
2253: if ($regexp eq '.') {
2254: $qresult.=$key.'='.$value.'&';
2255: } else {
2256: my $unescapeKey = &unescape($key);
2257: if (eval('$unescapeKey=~/$regexp/')) {
2258: $qresult.="$key=$value&";
2259: }
2260: }
2261: }
2262: if (untie(%hash)) {
2263: chop($qresult);
2264: print $client "$qresult\n";
2265: } else {
2266: print $client "error: ".($!+0)
2267: ." untie(GDBM) Failed ".
2268: "while attempting dump\n";
2269: }
2270: } else {
2271: print $client "error: ".($!+0)
2272: ." tie(GDBM) Failed ".
2273: "while attempting dump\n";
2274: }
2275: } else {
2276: Reply($client, "refused\n", $userinput);
2277:
2278: }
2279: # ----------------------------------------------------------------------- store
2280: } elsif ($userinput =~ /^store/) {
2281: if(isClient) {
2282: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2283: =split(/:/,$userinput);
2284: $namespace=~s/\//\_/g;
2285: $namespace=~s/\W//g;
2286: if ($namespace ne 'roles') {
2287: chomp($what);
2288: my $proname=propath($udom,$uname);
2289: my $now=time;
2290: my @pairs=split(/\&/,$what);
2291: my %hash;
2292: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2293: unless ($namespace=~/^nohist\_/) {
2294: my $hfh;
2295: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2296: print $hfh "P:$now:$rid:$what\n";
2297: }
2298: }
2299: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2300: my $key;
2301: $hash{"version:$rid"}++;
2302: my $version=$hash{"version:$rid"};
2303: my $allkeys='';
2304: foreach my $pair (@pairs) {
2305: my ($key,$value)=split(/=/,$pair);
2306: $allkeys.=$key.':';
2307: $hash{"$version:$rid:$key"}=$value;
2308: }
2309: $hash{"$version:$rid:timestamp"}=$now;
2310: $allkeys.='timestamp';
2311: $hash{"$version:keys:$rid"}=$allkeys;
2312: if (untie(%hash)) {
2313: print $client "ok\n";
2314: } else {
2315: print $client "error: ".($!+0)
2316: ." untie(GDBM) Failed ".
2317: "while attempting store\n";
2318: }
2319: } else {
2320: print $client "error: ".($!+0)
2321: ." tie(GDBM) Failed ".
2322: "while attempting store\n";
2323: }
2324: } else {
2325: print $client "refused\n";
2326: }
2327: } else {
2328: Reply($client, "refused\n", $userinput);
2329:
2330: }
2331: # --------------------------------------------------------------------- restore
2332: } elsif ($userinput =~ /^restore/) {
2333: if(isClient) {
2334: my ($cmd,$udom,$uname,$namespace,$rid)
2335: =split(/:/,$userinput);
2336: $namespace=~s/\//\_/g;
2337: $namespace=~s/\W//g;
2338: chomp($rid);
2339: my $proname=propath($udom,$uname);
2340: my $qresult='';
2341: my %hash;
2342: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2343: my $version=$hash{"version:$rid"};
2344: $qresult.="version=$version&";
2345: my $scope;
2346: for ($scope=1;$scope<=$version;$scope++) {
2347: my $vkeys=$hash{"$scope:keys:$rid"};
2348: my @keys=split(/:/,$vkeys);
2349: my $key;
2350: $qresult.="$scope:keys=$vkeys&";
2351: foreach $key (@keys) {
2352: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2353: }
2354: }
2355: if (untie(%hash)) {
2356: $qresult=~s/\&$//;
2357: print $client "$qresult\n";
2358: } else {
2359: print $client "error: ".($!+0)
2360: ." untie(GDBM) Failed ".
2361: "while attempting restore\n";
2362: }
2363: } else {
2364: print $client "error: ".($!+0)
2365: ." tie(GDBM) Failed ".
2366: "while attempting restore\n";
2367: }
2368: } else {
2369: Reply($client, "refused\n", $userinput);
2370:
2371: }
2372: # -------------------------------------------------------------------- chatsend
2373: } elsif ($userinput =~ /^chatsend/) {
2374: if(isClient) {
2375: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2376: &chatadd($cdom,$cnum,$newpost);
2377: print $client "ok\n";
2378: } else {
2379: Reply($client, "refused\n", $userinput);
2380:
2381: }
2382: # -------------------------------------------------------------------- chatretr
2383: } elsif ($userinput =~ /^chatretr/) {
2384: if(isClient) {
2385: my
2386: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2387: my $reply='';
2388: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2389: $reply.=&escape($_).':';
2390: }
2391: $reply=~s/\:$//;
2392: print $client $reply."\n";
2393: } else {
2394: Reply($client, "refused\n", $userinput);
2395:
2396: }
2397: # ------------------------------------------------------------------- querysend
2398: } elsif ($userinput =~ /^querysend/) {
2399: if (isClient) {
2400: my ($cmd,$query,
2401: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2402: $query=~s/\n*$//g;
2403: print $client "".
2404: sqlreply("$clientname\&$query".
2405: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2406: } else {
2407: Reply($client, "refused\n", $userinput);
2408:
2409: }
2410: # ------------------------------------------------------------------ queryreply
2411: } elsif ($userinput =~ /^queryreply/) {
2412: if(isClient) {
2413: my ($cmd,$id,$reply)=split(/:/,$userinput);
2414: my $store;
2415: my $execdir=$perlvar{'lonDaemons'};
2416: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2417: $reply=~s/\&/\n/g;
2418: print $store $reply;
2419: close $store;
2420: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2421: print $store2 "done\n";
2422: close $store2;
2423: print $client "ok\n";
2424: }
2425: else {
2426: print $client "error: ".($!+0)
2427: ." IO::File->new Failed ".
2428: "while attempting queryreply\n";
2429: }
2430: } else {
2431: Reply($client, "refused\n", $userinput);
2432:
2433: }
2434: # ----------------------------------------------------------------- courseidput
2435: } elsif ($userinput =~ /^courseidput/) {
2436: if(isClient) {
2437: my ($cmd,$udom,$what)=split(/:/,$userinput);
2438: chomp($what);
2439: $udom=~s/\W//g;
2440: my $proname=
2441: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2442: my $now=time;
2443: my @pairs=split(/\&/,$what);
2444: my %hash;
2445: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2446: foreach my $pair (@pairs) {
2447: my ($key,$descr,$inst_code)=split(/=/,$pair);
2448: $hash{$key}=$descr.':'.$inst_code.':'.$now;
2449: }
2450: if (untie(%hash)) {
2451: print $client "ok\n";
2452: } else {
2453: print $client "error: ".($!+0)
2454: ." untie(GDBM) Failed ".
2455: "while attempting courseidput\n";
2456: }
2457: } else {
2458: print $client "error: ".($!+0)
2459: ." tie(GDBM) Failed ".
2460: "while attempting courseidput\n";
2461: }
2462: } else {
2463: Reply($client, "refused\n", $userinput);
2464:
2465: }
2466: # ---------------------------------------------------------------- courseiddump
2467: } elsif ($userinput =~ /^courseiddump/) {
2468: if(isClient) {
2469: my ($cmd,$udom,$since,$description)
2470: =split(/:/,$userinput);
2471: if (defined($description)) {
2472: $description=&unescape($description);
2473: } else {
2474: $description='.';
2475: }
2476: unless (defined($since)) { $since=0; }
2477: my $qresult='';
2478: my $proname=
2479: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2480: my %hash;
2481: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2482: while (my ($key,$value) = each(%hash)) {
2483: my ($descr,$lasttime,$inst_code);
2484: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
2485: ($descr,$inst_code,$lasttime)=($1,$2,$3);
2486: } else {
2487: ($descr,$lasttime) = split(/\:/,$value);
2488: }
2489: if ($lasttime<$since) { next; }
2490: if ($description eq '.') {
2491: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2492: } else {
2493: my $unescapeVal = &unescape($descr);
2494: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2495: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2496: }
2497: }
2498: }
2499: if (untie(%hash)) {
2500: chop($qresult);
2501: print $client "$qresult\n";
2502: } else {
2503: print $client "error: ".($!+0)
2504: ." untie(GDBM) Failed ".
2505: "while attempting courseiddump\n";
2506: }
2507: } else {
2508: print $client "error: ".($!+0)
2509: ." tie(GDBM) Failed ".
2510: "while attempting courseiddump\n";
2511: }
2512: } else {
2513: Reply($client, "refused\n", $userinput);
2514:
2515: }
2516: # ----------------------------------------------------------------------- idput
2517: } elsif ($userinput =~ /^idput/) {
2518: if(isClient) {
2519: my ($cmd,$udom,$what)=split(/:/,$userinput);
2520: chomp($what);
2521: $udom=~s/\W//g;
2522: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2523: my $now=time;
2524: my @pairs=split(/\&/,$what);
2525: my %hash;
2526: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2527: {
2528: my $hfh;
2529: if ($hfh=IO::File->new(">>$proname.hist")) {
2530: print $hfh "P:$now:$what\n";
2531: }
2532: }
2533: foreach my $pair (@pairs) {
2534: my ($key,$value)=split(/=/,$pair);
2535: $hash{$key}=$value;
2536: }
2537: if (untie(%hash)) {
2538: print $client "ok\n";
2539: } else {
2540: print $client "error: ".($!+0)
2541: ." untie(GDBM) Failed ".
2542: "while attempting idput\n";
2543: }
2544: } else {
2545: print $client "error: ".($!+0)
2546: ." tie(GDBM) Failed ".
2547: "while attempting idput\n";
2548: }
2549: } else {
2550: Reply($client, "refused\n", $userinput);
2551:
2552: }
2553: # ----------------------------------------------------------------------- idget
2554: } elsif ($userinput =~ /^idget/) {
2555: if(isClient) {
2556: my ($cmd,$udom,$what)=split(/:/,$userinput);
2557: chomp($what);
2558: $udom=~s/\W//g;
2559: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2560: my @queries=split(/\&/,$what);
2561: my $qresult='';
2562: my %hash;
2563: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2564: for (my $i=0;$i<=$#queries;$i++) {
2565: $qresult.="$hash{$queries[$i]}&";
2566: }
2567: if (untie(%hash)) {
2568: $qresult=~s/\&$//;
2569: print $client "$qresult\n";
2570: } else {
2571: print $client "error: ".($!+0)
2572: ." untie(GDBM) Failed ".
2573: "while attempting idget\n";
2574: }
2575: } else {
2576: print $client "error: ".($!+0)
2577: ." tie(GDBM) Failed ".
2578: "while attempting idget\n";
2579: }
2580: } else {
2581: Reply($client, "refused\n", $userinput);
2582:
2583: }
2584: # ---------------------------------------------------------------------- tmpput
2585: } elsif ($userinput =~ /^tmpput/) {
2586: if(isClient) {
2587: my ($cmd,$what)=split(/:/,$userinput);
2588: my $store;
2589: $tmpsnum++;
2590: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2591: $id=~s/\W/\_/g;
2592: $what=~s/\n//g;
2593: my $execdir=$perlvar{'lonDaemons'};
2594: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2595: print $store $what;
2596: close $store;
2597: print $client "$id\n";
2598: }
2599: else {
2600: print $client "error: ".($!+0)
2601: ."IO::File->new Failed ".
2602: "while attempting tmpput\n";
2603: }
2604: } else {
2605: Reply($client, "refused\n", $userinput);
2606:
2607: }
2608:
2609: # ---------------------------------------------------------------------- tmpget
2610: } elsif ($userinput =~ /^tmpget/) {
2611: if(isClient) {
2612: my ($cmd,$id)=split(/:/,$userinput);
2613: chomp($id);
2614: $id=~s/\W/\_/g;
2615: my $store;
2616: my $execdir=$perlvar{'lonDaemons'};
2617: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2618: my $reply=<$store>;
2619: print $client "$reply\n";
2620: close $store;
2621: }
2622: else {
2623: print $client "error: ".($!+0)
2624: ."IO::File->new Failed ".
2625: "while attempting tmpget\n";
2626: }
2627: } else {
2628: Reply($client, "refused\n", $userinput);
2629:
2630: }
2631: # ---------------------------------------------------------------------- tmpdel
2632: } elsif ($userinput =~ /^tmpdel/) {
2633: if(isClient) {
2634: my ($cmd,$id)=split(/:/,$userinput);
2635: chomp($id);
2636: $id=~s/\W/\_/g;
2637: my $execdir=$perlvar{'lonDaemons'};
2638: if (unlink("$execdir/tmp/$id.tmp")) {
2639: print $client "ok\n";
2640: } else {
2641: print $client "error: ".($!+0)
2642: ."Unlink tmp Failed ".
2643: "while attempting tmpdel\n";
2644: }
2645: } else {
2646: Reply($client, "refused\n", $userinput);
2647:
2648: }
2649: # ----------------------------------------- portfolio directory list (portls)
2650: } elsif ($userinput =~ /^portls/) {
2651: if(isClient) {
2652: my ($cmd,$uname,$udom)=split(/:/,$userinput);
2653: my $udir=propath($udom,$uname).'/userfiles/portfolio';
2654: my $dirLine='';
2655: my $dirContents='';
2656: if (opendir(LSDIR,$udir.'/')){
2657: while ($dirLine = readdir(LSDIR)){
2658: $dirContents = $dirContents.$dirLine.'<br />';
2659: }
2660: } else {
2661: $dirContents = "No directory found\n";
2662: }
2663: print $client $dirContents."\n";
2664: } else {
2665: Reply($client, "refused\n", $userinput);
2666: }
2667: # -------------------------------------------------------------------------- ls
2668: } elsif ($userinput =~ /^ls/) {
2669: if(isClient) {
2670: my $obs;
2671: my $rights;
2672: my ($cmd,$ulsdir)=split(/:/,$userinput);
2673: my $ulsout='';
2674: my $ulsfn;
2675: if (-e $ulsdir) {
2676: if(-d $ulsdir) {
2677: if (opendir(LSDIR,$ulsdir)) {
2678: while ($ulsfn=readdir(LSDIR)) {
2679: undef $obs, $rights;
2680: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2681: #We do some obsolete checking here
2682: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2683: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2684: my @obsolete=<FILE>;
2685: foreach my $obsolete (@obsolete) {
2686: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2687: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2688: }
2689: }
2690: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2691: if($obs eq '1') { $ulsout.="&1"; }
2692: else { $ulsout.="&0"; }
2693: if($rights eq '1') { $ulsout.="&1:"; }
2694: else { $ulsout.="&0:"; }
2695: }
2696: closedir(LSDIR);
2697: }
2698: } else {
2699: my @ulsstats=stat($ulsdir);
2700: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2701: }
2702: } else {
2703: $ulsout='no_such_dir';
2704: }
2705: if ($ulsout eq '') { $ulsout='empty'; }
2706: print $client "$ulsout\n";
2707: } else {
2708: Reply($client, "refused\n", $userinput);
2709:
2710: }
2711: # ----------------------------------------------------------------- setannounce
2712: } elsif ($userinput =~ /^setannounce/) {
2713: if (isClient) {
2714: my ($cmd,$announcement)=split(/:/,$userinput);
2715: chomp($announcement);
2716: $announcement=&unescape($announcement);
2717: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2718: '/announcement.txt')) {
2719: print $store $announcement;
2720: close $store;
2721: print $client "ok\n";
2722: } else {
2723: print $client "error: ".($!+0)."\n";
2724: }
2725: } else {
2726: Reply($client, "refused\n", $userinput);
2727:
2728: }
2729: # ------------------------------------------------------------------ Hanging up
2730: } elsif (($userinput =~ /^exit/) ||
2731: ($userinput =~ /^init/)) { # no restrictions.
2732: &logthis(
2733: "Client $clientip ($clientname) hanging up: $userinput");
2734: print $client "bye\n";
2735: $client->shutdown(2); # shutdown the socket forcibly.
2736: $client->close();
2737: return 0;
2738:
2739: # ---------------------------------- set current host/domain
2740: } elsif ($userinput =~ /^sethost:/) {
2741: if (isClient) {
2742: print $client &sethost($userinput)."\n";
2743: } else {
2744: print $client "refused\n";
2745: }
2746: #---------------------------------- request file (?) version.
2747: } elsif ($userinput =~/^version:/) {
2748: if (isClient) {
2749: print $client &version($userinput)."\n";
2750: } else {
2751: print $client "refused\n";
2752: }
2753: #------------------------------- is auto-enrollment enabled?
2754: } elsif ($userinput =~/^autorun:/) {
2755: if (isClient) {
2756: my ($cmd,$cdom) = split(/:/,$userinput);
2757: my $outcome = &localenroll::run($cdom);
2758: print $client "$outcome\n";
2759: } else {
2760: print $client "0\n";
2761: }
2762: #------------------------------- get official sections (for auto-enrollment).
2763: } elsif ($userinput =~/^autogetsections:/) {
2764: if (isClient) {
2765: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
2766: my @secs = &localenroll::get_sections($coursecode,$cdom);
2767: my $seclist = &escape(join(':',@secs));
2768: print $client "$seclist\n";
2769: } else {
2770: print $client "refused\n";
2771: }
2772: #----------------------- validate owner of new course section (for auto-enrollment).
2773: } elsif ($userinput =~/^autonewcourse:/) {
2774: if (isClient) {
2775: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
2776: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
2777: print $client "$outcome\n";
2778: } else {
2779: print $client "refused\n";
2780: }
2781: #-------------- validate course section in schedule of classes (for auto-enrollment).
2782: } elsif ($userinput =~/^autovalidatecourse:/) {
2783: if (isClient) {
2784: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
2785: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
2786: print $client "$outcome\n";
2787: } else {
2788: print $client "refused\n";
2789: }
2790: #--------------------------- create password for new user (for auto-enrollment).
2791: } elsif ($userinput =~/^autocreatepassword:/) {
2792: if (isClient) {
2793: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
2794: my ($create_passwd,$authchk);
2795: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
2796: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2797: } else {
2798: print $client "refused\n";
2799: }
2800: #--------------------------- read and remove temporary files (for auto-enrollment).
2801: } elsif ($userinput =~/^autoretrieve:/) {
2802: if (isClient) {
2803: my ($cmd,$filename) = split(/:/,$userinput);
2804: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2805: if ( (-e $source) && ($filename ne '') ) {
2806: my $reply = '';
2807: if (open(my $fh,$source)) {
2808: while (<$fh>) {
2809: chomp($_);
2810: $_ =~ s/^\s+//g;
2811: $_ =~ s/\s+$//g;
2812: $reply .= $_;
2813: }
2814: close($fh);
2815: print $client &escape($reply)."\n";
2816: # unlink($source);
2817: } else {
2818: print $client "error\n";
2819: }
2820: } else {
2821: print $client "error\n";
2822: }
2823: } else {
2824: print $client "refused\n";
2825: }
2826: #--------------------- read and retrieve institutional code format (for support form).
2827: } elsif ($userinput =~/^autoinstcodeformat:/) {
2828: if (isClient) {
2829: my $reply;
2830: my($cmd,$cdom,$course) = split(/:/,$userinput);
2831: my @pairs = split/\&/,$course;
2832: my %instcodes = ();
2833: my %codes = ();
2834: my @codetitles = ();
2835: my %cat_titles = ();
2836: my %cat_order = ();
2837: foreach (@pairs) {
2838: my ($key,$value) = split/=/,$_;
2839: $instcodes{&unescape($key)} = &unescape($value);
2840: }
2841: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
2842: if ($formatreply eq 'ok') {
2843: my $codes_str = &hash2str(%codes);
2844: my $codetitles_str = &array2str(@codetitles);
2845: my $cat_titles_str = &hash2str(%cat_titles);
2846: my $cat_order_str = &hash2str(%cat_order);
2847: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
2848: }
2849: } else {
2850: print $client "refused\n";
2851: }
2852: # ------------------------------------------------------------- unknown command
2853:
2854: } else {
2855: # unknown command
2856: print $client "unknown_cmd\n";
2857: }
2858: # -------------------------------------------------------------------- complete
2859: Debug("process_request - returning 1");
2860: return 1;
2861: }
2862: #
2863: # Decipher encoded traffic
2864: # Parameters:
2865: # input - Encoded data.
2866: # Returns:
2867: # Decoded data or undef if encryption key was not yet negotiated.
2868: # Implicit input:
2869: # cipher - This global holds the negotiated encryption key.
2870: #
2871: sub decipher {
2872: my ($input) = @_;
2873: my $output = '';
2874:
2875:
2876: if($cipher) {
2877: my($enc, $enclength, $encinput) = split(/:/, $input);
2878: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
2879: $output .=
2880: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
2881: }
2882: return substr($output, 0, $enclength);
2883: } else {
2884: return undef;
2885: }
2886: }
2887:
2888: #
2889: # Register a command processor. This function is invoked to register a sub
2890: # to process a request. Once registered, the ProcessRequest sub can automatically
2891: # dispatch requests to an appropriate sub, and do the top level validity checking
2892: # as well:
2893: # - Is the keyword recognized.
2894: # - Is the proper client type attempting the request.
2895: # - Is the request encrypted if it has to be.
2896: # Parameters:
2897: # $request_name - Name of the request being registered.
2898: # This is the command request that will match
2899: # against the hash keywords to lookup the information
2900: # associated with the dispatch information.
2901: # $procedure - Reference to a sub to call to process the request.
2902: # All subs get called as follows:
2903: # Procedure($cmd, $tail, $replyfd, $key)
2904: # $cmd - the actual keyword that invoked us.
2905: # $tail - the tail of the request that invoked us.
2906: # $replyfd- File descriptor connected to the client
2907: # $must_encode - True if the request must be encoded to be good.
2908: # $client_ok - True if it's ok for a client to request this.
2909: # $manager_ok - True if it's ok for a manager to request this.
2910: # Side effects:
2911: # - On success, the Dispatcher hash has an entry added for the key $RequestName
2912: # - On failure, the program will die as it's a bad internal bug to try to
2913: # register a duplicate command handler.
2914: #
2915: sub register_handler {
2916: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
2917:
2918: # Don't allow duplication#
2919:
2920: if (defined $Dispatcher{$request_name}) {
2921: die "Attempting to define a duplicate request handler for $request_name\n";
2922: }
2923: # Build the client type mask:
2924:
2925: my $client_type_mask = 0;
2926: if($client_ok) {
2927: $client_type_mask |= $CLIENT_OK;
2928: }
2929: if($manager_ok) {
2930: $client_type_mask |= $MANAGER_OK;
2931: }
2932:
2933: # Enter the hash:
2934:
2935: my @entry = ($procedure, $must_encode, $client_type_mask);
2936:
2937: $Dispatcher{$request_name} = \@entry;
2938:
2939:
2940: }
2941:
2942:
2943: #------------------------------------------------------------------
2944:
2945:
2946:
2947:
2948: #
2949: # Convert an error return code from lcpasswd to a string value.
2950: #
2951: sub lcpasswdstrerror {
2952: my $ErrorCode = shift;
2953: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
2954: return "lcpasswd Unrecognized error return value ".$ErrorCode;
2955: } else {
2956: return $passwderrors[$ErrorCode];
2957: }
2958: }
2959:
2960: #
2961: # Convert an error return code from lcuseradd to a string value:
2962: #
2963: sub lcuseraddstrerror {
2964: my $ErrorCode = shift;
2965: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
2966: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
2967: } else {
2968: return $adderrors[$ErrorCode];
2969: }
2970: }
2971:
2972: # grabs exception and records it to log before exiting
2973: sub catchexception {
2974: my ($error)=@_;
2975: $SIG{'QUIT'}='DEFAULT';
2976: $SIG{__DIE__}='DEFAULT';
2977: &status("Catching exception");
2978: &logthis("<font color='red'>CRITICAL: "
2979: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
2980: ."a crash with this error msg->[$error]</font>");
2981: &logthis('Famous last words: '.$status.' - '.$lastlog);
2982: if ($client) { print $client "error: $error\n"; }
2983: $server->close();
2984: die($error);
2985: }
2986:
2987: sub timeout {
2988: &status("Handling Timeout");
2989: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
2990: &catchexception('Timeout');
2991: }
2992: # -------------------------------- Set signal handlers to record abnormal exits
2993:
2994: $SIG{'QUIT'}=\&catchexception;
2995: $SIG{__DIE__}=\&catchexception;
2996:
2997: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
2998: &status("Read loncapa.conf and loncapa_apache.conf");
2999: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
3000: %perlvar=%{$perlvarref};
3001: undef $perlvarref;
3002:
3003: # ----------------------------- Make sure this process is running from user=www
3004: my $wwwid=getpwnam('www');
3005: if ($wwwid!=$<) {
3006: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3007: my $subj="LON: $currenthostid User ID mismatch";
3008: system("echo 'User ID mismatch. lond must be run as user www.' |\
3009: mailto $emailto -s '$subj' > /dev/null");
3010: exit 1;
3011: }
3012:
3013: # --------------------------------------------- Check if other instance running
3014:
3015: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3016:
3017: if (-e $pidfile) {
3018: my $lfh=IO::File->new("$pidfile");
3019: my $pide=<$lfh>;
3020: chomp($pide);
3021: if (kill 0 => $pide) { die "already running"; }
3022: }
3023:
3024: # ------------------------------------------------------------- Read hosts file
3025:
3026:
3027:
3028: # establish SERVER socket, bind and listen.
3029: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3030: Type => SOCK_STREAM,
3031: Proto => 'tcp',
3032: Reuse => 1,
3033: Listen => 10 )
3034: or die "making socket: $@\n";
3035:
3036: # --------------------------------------------------------- Do global variables
3037:
3038: # global variables
3039:
3040: my %children = (); # keys are current child process IDs
3041:
3042: sub REAPER { # takes care of dead children
3043: $SIG{CHLD} = \&REAPER;
3044: &status("Handling child death");
3045: my $pid;
3046: do {
3047: $pid = waitpid(-1,&WNOHANG());
3048: if (defined($children{$pid})) {
3049: &logthis("Child $pid died");
3050: delete($children{$pid});
3051: } elsif ($pid > 0) {
3052: &logthis("Unknown Child $pid died");
3053: }
3054: } while ( $pid > 0 );
3055: foreach my $child (keys(%children)) {
3056: $pid = waitpid($child,&WNOHANG());
3057: if ($pid > 0) {
3058: &logthis("Child $child - $pid looks like we missed it's death");
3059: delete($children{$pid});
3060: }
3061: }
3062: &status("Finished Handling child death");
3063: }
3064:
3065: sub HUNTSMAN { # signal handler for SIGINT
3066: &status("Killing children (INT)");
3067: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3068: kill 'INT' => keys %children;
3069: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3070: my $execdir=$perlvar{'lonDaemons'};
3071: unlink("$execdir/logs/lond.pid");
3072: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
3073: &status("Done killing children");
3074: exit; # clean up with dignity
3075: }
3076:
3077: sub HUPSMAN { # signal handler for SIGHUP
3078: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3079: &status("Killing children for restart (HUP)");
3080: kill 'INT' => keys %children;
3081: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3082: &logthis("<font color='red'>CRITICAL: Restarting</font>");
3083: my $execdir=$perlvar{'lonDaemons'};
3084: unlink("$execdir/logs/lond.pid");
3085: &status("Restarting self (HUP)");
3086: exec("$execdir/lond"); # here we go again
3087: }
3088:
3089: #
3090: # Kill off hashes that describe the host table prior to re-reading it.
3091: # Hashes affected are:
3092: # %hostid, %hostdom %hostip %hostdns.
3093: #
3094: sub KillHostHashes {
3095: foreach my $key (keys %hostid) {
3096: delete $hostid{$key};
3097: }
3098: foreach my $key (keys %hostdom) {
3099: delete $hostdom{$key};
3100: }
3101: foreach my $key (keys %hostip) {
3102: delete $hostip{$key};
3103: }
3104: foreach my $key (keys %hostdns) {
3105: delete $hostdns{$key};
3106: }
3107: }
3108: #
3109: # Read in the host table from file and distribute it into the various hashes:
3110: #
3111: # - %hostid - Indexed by IP, the loncapa hostname.
3112: # - %hostdom - Indexed by loncapa hostname, the domain.
3113: # - %hostip - Indexed by hostid, the Ip address of the host.
3114: sub ReadHostTable {
3115:
3116: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
3117: my $myloncapaname = $perlvar{'lonHostID'};
3118: Debug("My loncapa name is : $myloncapaname");
3119: while (my $configline=<CONFIG>) {
3120: if (!($configline =~ /^\s*\#/)) {
3121: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3122: chomp($ip); $ip=~s/\D+$//;
3123: $hostid{$ip}=$id; # LonCAPA name of host by IP.
3124: $hostdom{$id}=$domain; # LonCAPA domain name of host.
3125: $hostip{$id}=$ip; # IP address of host.
3126: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
3127:
3128: if ($id eq $perlvar{'lonHostID'}) {
3129: Debug("Found me in the host table: $name");
3130: $thisserver=$name;
3131: }
3132: }
3133: }
3134: close(CONFIG);
3135: }
3136: #
3137: # Reload the Apache daemon's state.
3138: # This is done by invoking /home/httpd/perl/apachereload
3139: # a setuid perl script that can be root for us to do this job.
3140: #
3141: sub ReloadApache {
3142: my $execdir = $perlvar{'lonDaemons'};
3143: my $script = $execdir."/apachereload";
3144: system($script);
3145: }
3146:
3147: #
3148: # Called in response to a USR2 signal.
3149: # - Reread hosts.tab
3150: # - All children connected to hosts that were removed from hosts.tab
3151: # are killed via SIGINT
3152: # - All children connected to previously existing hosts are sent SIGUSR1
3153: # - Our internal hosts hash is updated to reflect the new contents of
3154: # hosts.tab causing connections from hosts added to hosts.tab to
3155: # now be honored.
3156: #
3157: sub UpdateHosts {
3158: &status("Reload hosts.tab");
3159: logthis('<font color="blue"> Updating connections </font>');
3160: #
3161: # The %children hash has the set of IP's we currently have children
3162: # on. These need to be matched against records in the hosts.tab
3163: # Any ip's no longer in the table get killed off they correspond to
3164: # either dropped or changed hosts. Note that the re-read of the table
3165: # will take care of new and changed hosts as connections come into being.
3166:
3167:
3168: KillHostHashes;
3169: ReadHostTable;
3170:
3171: foreach my $child (keys %children) {
3172: my $childip = $children{$child};
3173: if(!$hostid{$childip}) {
3174: logthis('<font color="blue"> UpdateHosts killing child '
3175: ." $child for ip $childip </font>");
3176: kill('INT', $child);
3177: } else {
3178: logthis('<font color="green"> keeping child for ip '
3179: ." $childip (pid=$child) </font>");
3180: }
3181: }
3182: ReloadApache;
3183: &status("Finished reloading hosts.tab");
3184: }
3185:
3186:
3187: sub checkchildren {
3188: &status("Checking on the children (sending signals)");
3189: &initnewstatus();
3190: &logstatus();
3191: &logthis('Going to check on the children');
3192: my $docdir=$perlvar{'lonDocRoot'};
3193: foreach (sort keys %children) {
3194: sleep 1;
3195: unless (kill 'USR1' => $_) {
3196: &logthis ('Child '.$_.' is dead');
3197: &logstatus($$.' is dead');
3198: }
3199: }
3200: sleep 5;
3201: $SIG{ALRM} = sub { Debug("timeout");
3202: die "timeout"; };
3203: $SIG{__DIE__} = 'DEFAULT';
3204: &status("Checking on the children (waiting for reports)");
3205: foreach (sort keys %children) {
3206: unless (-e "$docdir/lon-status/londchld/$_.txt") {
3207: eval {
3208: alarm(300);
3209: &logthis('Child '.$_.' did not respond');
3210: kill 9 => $_;
3211: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3212: #$subj="LON: $currenthostid killed lond process $_";
3213: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3214: #$execdir=$perlvar{'lonDaemons'};
3215: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3216: alarm(0);
3217: }
3218: }
3219: }
3220: $SIG{ALRM} = 'DEFAULT';
3221: $SIG{__DIE__} = \&catchexception;
3222: &status("Finished checking children");
3223: }
3224:
3225: # --------------------------------------------------------------------- Logging
3226:
3227: sub logthis {
3228: my $message=shift;
3229: my $execdir=$perlvar{'lonDaemons'};
3230: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3231: my $now=time;
3232: my $local=localtime($now);
3233: $lastlog=$local.': '.$message;
3234: print $fh "$local ($$): $message\n";
3235: }
3236:
3237: # ------------------------- Conditional log if $DEBUG true.
3238: sub Debug {
3239: my $message = shift;
3240: if($DEBUG) {
3241: &logthis($message);
3242: }
3243: }
3244:
3245: #
3246: # Sub to do replies to client.. this gives a hook for some
3247: # debug tracing too:
3248: # Parameters:
3249: # fd - File open on client.
3250: # reply - Text to send to client.
3251: # request - Original request from client.
3252: #
3253: sub Reply {
3254: my ($fd, $reply, $request) = @_;
3255: print $fd $reply;
3256: Debug("Request was $request Reply was $reply");
3257:
3258: $Transactions++;
3259:
3260:
3261: }
3262:
3263:
3264: #
3265: # Sub to report a failure.
3266: # This function:
3267: # - Increments the failure statistic counters.
3268: # - Invokes Reply to send the error message to the client.
3269: # Parameters:
3270: # fd - File descriptor open on the client
3271: # reply - Reply text to emit.
3272: # request - The original request message (used by Reply
3273: # to debug if that's enabled.
3274: # Implicit outputs:
3275: # $Failures- The number of failures is incremented.
3276: # Reply (invoked here) sends a message to the
3277: # client:
3278: #
3279: sub Failure {
3280: my $fd = shift;
3281: my $reply = shift;
3282: my $request = shift;
3283:
3284: $Failures++;
3285: Reply($fd, $reply, $request); # That's simple eh?
3286: }
3287: # ------------------------------------------------------------------ Log status
3288:
3289: sub logstatus {
3290: &status("Doing logging");
3291: my $docdir=$perlvar{'lonDocRoot'};
3292: {
3293: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
3294: print $fh $$."\t".$clientname."\t".$currenthostid."\t"
3295: .$status."\t".$lastlog."\t $keymode\n";
3296: $fh->close();
3297: }
3298: &status("Finished londstatus.txt");
3299: {
3300: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3301: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
3302: $fh->close();
3303: }
3304: &status("Finished logging");
3305: }
3306:
3307: sub initnewstatus {
3308: my $docdir=$perlvar{'lonDocRoot'};
3309: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3310: my $now=time;
3311: my $local=localtime($now);
3312: print $fh "LOND status $local - parent $$\n\n";
3313: opendir(DIR,"$docdir/lon-status/londchld");
3314: while (my $filename=readdir(DIR)) {
3315: unlink("$docdir/lon-status/londchld/$filename");
3316: }
3317: closedir(DIR);
3318: }
3319:
3320: # -------------------------------------------------------------- Status setting
3321:
3322: sub status {
3323: my $what=shift;
3324: my $now=time;
3325: my $local=localtime($now);
3326: $status=$local.': '.$what;
3327: $0='lond: '.$what.' '.$local;
3328: }
3329:
3330: # -------------------------------------------------------- Escape Special Chars
3331:
3332: sub escape {
3333: my $str=shift;
3334: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3335: return $str;
3336: }
3337:
3338: # ----------------------------------------------------- Un-Escape Special Chars
3339:
3340: sub unescape {
3341: my $str=shift;
3342: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3343: return $str;
3344: }
3345:
3346: # ----------------------------------------------------------- Send USR1 to lonc
3347:
3348: sub reconlonc {
3349: my $peerfile=shift;
3350: &logthis("Trying to reconnect for $peerfile");
3351: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3352: if (my $fh=IO::File->new("$loncfile")) {
3353: my $loncpid=<$fh>;
3354: chomp($loncpid);
3355: if (kill 0 => $loncpid) {
3356: &logthis("lonc at pid $loncpid responding, sending USR1");
3357: kill USR1 => $loncpid;
3358: } else {
3359: &logthis(
3360: "<font color='red'>CRITICAL: "
3361: ."lonc at pid $loncpid not responding, giving up</font>");
3362: }
3363: } else {
3364: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
3365: }
3366: }
3367:
3368: # -------------------------------------------------- Non-critical communication
3369:
3370: sub subreply {
3371: my ($cmd,$server)=@_;
3372: my $peerfile="$perlvar{'lonSockDir'}/$server";
3373: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3374: Type => SOCK_STREAM,
3375: Timeout => 10)
3376: or return "con_lost";
3377: print $sclient "$cmd\n";
3378: my $answer=<$sclient>;
3379: chomp($answer);
3380: if (!$answer) { $answer="con_lost"; }
3381: return $answer;
3382: }
3383:
3384: sub reply {
3385: my ($cmd,$server)=@_;
3386: my $answer;
3387: if ($server ne $currenthostid) {
3388: $answer=subreply($cmd,$server);
3389: if ($answer eq 'con_lost') {
3390: $answer=subreply("ping",$server);
3391: if ($answer ne $server) {
3392: &logthis("sub reply: answer != server answer is $answer, server is $server");
3393: &reconlonc("$perlvar{'lonSockDir'}/$server");
3394: }
3395: $answer=subreply($cmd,$server);
3396: }
3397: } else {
3398: $answer='self_reply';
3399: }
3400: return $answer;
3401: }
3402:
3403: # -------------------------------------------------------------- Talk to lonsql
3404:
3405: sub sqlreply {
3406: my ($cmd)=@_;
3407: my $answer=subsqlreply($cmd);
3408: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3409: return $answer;
3410: }
3411:
3412: sub subsqlreply {
3413: my ($cmd)=@_;
3414: my $unixsock="mysqlsock";
3415: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3416: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3417: Type => SOCK_STREAM,
3418: Timeout => 10)
3419: or return "con_lost";
3420: print $sclient "$cmd\n";
3421: my $answer=<$sclient>;
3422: chomp($answer);
3423: if (!$answer) { $answer="con_lost"; }
3424: return $answer;
3425: }
3426:
3427: # -------------------------------------------- Return path to profile directory
3428:
3429: sub propath {
3430: my ($udom,$uname)=@_;
3431: $udom=~s/\W//g;
3432: $uname=~s/\W//g;
3433: my $subdir=$uname.'__';
3434: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3435: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3436: return $proname;
3437: }
3438:
3439: # --------------------------------------- Is this the home server of an author?
3440:
3441: sub ishome {
3442: my $author=shift;
3443: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3444: my ($udom,$uname)=split(/\//,$author);
3445: my $proname=propath($udom,$uname);
3446: if (-e $proname) {
3447: return 'owner';
3448: } else {
3449: return 'not_owner';
3450: }
3451: }
3452:
3453: # ======================================================= Continue main program
3454: # ---------------------------------------------------- Fork once and dissociate
3455:
3456: my $fpid=fork;
3457: exit if $fpid;
3458: die "Couldn't fork: $!" unless defined ($fpid);
3459:
3460: POSIX::setsid() or die "Can't start new session: $!";
3461:
3462: # ------------------------------------------------------- Write our PID on disk
3463:
3464: my $execdir=$perlvar{'lonDaemons'};
3465: open (PIDSAVE,">$execdir/logs/lond.pid");
3466: print PIDSAVE "$$\n";
3467: close(PIDSAVE);
3468: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
3469: &status('Starting');
3470:
3471:
3472:
3473: # ----------------------------------------------------- Install signal handlers
3474:
3475:
3476: $SIG{CHLD} = \&REAPER;
3477: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3478: $SIG{HUP} = \&HUPSMAN;
3479: $SIG{USR1} = \&checkchildren;
3480: $SIG{USR2} = \&UpdateHosts;
3481:
3482: # Read the host hashes:
3483:
3484: ReadHostTable;
3485:
3486: # --------------------------------------------------------------
3487: # Accept connections. When a connection comes in, it is validated
3488: # and if good, a child process is created to process transactions
3489: # along the connection.
3490:
3491: while (1) {
3492: &status('Starting accept');
3493: $client = $server->accept() or next;
3494: &status('Accepted '.$client.' off to spawn');
3495: make_new_child($client);
3496: &status('Finished spawning');
3497: }
3498:
3499: sub make_new_child {
3500: my $pid;
3501: # my $cipher; # Now global
3502: my $sigset;
3503:
3504: $client = shift;
3505: &status('Starting new child '.$client);
3506: &logthis('<font color="green"> Attempting to start child ('.$client.
3507: ")</font>");
3508: # block signal for fork
3509: $sigset = POSIX::SigSet->new(SIGINT);
3510: sigprocmask(SIG_BLOCK, $sigset)
3511: or die "Can't block SIGINT for fork: $!\n";
3512:
3513: die "fork: $!" unless defined ($pid = fork);
3514:
3515: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3516: # connection liveness.
3517:
3518: #
3519: # Figure out who we're talking to so we can record the peer in
3520: # the pid hash.
3521: #
3522: my $caller = getpeername($client);
3523: my ($port,$iaddr);
3524: if (defined($caller) && length($caller) > 0) {
3525: ($port,$iaddr)=unpack_sockaddr_in($caller);
3526: } else {
3527: &logthis("Unable to determine who caller was, getpeername returned nothing");
3528: }
3529: if (defined($iaddr)) {
3530: $clientip = inet_ntoa($iaddr);
3531: Debug("Connected with $clientip");
3532: $clientdns = gethostbyaddr($iaddr, AF_INET);
3533: Debug("Connected with $clientdns by name");
3534: } else {
3535: &logthis("Unable to determine clientip");
3536: $clientip='Unavailable';
3537: }
3538:
3539: if ($pid) {
3540: # Parent records the child's birth and returns.
3541: sigprocmask(SIG_UNBLOCK, $sigset)
3542: or die "Can't unblock SIGINT for fork: $!\n";
3543: $children{$pid} = $clientip;
3544: &status('Started child '.$pid);
3545: return;
3546: } else {
3547: # Child can *not* return from this subroutine.
3548: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
3549: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3550: #don't get intercepted
3551: $SIG{USR1}= \&logstatus;
3552: $SIG{ALRM}= \&timeout;
3553: $lastlog='Forked ';
3554: $status='Forked';
3555:
3556: # unblock signals
3557: sigprocmask(SIG_UNBLOCK, $sigset)
3558: or die "Can't unblock SIGINT for fork: $!\n";
3559:
3560: # my $tmpsnum=0; # Now global
3561: #---------------------------------------------------- kerberos 5 initialization
3562: &Authen::Krb5::init_context();
3563: &Authen::Krb5::init_ets();
3564:
3565: &status('Accepted connection');
3566: # =============================================================================
3567: # do something with the connection
3568: # -----------------------------------------------------------------------------
3569: # see if we know client and 'check' for spoof IP by ineffective challenge
3570:
3571: ReadManagerTable; # May also be a manager!!
3572:
3573: my $clientrec=($hostid{$clientip} ne undef);
3574: my $ismanager=($managers{$clientip} ne undef);
3575: $clientname = "[unknonwn]";
3576: if($clientrec) { # Establish client type.
3577: $ConnectionType = "client";
3578: $clientname = $hostid{$clientip};
3579: if($ismanager) {
3580: $ConnectionType = "both";
3581: }
3582: } else {
3583: $ConnectionType = "manager";
3584: $clientname = $managers{$clientip};
3585: }
3586: my $clientok;
3587:
3588: if ($clientrec || $ismanager) {
3589: &status("Waiting for init from $clientip $clientname");
3590: &logthis('<font color="yellow">INFO: Connection, '.
3591: $clientip.
3592: " ($clientname) connection type = $ConnectionType </font>" );
3593: &status("Connecting $clientip ($clientname))");
3594: my $remotereq=<$client>;
3595: chomp($remotereq);
3596: Debug("Got init: $remotereq");
3597: my $inikeyword = split(/:/, $remotereq);
3598: if ($remotereq =~ /^init/) {
3599: &sethost("sethost:$perlvar{'lonHostID'}");
3600: #
3601: # If the remote is attempting a local init... give that a try:
3602: #
3603: my ($i, $inittype) = split(/:/, $remotereq);
3604:
3605: # If the connection type is ssl, but I didn't get my
3606: # certificate files yet, then I'll drop back to
3607: # insecure (if allowed).
3608:
3609: if($inittype eq "ssl") {
3610: my ($ca, $cert) = lonssl::CertificateFile;
3611: my $kfile = lonssl::KeyFile;
3612: if((!$ca) ||
3613: (!$cert) ||
3614: (!$kfile)) {
3615: $inittype = ""; # This forces insecure attempt.
3616: &logthis("<font color=\"blue\"> Certificates not "
3617: ."installed -- trying insecure auth</font>");
3618: }
3619: else { # SSL certificates are in place so
3620: } # Leave the inittype alone.
3621: }
3622:
3623: if($inittype eq "local") {
3624: my $key = LocalConnection($client, $remotereq);
3625: if($key) {
3626: Debug("Got local key $key");
3627: $clientok = 1;
3628: my $cipherkey = pack("H32", $key);
3629: $cipher = new IDEA($cipherkey);
3630: print $client "ok:local\n";
3631: &logthis('<font color="green"'
3632: . "Successful local authentication </font>");
3633: $keymode = "local"
3634: } else {
3635: Debug("Failed to get local key");
3636: $clientok = 0;
3637: shutdown($client, 3);
3638: close $client;
3639: }
3640: } elsif ($inittype eq "ssl") {
3641: my $key = SSLConnection($client);
3642: if ($key) {
3643: $clientok = 1;
3644: my $cipherkey = pack("H32", $key);
3645: $cipher = new IDEA($cipherkey);
3646: &logthis('<font color="green">'
3647: ."Successfull ssl authentication with $clientname </font>");
3648: $keymode = "ssl";
3649:
3650: } else {
3651: $clientok = 0;
3652: close $client;
3653: }
3654:
3655: } else {
3656: my $ok = InsecureConnection($client);
3657: if($ok) {
3658: $clientok = 1;
3659: &logthis('<font color="green">'
3660: ."Successful insecure authentication with $clientname </font>");
3661: print $client "ok\n";
3662: $keymode = "insecure";
3663: } else {
3664: &logthis('<font color="yellow">'
3665: ."Attempted insecure connection disallowed </font>");
3666: close $client;
3667: $clientok = 0;
3668:
3669: }
3670: }
3671: } else {
3672: &logthis(
3673: "<font color='blue'>WARNING: "
3674: ."$clientip failed to initialize: >$remotereq< </font>");
3675: &status('No init '.$clientip);
3676: }
3677:
3678: } else {
3679: &logthis(
3680: "<font color='blue'>WARNING: Unknown client $clientip</font>");
3681: &status('Hung up on '.$clientip);
3682: }
3683:
3684: if ($clientok) {
3685: # ---------------- New known client connecting, could mean machine online again
3686:
3687: foreach my $id (keys(%hostip)) {
3688: if ($hostip{$id} ne $clientip ||
3689: $hostip{$currenthostid} eq $clientip) {
3690: # no need to try to do recon's to myself
3691: next;
3692: }
3693: &reconlonc("$perlvar{'lonSockDir'}/$id");
3694: }
3695: &logthis("<font color='green'>Established connection: $clientname</font>");
3696: &status('Will listen to '.$clientname);
3697: # ------------------------------------------------------------ Process requests
3698: my $keep_going = 1;
3699: my $user_input;
3700: while(($user_input = get_request) && $keep_going) {
3701: alarm(120);
3702: Debug("Main: Got $user_input\n");
3703: $keep_going = &process_request($user_input);
3704: alarm(0);
3705: &status('Listening to '.$clientname." ($keymode)");
3706: }
3707:
3708: # --------------------------------------------- client unknown or fishy, refuse
3709: } else {
3710: print $client "refused\n";
3711: $client->close();
3712: &logthis("<font color='blue'>WARNING: "
3713: ."Rejected client $clientip, closing connection</font>");
3714: }
3715: }
3716:
3717: # =============================================================================
3718:
3719: &logthis("<font color='red'>CRITICAL: "
3720: ."Disconnect from $clientip ($clientname)</font>");
3721:
3722:
3723: # this exit is VERY important, otherwise the child will become
3724: # a producer of more and more children, forking yourself into
3725: # process death.
3726: exit;
3727:
3728: }
3729:
3730:
3731: #
3732: # Checks to see if the input roleput request was to set
3733: # an author role. If so, invokes the lchtmldir script to set
3734: # up a correct public_html
3735: # Parameters:
3736: # request - The request sent to the rolesput subchunk.
3737: # We're looking for /domain/_au
3738: # domain - The domain in which the user is having roles doctored.
3739: # user - Name of the user for which the role is being put.
3740: # authtype - The authentication type associated with the user.
3741: #
3742: sub ManagePermissions
3743: {
3744:
3745: my ($request, $domain, $user, $authtype) = @_;
3746:
3747: # See if the request is of the form /$domain/_au
3748: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3749: my $execdir = $perlvar{'lonDaemons'};
3750: my $userhome= "/home/$user" ;
3751: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
3752: system("$execdir/lchtmldir $userhome $user $authtype");
3753: }
3754: }
3755: #
3756: # GetAuthType - Determines the authorization type of a user in a domain.
3757:
3758: # Returns the authorization type or nouser if there is no such user.
3759: #
3760: sub GetAuthType
3761: {
3762:
3763: my ($domain, $user) = @_;
3764:
3765: Debug("GetAuthType( $domain, $user ) \n");
3766: my $proname = &propath($domain, $user);
3767: my $passwdfile = "$proname/passwd";
3768: if( -e $passwdfile ) {
3769: my $pf = IO::File->new($passwdfile);
3770: my $realpassword = <$pf>;
3771: chomp($realpassword);
3772: Debug("Password info = $realpassword\n");
3773: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3774: Debug("Authtype = $authtype, content = $contentpwd\n");
3775: my $availinfo = '';
3776: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3777: $availinfo = $contentpwd;
3778: }
3779:
3780: return "$authtype:$availinfo";
3781: }
3782: else {
3783: Debug("Returning nouser");
3784: return "nouser";
3785: }
3786: }
3787:
3788: sub addline {
3789: my ($fname,$hostid,$ip,$newline)=@_;
3790: my $contents;
3791: my $found=0;
3792: my $expr='^'.$hostid.':'.$ip.':';
3793: $expr =~ s/\./\\\./g;
3794: my $sh;
3795: if ($sh=IO::File->new("$fname.subscription")) {
3796: while (my $subline=<$sh>) {
3797: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3798: }
3799: $sh->close();
3800: }
3801: $sh=IO::File->new(">$fname.subscription");
3802: if ($contents) { print $sh $contents; }
3803: if ($newline) { print $sh $newline; }
3804: $sh->close();
3805: return $found;
3806: }
3807:
3808: sub getchat {
3809: my ($cdom,$cname,$udom,$uname)=@_;
3810: my %hash;
3811: my $proname=&propath($cdom,$cname);
3812: my @entries=();
3813: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3814: &GDBM_READER(),0640)) {
3815: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3816: untie %hash;
3817: }
3818: my @participants=();
3819: my $cutoff=time-60;
3820: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
3821: &GDBM_WRCREAT(),0640)) {
3822: $hash{$uname.':'.$udom}=time;
3823: foreach (sort keys %hash) {
3824: if ($hash{$_}>$cutoff) {
3825: $participants[$#participants+1]='active_participant:'.$_;
3826: }
3827: }
3828: untie %hash;
3829: }
3830: return (@participants,@entries);
3831: }
3832:
3833: sub chatadd {
3834: my ($cdom,$cname,$newchat)=@_;
3835: my %hash;
3836: my $proname=&propath($cdom,$cname);
3837: my @entries=();
3838: my $time=time;
3839: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3840: &GDBM_WRCREAT(),0640)) {
3841: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3842: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
3843: my ($thentime,$idnum)=split(/\_/,$lastid);
3844: my $newid=$time.'_000000';
3845: if ($thentime==$time) {
3846: $idnum=~s/^0+//;
3847: $idnum++;
3848: $idnum=substr('000000'.$idnum,-6,6);
3849: $newid=$time.'_'.$idnum;
3850: }
3851: $hash{$newid}=$newchat;
3852: my $expired=$time-3600;
3853: foreach (keys %hash) {
3854: my ($thistime)=($_=~/(\d+)\_/);
3855: if ($thistime<$expired) {
3856: delete $hash{$_};
3857: }
3858: }
3859: untie %hash;
3860: }
3861: {
3862: my $hfh;
3863: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3864: print $hfh "$time:".&unescape($newchat)."\n";
3865: }
3866: }
3867: }
3868:
3869: sub unsub {
3870: my ($fname,$clientip)=@_;
3871: my $result;
3872: my $unsubs = 0; # Number of successful unsubscribes:
3873:
3874:
3875: # An old way subscriptions were handled was to have a
3876: # subscription marker file:
3877:
3878: Debug("Attempting unlink of $fname.$clientname");
3879: if (unlink("$fname.$clientname")) {
3880: $unsubs++; # Successful unsub via marker file.
3881: }
3882:
3883: # The more modern way to do it is to have a subscription list
3884: # file:
3885:
3886: if (-e "$fname.subscription") {
3887: my $found=&addline($fname,$clientname,$clientip,'');
3888: if ($found) {
3889: $unsubs++;
3890: }
3891: }
3892:
3893: # If either or both of these mechanisms succeeded in unsubscribing a
3894: # resource we can return ok:
3895:
3896: if($unsubs) {
3897: $result = "ok\n";
3898: } else {
3899: $result = "not_subscribed\n";
3900: }
3901:
3902: return $result;
3903: }
3904:
3905: sub currentversion {
3906: my $fname=shift;
3907: my $version=-1;
3908: my $ulsdir='';
3909: if ($fname=~/^(.+)\/[^\/]+$/) {
3910: $ulsdir=$1;
3911: }
3912: my ($fnamere1,$fnamere2);
3913: # remove version if already specified
3914: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
3915: # get the bits that go before and after the version number
3916: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
3917: $fnamere1=$1;
3918: $fnamere2='.'.$2;
3919: }
3920: if (-e $fname) { $version=1; }
3921: if (-e $ulsdir) {
3922: if(-d $ulsdir) {
3923: if (opendir(LSDIR,$ulsdir)) {
3924: my $ulsfn;
3925: while ($ulsfn=readdir(LSDIR)) {
3926: # see if this is a regular file (ignore links produced earlier)
3927: my $thisfile=$ulsdir.'/'.$ulsfn;
3928: unless (-l $thisfile) {
3929: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
3930: if ($1>$version) { $version=$1; }
3931: }
3932: }
3933: }
3934: closedir(LSDIR);
3935: $version++;
3936: }
3937: }
3938: }
3939: return $version;
3940: }
3941:
3942: sub thisversion {
3943: my $fname=shift;
3944: my $version=-1;
3945: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
3946: $version=$1;
3947: }
3948: return $version;
3949: }
3950:
3951: sub subscribe {
3952: my ($userinput,$clientip)=@_;
3953: my $result;
3954: my ($cmd,$fname)=split(/:/,$userinput);
3955: my $ownership=&ishome($fname);
3956: if ($ownership eq 'owner') {
3957: # explitly asking for the current version?
3958: unless (-e $fname) {
3959: my $currentversion=¤tversion($fname);
3960: if (&thisversion($fname)==$currentversion) {
3961: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
3962: my $root=$1;
3963: my $extension=$2;
3964: symlink($root.'.'.$extension,
3965: $root.'.'.$currentversion.'.'.$extension);
3966: unless ($extension=~/\.meta$/) {
3967: symlink($root.'.'.$extension.'.meta',
3968: $root.'.'.$currentversion.'.'.$extension.'.meta');
3969: }
3970: }
3971: }
3972: }
3973: if (-e $fname) {
3974: if (-d $fname) {
3975: $result="directory\n";
3976: } else {
3977: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
3978: my $now=time;
3979: my $found=&addline($fname,$clientname,$clientip,
3980: "$clientname:$clientip:$now\n");
3981: if ($found) { $result="$fname\n"; }
3982: # if they were subscribed to only meta data, delete that
3983: # subscription, when you subscribe to a file you also get
3984: # the metadata
3985: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
3986: $fname=~s/\/home\/httpd\/html\/res/raw/;
3987: $fname="http://$thisserver/".$fname;
3988: $result="$fname\n";
3989: }
3990: } else {
3991: $result="not_found\n";
3992: }
3993: } else {
3994: $result="rejected\n";
3995: }
3996: return $result;
3997: }
3998:
3999: sub make_passwd_file {
4000: my ($uname, $umode,$npass,$passfilename)=@_;
4001: my $result="ok\n";
4002: if ($umode eq 'krb4' or $umode eq 'krb5') {
4003: {
4004: my $pf = IO::File->new(">$passfilename");
4005: print $pf "$umode:$npass\n";
4006: }
4007: } elsif ($umode eq 'internal') {
4008: my $salt=time;
4009: $salt=substr($salt,6,2);
4010: my $ncpass=crypt($npass,$salt);
4011: {
4012: &Debug("Creating internal auth");
4013: my $pf = IO::File->new(">$passfilename");
4014: print $pf "internal:$ncpass\n";
4015: }
4016: } elsif ($umode eq 'localauth') {
4017: {
4018: my $pf = IO::File->new(">$passfilename");
4019: print $pf "localauth:$npass\n";
4020: }
4021: } elsif ($umode eq 'unix') {
4022: {
4023: #
4024: # Don't allow the creation of privileged accounts!!! that would
4025: # be real bad!!!
4026: #
4027: my $uid = getpwnam($uname);
4028: if((defined $uid) && ($uid == 0)) {
4029: &logthis(">>>Attempted to create privilged account blocked");
4030: return "no_priv_account_error\n";
4031: }
4032:
4033: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4034: {
4035: &Debug("Executing external: ".$execpath);
4036: &Debug("user = ".$uname.", Password =". $npass);
4037: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
4038: print $se "$uname\n";
4039: print $se "$npass\n";
4040: print $se "$npass\n";
4041: }
4042: my $useraddok = $?;
4043: if($useraddok > 0) {
4044: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
4045: }
4046: my $pf = IO::File->new(">$passfilename");
4047: print $pf "unix:\n";
4048: }
4049: } elsif ($umode eq 'none') {
4050: {
4051: my $pf = IO::File->new(">$passfilename");
4052: print $pf "none:\n";
4053: }
4054: } else {
4055: $result="auth_mode_error\n";
4056: }
4057: return $result;
4058: }
4059:
4060: sub sethost {
4061: my ($remotereq) = @_;
4062: my (undef,$hostid)=split(/:/,$remotereq);
4063: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4064: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
4065: $currenthostid =$hostid;
4066: $currentdomainid=$hostdom{$hostid};
4067: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4068: } else {
4069: &logthis("Requested host id $hostid not an alias of ".
4070: $perlvar{'lonHostID'}." refusing connection");
4071: return 'unable_to_set';
4072: }
4073: return 'ok';
4074: }
4075:
4076: sub version {
4077: my ($userinput)=@_;
4078: $remoteVERSION=(split(/:/,$userinput))[1];
4079: return "version:$VERSION";
4080: }
4081:
4082: #There is a copy of this in lonnet.pm
4083: sub userload {
4084: my $numusers=0;
4085: {
4086: opendir(LONIDS,$perlvar{'lonIDsDir'});
4087: my $filename;
4088: my $curtime=time;
4089: while ($filename=readdir(LONIDS)) {
4090: if ($filename eq '.' || $filename eq '..') {next;}
4091: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
4092: if ($curtime-$mtime < 1800) { $numusers++; }
4093: }
4094: closedir(LONIDS);
4095: }
4096: my $userloadpercent=0;
4097: my $maxuserload=$perlvar{'lonUserLoadLim'};
4098: if ($maxuserload) {
4099: $userloadpercent=100*$numusers/$maxuserload;
4100: }
4101: $userloadpercent=sprintf("%.2f",$userloadpercent);
4102: return $userloadpercent;
4103: }
4104:
4105: # Routines for serializing arrays and hashes (copies from lonnet)
4106:
4107: sub array2str {
4108: my (@array) = @_;
4109: my $result=&arrayref2str(\@array);
4110: $result=~s/^__ARRAY_REF__//;
4111: $result=~s/__END_ARRAY_REF__$//;
4112: return $result;
4113: }
4114:
4115: sub arrayref2str {
4116: my ($arrayref) = @_;
4117: my $result='__ARRAY_REF__';
4118: foreach my $elem (@$arrayref) {
4119: if(ref($elem) eq 'ARRAY') {
4120: $result.=&arrayref2str($elem).'&';
4121: } elsif(ref($elem) eq 'HASH') {
4122: $result.=&hashref2str($elem).'&';
4123: } elsif(ref($elem)) {
4124: #print("Got a ref of ".(ref($elem))." skipping.");
4125: } else {
4126: $result.=&escape($elem).'&';
4127: }
4128: }
4129: $result=~s/\&$//;
4130: $result .= '__END_ARRAY_REF__';
4131: return $result;
4132: }
4133:
4134: sub hash2str {
4135: my (%hash) = @_;
4136: my $result=&hashref2str(\%hash);
4137: $result=~s/^__HASH_REF__//;
4138: $result=~s/__END_HASH_REF__$//;
4139: return $result;
4140: }
4141:
4142: sub hashref2str {
4143: my ($hashref)=@_;
4144: my $result='__HASH_REF__';
4145: foreach (sort(keys(%$hashref))) {
4146: if (ref($_) eq 'ARRAY') {
4147: $result.=&arrayref2str($_).'=';
4148: } elsif (ref($_) eq 'HASH') {
4149: $result.=&hashref2str($_).'=';
4150: } elsif (ref($_)) {
4151: $result.='=';
4152: #print("Got a ref of ".(ref($_))." skipping.");
4153: } else {
4154: if ($_) {$result.=&escape($_).'=';} else { last; }
4155: }
4156:
4157: if(ref($hashref->{$_}) eq 'ARRAY') {
4158: $result.=&arrayref2str($hashref->{$_}).'&';
4159: } elsif(ref($hashref->{$_}) eq 'HASH') {
4160: $result.=&hashref2str($hashref->{$_}).'&';
4161: } elsif(ref($hashref->{$_})) {
4162: $result.='&';
4163: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
4164: } else {
4165: $result.=&escape($hashref->{$_}).'&';
4166: }
4167: }
4168: $result=~s/\&$//;
4169: $result .= '__END_HASH_REF__';
4170: return $result;
4171: }
4172:
4173: # ----------------------------------- POD (plain old documentation, CPAN style)
4174:
4175: =head1 NAME
4176:
4177: lond - "LON Daemon" Server (port "LOND" 5663)
4178:
4179: =head1 SYNOPSIS
4180:
4181: Usage: B<lond>
4182:
4183: Should only be run as user=www. This is a command-line script which
4184: is invoked by B<loncron>. There is no expectation that a typical user
4185: will manually start B<lond> from the command-line. (In other words,
4186: DO NOT START B<lond> YOURSELF.)
4187:
4188: =head1 DESCRIPTION
4189:
4190: There are two characteristics associated with the running of B<lond>,
4191: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4192: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4193: subscriptions, etc). These are described in two large
4194: sections below.
4195:
4196: B<PROCESS MANAGEMENT>
4197:
4198: Preforker - server who forks first. Runs as a daemon. HUPs.
4199: Uses IDEA encryption
4200:
4201: B<lond> forks off children processes that correspond to the other servers
4202: in the network. Management of these processes can be done at the
4203: parent process level or the child process level.
4204:
4205: B<logs/lond.log> is the location of log messages.
4206:
4207: The process management is now explained in terms of linux shell commands,
4208: subroutines internal to this code, and signal assignments:
4209:
4210: =over 4
4211:
4212: =item *
4213:
4214: PID is stored in B<logs/lond.pid>
4215:
4216: This is the process id number of the parent B<lond> process.
4217:
4218: =item *
4219:
4220: SIGTERM and SIGINT
4221:
4222: Parent signal assignment:
4223: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4224:
4225: Child signal assignment:
4226: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4227: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4228: to restart a new child.)
4229:
4230: Command-line invocations:
4231: B<kill> B<-s> SIGTERM I<PID>
4232: B<kill> B<-s> SIGINT I<PID>
4233:
4234: Subroutine B<HUNTSMAN>:
4235: This is only invoked for the B<lond> parent I<PID>.
4236: This kills all the children, and then the parent.
4237: The B<lonc.pid> file is cleared.
4238:
4239: =item *
4240:
4241: SIGHUP
4242:
4243: Current bug:
4244: This signal can only be processed the first time
4245: on the parent process. Subsequent SIGHUP signals
4246: have no effect.
4247:
4248: Parent signal assignment:
4249: $SIG{HUP} = \&HUPSMAN;
4250:
4251: Child signal assignment:
4252: none (nothing happens)
4253:
4254: Command-line invocations:
4255: B<kill> B<-s> SIGHUP I<PID>
4256:
4257: Subroutine B<HUPSMAN>:
4258: This is only invoked for the B<lond> parent I<PID>,
4259: This kills all the children, and then the parent.
4260: The B<lond.pid> file is cleared.
4261:
4262: =item *
4263:
4264: SIGUSR1
4265:
4266: Parent signal assignment:
4267: $SIG{USR1} = \&USRMAN;
4268:
4269: Child signal assignment:
4270: $SIG{USR1}= \&logstatus;
4271:
4272: Command-line invocations:
4273: B<kill> B<-s> SIGUSR1 I<PID>
4274:
4275: Subroutine B<USRMAN>:
4276: When invoked for the B<lond> parent I<PID>,
4277: SIGUSR1 is sent to all the children, and the status of
4278: each connection is logged.
4279:
4280: =item *
4281:
4282: SIGUSR2
4283:
4284: Parent Signal assignment:
4285: $SIG{USR2} = \&UpdateHosts
4286:
4287: Child signal assignment:
4288: NONE
4289:
4290:
4291: =item *
4292:
4293: SIGCHLD
4294:
4295: Parent signal assignment:
4296: $SIG{CHLD} = \&REAPER;
4297:
4298: Child signal assignment:
4299: none
4300:
4301: Command-line invocations:
4302: B<kill> B<-s> SIGCHLD I<PID>
4303:
4304: Subroutine B<REAPER>:
4305: This is only invoked for the B<lond> parent I<PID>.
4306: Information pertaining to the child is removed.
4307: The socket port is cleaned up.
4308:
4309: =back
4310:
4311: B<SERVER-SIDE ACTIVITIES>
4312:
4313: Server-side information can be accepted in an encrypted or non-encrypted
4314: method.
4315:
4316: =over 4
4317:
4318: =item ping
4319:
4320: Query a client in the hosts.tab table; "Are you there?"
4321:
4322: =item pong
4323:
4324: Respond to a ping query.
4325:
4326: =item ekey
4327:
4328: Read in encrypted key, make cipher. Respond with a buildkey.
4329:
4330: =item load
4331:
4332: Respond with CPU load based on a computation upon /proc/loadavg.
4333:
4334: =item currentauth
4335:
4336: Reply with current authentication information (only over an
4337: encrypted channel).
4338:
4339: =item auth
4340:
4341: Only over an encrypted channel, reply as to whether a user's
4342: authentication information can be validated.
4343:
4344: =item passwd
4345:
4346: Allow for a password to be set.
4347:
4348: =item makeuser
4349:
4350: Make a user.
4351:
4352: =item passwd
4353:
4354: Allow for authentication mechanism and password to be changed.
4355:
4356: =item home
4357:
4358: Respond to a question "are you the home for a given user?"
4359:
4360: =item update
4361:
4362: Update contents of a subscribed resource.
4363:
4364: =item unsubscribe
4365:
4366: The server is unsubscribing from a resource.
4367:
4368: =item subscribe
4369:
4370: The server is subscribing to a resource.
4371:
4372: =item log
4373:
4374: Place in B<logs/lond.log>
4375:
4376: =item put
4377:
4378: stores hash in namespace
4379:
4380: =item rolesput
4381:
4382: put a role into a user's environment
4383:
4384: =item get
4385:
4386: returns hash with keys from array
4387: reference filled in from namespace
4388:
4389: =item eget
4390:
4391: returns hash with keys from array
4392: reference filled in from namesp (encrypts the return communication)
4393:
4394: =item rolesget
4395:
4396: get a role from a user's environment
4397:
4398: =item del
4399:
4400: deletes keys out of array from namespace
4401:
4402: =item keys
4403:
4404: returns namespace keys
4405:
4406: =item dump
4407:
4408: dumps the complete (or key matching regexp) namespace into a hash
4409:
4410: =item store
4411:
4412: stores hash permanently
4413: for this url; hashref needs to be given and should be a \%hashname; the
4414: remaining args aren't required and if they aren't passed or are '' they will
4415: be derived from the ENV
4416:
4417: =item restore
4418:
4419: returns a hash for a given url
4420:
4421: =item querysend
4422:
4423: Tells client about the lonsql process that has been launched in response
4424: to a sent query.
4425:
4426: =item queryreply
4427:
4428: Accept information from lonsql and make appropriate storage in temporary
4429: file space.
4430:
4431: =item idput
4432:
4433: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4434: for each student, defined perhaps by the institutional Registrar.)
4435:
4436: =item idget
4437:
4438: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4439: for each student, defined perhaps by the institutional Registrar.)
4440:
4441: =item tmpput
4442:
4443: Accept and store information in temporary space.
4444:
4445: =item tmpget
4446:
4447: Send along temporarily stored information.
4448:
4449: =item ls
4450:
4451: List part of a user's directory.
4452:
4453: =item pushtable
4454:
4455: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4456: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4457: must be restored manually in case of a problem with the new table file.
4458: pushtable requires that the request be encrypted and validated via
4459: ValidateManager. The form of the command is:
4460: enc:pushtable tablename <tablecontents> \n
4461: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4462: cleartext newline.
4463:
4464: =item Hanging up (exit or init)
4465:
4466: What to do when a client tells the server that they (the client)
4467: are leaving the network.
4468:
4469: =item unknown command
4470:
4471: If B<lond> is sent an unknown command (not in the list above),
4472: it replys to the client "unknown_cmd".
4473:
4474:
4475: =item UNKNOWN CLIENT
4476:
4477: If the anti-spoofing algorithm cannot verify the client,
4478: the client is rejected (with a "refused" message sent
4479: to the client, and the connection is closed.
4480:
4481: =back
4482:
4483: =head1 PREREQUISITES
4484:
4485: IO::Socket
4486: IO::File
4487: Apache::File
4488: Symbol
4489: POSIX
4490: Crypt::IDEA
4491: LWP::UserAgent()
4492: GDBM_File
4493: Authen::Krb4
4494: Authen::Krb5
4495:
4496: =head1 COREQUISITES
4497:
4498: =head1 OSNAMES
4499:
4500: linux
4501:
4502: =head1 SCRIPT CATEGORIES
4503:
4504: Server/Process
4505:
4506: =cut
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