Annotation of loncom/lond, revision 1.220
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.220 ! foxr 5: # $Id: lond,v 1.219 2004/07/29 22:31:18 foxr Exp $
1.60 www 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.193 raeburn 48: use localenroll;
1.143 foxr 49: use File::Copy;
1.169 foxr 50: use LONCAPA::ConfigFileEdit;
1.200 matthew 51: use LONCAPA::lonlocal;
52: use LONCAPA::lonssl;
1.1 albertel 53:
1.204 albertel 54: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 55:
1.57 www 56: my $status='';
57: my $lastlog='';
58:
1.220 ! foxr 59: my $VERSION='$Revision: 1.219 $'; #' stupid emacs
1.121 albertel 60: my $remoteVERSION;
1.214 foxr 61: my $currenthostid="default";
1.115 albertel 62: my $currentdomainid;
1.134 albertel 63:
64: my $client;
1.200 matthew 65: my $clientip; # IP address of client.
66: my $clientdns; # DNS name of client.
67: my $clientname; # LonCAPA name of client.
1.140 foxr 68:
1.134 albertel 69: my $server;
1.200 matthew 70: my $thisserver; # DNS of us.
71:
72: my $keymode;
1.198 foxr 73:
1.207 foxr 74: my $cipher; # Cipher key negotiated with client
75: my $tmpsnum = 0; # Id of tmpputs.
76:
1.178 foxr 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: #
1.161 foxr 83:
1.178 foxr 84: my $ConnectionType;
1.161 foxr 85:
1.200 matthew 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.
1.161 foxr 90:
1.178 foxr 91: my %managers; # Ip -> manager names
1.161 foxr 92:
1.178 foxr 93: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 94:
1.178 foxr 95: #
1.207 foxr 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: #
1.178 foxr 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");
1.97 foxr 126:
127:
1.178 foxr 128: # The array below are lcuseradd error strings.:
1.97 foxr 129:
1.178 foxr 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");
1.97 foxr 145:
1.96 foxr 146:
1.207 foxr 147:
148: #
149: # Statistics that are maintained and dislayed in the status line.
150: #
1.212 foxr 151: my $Transactions = 0; # Number of attempted transactions.
152: my $Failures = 0; # Number of transcations failed.
1.207 foxr 153:
154: # ResetStatistics:
155: # Resets the statistics counters:
156: #
157: sub ResetStatistics {
158: $Transactions = 0;
159: $Failures = 0;
160: }
161:
162:
163:
1.200 matthew 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:
1.96 foxr 336: #
1.140 foxr 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: }
1.161 foxr 352:
1.178 foxr 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: }
1.161 foxr 365:
366:
1.156 foxr 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:
1.166 foxr 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
1.161 foxr 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: #
1.166 foxr 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: }
1.156 foxr 414: }
1.140 foxr 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:
1.163 foxr 426: return isManager;
1.140 foxr 427: }
428: #
1.143 foxr 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 {
1.192 foxr 440:
441: my ($oldfile, $newfile) = @_;
1.143 foxr 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: }
1.157 foxr 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:
1.166 foxr 500: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 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) {
1.166 foxr 505: my $ip = gethostbyname($name);
506: my $ipnew = inet_ntoa($ip);
507: $ip = $ipnew;
1.157 foxr 508: # Reconstruct the host line and append to adjusted:
509:
1.166 foxr 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";
1.157 foxr 515:
1.166 foxr 516: } else { # Not me, pass unmodified.
517: $adjusted .= $line."\n";
518: }
1.157 foxr 519: } else { # Blank or comment never re-written.
520: $adjusted .= $line."\n"; # Pass blanks and comments as is.
521: }
1.166 foxr 522: }
523: return $adjusted;
1.157 foxr 524: }
1.143 foxr 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 {
1.192 foxr 541:
542: my ($Filename, $Contents) = @_;
1.143 foxr 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: }
1.200 matthew 565:
566:
1.169 foxr 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;
1.143 foxr 590:
1.169 foxr 591: }
1.143 foxr 592: #
1.141 foxr 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:
1.169 foxr 621:
622: my $tablefile = ConfigFileFromSelector($filename);
623: if(! (defined $tablefile)) {
1.141 foxr 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/;
1.143 foxr 633: if(!CopyFile($tablefile, $backupfile)) {
634: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
635: return "error:$!";
636: }
1.141 foxr 637: &logthis('<font color="green"> Pushfile: backed up '
638: .$tablefile." to $backupfile</font>");
639:
1.157 foxr 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:
1.141 foxr 650: # Install the new file:
651:
1.143 foxr 652: if(!InstallFile($tablefile, $contents)) {
653: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 654: .$tablefile." $! </font>");
1.143 foxr 655: return "error:$!";
656: }
657: else {
658: &logthis('<font color="green"> Installed new '.$tablefile
659: ."</font>");
660:
661: }
662:
1.141 foxr 663:
664: # Indicate success:
665:
666: return "ok";
667:
668: }
1.145 foxr 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:
1.146 foxr 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);
1.147 foxr 694: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 695: if($process eq 'lonc') {
696: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 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);
1.146 foxr 705: } elsif ($process eq 'lond') {
1.147 foxr 706: logthis('<font color="red"> Reinitializing self (lond) </font>');
707: &UpdateHosts; # Lond is us!!
1.146 foxr 708: } else {
709: &logthis('<font color="yellow" Invalid reinit request for '.$process
710: ."</font>");
711: return "error:Invalid process identifier $process";
712: }
1.145 foxr 713: return 'ok';
714: }
1.168 foxr 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).
1.167 foxr 721: #
1.168 foxr 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: }
1.169 foxr 747: } elsif ($command eq "replace") {
1.168 foxr 748: #
749: # key and newline:
750: #
751: if (($key eq "") || ($newline eq "")) {
752: return 0;
753: } else {
754: return 1;
755: }
1.169 foxr 756: } elsif ($command eq "append") {
757: if (($key ne "") && ($newline eq "")) {
758: return 1;
759: } else {
760: return 0;
761: }
1.168 foxr 762: } else {
763: return 0; # Invalid command.
764: }
765: return 0; # Should not get here!!!
766: }
1.169 foxr 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 {
1.192 foxr 781:
782: my ($directive, $editor) = @_;
1.169 foxr 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 {
1.192 foxr 866:
867: my ($filename, $editor) = @_;
1.168 foxr 868:
1.169 foxr 869: CopyFile ($filename, $filename.".old");
870:
871: my $contents = $editor->Get(); # Get the contents of the file.
872:
873: InstallFile($filename, $contents);
874: }
1.168 foxr 875: #
876: #
877: # Called to edit a configuration table file
1.167 foxr 878: # Parameters:
879: # request - The entire command/request sent by lonc or lonManage
880: # Return:
881: # The reply to send to the client.
1.168 foxr 882: #
1.167 foxr 883: sub EditFile {
884: my $request = shift;
885:
886: # Split the command into it's pieces: edit:filetype:script
887:
1.168 foxr 888: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 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.
1.168 foxr 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: }
1.145 foxr 910:
1.167 foxr 911: # Execute the edit operation.
1.169 foxr 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);
1.167 foxr 920:
1.169 foxr 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);
1.167 foxr 933:
934: return "ok\n";
935: }
1.207 foxr 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: #
1.209 albertel 958: sub tie_domain_hash {
1.210 albertel 959: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 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)) {
1.211 albertel 972: if (defined($loghead)) { # Need to log the operation.
1.210 albertel 973: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
1.207 foxr 974: if($logFh) {
975: my $timestamp = time;
976: print $logFh "$loghead:$timestamp:$logtail\n";
977: }
1.210 albertel 978: $logFh->close;
1.207 foxr 979: }
980: return \%hash; # Return the tied hash.
1.210 albertel 981: } else {
1.207 foxr 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: #
1.210 albertel 1005: sub tie_user_hash {
1006: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 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)) {
1.209 albertel 1017: # If this is a namespace for which a history is kept,
1018: # make the history log entry:
1.211 albertel 1019: if (($namespace =~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 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: }
1.210 albertel 1027: $hfh->close;
1.209 albertel 1028: }
1.207 foxr 1029: return \%hash;
1.209 albertel 1030: } else {
1.207 foxr 1031: return undef;
1032: }
1033:
1034: }
1.214 foxr 1035:
1036: #--------------------- Request Handlers --------------------------------------------
1037: #
1.215 foxr 1038: # By convention each request handler registers itself prior to the sub
1039: # declaration:
1.214 foxr 1040: #
1041:
1.216 foxr 1042: #++
1043: #
1.214 foxr 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:
1.216 foxr 1068: #++
1.215 foxr 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:
1.216 foxr 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:
1.215 foxr 1140:
1.217 foxr 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:
1.218 foxr 1207: # Process a request for the authorization type of a user:
1208: # (userauth).
1209: #
1210: # Parameters:
1211: # $cmd - the actual keyword that invoked us.
1212: # $tail - the tail of the request that invoked us.
1213: # $replyfd- File descriptor connected to the client
1214: # Returns:
1215: # 1 - Ok to continue processing.
1216: # 0 - Program should exit
1217: # Implicit outputs:
1218: # The user authorization type is written to the client.
1219: #
1220: sub user_authorization_type {
1221: my ($cmd, $tail, $replyfd) = @_;
1222:
1223: my $userinput = "$cmd:$tail";
1224:
1225: # Pull the domain and username out of the command tail.
1226: # and call GetAuthType to determine the authentication type.
1227:
1228: my ($udom,$uname)=split(/:/,$tail);
1229: my $result = &GetAuthType($udom, $uname);
1230: if($result eq "nouser") {
1231: &Failure( $replyfd, "unknown_user\n", $userinput);
1232: } else {
1233: #
1234: # We only want to pass the second field from GetAuthType
1235: # for ^krb.. otherwise we'll be handing out the encrypted
1236: # password for internals e.g.
1237: #
1238: my ($type,$otherinfo) = split(/:/,$result);
1239: if($type =~ /^krb/) {
1240: $type = $result;
1241: }
1242: &Reply( $replyfd, "$type\n", $userinput);
1243: }
1244:
1245: return 1;
1246: }
1247: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1248:
1249: # Process a request by a manager to push a hosts or domain table
1250: # to us. We pick apart the command and pass it on to the subs
1251: # that already exist to do this.
1252: #
1253: # Parameters:
1254: # $cmd - the actual keyword that invoked us.
1255: # $tail - the tail of the request that invoked us.
1256: # $client - File descriptor connected to the client
1257: # Returns:
1258: # 1 - Ok to continue processing.
1259: # 0 - Program should exit
1260: # Implicit Output:
1261: # a reply is written to the client.
1262:
1263: sub push_file_handler {
1264: my ($cmd, $tail, $client) = @_;
1265:
1266: my $userinput = "$cmd:$tail";
1267:
1268: # At this time we only know that the IP of our partner is a valid manager
1269: # the code below is a hook to do further authentication (e.g. to resolve
1270: # spoofing).
1271:
1272: my $cert = &GetCertificate($userinput);
1273: if(&ValidManager($cert)) {
1274:
1275: # Now presumably we have the bona fides of both the peer host and the
1276: # process making the request.
1277:
1278: my $reply = &PushFile($userinput);
1279: &Reply($client, "$reply\n", $userinput);
1280:
1281: } else {
1282: &Failure( $client, "refused\n", $userinput);
1283: }
1.219 foxr 1284: return 1;
1.218 foxr 1285: }
1286: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1287:
1288:
1289:
1290: # Process a reinit request. Reinit requests that either
1291: # lonc or lond be reinitialized so that an updated
1292: # host.tab or domain.tab can be processed.
1293: #
1294: # Parameters:
1295: # $cmd - the actual keyword that invoked us.
1296: # $tail - the tail of the request that invoked us.
1297: # $client - File descriptor connected to the client
1298: # Returns:
1299: # 1 - Ok to continue processing.
1300: # 0 - Program should exit
1301: # Implicit output:
1302: # a reply is sent to the client.
1303: #
1304: sub reinit_process_handler {
1305: my ($cmd, $tail, $client) = @_;
1306:
1307: my $userinput = "$cmd:$tail";
1308:
1309: my $cert = &GetCertificate($userinput);
1310: if(&ValidManager($cert)) {
1311: chomp($userinput);
1312: my $reply = &ReinitProcess($userinput);
1313: &Reply( $client, "$reply\n", $userinput);
1314: } else {
1315: &Failure( $client, "refused\n", $userinput);
1316: }
1317: return 1;
1318: }
1319:
1320: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1321:
1322: # Process the editing script for a table edit operation.
1323: # the editing operation must be encrypted and requested by
1324: # a manager host.
1325: #
1326: # Parameters:
1327: # $cmd - the actual keyword that invoked us.
1328: # $tail - the tail of the request that invoked us.
1329: # $client - File descriptor connected to the client
1330: # Returns:
1331: # 1 - Ok to continue processing.
1332: # 0 - Program should exit
1333: # Implicit output:
1334: # a reply is sent to the client.
1335: #
1336: sub edit_table_handler {
1337: my ($command, $tail, $client) = @_;
1338:
1339: my $userinput = "$command:$tail";
1340:
1341: my $cert = &GetCertificate($userinput);
1342: if(&ValidManager($cert)) {
1343: my($filetype, $script) = split(/:/, $tail);
1344: if (($filetype eq "hosts") ||
1345: ($filetype eq "domain")) {
1346: if($script ne "") {
1347: &Reply($client, # BUGBUG - EditFile
1348: &EditFile($userinput), # could fail.
1349: $userinput);
1350: } else {
1351: &Failure($client,"refused\n",$userinput);
1352: }
1353: } else {
1354: &Failure($client,"refused\n",$userinput);
1355: }
1356: } else {
1357: &Failure($client,"refused\n",$userinput);
1358: }
1359: return 1;
1360: }
1361: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1362:
1363:
1.220 ! foxr 1364: #
! 1365: # Authenticate a user against the LonCAPA authentication
! 1366: # database. Note that there are several authentication
! 1367: # possibilities:
! 1368: # - unix - The user can be authenticated against the unix
! 1369: # password file.
! 1370: # - internal - The user can be authenticated against a purely
! 1371: # internal per user password file.
! 1372: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
! 1373: # ticket granting authority.
! 1374: # - user - The person tailoring LonCAPA can supply a user authentication
! 1375: # mechanism that is per system.
! 1376: #
! 1377: # Parameters:
! 1378: # $cmd - The command that got us here.
! 1379: # $tail - Tail of the command (remaining parameters).
! 1380: # $client - File descriptor connected to client.
! 1381: # Returns
! 1382: # 0 - Requested to exit, caller should shut down.
! 1383: # 1 - Continue processing.
! 1384: # Implicit inputs:
! 1385: # The authentication systems describe above have their own forms of implicit
! 1386: # input into the authentication process that are described above.
! 1387: #
! 1388: sub authenticate_handler {
! 1389: my ($cmd, $tail, $client) = @_;
! 1390:
! 1391:
! 1392: # Regenerate the full input line
! 1393:
! 1394: my $userinput = $cmd.":".$tail;
! 1395:
! 1396: # udom - User's domain.
! 1397: # uname - Username.
! 1398: # upass - User's password.
! 1399:
! 1400: my ($udom,$uname,$upass)=split(/:/,$tail);
! 1401: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
! 1402: chomp($upass);
! 1403: $upass=&unescape($upass);
! 1404:
! 1405: my $pwdcorrect = &validate_user($udom, $uname, $upass);
! 1406: if($pwdcorrect) {
! 1407: &Reply( $client, "authorized\n", $userinput);
! 1408: #
! 1409: # Bad credentials: Failed to authorize
! 1410: #
! 1411: } else {
! 1412: &Failure( $client, "non_authorized\n", $userinput);
! 1413: }
! 1414:
! 1415: return 1;
! 1416: }
1.218 foxr 1417:
1.220 ! foxr 1418: register_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1419:
1.207 foxr 1420: #---------------------------------------------------------------
1421: #
1422: # Getting, decoding and dispatching requests:
1423: #
1424:
1425: #
1426: # Get a Request:
1427: # Gets a Request message from the client. The transaction
1428: # is defined as a 'line' of text. We remove the new line
1429: # from the text line.
1430: #
1.211 albertel 1431: sub get_request {
1.207 foxr 1432: my $input = <$client>;
1433: chomp($input);
1434:
1.212 foxr 1435: Debug("get_request: Request = $input\n");
1.207 foxr 1436:
1437: &status('Processing '.$clientname.':'.$input);
1438:
1439: return $input;
1440: }
1.212 foxr 1441: #---------------------------------------------------------------
1442: #
1443: # Process a request. This sub should shrink as each action
1444: # gets farmed out into a separat sub that is registered
1445: # with the dispatch hash.
1446: #
1447: # Parameters:
1448: # user_input - The request received from the client (lonc).
1449: # Returns:
1450: # true to keep processing, false if caller should exit.
1451: #
1452: sub process_request {
1453: my ($userinput) = @_; # Easier for now to break style than to
1454: # fix all the userinput -> user_input.
1455: my $wasenc = 0; # True if request was encrypted.
1456: # ------------------------------------------------------------ See if encrypted
1457: if ($userinput =~ /^enc/) {
1458: $userinput = decipher($userinput);
1459: $wasenc=1;
1460: if(!$userinput) { # Cipher not defined.
1461: &Failure($client, "error: Encrypted data without negotated key");
1462: return 0;
1463: }
1464: }
1465: Debug("process_request: $userinput\n");
1466:
1.213 foxr 1467: #
1468: # The 'correct way' to add a command to lond is now to
1469: # write a sub to execute it and Add it to the command dispatch
1470: # hash via a call to register_handler.. The comments to that
1471: # sub should give you enough to go on to show how to do this
1472: # along with the examples that are building up as this code
1473: # is getting refactored. Until all branches of the
1474: # if/elseif monster below have been factored out into
1475: # separate procesor subs, if the dispatch hash is missing
1476: # the command keyword, we will fall through to the remainder
1477: # of the if/else chain below in order to keep this thing in
1478: # working order throughout the transmogrification.
1479:
1480: my ($command, $tail) = split(/:/, $userinput, 2);
1481: chomp($command);
1482: chomp($tail);
1483: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 1484: $command =~ s/(\r)//; # And this too for parameterless commands.
1485: if(!$tail) {
1486: $tail =""; # defined but blank.
1487: }
1.213 foxr 1488:
1489: &Debug("Command received: $command, encoded = $wasenc");
1490:
1491: if(defined $Dispatcher{$command}) {
1492:
1493: my $dispatch_info = $Dispatcher{$command};
1494: my $handler = $$dispatch_info[0];
1495: my $need_encode = $$dispatch_info[1];
1496: my $client_types = $$dispatch_info[2];
1497: Debug("Matched dispatch hash: mustencode: $need_encode "
1498: ."ClientType $client_types");
1499:
1500: # Validate the request:
1501:
1502: my $ok = 1;
1503: my $requesterprivs = 0;
1504: if(&isClient()) {
1505: $requesterprivs |= $CLIENT_OK;
1506: }
1507: if(&isManager()) {
1508: $requesterprivs |= $MANAGER_OK;
1509: }
1510: if($need_encode && (!$wasenc)) {
1511: Debug("Must encode but wasn't: $need_encode $wasenc");
1512: $ok = 0;
1513: }
1514: if(($client_types & $requesterprivs) == 0) {
1515: Debug("Client not privileged to do this operation");
1516: $ok = 0;
1517: }
1518:
1519: if($ok) {
1520: Debug("Dispatching to handler $command $tail");
1521: my $keep_going = &$handler($command, $tail, $client);
1522: return $keep_going;
1523: } else {
1524: Debug("Refusing to dispatch because client did not match requirements");
1525: Failure($client, "refused\n", $userinput);
1526: return 1;
1527: }
1528:
1529: }
1530:
1.215 foxr 1531: #------------------- Commands not yet in spearate handlers. --------------
1532:
1.218 foxr 1533:
1.212 foxr 1534: # ---------------------------------------------------------------------- passwd
1.220 ! foxr 1535: if ($userinput =~ /^passwd/) { # encoded and client
1.212 foxr 1536: if (($wasenc==1) && isClient) {
1537: my
1538: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1539: chomp($npass);
1540: $upass=&unescape($upass);
1541: $npass=&unescape($npass);
1542: &Debug("Trying to change password for $uname");
1543: my $proname=propath($udom,$uname);
1544: my $passfilename="$proname/passwd";
1545: if (-e $passfilename) {
1546: my $realpasswd;
1547: { my $pf = IO::File->new($passfilename);
1548: $realpasswd=<$pf>; }
1549: chomp($realpasswd);
1550: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1551: if ($howpwd eq 'internal') {
1552: &Debug("internal auth");
1553: if (crypt($upass,$contentpwd) eq $contentpwd) {
1554: my $salt=time;
1555: $salt=substr($salt,6,2);
1556: my $ncpass=crypt($npass,$salt);
1557: {
1558: my $pf;
1559: if ($pf = IO::File->new(">$passfilename")) {
1560: print $pf "internal:$ncpass\n";
1561: &logthis("Result of password change for $uname: pwchange_success");
1562: print $client "ok\n";
1563: } else {
1564: &logthis("Unable to open $uname passwd to change password");
1565: print $client "non_authorized\n";
1566: }
1567: }
1568:
1569: } else {
1570: print $client "non_authorized\n";
1571: }
1572: } elsif ($howpwd eq 'unix') {
1573: # Unix means we have to access /etc/password
1574: # one way or another.
1575: # First: Make sure the current password is
1576: # correct
1577: &Debug("auth is unix");
1578: $contentpwd=(getpwnam($uname))[1];
1579: my $pwdcorrect = "0";
1580: my $pwauth_path="/usr/local/sbin/pwauth";
1581: unless ($contentpwd eq 'x') {
1582: $pwdcorrect=
1583: (crypt($upass,$contentpwd) eq $contentpwd);
1584: } elsif (-e $pwauth_path) {
1585: open PWAUTH, "|$pwauth_path" or
1586: die "Cannot invoke authentication";
1587: print PWAUTH "$uname\n$upass\n";
1588: close PWAUTH;
1589: &Debug("exited pwauth with $? ($uname,$upass) ");
1590: $pwdcorrect=($? == 0);
1591: }
1592: if ($pwdcorrect) {
1593: my $execdir=$perlvar{'lonDaemons'};
1594: &Debug("Opening lcpasswd pipeline");
1595: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1596: print $pf "$uname\n$npass\n$npass\n";
1597: close $pf;
1598: my $err = $?;
1599: my $result = ($err>0 ? 'pwchange_failure'
1600: : 'ok');
1601: &logthis("Result of password change for $uname: ".
1602: &lcpasswdstrerror($?));
1603: print $client "$result\n";
1604: } else {
1605: print $client "non_authorized\n";
1606: }
1607: } else {
1608: print $client "auth_mode_error\n";
1609: }
1610: } else {
1611: print $client "unknown_user\n";
1612: }
1613: } else {
1614: Reply($client, "refused\n", $userinput);
1615:
1616: }
1617: # -------------------------------------------------------------------- makeuser
1618: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1619: &Debug("Make user received");
1620: my $oldumask=umask(0077);
1621: if (($wasenc==1) && isClient) {
1622: my
1623: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1624: &Debug("cmd =".$cmd." $udom =".$udom.
1625: " uname=".$uname);
1626: chomp($npass);
1627: $npass=&unescape($npass);
1628: my $proname=propath($udom,$uname);
1629: my $passfilename="$proname/passwd";
1630: &Debug("Password file created will be:".
1631: $passfilename);
1632: if (-e $passfilename) {
1633: print $client "already_exists\n";
1634: } elsif ($udom ne $currentdomainid) {
1635: print $client "not_right_domain\n";
1636: } else {
1637: my @fpparts=split(/\//,$proname);
1638: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1639: my $fperror='';
1640: for (my $i=3;$i<=$#fpparts;$i++) {
1641: $fpnow.='/'.$fpparts[$i];
1642: unless (-e $fpnow) {
1643: unless (mkdir($fpnow,0777)) {
1644: $fperror="error: ".($!+0)
1645: ." mkdir failed while attempting "
1646: ."makeuser";
1647: }
1648: }
1649: }
1650: unless ($fperror) {
1651: my $result=&make_passwd_file($uname, $umode,$npass,
1652: $passfilename);
1653: print $client $result;
1654: } else {
1655: print $client "$fperror\n";
1656: }
1657: }
1658: } else {
1659: Reply($client, "refused\n", $userinput);
1660:
1661: }
1662: umask($oldumask);
1663: # -------------------------------------------------------------- changeuserauth
1664: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1665: &Debug("Changing authorization");
1666: if (($wasenc==1) && isClient) {
1667: my
1668: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1669: chomp($npass);
1670: &Debug("cmd = ".$cmd." domain= ".$udom.
1671: "uname =".$uname." umode= ".$umode);
1672: $npass=&unescape($npass);
1673: my $proname=&propath($udom,$uname);
1674: my $passfilename="$proname/passwd";
1675: if ($udom ne $currentdomainid) {
1676: print $client "not_right_domain\n";
1677: } else {
1678: my $result=&make_passwd_file($uname, $umode,$npass,
1679: $passfilename);
1680: print $client $result;
1681: }
1682: } else {
1683: Reply($client, "refused\n", $userinput);
1684:
1685: }
1686: # ------------------------------------------------------------------------ home
1687: } elsif ($userinput =~ /^home/) { # client clear or encoded
1688: if(isClient) {
1689: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1690: chomp($uname);
1691: my $proname=propath($udom,$uname);
1692: if (-e $proname) {
1693: print $client "found\n";
1694: } else {
1695: print $client "not_found\n";
1696: }
1697: } else {
1698: Reply($client, "refused\n", $userinput);
1699:
1700: }
1701: # ---------------------------------------------------------------------- update
1702: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1703: if(isClient) {
1704: my ($cmd,$fname)=split(/:/,$userinput);
1705: my $ownership=ishome($fname);
1706: if ($ownership eq 'not_owner') {
1707: if (-e $fname) {
1708: my ($dev,$ino,$mode,$nlink,
1709: $uid,$gid,$rdev,$size,
1710: $atime,$mtime,$ctime,
1711: $blksize,$blocks)=stat($fname);
1712: my $now=time;
1713: my $since=$now-$atime;
1714: if ($since>$perlvar{'lonExpire'}) {
1715: my $reply=
1716: &reply("unsub:$fname","$clientname");
1717: unlink("$fname");
1718: } else {
1719: my $transname="$fname.in.transfer";
1720: my $remoteurl=
1721: &reply("sub:$fname","$clientname");
1722: my $response;
1723: {
1724: my $ua=new LWP::UserAgent;
1725: my $request=new HTTP::Request('GET',"$remoteurl");
1726: $response=$ua->request($request,$transname);
1727: }
1728: if ($response->is_error()) {
1729: unlink($transname);
1730: my $message=$response->status_line;
1731: &logthis(
1732: "LWP GET: $message for $fname ($remoteurl)");
1733: } else {
1734: if ($remoteurl!~/\.meta$/) {
1735: my $ua=new LWP::UserAgent;
1736: my $mrequest=
1737: new HTTP::Request('GET',$remoteurl.'.meta');
1738: my $mresponse=
1739: $ua->request($mrequest,$fname.'.meta');
1740: if ($mresponse->is_error()) {
1741: unlink($fname.'.meta');
1742: }
1743: }
1744: rename($transname,$fname);
1745: }
1746: }
1747: print $client "ok\n";
1748: } else {
1749: print $client "not_found\n";
1750: }
1751: } else {
1752: print $client "rejected\n";
1753: }
1754: } else {
1755: Reply($client, "refused\n", $userinput);
1756:
1757: }
1758: # -------------------------------------- fetch a user file from a remote server
1759: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1760: if(isClient) {
1761: my ($cmd,$fname)=split(/:/,$userinput);
1762: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1763: my $udir=propath($udom,$uname).'/userfiles';
1764: unless (-e $udir) { mkdir($udir,0770); }
1765: if (-e $udir) {
1766: $ufile=~s/^[\.\~]+//;
1767: my $path = $udir;
1768: if ($ufile =~m|(.+)/([^/]+)$|) {
1769: my @parts=split('/',$1);
1770: foreach my $part (@parts) {
1771: $path .= '/'.$part;
1772: if ((-e $path)!=1) {
1773: mkdir($path,0770);
1774: }
1775: }
1776: }
1777: my $destname=$udir.'/'.$ufile;
1778: my $transname=$udir.'/'.$ufile.'.in.transit';
1779: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1780: my $response;
1781: {
1782: my $ua=new LWP::UserAgent;
1783: my $request=new HTTP::Request('GET',"$remoteurl");
1784: $response=$ua->request($request,$transname);
1785: }
1786: if ($response->is_error()) {
1787: unlink($transname);
1788: my $message=$response->status_line;
1789: &logthis("LWP GET: $message for $fname ($remoteurl)");
1790: print $client "failed\n";
1791: } else {
1792: if (!rename($transname,$destname)) {
1793: &logthis("Unable to move $transname to $destname");
1794: unlink($transname);
1795: print $client "failed\n";
1796: } else {
1797: print $client "ok\n";
1798: }
1799: }
1800: } else {
1801: print $client "not_home\n";
1802: }
1803: } else {
1804: Reply($client, "refused\n", $userinput);
1805: }
1806: # --------------------------------------------------------- remove a user file
1807: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
1808: if(isClient) {
1809: my ($cmd,$fname)=split(/:/,$userinput);
1810: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1811: &logthis("$udom - $uname - $ufile");
1812: if ($ufile =~m|/\.\./|) {
1813: # any files paths with /../ in them refuse
1814: # to deal with
1815: print $client "refused\n";
1816: } else {
1817: my $udir=propath($udom,$uname);
1818: if (-e $udir) {
1819: my $file=$udir.'/userfiles/'.$ufile;
1820: if (-e $file) {
1821: unlink($file);
1822: if (-e $file) {
1823: print $client "failed\n";
1824: } else {
1825: print $client "ok\n";
1826: }
1827: } else {
1828: print $client "not_found\n";
1829: }
1830: } else {
1831: print $client "not_home\n";
1832: }
1833: }
1834: } else {
1835: Reply($client, "refused\n", $userinput);
1836: }
1837: # ------------------------------------------ authenticate access to a user file
1838: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1839: if(isClient) {
1840: my ($cmd,$fname,$session)=split(/:/,$userinput);
1841: chomp($session);
1842: my $reply='non_auth';
1843: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1844: $session.'.id')) {
1845: while (my $line=<ENVIN>) {
1846: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1847: }
1848: close(ENVIN);
1849: print $client $reply."\n";
1850: } else {
1851: print $client "invalid_token\n";
1852: }
1853: } else {
1854: Reply($client, "refused\n", $userinput);
1855:
1856: }
1857: # ----------------------------------------------------------------- unsubscribe
1858: } elsif ($userinput =~ /^unsub/) {
1859: if(isClient) {
1860: my ($cmd,$fname)=split(/:/,$userinput);
1861: if (-e $fname) {
1862: print $client &unsub($fname,$clientip);
1863: } else {
1864: print $client "not_found\n";
1865: }
1866: } else {
1867: Reply($client, "refused\n", $userinput);
1868:
1869: }
1870: # ------------------------------------------------------------------- subscribe
1871: } elsif ($userinput =~ /^sub/) {
1872: if(isClient) {
1873: print $client &subscribe($userinput,$clientip);
1874: } else {
1875: Reply($client, "refused\n", $userinput);
1876:
1877: }
1878: # ------------------------------------------------------------- current version
1879: } elsif ($userinput =~ /^currentversion/) {
1880: if(isClient) {
1881: my ($cmd,$fname)=split(/:/,$userinput);
1882: print $client ¤tversion($fname)."\n";
1883: } else {
1884: Reply($client, "refused\n", $userinput);
1885:
1886: }
1887: # ------------------------------------------------------------------------- log
1888: } elsif ($userinput =~ /^log/) {
1889: if(isClient) {
1890: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1891: chomp($what);
1892: my $proname=propath($udom,$uname);
1893: my $now=time;
1894: {
1895: my $hfh;
1896: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1897: print $hfh "$now:$clientname:$what\n";
1898: print $client "ok\n";
1899: } else {
1900: print $client "error: ".($!+0)
1901: ." IO::File->new Failed "
1902: ."while attempting log\n";
1903: }
1904: }
1905: } else {
1906: Reply($client, "refused\n", $userinput);
1907:
1908: }
1909: # ------------------------------------------------------------------------- put
1910: } elsif ($userinput =~ /^put/) {
1911: if(isClient) {
1912: my ($cmd,$udom,$uname,$namespace,$what)
1913: =split(/:/,$userinput,5);
1914: $namespace=~s/\//\_/g;
1915: $namespace=~s/\W//g;
1916: if ($namespace ne 'roles') {
1917: chomp($what);
1918: my $proname=propath($udom,$uname);
1919: my $now=time;
1920: my @pairs=split(/\&/,$what);
1921: my %hash;
1922: if (tie(%hash,'GDBM_File',
1923: "$proname/$namespace.db",
1924: &GDBM_WRCREAT(),0640)) {
1925: unless ($namespace=~/^nohist\_/) {
1926: my $hfh;
1927: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1928: }
1929:
1930: foreach my $pair (@pairs) {
1931: my ($key,$value)=split(/=/,$pair);
1932: $hash{$key}=$value;
1933: }
1934: if (untie(%hash)) {
1935: print $client "ok\n";
1936: } else {
1937: print $client "error: ".($!+0)
1938: ." untie(GDBM) failed ".
1939: "while attempting put\n";
1940: }
1941: } else {
1942: print $client "error: ".($!)
1943: ." tie(GDBM) Failed ".
1944: "while attempting put\n";
1945: }
1946: } else {
1947: print $client "refused\n";
1948: }
1949: } else {
1950: Reply($client, "refused\n", $userinput);
1951:
1952: }
1953: # ------------------------------------------------------------------- inc
1954: } elsif ($userinput =~ /^inc:/) {
1955: if(isClient) {
1956: my ($cmd,$udom,$uname,$namespace,$what)
1957: =split(/:/,$userinput);
1958: $namespace=~s/\//\_/g;
1959: $namespace=~s/\W//g;
1960: if ($namespace ne 'roles') {
1961: chomp($what);
1962: my $proname=propath($udom,$uname);
1963: my $now=time;
1964: my @pairs=split(/\&/,$what);
1965: my %hash;
1966: if (tie(%hash,'GDBM_File',
1967: "$proname/$namespace.db",
1968: &GDBM_WRCREAT(),0640)) {
1969: unless ($namespace=~/^nohist\_/) {
1970: my $hfh;
1971: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1972: }
1973: foreach my $pair (@pairs) {
1974: my ($key,$value)=split(/=/,$pair);
1975: # We could check that we have a number...
1976: if (! defined($value) || $value eq '') {
1977: $value = 1;
1978: }
1979: $hash{$key}+=$value;
1980: }
1981: if (untie(%hash)) {
1982: print $client "ok\n";
1983: } else {
1984: print $client "error: ".($!+0)
1985: ." untie(GDBM) failed ".
1986: "while attempting inc\n";
1987: }
1988: } else {
1989: print $client "error: ".($!)
1990: ." tie(GDBM) Failed ".
1991: "while attempting inc\n";
1992: }
1993: } else {
1994: print $client "refused\n";
1995: }
1996: } else {
1997: Reply($client, "refused\n", $userinput);
1998:
1999: }
2000: # -------------------------------------------------------------------- rolesput
2001: } elsif ($userinput =~ /^rolesput/) {
2002: if(isClient) {
2003: &Debug("rolesput");
2004: if ($wasenc==1) {
2005: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2006: =split(/:/,$userinput);
2007: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2008: "user = ".$exeuser." udom=".$udom.
2009: "what = ".$what);
2010: my $namespace='roles';
2011: chomp($what);
2012: my $proname=propath($udom,$uname);
2013: my $now=time;
2014: my @pairs=split(/\&/,$what);
2015: my %hash;
2016: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2017: {
2018: my $hfh;
2019: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2020: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2021: }
2022: }
2023:
2024: foreach my $pair (@pairs) {
2025: my ($key,$value)=split(/=/,$pair);
2026: &ManagePermissions($key, $udom, $uname,
2027: &GetAuthType( $udom,
2028: $uname));
2029: $hash{$key}=$value;
2030: }
2031: if (untie(%hash)) {
2032: print $client "ok\n";
2033: } else {
2034: print $client "error: ".($!+0)
2035: ." untie(GDBM) Failed ".
2036: "while attempting rolesput\n";
2037: }
2038: } else {
2039: print $client "error: ".($!+0)
2040: ." tie(GDBM) Failed ".
2041: "while attempting rolesput\n";
2042: }
2043: } else {
2044: print $client "refused\n";
2045: }
2046: } else {
2047: Reply($client, "refused\n", $userinput);
2048:
2049: }
2050: # -------------------------------------------------------------------- rolesdel
2051: } elsif ($userinput =~ /^rolesdel/) {
2052: if(isClient) {
2053: &Debug("rolesdel");
2054: if ($wasenc==1) {
2055: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2056: =split(/:/,$userinput);
2057: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2058: "user = ".$exeuser." udom=".$udom.
2059: "what = ".$what);
2060: my $namespace='roles';
2061: chomp($what);
2062: my $proname=propath($udom,$uname);
2063: my $now=time;
2064: my @rolekeys=split(/\&/,$what);
2065: my %hash;
2066: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2067: {
2068: my $hfh;
2069: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2070: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2071: }
2072: }
2073: foreach my $key (@rolekeys) {
2074: delete $hash{$key};
2075: }
2076: if (untie(%hash)) {
2077: print $client "ok\n";
2078: } else {
2079: print $client "error: ".($!+0)
2080: ." untie(GDBM) Failed ".
2081: "while attempting rolesdel\n";
2082: }
2083: } else {
2084: print $client "error: ".($!+0)
2085: ." tie(GDBM) Failed ".
2086: "while attempting rolesdel\n";
2087: }
2088: } else {
2089: print $client "refused\n";
2090: }
2091: } else {
2092: Reply($client, "refused\n", $userinput);
2093:
2094: }
2095: # ------------------------------------------------------------------------- get
2096: } elsif ($userinput =~ /^get/) {
2097: if(isClient) {
2098: my ($cmd,$udom,$uname,$namespace,$what)
2099: =split(/:/,$userinput);
2100: $namespace=~s/\//\_/g;
2101: $namespace=~s/\W//g;
2102: chomp($what);
2103: my @queries=split(/\&/,$what);
2104: my $proname=propath($udom,$uname);
2105: my $qresult='';
2106: my %hash;
2107: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2108: for (my $i=0;$i<=$#queries;$i++) {
2109: $qresult.="$hash{$queries[$i]}&";
2110: }
2111: if (untie(%hash)) {
2112: $qresult=~s/\&$//;
2113: print $client "$qresult\n";
2114: } else {
2115: print $client "error: ".($!+0)
2116: ." untie(GDBM) Failed ".
2117: "while attempting get\n";
2118: }
2119: } else {
2120: if ($!+0 == 2) {
2121: print $client "error:No such file or ".
2122: "GDBM reported bad block error\n";
2123: } else {
2124: print $client "error: ".($!+0)
2125: ." tie(GDBM) Failed ".
2126: "while attempting get\n";
2127: }
2128: }
2129: } else {
2130: Reply($client, "refused\n", $userinput);
2131:
2132: }
2133: # ------------------------------------------------------------------------ eget
2134: } elsif ($userinput =~ /^eget/) {
2135: if (isClient) {
2136: my ($cmd,$udom,$uname,$namespace,$what)
2137: =split(/:/,$userinput);
2138: $namespace=~s/\//\_/g;
2139: $namespace=~s/\W//g;
2140: chomp($what);
2141: my @queries=split(/\&/,$what);
2142: my $proname=propath($udom,$uname);
2143: my $qresult='';
2144: my %hash;
2145: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2146: for (my $i=0;$i<=$#queries;$i++) {
2147: $qresult.="$hash{$queries[$i]}&";
2148: }
2149: if (untie(%hash)) {
2150: $qresult=~s/\&$//;
2151: if ($cipher) {
2152: my $cmdlength=length($qresult);
2153: $qresult.=" ";
2154: my $encqresult='';
2155: for
2156: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2157: $encqresult.=
2158: unpack("H16",
2159: $cipher->encrypt(substr($qresult,$encidx,8)));
2160: }
2161: print $client "enc:$cmdlength:$encqresult\n";
2162: } else {
2163: print $client "error:no_key\n";
2164: }
2165: } else {
2166: print $client "error: ".($!+0)
2167: ." untie(GDBM) Failed ".
2168: "while attempting eget\n";
2169: }
2170: } else {
2171: print $client "error: ".($!+0)
2172: ." tie(GDBM) Failed ".
2173: "while attempting eget\n";
2174: }
2175: } else {
2176: Reply($client, "refused\n", $userinput);
2177:
2178: }
2179: # ------------------------------------------------------------------------- del
2180: } elsif ($userinput =~ /^del/) {
2181: if(isClient) {
2182: my ($cmd,$udom,$uname,$namespace,$what)
2183: =split(/:/,$userinput);
2184: $namespace=~s/\//\_/g;
2185: $namespace=~s/\W//g;
2186: chomp($what);
2187: my $proname=propath($udom,$uname);
2188: my $now=time;
2189: my @keys=split(/\&/,$what);
2190: my %hash;
2191: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2192: unless ($namespace=~/^nohist\_/) {
2193: my $hfh;
2194: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }
2195: }
2196: foreach my $key (@keys) {
2197: delete($hash{$key});
2198: }
2199: if (untie(%hash)) {
2200: print $client "ok\n";
2201: } else {
2202: print $client "error: ".($!+0)
2203: ." untie(GDBM) Failed ".
2204: "while attempting del\n";
2205: }
2206: } else {
2207: print $client "error: ".($!+0)
2208: ." tie(GDBM) Failed ".
2209: "while attempting del\n";
2210: }
2211: } else {
2212: Reply($client, "refused\n", $userinput);
2213:
2214: }
2215: # ------------------------------------------------------------------------ keys
2216: } elsif ($userinput =~ /^keys/) {
2217: if(isClient) {
2218: my ($cmd,$udom,$uname,$namespace)
2219: =split(/:/,$userinput);
2220: $namespace=~s/\//\_/g;
2221: $namespace=~s/\W//g;
2222: my $proname=propath($udom,$uname);
2223: my $qresult='';
2224: my %hash;
2225: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2226: foreach my $key (keys %hash) {
2227: $qresult.="$key&";
2228: }
2229: if (untie(%hash)) {
2230: $qresult=~s/\&$//;
2231: print $client "$qresult\n";
2232: } else {
2233: print $client "error: ".($!+0)
2234: ." untie(GDBM) Failed ".
2235: "while attempting keys\n";
2236: }
2237: } else {
2238: print $client "error: ".($!+0)
2239: ." tie(GDBM) Failed ".
2240: "while attempting keys\n";
2241: }
2242: } else {
2243: Reply($client, "refused\n", $userinput);
2244:
2245: }
2246: # ----------------------------------------------------------------- dumpcurrent
2247: } elsif ($userinput =~ /^currentdump/) {
2248: if (isClient) {
2249: my ($cmd,$udom,$uname,$namespace)
2250: =split(/:/,$userinput);
2251: $namespace=~s/\//\_/g;
2252: $namespace=~s/\W//g;
2253: my $qresult='';
2254: my $proname=propath($udom,$uname);
2255: my %hash;
2256: if (tie(%hash,'GDBM_File',
2257: "$proname/$namespace.db",
2258: &GDBM_READER(),0640)) {
2259: # Structure of %data:
2260: # $data{$symb}->{$parameter}=$value;
2261: # $data{$symb}->{'v.'.$parameter}=$version;
2262: # since $parameter will be unescaped, we do not
2263: # have to worry about silly parameter names...
2264: my %data = ();
2265: while (my ($key,$value) = each(%hash)) {
2266: my ($v,$symb,$param) = split(/:/,$key);
2267: next if ($v eq 'version' || $symb eq 'keys');
2268: next if (exists($data{$symb}) &&
2269: exists($data{$symb}->{$param}) &&
2270: $data{$symb}->{'v.'.$param} > $v);
2271: $data{$symb}->{$param}=$value;
2272: $data{$symb}->{'v.'.$param}=$v;
2273: }
2274: if (untie(%hash)) {
2275: while (my ($symb,$param_hash) = each(%data)) {
2276: while(my ($param,$value) = each (%$param_hash)){
2277: next if ($param =~ /^v\./);
2278: $qresult.=$symb.':'.$param.'='.$value.'&';
2279: }
2280: }
2281: chop($qresult);
2282: print $client "$qresult\n";
2283: } else {
2284: print $client "error: ".($!+0)
2285: ." untie(GDBM) Failed ".
2286: "while attempting currentdump\n";
2287: }
2288: } else {
2289: print $client "error: ".($!+0)
2290: ." tie(GDBM) Failed ".
2291: "while attempting currentdump\n";
2292: }
2293: } else {
2294: Reply($client, "refused\n", $userinput);
2295: }
2296: # ------------------------------------------------------------------------ dump
2297: } elsif ($userinput =~ /^dump/) {
2298: if(isClient) {
2299: my ($cmd,$udom,$uname,$namespace,$regexp)
2300: =split(/:/,$userinput);
2301: $namespace=~s/\//\_/g;
2302: $namespace=~s/\W//g;
2303: if (defined($regexp)) {
2304: $regexp=&unescape($regexp);
2305: } else {
2306: $regexp='.';
2307: }
2308: my $qresult='';
2309: my $proname=propath($udom,$uname);
2310: my %hash;
2311: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2312: while (my ($key,$value) = each(%hash)) {
2313: if ($regexp eq '.') {
2314: $qresult.=$key.'='.$value.'&';
2315: } else {
2316: my $unescapeKey = &unescape($key);
2317: if (eval('$unescapeKey=~/$regexp/')) {
2318: $qresult.="$key=$value&";
2319: }
2320: }
2321: }
2322: if (untie(%hash)) {
2323: chop($qresult);
2324: print $client "$qresult\n";
2325: } else {
2326: print $client "error: ".($!+0)
2327: ." untie(GDBM) Failed ".
2328: "while attempting dump\n";
2329: }
2330: } else {
2331: print $client "error: ".($!+0)
2332: ." tie(GDBM) Failed ".
2333: "while attempting dump\n";
2334: }
2335: } else {
2336: Reply($client, "refused\n", $userinput);
2337:
2338: }
2339: # ----------------------------------------------------------------------- store
2340: } elsif ($userinput =~ /^store/) {
2341: if(isClient) {
2342: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2343: =split(/:/,$userinput);
2344: $namespace=~s/\//\_/g;
2345: $namespace=~s/\W//g;
2346: if ($namespace ne 'roles') {
2347: chomp($what);
2348: my $proname=propath($udom,$uname);
2349: my $now=time;
2350: my @pairs=split(/\&/,$what);
2351: my %hash;
2352: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2353: unless ($namespace=~/^nohist\_/) {
2354: my $hfh;
2355: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2356: print $hfh "P:$now:$rid:$what\n";
2357: }
2358: }
2359: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2360: my $key;
2361: $hash{"version:$rid"}++;
2362: my $version=$hash{"version:$rid"};
2363: my $allkeys='';
2364: foreach my $pair (@pairs) {
2365: my ($key,$value)=split(/=/,$pair);
2366: $allkeys.=$key.':';
2367: $hash{"$version:$rid:$key"}=$value;
2368: }
2369: $hash{"$version:$rid:timestamp"}=$now;
2370: $allkeys.='timestamp';
2371: $hash{"$version:keys:$rid"}=$allkeys;
2372: if (untie(%hash)) {
2373: print $client "ok\n";
2374: } else {
2375: print $client "error: ".($!+0)
2376: ." untie(GDBM) Failed ".
2377: "while attempting store\n";
2378: }
2379: } else {
2380: print $client "error: ".($!+0)
2381: ." tie(GDBM) Failed ".
2382: "while attempting store\n";
2383: }
2384: } else {
2385: print $client "refused\n";
2386: }
2387: } else {
2388: Reply($client, "refused\n", $userinput);
2389:
2390: }
2391: # --------------------------------------------------------------------- restore
2392: } elsif ($userinput =~ /^restore/) {
2393: if(isClient) {
2394: my ($cmd,$udom,$uname,$namespace,$rid)
2395: =split(/:/,$userinput);
2396: $namespace=~s/\//\_/g;
2397: $namespace=~s/\W//g;
2398: chomp($rid);
2399: my $proname=propath($udom,$uname);
2400: my $qresult='';
2401: my %hash;
2402: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2403: my $version=$hash{"version:$rid"};
2404: $qresult.="version=$version&";
2405: my $scope;
2406: for ($scope=1;$scope<=$version;$scope++) {
2407: my $vkeys=$hash{"$scope:keys:$rid"};
2408: my @keys=split(/:/,$vkeys);
2409: my $key;
2410: $qresult.="$scope:keys=$vkeys&";
2411: foreach $key (@keys) {
2412: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2413: }
2414: }
2415: if (untie(%hash)) {
2416: $qresult=~s/\&$//;
2417: print $client "$qresult\n";
2418: } else {
2419: print $client "error: ".($!+0)
2420: ." untie(GDBM) Failed ".
2421: "while attempting restore\n";
2422: }
2423: } else {
2424: print $client "error: ".($!+0)
2425: ." tie(GDBM) Failed ".
2426: "while attempting restore\n";
2427: }
2428: } else {
2429: Reply($client, "refused\n", $userinput);
2430:
2431: }
2432: # -------------------------------------------------------------------- chatsend
2433: } elsif ($userinput =~ /^chatsend/) {
2434: if(isClient) {
2435: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2436: &chatadd($cdom,$cnum,$newpost);
2437: print $client "ok\n";
2438: } else {
2439: Reply($client, "refused\n", $userinput);
2440:
2441: }
2442: # -------------------------------------------------------------------- chatretr
2443: } elsif ($userinput =~ /^chatretr/) {
2444: if(isClient) {
2445: my
2446: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2447: my $reply='';
2448: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2449: $reply.=&escape($_).':';
2450: }
2451: $reply=~s/\:$//;
2452: print $client $reply."\n";
2453: } else {
2454: Reply($client, "refused\n", $userinput);
2455:
2456: }
2457: # ------------------------------------------------------------------- querysend
2458: } elsif ($userinput =~ /^querysend/) {
2459: if (isClient) {
2460: my ($cmd,$query,
2461: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2462: $query=~s/\n*$//g;
2463: print $client "".
2464: sqlreply("$clientname\&$query".
2465: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2466: } else {
2467: Reply($client, "refused\n", $userinput);
2468:
2469: }
2470: # ------------------------------------------------------------------ queryreply
2471: } elsif ($userinput =~ /^queryreply/) {
2472: if(isClient) {
2473: my ($cmd,$id,$reply)=split(/:/,$userinput);
2474: my $store;
2475: my $execdir=$perlvar{'lonDaemons'};
2476: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2477: $reply=~s/\&/\n/g;
2478: print $store $reply;
2479: close $store;
2480: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2481: print $store2 "done\n";
2482: close $store2;
2483: print $client "ok\n";
2484: }
2485: else {
2486: print $client "error: ".($!+0)
2487: ." IO::File->new Failed ".
2488: "while attempting queryreply\n";
2489: }
2490: } else {
2491: Reply($client, "refused\n", $userinput);
2492:
2493: }
2494: # ----------------------------------------------------------------- courseidput
2495: } elsif ($userinput =~ /^courseidput/) {
2496: if(isClient) {
2497: my ($cmd,$udom,$what)=split(/:/,$userinput);
2498: chomp($what);
2499: $udom=~s/\W//g;
2500: my $proname=
2501: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2502: my $now=time;
2503: my @pairs=split(/\&/,$what);
2504: my %hash;
2505: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2506: foreach my $pair (@pairs) {
2507: my ($key,$descr,$inst_code)=split(/=/,$pair);
2508: $hash{$key}=$descr.':'.$inst_code.':'.$now;
2509: }
2510: if (untie(%hash)) {
2511: print $client "ok\n";
2512: } else {
2513: print $client "error: ".($!+0)
2514: ." untie(GDBM) Failed ".
2515: "while attempting courseidput\n";
2516: }
2517: } else {
2518: print $client "error: ".($!+0)
2519: ." tie(GDBM) Failed ".
2520: "while attempting courseidput\n";
2521: }
2522: } else {
2523: Reply($client, "refused\n", $userinput);
2524:
2525: }
2526: # ---------------------------------------------------------------- courseiddump
2527: } elsif ($userinput =~ /^courseiddump/) {
2528: if(isClient) {
2529: my ($cmd,$udom,$since,$description)
2530: =split(/:/,$userinput);
2531: if (defined($description)) {
2532: $description=&unescape($description);
2533: } else {
2534: $description='.';
2535: }
2536: unless (defined($since)) { $since=0; }
2537: my $qresult='';
2538: my $proname=
2539: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2540: my %hash;
2541: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2542: while (my ($key,$value) = each(%hash)) {
2543: my ($descr,$lasttime,$inst_code);
2544: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
2545: ($descr,$inst_code,$lasttime)=($1,$2,$3);
2546: } else {
2547: ($descr,$lasttime) = split(/\:/,$value);
2548: }
2549: if ($lasttime<$since) { next; }
2550: if ($description eq '.') {
2551: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2552: } else {
2553: my $unescapeVal = &unescape($descr);
2554: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2555: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2556: }
2557: }
2558: }
2559: if (untie(%hash)) {
2560: chop($qresult);
2561: print $client "$qresult\n";
2562: } else {
2563: print $client "error: ".($!+0)
2564: ." untie(GDBM) Failed ".
2565: "while attempting courseiddump\n";
2566: }
2567: } else {
2568: print $client "error: ".($!+0)
2569: ." tie(GDBM) Failed ".
2570: "while attempting courseiddump\n";
2571: }
2572: } else {
2573: Reply($client, "refused\n", $userinput);
2574:
2575: }
2576: # ----------------------------------------------------------------------- idput
2577: } elsif ($userinput =~ /^idput/) {
2578: if(isClient) {
2579: my ($cmd,$udom,$what)=split(/:/,$userinput);
2580: chomp($what);
2581: $udom=~s/\W//g;
2582: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2583: my $now=time;
2584: my @pairs=split(/\&/,$what);
2585: my %hash;
2586: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2587: {
2588: my $hfh;
2589: if ($hfh=IO::File->new(">>$proname.hist")) {
2590: print $hfh "P:$now:$what\n";
2591: }
2592: }
2593: foreach my $pair (@pairs) {
2594: my ($key,$value)=split(/=/,$pair);
2595: $hash{$key}=$value;
2596: }
2597: if (untie(%hash)) {
2598: print $client "ok\n";
2599: } else {
2600: print $client "error: ".($!+0)
2601: ." untie(GDBM) Failed ".
2602: "while attempting idput\n";
2603: }
2604: } else {
2605: print $client "error: ".($!+0)
2606: ." tie(GDBM) Failed ".
2607: "while attempting idput\n";
2608: }
2609: } else {
2610: Reply($client, "refused\n", $userinput);
2611:
2612: }
2613: # ----------------------------------------------------------------------- idget
2614: } elsif ($userinput =~ /^idget/) {
2615: if(isClient) {
2616: my ($cmd,$udom,$what)=split(/:/,$userinput);
2617: chomp($what);
2618: $udom=~s/\W//g;
2619: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2620: my @queries=split(/\&/,$what);
2621: my $qresult='';
2622: my %hash;
2623: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2624: for (my $i=0;$i<=$#queries;$i++) {
2625: $qresult.="$hash{$queries[$i]}&";
2626: }
2627: if (untie(%hash)) {
2628: $qresult=~s/\&$//;
2629: print $client "$qresult\n";
2630: } else {
2631: print $client "error: ".($!+0)
2632: ." untie(GDBM) Failed ".
2633: "while attempting idget\n";
2634: }
2635: } else {
2636: print $client "error: ".($!+0)
2637: ." tie(GDBM) Failed ".
2638: "while attempting idget\n";
2639: }
2640: } else {
2641: Reply($client, "refused\n", $userinput);
2642:
2643: }
2644: # ---------------------------------------------------------------------- tmpput
2645: } elsif ($userinput =~ /^tmpput/) {
2646: if(isClient) {
2647: my ($cmd,$what)=split(/:/,$userinput);
2648: my $store;
2649: $tmpsnum++;
2650: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2651: $id=~s/\W/\_/g;
2652: $what=~s/\n//g;
2653: my $execdir=$perlvar{'lonDaemons'};
2654: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2655: print $store $what;
2656: close $store;
2657: print $client "$id\n";
2658: }
2659: else {
2660: print $client "error: ".($!+0)
2661: ."IO::File->new Failed ".
2662: "while attempting tmpput\n";
2663: }
2664: } else {
2665: Reply($client, "refused\n", $userinput);
2666:
2667: }
2668:
2669: # ---------------------------------------------------------------------- tmpget
2670: } elsif ($userinput =~ /^tmpget/) {
2671: if(isClient) {
2672: my ($cmd,$id)=split(/:/,$userinput);
2673: chomp($id);
2674: $id=~s/\W/\_/g;
2675: my $store;
2676: my $execdir=$perlvar{'lonDaemons'};
2677: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2678: my $reply=<$store>;
2679: print $client "$reply\n";
2680: close $store;
2681: }
2682: else {
2683: print $client "error: ".($!+0)
2684: ."IO::File->new Failed ".
2685: "while attempting tmpget\n";
2686: }
2687: } else {
2688: Reply($client, "refused\n", $userinput);
2689:
2690: }
2691: # ---------------------------------------------------------------------- tmpdel
2692: } elsif ($userinput =~ /^tmpdel/) {
2693: if(isClient) {
2694: my ($cmd,$id)=split(/:/,$userinput);
2695: chomp($id);
2696: $id=~s/\W/\_/g;
2697: my $execdir=$perlvar{'lonDaemons'};
2698: if (unlink("$execdir/tmp/$id.tmp")) {
2699: print $client "ok\n";
2700: } else {
2701: print $client "error: ".($!+0)
2702: ."Unlink tmp Failed ".
2703: "while attempting tmpdel\n";
2704: }
2705: } else {
2706: Reply($client, "refused\n", $userinput);
2707:
2708: }
2709: # ----------------------------------------- portfolio directory list (portls)
2710: } elsif ($userinput =~ /^portls/) {
2711: if(isClient) {
2712: my ($cmd,$uname,$udom)=split(/:/,$userinput);
2713: my $udir=propath($udom,$uname).'/userfiles/portfolio';
2714: my $dirLine='';
2715: my $dirContents='';
2716: if (opendir(LSDIR,$udir.'/')){
2717: while ($dirLine = readdir(LSDIR)){
2718: $dirContents = $dirContents.$dirLine.'<br />';
2719: }
2720: } else {
2721: $dirContents = "No directory found\n";
2722: }
2723: print $client $dirContents."\n";
2724: } else {
2725: Reply($client, "refused\n", $userinput);
2726: }
2727: # -------------------------------------------------------------------------- ls
2728: } elsif ($userinput =~ /^ls/) {
2729: if(isClient) {
2730: my $obs;
2731: my $rights;
2732: my ($cmd,$ulsdir)=split(/:/,$userinput);
2733: my $ulsout='';
2734: my $ulsfn;
2735: if (-e $ulsdir) {
2736: if(-d $ulsdir) {
2737: if (opendir(LSDIR,$ulsdir)) {
2738: while ($ulsfn=readdir(LSDIR)) {
2739: undef $obs, $rights;
2740: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2741: #We do some obsolete checking here
2742: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2743: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2744: my @obsolete=<FILE>;
2745: foreach my $obsolete (@obsolete) {
2746: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2747: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2748: }
2749: }
2750: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2751: if($obs eq '1') { $ulsout.="&1"; }
2752: else { $ulsout.="&0"; }
2753: if($rights eq '1') { $ulsout.="&1:"; }
2754: else { $ulsout.="&0:"; }
2755: }
2756: closedir(LSDIR);
2757: }
2758: } else {
2759: my @ulsstats=stat($ulsdir);
2760: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2761: }
2762: } else {
2763: $ulsout='no_such_dir';
2764: }
2765: if ($ulsout eq '') { $ulsout='empty'; }
2766: print $client "$ulsout\n";
2767: } else {
2768: Reply($client, "refused\n", $userinput);
2769:
2770: }
2771: # ----------------------------------------------------------------- setannounce
2772: } elsif ($userinput =~ /^setannounce/) {
2773: if (isClient) {
2774: my ($cmd,$announcement)=split(/:/,$userinput);
2775: chomp($announcement);
2776: $announcement=&unescape($announcement);
2777: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2778: '/announcement.txt')) {
2779: print $store $announcement;
2780: close $store;
2781: print $client "ok\n";
2782: } else {
2783: print $client "error: ".($!+0)."\n";
2784: }
2785: } else {
2786: Reply($client, "refused\n", $userinput);
2787:
2788: }
2789: # ------------------------------------------------------------------ Hanging up
2790: } elsif (($userinput =~ /^exit/) ||
2791: ($userinput =~ /^init/)) { # no restrictions.
2792: &logthis(
2793: "Client $clientip ($clientname) hanging up: $userinput");
2794: print $client "bye\n";
2795: $client->shutdown(2); # shutdown the socket forcibly.
2796: $client->close();
2797: return 0;
2798:
2799: # ---------------------------------- set current host/domain
2800: } elsif ($userinput =~ /^sethost:/) {
2801: if (isClient) {
2802: print $client &sethost($userinput)."\n";
2803: } else {
2804: print $client "refused\n";
2805: }
2806: #---------------------------------- request file (?) version.
2807: } elsif ($userinput =~/^version:/) {
2808: if (isClient) {
2809: print $client &version($userinput)."\n";
2810: } else {
2811: print $client "refused\n";
2812: }
2813: #------------------------------- is auto-enrollment enabled?
2814: } elsif ($userinput =~/^autorun:/) {
2815: if (isClient) {
2816: my ($cmd,$cdom) = split(/:/,$userinput);
2817: my $outcome = &localenroll::run($cdom);
2818: print $client "$outcome\n";
2819: } else {
2820: print $client "0\n";
2821: }
2822: #------------------------------- get official sections (for auto-enrollment).
2823: } elsif ($userinput =~/^autogetsections:/) {
2824: if (isClient) {
2825: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
2826: my @secs = &localenroll::get_sections($coursecode,$cdom);
2827: my $seclist = &escape(join(':',@secs));
2828: print $client "$seclist\n";
2829: } else {
2830: print $client "refused\n";
2831: }
2832: #----------------------- validate owner of new course section (for auto-enrollment).
2833: } elsif ($userinput =~/^autonewcourse:/) {
2834: if (isClient) {
2835: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
2836: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
2837: print $client "$outcome\n";
2838: } else {
2839: print $client "refused\n";
2840: }
2841: #-------------- validate course section in schedule of classes (for auto-enrollment).
2842: } elsif ($userinput =~/^autovalidatecourse:/) {
2843: if (isClient) {
2844: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
2845: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
2846: print $client "$outcome\n";
2847: } else {
2848: print $client "refused\n";
2849: }
2850: #--------------------------- create password for new user (for auto-enrollment).
2851: } elsif ($userinput =~/^autocreatepassword:/) {
2852: if (isClient) {
2853: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
2854: my ($create_passwd,$authchk);
2855: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
2856: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2857: } else {
2858: print $client "refused\n";
2859: }
2860: #--------------------------- read and remove temporary files (for auto-enrollment).
2861: } elsif ($userinput =~/^autoretrieve:/) {
2862: if (isClient) {
2863: my ($cmd,$filename) = split(/:/,$userinput);
2864: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2865: if ( (-e $source) && ($filename ne '') ) {
2866: my $reply = '';
2867: if (open(my $fh,$source)) {
2868: while (<$fh>) {
2869: chomp($_);
2870: $_ =~ s/^\s+//g;
2871: $_ =~ s/\s+$//g;
2872: $reply .= $_;
2873: }
2874: close($fh);
2875: print $client &escape($reply)."\n";
2876: # unlink($source);
2877: } else {
2878: print $client "error\n";
2879: }
2880: } else {
2881: print $client "error\n";
2882: }
2883: } else {
2884: print $client "refused\n";
2885: }
2886: #--------------------- read and retrieve institutional code format (for support form).
2887: } elsif ($userinput =~/^autoinstcodeformat:/) {
2888: if (isClient) {
2889: my $reply;
2890: my($cmd,$cdom,$course) = split(/:/,$userinput);
2891: my @pairs = split/\&/,$course;
2892: my %instcodes = ();
2893: my %codes = ();
2894: my @codetitles = ();
2895: my %cat_titles = ();
2896: my %cat_order = ();
2897: foreach (@pairs) {
2898: my ($key,$value) = split/=/,$_;
2899: $instcodes{&unescape($key)} = &unescape($value);
2900: }
2901: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
2902: if ($formatreply eq 'ok') {
2903: my $codes_str = &hash2str(%codes);
2904: my $codetitles_str = &array2str(@codetitles);
2905: my $cat_titles_str = &hash2str(%cat_titles);
2906: my $cat_order_str = &hash2str(%cat_order);
2907: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
2908: }
2909: } else {
2910: print $client "refused\n";
2911: }
2912: # ------------------------------------------------------------- unknown command
2913:
2914: } else {
2915: # unknown command
2916: print $client "unknown_cmd\n";
2917: }
2918: # -------------------------------------------------------------------- complete
2919: Debug("process_request - returning 1");
2920: return 1;
2921: }
1.207 foxr 2922: #
2923: # Decipher encoded traffic
2924: # Parameters:
2925: # input - Encoded data.
2926: # Returns:
2927: # Decoded data or undef if encryption key was not yet negotiated.
2928: # Implicit input:
2929: # cipher - This global holds the negotiated encryption key.
2930: #
1.211 albertel 2931: sub decipher {
1.207 foxr 2932: my ($input) = @_;
2933: my $output = '';
1.212 foxr 2934:
2935:
1.207 foxr 2936: if($cipher) {
2937: my($enc, $enclength, $encinput) = split(/:/, $input);
2938: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
2939: $output .=
2940: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
2941: }
2942: return substr($output, 0, $enclength);
2943: } else {
2944: return undef;
2945: }
2946: }
2947:
2948: #
2949: # Register a command processor. This function is invoked to register a sub
2950: # to process a request. Once registered, the ProcessRequest sub can automatically
2951: # dispatch requests to an appropriate sub, and do the top level validity checking
2952: # as well:
2953: # - Is the keyword recognized.
2954: # - Is the proper client type attempting the request.
2955: # - Is the request encrypted if it has to be.
2956: # Parameters:
2957: # $request_name - Name of the request being registered.
2958: # This is the command request that will match
2959: # against the hash keywords to lookup the information
2960: # associated with the dispatch information.
2961: # $procedure - Reference to a sub to call to process the request.
2962: # All subs get called as follows:
2963: # Procedure($cmd, $tail, $replyfd, $key)
2964: # $cmd - the actual keyword that invoked us.
2965: # $tail - the tail of the request that invoked us.
2966: # $replyfd- File descriptor connected to the client
2967: # $must_encode - True if the request must be encoded to be good.
2968: # $client_ok - True if it's ok for a client to request this.
2969: # $manager_ok - True if it's ok for a manager to request this.
2970: # Side effects:
2971: # - On success, the Dispatcher hash has an entry added for the key $RequestName
2972: # - On failure, the program will die as it's a bad internal bug to try to
2973: # register a duplicate command handler.
2974: #
1.211 albertel 2975: sub register_handler {
1.212 foxr 2976: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 2977:
2978: # Don't allow duplication#
2979:
2980: if (defined $Dispatcher{$request_name}) {
2981: die "Attempting to define a duplicate request handler for $request_name\n";
2982: }
2983: # Build the client type mask:
2984:
2985: my $client_type_mask = 0;
2986: if($client_ok) {
2987: $client_type_mask |= $CLIENT_OK;
2988: }
2989: if($manager_ok) {
2990: $client_type_mask |= $MANAGER_OK;
2991: }
2992:
2993: # Enter the hash:
2994:
2995: my @entry = ($procedure, $must_encode, $client_type_mask);
2996:
2997: $Dispatcher{$request_name} = \@entry;
2998:
2999:
3000: }
3001:
3002:
3003: #------------------------------------------------------------------
3004:
3005:
3006:
3007:
1.141 foxr 3008: #
1.96 foxr 3009: # Convert an error return code from lcpasswd to a string value.
3010: #
3011: sub lcpasswdstrerror {
3012: my $ErrorCode = shift;
1.97 foxr 3013: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 3014: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3015: } else {
1.98 foxr 3016: return $passwderrors[$ErrorCode];
1.96 foxr 3017: }
3018: }
3019:
1.97 foxr 3020: #
3021: # Convert an error return code from lcuseradd to a string value:
3022: #
3023: sub lcuseraddstrerror {
3024: my $ErrorCode = shift;
3025: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3026: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3027: } else {
1.98 foxr 3028: return $adderrors[$ErrorCode];
1.97 foxr 3029: }
3030: }
3031:
1.23 harris41 3032: # grabs exception and records it to log before exiting
3033: sub catchexception {
1.27 albertel 3034: my ($error)=@_;
1.25 www 3035: $SIG{'QUIT'}='DEFAULT';
3036: $SIG{__DIE__}='DEFAULT';
1.165 albertel 3037: &status("Catching exception");
1.190 albertel 3038: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 3039: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 3040: ."a crash with this error msg->[$error]</font>");
1.57 www 3041: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 3042: if ($client) { print $client "error: $error\n"; }
1.59 www 3043: $server->close();
1.27 albertel 3044: die($error);
1.23 harris41 3045: }
3046:
1.63 www 3047: sub timeout {
1.165 albertel 3048: &status("Handling Timeout");
1.190 albertel 3049: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 3050: &catchexception('Timeout');
3051: }
1.22 harris41 3052: # -------------------------------- Set signal handlers to record abnormal exits
3053:
3054: $SIG{'QUIT'}=\&catchexception;
3055: $SIG{__DIE__}=\&catchexception;
3056:
1.81 matthew 3057: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 3058: &status("Read loncapa.conf and loncapa_apache.conf");
3059: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 3060: %perlvar=%{$perlvarref};
1.80 harris41 3061: undef $perlvarref;
1.19 www 3062:
1.35 harris41 3063: # ----------------------------- Make sure this process is running from user=www
3064: my $wwwid=getpwnam('www');
3065: if ($wwwid!=$<) {
1.134 albertel 3066: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3067: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 3068: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 3069: mailto $emailto -s '$subj' > /dev/null");
3070: exit 1;
3071: }
3072:
1.19 www 3073: # --------------------------------------------- Check if other instance running
3074:
3075: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3076:
3077: if (-e $pidfile) {
3078: my $lfh=IO::File->new("$pidfile");
3079: my $pide=<$lfh>;
3080: chomp($pide);
1.29 harris41 3081: if (kill 0 => $pide) { die "already running"; }
1.19 www 3082: }
1.1 albertel 3083:
3084: # ------------------------------------------------------------- Read hosts file
3085:
3086:
3087:
3088: # establish SERVER socket, bind and listen.
3089: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3090: Type => SOCK_STREAM,
3091: Proto => 'tcp',
3092: Reuse => 1,
3093: Listen => 10 )
1.29 harris41 3094: or die "making socket: $@\n";
1.1 albertel 3095:
3096: # --------------------------------------------------------- Do global variables
3097:
3098: # global variables
3099:
1.134 albertel 3100: my %children = (); # keys are current child process IDs
1.1 albertel 3101:
3102: sub REAPER { # takes care of dead children
3103: $SIG{CHLD} = \&REAPER;
1.165 albertel 3104: &status("Handling child death");
1.178 foxr 3105: my $pid;
3106: do {
3107: $pid = waitpid(-1,&WNOHANG());
3108: if (defined($children{$pid})) {
3109: &logthis("Child $pid died");
3110: delete($children{$pid});
1.183 albertel 3111: } elsif ($pid > 0) {
1.178 foxr 3112: &logthis("Unknown Child $pid died");
3113: }
3114: } while ( $pid > 0 );
3115: foreach my $child (keys(%children)) {
3116: $pid = waitpid($child,&WNOHANG());
3117: if ($pid > 0) {
3118: &logthis("Child $child - $pid looks like we missed it's death");
3119: delete($children{$pid});
3120: }
1.176 albertel 3121: }
1.165 albertel 3122: &status("Finished Handling child death");
1.1 albertel 3123: }
3124:
3125: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 3126: &status("Killing children (INT)");
1.1 albertel 3127: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3128: kill 'INT' => keys %children;
1.59 www 3129: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 3130: my $execdir=$perlvar{'lonDaemons'};
3131: unlink("$execdir/logs/lond.pid");
1.190 albertel 3132: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 3133: &status("Done killing children");
1.1 albertel 3134: exit; # clean up with dignity
3135: }
3136:
3137: sub HUPSMAN { # signal handler for SIGHUP
3138: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 3139: &status("Killing children for restart (HUP)");
1.1 albertel 3140: kill 'INT' => keys %children;
1.59 www 3141: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 3142: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 3143: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 3144: unlink("$execdir/logs/lond.pid");
1.165 albertel 3145: &status("Restarting self (HUP)");
1.1 albertel 3146: exec("$execdir/lond"); # here we go again
3147: }
3148:
1.144 foxr 3149: #
1.148 foxr 3150: # Kill off hashes that describe the host table prior to re-reading it.
3151: # Hashes affected are:
1.200 matthew 3152: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 3153: #
3154: sub KillHostHashes {
3155: foreach my $key (keys %hostid) {
3156: delete $hostid{$key};
3157: }
3158: foreach my $key (keys %hostdom) {
3159: delete $hostdom{$key};
3160: }
3161: foreach my $key (keys %hostip) {
3162: delete $hostip{$key};
3163: }
1.200 matthew 3164: foreach my $key (keys %hostdns) {
3165: delete $hostdns{$key};
3166: }
1.148 foxr 3167: }
3168: #
3169: # Read in the host table from file and distribute it into the various hashes:
3170: #
3171: # - %hostid - Indexed by IP, the loncapa hostname.
3172: # - %hostdom - Indexed by loncapa hostname, the domain.
3173: # - %hostip - Indexed by hostid, the Ip address of the host.
3174: sub ReadHostTable {
3175:
3176: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 3177: my $myloncapaname = $perlvar{'lonHostID'};
3178: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 3179: while (my $configline=<CONFIG>) {
1.178 foxr 3180: if (!($configline =~ /^\s*\#/)) {
3181: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3182: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 3183: $hostid{$ip}=$id; # LonCAPA name of host by IP.
3184: $hostdom{$id}=$domain; # LonCAPA domain name of host.
3185: $hostip{$id}=$ip; # IP address of host.
3186: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
3187:
3188: if ($id eq $perlvar{'lonHostID'}) {
3189: Debug("Found me in the host table: $name");
3190: $thisserver=$name;
3191: }
1.178 foxr 3192: }
1.148 foxr 3193: }
3194: close(CONFIG);
3195: }
3196: #
3197: # Reload the Apache daemon's state.
1.150 foxr 3198: # This is done by invoking /home/httpd/perl/apachereload
3199: # a setuid perl script that can be root for us to do this job.
1.148 foxr 3200: #
3201: sub ReloadApache {
1.150 foxr 3202: my $execdir = $perlvar{'lonDaemons'};
3203: my $script = $execdir."/apachereload";
3204: system($script);
1.148 foxr 3205: }
3206:
3207: #
1.144 foxr 3208: # Called in response to a USR2 signal.
3209: # - Reread hosts.tab
3210: # - All children connected to hosts that were removed from hosts.tab
3211: # are killed via SIGINT
3212: # - All children connected to previously existing hosts are sent SIGUSR1
3213: # - Our internal hosts hash is updated to reflect the new contents of
3214: # hosts.tab causing connections from hosts added to hosts.tab to
3215: # now be honored.
3216: #
3217: sub UpdateHosts {
1.165 albertel 3218: &status("Reload hosts.tab");
1.147 foxr 3219: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 3220: #
3221: # The %children hash has the set of IP's we currently have children
3222: # on. These need to be matched against records in the hosts.tab
3223: # Any ip's no longer in the table get killed off they correspond to
3224: # either dropped or changed hosts. Note that the re-read of the table
3225: # will take care of new and changed hosts as connections come into being.
3226:
3227:
3228: KillHostHashes;
3229: ReadHostTable;
3230:
3231: foreach my $child (keys %children) {
3232: my $childip = $children{$child};
3233: if(!$hostid{$childip}) {
1.149 foxr 3234: logthis('<font color="blue"> UpdateHosts killing child '
3235: ." $child for ip $childip </font>");
1.148 foxr 3236: kill('INT', $child);
1.149 foxr 3237: } else {
3238: logthis('<font color="green"> keeping child for ip '
3239: ." $childip (pid=$child) </font>");
1.148 foxr 3240: }
3241: }
3242: ReloadApache;
1.165 albertel 3243: &status("Finished reloading hosts.tab");
1.144 foxr 3244: }
3245:
1.148 foxr 3246:
1.57 www 3247: sub checkchildren {
1.165 albertel 3248: &status("Checking on the children (sending signals)");
1.57 www 3249: &initnewstatus();
3250: &logstatus();
3251: &logthis('Going to check on the children');
1.134 albertel 3252: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 3253: foreach (sort keys %children) {
1.57 www 3254: sleep 1;
3255: unless (kill 'USR1' => $_) {
3256: &logthis ('Child '.$_.' is dead');
3257: &logstatus($$.' is dead');
3258: }
1.61 harris41 3259: }
1.63 www 3260: sleep 5;
1.212 foxr 3261: $SIG{ALRM} = sub { Debug("timeout");
3262: die "timeout"; };
1.113 albertel 3263: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 3264: &status("Checking on the children (waiting for reports)");
1.63 www 3265: foreach (sort keys %children) {
3266: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 3267: eval {
3268: alarm(300);
1.63 www 3269: &logthis('Child '.$_.' did not respond');
1.67 albertel 3270: kill 9 => $_;
1.131 albertel 3271: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3272: #$subj="LON: $currenthostid killed lond process $_";
3273: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3274: #$execdir=$perlvar{'lonDaemons'};
3275: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.113 albertel 3276: alarm(0);
3277: }
1.63 www 3278: }
3279: }
1.113 albertel 3280: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 3281: $SIG{__DIE__} = \&catchexception;
1.165 albertel 3282: &status("Finished checking children");
1.57 www 3283: }
3284:
1.1 albertel 3285: # --------------------------------------------------------------------- Logging
3286:
3287: sub logthis {
3288: my $message=shift;
3289: my $execdir=$perlvar{'lonDaemons'};
3290: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3291: my $now=time;
3292: my $local=localtime($now);
1.58 www 3293: $lastlog=$local.': '.$message;
1.1 albertel 3294: print $fh "$local ($$): $message\n";
3295: }
3296:
1.77 foxr 3297: # ------------------------- Conditional log if $DEBUG true.
3298: sub Debug {
3299: my $message = shift;
3300: if($DEBUG) {
3301: &logthis($message);
3302: }
3303: }
1.161 foxr 3304:
3305: #
3306: # Sub to do replies to client.. this gives a hook for some
3307: # debug tracing too:
3308: # Parameters:
3309: # fd - File open on client.
3310: # reply - Text to send to client.
3311: # request - Original request from client.
3312: #
3313: sub Reply {
1.192 foxr 3314: my ($fd, $reply, $request) = @_;
1.161 foxr 3315: print $fd $reply;
3316: Debug("Request was $request Reply was $reply");
3317:
1.212 foxr 3318: $Transactions++;
3319:
3320:
3321: }
3322:
3323:
3324: #
3325: # Sub to report a failure.
3326: # This function:
3327: # - Increments the failure statistic counters.
3328: # - Invokes Reply to send the error message to the client.
3329: # Parameters:
3330: # fd - File descriptor open on the client
3331: # reply - Reply text to emit.
3332: # request - The original request message (used by Reply
3333: # to debug if that's enabled.
3334: # Implicit outputs:
3335: # $Failures- The number of failures is incremented.
3336: # Reply (invoked here) sends a message to the
3337: # client:
3338: #
3339: sub Failure {
3340: my $fd = shift;
3341: my $reply = shift;
3342: my $request = shift;
3343:
3344: $Failures++;
3345: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 3346: }
1.57 www 3347: # ------------------------------------------------------------------ Log status
3348:
3349: sub logstatus {
1.178 foxr 3350: &status("Doing logging");
3351: my $docdir=$perlvar{'lonDocRoot'};
3352: {
3353: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1.200 matthew 3354: print $fh $$."\t".$clientname."\t".$currenthostid."\t"
3355: .$status."\t".$lastlog."\t $keymode\n";
1.178 foxr 3356: $fh->close();
3357: }
3358: &status("Finished londstatus.txt");
3359: {
3360: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 3361: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 3362: $fh->close();
3363: }
3364: &status("Finished logging");
1.57 www 3365: }
3366:
3367: sub initnewstatus {
3368: my $docdir=$perlvar{'lonDocRoot'};
3369: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3370: my $now=time;
3371: my $local=localtime($now);
3372: print $fh "LOND status $local - parent $$\n\n";
1.64 www 3373: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 3374: while (my $filename=readdir(DIR)) {
1.64 www 3375: unlink("$docdir/lon-status/londchld/$filename");
3376: }
3377: closedir(DIR);
1.57 www 3378: }
3379:
3380: # -------------------------------------------------------------- Status setting
3381:
3382: sub status {
3383: my $what=shift;
3384: my $now=time;
3385: my $local=localtime($now);
1.178 foxr 3386: $status=$local.': '.$what;
3387: $0='lond: '.$what.' '.$local;
1.57 www 3388: }
1.11 www 3389:
3390: # -------------------------------------------------------- Escape Special Chars
3391:
3392: sub escape {
3393: my $str=shift;
3394: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3395: return $str;
3396: }
3397:
3398: # ----------------------------------------------------- Un-Escape Special Chars
3399:
3400: sub unescape {
3401: my $str=shift;
3402: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3403: return $str;
3404: }
3405:
1.1 albertel 3406: # ----------------------------------------------------------- Send USR1 to lonc
3407:
3408: sub reconlonc {
3409: my $peerfile=shift;
3410: &logthis("Trying to reconnect for $peerfile");
3411: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3412: if (my $fh=IO::File->new("$loncfile")) {
3413: my $loncpid=<$fh>;
3414: chomp($loncpid);
3415: if (kill 0 => $loncpid) {
3416: &logthis("lonc at pid $loncpid responding, sending USR1");
3417: kill USR1 => $loncpid;
3418: } else {
1.9 www 3419: &logthis(
1.190 albertel 3420: "<font color='red'>CRITICAL: "
1.9 www 3421: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 3422: }
3423: } else {
1.190 albertel 3424: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 3425: }
3426: }
3427:
3428: # -------------------------------------------------- Non-critical communication
1.11 www 3429:
1.1 albertel 3430: sub subreply {
3431: my ($cmd,$server)=@_;
3432: my $peerfile="$perlvar{'lonSockDir'}/$server";
3433: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3434: Type => SOCK_STREAM,
3435: Timeout => 10)
3436: or return "con_lost";
3437: print $sclient "$cmd\n";
3438: my $answer=<$sclient>;
3439: chomp($answer);
3440: if (!$answer) { $answer="con_lost"; }
3441: return $answer;
3442: }
3443:
3444: sub reply {
3445: my ($cmd,$server)=@_;
3446: my $answer;
1.115 albertel 3447: if ($server ne $currenthostid) {
1.1 albertel 3448: $answer=subreply($cmd,$server);
3449: if ($answer eq 'con_lost') {
3450: $answer=subreply("ping",$server);
3451: if ($answer ne $server) {
1.115 albertel 3452: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 3453: &reconlonc("$perlvar{'lonSockDir'}/$server");
3454: }
3455: $answer=subreply($cmd,$server);
3456: }
3457: } else {
3458: $answer='self_reply';
3459: }
3460: return $answer;
3461: }
3462:
1.13 www 3463: # -------------------------------------------------------------- Talk to lonsql
3464:
1.12 harris41 3465: sub sqlreply {
3466: my ($cmd)=@_;
3467: my $answer=subsqlreply($cmd);
3468: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3469: return $answer;
3470: }
3471:
3472: sub subsqlreply {
3473: my ($cmd)=@_;
3474: my $unixsock="mysqlsock";
3475: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3476: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3477: Type => SOCK_STREAM,
3478: Timeout => 10)
3479: or return "con_lost";
3480: print $sclient "$cmd\n";
3481: my $answer=<$sclient>;
3482: chomp($answer);
3483: if (!$answer) { $answer="con_lost"; }
3484: return $answer;
3485: }
3486:
1.1 albertel 3487: # -------------------------------------------- Return path to profile directory
1.11 www 3488:
1.1 albertel 3489: sub propath {
3490: my ($udom,$uname)=@_;
3491: $udom=~s/\W//g;
3492: $uname=~s/\W//g;
1.16 www 3493: my $subdir=$uname.'__';
1.1 albertel 3494: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3495: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3496: return $proname;
3497: }
3498:
3499: # --------------------------------------- Is this the home server of an author?
1.11 www 3500:
1.1 albertel 3501: sub ishome {
3502: my $author=shift;
3503: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3504: my ($udom,$uname)=split(/\//,$author);
3505: my $proname=propath($udom,$uname);
3506: if (-e $proname) {
3507: return 'owner';
3508: } else {
3509: return 'not_owner';
3510: }
3511: }
3512:
3513: # ======================================================= Continue main program
3514: # ---------------------------------------------------- Fork once and dissociate
3515:
1.134 albertel 3516: my $fpid=fork;
1.1 albertel 3517: exit if $fpid;
1.29 harris41 3518: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 3519:
1.29 harris41 3520: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 3521:
3522: # ------------------------------------------------------- Write our PID on disk
3523:
1.134 albertel 3524: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 3525: open (PIDSAVE,">$execdir/logs/lond.pid");
3526: print PIDSAVE "$$\n";
3527: close(PIDSAVE);
1.190 albertel 3528: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 3529: &status('Starting');
1.1 albertel 3530:
1.106 foxr 3531:
1.1 albertel 3532:
3533: # ----------------------------------------------------- Install signal handlers
3534:
1.57 www 3535:
1.1 albertel 3536: $SIG{CHLD} = \&REAPER;
3537: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3538: $SIG{HUP} = \&HUPSMAN;
1.57 www 3539: $SIG{USR1} = \&checkchildren;
1.144 foxr 3540: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 3541:
1.148 foxr 3542: # Read the host hashes:
3543:
3544: ReadHostTable;
1.106 foxr 3545:
3546: # --------------------------------------------------------------
3547: # Accept connections. When a connection comes in, it is validated
3548: # and if good, a child process is created to process transactions
3549: # along the connection.
3550:
1.1 albertel 3551: while (1) {
1.165 albertel 3552: &status('Starting accept');
1.106 foxr 3553: $client = $server->accept() or next;
1.165 albertel 3554: &status('Accepted '.$client.' off to spawn');
1.106 foxr 3555: make_new_child($client);
1.165 albertel 3556: &status('Finished spawning');
1.1 albertel 3557: }
3558:
1.212 foxr 3559: sub make_new_child {
3560: my $pid;
3561: # my $cipher; # Now global
3562: my $sigset;
1.178 foxr 3563:
1.212 foxr 3564: $client = shift;
3565: &status('Starting new child '.$client);
3566: &logthis('<font color="green"> Attempting to start child ('.$client.
3567: ")</font>");
3568: # block signal for fork
3569: $sigset = POSIX::SigSet->new(SIGINT);
3570: sigprocmask(SIG_BLOCK, $sigset)
3571: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 3572:
1.212 foxr 3573: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 3574:
1.212 foxr 3575: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3576: # connection liveness.
1.178 foxr 3577:
1.212 foxr 3578: #
3579: # Figure out who we're talking to so we can record the peer in
3580: # the pid hash.
3581: #
3582: my $caller = getpeername($client);
3583: my ($port,$iaddr);
3584: if (defined($caller) && length($caller) > 0) {
3585: ($port,$iaddr)=unpack_sockaddr_in($caller);
3586: } else {
3587: &logthis("Unable to determine who caller was, getpeername returned nothing");
3588: }
3589: if (defined($iaddr)) {
3590: $clientip = inet_ntoa($iaddr);
3591: Debug("Connected with $clientip");
3592: $clientdns = gethostbyaddr($iaddr, AF_INET);
3593: Debug("Connected with $clientdns by name");
3594: } else {
3595: &logthis("Unable to determine clientip");
3596: $clientip='Unavailable';
3597: }
3598:
3599: if ($pid) {
3600: # Parent records the child's birth and returns.
3601: sigprocmask(SIG_UNBLOCK, $sigset)
3602: or die "Can't unblock SIGINT for fork: $!\n";
3603: $children{$pid} = $clientip;
3604: &status('Started child '.$pid);
3605: return;
3606: } else {
3607: # Child can *not* return from this subroutine.
3608: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
3609: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3610: #don't get intercepted
3611: $SIG{USR1}= \&logstatus;
3612: $SIG{ALRM}= \&timeout;
3613: $lastlog='Forked ';
3614: $status='Forked';
1.178 foxr 3615:
1.212 foxr 3616: # unblock signals
3617: sigprocmask(SIG_UNBLOCK, $sigset)
3618: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 3619:
1.212 foxr 3620: # my $tmpsnum=0; # Now global
3621: #---------------------------------------------------- kerberos 5 initialization
3622: &Authen::Krb5::init_context();
3623: &Authen::Krb5::init_ets();
1.209 albertel 3624:
1.212 foxr 3625: &status('Accepted connection');
3626: # =============================================================================
3627: # do something with the connection
3628: # -----------------------------------------------------------------------------
3629: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 3630:
1.212 foxr 3631: ReadManagerTable; # May also be a manager!!
3632:
3633: my $clientrec=($hostid{$clientip} ne undef);
3634: my $ismanager=($managers{$clientip} ne undef);
3635: $clientname = "[unknonwn]";
3636: if($clientrec) { # Establish client type.
3637: $ConnectionType = "client";
3638: $clientname = $hostid{$clientip};
3639: if($ismanager) {
3640: $ConnectionType = "both";
3641: }
3642: } else {
3643: $ConnectionType = "manager";
3644: $clientname = $managers{$clientip};
3645: }
3646: my $clientok;
1.178 foxr 3647:
1.212 foxr 3648: if ($clientrec || $ismanager) {
3649: &status("Waiting for init from $clientip $clientname");
3650: &logthis('<font color="yellow">INFO: Connection, '.
3651: $clientip.
3652: " ($clientname) connection type = $ConnectionType </font>" );
3653: &status("Connecting $clientip ($clientname))");
3654: my $remotereq=<$client>;
3655: chomp($remotereq);
3656: Debug("Got init: $remotereq");
3657: my $inikeyword = split(/:/, $remotereq);
3658: if ($remotereq =~ /^init/) {
3659: &sethost("sethost:$perlvar{'lonHostID'}");
3660: #
3661: # If the remote is attempting a local init... give that a try:
3662: #
3663: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 3664:
1.212 foxr 3665: # If the connection type is ssl, but I didn't get my
3666: # certificate files yet, then I'll drop back to
3667: # insecure (if allowed).
3668:
3669: if($inittype eq "ssl") {
3670: my ($ca, $cert) = lonssl::CertificateFile;
3671: my $kfile = lonssl::KeyFile;
3672: if((!$ca) ||
3673: (!$cert) ||
3674: (!$kfile)) {
3675: $inittype = ""; # This forces insecure attempt.
3676: &logthis("<font color=\"blue\"> Certificates not "
3677: ."installed -- trying insecure auth</font>");
1.178 foxr 3678: }
1.212 foxr 3679: else { # SSL certificates are in place so
3680: } # Leave the inittype alone.
3681: }
3682:
3683: if($inittype eq "local") {
3684: my $key = LocalConnection($client, $remotereq);
3685: if($key) {
3686: Debug("Got local key $key");
3687: $clientok = 1;
3688: my $cipherkey = pack("H32", $key);
3689: $cipher = new IDEA($cipherkey);
3690: print $client "ok:local\n";
3691: &logthis('<font color="green"'
3692: . "Successful local authentication </font>");
3693: $keymode = "local"
1.178 foxr 3694: } else {
1.212 foxr 3695: Debug("Failed to get local key");
3696: $clientok = 0;
3697: shutdown($client, 3);
3698: close $client;
1.178 foxr 3699: }
1.212 foxr 3700: } elsif ($inittype eq "ssl") {
3701: my $key = SSLConnection($client);
3702: if ($key) {
3703: $clientok = 1;
3704: my $cipherkey = pack("H32", $key);
3705: $cipher = new IDEA($cipherkey);
3706: &logthis('<font color="green">'
3707: ."Successfull ssl authentication with $clientname </font>");
3708: $keymode = "ssl";
3709:
1.178 foxr 3710: } else {
1.212 foxr 3711: $clientok = 0;
3712: close $client;
1.178 foxr 3713: }
1.212 foxr 3714:
3715: } else {
3716: my $ok = InsecureConnection($client);
3717: if($ok) {
3718: $clientok = 1;
3719: &logthis('<font color="green">'
3720: ."Successful insecure authentication with $clientname </font>");
3721: print $client "ok\n";
3722: $keymode = "insecure";
1.178 foxr 3723: } else {
1.212 foxr 3724: &logthis('<font color="yellow">'
3725: ."Attempted insecure connection disallowed </font>");
3726: close $client;
3727: $clientok = 0;
1.178 foxr 3728:
3729: }
3730: }
1.212 foxr 3731: } else {
3732: &logthis(
3733: "<font color='blue'>WARNING: "
3734: ."$clientip failed to initialize: >$remotereq< </font>");
3735: &status('No init '.$clientip);
3736: }
3737:
3738: } else {
3739: &logthis(
3740: "<font color='blue'>WARNING: Unknown client $clientip</font>");
3741: &status('Hung up on '.$clientip);
3742: }
3743:
3744: if ($clientok) {
3745: # ---------------- New known client connecting, could mean machine online again
3746:
3747: foreach my $id (keys(%hostip)) {
3748: if ($hostip{$id} ne $clientip ||
3749: $hostip{$currenthostid} eq $clientip) {
3750: # no need to try to do recon's to myself
3751: next;
3752: }
3753: &reconlonc("$perlvar{'lonSockDir'}/$id");
3754: }
3755: &logthis("<font color='green'>Established connection: $clientname</font>");
3756: &status('Will listen to '.$clientname);
3757: # ------------------------------------------------------------ Process requests
3758: my $keep_going = 1;
3759: my $user_input;
3760: while(($user_input = get_request) && $keep_going) {
3761: alarm(120);
3762: Debug("Main: Got $user_input\n");
3763: $keep_going = &process_request($user_input);
1.178 foxr 3764: alarm(0);
1.212 foxr 3765: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 3766: }
1.212 foxr 3767:
1.59 www 3768: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 3769: } else {
1.161 foxr 3770: print $client "refused\n";
3771: $client->close();
1.190 albertel 3772: &logthis("<font color='blue'>WARNING: "
1.161 foxr 3773: ."Rejected client $clientip, closing connection</font>");
3774: }
1.212 foxr 3775: }
1.161 foxr 3776:
1.1 albertel 3777: # =============================================================================
1.161 foxr 3778:
1.190 albertel 3779: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 3780: ."Disconnect from $clientip ($clientname)</font>");
3781:
3782:
3783: # this exit is VERY important, otherwise the child will become
3784: # a producer of more and more children, forking yourself into
3785: # process death.
3786: exit;
1.106 foxr 3787:
1.78 foxr 3788: }
3789:
3790:
3791: #
3792: # Checks to see if the input roleput request was to set
3793: # an author role. If so, invokes the lchtmldir script to set
3794: # up a correct public_html
3795: # Parameters:
3796: # request - The request sent to the rolesput subchunk.
3797: # We're looking for /domain/_au
3798: # domain - The domain in which the user is having roles doctored.
3799: # user - Name of the user for which the role is being put.
3800: # authtype - The authentication type associated with the user.
3801: #
3802: sub ManagePermissions
3803: {
1.192 foxr 3804:
3805: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 3806:
3807: # See if the request is of the form /$domain/_au
3808: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3809: my $execdir = $perlvar{'lonDaemons'};
3810: my $userhome= "/home/$user" ;
1.134 albertel 3811: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 3812: system("$execdir/lchtmldir $userhome $user $authtype");
3813: }
3814: }
3815: #
3816: # GetAuthType - Determines the authorization type of a user in a domain.
3817:
3818: # Returns the authorization type or nouser if there is no such user.
3819: #
3820: sub GetAuthType
3821: {
1.192 foxr 3822:
3823: my ($domain, $user) = @_;
1.78 foxr 3824:
1.79 foxr 3825: Debug("GetAuthType( $domain, $user ) \n");
1.78 foxr 3826: my $proname = &propath($domain, $user);
3827: my $passwdfile = "$proname/passwd";
3828: if( -e $passwdfile ) {
3829: my $pf = IO::File->new($passwdfile);
3830: my $realpassword = <$pf>;
3831: chomp($realpassword);
1.79 foxr 3832: Debug("Password info = $realpassword\n");
1.78 foxr 3833: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 3834: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 3835: my $availinfo = '';
1.91 albertel 3836: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 3837: $availinfo = $contentpwd;
3838: }
1.79 foxr 3839:
1.78 foxr 3840: return "$authtype:$availinfo";
3841: }
3842: else {
1.79 foxr 3843: Debug("Returning nouser");
1.78 foxr 3844: return "nouser";
3845: }
1.1 albertel 3846: }
3847:
1.220 ! foxr 3848: #
! 3849: # Validate a user given their domain, name and password. This utility
! 3850: # function is used by both AuthenticateHandler and ChangePasswordHandler
! 3851: # to validate the login credentials of a user.
! 3852: # Parameters:
! 3853: # $domain - The domain being logged into (this is required due to
! 3854: # the capability for multihomed systems.
! 3855: # $user - The name of the user being validated.
! 3856: # $password - The user's propoposed password.
! 3857: #
! 3858: # Returns:
! 3859: # 1 - The domain,user,pasword triplet corresponds to a valid
! 3860: # user.
! 3861: # 0 - The domain,user,password triplet is not a valid user.
! 3862: #
! 3863: sub validate_user {
! 3864: my ($domain, $user, $password) = @_;
! 3865:
! 3866:
! 3867: # Why negative ~pi you may well ask? Well this function is about
! 3868: # authentication, and therefore very important to get right.
! 3869: # I've initialized the flag that determines whether or not I've
! 3870: # validated correctly to a value it's not supposed to get.
! 3871: # At the end of this function. I'll ensure that it's not still that
! 3872: # value so we don't just wind up returning some accidental value
! 3873: # as a result of executing an unforseen code path that
! 3874: # did not set $validated.
! 3875:
! 3876: my $validated = -3.14159;
! 3877:
! 3878: # How we authenticate is determined by the type of authentication
! 3879: # the user has been assigned. If the authentication type is
! 3880: # "nouser", the user does not exist so we will return 0.
! 3881:
! 3882: my $contents = &GetAuthType($domain, $user);
! 3883: my ($howpwd, $contentpwd) = split(/:/, $contents);
! 3884:
! 3885: my $null = pack("C",0); # Used by kerberos auth types.
! 3886:
! 3887: if ($howpwd ne 'nouser') {
! 3888:
! 3889: if($howpwd eq "internal") { # Encrypted is in local password file.
! 3890: $validated = (crypt($password, $contentpwd) eq $contentpwd);
! 3891: }
! 3892: elsif ($howpwd eq "unix") { # User is a normal unix user.
! 3893: $contentpwd = (getpwnam($user))[1];
! 3894: if($contentpwd) {
! 3895: if($contentpwd eq 'x') { # Shadow password file...
! 3896: my $pwauth_path = "/usr/local/sbin/pwauth";
! 3897: open PWAUTH, "|$pwauth_path" or
! 3898: die "Cannot invoke authentication";
! 3899: print PWAUTH "$user\n$password\n";
! 3900: close PWAUTH;
! 3901: $validated = ! $?;
! 3902:
! 3903: } else { # Passwords in /etc/passwd.
! 3904: $validated = (crypt($password,
! 3905: $contentpwd) eq $contentpwd);
! 3906: }
! 3907: } else {
! 3908: $validated = 0;
! 3909: }
! 3910: }
! 3911: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
! 3912: if(! ($password =~ /$null/) ) {
! 3913: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
! 3914: "",
! 3915: $contentpwd,,
! 3916: 'krbtgt',
! 3917: $contentpwd,
! 3918: 1,
! 3919: $password);
! 3920: if(!$k4error) {
! 3921: $validated = 1;
! 3922: }
! 3923: else {
! 3924: $validated = 0;
! 3925: &logthis('krb4: '.$user.', '.$contentpwd.', '.
! 3926: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
! 3927: }
! 3928: }
! 3929: else {
! 3930: $validated = 0; # Password has a match with null.
! 3931: }
! 3932: }
! 3933: elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
! 3934: if(!($password =~ /$null/)) { # Null password not allowed.
! 3935: my $krbclient = &Authen::Krb5::parse_name($user.'@'
! 3936: .$contentpwd);
! 3937: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
! 3938: my $krbserver = &Authen::Krb5::parse_name($krbservice);
! 3939: my $credentials= &Authen::Krb5::cc_default();
! 3940: $credentials->initialize($krbclient);
! 3941: my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,
! 3942: $krbserver,
! 3943: $password,
! 3944: $credentials);
! 3945: $validated = ($krbreturn == 1);
! 3946: }
! 3947: else {
! 3948: $validated = 0;
! 3949: }
! 3950: }
! 3951: elsif ($howpwd eq "localauth") {
! 3952: # Authenticate via installation specific authentcation method:
! 3953: $validated = &localauth::localauth($user,
! 3954: $password,
! 3955: $contentpwd);
! 3956: }
! 3957: else { # Unrecognized auth is also bad.
! 3958: $validated = 0;
! 3959: }
! 3960: } else {
! 3961: $validated = 0;
! 3962: }
! 3963: #
! 3964: # $validated has the correct stat of the authentication:
! 3965: #
! 3966:
! 3967: unless ($validated != -3.14159) {
! 3968: die "ValidateUser - failed to set the value of validated";
! 3969: }
! 3970: return $validated;
! 3971: }
! 3972:
! 3973:
1.84 albertel 3974: sub addline {
3975: my ($fname,$hostid,$ip,$newline)=@_;
3976: my $contents;
3977: my $found=0;
3978: my $expr='^'.$hostid.':'.$ip.':';
3979: $expr =~ s/\./\\\./g;
1.134 albertel 3980: my $sh;
1.84 albertel 3981: if ($sh=IO::File->new("$fname.subscription")) {
3982: while (my $subline=<$sh>) {
3983: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3984: }
3985: $sh->close();
3986: }
3987: $sh=IO::File->new(">$fname.subscription");
3988: if ($contents) { print $sh $contents; }
3989: if ($newline) { print $sh $newline; }
3990: $sh->close();
3991: return $found;
1.86 www 3992: }
3993:
3994: sub getchat {
1.122 www 3995: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 3996: my %hash;
3997: my $proname=&propath($cdom,$cname);
3998: my @entries=();
1.88 albertel 3999: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4000: &GDBM_READER(),0640)) {
4001: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4002: untie %hash;
1.123 www 4003: }
1.124 www 4004: my @participants=();
1.134 albertel 4005: my $cutoff=time-60;
1.123 www 4006: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 4007: &GDBM_WRCREAT(),0640)) {
4008: $hash{$uname.':'.$udom}=time;
1.123 www 4009: foreach (sort keys %hash) {
4010: if ($hash{$_}>$cutoff) {
1.124 www 4011: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 4012: }
4013: }
4014: untie %hash;
1.86 www 4015: }
1.124 www 4016: return (@participants,@entries);
1.86 www 4017: }
4018:
4019: sub chatadd {
1.88 albertel 4020: my ($cdom,$cname,$newchat)=@_;
4021: my %hash;
4022: my $proname=&propath($cdom,$cname);
4023: my @entries=();
1.142 www 4024: my $time=time;
1.88 albertel 4025: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4026: &GDBM_WRCREAT(),0640)) {
4027: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4028: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
4029: my ($thentime,$idnum)=split(/\_/,$lastid);
4030: my $newid=$time.'_000000';
4031: if ($thentime==$time) {
4032: $idnum=~s/^0+//;
4033: $idnum++;
4034: $idnum=substr('000000'.$idnum,-6,6);
4035: $newid=$time.'_'.$idnum;
4036: }
4037: $hash{$newid}=$newchat;
4038: my $expired=$time-3600;
4039: foreach (keys %hash) {
4040: my ($thistime)=($_=~/(\d+)\_/);
4041: if ($thistime<$expired) {
1.89 www 4042: delete $hash{$_};
1.88 albertel 4043: }
4044: }
4045: untie %hash;
1.142 www 4046: }
4047: {
4048: my $hfh;
4049: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
4050: print $hfh "$time:".&unescape($newchat)."\n";
4051: }
1.86 www 4052: }
1.84 albertel 4053: }
4054:
4055: sub unsub {
4056: my ($fname,$clientip)=@_;
4057: my $result;
1.188 foxr 4058: my $unsubs = 0; # Number of successful unsubscribes:
4059:
4060:
4061: # An old way subscriptions were handled was to have a
4062: # subscription marker file:
4063:
4064: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 4065: if (unlink("$fname.$clientname")) {
1.188 foxr 4066: $unsubs++; # Successful unsub via marker file.
4067: }
4068:
4069: # The more modern way to do it is to have a subscription list
4070: # file:
4071:
1.84 albertel 4072: if (-e "$fname.subscription") {
1.161 foxr 4073: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 4074: if ($found) {
4075: $unsubs++;
4076: }
4077: }
4078:
4079: # If either or both of these mechanisms succeeded in unsubscribing a
4080: # resource we can return ok:
4081:
4082: if($unsubs) {
4083: $result = "ok\n";
1.84 albertel 4084: } else {
1.188 foxr 4085: $result = "not_subscribed\n";
1.84 albertel 4086: }
1.188 foxr 4087:
1.84 albertel 4088: return $result;
4089: }
4090:
1.101 www 4091: sub currentversion {
4092: my $fname=shift;
4093: my $version=-1;
4094: my $ulsdir='';
4095: if ($fname=~/^(.+)\/[^\/]+$/) {
4096: $ulsdir=$1;
4097: }
1.114 albertel 4098: my ($fnamere1,$fnamere2);
4099: # remove version if already specified
1.101 www 4100: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 4101: # get the bits that go before and after the version number
4102: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4103: $fnamere1=$1;
4104: $fnamere2='.'.$2;
4105: }
1.101 www 4106: if (-e $fname) { $version=1; }
4107: if (-e $ulsdir) {
1.134 albertel 4108: if(-d $ulsdir) {
4109: if (opendir(LSDIR,$ulsdir)) {
4110: my $ulsfn;
4111: while ($ulsfn=readdir(LSDIR)) {
1.101 www 4112: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 4113: my $thisfile=$ulsdir.'/'.$ulsfn;
4114: unless (-l $thisfile) {
1.160 www 4115: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 4116: if ($1>$version) { $version=$1; }
4117: }
4118: }
4119: }
4120: closedir(LSDIR);
4121: $version++;
4122: }
4123: }
4124: }
4125: return $version;
1.101 www 4126: }
4127:
4128: sub thisversion {
4129: my $fname=shift;
4130: my $version=-1;
4131: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4132: $version=$1;
4133: }
4134: return $version;
4135: }
4136:
1.84 albertel 4137: sub subscribe {
4138: my ($userinput,$clientip)=@_;
4139: my $result;
4140: my ($cmd,$fname)=split(/:/,$userinput);
4141: my $ownership=&ishome($fname);
4142: if ($ownership eq 'owner') {
1.101 www 4143: # explitly asking for the current version?
4144: unless (-e $fname) {
4145: my $currentversion=¤tversion($fname);
4146: if (&thisversion($fname)==$currentversion) {
4147: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4148: my $root=$1;
4149: my $extension=$2;
4150: symlink($root.'.'.$extension,
4151: $root.'.'.$currentversion.'.'.$extension);
1.102 www 4152: unless ($extension=~/\.meta$/) {
4153: symlink($root.'.'.$extension.'.meta',
4154: $root.'.'.$currentversion.'.'.$extension.'.meta');
4155: }
1.101 www 4156: }
4157: }
4158: }
1.84 albertel 4159: if (-e $fname) {
4160: if (-d $fname) {
4161: $result="directory\n";
4162: } else {
1.161 foxr 4163: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 4164: my $now=time;
1.161 foxr 4165: my $found=&addline($fname,$clientname,$clientip,
4166: "$clientname:$clientip:$now\n");
1.84 albertel 4167: if ($found) { $result="$fname\n"; }
4168: # if they were subscribed to only meta data, delete that
4169: # subscription, when you subscribe to a file you also get
4170: # the metadata
4171: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4172: $fname=~s/\/home\/httpd\/html\/res/raw/;
4173: $fname="http://$thisserver/".$fname;
4174: $result="$fname\n";
4175: }
4176: } else {
4177: $result="not_found\n";
4178: }
4179: } else {
4180: $result="rejected\n";
4181: }
4182: return $result;
4183: }
1.91 albertel 4184:
4185: sub make_passwd_file {
1.98 foxr 4186: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 4187: my $result="ok\n";
4188: if ($umode eq 'krb4' or $umode eq 'krb5') {
4189: {
4190: my $pf = IO::File->new(">$passfilename");
4191: print $pf "$umode:$npass\n";
4192: }
4193: } elsif ($umode eq 'internal') {
4194: my $salt=time;
4195: $salt=substr($salt,6,2);
4196: my $ncpass=crypt($npass,$salt);
4197: {
4198: &Debug("Creating internal auth");
4199: my $pf = IO::File->new(">$passfilename");
4200: print $pf "internal:$ncpass\n";
4201: }
4202: } elsif ($umode eq 'localauth') {
4203: {
4204: my $pf = IO::File->new(">$passfilename");
4205: print $pf "localauth:$npass\n";
4206: }
4207: } elsif ($umode eq 'unix') {
4208: {
1.186 foxr 4209: #
4210: # Don't allow the creation of privileged accounts!!! that would
4211: # be real bad!!!
4212: #
4213: my $uid = getpwnam($uname);
4214: if((defined $uid) && ($uid == 0)) {
4215: &logthis(">>>Attempted to create privilged account blocked");
4216: return "no_priv_account_error\n";
4217: }
4218:
1.91 albertel 4219: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4220: {
4221: &Debug("Executing external: ".$execpath);
1.98 foxr 4222: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 4223: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 4224: print $se "$uname\n";
4225: print $se "$npass\n";
4226: print $se "$npass\n";
1.97 foxr 4227: }
4228: my $useraddok = $?;
4229: if($useraddok > 0) {
4230: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91 albertel 4231: }
4232: my $pf = IO::File->new(">$passfilename");
4233: print $pf "unix:\n";
4234: }
4235: } elsif ($umode eq 'none') {
4236: {
4237: my $pf = IO::File->new(">$passfilename");
4238: print $pf "none:\n";
4239: }
4240: } else {
4241: $result="auth_mode_error\n";
4242: }
4243: return $result;
1.121 albertel 4244: }
4245:
4246: sub sethost {
4247: my ($remotereq) = @_;
4248: my (undef,$hostid)=split(/:/,$remotereq);
4249: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4250: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 4251: $currenthostid =$hostid;
1.121 albertel 4252: $currentdomainid=$hostdom{$hostid};
4253: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4254: } else {
4255: &logthis("Requested host id $hostid not an alias of ".
4256: $perlvar{'lonHostID'}." refusing connection");
4257: return 'unable_to_set';
4258: }
4259: return 'ok';
4260: }
4261:
4262: sub version {
4263: my ($userinput)=@_;
4264: $remoteVERSION=(split(/:/,$userinput))[1];
4265: return "version:$VERSION";
1.127 albertel 4266: }
1.178 foxr 4267:
1.128 albertel 4268: #There is a copy of this in lonnet.pm
1.127 albertel 4269: sub userload {
4270: my $numusers=0;
4271: {
4272: opendir(LONIDS,$perlvar{'lonIDsDir'});
4273: my $filename;
4274: my $curtime=time;
4275: while ($filename=readdir(LONIDS)) {
4276: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 4277: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 4278: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 4279: }
4280: closedir(LONIDS);
4281: }
4282: my $userloadpercent=0;
4283: my $maxuserload=$perlvar{'lonUserLoadLim'};
4284: if ($maxuserload) {
1.129 albertel 4285: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 4286: }
1.130 albertel 4287: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 4288: return $userloadpercent;
1.91 albertel 4289: }
4290:
1.205 raeburn 4291: # Routines for serializing arrays and hashes (copies from lonnet)
4292:
4293: sub array2str {
4294: my (@array) = @_;
4295: my $result=&arrayref2str(\@array);
4296: $result=~s/^__ARRAY_REF__//;
4297: $result=~s/__END_ARRAY_REF__$//;
4298: return $result;
4299: }
4300:
4301: sub arrayref2str {
4302: my ($arrayref) = @_;
4303: my $result='__ARRAY_REF__';
4304: foreach my $elem (@$arrayref) {
4305: if(ref($elem) eq 'ARRAY') {
4306: $result.=&arrayref2str($elem).'&';
4307: } elsif(ref($elem) eq 'HASH') {
4308: $result.=&hashref2str($elem).'&';
4309: } elsif(ref($elem)) {
4310: #print("Got a ref of ".(ref($elem))." skipping.");
4311: } else {
4312: $result.=&escape($elem).'&';
4313: }
4314: }
4315: $result=~s/\&$//;
4316: $result .= '__END_ARRAY_REF__';
4317: return $result;
4318: }
4319:
4320: sub hash2str {
4321: my (%hash) = @_;
4322: my $result=&hashref2str(\%hash);
4323: $result=~s/^__HASH_REF__//;
4324: $result=~s/__END_HASH_REF__$//;
4325: return $result;
4326: }
4327:
4328: sub hashref2str {
4329: my ($hashref)=@_;
4330: my $result='__HASH_REF__';
4331: foreach (sort(keys(%$hashref))) {
4332: if (ref($_) eq 'ARRAY') {
4333: $result.=&arrayref2str($_).'=';
4334: } elsif (ref($_) eq 'HASH') {
4335: $result.=&hashref2str($_).'=';
4336: } elsif (ref($_)) {
4337: $result.='=';
4338: #print("Got a ref of ".(ref($_))." skipping.");
4339: } else {
4340: if ($_) {$result.=&escape($_).'=';} else { last; }
4341: }
4342:
4343: if(ref($hashref->{$_}) eq 'ARRAY') {
4344: $result.=&arrayref2str($hashref->{$_}).'&';
4345: } elsif(ref($hashref->{$_}) eq 'HASH') {
4346: $result.=&hashref2str($hashref->{$_}).'&';
4347: } elsif(ref($hashref->{$_})) {
4348: $result.='&';
4349: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
4350: } else {
4351: $result.=&escape($hashref->{$_}).'&';
4352: }
4353: }
4354: $result=~s/\&$//;
4355: $result .= '__END_HASH_REF__';
4356: return $result;
4357: }
1.200 matthew 4358:
1.61 harris41 4359: # ----------------------------------- POD (plain old documentation, CPAN style)
4360:
4361: =head1 NAME
4362:
4363: lond - "LON Daemon" Server (port "LOND" 5663)
4364:
4365: =head1 SYNOPSIS
4366:
1.74 harris41 4367: Usage: B<lond>
4368:
4369: Should only be run as user=www. This is a command-line script which
4370: is invoked by B<loncron>. There is no expectation that a typical user
4371: will manually start B<lond> from the command-line. (In other words,
4372: DO NOT START B<lond> YOURSELF.)
1.61 harris41 4373:
4374: =head1 DESCRIPTION
4375:
1.74 harris41 4376: There are two characteristics associated with the running of B<lond>,
4377: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4378: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4379: subscriptions, etc). These are described in two large
4380: sections below.
4381:
4382: B<PROCESS MANAGEMENT>
4383:
1.61 harris41 4384: Preforker - server who forks first. Runs as a daemon. HUPs.
4385: Uses IDEA encryption
4386:
1.74 harris41 4387: B<lond> forks off children processes that correspond to the other servers
4388: in the network. Management of these processes can be done at the
4389: parent process level or the child process level.
4390:
4391: B<logs/lond.log> is the location of log messages.
4392:
4393: The process management is now explained in terms of linux shell commands,
4394: subroutines internal to this code, and signal assignments:
4395:
4396: =over 4
4397:
4398: =item *
4399:
4400: PID is stored in B<logs/lond.pid>
4401:
4402: This is the process id number of the parent B<lond> process.
4403:
4404: =item *
4405:
4406: SIGTERM and SIGINT
4407:
4408: Parent signal assignment:
4409: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4410:
4411: Child signal assignment:
4412: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4413: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4414: to restart a new child.)
4415:
4416: Command-line invocations:
4417: B<kill> B<-s> SIGTERM I<PID>
4418: B<kill> B<-s> SIGINT I<PID>
4419:
4420: Subroutine B<HUNTSMAN>:
4421: This is only invoked for the B<lond> parent I<PID>.
4422: This kills all the children, and then the parent.
4423: The B<lonc.pid> file is cleared.
4424:
4425: =item *
4426:
4427: SIGHUP
4428:
4429: Current bug:
4430: This signal can only be processed the first time
4431: on the parent process. Subsequent SIGHUP signals
4432: have no effect.
4433:
4434: Parent signal assignment:
4435: $SIG{HUP} = \&HUPSMAN;
4436:
4437: Child signal assignment:
4438: none (nothing happens)
4439:
4440: Command-line invocations:
4441: B<kill> B<-s> SIGHUP I<PID>
4442:
4443: Subroutine B<HUPSMAN>:
4444: This is only invoked for the B<lond> parent I<PID>,
4445: This kills all the children, and then the parent.
4446: The B<lond.pid> file is cleared.
4447:
4448: =item *
4449:
4450: SIGUSR1
4451:
4452: Parent signal assignment:
4453: $SIG{USR1} = \&USRMAN;
4454:
4455: Child signal assignment:
4456: $SIG{USR1}= \&logstatus;
4457:
4458: Command-line invocations:
4459: B<kill> B<-s> SIGUSR1 I<PID>
4460:
4461: Subroutine B<USRMAN>:
4462: When invoked for the B<lond> parent I<PID>,
4463: SIGUSR1 is sent to all the children, and the status of
4464: each connection is logged.
1.144 foxr 4465:
4466: =item *
4467:
4468: SIGUSR2
4469:
4470: Parent Signal assignment:
4471: $SIG{USR2} = \&UpdateHosts
4472:
4473: Child signal assignment:
4474: NONE
4475:
1.74 harris41 4476:
4477: =item *
4478:
4479: SIGCHLD
4480:
4481: Parent signal assignment:
4482: $SIG{CHLD} = \&REAPER;
4483:
4484: Child signal assignment:
4485: none
4486:
4487: Command-line invocations:
4488: B<kill> B<-s> SIGCHLD I<PID>
4489:
4490: Subroutine B<REAPER>:
4491: This is only invoked for the B<lond> parent I<PID>.
4492: Information pertaining to the child is removed.
4493: The socket port is cleaned up.
4494:
4495: =back
4496:
4497: B<SERVER-SIDE ACTIVITIES>
4498:
4499: Server-side information can be accepted in an encrypted or non-encrypted
4500: method.
4501:
4502: =over 4
4503:
4504: =item ping
4505:
4506: Query a client in the hosts.tab table; "Are you there?"
4507:
4508: =item pong
4509:
4510: Respond to a ping query.
4511:
4512: =item ekey
4513:
4514: Read in encrypted key, make cipher. Respond with a buildkey.
4515:
4516: =item load
4517:
4518: Respond with CPU load based on a computation upon /proc/loadavg.
4519:
4520: =item currentauth
4521:
4522: Reply with current authentication information (only over an
4523: encrypted channel).
4524:
4525: =item auth
4526:
4527: Only over an encrypted channel, reply as to whether a user's
4528: authentication information can be validated.
4529:
4530: =item passwd
4531:
4532: Allow for a password to be set.
4533:
4534: =item makeuser
4535:
4536: Make a user.
4537:
4538: =item passwd
4539:
4540: Allow for authentication mechanism and password to be changed.
4541:
4542: =item home
1.61 harris41 4543:
1.74 harris41 4544: Respond to a question "are you the home for a given user?"
4545:
4546: =item update
4547:
4548: Update contents of a subscribed resource.
4549:
4550: =item unsubscribe
4551:
4552: The server is unsubscribing from a resource.
4553:
4554: =item subscribe
4555:
4556: The server is subscribing to a resource.
4557:
4558: =item log
4559:
4560: Place in B<logs/lond.log>
4561:
4562: =item put
4563:
4564: stores hash in namespace
4565:
4566: =item rolesput
4567:
4568: put a role into a user's environment
4569:
4570: =item get
4571:
4572: returns hash with keys from array
4573: reference filled in from namespace
4574:
4575: =item eget
4576:
4577: returns hash with keys from array
4578: reference filled in from namesp (encrypts the return communication)
4579:
4580: =item rolesget
4581:
4582: get a role from a user's environment
4583:
4584: =item del
4585:
4586: deletes keys out of array from namespace
4587:
4588: =item keys
4589:
4590: returns namespace keys
4591:
4592: =item dump
4593:
4594: dumps the complete (or key matching regexp) namespace into a hash
4595:
4596: =item store
4597:
4598: stores hash permanently
4599: for this url; hashref needs to be given and should be a \%hashname; the
4600: remaining args aren't required and if they aren't passed or are '' they will
4601: be derived from the ENV
4602:
4603: =item restore
4604:
4605: returns a hash for a given url
4606:
4607: =item querysend
4608:
4609: Tells client about the lonsql process that has been launched in response
4610: to a sent query.
4611:
4612: =item queryreply
4613:
4614: Accept information from lonsql and make appropriate storage in temporary
4615: file space.
4616:
4617: =item idput
4618:
4619: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4620: for each student, defined perhaps by the institutional Registrar.)
4621:
4622: =item idget
4623:
4624: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4625: for each student, defined perhaps by the institutional Registrar.)
4626:
4627: =item tmpput
4628:
4629: Accept and store information in temporary space.
4630:
4631: =item tmpget
4632:
4633: Send along temporarily stored information.
4634:
4635: =item ls
4636:
4637: List part of a user's directory.
4638:
1.135 foxr 4639: =item pushtable
4640:
4641: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4642: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4643: must be restored manually in case of a problem with the new table file.
4644: pushtable requires that the request be encrypted and validated via
4645: ValidateManager. The form of the command is:
4646: enc:pushtable tablename <tablecontents> \n
4647: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4648: cleartext newline.
4649:
1.74 harris41 4650: =item Hanging up (exit or init)
4651:
4652: What to do when a client tells the server that they (the client)
4653: are leaving the network.
4654:
4655: =item unknown command
4656:
4657: If B<lond> is sent an unknown command (not in the list above),
4658: it replys to the client "unknown_cmd".
1.135 foxr 4659:
1.74 harris41 4660:
4661: =item UNKNOWN CLIENT
4662:
4663: If the anti-spoofing algorithm cannot verify the client,
4664: the client is rejected (with a "refused" message sent
4665: to the client, and the connection is closed.
4666:
4667: =back
1.61 harris41 4668:
4669: =head1 PREREQUISITES
4670:
4671: IO::Socket
4672: IO::File
4673: Apache::File
4674: Symbol
4675: POSIX
4676: Crypt::IDEA
4677: LWP::UserAgent()
4678: GDBM_File
4679: Authen::Krb4
1.91 albertel 4680: Authen::Krb5
1.61 harris41 4681:
4682: =head1 COREQUISITES
4683:
4684: =head1 OSNAMES
4685:
4686: linux
4687:
4688: =head1 SCRIPT CATEGORIES
4689:
4690: Server/Process
4691:
4692: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom