Annotation of loncom/lond, revision 1.248
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.248 ! foxr 5: # $Id: lond,v 1.247 2004/09/02 18:37:44 albertel Exp $
1.60 www 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.193 raeburn 48: use localenroll;
1.143 foxr 49: use File::Copy;
1.169 foxr 50: use LONCAPA::ConfigFileEdit;
1.200 matthew 51: use LONCAPA::lonlocal;
52: use LONCAPA::lonssl;
1.221 albertel 53: use Fcntl qw(:flock);
1.1 albertel 54:
1.239 foxr 55: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 56:
1.57 www 57: my $status='';
58: my $lastlog='';
59:
1.248 ! foxr 60: my $VERSION='$Revision: 1.247 $'; #' stupid emacs
1.121 albertel 61: my $remoteVERSION;
1.214 foxr 62: my $currenthostid="default";
1.115 albertel 63: my $currentdomainid;
1.134 albertel 64:
65: my $client;
1.200 matthew 66: my $clientip; # IP address of client.
67: my $clientdns; # DNS name of client.
68: my $clientname; # LonCAPA name of client.
1.140 foxr 69:
1.134 albertel 70: my $server;
1.200 matthew 71: my $thisserver; # DNS of us.
72:
73: my $keymode;
1.198 foxr 74:
1.207 foxr 75: my $cipher; # Cipher key negotiated with client
76: my $tmpsnum = 0; # Id of tmpputs.
77:
1.178 foxr 78: #
79: # Connection type is:
80: # client - All client actions are allowed
81: # manager - only management functions allowed.
82: # both - Both management and client actions are allowed
83: #
1.161 foxr 84:
1.178 foxr 85: my $ConnectionType;
1.161 foxr 86:
1.200 matthew 87: my %hostid; # ID's for hosts in cluster by ip.
88: my %hostdom; # LonCAPA domain for hosts in cluster.
89: my %hostip; # IPs for hosts in cluster.
90: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 91:
1.178 foxr 92: my %managers; # Ip -> manager names
1.161 foxr 93:
1.178 foxr 94: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 95:
1.178 foxr 96: #
1.207 foxr 97: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
98: # Each element of the hash contains a reference to an array that contains:
99: # A reference to a sub that executes the request corresponding to the keyword.
100: # A flag that is true if the request must be encoded to be acceptable.
101: # A mask with bits as follows:
102: # CLIENT_OK - Set when the function is allowed by ordinary clients
103: # MANAGER_OK - Set when the function is allowed to manager clients.
104: #
105: my $CLIENT_OK = 1;
106: my $MANAGER_OK = 2;
107: my %Dispatcher;
108:
109:
110: #
1.178 foxr 111: # The array below are password error strings."
112: #
113: my $lastpwderror = 13; # Largest error number from lcpasswd.
114: my @passwderrors = ("ok",
115: "lcpasswd must be run as user 'www'",
116: "lcpasswd got incorrect number of arguments",
117: "lcpasswd did not get the right nubmer of input text lines",
118: "lcpasswd too many simultaneous pwd changes in progress",
119: "lcpasswd User does not exist.",
120: "lcpasswd Incorrect current passwd",
121: "lcpasswd Unable to su to root.",
122: "lcpasswd Cannot set new passwd.",
123: "lcpasswd Username has invalid characters",
124: "lcpasswd Invalid characters in password",
1.223 foxr 125: "lcpasswd User already exists",
126: "lcpasswd Something went wrong with user addition.",
127: "lcpasswd Password mismatch",
128: "lcpasswd Error filename is invalid");
1.97 foxr 129:
130:
1.178 foxr 131: # The array below are lcuseradd error strings.:
1.97 foxr 132:
1.178 foxr 133: my $lastadderror = 13;
134: my @adderrors = ("ok",
135: "User ID mismatch, lcuseradd must run as user www",
136: "lcuseradd Incorrect number of command line parameters must be 3",
137: "lcuseradd Incorrect number of stdinput lines, must be 3",
138: "lcuseradd Too many other simultaneous pwd changes in progress",
139: "lcuseradd User does not exist",
140: "lcuseradd Unable to make www member of users's group",
141: "lcuseradd Unable to su to root",
142: "lcuseradd Unable to set password",
143: "lcuseradd Usrname has invalid characters",
144: "lcuseradd Password has an invalid character",
145: "lcuseradd User already exists",
146: "lcuseradd Could not add user.",
147: "lcuseradd Password mismatch");
1.97 foxr 148:
1.96 foxr 149:
1.207 foxr 150:
151: #
152: # Statistics that are maintained and dislayed in the status line.
153: #
1.212 foxr 154: my $Transactions = 0; # Number of attempted transactions.
155: my $Failures = 0; # Number of transcations failed.
1.207 foxr 156:
157: # ResetStatistics:
158: # Resets the statistics counters:
159: #
160: sub ResetStatistics {
161: $Transactions = 0;
162: $Failures = 0;
163: }
164:
1.200 matthew 165: #------------------------------------------------------------------------
166: #
167: # LocalConnection
168: # Completes the formation of a locally authenticated connection.
169: # This function will ensure that the 'remote' client is really the
170: # local host. If not, the connection is closed, and the function fails.
171: # If so, initcmd is parsed for the name of a file containing the
172: # IDEA session key. The fie is opened, read, deleted and the session
173: # key returned to the caller.
174: #
175: # Parameters:
176: # $Socket - Socket open on client.
177: # $initcmd - The full text of the init command.
178: #
179: # Implicit inputs:
180: # $clientdns - The DNS name of the remote client.
181: # $thisserver - Our DNS name.
182: #
183: # Returns:
184: # IDEA session key on success.
185: # undef on failure.
186: #
187: sub LocalConnection {
188: my ($Socket, $initcmd) = @_;
189: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
190: if($clientdns ne $thisserver) {
191: &logthis('<font color="red"> LocalConnection rejecting non local: '
192: ."$clientdns ne $thisserver </font>");
193: close $Socket;
194: return undef;
1.224 foxr 195: } else {
1.200 matthew 196: chomp($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;
1.224 foxr 326: } else {
1.200 matthew 327: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
328: &status("No challenge reqply");
329: return 0;
330: }
331:
332:
333: }
334:
1.96 foxr 335: #
1.140 foxr 336: # GetCertificate: Given a transaction that requires a certificate,
337: # this function will extract the certificate from the transaction
338: # request. Note that at this point, the only concept of a certificate
339: # is the hostname to which we are connected.
340: #
341: # Parameter:
342: # request - The request sent by our client (this parameterization may
343: # need to change when we really use a certificate granting
344: # authority.
345: #
346: sub GetCertificate {
347: my $request = shift;
348:
349: return $clientip;
350: }
1.161 foxr 351:
1.178 foxr 352: #
353: # Return true if client is a manager.
354: #
355: sub isManager {
356: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
357: }
358: #
359: # Return tru if client can do client functions
360: #
361: sub isClient {
362: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
363: }
1.161 foxr 364:
365:
1.156 foxr 366: #
367: # ReadManagerTable: Reads in the current manager table. For now this is
368: # done on each manager authentication because:
369: # - These authentications are not frequent
370: # - This allows dynamic changes to the manager table
371: # without the need to signal to the lond.
372: #
373: sub ReadManagerTable {
374:
375: # Clean out the old table first..
376:
1.166 foxr 377: foreach my $key (keys %managers) {
378: delete $managers{$key};
379: }
380:
381: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
382: if (!open (MANAGERS, $tablename)) {
383: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
384: return;
385: }
386: while(my $host = <MANAGERS>) {
387: chomp($host);
388: if ($host =~ "^#") { # Comment line.
389: next;
390: }
391: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 392: # The entry is of the form:
393: # cluname:hostname
394: # cluname - A 'cluster hostname' is needed in order to negotiate
395: # the host key.
396: # hostname- The dns name of the host.
397: #
1.166 foxr 398: my($cluname, $dnsname) = split(/:/, $host);
399:
400: my $ip = gethostbyname($dnsname);
401: if(defined($ip)) { # bad names don't deserve entry.
402: my $hostip = inet_ntoa($ip);
403: $managers{$hostip} = $cluname;
404: logthis('<font color="green"> registering manager '.
405: "$dnsname as $cluname with $hostip </font>\n");
406: }
407: } else {
408: logthis('<font color="green"> existing host'." $host</font>\n");
409: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
410: }
411: }
1.156 foxr 412: }
1.140 foxr 413:
414: #
415: # ValidManager: Determines if a given certificate represents a valid manager.
416: # in this primitive implementation, the 'certificate' is
417: # just the connecting loncapa client name. This is checked
418: # against a valid client list in the configuration.
419: #
420: #
421: sub ValidManager {
422: my $certificate = shift;
423:
1.163 foxr 424: return isManager;
1.140 foxr 425: }
426: #
1.143 foxr 427: # CopyFile: Called as part of the process of installing a
428: # new configuration file. This function copies an existing
429: # file to a backup file.
430: # Parameters:
431: # oldfile - Name of the file to backup.
432: # newfile - Name of the backup file.
433: # Return:
434: # 0 - Failure (errno has failure reason).
435: # 1 - Success.
436: #
437: sub CopyFile {
1.192 foxr 438:
439: my ($oldfile, $newfile) = @_;
1.143 foxr 440:
441: # The file must exist:
442:
443: if(-e $oldfile) {
444:
445: # Read the old file.
446:
447: my $oldfh = IO::File->new("< $oldfile");
448: if(!$oldfh) {
449: return 0;
450: }
451: my @contents = <$oldfh>; # Suck in the entire file.
452:
453: # write the backup file:
454:
455: my $newfh = IO::File->new("> $newfile");
456: if(!(defined $newfh)){
457: return 0;
458: }
459: my $lines = scalar @contents;
460: for (my $i =0; $i < $lines; $i++) {
461: print $newfh ($contents[$i]);
462: }
463:
464: $oldfh->close;
465: $newfh->close;
466:
467: chmod(0660, $newfile);
468:
469: return 1;
470:
471: } else {
472: return 0;
473: }
474: }
1.157 foxr 475: #
476: # Host files are passed out with externally visible host IPs.
477: # If, for example, we are behind a fire-wall or NAT host, our
478: # internally visible IP may be different than the externally
479: # visible IP. Therefore, we always adjust the contents of the
480: # host file so that the entry for ME is the IP that we believe
481: # we have. At present, this is defined as the entry that
482: # DNS has for us. If by some chance we are not able to get a
483: # DNS translation for us, then we assume that the host.tab file
484: # is correct.
485: # BUGBUGBUG - in the future, we really should see if we can
486: # easily query the interface(s) instead.
487: # Parameter(s):
488: # contents - The contents of the host.tab to check.
489: # Returns:
490: # newcontents - The adjusted contents.
491: #
492: #
493: sub AdjustHostContents {
494: my $contents = shift;
495: my $adjusted;
496: my $me = $perlvar{'lonHostID'};
497:
1.166 foxr 498: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 499: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
500: chomp($line);
501: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
502: if ($id eq $me) {
1.166 foxr 503: my $ip = gethostbyname($name);
504: my $ipnew = inet_ntoa($ip);
505: $ip = $ipnew;
1.157 foxr 506: # Reconstruct the host line and append to adjusted:
507:
1.166 foxr 508: my $newline = "$id:$domain:$role:$name:$ip";
509: if($maxcon ne "") { # Not all hosts have loncnew tuning params
510: $newline .= ":$maxcon:$idleto:$mincon";
511: }
512: $adjusted .= $newline."\n";
1.157 foxr 513:
1.166 foxr 514: } else { # Not me, pass unmodified.
515: $adjusted .= $line."\n";
516: }
1.157 foxr 517: } else { # Blank or comment never re-written.
518: $adjusted .= $line."\n"; # Pass blanks and comments as is.
519: }
1.166 foxr 520: }
521: return $adjusted;
1.157 foxr 522: }
1.143 foxr 523: #
524: # InstallFile: Called to install an administrative file:
525: # - The file is created with <name>.tmp
526: # - The <name>.tmp file is then mv'd to <name>
527: # This lugubrious procedure is done to ensure that we are never without
528: # a valid, even if dated, version of the file regardless of who crashes
529: # and when the crash occurs.
530: #
531: # Parameters:
532: # Name of the file
533: # File Contents.
534: # Return:
535: # nonzero - success.
536: # 0 - failure and $! has an errno.
537: #
538: sub InstallFile {
1.192 foxr 539:
540: my ($Filename, $Contents) = @_;
1.143 foxr 541: my $TempFile = $Filename.".tmp";
542:
543: # Open the file for write:
544:
545: my $fh = IO::File->new("> $TempFile"); # Write to temp.
546: if(!(defined $fh)) {
547: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
548: return 0;
549: }
550: # write the contents of the file:
551:
552: print $fh ($Contents);
553: $fh->close; # In case we ever have a filesystem w. locking
554:
555: chmod(0660, $TempFile);
556:
557: # Now we can move install the file in position.
558:
559: move($TempFile, $Filename);
560:
561: return 1;
562: }
1.200 matthew 563:
564:
1.169 foxr 565: #
566: # ConfigFileFromSelector: converts a configuration file selector
567: # (one of host or domain at this point) into a
568: # configuration file pathname.
569: #
570: # Parameters:
571: # selector - Configuration file selector.
572: # Returns:
573: # Full path to the file or undef if the selector is invalid.
574: #
575: sub ConfigFileFromSelector {
576: my $selector = shift;
577: my $tablefile;
578:
579: my $tabledir = $perlvar{'lonTabDir'}.'/';
580: if ($selector eq "hosts") {
581: $tablefile = $tabledir."hosts.tab";
582: } elsif ($selector eq "domain") {
583: $tablefile = $tabledir."domain.tab";
584: } else {
585: return undef;
586: }
587: return $tablefile;
1.143 foxr 588:
1.169 foxr 589: }
1.143 foxr 590: #
1.141 foxr 591: # PushFile: Called to do an administrative push of a file.
592: # - Ensure the file being pushed is one we support.
593: # - Backup the old file to <filename.saved>
594: # - Separate the contents of the new file out from the
595: # rest of the request.
596: # - Write the new file.
597: # Parameter:
598: # Request - The entire user request. This consists of a : separated
599: # string pushfile:tablename:contents.
600: # NOTE: The contents may have :'s in it as well making things a bit
601: # more interesting... but not much.
602: # Returns:
603: # String to send to client ("ok" or "refused" if bad file).
604: #
605: sub PushFile {
606: my $request = shift;
607: my ($command, $filename, $contents) = split(":", $request, 3);
608:
609: # At this point in time, pushes for only the following tables are
610: # supported:
611: # hosts.tab ($filename eq host).
612: # domain.tab ($filename eq domain).
613: # Construct the destination filename or reject the request.
614: #
615: # lonManage is supposed to ensure this, however this session could be
616: # part of some elaborate spoof that managed somehow to authenticate.
617: #
618:
1.169 foxr 619:
620: my $tablefile = ConfigFileFromSelector($filename);
621: if(! (defined $tablefile)) {
1.141 foxr 622: return "refused";
623: }
624: #
625: # >copy< the old table to the backup table
626: # don't rename in case system crashes/reboots etc. in the time
627: # window between a rename and write.
628: #
629: my $backupfile = $tablefile;
630: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 631: if(!CopyFile($tablefile, $backupfile)) {
632: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
633: return "error:$!";
634: }
1.141 foxr 635: &logthis('<font color="green"> Pushfile: backed up '
636: .$tablefile." to $backupfile</font>");
637:
1.157 foxr 638: # If the file being pushed is the host file, we adjust the entry for ourself so that the
639: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
640: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
641: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
642: # that possibilty.
643:
644: if($filename eq "host") {
645: $contents = AdjustHostContents($contents);
646: }
647:
1.141 foxr 648: # Install the new file:
649:
1.143 foxr 650: if(!InstallFile($tablefile, $contents)) {
651: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 652: .$tablefile." $! </font>");
1.143 foxr 653: return "error:$!";
1.224 foxr 654: } else {
1.143 foxr 655: &logthis('<font color="green"> Installed new '.$tablefile
656: ."</font>");
657:
658: }
659:
1.141 foxr 660:
661: # Indicate success:
662:
663: return "ok";
664:
665: }
1.145 foxr 666:
667: #
668: # Called to re-init either lonc or lond.
669: #
670: # Parameters:
671: # request - The full request by the client. This is of the form
672: # reinit:<process>
673: # where <process> is allowed to be either of
674: # lonc or lond
675: #
676: # Returns:
677: # The string to be sent back to the client either:
678: # ok - Everything worked just fine.
679: # error:why - There was a failure and why describes the reason.
680: #
681: #
682: sub ReinitProcess {
683: my $request = shift;
684:
1.146 foxr 685:
686: # separate the request (reinit) from the process identifier and
687: # validate it producing the name of the .pid file for the process.
688: #
689: #
690: my ($junk, $process) = split(":", $request);
1.147 foxr 691: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 692: if($process eq 'lonc') {
693: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 694: if (!open(PIDFILE, "< $processpidfile")) {
695: return "error:Open failed for $processpidfile";
696: }
697: my $loncpid = <PIDFILE>;
698: close(PIDFILE);
699: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
700: ."</font>");
701: kill("USR2", $loncpid);
1.146 foxr 702: } elsif ($process eq 'lond') {
1.147 foxr 703: logthis('<font color="red"> Reinitializing self (lond) </font>');
704: &UpdateHosts; # Lond is us!!
1.146 foxr 705: } else {
706: &logthis('<font color="yellow" Invalid reinit request for '.$process
707: ."</font>");
708: return "error:Invalid process identifier $process";
709: }
1.145 foxr 710: return 'ok';
711: }
1.168 foxr 712: # Validate a line in a configuration file edit script:
713: # Validation includes:
714: # - Ensuring the command is valid.
715: # - Ensuring the command has sufficient parameters
716: # Parameters:
717: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 718: #
1.168 foxr 719: # Return:
720: # 0 - Invalid scriptline.
721: # 1 - Valid scriptline
722: # NOTE:
723: # Only the command syntax is checked, not the executability of the
724: # command.
725: #
726: sub isValidEditCommand {
727: my $scriptline = shift;
728:
729: # Line elements are pipe separated:
730:
731: my ($command, $key, $newline) = split(/\|/, $scriptline);
732: &logthis('<font color="green"> isValideditCommand checking: '.
733: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
734:
735: if ($command eq "delete") {
736: #
737: # key with no newline.
738: #
739: if( ($key eq "") || ($newline ne "")) {
740: return 0; # Must have key but no newline.
741: } else {
742: return 1; # Valid syntax.
743: }
1.169 foxr 744: } elsif ($command eq "replace") {
1.168 foxr 745: #
746: # key and newline:
747: #
748: if (($key eq "") || ($newline eq "")) {
749: return 0;
750: } else {
751: return 1;
752: }
1.169 foxr 753: } elsif ($command eq "append") {
754: if (($key ne "") && ($newline eq "")) {
755: return 1;
756: } else {
757: return 0;
758: }
1.168 foxr 759: } else {
760: return 0; # Invalid command.
761: }
762: return 0; # Should not get here!!!
763: }
1.169 foxr 764: #
765: # ApplyEdit - Applies an edit command to a line in a configuration
766: # file. It is the caller's responsiblity to validate the
767: # edit line.
768: # Parameters:
769: # $directive - A single edit directive to apply.
770: # Edit directives are of the form:
771: # append|newline - Appends a new line to the file.
772: # replace|key|newline - Replaces the line with key value 'key'
773: # delete|key - Deletes the line with key value 'key'.
774: # $editor - A config file editor object that contains the
775: # file being edited.
776: #
777: sub ApplyEdit {
1.192 foxr 778:
779: my ($directive, $editor) = @_;
1.169 foxr 780:
781: # Break the directive down into its command and its parameters
782: # (at most two at this point. The meaning of the parameters, if in fact
783: # they exist depends on the command).
784:
785: my ($command, $p1, $p2) = split(/\|/, $directive);
786:
787: if($command eq "append") {
788: $editor->Append($p1); # p1 - key p2 null.
789: } elsif ($command eq "replace") {
790: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
791: } elsif ($command eq "delete") {
792: $editor->DeleteLine($p1); # p1 - key p2 null.
793: } else { # Should not get here!!!
794: die "Invalid command given to ApplyEdit $command"
795: }
796: }
797: #
798: # AdjustOurHost:
799: # Adjusts a host file stored in a configuration file editor object
800: # for the true IP address of this host. This is necessary for hosts
801: # that live behind a firewall.
802: # Those hosts have a publicly distributed IP of the firewall, but
803: # internally must use their actual IP. We assume that a given
804: # host only has a single IP interface for now.
805: # Formal Parameters:
806: # editor - The configuration file editor to adjust. This
807: # editor is assumed to contain a hosts.tab file.
808: # Strategy:
809: # - Figure out our hostname.
810: # - Lookup the entry for this host.
811: # - Modify the line to contain our IP
812: # - Do a replace for this host.
813: sub AdjustOurHost {
814: my $editor = shift;
815:
816: # figure out who I am.
817:
818: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
819:
820: # Get my host file entry.
821:
822: my $ConfigLine = $editor->Find($myHostName);
823: if(! (defined $ConfigLine)) {
824: die "AdjustOurHost - no entry for me in hosts file $myHostName";
825: }
826: # figure out my IP:
827: # Use the config line to get my hostname.
828: # Use gethostbyname to translate that into an IP address.
829: #
830: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
831: my $BinaryIp = gethostbyname($name);
832: my $ip = inet_ntoa($ip);
833: #
834: # Reassemble the config line from the elements in the list.
835: # Note that if the loncnew items were not present before, they will
836: # be now even if they would be empty
837: #
838: my $newConfigLine = $id;
839: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
840: $newConfigLine .= ":".$item;
841: }
842: # Replace the line:
843:
844: $editor->ReplaceLine($id, $newConfigLine);
845:
846: }
847: #
848: # ReplaceConfigFile:
849: # Replaces a configuration file with the contents of a
850: # configuration file editor object.
851: # This is done by:
852: # - Copying the target file to <filename>.old
853: # - Writing the new file to <filename>.tmp
854: # - Moving <filename.tmp> -> <filename>
855: # This laborious process ensures that the system is never without
856: # a configuration file that's at least valid (even if the contents
857: # may be dated).
858: # Parameters:
859: # filename - Name of the file to modify... this is a full path.
860: # editor - Editor containing the file.
861: #
862: sub ReplaceConfigFile {
1.192 foxr 863:
864: my ($filename, $editor) = @_;
1.168 foxr 865:
1.169 foxr 866: CopyFile ($filename, $filename.".old");
867:
868: my $contents = $editor->Get(); # Get the contents of the file.
869:
870: InstallFile($filename, $contents);
871: }
1.168 foxr 872: #
873: #
874: # Called to edit a configuration table file
1.167 foxr 875: # Parameters:
876: # request - The entire command/request sent by lonc or lonManage
877: # Return:
878: # The reply to send to the client.
1.168 foxr 879: #
1.167 foxr 880: sub EditFile {
881: my $request = shift;
882:
883: # Split the command into it's pieces: edit:filetype:script
884:
1.168 foxr 885: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 886:
887: # Check the pre-coditions for success:
888:
889: if($request != "edit") { # Something is amiss afoot alack.
890: return "error:edit request detected, but request != 'edit'\n";
891: }
892: if( ($filetype ne "hosts") &&
893: ($filetype ne "domain")) {
894: return "error:edit requested with invalid file specifier: $filetype \n";
895: }
896:
897: # Split the edit script and check it's validity.
1.168 foxr 898:
899: my @scriptlines = split(/\n/, $script); # one line per element.
900: my $linecount = scalar(@scriptlines);
901: for(my $i = 0; $i < $linecount; $i++) {
902: chomp($scriptlines[$i]);
903: if(!isValidEditCommand($scriptlines[$i])) {
904: return "error:edit with bad script line: '$scriptlines[$i]' \n";
905: }
906: }
1.145 foxr 907:
1.167 foxr 908: # Execute the edit operation.
1.169 foxr 909: # - Create a config file editor for the appropriate file and
910: # - execute each command in the script:
911: #
912: my $configfile = ConfigFileFromSelector($filetype);
913: if (!(defined $configfile)) {
914: return "refused\n";
915: }
916: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 917:
1.169 foxr 918: for (my $i = 0; $i < $linecount; $i++) {
919: ApplyEdit($scriptlines[$i], $editor);
920: }
921: # If the file is the host file, ensure that our host is
922: # adjusted to have our ip:
923: #
924: if($filetype eq "host") {
925: AdjustOurHost($editor);
926: }
927: # Finally replace the current file with our file.
928: #
929: ReplaceConfigFile($configfile, $editor);
1.167 foxr 930:
931: return "ok\n";
932: }
1.207 foxr 933:
934: #---------------------------------------------------------------
935: #
936: # Manipulation of hash based databases (factoring out common code
937: # for later use as we refactor.
938: #
939: # Ties a domain level resource file to a hash.
940: # If requested a history entry is created in the associated hist file.
941: #
942: # Parameters:
943: # domain - Name of the domain in which the resource file lives.
944: # namespace - Name of the hash within that domain.
945: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
946: # loghead - Optional parameter, if present a log entry is created
947: # in the associated history file and this is the first part
948: # of that entry.
949: # logtail - Goes along with loghead, The actual logentry is of the
950: # form $loghead:<timestamp>:logtail.
951: # Returns:
952: # Reference to a hash bound to the db file or alternatively undef
953: # if the tie failed.
954: #
1.209 albertel 955: sub tie_domain_hash {
1.210 albertel 956: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 957:
958: # Filter out any whitespace in the domain name:
959:
960: $domain =~ s/\W//g;
961:
962: # We have enough to go on to tie the hash:
963:
964: my $user_top_dir = $perlvar{'lonUsersDir'};
965: my $domain_dir = $user_top_dir."/$domain";
966: my $resource_file = $domain_dir."/$namespace.db";
967: my %hash;
968: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
1.211 albertel 969: if (defined($loghead)) { # Need to log the operation.
1.210 albertel 970: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
1.207 foxr 971: if($logFh) {
972: my $timestamp = time;
973: print $logFh "$loghead:$timestamp:$logtail\n";
974: }
1.210 albertel 975: $logFh->close;
1.207 foxr 976: }
977: return \%hash; # Return the tied hash.
1.210 albertel 978: } else {
1.207 foxr 979: return undef; # Tie failed.
980: }
981: }
982:
983: #
984: # Ties a user's resource file to a hash.
985: # If necessary, an appropriate history
986: # log file entry is made as well.
987: # This sub factors out common code from the subs that manipulate
988: # the various gdbm files that keep keyword value pairs.
989: # Parameters:
990: # domain - Name of the domain the user is in.
991: # user - Name of the 'current user'.
992: # namespace - Namespace representing the file to tie.
993: # how - What the tie is done to (e.g. GDBM_WRCREAT().
994: # loghead - Optional first part of log entry if there may be a
995: # history file.
996: # what - Optional tail of log entry if there may be a history
997: # file.
998: # Returns:
999: # hash to which the database is tied. It's up to the caller to untie.
1000: # undef if the has could not be tied.
1001: #
1.210 albertel 1002: sub tie_user_hash {
1003: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1004:
1005: $namespace=~s/\//\_/g; # / -> _
1006: $namespace=~s/\W//g; # whitespace eliminated.
1007: my $proname = propath($domain, $user);
1008:
1009: # Tie the database.
1010:
1011: my %hash;
1012: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1013: $how, 0640)) {
1.209 albertel 1014: # If this is a namespace for which a history is kept,
1015: # make the history log entry:
1.211 albertel 1016: if (($namespace =~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 1017: my $args = scalar @_;
1018: Debug(" Opening history: $namespace $args");
1019: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1020: if($hfh) {
1021: my $now = time;
1022: print $hfh "$loghead:$now:$what\n";
1023: }
1.210 albertel 1024: $hfh->close;
1.209 albertel 1025: }
1.207 foxr 1026: return \%hash;
1.209 albertel 1027: } else {
1.207 foxr 1028: return undef;
1029: }
1030:
1031: }
1.214 foxr 1032:
1033: #--------------------- Request Handlers --------------------------------------------
1034: #
1.215 foxr 1035: # By convention each request handler registers itself prior to the sub
1036: # declaration:
1.214 foxr 1037: #
1038:
1.216 foxr 1039: #++
1040: #
1.214 foxr 1041: # Handles ping requests.
1042: # Parameters:
1043: # $cmd - the actual keyword that invoked us.
1044: # $tail - the tail of the request that invoked us.
1045: # $replyfd- File descriptor connected to the client
1046: # Implicit Inputs:
1047: # $currenthostid - Global variable that carries the name of the host we are
1048: # known as.
1049: # Returns:
1050: # 1 - Ok to continue processing.
1051: # 0 - Program should exit.
1052: # Side effects:
1053: # Reply information is sent to the client.
1054:
1055: sub ping_handler {
1056: my ($cmd, $tail, $client) = @_;
1057: Debug("$cmd $tail $client .. $currenthostid:");
1058:
1059: Reply( $client,"$currenthostid\n","$cmd:$tail");
1060:
1061: return 1;
1062: }
1063: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1064:
1.216 foxr 1065: #++
1.215 foxr 1066: #
1067: # Handles pong requests. Pong replies with our current host id, and
1068: # the results of a ping sent to us via our lonc.
1069: #
1070: # Parameters:
1071: # $cmd - the actual keyword that invoked us.
1072: # $tail - the tail of the request that invoked us.
1073: # $replyfd- File descriptor connected to the client
1074: # Implicit Inputs:
1075: # $currenthostid - Global variable that carries the name of the host we are
1076: # connected to.
1077: # Returns:
1078: # 1 - Ok to continue processing.
1079: # 0 - Program should exit.
1080: # Side effects:
1081: # Reply information is sent to the client.
1082:
1083: sub pong_handler {
1084: my ($cmd, $tail, $replyfd) = @_;
1085:
1086: my $reply=&reply("ping",$clientname);
1087: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1088: return 1;
1089: }
1090: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1091:
1.216 foxr 1092: #++
1093: # Called to establish an encrypted session key with the remote client.
1094: # Note that with secure lond, in most cases this function is never
1095: # invoked. Instead, the secure session key is established either
1096: # via a local file that's locked down tight and only lives for a short
1097: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1098: # bits from /dev/urandom, rather than the predictable pattern used by
1099: # by this sub. This sub is only used in the old-style insecure
1100: # key negotiation.
1101: # Parameters:
1102: # $cmd - the actual keyword that invoked us.
1103: # $tail - the tail of the request that invoked us.
1104: # $replyfd- File descriptor connected to the client
1105: # Implicit Inputs:
1106: # $currenthostid - Global variable that carries the name of the host
1107: # known as.
1108: # $clientname - Global variable that carries the name of the hsot we're connected to.
1109: # Returns:
1110: # 1 - Ok to continue processing.
1111: # 0 - Program should exit.
1112: # Implicit Outputs:
1113: # Reply information is sent to the client.
1114: # $cipher is set with a reference to a new IDEA encryption object.
1115: #
1116: sub establish_key_handler {
1117: my ($cmd, $tail, $replyfd) = @_;
1118:
1119: my $buildkey=time.$$.int(rand 100000);
1120: $buildkey=~tr/1-6/A-F/;
1121: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1122: my $key=$currenthostid.$clientname;
1123: $key=~tr/a-z/A-Z/;
1124: $key=~tr/G-P/0-9/;
1125: $key=~tr/Q-Z/0-9/;
1126: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1127: $key=substr($key,0,32);
1128: my $cipherkey=pack("H32",$key);
1129: $cipher=new IDEA $cipherkey;
1130: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1131:
1132: return 1;
1133:
1134: }
1135: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1136:
1.215 foxr 1137:
1.217 foxr 1138: # Handler for the load command. Returns the current system load average
1139: # to the requestor.
1140: #
1141: # Parameters:
1142: # $cmd - the actual keyword that invoked us.
1143: # $tail - the tail of the request that invoked us.
1144: # $replyfd- File descriptor connected to the client
1145: # Implicit Inputs:
1146: # $currenthostid - Global variable that carries the name of the host
1147: # known as.
1148: # $clientname - Global variable that carries the name of the hsot we're connected to.
1149: # Returns:
1150: # 1 - Ok to continue processing.
1151: # 0 - Program should exit.
1152: # Side effects:
1153: # Reply information is sent to the client.
1154: sub load_handler {
1155: my ($cmd, $tail, $replyfd) = @_;
1156:
1157: # Get the load average from /proc/loadavg and calculate it as a percentage of
1158: # the allowed load limit as set by the perl global variable lonLoadLim
1159:
1160: my $loadavg;
1161: my $loadfile=IO::File->new('/proc/loadavg');
1162:
1163: $loadavg=<$loadfile>;
1164: $loadavg =~ s/\s.*//g; # Extract the first field only.
1165:
1166: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1167:
1168: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1169:
1170: return 1;
1171: }
1172: register_handler("load", \&load_handler, 0, 1, 0);
1173:
1174: #
1175: # Process the userload request. This sub returns to the client the current
1176: # user load average. It can be invoked either by clients or managers.
1177: #
1178: # Parameters:
1179: # $cmd - the actual keyword that invoked us.
1180: # $tail - the tail of the request that invoked us.
1181: # $replyfd- File descriptor connected to the client
1182: # Implicit Inputs:
1183: # $currenthostid - Global variable that carries the name of the host
1184: # known as.
1185: # $clientname - Global variable that carries the name of the hsot we're connected to.
1186: # Returns:
1187: # 1 - Ok to continue processing.
1188: # 0 - Program should exit
1189: # Implicit inputs:
1190: # whatever the userload() function requires.
1191: # Implicit outputs:
1192: # the reply is written to the client.
1193: #
1194: sub user_load_handler {
1195: my ($cmd, $tail, $replyfd) = @_;
1196:
1197: my $userloadpercent=&userload();
1198: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1199:
1200: return 1;
1201: }
1202: register_handler("userload", \&user_load_handler, 0, 1, 0);
1203:
1.218 foxr 1204: # Process a request for the authorization type of a user:
1205: # (userauth).
1206: #
1207: # Parameters:
1208: # $cmd - the actual keyword that invoked us.
1209: # $tail - the tail of the request that invoked us.
1210: # $replyfd- File descriptor connected to the client
1211: # Returns:
1212: # 1 - Ok to continue processing.
1213: # 0 - Program should exit
1214: # Implicit outputs:
1215: # The user authorization type is written to the client.
1216: #
1217: sub user_authorization_type {
1218: my ($cmd, $tail, $replyfd) = @_;
1219:
1220: my $userinput = "$cmd:$tail";
1221:
1222: # Pull the domain and username out of the command tail.
1.222 foxr 1223: # and call get_auth_type to determine the authentication type.
1.218 foxr 1224:
1225: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1226: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1227: if($result eq "nouser") {
1228: &Failure( $replyfd, "unknown_user\n", $userinput);
1229: } else {
1230: #
1.222 foxr 1231: # We only want to pass the second field from get_auth_type
1.218 foxr 1232: # for ^krb.. otherwise we'll be handing out the encrypted
1233: # password for internals e.g.
1234: #
1235: my ($type,$otherinfo) = split(/:/,$result);
1236: if($type =~ /^krb/) {
1237: $type = $result;
1238: }
1.222 foxr 1239: &Reply( $replyfd, "$type:\n", $userinput);
1.218 foxr 1240: }
1241:
1242: return 1;
1243: }
1244: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1245:
1246: # Process a request by a manager to push a hosts or domain table
1247: # to us. We pick apart the command and pass it on to the subs
1248: # that already exist to do this.
1249: #
1250: # Parameters:
1251: # $cmd - the actual keyword that invoked us.
1252: # $tail - the tail of the request that invoked us.
1253: # $client - File descriptor connected to the client
1254: # Returns:
1255: # 1 - Ok to continue processing.
1256: # 0 - Program should exit
1257: # Implicit Output:
1258: # a reply is written to the client.
1259:
1260: sub push_file_handler {
1261: my ($cmd, $tail, $client) = @_;
1262:
1263: my $userinput = "$cmd:$tail";
1264:
1265: # At this time we only know that the IP of our partner is a valid manager
1266: # the code below is a hook to do further authentication (e.g. to resolve
1267: # spoofing).
1268:
1269: my $cert = &GetCertificate($userinput);
1270: if(&ValidManager($cert)) {
1271:
1272: # Now presumably we have the bona fides of both the peer host and the
1273: # process making the request.
1274:
1275: my $reply = &PushFile($userinput);
1276: &Reply($client, "$reply\n", $userinput);
1277:
1278: } else {
1279: &Failure( $client, "refused\n", $userinput);
1280: }
1.219 foxr 1281: return 1;
1.218 foxr 1282: }
1283: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1284:
1.243 banghart 1285: #
1286: # du - list the disk usuage of a directory recursively.
1287: #
1288: # note: stolen code from the ls file handler
1289: # under construction by Rick Banghart
1290: # .
1291: # Parameters:
1292: # $cmd - The command that dispatched us (du).
1293: # $ududir - The directory path to list... I'm not sure what this
1294: # is relative as things like ls:. return e.g.
1295: # no_such_dir.
1296: # $client - Socket open on the client.
1297: # Returns:
1298: # 1 - indicating that the daemon should not disconnect.
1299: # Side Effects:
1300: # The reply is written to $client.
1301: #
1.244 banghart 1302:
1.243 banghart 1303: sub du_handler {
1304: my ($cmd, $ududir, $client) = @_;
1.245 albertel 1305: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1306: &Failure($client,"refused\n","$cmd:$ududir");
1307: return 1;
1308: }
1309: my $duout = `du -ks $ududir 2>/dev/null`;
1310: $duout=~s/[^\d]//g; #preserve only the numbers
1311: &Reply($client,"$duout\n","$cmd:$ududir");
1.243 banghart 1312: return 1;
1313: }
1314: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1315:
1316:
1.239 foxr 1317: #
1318: # ls - list the contents of a directory. For each file in the
1319: # selected directory the filename followed by the full output of
1320: # the stat function is returned. The returned info for each
1321: # file are separated by ':'. The stat fields are separated by &'s.
1322: # Parameters:
1323: # $cmd - The command that dispatched us (ls).
1324: # $ulsdir - The directory path to list... I'm not sure what this
1325: # is relative as things like ls:. return e.g.
1326: # no_such_dir.
1327: # $client - Socket open on the client.
1328: # Returns:
1329: # 1 - indicating that the daemon should not disconnect.
1330: # Side Effects:
1331: # The reply is written to $client.
1332: #
1333: sub ls_handler {
1334: my ($cmd, $ulsdir, $client) = @_;
1335:
1336: my $userinput = "$cmd:$ulsdir";
1337:
1338: my $obs;
1339: my $rights;
1340: my $ulsout='';
1341: my $ulsfn;
1342: if (-e $ulsdir) {
1343: if(-d $ulsdir) {
1344: if (opendir(LSDIR,$ulsdir)) {
1345: while ($ulsfn=readdir(LSDIR)) {
1346: undef $obs, $rights;
1347: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1348: #We do some obsolete checking here
1349: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1350: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1351: my @obsolete=<FILE>;
1352: foreach my $obsolete (@obsolete) {
1353: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
1354: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1355: }
1356: }
1357: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1358: if($obs eq '1') { $ulsout.="&1"; }
1359: else { $ulsout.="&0"; }
1360: if($rights eq '1') { $ulsout.="&1:"; }
1361: else { $ulsout.="&0:"; }
1362: }
1363: closedir(LSDIR);
1364: }
1365: } else {
1366: my @ulsstats=stat($ulsdir);
1367: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1368: }
1369: } else {
1370: $ulsout='no_such_dir';
1371: }
1372: if ($ulsout eq '') { $ulsout='empty'; }
1373: print $client "$ulsout\n";
1374:
1375: return 1;
1376:
1377: }
1378: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1379:
1.238 foxr 1380:
1.243 banghart 1381:
1382:
1.218 foxr 1383: # Process a reinit request. Reinit requests that either
1384: # lonc or lond be reinitialized so that an updated
1385: # host.tab or domain.tab can be processed.
1386: #
1387: # Parameters:
1388: # $cmd - the actual keyword that invoked us.
1389: # $tail - the tail of the request that invoked us.
1390: # $client - File descriptor connected to the client
1391: # Returns:
1392: # 1 - Ok to continue processing.
1393: # 0 - Program should exit
1394: # Implicit output:
1395: # a reply is sent to the client.
1396: #
1397: sub reinit_process_handler {
1398: my ($cmd, $tail, $client) = @_;
1399:
1400: my $userinput = "$cmd:$tail";
1401:
1402: my $cert = &GetCertificate($userinput);
1403: if(&ValidManager($cert)) {
1404: chomp($userinput);
1405: my $reply = &ReinitProcess($userinput);
1406: &Reply( $client, "$reply\n", $userinput);
1407: } else {
1408: &Failure( $client, "refused\n", $userinput);
1409: }
1410: return 1;
1411: }
1412:
1413: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1414:
1415: # Process the editing script for a table edit operation.
1416: # the editing operation must be encrypted and requested by
1417: # a manager host.
1418: #
1419: # Parameters:
1420: # $cmd - the actual keyword that invoked us.
1421: # $tail - the tail of the request that invoked us.
1422: # $client - File descriptor connected to the client
1423: # Returns:
1424: # 1 - Ok to continue processing.
1425: # 0 - Program should exit
1426: # Implicit output:
1427: # a reply is sent to the client.
1428: #
1429: sub edit_table_handler {
1430: my ($command, $tail, $client) = @_;
1431:
1432: my $userinput = "$command:$tail";
1433:
1434: my $cert = &GetCertificate($userinput);
1435: if(&ValidManager($cert)) {
1436: my($filetype, $script) = split(/:/, $tail);
1437: if (($filetype eq "hosts") ||
1438: ($filetype eq "domain")) {
1439: if($script ne "") {
1440: &Reply($client, # BUGBUG - EditFile
1441: &EditFile($userinput), # could fail.
1442: $userinput);
1443: } else {
1444: &Failure($client,"refused\n",$userinput);
1445: }
1446: } else {
1447: &Failure($client,"refused\n",$userinput);
1448: }
1449: } else {
1450: &Failure($client,"refused\n",$userinput);
1451: }
1452: return 1;
1453: }
1454: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1455:
1456:
1.220 foxr 1457: #
1458: # Authenticate a user against the LonCAPA authentication
1459: # database. Note that there are several authentication
1460: # possibilities:
1461: # - unix - The user can be authenticated against the unix
1462: # password file.
1463: # - internal - The user can be authenticated against a purely
1464: # internal per user password file.
1465: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1466: # ticket granting authority.
1467: # - user - The person tailoring LonCAPA can supply a user authentication
1468: # mechanism that is per system.
1469: #
1470: # Parameters:
1471: # $cmd - The command that got us here.
1472: # $tail - Tail of the command (remaining parameters).
1473: # $client - File descriptor connected to client.
1474: # Returns
1475: # 0 - Requested to exit, caller should shut down.
1476: # 1 - Continue processing.
1477: # Implicit inputs:
1478: # The authentication systems describe above have their own forms of implicit
1479: # input into the authentication process that are described above.
1480: #
1481: sub authenticate_handler {
1482: my ($cmd, $tail, $client) = @_;
1483:
1484:
1485: # Regenerate the full input line
1486:
1487: my $userinput = $cmd.":".$tail;
1488:
1489: # udom - User's domain.
1490: # uname - Username.
1491: # upass - User's password.
1492:
1493: my ($udom,$uname,$upass)=split(/:/,$tail);
1494: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1495: chomp($upass);
1496: $upass=&unescape($upass);
1497:
1498: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1499: if($pwdcorrect) {
1500: &Reply( $client, "authorized\n", $userinput);
1501: #
1502: # Bad credentials: Failed to authorize
1503: #
1504: } else {
1505: &Failure( $client, "non_authorized\n", $userinput);
1506: }
1507:
1508: return 1;
1509: }
1.218 foxr 1510:
1.220 foxr 1511: register_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1512:
1.222 foxr 1513: #
1514: # Change a user's password. Note that this function is complicated by
1515: # the fact that a user may be authenticated in more than one way:
1516: # At present, we are not able to change the password for all types of
1517: # authentication methods. Only for:
1518: # unix - unix password or shadow passoword style authentication.
1519: # local - Locally written authentication mechanism.
1520: # For now, kerb4 and kerb5 password changes are not supported and result
1521: # in an error.
1522: # FUTURE WORK:
1523: # Support kerberos passwd changes?
1524: # Parameters:
1525: # $cmd - The command that got us here.
1526: # $tail - Tail of the command (remaining parameters).
1527: # $client - File descriptor connected to client.
1528: # Returns
1529: # 0 - Requested to exit, caller should shut down.
1530: # 1 - Continue processing.
1531: # Implicit inputs:
1532: # The authentication systems describe above have their own forms of implicit
1533: # input into the authentication process that are described above.
1534: sub change_password_handler {
1535: my ($cmd, $tail, $client) = @_;
1536:
1537: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1538:
1539: #
1540: # udom - user's domain.
1541: # uname - Username.
1542: # upass - Current password.
1543: # npass - New password.
1544:
1545: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1546:
1547: $upass=&unescape($upass);
1548: $npass=&unescape($npass);
1549: &Debug("Trying to change password for $uname");
1550:
1551: # First require that the user can be authenticated with their
1552: # old password:
1553:
1554: my $validated = &validate_user($udom, $uname, $upass);
1555: if($validated) {
1556: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1557:
1558: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1559: if ($howpwd eq 'internal') {
1560: &Debug("internal auth");
1561: my $salt=time;
1562: $salt=substr($salt,6,2);
1563: my $ncpass=crypt($npass,$salt);
1564: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1565: &logthis("Result of password change for "
1566: ."$uname: pwchange_success");
1567: &Reply($client, "ok\n", $userinput);
1568: } else {
1569: &logthis("Unable to open $uname passwd "
1570: ."to change password");
1571: &Failure( $client, "non_authorized\n",$userinput);
1572: }
1573: } elsif ($howpwd eq 'unix') {
1574: # Unix means we have to access /etc/password
1575: &Debug("auth is unix");
1576: my $execdir=$perlvar{'lonDaemons'};
1577: &Debug("Opening lcpasswd pipeline");
1578: my $pf = IO::File->new("|$execdir/lcpasswd > "
1579: ."$perlvar{'lonDaemons'}"
1580: ."/logs/lcpasswd.log");
1581: print $pf "$uname\n$npass\n$npass\n";
1582: close $pf;
1583: my $err = $?;
1584: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
1585: &logthis("Result of password change for $uname: ".
1586: &lcpasswdstrerror($?));
1587: &Reply($client, "$result\n", $userinput);
1588: } else {
1589: # this just means that the current password mode is not
1590: # one we know how to change (e.g the kerberos auth modes or
1591: # locally written auth handler).
1592: #
1593: &Failure( $client, "auth_mode_error\n", $userinput);
1594: }
1595:
1.224 foxr 1596: } else {
1.222 foxr 1597: &Failure( $client, "non_authorized\n", $userinput);
1598: }
1599:
1600: return 1;
1601: }
1602: register_handler("passwd", \&change_password_handler, 1, 1, 0);
1603:
1604:
1.225 foxr 1605: #
1606: # Create a new user. User in this case means a lon-capa user.
1607: # The user must either already exist in some authentication realm
1608: # like kerberos or the /etc/passwd. If not, a user completely local to
1609: # this loncapa system is created.
1610: #
1611: # Parameters:
1612: # $cmd - The command that got us here.
1613: # $tail - Tail of the command (remaining parameters).
1614: # $client - File descriptor connected to client.
1615: # Returns
1616: # 0 - Requested to exit, caller should shut down.
1617: # 1 - Continue processing.
1618: # Implicit inputs:
1619: # The authentication systems describe above have their own forms of implicit
1620: # input into the authentication process that are described above.
1621: sub add_user_handler {
1622:
1623: my ($cmd, $tail, $client) = @_;
1624:
1625:
1626: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1627: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1628:
1629: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1630:
1631:
1632: if($udom eq $currentdomainid) { # Reject new users for other domains...
1633:
1634: my $oldumask=umask(0077);
1635: chomp($npass);
1636: $npass=&unescape($npass);
1637: my $passfilename = &password_path($udom, $uname);
1638: &Debug("Password file created will be:".$passfilename);
1639: if (-e $passfilename) {
1640: &Failure( $client, "already_exists\n", $userinput);
1641: } else {
1642: my @fpparts=split(/\//,$passfilename);
1643: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1644: my $fperror='';
1645: for (my $i=3;$i<= ($#fpparts-1);$i++) {
1646: $fpnow.='/'.$fpparts[$i];
1647: unless (-e $fpnow) {
1648: &logthis("mkdir $fpnow");
1649: unless (mkdir($fpnow,0777)) {
1650: $fperror="error: ".($!+0)." mkdir failed while attempting "
1651: ."makeuser";
1652: }
1653: }
1654: }
1655: unless ($fperror) {
1656: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1657: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1658: } else {
1659: &Failure($client, "$fperror\n", $userinput);
1660: }
1661: }
1662: umask($oldumask);
1663: } else {
1664: &Failure($client, "not_right_domain\n",
1665: $userinput); # Even if we are multihomed.
1666:
1667: }
1668: return 1;
1669:
1670: }
1671: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1672:
1673: #
1674: # Change the authentication method of a user. Note that this may
1675: # also implicitly change the user's password if, for example, the user is
1676: # joining an existing authentication realm. Known authentication realms at
1677: # this time are:
1678: # internal - Purely internal password file (only loncapa knows this user)
1679: # local - Institutionally written authentication module.
1680: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1681: # kerb4 - kerberos version 4
1682: # kerb5 - kerberos version 5
1683: #
1684: # Parameters:
1685: # $cmd - The command that got us here.
1686: # $tail - Tail of the command (remaining parameters).
1687: # $client - File descriptor connected to client.
1688: # Returns
1689: # 0 - Requested to exit, caller should shut down.
1690: # 1 - Continue processing.
1691: # Implicit inputs:
1692: # The authentication systems describe above have their own forms of implicit
1693: # input into the authentication process that are described above.
1694: #
1695: sub change_authentication_handler {
1696:
1697: my ($cmd, $tail, $client) = @_;
1698:
1699: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1700:
1701: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1702: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1703: if ($udom ne $currentdomainid) {
1704: &Failure( $client, "not_right_domain\n", $client);
1705: } else {
1706:
1707: chomp($npass);
1708:
1709: $npass=&unescape($npass);
1710: my $passfilename = &password_path($udom, $uname);
1711: if ($passfilename) { # Not allowed to create a new user!!
1712: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1713: &Reply($client, $result, $userinput);
1714: } else {
1715: &Failure($client, "non_authorized", $userinput); # Fail the user now.
1716: }
1717: }
1718: return 1;
1719: }
1720: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1721:
1722: #
1723: # Determines if this is the home server for a user. The home server
1724: # for a user will have his/her lon-capa passwd file. Therefore all we need
1725: # to do is determine if this file exists.
1726: #
1727: # Parameters:
1728: # $cmd - The command that got us here.
1729: # $tail - Tail of the command (remaining parameters).
1730: # $client - File descriptor connected to client.
1731: # Returns
1732: # 0 - Requested to exit, caller should shut down.
1733: # 1 - Continue processing.
1734: # Implicit inputs:
1735: # The authentication systems describe above have their own forms of implicit
1736: # input into the authentication process that are described above.
1737: #
1738: sub is_home_handler {
1739: my ($cmd, $tail, $client) = @_;
1740:
1741: my $userinput = "$cmd:$tail";
1742:
1743: my ($udom,$uname)=split(/:/,$tail);
1744: chomp($uname);
1745: my $passfile = &password_filename($udom, $uname);
1746: if($passfile) {
1747: &Reply( $client, "found\n", $userinput);
1748: } else {
1749: &Failure($client, "not_found\n", $userinput);
1750: }
1751: return 1;
1752: }
1753: ®ister_handler("home", \&is_home_handler, 0,1,0);
1754:
1755: #
1756: # Process an update request for a resource?? I think what's going on here is
1757: # that a resource has been modified that we hold a subscription to.
1758: # If the resource is not local, then we must update, or at least invalidate our
1759: # cached copy of the resource.
1760: # FUTURE WORK:
1761: # I need to look at this logic carefully. My druthers would be to follow
1762: # typical caching logic, and simple invalidate the cache, drop any subscription
1763: # an let the next fetch start the ball rolling again... however that may
1764: # actually be more difficult than it looks given the complex web of
1765: # proxy servers.
1766: # Parameters:
1767: # $cmd - The command that got us here.
1768: # $tail - Tail of the command (remaining parameters).
1769: # $client - File descriptor connected to client.
1770: # Returns
1771: # 0 - Requested to exit, caller should shut down.
1772: # 1 - Continue processing.
1773: # Implicit inputs:
1774: # The authentication systems describe above have their own forms of implicit
1775: # input into the authentication process that are described above.
1776: #
1777: sub update_resource_handler {
1778:
1779: my ($cmd, $tail, $client) = @_;
1780:
1781: my $userinput = "$cmd:$tail";
1782:
1783: my $fname= $tail; # This allows interactive testing
1784:
1785:
1786: my $ownership=ishome($fname);
1787: if ($ownership eq 'not_owner') {
1788: if (-e $fname) {
1789: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1790: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1791: my $now=time;
1792: my $since=$now-$atime;
1793: if ($since>$perlvar{'lonExpire'}) {
1794: my $reply=&reply("unsub:$fname","$clientname");
1795: unlink("$fname");
1796: } else {
1797: my $transname="$fname.in.transfer";
1798: my $remoteurl=&reply("sub:$fname","$clientname");
1799: my $response;
1800: alarm(120);
1801: {
1802: my $ua=new LWP::UserAgent;
1803: my $request=new HTTP::Request('GET',"$remoteurl");
1804: $response=$ua->request($request,$transname);
1805: }
1806: alarm(0);
1807: if ($response->is_error()) {
1808: unlink($transname);
1809: my $message=$response->status_line;
1810: &logthis("LWP GET: $message for $fname ($remoteurl)");
1811: } else {
1812: if ($remoteurl!~/\.meta$/) {
1813: alarm(120);
1814: {
1815: my $ua=new LWP::UserAgent;
1816: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1817: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1818: if ($mresponse->is_error()) {
1819: unlink($fname.'.meta');
1820: }
1821: }
1822: alarm(0);
1823: }
1824: rename($transname,$fname);
1825: }
1826: }
1827: &Reply( $client, "ok\n", $userinput);
1828: } else {
1829: &Failure($client, "not_found\n", $userinput);
1830: }
1831: } else {
1832: &Failure($client, "rejected\n", $userinput);
1833: }
1834: return 1;
1835: }
1836: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1837:
1838: #
1.226 foxr 1839: # Fetch a user file from a remote server to the user's home directory
1840: # userfiles subdir.
1.225 foxr 1841: # Parameters:
1842: # $cmd - The command that got us here.
1843: # $tail - Tail of the command (remaining parameters).
1844: # $client - File descriptor connected to client.
1845: # Returns
1846: # 0 - Requested to exit, caller should shut down.
1847: # 1 - Continue processing.
1848: #
1849: sub fetch_user_file_handler {
1850:
1851: my ($cmd, $tail, $client) = @_;
1852:
1853: my $userinput = "$cmd:$tail";
1854: my $fname = $tail;
1.232 foxr 1855: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1856: my $udir=&propath($udom,$uname).'/userfiles';
1857: unless (-e $udir) {
1858: mkdir($udir,0770);
1859: }
1.232 foxr 1860: Debug("fetch user file for $fname");
1.225 foxr 1861: if (-e $udir) {
1862: $ufile=~s/^[\.\~]+//;
1.232 foxr 1863:
1864: # IF necessary, create the path right down to the file.
1865: # Note that any regular files in the way of this path are
1866: # wiped out to deal with some earlier folly of mine.
1867:
1868: my $path = $udir;
1869: if ($ufile =~m|(.+)/([^/]+)$|) {
1870: my @parts=split('/',$1);
1871: foreach my $part (@parts) {
1872: $path .= '/'.$part;
1873: if( -f $path) {
1874: unlink($path);
1875: }
1876: if ((-e $path)!=1) {
1877: mkdir($path,0770);
1878: }
1879: }
1880: }
1881:
1882:
1.225 foxr 1883: my $destname=$udir.'/'.$ufile;
1884: my $transname=$udir.'/'.$ufile.'.in.transit';
1885: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1886: my $response;
1.232 foxr 1887: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1888: alarm(120);
1889: {
1890: my $ua=new LWP::UserAgent;
1891: my $request=new HTTP::Request('GET',"$remoteurl");
1892: $response=$ua->request($request,$transname);
1893: }
1894: alarm(0);
1895: if ($response->is_error()) {
1896: unlink($transname);
1897: my $message=$response->status_line;
1898: &logthis("LWP GET: $message for $fname ($remoteurl)");
1899: &Failure($client, "failed\n", $userinput);
1900: } else {
1.232 foxr 1901: Debug("Renaming $transname to $destname");
1.225 foxr 1902: if (!rename($transname,$destname)) {
1903: &logthis("Unable to move $transname to $destname");
1904: unlink($transname);
1905: &Failure($client, "failed\n", $userinput);
1906: } else {
1907: &Reply($client, "ok\n", $userinput);
1908: }
1909: }
1910: } else {
1911: &Failure($client, "not_home\n", $userinput);
1912: }
1913: return 1;
1914: }
1915: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1916:
1.226 foxr 1917: #
1918: # Remove a file from a user's home directory userfiles subdirectory.
1919: # Parameters:
1920: # cmd - the Lond request keyword that got us here.
1921: # tail - the part of the command past the keyword.
1922: # client- File descriptor connected with the client.
1923: #
1924: # Returns:
1925: # 1 - Continue processing.
1926:
1927: sub remove_user_file_handler {
1928: my ($cmd, $tail, $client) = @_;
1929:
1930: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1931:
1932: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1933: if ($ufile =~m|/\.\./|) {
1934: # any files paths with /../ in them refuse
1935: # to deal with
1936: &Failure($client, "refused\n", "$cmd:$tail");
1937: } else {
1938: my $udir = &propath($udom,$uname);
1939: if (-e $udir) {
1940: my $file=$udir.'/userfiles/'.$ufile;
1941: if (-e $file) {
1.240 banghart 1942: if (-f $file){
1.241 albertel 1943: unlink($file);
1944: } elsif(-d $file) {
1945: rmdir($file);
1.240 banghart 1946: }
1.226 foxr 1947: if (-e $file) {
1948: &Failure($client, "failed\n", "$cmd:$tail");
1949: } else {
1950: &Reply($client, "ok\n", "$cmd:$tail");
1951: }
1952: } else {
1953: &Failure($client, "not_found\n", "$cmd:$tail");
1954: }
1955: } else {
1956: &Failure($client, "not_home\n", "$cmd:$tail");
1957: }
1958: }
1959: return 1;
1960: }
1961: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
1962:
1.236 albertel 1963: #
1964: # make a directory in a user's home directory userfiles subdirectory.
1965: # Parameters:
1966: # cmd - the Lond request keyword that got us here.
1967: # tail - the part of the command past the keyword.
1968: # client- File descriptor connected with the client.
1969: #
1970: # Returns:
1971: # 1 - Continue processing.
1972:
1973: sub mkdir_user_file_handler {
1974: my ($cmd, $tail, $client) = @_;
1975:
1976: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1977: $dir=&unescape($dir);
1978: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
1979: if ($ufile =~m|/\.\./|) {
1980: # any files paths with /../ in them refuse
1981: # to deal with
1982: &Failure($client, "refused\n", "$cmd:$tail");
1983: } else {
1984: my $udir = &propath($udom,$uname);
1985: if (-e $udir) {
1986: my $newdir=$udir.'/userfiles/'.$ufile;
1987: if (!-e $newdir) {
1988: mkdir($newdir);
1989: if (!-e $newdir) {
1990: &Failure($client, "failed\n", "$cmd:$tail");
1991: } else {
1992: &Reply($client, "ok\n", "$cmd:$tail");
1993: }
1994: } else {
1995: &Failure($client, "not_found\n", "$cmd:$tail");
1996: }
1997: } else {
1998: &Failure($client, "not_home\n", "$cmd:$tail");
1999: }
2000: }
2001: return 1;
2002: }
2003: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2004:
1.237 albertel 2005: #
2006: # rename a file in a user's home directory userfiles subdirectory.
2007: # Parameters:
2008: # cmd - the Lond request keyword that got us here.
2009: # tail - the part of the command past the keyword.
2010: # client- File descriptor connected with the client.
2011: #
2012: # Returns:
2013: # 1 - Continue processing.
2014:
2015: sub rename_user_file_handler {
2016: my ($cmd, $tail, $client) = @_;
2017:
2018: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2019: $old=&unescape($old);
2020: $new=&unescape($new);
2021: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2022: # any files paths with /../ in them refuse to deal with
2023: &Failure($client, "refused\n", "$cmd:$tail");
2024: } else {
2025: my $udir = &propath($udom,$uname);
2026: if (-e $udir) {
2027: my $oldfile=$udir.'/userfiles/'.$old;
2028: my $newfile=$udir.'/userfiles/'.$new;
2029: if (-e $newfile) {
2030: &Failure($client, "exists\n", "$cmd:$tail");
2031: } elsif (! -e $oldfile) {
2032: &Failure($client, "not_found\n", "$cmd:$tail");
2033: } else {
2034: if (!rename($oldfile,$newfile)) {
2035: &Failure($client, "failed\n", "$cmd:$tail");
2036: } else {
2037: &Reply($client, "ok\n", "$cmd:$tail");
2038: }
2039: }
2040: } else {
2041: &Failure($client, "not_home\n", "$cmd:$tail");
2042: }
2043: }
2044: return 1;
2045: }
2046: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2047:
1.227 foxr 2048:
2049: #
2050: # Authenticate access to a user file by checking the user's
2051: # session token(?)
2052: #
2053: # Parameters:
2054: # cmd - The request keyword that dispatched to tus.
2055: # tail - The tail of the request (colon separated parameters).
2056: # client - Filehandle open on the client.
2057: # Return:
2058: # 1.
2059:
2060: sub token_auth_user_file_handler {
2061: my ($cmd, $tail, $client) = @_;
2062:
2063: my ($fname, $session) = split(/:/, $tail);
2064:
2065: chomp($session);
2066: my $reply='non_auth';
2067: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2068: $session.'.id')) {
2069: while (my $line=<ENVIN>) {
2070: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
2071: }
2072: close(ENVIN);
2073: &Reply($client, $reply);
2074: } else {
2075: &Failure($client, "invalid_token\n", "$cmd:$tail");
2076: }
2077: return 1;
2078:
2079: }
2080:
2081: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2082:
2083:
2084: #
2085: # Unsubscribe from a resource.
2086: #
2087: # Parameters:
2088: # $cmd - The command that got us here.
2089: # $tail - Tail of the command (remaining parameters).
2090: # $client - File descriptor connected to client.
2091: # Returns
2092: # 0 - Requested to exit, caller should shut down.
2093: # 1 - Continue processing.
2094: #
2095: sub unsubscribe_handler {
2096: my ($cmd, $tail, $client) = @_;
2097:
2098: my $userinput= "$cmd:$tail";
2099:
2100: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2101:
2102: &Debug("Unsubscribing $fname");
2103: if (-e $fname) {
2104: &Debug("Exists");
2105: &Reply($client, &unsub($fname,$clientip), $userinput);
2106: } else {
2107: &Failure($client, "not_found\n", $userinput);
2108: }
2109: return 1;
2110: }
2111: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.230 foxr 2112: # Subscribe to a resource
2113: #
2114: # Parameters:
2115: # $cmd - The command that got us here.
2116: # $tail - Tail of the command (remaining parameters).
2117: # $client - File descriptor connected to client.
2118: # Returns
2119: # 0 - Requested to exit, caller should shut down.
2120: # 1 - Continue processing.
2121: #
2122: sub subscribe_handler {
2123: my ($cmd, $tail, $client)= @_;
2124:
2125: my $userinput = "$cmd:$tail";
2126:
2127: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2128:
2129: return 1;
2130: }
2131: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2132:
2133: #
2134: # Determine the version of a resource (?) Or is it return
2135: # the top version of the resource? Not yet clear from the
2136: # code in currentversion.
2137: #
2138: # Parameters:
2139: # $cmd - The command that got us here.
2140: # $tail - Tail of the command (remaining parameters).
2141: # $client - File descriptor connected to client.
2142: # Returns
2143: # 0 - Requested to exit, caller should shut down.
2144: # 1 - Continue processing.
2145: #
2146: sub current_version_handler {
2147: my ($cmd, $tail, $client) = @_;
2148:
2149: my $userinput= "$cmd:$tail";
2150:
2151: my $fname = $tail;
2152: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2153: return 1;
2154:
2155: }
2156: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2157:
2158: # Make an entry in a user's activity log.
2159: #
2160: # Parameters:
2161: # $cmd - The command that got us here.
2162: # $tail - Tail of the command (remaining parameters).
2163: # $client - File descriptor connected to client.
2164: # Returns
2165: # 0 - Requested to exit, caller should shut down.
2166: # 1 - Continue processing.
2167: #
2168: sub activity_log_handler {
2169: my ($cmd, $tail, $client) = @_;
2170:
2171:
2172: my $userinput= "$cmd:$tail";
2173:
2174: my ($udom,$uname,$what)=split(/:/,$tail);
2175: chomp($what);
2176: my $proname=&propath($udom,$uname);
2177: my $now=time;
2178: my $hfh;
2179: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2180: print $hfh "$now:$clientname:$what\n";
2181: &Reply( $client, "ok\n", $userinput);
2182: } else {
2183: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2184: ."while attempting log\n",
2185: $userinput);
2186: }
2187:
2188: return 1;
2189: }
2190: register_handler("log", \&activity_log_handler, 0, 1, 0);
2191:
2192: #
2193: # Put a namespace entry in a user profile hash.
2194: # My druthers would be for this to be an encrypted interaction too.
2195: # anything that might be an inadvertent covert channel about either
2196: # user authentication or user personal information....
2197: #
2198: # Parameters:
2199: # $cmd - The command that got us here.
2200: # $tail - Tail of the command (remaining parameters).
2201: # $client - File descriptor connected to client.
2202: # Returns
2203: # 0 - Requested to exit, caller should shut down.
2204: # 1 - Continue processing.
2205: #
2206: sub put_user_profile_entry {
2207: my ($cmd, $tail, $client) = @_;
1.229 foxr 2208:
1.230 foxr 2209: my $userinput = "$cmd:$tail";
2210:
1.242 raeburn 2211: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2212: if ($namespace ne 'roles') {
2213: chomp($what);
2214: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2215: &GDBM_WRCREAT(),"P",$what);
2216: if($hashref) {
2217: my @pairs=split(/\&/,$what);
2218: foreach my $pair (@pairs) {
2219: my ($key,$value)=split(/=/,$pair);
2220: $hashref->{$key}=$value;
2221: }
2222: if (untie(%$hashref)) {
2223: &Reply( $client, "ok\n", $userinput);
2224: } else {
2225: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2226: "while attempting put\n",
2227: $userinput);
2228: }
2229: } else {
2230: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2231: "while attempting put\n", $userinput);
2232: }
2233: } else {
2234: &Failure( $client, "refused\n", $userinput);
2235: }
2236:
2237: return 1;
2238: }
2239: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2240:
2241: #
2242: # Increment a profile entry in the user history file.
2243: # The history contains keyword value pairs. In this case,
2244: # The value itself is a pair of numbers. The first, the current value
2245: # the second an increment that this function applies to the current
2246: # value.
2247: #
2248: # Parameters:
2249: # $cmd - The command that got us here.
2250: # $tail - Tail of the command (remaining parameters).
2251: # $client - File descriptor connected to client.
2252: # Returns
2253: # 0 - Requested to exit, caller should shut down.
2254: # 1 - Continue processing.
2255: #
2256: sub increment_user_value_handler {
2257: my ($cmd, $tail, $client) = @_;
2258:
2259: my $userinput = "$cmd:$tail";
2260:
2261: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2262: if ($namespace ne 'roles') {
2263: chomp($what);
2264: my $hashref = &tie_user_hash($udom, $uname,
2265: $namespace, &GDBM_WRCREAT(),
2266: "P",$what);
2267: if ($hashref) {
2268: my @pairs=split(/\&/,$what);
2269: foreach my $pair (@pairs) {
2270: my ($key,$value)=split(/=/,$pair);
2271: # We could check that we have a number...
2272: if (! defined($value) || $value eq '') {
2273: $value = 1;
2274: }
2275: $hashref->{$key}+=$value;
2276: }
2277: if (untie(%$hashref)) {
2278: &Reply( $client, "ok\n", $userinput);
2279: } else {
2280: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2281: "while attempting inc\n", $userinput);
2282: }
2283: } else {
2284: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2285: "while attempting inc\n", $userinput);
2286: }
2287: } else {
2288: &Failure($client, "refused\n", $userinput);
2289: }
2290:
2291: return 1;
2292: }
2293: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2294:
2295:
2296: #
2297: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2298: # Each 'role' a user has implies a set of permissions. Adding a new role
2299: # for a person grants the permissions packaged with that role
2300: # to that user when the role is selected.
2301: #
2302: # Parameters:
2303: # $cmd - The command string (rolesput).
2304: # $tail - The remainder of the request line. For rolesput this
2305: # consists of a colon separated list that contains:
2306: # The domain and user that is granting the role (logged).
2307: # The domain and user that is getting the role.
2308: # The roles being granted as a set of & separated pairs.
2309: # each pair a key value pair.
2310: # $client - File descriptor connected to the client.
2311: # Returns:
2312: # 0 - If the daemon should exit
2313: # 1 - To continue processing.
2314: #
2315: #
2316: sub roles_put_handler {
2317: my ($cmd, $tail, $client) = @_;
2318:
2319: my $userinput = "$cmd:$tail";
2320:
2321: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2322:
2323:
2324: my $namespace='roles';
2325: chomp($what);
2326: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2327: &GDBM_WRCREAT(), "P",
2328: "$exedom:$exeuser:$what");
2329: #
2330: # Log the attempt to set a role. The {}'s here ensure that the file
2331: # handle is open for the minimal amount of time. Since the flush
2332: # is done on close this improves the chances the log will be an un-
2333: # corrupted ordered thing.
2334: if ($hashref) {
2335: my @pairs=split(/\&/,$what);
2336: foreach my $pair (@pairs) {
2337: my ($key,$value)=split(/=/,$pair);
2338: &manage_permissions($key, $udom, $uname,
2339: &get_auth_type( $udom, $uname));
2340: $hashref->{$key}=$value;
2341: }
2342: if (untie($hashref)) {
2343: &Reply($client, "ok\n", $userinput);
2344: } else {
2345: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2346: "while attempting rolesput\n", $userinput);
2347: }
2348: } else {
2349: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2350: "while attempting rolesput\n", $userinput);
2351: }
2352: return 1;
2353: }
2354: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2355:
2356: #
1.231 foxr 2357: # Deletes (removes) a role for a user. This is equivalent to removing
2358: # a permissions package associated with the role from the user's profile.
2359: #
2360: # Parameters:
2361: # $cmd - The command (rolesdel)
2362: # $tail - The remainder of the request line. This consists
2363: # of:
2364: # The domain and user requesting the change (logged)
2365: # The domain and user being changed.
2366: # The roles being revoked. These are shipped to us
2367: # as a bunch of & separated role name keywords.
2368: # $client - The file handle open on the client.
2369: # Returns:
2370: # 1 - Continue processing
2371: # 0 - Exit.
2372: #
2373: sub roles_delete_handler {
2374: my ($cmd, $tail, $client) = @_;
2375:
2376: my $userinput = "$cmd:$tail";
2377:
2378: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2379: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2380: "what = ".$what);
2381: my $namespace='roles';
2382: chomp($what);
2383: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2384: &GDBM_WRCREAT(), "D",
2385: "$exedom:$exeuser:$what");
2386:
2387: if ($hashref) {
2388: my @rolekeys=split(/\&/,$what);
2389:
2390: foreach my $key (@rolekeys) {
2391: delete $hashref->{$key};
2392: }
2393: if (untie(%$hashref)) {
2394: &Reply($client, "ok\n", $userinput);
2395: } else {
2396: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2397: "while attempting rolesdel\n", $userinput);
2398: }
2399: } else {
2400: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2401: "while attempting rolesdel\n", $userinput);
2402: }
2403:
2404: return 1;
2405: }
2406: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2407:
2408: # Unencrypted get from a user's profile database. See
2409: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2410: # This function retrieves a keyed item from a specific named database in the
2411: # user's directory.
2412: #
2413: # Parameters:
2414: # $cmd - Command request keyword (get).
2415: # $tail - Tail of the command. This is a colon separated list
2416: # consisting of the domain and username that uniquely
2417: # identifies the profile,
2418: # The 'namespace' which selects the gdbm file to
2419: # do the lookup in,
2420: # & separated list of keys to lookup. Note that
2421: # the values are returned as an & separated list too.
2422: # $client - File descriptor open on the client.
2423: # Returns:
2424: # 1 - Continue processing.
2425: # 0 - Exit.
2426: #
2427: sub get_profile_entry {
2428: my ($cmd, $tail, $client) = @_;
2429:
2430: my $userinput= "$cmd:$tail";
2431:
2432: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2433: chomp($what);
2434: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2435: &GDBM_READER());
2436: if ($hashref) {
2437: my @queries=split(/\&/,$what);
2438: my $qresult='';
2439:
2440: for (my $i=0;$i<=$#queries;$i++) {
2441: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
2442: }
2443: $qresult=~s/\&$//; # Remove trailing & from last lookup.
2444: if (untie(%$hashref)) {
2445: &Reply($client, "$qresult\n", $userinput);
2446: } else {
2447: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2448: "while attempting get\n", $userinput);
2449: }
2450: } else {
2451: if ($!+0 == 2) { # +0 coerces errno -> number 2 is ENOENT
2452: &Failure($client, "error:No such file or ".
2453: "GDBM reported bad block error\n", $userinput);
2454: } else { # Some other undifferentiated err.
2455: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2456: "while attempting get\n", $userinput);
2457: }
2458: }
2459: return 1;
2460: }
2461: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2462:
2463: #
2464: # Process the encrypted get request. Note that the request is sent
2465: # in clear, but the reply is encrypted. This is a small covert channel:
2466: # information about the sensitive keys is given to the snooper. Just not
2467: # information about the values of the sensitive key. Hmm if I wanted to
2468: # know these I'd snoop for the egets. Get the profile item names from them
2469: # and then issue a get for them since there's no enforcement of the
2470: # requirement of an encrypted get for particular profile items. If I
2471: # were re-doing this, I'd force the request to be encrypted as well as the
2472: # reply. I'd also just enforce encrypted transactions for all gets since
2473: # that would prevent any covert channel snooping.
2474: #
2475: # Parameters:
2476: # $cmd - Command keyword of request (eget).
2477: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2478: # $client - File open on the client.
2479: # Returns:
2480: # 1 - Continue processing
2481: # 0 - server should exit.
2482: sub get_profile_entry_encrypted {
2483: my ($cmd, $tail, $client) = @_;
2484:
2485: my $userinput = "$cmd:$tail";
2486:
2487: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2488: chomp($what);
2489: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2490: &GDBM_READER());
2491: if ($hashref) {
2492: my @queries=split(/\&/,$what);
2493: my $qresult='';
2494: for (my $i=0;$i<=$#queries;$i++) {
2495: $qresult.="$hashref->{$queries[$i]}&";
2496: }
2497: if (untie(%$hashref)) {
2498: $qresult=~s/\&$//;
2499: if ($cipher) {
2500: my $cmdlength=length($qresult);
2501: $qresult.=" ";
2502: my $encqresult='';
2503: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2504: $encqresult.= unpack("H16",
2505: $cipher->encrypt(substr($qresult,
2506: $encidx,
2507: 8)));
2508: }
2509: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2510: } else {
2511: &Failure( $client, "error:no_key\n", $userinput);
2512: }
2513: } else {
2514: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2515: "while attempting eget\n", $userinput);
2516: }
2517: } else {
2518: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2519: "while attempting eget\n", $userinput);
2520: }
2521:
2522: return 1;
2523: }
2524: ®ister_handler("eget", \&GetProfileEntryEncrypted, 0, 1, 0);
2525: #
2526: # Deletes a key in a user profile database.
2527: #
2528: # Parameters:
2529: # $cmd - Command keyword (del).
2530: # $tail - Command tail. IN this case a colon
2531: # separated list containing:
2532: # The domain and user that identifies uniquely
2533: # the identity of the user.
2534: # The profile namespace (name of the profile
2535: # database file).
2536: # & separated list of keywords to delete.
2537: # $client - File open on client socket.
2538: # Returns:
2539: # 1 - Continue processing
2540: # 0 - Exit server.
2541: #
2542: #
2543:
2544: sub delete_profile_entry {
2545: my ($cmd, $tail, $client) = @_;
2546:
2547: my $userinput = "cmd:$tail";
2548:
2549: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2550: chomp($what);
2551: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2552: &GDBM_WRCREAT(),
2553: "D",$what);
2554: if ($hashref) {
2555: my @keys=split(/\&/,$what);
2556: foreach my $key (@keys) {
2557: delete($hashref->{$key});
2558: }
2559: if (untie(%$hashref)) {
2560: &Reply($client, "ok\n", $userinput);
2561: } else {
2562: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2563: "while attempting del\n", $userinput);
2564: }
2565: } else {
2566: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2567: "while attempting del\n", $userinput);
2568: }
2569: return 1;
2570: }
2571: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2572: #
2573: # List the set of keys that are defined in a profile database file.
2574: # A successful reply from this will contain an & separated list of
2575: # the keys.
2576: # Parameters:
2577: # $cmd - Command request (keys).
2578: # $tail - Remainder of the request, a colon separated
2579: # list containing domain/user that identifies the
2580: # user being queried, and the database namespace
2581: # (database filename essentially).
2582: # $client - File open on the client.
2583: # Returns:
2584: # 1 - Continue processing.
2585: # 0 - Exit the server.
2586: #
2587: sub get_profile_keys {
2588: my ($cmd, $tail, $client) = @_;
2589:
2590: my $userinput = "$cmd:$tail";
2591:
2592: my ($udom,$uname,$namespace)=split(/:/,$tail);
2593: my $qresult='';
2594: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2595: &GDBM_READER());
2596: if ($hashref) {
2597: foreach my $key (keys %$hashref) {
2598: $qresult.="$key&";
2599: }
2600: if (untie(%$hashref)) {
2601: $qresult=~s/\&$//;
2602: &Reply($client, "$qresult\n", $userinput);
2603: } else {
2604: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2605: "while attempting keys\n", $userinput);
2606: }
2607: } else {
2608: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2609: "while attempting keys\n", $userinput);
2610: }
2611:
2612: return 1;
2613: }
2614: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2615:
2616: #
2617: # Dump the contents of a user profile database.
2618: # Note that this constitutes a very large covert channel too since
2619: # the dump will return sensitive information that is not encrypted.
2620: # The naive security assumption is that the session negotiation ensures
2621: # our client is trusted and I don't believe that's assured at present.
2622: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2623: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2624: #
2625: # Parameters:
2626: # $cmd - The command request keyword (currentdump).
2627: # $tail - Remainder of the request, consisting of a colon
2628: # separated list that has the domain/username and
2629: # the namespace to dump (database file).
2630: # $client - file open on the remote client.
2631: # Returns:
2632: # 1 - Continue processing.
2633: # 0 - Exit the server.
2634: #
2635: sub dump_profile_database {
2636: my ($cmd, $tail, $client) = @_;
2637:
2638: my $userinput = "$cmd:$tail";
2639:
2640: my ($udom,$uname,$namespace) = split(/:/,$tail);
2641: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2642: &GDBM_READER());
2643: if ($hashref) {
2644: # Structure of %data:
2645: # $data{$symb}->{$parameter}=$value;
2646: # $data{$symb}->{'v.'.$parameter}=$version;
2647: # since $parameter will be unescaped, we do not
2648: # have to worry about silly parameter names...
2649:
2650: my $qresult='';
2651: my %data = (); # A hash of anonymous hashes..
2652: while (my ($key,$value) = each(%$hashref)) {
2653: my ($v,$symb,$param) = split(/:/,$key);
2654: next if ($v eq 'version' || $symb eq 'keys');
2655: next if (exists($data{$symb}) &&
2656: exists($data{$symb}->{$param}) &&
2657: $data{$symb}->{'v.'.$param} > $v);
2658: $data{$symb}->{$param}=$value;
2659: $data{$symb}->{'v.'.$param}=$v;
2660: }
2661: if (untie(%$hashref)) {
2662: while (my ($symb,$param_hash) = each(%data)) {
2663: while(my ($param,$value) = each (%$param_hash)){
2664: next if ($param =~ /^v\./); # Ignore versions...
2665: #
2666: # Just dump the symb=value pairs separated by &
2667: #
2668: $qresult.=$symb.':'.$param.'='.$value.'&';
2669: }
2670: }
2671: chop($qresult);
2672: &Reply($client , "$qresult\n", $userinput);
2673: } else {
2674: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2675: "while attempting currentdump\n", $userinput);
2676: }
2677: } else {
2678: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2679: "while attempting currentdump\n", $userinput);
2680: }
2681:
2682: return 1;
2683: }
2684: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2685:
2686: #
2687: # Dump a profile database with an optional regular expression
2688: # to match against the keys. In this dump, no effort is made
2689: # to separate symb from version information. Presumably the
2690: # databases that are dumped by this command are of a different
2691: # structure. Need to look at this and improve the documentation of
2692: # both this and the currentdump handler.
2693: # Parameters:
2694: # $cmd - The command keyword.
2695: # $tail - All of the characters after the $cmd:
2696: # These are expected to be a colon
2697: # separated list containing:
2698: # domain/user - identifying the user.
2699: # namespace - identifying the database.
2700: # regexp - optional regular expression
2701: # that is matched against
2702: # database keywords to do
2703: # selective dumps.
2704: # $client - Channel open on the client.
2705: # Returns:
2706: # 1 - Continue processing.
2707: # Side effects:
2708: # response is written to $client.
2709: #
2710: sub dump_with_regexp {
2711: my ($cmd, $tail, $client) = @_;
2712:
2713:
2714: my $userinput = "$cmd:$tail";
2715:
2716: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
2717: if (defined($regexp)) {
2718: $regexp=&unescape($regexp);
2719: } else {
2720: $regexp='.';
2721: }
2722: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2723: &GDBM_READER());
2724: if ($hashref) {
2725: my $qresult='';
2726: while (my ($key,$value) = each(%$hashref)) {
2727: if ($regexp eq '.') {
2728: $qresult.=$key.'='.$value.'&';
2729: } else {
2730: my $unescapeKey = &unescape($key);
2731: if (eval('$unescapeKey=~/$regexp/')) {
2732: $qresult.="$key=$value&";
2733: }
2734: }
2735: }
2736: if (untie(%$hashref)) {
2737: chop($qresult);
2738: &Reply($client, "$qresult\n", $userinput);
2739: } else {
2740: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2741: "while attempting dump\n", $userinput);
2742: }
2743: } else {
2744: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2745: "while attempting dump\n", $userinput);
2746: }
2747:
2748: return 1;
2749: }
2750:
2751: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2752:
2753: # Store a set of key=value pairs associated with a versioned name.
2754: #
2755: # Parameters:
2756: # $cmd - Request command keyword.
2757: # $tail - Tail of the request. This is a colon
2758: # separated list containing:
2759: # domain/user - User and authentication domain.
2760: # namespace - Name of the database being modified
2761: # rid - Resource keyword to modify.
2762: # what - new value associated with rid.
2763: #
2764: # $client - Socket open on the client.
2765: #
2766: #
2767: # Returns:
2768: # 1 (keep on processing).
2769: # Side-Effects:
2770: # Writes to the client
2771: sub store_handler {
2772: my ($cmd, $tail, $client) = @_;
2773:
2774: my $userinput = "$cmd:$tail";
2775:
2776: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2777: if ($namespace ne 'roles') {
2778:
2779: chomp($what);
2780: my @pairs=split(/\&/,$what);
2781: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2782: &GDBM_WRCREAT(), "P",
2783: "$rid:$what");
2784: if ($hashref) {
2785: my $now = time;
2786: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2787: my $key;
2788: $hashref->{"version:$rid"}++;
2789: my $version=$hashref->{"version:$rid"};
2790: my $allkeys='';
2791: foreach my $pair (@pairs) {
2792: my ($key,$value)=split(/=/,$pair);
2793: $allkeys.=$key.':';
2794: $hashref->{"$version:$rid:$key"}=$value;
2795: }
2796: $hashref->{"$version:$rid:timestamp"}=$now;
2797: $allkeys.='timestamp';
2798: $hashref->{"$version:keys:$rid"}=$allkeys;
2799: if (untie($hashref)) {
2800: &Reply($client, "ok\n", $userinput);
2801: } else {
2802: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2803: "while attempting store\n", $userinput);
2804: }
2805: } else {
2806: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2807: "while attempting store\n", $userinput);
2808: }
2809: } else {
2810: &Failure($client, "refused\n", $userinput);
2811: }
2812:
2813: return 1;
2814: }
2815: ®ister_handler("store", \&store_handler, 0, 1, 0);
2816: #
2817: # Dump out all versions of a resource that has key=value pairs associated
2818: # with it for each version. These resources are built up via the store
2819: # command.
2820: #
2821: # Parameters:
2822: # $cmd - Command keyword.
2823: # $tail - Remainder of the request which consists of:
2824: # domain/user - User and auth. domain.
2825: # namespace - name of resource database.
2826: # rid - Resource id.
2827: # $client - socket open on the client.
2828: #
2829: # Returns:
2830: # 1 indicating the caller should not yet exit.
2831: # Side-effects:
2832: # Writes a reply to the client.
2833: # The reply is a string of the following shape:
2834: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
2835: # Where the 1 above represents version 1.
2836: # this continues for all pairs of keys in all versions.
2837: #
2838: #
2839: #
2840: #
2841: sub restore_handler {
2842: my ($cmd, $tail, $client) = @_;
2843:
2844: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
2845:
2846: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
2847: $namespace=~s/\//\_/g;
2848: $namespace=~s/\W//g;
2849: chomp($rid);
2850: my $proname=&propath($udom,$uname);
2851: my $qresult='';
2852: my %hash;
2853: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2854: &GDBM_READER(),0640)) {
2855: my $version=$hash{"version:$rid"};
2856: $qresult.="version=$version&";
2857: my $scope;
2858: for ($scope=1;$scope<=$version;$scope++) {
2859: my $vkeys=$hash{"$scope:keys:$rid"};
2860: my @keys=split(/:/,$vkeys);
2861: my $key;
2862: $qresult.="$scope:keys=$vkeys&";
2863: foreach $key (@keys) {
2864: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2865: }
2866: }
2867: if (untie(%hash)) {
2868: $qresult=~s/\&$//;
2869: &Reply( $client, "$qresult\n", $userinput);
2870: } else {
2871: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2872: "while attempting restore\n", $userinput);
2873: }
2874: } else {
2875: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2876: "while attempting restore\n", $userinput);
2877: }
2878:
2879: return 1;
2880:
2881:
2882: }
2883: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 2884:
2885: #
2886: # Add a chat message to to a discussion board.
2887: #
2888: # Parameters:
2889: # $cmd - Request keyword.
2890: # $tail - Tail of the command. A colon separated list
2891: # containing:
2892: # cdom - Domain on which the chat board lives
2893: # cnum - Identifier of the discussion group.
2894: # post - Body of the posting.
2895: # $client - Socket open on the client.
2896: # Returns:
2897: # 1 - Indicating caller should keep on processing.
2898: #
2899: # Side-effects:
2900: # writes a reply to the client.
2901: #
2902: #
2903: sub send_chat_handler {
2904: my ($cmd, $tail, $client) = @_;
2905:
2906:
2907: my $userinput = "$cmd:$tail";
2908:
2909: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2910: &chat_add($cdom,$cnum,$newpost);
2911: &Reply($client, "ok\n", $userinput);
2912:
2913: return 1;
2914: }
2915: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
2916: #
2917: # Retrieve the set of chat messagss from a discussion board.
2918: #
2919: # Parameters:
2920: # $cmd - Command keyword that initiated the request.
2921: # $tail - Remainder of the request after the command
2922: # keyword. In this case a colon separated list of
2923: # chat domain - Which discussion board.
2924: # chat id - Discussion thread(?)
2925: # domain/user - Authentication domain and username
2926: # of the requesting person.
2927: # $client - Socket open on the client program.
2928: # Returns:
2929: # 1 - continue processing
2930: # Side effects:
2931: # Response is written to the client.
2932: #
2933: sub retrieve_chat_handler {
2934: my ($cmd, $tail, $client) = @_;
2935:
2936:
2937: my $userinput = "$cmd:$tail";
2938:
2939: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
2940: my $reply='';
2941: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
2942: $reply.=&escape($_).':';
2943: }
2944: $reply=~s/\:$//;
2945: &Reply($client, $reply."\n", $userinput);
2946:
2947:
2948: return 1;
2949: }
2950: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
2951:
2952: #
2953: # Initiate a query of an sql database. SQL query repsonses get put in
2954: # a file for later retrieval. This prevents sql query results from
2955: # bottlenecking the system. Note that with loncnew, perhaps this is
2956: # less of an issue since multiple outstanding requests can be concurrently
2957: # serviced.
2958: #
2959: # Parameters:
2960: # $cmd - COmmand keyword that initiated the request.
2961: # $tail - Remainder of the command after the keyword.
2962: # For this function, this consists of a query and
2963: # 3 arguments that are self-documentingly labelled
2964: # in the original arg1, arg2, arg3.
2965: # $client - Socket open on the client.
2966: # Return:
2967: # 1 - Indicating processing should continue.
2968: # Side-effects:
2969: # a reply is written to $client.
2970: #
2971: sub send_query_handler {
2972: my ($cmd, $tail, $client) = @_;
2973:
2974:
2975: my $userinput = "$cmd:$tail";
2976:
2977: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
2978: $query=~s/\n*$//g;
2979: &Reply($client, "". &sql_reply("$clientname\&$query".
2980: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
2981: $userinput);
2982:
2983: return 1;
2984: }
2985: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
2986:
2987: #
2988: # Add a reply to an sql query. SQL queries are done asyncrhonously.
2989: # The query is submitted via a "querysend" transaction.
2990: # There it is passed on to the lonsql daemon, queued and issued to
2991: # mysql.
2992: # This transaction is invoked when the sql transaction is complete
2993: # it stores the query results in flie and indicates query completion.
2994: # presumably local software then fetches this response... I'm guessing
2995: # the sequence is: lonc does a querysend, we ask lonsql to do it.
2996: # lonsql on completion of the query interacts with the lond of our
2997: # client to do a query reply storing two files:
2998: # - id - The results of the query.
2999: # - id.end - Indicating the transaction completed.
3000: # NOTE: id is a unique id assigned to the query and querysend time.
3001: # Parameters:
3002: # $cmd - Command keyword that initiated this request.
3003: # $tail - Remainder of the tail. In this case that's a colon
3004: # separated list containing the query Id and the
3005: # results of the query.
3006: # $client - Socket open on the client.
3007: # Return:
3008: # 1 - Indicating that we should continue processing.
3009: # Side effects:
3010: # ok written to the client.
3011: #
3012: sub reply_query_handler {
3013: my ($cmd, $tail, $client) = @_;
3014:
3015:
3016: my $userinput = "$cmd:$tail";
3017:
3018: my ($cmd,$id,$reply)=split(/:/,$userinput);
3019: my $store;
3020: my $execdir=$perlvar{'lonDaemons'};
3021: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3022: $reply=~s/\&/\n/g;
3023: print $store $reply;
3024: close $store;
3025: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3026: print $store2 "done\n";
3027: close $store2;
3028: &Reply($client, "ok\n", $userinput);
3029: } else {
3030: &Failure($client, "error: ".($!+0)
3031: ." IO::File->new Failed ".
3032: "while attempting queryreply\n", $userinput);
3033: }
3034:
3035:
3036: return 1;
3037: }
3038: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3039:
3040: #
3041: # Process the courseidput request. Not quite sure what this means
3042: # at the system level sense. It appears a gdbm file in the
3043: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3044: # a set of entries made in that database.
3045: #
3046: # Parameters:
3047: # $cmd - The command keyword that initiated this request.
3048: # $tail - Tail of the command. In this case consists of a colon
3049: # separated list contaning the domain to apply this to and
3050: # an ampersand separated list of keyword=value pairs.
3051: # $client - Socket open on the client.
3052: # Returns:
3053: # 1 - indicating that processing should continue
3054: #
3055: # Side effects:
3056: # reply is written to the client.
3057: #
3058: sub put_course_id_handler {
3059: my ($cmd, $tail, $client) = @_;
3060:
3061:
3062: my $userinput = "$cmd:$tail";
3063:
3064: my ($udom, $what) = split(/:/, $tail);
3065: chomp($what);
3066: my $now=time;
3067: my @pairs=split(/\&/,$what);
3068:
3069: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3070: if ($hashref) {
3071: foreach my $pair (@pairs) {
3072: my ($key,$value)=split(/=/,$pair);
3073: $hashref->{$key}=$value.':'.$now;
3074: }
3075: if (untie(%$hashref)) {
3076: &Reply($client, "ok\n", $userinput);
3077: } else {
3078: &Failure( $client, "error: ".($!+0)
3079: ." untie(GDBM) Failed ".
3080: "while attempting courseidput\n", $userinput);
3081: }
3082: } else {
3083: &Failure( $client, "error: ".($!+0)
3084: ." tie(GDBM) Failed ".
3085: "while attempting courseidput\n", $userinput);
3086: }
3087:
3088: return 1;
3089: }
3090: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3091:
3092: # Retrieves the value of a course id resource keyword pattern
3093: # defined since a starting date. Both the starting date and the
3094: # keyword pattern are optional. If the starting date is not supplied it
3095: # is treated as the beginning of time. If the pattern is not found,
3096: # it is treatred as "." matching everything.
3097: #
3098: # Parameters:
3099: # $cmd - Command keyword that resulted in us being dispatched.
3100: # $tail - The remainder of the command that, in this case, consists
3101: # of a colon separated list of:
3102: # domain - The domain in which the course database is
3103: # defined.
3104: # since - Optional parameter describing the minimum
3105: # time of definition(?) of the resources that
3106: # will match the dump.
3107: # description - regular expression that is used to filter
3108: # the dump. Only keywords matching this regexp
3109: # will be used.
3110: # $client - The socket open on the client.
3111: # Returns:
3112: # 1 - Continue processing.
3113: # Side Effects:
3114: # a reply is written to $client.
3115: sub dump_course_id_handler {
3116: my ($cmd, $tail, $client) = @_;
3117:
3118: my $userinput = "$cmd:$tail";
3119:
3120: my ($udom,$since,$description) =split(/:/,$tail);
3121: if (defined($description)) {
3122: $description=&unescape($description);
3123: } else {
3124: $description='.';
3125: }
3126: unless (defined($since)) { $since=0; }
3127: my $qresult='';
3128: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3129: if ($hashref) {
3130: while (my ($key,$value) = each(%$hashref)) {
3131: my ($descr,$lasttime,$inst_code);
3132: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
3133: ($descr,$inst_code,$lasttime)=($1,$2,$3);
3134: } else {
3135: ($descr,$lasttime) = split(/\:/,$value);
3136: }
3137: if ($lasttime<$since) { next; }
3138: if ($description eq '.') {
3139: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3140: } else {
3141: my $unescapeVal = &unescape($descr);
3142: if (eval('$unescapeVal=~/\Q$description\E/i')) {
3143: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3144: }
3145: }
3146: }
3147: if (untie(%$hashref)) {
3148: chop($qresult);
3149: &Reply($client, "$qresult\n", $userinput);
3150: } else {
3151: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3152: "while attempting courseiddump\n", $userinput);
3153: }
3154: } else {
3155: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3156: "while attempting courseiddump\n", $userinput);
3157: }
3158:
3159:
3160: return 1;
3161: }
3162: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3163:
3164: #
3165: # Puts an id to a domains id database.
3166: #
3167: # Parameters:
3168: # $cmd - The command that triggered us.
3169: # $tail - Remainder of the request other than the command. This is a
3170: # colon separated list containing:
3171: # $domain - The domain for which we are writing the id.
3172: # $pairs - The id info to write... this is and & separated list
3173: # of keyword=value.
3174: # $client - Socket open on the client.
3175: # Returns:
3176: # 1 - Continue processing.
3177: # Side effects:
3178: # reply is written to $client.
3179: #
3180: sub put_id_handler {
3181: my ($cmd,$tail,$client) = @_;
3182:
3183:
3184: my $userinput = "$cmd:$tail";
3185:
3186: my ($udom,$what)=split(/:/,$tail);
3187: chomp($what);
3188: my @pairs=split(/\&/,$what);
3189: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3190: "P", $what);
3191: if ($hashref) {
3192: foreach my $pair (@pairs) {
3193: my ($key,$value)=split(/=/,$pair);
3194: $hashref->{$key}=$value;
3195: }
3196: if (untie(%$hashref)) {
3197: &Reply($client, "ok\n", $userinput);
3198: } else {
3199: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3200: "while attempting idput\n", $userinput);
3201: }
3202: } else {
3203: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3204: "while attempting idput\n", $userinput);
3205: }
3206:
3207: return 1;
3208: }
3209:
3210: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
3211: #
3212: # Retrieves a set of id values from the id database.
3213: # Returns an & separated list of results, one for each requested id to the
3214: # client.
3215: #
3216: # Parameters:
3217: # $cmd - Command keyword that caused us to be dispatched.
3218: # $tail - Tail of the command. Consists of a colon separated:
3219: # domain - the domain whose id table we dump
3220: # ids Consists of an & separated list of
3221: # id keywords whose values will be fetched.
3222: # nonexisting keywords will have an empty value.
3223: # $client - Socket open on the client.
3224: #
3225: # Returns:
3226: # 1 - indicating processing should continue.
3227: # Side effects:
3228: # An & separated list of results is written to $client.
3229: #
3230: sub get_id_handler {
3231: my ($cmd, $tail, $client) = @_;
3232:
3233:
3234: my $userinput = "$client:$tail";
3235:
3236: my ($udom,$what)=split(/:/,$tail);
3237: chomp($what);
3238: my @queries=split(/\&/,$what);
3239: my $qresult='';
3240: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3241: if ($hashref) {
3242: for (my $i=0;$i<=$#queries;$i++) {
3243: $qresult.="$hashref->{$queries[$i]}&";
3244: }
3245: if (untie(%$hashref)) {
3246: $qresult=~s/\&$//;
3247: &Reply($client, "$qresult\n", $userinput);
3248: } else {
3249: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3250: "while attempting idget\n",$userinput);
3251: }
3252: } else {
3253: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3254: "while attempting idget\n",$userinput);
3255: }
3256:
3257: return 1;
3258: }
3259:
3260: register_handler("idget", \&get_id_handler, 0, 1, 0);
3261:
3262: #
3263: # Process the tmpput command I'm not sure what this does.. Seems to
3264: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3265: # where Id is the client's ip concatenated with a sequence number.
3266: # The file will contain some value that is passed in. Is this e.g.
3267: # a login token?
3268: #
3269: # Parameters:
3270: # $cmd - The command that got us dispatched.
3271: # $tail - The remainder of the request following $cmd:
3272: # In this case this will be the contents of the file.
3273: # $client - Socket connected to the client.
3274: # Returns:
3275: # 1 indicating processing can continue.
3276: # Side effects:
3277: # A file is created in the local filesystem.
3278: # A reply is sent to the client.
3279: sub tmp_put_handler {
3280: my ($cmd, $what, $client) = @_;
3281:
3282: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3283:
3284:
3285: my $store;
3286: $tmpsnum++;
3287: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3288: $id=~s/\W/\_/g;
3289: $what=~s/\n//g;
3290: my $execdir=$perlvar{'lonDaemons'};
3291: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3292: print $store $what;
3293: close $store;
3294: &Reply($client, "$id\n", $userinput);
3295: } else {
3296: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3297: "while attempting tmpput\n", $userinput);
3298: }
3299: return 1;
3300:
3301: }
3302: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
3303: # Processes the tmpget command. This command returns the contents
3304: # of a temporary resource file(?) created via tmpput.
3305: #
3306: # Paramters:
3307: # $cmd - Command that got us dispatched.
3308: # $id - Tail of the command, contain the id of the resource
3309: # we want to fetch.
3310: # $client - socket open on the client.
3311: # Return:
3312: # 1 - Inidcating processing can continue.
3313: # Side effects:
3314: # A reply is sent to the client.
3315:
3316: #
3317: sub tmp_get_handler {
3318: my ($cmd, $id, $client) = @_;
3319:
3320: my $userinput = "$cmd:$id";
3321:
3322:
3323: $id=~s/\W/\_/g;
3324: my $store;
3325: my $execdir=$perlvar{'lonDaemons'};
3326: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3327: my $reply=<$store>;
3328: &Reply( $client, "$reply\n", $userinput);
3329: close $store;
3330: } else {
3331: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3332: "while attempting tmpget\n", $userinput);
3333: }
3334:
3335: return 1;
3336: }
3337: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
3338: #
3339: # Process the tmpdel command. This command deletes a temp resource
3340: # created by the tmpput command.
3341: #
3342: # Parameters:
3343: # $cmd - Command that got us here.
3344: # $id - Id of the temporary resource created.
3345: # $client - socket open on the client process.
3346: #
3347: # Returns:
3348: # 1 - Indicating processing should continue.
3349: # Side Effects:
3350: # A file is deleted
3351: # A reply is sent to the client.
3352: sub tmp_del_handler {
3353: my ($cmd, $id, $client) = @_;
3354:
3355: my $userinput= "$cmd:$id";
3356:
3357: chomp($id);
3358: $id=~s/\W/\_/g;
3359: my $execdir=$perlvar{'lonDaemons'};
3360: if (unlink("$execdir/tmp/$id.tmp")) {
3361: &Reply($client, "ok\n", $userinput);
3362: } else {
3363: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3364: "while attempting tmpdel\n", $userinput);
3365: }
3366:
3367: return 1;
3368:
3369: }
3370: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
3371: #
1.246 foxr 3372: # Processes the setannounce command. This command
3373: # creates a file named announce.txt in the top directory of
3374: # the documentn root and sets its contents. The announce.txt file is
3375: # printed in its entirety at the LonCAPA login page. Note:
3376: # once the announcement.txt fileis created it cannot be deleted.
3377: # However, setting the contents of the file to empty removes the
3378: # announcement from the login page of loncapa so who cares.
3379: #
3380: # Parameters:
3381: # $cmd - The command that got us dispatched.
3382: # $announcement - The text of the announcement.
3383: # $client - Socket open on the client process.
3384: # Retunrns:
3385: # 1 - Indicating request processing should continue
3386: # Side Effects:
3387: # The file {DocRoot}/announcement.txt is created.
3388: # A reply is sent to $client.
3389: #
3390: sub set_announce_handler {
3391: my ($cmd, $announcement, $client) = @_;
3392:
3393: my $userinput = "$cmd:$announcement";
3394:
3395: chomp($announcement);
3396: $announcement=&unescape($announcement);
3397: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3398: '/announcement.txt')) {
3399: print $store $announcement;
3400: close $store;
3401: &Reply($client, "ok\n", $userinput);
3402: } else {
3403: &Failure($client, "error: ".($!+0)."\n", $userinput);
3404: }
3405:
3406: return 1;
3407: }
3408: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
3409: #
3410: # Return the version of the daemon. This can be used to determine
3411: # the compatibility of cross version installations or, alternatively to
3412: # simply know who's out of date and who isn't. Note that the version
3413: # is returned concatenated with the tail.
3414: # Parameters:
3415: # $cmd - the request that dispatched to us.
3416: # $tail - Tail of the request (client's version?).
3417: # $client - Socket open on the client.
3418: #Returns:
3419: # 1 - continue processing requests.
3420: # Side Effects:
3421: # Replies with version to $client.
3422: sub get_version_handler {
3423: my ($cmd, $tail, $client) = @_;
3424:
3425: my $userinput = $cmd.$tail;
3426:
3427: &Reply($client, &version($userinput)."\n", $userinput);
3428:
3429:
3430: return 1;
3431: }
3432: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
3433: # Set the current host and domain. This is used to support
3434: # multihomed systems. Each IP of the system, or even separate daemons
3435: # on the same IP can be treated as handling a separate lonCAPA virtual
3436: # machine. This command selects the virtual lonCAPA. The client always
3437: # knows the right one since it is lonc and it is selecting the domain/system
3438: # from the hosts.tab file.
3439: # Parameters:
3440: # $cmd - Command that dispatched us.
3441: # $tail - Tail of the command (domain/host requested).
3442: # $socket - Socket open on the client.
3443: #
3444: # Returns:
3445: # 1 - Indicates the program should continue to process requests.
3446: # Side-effects:
3447: # The default domain/system context is modified for this daemon.
3448: # a reply is sent to the client.
3449: #
3450: sub set_virtual_host_handler {
3451: my ($cmd, $tail, $socket) = @_;
3452:
3453: my $userinput ="$cmd:$tail";
3454:
3455: &Reply($client, &sethost($userinput)."\n", $userinput);
3456:
3457:
3458: return 1;
3459: }
1.247 albertel 3460: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 3461:
3462: # Process a request to exit:
3463: # - "bye" is sent to the client.
3464: # - The client socket is shutdown and closed.
3465: # - We indicate to the caller that we should exit.
3466: # Formal Parameters:
3467: # $cmd - The command that got us here.
3468: # $tail - Tail of the command (empty).
3469: # $client - Socket open on the tail.
3470: # Returns:
3471: # 0 - Indicating the program should exit!!
3472: #
3473: sub exit_handler {
3474: my ($cmd, $tail, $client) = @_;
3475:
3476: my $userinput = "$cmd:$tail";
3477:
3478: &logthis("Client $clientip ($clientname) hanging up: $userinput");
3479: &Reply($client, "bye\n", $userinput);
3480: $client->shutdown(2); # shutdown the socket forcibly.
3481: $client->close();
3482:
3483: return 0;
3484: }
1.248 ! foxr 3485: ®ister_handler("exit", \&exit_handler, 0,1,1);
! 3486: ®ister_handler("init", \&exit_handler, 0,1,1);
! 3487: ®ister_handler("quit", \&exit_handler, 0,1,1);
! 3488:
! 3489: # Determine if auto-enrollment is enabled.
! 3490: # Note that the original had what I believe to be a defect.
! 3491: # The original returned 0 if the requestor was not a registerd client.
! 3492: # It should return "refused".
! 3493: # Formal Parameters:
! 3494: # $cmd - The command that invoked us.
! 3495: # $tail - The tail of the command (Extra command parameters.
! 3496: # $client - The socket open on the client that issued the request.
! 3497: # Returns:
! 3498: # 1 - Indicating processing should continue.
! 3499: #
! 3500: sub enrollment_enabled_handler {
! 3501: my ($cmd, $tail, $client) = @_;
! 3502: my $userinput = $cmd.":".$tail; # For logging purposes.
! 3503:
! 3504:
! 3505: my $cdom = split(/:/, $tail); # Domain we're asking about.
! 3506: my $outcome = &localenroll::run($cdom);
! 3507: &Reply($client, "$outcome\n", $userinput);
! 3508:
! 3509: return 1;
! 3510: }
! 3511: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
! 3512:
! 3513: # Get the official sections for which auto-enrollment is possible.
! 3514: # Since the admin people won't know about 'unofficial sections'
! 3515: # we cannot auto-enroll on them.
! 3516: # Formal Parameters:
! 3517: # $cmd - The command request that got us dispatched here.
! 3518: # $tail - The remainder of the request. In our case this
! 3519: # will be split into:
! 3520: # $coursecode - The course name from the admin point of view.
! 3521: # $cdom - The course's domain(?).
! 3522: # $client - Socket open on the client.
! 3523: # Returns:
! 3524: # 1 - Indiciting processing should continue.
! 3525: #
! 3526: sub get_sections_handler {
! 3527: my ($cmd, $tail, $client) = @_;
! 3528: my $userinput = "$cmd:$tail";
! 3529:
! 3530: my ($coursecode, $cdom) = split(/:/, $tail);
! 3531: my @secs = &localenroll::get_sections($coursecode,$cdom);
! 3532: my $seclist = &escape(join(':',@secs));
! 3533:
! 3534: &Reply($client, "$seclist\n", $userinput);
! 3535:
! 3536:
! 3537: return 1;
! 3538: }
! 3539: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
! 3540:
! 3541: # Validate the owner of a new course section.
! 3542: #
! 3543: # Formal Parameters:
! 3544: # $cmd - Command that got us dispatched.
! 3545: # $tail - the remainder of the command. For us this consists of a
! 3546: # colon separated string containing:
! 3547: # $inst - Course Id from the institutions point of view.
! 3548: # $owner - Proposed owner of the course.
! 3549: # $cdom - Domain of the course (from the institutions
! 3550: # point of view?)..
! 3551: # $client - Socket open on the client.
! 3552: #
! 3553: # Returns:
! 3554: # 1 - Processing should continue.
! 3555: #
! 3556: sub validate_course_owner_handler {
! 3557: my ($cmd, $tail, $client) = @_;
! 3558: my $userinput = "$cmd:$tail";
! 3559: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
! 3560:
! 3561: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
! 3562: &Reply($client, "$outcome\n", $userinput);
! 3563:
! 3564:
! 3565:
! 3566: return 1;
! 3567: }
! 3568: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
! 3569: #
! 3570: # Validate a course section in the official schedule of classes
! 3571: # from the institutions point of view (part of autoenrollment).
! 3572: #
! 3573: # Formal Parameters:
! 3574: # $cmd - The command request that got us dispatched.
! 3575: # $tail - The tail of the command. In this case,
! 3576: # this is a colon separated set of words that will be split
! 3577: # into:
! 3578: # $inst_course_id - The course/section id from the
! 3579: # institutions point of view.
! 3580: # $cdom - The domain from the institutions
! 3581: # point of view.
! 3582: # $client - Socket open on the client.
! 3583: # Returns:
! 3584: # 1 - Indicating processing should continue.
! 3585: #
! 3586: sub validate_course_section_handler {
! 3587: my ($cmd, $tail, $client) = @_;
! 3588: my $userinput = "$cmd:$tail";
! 3589: my ($inst_course_id, $cdom) = split(/:/, $tail);
! 3590:
! 3591: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
! 3592: &Reply($client, "$outcome\n", $userinput);
! 3593:
! 3594:
! 3595: return 1;
! 3596: }
! 3597: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
! 3598:
! 3599: #
! 3600: # Create a password for a new auto-enrollment user.
! 3601: # I think/guess, this password allows access to the institutions
! 3602: # AIS class list server/services. Stuart can correct this comment
! 3603: # when he finds out how wrong I am.
! 3604: #
! 3605: # Formal Parameters:
! 3606: # $cmd - The command request that got us dispatched.
! 3607: # $tail - The tail of the command. In this case this is a colon separated
! 3608: # set of words that will be split into:
! 3609: # $authparam - An authentication parameter (username??).
! 3610: # $cdom - The domain of the course from the institution's
! 3611: # point of view.
! 3612: # $client - The socket open on the client.
! 3613: # Returns:
! 3614: # 1 - continue processing.
! 3615: #
! 3616: sub create_auto_enroll_password_handler {
! 3617: my ($cmd, $tail, $client) = @_;
! 3618: my $userinput = "$cmd:$tail";
! 3619:
! 3620: my ($authparam, $cdom) = split(/:/, $userinput);
! 3621:
! 3622: my ($create_passwd,$authchk);
! 3623: ($authparam,
! 3624: $create_passwd,
! 3625: $authchk) = &localenroll::create_password($authparam,$cdom);
! 3626:
! 3627: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
! 3628: $userinput);
! 3629:
! 3630:
! 3631: return 1;
! 3632: }
! 3633: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
! 3634: 0, 1, 0);
! 3635:
! 3636: # Retrieve and remove temporary files created by/during autoenrollment.
! 3637: #
! 3638: # Formal Parameters:
! 3639: # $cmd - The command that got us dispatched.
! 3640: # $tail - The tail of the command. In our case this is a colon
! 3641: # separated list that will be split into:
! 3642: # $filename - The name of the file to remove.
! 3643: # The filename is given as a path relative to
! 3644: # the LonCAPA temp file directory.
! 3645: # $client - Socket open on the client.
! 3646: #
! 3647: # Returns:
! 3648: # 1 - Continue processing.
! 3649:
! 3650: sub retrieve_auto_file_handler {
! 3651: my ($cmd, $tail, $client) = @_;
! 3652: my $userinput = "cmd:$tail";
! 3653:
! 3654: my ($filename) = split(/:/, $tail);
! 3655:
! 3656: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
! 3657: if ( (-e $source) && ($filename ne '') ) {
! 3658: my $reply = '';
! 3659: if (open(my $fh,$source)) {
! 3660: while (<$fh>) {
! 3661: chomp($_);
! 3662: $_ =~ s/^\s+//g;
! 3663: $_ =~ s/\s+$//g;
! 3664: $reply .= $_;
! 3665: }
! 3666: close($fh);
! 3667: &Reply($client, &escape($reply)."\n", $userinput);
! 3668:
! 3669: # Does this have to be uncommented??!? (RF).
! 3670: #
! 3671: # unlink($source);
! 3672: } else {
! 3673: &Failure($client, "error\n", $userinput);
! 3674: }
! 3675: } else {
! 3676: &Failure($client, "error\n", $userinput);
! 3677: }
! 3678:
! 3679:
! 3680: return 1;
! 3681: }
! 3682: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
! 3683:
! 3684: #
! 3685: # Read and retrieve institutional code format (for support form).
! 3686: # Formal Parameters:
! 3687: # $cmd - Command that dispatched us.
! 3688: # $tail - Tail of the command. In this case it conatins
! 3689: # the course domain and the coursename.
! 3690: # $client - Socket open on the client.
! 3691: # Returns:
! 3692: # 1 - Continue processing.
! 3693: #
! 3694: sub get_institutional_code_format_handler {
! 3695: my ($cmd, $tail, $client) = @_;
! 3696: my $userinput = "$cmd:$tail";
! 3697:
! 3698: my $reply;
! 3699: my($cdom,$course) = split(/:/,$tail);
! 3700: my @pairs = split/\&/,$course;
! 3701: my %instcodes = ();
! 3702: my %codes = ();
! 3703: my @codetitles = ();
! 3704: my %cat_titles = ();
! 3705: my %cat_order = ();
! 3706: foreach (@pairs) {
! 3707: my ($key,$value) = split/=/,$_;
! 3708: $instcodes{&unescape($key)} = &unescape($value);
! 3709: }
! 3710: my $formatreply = &localenroll::instcode_format($cdom,
! 3711: \%instcodes,
! 3712: \%codes,
! 3713: \@codetitles,
! 3714: \%cat_titles,
! 3715: \%cat_order);
! 3716: if ($formatreply eq 'ok') {
! 3717: my $codes_str = &hash2str(%codes);
! 3718: my $codetitles_str = &array2str(@codetitles);
! 3719: my $cat_titles_str = &hash2str(%cat_titles);
! 3720: my $cat_order_str = &hash2str(%cat_order);
! 3721: &Reply($client,
! 3722: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
! 3723: .$cat_order_str."\n",
! 3724: $userinput);
! 3725: } else {
! 3726: # this else branch added by RF since if not ok, lonc will
! 3727: # hang waiting on reply until timeout.
! 3728: #
! 3729: &Reply($client, "format_error\n", $userinput);
! 3730: }
! 3731:
! 3732: return 1;
! 3733: }
1.246 foxr 3734:
1.248 ! foxr 3735: ®ister_handler("autoinstcodeformat", \&get_institutional_code_format_handler,
! 3736: 0,1,0);
1.246 foxr 3737:
3738: #
3739: #
1.234 foxr 3740: #
1.231 foxr 3741: #
3742: #
1.207 foxr 3743: #---------------------------------------------------------------
3744: #
3745: # Getting, decoding and dispatching requests:
3746: #
3747:
3748: #
3749: # Get a Request:
3750: # Gets a Request message from the client. The transaction
3751: # is defined as a 'line' of text. We remove the new line
3752: # from the text line.
1.226 foxr 3753: #
1.211 albertel 3754: sub get_request {
1.207 foxr 3755: my $input = <$client>;
3756: chomp($input);
1.226 foxr 3757:
1.234 foxr 3758: &Debug("get_request: Request = $input\n");
1.207 foxr 3759:
3760: &status('Processing '.$clientname.':'.$input);
3761:
3762: return $input;
3763: }
1.212 foxr 3764: #---------------------------------------------------------------
3765: #
3766: # Process a request. This sub should shrink as each action
3767: # gets farmed out into a separat sub that is registered
3768: # with the dispatch hash.
3769: #
3770: # Parameters:
3771: # user_input - The request received from the client (lonc).
3772: # Returns:
3773: # true to keep processing, false if caller should exit.
3774: #
3775: sub process_request {
3776: my ($userinput) = @_; # Easier for now to break style than to
3777: # fix all the userinput -> user_input.
3778: my $wasenc = 0; # True if request was encrypted.
3779: # ------------------------------------------------------------ See if encrypted
3780: if ($userinput =~ /^enc/) {
3781: $userinput = decipher($userinput);
3782: $wasenc=1;
3783: if(!$userinput) { # Cipher not defined.
3784: &Failure($client, "error: Encrypted data without negotated key");
3785: return 0;
3786: }
3787: }
3788: Debug("process_request: $userinput\n");
3789:
1.213 foxr 3790: #
3791: # The 'correct way' to add a command to lond is now to
3792: # write a sub to execute it and Add it to the command dispatch
3793: # hash via a call to register_handler.. The comments to that
3794: # sub should give you enough to go on to show how to do this
3795: # along with the examples that are building up as this code
3796: # is getting refactored. Until all branches of the
3797: # if/elseif monster below have been factored out into
3798: # separate procesor subs, if the dispatch hash is missing
3799: # the command keyword, we will fall through to the remainder
3800: # of the if/else chain below in order to keep this thing in
3801: # working order throughout the transmogrification.
3802:
3803: my ($command, $tail) = split(/:/, $userinput, 2);
3804: chomp($command);
3805: chomp($tail);
3806: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 3807: $command =~ s/(\r)//; # And this too for parameterless commands.
3808: if(!$tail) {
3809: $tail =""; # defined but blank.
3810: }
1.213 foxr 3811:
3812: &Debug("Command received: $command, encoded = $wasenc");
3813:
3814: if(defined $Dispatcher{$command}) {
3815:
3816: my $dispatch_info = $Dispatcher{$command};
3817: my $handler = $$dispatch_info[0];
3818: my $need_encode = $$dispatch_info[1];
3819: my $client_types = $$dispatch_info[2];
3820: Debug("Matched dispatch hash: mustencode: $need_encode "
3821: ."ClientType $client_types");
3822:
3823: # Validate the request:
3824:
3825: my $ok = 1;
3826: my $requesterprivs = 0;
3827: if(&isClient()) {
3828: $requesterprivs |= $CLIENT_OK;
3829: }
3830: if(&isManager()) {
3831: $requesterprivs |= $MANAGER_OK;
3832: }
3833: if($need_encode && (!$wasenc)) {
3834: Debug("Must encode but wasn't: $need_encode $wasenc");
3835: $ok = 0;
3836: }
3837: if(($client_types & $requesterprivs) == 0) {
3838: Debug("Client not privileged to do this operation");
3839: $ok = 0;
3840: }
3841:
3842: if($ok) {
3843: Debug("Dispatching to handler $command $tail");
3844: my $keep_going = &$handler($command, $tail, $client);
3845: return $keep_going;
3846: } else {
3847: Debug("Refusing to dispatch because client did not match requirements");
3848: Failure($client, "refused\n", $userinput);
3849: return 1;
3850: }
3851:
3852: }
3853:
1.215 foxr 3854: #------------------- Commands not yet in spearate handlers. --------------
3855:
1.212 foxr 3856: #------------------------------- is auto-enrollment enabled?
1.246 foxr 3857: if ($userinput =~/^autorun/) {
1.212 foxr 3858: if (isClient) {
3859: my ($cmd,$cdom) = split(/:/,$userinput);
3860: my $outcome = &localenroll::run($cdom);
3861: print $client "$outcome\n";
3862: } else {
3863: print $client "0\n";
3864: }
3865: #------------------------------- get official sections (for auto-enrollment).
1.231 foxr 3866: } elsif ($userinput =~/^autogetsections/) {
1.212 foxr 3867: if (isClient) {
3868: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
3869: my @secs = &localenroll::get_sections($coursecode,$cdom);
3870: my $seclist = &escape(join(':',@secs));
3871: print $client "$seclist\n";
3872: } else {
3873: print $client "refused\n";
3874: }
3875: #----------------------- validate owner of new course section (for auto-enrollment).
1.231 foxr 3876: } elsif ($userinput =~/^autonewcourse/) {
1.212 foxr 3877: if (isClient) {
3878: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
3879: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3880: print $client "$outcome\n";
3881: } else {
3882: print $client "refused\n";
3883: }
3884: #-------------- validate course section in schedule of classes (for auto-enrollment).
1.231 foxr 3885: } elsif ($userinput =~/^autovalidatecourse/) {
1.212 foxr 3886: if (isClient) {
3887: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
3888: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3889: print $client "$outcome\n";
3890: } else {
3891: print $client "refused\n";
3892: }
3893: #--------------------------- create password for new user (for auto-enrollment).
1.231 foxr 3894: } elsif ($userinput =~/^autocreatepassword/) {
1.212 foxr 3895: if (isClient) {
3896: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
3897: my ($create_passwd,$authchk);
3898: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
3899: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
3900: } else {
3901: print $client "refused\n";
3902: }
3903: #--------------------------- read and remove temporary files (for auto-enrollment).
1.231 foxr 3904: } elsif ($userinput =~/^autoretrieve/) {
1.212 foxr 3905: if (isClient) {
3906: my ($cmd,$filename) = split(/:/,$userinput);
3907: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3908: if ( (-e $source) && ($filename ne '') ) {
3909: my $reply = '';
3910: if (open(my $fh,$source)) {
3911: while (<$fh>) {
3912: chomp($_);
3913: $_ =~ s/^\s+//g;
3914: $_ =~ s/\s+$//g;
3915: $reply .= $_;
3916: }
3917: close($fh);
3918: print $client &escape($reply)."\n";
3919: # unlink($source);
3920: } else {
3921: print $client "error\n";
3922: }
3923: } else {
3924: print $client "error\n";
3925: }
3926: } else {
3927: print $client "refused\n";
3928: }
1.248 ! foxr 3929: #--------------------- read and retrieve institutional code format
! 3930: # (for support form).
1.231 foxr 3931: } elsif ($userinput =~/^autoinstcodeformat/) {
1.212 foxr 3932: if (isClient) {
3933: my $reply;
3934: my($cmd,$cdom,$course) = split(/:/,$userinput);
3935: my @pairs = split/\&/,$course;
3936: my %instcodes = ();
3937: my %codes = ();
3938: my @codetitles = ();
3939: my %cat_titles = ();
3940: my %cat_order = ();
3941: foreach (@pairs) {
3942: my ($key,$value) = split/=/,$_;
3943: $instcodes{&unescape($key)} = &unescape($value);
3944: }
3945: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
3946: if ($formatreply eq 'ok') {
3947: my $codes_str = &hash2str(%codes);
3948: my $codetitles_str = &array2str(@codetitles);
3949: my $cat_titles_str = &hash2str(%cat_titles);
3950: my $cat_order_str = &hash2str(%cat_order);
3951: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
3952: }
3953: } else {
3954: print $client "refused\n";
3955: }
3956: # ------------------------------------------------------------- unknown command
3957:
3958: } else {
3959: # unknown command
3960: print $client "unknown_cmd\n";
3961: }
3962: # -------------------------------------------------------------------- complete
3963: Debug("process_request - returning 1");
3964: return 1;
3965: }
1.207 foxr 3966: #
3967: # Decipher encoded traffic
3968: # Parameters:
3969: # input - Encoded data.
3970: # Returns:
3971: # Decoded data or undef if encryption key was not yet negotiated.
3972: # Implicit input:
3973: # cipher - This global holds the negotiated encryption key.
3974: #
1.211 albertel 3975: sub decipher {
1.207 foxr 3976: my ($input) = @_;
3977: my $output = '';
1.212 foxr 3978:
3979:
1.207 foxr 3980: if($cipher) {
3981: my($enc, $enclength, $encinput) = split(/:/, $input);
3982: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
3983: $output .=
3984: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
3985: }
3986: return substr($output, 0, $enclength);
3987: } else {
3988: return undef;
3989: }
3990: }
3991:
3992: #
3993: # Register a command processor. This function is invoked to register a sub
3994: # to process a request. Once registered, the ProcessRequest sub can automatically
3995: # dispatch requests to an appropriate sub, and do the top level validity checking
3996: # as well:
3997: # - Is the keyword recognized.
3998: # - Is the proper client type attempting the request.
3999: # - Is the request encrypted if it has to be.
4000: # Parameters:
4001: # $request_name - Name of the request being registered.
4002: # This is the command request that will match
4003: # against the hash keywords to lookup the information
4004: # associated with the dispatch information.
4005: # $procedure - Reference to a sub to call to process the request.
4006: # All subs get called as follows:
4007: # Procedure($cmd, $tail, $replyfd, $key)
4008: # $cmd - the actual keyword that invoked us.
4009: # $tail - the tail of the request that invoked us.
4010: # $replyfd- File descriptor connected to the client
4011: # $must_encode - True if the request must be encoded to be good.
4012: # $client_ok - True if it's ok for a client to request this.
4013: # $manager_ok - True if it's ok for a manager to request this.
4014: # Side effects:
4015: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4016: # - On failure, the program will die as it's a bad internal bug to try to
4017: # register a duplicate command handler.
4018: #
1.211 albertel 4019: sub register_handler {
1.212 foxr 4020: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4021:
4022: # Don't allow duplication#
4023:
4024: if (defined $Dispatcher{$request_name}) {
4025: die "Attempting to define a duplicate request handler for $request_name\n";
4026: }
4027: # Build the client type mask:
4028:
4029: my $client_type_mask = 0;
4030: if($client_ok) {
4031: $client_type_mask |= $CLIENT_OK;
4032: }
4033: if($manager_ok) {
4034: $client_type_mask |= $MANAGER_OK;
4035: }
4036:
4037: # Enter the hash:
4038:
4039: my @entry = ($procedure, $must_encode, $client_type_mask);
4040:
4041: $Dispatcher{$request_name} = \@entry;
4042:
4043: }
4044:
4045:
4046: #------------------------------------------------------------------
4047:
4048:
4049:
4050:
1.141 foxr 4051: #
1.96 foxr 4052: # Convert an error return code from lcpasswd to a string value.
4053: #
4054: sub lcpasswdstrerror {
4055: my $ErrorCode = shift;
1.97 foxr 4056: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4057: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4058: } else {
1.98 foxr 4059: return $passwderrors[$ErrorCode];
1.96 foxr 4060: }
4061: }
4062:
1.97 foxr 4063: #
4064: # Convert an error return code from lcuseradd to a string value:
4065: #
4066: sub lcuseraddstrerror {
4067: my $ErrorCode = shift;
4068: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4069: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4070: } else {
1.98 foxr 4071: return $adderrors[$ErrorCode];
1.97 foxr 4072: }
4073: }
4074:
1.23 harris41 4075: # grabs exception and records it to log before exiting
4076: sub catchexception {
1.27 albertel 4077: my ($error)=@_;
1.25 www 4078: $SIG{'QUIT'}='DEFAULT';
4079: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4080: &status("Catching exception");
1.190 albertel 4081: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4082: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4083: ."a crash with this error msg->[$error]</font>");
1.57 www 4084: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4085: if ($client) { print $client "error: $error\n"; }
1.59 www 4086: $server->close();
1.27 albertel 4087: die($error);
1.23 harris41 4088: }
1.63 www 4089: sub timeout {
1.165 albertel 4090: &status("Handling Timeout");
1.190 albertel 4091: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4092: &catchexception('Timeout');
4093: }
1.22 harris41 4094: # -------------------------------- Set signal handlers to record abnormal exits
4095:
1.226 foxr 4096:
1.22 harris41 4097: $SIG{'QUIT'}=\&catchexception;
4098: $SIG{__DIE__}=\&catchexception;
4099:
1.81 matthew 4100: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4101: &status("Read loncapa.conf and loncapa_apache.conf");
4102: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4103: %perlvar=%{$perlvarref};
1.80 harris41 4104: undef $perlvarref;
1.19 www 4105:
1.35 harris41 4106: # ----------------------------- Make sure this process is running from user=www
4107: my $wwwid=getpwnam('www');
4108: if ($wwwid!=$<) {
1.134 albertel 4109: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4110: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4111: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4112: mailto $emailto -s '$subj' > /dev/null");
4113: exit 1;
4114: }
4115:
1.19 www 4116: # --------------------------------------------- Check if other instance running
4117:
4118: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4119:
4120: if (-e $pidfile) {
4121: my $lfh=IO::File->new("$pidfile");
4122: my $pide=<$lfh>;
4123: chomp($pide);
1.29 harris41 4124: if (kill 0 => $pide) { die "already running"; }
1.19 www 4125: }
1.1 albertel 4126:
4127: # ------------------------------------------------------------- Read hosts file
4128:
4129:
4130:
4131: # establish SERVER socket, bind and listen.
4132: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4133: Type => SOCK_STREAM,
4134: Proto => 'tcp',
4135: Reuse => 1,
4136: Listen => 10 )
1.29 harris41 4137: or die "making socket: $@\n";
1.1 albertel 4138:
4139: # --------------------------------------------------------- Do global variables
4140:
4141: # global variables
4142:
1.134 albertel 4143: my %children = (); # keys are current child process IDs
1.1 albertel 4144:
4145: sub REAPER { # takes care of dead children
4146: $SIG{CHLD} = \&REAPER;
1.165 albertel 4147: &status("Handling child death");
1.178 foxr 4148: my $pid;
4149: do {
4150: $pid = waitpid(-1,&WNOHANG());
4151: if (defined($children{$pid})) {
4152: &logthis("Child $pid died");
4153: delete($children{$pid});
1.183 albertel 4154: } elsif ($pid > 0) {
1.178 foxr 4155: &logthis("Unknown Child $pid died");
4156: }
4157: } while ( $pid > 0 );
4158: foreach my $child (keys(%children)) {
4159: $pid = waitpid($child,&WNOHANG());
4160: if ($pid > 0) {
4161: &logthis("Child $child - $pid looks like we missed it's death");
4162: delete($children{$pid});
4163: }
1.176 albertel 4164: }
1.165 albertel 4165: &status("Finished Handling child death");
1.1 albertel 4166: }
4167:
4168: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4169: &status("Killing children (INT)");
1.1 albertel 4170: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4171: kill 'INT' => keys %children;
1.59 www 4172: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4173: my $execdir=$perlvar{'lonDaemons'};
4174: unlink("$execdir/logs/lond.pid");
1.190 albertel 4175: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4176: &status("Done killing children");
1.1 albertel 4177: exit; # clean up with dignity
4178: }
4179:
4180: sub HUPSMAN { # signal handler for SIGHUP
4181: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4182: &status("Killing children for restart (HUP)");
1.1 albertel 4183: kill 'INT' => keys %children;
1.59 www 4184: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4185: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4186: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4187: unlink("$execdir/logs/lond.pid");
1.165 albertel 4188: &status("Restarting self (HUP)");
1.1 albertel 4189: exec("$execdir/lond"); # here we go again
4190: }
4191:
1.144 foxr 4192: #
1.148 foxr 4193: # Kill off hashes that describe the host table prior to re-reading it.
4194: # Hashes affected are:
1.200 matthew 4195: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4196: #
4197: sub KillHostHashes {
4198: foreach my $key (keys %hostid) {
4199: delete $hostid{$key};
4200: }
4201: foreach my $key (keys %hostdom) {
4202: delete $hostdom{$key};
4203: }
4204: foreach my $key (keys %hostip) {
4205: delete $hostip{$key};
4206: }
1.200 matthew 4207: foreach my $key (keys %hostdns) {
4208: delete $hostdns{$key};
4209: }
1.148 foxr 4210: }
4211: #
4212: # Read in the host table from file and distribute it into the various hashes:
4213: #
4214: # - %hostid - Indexed by IP, the loncapa hostname.
4215: # - %hostdom - Indexed by loncapa hostname, the domain.
4216: # - %hostip - Indexed by hostid, the Ip address of the host.
4217: sub ReadHostTable {
4218:
4219: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4220: my $myloncapaname = $perlvar{'lonHostID'};
4221: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 4222: while (my $configline=<CONFIG>) {
1.178 foxr 4223: if (!($configline =~ /^\s*\#/)) {
4224: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
4225: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 4226: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4227: $hostdom{$id}=$domain; # LonCAPA domain name of host.
4228: $hostip{$id}=$ip; # IP address of host.
4229: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4230:
4231: if ($id eq $perlvar{'lonHostID'}) {
4232: Debug("Found me in the host table: $name");
4233: $thisserver=$name;
4234: }
1.178 foxr 4235: }
1.148 foxr 4236: }
4237: close(CONFIG);
4238: }
4239: #
4240: # Reload the Apache daemon's state.
1.150 foxr 4241: # This is done by invoking /home/httpd/perl/apachereload
4242: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4243: #
4244: sub ReloadApache {
1.150 foxr 4245: my $execdir = $perlvar{'lonDaemons'};
4246: my $script = $execdir."/apachereload";
4247: system($script);
1.148 foxr 4248: }
4249:
4250: #
1.144 foxr 4251: # Called in response to a USR2 signal.
4252: # - Reread hosts.tab
4253: # - All children connected to hosts that were removed from hosts.tab
4254: # are killed via SIGINT
4255: # - All children connected to previously existing hosts are sent SIGUSR1
4256: # - Our internal hosts hash is updated to reflect the new contents of
4257: # hosts.tab causing connections from hosts added to hosts.tab to
4258: # now be honored.
4259: #
4260: sub UpdateHosts {
1.165 albertel 4261: &status("Reload hosts.tab");
1.147 foxr 4262: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4263: #
4264: # The %children hash has the set of IP's we currently have children
4265: # on. These need to be matched against records in the hosts.tab
4266: # Any ip's no longer in the table get killed off they correspond to
4267: # either dropped or changed hosts. Note that the re-read of the table
4268: # will take care of new and changed hosts as connections come into being.
4269:
4270:
4271: KillHostHashes;
4272: ReadHostTable;
4273:
4274: foreach my $child (keys %children) {
4275: my $childip = $children{$child};
4276: if(!$hostid{$childip}) {
1.149 foxr 4277: logthis('<font color="blue"> UpdateHosts killing child '
4278: ." $child for ip $childip </font>");
1.148 foxr 4279: kill('INT', $child);
1.149 foxr 4280: } else {
4281: logthis('<font color="green"> keeping child for ip '
4282: ." $childip (pid=$child) </font>");
1.148 foxr 4283: }
4284: }
4285: ReloadApache;
1.165 albertel 4286: &status("Finished reloading hosts.tab");
1.144 foxr 4287: }
4288:
1.148 foxr 4289:
1.57 www 4290: sub checkchildren {
1.165 albertel 4291: &status("Checking on the children (sending signals)");
1.57 www 4292: &initnewstatus();
4293: &logstatus();
4294: &logthis('Going to check on the children');
1.134 albertel 4295: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4296: foreach (sort keys %children) {
1.221 albertel 4297: #sleep 1;
1.57 www 4298: unless (kill 'USR1' => $_) {
4299: &logthis ('Child '.$_.' is dead');
4300: &logstatus($$.' is dead');
1.221 albertel 4301: delete($children{$_});
1.57 www 4302: }
1.61 harris41 4303: }
1.63 www 4304: sleep 5;
1.212 foxr 4305: $SIG{ALRM} = sub { Debug("timeout");
4306: die "timeout"; };
1.113 albertel 4307: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4308: &status("Checking on the children (waiting for reports)");
1.63 www 4309: foreach (sort keys %children) {
4310: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4311: eval {
4312: alarm(300);
1.63 www 4313: &logthis('Child '.$_.' did not respond');
1.67 albertel 4314: kill 9 => $_;
1.131 albertel 4315: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4316: #$subj="LON: $currenthostid killed lond process $_";
4317: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4318: #$execdir=$perlvar{'lonDaemons'};
4319: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4320: delete($children{$_});
1.113 albertel 4321: alarm(0);
4322: }
1.63 www 4323: }
4324: }
1.113 albertel 4325: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4326: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4327: &status("Finished checking children");
1.221 albertel 4328: &logthis('Finished Checking children');
1.57 www 4329: }
4330:
1.1 albertel 4331: # --------------------------------------------------------------------- Logging
4332:
4333: sub logthis {
4334: my $message=shift;
4335: my $execdir=$perlvar{'lonDaemons'};
4336: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4337: my $now=time;
4338: my $local=localtime($now);
1.58 www 4339: $lastlog=$local.': '.$message;
1.1 albertel 4340: print $fh "$local ($$): $message\n";
4341: }
4342:
1.77 foxr 4343: # ------------------------- Conditional log if $DEBUG true.
4344: sub Debug {
4345: my $message = shift;
4346: if($DEBUG) {
4347: &logthis($message);
4348: }
4349: }
1.161 foxr 4350:
4351: #
4352: # Sub to do replies to client.. this gives a hook for some
4353: # debug tracing too:
4354: # Parameters:
4355: # fd - File open on client.
4356: # reply - Text to send to client.
4357: # request - Original request from client.
4358: #
4359: sub Reply {
1.192 foxr 4360: my ($fd, $reply, $request) = @_;
1.161 foxr 4361: print $fd $reply;
4362: Debug("Request was $request Reply was $reply");
4363:
1.212 foxr 4364: $Transactions++;
4365:
4366:
4367: }
4368:
4369:
4370: #
4371: # Sub to report a failure.
4372: # This function:
4373: # - Increments the failure statistic counters.
4374: # - Invokes Reply to send the error message to the client.
4375: # Parameters:
4376: # fd - File descriptor open on the client
4377: # reply - Reply text to emit.
4378: # request - The original request message (used by Reply
4379: # to debug if that's enabled.
4380: # Implicit outputs:
4381: # $Failures- The number of failures is incremented.
4382: # Reply (invoked here) sends a message to the
4383: # client:
4384: #
4385: sub Failure {
4386: my $fd = shift;
4387: my $reply = shift;
4388: my $request = shift;
4389:
4390: $Failures++;
4391: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4392: }
1.57 www 4393: # ------------------------------------------------------------------ Log status
4394:
4395: sub logstatus {
1.178 foxr 4396: &status("Doing logging");
4397: my $docdir=$perlvar{'lonDocRoot'};
4398: {
4399: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4400: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4401: $fh->close();
4402: }
1.221 albertel 4403: &status("Finished $$.txt");
4404: {
4405: open(LOG,">>$docdir/lon-status/londstatus.txt");
4406: flock(LOG,LOCK_EX);
4407: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
4408: .$status."\t".$lastlog."\t $keymode\n";
4409: flock(DB,LOCK_UN);
4410: close(LOG);
4411: }
1.178 foxr 4412: &status("Finished logging");
1.57 www 4413: }
4414:
4415: sub initnewstatus {
4416: my $docdir=$perlvar{'lonDocRoot'};
4417: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
4418: my $now=time;
4419: my $local=localtime($now);
4420: print $fh "LOND status $local - parent $$\n\n";
1.64 www 4421: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 4422: while (my $filename=readdir(DIR)) {
1.64 www 4423: unlink("$docdir/lon-status/londchld/$filename");
4424: }
4425: closedir(DIR);
1.57 www 4426: }
4427:
4428: # -------------------------------------------------------------- Status setting
4429:
4430: sub status {
4431: my $what=shift;
4432: my $now=time;
4433: my $local=localtime($now);
1.178 foxr 4434: $status=$local.': '.$what;
4435: $0='lond: '.$what.' '.$local;
1.57 www 4436: }
1.11 www 4437:
4438: # -------------------------------------------------------- Escape Special Chars
4439:
4440: sub escape {
4441: my $str=shift;
4442: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4443: return $str;
4444: }
4445:
4446: # ----------------------------------------------------- Un-Escape Special Chars
4447:
4448: sub unescape {
4449: my $str=shift;
4450: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4451: return $str;
4452: }
4453:
1.1 albertel 4454: # ----------------------------------------------------------- Send USR1 to lonc
4455:
4456: sub reconlonc {
4457: my $peerfile=shift;
4458: &logthis("Trying to reconnect for $peerfile");
4459: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
4460: if (my $fh=IO::File->new("$loncfile")) {
4461: my $loncpid=<$fh>;
4462: chomp($loncpid);
4463: if (kill 0 => $loncpid) {
4464: &logthis("lonc at pid $loncpid responding, sending USR1");
4465: kill USR1 => $loncpid;
4466: } else {
1.9 www 4467: &logthis(
1.190 albertel 4468: "<font color='red'>CRITICAL: "
1.9 www 4469: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 4470: }
4471: } else {
1.190 albertel 4472: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 4473: }
4474: }
4475:
4476: # -------------------------------------------------- Non-critical communication
1.11 www 4477:
1.1 albertel 4478: sub subreply {
4479: my ($cmd,$server)=@_;
4480: my $peerfile="$perlvar{'lonSockDir'}/$server";
4481: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4482: Type => SOCK_STREAM,
4483: Timeout => 10)
4484: or return "con_lost";
4485: print $sclient "$cmd\n";
4486: my $answer=<$sclient>;
4487: chomp($answer);
4488: if (!$answer) { $answer="con_lost"; }
4489: return $answer;
4490: }
4491:
4492: sub reply {
4493: my ($cmd,$server)=@_;
4494: my $answer;
1.115 albertel 4495: if ($server ne $currenthostid) {
1.1 albertel 4496: $answer=subreply($cmd,$server);
4497: if ($answer eq 'con_lost') {
4498: $answer=subreply("ping",$server);
4499: if ($answer ne $server) {
1.115 albertel 4500: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 4501: &reconlonc("$perlvar{'lonSockDir'}/$server");
4502: }
4503: $answer=subreply($cmd,$server);
4504: }
4505: } else {
4506: $answer='self_reply';
4507: }
4508: return $answer;
4509: }
4510:
1.13 www 4511: # -------------------------------------------------------------- Talk to lonsql
4512:
1.234 foxr 4513: sub sql_reply {
1.12 harris41 4514: my ($cmd)=@_;
1.234 foxr 4515: my $answer=&sub_sql_reply($cmd);
4516: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 4517: return $answer;
4518: }
4519:
1.234 foxr 4520: sub sub_sql_reply {
1.12 harris41 4521: my ($cmd)=@_;
4522: my $unixsock="mysqlsock";
4523: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
4524: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4525: Type => SOCK_STREAM,
4526: Timeout => 10)
4527: or return "con_lost";
4528: print $sclient "$cmd\n";
4529: my $answer=<$sclient>;
4530: chomp($answer);
4531: if (!$answer) { $answer="con_lost"; }
4532: return $answer;
4533: }
4534:
1.1 albertel 4535: # -------------------------------------------- Return path to profile directory
1.11 www 4536:
1.1 albertel 4537: sub propath {
4538: my ($udom,$uname)=@_;
4539: $udom=~s/\W//g;
4540: $uname=~s/\W//g;
1.16 www 4541: my $subdir=$uname.'__';
1.1 albertel 4542: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4543: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
4544: return $proname;
4545: }
4546:
4547: # --------------------------------------- Is this the home server of an author?
1.11 www 4548:
1.1 albertel 4549: sub ishome {
4550: my $author=shift;
4551: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
4552: my ($udom,$uname)=split(/\//,$author);
4553: my $proname=propath($udom,$uname);
4554: if (-e $proname) {
4555: return 'owner';
4556: } else {
4557: return 'not_owner';
4558: }
4559: }
4560:
4561: # ======================================================= Continue main program
4562: # ---------------------------------------------------- Fork once and dissociate
4563:
1.134 albertel 4564: my $fpid=fork;
1.1 albertel 4565: exit if $fpid;
1.29 harris41 4566: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 4567:
1.29 harris41 4568: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 4569:
4570: # ------------------------------------------------------- Write our PID on disk
4571:
1.134 albertel 4572: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 4573: open (PIDSAVE,">$execdir/logs/lond.pid");
4574: print PIDSAVE "$$\n";
4575: close(PIDSAVE);
1.190 albertel 4576: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 4577: &status('Starting');
1.1 albertel 4578:
1.106 foxr 4579:
1.1 albertel 4580:
4581: # ----------------------------------------------------- Install signal handlers
4582:
1.57 www 4583:
1.1 albertel 4584: $SIG{CHLD} = \&REAPER;
4585: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4586: $SIG{HUP} = \&HUPSMAN;
1.57 www 4587: $SIG{USR1} = \&checkchildren;
1.144 foxr 4588: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 4589:
1.148 foxr 4590: # Read the host hashes:
4591:
4592: ReadHostTable;
1.106 foxr 4593:
4594: # --------------------------------------------------------------
4595: # Accept connections. When a connection comes in, it is validated
4596: # and if good, a child process is created to process transactions
4597: # along the connection.
4598:
1.1 albertel 4599: while (1) {
1.165 albertel 4600: &status('Starting accept');
1.106 foxr 4601: $client = $server->accept() or next;
1.165 albertel 4602: &status('Accepted '.$client.' off to spawn');
1.106 foxr 4603: make_new_child($client);
1.165 albertel 4604: &status('Finished spawning');
1.1 albertel 4605: }
4606:
1.212 foxr 4607: sub make_new_child {
4608: my $pid;
4609: # my $cipher; # Now global
4610: my $sigset;
1.178 foxr 4611:
1.212 foxr 4612: $client = shift;
4613: &status('Starting new child '.$client);
4614: &logthis('<font color="green"> Attempting to start child ('.$client.
4615: ")</font>");
4616: # block signal for fork
4617: $sigset = POSIX::SigSet->new(SIGINT);
4618: sigprocmask(SIG_BLOCK, $sigset)
4619: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 4620:
1.212 foxr 4621: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 4622:
1.212 foxr 4623: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
4624: # connection liveness.
1.178 foxr 4625:
1.212 foxr 4626: #
4627: # Figure out who we're talking to so we can record the peer in
4628: # the pid hash.
4629: #
4630: my $caller = getpeername($client);
4631: my ($port,$iaddr);
4632: if (defined($caller) && length($caller) > 0) {
4633: ($port,$iaddr)=unpack_sockaddr_in($caller);
4634: } else {
4635: &logthis("Unable to determine who caller was, getpeername returned nothing");
4636: }
4637: if (defined($iaddr)) {
4638: $clientip = inet_ntoa($iaddr);
4639: Debug("Connected with $clientip");
4640: $clientdns = gethostbyaddr($iaddr, AF_INET);
4641: Debug("Connected with $clientdns by name");
4642: } else {
4643: &logthis("Unable to determine clientip");
4644: $clientip='Unavailable';
4645: }
4646:
4647: if ($pid) {
4648: # Parent records the child's birth and returns.
4649: sigprocmask(SIG_UNBLOCK, $sigset)
4650: or die "Can't unblock SIGINT for fork: $!\n";
4651: $children{$pid} = $clientip;
4652: &status('Started child '.$pid);
4653: return;
4654: } else {
4655: # Child can *not* return from this subroutine.
4656: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
4657: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
4658: #don't get intercepted
4659: $SIG{USR1}= \&logstatus;
4660: $SIG{ALRM}= \&timeout;
4661: $lastlog='Forked ';
4662: $status='Forked';
1.178 foxr 4663:
1.212 foxr 4664: # unblock signals
4665: sigprocmask(SIG_UNBLOCK, $sigset)
4666: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 4667:
1.212 foxr 4668: # my $tmpsnum=0; # Now global
4669: #---------------------------------------------------- kerberos 5 initialization
4670: &Authen::Krb5::init_context();
4671: &Authen::Krb5::init_ets();
1.209 albertel 4672:
1.212 foxr 4673: &status('Accepted connection');
4674: # =============================================================================
4675: # do something with the connection
4676: # -----------------------------------------------------------------------------
4677: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 4678:
1.212 foxr 4679: ReadManagerTable; # May also be a manager!!
4680:
4681: my $clientrec=($hostid{$clientip} ne undef);
4682: my $ismanager=($managers{$clientip} ne undef);
4683: $clientname = "[unknonwn]";
4684: if($clientrec) { # Establish client type.
4685: $ConnectionType = "client";
4686: $clientname = $hostid{$clientip};
4687: if($ismanager) {
4688: $ConnectionType = "both";
4689: }
4690: } else {
4691: $ConnectionType = "manager";
4692: $clientname = $managers{$clientip};
4693: }
4694: my $clientok;
1.178 foxr 4695:
1.212 foxr 4696: if ($clientrec || $ismanager) {
4697: &status("Waiting for init from $clientip $clientname");
4698: &logthis('<font color="yellow">INFO: Connection, '.
4699: $clientip.
4700: " ($clientname) connection type = $ConnectionType </font>" );
4701: &status("Connecting $clientip ($clientname))");
4702: my $remotereq=<$client>;
4703: chomp($remotereq);
4704: Debug("Got init: $remotereq");
4705: my $inikeyword = split(/:/, $remotereq);
4706: if ($remotereq =~ /^init/) {
4707: &sethost("sethost:$perlvar{'lonHostID'}");
4708: #
4709: # If the remote is attempting a local init... give that a try:
4710: #
4711: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 4712:
1.212 foxr 4713: # If the connection type is ssl, but I didn't get my
4714: # certificate files yet, then I'll drop back to
4715: # insecure (if allowed).
4716:
4717: if($inittype eq "ssl") {
4718: my ($ca, $cert) = lonssl::CertificateFile;
4719: my $kfile = lonssl::KeyFile;
4720: if((!$ca) ||
4721: (!$cert) ||
4722: (!$kfile)) {
4723: $inittype = ""; # This forces insecure attempt.
4724: &logthis("<font color=\"blue\"> Certificates not "
4725: ."installed -- trying insecure auth</font>");
1.224 foxr 4726: } else { # SSL certificates are in place so
1.212 foxr 4727: } # Leave the inittype alone.
4728: }
4729:
4730: if($inittype eq "local") {
4731: my $key = LocalConnection($client, $remotereq);
4732: if($key) {
4733: Debug("Got local key $key");
4734: $clientok = 1;
4735: my $cipherkey = pack("H32", $key);
4736: $cipher = new IDEA($cipherkey);
4737: print $client "ok:local\n";
4738: &logthis('<font color="green"'
4739: . "Successful local authentication </font>");
4740: $keymode = "local"
1.178 foxr 4741: } else {
1.212 foxr 4742: Debug("Failed to get local key");
4743: $clientok = 0;
4744: shutdown($client, 3);
4745: close $client;
1.178 foxr 4746: }
1.212 foxr 4747: } elsif ($inittype eq "ssl") {
4748: my $key = SSLConnection($client);
4749: if ($key) {
4750: $clientok = 1;
4751: my $cipherkey = pack("H32", $key);
4752: $cipher = new IDEA($cipherkey);
4753: &logthis('<font color="green">'
4754: ."Successfull ssl authentication with $clientname </font>");
4755: $keymode = "ssl";
4756:
1.178 foxr 4757: } else {
1.212 foxr 4758: $clientok = 0;
4759: close $client;
1.178 foxr 4760: }
1.212 foxr 4761:
4762: } else {
4763: my $ok = InsecureConnection($client);
4764: if($ok) {
4765: $clientok = 1;
4766: &logthis('<font color="green">'
4767: ."Successful insecure authentication with $clientname </font>");
4768: print $client "ok\n";
4769: $keymode = "insecure";
1.178 foxr 4770: } else {
1.212 foxr 4771: &logthis('<font color="yellow">'
4772: ."Attempted insecure connection disallowed </font>");
4773: close $client;
4774: $clientok = 0;
1.178 foxr 4775:
4776: }
4777: }
1.212 foxr 4778: } else {
4779: &logthis(
4780: "<font color='blue'>WARNING: "
4781: ."$clientip failed to initialize: >$remotereq< </font>");
4782: &status('No init '.$clientip);
4783: }
4784:
4785: } else {
4786: &logthis(
4787: "<font color='blue'>WARNING: Unknown client $clientip</font>");
4788: &status('Hung up on '.$clientip);
4789: }
4790:
4791: if ($clientok) {
4792: # ---------------- New known client connecting, could mean machine online again
4793:
4794: foreach my $id (keys(%hostip)) {
4795: if ($hostip{$id} ne $clientip ||
4796: $hostip{$currenthostid} eq $clientip) {
4797: # no need to try to do recon's to myself
4798: next;
4799: }
4800: &reconlonc("$perlvar{'lonSockDir'}/$id");
4801: }
4802: &logthis("<font color='green'>Established connection: $clientname</font>");
4803: &status('Will listen to '.$clientname);
4804: # ------------------------------------------------------------ Process requests
4805: my $keep_going = 1;
4806: my $user_input;
4807: while(($user_input = get_request) && $keep_going) {
4808: alarm(120);
4809: Debug("Main: Got $user_input\n");
4810: $keep_going = &process_request($user_input);
1.178 foxr 4811: alarm(0);
1.212 foxr 4812: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 4813: }
1.212 foxr 4814:
1.59 www 4815: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 4816: } else {
1.161 foxr 4817: print $client "refused\n";
4818: $client->close();
1.190 albertel 4819: &logthis("<font color='blue'>WARNING: "
1.161 foxr 4820: ."Rejected client $clientip, closing connection</font>");
4821: }
1.212 foxr 4822: }
1.161 foxr 4823:
1.1 albertel 4824: # =============================================================================
1.161 foxr 4825:
1.190 albertel 4826: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 4827: ."Disconnect from $clientip ($clientname)</font>");
4828:
4829:
4830: # this exit is VERY important, otherwise the child will become
4831: # a producer of more and more children, forking yourself into
4832: # process death.
4833: exit;
1.106 foxr 4834:
1.78 foxr 4835: }
4836:
4837:
4838: #
4839: # Checks to see if the input roleput request was to set
4840: # an author role. If so, invokes the lchtmldir script to set
4841: # up a correct public_html
4842: # Parameters:
4843: # request - The request sent to the rolesput subchunk.
4844: # We're looking for /domain/_au
4845: # domain - The domain in which the user is having roles doctored.
4846: # user - Name of the user for which the role is being put.
4847: # authtype - The authentication type associated with the user.
4848: #
1.230 foxr 4849: sub manage_permissions
1.78 foxr 4850: {
1.192 foxr 4851:
4852: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 4853:
4854: # See if the request is of the form /$domain/_au
4855: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4856: my $execdir = $perlvar{'lonDaemons'};
4857: my $userhome= "/home/$user" ;
1.134 albertel 4858: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 4859: system("$execdir/lchtmldir $userhome $user $authtype");
4860: }
4861: }
1.222 foxr 4862:
4863:
4864: #
4865: # Return the full path of a user password file, whether it exists or not.
4866: # Parameters:
4867: # domain - Domain in which the password file lives.
4868: # user - name of the user.
4869: # Returns:
4870: # Full passwd path:
4871: #
4872: sub password_path {
4873: my ($domain, $user) = @_;
4874:
4875:
4876: my $path = &propath($domain, $user);
4877: $path .= "/passwd";
4878:
4879: return $path;
4880: }
4881:
4882: # Password Filename
4883: # Returns the path to a passwd file given domain and user... only if
4884: # it exists.
4885: # Parameters:
4886: # domain - Domain in which to search.
4887: # user - username.
4888: # Returns:
4889: # - If the password file exists returns its path.
4890: # - If the password file does not exist, returns undefined.
4891: #
4892: sub password_filename {
4893: my ($domain, $user) = @_;
4894:
4895: Debug ("PasswordFilename called: dom = $domain user = $user");
4896:
4897: my $path = &password_path($domain, $user);
4898: Debug("PasswordFilename got path: $path");
4899: if(-e $path) {
4900: return $path;
4901: } else {
4902: return undef;
4903: }
4904: }
4905:
4906: #
4907: # Rewrite the contents of the user's passwd file.
4908: # Parameters:
4909: # domain - domain of the user.
4910: # name - User's name.
4911: # contents - New contents of the file.
4912: # Returns:
4913: # 0 - Failed.
4914: # 1 - Success.
4915: #
4916: sub rewrite_password_file {
4917: my ($domain, $user, $contents) = @_;
4918:
4919: my $file = &password_filename($domain, $user);
4920: if (defined $file) {
4921: my $pf = IO::File->new(">$file");
4922: if($pf) {
4923: print $pf "$contents\n";
4924: return 1;
4925: } else {
4926: return 0;
4927: }
4928: } else {
4929: return 0;
4930: }
4931:
4932: }
4933:
1.78 foxr 4934: #
1.222 foxr 4935: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 4936:
4937: # Returns the authorization type or nouser if there is no such user.
4938: #
1.222 foxr 4939: sub get_auth_type
1.78 foxr 4940: {
1.192 foxr 4941:
4942: my ($domain, $user) = @_;
1.78 foxr 4943:
1.222 foxr 4944: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 4945: my $proname = &propath($domain, $user);
4946: my $passwdfile = "$proname/passwd";
4947: if( -e $passwdfile ) {
4948: my $pf = IO::File->new($passwdfile);
4949: my $realpassword = <$pf>;
4950: chomp($realpassword);
1.79 foxr 4951: Debug("Password info = $realpassword\n");
1.78 foxr 4952: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 4953: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 4954: my $availinfo = '';
1.91 albertel 4955: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 4956: $availinfo = $contentpwd;
4957: }
1.79 foxr 4958:
1.78 foxr 4959: return "$authtype:$availinfo";
1.224 foxr 4960: } else {
1.79 foxr 4961: Debug("Returning nouser");
1.78 foxr 4962: return "nouser";
4963: }
1.1 albertel 4964: }
4965:
1.220 foxr 4966: #
4967: # Validate a user given their domain, name and password. This utility
4968: # function is used by both AuthenticateHandler and ChangePasswordHandler
4969: # to validate the login credentials of a user.
4970: # Parameters:
4971: # $domain - The domain being logged into (this is required due to
4972: # the capability for multihomed systems.
4973: # $user - The name of the user being validated.
4974: # $password - The user's propoposed password.
4975: #
4976: # Returns:
4977: # 1 - The domain,user,pasword triplet corresponds to a valid
4978: # user.
4979: # 0 - The domain,user,password triplet is not a valid user.
4980: #
4981: sub validate_user {
4982: my ($domain, $user, $password) = @_;
4983:
4984:
4985: # Why negative ~pi you may well ask? Well this function is about
4986: # authentication, and therefore very important to get right.
4987: # I've initialized the flag that determines whether or not I've
4988: # validated correctly to a value it's not supposed to get.
4989: # At the end of this function. I'll ensure that it's not still that
4990: # value so we don't just wind up returning some accidental value
4991: # as a result of executing an unforseen code path that
4992: # did not set $validated.
4993:
4994: my $validated = -3.14159;
4995:
4996: # How we authenticate is determined by the type of authentication
4997: # the user has been assigned. If the authentication type is
4998: # "nouser", the user does not exist so we will return 0.
4999:
1.222 foxr 5000: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5001: my ($howpwd, $contentpwd) = split(/:/, $contents);
5002:
5003: my $null = pack("C",0); # Used by kerberos auth types.
5004:
5005: if ($howpwd ne 'nouser') {
5006:
5007: if($howpwd eq "internal") { # Encrypted is in local password file.
5008: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5009: }
5010: elsif ($howpwd eq "unix") { # User is a normal unix user.
5011: $contentpwd = (getpwnam($user))[1];
5012: if($contentpwd) {
5013: if($contentpwd eq 'x') { # Shadow password file...
5014: my $pwauth_path = "/usr/local/sbin/pwauth";
5015: open PWAUTH, "|$pwauth_path" or
5016: die "Cannot invoke authentication";
5017: print PWAUTH "$user\n$password\n";
5018: close PWAUTH;
5019: $validated = ! $?;
5020:
5021: } else { # Passwords in /etc/passwd.
5022: $validated = (crypt($password,
5023: $contentpwd) eq $contentpwd);
5024: }
5025: } else {
5026: $validated = 0;
5027: }
5028: }
5029: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5030: if(! ($password =~ /$null/) ) {
5031: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5032: "",
5033: $contentpwd,,
5034: 'krbtgt',
5035: $contentpwd,
5036: 1,
5037: $password);
5038: if(!$k4error) {
5039: $validated = 1;
1.224 foxr 5040: } else {
1.220 foxr 5041: $validated = 0;
5042: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5043: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5044: }
1.224 foxr 5045: } else {
1.220 foxr 5046: $validated = 0; # Password has a match with null.
5047: }
1.224 foxr 5048: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5049: if(!($password =~ /$null/)) { # Null password not allowed.
5050: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5051: .$contentpwd);
5052: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5053: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5054: my $credentials= &Authen::Krb5::cc_default();
5055: $credentials->initialize($krbclient);
5056: my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,
5057: $krbserver,
5058: $password,
5059: $credentials);
5060: $validated = ($krbreturn == 1);
1.224 foxr 5061: } else {
1.220 foxr 5062: $validated = 0;
5063: }
1.224 foxr 5064: } elsif ($howpwd eq "localauth") {
1.220 foxr 5065: # Authenticate via installation specific authentcation method:
5066: $validated = &localauth::localauth($user,
5067: $password,
5068: $contentpwd);
1.224 foxr 5069: } else { # Unrecognized auth is also bad.
1.220 foxr 5070: $validated = 0;
5071: }
5072: } else {
5073: $validated = 0;
5074: }
5075: #
5076: # $validated has the correct stat of the authentication:
5077: #
5078:
5079: unless ($validated != -3.14159) {
5080: die "ValidateUser - failed to set the value of validated";
5081: }
5082: return $validated;
5083: }
5084:
5085:
1.84 albertel 5086: sub addline {
5087: my ($fname,$hostid,$ip,$newline)=@_;
5088: my $contents;
5089: my $found=0;
5090: my $expr='^'.$hostid.':'.$ip.':';
5091: $expr =~ s/\./\\\./g;
1.134 albertel 5092: my $sh;
1.84 albertel 5093: if ($sh=IO::File->new("$fname.subscription")) {
5094: while (my $subline=<$sh>) {
5095: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5096: }
5097: $sh->close();
5098: }
5099: $sh=IO::File->new(">$fname.subscription");
5100: if ($contents) { print $sh $contents; }
5101: if ($newline) { print $sh $newline; }
5102: $sh->close();
5103: return $found;
1.86 www 5104: }
5105:
1.234 foxr 5106: sub get_chat {
1.122 www 5107: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 5108: my %hash;
5109: my $proname=&propath($cdom,$cname);
5110: my @entries=();
1.88 albertel 5111: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5112: &GDBM_READER(),0640)) {
5113: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5114: untie %hash;
1.123 www 5115: }
1.124 www 5116: my @participants=();
1.134 albertel 5117: my $cutoff=time-60;
1.123 www 5118: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 5119: &GDBM_WRCREAT(),0640)) {
5120: $hash{$uname.':'.$udom}=time;
1.123 www 5121: foreach (sort keys %hash) {
5122: if ($hash{$_}>$cutoff) {
1.124 www 5123: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 5124: }
5125: }
5126: untie %hash;
1.86 www 5127: }
1.124 www 5128: return (@participants,@entries);
1.86 www 5129: }
5130:
1.234 foxr 5131: sub chat_add {
1.88 albertel 5132: my ($cdom,$cname,$newchat)=@_;
5133: my %hash;
5134: my $proname=&propath($cdom,$cname);
5135: my @entries=();
1.142 www 5136: my $time=time;
1.88 albertel 5137: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5138: &GDBM_WRCREAT(),0640)) {
5139: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5140: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5141: my ($thentime,$idnum)=split(/\_/,$lastid);
5142: my $newid=$time.'_000000';
5143: if ($thentime==$time) {
5144: $idnum=~s/^0+//;
5145: $idnum++;
5146: $idnum=substr('000000'.$idnum,-6,6);
5147: $newid=$time.'_'.$idnum;
5148: }
5149: $hash{$newid}=$newchat;
5150: my $expired=$time-3600;
5151: foreach (keys %hash) {
5152: my ($thistime)=($_=~/(\d+)\_/);
5153: if ($thistime<$expired) {
1.89 www 5154: delete $hash{$_};
1.88 albertel 5155: }
5156: }
5157: untie %hash;
1.142 www 5158: }
5159: {
5160: my $hfh;
5161: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
5162: print $hfh "$time:".&unescape($newchat)."\n";
5163: }
1.86 www 5164: }
1.84 albertel 5165: }
5166:
5167: sub unsub {
5168: my ($fname,$clientip)=@_;
5169: my $result;
1.188 foxr 5170: my $unsubs = 0; # Number of successful unsubscribes:
5171:
5172:
5173: # An old way subscriptions were handled was to have a
5174: # subscription marker file:
5175:
5176: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5177: if (unlink("$fname.$clientname")) {
1.188 foxr 5178: $unsubs++; # Successful unsub via marker file.
5179: }
5180:
5181: # The more modern way to do it is to have a subscription list
5182: # file:
5183:
1.84 albertel 5184: if (-e "$fname.subscription") {
1.161 foxr 5185: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5186: if ($found) {
5187: $unsubs++;
5188: }
5189: }
5190:
5191: # If either or both of these mechanisms succeeded in unsubscribing a
5192: # resource we can return ok:
5193:
5194: if($unsubs) {
5195: $result = "ok\n";
1.84 albertel 5196: } else {
1.188 foxr 5197: $result = "not_subscribed\n";
1.84 albertel 5198: }
1.188 foxr 5199:
1.84 albertel 5200: return $result;
5201: }
5202:
1.101 www 5203: sub currentversion {
5204: my $fname=shift;
5205: my $version=-1;
5206: my $ulsdir='';
5207: if ($fname=~/^(.+)\/[^\/]+$/) {
5208: $ulsdir=$1;
5209: }
1.114 albertel 5210: my ($fnamere1,$fnamere2);
5211: # remove version if already specified
1.101 www 5212: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5213: # get the bits that go before and after the version number
5214: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5215: $fnamere1=$1;
5216: $fnamere2='.'.$2;
5217: }
1.101 www 5218: if (-e $fname) { $version=1; }
5219: if (-e $ulsdir) {
1.134 albertel 5220: if(-d $ulsdir) {
5221: if (opendir(LSDIR,$ulsdir)) {
5222: my $ulsfn;
5223: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5224: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5225: my $thisfile=$ulsdir.'/'.$ulsfn;
5226: unless (-l $thisfile) {
1.160 www 5227: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5228: if ($1>$version) { $version=$1; }
5229: }
5230: }
5231: }
5232: closedir(LSDIR);
5233: $version++;
5234: }
5235: }
5236: }
5237: return $version;
1.101 www 5238: }
5239:
5240: sub thisversion {
5241: my $fname=shift;
5242: my $version=-1;
5243: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5244: $version=$1;
5245: }
5246: return $version;
5247: }
5248:
1.84 albertel 5249: sub subscribe {
5250: my ($userinput,$clientip)=@_;
5251: my $result;
5252: my ($cmd,$fname)=split(/:/,$userinput);
5253: my $ownership=&ishome($fname);
5254: if ($ownership eq 'owner') {
1.101 www 5255: # explitly asking for the current version?
5256: unless (-e $fname) {
5257: my $currentversion=¤tversion($fname);
5258: if (&thisversion($fname)==$currentversion) {
5259: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5260: my $root=$1;
5261: my $extension=$2;
5262: symlink($root.'.'.$extension,
5263: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5264: unless ($extension=~/\.meta$/) {
5265: symlink($root.'.'.$extension.'.meta',
5266: $root.'.'.$currentversion.'.'.$extension.'.meta');
5267: }
1.101 www 5268: }
5269: }
5270: }
1.84 albertel 5271: if (-e $fname) {
5272: if (-d $fname) {
5273: $result="directory\n";
5274: } else {
1.161 foxr 5275: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5276: my $now=time;
1.161 foxr 5277: my $found=&addline($fname,$clientname,$clientip,
5278: "$clientname:$clientip:$now\n");
1.84 albertel 5279: if ($found) { $result="$fname\n"; }
5280: # if they were subscribed to only meta data, delete that
5281: # subscription, when you subscribe to a file you also get
5282: # the metadata
5283: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5284: $fname=~s/\/home\/httpd\/html\/res/raw/;
5285: $fname="http://$thisserver/".$fname;
5286: $result="$fname\n";
5287: }
5288: } else {
5289: $result="not_found\n";
5290: }
5291: } else {
5292: $result="rejected\n";
5293: }
5294: return $result;
5295: }
1.91 albertel 5296:
5297: sub make_passwd_file {
1.98 foxr 5298: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5299: my $result="ok\n";
5300: if ($umode eq 'krb4' or $umode eq 'krb5') {
5301: {
5302: my $pf = IO::File->new(">$passfilename");
5303: print $pf "$umode:$npass\n";
5304: }
5305: } elsif ($umode eq 'internal') {
5306: my $salt=time;
5307: $salt=substr($salt,6,2);
5308: my $ncpass=crypt($npass,$salt);
5309: {
5310: &Debug("Creating internal auth");
5311: my $pf = IO::File->new(">$passfilename");
5312: print $pf "internal:$ncpass\n";
5313: }
5314: } elsif ($umode eq 'localauth') {
5315: {
5316: my $pf = IO::File->new(">$passfilename");
5317: print $pf "localauth:$npass\n";
5318: }
5319: } elsif ($umode eq 'unix') {
5320: {
1.186 foxr 5321: #
5322: # Don't allow the creation of privileged accounts!!! that would
5323: # be real bad!!!
5324: #
5325: my $uid = getpwnam($uname);
5326: if((defined $uid) && ($uid == 0)) {
5327: &logthis(">>>Attempted to create privilged account blocked");
5328: return "no_priv_account_error\n";
5329: }
5330:
1.223 foxr 5331: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5332:
5333: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5334: {
5335: &Debug("Executing external: ".$execpath);
1.98 foxr 5336: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5337: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5338: print $se "$uname\n";
5339: print $se "$npass\n";
5340: print $se "$npass\n";
1.223 foxr 5341: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5342: }
1.223 foxr 5343: my $error = IO::File->new("< $lc_error_file");
5344: my $useraddok = <$error>;
5345: $error->close;
5346: unlink($lc_error_file);
5347:
5348: chomp $useraddok;
5349:
1.97 foxr 5350: if($useraddok > 0) {
1.223 foxr 5351: my $error_text = &lcuseraddstrerror($useraddok);
5352: &logthis("Failed lcuseradd: $error_text");
5353: $result = "lcuseradd_failed:$error_text\n";
1.224 foxr 5354: } else {
1.223 foxr 5355: my $pf = IO::File->new(">$passfilename");
5356: print $pf "unix:\n";
1.91 albertel 5357: }
5358: }
5359: } elsif ($umode eq 'none') {
5360: {
1.223 foxr 5361: my $pf = IO::File->new("> $passfilename");
1.91 albertel 5362: print $pf "none:\n";
5363: }
5364: } else {
5365: $result="auth_mode_error\n";
5366: }
5367: return $result;
1.121 albertel 5368: }
5369:
5370: sub sethost {
5371: my ($remotereq) = @_;
5372: my (undef,$hostid)=split(/:/,$remotereq);
5373: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
5374: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 5375: $currenthostid =$hostid;
1.121 albertel 5376: $currentdomainid=$hostdom{$hostid};
5377: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
5378: } else {
5379: &logthis("Requested host id $hostid not an alias of ".
5380: $perlvar{'lonHostID'}." refusing connection");
5381: return 'unable_to_set';
5382: }
5383: return 'ok';
5384: }
5385:
5386: sub version {
5387: my ($userinput)=@_;
5388: $remoteVERSION=(split(/:/,$userinput))[1];
5389: return "version:$VERSION";
1.127 albertel 5390: }
1.178 foxr 5391:
1.128 albertel 5392: #There is a copy of this in lonnet.pm
1.127 albertel 5393: sub userload {
5394: my $numusers=0;
5395: {
5396: opendir(LONIDS,$perlvar{'lonIDsDir'});
5397: my $filename;
5398: my $curtime=time;
5399: while ($filename=readdir(LONIDS)) {
5400: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 5401: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 5402: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 5403: }
5404: closedir(LONIDS);
5405: }
5406: my $userloadpercent=0;
5407: my $maxuserload=$perlvar{'lonUserLoadLim'};
5408: if ($maxuserload) {
1.129 albertel 5409: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 5410: }
1.130 albertel 5411: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 5412: return $userloadpercent;
1.91 albertel 5413: }
5414:
1.205 raeburn 5415: # Routines for serializing arrays and hashes (copies from lonnet)
5416:
5417: sub array2str {
5418: my (@array) = @_;
5419: my $result=&arrayref2str(\@array);
5420: $result=~s/^__ARRAY_REF__//;
5421: $result=~s/__END_ARRAY_REF__$//;
5422: return $result;
5423: }
5424:
5425: sub arrayref2str {
5426: my ($arrayref) = @_;
5427: my $result='__ARRAY_REF__';
5428: foreach my $elem (@$arrayref) {
5429: if(ref($elem) eq 'ARRAY') {
5430: $result.=&arrayref2str($elem).'&';
5431: } elsif(ref($elem) eq 'HASH') {
5432: $result.=&hashref2str($elem).'&';
5433: } elsif(ref($elem)) {
5434: #print("Got a ref of ".(ref($elem))." skipping.");
5435: } else {
5436: $result.=&escape($elem).'&';
5437: }
5438: }
5439: $result=~s/\&$//;
5440: $result .= '__END_ARRAY_REF__';
5441: return $result;
5442: }
5443:
5444: sub hash2str {
5445: my (%hash) = @_;
5446: my $result=&hashref2str(\%hash);
5447: $result=~s/^__HASH_REF__//;
5448: $result=~s/__END_HASH_REF__$//;
5449: return $result;
5450: }
5451:
5452: sub hashref2str {
5453: my ($hashref)=@_;
5454: my $result='__HASH_REF__';
5455: foreach (sort(keys(%$hashref))) {
5456: if (ref($_) eq 'ARRAY') {
5457: $result.=&arrayref2str($_).'=';
5458: } elsif (ref($_) eq 'HASH') {
5459: $result.=&hashref2str($_).'=';
5460: } elsif (ref($_)) {
5461: $result.='=';
5462: #print("Got a ref of ".(ref($_))." skipping.");
5463: } else {
5464: if ($_) {$result.=&escape($_).'=';} else { last; }
5465: }
5466:
5467: if(ref($hashref->{$_}) eq 'ARRAY') {
5468: $result.=&arrayref2str($hashref->{$_}).'&';
5469: } elsif(ref($hashref->{$_}) eq 'HASH') {
5470: $result.=&hashref2str($hashref->{$_}).'&';
5471: } elsif(ref($hashref->{$_})) {
5472: $result.='&';
5473: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
5474: } else {
5475: $result.=&escape($hashref->{$_}).'&';
5476: }
5477: }
5478: $result=~s/\&$//;
5479: $result .= '__END_HASH_REF__';
5480: return $result;
5481: }
1.200 matthew 5482:
1.61 harris41 5483: # ----------------------------------- POD (plain old documentation, CPAN style)
5484:
5485: =head1 NAME
5486:
5487: lond - "LON Daemon" Server (port "LOND" 5663)
5488:
5489: =head1 SYNOPSIS
5490:
1.74 harris41 5491: Usage: B<lond>
5492:
5493: Should only be run as user=www. This is a command-line script which
5494: is invoked by B<loncron>. There is no expectation that a typical user
5495: will manually start B<lond> from the command-line. (In other words,
5496: DO NOT START B<lond> YOURSELF.)
1.61 harris41 5497:
5498: =head1 DESCRIPTION
5499:
1.74 harris41 5500: There are two characteristics associated with the running of B<lond>,
5501: PROCESS MANAGEMENT (starting, stopping, handling child processes)
5502: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
5503: subscriptions, etc). These are described in two large
5504: sections below.
5505:
5506: B<PROCESS MANAGEMENT>
5507:
1.61 harris41 5508: Preforker - server who forks first. Runs as a daemon. HUPs.
5509: Uses IDEA encryption
5510:
1.74 harris41 5511: B<lond> forks off children processes that correspond to the other servers
5512: in the network. Management of these processes can be done at the
5513: parent process level or the child process level.
5514:
5515: B<logs/lond.log> is the location of log messages.
5516:
5517: The process management is now explained in terms of linux shell commands,
5518: subroutines internal to this code, and signal assignments:
5519:
5520: =over 4
5521:
5522: =item *
5523:
5524: PID is stored in B<logs/lond.pid>
5525:
5526: This is the process id number of the parent B<lond> process.
5527:
5528: =item *
5529:
5530: SIGTERM and SIGINT
5531:
5532: Parent signal assignment:
5533: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5534:
5535: Child signal assignment:
5536: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
5537: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
5538: to restart a new child.)
5539:
5540: Command-line invocations:
5541: B<kill> B<-s> SIGTERM I<PID>
5542: B<kill> B<-s> SIGINT I<PID>
5543:
5544: Subroutine B<HUNTSMAN>:
5545: This is only invoked for the B<lond> parent I<PID>.
5546: This kills all the children, and then the parent.
5547: The B<lonc.pid> file is cleared.
5548:
5549: =item *
5550:
5551: SIGHUP
5552:
5553: Current bug:
5554: This signal can only be processed the first time
5555: on the parent process. Subsequent SIGHUP signals
5556: have no effect.
5557:
5558: Parent signal assignment:
5559: $SIG{HUP} = \&HUPSMAN;
5560:
5561: Child signal assignment:
5562: none (nothing happens)
5563:
5564: Command-line invocations:
5565: B<kill> B<-s> SIGHUP I<PID>
5566:
5567: Subroutine B<HUPSMAN>:
5568: This is only invoked for the B<lond> parent I<PID>,
5569: This kills all the children, and then the parent.
5570: The B<lond.pid> file is cleared.
5571:
5572: =item *
5573:
5574: SIGUSR1
5575:
5576: Parent signal assignment:
5577: $SIG{USR1} = \&USRMAN;
5578:
5579: Child signal assignment:
5580: $SIG{USR1}= \&logstatus;
5581:
5582: Command-line invocations:
5583: B<kill> B<-s> SIGUSR1 I<PID>
5584:
5585: Subroutine B<USRMAN>:
5586: When invoked for the B<lond> parent I<PID>,
5587: SIGUSR1 is sent to all the children, and the status of
5588: each connection is logged.
1.144 foxr 5589:
5590: =item *
5591:
5592: SIGUSR2
5593:
5594: Parent Signal assignment:
5595: $SIG{USR2} = \&UpdateHosts
5596:
5597: Child signal assignment:
5598: NONE
5599:
1.74 harris41 5600:
5601: =item *
5602:
5603: SIGCHLD
5604:
5605: Parent signal assignment:
5606: $SIG{CHLD} = \&REAPER;
5607:
5608: Child signal assignment:
5609: none
5610:
5611: Command-line invocations:
5612: B<kill> B<-s> SIGCHLD I<PID>
5613:
5614: Subroutine B<REAPER>:
5615: This is only invoked for the B<lond> parent I<PID>.
5616: Information pertaining to the child is removed.
5617: The socket port is cleaned up.
5618:
5619: =back
5620:
5621: B<SERVER-SIDE ACTIVITIES>
5622:
5623: Server-side information can be accepted in an encrypted or non-encrypted
5624: method.
5625:
5626: =over 4
5627:
5628: =item ping
5629:
5630: Query a client in the hosts.tab table; "Are you there?"
5631:
5632: =item pong
5633:
5634: Respond to a ping query.
5635:
5636: =item ekey
5637:
5638: Read in encrypted key, make cipher. Respond with a buildkey.
5639:
5640: =item load
5641:
5642: Respond with CPU load based on a computation upon /proc/loadavg.
5643:
5644: =item currentauth
5645:
5646: Reply with current authentication information (only over an
5647: encrypted channel).
5648:
5649: =item auth
5650:
5651: Only over an encrypted channel, reply as to whether a user's
5652: authentication information can be validated.
5653:
5654: =item passwd
5655:
5656: Allow for a password to be set.
5657:
5658: =item makeuser
5659:
5660: Make a user.
5661:
5662: =item passwd
5663:
5664: Allow for authentication mechanism and password to be changed.
5665:
5666: =item home
1.61 harris41 5667:
1.74 harris41 5668: Respond to a question "are you the home for a given user?"
5669:
5670: =item update
5671:
5672: Update contents of a subscribed resource.
5673:
5674: =item unsubscribe
5675:
5676: The server is unsubscribing from a resource.
5677:
5678: =item subscribe
5679:
5680: The server is subscribing to a resource.
5681:
5682: =item log
5683:
5684: Place in B<logs/lond.log>
5685:
5686: =item put
5687:
5688: stores hash in namespace
5689:
1.230 foxr 5690: =item rolesputy
1.74 harris41 5691:
5692: put a role into a user's environment
5693:
5694: =item get
5695:
5696: returns hash with keys from array
5697: reference filled in from namespace
5698:
5699: =item eget
5700:
5701: returns hash with keys from array
5702: reference filled in from namesp (encrypts the return communication)
5703:
5704: =item rolesget
5705:
5706: get a role from a user's environment
5707:
5708: =item del
5709:
5710: deletes keys out of array from namespace
5711:
5712: =item keys
5713:
5714: returns namespace keys
5715:
5716: =item dump
5717:
5718: dumps the complete (or key matching regexp) namespace into a hash
5719:
5720: =item store
5721:
5722: stores hash permanently
5723: for this url; hashref needs to be given and should be a \%hashname; the
5724: remaining args aren't required and if they aren't passed or are '' they will
5725: be derived from the ENV
5726:
5727: =item restore
5728:
5729: returns a hash for a given url
5730:
5731: =item querysend
5732:
5733: Tells client about the lonsql process that has been launched in response
5734: to a sent query.
5735:
5736: =item queryreply
5737:
5738: Accept information from lonsql and make appropriate storage in temporary
5739: file space.
5740:
5741: =item idput
5742:
5743: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
5744: for each student, defined perhaps by the institutional Registrar.)
5745:
5746: =item idget
5747:
5748: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
5749: for each student, defined perhaps by the institutional Registrar.)
5750:
5751: =item tmpput
5752:
5753: Accept and store information in temporary space.
5754:
5755: =item tmpget
5756:
5757: Send along temporarily stored information.
5758:
5759: =item ls
5760:
5761: List part of a user's directory.
5762:
1.135 foxr 5763: =item pushtable
5764:
5765: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
5766: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
5767: must be restored manually in case of a problem with the new table file.
5768: pushtable requires that the request be encrypted and validated via
5769: ValidateManager. The form of the command is:
5770: enc:pushtable tablename <tablecontents> \n
5771: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
5772: cleartext newline.
5773:
1.74 harris41 5774: =item Hanging up (exit or init)
5775:
5776: What to do when a client tells the server that they (the client)
5777: are leaving the network.
5778:
5779: =item unknown command
5780:
5781: If B<lond> is sent an unknown command (not in the list above),
5782: it replys to the client "unknown_cmd".
1.135 foxr 5783:
1.74 harris41 5784:
5785: =item UNKNOWN CLIENT
5786:
5787: If the anti-spoofing algorithm cannot verify the client,
5788: the client is rejected (with a "refused" message sent
5789: to the client, and the connection is closed.
5790:
5791: =back
1.61 harris41 5792:
5793: =head1 PREREQUISITES
5794:
5795: IO::Socket
5796: IO::File
5797: Apache::File
5798: Symbol
5799: POSIX
5800: Crypt::IDEA
5801: LWP::UserAgent()
5802: GDBM_File
5803: Authen::Krb4
1.91 albertel 5804: Authen::Krb5
1.61 harris41 5805:
5806: =head1 COREQUISITES
5807:
5808: =head1 OSNAMES
5809:
5810: linux
5811:
5812: =head1 SCRIPT CATEGORIES
5813:
5814: Server/Process
5815:
5816: =cut
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