Annotation of loncom/lond, revision 1.394.2.1
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.394.2.1! raeburn 5: # $Id: lond,v 1.394 2008/02/11 18:51:41 raeburn 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/';
1.325 albertel 34: use LONCAPA;
1.80 harris41 35: use LONCAPA::Configuration;
36:
1.1 albertel 37: use IO::Socket;
38: use IO::File;
1.126 albertel 39: #use Apache::File;
1.1 albertel 40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.347 raeburn 43: use Digest::MD5 qw(md5_hex);
1.3 www 44: use GDBM_File;
45: use Authen::Krb4;
1.91 albertel 46: use Authen::Krb5;
1.49 albertel 47: use localauth;
1.193 raeburn 48: use localenroll;
1.265 albertel 49: use localstudentphoto;
1.143 foxr 50: use File::Copy;
1.292 albertel 51: use File::Find;
1.200 matthew 52: use LONCAPA::lonlocal;
53: use LONCAPA::lonssl;
1.221 albertel 54: use Fcntl qw(:flock);
1.383 raeburn 55: use Apache::lonnet;
1.1 albertel 56:
1.239 foxr 57: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 58:
1.57 www 59: my $status='';
60: my $lastlog='';
61:
1.394.2.1! raeburn 62: my $VERSION='$Revision: 1.394 $'; #' stupid emacs
1.121 albertel 63: my $remoteVERSION;
1.214 foxr 64: my $currenthostid="default";
1.115 albertel 65: my $currentdomainid;
1.134 albertel 66:
67: my $client;
1.200 matthew 68: my $clientip; # IP address of client.
69: my $clientname; # LonCAPA name of client.
1.140 foxr 70:
1.134 albertel 71: my $server;
1.200 matthew 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:
1.178 foxr 87: my %managers; # Ip -> manager names
1.161 foxr 88:
1.178 foxr 89: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 90:
1.178 foxr 91: #
1.207 foxr 92: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
93: # Each element of the hash contains a reference to an array that contains:
94: # A reference to a sub that executes the request corresponding to the keyword.
95: # A flag that is true if the request must be encoded to be acceptable.
96: # A mask with bits as follows:
97: # CLIENT_OK - Set when the function is allowed by ordinary clients
98: # MANAGER_OK - Set when the function is allowed to manager clients.
99: #
100: my $CLIENT_OK = 1;
101: my $MANAGER_OK = 2;
102: my %Dispatcher;
103:
104:
105: #
1.178 foxr 106: # The array below are password error strings."
107: #
108: my $lastpwderror = 13; # Largest error number from lcpasswd.
109: my @passwderrors = ("ok",
1.287 foxr 110: "pwchange_failure - lcpasswd must be run as user 'www'",
111: "pwchange_failure - lcpasswd got incorrect number of arguments",
112: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
113: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
114: "pwchange_failure - lcpasswd User does not exist.",
115: "pwchange_failure - lcpasswd Incorrect current passwd",
116: "pwchange_failure - lcpasswd Unable to su to root.",
117: "pwchange_failure - lcpasswd Cannot set new passwd.",
118: "pwchange_failure - lcpasswd Username has invalid characters",
119: "pwchange_failure - lcpasswd Invalid characters in password",
120: "pwchange_failure - lcpasswd User already exists",
121: "pwchange_failure - lcpasswd Something went wrong with user addition.",
122: "pwchange_failure - lcpasswd Password mismatch",
123: "pwchange_failure - lcpasswd Error filename is invalid");
1.97 foxr 124:
125:
1.178 foxr 126: # The array below are lcuseradd error strings.:
1.97 foxr 127:
1.178 foxr 128: my $lastadderror = 13;
129: my @adderrors = ("ok",
130: "User ID mismatch, lcuseradd must run as user www",
131: "lcuseradd Incorrect number of command line parameters must be 3",
132: "lcuseradd Incorrect number of stdinput lines, must be 3",
133: "lcuseradd Too many other simultaneous pwd changes in progress",
134: "lcuseradd User does not exist",
135: "lcuseradd Unable to make www member of users's group",
136: "lcuseradd Unable to su to root",
137: "lcuseradd Unable to set password",
1.377 albertel 138: "lcuseradd Username has invalid characters",
1.178 foxr 139: "lcuseradd Password has an invalid character",
140: "lcuseradd User already exists",
141: "lcuseradd Could not add user.",
142: "lcuseradd Password mismatch");
1.97 foxr 143:
1.96 foxr 144:
1.207 foxr 145:
146: #
147: # Statistics that are maintained and dislayed in the status line.
148: #
1.212 foxr 149: my $Transactions = 0; # Number of attempted transactions.
150: my $Failures = 0; # Number of transcations failed.
1.207 foxr 151:
152: # ResetStatistics:
153: # Resets the statistics counters:
154: #
155: sub ResetStatistics {
156: $Transactions = 0;
157: $Failures = 0;
158: }
159:
1.200 matthew 160: #------------------------------------------------------------------------
161: #
162: # LocalConnection
163: # Completes the formation of a locally authenticated connection.
164: # This function will ensure that the 'remote' client is really the
165: # local host. If not, the connection is closed, and the function fails.
166: # If so, initcmd is parsed for the name of a file containing the
167: # IDEA session key. The fie is opened, read, deleted and the session
168: # key returned to the caller.
169: #
170: # Parameters:
171: # $Socket - Socket open on client.
172: # $initcmd - The full text of the init command.
173: #
174: # Returns:
175: # IDEA session key on success.
176: # undef on failure.
177: #
178: sub LocalConnection {
179: my ($Socket, $initcmd) = @_;
1.373 albertel 180: Debug("Attempting local connection: $initcmd client: $clientip");
1.277 albertel 181: if($clientip ne "127.0.0.1") {
1.200 matthew 182: &logthis('<font color="red"> LocalConnection rejecting non local: '
1.373 albertel 183: ."$clientip ne 127.0.0.1 </font>");
1.200 matthew 184: close $Socket;
185: return undef;
1.224 foxr 186: } else {
1.200 matthew 187: chomp($initcmd); # Get rid of \n in filename.
188: my ($init, $type, $name) = split(/:/, $initcmd);
189: Debug(" Init command: $init $type $name ");
190:
191: # Require that $init = init, and $type = local: Otherwise
192: # the caller is insane:
193:
194: if(($init ne "init") && ($type ne "local")) {
195: &logthis('<font color = "red"> LocalConnection: caller is insane! '
196: ."init = $init, and type = $type </font>");
197: close($Socket);;
198: return undef;
199:
200: }
201: # Now get the key filename:
202:
203: my $IDEAKey = lonlocal::ReadKeyFile($name);
204: return $IDEAKey;
205: }
206: }
207: #------------------------------------------------------------------------------
208: #
209: # SSLConnection
210: # Completes the formation of an ssh authenticated connection. The
211: # socket is promoted to an ssl socket. If this promotion and the associated
212: # certificate exchange are successful, the IDEA key is generated and sent
213: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
214: # the caller after the SSL tunnel is torn down.
215: #
216: # Parameters:
217: # Name Type Purpose
218: # $Socket IO::Socket::INET Plaintext socket.
219: #
220: # Returns:
221: # IDEA key on success.
222: # undef on failure.
223: #
224: sub SSLConnection {
225: my $Socket = shift;
226:
227: Debug("SSLConnection: ");
228: my $KeyFile = lonssl::KeyFile();
229: if(!$KeyFile) {
230: my $err = lonssl::LastError();
231: &logthis("<font color=\"red\"> CRITICAL"
232: ."Can't get key file $err </font>");
233: return undef;
234: }
235: my ($CACertificate,
236: $Certificate) = lonssl::CertificateFile();
237:
238:
239: # If any of the key, certificate or certificate authority
240: # certificate filenames are not defined, this can't work.
241:
242: if((!$Certificate) || (!$CACertificate)) {
243: my $err = lonssl::LastError();
244: &logthis("<font color=\"red\"> CRITICAL"
245: ."Can't get certificates: $err </font>");
246:
247: return undef;
248: }
249: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
250:
251: # Indicate to our peer that we can procede with
252: # a transition to ssl authentication:
253:
254: print $Socket "ok:ssl\n";
255:
256: Debug("Approving promotion -> ssl");
257: # And do so:
258:
259: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
260: $CACertificate,
261: $Certificate,
262: $KeyFile);
263: if(! ($SSLSocket) ) { # SSL socket promotion failed.
264: my $err = lonssl::LastError();
265: &logthis("<font color=\"red\"> CRITICAL "
266: ."SSL Socket promotion failed: $err </font>");
267: return undef;
268: }
269: Debug("SSL Promotion successful");
270:
271: #
272: # The only thing we'll use the socket for is to send the IDEA key
273: # to the peer:
274:
275: my $Key = lonlocal::CreateCipherKey();
276: print $SSLSocket "$Key\n";
277:
278: lonssl::Close($SSLSocket);
279:
280: Debug("Key exchange complete: $Key");
281:
282: return $Key;
283: }
284: #
285: # InsecureConnection:
286: # If insecure connections are allowd,
287: # exchange a challenge with the client to 'validate' the
288: # client (not really, but that's the protocol):
289: # We produce a challenge string that's sent to the client.
290: # The client must then echo the challenge verbatim to us.
291: #
292: # Parameter:
293: # Socket - Socket open on the client.
294: # Returns:
295: # 1 - success.
296: # 0 - failure (e.g.mismatch or insecure not allowed).
297: #
298: sub InsecureConnection {
299: my $Socket = shift;
300:
301: # Don't even start if insecure connections are not allowed.
302:
303: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
304: return 0;
305: }
306:
307: # Fabricate a challenge string and send it..
308:
309: my $challenge = "$$".time; # pid + time.
310: print $Socket "$challenge\n";
311: &status("Waiting for challenge reply");
312:
313: my $answer = <$Socket>;
314: $answer =~s/\W//g;
315: if($challenge eq $answer) {
316: return 1;
1.224 foxr 317: } else {
1.200 matthew 318: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
319: &status("No challenge reqply");
320: return 0;
321: }
322:
323:
324: }
1.251 foxr 325: #
326: # Safely execute a command (as long as it's not a shel command and doesn
327: # not require/rely on shell escapes. The function operates by doing a
328: # a pipe based fork and capturing stdout and stderr from the pipe.
329: #
330: # Formal Parameters:
331: # $line - A line of text to be executed as a command.
332: # Returns:
333: # The output from that command. If the output is multiline the caller
334: # must know how to split up the output.
335: #
336: #
337: sub execute_command {
338: my ($line) = @_;
339: my @words = split(/\s/, $line); # Bust the command up into words.
340: my $output = "";
341:
342: my $pid = open(CHILD, "-|");
343:
344: if($pid) { # Parent process
345: Debug("In parent process for execute_command");
346: my @data = <CHILD>; # Read the child's outupt...
347: close CHILD;
348: foreach my $output_line (@data) {
349: Debug("Adding $output_line");
350: $output .= $output_line; # Presumably has a \n on it.
351: }
352:
353: } else { # Child process
354: close (STDERR);
355: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
356: exec(@words); # won't return.
357: }
358: return $output;
359: }
360:
1.200 matthew 361:
1.140 foxr 362: # GetCertificate: Given a transaction that requires a certificate,
363: # this function will extract the certificate from the transaction
364: # request. Note that at this point, the only concept of a certificate
365: # is the hostname to which we are connected.
366: #
367: # Parameter:
368: # request - The request sent by our client (this parameterization may
369: # need to change when we really use a certificate granting
370: # authority.
371: #
372: sub GetCertificate {
373: my $request = shift;
374:
375: return $clientip;
376: }
1.161 foxr 377:
1.178 foxr 378: #
379: # Return true if client is a manager.
380: #
381: sub isManager {
382: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
383: }
384: #
385: # Return tru if client can do client functions
386: #
387: sub isClient {
388: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
389: }
1.161 foxr 390:
391:
1.156 foxr 392: #
393: # ReadManagerTable: Reads in the current manager table. For now this is
394: # done on each manager authentication because:
395: # - These authentications are not frequent
396: # - This allows dynamic changes to the manager table
397: # without the need to signal to the lond.
398: #
399: sub ReadManagerTable {
400:
401: # Clean out the old table first..
402:
1.166 foxr 403: foreach my $key (keys %managers) {
404: delete $managers{$key};
405: }
406:
407: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
408: if (!open (MANAGERS, $tablename)) {
409: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
410: return;
411: }
412: while(my $host = <MANAGERS>) {
413: chomp($host);
414: if ($host =~ "^#") { # Comment line.
415: next;
416: }
1.368 albertel 417: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
1.161 foxr 418: # The entry is of the form:
419: # cluname:hostname
420: # cluname - A 'cluster hostname' is needed in order to negotiate
421: # the host key.
422: # hostname- The dns name of the host.
423: #
1.166 foxr 424: my($cluname, $dnsname) = split(/:/, $host);
425:
426: my $ip = gethostbyname($dnsname);
427: if(defined($ip)) { # bad names don't deserve entry.
428: my $hostip = inet_ntoa($ip);
429: $managers{$hostip} = $cluname;
430: logthis('<font color="green"> registering manager '.
431: "$dnsname as $cluname with $hostip </font>\n");
432: }
433: } else {
434: logthis('<font color="green"> existing host'." $host</font>\n");
1.368 albertel 435: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if clumemeber
1.166 foxr 436: }
437: }
1.156 foxr 438: }
1.140 foxr 439:
440: #
441: # ValidManager: Determines if a given certificate represents a valid manager.
442: # in this primitive implementation, the 'certificate' is
443: # just the connecting loncapa client name. This is checked
444: # against a valid client list in the configuration.
445: #
446: #
447: sub ValidManager {
448: my $certificate = shift;
449:
1.163 foxr 450: return isManager;
1.140 foxr 451: }
452: #
1.143 foxr 453: # CopyFile: Called as part of the process of installing a
454: # new configuration file. This function copies an existing
455: # file to a backup file.
456: # Parameters:
457: # oldfile - Name of the file to backup.
458: # newfile - Name of the backup file.
459: # Return:
460: # 0 - Failure (errno has failure reason).
461: # 1 - Success.
462: #
463: sub CopyFile {
1.192 foxr 464:
465: my ($oldfile, $newfile) = @_;
1.143 foxr 466:
1.281 matthew 467: if (! copy($oldfile,$newfile)) {
468: return 0;
1.143 foxr 469: }
1.281 matthew 470: chmod(0660, $newfile);
471: return 1;
1.143 foxr 472: }
1.157 foxr 473: #
474: # Host files are passed out with externally visible host IPs.
475: # If, for example, we are behind a fire-wall or NAT host, our
476: # internally visible IP may be different than the externally
477: # visible IP. Therefore, we always adjust the contents of the
478: # host file so that the entry for ME is the IP that we believe
479: # we have. At present, this is defined as the entry that
480: # DNS has for us. If by some chance we are not able to get a
481: # DNS translation for us, then we assume that the host.tab file
482: # is correct.
483: # BUGBUGBUG - in the future, we really should see if we can
484: # easily query the interface(s) instead.
485: # Parameter(s):
486: # contents - The contents of the host.tab to check.
487: # Returns:
488: # newcontents - The adjusted contents.
489: #
490: #
491: sub AdjustHostContents {
492: my $contents = shift;
493: my $adjusted;
494: my $me = $perlvar{'lonHostID'};
495:
1.354 albertel 496: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 497: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
498: chomp($line);
499: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
500: if ($id eq $me) {
1.354 albertel 501: my $ip = gethostbyname($name);
502: my $ipnew = inet_ntoa($ip);
503: $ip = $ipnew;
1.157 foxr 504: # Reconstruct the host line and append to adjusted:
505:
1.354 albertel 506: my $newline = "$id:$domain:$role:$name:$ip";
507: if($maxcon ne "") { # Not all hosts have loncnew tuning params
508: $newline .= ":$maxcon:$idleto:$mincon";
509: }
510: $adjusted .= $newline."\n";
1.157 foxr 511:
1.354 albertel 512: } else { # Not me, pass unmodified.
513: $adjusted .= $line."\n";
514: }
1.157 foxr 515: } else { # Blank or comment never re-written.
516: $adjusted .= $line."\n"; # Pass blanks and comments as is.
517: }
1.354 albertel 518: }
519: return $adjusted;
1.157 foxr 520: }
1.143 foxr 521: #
522: # InstallFile: Called to install an administrative file:
523: # - The file is created with <name>.tmp
524: # - The <name>.tmp file is then mv'd to <name>
525: # This lugubrious procedure is done to ensure that we are never without
526: # a valid, even if dated, version of the file regardless of who crashes
527: # and when the crash occurs.
528: #
529: # Parameters:
530: # Name of the file
531: # File Contents.
532: # Return:
533: # nonzero - success.
534: # 0 - failure and $! has an errno.
535: #
536: sub InstallFile {
1.192 foxr 537:
538: my ($Filename, $Contents) = @_;
1.143 foxr 539: my $TempFile = $Filename.".tmp";
540:
541: # Open the file for write:
542:
543: my $fh = IO::File->new("> $TempFile"); # Write to temp.
544: if(!(defined $fh)) {
545: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
546: return 0;
547: }
548: # write the contents of the file:
549:
550: print $fh ($Contents);
551: $fh->close; # In case we ever have a filesystem w. locking
552:
553: chmod(0660, $TempFile);
554:
555: # Now we can move install the file in position.
556:
557: move($TempFile, $Filename);
558:
559: return 1;
560: }
1.200 matthew 561:
562:
1.169 foxr 563: #
564: # ConfigFileFromSelector: converts a configuration file selector
565: # (one of host or domain at this point) into a
566: # configuration file pathname.
567: #
568: # Parameters:
569: # selector - Configuration file selector.
570: # Returns:
571: # Full path to the file or undef if the selector is invalid.
572: #
573: sub ConfigFileFromSelector {
574: my $selector = shift;
575: my $tablefile;
576:
577: my $tabledir = $perlvar{'lonTabDir'}.'/';
578: if ($selector eq "hosts") {
579: $tablefile = $tabledir."hosts.tab";
580: } elsif ($selector eq "domain") {
581: $tablefile = $tabledir."domain.tab";
582: } else {
583: return undef;
584: }
585: return $tablefile;
1.143 foxr 586:
1.169 foxr 587: }
1.143 foxr 588: #
1.141 foxr 589: # PushFile: Called to do an administrative push of a file.
590: # - Ensure the file being pushed is one we support.
591: # - Backup the old file to <filename.saved>
592: # - Separate the contents of the new file out from the
593: # rest of the request.
594: # - Write the new file.
595: # Parameter:
596: # Request - The entire user request. This consists of a : separated
597: # string pushfile:tablename:contents.
598: # NOTE: The contents may have :'s in it as well making things a bit
599: # more interesting... but not much.
600: # Returns:
601: # String to send to client ("ok" or "refused" if bad file).
602: #
603: sub PushFile {
604: my $request = shift;
605: my ($command, $filename, $contents) = split(":", $request, 3);
606:
607: # At this point in time, pushes for only the following tables are
608: # supported:
609: # hosts.tab ($filename eq host).
610: # domain.tab ($filename eq domain).
611: # Construct the destination filename or reject the request.
612: #
613: # lonManage is supposed to ensure this, however this session could be
614: # part of some elaborate spoof that managed somehow to authenticate.
615: #
616:
1.169 foxr 617:
618: my $tablefile = ConfigFileFromSelector($filename);
619: if(! (defined $tablefile)) {
1.141 foxr 620: return "refused";
621: }
622: #
623: # >copy< the old table to the backup table
624: # don't rename in case system crashes/reboots etc. in the time
625: # window between a rename and write.
626: #
627: my $backupfile = $tablefile;
628: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 629: if(!CopyFile($tablefile, $backupfile)) {
630: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
631: return "error:$!";
632: }
1.141 foxr 633: &logthis('<font color="green"> Pushfile: backed up '
634: .$tablefile." to $backupfile</font>");
635:
1.157 foxr 636: # If the file being pushed is the host file, we adjust the entry for ourself so that the
637: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
638: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
639: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
640: # that possibilty.
641:
642: if($filename eq "host") {
643: $contents = AdjustHostContents($contents);
644: }
645:
1.141 foxr 646: # Install the new file:
647:
1.143 foxr 648: if(!InstallFile($tablefile, $contents)) {
649: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 650: .$tablefile." $! </font>");
1.143 foxr 651: return "error:$!";
1.224 foxr 652: } else {
1.143 foxr 653: &logthis('<font color="green"> Installed new '.$tablefile
654: ."</font>");
655:
656: }
657:
1.141 foxr 658:
659: # Indicate success:
660:
661: return "ok";
662:
663: }
1.145 foxr 664:
665: #
666: # Called to re-init either lonc or lond.
667: #
668: # Parameters:
669: # request - The full request by the client. This is of the form
670: # reinit:<process>
671: # where <process> is allowed to be either of
672: # lonc or lond
673: #
674: # Returns:
675: # The string to be sent back to the client either:
676: # ok - Everything worked just fine.
677: # error:why - There was a failure and why describes the reason.
678: #
679: #
680: sub ReinitProcess {
681: my $request = shift;
682:
1.146 foxr 683:
684: # separate the request (reinit) from the process identifier and
685: # validate it producing the name of the .pid file for the process.
686: #
687: #
688: my ($junk, $process) = split(":", $request);
1.147 foxr 689: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 690: if($process eq 'lonc') {
691: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 692: if (!open(PIDFILE, "< $processpidfile")) {
693: return "error:Open failed for $processpidfile";
694: }
695: my $loncpid = <PIDFILE>;
696: close(PIDFILE);
697: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
698: ."</font>");
699: kill("USR2", $loncpid);
1.146 foxr 700: } elsif ($process eq 'lond') {
1.147 foxr 701: logthis('<font color="red"> Reinitializing self (lond) </font>');
702: &UpdateHosts; # Lond is us!!
1.146 foxr 703: } else {
704: &logthis('<font color="yellow" Invalid reinit request for '.$process
705: ."</font>");
706: return "error:Invalid process identifier $process";
707: }
1.145 foxr 708: return 'ok';
709: }
1.168 foxr 710: # Validate a line in a configuration file edit script:
711: # Validation includes:
712: # - Ensuring the command is valid.
713: # - Ensuring the command has sufficient parameters
714: # Parameters:
715: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 716: #
1.168 foxr 717: # Return:
718: # 0 - Invalid scriptline.
719: # 1 - Valid scriptline
720: # NOTE:
721: # Only the command syntax is checked, not the executability of the
722: # command.
723: #
724: sub isValidEditCommand {
725: my $scriptline = shift;
726:
727: # Line elements are pipe separated:
728:
729: my ($command, $key, $newline) = split(/\|/, $scriptline);
730: &logthis('<font color="green"> isValideditCommand checking: '.
731: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
732:
733: if ($command eq "delete") {
734: #
735: # key with no newline.
736: #
737: if( ($key eq "") || ($newline ne "")) {
738: return 0; # Must have key but no newline.
739: } else {
740: return 1; # Valid syntax.
741: }
1.169 foxr 742: } elsif ($command eq "replace") {
1.168 foxr 743: #
744: # key and newline:
745: #
746: if (($key eq "") || ($newline eq "")) {
747: return 0;
748: } else {
749: return 1;
750: }
1.169 foxr 751: } elsif ($command eq "append") {
752: if (($key ne "") && ($newline eq "")) {
753: return 1;
754: } else {
755: return 0;
756: }
1.168 foxr 757: } else {
758: return 0; # Invalid command.
759: }
760: return 0; # Should not get here!!!
761: }
1.169 foxr 762: #
763: # ApplyEdit - Applies an edit command to a line in a configuration
764: # file. It is the caller's responsiblity to validate the
765: # edit line.
766: # Parameters:
767: # $directive - A single edit directive to apply.
768: # Edit directives are of the form:
769: # append|newline - Appends a new line to the file.
770: # replace|key|newline - Replaces the line with key value 'key'
771: # delete|key - Deletes the line with key value 'key'.
772: # $editor - A config file editor object that contains the
773: # file being edited.
774: #
775: sub ApplyEdit {
1.192 foxr 776:
777: my ($directive, $editor) = @_;
1.169 foxr 778:
779: # Break the directive down into its command and its parameters
780: # (at most two at this point. The meaning of the parameters, if in fact
781: # they exist depends on the command).
782:
783: my ($command, $p1, $p2) = split(/\|/, $directive);
784:
785: if($command eq "append") {
786: $editor->Append($p1); # p1 - key p2 null.
787: } elsif ($command eq "replace") {
788: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
789: } elsif ($command eq "delete") {
790: $editor->DeleteLine($p1); # p1 - key p2 null.
791: } else { # Should not get here!!!
792: die "Invalid command given to ApplyEdit $command"
793: }
794: }
795: #
796: # AdjustOurHost:
797: # Adjusts a host file stored in a configuration file editor object
798: # for the true IP address of this host. This is necessary for hosts
799: # that live behind a firewall.
800: # Those hosts have a publicly distributed IP of the firewall, but
801: # internally must use their actual IP. We assume that a given
802: # host only has a single IP interface for now.
803: # Formal Parameters:
804: # editor - The configuration file editor to adjust. This
805: # editor is assumed to contain a hosts.tab file.
806: # Strategy:
807: # - Figure out our hostname.
808: # - Lookup the entry for this host.
809: # - Modify the line to contain our IP
810: # - Do a replace for this host.
811: sub AdjustOurHost {
812: my $editor = shift;
813:
814: # figure out who I am.
815:
816: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
817:
818: # Get my host file entry.
819:
820: my $ConfigLine = $editor->Find($myHostName);
821: if(! (defined $ConfigLine)) {
822: die "AdjustOurHost - no entry for me in hosts file $myHostName";
823: }
824: # figure out my IP:
825: # Use the config line to get my hostname.
826: # Use gethostbyname to translate that into an IP address.
827: #
1.338 albertel 828: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1.169 foxr 829: #
830: # Reassemble the config line from the elements in the list.
831: # Note that if the loncnew items were not present before, they will
832: # be now even if they would be empty
833: #
834: my $newConfigLine = $id;
1.338 albertel 835: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1.169 foxr 836: $newConfigLine .= ":".$item;
837: }
838: # Replace the line:
839:
840: $editor->ReplaceLine($id, $newConfigLine);
841:
842: }
843: #
844: # ReplaceConfigFile:
845: # Replaces a configuration file with the contents of a
846: # configuration file editor object.
847: # This is done by:
848: # - Copying the target file to <filename>.old
849: # - Writing the new file to <filename>.tmp
850: # - Moving <filename.tmp> -> <filename>
851: # This laborious process ensures that the system is never without
852: # a configuration file that's at least valid (even if the contents
853: # may be dated).
854: # Parameters:
855: # filename - Name of the file to modify... this is a full path.
856: # editor - Editor containing the file.
857: #
858: sub ReplaceConfigFile {
1.192 foxr 859:
860: my ($filename, $editor) = @_;
1.168 foxr 861:
1.169 foxr 862: CopyFile ($filename, $filename.".old");
863:
864: my $contents = $editor->Get(); # Get the contents of the file.
865:
866: InstallFile($filename, $contents);
867: }
1.168 foxr 868: #
869: #
870: # Called to edit a configuration table file
1.167 foxr 871: # Parameters:
872: # request - The entire command/request sent by lonc or lonManage
873: # Return:
874: # The reply to send to the client.
1.168 foxr 875: #
1.167 foxr 876: sub EditFile {
877: my $request = shift;
878:
879: # Split the command into it's pieces: edit:filetype:script
880:
1.339 albertel 881: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 882:
883: # Check the pre-coditions for success:
884:
1.339 albertel 885: if($cmd != "edit") { # Something is amiss afoot alack.
1.167 foxr 886: return "error:edit request detected, but request != 'edit'\n";
887: }
888: if( ($filetype ne "hosts") &&
889: ($filetype ne "domain")) {
890: return "error:edit requested with invalid file specifier: $filetype \n";
891: }
892:
893: # Split the edit script and check it's validity.
1.168 foxr 894:
895: my @scriptlines = split(/\n/, $script); # one line per element.
896: my $linecount = scalar(@scriptlines);
897: for(my $i = 0; $i < $linecount; $i++) {
898: chomp($scriptlines[$i]);
899: if(!isValidEditCommand($scriptlines[$i])) {
900: return "error:edit with bad script line: '$scriptlines[$i]' \n";
901: }
902: }
1.145 foxr 903:
1.167 foxr 904: # Execute the edit operation.
1.169 foxr 905: # - Create a config file editor for the appropriate file and
906: # - execute each command in the script:
907: #
908: my $configfile = ConfigFileFromSelector($filetype);
909: if (!(defined $configfile)) {
910: return "refused\n";
911: }
912: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 913:
1.169 foxr 914: for (my $i = 0; $i < $linecount; $i++) {
915: ApplyEdit($scriptlines[$i], $editor);
916: }
917: # If the file is the host file, ensure that our host is
918: # adjusted to have our ip:
919: #
920: if($filetype eq "host") {
921: AdjustOurHost($editor);
922: }
923: # Finally replace the current file with our file.
924: #
925: ReplaceConfigFile($configfile, $editor);
1.167 foxr 926:
927: return "ok\n";
928: }
1.207 foxr 929:
1.255 foxr 930: # read_profile
931: #
932: # Returns a set of specific entries from a user's profile file.
933: # this is a utility function that is used by both get_profile_entry and
934: # get_profile_entry_encrypted.
935: #
936: # Parameters:
937: # udom - Domain in which the user exists.
938: # uname - User's account name (loncapa account)
939: # namespace - The profile namespace to open.
940: # what - A set of & separated queries.
941: # Returns:
942: # If all ok: - The string that needs to be shipped back to the user.
943: # If failure - A string that starts with error: followed by the failure
944: # reason.. note that this probabyl gets shipped back to the
945: # user as well.
946: #
947: sub read_profile {
948: my ($udom, $uname, $namespace, $what) = @_;
949:
950: my $hashref = &tie_user_hash($udom, $uname, $namespace,
951: &GDBM_READER());
952: if ($hashref) {
953: my @queries=split(/\&/,$what);
954: my $qresult='';
955:
956: for (my $i=0;$i<=$#queries;$i++) {
957: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
958: }
959: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1.311 albertel 960: if (&untie_user_hash($hashref)) {
1.255 foxr 961: return $qresult;
962: } else {
963: return "error: ".($!+0)." untie (GDBM) Failed";
964: }
965: } else {
966: if ($!+0 == 2) {
967: return "error:No such file or GDBM reported bad block error";
968: } else {
969: return "error: ".($!+0)." tie (GDBM) Failed";
970: }
971: }
972:
973: }
1.214 foxr 974: #--------------------- Request Handlers --------------------------------------------
975: #
1.215 foxr 976: # By convention each request handler registers itself prior to the sub
977: # declaration:
1.214 foxr 978: #
979:
1.216 foxr 980: #++
981: #
1.214 foxr 982: # Handles ping requests.
983: # Parameters:
984: # $cmd - the actual keyword that invoked us.
985: # $tail - the tail of the request that invoked us.
986: # $replyfd- File descriptor connected to the client
987: # Implicit Inputs:
988: # $currenthostid - Global variable that carries the name of the host we are
989: # known as.
990: # Returns:
991: # 1 - Ok to continue processing.
992: # 0 - Program should exit.
993: # Side effects:
994: # Reply information is sent to the client.
995: sub ping_handler {
996: my ($cmd, $tail, $client) = @_;
997: Debug("$cmd $tail $client .. $currenthostid:");
998:
1.387 albertel 999: Reply( $client,\$currenthostid,"$cmd:$tail");
1.214 foxr 1000:
1001: return 1;
1002: }
1003: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1004:
1.216 foxr 1005: #++
1.215 foxr 1006: #
1007: # Handles pong requests. Pong replies with our current host id, and
1008: # the results of a ping sent to us via our lonc.
1009: #
1010: # Parameters:
1011: # $cmd - the actual keyword that invoked us.
1012: # $tail - the tail of the request that invoked us.
1013: # $replyfd- File descriptor connected to the client
1014: # Implicit Inputs:
1015: # $currenthostid - Global variable that carries the name of the host we are
1016: # connected to.
1017: # Returns:
1018: # 1 - Ok to continue processing.
1019: # 0 - Program should exit.
1020: # Side effects:
1021: # Reply information is sent to the client.
1022: sub pong_handler {
1023: my ($cmd, $tail, $replyfd) = @_;
1024:
1.365 albertel 1025: my $reply=&Apache::lonnet::reply("ping",$clientname);
1.215 foxr 1026: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1027: return 1;
1028: }
1029: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1030:
1.216 foxr 1031: #++
1032: # Called to establish an encrypted session key with the remote client.
1033: # Note that with secure lond, in most cases this function is never
1034: # invoked. Instead, the secure session key is established either
1035: # via a local file that's locked down tight and only lives for a short
1036: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1037: # bits from /dev/urandom, rather than the predictable pattern used by
1038: # by this sub. This sub is only used in the old-style insecure
1039: # key negotiation.
1040: # Parameters:
1041: # $cmd - the actual keyword that invoked us.
1042: # $tail - the tail of the request that invoked us.
1043: # $replyfd- File descriptor connected to the client
1044: # Implicit Inputs:
1045: # $currenthostid - Global variable that carries the name of the host
1046: # known as.
1047: # $clientname - Global variable that carries the name of the hsot we're connected to.
1048: # Returns:
1049: # 1 - Ok to continue processing.
1050: # 0 - Program should exit.
1051: # Implicit Outputs:
1052: # Reply information is sent to the client.
1053: # $cipher is set with a reference to a new IDEA encryption object.
1054: #
1055: sub establish_key_handler {
1056: my ($cmd, $tail, $replyfd) = @_;
1057:
1058: my $buildkey=time.$$.int(rand 100000);
1059: $buildkey=~tr/1-6/A-F/;
1060: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1061: my $key=$currenthostid.$clientname;
1062: $key=~tr/a-z/A-Z/;
1063: $key=~tr/G-P/0-9/;
1064: $key=~tr/Q-Z/0-9/;
1065: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1066: $key=substr($key,0,32);
1067: my $cipherkey=pack("H32",$key);
1068: $cipher=new IDEA $cipherkey;
1.387 albertel 1069: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1.216 foxr 1070:
1071: return 1;
1072:
1073: }
1074: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1075:
1.217 foxr 1076: # Handler for the load command. Returns the current system load average
1077: # to the requestor.
1078: #
1079: # Parameters:
1080: # $cmd - the actual keyword that invoked us.
1081: # $tail - the tail of the request that invoked us.
1082: # $replyfd- File descriptor connected to the client
1083: # Implicit Inputs:
1084: # $currenthostid - Global variable that carries the name of the host
1085: # known as.
1086: # $clientname - Global variable that carries the name of the hsot we're connected to.
1087: # Returns:
1088: # 1 - Ok to continue processing.
1089: # 0 - Program should exit.
1090: # Side effects:
1091: # Reply information is sent to the client.
1092: sub load_handler {
1093: my ($cmd, $tail, $replyfd) = @_;
1094:
1095: # Get the load average from /proc/loadavg and calculate it as a percentage of
1096: # the allowed load limit as set by the perl global variable lonLoadLim
1097:
1098: my $loadavg;
1099: my $loadfile=IO::File->new('/proc/loadavg');
1100:
1101: $loadavg=<$loadfile>;
1102: $loadavg =~ s/\s.*//g; # Extract the first field only.
1103:
1104: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1105:
1.387 albertel 1106: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1.217 foxr 1107:
1108: return 1;
1109: }
1.263 albertel 1110: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1111:
1112: #
1113: # Process the userload request. This sub returns to the client the current
1114: # user load average. It can be invoked either by clients or managers.
1115: #
1116: # Parameters:
1117: # $cmd - the actual keyword that invoked us.
1118: # $tail - the tail of the request that invoked us.
1119: # $replyfd- File descriptor connected to the client
1120: # Implicit Inputs:
1121: # $currenthostid - Global variable that carries the name of the host
1122: # known as.
1123: # $clientname - Global variable that carries the name of the hsot we're connected to.
1124: # Returns:
1125: # 1 - Ok to continue processing.
1126: # 0 - Program should exit
1127: # Implicit inputs:
1128: # whatever the userload() function requires.
1129: # Implicit outputs:
1130: # the reply is written to the client.
1131: #
1132: sub user_load_handler {
1133: my ($cmd, $tail, $replyfd) = @_;
1134:
1.365 albertel 1135: my $userloadpercent=&Apache::lonnet::userload();
1.387 albertel 1136: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1.217 foxr 1137:
1138: return 1;
1139: }
1.263 albertel 1140: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1141:
1.218 foxr 1142: # Process a request for the authorization type of a user:
1143: # (userauth).
1144: #
1145: # Parameters:
1146: # $cmd - the actual keyword that invoked us.
1147: # $tail - the tail of the request that invoked us.
1148: # $replyfd- File descriptor connected to the client
1149: # Returns:
1150: # 1 - Ok to continue processing.
1151: # 0 - Program should exit
1152: # Implicit outputs:
1153: # The user authorization type is written to the client.
1154: #
1155: sub user_authorization_type {
1156: my ($cmd, $tail, $replyfd) = @_;
1157:
1158: my $userinput = "$cmd:$tail";
1159:
1160: # Pull the domain and username out of the command tail.
1.222 foxr 1161: # and call get_auth_type to determine the authentication type.
1.218 foxr 1162:
1163: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1164: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1165: if($result eq "nouser") {
1166: &Failure( $replyfd, "unknown_user\n", $userinput);
1167: } else {
1168: #
1.222 foxr 1169: # We only want to pass the second field from get_auth_type
1.218 foxr 1170: # for ^krb.. otherwise we'll be handing out the encrypted
1171: # password for internals e.g.
1172: #
1173: my ($type,$otherinfo) = split(/:/,$result);
1174: if($type =~ /^krb/) {
1175: $type = $result;
1.269 raeburn 1176: } else {
1177: $type .= ':';
1178: }
1.387 albertel 1179: &Reply( $replyfd, \$type, $userinput);
1.218 foxr 1180: }
1181:
1182: return 1;
1183: }
1184: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1185:
1186: # Process a request by a manager to push a hosts or domain table
1187: # to us. We pick apart the command and pass it on to the subs
1188: # that already exist to do this.
1189: #
1190: # Parameters:
1191: # $cmd - the actual keyword that invoked us.
1192: # $tail - the tail of the request that invoked us.
1193: # $client - File descriptor connected to the client
1194: # Returns:
1195: # 1 - Ok to continue processing.
1196: # 0 - Program should exit
1197: # Implicit Output:
1198: # a reply is written to the client.
1199: sub push_file_handler {
1200: my ($cmd, $tail, $client) = @_;
1201:
1202: my $userinput = "$cmd:$tail";
1203:
1204: # At this time we only know that the IP of our partner is a valid manager
1205: # the code below is a hook to do further authentication (e.g. to resolve
1206: # spoofing).
1207:
1208: my $cert = &GetCertificate($userinput);
1209: if(&ValidManager($cert)) {
1210:
1211: # Now presumably we have the bona fides of both the peer host and the
1212: # process making the request.
1213:
1214: my $reply = &PushFile($userinput);
1.387 albertel 1215: &Reply($client, \$reply, $userinput);
1.218 foxr 1216:
1217: } else {
1218: &Failure( $client, "refused\n", $userinput);
1219: }
1.219 foxr 1220: return 1;
1.218 foxr 1221: }
1222: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1223:
1.243 banghart 1224: #
1225: # du - list the disk usuage of a directory recursively.
1226: #
1227: # note: stolen code from the ls file handler
1228: # under construction by Rick Banghart
1229: # .
1230: # Parameters:
1231: # $cmd - The command that dispatched us (du).
1232: # $ududir - The directory path to list... I'm not sure what this
1233: # is relative as things like ls:. return e.g.
1234: # no_such_dir.
1235: # $client - Socket open on the client.
1236: # Returns:
1237: # 1 - indicating that the daemon should not disconnect.
1238: # Side Effects:
1239: # The reply is written to $client.
1240: #
1241: sub du_handler {
1242: my ($cmd, $ududir, $client) = @_;
1.339 albertel 1243: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1.251 foxr 1244: my $userinput = "$cmd:$ududir";
1245:
1.245 albertel 1246: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1247: &Failure($client,"refused\n","$cmd:$ududir");
1248: return 1;
1249: }
1.249 foxr 1250: # Since $ududir could have some nasties in it,
1251: # we will require that ududir is a valid
1252: # directory. Just in case someone tries to
1253: # slip us a line like .;(cd /home/httpd rm -rf*)
1254: # etc.
1255: #
1256: if (-d $ududir) {
1.292 albertel 1257: my $total_size=0;
1258: my $code=sub {
1259: if ($_=~/\.\d+\./) { return;}
1260: if ($_=~/\.meta$/) { return;}
1.362 albertel 1261: if (-d $_) { return;}
1.292 albertel 1262: $total_size+=(stat($_))[7];
1263: };
1.295 raeburn 1264: chdir($ududir);
1.292 albertel 1265: find($code,$ududir);
1266: $total_size=int($total_size/1024);
1.387 albertel 1267: &Reply($client,\$total_size,"$cmd:$ududir");
1.249 foxr 1268: } else {
1.251 foxr 1269: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1.249 foxr 1270: }
1.243 banghart 1271: return 1;
1272: }
1273: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1274:
1.239 foxr 1275: #
1.280 matthew 1276: # The ls_handler routine should be considered obosolete and is retained
1277: # for communication with legacy servers. Please see the ls2_handler.
1278: #
1.239 foxr 1279: # ls - list the contents of a directory. For each file in the
1280: # selected directory the filename followed by the full output of
1281: # the stat function is returned. The returned info for each
1282: # file are separated by ':'. The stat fields are separated by &'s.
1283: # Parameters:
1284: # $cmd - The command that dispatched us (ls).
1285: # $ulsdir - The directory path to list... I'm not sure what this
1286: # is relative as things like ls:. return e.g.
1287: # no_such_dir.
1288: # $client - Socket open on the client.
1289: # Returns:
1290: # 1 - indicating that the daemon should not disconnect.
1291: # Side Effects:
1292: # The reply is written to $client.
1293: #
1294: sub ls_handler {
1.280 matthew 1295: # obsoleted by ls2_handler
1.239 foxr 1296: my ($cmd, $ulsdir, $client) = @_;
1297:
1298: my $userinput = "$cmd:$ulsdir";
1299:
1300: my $obs;
1301: my $rights;
1302: my $ulsout='';
1303: my $ulsfn;
1304: if (-e $ulsdir) {
1305: if(-d $ulsdir) {
1306: if (opendir(LSDIR,$ulsdir)) {
1307: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1308: undef($obs);
1309: undef($rights);
1.239 foxr 1310: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1311: #We do some obsolete checking here
1312: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1313: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1314: my @obsolete=<FILE>;
1315: foreach my $obsolete (@obsolete) {
1.301 www 1316: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.239 foxr 1317: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1318: }
1319: }
1320: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1321: if($obs eq '1') { $ulsout.="&1"; }
1322: else { $ulsout.="&0"; }
1323: if($rights eq '1') { $ulsout.="&1:"; }
1324: else { $ulsout.="&0:"; }
1325: }
1326: closedir(LSDIR);
1327: }
1328: } else {
1329: my @ulsstats=stat($ulsdir);
1330: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1331: }
1332: } else {
1333: $ulsout='no_such_dir';
1334: }
1335: if ($ulsout eq '') { $ulsout='empty'; }
1.387 albertel 1336: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.239 foxr 1337:
1338: return 1;
1339:
1340: }
1341: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1342:
1.280 matthew 1343: #
1344: # Please also see the ls_handler, which this routine obosolets.
1345: # ls2_handler differs from ls_handler in that it escapes its return
1346: # values before concatenating them together with ':'s.
1347: #
1348: # ls2 - list the contents of a directory. For each file in the
1349: # selected directory the filename followed by the full output of
1350: # the stat function is returned. The returned info for each
1351: # file are separated by ':'. The stat fields are separated by &'s.
1352: # Parameters:
1353: # $cmd - The command that dispatched us (ls).
1354: # $ulsdir - The directory path to list... I'm not sure what this
1355: # is relative as things like ls:. return e.g.
1356: # no_such_dir.
1357: # $client - Socket open on the client.
1358: # Returns:
1359: # 1 - indicating that the daemon should not disconnect.
1360: # Side Effects:
1361: # The reply is written to $client.
1362: #
1363: sub ls2_handler {
1364: my ($cmd, $ulsdir, $client) = @_;
1365:
1366: my $userinput = "$cmd:$ulsdir";
1367:
1368: my $obs;
1369: my $rights;
1370: my $ulsout='';
1371: my $ulsfn;
1372: if (-e $ulsdir) {
1373: if(-d $ulsdir) {
1374: if (opendir(LSDIR,$ulsdir)) {
1375: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1376: undef($obs);
1377: undef($rights);
1.280 matthew 1378: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1379: #We do some obsolete checking here
1380: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1381: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1382: my @obsolete=<FILE>;
1383: foreach my $obsolete (@obsolete) {
1.301 www 1384: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.280 matthew 1385: if($obsolete =~ m|(<copyright>)(default)|) {
1386: $rights = 1;
1387: }
1388: }
1389: }
1390: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1391: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1392: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1393: $ulsout.= &escape($tmp).':';
1394: }
1395: closedir(LSDIR);
1396: }
1397: } else {
1398: my @ulsstats=stat($ulsdir);
1399: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1400: }
1401: } else {
1402: $ulsout='no_such_dir';
1403: }
1404: if ($ulsout eq '') { $ulsout='empty'; }
1.387 albertel 1405: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.280 matthew 1406: return 1;
1407: }
1408: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1409:
1.218 foxr 1410: # Process a reinit request. Reinit requests that either
1411: # lonc or lond be reinitialized so that an updated
1412: # host.tab or domain.tab can be processed.
1413: #
1414: # Parameters:
1415: # $cmd - the actual keyword that invoked us.
1416: # $tail - the tail of the request that invoked us.
1417: # $client - File descriptor connected to the client
1418: # Returns:
1419: # 1 - Ok to continue processing.
1420: # 0 - Program should exit
1421: # Implicit output:
1422: # a reply is sent to the client.
1423: #
1424: sub reinit_process_handler {
1425: my ($cmd, $tail, $client) = @_;
1426:
1427: my $userinput = "$cmd:$tail";
1428:
1429: my $cert = &GetCertificate($userinput);
1430: if(&ValidManager($cert)) {
1431: chomp($userinput);
1432: my $reply = &ReinitProcess($userinput);
1.387 albertel 1433: &Reply( $client, \$reply, $userinput);
1.218 foxr 1434: } else {
1435: &Failure( $client, "refused\n", $userinput);
1436: }
1437: return 1;
1438: }
1439: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1440:
1441: # Process the editing script for a table edit operation.
1442: # the editing operation must be encrypted and requested by
1443: # a manager host.
1444: #
1445: # Parameters:
1446: # $cmd - the actual keyword that invoked us.
1447: # $tail - the tail of the request that invoked us.
1448: # $client - File descriptor connected to the client
1449: # Returns:
1450: # 1 - Ok to continue processing.
1451: # 0 - Program should exit
1452: # Implicit output:
1453: # a reply is sent to the client.
1454: #
1455: sub edit_table_handler {
1456: my ($command, $tail, $client) = @_;
1457:
1458: my $userinput = "$command:$tail";
1459:
1460: my $cert = &GetCertificate($userinput);
1461: if(&ValidManager($cert)) {
1462: my($filetype, $script) = split(/:/, $tail);
1463: if (($filetype eq "hosts") ||
1464: ($filetype eq "domain")) {
1465: if($script ne "") {
1466: &Reply($client, # BUGBUG - EditFile
1467: &EditFile($userinput), # could fail.
1468: $userinput);
1469: } else {
1470: &Failure($client,"refused\n",$userinput);
1471: }
1472: } else {
1473: &Failure($client,"refused\n",$userinput);
1474: }
1475: } else {
1476: &Failure($client,"refused\n",$userinput);
1477: }
1478: return 1;
1479: }
1.263 albertel 1480: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1481:
1.220 foxr 1482: #
1483: # Authenticate a user against the LonCAPA authentication
1484: # database. Note that there are several authentication
1485: # possibilities:
1486: # - unix - The user can be authenticated against the unix
1487: # password file.
1488: # - internal - The user can be authenticated against a purely
1489: # internal per user password file.
1490: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1491: # ticket granting authority.
1492: # - user - The person tailoring LonCAPA can supply a user authentication
1493: # mechanism that is per system.
1494: #
1495: # Parameters:
1496: # $cmd - The command that got us here.
1497: # $tail - Tail of the command (remaining parameters).
1498: # $client - File descriptor connected to client.
1499: # Returns
1500: # 0 - Requested to exit, caller should shut down.
1501: # 1 - Continue processing.
1502: # Implicit inputs:
1503: # The authentication systems describe above have their own forms of implicit
1504: # input into the authentication process that are described above.
1505: #
1506: sub authenticate_handler {
1507: my ($cmd, $tail, $client) = @_;
1508:
1509:
1510: # Regenerate the full input line
1511:
1512: my $userinput = $cmd.":".$tail;
1513:
1514: # udom - User's domain.
1515: # uname - Username.
1516: # upass - User's password.
1517:
1518: my ($udom,$uname,$upass)=split(/:/,$tail);
1519: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1520: chomp($upass);
1521: $upass=&unescape($upass);
1522:
1523: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1524: if($pwdcorrect) {
1525: &Reply( $client, "authorized\n", $userinput);
1526: #
1527: # Bad credentials: Failed to authorize
1528: #
1529: } else {
1530: &Failure( $client, "non_authorized\n", $userinput);
1531: }
1532:
1533: return 1;
1534: }
1.263 albertel 1535: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1536:
1.222 foxr 1537: #
1538: # Change a user's password. Note that this function is complicated by
1539: # the fact that a user may be authenticated in more than one way:
1540: # At present, we are not able to change the password for all types of
1541: # authentication methods. Only for:
1542: # unix - unix password or shadow passoword style authentication.
1543: # local - Locally written authentication mechanism.
1544: # For now, kerb4 and kerb5 password changes are not supported and result
1545: # in an error.
1546: # FUTURE WORK:
1547: # Support kerberos passwd changes?
1548: # Parameters:
1549: # $cmd - The command that got us here.
1550: # $tail - Tail of the command (remaining parameters).
1551: # $client - File descriptor connected to client.
1552: # Returns
1553: # 0 - Requested to exit, caller should shut down.
1554: # 1 - Continue processing.
1555: # Implicit inputs:
1556: # The authentication systems describe above have their own forms of implicit
1557: # input into the authentication process that are described above.
1558: sub change_password_handler {
1559: my ($cmd, $tail, $client) = @_;
1560:
1561: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1562:
1563: #
1564: # udom - user's domain.
1565: # uname - Username.
1566: # upass - Current password.
1567: # npass - New password.
1.346 raeburn 1568: # context - Context in which this was called
1569: # (preferences or reset_by_email).
1.222 foxr 1570:
1.346 raeburn 1571: my ($udom,$uname,$upass,$npass,$context)=split(/:/,$tail);
1.222 foxr 1572:
1573: $upass=&unescape($upass);
1574: $npass=&unescape($npass);
1575: &Debug("Trying to change password for $uname");
1576:
1577: # First require that the user can be authenticated with their
1.346 raeburn 1578: # old password unless context was 'reset_by_email':
1579:
1580: my $validated;
1581: if ($context eq 'reset_by_email') {
1582: $validated = 1;
1583: } else {
1584: $validated = &validate_user($udom, $uname, $upass);
1585: }
1.222 foxr 1586: if($validated) {
1587: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1588:
1589: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1590: if ($howpwd eq 'internal') {
1591: &Debug("internal auth");
1592: my $salt=time;
1593: $salt=substr($salt,6,2);
1594: my $ncpass=crypt($npass,$salt);
1595: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1596: &logthis("Result of password change for "
1597: ."$uname: pwchange_success");
1598: &Reply($client, "ok\n", $userinput);
1599: } else {
1600: &logthis("Unable to open $uname passwd "
1601: ."to change password");
1602: &Failure( $client, "non_authorized\n",$userinput);
1603: }
1.346 raeburn 1604: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1.287 foxr 1605: my $result = &change_unix_password($uname, $npass);
1.222 foxr 1606: &logthis("Result of password change for $uname: ".
1.287 foxr 1607: $result);
1.387 albertel 1608: &Reply($client, \$result, $userinput);
1.222 foxr 1609: } else {
1610: # this just means that the current password mode is not
1611: # one we know how to change (e.g the kerberos auth modes or
1612: # locally written auth handler).
1613: #
1614: &Failure( $client, "auth_mode_error\n", $userinput);
1615: }
1616:
1.224 foxr 1617: } else {
1.222 foxr 1618: &Failure( $client, "non_authorized\n", $userinput);
1619: }
1620:
1621: return 1;
1622: }
1.263 albertel 1623: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1624:
1.225 foxr 1625: #
1626: # Create a new user. User in this case means a lon-capa user.
1627: # The user must either already exist in some authentication realm
1628: # like kerberos or the /etc/passwd. If not, a user completely local to
1629: # this loncapa system is created.
1630: #
1631: # Parameters:
1632: # $cmd - The command that got us here.
1633: # $tail - Tail of the command (remaining parameters).
1634: # $client - File descriptor connected to client.
1635: # Returns
1636: # 0 - Requested to exit, caller should shut down.
1637: # 1 - Continue processing.
1638: # Implicit inputs:
1639: # The authentication systems describe above have their own forms of implicit
1640: # input into the authentication process that are described above.
1641: sub add_user_handler {
1642:
1643: my ($cmd, $tail, $client) = @_;
1644:
1645:
1646: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1647: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1648:
1649: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1650:
1651:
1652: if($udom eq $currentdomainid) { # Reject new users for other domains...
1653:
1654: my $oldumask=umask(0077);
1655: chomp($npass);
1656: $npass=&unescape($npass);
1657: my $passfilename = &password_path($udom, $uname);
1658: &Debug("Password file created will be:".$passfilename);
1659: if (-e $passfilename) {
1660: &Failure( $client, "already_exists\n", $userinput);
1661: } else {
1662: my $fperror='';
1.264 albertel 1663: if (!&mkpath($passfilename)) {
1664: $fperror="error: ".($!+0)." mkdir failed while attempting "
1665: ."makeuser";
1.225 foxr 1666: }
1667: unless ($fperror) {
1668: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1.390 raeburn 1669: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
1.225 foxr 1670: } else {
1.387 albertel 1671: &Failure($client, \$fperror, $userinput);
1.225 foxr 1672: }
1673: }
1674: umask($oldumask);
1675: } else {
1676: &Failure($client, "not_right_domain\n",
1677: $userinput); # Even if we are multihomed.
1678:
1679: }
1680: return 1;
1681:
1682: }
1683: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1684:
1685: #
1686: # Change the authentication method of a user. Note that this may
1687: # also implicitly change the user's password if, for example, the user is
1688: # joining an existing authentication realm. Known authentication realms at
1689: # this time are:
1690: # internal - Purely internal password file (only loncapa knows this user)
1691: # local - Institutionally written authentication module.
1692: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1693: # kerb4 - kerberos version 4
1694: # kerb5 - kerberos version 5
1695: #
1696: # Parameters:
1697: # $cmd - The command that got us here.
1698: # $tail - Tail of the command (remaining parameters).
1699: # $client - File descriptor connected to client.
1700: # Returns
1701: # 0 - Requested to exit, caller should shut down.
1702: # 1 - Continue processing.
1703: # Implicit inputs:
1704: # The authentication systems describe above have their own forms of implicit
1705: # input into the authentication process that are described above.
1.287 foxr 1706: # NOTE:
1707: # This is also used to change the authentication credential values (e.g. passwd).
1708: #
1.225 foxr 1709: #
1710: sub change_authentication_handler {
1711:
1712: my ($cmd, $tail, $client) = @_;
1713:
1714: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1715:
1716: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1717: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1718: if ($udom ne $currentdomainid) {
1719: &Failure( $client, "not_right_domain\n", $client);
1720: } else {
1721:
1722: chomp($npass);
1723:
1724: $npass=&unescape($npass);
1.261 foxr 1725: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1726: my $passfilename = &password_path($udom, $uname);
1727: if ($passfilename) { # Not allowed to create a new user!!
1.287 foxr 1728: # If just changing the unix passwd. need to arrange to run
1729: # passwd since otherwise make_passwd_file will run
1730: # lcuseradd which fails if an account already exists
1731: # (to prevent an unscrupulous LONCAPA admin from stealing
1732: # an existing account by overwriting it as a LonCAPA account).
1733:
1734: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1735: my $result = &change_unix_password($uname, $npass);
1736: &logthis("Result of password change for $uname: ".$result);
1737: if ($result eq "ok") {
1.390 raeburn 1738: &Reply($client, \$result);
1.288 albertel 1739: } else {
1.387 albertel 1740: &Failure($client, \$result);
1.287 foxr 1741: }
1.288 albertel 1742: } else {
1.287 foxr 1743: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1744: #
1745: # If the current auth mode is internal, and the old auth mode was
1746: # unix, or krb*, and the user is an author for this domain,
1747: # re-run manage_permissions for that role in order to be able
1748: # to take ownership of the construction space back to www:www
1749: #
1750:
1751:
1752: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
1753: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1754: if(&is_author($udom, $uname)) {
1755: &Debug(" Need to manage author permissions...");
1756: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1757: }
1.261 foxr 1758: }
1.387 albertel 1759: &Reply($client, \$result, $userinput);
1.261 foxr 1760: }
1761:
1762:
1.225 foxr 1763: } else {
1.251 foxr 1764: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1765: }
1766: }
1767: return 1;
1768: }
1769: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1770:
1771: #
1772: # Determines if this is the home server for a user. The home server
1773: # for a user will have his/her lon-capa passwd file. Therefore all we need
1774: # to do is determine if this file exists.
1775: #
1776: # Parameters:
1777: # $cmd - The command that got us here.
1778: # $tail - Tail of the command (remaining parameters).
1779: # $client - File descriptor connected to client.
1780: # Returns
1781: # 0 - Requested to exit, caller should shut down.
1782: # 1 - Continue processing.
1783: # Implicit inputs:
1784: # The authentication systems describe above have their own forms of implicit
1785: # input into the authentication process that are described above.
1786: #
1787: sub is_home_handler {
1788: my ($cmd, $tail, $client) = @_;
1789:
1790: my $userinput = "$cmd:$tail";
1791:
1792: my ($udom,$uname)=split(/:/,$tail);
1793: chomp($uname);
1794: my $passfile = &password_filename($udom, $uname);
1795: if($passfile) {
1796: &Reply( $client, "found\n", $userinput);
1797: } else {
1798: &Failure($client, "not_found\n", $userinput);
1799: }
1800: return 1;
1801: }
1802: ®ister_handler("home", \&is_home_handler, 0,1,0);
1803:
1804: #
1805: # Process an update request for a resource?? I think what's going on here is
1806: # that a resource has been modified that we hold a subscription to.
1807: # If the resource is not local, then we must update, or at least invalidate our
1808: # cached copy of the resource.
1809: # FUTURE WORK:
1810: # I need to look at this logic carefully. My druthers would be to follow
1811: # typical caching logic, and simple invalidate the cache, drop any subscription
1812: # an let the next fetch start the ball rolling again... however that may
1813: # actually be more difficult than it looks given the complex web of
1814: # proxy servers.
1815: # Parameters:
1816: # $cmd - The command that got us here.
1817: # $tail - Tail of the command (remaining parameters).
1818: # $client - File descriptor connected to client.
1819: # Returns
1820: # 0 - Requested to exit, caller should shut down.
1821: # 1 - Continue processing.
1822: # Implicit inputs:
1823: # The authentication systems describe above have their own forms of implicit
1824: # input into the authentication process that are described above.
1825: #
1826: sub update_resource_handler {
1827:
1828: my ($cmd, $tail, $client) = @_;
1829:
1830: my $userinput = "$cmd:$tail";
1831:
1832: my $fname= $tail; # This allows interactive testing
1833:
1834:
1835: my $ownership=ishome($fname);
1836: if ($ownership eq 'not_owner') {
1837: if (-e $fname) {
1838: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1839: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1840: my $now=time;
1841: my $since=$now-$atime;
1842: if ($since>$perlvar{'lonExpire'}) {
1.365 albertel 1843: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
1.308 albertel 1844: &devalidate_meta_cache($fname);
1.225 foxr 1845: unlink("$fname");
1.334 albertel 1846: unlink("$fname.meta");
1.225 foxr 1847: } else {
1848: my $transname="$fname.in.transfer";
1.365 albertel 1849: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
1.225 foxr 1850: my $response;
1851: alarm(120);
1852: {
1853: my $ua=new LWP::UserAgent;
1854: my $request=new HTTP::Request('GET',"$remoteurl");
1855: $response=$ua->request($request,$transname);
1856: }
1857: alarm(0);
1858: if ($response->is_error()) {
1859: unlink($transname);
1860: my $message=$response->status_line;
1861: &logthis("LWP GET: $message for $fname ($remoteurl)");
1862: } else {
1863: if ($remoteurl!~/\.meta$/) {
1864: alarm(120);
1865: {
1866: my $ua=new LWP::UserAgent;
1867: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1868: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1869: if ($mresponse->is_error()) {
1870: unlink($fname.'.meta');
1871: }
1872: }
1873: alarm(0);
1874: }
1875: rename($transname,$fname);
1.308 albertel 1876: &devalidate_meta_cache($fname);
1.225 foxr 1877: }
1878: }
1879: &Reply( $client, "ok\n", $userinput);
1880: } else {
1881: &Failure($client, "not_found\n", $userinput);
1882: }
1883: } else {
1884: &Failure($client, "rejected\n", $userinput);
1885: }
1886: return 1;
1887: }
1888: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1889:
1.308 albertel 1890: sub devalidate_meta_cache {
1891: my ($url) = @_;
1892: use Cache::Memcached;
1893: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1.365 albertel 1894: $url = &Apache::lonnet::declutter($url);
1.308 albertel 1895: $url =~ s-\.meta$--;
1896: my $id = &escape('meta:'.$url);
1897: $memcache->delete($id);
1898: }
1899:
1.225 foxr 1900: #
1.226 foxr 1901: # Fetch a user file from a remote server to the user's home directory
1902: # userfiles subdir.
1.225 foxr 1903: # Parameters:
1904: # $cmd - The command that got us here.
1905: # $tail - Tail of the command (remaining parameters).
1906: # $client - File descriptor connected to client.
1907: # Returns
1908: # 0 - Requested to exit, caller should shut down.
1909: # 1 - Continue processing.
1910: #
1911: sub fetch_user_file_handler {
1912:
1913: my ($cmd, $tail, $client) = @_;
1914:
1915: my $userinput = "$cmd:$tail";
1916: my $fname = $tail;
1.232 foxr 1917: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1918: my $udir=&propath($udom,$uname).'/userfiles';
1919: unless (-e $udir) {
1920: mkdir($udir,0770);
1921: }
1.232 foxr 1922: Debug("fetch user file for $fname");
1.225 foxr 1923: if (-e $udir) {
1924: $ufile=~s/^[\.\~]+//;
1.232 foxr 1925:
1926: # IF necessary, create the path right down to the file.
1927: # Note that any regular files in the way of this path are
1928: # wiped out to deal with some earlier folly of mine.
1929:
1.267 raeburn 1930: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 1931: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 1932: }
1933:
1.225 foxr 1934: my $destname=$udir.'/'.$ufile;
1935: my $transname=$udir.'/'.$ufile.'.in.transit';
1936: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1937: my $response;
1.232 foxr 1938: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1939: alarm(120);
1940: {
1941: my $ua=new LWP::UserAgent;
1942: my $request=new HTTP::Request('GET',"$remoteurl");
1943: $response=$ua->request($request,$transname);
1944: }
1945: alarm(0);
1946: if ($response->is_error()) {
1947: unlink($transname);
1948: my $message=$response->status_line;
1949: &logthis("LWP GET: $message for $fname ($remoteurl)");
1950: &Failure($client, "failed\n", $userinput);
1951: } else {
1.232 foxr 1952: Debug("Renaming $transname to $destname");
1.225 foxr 1953: if (!rename($transname,$destname)) {
1954: &logthis("Unable to move $transname to $destname");
1955: unlink($transname);
1956: &Failure($client, "failed\n", $userinput);
1957: } else {
1958: &Reply($client, "ok\n", $userinput);
1959: }
1960: }
1961: } else {
1962: &Failure($client, "not_home\n", $userinput);
1963: }
1964: return 1;
1965: }
1966: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1967:
1.226 foxr 1968: #
1969: # Remove a file from a user's home directory userfiles subdirectory.
1970: # Parameters:
1971: # cmd - the Lond request keyword that got us here.
1972: # tail - the part of the command past the keyword.
1973: # client- File descriptor connected with the client.
1974: #
1975: # Returns:
1976: # 1 - Continue processing.
1977: sub remove_user_file_handler {
1978: my ($cmd, $tail, $client) = @_;
1979:
1980: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1981:
1982: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1983: if ($ufile =~m|/\.\./|) {
1984: # any files paths with /../ in them refuse
1985: # to deal with
1986: &Failure($client, "refused\n", "$cmd:$tail");
1987: } else {
1988: my $udir = &propath($udom,$uname);
1989: if (-e $udir) {
1990: my $file=$udir.'/userfiles/'.$ufile;
1991: if (-e $file) {
1.253 foxr 1992: #
1993: # If the file is a regular file unlink is fine...
1994: # However it's possible the client wants a dir.
1995: # removed, in which case rmdir is more approprate:
1996: #
1.240 banghart 1997: if (-f $file){
1.241 albertel 1998: unlink($file);
1999: } elsif(-d $file) {
2000: rmdir($file);
1.240 banghart 2001: }
1.226 foxr 2002: if (-e $file) {
1.253 foxr 2003: # File is still there after we deleted it ?!?
2004:
1.226 foxr 2005: &Failure($client, "failed\n", "$cmd:$tail");
2006: } else {
2007: &Reply($client, "ok\n", "$cmd:$tail");
2008: }
2009: } else {
2010: &Failure($client, "not_found\n", "$cmd:$tail");
2011: }
2012: } else {
2013: &Failure($client, "not_home\n", "$cmd:$tail");
2014: }
2015: }
2016: return 1;
2017: }
2018: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2019:
1.236 albertel 2020: #
2021: # make a directory in a user's home directory userfiles subdirectory.
2022: # Parameters:
2023: # cmd - the Lond request keyword that got us here.
2024: # tail - the part of the command past the keyword.
2025: # client- File descriptor connected with the client.
2026: #
2027: # Returns:
2028: # 1 - Continue processing.
2029: sub mkdir_user_file_handler {
2030: my ($cmd, $tail, $client) = @_;
2031:
2032: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2033: $dir=&unescape($dir);
2034: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2035: if ($ufile =~m|/\.\./|) {
2036: # any files paths with /../ in them refuse
2037: # to deal with
2038: &Failure($client, "refused\n", "$cmd:$tail");
2039: } else {
2040: my $udir = &propath($udom,$uname);
2041: if (-e $udir) {
1.264 albertel 2042: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2043: if (!&mkpath($newdir)) {
2044: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2045: }
1.264 albertel 2046: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2047: } else {
2048: &Failure($client, "not_home\n", "$cmd:$tail");
2049: }
2050: }
2051: return 1;
2052: }
2053: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2054:
1.237 albertel 2055: #
2056: # rename a file in a user's home directory userfiles subdirectory.
2057: # Parameters:
2058: # cmd - the Lond request keyword that got us here.
2059: # tail - the part of the command past the keyword.
2060: # client- File descriptor connected with the client.
2061: #
2062: # Returns:
2063: # 1 - Continue processing.
2064: sub rename_user_file_handler {
2065: my ($cmd, $tail, $client) = @_;
2066:
2067: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2068: $old=&unescape($old);
2069: $new=&unescape($new);
2070: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2071: # any files paths with /../ in them refuse to deal with
2072: &Failure($client, "refused\n", "$cmd:$tail");
2073: } else {
2074: my $udir = &propath($udom,$uname);
2075: if (-e $udir) {
2076: my $oldfile=$udir.'/userfiles/'.$old;
2077: my $newfile=$udir.'/userfiles/'.$new;
2078: if (-e $newfile) {
2079: &Failure($client, "exists\n", "$cmd:$tail");
2080: } elsif (! -e $oldfile) {
2081: &Failure($client, "not_found\n", "$cmd:$tail");
2082: } else {
2083: if (!rename($oldfile,$newfile)) {
2084: &Failure($client, "failed\n", "$cmd:$tail");
2085: } else {
2086: &Reply($client, "ok\n", "$cmd:$tail");
2087: }
2088: }
2089: } else {
2090: &Failure($client, "not_home\n", "$cmd:$tail");
2091: }
2092: }
2093: return 1;
2094: }
2095: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2096:
1.227 foxr 2097: #
1.382 albertel 2098: # Checks if the specified user has an active session on the server
2099: # return ok if so, not_found if not
2100: #
2101: # Parameters:
2102: # cmd - The request keyword that dispatched to tus.
2103: # tail - The tail of the request (colon separated parameters).
2104: # client - Filehandle open on the client.
2105: # Return:
2106: # 1.
2107: sub user_has_session_handler {
2108: my ($cmd, $tail, $client) = @_;
2109:
2110: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2111:
2112: &logthis("Looking for $udom $uname");
2113: opendir(DIR,$perlvar{'lonIDsDir'});
2114: my $filename;
2115: while ($filename=readdir(DIR)) {
2116: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2117: }
2118: if ($filename) {
2119: &Reply($client, "ok\n", "$cmd:$tail");
2120: } else {
2121: &Failure($client, "not_found\n", "$cmd:$tail");
2122: }
2123: return 1;
2124:
2125: }
2126: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2127:
2128: #
1.263 albertel 2129: # Authenticate access to a user file by checking that the token the user's
2130: # passed also exists in their session file
1.227 foxr 2131: #
2132: # Parameters:
2133: # cmd - The request keyword that dispatched to tus.
2134: # tail - The tail of the request (colon separated parameters).
2135: # client - Filehandle open on the client.
2136: # Return:
2137: # 1.
2138: sub token_auth_user_file_handler {
2139: my ($cmd, $tail, $client) = @_;
2140:
2141: my ($fname, $session) = split(/:/, $tail);
2142:
2143: chomp($session);
1.393 raeburn 2144: my $reply="non_auth";
1.343 albertel 2145: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2146: if (open(ENVIN,"$file")) {
1.332 albertel 2147: flock(ENVIN,LOCK_SH);
1.343 albertel 2148: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2149: if (exists($disk_env{"userfile.$fname"})) {
1.393 raeburn 2150: $reply="ok";
1.343 albertel 2151: } else {
2152: foreach my $envname (keys(%disk_env)) {
2153: if ($envname=~ m|^userfile\.\Q$fname\E|) {
1.393 raeburn 2154: $reply="ok";
1.343 albertel 2155: last;
2156: }
2157: }
1.227 foxr 2158: }
1.343 albertel 2159: untie(%disk_env);
1.227 foxr 2160: close(ENVIN);
1.387 albertel 2161: &Reply($client, \$reply, "$cmd:$tail");
1.227 foxr 2162: } else {
2163: &Failure($client, "invalid_token\n", "$cmd:$tail");
2164: }
2165: return 1;
2166:
2167: }
2168: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2169:
2170: #
2171: # Unsubscribe from a resource.
2172: #
2173: # Parameters:
2174: # $cmd - The command that got us here.
2175: # $tail - Tail of the command (remaining parameters).
2176: # $client - File descriptor connected to client.
2177: # Returns
2178: # 0 - Requested to exit, caller should shut down.
2179: # 1 - Continue processing.
2180: #
2181: sub unsubscribe_handler {
2182: my ($cmd, $tail, $client) = @_;
2183:
2184: my $userinput= "$cmd:$tail";
2185:
2186: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2187:
2188: &Debug("Unsubscribing $fname");
2189: if (-e $fname) {
2190: &Debug("Exists");
2191: &Reply($client, &unsub($fname,$clientip), $userinput);
2192: } else {
2193: &Failure($client, "not_found\n", $userinput);
2194: }
2195: return 1;
2196: }
2197: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2198:
1.230 foxr 2199: # Subscribe to a resource
2200: #
2201: # Parameters:
2202: # $cmd - The command that got us here.
2203: # $tail - Tail of the command (remaining parameters).
2204: # $client - File descriptor connected to client.
2205: # Returns
2206: # 0 - Requested to exit, caller should shut down.
2207: # 1 - Continue processing.
2208: #
2209: sub subscribe_handler {
2210: my ($cmd, $tail, $client)= @_;
2211:
2212: my $userinput = "$cmd:$tail";
2213:
2214: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2215:
2216: return 1;
2217: }
2218: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2219:
2220: #
1.379 albertel 2221: # Determine the latest version of a resource (it looks for the highest
2222: # past version and then returns that +1)
1.230 foxr 2223: #
2224: # Parameters:
2225: # $cmd - The command that got us here.
2226: # $tail - Tail of the command (remaining parameters).
1.379 albertel 2227: # (Should consist of an absolute path to a file)
1.230 foxr 2228: # $client - File descriptor connected to client.
2229: # Returns
2230: # 0 - Requested to exit, caller should shut down.
2231: # 1 - Continue processing.
2232: #
2233: sub current_version_handler {
2234: my ($cmd, $tail, $client) = @_;
2235:
2236: my $userinput= "$cmd:$tail";
2237:
2238: my $fname = $tail;
2239: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2240: return 1;
2241:
2242: }
2243: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2244:
2245: # Make an entry in a user's activity log.
2246: #
2247: # Parameters:
2248: # $cmd - The command that got us here.
2249: # $tail - Tail of the command (remaining parameters).
2250: # $client - File descriptor connected to client.
2251: # Returns
2252: # 0 - Requested to exit, caller should shut down.
2253: # 1 - Continue processing.
2254: #
2255: sub activity_log_handler {
2256: my ($cmd, $tail, $client) = @_;
2257:
2258:
2259: my $userinput= "$cmd:$tail";
2260:
2261: my ($udom,$uname,$what)=split(/:/,$tail);
2262: chomp($what);
2263: my $proname=&propath($udom,$uname);
2264: my $now=time;
2265: my $hfh;
2266: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2267: print $hfh "$now:$clientname:$what\n";
2268: &Reply( $client, "ok\n", $userinput);
2269: } else {
2270: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2271: ."while attempting log\n",
2272: $userinput);
2273: }
2274:
2275: return 1;
2276: }
1.263 albertel 2277: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2278:
2279: #
2280: # Put a namespace entry in a user profile hash.
2281: # My druthers would be for this to be an encrypted interaction too.
2282: # anything that might be an inadvertent covert channel about either
2283: # user authentication or user personal information....
2284: #
2285: # Parameters:
2286: # $cmd - The command that got us here.
2287: # $tail - Tail of the command (remaining parameters).
2288: # $client - File descriptor connected to client.
2289: # Returns
2290: # 0 - Requested to exit, caller should shut down.
2291: # 1 - Continue processing.
2292: #
2293: sub put_user_profile_entry {
2294: my ($cmd, $tail, $client) = @_;
1.229 foxr 2295:
1.230 foxr 2296: my $userinput = "$cmd:$tail";
2297:
1.242 raeburn 2298: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2299: if ($namespace ne 'roles') {
2300: chomp($what);
2301: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2302: &GDBM_WRCREAT(),"P",$what);
2303: if($hashref) {
2304: my @pairs=split(/\&/,$what);
2305: foreach my $pair (@pairs) {
2306: my ($key,$value)=split(/=/,$pair);
2307: $hashref->{$key}=$value;
2308: }
1.311 albertel 2309: if (&untie_user_hash($hashref)) {
1.230 foxr 2310: &Reply( $client, "ok\n", $userinput);
2311: } else {
2312: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2313: "while attempting put\n",
2314: $userinput);
2315: }
2316: } else {
1.316 albertel 2317: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230 foxr 2318: "while attempting put\n", $userinput);
2319: }
2320: } else {
2321: &Failure( $client, "refused\n", $userinput);
2322: }
2323:
2324: return 1;
2325: }
2326: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2327:
1.283 albertel 2328: # Put a piece of new data in hash, returns error if entry already exists
2329: # Parameters:
2330: # $cmd - The command that got us here.
2331: # $tail - Tail of the command (remaining parameters).
2332: # $client - File descriptor connected to client.
2333: # Returns
2334: # 0 - Requested to exit, caller should shut down.
2335: # 1 - Continue processing.
2336: #
2337: sub newput_user_profile_entry {
2338: my ($cmd, $tail, $client) = @_;
2339:
2340: my $userinput = "$cmd:$tail";
2341:
2342: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2343: if ($namespace eq 'roles') {
2344: &Failure( $client, "refused\n", $userinput);
2345: return 1;
2346: }
2347:
2348: chomp($what);
2349:
2350: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2351: &GDBM_WRCREAT(),"N",$what);
2352: if(!$hashref) {
1.316 albertel 2353: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283 albertel 2354: "while attempting put\n", $userinput);
2355: return 1;
2356: }
2357:
2358: my @pairs=split(/\&/,$what);
2359: foreach my $pair (@pairs) {
2360: my ($key,$value)=split(/=/,$pair);
2361: if (exists($hashref->{$key})) {
2362: &Failure($client, "key_exists: ".$key."\n",$userinput);
2363: return 1;
2364: }
2365: }
2366:
2367: foreach my $pair (@pairs) {
2368: my ($key,$value)=split(/=/,$pair);
2369: $hashref->{$key}=$value;
2370: }
2371:
1.311 albertel 2372: if (&untie_user_hash($hashref)) {
1.283 albertel 2373: &Reply( $client, "ok\n", $userinput);
2374: } else {
2375: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2376: "while attempting put\n",
2377: $userinput);
2378: }
2379: return 1;
2380: }
2381: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2382:
1.230 foxr 2383: #
2384: # Increment a profile entry in the user history file.
2385: # The history contains keyword value pairs. In this case,
2386: # The value itself is a pair of numbers. The first, the current value
2387: # the second an increment that this function applies to the current
2388: # value.
2389: #
2390: # Parameters:
2391: # $cmd - The command that got us here.
2392: # $tail - Tail of the command (remaining parameters).
2393: # $client - File descriptor connected to client.
2394: # Returns
2395: # 0 - Requested to exit, caller should shut down.
2396: # 1 - Continue processing.
2397: #
2398: sub increment_user_value_handler {
2399: my ($cmd, $tail, $client) = @_;
2400:
2401: my $userinput = "$cmd:$tail";
2402:
2403: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2404: if ($namespace ne 'roles') {
2405: chomp($what);
2406: my $hashref = &tie_user_hash($udom, $uname,
2407: $namespace, &GDBM_WRCREAT(),
2408: "P",$what);
2409: if ($hashref) {
2410: my @pairs=split(/\&/,$what);
2411: foreach my $pair (@pairs) {
2412: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2413: $value = &unescape($value);
1.230 foxr 2414: # We could check that we have a number...
2415: if (! defined($value) || $value eq '') {
2416: $value = 1;
2417: }
2418: $hashref->{$key}+=$value;
1.284 raeburn 2419: if ($namespace eq 'nohist_resourcetracker') {
2420: if ($hashref->{$key} < 0) {
2421: $hashref->{$key} = 0;
2422: }
2423: }
1.230 foxr 2424: }
1.311 albertel 2425: if (&untie_user_hash($hashref)) {
1.230 foxr 2426: &Reply( $client, "ok\n", $userinput);
2427: } else {
2428: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2429: "while attempting inc\n", $userinput);
2430: }
2431: } else {
2432: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2433: "while attempting inc\n", $userinput);
2434: }
2435: } else {
2436: &Failure($client, "refused\n", $userinput);
2437: }
2438:
2439: return 1;
2440: }
2441: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2442:
2443: #
2444: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2445: # Each 'role' a user has implies a set of permissions. Adding a new role
2446: # for a person grants the permissions packaged with that role
2447: # to that user when the role is selected.
2448: #
2449: # Parameters:
2450: # $cmd - The command string (rolesput).
2451: # $tail - The remainder of the request line. For rolesput this
2452: # consists of a colon separated list that contains:
2453: # The domain and user that is granting the role (logged).
2454: # The domain and user that is getting the role.
2455: # The roles being granted as a set of & separated pairs.
2456: # each pair a key value pair.
2457: # $client - File descriptor connected to the client.
2458: # Returns:
2459: # 0 - If the daemon should exit
2460: # 1 - To continue processing.
2461: #
2462: #
2463: sub roles_put_handler {
2464: my ($cmd, $tail, $client) = @_;
2465:
2466: my $userinput = "$cmd:$tail";
2467:
2468: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2469:
2470:
2471: my $namespace='roles';
2472: chomp($what);
2473: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2474: &GDBM_WRCREAT(), "P",
2475: "$exedom:$exeuser:$what");
2476: #
2477: # Log the attempt to set a role. The {}'s here ensure that the file
2478: # handle is open for the minimal amount of time. Since the flush
2479: # is done on close this improves the chances the log will be an un-
2480: # corrupted ordered thing.
2481: if ($hashref) {
1.261 foxr 2482: my $pass_entry = &get_auth_type($udom, $uname);
2483: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2484: $auth_type = $auth_type.":";
1.230 foxr 2485: my @pairs=split(/\&/,$what);
2486: foreach my $pair (@pairs) {
2487: my ($key,$value)=split(/=/,$pair);
2488: &manage_permissions($key, $udom, $uname,
1.260 foxr 2489: $auth_type);
1.230 foxr 2490: $hashref->{$key}=$value;
2491: }
1.311 albertel 2492: if (&untie_user_hash($hashref)) {
1.230 foxr 2493: &Reply($client, "ok\n", $userinput);
2494: } else {
2495: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2496: "while attempting rolesput\n", $userinput);
2497: }
2498: } else {
2499: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2500: "while attempting rolesput\n", $userinput);
2501: }
2502: return 1;
2503: }
2504: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2505:
2506: #
1.231 foxr 2507: # Deletes (removes) a role for a user. This is equivalent to removing
2508: # a permissions package associated with the role from the user's profile.
2509: #
2510: # Parameters:
2511: # $cmd - The command (rolesdel)
2512: # $tail - The remainder of the request line. This consists
2513: # of:
2514: # The domain and user requesting the change (logged)
2515: # The domain and user being changed.
2516: # The roles being revoked. These are shipped to us
2517: # as a bunch of & separated role name keywords.
2518: # $client - The file handle open on the client.
2519: # Returns:
2520: # 1 - Continue processing
2521: # 0 - Exit.
2522: #
2523: sub roles_delete_handler {
2524: my ($cmd, $tail, $client) = @_;
2525:
2526: my $userinput = "$cmd:$tail";
2527:
2528: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2529: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2530: "what = ".$what);
2531: my $namespace='roles';
2532: chomp($what);
2533: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2534: &GDBM_WRCREAT(), "D",
2535: "$exedom:$exeuser:$what");
2536:
2537: if ($hashref) {
2538: my @rolekeys=split(/\&/,$what);
2539:
2540: foreach my $key (@rolekeys) {
2541: delete $hashref->{$key};
2542: }
1.315 albertel 2543: if (&untie_user_hash($hashref)) {
1.231 foxr 2544: &Reply($client, "ok\n", $userinput);
2545: } else {
2546: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2547: "while attempting rolesdel\n", $userinput);
2548: }
2549: } else {
2550: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2551: "while attempting rolesdel\n", $userinput);
2552: }
2553:
2554: return 1;
2555: }
2556: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2557:
2558: # Unencrypted get from a user's profile database. See
2559: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2560: # This function retrieves a keyed item from a specific named database in the
2561: # user's directory.
2562: #
2563: # Parameters:
2564: # $cmd - Command request keyword (get).
2565: # $tail - Tail of the command. This is a colon separated list
2566: # consisting of the domain and username that uniquely
2567: # identifies the profile,
2568: # The 'namespace' which selects the gdbm file to
2569: # do the lookup in,
2570: # & separated list of keys to lookup. Note that
2571: # the values are returned as an & separated list too.
2572: # $client - File descriptor open on the client.
2573: # Returns:
2574: # 1 - Continue processing.
2575: # 0 - Exit.
2576: #
2577: sub get_profile_entry {
2578: my ($cmd, $tail, $client) = @_;
2579:
2580: my $userinput= "$cmd:$tail";
2581:
2582: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2583: chomp($what);
1.255 foxr 2584:
1.390 raeburn 2585:
1.255 foxr 2586: my $replystring = read_profile($udom, $uname, $namespace, $what);
2587: my ($first) = split(/:/,$replystring);
2588: if($first ne "error") {
1.387 albertel 2589: &Reply($client, \$replystring, $userinput);
1.231 foxr 2590: } else {
1.255 foxr 2591: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2592: }
2593: return 1;
1.255 foxr 2594:
2595:
1.231 foxr 2596: }
2597: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2598:
2599: #
2600: # Process the encrypted get request. Note that the request is sent
2601: # in clear, but the reply is encrypted. This is a small covert channel:
2602: # information about the sensitive keys is given to the snooper. Just not
2603: # information about the values of the sensitive key. Hmm if I wanted to
2604: # know these I'd snoop for the egets. Get the profile item names from them
2605: # and then issue a get for them since there's no enforcement of the
2606: # requirement of an encrypted get for particular profile items. If I
2607: # were re-doing this, I'd force the request to be encrypted as well as the
2608: # reply. I'd also just enforce encrypted transactions for all gets since
2609: # that would prevent any covert channel snooping.
2610: #
2611: # Parameters:
2612: # $cmd - Command keyword of request (eget).
2613: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2614: # $client - File open on the client.
2615: # Returns:
2616: # 1 - Continue processing
2617: # 0 - server should exit.
2618: sub get_profile_entry_encrypted {
2619: my ($cmd, $tail, $client) = @_;
2620:
2621: my $userinput = "$cmd:$tail";
2622:
1.339 albertel 2623: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1.231 foxr 2624: chomp($what);
1.255 foxr 2625: my $qresult = read_profile($udom, $uname, $namespace, $what);
2626: my ($first) = split(/:/, $qresult);
2627: if($first ne "error") {
2628:
2629: if ($cipher) {
2630: my $cmdlength=length($qresult);
2631: $qresult.=" ";
2632: my $encqresult='';
2633: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2634: $encqresult.= unpack("H16",
2635: $cipher->encrypt(substr($qresult,
2636: $encidx,
2637: 8)));
2638: }
2639: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2640: } else {
1.231 foxr 2641: &Failure( $client, "error:no_key\n", $userinput);
2642: }
2643: } else {
1.255 foxr 2644: &Failure($client, "$qresult while attempting eget\n", $userinput);
2645:
1.231 foxr 2646: }
2647:
2648: return 1;
2649: }
1.255 foxr 2650: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2651:
1.231 foxr 2652: #
2653: # Deletes a key in a user profile database.
2654: #
2655: # Parameters:
2656: # $cmd - Command keyword (del).
2657: # $tail - Command tail. IN this case a colon
2658: # separated list containing:
2659: # The domain and user that identifies uniquely
2660: # the identity of the user.
2661: # The profile namespace (name of the profile
2662: # database file).
2663: # & separated list of keywords to delete.
2664: # $client - File open on client socket.
2665: # Returns:
2666: # 1 - Continue processing
2667: # 0 - Exit server.
2668: #
2669: #
2670: sub delete_profile_entry {
2671: my ($cmd, $tail, $client) = @_;
2672:
2673: my $userinput = "cmd:$tail";
2674:
2675: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2676: chomp($what);
2677: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2678: &GDBM_WRCREAT(),
2679: "D",$what);
2680: if ($hashref) {
2681: my @keys=split(/\&/,$what);
2682: foreach my $key (@keys) {
2683: delete($hashref->{$key});
2684: }
1.315 albertel 2685: if (&untie_user_hash($hashref)) {
1.231 foxr 2686: &Reply($client, "ok\n", $userinput);
2687: } else {
2688: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2689: "while attempting del\n", $userinput);
2690: }
2691: } else {
2692: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2693: "while attempting del\n", $userinput);
2694: }
2695: return 1;
2696: }
2697: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2698:
1.231 foxr 2699: #
2700: # List the set of keys that are defined in a profile database file.
2701: # A successful reply from this will contain an & separated list of
2702: # the keys.
2703: # Parameters:
2704: # $cmd - Command request (keys).
2705: # $tail - Remainder of the request, a colon separated
2706: # list containing domain/user that identifies the
2707: # user being queried, and the database namespace
2708: # (database filename essentially).
2709: # $client - File open on the client.
2710: # Returns:
2711: # 1 - Continue processing.
2712: # 0 - Exit the server.
2713: #
2714: sub get_profile_keys {
2715: my ($cmd, $tail, $client) = @_;
2716:
2717: my $userinput = "$cmd:$tail";
2718:
2719: my ($udom,$uname,$namespace)=split(/:/,$tail);
2720: my $qresult='';
2721: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2722: &GDBM_READER());
2723: if ($hashref) {
2724: foreach my $key (keys %$hashref) {
2725: $qresult.="$key&";
2726: }
1.315 albertel 2727: if (&untie_user_hash($hashref)) {
1.231 foxr 2728: $qresult=~s/\&$//;
1.387 albertel 2729: &Reply($client, \$qresult, $userinput);
1.231 foxr 2730: } else {
2731: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2732: "while attempting keys\n", $userinput);
2733: }
2734: } else {
2735: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2736: "while attempting keys\n", $userinput);
2737: }
2738:
2739: return 1;
2740: }
2741: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2742:
2743: #
2744: # Dump the contents of a user profile database.
2745: # Note that this constitutes a very large covert channel too since
2746: # the dump will return sensitive information that is not encrypted.
2747: # The naive security assumption is that the session negotiation ensures
2748: # our client is trusted and I don't believe that's assured at present.
2749: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2750: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2751: #
2752: # Parameters:
2753: # $cmd - The command request keyword (currentdump).
2754: # $tail - Remainder of the request, consisting of a colon
2755: # separated list that has the domain/username and
2756: # the namespace to dump (database file).
2757: # $client - file open on the remote client.
2758: # Returns:
2759: # 1 - Continue processing.
2760: # 0 - Exit the server.
2761: #
2762: sub dump_profile_database {
2763: my ($cmd, $tail, $client) = @_;
2764:
2765: my $userinput = "$cmd:$tail";
2766:
2767: my ($udom,$uname,$namespace) = split(/:/,$tail);
2768: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2769: &GDBM_READER());
2770: if ($hashref) {
2771: # Structure of %data:
2772: # $data{$symb}->{$parameter}=$value;
2773: # $data{$symb}->{'v.'.$parameter}=$version;
2774: # since $parameter will be unescaped, we do not
2775: # have to worry about silly parameter names...
2776:
2777: my $qresult='';
2778: my %data = (); # A hash of anonymous hashes..
2779: while (my ($key,$value) = each(%$hashref)) {
2780: my ($v,$symb,$param) = split(/:/,$key);
2781: next if ($v eq 'version' || $symb eq 'keys');
2782: next if (exists($data{$symb}) &&
2783: exists($data{$symb}->{$param}) &&
2784: $data{$symb}->{'v.'.$param} > $v);
2785: $data{$symb}->{$param}=$value;
2786: $data{$symb}->{'v.'.$param}=$v;
2787: }
1.311 albertel 2788: if (&untie_user_hash($hashref)) {
1.231 foxr 2789: while (my ($symb,$param_hash) = each(%data)) {
2790: while(my ($param,$value) = each (%$param_hash)){
2791: next if ($param =~ /^v\./); # Ignore versions...
2792: #
2793: # Just dump the symb=value pairs separated by &
2794: #
2795: $qresult.=$symb.':'.$param.'='.$value.'&';
2796: }
2797: }
2798: chop($qresult);
1.387 albertel 2799: &Reply($client , \$qresult, $userinput);
1.231 foxr 2800: } else {
2801: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2802: "while attempting currentdump\n", $userinput);
2803: }
2804: } else {
2805: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2806: "while attempting currentdump\n", $userinput);
2807: }
2808:
2809: return 1;
2810: }
2811: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2812:
2813: #
2814: # Dump a profile database with an optional regular expression
2815: # to match against the keys. In this dump, no effort is made
2816: # to separate symb from version information. Presumably the
2817: # databases that are dumped by this command are of a different
2818: # structure. Need to look at this and improve the documentation of
2819: # both this and the currentdump handler.
2820: # Parameters:
2821: # $cmd - The command keyword.
2822: # $tail - All of the characters after the $cmd:
2823: # These are expected to be a colon
2824: # separated list containing:
2825: # domain/user - identifying the user.
2826: # namespace - identifying the database.
2827: # regexp - optional regular expression
2828: # that is matched against
2829: # database keywords to do
2830: # selective dumps.
2831: # $client - Channel open on the client.
2832: # Returns:
2833: # 1 - Continue processing.
2834: # Side effects:
2835: # response is written to $client.
2836: #
2837: sub dump_with_regexp {
2838: my ($cmd, $tail, $client) = @_;
2839:
2840:
2841: my $userinput = "$cmd:$tail";
2842:
1.306 albertel 2843: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 2844: if (defined($regexp)) {
2845: $regexp=&unescape($regexp);
2846: } else {
2847: $regexp='.';
2848: }
1.306 albertel 2849: my ($start,$end);
2850: if (defined($range)) {
2851: if ($range =~/^(\d+)\-(\d+)$/) {
2852: ($start,$end) = ($1,$2);
2853: } elsif ($range =~/^(\d+)$/) {
2854: ($start,$end) = (0,$1);
2855: } else {
2856: undef($range);
2857: }
2858: }
1.231 foxr 2859: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2860: &GDBM_READER());
2861: if ($hashref) {
2862: my $qresult='';
1.306 albertel 2863: my $count=0;
1.231 foxr 2864: while (my ($key,$value) = each(%$hashref)) {
2865: if ($regexp eq '.') {
1.306 albertel 2866: $count++;
2867: if (defined($range) && $count >= $end) { last; }
2868: if (defined($range) && $count < $start) { next; }
1.231 foxr 2869: $qresult.=$key.'='.$value.'&';
2870: } else {
2871: my $unescapeKey = &unescape($key);
2872: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 2873: $count++;
2874: if (defined($range) && $count >= $end) { last; }
2875: if (defined($range) && $count < $start) { next; }
1.231 foxr 2876: $qresult.="$key=$value&";
2877: }
2878: }
2879: }
1.311 albertel 2880: if (&untie_user_hash($hashref)) {
1.231 foxr 2881: chop($qresult);
1.387 albertel 2882: &Reply($client, \$qresult, $userinput);
1.231 foxr 2883: } else {
2884: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2885: "while attempting dump\n", $userinput);
2886: }
2887: } else {
2888: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2889: "while attempting dump\n", $userinput);
2890: }
2891:
2892: return 1;
2893: }
2894: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2895:
2896: # Store a set of key=value pairs associated with a versioned name.
2897: #
2898: # Parameters:
2899: # $cmd - Request command keyword.
2900: # $tail - Tail of the request. This is a colon
2901: # separated list containing:
2902: # domain/user - User and authentication domain.
2903: # namespace - Name of the database being modified
2904: # rid - Resource keyword to modify.
2905: # what - new value associated with rid.
2906: #
2907: # $client - Socket open on the client.
2908: #
2909: #
2910: # Returns:
2911: # 1 (keep on processing).
2912: # Side-Effects:
2913: # Writes to the client
2914: sub store_handler {
2915: my ($cmd, $tail, $client) = @_;
2916:
2917: my $userinput = "$cmd:$tail";
2918:
2919: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2920: if ($namespace ne 'roles') {
2921:
2922: chomp($what);
2923: my @pairs=split(/\&/,$what);
2924: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 2925: &GDBM_WRCREAT(), "S",
1.231 foxr 2926: "$rid:$what");
2927: if ($hashref) {
2928: my $now = time;
2929: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2930: my $key;
2931: $hashref->{"version:$rid"}++;
2932: my $version=$hashref->{"version:$rid"};
2933: my $allkeys='';
2934: foreach my $pair (@pairs) {
2935: my ($key,$value)=split(/=/,$pair);
2936: $allkeys.=$key.':';
2937: $hashref->{"$version:$rid:$key"}=$value;
2938: }
2939: $hashref->{"$version:$rid:timestamp"}=$now;
2940: $allkeys.='timestamp';
2941: $hashref->{"$version:keys:$rid"}=$allkeys;
1.311 albertel 2942: if (&untie_user_hash($hashref)) {
1.231 foxr 2943: &Reply($client, "ok\n", $userinput);
2944: } else {
2945: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2946: "while attempting store\n", $userinput);
2947: }
2948: } else {
2949: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2950: "while attempting store\n", $userinput);
2951: }
2952: } else {
2953: &Failure($client, "refused\n", $userinput);
2954: }
2955:
2956: return 1;
2957: }
2958: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 2959:
1.323 albertel 2960: # Modify a set of key=value pairs associated with a versioned name.
2961: #
2962: # Parameters:
2963: # $cmd - Request command keyword.
2964: # $tail - Tail of the request. This is a colon
2965: # separated list containing:
2966: # domain/user - User and authentication domain.
2967: # namespace - Name of the database being modified
2968: # rid - Resource keyword to modify.
2969: # v - Version item to modify
2970: # what - new value associated with rid.
2971: #
2972: # $client - Socket open on the client.
2973: #
2974: #
2975: # Returns:
2976: # 1 (keep on processing).
2977: # Side-Effects:
2978: # Writes to the client
2979: sub putstore_handler {
2980: my ($cmd, $tail, $client) = @_;
2981:
2982: my $userinput = "$cmd:$tail";
2983:
2984: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
2985: if ($namespace ne 'roles') {
2986:
2987: chomp($what);
2988: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2989: &GDBM_WRCREAT(), "M",
2990: "$rid:$v:$what");
2991: if ($hashref) {
2992: my $now = time;
2993: my %data = &hash_extract($what);
2994: my @allkeys;
2995: while (my($key,$value) = each(%data)) {
2996: push(@allkeys,$key);
2997: $hashref->{"$v:$rid:$key"} = $value;
2998: }
2999: my $allkeys = join(':',@allkeys);
3000: $hashref->{"$v:keys:$rid"}=$allkeys;
3001:
3002: if (&untie_user_hash($hashref)) {
3003: &Reply($client, "ok\n", $userinput);
3004: } else {
3005: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3006: "while attempting store\n", $userinput);
3007: }
3008: } else {
3009: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3010: "while attempting store\n", $userinput);
3011: }
3012: } else {
3013: &Failure($client, "refused\n", $userinput);
3014: }
3015:
3016: return 1;
3017: }
3018: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3019:
3020: sub hash_extract {
3021: my ($str)=@_;
3022: my %hash;
3023: foreach my $pair (split(/\&/,$str)) {
3024: my ($key,$value)=split(/=/,$pair);
3025: $hash{$key}=$value;
3026: }
3027: return (%hash);
3028: }
3029: sub hash_to_str {
3030: my ($hash_ref)=@_;
3031: my $str;
3032: foreach my $key (keys(%$hash_ref)) {
3033: $str.=$key.'='.$hash_ref->{$key}.'&';
3034: }
3035: $str=~s/\&$//;
3036: return $str;
3037: }
3038:
1.231 foxr 3039: #
3040: # Dump out all versions of a resource that has key=value pairs associated
3041: # with it for each version. These resources are built up via the store
3042: # command.
3043: #
3044: # Parameters:
3045: # $cmd - Command keyword.
3046: # $tail - Remainder of the request which consists of:
3047: # domain/user - User and auth. domain.
3048: # namespace - name of resource database.
3049: # rid - Resource id.
3050: # $client - socket open on the client.
3051: #
3052: # Returns:
3053: # 1 indicating the caller should not yet exit.
3054: # Side-effects:
3055: # Writes a reply to the client.
3056: # The reply is a string of the following shape:
3057: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3058: # Where the 1 above represents version 1.
3059: # this continues for all pairs of keys in all versions.
3060: #
3061: #
3062: #
3063: #
3064: sub restore_handler {
3065: my ($cmd, $tail, $client) = @_;
3066:
3067: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
1.351 banghart 3068: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
1.352 albertel 3069: $namespace=~s/\//\_/g;
1.350 albertel 3070: $namespace = &LONCAPA::clean_username($namespace);
1.349 albertel 3071:
1.231 foxr 3072: chomp($rid);
3073: my $qresult='';
1.309 albertel 3074: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3075: if ($hashref) {
3076: my $version=$hashref->{"version:$rid"};
1.231 foxr 3077: $qresult.="version=$version&";
3078: my $scope;
3079: for ($scope=1;$scope<=$version;$scope++) {
1.309 albertel 3080: my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231 foxr 3081: my @keys=split(/:/,$vkeys);
3082: my $key;
3083: $qresult.="$scope:keys=$vkeys&";
3084: foreach $key (@keys) {
1.309 albertel 3085: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
1.231 foxr 3086: }
3087: }
1.311 albertel 3088: if (&untie_user_hash($hashref)) {
1.231 foxr 3089: $qresult=~s/\&$//;
1.387 albertel 3090: &Reply( $client, \$qresult, $userinput);
1.231 foxr 3091: } else {
3092: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3093: "while attempting restore\n", $userinput);
3094: }
3095: } else {
3096: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3097: "while attempting restore\n", $userinput);
3098: }
3099:
3100: return 1;
3101:
3102:
3103: }
3104: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3105:
3106: #
1.324 raeburn 3107: # Add a chat message to a synchronous discussion board.
1.234 foxr 3108: #
3109: # Parameters:
3110: # $cmd - Request keyword.
3111: # $tail - Tail of the command. A colon separated list
3112: # containing:
3113: # cdom - Domain on which the chat board lives
1.324 raeburn 3114: # cnum - Course containing the chat board.
3115: # newpost - Body of the posting.
3116: # group - Optional group, if chat board is only
3117: # accessible in a group within the course
1.234 foxr 3118: # $client - Socket open on the client.
3119: # Returns:
3120: # 1 - Indicating caller should keep on processing.
3121: #
3122: # Side-effects:
3123: # writes a reply to the client.
3124: #
3125: #
3126: sub send_chat_handler {
3127: my ($cmd, $tail, $client) = @_;
3128:
3129:
3130: my $userinput = "$cmd:$tail";
3131:
1.324 raeburn 3132: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3133: &chat_add($cdom,$cnum,$newpost,$group);
1.234 foxr 3134: &Reply($client, "ok\n", $userinput);
3135:
3136: return 1;
3137: }
3138: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3139:
1.234 foxr 3140: #
1.324 raeburn 3141: # Retrieve the set of chat messages from a discussion board.
1.234 foxr 3142: #
3143: # Parameters:
3144: # $cmd - Command keyword that initiated the request.
3145: # $tail - Remainder of the request after the command
3146: # keyword. In this case a colon separated list of
3147: # chat domain - Which discussion board.
3148: # chat id - Discussion thread(?)
3149: # domain/user - Authentication domain and username
3150: # of the requesting person.
1.324 raeburn 3151: # group - Optional course group containing
3152: # the board.
1.234 foxr 3153: # $client - Socket open on the client program.
3154: # Returns:
3155: # 1 - continue processing
3156: # Side effects:
3157: # Response is written to the client.
3158: #
3159: sub retrieve_chat_handler {
3160: my ($cmd, $tail, $client) = @_;
3161:
3162:
3163: my $userinput = "$cmd:$tail";
3164:
1.324 raeburn 3165: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
1.234 foxr 3166: my $reply='';
1.324 raeburn 3167: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
1.234 foxr 3168: $reply.=&escape($_).':';
3169: }
3170: $reply=~s/\:$//;
1.387 albertel 3171: &Reply($client, \$reply, $userinput);
1.234 foxr 3172:
3173:
3174: return 1;
3175: }
3176: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3177:
3178: #
3179: # Initiate a query of an sql database. SQL query repsonses get put in
3180: # a file for later retrieval. This prevents sql query results from
3181: # bottlenecking the system. Note that with loncnew, perhaps this is
3182: # less of an issue since multiple outstanding requests can be concurrently
3183: # serviced.
3184: #
3185: # Parameters:
3186: # $cmd - COmmand keyword that initiated the request.
3187: # $tail - Remainder of the command after the keyword.
3188: # For this function, this consists of a query and
3189: # 3 arguments that are self-documentingly labelled
3190: # in the original arg1, arg2, arg3.
3191: # $client - Socket open on the client.
3192: # Return:
3193: # 1 - Indicating processing should continue.
3194: # Side-effects:
3195: # a reply is written to $client.
3196: #
3197: sub send_query_handler {
3198: my ($cmd, $tail, $client) = @_;
3199:
3200:
3201: my $userinput = "$cmd:$tail";
3202:
3203: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3204: $query=~s/\n*$//g;
3205: &Reply($client, "". &sql_reply("$clientname\&$query".
3206: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3207: $userinput);
3208:
3209: return 1;
3210: }
3211: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3212:
3213: #
3214: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3215: # The query is submitted via a "querysend" transaction.
3216: # There it is passed on to the lonsql daemon, queued and issued to
3217: # mysql.
3218: # This transaction is invoked when the sql transaction is complete
3219: # it stores the query results in flie and indicates query completion.
3220: # presumably local software then fetches this response... I'm guessing
3221: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3222: # lonsql on completion of the query interacts with the lond of our
3223: # client to do a query reply storing two files:
3224: # - id - The results of the query.
3225: # - id.end - Indicating the transaction completed.
3226: # NOTE: id is a unique id assigned to the query and querysend time.
3227: # Parameters:
3228: # $cmd - Command keyword that initiated this request.
3229: # $tail - Remainder of the tail. In this case that's a colon
3230: # separated list containing the query Id and the
3231: # results of the query.
3232: # $client - Socket open on the client.
3233: # Return:
3234: # 1 - Indicating that we should continue processing.
3235: # Side effects:
3236: # ok written to the client.
3237: #
3238: sub reply_query_handler {
3239: my ($cmd, $tail, $client) = @_;
3240:
3241:
3242: my $userinput = "$cmd:$tail";
3243:
1.339 albertel 3244: my ($id,$reply)=split(/:/,$tail);
1.234 foxr 3245: my $store;
3246: my $execdir=$perlvar{'lonDaemons'};
3247: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3248: $reply=~s/\&/\n/g;
3249: print $store $reply;
3250: close $store;
3251: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3252: print $store2 "done\n";
3253: close $store2;
3254: &Reply($client, "ok\n", $userinput);
3255: } else {
3256: &Failure($client, "error: ".($!+0)
3257: ." IO::File->new Failed ".
3258: "while attempting queryreply\n", $userinput);
3259: }
3260:
3261:
3262: return 1;
3263: }
3264: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3265:
3266: #
3267: # Process the courseidput request. Not quite sure what this means
3268: # at the system level sense. It appears a gdbm file in the
3269: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3270: # a set of entries made in that database.
3271: #
3272: # Parameters:
3273: # $cmd - The command keyword that initiated this request.
3274: # $tail - Tail of the command. In this case consists of a colon
3275: # separated list contaning the domain to apply this to and
3276: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3277: # Each value is a colon separated list that includes:
3278: # description, institutional code and course owner.
3279: # For backward compatibility with versions included
3280: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3281: # code and/or course owner are preserved from the existing
3282: # record when writing a new record in response to 1.1 or
3283: # 1.2 implementations of lonnet::flushcourselogs().
3284: #
1.234 foxr 3285: # $client - Socket open on the client.
3286: # Returns:
3287: # 1 - indicating that processing should continue
3288: #
3289: # Side effects:
3290: # reply is written to the client.
3291: #
3292: sub put_course_id_handler {
3293: my ($cmd, $tail, $client) = @_;
3294:
3295:
3296: my $userinput = "$cmd:$tail";
3297:
1.266 raeburn 3298: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3299: chomp($what);
3300: my $now=time;
3301: my @pairs=split(/\&/,$what);
3302:
3303: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3304: if ($hashref) {
3305: foreach my $pair (@pairs) {
1.271 raeburn 3306: my ($key,$courseinfo) = split(/=/,$pair,2);
3307: $courseinfo =~ s/=/:/g;
1.384 raeburn 3308: if (defined($hashref->{$key})) {
3309: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3310: if (ref($value) eq 'HASH') {
3311: my @items = ('description','inst_code','owner','type');
3312: my @new_items = split(/:/,$courseinfo,-1);
3313: my %storehash;
3314: for (my $i=0; $i<@new_items; $i++) {
1.391 raeburn 3315: $storehash{$items[$i]} = &unescape($new_items[$i]);
1.384 raeburn 3316: }
3317: $hashref->{$key} =
3318: &Apache::lonnet::freeze_escape(\%storehash);
3319: my $unesc_key = &unescape($key);
3320: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3321: next;
1.383 raeburn 3322: }
1.384 raeburn 3323: }
3324: my @current_items = split(/:/,$hashref->{$key},-1);
3325: shift(@current_items); # remove description
3326: pop(@current_items); # remove last access
3327: my $numcurrent = scalar(@current_items);
3328: if ($numcurrent > 3) {
3329: $numcurrent = 3;
3330: }
3331: my @new_items = split(/:/,$courseinfo,-1);
3332: my $numnew = scalar(@new_items);
3333: if ($numcurrent > 0) {
3334: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3335: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3336: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
1.333 raeburn 3337: }
1.272 raeburn 3338: }
3339: }
1.384 raeburn 3340: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3341: }
1.311 albertel 3342: if (&untie_domain_hash($hashref)) {
1.253 foxr 3343: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3344: } else {
1.253 foxr 3345: &Failure($client, "error: ".($!+0)
1.234 foxr 3346: ." untie(GDBM) Failed ".
3347: "while attempting courseidput\n", $userinput);
3348: }
3349: } else {
1.253 foxr 3350: &Failure($client, "error: ".($!+0)
1.234 foxr 3351: ." tie(GDBM) Failed ".
3352: "while attempting courseidput\n", $userinput);
3353: }
3354:
3355: return 1;
3356: }
3357: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3358:
1.383 raeburn 3359: sub put_course_id_hash_handler {
3360: my ($cmd, $tail, $client) = @_;
3361: my $userinput = "$cmd:$tail";
1.384 raeburn 3362: my ($udom,$mode,$what) = split(/:/, $tail,3);
1.383 raeburn 3363: chomp($what);
3364: my $now=time;
3365: my @pairs=split(/\&/,$what);
1.384 raeburn 3366: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
1.383 raeburn 3367: if ($hashref) {
3368: foreach my $pair (@pairs) {
3369: my ($key,$value)=split(/=/,$pair);
1.384 raeburn 3370: my $unesc_key = &unescape($key);
3371: if ($mode ne 'timeonly') {
3372: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3373: my $curritems = &Apache::lonnet::thaw_unescape($key);
3374: if (ref($curritems) ne 'HASH') {
3375: my @current_items = split(/:/,$hashref->{$key},-1);
3376: my $lasttime = pop(@current_items);
3377: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3378: } else {
3379: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3380: }
3381: }
3382: $hashref->{$key} = $value;
3383: }
3384: if ($mode ne 'notime') {
3385: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3386: }
1.383 raeburn 3387: }
3388: if (&untie_domain_hash($hashref)) {
3389: &Reply($client, "ok\n", $userinput);
3390: } else {
3391: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3392: "while attempting courseidputhash\n", $userinput);
3393: }
3394: } else {
3395: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3396: "while attempting courseidputhash\n", $userinput);
3397: }
3398: return 1;
3399: }
3400: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3401:
1.234 foxr 3402: # Retrieves the value of a course id resource keyword pattern
3403: # defined since a starting date. Both the starting date and the
3404: # keyword pattern are optional. If the starting date is not supplied it
3405: # is treated as the beginning of time. If the pattern is not found,
3406: # it is treatred as "." matching everything.
3407: #
3408: # Parameters:
3409: # $cmd - Command keyword that resulted in us being dispatched.
3410: # $tail - The remainder of the command that, in this case, consists
3411: # of a colon separated list of:
3412: # domain - The domain in which the course database is
3413: # defined.
3414: # since - Optional parameter describing the minimum
3415: # time of definition(?) of the resources that
3416: # will match the dump.
3417: # description - regular expression that is used to filter
3418: # the dump. Only keywords matching this regexp
3419: # will be used.
1.272 raeburn 3420: # institutional code - optional supplied code to filter
3421: # the dump. Only courses with an institutional code
3422: # that match the supplied code will be returned.
1.336 raeburn 3423: # owner - optional supplied username and domain of owner to
3424: # filter the dump. Only courses for which the course
3425: # owner matches the supplied username and/or domain
3426: # will be returned. Pre-2.2.0 legacy entries from
3427: # nohist_courseiddump will only contain usernames.
1.384 raeburn 3428: # type - optional parameter for selection
3429: # regexp_ok - if true, allow the supplied institutional code
3430: # filter to behave as a regular expression.
3431: # rtn_as_hash - whether to return the information available for
3432: # each matched item as a frozen hash of all
3433: # key, value pairs in the item's hash, or as a
3434: # colon-separated list of (in order) description,
3435: # institutional code, and course owner.
3436: #
1.234 foxr 3437: # $client - The socket open on the client.
3438: # Returns:
3439: # 1 - Continue processing.
3440: # Side Effects:
3441: # a reply is written to $client.
3442: sub dump_course_id_handler {
3443: my ($cmd, $tail, $client) = @_;
3444: my $userinput = "$cmd:$tail";
3445:
1.333 raeburn 3446: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
1.384 raeburn 3447: $typefilter,$regexp_ok,$rtn_as_hash) =split(/:/,$tail);
1.234 foxr 3448: if (defined($description)) {
3449: $description=&unescape($description);
3450: } else {
3451: $description='.';
3452: }
1.266 raeburn 3453: if (defined($instcodefilter)) {
3454: $instcodefilter=&unescape($instcodefilter);
3455: } else {
3456: $instcodefilter='.';
3457: }
1.336 raeburn 3458: my ($ownerunamefilter,$ownerdomfilter);
1.266 raeburn 3459: if (defined($ownerfilter)) {
3460: $ownerfilter=&unescape($ownerfilter);
1.336 raeburn 3461: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3462: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3463: $ownerunamefilter = $1;
3464: $ownerdomfilter = $2;
3465: } else {
3466: $ownerunamefilter = $ownerfilter;
3467: $ownerdomfilter = '';
3468: }
3469: }
1.266 raeburn 3470: } else {
3471: $ownerfilter='.';
3472: }
1.336 raeburn 3473:
1.282 raeburn 3474: if (defined($coursefilter)) {
3475: $coursefilter=&unescape($coursefilter);
3476: } else {
3477: $coursefilter='.';
3478: }
1.333 raeburn 3479: if (defined($typefilter)) {
3480: $typefilter=&unescape($typefilter);
3481: } else {
3482: $typefilter='.';
3483: }
1.344 raeburn 3484: if (defined($regexp_ok)) {
3485: $regexp_ok=&unescape($regexp_ok);
3486: }
1.384 raeburn 3487: my $unpack = 1;
3488: if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&
3489: $typefilter eq '.') {
3490: $unpack = 0;
3491: }
3492: if (!defined($since)) { $since=0; }
1.234 foxr 3493: my $qresult='';
3494: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3495: if ($hashref) {
1.384 raeburn 3496: while (my ($key,$value) = each(%$hashref)) {
3497: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,%unesc_val);
3498: $unesc_key = &unescape($key);
3499: if ($unesc_key =~ /^lasttime:/) {
3500: next;
3501: } else {
3502: $lasttime_key = &escape('lasttime:'.$unesc_key);
3503: }
3504: if ($hashref->{$lasttime_key} ne '') {
3505: $lasttime = $hashref->{$lasttime_key};
3506: next if ($lasttime<$since);
3507: }
3508: my $items = &Apache::lonnet::thaw_unescape($value);
3509: if (ref($items) eq 'HASH') {
3510: $is_hash = 1;
3511: if ($unpack || !$rtn_as_hash) {
3512: $unesc_val{'descr'} = $items->{'description'};
3513: $unesc_val{'inst_code'} = $items->{'inst_code'};
3514: $unesc_val{'owner'} = $items->{'owner'};
3515: $unesc_val{'type'} = $items->{'type'};
3516: }
1.383 raeburn 3517: } else {
1.384 raeburn 3518: $is_hash = 0;
1.388 raeburn 3519: my @courseitems = split(/:/,$value);
1.383 raeburn 3520: $lasttime = pop(@courseitems);
1.394.2.1! raeburn 3521: if ($hashref->{$lasttime_key} eq '') {
! 3522: next if ($lasttime<$since);
! 3523: }
1.384 raeburn 3524: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
1.383 raeburn 3525: }
1.266 raeburn 3526: my $match = 1;
1.384 raeburn 3527: if ($description ne '.') {
3528: if (!$is_hash) {
3529: $unesc_val{'descr'} = &unescape($val{'descr'});
3530: }
3531: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
1.266 raeburn 3532: $match = 0;
1.384 raeburn 3533: }
1.266 raeburn 3534: }
1.384 raeburn 3535: if ($instcodefilter ne '.') {
3536: if (!$is_hash) {
3537: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
3538: }
1.344 raeburn 3539: if ($regexp_ok) {
1.384 raeburn 3540: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
1.344 raeburn 3541: $match = 0;
3542: }
3543: } else {
1.384 raeburn 3544: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
1.344 raeburn 3545: $match = 0;
3546: }
1.266 raeburn 3547: }
1.234 foxr 3548: }
1.384 raeburn 3549: if ($ownerfilter ne '.') {
3550: if (!$is_hash) {
3551: $unesc_val{'owner'} = &unescape($val{'owner'});
3552: }
1.336 raeburn 3553: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
1.384 raeburn 3554: if ($unesc_val{'owner'} =~ /:/) {
3555: if (eval{$unesc_val{'owner'} !~
3556: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
1.336 raeburn 3557: $match = 0;
3558: }
3559: } else {
1.384 raeburn 3560: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336 raeburn 3561: $match = 0;
3562: }
3563: }
3564: } elsif ($ownerunamefilter ne '') {
1.384 raeburn 3565: if ($unesc_val{'owner'} =~ /:/) {
3566: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
1.336 raeburn 3567: $match = 0;
3568: }
3569: } else {
1.384 raeburn 3570: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336 raeburn 3571: $match = 0;
3572: }
3573: }
3574: } elsif ($ownerdomfilter ne '') {
1.384 raeburn 3575: if ($unesc_val{'owner'} =~ /:/) {
3576: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
1.336 raeburn 3577: $match = 0;
3578: }
3579: } else {
3580: if ($ownerdomfilter ne $udom) {
3581: $match = 0;
3582: }
3583: }
1.266 raeburn 3584: }
3585: }
1.384 raeburn 3586: if ($coursefilter ne '.') {
3587: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
1.282 raeburn 3588: $match = 0;
3589: }
3590: }
1.384 raeburn 3591: if ($typefilter ne '.') {
3592: if (!$is_hash) {
3593: $unesc_val{'type'} = &unescape($val{'type'});
3594: }
3595: if ($unesc_val{'type'} eq '') {
1.333 raeburn 3596: if ($typefilter ne 'Course') {
3597: $match = 0;
3598: }
1.383 raeburn 3599: } else {
1.384 raeburn 3600: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
1.333 raeburn 3601: $match = 0;
3602: }
3603: }
3604: }
1.266 raeburn 3605: if ($match == 1) {
1.384 raeburn 3606: if ($rtn_as_hash) {
3607: if ($is_hash) {
3608: $qresult.=$key.'='.$value.'&';
3609: } else {
1.388 raeburn 3610: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
3611: 'inst_code' => &unescape($val{'inst_code'}),
3612: 'owner' => &unescape($val{'owner'}),
3613: 'type' => &unescape($val{'type'}),
1.384 raeburn 3614: );
3615: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
3616: $qresult.=$key.'='.$items.'&';
3617: }
1.383 raeburn 3618: } else {
1.384 raeburn 3619: if ($is_hash) {
3620: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
3621: &escape($unesc_val{'inst_code'}).':'.
3622: &escape($unesc_val{'owner'}).'&';
3623: } else {
3624: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
3625: ':'.$val{'owner'}.'&';
3626: }
1.383 raeburn 3627: }
1.266 raeburn 3628: }
1.234 foxr 3629: }
1.311 albertel 3630: if (&untie_domain_hash($hashref)) {
1.234 foxr 3631: chop($qresult);
1.387 albertel 3632: &Reply($client, \$qresult, $userinput);
1.234 foxr 3633: } else {
3634: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3635: "while attempting courseiddump\n", $userinput);
3636: }
3637: } else {
3638: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3639: "while attempting courseiddump\n", $userinput);
3640: }
3641: return 1;
3642: }
3643: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3644:
3645: #
1.348 raeburn 3646: # Puts an unencrypted entry in a namespace db file at the domain level
3647: #
3648: # Parameters:
3649: # $cmd - The command that got us here.
3650: # $tail - Tail of the command (remaining parameters).
3651: # $client - File descriptor connected to client.
3652: # Returns
3653: # 0 - Requested to exit, caller should shut down.
3654: # 1 - Continue processing.
3655: # Side effects:
3656: # reply is written to $client.
3657: #
3658: sub put_domain_handler {
3659: my ($cmd,$tail,$client) = @_;
3660:
3661: my $userinput = "$cmd:$tail";
3662:
3663: my ($udom,$namespace,$what) =split(/:/,$tail,3);
3664: chomp($what);
3665: my @pairs=split(/\&/,$what);
3666: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
3667: "P", $what);
3668: if ($hashref) {
3669: foreach my $pair (@pairs) {
3670: my ($key,$value)=split(/=/,$pair);
3671: $hashref->{$key}=$value;
3672: }
3673: if (&untie_domain_hash($hashref)) {
3674: &Reply($client, "ok\n", $userinput);
3675: } else {
3676: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3677: "while attempting putdom\n", $userinput);
3678: }
3679: } else {
3680: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3681: "while attempting putdom\n", $userinput);
3682: }
3683:
3684: return 1;
3685: }
3686: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
3687:
3688: # Unencrypted get from the namespace database file at the domain level.
3689: # This function retrieves a keyed item from a specific named database in the
3690: # domain directory.
3691: #
3692: # Parameters:
3693: # $cmd - Command request keyword (get).
3694: # $tail - Tail of the command. This is a colon separated list
3695: # consisting of the domain and the 'namespace'
3696: # which selects the gdbm file to do the lookup in,
3697: # & separated list of keys to lookup. Note that
3698: # the values are returned as an & separated list too.
3699: # $client - File descriptor open on the client.
3700: # Returns:
3701: # 1 - Continue processing.
3702: # 0 - Exit.
3703: # Side effects:
3704: # reply is written to $client.
3705: #
3706:
3707: sub get_domain_handler {
3708: my ($cmd, $tail, $client) = @_;
3709:
3710: my $userinput = "$client:$tail";
3711:
3712: my ($udom,$namespace,$what)=split(/:/,$tail,3);
3713: chomp($what);
3714: my @queries=split(/\&/,$what);
3715: my $qresult='';
3716: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
3717: if ($hashref) {
3718: for (my $i=0;$i<=$#queries;$i++) {
3719: $qresult.="$hashref->{$queries[$i]}&";
3720: }
3721: if (&untie_domain_hash($hashref)) {
3722: $qresult=~s/\&$//;
1.387 albertel 3723: &Reply($client, \$qresult, $userinput);
1.348 raeburn 3724: } else {
3725: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3726: "while attempting getdom\n",$userinput);
3727: }
3728: } else {
3729: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3730: "while attempting getdom\n",$userinput);
3731: }
3732:
3733: return 1;
3734: }
1.360 raeburn 3735: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
1.348 raeburn 3736:
3737:
3738: #
1.238 foxr 3739: # Puts an id to a domains id database.
3740: #
3741: # Parameters:
3742: # $cmd - The command that triggered us.
3743: # $tail - Remainder of the request other than the command. This is a
3744: # colon separated list containing:
3745: # $domain - The domain for which we are writing the id.
3746: # $pairs - The id info to write... this is and & separated list
3747: # of keyword=value.
3748: # $client - Socket open on the client.
3749: # Returns:
3750: # 1 - Continue processing.
3751: # Side effects:
3752: # reply is written to $client.
3753: #
3754: sub put_id_handler {
3755: my ($cmd,$tail,$client) = @_;
3756:
3757:
3758: my $userinput = "$cmd:$tail";
3759:
3760: my ($udom,$what)=split(/:/,$tail);
3761: chomp($what);
3762: my @pairs=split(/\&/,$what);
3763: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3764: "P", $what);
3765: if ($hashref) {
3766: foreach my $pair (@pairs) {
3767: my ($key,$value)=split(/=/,$pair);
3768: $hashref->{$key}=$value;
3769: }
1.311 albertel 3770: if (&untie_domain_hash($hashref)) {
1.238 foxr 3771: &Reply($client, "ok\n", $userinput);
3772: } else {
3773: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3774: "while attempting idput\n", $userinput);
3775: }
3776: } else {
3777: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3778: "while attempting idput\n", $userinput);
3779: }
3780:
3781: return 1;
3782: }
1.263 albertel 3783: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3784:
3785: #
3786: # Retrieves a set of id values from the id database.
3787: # Returns an & separated list of results, one for each requested id to the
3788: # client.
3789: #
3790: # Parameters:
3791: # $cmd - Command keyword that caused us to be dispatched.
3792: # $tail - Tail of the command. Consists of a colon separated:
3793: # domain - the domain whose id table we dump
3794: # ids Consists of an & separated list of
3795: # id keywords whose values will be fetched.
3796: # nonexisting keywords will have an empty value.
3797: # $client - Socket open on the client.
3798: #
3799: # Returns:
3800: # 1 - indicating processing should continue.
3801: # Side effects:
3802: # An & separated list of results is written to $client.
3803: #
3804: sub get_id_handler {
3805: my ($cmd, $tail, $client) = @_;
3806:
3807:
3808: my $userinput = "$client:$tail";
3809:
3810: my ($udom,$what)=split(/:/,$tail);
3811: chomp($what);
3812: my @queries=split(/\&/,$what);
3813: my $qresult='';
3814: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3815: if ($hashref) {
3816: for (my $i=0;$i<=$#queries;$i++) {
3817: $qresult.="$hashref->{$queries[$i]}&";
3818: }
1.311 albertel 3819: if (&untie_domain_hash($hashref)) {
1.238 foxr 3820: $qresult=~s/\&$//;
1.387 albertel 3821: &Reply($client, \$qresult, $userinput);
1.238 foxr 3822: } else {
3823: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3824: "while attempting idget\n",$userinput);
3825: }
3826: } else {
3827: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3828: "while attempting idget\n",$userinput);
3829: }
3830:
3831: return 1;
3832: }
1.263 albertel 3833: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3834:
3835: #
1.299 raeburn 3836: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
3837: #
3838: # Parameters
3839: # $cmd - Command keyword that caused us to be dispatched.
3840: # $tail - Tail of the command. Consists of a colon separated:
3841: # domain - the domain whose dcmail we are recording
3842: # email Consists of key=value pair
3843: # where key is unique msgid
3844: # and value is message (in XML)
3845: # $client - Socket open on the client.
3846: #
3847: # Returns:
3848: # 1 - indicating processing should continue.
3849: # Side effects
3850: # reply is written to $client.
3851: #
3852: sub put_dcmail_handler {
3853: my ($cmd,$tail,$client) = @_;
3854: my $userinput = "$cmd:$tail";
3855:
3856: my ($udom,$what)=split(/:/,$tail);
3857: chomp($what);
3858: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3859: if ($hashref) {
3860: my ($key,$value)=split(/=/,$what);
3861: $hashref->{$key}=$value;
3862: }
1.311 albertel 3863: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3864: &Reply($client, "ok\n", $userinput);
3865: } else {
3866: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3867: "while attempting dcmailput\n", $userinput);
3868: }
3869: return 1;
3870: }
3871: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3872:
3873: #
3874: # Retrieves broadcast e-mail from nohist_dcmail database
3875: # Returns to client an & separated list of key=value pairs,
3876: # where key is msgid and value is message information.
3877: #
3878: # Parameters
3879: # $cmd - Command keyword that caused us to be dispatched.
3880: # $tail - Tail of the command. Consists of a colon separated:
3881: # domain - the domain whose dcmail table we dump
3882: # startfilter - beginning of time window
3883: # endfilter - end of time window
3884: # sendersfilter - & separated list of username:domain
3885: # for senders to search for.
3886: # $client - Socket open on the client.
3887: #
3888: # Returns:
3889: # 1 - indicating processing should continue.
3890: # Side effects
3891: # reply (& separated list of msgid=messageinfo pairs) is
3892: # written to $client.
3893: #
3894: sub dump_dcmail_handler {
3895: my ($cmd, $tail, $client) = @_;
3896:
3897: my $userinput = "$cmd:$tail";
3898: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3899: chomp($sendersfilter);
3900: my @senders = ();
3901: if (defined($startfilter)) {
3902: $startfilter=&unescape($startfilter);
3903: } else {
3904: $startfilter='.';
3905: }
3906: if (defined($endfilter)) {
3907: $endfilter=&unescape($endfilter);
3908: } else {
3909: $endfilter='.';
3910: }
3911: if (defined($sendersfilter)) {
3912: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 3913: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 3914: }
3915:
3916: my $qresult='';
3917: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3918: if ($hashref) {
3919: while (my ($key,$value) = each(%$hashref)) {
3920: my $match = 1;
1.303 albertel 3921: my ($timestamp,$subj,$uname,$udom) =
3922: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 3923: $subj = &unescape($subj);
3924: unless ($startfilter eq '.' || !defined($startfilter)) {
3925: if ($timestamp < $startfilter) {
3926: $match = 0;
3927: }
3928: }
3929: unless ($endfilter eq '.' || !defined($endfilter)) {
3930: if ($timestamp > $endfilter) {
3931: $match = 0;
3932: }
3933: }
3934: unless (@senders < 1) {
3935: unless (grep/^$uname:$udom$/,@senders) {
3936: $match = 0;
3937: }
3938: }
3939: if ($match == 1) {
3940: $qresult.=$key.'='.$value.'&';
3941: }
3942: }
1.311 albertel 3943: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3944: chop($qresult);
1.387 albertel 3945: &Reply($client, \$qresult, $userinput);
1.299 raeburn 3946: } else {
3947: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3948: "while attempting dcmaildump\n", $userinput);
3949: }
3950: } else {
3951: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3952: "while attempting dcmaildump\n", $userinput);
3953: }
3954: return 1;
3955: }
3956:
3957: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3958:
3959: #
3960: # Puts domain roles in nohist_domainroles database
3961: #
3962: # Parameters
3963: # $cmd - Command keyword that caused us to be dispatched.
3964: # $tail - Tail of the command. Consists of a colon separated:
3965: # domain - the domain whose roles we are recording
3966: # role - Consists of key=value pair
3967: # where key is unique role
3968: # and value is start/end date information
3969: # $client - Socket open on the client.
3970: #
3971: # Returns:
3972: # 1 - indicating processing should continue.
3973: # Side effects
3974: # reply is written to $client.
3975: #
3976:
3977: sub put_domainroles_handler {
3978: my ($cmd,$tail,$client) = @_;
3979:
3980: my $userinput = "$cmd:$tail";
3981: my ($udom,$what)=split(/:/,$tail);
3982: chomp($what);
3983: my @pairs=split(/\&/,$what);
3984: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3985: if ($hashref) {
3986: foreach my $pair (@pairs) {
3987: my ($key,$value)=split(/=/,$pair);
3988: $hashref->{$key}=$value;
3989: }
1.311 albertel 3990: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3991: &Reply($client, "ok\n", $userinput);
3992: } else {
3993: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3994: "while attempting domroleput\n", $userinput);
3995: }
3996: } else {
3997: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3998: "while attempting domroleput\n", $userinput);
3999: }
4000:
4001: return 1;
4002: }
4003:
4004: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4005:
4006: #
4007: # Retrieves domain roles from nohist_domainroles database
4008: # Returns to client an & separated list of key=value pairs,
4009: # where key is role and value is start and end date information.
4010: #
4011: # Parameters
4012: # $cmd - Command keyword that caused us to be dispatched.
4013: # $tail - Tail of the command. Consists of a colon separated:
4014: # domain - the domain whose domain roles table we dump
4015: # $client - Socket open on the client.
4016: #
4017: # Returns:
4018: # 1 - indicating processing should continue.
4019: # Side effects
4020: # reply (& separated list of role=start/end info pairs) is
4021: # written to $client.
4022: #
4023: sub dump_domainroles_handler {
4024: my ($cmd, $tail, $client) = @_;
4025:
4026: my $userinput = "$cmd:$tail";
4027: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4028: chomp($rolesfilter);
4029: my @roles = ();
4030: if (defined($startfilter)) {
4031: $startfilter=&unescape($startfilter);
4032: } else {
4033: $startfilter='.';
4034: }
4035: if (defined($endfilter)) {
4036: $endfilter=&unescape($endfilter);
4037: } else {
4038: $endfilter='.';
4039: }
4040: if (defined($rolesfilter)) {
4041: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 4042: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 4043: }
4044:
4045: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4046: if ($hashref) {
4047: my $qresult = '';
4048: while (my ($key,$value) = each(%$hashref)) {
4049: my $match = 1;
4050: my ($start,$end) = split(/:/,&unescape($value));
4051: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
4052: unless ($startfilter eq '.' || !defined($startfilter)) {
4053: if ($start >= $startfilter) {
4054: $match = 0;
4055: }
4056: }
4057: unless ($endfilter eq '.' || !defined($endfilter)) {
4058: if ($end <= $endfilter) {
4059: $match = 0;
4060: }
4061: }
4062: unless (@roles < 1) {
1.389 raeburn 4063: unless (grep/^\Q$trole\E$/,@roles) {
1.299 raeburn 4064: $match = 0;
4065: }
4066: }
4067: if ($match == 1) {
4068: $qresult.=$key.'='.$value.'&';
4069: }
4070: }
1.311 albertel 4071: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4072: chop($qresult);
1.387 albertel 4073: &Reply($client, \$qresult, $userinput);
1.299 raeburn 4074: } else {
4075: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4076: "while attempting domrolesdump\n", $userinput);
4077: }
4078: } else {
4079: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4080: "while attempting domrolesdump\n", $userinput);
4081: }
4082: return 1;
4083: }
4084:
4085: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4086:
4087:
1.238 foxr 4088: # Process the tmpput command I'm not sure what this does.. Seems to
4089: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4090: # where Id is the client's ip concatenated with a sequence number.
4091: # The file will contain some value that is passed in. Is this e.g.
4092: # a login token?
4093: #
4094: # Parameters:
4095: # $cmd - The command that got us dispatched.
4096: # $tail - The remainder of the request following $cmd:
4097: # In this case this will be the contents of the file.
4098: # $client - Socket connected to the client.
4099: # Returns:
4100: # 1 indicating processing can continue.
4101: # Side effects:
4102: # A file is created in the local filesystem.
4103: # A reply is sent to the client.
4104: sub tmp_put_handler {
4105: my ($cmd, $what, $client) = @_;
4106:
4107: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4108:
1.347 raeburn 4109: my ($record,$context) = split(/:/,$what);
4110: if ($context ne '') {
4111: chomp($context);
4112: $context = &unescape($context);
4113: }
4114: my ($id,$store);
1.238 foxr 4115: $tmpsnum++;
1.347 raeburn 4116: if ($context eq 'resetpw') {
4117: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4118: } else {
4119: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4120: }
1.238 foxr 4121: $id=~s/\W/\_/g;
1.347 raeburn 4122: $record=~s/\n//g;
1.238 foxr 4123: my $execdir=$perlvar{'lonDaemons'};
4124: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1.347 raeburn 4125: print $store $record;
1.238 foxr 4126: close $store;
1.387 albertel 4127: &Reply($client, \$id, $userinput);
1.238 foxr 4128: } else {
4129: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4130: "while attempting tmpput\n", $userinput);
4131: }
4132: return 1;
4133:
4134: }
4135: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 4136:
1.238 foxr 4137: # Processes the tmpget command. This command returns the contents
4138: # of a temporary resource file(?) created via tmpput.
4139: #
4140: # Paramters:
4141: # $cmd - Command that got us dispatched.
4142: # $id - Tail of the command, contain the id of the resource
4143: # we want to fetch.
4144: # $client - socket open on the client.
4145: # Return:
4146: # 1 - Inidcating processing can continue.
4147: # Side effects:
4148: # A reply is sent to the client.
4149: #
4150: sub tmp_get_handler {
4151: my ($cmd, $id, $client) = @_;
4152:
4153: my $userinput = "$cmd:$id";
4154:
4155:
4156: $id=~s/\W/\_/g;
4157: my $store;
4158: my $execdir=$perlvar{'lonDaemons'};
4159: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4160: my $reply=<$store>;
1.387 albertel 4161: &Reply( $client, \$reply, $userinput);
1.238 foxr 4162: close $store;
4163: } else {
4164: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4165: "while attempting tmpget\n", $userinput);
4166: }
4167:
4168: return 1;
4169: }
4170: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 4171:
1.238 foxr 4172: #
4173: # Process the tmpdel command. This command deletes a temp resource
4174: # created by the tmpput command.
4175: #
4176: # Parameters:
4177: # $cmd - Command that got us here.
4178: # $id - Id of the temporary resource created.
4179: # $client - socket open on the client process.
4180: #
4181: # Returns:
4182: # 1 - Indicating processing should continue.
4183: # Side Effects:
4184: # A file is deleted
4185: # A reply is sent to the client.
4186: sub tmp_del_handler {
4187: my ($cmd, $id, $client) = @_;
4188:
4189: my $userinput= "$cmd:$id";
4190:
4191: chomp($id);
4192: $id=~s/\W/\_/g;
4193: my $execdir=$perlvar{'lonDaemons'};
4194: if (unlink("$execdir/tmp/$id.tmp")) {
4195: &Reply($client, "ok\n", $userinput);
4196: } else {
4197: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4198: "while attempting tmpdel\n", $userinput);
4199: }
4200:
4201: return 1;
4202:
4203: }
4204: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 4205:
1.238 foxr 4206: #
1.246 foxr 4207: # Processes the setannounce command. This command
4208: # creates a file named announce.txt in the top directory of
4209: # the documentn root and sets its contents. The announce.txt file is
4210: # printed in its entirety at the LonCAPA login page. Note:
4211: # once the announcement.txt fileis created it cannot be deleted.
4212: # However, setting the contents of the file to empty removes the
4213: # announcement from the login page of loncapa so who cares.
4214: #
4215: # Parameters:
4216: # $cmd - The command that got us dispatched.
4217: # $announcement - The text of the announcement.
4218: # $client - Socket open on the client process.
4219: # Retunrns:
4220: # 1 - Indicating request processing should continue
4221: # Side Effects:
4222: # The file {DocRoot}/announcement.txt is created.
4223: # A reply is sent to $client.
4224: #
4225: sub set_announce_handler {
4226: my ($cmd, $announcement, $client) = @_;
4227:
4228: my $userinput = "$cmd:$announcement";
4229:
4230: chomp($announcement);
4231: $announcement=&unescape($announcement);
4232: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4233: '/announcement.txt')) {
4234: print $store $announcement;
4235: close $store;
4236: &Reply($client, "ok\n", $userinput);
4237: } else {
4238: &Failure($client, "error: ".($!+0)."\n", $userinput);
4239: }
4240:
4241: return 1;
4242: }
4243: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 4244:
1.246 foxr 4245: #
4246: # Return the version of the daemon. This can be used to determine
4247: # the compatibility of cross version installations or, alternatively to
4248: # simply know who's out of date and who isn't. Note that the version
4249: # is returned concatenated with the tail.
4250: # Parameters:
4251: # $cmd - the request that dispatched to us.
4252: # $tail - Tail of the request (client's version?).
4253: # $client - Socket open on the client.
4254: #Returns:
4255: # 1 - continue processing requests.
4256: # Side Effects:
4257: # Replies with version to $client.
4258: sub get_version_handler {
4259: my ($cmd, $tail, $client) = @_;
4260:
4261: my $userinput = $cmd.$tail;
4262:
4263: &Reply($client, &version($userinput)."\n", $userinput);
4264:
4265:
4266: return 1;
4267: }
4268: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 4269:
1.246 foxr 4270: # Set the current host and domain. This is used to support
4271: # multihomed systems. Each IP of the system, or even separate daemons
4272: # on the same IP can be treated as handling a separate lonCAPA virtual
4273: # machine. This command selects the virtual lonCAPA. The client always
4274: # knows the right one since it is lonc and it is selecting the domain/system
4275: # from the hosts.tab file.
4276: # Parameters:
4277: # $cmd - Command that dispatched us.
4278: # $tail - Tail of the command (domain/host requested).
4279: # $socket - Socket open on the client.
4280: #
4281: # Returns:
4282: # 1 - Indicates the program should continue to process requests.
4283: # Side-effects:
4284: # The default domain/system context is modified for this daemon.
4285: # a reply is sent to the client.
4286: #
4287: sub set_virtual_host_handler {
4288: my ($cmd, $tail, $socket) = @_;
4289:
4290: my $userinput ="$cmd:$tail";
4291:
4292: &Reply($client, &sethost($userinput)."\n", $userinput);
4293:
4294:
4295: return 1;
4296: }
1.247 albertel 4297: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 4298:
4299: # Process a request to exit:
4300: # - "bye" is sent to the client.
4301: # - The client socket is shutdown and closed.
4302: # - We indicate to the caller that we should exit.
4303: # Formal Parameters:
4304: # $cmd - The command that got us here.
4305: # $tail - Tail of the command (empty).
4306: # $client - Socket open on the tail.
4307: # Returns:
4308: # 0 - Indicating the program should exit!!
4309: #
4310: sub exit_handler {
4311: my ($cmd, $tail, $client) = @_;
4312:
4313: my $userinput = "$cmd:$tail";
4314:
4315: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4316: &Reply($client, "bye\n", $userinput);
4317: $client->shutdown(2); # shutdown the socket forcibly.
4318: $client->close();
4319:
4320: return 0;
4321: }
1.248 foxr 4322: ®ister_handler("exit", \&exit_handler, 0,1,1);
4323: ®ister_handler("init", \&exit_handler, 0,1,1);
4324: ®ister_handler("quit", \&exit_handler, 0,1,1);
4325:
4326: # Determine if auto-enrollment is enabled.
4327: # Note that the original had what I believe to be a defect.
4328: # The original returned 0 if the requestor was not a registerd client.
4329: # It should return "refused".
4330: # Formal Parameters:
4331: # $cmd - The command that invoked us.
4332: # $tail - The tail of the command (Extra command parameters.
4333: # $client - The socket open on the client that issued the request.
4334: # Returns:
4335: # 1 - Indicating processing should continue.
4336: #
4337: sub enrollment_enabled_handler {
4338: my ($cmd, $tail, $client) = @_;
4339: my $userinput = $cmd.":".$tail; # For logging purposes.
4340:
4341:
1.337 albertel 4342: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4343:
1.248 foxr 4344: my $outcome = &localenroll::run($cdom);
1.387 albertel 4345: &Reply($client, \$outcome, $userinput);
1.248 foxr 4346:
4347: return 1;
4348: }
4349: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4350:
4351: # Get the official sections for which auto-enrollment is possible.
4352: # Since the admin people won't know about 'unofficial sections'
4353: # we cannot auto-enroll on them.
4354: # Formal Parameters:
4355: # $cmd - The command request that got us dispatched here.
4356: # $tail - The remainder of the request. In our case this
4357: # will be split into:
4358: # $coursecode - The course name from the admin point of view.
4359: # $cdom - The course's domain(?).
4360: # $client - Socket open on the client.
4361: # Returns:
4362: # 1 - Indiciting processing should continue.
4363: #
4364: sub get_sections_handler {
4365: my ($cmd, $tail, $client) = @_;
4366: my $userinput = "$cmd:$tail";
4367:
4368: my ($coursecode, $cdom) = split(/:/, $tail);
4369: my @secs = &localenroll::get_sections($coursecode,$cdom);
4370: my $seclist = &escape(join(':',@secs));
4371:
1.387 albertel 4372: &Reply($client, \$seclist, $userinput);
1.248 foxr 4373:
4374:
4375: return 1;
4376: }
4377: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4378:
4379: # Validate the owner of a new course section.
4380: #
4381: # Formal Parameters:
4382: # $cmd - Command that got us dispatched.
4383: # $tail - the remainder of the command. For us this consists of a
4384: # colon separated string containing:
4385: # $inst - Course Id from the institutions point of view.
4386: # $owner - Proposed owner of the course.
4387: # $cdom - Domain of the course (from the institutions
4388: # point of view?)..
4389: # $client - Socket open on the client.
4390: #
4391: # Returns:
4392: # 1 - Processing should continue.
4393: #
4394: sub validate_course_owner_handler {
4395: my ($cmd, $tail, $client) = @_;
4396: my $userinput = "$cmd:$tail";
4397: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4398:
1.336 raeburn 4399: $owner = &unescape($owner);
1.248 foxr 4400: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
1.387 albertel 4401: &Reply($client, \$outcome, $userinput);
1.248 foxr 4402:
4403:
4404:
4405: return 1;
4406: }
4407: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 4408:
1.248 foxr 4409: #
4410: # Validate a course section in the official schedule of classes
4411: # from the institutions point of view (part of autoenrollment).
4412: #
4413: # Formal Parameters:
4414: # $cmd - The command request that got us dispatched.
4415: # $tail - The tail of the command. In this case,
4416: # this is a colon separated set of words that will be split
4417: # into:
4418: # $inst_course_id - The course/section id from the
4419: # institutions point of view.
4420: # $cdom - The domain from the institutions
4421: # point of view.
4422: # $client - Socket open on the client.
4423: # Returns:
4424: # 1 - Indicating processing should continue.
4425: #
4426: sub validate_course_section_handler {
4427: my ($cmd, $tail, $client) = @_;
4428: my $userinput = "$cmd:$tail";
4429: my ($inst_course_id, $cdom) = split(/:/, $tail);
4430:
4431: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
1.387 albertel 4432: &Reply($client, \$outcome, $userinput);
1.248 foxr 4433:
4434:
4435: return 1;
4436: }
4437: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4438:
4439: #
1.340 raeburn 4440: # Validate course owner's access to enrollment data for specific class section.
4441: #
4442: #
4443: # Formal Parameters:
4444: # $cmd - The command request that got us dispatched.
4445: # $tail - The tail of the command. In this case this is a colon separated
4446: # set of words that will be split into:
4447: # $inst_class - Institutional code for the specific class section
4448: # $courseowner - The escaped username:domain of the course owner
4449: # $cdom - The domain of the course from the institution's
4450: # point of view.
4451: # $client - The socket open on the client.
4452: # Returns:
4453: # 1 - continue processing.
4454: #
4455:
4456: sub validate_class_access_handler {
4457: my ($cmd, $tail, $client) = @_;
4458: my $userinput = "$cmd:$tail";
1.383 raeburn 4459: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
1.392 raeburn 4460: my $owners = &unescape($ownerlist);
1.341 albertel 4461: my $outcome;
4462: eval {
4463: local($SIG{__DIE__})='DEFAULT';
1.392 raeburn 4464: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
1.341 albertel 4465: };
1.387 albertel 4466: &Reply($client,\$outcome, $userinput);
1.340 raeburn 4467:
4468: return 1;
4469: }
4470: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
4471:
4472: #
4473: # Create a password for a new LON-CAPA user added by auto-enrollment.
4474: # Only used for case where authentication method for new user is localauth
1.248 foxr 4475: #
4476: # Formal Parameters:
4477: # $cmd - The command request that got us dispatched.
4478: # $tail - The tail of the command. In this case this is a colon separated
4479: # set of words that will be split into:
1.340 raeburn 4480: # $authparam - An authentication parameter (localauth parameter).
1.248 foxr 4481: # $cdom - The domain of the course from the institution's
4482: # point of view.
4483: # $client - The socket open on the client.
4484: # Returns:
4485: # 1 - continue processing.
4486: #
4487: sub create_auto_enroll_password_handler {
4488: my ($cmd, $tail, $client) = @_;
4489: my $userinput = "$cmd:$tail";
4490:
4491: my ($authparam, $cdom) = split(/:/, $userinput);
4492:
4493: my ($create_passwd,$authchk);
4494: ($authparam,
4495: $create_passwd,
4496: $authchk) = &localenroll::create_password($authparam,$cdom);
4497:
4498: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4499: $userinput);
4500:
4501:
4502: return 1;
4503: }
4504: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4505: 0, 1, 0);
4506:
4507: # Retrieve and remove temporary files created by/during autoenrollment.
4508: #
4509: # Formal Parameters:
4510: # $cmd - The command that got us dispatched.
4511: # $tail - The tail of the command. In our case this is a colon
4512: # separated list that will be split into:
4513: # $filename - The name of the file to remove.
4514: # The filename is given as a path relative to
4515: # the LonCAPA temp file directory.
4516: # $client - Socket open on the client.
4517: #
4518: # Returns:
4519: # 1 - Continue processing.
4520: sub retrieve_auto_file_handler {
4521: my ($cmd, $tail, $client) = @_;
4522: my $userinput = "cmd:$tail";
4523:
4524: my ($filename) = split(/:/, $tail);
4525:
4526: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4527: if ( (-e $source) && ($filename ne '') ) {
4528: my $reply = '';
4529: if (open(my $fh,$source)) {
4530: while (<$fh>) {
4531: chomp($_);
4532: $_ =~ s/^\s+//g;
4533: $_ =~ s/\s+$//g;
4534: $reply .= $_;
4535: }
4536: close($fh);
4537: &Reply($client, &escape($reply)."\n", $userinput);
4538:
4539: # Does this have to be uncommented??!? (RF).
4540: #
4541: # unlink($source);
4542: } else {
4543: &Failure($client, "error\n", $userinput);
4544: }
4545: } else {
4546: &Failure($client, "error\n", $userinput);
4547: }
4548:
4549:
4550: return 1;
4551: }
4552: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4553:
4554: #
4555: # Read and retrieve institutional code format (for support form).
4556: # Formal Parameters:
4557: # $cmd - Command that dispatched us.
4558: # $tail - Tail of the command. In this case it conatins
4559: # the course domain and the coursename.
4560: # $client - Socket open on the client.
4561: # Returns:
4562: # 1 - Continue processing.
4563: #
4564: sub get_institutional_code_format_handler {
4565: my ($cmd, $tail, $client) = @_;
4566: my $userinput = "$cmd:$tail";
4567:
4568: my $reply;
4569: my($cdom,$course) = split(/:/,$tail);
4570: my @pairs = split/\&/,$course;
4571: my %instcodes = ();
4572: my %codes = ();
4573: my @codetitles = ();
4574: my %cat_titles = ();
4575: my %cat_order = ();
4576: foreach (@pairs) {
4577: my ($key,$value) = split/=/,$_;
4578: $instcodes{&unescape($key)} = &unescape($value);
4579: }
4580: my $formatreply = &localenroll::instcode_format($cdom,
4581: \%instcodes,
4582: \%codes,
4583: \@codetitles,
4584: \%cat_titles,
4585: \%cat_order);
4586: if ($formatreply eq 'ok') {
1.365 albertel 4587: my $codes_str = &Apache::lonnet::hash2str(%codes);
4588: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
4589: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
4590: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
1.248 foxr 4591: &Reply($client,
4592: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4593: .$cat_order_str."\n",
4594: $userinput);
4595: } else {
4596: # this else branch added by RF since if not ok, lonc will
4597: # hang waiting on reply until timeout.
4598: #
4599: &Reply($client, "format_error\n", $userinput);
4600: }
4601:
4602: return 1;
4603: }
1.265 albertel 4604: ®ister_handler("autoinstcodeformat",
4605: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 4606:
1.345 raeburn 4607: sub get_institutional_defaults_handler {
4608: my ($cmd, $tail, $client) = @_;
4609: my $userinput = "$cmd:$tail";
4610:
4611: my $dom = $tail;
4612: my %defaults_hash;
4613: my @code_order;
4614: my $outcome;
4615: eval {
4616: local($SIG{__DIE__})='DEFAULT';
4617: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
4618: \@code_order);
4619: };
4620: if (!$@) {
4621: if ($outcome eq 'ok') {
4622: my $result='';
4623: while (my ($key,$value) = each(%defaults_hash)) {
4624: $result.=&escape($key).'='.&escape($value).'&';
4625: }
4626: $result .= 'code_order='.&escape(join('&',@code_order));
1.387 albertel 4627: &Reply($client,\$result,$userinput);
1.345 raeburn 4628: } else {
4629: &Reply($client,"error\n", $userinput);
4630: }
4631: } else {
4632: &Failure($client,"unknown_cmd\n",$userinput);
4633: }
4634: }
4635: ®ister_handler("autoinstcodedefaults",
4636: \&get_institutional_defaults_handler,0,1,0);
4637:
1.381 raeburn 4638: sub get_institutional_user_rules {
4639: my ($cmd, $tail, $client) = @_;
4640: my $userinput = "$cmd:$tail";
4641: my $dom = &unescape($tail);
4642: my (%rules_hash,@rules_order);
4643: my $outcome;
4644: eval {
4645: local($SIG{__DIE__})='DEFAULT';
4646: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
4647: };
4648: if (!$@) {
4649: if ($outcome eq 'ok') {
4650: my $result;
4651: foreach my $key (keys(%rules_hash)) {
4652: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
4653: }
4654: $result =~ s/\&$//;
4655: $result .= ':';
4656: if (@rules_order > 0) {
4657: foreach my $item (@rules_order) {
4658: $result .= &escape($item).'&';
4659: }
4660: }
4661: $result =~ s/\&$//;
1.387 albertel 4662: &Reply($client,\$result,$userinput);
1.381 raeburn 4663: } else {
4664: &Reply($client,"error\n", $userinput);
4665: }
4666: } else {
4667: &Failure($client,"unknown_cmd\n",$userinput);
4668: }
4669: }
4670: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
4671:
1.389 raeburn 4672: sub get_institutional_id_rules {
4673: my ($cmd, $tail, $client) = @_;
4674: my $userinput = "$cmd:$tail";
4675: my $dom = &unescape($tail);
4676: my (%rules_hash,@rules_order);
4677: my $outcome;
4678: eval {
4679: local($SIG{__DIE__})='DEFAULT';
4680: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
4681: };
4682: if (!$@) {
4683: if ($outcome eq 'ok') {
4684: my $result;
4685: foreach my $key (keys(%rules_hash)) {
4686: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
4687: }
4688: $result =~ s/\&$//;
4689: $result .= ':';
4690: if (@rules_order > 0) {
4691: foreach my $item (@rules_order) {
4692: $result .= &escape($item).'&';
4693: }
4694: }
4695: $result =~ s/\&$//;
4696: &Reply($client,\$result,$userinput);
4697: } else {
4698: &Reply($client,"error\n", $userinput);
4699: }
4700: } else {
4701: &Failure($client,"unknown_cmd\n",$userinput);
4702: }
4703: }
4704: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
4705:
1.381 raeburn 4706:
4707: sub institutional_username_check {
4708: my ($cmd, $tail, $client) = @_;
4709: my $userinput = "$cmd:$tail";
4710: my %rulecheck;
4711: my $outcome;
4712: my ($udom,$uname,@rules) = split(/:/,$tail);
4713: $udom = &unescape($udom);
4714: $uname = &unescape($uname);
4715: @rules = map {&unescape($_);} (@rules);
4716: eval {
4717: local($SIG{__DIE__})='DEFAULT';
4718: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
4719: };
4720: if (!$@) {
4721: if ($outcome eq 'ok') {
4722: my $result='';
4723: foreach my $key (keys(%rulecheck)) {
4724: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
4725: }
1.387 albertel 4726: &Reply($client,\$result,$userinput);
1.381 raeburn 4727: } else {
4728: &Reply($client,"error\n", $userinput);
4729: }
4730: } else {
4731: &Failure($client,"unknown_cmd\n",$userinput);
4732: }
4733: }
4734: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
4735:
1.389 raeburn 4736: sub institutional_id_check {
4737: my ($cmd, $tail, $client) = @_;
4738: my $userinput = "$cmd:$tail";
4739: my %rulecheck;
4740: my $outcome;
4741: my ($udom,$id,@rules) = split(/:/,$tail);
4742: $udom = &unescape($udom);
4743: $id = &unescape($id);
4744: @rules = map {&unescape($_);} (@rules);
4745: eval {
4746: local($SIG{__DIE__})='DEFAULT';
4747: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
4748: };
4749: if (!$@) {
4750: if ($outcome eq 'ok') {
4751: my $result='';
4752: foreach my $key (keys(%rulecheck)) {
4753: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
4754: }
4755: &Reply($client,\$result,$userinput);
4756: } else {
4757: &Reply($client,"error\n", $userinput);
4758: }
4759: } else {
4760: &Failure($client,"unknown_cmd\n",$userinput);
4761: }
4762: }
4763: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
1.345 raeburn 4764:
1.317 raeburn 4765: # Get domain specific conditions for import of student photographs to a course
4766: #
4767: # Retrieves information from photo_permission subroutine in localenroll.
4768: # Returns outcome (ok) if no processing errors, and whether course owner is
4769: # required to accept conditions of use (yes/no).
4770: #
4771: #
4772: sub photo_permission_handler {
4773: my ($cmd, $tail, $client) = @_;
4774: my $userinput = "$cmd:$tail";
4775: my $cdom = $tail;
4776: my ($perm_reqd,$conditions);
1.320 albertel 4777: my $outcome;
4778: eval {
4779: local($SIG{__DIE__})='DEFAULT';
4780: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
4781: \$conditions);
4782: };
4783: if (!$@) {
4784: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
4785: $userinput);
4786: } else {
4787: &Failure($client,"unknown_cmd\n",$userinput);
4788: }
4789: return 1;
1.317 raeburn 4790: }
4791: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
4792:
4793: #
4794: # Checks if student photo is available for a user in the domain, in the user's
4795: # directory (in /userfiles/internal/studentphoto.jpg).
4796: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
4797: # the student's photo.
4798:
4799: sub photo_check_handler {
4800: my ($cmd, $tail, $client) = @_;
4801: my $userinput = "$cmd:$tail";
4802: my ($udom,$uname,$pid) = split(/:/,$tail);
4803: $udom = &unescape($udom);
4804: $uname = &unescape($uname);
4805: $pid = &unescape($pid);
4806: my $path=&propath($udom,$uname).'/userfiles/internal/';
4807: if (!-e $path) {
4808: &mkpath($path);
4809: }
4810: my $response;
4811: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
4812: $result .= ':'.$response;
4813: &Reply($client, &escape($result)."\n",$userinput);
1.320 albertel 4814: return 1;
1.317 raeburn 4815: }
4816: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
4817:
4818: #
4819: # Retrieve information from localenroll about whether to provide a button
4820: # for users who have enbled import of student photos to initiate an
4821: # update of photo files for registered students. Also include
4822: # comment to display alongside button.
4823:
4824: sub photo_choice_handler {
4825: my ($cmd, $tail, $client) = @_;
4826: my $userinput = "$cmd:$tail";
4827: my $cdom = &unescape($tail);
1.320 albertel 4828: my ($update,$comment);
4829: eval {
4830: local($SIG{__DIE__})='DEFAULT';
4831: ($update,$comment) = &localenroll::manager_photo_update($cdom);
4832: };
4833: if (!$@) {
4834: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
4835: } else {
4836: &Failure($client,"unknown_cmd\n",$userinput);
4837: }
4838: return 1;
1.317 raeburn 4839: }
4840: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
4841:
1.265 albertel 4842: #
4843: # Gets a student's photo to exist (in the correct image type) in the user's
4844: # directory.
4845: # Formal Parameters:
4846: # $cmd - The command request that got us dispatched.
4847: # $tail - A colon separated set of words that will be split into:
4848: # $domain - student's domain
4849: # $uname - student username
4850: # $type - image type desired
4851: # $client - The socket open on the client.
4852: # Returns:
4853: # 1 - continue processing.
1.317 raeburn 4854:
1.265 albertel 4855: sub student_photo_handler {
4856: my ($cmd, $tail, $client) = @_;
1.317 raeburn 4857: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265 albertel 4858:
1.317 raeburn 4859: my $path=&propath($domain,$uname). '/userfiles/internal/';
4860: my $filename = 'studentphoto.'.$ext;
4861: if ($type eq 'thumbnail') {
4862: $filename = 'studentphoto_tn.'.$ext;
4863: }
4864: if (-e $path.$filename) {
1.265 albertel 4865: &Reply($client,"ok\n","$cmd:$tail");
4866: return 1;
4867: }
4868: &mkpath($path);
1.317 raeburn 4869: my $file;
4870: if ($type eq 'thumbnail') {
1.320 albertel 4871: eval {
4872: local($SIG{__DIE__})='DEFAULT';
4873: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
4874: };
1.317 raeburn 4875: } else {
4876: $file=&localstudentphoto::fetch($domain,$uname);
4877: }
1.265 albertel 4878: if (!$file) {
4879: &Failure($client,"unavailable\n","$cmd:$tail");
4880: return 1;
4881: }
1.317 raeburn 4882: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
4883: if (-e $path.$filename) {
1.265 albertel 4884: &Reply($client,"ok\n","$cmd:$tail");
4885: return 1;
4886: }
4887: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4888: return 1;
4889: }
4890: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 4891:
1.361 raeburn 4892: sub inst_usertypes_handler {
4893: my ($cmd, $domain, $client) = @_;
4894: my $res;
4895: my $userinput = $cmd.":".$domain; # For logging purposes.
1.370 albertel 4896: my (%typeshash,@order,$result);
4897: eval {
4898: local($SIG{__DIE__})='DEFAULT';
4899: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
4900: };
4901: if ($result eq 'ok') {
1.361 raeburn 4902: if (keys(%typeshash) > 0) {
4903: foreach my $key (keys(%typeshash)) {
4904: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
4905: }
4906: }
4907: $res=~s/\&$//;
4908: $res .= ':';
4909: if (@order > 0) {
4910: foreach my $item (@order) {
4911: $res .= &escape($item).'&';
4912: }
4913: }
4914: $res=~s/\&$//;
4915: }
1.387 albertel 4916: &Reply($client, \$res, $userinput);
1.361 raeburn 4917: return 1;
4918: }
4919: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
4920:
1.264 albertel 4921: # mkpath makes all directories for a file, expects an absolute path with a
4922: # file or a trailing / if just a dir is passed
4923: # returns 1 on success 0 on failure
4924: sub mkpath {
4925: my ($file)=@_;
4926: my @parts=split(/\//,$file,-1);
4927: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4928: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 4929: $now.='/'.$parts[$i];
1.264 albertel 4930: if (!-e $now) {
4931: if (!mkdir($now,0770)) { return 0; }
4932: }
4933: }
4934: return 1;
4935: }
4936:
1.207 foxr 4937: #---------------------------------------------------------------
4938: #
4939: # Getting, decoding and dispatching requests:
4940: #
4941: #
4942: # Get a Request:
4943: # Gets a Request message from the client. The transaction
4944: # is defined as a 'line' of text. We remove the new line
4945: # from the text line.
1.226 foxr 4946: #
1.211 albertel 4947: sub get_request {
1.207 foxr 4948: my $input = <$client>;
4949: chomp($input);
1.226 foxr 4950:
1.234 foxr 4951: &Debug("get_request: Request = $input\n");
1.207 foxr 4952:
4953: &status('Processing '.$clientname.':'.$input);
4954:
4955: return $input;
4956: }
1.212 foxr 4957: #---------------------------------------------------------------
4958: #
4959: # Process a request. This sub should shrink as each action
4960: # gets farmed out into a separat sub that is registered
4961: # with the dispatch hash.
4962: #
4963: # Parameters:
4964: # user_input - The request received from the client (lonc).
4965: # Returns:
4966: # true to keep processing, false if caller should exit.
4967: #
4968: sub process_request {
4969: my ($userinput) = @_; # Easier for now to break style than to
4970: # fix all the userinput -> user_input.
4971: my $wasenc = 0; # True if request was encrypted.
4972: # ------------------------------------------------------------ See if encrypted
1.322 albertel 4973: # for command
4974: # sethost:<server>
4975: # <command>:<args>
4976: # we just send it to the processor
4977: # for
4978: # sethost:<server>:<command>:<args>
4979: # we do the implict set host and then do the command
4980: if ($userinput =~ /^sethost:/) {
4981: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
4982: if (defined($userinput)) {
4983: &sethost("$cmd:$newid");
4984: } else {
4985: $userinput = "$cmd:$newid";
4986: }
4987: }
4988:
1.212 foxr 4989: if ($userinput =~ /^enc/) {
4990: $userinput = decipher($userinput);
4991: $wasenc=1;
4992: if(!$userinput) { # Cipher not defined.
1.251 foxr 4993: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 4994: return 0;
4995: }
4996: }
4997: Debug("process_request: $userinput\n");
4998:
1.213 foxr 4999: #
5000: # The 'correct way' to add a command to lond is now to
5001: # write a sub to execute it and Add it to the command dispatch
5002: # hash via a call to register_handler.. The comments to that
5003: # sub should give you enough to go on to show how to do this
5004: # along with the examples that are building up as this code
5005: # is getting refactored. Until all branches of the
5006: # if/elseif monster below have been factored out into
5007: # separate procesor subs, if the dispatch hash is missing
5008: # the command keyword, we will fall through to the remainder
5009: # of the if/else chain below in order to keep this thing in
5010: # working order throughout the transmogrification.
5011:
5012: my ($command, $tail) = split(/:/, $userinput, 2);
5013: chomp($command);
5014: chomp($tail);
5015: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 5016: $command =~ s/(\r)//; # And this too for parameterless commands.
5017: if(!$tail) {
5018: $tail =""; # defined but blank.
5019: }
1.213 foxr 5020:
5021: &Debug("Command received: $command, encoded = $wasenc");
5022:
5023: if(defined $Dispatcher{$command}) {
5024:
5025: my $dispatch_info = $Dispatcher{$command};
5026: my $handler = $$dispatch_info[0];
5027: my $need_encode = $$dispatch_info[1];
5028: my $client_types = $$dispatch_info[2];
5029: Debug("Matched dispatch hash: mustencode: $need_encode "
5030: ."ClientType $client_types");
5031:
5032: # Validate the request:
5033:
5034: my $ok = 1;
5035: my $requesterprivs = 0;
5036: if(&isClient()) {
5037: $requesterprivs |= $CLIENT_OK;
5038: }
5039: if(&isManager()) {
5040: $requesterprivs |= $MANAGER_OK;
5041: }
5042: if($need_encode && (!$wasenc)) {
5043: Debug("Must encode but wasn't: $need_encode $wasenc");
5044: $ok = 0;
5045: }
5046: if(($client_types & $requesterprivs) == 0) {
5047: Debug("Client not privileged to do this operation");
5048: $ok = 0;
5049: }
5050:
5051: if($ok) {
5052: Debug("Dispatching to handler $command $tail");
5053: my $keep_going = &$handler($command, $tail, $client);
5054: return $keep_going;
5055: } else {
5056: Debug("Refusing to dispatch because client did not match requirements");
5057: Failure($client, "refused\n", $userinput);
5058: return 1;
5059: }
5060:
5061: }
5062:
1.262 foxr 5063: print $client "unknown_cmd\n";
1.212 foxr 5064: # -------------------------------------------------------------------- complete
5065: Debug("process_request - returning 1");
5066: return 1;
5067: }
1.207 foxr 5068: #
5069: # Decipher encoded traffic
5070: # Parameters:
5071: # input - Encoded data.
5072: # Returns:
5073: # Decoded data or undef if encryption key was not yet negotiated.
5074: # Implicit input:
5075: # cipher - This global holds the negotiated encryption key.
5076: #
1.211 albertel 5077: sub decipher {
1.207 foxr 5078: my ($input) = @_;
5079: my $output = '';
1.212 foxr 5080:
5081:
1.207 foxr 5082: if($cipher) {
5083: my($enc, $enclength, $encinput) = split(/:/, $input);
5084: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5085: $output .=
5086: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5087: }
5088: return substr($output, 0, $enclength);
5089: } else {
5090: return undef;
5091: }
5092: }
5093:
5094: #
5095: # Register a command processor. This function is invoked to register a sub
5096: # to process a request. Once registered, the ProcessRequest sub can automatically
5097: # dispatch requests to an appropriate sub, and do the top level validity checking
5098: # as well:
5099: # - Is the keyword recognized.
5100: # - Is the proper client type attempting the request.
5101: # - Is the request encrypted if it has to be.
5102: # Parameters:
5103: # $request_name - Name of the request being registered.
5104: # This is the command request that will match
5105: # against the hash keywords to lookup the information
5106: # associated with the dispatch information.
5107: # $procedure - Reference to a sub to call to process the request.
5108: # All subs get called as follows:
5109: # Procedure($cmd, $tail, $replyfd, $key)
5110: # $cmd - the actual keyword that invoked us.
5111: # $tail - the tail of the request that invoked us.
5112: # $replyfd- File descriptor connected to the client
5113: # $must_encode - True if the request must be encoded to be good.
5114: # $client_ok - True if it's ok for a client to request this.
5115: # $manager_ok - True if it's ok for a manager to request this.
5116: # Side effects:
5117: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5118: # - On failure, the program will die as it's a bad internal bug to try to
5119: # register a duplicate command handler.
5120: #
1.211 albertel 5121: sub register_handler {
1.212 foxr 5122: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 5123:
5124: # Don't allow duplication#
5125:
5126: if (defined $Dispatcher{$request_name}) {
5127: die "Attempting to define a duplicate request handler for $request_name\n";
5128: }
5129: # Build the client type mask:
5130:
5131: my $client_type_mask = 0;
5132: if($client_ok) {
5133: $client_type_mask |= $CLIENT_OK;
5134: }
5135: if($manager_ok) {
5136: $client_type_mask |= $MANAGER_OK;
5137: }
5138:
5139: # Enter the hash:
5140:
5141: my @entry = ($procedure, $must_encode, $client_type_mask);
5142:
5143: $Dispatcher{$request_name} = \@entry;
5144:
5145: }
5146:
5147:
5148: #------------------------------------------------------------------
5149:
5150:
5151:
5152:
1.141 foxr 5153: #
1.96 foxr 5154: # Convert an error return code from lcpasswd to a string value.
5155: #
5156: sub lcpasswdstrerror {
5157: my $ErrorCode = shift;
1.97 foxr 5158: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 5159: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5160: } else {
1.98 foxr 5161: return $passwderrors[$ErrorCode];
1.96 foxr 5162: }
5163: }
5164:
1.97 foxr 5165: #
5166: # Convert an error return code from lcuseradd to a string value:
5167: #
5168: sub lcuseraddstrerror {
5169: my $ErrorCode = shift;
5170: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
5171: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
5172: } else {
1.98 foxr 5173: return $adderrors[$ErrorCode];
1.97 foxr 5174: }
5175: }
5176:
1.23 harris41 5177: # grabs exception and records it to log before exiting
5178: sub catchexception {
1.27 albertel 5179: my ($error)=@_;
1.25 www 5180: $SIG{'QUIT'}='DEFAULT';
5181: $SIG{__DIE__}='DEFAULT';
1.165 albertel 5182: &status("Catching exception");
1.190 albertel 5183: &logthis("<font color='red'>CRITICAL: "
1.373 albertel 5184: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
1.27 albertel 5185: ."a crash with this error msg->[$error]</font>");
1.57 www 5186: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 5187: if ($client) { print $client "error: $error\n"; }
1.59 www 5188: $server->close();
1.27 albertel 5189: die($error);
1.23 harris41 5190: }
1.63 www 5191: sub timeout {
1.165 albertel 5192: &status("Handling Timeout");
1.190 albertel 5193: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 5194: &catchexception('Timeout');
5195: }
1.22 harris41 5196: # -------------------------------- Set signal handlers to record abnormal exits
5197:
1.226 foxr 5198:
1.22 harris41 5199: $SIG{'QUIT'}=\&catchexception;
5200: $SIG{__DIE__}=\&catchexception;
5201:
1.81 matthew 5202: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 5203: &status("Read loncapa.conf and loncapa_apache.conf");
5204: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 5205: %perlvar=%{$perlvarref};
1.80 harris41 5206: undef $perlvarref;
1.19 www 5207:
1.35 harris41 5208: # ----------------------------- Make sure this process is running from user=www
5209: my $wwwid=getpwnam('www');
5210: if ($wwwid!=$<) {
1.134 albertel 5211: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5212: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 5213: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 5214: mailto $emailto -s '$subj' > /dev/null");
5215: exit 1;
5216: }
5217:
1.19 www 5218: # --------------------------------------------- Check if other instance running
5219:
5220: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
5221:
5222: if (-e $pidfile) {
5223: my $lfh=IO::File->new("$pidfile");
5224: my $pide=<$lfh>;
5225: chomp($pide);
1.29 harris41 5226: if (kill 0 => $pide) { die "already running"; }
1.19 www 5227: }
1.1 albertel 5228:
5229: # ------------------------------------------------------------- Read hosts file
5230:
5231:
5232:
5233: # establish SERVER socket, bind and listen.
5234: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
5235: Type => SOCK_STREAM,
5236: Proto => 'tcp',
5237: Reuse => 1,
5238: Listen => 10 )
1.29 harris41 5239: or die "making socket: $@\n";
1.1 albertel 5240:
5241: # --------------------------------------------------------- Do global variables
5242:
5243: # global variables
5244:
1.134 albertel 5245: my %children = (); # keys are current child process IDs
1.1 albertel 5246:
5247: sub REAPER { # takes care of dead children
5248: $SIG{CHLD} = \&REAPER;
1.165 albertel 5249: &status("Handling child death");
1.178 foxr 5250: my $pid;
5251: do {
5252: $pid = waitpid(-1,&WNOHANG());
5253: if (defined($children{$pid})) {
5254: &logthis("Child $pid died");
5255: delete($children{$pid});
1.183 albertel 5256: } elsif ($pid > 0) {
1.178 foxr 5257: &logthis("Unknown Child $pid died");
5258: }
5259: } while ( $pid > 0 );
5260: foreach my $child (keys(%children)) {
5261: $pid = waitpid($child,&WNOHANG());
5262: if ($pid > 0) {
5263: &logthis("Child $child - $pid looks like we missed it's death");
5264: delete($children{$pid});
5265: }
1.176 albertel 5266: }
1.165 albertel 5267: &status("Finished Handling child death");
1.1 albertel 5268: }
5269:
5270: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 5271: &status("Killing children (INT)");
1.1 albertel 5272: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5273: kill 'INT' => keys %children;
1.59 www 5274: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 5275: my $execdir=$perlvar{'lonDaemons'};
5276: unlink("$execdir/logs/lond.pid");
1.190 albertel 5277: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 5278: &status("Done killing children");
1.1 albertel 5279: exit; # clean up with dignity
5280: }
5281:
5282: sub HUPSMAN { # signal handler for SIGHUP
5283: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 5284: &status("Killing children for restart (HUP)");
1.1 albertel 5285: kill 'INT' => keys %children;
1.59 www 5286: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 5287: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 5288: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 5289: unlink("$execdir/logs/lond.pid");
1.165 albertel 5290: &status("Restarting self (HUP)");
1.1 albertel 5291: exec("$execdir/lond"); # here we go again
5292: }
5293:
1.144 foxr 5294: #
1.148 foxr 5295: # Reload the Apache daemon's state.
1.150 foxr 5296: # This is done by invoking /home/httpd/perl/apachereload
5297: # a setuid perl script that can be root for us to do this job.
1.148 foxr 5298: #
5299: sub ReloadApache {
1.150 foxr 5300: my $execdir = $perlvar{'lonDaemons'};
5301: my $script = $execdir."/apachereload";
5302: system($script);
1.148 foxr 5303: }
5304:
5305: #
1.144 foxr 5306: # Called in response to a USR2 signal.
5307: # - Reread hosts.tab
5308: # - All children connected to hosts that were removed from hosts.tab
5309: # are killed via SIGINT
5310: # - All children connected to previously existing hosts are sent SIGUSR1
5311: # - Our internal hosts hash is updated to reflect the new contents of
5312: # hosts.tab causing connections from hosts added to hosts.tab to
5313: # now be honored.
5314: #
5315: sub UpdateHosts {
1.165 albertel 5316: &status("Reload hosts.tab");
1.147 foxr 5317: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 5318: #
5319: # The %children hash has the set of IP's we currently have children
5320: # on. These need to be matched against records in the hosts.tab
5321: # Any ip's no longer in the table get killed off they correspond to
5322: # either dropped or changed hosts. Note that the re-read of the table
5323: # will take care of new and changed hosts as connections come into being.
5324:
1.371 albertel 5325: &Apache::lonnet::reset_hosts_info();
1.148 foxr 5326:
1.368 albertel 5327: foreach my $child (keys(%children)) {
1.148 foxr 5328: my $childip = $children{$child};
1.374 albertel 5329: if ($childip ne '127.0.0.1'
5330: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
1.149 foxr 5331: logthis('<font color="blue"> UpdateHosts killing child '
5332: ." $child for ip $childip </font>");
1.148 foxr 5333: kill('INT', $child);
1.149 foxr 5334: } else {
5335: logthis('<font color="green"> keeping child for ip '
5336: ." $childip (pid=$child) </font>");
1.148 foxr 5337: }
5338: }
5339: ReloadApache;
1.165 albertel 5340: &status("Finished reloading hosts.tab");
1.144 foxr 5341: }
5342:
1.148 foxr 5343:
1.57 www 5344: sub checkchildren {
1.165 albertel 5345: &status("Checking on the children (sending signals)");
1.57 www 5346: &initnewstatus();
5347: &logstatus();
5348: &logthis('Going to check on the children');
1.134 albertel 5349: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 5350: foreach (sort keys %children) {
1.221 albertel 5351: #sleep 1;
1.57 www 5352: unless (kill 'USR1' => $_) {
5353: &logthis ('Child '.$_.' is dead');
5354: &logstatus($$.' is dead');
1.221 albertel 5355: delete($children{$_});
1.57 www 5356: }
1.61 harris41 5357: }
1.63 www 5358: sleep 5;
1.212 foxr 5359: $SIG{ALRM} = sub { Debug("timeout");
5360: die "timeout"; };
1.113 albertel 5361: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 5362: &status("Checking on the children (waiting for reports)");
1.63 www 5363: foreach (sort keys %children) {
5364: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 5365: eval {
5366: alarm(300);
1.63 www 5367: &logthis('Child '.$_.' did not respond');
1.67 albertel 5368: kill 9 => $_;
1.131 albertel 5369: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5370: #$subj="LON: $currenthostid killed lond process $_";
5371: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
5372: #$execdir=$perlvar{'lonDaemons'};
5373: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 5374: delete($children{$_});
1.113 albertel 5375: alarm(0);
5376: }
1.63 www 5377: }
5378: }
1.113 albertel 5379: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 5380: $SIG{__DIE__} = \&catchexception;
1.165 albertel 5381: &status("Finished checking children");
1.221 albertel 5382: &logthis('Finished Checking children');
1.57 www 5383: }
5384:
1.1 albertel 5385: # --------------------------------------------------------------------- Logging
5386:
5387: sub logthis {
5388: my $message=shift;
5389: my $execdir=$perlvar{'lonDaemons'};
5390: my $fh=IO::File->new(">>$execdir/logs/lond.log");
5391: my $now=time;
5392: my $local=localtime($now);
1.58 www 5393: $lastlog=$local.': '.$message;
1.1 albertel 5394: print $fh "$local ($$): $message\n";
5395: }
5396:
1.77 foxr 5397: # ------------------------- Conditional log if $DEBUG true.
5398: sub Debug {
5399: my $message = shift;
5400: if($DEBUG) {
5401: &logthis($message);
5402: }
5403: }
1.161 foxr 5404:
5405: #
5406: # Sub to do replies to client.. this gives a hook for some
5407: # debug tracing too:
5408: # Parameters:
5409: # fd - File open on client.
5410: # reply - Text to send to client.
5411: # request - Original request from client.
5412: #
5413: sub Reply {
1.192 foxr 5414: my ($fd, $reply, $request) = @_;
1.387 albertel 5415: if (ref($reply)) {
5416: print $fd $$reply;
5417: print $fd "\n";
5418: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
5419: } else {
5420: print $fd $reply;
5421: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
5422: }
1.212 foxr 5423: $Transactions++;
5424: }
5425:
5426:
5427: #
5428: # Sub to report a failure.
5429: # This function:
5430: # - Increments the failure statistic counters.
5431: # - Invokes Reply to send the error message to the client.
5432: # Parameters:
5433: # fd - File descriptor open on the client
5434: # reply - Reply text to emit.
5435: # request - The original request message (used by Reply
5436: # to debug if that's enabled.
5437: # Implicit outputs:
5438: # $Failures- The number of failures is incremented.
5439: # Reply (invoked here) sends a message to the
5440: # client:
5441: #
5442: sub Failure {
5443: my $fd = shift;
5444: my $reply = shift;
5445: my $request = shift;
5446:
5447: $Failures++;
5448: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 5449: }
1.57 www 5450: # ------------------------------------------------------------------ Log status
5451:
5452: sub logstatus {
1.178 foxr 5453: &status("Doing logging");
5454: my $docdir=$perlvar{'lonDocRoot'};
5455: {
5456: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 5457: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 5458: $fh->close();
5459: }
1.221 albertel 5460: &status("Finished $$.txt");
5461: {
5462: open(LOG,">>$docdir/lon-status/londstatus.txt");
5463: flock(LOG,LOCK_EX);
5464: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
5465: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 5466: flock(LOG,LOCK_UN);
1.221 albertel 5467: close(LOG);
5468: }
1.178 foxr 5469: &status("Finished logging");
1.57 www 5470: }
5471:
5472: sub initnewstatus {
5473: my $docdir=$perlvar{'lonDocRoot'};
5474: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
5475: my $now=time;
5476: my $local=localtime($now);
5477: print $fh "LOND status $local - parent $$\n\n";
1.64 www 5478: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 5479: while (my $filename=readdir(DIR)) {
1.64 www 5480: unlink("$docdir/lon-status/londchld/$filename");
5481: }
5482: closedir(DIR);
1.57 www 5483: }
5484:
5485: # -------------------------------------------------------------- Status setting
5486:
5487: sub status {
5488: my $what=shift;
5489: my $now=time;
5490: my $local=localtime($now);
1.178 foxr 5491: $status=$local.': '.$what;
5492: $0='lond: '.$what.' '.$local;
1.57 www 5493: }
1.11 www 5494:
1.13 www 5495: # -------------------------------------------------------------- Talk to lonsql
5496:
1.234 foxr 5497: sub sql_reply {
1.12 harris41 5498: my ($cmd)=@_;
1.234 foxr 5499: my $answer=&sub_sql_reply($cmd);
5500: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 5501: return $answer;
5502: }
5503:
1.234 foxr 5504: sub sub_sql_reply {
1.12 harris41 5505: my ($cmd)=@_;
5506: my $unixsock="mysqlsock";
5507: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5508: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5509: Type => SOCK_STREAM,
5510: Timeout => 10)
5511: or return "con_lost";
1.319 www 5512: print $sclient "$cmd:$currentdomainid\n";
1.12 harris41 5513: my $answer=<$sclient>;
5514: chomp($answer);
5515: if (!$answer) { $answer="con_lost"; }
5516: return $answer;
5517: }
5518:
1.1 albertel 5519: # --------------------------------------- Is this the home server of an author?
1.11 www 5520:
1.1 albertel 5521: sub ishome {
5522: my $author=shift;
5523: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5524: my ($udom,$uname)=split(/\//,$author);
5525: my $proname=propath($udom,$uname);
5526: if (-e $proname) {
5527: return 'owner';
5528: } else {
5529: return 'not_owner';
5530: }
5531: }
5532:
5533: # ======================================================= Continue main program
5534: # ---------------------------------------------------- Fork once and dissociate
5535:
1.134 albertel 5536: my $fpid=fork;
1.1 albertel 5537: exit if $fpid;
1.29 harris41 5538: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 5539:
1.29 harris41 5540: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 5541:
5542: # ------------------------------------------------------- Write our PID on disk
5543:
1.134 albertel 5544: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 5545: open (PIDSAVE,">$execdir/logs/lond.pid");
5546: print PIDSAVE "$$\n";
5547: close(PIDSAVE);
1.190 albertel 5548: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 5549: &status('Starting');
1.1 albertel 5550:
1.106 foxr 5551:
1.1 albertel 5552:
5553: # ----------------------------------------------------- Install signal handlers
5554:
1.57 www 5555:
1.1 albertel 5556: $SIG{CHLD} = \&REAPER;
5557: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5558: $SIG{HUP} = \&HUPSMAN;
1.57 www 5559: $SIG{USR1} = \&checkchildren;
1.144 foxr 5560: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 5561:
1.148 foxr 5562: # Read the host hashes:
1.368 albertel 5563: &Apache::lonnet::load_hosts_tab();
1.106 foxr 5564:
1.286 albertel 5565: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5566:
1.106 foxr 5567: # --------------------------------------------------------------
5568: # Accept connections. When a connection comes in, it is validated
5569: # and if good, a child process is created to process transactions
5570: # along the connection.
5571:
1.1 albertel 5572: while (1) {
1.165 albertel 5573: &status('Starting accept');
1.106 foxr 5574: $client = $server->accept() or next;
1.165 albertel 5575: &status('Accepted '.$client.' off to spawn');
1.386 albertel 5576: make_new_child($client);
1.165 albertel 5577: &status('Finished spawning');
1.1 albertel 5578: }
5579:
1.212 foxr 5580: sub make_new_child {
5581: my $pid;
5582: # my $cipher; # Now global
5583: my $sigset;
1.178 foxr 5584:
1.212 foxr 5585: $client = shift;
5586: &status('Starting new child '.$client);
5587: &logthis('<font color="green"> Attempting to start child ('.$client.
5588: ")</font>");
5589: # block signal for fork
5590: $sigset = POSIX::SigSet->new(SIGINT);
5591: sigprocmask(SIG_BLOCK, $sigset)
5592: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 5593:
1.212 foxr 5594: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 5595:
1.212 foxr 5596: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5597: # connection liveness.
1.178 foxr 5598:
1.212 foxr 5599: #
5600: # Figure out who we're talking to so we can record the peer in
5601: # the pid hash.
5602: #
5603: my $caller = getpeername($client);
5604: my ($port,$iaddr);
5605: if (defined($caller) && length($caller) > 0) {
5606: ($port,$iaddr)=unpack_sockaddr_in($caller);
5607: } else {
5608: &logthis("Unable to determine who caller was, getpeername returned nothing");
5609: }
5610: if (defined($iaddr)) {
5611: $clientip = inet_ntoa($iaddr);
5612: Debug("Connected with $clientip");
5613: } else {
5614: &logthis("Unable to determine clientip");
5615: $clientip='Unavailable';
5616: }
5617:
5618: if ($pid) {
5619: # Parent records the child's birth and returns.
5620: sigprocmask(SIG_UNBLOCK, $sigset)
5621: or die "Can't unblock SIGINT for fork: $!\n";
5622: $children{$pid} = $clientip;
5623: &status('Started child '.$pid);
5624: return;
5625: } else {
5626: # Child can *not* return from this subroutine.
5627: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5628: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5629: #don't get intercepted
5630: $SIG{USR1}= \&logstatus;
5631: $SIG{ALRM}= \&timeout;
5632: $lastlog='Forked ';
5633: $status='Forked';
1.178 foxr 5634:
1.212 foxr 5635: # unblock signals
5636: sigprocmask(SIG_UNBLOCK, $sigset)
5637: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 5638:
1.212 foxr 5639: # my $tmpsnum=0; # Now global
5640: #---------------------------------------------------- kerberos 5 initialization
5641: &Authen::Krb5::init_context();
1.359 raeburn 5642: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
5643: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
1.286 albertel 5644: &Authen::Krb5::init_ets();
5645: }
1.209 albertel 5646:
1.212 foxr 5647: &status('Accepted connection');
5648: # =============================================================================
5649: # do something with the connection
5650: # -----------------------------------------------------------------------------
5651: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 5652:
1.278 albertel 5653: my $outsideip=$clientip;
5654: if ($clientip eq '127.0.0.1') {
1.368 albertel 5655: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
1.278 albertel 5656: }
5657:
1.368 albertel 5658: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
1.278 albertel 5659: my $ismanager=($managers{$outsideip} ne undef);
1.212 foxr 5660: $clientname = "[unknonwn]";
5661: if($clientrec) { # Establish client type.
5662: $ConnectionType = "client";
1.368 albertel 5663: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
1.212 foxr 5664: if($ismanager) {
5665: $ConnectionType = "both";
5666: }
5667: } else {
5668: $ConnectionType = "manager";
1.278 albertel 5669: $clientname = $managers{$outsideip};
1.212 foxr 5670: }
5671: my $clientok;
1.178 foxr 5672:
1.212 foxr 5673: if ($clientrec || $ismanager) {
5674: &status("Waiting for init from $clientip $clientname");
5675: &logthis('<font color="yellow">INFO: Connection, '.
5676: $clientip.
5677: " ($clientname) connection type = $ConnectionType </font>" );
5678: &status("Connecting $clientip ($clientname))");
5679: my $remotereq=<$client>;
5680: chomp($remotereq);
5681: Debug("Got init: $remotereq");
1.337 albertel 5682:
1.212 foxr 5683: if ($remotereq =~ /^init/) {
5684: &sethost("sethost:$perlvar{'lonHostID'}");
5685: #
5686: # If the remote is attempting a local init... give that a try:
5687: #
5688: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 5689:
1.212 foxr 5690: # If the connection type is ssl, but I didn't get my
5691: # certificate files yet, then I'll drop back to
5692: # insecure (if allowed).
5693:
5694: if($inittype eq "ssl") {
5695: my ($ca, $cert) = lonssl::CertificateFile;
5696: my $kfile = lonssl::KeyFile;
5697: if((!$ca) ||
5698: (!$cert) ||
5699: (!$kfile)) {
5700: $inittype = ""; # This forces insecure attempt.
5701: &logthis("<font color=\"blue\"> Certificates not "
5702: ."installed -- trying insecure auth</font>");
1.224 foxr 5703: } else { # SSL certificates are in place so
1.212 foxr 5704: } # Leave the inittype alone.
5705: }
5706:
5707: if($inittype eq "local") {
5708: my $key = LocalConnection($client, $remotereq);
5709: if($key) {
5710: Debug("Got local key $key");
5711: $clientok = 1;
5712: my $cipherkey = pack("H32", $key);
5713: $cipher = new IDEA($cipherkey);
5714: print $client "ok:local\n";
5715: &logthis('<font color="green"'
5716: . "Successful local authentication </font>");
5717: $keymode = "local"
1.178 foxr 5718: } else {
1.212 foxr 5719: Debug("Failed to get local key");
5720: $clientok = 0;
5721: shutdown($client, 3);
5722: close $client;
1.178 foxr 5723: }
1.212 foxr 5724: } elsif ($inittype eq "ssl") {
5725: my $key = SSLConnection($client);
5726: if ($key) {
5727: $clientok = 1;
5728: my $cipherkey = pack("H32", $key);
5729: $cipher = new IDEA($cipherkey);
5730: &logthis('<font color="green">'
5731: ."Successfull ssl authentication with $clientname </font>");
5732: $keymode = "ssl";
5733:
1.178 foxr 5734: } else {
1.212 foxr 5735: $clientok = 0;
5736: close $client;
1.178 foxr 5737: }
1.212 foxr 5738:
5739: } else {
5740: my $ok = InsecureConnection($client);
5741: if($ok) {
5742: $clientok = 1;
5743: &logthis('<font color="green">'
5744: ."Successful insecure authentication with $clientname </font>");
5745: print $client "ok\n";
5746: $keymode = "insecure";
1.178 foxr 5747: } else {
1.212 foxr 5748: &logthis('<font color="yellow">'
5749: ."Attempted insecure connection disallowed </font>");
5750: close $client;
5751: $clientok = 0;
1.178 foxr 5752:
5753: }
5754: }
1.212 foxr 5755: } else {
5756: &logthis(
5757: "<font color='blue'>WARNING: "
5758: ."$clientip failed to initialize: >$remotereq< </font>");
5759: &status('No init '.$clientip);
5760: }
5761:
5762: } else {
5763: &logthis(
5764: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5765: &status('Hung up on '.$clientip);
5766: }
5767:
5768: if ($clientok) {
5769: # ---------------- New known client connecting, could mean machine online again
1.368 albertel 5770: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
1.367 albertel 5771: && $clientip ne '127.0.0.1') {
1.375 albertel 5772: &Apache::lonnet::reconlonc($clientname);
1.212 foxr 5773: }
5774: &logthis("<font color='green'>Established connection: $clientname</font>");
5775: &status('Will listen to '.$clientname);
5776: # ------------------------------------------------------------ Process requests
5777: my $keep_going = 1;
5778: my $user_input;
5779: while(($user_input = get_request) && $keep_going) {
5780: alarm(120);
5781: Debug("Main: Got $user_input\n");
5782: $keep_going = &process_request($user_input);
1.178 foxr 5783: alarm(0);
1.212 foxr 5784: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 5785: }
1.212 foxr 5786:
1.59 www 5787: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 5788: } else {
1.161 foxr 5789: print $client "refused\n";
5790: $client->close();
1.190 albertel 5791: &logthis("<font color='blue'>WARNING: "
1.161 foxr 5792: ."Rejected client $clientip, closing connection</font>");
5793: }
1.212 foxr 5794: }
1.161 foxr 5795:
1.1 albertel 5796: # =============================================================================
1.161 foxr 5797:
1.190 albertel 5798: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 5799: ."Disconnect from $clientip ($clientname)</font>");
5800:
5801:
5802: # this exit is VERY important, otherwise the child will become
5803: # a producer of more and more children, forking yourself into
5804: # process death.
5805: exit;
1.106 foxr 5806:
1.78 foxr 5807: }
1.261 foxr 5808: #
5809: # Determine if a user is an author for the indicated domain.
5810: #
5811: # Parameters:
5812: # domain - domain to check in .
5813: # user - Name of user to check.
5814: #
5815: # Return:
5816: # 1 - User is an author for domain.
5817: # 0 - User is not an author for domain.
5818: sub is_author {
5819: my ($domain, $user) = @_;
5820:
5821: &Debug("is_author: $user @ $domain");
5822:
5823: my $hashref = &tie_user_hash($domain, $user, "roles",
5824: &GDBM_READER());
5825:
5826: # Author role should show up as a key /domain/_au
1.78 foxr 5827:
1.321 albertel 5828: my $key = "/$domain/_au";
5829: my $value;
5830: if (defined($hashref)) {
5831: $value = $hashref->{$key};
5832: }
1.78 foxr 5833:
1.261 foxr 5834: if(defined($value)) {
5835: &Debug("$user @ $domain is an author");
5836: }
5837:
5838: return defined($value);
5839: }
1.78 foxr 5840: #
5841: # Checks to see if the input roleput request was to set
5842: # an author role. If so, invokes the lchtmldir script to set
5843: # up a correct public_html
5844: # Parameters:
5845: # request - The request sent to the rolesput subchunk.
5846: # We're looking for /domain/_au
5847: # domain - The domain in which the user is having roles doctored.
5848: # user - Name of the user for which the role is being put.
5849: # authtype - The authentication type associated with the user.
5850: #
1.289 albertel 5851: sub manage_permissions {
1.192 foxr 5852: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 5853:
1.261 foxr 5854: &Debug("manage_permissions: $request $domain $user $authtype");
5855:
1.78 foxr 5856: # See if the request is of the form /$domain/_au
1.289 albertel 5857: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.78 foxr 5858: my $execdir = $perlvar{'lonDaemons'};
5859: my $userhome= "/home/$user" ;
1.134 albertel 5860: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 5861: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 5862: system("$execdir/lchtmldir $userhome $user $authtype");
5863: }
5864: }
1.222 foxr 5865:
5866:
5867: #
5868: # Return the full path of a user password file, whether it exists or not.
5869: # Parameters:
5870: # domain - Domain in which the password file lives.
5871: # user - name of the user.
5872: # Returns:
5873: # Full passwd path:
5874: #
5875: sub password_path {
5876: my ($domain, $user) = @_;
1.264 albertel 5877: return &propath($domain, $user).'/passwd';
1.222 foxr 5878: }
5879:
5880: # Password Filename
5881: # Returns the path to a passwd file given domain and user... only if
5882: # it exists.
5883: # Parameters:
5884: # domain - Domain in which to search.
5885: # user - username.
5886: # Returns:
5887: # - If the password file exists returns its path.
5888: # - If the password file does not exist, returns undefined.
5889: #
5890: sub password_filename {
5891: my ($domain, $user) = @_;
5892:
5893: Debug ("PasswordFilename called: dom = $domain user = $user");
5894:
5895: my $path = &password_path($domain, $user);
5896: Debug("PasswordFilename got path: $path");
5897: if(-e $path) {
5898: return $path;
5899: } else {
5900: return undef;
5901: }
5902: }
5903:
5904: #
5905: # Rewrite the contents of the user's passwd file.
5906: # Parameters:
5907: # domain - domain of the user.
5908: # name - User's name.
5909: # contents - New contents of the file.
5910: # Returns:
5911: # 0 - Failed.
5912: # 1 - Success.
5913: #
5914: sub rewrite_password_file {
5915: my ($domain, $user, $contents) = @_;
5916:
5917: my $file = &password_filename($domain, $user);
5918: if (defined $file) {
5919: my $pf = IO::File->new(">$file");
5920: if($pf) {
5921: print $pf "$contents\n";
5922: return 1;
5923: } else {
5924: return 0;
5925: }
5926: } else {
5927: return 0;
5928: }
5929:
5930: }
5931:
1.78 foxr 5932: #
1.222 foxr 5933: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5934:
5935: # Returns the authorization type or nouser if there is no such user.
5936: #
1.222 foxr 5937: sub get_auth_type
1.78 foxr 5938: {
1.192 foxr 5939:
5940: my ($domain, $user) = @_;
1.78 foxr 5941:
1.222 foxr 5942: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5943: my $proname = &propath($domain, $user);
5944: my $passwdfile = "$proname/passwd";
5945: if( -e $passwdfile ) {
5946: my $pf = IO::File->new($passwdfile);
5947: my $realpassword = <$pf>;
5948: chomp($realpassword);
1.79 foxr 5949: Debug("Password info = $realpassword\n");
1.78 foxr 5950: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5951: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5952: return "$authtype:$contentpwd";
1.224 foxr 5953: } else {
1.79 foxr 5954: Debug("Returning nouser");
1.78 foxr 5955: return "nouser";
5956: }
1.1 albertel 5957: }
5958:
1.220 foxr 5959: #
5960: # Validate a user given their domain, name and password. This utility
5961: # function is used by both AuthenticateHandler and ChangePasswordHandler
5962: # to validate the login credentials of a user.
5963: # Parameters:
5964: # $domain - The domain being logged into (this is required due to
5965: # the capability for multihomed systems.
5966: # $user - The name of the user being validated.
5967: # $password - The user's propoposed password.
5968: #
5969: # Returns:
5970: # 1 - The domain,user,pasword triplet corresponds to a valid
5971: # user.
5972: # 0 - The domain,user,password triplet is not a valid user.
5973: #
5974: sub validate_user {
5975: my ($domain, $user, $password) = @_;
5976:
5977:
5978: # Why negative ~pi you may well ask? Well this function is about
5979: # authentication, and therefore very important to get right.
5980: # I've initialized the flag that determines whether or not I've
5981: # validated correctly to a value it's not supposed to get.
5982: # At the end of this function. I'll ensure that it's not still that
5983: # value so we don't just wind up returning some accidental value
5984: # as a result of executing an unforseen code path that
1.249 foxr 5985: # did not set $validated. At the end of valid execution paths,
5986: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5987:
5988: my $validated = -3.14159;
5989:
5990: # How we authenticate is determined by the type of authentication
5991: # the user has been assigned. If the authentication type is
5992: # "nouser", the user does not exist so we will return 0.
5993:
1.222 foxr 5994: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5995: my ($howpwd, $contentpwd) = split(/:/, $contents);
5996:
5997: my $null = pack("C",0); # Used by kerberos auth types.
5998:
5999: if ($howpwd ne 'nouser') {
6000:
6001: if($howpwd eq "internal") { # Encrypted is in local password file.
6002: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6003: }
6004: elsif ($howpwd eq "unix") { # User is a normal unix user.
6005: $contentpwd = (getpwnam($user))[1];
6006: if($contentpwd) {
6007: if($contentpwd eq 'x') { # Shadow password file...
6008: my $pwauth_path = "/usr/local/sbin/pwauth";
6009: open PWAUTH, "|$pwauth_path" or
6010: die "Cannot invoke authentication";
6011: print PWAUTH "$user\n$password\n";
6012: close PWAUTH;
6013: $validated = ! $?;
6014:
6015: } else { # Passwords in /etc/passwd.
6016: $validated = (crypt($password,
6017: $contentpwd) eq $contentpwd);
6018: }
6019: } else {
6020: $validated = 0;
6021: }
6022: }
6023: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6024: if(! ($password =~ /$null/) ) {
6025: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6026: "",
6027: $contentpwd,,
6028: 'krbtgt',
6029: $contentpwd,
6030: 1,
6031: $password);
6032: if(!$k4error) {
6033: $validated = 1;
1.224 foxr 6034: } else {
1.220 foxr 6035: $validated = 0;
6036: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6037: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6038: }
1.224 foxr 6039: } else {
1.220 foxr 6040: $validated = 0; # Password has a match with null.
6041: }
1.224 foxr 6042: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 6043: if(!($password =~ /$null/)) { # Null password not allowed.
6044: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6045: .$contentpwd);
6046: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6047: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6048: my $credentials= &Authen::Krb5::cc_default();
1.359 raeburn 6049: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6050: .$contentpwd));
1.394 raeburn 6051: my $krbreturn;
6052: if (exists(&Authen::Krb5::get_init_creds_password)) {
6053: $krbreturn =
6054: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6055: $krbservice);
6056: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6057: } else {
6058: $krbreturn =
6059: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6060: $password,$credentials);
6061: $validated = ($krbreturn == 1);
6062: }
1.380 albertel 6063: if (!$validated) {
6064: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6065: &Authen::Krb5::error());
6066: }
1.224 foxr 6067: } else {
1.220 foxr 6068: $validated = 0;
6069: }
1.224 foxr 6070: } elsif ($howpwd eq "localauth") {
1.220 foxr 6071: # Authenticate via installation specific authentcation method:
6072: $validated = &localauth::localauth($user,
6073: $password,
1.353 albertel 6074: $contentpwd,
6075: $domain);
1.358 albertel 6076: if ($validated < 0) {
1.357 albertel 6077: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6078: $validated = 0;
6079: }
1.224 foxr 6080: } else { # Unrecognized auth is also bad.
1.220 foxr 6081: $validated = 0;
6082: }
6083: } else {
6084: $validated = 0;
6085: }
6086: #
6087: # $validated has the correct stat of the authentication:
6088: #
6089:
6090: unless ($validated != -3.14159) {
1.249 foxr 6091: # I >really really< want to know if this happens.
6092: # since it indicates that user authentication is badly
6093: # broken in some code path.
6094: #
6095: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 6096: }
6097: return $validated;
6098: }
6099:
6100:
1.84 albertel 6101: sub addline {
6102: my ($fname,$hostid,$ip,$newline)=@_;
6103: my $contents;
6104: my $found=0;
1.355 albertel 6105: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
1.134 albertel 6106: my $sh;
1.84 albertel 6107: if ($sh=IO::File->new("$fname.subscription")) {
6108: while (my $subline=<$sh>) {
6109: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
6110: }
6111: $sh->close();
6112: }
6113: $sh=IO::File->new(">$fname.subscription");
6114: if ($contents) { print $sh $contents; }
6115: if ($newline) { print $sh $newline; }
6116: $sh->close();
6117: return $found;
1.86 www 6118: }
6119:
1.234 foxr 6120: sub get_chat {
1.324 raeburn 6121: my ($cdom,$cname,$udom,$uname,$group)=@_;
1.310 albertel 6122:
1.87 www 6123: my @entries=();
1.324 raeburn 6124: my $namespace = 'nohist_chatroom';
6125: my $namespace_inroom = 'nohist_inchatroom';
1.335 albertel 6126: if ($group ne '') {
1.324 raeburn 6127: $namespace .= '_'.$group;
6128: $namespace_inroom .= '_'.$group;
6129: }
6130: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 6131: &GDBM_READER());
6132: if ($hashref) {
6133: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311 albertel 6134: &untie_user_hash($hashref);
1.123 www 6135: }
1.124 www 6136: my @participants=();
1.134 albertel 6137: my $cutoff=time-60;
1.324 raeburn 6138: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
1.310 albertel 6139: &GDBM_WRCREAT());
6140: if ($hashref) {
6141: $hashref->{$uname.':'.$udom}=time;
6142: foreach my $user (sort(keys(%$hashref))) {
6143: if ($hashref->{$user}>$cutoff) {
6144: push(@participants, 'active_participant:'.$user);
1.123 www 6145: }
6146: }
1.311 albertel 6147: &untie_user_hash($hashref);
1.86 www 6148: }
1.124 www 6149: return (@participants,@entries);
1.86 www 6150: }
6151:
1.234 foxr 6152: sub chat_add {
1.324 raeburn 6153: my ($cdom,$cname,$newchat,$group)=@_;
1.88 albertel 6154: my @entries=();
1.142 www 6155: my $time=time;
1.324 raeburn 6156: my $namespace = 'nohist_chatroom';
6157: my $logfile = 'chatroom.log';
1.335 albertel 6158: if ($group ne '') {
1.324 raeburn 6159: $namespace .= '_'.$group;
6160: $logfile = 'chatroom_'.$group.'.log';
6161: }
6162: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 6163: &GDBM_WRCREAT());
6164: if ($hashref) {
6165: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88 albertel 6166: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
6167: my ($thentime,$idnum)=split(/\_/,$lastid);
6168: my $newid=$time.'_000000';
6169: if ($thentime==$time) {
6170: $idnum=~s/^0+//;
6171: $idnum++;
6172: $idnum=substr('000000'.$idnum,-6,6);
6173: $newid=$time.'_'.$idnum;
6174: }
1.310 albertel 6175: $hashref->{$newid}=$newchat;
1.88 albertel 6176: my $expired=$time-3600;
1.310 albertel 6177: foreach my $comment (keys(%$hashref)) {
6178: my ($thistime) = ($comment=~/(\d+)\_/);
1.88 albertel 6179: if ($thistime<$expired) {
1.310 albertel 6180: delete $hashref->{$comment};
1.88 albertel 6181: }
6182: }
1.310 albertel 6183: {
6184: my $proname=&propath($cdom,$cname);
1.324 raeburn 6185: if (open(CHATLOG,">>$proname/$logfile")) {
1.310 albertel 6186: print CHATLOG ("$time:".&unescape($newchat)."\n");
6187: }
6188: close(CHATLOG);
1.142 www 6189: }
1.311 albertel 6190: &untie_user_hash($hashref);
1.86 www 6191: }
1.84 albertel 6192: }
6193:
6194: sub unsub {
6195: my ($fname,$clientip)=@_;
6196: my $result;
1.188 foxr 6197: my $unsubs = 0; # Number of successful unsubscribes:
6198:
6199:
6200: # An old way subscriptions were handled was to have a
6201: # subscription marker file:
6202:
6203: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 6204: if (unlink("$fname.$clientname")) {
1.188 foxr 6205: $unsubs++; # Successful unsub via marker file.
6206: }
6207:
6208: # The more modern way to do it is to have a subscription list
6209: # file:
6210:
1.84 albertel 6211: if (-e "$fname.subscription") {
1.161 foxr 6212: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 6213: if ($found) {
6214: $unsubs++;
6215: }
6216: }
6217:
6218: # If either or both of these mechanisms succeeded in unsubscribing a
6219: # resource we can return ok:
6220:
6221: if($unsubs) {
6222: $result = "ok\n";
1.84 albertel 6223: } else {
1.188 foxr 6224: $result = "not_subscribed\n";
1.84 albertel 6225: }
1.188 foxr 6226:
1.84 albertel 6227: return $result;
6228: }
6229:
1.101 www 6230: sub currentversion {
6231: my $fname=shift;
6232: my $version=-1;
6233: my $ulsdir='';
6234: if ($fname=~/^(.+)\/[^\/]+$/) {
6235: $ulsdir=$1;
6236: }
1.114 albertel 6237: my ($fnamere1,$fnamere2);
6238: # remove version if already specified
1.101 www 6239: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 6240: # get the bits that go before and after the version number
6241: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
6242: $fnamere1=$1;
6243: $fnamere2='.'.$2;
6244: }
1.101 www 6245: if (-e $fname) { $version=1; }
6246: if (-e $ulsdir) {
1.134 albertel 6247: if(-d $ulsdir) {
6248: if (opendir(LSDIR,$ulsdir)) {
6249: my $ulsfn;
6250: while ($ulsfn=readdir(LSDIR)) {
1.101 www 6251: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 6252: my $thisfile=$ulsdir.'/'.$ulsfn;
6253: unless (-l $thisfile) {
1.160 www 6254: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 6255: if ($1>$version) { $version=$1; }
6256: }
6257: }
6258: }
6259: closedir(LSDIR);
6260: $version++;
6261: }
6262: }
6263: }
6264: return $version;
1.101 www 6265: }
6266:
6267: sub thisversion {
6268: my $fname=shift;
6269: my $version=-1;
6270: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
6271: $version=$1;
6272: }
6273: return $version;
6274: }
6275:
1.84 albertel 6276: sub subscribe {
6277: my ($userinput,$clientip)=@_;
6278: my $result;
1.293 albertel 6279: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 6280: my $ownership=&ishome($fname);
6281: if ($ownership eq 'owner') {
1.101 www 6282: # explitly asking for the current version?
6283: unless (-e $fname) {
6284: my $currentversion=¤tversion($fname);
6285: if (&thisversion($fname)==$currentversion) {
6286: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
6287: my $root=$1;
6288: my $extension=$2;
6289: symlink($root.'.'.$extension,
6290: $root.'.'.$currentversion.'.'.$extension);
1.102 www 6291: unless ($extension=~/\.meta$/) {
6292: symlink($root.'.'.$extension.'.meta',
6293: $root.'.'.$currentversion.'.'.$extension.'.meta');
6294: }
1.101 www 6295: }
6296: }
6297: }
1.84 albertel 6298: if (-e $fname) {
6299: if (-d $fname) {
6300: $result="directory\n";
6301: } else {
1.161 foxr 6302: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 6303: my $now=time;
1.161 foxr 6304: my $found=&addline($fname,$clientname,$clientip,
6305: "$clientname:$clientip:$now\n");
1.84 albertel 6306: if ($found) { $result="$fname\n"; }
6307: # if they were subscribed to only meta data, delete that
6308: # subscription, when you subscribe to a file you also get
6309: # the metadata
6310: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
6311: $fname=~s/\/home\/httpd\/html\/res/raw/;
1.373 albertel 6312: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
1.84 albertel 6313: $result="$fname\n";
6314: }
6315: } else {
6316: $result="not_found\n";
6317: }
6318: } else {
6319: $result="rejected\n";
6320: }
6321: return $result;
6322: }
1.287 foxr 6323: # Change the passwd of a unix user. The caller must have
6324: # first verified that the user is a loncapa user.
6325: #
6326: # Parameters:
6327: # user - Unix user name to change.
6328: # pass - New password for the user.
6329: # Returns:
6330: # ok - if success
6331: # other - Some meaningfule error message string.
6332: # NOTE:
6333: # invokes a setuid script to change the passwd.
6334: sub change_unix_password {
6335: my ($user, $pass) = @_;
6336:
6337: &Debug("change_unix_password");
6338: my $execdir=$perlvar{'lonDaemons'};
6339: &Debug("Opening lcpasswd pipeline");
6340: my $pf = IO::File->new("|$execdir/lcpasswd > "
6341: ."$perlvar{'lonDaemons'}"
6342: ."/logs/lcpasswd.log");
6343: print $pf "$user\n$pass\n$pass\n";
6344: close $pf;
6345: my $err = $?;
6346: return ($err < @passwderrors) ? $passwderrors[$err] :
6347: "pwchange_falure - unknown error";
6348:
6349:
6350: }
6351:
1.91 albertel 6352:
6353: sub make_passwd_file {
1.98 foxr 6354: my ($uname, $umode,$npass,$passfilename)=@_;
1.390 raeburn 6355: my $result="ok";
1.91 albertel 6356: if ($umode eq 'krb4' or $umode eq 'krb5') {
6357: {
6358: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6359: if ($pf) {
6360: print $pf "$umode:$npass\n";
6361: } else {
6362: $result = "pass_file_failed_error";
6363: }
1.91 albertel 6364: }
6365: } elsif ($umode eq 'internal') {
6366: my $salt=time;
6367: $salt=substr($salt,6,2);
6368: my $ncpass=crypt($npass,$salt);
6369: {
6370: &Debug("Creating internal auth");
6371: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6372: if($pf) {
6373: print $pf "internal:$ncpass\n";
6374: } else {
6375: $result = "pass_file_failed_error";
6376: }
1.91 albertel 6377: }
6378: } elsif ($umode eq 'localauth') {
6379: {
6380: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6381: if($pf) {
6382: print $pf "localauth:$npass\n";
6383: } else {
6384: $result = "pass_file_failed_error";
6385: }
1.91 albertel 6386: }
6387: } elsif ($umode eq 'unix') {
6388: {
1.186 foxr 6389: #
6390: # Don't allow the creation of privileged accounts!!! that would
6391: # be real bad!!!
6392: #
6393: my $uid = getpwnam($uname);
6394: if((defined $uid) && ($uid == 0)) {
6395: &logthis(">>>Attempted to create privilged account blocked");
6396: return "no_priv_account_error\n";
6397: }
6398:
1.223 foxr 6399: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 6400:
6401: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 6402: {
6403: &Debug("Executing external: ".$execpath);
1.98 foxr 6404: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 6405: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 6406: print $se "$uname\n";
6407: print $se "$npass\n";
6408: print $se "$npass\n";
1.223 foxr 6409: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 6410: }
1.285 foxr 6411: if (-r $lc_error_file) {
6412: &Debug("Opening error file: $lc_error_file");
6413: my $error = IO::File->new("< $lc_error_file");
6414: my $useraddok = <$error>;
6415: $error->close;
6416: unlink($lc_error_file);
6417:
6418: chomp $useraddok;
6419:
6420: if($useraddok > 0) {
6421: my $error_text = &lcuseraddstrerror($useraddok);
6422: &logthis("Failed lcuseradd: $error_text");
1.390 raeburn 6423: $result = "lcuseradd_failed:$error_text";
1.285 foxr 6424: } else {
6425: my $pf = IO::File->new(">$passfilename");
6426: if($pf) {
6427: print $pf "unix:\n";
6428: } else {
6429: $result = "pass_file_failed_error";
6430: }
6431: }
1.224 foxr 6432: } else {
1.285 foxr 6433: &Debug("Could not locate lcuseradd error: $lc_error_file");
6434: $result="bug_lcuseradd_no_output_file";
1.91 albertel 6435: }
6436: }
6437: } elsif ($umode eq 'none') {
6438: {
1.223 foxr 6439: my $pf = IO::File->new("> $passfilename");
1.261 foxr 6440: if($pf) {
6441: print $pf "none:\n";
6442: } else {
6443: $result = "pass_file_failed_error";
6444: }
1.91 albertel 6445: }
6446: } else {
1.390 raeburn 6447: $result="auth_mode_error";
1.91 albertel 6448: }
6449: return $result;
1.121 albertel 6450: }
6451:
1.265 albertel 6452: sub convert_photo {
6453: my ($start,$dest)=@_;
6454: system("convert $start $dest");
6455: }
6456:
1.121 albertel 6457: sub sethost {
6458: my ($remotereq) = @_;
6459: my (undef,$hostid)=split(/:/,$remotereq);
1.322 albertel 6460: # ignore sethost if we are already correct
6461: if ($hostid eq $currenthostid) {
6462: return 'ok';
6463: }
6464:
1.121 albertel 6465: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
1.368 albertel 6466: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
6467: eq &Apache::lonnet::get_host_ip($hostid)) {
1.200 matthew 6468: $currenthostid =$hostid;
1.369 albertel 6469: $currentdomainid=&Apache::lonnet::host_domain($hostid);
1.386 albertel 6470: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
1.121 albertel 6471: } else {
6472: &logthis("Requested host id $hostid not an alias of ".
6473: $perlvar{'lonHostID'}." refusing connection");
6474: return 'unable_to_set';
6475: }
6476: return 'ok';
6477: }
6478:
6479: sub version {
6480: my ($userinput)=@_;
6481: $remoteVERSION=(split(/:/,$userinput))[1];
6482: return "version:$VERSION";
1.127 albertel 6483: }
1.178 foxr 6484:
1.200 matthew 6485:
1.61 harris41 6486: # ----------------------------------- POD (plain old documentation, CPAN style)
6487:
6488: =head1 NAME
6489:
6490: lond - "LON Daemon" Server (port "LOND" 5663)
6491:
6492: =head1 SYNOPSIS
6493:
1.74 harris41 6494: Usage: B<lond>
6495:
6496: Should only be run as user=www. This is a command-line script which
6497: is invoked by B<loncron>. There is no expectation that a typical user
6498: will manually start B<lond> from the command-line. (In other words,
6499: DO NOT START B<lond> YOURSELF.)
1.61 harris41 6500:
6501: =head1 DESCRIPTION
6502:
1.74 harris41 6503: There are two characteristics associated with the running of B<lond>,
6504: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6505: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6506: subscriptions, etc). These are described in two large
6507: sections below.
6508:
6509: B<PROCESS MANAGEMENT>
6510:
1.61 harris41 6511: Preforker - server who forks first. Runs as a daemon. HUPs.
6512: Uses IDEA encryption
6513:
1.74 harris41 6514: B<lond> forks off children processes that correspond to the other servers
6515: in the network. Management of these processes can be done at the
6516: parent process level or the child process level.
6517:
6518: B<logs/lond.log> is the location of log messages.
6519:
6520: The process management is now explained in terms of linux shell commands,
6521: subroutines internal to this code, and signal assignments:
6522:
6523: =over 4
6524:
6525: =item *
6526:
6527: PID is stored in B<logs/lond.pid>
6528:
6529: This is the process id number of the parent B<lond> process.
6530:
6531: =item *
6532:
6533: SIGTERM and SIGINT
6534:
6535: Parent signal assignment:
6536: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6537:
6538: Child signal assignment:
6539: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6540: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6541: to restart a new child.)
6542:
6543: Command-line invocations:
6544: B<kill> B<-s> SIGTERM I<PID>
6545: B<kill> B<-s> SIGINT I<PID>
6546:
6547: Subroutine B<HUNTSMAN>:
6548: This is only invoked for the B<lond> parent I<PID>.
6549: This kills all the children, and then the parent.
6550: The B<lonc.pid> file is cleared.
6551:
6552: =item *
6553:
6554: SIGHUP
6555:
6556: Current bug:
6557: This signal can only be processed the first time
6558: on the parent process. Subsequent SIGHUP signals
6559: have no effect.
6560:
6561: Parent signal assignment:
6562: $SIG{HUP} = \&HUPSMAN;
6563:
6564: Child signal assignment:
6565: none (nothing happens)
6566:
6567: Command-line invocations:
6568: B<kill> B<-s> SIGHUP I<PID>
6569:
6570: Subroutine B<HUPSMAN>:
6571: This is only invoked for the B<lond> parent I<PID>,
6572: This kills all the children, and then the parent.
6573: The B<lond.pid> file is cleared.
6574:
6575: =item *
6576:
6577: SIGUSR1
6578:
6579: Parent signal assignment:
6580: $SIG{USR1} = \&USRMAN;
6581:
6582: Child signal assignment:
6583: $SIG{USR1}= \&logstatus;
6584:
6585: Command-line invocations:
6586: B<kill> B<-s> SIGUSR1 I<PID>
6587:
6588: Subroutine B<USRMAN>:
6589: When invoked for the B<lond> parent I<PID>,
6590: SIGUSR1 is sent to all the children, and the status of
6591: each connection is logged.
1.144 foxr 6592:
6593: =item *
6594:
6595: SIGUSR2
6596:
6597: Parent Signal assignment:
6598: $SIG{USR2} = \&UpdateHosts
6599:
6600: Child signal assignment:
6601: NONE
6602:
1.74 harris41 6603:
6604: =item *
6605:
6606: SIGCHLD
6607:
6608: Parent signal assignment:
6609: $SIG{CHLD} = \&REAPER;
6610:
6611: Child signal assignment:
6612: none
6613:
6614: Command-line invocations:
6615: B<kill> B<-s> SIGCHLD I<PID>
6616:
6617: Subroutine B<REAPER>:
6618: This is only invoked for the B<lond> parent I<PID>.
6619: Information pertaining to the child is removed.
6620: The socket port is cleaned up.
6621:
6622: =back
6623:
6624: B<SERVER-SIDE ACTIVITIES>
6625:
6626: Server-side information can be accepted in an encrypted or non-encrypted
6627: method.
6628:
6629: =over 4
6630:
6631: =item ping
6632:
6633: Query a client in the hosts.tab table; "Are you there?"
6634:
6635: =item pong
6636:
6637: Respond to a ping query.
6638:
6639: =item ekey
6640:
6641: Read in encrypted key, make cipher. Respond with a buildkey.
6642:
6643: =item load
6644:
6645: Respond with CPU load based on a computation upon /proc/loadavg.
6646:
6647: =item currentauth
6648:
6649: Reply with current authentication information (only over an
6650: encrypted channel).
6651:
6652: =item auth
6653:
6654: Only over an encrypted channel, reply as to whether a user's
6655: authentication information can be validated.
6656:
6657: =item passwd
6658:
6659: Allow for a password to be set.
6660:
6661: =item makeuser
6662:
6663: Make a user.
6664:
6665: =item passwd
6666:
6667: Allow for authentication mechanism and password to be changed.
6668:
6669: =item home
1.61 harris41 6670:
1.74 harris41 6671: Respond to a question "are you the home for a given user?"
6672:
6673: =item update
6674:
6675: Update contents of a subscribed resource.
6676:
6677: =item unsubscribe
6678:
6679: The server is unsubscribing from a resource.
6680:
6681: =item subscribe
6682:
6683: The server is subscribing to a resource.
6684:
6685: =item log
6686:
6687: Place in B<logs/lond.log>
6688:
6689: =item put
6690:
6691: stores hash in namespace
6692:
1.230 foxr 6693: =item rolesputy
1.74 harris41 6694:
6695: put a role into a user's environment
6696:
6697: =item get
6698:
6699: returns hash with keys from array
6700: reference filled in from namespace
6701:
6702: =item eget
6703:
6704: returns hash with keys from array
6705: reference filled in from namesp (encrypts the return communication)
6706:
6707: =item rolesget
6708:
6709: get a role from a user's environment
6710:
6711: =item del
6712:
6713: deletes keys out of array from namespace
6714:
6715: =item keys
6716:
6717: returns namespace keys
6718:
6719: =item dump
6720:
6721: dumps the complete (or key matching regexp) namespace into a hash
6722:
6723: =item store
6724:
6725: stores hash permanently
6726: for this url; hashref needs to be given and should be a \%hashname; the
6727: remaining args aren't required and if they aren't passed or are '' they will
6728: be derived from the ENV
6729:
6730: =item restore
6731:
6732: returns a hash for a given url
6733:
6734: =item querysend
6735:
6736: Tells client about the lonsql process that has been launched in response
6737: to a sent query.
6738:
6739: =item queryreply
6740:
6741: Accept information from lonsql and make appropriate storage in temporary
6742: file space.
6743:
6744: =item idput
6745:
6746: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6747: for each student, defined perhaps by the institutional Registrar.)
6748:
6749: =item idget
6750:
6751: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6752: for each student, defined perhaps by the institutional Registrar.)
6753:
6754: =item tmpput
6755:
6756: Accept and store information in temporary space.
6757:
6758: =item tmpget
6759:
6760: Send along temporarily stored information.
6761:
6762: =item ls
6763:
6764: List part of a user's directory.
6765:
1.135 foxr 6766: =item pushtable
6767:
6768: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6769: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6770: must be restored manually in case of a problem with the new table file.
6771: pushtable requires that the request be encrypted and validated via
6772: ValidateManager. The form of the command is:
6773: enc:pushtable tablename <tablecontents> \n
6774: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6775: cleartext newline.
6776:
1.74 harris41 6777: =item Hanging up (exit or init)
6778:
6779: What to do when a client tells the server that they (the client)
6780: are leaving the network.
6781:
6782: =item unknown command
6783:
6784: If B<lond> is sent an unknown command (not in the list above),
6785: it replys to the client "unknown_cmd".
1.135 foxr 6786:
1.74 harris41 6787:
6788: =item UNKNOWN CLIENT
6789:
6790: If the anti-spoofing algorithm cannot verify the client,
6791: the client is rejected (with a "refused" message sent
6792: to the client, and the connection is closed.
6793:
6794: =back
1.61 harris41 6795:
6796: =head1 PREREQUISITES
6797:
6798: IO::Socket
6799: IO::File
6800: Apache::File
6801: POSIX
6802: Crypt::IDEA
6803: LWP::UserAgent()
6804: GDBM_File
6805: Authen::Krb4
1.91 albertel 6806: Authen::Krb5
1.61 harris41 6807:
6808: =head1 COREQUISITES
6809:
6810: =head1 OSNAMES
6811:
6812: linux
6813:
6814: =head1 SCRIPT CATEGORIES
6815:
6816: Server/Process
6817:
6818: =cut
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