1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.454 2010/08/22 19:28:26 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA;
35: use LONCAPA::Configuration;
36:
37: use IO::Socket;
38: use IO::File;
39: #use Apache::File;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
43: use Digest::MD5 qw(md5_hex);
44: use GDBM_File;
45: use Authen::Krb5;
46: use localauth;
47: use localenroll;
48: use localstudentphoto;
49: use File::Copy;
50: use File::Find;
51: use LONCAPA::lonlocal;
52: use LONCAPA::lonssl;
53: use Fcntl qw(:flock);
54: use Apache::lonnet;
55:
56: my $DEBUG = 0; # Non zero to enable debug log entries.
57:
58: my $status='';
59: my $lastlog='';
60:
61: my $VERSION='$Revision: 1.454 $'; #' stupid emacs
62: my $remoteVERSION;
63: my $currenthostid="default";
64: my $currentdomainid;
65:
66: my $client;
67: my $clientip; # IP address of client.
68: my $clientname; # LonCAPA name of client.
69: my $clientversion; # LonCAPA version running on client.
70: my $clienthomedom; # LonCAPA domain of homeID for client.
71: # primary library server.
72:
73: my $server;
74:
75: my $keymode;
76:
77: my $cipher; # Cipher key negotiated with client
78: my $tmpsnum = 0; # Id of tmpputs.
79:
80: #
81: # Connection type is:
82: # client - All client actions are allowed
83: # manager - only management functions allowed.
84: # both - Both management and client actions are allowed
85: #
86:
87: my $ConnectionType;
88:
89: my %managers; # Ip -> manager names
90:
91: my %perlvar; # Will have the apache conf defined perl vars.
92:
93: #
94: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
95: # Each element of the hash contains a reference to an array that contains:
96: # A reference to a sub that executes the request corresponding to the keyword.
97: # A flag that is true if the request must be encoded to be acceptable.
98: # A mask with bits as follows:
99: # CLIENT_OK - Set when the function is allowed by ordinary clients
100: # MANAGER_OK - Set when the function is allowed to manager clients.
101: #
102: my $CLIENT_OK = 1;
103: my $MANAGER_OK = 2;
104: my %Dispatcher;
105:
106:
107: #
108: # The array below are password error strings."
109: #
110: my $lastpwderror = 13; # Largest error number from lcpasswd.
111: my @passwderrors = ("ok",
112: "pwchange_failure - lcpasswd must be run as user 'www'",
113: "pwchange_failure - lcpasswd got incorrect number of arguments",
114: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
115: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
116: "pwchange_failure - lcpasswd User does not exist.",
117: "pwchange_failure - lcpasswd Incorrect current passwd",
118: "pwchange_failure - lcpasswd Unable to su to root.",
119: "pwchange_failure - lcpasswd Cannot set new passwd.",
120: "pwchange_failure - lcpasswd Username has invalid characters",
121: "pwchange_failure - lcpasswd Invalid characters in password",
122: "pwchange_failure - lcpasswd User already exists",
123: "pwchange_failure - lcpasswd Something went wrong with user addition.",
124: "pwchange_failure - lcpasswd Password mismatch",
125: "pwchange_failure - lcpasswd Error filename is invalid");
126:
127:
128: # The array below are lcuseradd error strings.:
129:
130: my $lastadderror = 13;
131: my @adderrors = ("ok",
132: "User ID mismatch, lcuseradd must run as user www",
133: "lcuseradd Incorrect number of command line parameters must be 3",
134: "lcuseradd Incorrect number of stdinput lines, must be 3",
135: "lcuseradd Too many other simultaneous pwd changes in progress",
136: "lcuseradd User does not exist",
137: "lcuseradd Unable to make www member of users's group",
138: "lcuseradd Unable to su to root",
139: "lcuseradd Unable to set password",
140: "lcuseradd Username has invalid characters",
141: "lcuseradd Password has an invalid character",
142: "lcuseradd User already exists",
143: "lcuseradd Could not add user.",
144: "lcuseradd Password mismatch");
145:
146:
147: # This array are the errors from lcinstallfile:
148:
149: my @installerrors = ("ok",
150: "Initial user id of client not that of www",
151: "Usage error, not enough command line arguments",
152: "Source file name does not exist",
153: "Destination file name does not exist",
154: "Some file operation failed",
155: "Invalid table filename."
156: );
157:
158: #
159: # Statistics that are maintained and dislayed in the status line.
160: #
161: my $Transactions = 0; # Number of attempted transactions.
162: my $Failures = 0; # Number of transcations failed.
163:
164: # ResetStatistics:
165: # Resets the statistics counters:
166: #
167: sub ResetStatistics {
168: $Transactions = 0;
169: $Failures = 0;
170: }
171:
172: #------------------------------------------------------------------------
173: #
174: # LocalConnection
175: # Completes the formation of a locally authenticated connection.
176: # This function will ensure that the 'remote' client is really the
177: # local host. If not, the connection is closed, and the function fails.
178: # If so, initcmd is parsed for the name of a file containing the
179: # IDEA session key. The fie is opened, read, deleted and the session
180: # key returned to the caller.
181: #
182: # Parameters:
183: # $Socket - Socket open on client.
184: # $initcmd - The full text of the init command.
185: #
186: # Returns:
187: # IDEA session key on success.
188: # undef on failure.
189: #
190: sub LocalConnection {
191: my ($Socket, $initcmd) = @_;
192: Debug("Attempting local connection: $initcmd client: $clientip");
193: if($clientip ne "127.0.0.1") {
194: &logthis('<font color="red"> LocalConnection rejecting non local: '
195: ."$clientip ne 127.0.0.1 </font>");
196: close $Socket;
197: return undef;
198: } else {
199: chomp($initcmd); # Get rid of \n in filename.
200: my ($init, $type, $name) = split(/:/, $initcmd);
201: Debug(" Init command: $init $type $name ");
202:
203: # Require that $init = init, and $type = local: Otherwise
204: # the caller is insane:
205:
206: if(($init ne "init") && ($type ne "local")) {
207: &logthis('<font color = "red"> LocalConnection: caller is insane! '
208: ."init = $init, and type = $type </font>");
209: close($Socket);;
210: return undef;
211:
212: }
213: # Now get the key filename:
214:
215: my $IDEAKey = lonlocal::ReadKeyFile($name);
216: return $IDEAKey;
217: }
218: }
219: #------------------------------------------------------------------------------
220: #
221: # SSLConnection
222: # Completes the formation of an ssh authenticated connection. The
223: # socket is promoted to an ssl socket. If this promotion and the associated
224: # certificate exchange are successful, the IDEA key is generated and sent
225: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
226: # the caller after the SSL tunnel is torn down.
227: #
228: # Parameters:
229: # Name Type Purpose
230: # $Socket IO::Socket::INET Plaintext socket.
231: #
232: # Returns:
233: # IDEA key on success.
234: # undef on failure.
235: #
236: sub SSLConnection {
237: my $Socket = shift;
238:
239: Debug("SSLConnection: ");
240: my $KeyFile = lonssl::KeyFile();
241: if(!$KeyFile) {
242: my $err = lonssl::LastError();
243: &logthis("<font color=\"red\"> CRITICAL"
244: ."Can't get key file $err </font>");
245: return undef;
246: }
247: my ($CACertificate,
248: $Certificate) = lonssl::CertificateFile();
249:
250:
251: # If any of the key, certificate or certificate authority
252: # certificate filenames are not defined, this can't work.
253:
254: if((!$Certificate) || (!$CACertificate)) {
255: my $err = lonssl::LastError();
256: &logthis("<font color=\"red\"> CRITICAL"
257: ."Can't get certificates: $err </font>");
258:
259: return undef;
260: }
261: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
262:
263: # Indicate to our peer that we can procede with
264: # a transition to ssl authentication:
265:
266: print $Socket "ok:ssl\n";
267:
268: Debug("Approving promotion -> ssl");
269: # And do so:
270:
271: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
272: $CACertificate,
273: $Certificate,
274: $KeyFile);
275: if(! ($SSLSocket) ) { # SSL socket promotion failed.
276: my $err = lonssl::LastError();
277: &logthis("<font color=\"red\"> CRITICAL "
278: ."SSL Socket promotion failed: $err </font>");
279: return undef;
280: }
281: Debug("SSL Promotion successful");
282:
283: #
284: # The only thing we'll use the socket for is to send the IDEA key
285: # to the peer:
286:
287: my $Key = lonlocal::CreateCipherKey();
288: print $SSLSocket "$Key\n";
289:
290: lonssl::Close($SSLSocket);
291:
292: Debug("Key exchange complete: $Key");
293:
294: return $Key;
295: }
296: #
297: # InsecureConnection:
298: # If insecure connections are allowd,
299: # exchange a challenge with the client to 'validate' the
300: # client (not really, but that's the protocol):
301: # We produce a challenge string that's sent to the client.
302: # The client must then echo the challenge verbatim to us.
303: #
304: # Parameter:
305: # Socket - Socket open on the client.
306: # Returns:
307: # 1 - success.
308: # 0 - failure (e.g.mismatch or insecure not allowed).
309: #
310: sub InsecureConnection {
311: my $Socket = shift;
312:
313: # Don't even start if insecure connections are not allowed.
314:
315: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
316: return 0;
317: }
318:
319: # Fabricate a challenge string and send it..
320:
321: my $challenge = "$$".time; # pid + time.
322: print $Socket "$challenge\n";
323: &status("Waiting for challenge reply");
324:
325: my $answer = <$Socket>;
326: $answer =~s/\W//g;
327: if($challenge eq $answer) {
328: return 1;
329: } else {
330: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
331: &status("No challenge reqply");
332: return 0;
333: }
334:
335:
336: }
337: #
338: # Safely execute a command (as long as it's not a shel command and doesn
339: # not require/rely on shell escapes. The function operates by doing a
340: # a pipe based fork and capturing stdout and stderr from the pipe.
341: #
342: # Formal Parameters:
343: # $line - A line of text to be executed as a command.
344: # Returns:
345: # The output from that command. If the output is multiline the caller
346: # must know how to split up the output.
347: #
348: #
349: sub execute_command {
350: my ($line) = @_;
351: my @words = split(/\s/, $line); # Bust the command up into words.
352: my $output = "";
353:
354: my $pid = open(CHILD, "-|");
355:
356: if($pid) { # Parent process
357: Debug("In parent process for execute_command");
358: my @data = <CHILD>; # Read the child's outupt...
359: close CHILD;
360: foreach my $output_line (@data) {
361: Debug("Adding $output_line");
362: $output .= $output_line; # Presumably has a \n on it.
363: }
364:
365: } else { # Child process
366: close (STDERR);
367: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
368: exec(@words); # won't return.
369: }
370: return $output;
371: }
372:
373:
374: # GetCertificate: Given a transaction that requires a certificate,
375: # this function will extract the certificate from the transaction
376: # request. Note that at this point, the only concept of a certificate
377: # is the hostname to which we are connected.
378: #
379: # Parameter:
380: # request - The request sent by our client (this parameterization may
381: # need to change when we really use a certificate granting
382: # authority.
383: #
384: sub GetCertificate {
385: my $request = shift;
386:
387: return $clientip;
388: }
389:
390: #
391: # Return true if client is a manager.
392: #
393: sub isManager {
394: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
395: }
396: #
397: # Return tru if client can do client functions
398: #
399: sub isClient {
400: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
401: }
402:
403:
404: #
405: # ReadManagerTable: Reads in the current manager table. For now this is
406: # done on each manager authentication because:
407: # - These authentications are not frequent
408: # - This allows dynamic changes to the manager table
409: # without the need to signal to the lond.
410: #
411: sub ReadManagerTable {
412:
413: &Debug("Reading manager table");
414: # Clean out the old table first..
415:
416: foreach my $key (keys %managers) {
417: delete $managers{$key};
418: }
419:
420: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
421: if (!open (MANAGERS, $tablename)) {
422: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
423: return;
424: }
425: while(my $host = <MANAGERS>) {
426: chomp($host);
427: if ($host =~ "^#") { # Comment line.
428: next;
429: }
430: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
431: # The entry is of the form:
432: # cluname:hostname
433: # cluname - A 'cluster hostname' is needed in order to negotiate
434: # the host key.
435: # hostname- The dns name of the host.
436: #
437: my($cluname, $dnsname) = split(/:/, $host);
438:
439: my $ip = gethostbyname($dnsname);
440: if(defined($ip)) { # bad names don't deserve entry.
441: my $hostip = inet_ntoa($ip);
442: $managers{$hostip} = $cluname;
443: logthis('<font color="green"> registering manager '.
444: "$dnsname as $cluname with $hostip </font>\n");
445: }
446: } else {
447: logthis('<font color="green"> existing host'." $host</font>\n");
448: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if clumemeber
449: }
450: }
451: }
452:
453: #
454: # ValidManager: Determines if a given certificate represents a valid manager.
455: # in this primitive implementation, the 'certificate' is
456: # just the connecting loncapa client name. This is checked
457: # against a valid client list in the configuration.
458: #
459: #
460: sub ValidManager {
461: my $certificate = shift;
462:
463: return isManager;
464: }
465: #
466: # CopyFile: Called as part of the process of installing a
467: # new configuration file. This function copies an existing
468: # file to a backup file.
469: # Parameters:
470: # oldfile - Name of the file to backup.
471: # newfile - Name of the backup file.
472: # Return:
473: # 0 - Failure (errno has failure reason).
474: # 1 - Success.
475: #
476: sub CopyFile {
477:
478: my ($oldfile, $newfile) = @_;
479:
480: if (! copy($oldfile,$newfile)) {
481: return 0;
482: }
483: chmod(0660, $newfile);
484: return 1;
485: }
486: #
487: # Host files are passed out with externally visible host IPs.
488: # If, for example, we are behind a fire-wall or NAT host, our
489: # internally visible IP may be different than the externally
490: # visible IP. Therefore, we always adjust the contents of the
491: # host file so that the entry for ME is the IP that we believe
492: # we have. At present, this is defined as the entry that
493: # DNS has for us. If by some chance we are not able to get a
494: # DNS translation for us, then we assume that the host.tab file
495: # is correct.
496: # BUGBUGBUG - in the future, we really should see if we can
497: # easily query the interface(s) instead.
498: # Parameter(s):
499: # contents - The contents of the host.tab to check.
500: # Returns:
501: # newcontents - The adjusted contents.
502: #
503: #
504: sub AdjustHostContents {
505: my $contents = shift;
506: my $adjusted;
507: my $me = $perlvar{'lonHostID'};
508:
509: foreach my $line (split(/\n/,$contents)) {
510: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
511: chomp($line);
512: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
513: if ($id eq $me) {
514: my $ip = gethostbyname($name);
515: my $ipnew = inet_ntoa($ip);
516: $ip = $ipnew;
517: # Reconstruct the host line and append to adjusted:
518:
519: my $newline = "$id:$domain:$role:$name:$ip";
520: if($maxcon ne "") { # Not all hosts have loncnew tuning params
521: $newline .= ":$maxcon:$idleto:$mincon";
522: }
523: $adjusted .= $newline."\n";
524:
525: } else { # Not me, pass unmodified.
526: $adjusted .= $line."\n";
527: }
528: } else { # Blank or comment never re-written.
529: $adjusted .= $line."\n"; # Pass blanks and comments as is.
530: }
531: }
532: return $adjusted;
533: }
534: #
535: # InstallFile: Called to install an administrative file:
536: # - The file is created int a temp directory called <name>.tmp
537: # - lcinstall file is called to install the file.
538: # since the web app has no direct write access to the table directory
539: #
540: # Parameters:
541: # Name of the file
542: # File Contents.
543: # Return:
544: # nonzero - success.
545: # 0 - failure and $! has an errno.
546: # Assumptions:
547: # File installtion is a relatively infrequent
548: #
549: sub InstallFile {
550:
551: my ($Filename, $Contents) = @_;
552: # my $TempFile = $Filename.".tmp";
553: my $exedir = $perlvar{'lonDaemons'};
554: my $tmpdir = $exedir.'/tmp/';
555: my $TempFile = $tmpdir."TempTableFile.tmp";
556:
557: # Open the file for write:
558:
559: my $fh = IO::File->new("> $TempFile"); # Write to temp.
560: if(!(defined $fh)) {
561: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
562: return 0;
563: }
564: # write the contents of the file:
565:
566: print $fh ($Contents);
567: $fh->close; # In case we ever have a filesystem w. locking
568:
569: chmod(0664, $TempFile); # Everyone can write it.
570:
571: # Use lcinstall file to put the file in the table directory...
572:
573: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
574: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
575: close $pf;
576: my $err = $?;
577: &Debug("Status is $err");
578: if ($err != 0) {
579: my $msg = $err;
580: if ($err < @installerrors) {
581: $msg = $installerrors[$err];
582: }
583: &logthis("Install failed for table file $Filename : $msg");
584: return 0;
585: }
586:
587: # Remove the temp file:
588:
589: unlink($TempFile);
590:
591: return 1;
592: }
593:
594:
595: #
596: # ConfigFileFromSelector: converts a configuration file selector
597: # into a configuration file pathname.
598: # It's probably no longer necessary to preserve
599: # special handling of hosts or domain as those
600: # files have been superceded by dns_hosts, dns_domain.
601: # The default action is just to prepend the directory
602: # and append .tab
603: #
604: #
605: # Parameters:
606: # selector - Configuration file selector.
607: # Returns:
608: # Full path to the file or undef if the selector is invalid.
609: #
610: sub ConfigFileFromSelector {
611: my $selector = shift;
612: my $tablefile;
613:
614: my $tabledir = $perlvar{'lonTabDir'}.'/';
615: if ($selector eq "hosts") {
616: $tablefile = $tabledir."hosts.tab";
617: } elsif ($selector eq "domain") {
618: $tablefile = $tabledir."domain.tab";
619: } else {
620: $tablefile = $tabledir.$selector.'.tab';
621: }
622: return $tablefile;
623:
624: }
625: #
626: # PushFile: Called to do an administrative push of a file.
627: # - Ensure the file being pushed is one we support.
628: # - Backup the old file to <filename.saved>
629: # - Separate the contents of the new file out from the
630: # rest of the request.
631: # - Write the new file.
632: # Parameter:
633: # Request - The entire user request. This consists of a : separated
634: # string pushfile:tablename:contents.
635: # NOTE: The contents may have :'s in it as well making things a bit
636: # more interesting... but not much.
637: # Returns:
638: # String to send to client ("ok" or "refused" if bad file).
639: #
640: sub PushFile {
641: my $request = shift;
642: my ($command, $filename, $contents) = split(":", $request, 3);
643: &Debug("PushFile");
644:
645: # At this point in time, pushes for only the following tables are
646: # supported:
647: # hosts.tab ($filename eq host).
648: # domain.tab ($filename eq domain).
649: # Construct the destination filename or reject the request.
650: #
651: # lonManage is supposed to ensure this, however this session could be
652: # part of some elaborate spoof that managed somehow to authenticate.
653: #
654:
655:
656: my $tablefile = ConfigFileFromSelector($filename);
657: if(! (defined $tablefile)) {
658: return "refused";
659: }
660:
661: # If the file being pushed is the host file, we adjust the entry for ourself so that the
662: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
663: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
664: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
665: # that possibilty.
666:
667: if($filename eq "host") {
668: $contents = AdjustHostContents($contents);
669: }
670:
671: # Install the new file:
672:
673: &logthis("Installing new $tablefile contents:\n$contents");
674: if(!InstallFile($tablefile, $contents)) {
675: &logthis('<font color="red"> Pushfile: unable to install '
676: .$tablefile." $! </font>");
677: return "error:$!";
678: } else {
679: &logthis('<font color="green"> Installed new '.$tablefile
680: ."</font>");
681:
682: }
683:
684:
685: # Indicate success:
686:
687: return "ok";
688:
689: }
690:
691: #
692: # Called to re-init either lonc or lond.
693: #
694: # Parameters:
695: # request - The full request by the client. This is of the form
696: # reinit:<process>
697: # where <process> is allowed to be either of
698: # lonc or lond
699: #
700: # Returns:
701: # The string to be sent back to the client either:
702: # ok - Everything worked just fine.
703: # error:why - There was a failure and why describes the reason.
704: #
705: #
706: sub ReinitProcess {
707: my $request = shift;
708:
709:
710: # separate the request (reinit) from the process identifier and
711: # validate it producing the name of the .pid file for the process.
712: #
713: #
714: my ($junk, $process) = split(":", $request);
715: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
716: if($process eq 'lonc') {
717: $processpidfile = $processpidfile."lonc.pid";
718: if (!open(PIDFILE, "< $processpidfile")) {
719: return "error:Open failed for $processpidfile";
720: }
721: my $loncpid = <PIDFILE>;
722: close(PIDFILE);
723: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
724: ."</font>");
725: kill("USR2", $loncpid);
726: } elsif ($process eq 'lond') {
727: logthis('<font color="red"> Reinitializing self (lond) </font>');
728: &UpdateHosts; # Lond is us!!
729: } else {
730: &logthis('<font color="yellow" Invalid reinit request for '.$process
731: ."</font>");
732: return "error:Invalid process identifier $process";
733: }
734: return 'ok';
735: }
736: # Validate a line in a configuration file edit script:
737: # Validation includes:
738: # - Ensuring the command is valid.
739: # - Ensuring the command has sufficient parameters
740: # Parameters:
741: # scriptline - A line to validate (\n has been stripped for what it's worth).
742: #
743: # Return:
744: # 0 - Invalid scriptline.
745: # 1 - Valid scriptline
746: # NOTE:
747: # Only the command syntax is checked, not the executability of the
748: # command.
749: #
750: sub isValidEditCommand {
751: my $scriptline = shift;
752:
753: # Line elements are pipe separated:
754:
755: my ($command, $key, $newline) = split(/\|/, $scriptline);
756: &logthis('<font color="green"> isValideditCommand checking: '.
757: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
758:
759: if ($command eq "delete") {
760: #
761: # key with no newline.
762: #
763: if( ($key eq "") || ($newline ne "")) {
764: return 0; # Must have key but no newline.
765: } else {
766: return 1; # Valid syntax.
767: }
768: } elsif ($command eq "replace") {
769: #
770: # key and newline:
771: #
772: if (($key eq "") || ($newline eq "")) {
773: return 0;
774: } else {
775: return 1;
776: }
777: } elsif ($command eq "append") {
778: if (($key ne "") && ($newline eq "")) {
779: return 1;
780: } else {
781: return 0;
782: }
783: } else {
784: return 0; # Invalid command.
785: }
786: return 0; # Should not get here!!!
787: }
788: #
789: # ApplyEdit - Applies an edit command to a line in a configuration
790: # file. It is the caller's responsiblity to validate the
791: # edit line.
792: # Parameters:
793: # $directive - A single edit directive to apply.
794: # Edit directives are of the form:
795: # append|newline - Appends a new line to the file.
796: # replace|key|newline - Replaces the line with key value 'key'
797: # delete|key - Deletes the line with key value 'key'.
798: # $editor - A config file editor object that contains the
799: # file being edited.
800: #
801: sub ApplyEdit {
802:
803: my ($directive, $editor) = @_;
804:
805: # Break the directive down into its command and its parameters
806: # (at most two at this point. The meaning of the parameters, if in fact
807: # they exist depends on the command).
808:
809: my ($command, $p1, $p2) = split(/\|/, $directive);
810:
811: if($command eq "append") {
812: $editor->Append($p1); # p1 - key p2 null.
813: } elsif ($command eq "replace") {
814: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
815: } elsif ($command eq "delete") {
816: $editor->DeleteLine($p1); # p1 - key p2 null.
817: } else { # Should not get here!!!
818: die "Invalid command given to ApplyEdit $command"
819: }
820: }
821: #
822: # AdjustOurHost:
823: # Adjusts a host file stored in a configuration file editor object
824: # for the true IP address of this host. This is necessary for hosts
825: # that live behind a firewall.
826: # Those hosts have a publicly distributed IP of the firewall, but
827: # internally must use their actual IP. We assume that a given
828: # host only has a single IP interface for now.
829: # Formal Parameters:
830: # editor - The configuration file editor to adjust. This
831: # editor is assumed to contain a hosts.tab file.
832: # Strategy:
833: # - Figure out our hostname.
834: # - Lookup the entry for this host.
835: # - Modify the line to contain our IP
836: # - Do a replace for this host.
837: sub AdjustOurHost {
838: my $editor = shift;
839:
840: # figure out who I am.
841:
842: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
843:
844: # Get my host file entry.
845:
846: my $ConfigLine = $editor->Find($myHostName);
847: if(! (defined $ConfigLine)) {
848: die "AdjustOurHost - no entry for me in hosts file $myHostName";
849: }
850: # figure out my IP:
851: # Use the config line to get my hostname.
852: # Use gethostbyname to translate that into an IP address.
853: #
854: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
855: #
856: # Reassemble the config line from the elements in the list.
857: # Note that if the loncnew items were not present before, they will
858: # be now even if they would be empty
859: #
860: my $newConfigLine = $id;
861: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
862: $newConfigLine .= ":".$item;
863: }
864: # Replace the line:
865:
866: $editor->ReplaceLine($id, $newConfigLine);
867:
868: }
869: #
870: # ReplaceConfigFile:
871: # Replaces a configuration file with the contents of a
872: # configuration file editor object.
873: # This is done by:
874: # - Copying the target file to <filename>.old
875: # - Writing the new file to <filename>.tmp
876: # - Moving <filename.tmp> -> <filename>
877: # This laborious process ensures that the system is never without
878: # a configuration file that's at least valid (even if the contents
879: # may be dated).
880: # Parameters:
881: # filename - Name of the file to modify... this is a full path.
882: # editor - Editor containing the file.
883: #
884: sub ReplaceConfigFile {
885:
886: my ($filename, $editor) = @_;
887:
888: CopyFile ($filename, $filename.".old");
889:
890: my $contents = $editor->Get(); # Get the contents of the file.
891:
892: InstallFile($filename, $contents);
893: }
894: #
895: #
896: # Called to edit a configuration table file
897: # Parameters:
898: # request - The entire command/request sent by lonc or lonManage
899: # Return:
900: # The reply to send to the client.
901: #
902: sub EditFile {
903: my $request = shift;
904:
905: # Split the command into it's pieces: edit:filetype:script
906:
907: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
908:
909: # Check the pre-coditions for success:
910:
911: if($cmd != "edit") { # Something is amiss afoot alack.
912: return "error:edit request detected, but request != 'edit'\n";
913: }
914: if( ($filetype ne "hosts") &&
915: ($filetype ne "domain")) {
916: return "error:edit requested with invalid file specifier: $filetype \n";
917: }
918:
919: # Split the edit script and check it's validity.
920:
921: my @scriptlines = split(/\n/, $script); # one line per element.
922: my $linecount = scalar(@scriptlines);
923: for(my $i = 0; $i < $linecount; $i++) {
924: chomp($scriptlines[$i]);
925: if(!isValidEditCommand($scriptlines[$i])) {
926: return "error:edit with bad script line: '$scriptlines[$i]' \n";
927: }
928: }
929:
930: # Execute the edit operation.
931: # - Create a config file editor for the appropriate file and
932: # - execute each command in the script:
933: #
934: my $configfile = ConfigFileFromSelector($filetype);
935: if (!(defined $configfile)) {
936: return "refused\n";
937: }
938: my $editor = ConfigFileEdit->new($configfile);
939:
940: for (my $i = 0; $i < $linecount; $i++) {
941: ApplyEdit($scriptlines[$i], $editor);
942: }
943: # If the file is the host file, ensure that our host is
944: # adjusted to have our ip:
945: #
946: if($filetype eq "host") {
947: AdjustOurHost($editor);
948: }
949: # Finally replace the current file with our file.
950: #
951: ReplaceConfigFile($configfile, $editor);
952:
953: return "ok\n";
954: }
955:
956: # read_profile
957: #
958: # Returns a set of specific entries from a user's profile file.
959: # this is a utility function that is used by both get_profile_entry and
960: # get_profile_entry_encrypted.
961: #
962: # Parameters:
963: # udom - Domain in which the user exists.
964: # uname - User's account name (loncapa account)
965: # namespace - The profile namespace to open.
966: # what - A set of & separated queries.
967: # Returns:
968: # If all ok: - The string that needs to be shipped back to the user.
969: # If failure - A string that starts with error: followed by the failure
970: # reason.. note that this probabyl gets shipped back to the
971: # user as well.
972: #
973: sub read_profile {
974: my ($udom, $uname, $namespace, $what) = @_;
975:
976: my $hashref = &tie_user_hash($udom, $uname, $namespace,
977: &GDBM_READER());
978: if ($hashref) {
979: my @queries=split(/\&/,$what);
980: if ($namespace eq 'roles') {
981: @queries = map { &unescape($_); } @queries;
982: }
983: my $qresult='';
984:
985: for (my $i=0;$i<=$#queries;$i++) {
986: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
987: }
988: $qresult=~s/\&$//; # Remove trailing & from last lookup.
989: if (&untie_user_hash($hashref)) {
990: return $qresult;
991: } else {
992: return "error: ".($!+0)." untie (GDBM) Failed";
993: }
994: } else {
995: if ($!+0 == 2) {
996: return "error:No such file or GDBM reported bad block error";
997: } else {
998: return "error: ".($!+0)." tie (GDBM) Failed";
999: }
1000: }
1001:
1002: }
1003: #--------------------- Request Handlers --------------------------------------------
1004: #
1005: # By convention each request handler registers itself prior to the sub
1006: # declaration:
1007: #
1008:
1009: #++
1010: #
1011: # Handles ping requests.
1012: # Parameters:
1013: # $cmd - the actual keyword that invoked us.
1014: # $tail - the tail of the request that invoked us.
1015: # $replyfd- File descriptor connected to the client
1016: # Implicit Inputs:
1017: # $currenthostid - Global variable that carries the name of the host we are
1018: # known as.
1019: # Returns:
1020: # 1 - Ok to continue processing.
1021: # 0 - Program should exit.
1022: # Side effects:
1023: # Reply information is sent to the client.
1024: sub ping_handler {
1025: my ($cmd, $tail, $client) = @_;
1026: Debug("$cmd $tail $client .. $currenthostid:");
1027:
1028: Reply( $client,\$currenthostid,"$cmd:$tail");
1029:
1030: return 1;
1031: }
1032: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1033:
1034: #++
1035: #
1036: # Handles pong requests. Pong replies with our current host id, and
1037: # the results of a ping sent to us via our lonc.
1038: #
1039: # Parameters:
1040: # $cmd - the actual keyword that invoked us.
1041: # $tail - the tail of the request that invoked us.
1042: # $replyfd- File descriptor connected to the client
1043: # Implicit Inputs:
1044: # $currenthostid - Global variable that carries the name of the host we are
1045: # connected to.
1046: # Returns:
1047: # 1 - Ok to continue processing.
1048: # 0 - Program should exit.
1049: # Side effects:
1050: # Reply information is sent to the client.
1051: sub pong_handler {
1052: my ($cmd, $tail, $replyfd) = @_;
1053:
1054: my $reply=&Apache::lonnet::reply("ping",$clientname);
1055: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1056: return 1;
1057: }
1058: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1059:
1060: #++
1061: # Called to establish an encrypted session key with the remote client.
1062: # Note that with secure lond, in most cases this function is never
1063: # invoked. Instead, the secure session key is established either
1064: # via a local file that's locked down tight and only lives for a short
1065: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1066: # bits from /dev/urandom, rather than the predictable pattern used by
1067: # by this sub. This sub is only used in the old-style insecure
1068: # key negotiation.
1069: # Parameters:
1070: # $cmd - the actual keyword that invoked us.
1071: # $tail - the tail of the request that invoked us.
1072: # $replyfd- File descriptor connected to the client
1073: # Implicit Inputs:
1074: # $currenthostid - Global variable that carries the name of the host
1075: # known as.
1076: # $clientname - Global variable that carries the name of the host we're connected to.
1077: # Returns:
1078: # 1 - Ok to continue processing.
1079: # 0 - Program should exit.
1080: # Implicit Outputs:
1081: # Reply information is sent to the client.
1082: # $cipher is set with a reference to a new IDEA encryption object.
1083: #
1084: sub establish_key_handler {
1085: my ($cmd, $tail, $replyfd) = @_;
1086:
1087: my $buildkey=time.$$.int(rand 100000);
1088: $buildkey=~tr/1-6/A-F/;
1089: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1090: my $key=$currenthostid.$clientname;
1091: $key=~tr/a-z/A-Z/;
1092: $key=~tr/G-P/0-9/;
1093: $key=~tr/Q-Z/0-9/;
1094: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1095: $key=substr($key,0,32);
1096: my $cipherkey=pack("H32",$key);
1097: $cipher=new IDEA $cipherkey;
1098: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1099:
1100: return 1;
1101:
1102: }
1103: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1104:
1105: # Handler for the load command. Returns the current system load average
1106: # to the requestor.
1107: #
1108: # Parameters:
1109: # $cmd - the actual keyword that invoked us.
1110: # $tail - the tail of the request that invoked us.
1111: # $replyfd- File descriptor connected to the client
1112: # Implicit Inputs:
1113: # $currenthostid - Global variable that carries the name of the host
1114: # known as.
1115: # $clientname - Global variable that carries the name of the host we're connected to.
1116: # Returns:
1117: # 1 - Ok to continue processing.
1118: # 0 - Program should exit.
1119: # Side effects:
1120: # Reply information is sent to the client.
1121: sub load_handler {
1122: my ($cmd, $tail, $replyfd) = @_;
1123:
1124: # Get the load average from /proc/loadavg and calculate it as a percentage of
1125: # the allowed load limit as set by the perl global variable lonLoadLim
1126:
1127: my $loadavg;
1128: my $loadfile=IO::File->new('/proc/loadavg');
1129:
1130: $loadavg=<$loadfile>;
1131: $loadavg =~ s/\s.*//g; # Extract the first field only.
1132:
1133: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1134:
1135: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1136:
1137: return 1;
1138: }
1139: ®ister_handler("load", \&load_handler, 0, 1, 0);
1140:
1141: #
1142: # Process the userload request. This sub returns to the client the current
1143: # user load average. It can be invoked either by clients or managers.
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: # Implicit Inputs:
1150: # $currenthostid - Global variable that carries the name of the host
1151: # known as.
1152: # $clientname - Global variable that carries the name of the host we're connected to.
1153: # Returns:
1154: # 1 - Ok to continue processing.
1155: # 0 - Program should exit
1156: # Implicit inputs:
1157: # whatever the userload() function requires.
1158: # Implicit outputs:
1159: # the reply is written to the client.
1160: #
1161: sub user_load_handler {
1162: my ($cmd, $tail, $replyfd) = @_;
1163:
1164: my $userloadpercent=&Apache::lonnet::userload();
1165: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1166:
1167: return 1;
1168: }
1169: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1170:
1171: # Process a request for the authorization type of a user:
1172: # (userauth).
1173: #
1174: # Parameters:
1175: # $cmd - the actual keyword that invoked us.
1176: # $tail - the tail of the request that invoked us.
1177: # $replyfd- File descriptor connected to the client
1178: # Returns:
1179: # 1 - Ok to continue processing.
1180: # 0 - Program should exit
1181: # Implicit outputs:
1182: # The user authorization type is written to the client.
1183: #
1184: sub user_authorization_type {
1185: my ($cmd, $tail, $replyfd) = @_;
1186:
1187: my $userinput = "$cmd:$tail";
1188:
1189: # Pull the domain and username out of the command tail.
1190: # and call get_auth_type to determine the authentication type.
1191:
1192: my ($udom,$uname)=split(/:/,$tail);
1193: my $result = &get_auth_type($udom, $uname);
1194: if($result eq "nouser") {
1195: &Failure( $replyfd, "unknown_user\n", $userinput);
1196: } else {
1197: #
1198: # We only want to pass the second field from get_auth_type
1199: # for ^krb.. otherwise we'll be handing out the encrypted
1200: # password for internals e.g.
1201: #
1202: my ($type,$otherinfo) = split(/:/,$result);
1203: if($type =~ /^krb/) {
1204: $type = $result;
1205: } else {
1206: $type .= ':';
1207: }
1208: &Reply( $replyfd, \$type, $userinput);
1209: }
1210:
1211: return 1;
1212: }
1213: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1214:
1215: # Process a request by a manager to push a hosts or domain table
1216: # to us. We pick apart the command and pass it on to the subs
1217: # that already exist to do this.
1218: #
1219: # Parameters:
1220: # $cmd - the actual keyword that invoked us.
1221: # $tail - the tail of the request that invoked us.
1222: # $client - File descriptor connected to the client
1223: # Returns:
1224: # 1 - Ok to continue processing.
1225: # 0 - Program should exit
1226: # Implicit Output:
1227: # a reply is written to the client.
1228: sub push_file_handler {
1229: my ($cmd, $tail, $client) = @_;
1230: &Debug("In push file handler");
1231: my $userinput = "$cmd:$tail";
1232:
1233: # At this time we only know that the IP of our partner is a valid manager
1234: # the code below is a hook to do further authentication (e.g. to resolve
1235: # spoofing).
1236:
1237: my $cert = &GetCertificate($userinput);
1238: if(&ValidManager($cert)) {
1239: &Debug("Valid manager: $client");
1240:
1241: # Now presumably we have the bona fides of both the peer host and the
1242: # process making the request.
1243:
1244: my $reply = &PushFile($userinput);
1245: &Reply($client, \$reply, $userinput);
1246:
1247: } else {
1248: &logthis("push_file_handler $client is not valid");
1249: &Failure( $client, "refused\n", $userinput);
1250: }
1251: return 1;
1252: }
1253: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1254:
1255: # The du_handler routine should be considered obsolete and is retained
1256: # for communication with legacy servers. Please see the du2_handler.
1257: #
1258: # du - list the disk usage of a directory recursively.
1259: #
1260: # note: stolen code from the ls file handler
1261: # under construction by Rick Banghart
1262: # .
1263: # Parameters:
1264: # $cmd - The command that dispatched us (du).
1265: # $ududir - The directory path to list... I'm not sure what this
1266: # is relative as things like ls:. return e.g.
1267: # no_such_dir.
1268: # $client - Socket open on the client.
1269: # Returns:
1270: # 1 - indicating that the daemon should not disconnect.
1271: # Side Effects:
1272: # The reply is written to $client.
1273: #
1274: sub du_handler {
1275: my ($cmd, $ududir, $client) = @_;
1276: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1277: my $userinput = "$cmd:$ududir";
1278:
1279: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1280: &Failure($client,"refused\n","$cmd:$ududir");
1281: return 1;
1282: }
1283: # Since $ududir could have some nasties in it,
1284: # we will require that ududir is a valid
1285: # directory. Just in case someone tries to
1286: # slip us a line like .;(cd /home/httpd rm -rf*)
1287: # etc.
1288: #
1289: if (-d $ududir) {
1290: my $total_size=0;
1291: my $code=sub {
1292: if ($_=~/\.\d+\./) { return;}
1293: if ($_=~/\.meta$/) { return;}
1294: if (-d $_) { return;}
1295: $total_size+=(stat($_))[7];
1296: };
1297: chdir($ududir);
1298: find($code,$ududir);
1299: $total_size=int($total_size/1024);
1300: &Reply($client,\$total_size,"$cmd:$ududir");
1301: } else {
1302: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1303: }
1304: return 1;
1305: }
1306: ®ister_handler("du", \&du_handler, 0, 1, 0);
1307:
1308: # Please also see the du_handler, which is obsoleted by du2.
1309: # du2_handler differs from du_handler in that required path to directory
1310: # provided by &propath() is prepended in the handler instead of on the
1311: # client side.
1312: #
1313: # du2 - list the disk usage of a directory recursively.
1314: #
1315: # Parameters:
1316: # $cmd - The command that dispatched us (du).
1317: # $tail - The tail of the request that invoked us.
1318: # $tail is a : separated list of the following:
1319: # - $ududir - directory path to list (before prepending)
1320: # - $getpropath = 1 if &propath() should prepend
1321: # - $uname - username to use for &propath or user dir
1322: # - $udom - domain to use for &propath or user dir
1323: # All are escaped.
1324: # $client - Socket open on the client.
1325: # Returns:
1326: # 1 - indicating that the daemon should not disconnect.
1327: # Side Effects:
1328: # The reply is written to $client.
1329: #
1330:
1331: sub du2_handler {
1332: my ($cmd, $tail, $client) = @_;
1333: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1334: my $userinput = "$cmd:$tail";
1335: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1336: &Failure($client,"refused\n","$cmd:$tail");
1337: return 1;
1338: }
1339: if ($getpropath) {
1340: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1341: $ududir = &propath($udom,$uname).'/'.$ududir;
1342: } else {
1343: &Failure($client,"refused\n","$cmd:$tail");
1344: return 1;
1345: }
1346: }
1347: # Since $ududir could have some nasties in it,
1348: # we will require that ududir is a valid
1349: # directory. Just in case someone tries to
1350: # slip us a line like .;(cd /home/httpd rm -rf*)
1351: # etc.
1352: #
1353: if (-d $ududir) {
1354: my $total_size=0;
1355: my $code=sub {
1356: if ($_=~/\.\d+\./) { return;}
1357: if ($_=~/\.meta$/) { return;}
1358: if (-d $_) { return;}
1359: $total_size+=(stat($_))[7];
1360: };
1361: chdir($ududir);
1362: find($code,$ududir);
1363: $total_size=int($total_size/1024);
1364: &Reply($client,\$total_size,"$cmd:$ududir");
1365: } else {
1366: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1367: }
1368: return 1;
1369: }
1370: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1371:
1372: #
1373: # The ls_handler routine should be considered obsolete and is retained
1374: # for communication with legacy servers. Please see the ls3_handler.
1375: #
1376: # ls - list the contents of a directory. For each file in the
1377: # selected directory the filename followed by the full output of
1378: # the stat function is returned. The returned info for each
1379: # file are separated by ':'. The stat fields are separated by &'s.
1380: # Parameters:
1381: # $cmd - The command that dispatched us (ls).
1382: # $ulsdir - The directory path to list... I'm not sure what this
1383: # is relative as things like ls:. return e.g.
1384: # no_such_dir.
1385: # $client - Socket open on the client.
1386: # Returns:
1387: # 1 - indicating that the daemon should not disconnect.
1388: # Side Effects:
1389: # The reply is written to $client.
1390: #
1391: sub ls_handler {
1392: # obsoleted by ls2_handler
1393: my ($cmd, $ulsdir, $client) = @_;
1394:
1395: my $userinput = "$cmd:$ulsdir";
1396:
1397: my $obs;
1398: my $rights;
1399: my $ulsout='';
1400: my $ulsfn;
1401: if (-e $ulsdir) {
1402: if(-d $ulsdir) {
1403: if (opendir(LSDIR,$ulsdir)) {
1404: while ($ulsfn=readdir(LSDIR)) {
1405: undef($obs);
1406: undef($rights);
1407: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1408: #We do some obsolete checking here
1409: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1410: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1411: my @obsolete=<FILE>;
1412: foreach my $obsolete (@obsolete) {
1413: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1414: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1415: }
1416: }
1417: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1418: if($obs eq '1') { $ulsout.="&1"; }
1419: else { $ulsout.="&0"; }
1420: if($rights eq '1') { $ulsout.="&1:"; }
1421: else { $ulsout.="&0:"; }
1422: }
1423: closedir(LSDIR);
1424: }
1425: } else {
1426: my @ulsstats=stat($ulsdir);
1427: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1428: }
1429: } else {
1430: $ulsout='no_such_dir';
1431: }
1432: if ($ulsout eq '') { $ulsout='empty'; }
1433: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1434:
1435: return 1;
1436:
1437: }
1438: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1439:
1440: # The ls2_handler routine should be considered obsolete and is retained
1441: # for communication with legacy servers. Please see the ls3_handler.
1442: # Please also see the ls_handler, which was itself obsoleted by ls2.
1443: # ls2_handler differs from ls_handler in that it escapes its return
1444: # values before concatenating them together with ':'s.
1445: #
1446: # ls2 - list the contents of a directory. For each file in the
1447: # selected directory the filename followed by the full output of
1448: # the stat function is returned. The returned info for each
1449: # file are separated by ':'. The stat fields are separated by &'s.
1450: # Parameters:
1451: # $cmd - The command that dispatched us (ls).
1452: # $ulsdir - The directory path to list... I'm not sure what this
1453: # is relative as things like ls:. return e.g.
1454: # no_such_dir.
1455: # $client - Socket open on the client.
1456: # Returns:
1457: # 1 - indicating that the daemon should not disconnect.
1458: # Side Effects:
1459: # The reply is written to $client.
1460: #
1461: sub ls2_handler {
1462: my ($cmd, $ulsdir, $client) = @_;
1463:
1464: my $userinput = "$cmd:$ulsdir";
1465:
1466: my $obs;
1467: my $rights;
1468: my $ulsout='';
1469: my $ulsfn;
1470: if (-e $ulsdir) {
1471: if(-d $ulsdir) {
1472: if (opendir(LSDIR,$ulsdir)) {
1473: while ($ulsfn=readdir(LSDIR)) {
1474: undef($obs);
1475: undef($rights);
1476: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1477: #We do some obsolete checking here
1478: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1479: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1480: my @obsolete=<FILE>;
1481: foreach my $obsolete (@obsolete) {
1482: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1483: if($obsolete =~ m|(<copyright>)(default)|) {
1484: $rights = 1;
1485: }
1486: }
1487: }
1488: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1489: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1490: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1491: $ulsout.= &escape($tmp).':';
1492: }
1493: closedir(LSDIR);
1494: }
1495: } else {
1496: my @ulsstats=stat($ulsdir);
1497: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1498: }
1499: } else {
1500: $ulsout='no_such_dir';
1501: }
1502: if ($ulsout eq '') { $ulsout='empty'; }
1503: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1504: return 1;
1505: }
1506: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1507: #
1508: # ls3 - list the contents of a directory. For each file in the
1509: # selected directory the filename followed by the full output of
1510: # the stat function is returned. The returned info for each
1511: # file are separated by ':'. The stat fields are separated by &'s.
1512: # Parameters:
1513: # $cmd - The command that dispatched us (ls).
1514: # $tail - The tail of the request that invoked us.
1515: # $tail is a : separated list of the following:
1516: # - $ulsdir - directory path to list (before prepending)
1517: # - $getpropath = 1 if &propath() should prepend
1518: # - $getuserdir = 1 if path to user dir in lonUsers should
1519: # prepend
1520: # - $alternate_root - path to prepend
1521: # - $uname - username to use for &propath or user dir
1522: # - $udom - domain to use for &propath or user dir
1523: # All of these except $getpropath and &getuserdir are escaped.
1524: # no_such_dir.
1525: # $client - Socket open on the client.
1526: # Returns:
1527: # 1 - indicating that the daemon should not disconnect.
1528: # Side Effects:
1529: # The reply is written to $client.
1530: #
1531:
1532: sub ls3_handler {
1533: my ($cmd, $tail, $client) = @_;
1534: my $userinput = "$cmd:$tail";
1535: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1536: split(/:/,$tail);
1537: if (defined($ulsdir)) {
1538: $ulsdir = &unescape($ulsdir);
1539: }
1540: if (defined($alternate_root)) {
1541: $alternate_root = &unescape($alternate_root);
1542: }
1543: if (defined($uname)) {
1544: $uname = &unescape($uname);
1545: }
1546: if (defined($udom)) {
1547: $udom = &unescape($udom);
1548: }
1549:
1550: my $dir_root = $perlvar{'lonDocRoot'};
1551: if ($getpropath) {
1552: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1553: $dir_root = &propath($udom,$uname);
1554: $dir_root =~ s/\/$//;
1555: } else {
1556: &Failure($client,"refused\n","$cmd:$tail");
1557: return 1;
1558: }
1559: } elsif ($getuserdir) {
1560: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1561: my $subdir=$uname.'__';
1562: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1563: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1564: ."/$udom/$subdir/$uname";
1565: } else {
1566: &Failure($client,"refused\n","$cmd:$tail");
1567: return 1;
1568: }
1569: } elsif ($alternate_root ne '') {
1570: $dir_root = $alternate_root;
1571: }
1572: if (($dir_root ne '') && ($dir_root ne '/')) {
1573: if ($ulsdir =~ /^\//) {
1574: $ulsdir = $dir_root.$ulsdir;
1575: } else {
1576: $ulsdir = $dir_root.'/'.$ulsdir;
1577: }
1578: }
1579: my $obs;
1580: my $rights;
1581: my $ulsout='';
1582: my $ulsfn;
1583: if (-e $ulsdir) {
1584: if(-d $ulsdir) {
1585: if (opendir(LSDIR,$ulsdir)) {
1586: while ($ulsfn=readdir(LSDIR)) {
1587: undef($obs);
1588: undef($rights);
1589: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1590: #We do some obsolete checking here
1591: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1592: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1593: my @obsolete=<FILE>;
1594: foreach my $obsolete (@obsolete) {
1595: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1596: if($obsolete =~ m|(<copyright>)(default)|) {
1597: $rights = 1;
1598: }
1599: }
1600: }
1601: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1602: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1603: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1604: $ulsout.= &escape($tmp).':';
1605: }
1606: closedir(LSDIR);
1607: }
1608: } else {
1609: my @ulsstats=stat($ulsdir);
1610: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1611: }
1612: } else {
1613: $ulsout='no_such_dir';
1614: }
1615: if ($ulsout eq '') { $ulsout='empty'; }
1616: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1617: return 1;
1618: }
1619: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1620:
1621: sub server_timezone_handler {
1622: my ($cmd,$tail,$client) = @_;
1623: my $userinput = "$cmd:$tail";
1624: my $timezone;
1625: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1626: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1627: if (-e $clockfile) {
1628: if (open(my $fh,"<$clockfile")) {
1629: while (<$fh>) {
1630: next if (/^[\#\s]/);
1631: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1632: $timezone = $1;
1633: last;
1634: }
1635: }
1636: close($fh);
1637: }
1638: } elsif (-e $tzfile) {
1639: if (open(my $fh,"<$tzfile")) {
1640: $timezone = <$fh>;
1641: close($fh);
1642: chomp($timezone);
1643: if ($timezone =~ m{^Etc/(\w+)$}) {
1644: $timezone = $1;
1645: }
1646: }
1647: }
1648: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1649: return 1;
1650: }
1651: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1652:
1653: sub server_loncaparev_handler {
1654: my ($cmd,$tail,$client) = @_;
1655: my $userinput = "$cmd:$tail";
1656: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1657: return 1;
1658: }
1659: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1660:
1661: sub server_homeID_handler {
1662: my ($cmd,$tail,$client) = @_;
1663: my $userinput = "$cmd:$tail";
1664: &Reply($client,\$perlvar{'lonHostID'},$userinput);
1665: return 1;
1666: }
1667: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
1668:
1669: # Process a reinit request. Reinit requests that either
1670: # lonc or lond be reinitialized so that an updated
1671: # host.tab or domain.tab can be processed.
1672: #
1673: # Parameters:
1674: # $cmd - the actual keyword that invoked us.
1675: # $tail - the tail of the request that invoked us.
1676: # $client - File descriptor connected to the client
1677: # Returns:
1678: # 1 - Ok to continue processing.
1679: # 0 - Program should exit
1680: # Implicit output:
1681: # a reply is sent to the client.
1682: #
1683: sub reinit_process_handler {
1684: my ($cmd, $tail, $client) = @_;
1685:
1686: my $userinput = "$cmd:$tail";
1687:
1688: my $cert = &GetCertificate($userinput);
1689: if(&ValidManager($cert)) {
1690: chomp($userinput);
1691: my $reply = &ReinitProcess($userinput);
1692: &Reply( $client, \$reply, $userinput);
1693: } else {
1694: &Failure( $client, "refused\n", $userinput);
1695: }
1696: return 1;
1697: }
1698: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1699:
1700: # Process the editing script for a table edit operation.
1701: # the editing operation must be encrypted and requested by
1702: # a manager host.
1703: #
1704: # Parameters:
1705: # $cmd - the actual keyword that invoked us.
1706: # $tail - the tail of the request that invoked us.
1707: # $client - File descriptor connected to the client
1708: # Returns:
1709: # 1 - Ok to continue processing.
1710: # 0 - Program should exit
1711: # Implicit output:
1712: # a reply is sent to the client.
1713: #
1714: sub edit_table_handler {
1715: my ($command, $tail, $client) = @_;
1716:
1717: my $userinput = "$command:$tail";
1718:
1719: my $cert = &GetCertificate($userinput);
1720: if(&ValidManager($cert)) {
1721: my($filetype, $script) = split(/:/, $tail);
1722: if (($filetype eq "hosts") ||
1723: ($filetype eq "domain")) {
1724: if($script ne "") {
1725: &Reply($client, # BUGBUG - EditFile
1726: &EditFile($userinput), # could fail.
1727: $userinput);
1728: } else {
1729: &Failure($client,"refused\n",$userinput);
1730: }
1731: } else {
1732: &Failure($client,"refused\n",$userinput);
1733: }
1734: } else {
1735: &Failure($client,"refused\n",$userinput);
1736: }
1737: return 1;
1738: }
1739: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1740:
1741: #
1742: # Authenticate a user against the LonCAPA authentication
1743: # database. Note that there are several authentication
1744: # possibilities:
1745: # - unix - The user can be authenticated against the unix
1746: # password file.
1747: # - internal - The user can be authenticated against a purely
1748: # internal per user password file.
1749: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1750: # ticket granting authority.
1751: # - user - The person tailoring LonCAPA can supply a user authentication
1752: # mechanism that is per system.
1753: #
1754: # Parameters:
1755: # $cmd - The command that got us here.
1756: # $tail - Tail of the command (remaining parameters).
1757: # $client - File descriptor connected to client.
1758: # Returns
1759: # 0 - Requested to exit, caller should shut down.
1760: # 1 - Continue processing.
1761: # Implicit inputs:
1762: # The authentication systems describe above have their own forms of implicit
1763: # input into the authentication process that are described above.
1764: #
1765: sub authenticate_handler {
1766: my ($cmd, $tail, $client) = @_;
1767:
1768:
1769: # Regenerate the full input line
1770:
1771: my $userinput = $cmd.":".$tail;
1772:
1773: # udom - User's domain.
1774: # uname - Username.
1775: # upass - User's password.
1776: # checkdefauth - Pass to validate_user() to try authentication
1777: # with default auth type(s) if no user account.
1778: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
1779: # to check if session can be hosted.
1780:
1781: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
1782: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
1783: chomp($upass);
1784: $upass=&unescape($upass);
1785:
1786: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1787: if($pwdcorrect) {
1788: my $canhost = 1;
1789: unless ($clientcancheckhost) {
1790: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
1791: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1792: my @intdoms;
1793: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
1794: if (ref($internet_names) eq 'ARRAY') {
1795: @intdoms = @{$internet_names};
1796: }
1797: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1798: my ($remote,$hosted);
1799: my $remotesession = &get_usersession_config($udom,'remotesession');
1800: if (ref($remotesession) eq 'HASH') {
1801: $remote = $remotesession->{'remote'}
1802: }
1803: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
1804: if (ref($hostedsession) eq 'HASH') {
1805: $hosted = $hostedsession->{'hosted'};
1806: }
1807: my $loncaparev = $clientversion;
1808: if ($loncaparev eq '') {
1809: $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
1810: }
1811: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
1812: $loncaparev,
1813: $remote,$hosted);
1814: }
1815: }
1816: if ($canhost) {
1817: &Reply( $client, "authorized\n", $userinput);
1818: } else {
1819: &Reply( $client, "not_allowed_to_host\n", $userinput);
1820: }
1821: #
1822: # Bad credentials: Failed to authorize
1823: #
1824: } else {
1825: &Failure( $client, "non_authorized\n", $userinput);
1826: }
1827:
1828: return 1;
1829: }
1830: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1831:
1832: #
1833: # Change a user's password. Note that this function is complicated by
1834: # the fact that a user may be authenticated in more than one way:
1835: # At present, we are not able to change the password for all types of
1836: # authentication methods. Only for:
1837: # unix - unix password or shadow passoword style authentication.
1838: # local - Locally written authentication mechanism.
1839: # For now, kerb4 and kerb5 password changes are not supported and result
1840: # in an error.
1841: # FUTURE WORK:
1842: # Support kerberos passwd changes?
1843: # Parameters:
1844: # $cmd - The command that got us here.
1845: # $tail - Tail of the command (remaining parameters).
1846: # $client - File descriptor connected to client.
1847: # Returns
1848: # 0 - Requested to exit, caller should shut down.
1849: # 1 - Continue processing.
1850: # Implicit inputs:
1851: # The authentication systems describe above have their own forms of implicit
1852: # input into the authentication process that are described above.
1853: sub change_password_handler {
1854: my ($cmd, $tail, $client) = @_;
1855:
1856: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1857:
1858: #
1859: # udom - user's domain.
1860: # uname - Username.
1861: # upass - Current password.
1862: # npass - New password.
1863: # context - Context in which this was called
1864: # (preferences or reset_by_email).
1865: # lonhost - HostID of server where request originated
1866:
1867: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1868:
1869: $upass=&unescape($upass);
1870: $npass=&unescape($npass);
1871: &Debug("Trying to change password for $uname");
1872:
1873: # First require that the user can be authenticated with their
1874: # old password unless context was 'reset_by_email':
1875:
1876: my ($validated,$failure);
1877: if ($context eq 'reset_by_email') {
1878: if ($lonhost eq '') {
1879: $failure = 'invalid_client';
1880: } else {
1881: $validated = 1;
1882: }
1883: } else {
1884: $validated = &validate_user($udom, $uname, $upass);
1885: }
1886: if($validated) {
1887: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1888:
1889: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1890: if ($howpwd eq 'internal') {
1891: &Debug("internal auth");
1892: my $salt=time;
1893: $salt=substr($salt,6,2);
1894: my $ncpass=crypt($npass,$salt);
1895: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1896: my $msg="Result of password change for $uname: pwchange_success";
1897: if ($lonhost) {
1898: $msg .= " - request originated from: $lonhost";
1899: }
1900: &logthis($msg);
1901: &Reply($client, "ok\n", $userinput);
1902: } else {
1903: &logthis("Unable to open $uname passwd "
1904: ."to change password");
1905: &Failure( $client, "non_authorized\n",$userinput);
1906: }
1907: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1908: my $result = &change_unix_password($uname, $npass);
1909: &logthis("Result of password change for $uname: ".
1910: $result);
1911: &Reply($client, \$result, $userinput);
1912: } else {
1913: # this just means that the current password mode is not
1914: # one we know how to change (e.g the kerberos auth modes or
1915: # locally written auth handler).
1916: #
1917: &Failure( $client, "auth_mode_error\n", $userinput);
1918: }
1919:
1920: } else {
1921: if ($failure eq '') {
1922: $failure = 'non_authorized';
1923: }
1924: &Failure( $client, "$failure\n", $userinput);
1925: }
1926:
1927: return 1;
1928: }
1929: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1930:
1931: #
1932: # Create a new user. User in this case means a lon-capa user.
1933: # The user must either already exist in some authentication realm
1934: # like kerberos or the /etc/passwd. If not, a user completely local to
1935: # this loncapa system is created.
1936: #
1937: # Parameters:
1938: # $cmd - The command that got us here.
1939: # $tail - Tail of the command (remaining parameters).
1940: # $client - File descriptor connected to client.
1941: # Returns
1942: # 0 - Requested to exit, caller should shut down.
1943: # 1 - Continue processing.
1944: # Implicit inputs:
1945: # The authentication systems describe above have their own forms of implicit
1946: # input into the authentication process that are described above.
1947: sub add_user_handler {
1948:
1949: my ($cmd, $tail, $client) = @_;
1950:
1951:
1952: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1953: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1954:
1955: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1956:
1957:
1958: if($udom eq $currentdomainid) { # Reject new users for other domains...
1959:
1960: my $oldumask=umask(0077);
1961: chomp($npass);
1962: $npass=&unescape($npass);
1963: my $passfilename = &password_path($udom, $uname);
1964: &Debug("Password file created will be:".$passfilename);
1965: if (-e $passfilename) {
1966: &Failure( $client, "already_exists\n", $userinput);
1967: } else {
1968: my $fperror='';
1969: if (!&mkpath($passfilename)) {
1970: $fperror="error: ".($!+0)." mkdir failed while attempting "
1971: ."makeuser";
1972: }
1973: unless ($fperror) {
1974: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1975: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
1976: } else {
1977: &Failure($client, \$fperror, $userinput);
1978: }
1979: }
1980: umask($oldumask);
1981: } else {
1982: &Failure($client, "not_right_domain\n",
1983: $userinput); # Even if we are multihomed.
1984:
1985: }
1986: return 1;
1987:
1988: }
1989: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1990:
1991: #
1992: # Change the authentication method of a user. Note that this may
1993: # also implicitly change the user's password if, for example, the user is
1994: # joining an existing authentication realm. Known authentication realms at
1995: # this time are:
1996: # internal - Purely internal password file (only loncapa knows this user)
1997: # local - Institutionally written authentication module.
1998: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1999: # kerb4 - kerberos version 4
2000: # kerb5 - kerberos version 5
2001: #
2002: # Parameters:
2003: # $cmd - The command that got us here.
2004: # $tail - Tail of the command (remaining parameters).
2005: # $client - File descriptor connected to client.
2006: # Returns
2007: # 0 - Requested to exit, caller should shut down.
2008: # 1 - Continue processing.
2009: # Implicit inputs:
2010: # The authentication systems describe above have their own forms of implicit
2011: # input into the authentication process that are described above.
2012: # NOTE:
2013: # This is also used to change the authentication credential values (e.g. passwd).
2014: #
2015: #
2016: sub change_authentication_handler {
2017:
2018: my ($cmd, $tail, $client) = @_;
2019:
2020: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2021:
2022: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2023: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2024: if ($udom ne $currentdomainid) {
2025: &Failure( $client, "not_right_domain\n", $client);
2026: } else {
2027:
2028: chomp($npass);
2029:
2030: $npass=&unescape($npass);
2031: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2032: my $passfilename = &password_path($udom, $uname);
2033: if ($passfilename) { # Not allowed to create a new user!!
2034: # If just changing the unix passwd. need to arrange to run
2035: # passwd since otherwise make_passwd_file will run
2036: # lcuseradd which fails if an account already exists
2037: # (to prevent an unscrupulous LONCAPA admin from stealing
2038: # an existing account by overwriting it as a LonCAPA account).
2039:
2040: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2041: my $result = &change_unix_password($uname, $npass);
2042: &logthis("Result of password change for $uname: ".$result);
2043: if ($result eq "ok") {
2044: &Reply($client, \$result);
2045: } else {
2046: &Failure($client, \$result);
2047: }
2048: } else {
2049: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
2050: #
2051: # If the current auth mode is internal, and the old auth mode was
2052: # unix, or krb*, and the user is an author for this domain,
2053: # re-run manage_permissions for that role in order to be able
2054: # to take ownership of the construction space back to www:www
2055: #
2056:
2057:
2058: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
2059: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
2060: if(&is_author($udom, $uname)) {
2061: &Debug(" Need to manage author permissions...");
2062: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
2063: }
2064: }
2065: &Reply($client, \$result, $userinput);
2066: }
2067:
2068:
2069: } else {
2070: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2071: }
2072: }
2073: return 1;
2074: }
2075: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2076:
2077: #
2078: # Determines if this is the home server for a user. The home server
2079: # for a user will have his/her lon-capa passwd file. Therefore all we need
2080: # to do is determine if this file exists.
2081: #
2082: # Parameters:
2083: # $cmd - The command that got us here.
2084: # $tail - Tail of the command (remaining parameters).
2085: # $client - File descriptor connected to client.
2086: # Returns
2087: # 0 - Requested to exit, caller should shut down.
2088: # 1 - Continue processing.
2089: # Implicit inputs:
2090: # The authentication systems describe above have their own forms of implicit
2091: # input into the authentication process that are described above.
2092: #
2093: sub is_home_handler {
2094: my ($cmd, $tail, $client) = @_;
2095:
2096: my $userinput = "$cmd:$tail";
2097:
2098: my ($udom,$uname)=split(/:/,$tail);
2099: chomp($uname);
2100: my $passfile = &password_filename($udom, $uname);
2101: if($passfile) {
2102: &Reply( $client, "found\n", $userinput);
2103: } else {
2104: &Failure($client, "not_found\n", $userinput);
2105: }
2106: return 1;
2107: }
2108: ®ister_handler("home", \&is_home_handler, 0,1,0);
2109:
2110: #
2111: # Process an update request for a resource.
2112: # A resource has been modified that we hold a subscription to.
2113: # If the resource is not local, then we must update, or at least invalidate our
2114: # cached copy of the resource.
2115: # Parameters:
2116: # $cmd - The command that got us here.
2117: # $tail - Tail of the command (remaining parameters).
2118: # $client - File descriptor connected to client.
2119: # Returns
2120: # 0 - Requested to exit, caller should shut down.
2121: # 1 - Continue processing.
2122: # Implicit inputs:
2123: # The authentication systems describe above have their own forms of implicit
2124: # input into the authentication process that are described above.
2125: #
2126: sub update_resource_handler {
2127:
2128: my ($cmd, $tail, $client) = @_;
2129:
2130: my $userinput = "$cmd:$tail";
2131:
2132: my $fname= $tail; # This allows interactive testing
2133:
2134:
2135: my $ownership=ishome($fname);
2136: if ($ownership eq 'not_owner') {
2137: if (-e $fname) {
2138: # Delete preview file, if exists
2139: unlink("$fname.tmp");
2140: # Get usage stats
2141: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2142: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2143: my $now=time;
2144: my $since=$now-$atime;
2145: # If the file has not been used within lonExpire seconds,
2146: # unsubscribe from it and delete local copy
2147: if ($since>$perlvar{'lonExpire'}) {
2148: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2149: &devalidate_meta_cache($fname);
2150: unlink("$fname");
2151: unlink("$fname.meta");
2152: } else {
2153: # Yes, this is in active use. Get a fresh copy. Since it might be in
2154: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2155: my $transname="$fname.in.transfer";
2156: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2157: my $response;
2158: alarm(120);
2159: {
2160: my $ua=new LWP::UserAgent;
2161: my $request=new HTTP::Request('GET',"$remoteurl");
2162: $response=$ua->request($request,$transname);
2163: }
2164: alarm(0);
2165: if ($response->is_error()) {
2166: unlink($transname);
2167: my $message=$response->status_line;
2168: &logthis("LWP GET: $message for $fname ($remoteurl)");
2169: } else {
2170: if ($remoteurl!~/\.meta$/) {
2171: alarm(120);
2172: {
2173: my $ua=new LWP::UserAgent;
2174: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2175: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2176: if ($mresponse->is_error()) {
2177: unlink($fname.'.meta');
2178: }
2179: }
2180: alarm(0);
2181: }
2182: # we successfully transfered, copy file over to real name
2183: rename($transname,$fname);
2184: &devalidate_meta_cache($fname);
2185: }
2186: }
2187: &Reply( $client, "ok\n", $userinput);
2188: } else {
2189: &Failure($client, "not_found\n", $userinput);
2190: }
2191: } else {
2192: &Failure($client, "rejected\n", $userinput);
2193: }
2194: return 1;
2195: }
2196: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2197:
2198: sub devalidate_meta_cache {
2199: my ($url) = @_;
2200: use Cache::Memcached;
2201: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2202: $url = &Apache::lonnet::declutter($url);
2203: $url =~ s-\.meta$--;
2204: my $id = &escape('meta:'.$url);
2205: $memcache->delete($id);
2206: }
2207:
2208: #
2209: # Fetch a user file from a remote server to the user's home directory
2210: # userfiles subdir.
2211: # Parameters:
2212: # $cmd - The command that got us here.
2213: # $tail - Tail of the command (remaining parameters).
2214: # $client - File descriptor connected to client.
2215: # Returns
2216: # 0 - Requested to exit, caller should shut down.
2217: # 1 - Continue processing.
2218: #
2219: sub fetch_user_file_handler {
2220:
2221: my ($cmd, $tail, $client) = @_;
2222:
2223: my $userinput = "$cmd:$tail";
2224: my $fname = $tail;
2225: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2226: my $udir=&propath($udom,$uname).'/userfiles';
2227: unless (-e $udir) {
2228: mkdir($udir,0770);
2229: }
2230: Debug("fetch user file for $fname");
2231: if (-e $udir) {
2232: $ufile=~s/^[\.\~]+//;
2233:
2234: # IF necessary, create the path right down to the file.
2235: # Note that any regular files in the way of this path are
2236: # wiped out to deal with some earlier folly of mine.
2237:
2238: if (!&mkpath($udir.'/'.$ufile)) {
2239: &Failure($client, "unable_to_create\n", $userinput);
2240: }
2241:
2242: my $destname=$udir.'/'.$ufile;
2243: my $transname=$udir.'/'.$ufile.'.in.transit';
2244: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2245: my $response;
2246: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2247: alarm(120);
2248: {
2249: my $ua=new LWP::UserAgent;
2250: my $request=new HTTP::Request('GET',"$remoteurl");
2251: $response=$ua->request($request,$transname);
2252: }
2253: alarm(0);
2254: if ($response->is_error()) {
2255: unlink($transname);
2256: my $message=$response->status_line;
2257: &logthis("LWP GET: $message for $fname ($remoteurl)");
2258: &Failure($client, "failed\n", $userinput);
2259: } else {
2260: Debug("Renaming $transname to $destname");
2261: if (!rename($transname,$destname)) {
2262: &logthis("Unable to move $transname to $destname");
2263: unlink($transname);
2264: &Failure($client, "failed\n", $userinput);
2265: } else {
2266: &Reply($client, "ok\n", $userinput);
2267: }
2268: }
2269: } else {
2270: &Failure($client, "not_home\n", $userinput);
2271: }
2272: return 1;
2273: }
2274: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2275:
2276: #
2277: # Remove a file from a user's home directory userfiles subdirectory.
2278: # Parameters:
2279: # cmd - the Lond request keyword that got us here.
2280: # tail - the part of the command past the keyword.
2281: # client- File descriptor connected with the client.
2282: #
2283: # Returns:
2284: # 1 - Continue processing.
2285: sub remove_user_file_handler {
2286: my ($cmd, $tail, $client) = @_;
2287:
2288: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2289:
2290: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2291: if ($ufile =~m|/\.\./|) {
2292: # any files paths with /../ in them refuse
2293: # to deal with
2294: &Failure($client, "refused\n", "$cmd:$tail");
2295: } else {
2296: my $udir = &propath($udom,$uname);
2297: if (-e $udir) {
2298: my $file=$udir.'/userfiles/'.$ufile;
2299: if (-e $file) {
2300: #
2301: # If the file is a regular file unlink is fine...
2302: # However it's possible the client wants a dir.
2303: # removed, in which case rmdir is more approprate:
2304: #
2305: if (-f $file){
2306: unlink($file);
2307: } elsif(-d $file) {
2308: rmdir($file);
2309: }
2310: if (-e $file) {
2311: # File is still there after we deleted it ?!?
2312:
2313: &Failure($client, "failed\n", "$cmd:$tail");
2314: } else {
2315: &Reply($client, "ok\n", "$cmd:$tail");
2316: }
2317: } else {
2318: &Failure($client, "not_found\n", "$cmd:$tail");
2319: }
2320: } else {
2321: &Failure($client, "not_home\n", "$cmd:$tail");
2322: }
2323: }
2324: return 1;
2325: }
2326: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2327:
2328: #
2329: # make a directory in a user's home directory userfiles subdirectory.
2330: # Parameters:
2331: # cmd - the Lond request keyword that got us here.
2332: # tail - the part of the command past the keyword.
2333: # client- File descriptor connected with the client.
2334: #
2335: # Returns:
2336: # 1 - Continue processing.
2337: sub mkdir_user_file_handler {
2338: my ($cmd, $tail, $client) = @_;
2339:
2340: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2341: $dir=&unescape($dir);
2342: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2343: if ($ufile =~m|/\.\./|) {
2344: # any files paths with /../ in them refuse
2345: # to deal with
2346: &Failure($client, "refused\n", "$cmd:$tail");
2347: } else {
2348: my $udir = &propath($udom,$uname);
2349: if (-e $udir) {
2350: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2351: if (!&mkpath($newdir)) {
2352: &Failure($client, "failed\n", "$cmd:$tail");
2353: }
2354: &Reply($client, "ok\n", "$cmd:$tail");
2355: } else {
2356: &Failure($client, "not_home\n", "$cmd:$tail");
2357: }
2358: }
2359: return 1;
2360: }
2361: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2362:
2363: #
2364: # rename a file in a user's home directory userfiles subdirectory.
2365: # Parameters:
2366: # cmd - the Lond request keyword that got us here.
2367: # tail - the part of the command past the keyword.
2368: # client- File descriptor connected with the client.
2369: #
2370: # Returns:
2371: # 1 - Continue processing.
2372: sub rename_user_file_handler {
2373: my ($cmd, $tail, $client) = @_;
2374:
2375: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2376: $old=&unescape($old);
2377: $new=&unescape($new);
2378: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2379: # any files paths with /../ in them refuse to deal with
2380: &Failure($client, "refused\n", "$cmd:$tail");
2381: } else {
2382: my $udir = &propath($udom,$uname);
2383: if (-e $udir) {
2384: my $oldfile=$udir.'/userfiles/'.$old;
2385: my $newfile=$udir.'/userfiles/'.$new;
2386: if (-e $newfile) {
2387: &Failure($client, "exists\n", "$cmd:$tail");
2388: } elsif (! -e $oldfile) {
2389: &Failure($client, "not_found\n", "$cmd:$tail");
2390: } else {
2391: if (!rename($oldfile,$newfile)) {
2392: &Failure($client, "failed\n", "$cmd:$tail");
2393: } else {
2394: &Reply($client, "ok\n", "$cmd:$tail");
2395: }
2396: }
2397: } else {
2398: &Failure($client, "not_home\n", "$cmd:$tail");
2399: }
2400: }
2401: return 1;
2402: }
2403: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2404:
2405: #
2406: # Checks if the specified user has an active session on the server
2407: # return ok if so, not_found if not
2408: #
2409: # Parameters:
2410: # cmd - The request keyword that dispatched to tus.
2411: # tail - The tail of the request (colon separated parameters).
2412: # client - Filehandle open on the client.
2413: # Return:
2414: # 1.
2415: sub user_has_session_handler {
2416: my ($cmd, $tail, $client) = @_;
2417:
2418: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2419:
2420: &logthis("Looking for $udom $uname");
2421: opendir(DIR,$perlvar{'lonIDsDir'});
2422: my $filename;
2423: while ($filename=readdir(DIR)) {
2424: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2425: }
2426: if ($filename) {
2427: &Reply($client, "ok\n", "$cmd:$tail");
2428: } else {
2429: &Failure($client, "not_found\n", "$cmd:$tail");
2430: }
2431: return 1;
2432:
2433: }
2434: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2435:
2436: #
2437: # Authenticate access to a user file by checking that the token the user's
2438: # passed also exists in their session file
2439: #
2440: # Parameters:
2441: # cmd - The request keyword that dispatched to tus.
2442: # tail - The tail of the request (colon separated parameters).
2443: # client - Filehandle open on the client.
2444: # Return:
2445: # 1.
2446: sub token_auth_user_file_handler {
2447: my ($cmd, $tail, $client) = @_;
2448:
2449: my ($fname, $session) = split(/:/, $tail);
2450:
2451: chomp($session);
2452: my $reply="non_auth";
2453: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2454: if (open(ENVIN,"$file")) {
2455: flock(ENVIN,LOCK_SH);
2456: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2457: if (exists($disk_env{"userfile.$fname"})) {
2458: $reply="ok";
2459: } else {
2460: foreach my $envname (keys(%disk_env)) {
2461: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2462: $reply="ok";
2463: last;
2464: }
2465: }
2466: }
2467: untie(%disk_env);
2468: close(ENVIN);
2469: &Reply($client, \$reply, "$cmd:$tail");
2470: } else {
2471: &Failure($client, "invalid_token\n", "$cmd:$tail");
2472: }
2473: return 1;
2474:
2475: }
2476: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2477:
2478: #
2479: # Unsubscribe from a resource.
2480: #
2481: # Parameters:
2482: # $cmd - The command that got us here.
2483: # $tail - Tail of the command (remaining parameters).
2484: # $client - File descriptor connected to client.
2485: # Returns
2486: # 0 - Requested to exit, caller should shut down.
2487: # 1 - Continue processing.
2488: #
2489: sub unsubscribe_handler {
2490: my ($cmd, $tail, $client) = @_;
2491:
2492: my $userinput= "$cmd:$tail";
2493:
2494: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2495:
2496: &Debug("Unsubscribing $fname");
2497: if (-e $fname) {
2498: &Debug("Exists");
2499: &Reply($client, &unsub($fname,$clientip), $userinput);
2500: } else {
2501: &Failure($client, "not_found\n", $userinput);
2502: }
2503: return 1;
2504: }
2505: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2506:
2507: # Subscribe to a resource
2508: #
2509: # Parameters:
2510: # $cmd - The command that got us here.
2511: # $tail - Tail of the command (remaining parameters).
2512: # $client - File descriptor connected to client.
2513: # Returns
2514: # 0 - Requested to exit, caller should shut down.
2515: # 1 - Continue processing.
2516: #
2517: sub subscribe_handler {
2518: my ($cmd, $tail, $client)= @_;
2519:
2520: my $userinput = "$cmd:$tail";
2521:
2522: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2523:
2524: return 1;
2525: }
2526: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2527:
2528: #
2529: # Determine the latest version of a resource (it looks for the highest
2530: # past version and then returns that +1)
2531: #
2532: # Parameters:
2533: # $cmd - The command that got us here.
2534: # $tail - Tail of the command (remaining parameters).
2535: # (Should consist of an absolute path to a file)
2536: # $client - File descriptor connected to client.
2537: # Returns
2538: # 0 - Requested to exit, caller should shut down.
2539: # 1 - Continue processing.
2540: #
2541: sub current_version_handler {
2542: my ($cmd, $tail, $client) = @_;
2543:
2544: my $userinput= "$cmd:$tail";
2545:
2546: my $fname = $tail;
2547: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2548: return 1;
2549:
2550: }
2551: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2552:
2553: # Make an entry in a user's activity log.
2554: #
2555: # Parameters:
2556: # $cmd - The command that got us here.
2557: # $tail - Tail of the command (remaining parameters).
2558: # $client - File descriptor connected to client.
2559: # Returns
2560: # 0 - Requested to exit, caller should shut down.
2561: # 1 - Continue processing.
2562: #
2563: sub activity_log_handler {
2564: my ($cmd, $tail, $client) = @_;
2565:
2566:
2567: my $userinput= "$cmd:$tail";
2568:
2569: my ($udom,$uname,$what)=split(/:/,$tail);
2570: chomp($what);
2571: my $proname=&propath($udom,$uname);
2572: my $now=time;
2573: my $hfh;
2574: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2575: print $hfh "$now:$clientname:$what\n";
2576: &Reply( $client, "ok\n", $userinput);
2577: } else {
2578: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2579: ."while attempting log\n",
2580: $userinput);
2581: }
2582:
2583: return 1;
2584: }
2585: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2586:
2587: #
2588: # Put a namespace entry in a user profile hash.
2589: # My druthers would be for this to be an encrypted interaction too.
2590: # anything that might be an inadvertent covert channel about either
2591: # user authentication or user personal information....
2592: #
2593: # Parameters:
2594: # $cmd - The command that got us here.
2595: # $tail - Tail of the command (remaining parameters).
2596: # $client - File descriptor connected to client.
2597: # Returns
2598: # 0 - Requested to exit, caller should shut down.
2599: # 1 - Continue processing.
2600: #
2601: sub put_user_profile_entry {
2602: my ($cmd, $tail, $client) = @_;
2603:
2604: my $userinput = "$cmd:$tail";
2605:
2606: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2607: if ($namespace ne 'roles') {
2608: chomp($what);
2609: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2610: &GDBM_WRCREAT(),"P",$what);
2611: if($hashref) {
2612: my @pairs=split(/\&/,$what);
2613: foreach my $pair (@pairs) {
2614: my ($key,$value)=split(/=/,$pair);
2615: $hashref->{$key}=$value;
2616: }
2617: if (&untie_user_hash($hashref)) {
2618: &Reply( $client, "ok\n", $userinput);
2619: } else {
2620: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2621: "while attempting put\n",
2622: $userinput);
2623: }
2624: } else {
2625: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2626: "while attempting put\n", $userinput);
2627: }
2628: } else {
2629: &Failure( $client, "refused\n", $userinput);
2630: }
2631:
2632: return 1;
2633: }
2634: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2635:
2636: # Put a piece of new data in hash, returns error if entry already exists
2637: # Parameters:
2638: # $cmd - The command that got us here.
2639: # $tail - Tail of the command (remaining parameters).
2640: # $client - File descriptor connected to client.
2641: # Returns
2642: # 0 - Requested to exit, caller should shut down.
2643: # 1 - Continue processing.
2644: #
2645: sub newput_user_profile_entry {
2646: my ($cmd, $tail, $client) = @_;
2647:
2648: my $userinput = "$cmd:$tail";
2649:
2650: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2651: if ($namespace eq 'roles') {
2652: &Failure( $client, "refused\n", $userinput);
2653: return 1;
2654: }
2655:
2656: chomp($what);
2657:
2658: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2659: &GDBM_WRCREAT(),"N",$what);
2660: if(!$hashref) {
2661: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2662: "while attempting put\n", $userinput);
2663: return 1;
2664: }
2665:
2666: my @pairs=split(/\&/,$what);
2667: foreach my $pair (@pairs) {
2668: my ($key,$value)=split(/=/,$pair);
2669: if (exists($hashref->{$key})) {
2670: &Failure($client, "key_exists: ".$key."\n",$userinput);
2671: return 1;
2672: }
2673: }
2674:
2675: foreach my $pair (@pairs) {
2676: my ($key,$value)=split(/=/,$pair);
2677: $hashref->{$key}=$value;
2678: }
2679:
2680: if (&untie_user_hash($hashref)) {
2681: &Reply( $client, "ok\n", $userinput);
2682: } else {
2683: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2684: "while attempting put\n",
2685: $userinput);
2686: }
2687: return 1;
2688: }
2689: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2690:
2691: #
2692: # Increment a profile entry in the user history file.
2693: # The history contains keyword value pairs. In this case,
2694: # The value itself is a pair of numbers. The first, the current value
2695: # the second an increment that this function applies to the current
2696: # value.
2697: #
2698: # Parameters:
2699: # $cmd - The command that got us here.
2700: # $tail - Tail of the command (remaining parameters).
2701: # $client - File descriptor connected to client.
2702: # Returns
2703: # 0 - Requested to exit, caller should shut down.
2704: # 1 - Continue processing.
2705: #
2706: sub increment_user_value_handler {
2707: my ($cmd, $tail, $client) = @_;
2708:
2709: my $userinput = "$cmd:$tail";
2710:
2711: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2712: if ($namespace ne 'roles') {
2713: chomp($what);
2714: my $hashref = &tie_user_hash($udom, $uname,
2715: $namespace, &GDBM_WRCREAT(),
2716: "P",$what);
2717: if ($hashref) {
2718: my @pairs=split(/\&/,$what);
2719: foreach my $pair (@pairs) {
2720: my ($key,$value)=split(/=/,$pair);
2721: $value = &unescape($value);
2722: # We could check that we have a number...
2723: if (! defined($value) || $value eq '') {
2724: $value = 1;
2725: }
2726: $hashref->{$key}+=$value;
2727: if ($namespace eq 'nohist_resourcetracker') {
2728: if ($hashref->{$key} < 0) {
2729: $hashref->{$key} = 0;
2730: }
2731: }
2732: }
2733: if (&untie_user_hash($hashref)) {
2734: &Reply( $client, "ok\n", $userinput);
2735: } else {
2736: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2737: "while attempting inc\n", $userinput);
2738: }
2739: } else {
2740: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2741: "while attempting inc\n", $userinput);
2742: }
2743: } else {
2744: &Failure($client, "refused\n", $userinput);
2745: }
2746:
2747: return 1;
2748: }
2749: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2750:
2751: #
2752: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2753: # Each 'role' a user has implies a set of permissions. Adding a new role
2754: # for a person grants the permissions packaged with that role
2755: # to that user when the role is selected.
2756: #
2757: # Parameters:
2758: # $cmd - The command string (rolesput).
2759: # $tail - The remainder of the request line. For rolesput this
2760: # consists of a colon separated list that contains:
2761: # The domain and user that is granting the role (logged).
2762: # The domain and user that is getting the role.
2763: # The roles being granted as a set of & separated pairs.
2764: # each pair a key value pair.
2765: # $client - File descriptor connected to the client.
2766: # Returns:
2767: # 0 - If the daemon should exit
2768: # 1 - To continue processing.
2769: #
2770: #
2771: sub roles_put_handler {
2772: my ($cmd, $tail, $client) = @_;
2773:
2774: my $userinput = "$cmd:$tail";
2775:
2776: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2777:
2778:
2779: my $namespace='roles';
2780: chomp($what);
2781: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2782: &GDBM_WRCREAT(), "P",
2783: "$exedom:$exeuser:$what");
2784: #
2785: # Log the attempt to set a role. The {}'s here ensure that the file
2786: # handle is open for the minimal amount of time. Since the flush
2787: # is done on close this improves the chances the log will be an un-
2788: # corrupted ordered thing.
2789: if ($hashref) {
2790: my $pass_entry = &get_auth_type($udom, $uname);
2791: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2792: $auth_type = $auth_type.":";
2793: my @pairs=split(/\&/,$what);
2794: foreach my $pair (@pairs) {
2795: my ($key,$value)=split(/=/,$pair);
2796: &manage_permissions($key, $udom, $uname,
2797: $auth_type);
2798: $hashref->{$key}=$value;
2799: }
2800: if (&untie_user_hash($hashref)) {
2801: &Reply($client, "ok\n", $userinput);
2802: } else {
2803: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2804: "while attempting rolesput\n", $userinput);
2805: }
2806: } else {
2807: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2808: "while attempting rolesput\n", $userinput);
2809: }
2810: return 1;
2811: }
2812: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2813:
2814: #
2815: # Deletes (removes) a role for a user. This is equivalent to removing
2816: # a permissions package associated with the role from the user's profile.
2817: #
2818: # Parameters:
2819: # $cmd - The command (rolesdel)
2820: # $tail - The remainder of the request line. This consists
2821: # of:
2822: # The domain and user requesting the change (logged)
2823: # The domain and user being changed.
2824: # The roles being revoked. These are shipped to us
2825: # as a bunch of & separated role name keywords.
2826: # $client - The file handle open on the client.
2827: # Returns:
2828: # 1 - Continue processing
2829: # 0 - Exit.
2830: #
2831: sub roles_delete_handler {
2832: my ($cmd, $tail, $client) = @_;
2833:
2834: my $userinput = "$cmd:$tail";
2835:
2836: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2837: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2838: "what = ".$what);
2839: my $namespace='roles';
2840: chomp($what);
2841: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2842: &GDBM_WRCREAT(), "D",
2843: "$exedom:$exeuser:$what");
2844:
2845: if ($hashref) {
2846: my @rolekeys=split(/\&/,$what);
2847:
2848: foreach my $key (@rolekeys) {
2849: delete $hashref->{$key};
2850: }
2851: if (&untie_user_hash($hashref)) {
2852: &Reply($client, "ok\n", $userinput);
2853: } else {
2854: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2855: "while attempting rolesdel\n", $userinput);
2856: }
2857: } else {
2858: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2859: "while attempting rolesdel\n", $userinput);
2860: }
2861:
2862: return 1;
2863: }
2864: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2865:
2866: # Unencrypted get from a user's profile database. See
2867: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2868: # This function retrieves a keyed item from a specific named database in the
2869: # user's directory.
2870: #
2871: # Parameters:
2872: # $cmd - Command request keyword (get).
2873: # $tail - Tail of the command. This is a colon separated list
2874: # consisting of the domain and username that uniquely
2875: # identifies the profile,
2876: # The 'namespace' which selects the gdbm file to
2877: # do the lookup in,
2878: # & separated list of keys to lookup. Note that
2879: # the values are returned as an & separated list too.
2880: # $client - File descriptor open on the client.
2881: # Returns:
2882: # 1 - Continue processing.
2883: # 0 - Exit.
2884: #
2885: sub get_profile_entry {
2886: my ($cmd, $tail, $client) = @_;
2887:
2888: my $userinput= "$cmd:$tail";
2889:
2890: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2891: chomp($what);
2892:
2893:
2894: my $replystring = read_profile($udom, $uname, $namespace, $what);
2895: my ($first) = split(/:/,$replystring);
2896: if($first ne "error") {
2897: &Reply($client, \$replystring, $userinput);
2898: } else {
2899: &Failure($client, $replystring." while attempting get\n", $userinput);
2900: }
2901: return 1;
2902:
2903:
2904: }
2905: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2906:
2907: #
2908: # Process the encrypted get request. Note that the request is sent
2909: # in clear, but the reply is encrypted. This is a small covert channel:
2910: # information about the sensitive keys is given to the snooper. Just not
2911: # information about the values of the sensitive key. Hmm if I wanted to
2912: # know these I'd snoop for the egets. Get the profile item names from them
2913: # and then issue a get for them since there's no enforcement of the
2914: # requirement of an encrypted get for particular profile items. If I
2915: # were re-doing this, I'd force the request to be encrypted as well as the
2916: # reply. I'd also just enforce encrypted transactions for all gets since
2917: # that would prevent any covert channel snooping.
2918: #
2919: # Parameters:
2920: # $cmd - Command keyword of request (eget).
2921: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2922: # $client - File open on the client.
2923: # Returns:
2924: # 1 - Continue processing
2925: # 0 - server should exit.
2926: sub get_profile_entry_encrypted {
2927: my ($cmd, $tail, $client) = @_;
2928:
2929: my $userinput = "$cmd:$tail";
2930:
2931: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2932: chomp($what);
2933: my $qresult = read_profile($udom, $uname, $namespace, $what);
2934: my ($first) = split(/:/, $qresult);
2935: if($first ne "error") {
2936:
2937: if ($cipher) {
2938: my $cmdlength=length($qresult);
2939: $qresult.=" ";
2940: my $encqresult='';
2941: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2942: $encqresult.= unpack("H16",
2943: $cipher->encrypt(substr($qresult,
2944: $encidx,
2945: 8)));
2946: }
2947: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2948: } else {
2949: &Failure( $client, "error:no_key\n", $userinput);
2950: }
2951: } else {
2952: &Failure($client, "$qresult while attempting eget\n", $userinput);
2953:
2954: }
2955:
2956: return 1;
2957: }
2958: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
2959:
2960: #
2961: # Deletes a key in a user profile database.
2962: #
2963: # Parameters:
2964: # $cmd - Command keyword (del).
2965: # $tail - Command tail. IN this case a colon
2966: # separated list containing:
2967: # The domain and user that identifies uniquely
2968: # the identity of the user.
2969: # The profile namespace (name of the profile
2970: # database file).
2971: # & separated list of keywords to delete.
2972: # $client - File open on client socket.
2973: # Returns:
2974: # 1 - Continue processing
2975: # 0 - Exit server.
2976: #
2977: #
2978: sub delete_profile_entry {
2979: my ($cmd, $tail, $client) = @_;
2980:
2981: my $userinput = "cmd:$tail";
2982:
2983: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2984: chomp($what);
2985: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2986: &GDBM_WRCREAT(),
2987: "D",$what);
2988: if ($hashref) {
2989: my @keys=split(/\&/,$what);
2990: foreach my $key (@keys) {
2991: delete($hashref->{$key});
2992: }
2993: if (&untie_user_hash($hashref)) {
2994: &Reply($client, "ok\n", $userinput);
2995: } else {
2996: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2997: "while attempting del\n", $userinput);
2998: }
2999: } else {
3000: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3001: "while attempting del\n", $userinput);
3002: }
3003: return 1;
3004: }
3005: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3006:
3007: #
3008: # List the set of keys that are defined in a profile database file.
3009: # A successful reply from this will contain an & separated list of
3010: # the keys.
3011: # Parameters:
3012: # $cmd - Command request (keys).
3013: # $tail - Remainder of the request, a colon separated
3014: # list containing domain/user that identifies the
3015: # user being queried, and the database namespace
3016: # (database filename essentially).
3017: # $client - File open on the client.
3018: # Returns:
3019: # 1 - Continue processing.
3020: # 0 - Exit the server.
3021: #
3022: sub get_profile_keys {
3023: my ($cmd, $tail, $client) = @_;
3024:
3025: my $userinput = "$cmd:$tail";
3026:
3027: my ($udom,$uname,$namespace)=split(/:/,$tail);
3028: my $qresult='';
3029: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3030: &GDBM_READER());
3031: if ($hashref) {
3032: foreach my $key (keys %$hashref) {
3033: $qresult.="$key&";
3034: }
3035: if (&untie_user_hash($hashref)) {
3036: $qresult=~s/\&$//;
3037: &Reply($client, \$qresult, $userinput);
3038: } else {
3039: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3040: "while attempting keys\n", $userinput);
3041: }
3042: } else {
3043: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3044: "while attempting keys\n", $userinput);
3045: }
3046:
3047: return 1;
3048: }
3049: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3050:
3051: #
3052: # Dump the contents of a user profile database.
3053: # Note that this constitutes a very large covert channel too since
3054: # the dump will return sensitive information that is not encrypted.
3055: # The naive security assumption is that the session negotiation ensures
3056: # our client is trusted and I don't believe that's assured at present.
3057: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3058: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3059: #
3060: # Parameters:
3061: # $cmd - The command request keyword (currentdump).
3062: # $tail - Remainder of the request, consisting of a colon
3063: # separated list that has the domain/username and
3064: # the namespace to dump (database file).
3065: # $client - file open on the remote client.
3066: # Returns:
3067: # 1 - Continue processing.
3068: # 0 - Exit the server.
3069: #
3070: sub dump_profile_database {
3071: my ($cmd, $tail, $client) = @_;
3072:
3073: my $userinput = "$cmd:$tail";
3074:
3075: my ($udom,$uname,$namespace) = split(/:/,$tail);
3076: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3077: &GDBM_READER());
3078: if ($hashref) {
3079: # Structure of %data:
3080: # $data{$symb}->{$parameter}=$value;
3081: # $data{$symb}->{'v.'.$parameter}=$version;
3082: # since $parameter will be unescaped, we do not
3083: # have to worry about silly parameter names...
3084:
3085: my $qresult='';
3086: my %data = (); # A hash of anonymous hashes..
3087: while (my ($key,$value) = each(%$hashref)) {
3088: my ($v,$symb,$param) = split(/:/,$key);
3089: next if ($v eq 'version' || $symb eq 'keys');
3090: next if (exists($data{$symb}) &&
3091: exists($data{$symb}->{$param}) &&
3092: $data{$symb}->{'v.'.$param} > $v);
3093: $data{$symb}->{$param}=$value;
3094: $data{$symb}->{'v.'.$param}=$v;
3095: }
3096: if (&untie_user_hash($hashref)) {
3097: while (my ($symb,$param_hash) = each(%data)) {
3098: while(my ($param,$value) = each (%$param_hash)){
3099: next if ($param =~ /^v\./); # Ignore versions...
3100: #
3101: # Just dump the symb=value pairs separated by &
3102: #
3103: $qresult.=$symb.':'.$param.'='.$value.'&';
3104: }
3105: }
3106: chop($qresult);
3107: &Reply($client , \$qresult, $userinput);
3108: } else {
3109: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3110: "while attempting currentdump\n", $userinput);
3111: }
3112: } else {
3113: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3114: "while attempting currentdump\n", $userinput);
3115: }
3116:
3117: return 1;
3118: }
3119: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3120:
3121: #
3122: # Dump a profile database with an optional regular expression
3123: # to match against the keys. In this dump, no effort is made
3124: # to separate symb from version information. Presumably the
3125: # databases that are dumped by this command are of a different
3126: # structure. Need to look at this and improve the documentation of
3127: # both this and the currentdump handler.
3128: # Parameters:
3129: # $cmd - The command keyword.
3130: # $tail - All of the characters after the $cmd:
3131: # These are expected to be a colon
3132: # separated list containing:
3133: # domain/user - identifying the user.
3134: # namespace - identifying the database.
3135: # regexp - optional regular expression
3136: # that is matched against
3137: # database keywords to do
3138: # selective dumps.
3139: # $client - Channel open on the client.
3140: # Returns:
3141: # 1 - Continue processing.
3142: # Side effects:
3143: # response is written to $client.
3144: #
3145: sub dump_with_regexp {
3146: my ($cmd, $tail, $client) = @_;
3147:
3148:
3149: my $userinput = "$cmd:$tail";
3150:
3151: my ($udom,$uname,$namespace,$regexp,$range,$extra)=split(/:/,$tail);
3152: if (defined($regexp)) {
3153: $regexp=&unescape($regexp);
3154: } else {
3155: $regexp='.';
3156: }
3157: my ($start,$end);
3158: if (defined($range)) {
3159: if ($range =~/^(\d+)\-(\d+)$/) {
3160: ($start,$end) = ($1,$2);
3161: } elsif ($range =~/^(\d+)$/) {
3162: ($start,$end) = (0,$1);
3163: } else {
3164: undef($range);
3165: }
3166: }
3167: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3168: &GDBM_READER());
3169: my $clientcheckrole;
3170: if ($hashref) {
3171: my $qresult='';
3172: my $count=0;
3173: if ($extra ne '') {
3174: $extra = &Apache::lonnet::thaw_unescape($extra);
3175: $clientcheckrole = $extra->{'clientcheckrole'};
3176: }
3177: my @ids = &Apache::lonnet::current_machine_ids();
3178: my (%homecourses,$major,$minor,$now);
3179: if (($namespace eq 'roles') && (!$clientcheckrole)) {
3180: my $loncaparev = $clientversion;
3181: if ($loncaparev eq '') {
3182: $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
3183: }
3184: if ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?/) {
3185: $major = $1;
3186: $minor = $2;
3187: }
3188: $now = time;
3189: }
3190: while (my ($key,$value) = each(%$hashref)) {
3191: if ($namespace eq 'roles') {
3192: if ($key =~ m{^/($LONCAPA::match_domain)/($LONCAPA::match_courseid)(/?[^_]*)_(cc|co|in|ta|ep|ad|st|cr)$}) {
3193: my $cdom = $1;
3194: my $cnum = $2;
3195: unless ($clientcheckrole) {
3196: next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major,$minor,
3197: $now,\%homecourses,\@ids));
3198: }
3199: }
3200: }
3201: if ($regexp eq '.') {
3202: $count++;
3203: if (defined($range) && $count >= $end) { last; }
3204: if (defined($range) && $count < $start) { next; }
3205: $qresult.=$key.'='.$value.'&';
3206: } else {
3207: my $unescapeKey = &unescape($key);
3208: if (eval('$unescapeKey=~/$regexp/')) {
3209: $count++;
3210: if (defined($range) && $count >= $end) { last; }
3211: if (defined($range) && $count < $start) { next; }
3212: $qresult.="$key=$value&";
3213: }
3214: }
3215: }
3216: if (&untie_user_hash($hashref)) {
3217: if (($namespace eq 'roles') && (!$clientcheckrole)) {
3218: if (keys(%homecourses) > 0) {
3219: $qresult .= &check_homecourses(\%homecourses,$udom,$regexp,$count,
3220: $range,$start,$end,$major,$minor);
3221: }
3222: }
3223: chop($qresult);
3224: &Reply($client, \$qresult, $userinput);
3225: } else {
3226: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3227: "while attempting dump\n", $userinput);
3228: }
3229: } else {
3230: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3231: "while attempting dump\n", $userinput);
3232: }
3233:
3234: return 1;
3235: }
3236: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3237:
3238: # Store a set of key=value pairs associated with a versioned name.
3239: #
3240: # Parameters:
3241: # $cmd - Request command keyword.
3242: # $tail - Tail of the request. This is a colon
3243: # separated list containing:
3244: # domain/user - User and authentication domain.
3245: # namespace - Name of the database being modified
3246: # rid - Resource keyword to modify.
3247: # what - new value associated with rid.
3248: #
3249: # $client - Socket open on the client.
3250: #
3251: #
3252: # Returns:
3253: # 1 (keep on processing).
3254: # Side-Effects:
3255: # Writes to the client
3256: sub store_handler {
3257: my ($cmd, $tail, $client) = @_;
3258:
3259: my $userinput = "$cmd:$tail";
3260:
3261: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3262: if ($namespace ne 'roles') {
3263:
3264: chomp($what);
3265: my @pairs=split(/\&/,$what);
3266: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3267: &GDBM_WRCREAT(), "S",
3268: "$rid:$what");
3269: if ($hashref) {
3270: my $now = time;
3271: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3272: my $key;
3273: $hashref->{"version:$rid"}++;
3274: my $version=$hashref->{"version:$rid"};
3275: my $allkeys='';
3276: foreach my $pair (@pairs) {
3277: my ($key,$value)=split(/=/,$pair);
3278: $allkeys.=$key.':';
3279: $hashref->{"$version:$rid:$key"}=$value;
3280: }
3281: $hashref->{"$version:$rid:timestamp"}=$now;
3282: $allkeys.='timestamp';
3283: $hashref->{"$version:keys:$rid"}=$allkeys;
3284: if (&untie_user_hash($hashref)) {
3285: &Reply($client, "ok\n", $userinput);
3286: } else {
3287: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3288: "while attempting store\n", $userinput);
3289: }
3290: } else {
3291: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3292: "while attempting store\n", $userinput);
3293: }
3294: } else {
3295: &Failure($client, "refused\n", $userinput);
3296: }
3297:
3298: return 1;
3299: }
3300: ®ister_handler("store", \&store_handler, 0, 1, 0);
3301:
3302: # Modify a set of key=value pairs associated with a versioned name.
3303: #
3304: # Parameters:
3305: # $cmd - Request command keyword.
3306: # $tail - Tail of the request. This is a colon
3307: # separated list containing:
3308: # domain/user - User and authentication domain.
3309: # namespace - Name of the database being modified
3310: # rid - Resource keyword to modify.
3311: # v - Version item to modify
3312: # what - new value associated with rid.
3313: #
3314: # $client - Socket open on the client.
3315: #
3316: #
3317: # Returns:
3318: # 1 (keep on processing).
3319: # Side-Effects:
3320: # Writes to the client
3321: sub putstore_handler {
3322: my ($cmd, $tail, $client) = @_;
3323:
3324: my $userinput = "$cmd:$tail";
3325:
3326: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3327: if ($namespace ne 'roles') {
3328:
3329: chomp($what);
3330: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3331: &GDBM_WRCREAT(), "M",
3332: "$rid:$v:$what");
3333: if ($hashref) {
3334: my $now = time;
3335: my %data = &hash_extract($what);
3336: my @allkeys;
3337: while (my($key,$value) = each(%data)) {
3338: push(@allkeys,$key);
3339: $hashref->{"$v:$rid:$key"} = $value;
3340: }
3341: my $allkeys = join(':',@allkeys);
3342: $hashref->{"$v:keys:$rid"}=$allkeys;
3343:
3344: if (&untie_user_hash($hashref)) {
3345: &Reply($client, "ok\n", $userinput);
3346: } else {
3347: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3348: "while attempting store\n", $userinput);
3349: }
3350: } else {
3351: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3352: "while attempting store\n", $userinput);
3353: }
3354: } else {
3355: &Failure($client, "refused\n", $userinput);
3356: }
3357:
3358: return 1;
3359: }
3360: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3361:
3362: sub hash_extract {
3363: my ($str)=@_;
3364: my %hash;
3365: foreach my $pair (split(/\&/,$str)) {
3366: my ($key,$value)=split(/=/,$pair);
3367: $hash{$key}=$value;
3368: }
3369: return (%hash);
3370: }
3371: sub hash_to_str {
3372: my ($hash_ref)=@_;
3373: my $str;
3374: foreach my $key (keys(%$hash_ref)) {
3375: $str.=$key.'='.$hash_ref->{$key}.'&';
3376: }
3377: $str=~s/\&$//;
3378: return $str;
3379: }
3380:
3381: #
3382: # Dump out all versions of a resource that has key=value pairs associated
3383: # with it for each version. These resources are built up via the store
3384: # command.
3385: #
3386: # Parameters:
3387: # $cmd - Command keyword.
3388: # $tail - Remainder of the request which consists of:
3389: # domain/user - User and auth. domain.
3390: # namespace - name of resource database.
3391: # rid - Resource id.
3392: # $client - socket open on the client.
3393: #
3394: # Returns:
3395: # 1 indicating the caller should not yet exit.
3396: # Side-effects:
3397: # Writes a reply to the client.
3398: # The reply is a string of the following shape:
3399: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3400: # Where the 1 above represents version 1.
3401: # this continues for all pairs of keys in all versions.
3402: #
3403: #
3404: #
3405: #
3406: sub restore_handler {
3407: my ($cmd, $tail, $client) = @_;
3408:
3409: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3410: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3411: $namespace=~s/\//\_/g;
3412: $namespace = &LONCAPA::clean_username($namespace);
3413:
3414: chomp($rid);
3415: my $qresult='';
3416: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3417: if ($hashref) {
3418: my $version=$hashref->{"version:$rid"};
3419: $qresult.="version=$version&";
3420: my $scope;
3421: for ($scope=1;$scope<=$version;$scope++) {
3422: my $vkeys=$hashref->{"$scope:keys:$rid"};
3423: my @keys=split(/:/,$vkeys);
3424: my $key;
3425: $qresult.="$scope:keys=$vkeys&";
3426: foreach $key (@keys) {
3427: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3428: }
3429: }
3430: if (&untie_user_hash($hashref)) {
3431: $qresult=~s/\&$//;
3432: &Reply( $client, \$qresult, $userinput);
3433: } else {
3434: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3435: "while attempting restore\n", $userinput);
3436: }
3437: } else {
3438: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3439: "while attempting restore\n", $userinput);
3440: }
3441:
3442: return 1;
3443:
3444:
3445: }
3446: ®ister_handler("restore", \&restore_handler, 0,1,0);
3447:
3448: #
3449: # Add a chat message to a synchronous discussion board.
3450: #
3451: # Parameters:
3452: # $cmd - Request keyword.
3453: # $tail - Tail of the command. A colon separated list
3454: # containing:
3455: # cdom - Domain on which the chat board lives
3456: # cnum - Course containing the chat board.
3457: # newpost - Body of the posting.
3458: # group - Optional group, if chat board is only
3459: # accessible in a group within the course
3460: # $client - Socket open on the client.
3461: # Returns:
3462: # 1 - Indicating caller should keep on processing.
3463: #
3464: # Side-effects:
3465: # writes a reply to the client.
3466: #
3467: #
3468: sub send_chat_handler {
3469: my ($cmd, $tail, $client) = @_;
3470:
3471:
3472: my $userinput = "$cmd:$tail";
3473:
3474: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3475: &chat_add($cdom,$cnum,$newpost,$group);
3476: &Reply($client, "ok\n", $userinput);
3477:
3478: return 1;
3479: }
3480: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3481:
3482: #
3483: # Retrieve the set of chat messages from a discussion board.
3484: #
3485: # Parameters:
3486: # $cmd - Command keyword that initiated the request.
3487: # $tail - Remainder of the request after the command
3488: # keyword. In this case a colon separated list of
3489: # chat domain - Which discussion board.
3490: # chat id - Discussion thread(?)
3491: # domain/user - Authentication domain and username
3492: # of the requesting person.
3493: # group - Optional course group containing
3494: # the board.
3495: # $client - Socket open on the client program.
3496: # Returns:
3497: # 1 - continue processing
3498: # Side effects:
3499: # Response is written to the client.
3500: #
3501: sub retrieve_chat_handler {
3502: my ($cmd, $tail, $client) = @_;
3503:
3504:
3505: my $userinput = "$cmd:$tail";
3506:
3507: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3508: my $reply='';
3509: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3510: $reply.=&escape($_).':';
3511: }
3512: $reply=~s/\:$//;
3513: &Reply($client, \$reply, $userinput);
3514:
3515:
3516: return 1;
3517: }
3518: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3519:
3520: #
3521: # Initiate a query of an sql database. SQL query repsonses get put in
3522: # a file for later retrieval. This prevents sql query results from
3523: # bottlenecking the system. Note that with loncnew, perhaps this is
3524: # less of an issue since multiple outstanding requests can be concurrently
3525: # serviced.
3526: #
3527: # Parameters:
3528: # $cmd - COmmand keyword that initiated the request.
3529: # $tail - Remainder of the command after the keyword.
3530: # For this function, this consists of a query and
3531: # 3 arguments that are self-documentingly labelled
3532: # in the original arg1, arg2, arg3.
3533: # $client - Socket open on the client.
3534: # Return:
3535: # 1 - Indicating processing should continue.
3536: # Side-effects:
3537: # a reply is written to $client.
3538: #
3539: sub send_query_handler {
3540: my ($cmd, $tail, $client) = @_;
3541:
3542:
3543: my $userinput = "$cmd:$tail";
3544:
3545: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3546: $query=~s/\n*$//g;
3547: &Reply($client, "". &sql_reply("$clientname\&$query".
3548: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3549: $userinput);
3550:
3551: return 1;
3552: }
3553: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3554:
3555: #
3556: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3557: # The query is submitted via a "querysend" transaction.
3558: # There it is passed on to the lonsql daemon, queued and issued to
3559: # mysql.
3560: # This transaction is invoked when the sql transaction is complete
3561: # it stores the query results in flie and indicates query completion.
3562: # presumably local software then fetches this response... I'm guessing
3563: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3564: # lonsql on completion of the query interacts with the lond of our
3565: # client to do a query reply storing two files:
3566: # - id - The results of the query.
3567: # - id.end - Indicating the transaction completed.
3568: # NOTE: id is a unique id assigned to the query and querysend time.
3569: # Parameters:
3570: # $cmd - Command keyword that initiated this request.
3571: # $tail - Remainder of the tail. In this case that's a colon
3572: # separated list containing the query Id and the
3573: # results of the query.
3574: # $client - Socket open on the client.
3575: # Return:
3576: # 1 - Indicating that we should continue processing.
3577: # Side effects:
3578: # ok written to the client.
3579: #
3580: sub reply_query_handler {
3581: my ($cmd, $tail, $client) = @_;
3582:
3583:
3584: my $userinput = "$cmd:$tail";
3585:
3586: my ($id,$reply)=split(/:/,$tail);
3587: my $store;
3588: my $execdir=$perlvar{'lonDaemons'};
3589: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3590: $reply=~s/\&/\n/g;
3591: print $store $reply;
3592: close $store;
3593: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3594: print $store2 "done\n";
3595: close $store2;
3596: &Reply($client, "ok\n", $userinput);
3597: } else {
3598: &Failure($client, "error: ".($!+0)
3599: ." IO::File->new Failed ".
3600: "while attempting queryreply\n", $userinput);
3601: }
3602:
3603:
3604: return 1;
3605: }
3606: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3607:
3608: #
3609: # Process the courseidput request. Not quite sure what this means
3610: # at the system level sense. It appears a gdbm file in the
3611: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3612: # a set of entries made in that database.
3613: #
3614: # Parameters:
3615: # $cmd - The command keyword that initiated this request.
3616: # $tail - Tail of the command. In this case consists of a colon
3617: # separated list contaning the domain to apply this to and
3618: # an ampersand separated list of keyword=value pairs.
3619: # Each value is a colon separated list that includes:
3620: # description, institutional code and course owner.
3621: # For backward compatibility with versions included
3622: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3623: # code and/or course owner are preserved from the existing
3624: # record when writing a new record in response to 1.1 or
3625: # 1.2 implementations of lonnet::flushcourselogs().
3626: #
3627: # $client - Socket open on the client.
3628: # Returns:
3629: # 1 - indicating that processing should continue
3630: #
3631: # Side effects:
3632: # reply is written to the client.
3633: #
3634: sub put_course_id_handler {
3635: my ($cmd, $tail, $client) = @_;
3636:
3637:
3638: my $userinput = "$cmd:$tail";
3639:
3640: my ($udom, $what) = split(/:/, $tail,2);
3641: chomp($what);
3642: my $now=time;
3643: my @pairs=split(/\&/,$what);
3644:
3645: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3646: if ($hashref) {
3647: foreach my $pair (@pairs) {
3648: my ($key,$courseinfo) = split(/=/,$pair,2);
3649: $courseinfo =~ s/=/:/g;
3650: if (defined($hashref->{$key})) {
3651: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3652: if (ref($value) eq 'HASH') {
3653: my @items = ('description','inst_code','owner','type');
3654: my @new_items = split(/:/,$courseinfo,-1);
3655: my %storehash;
3656: for (my $i=0; $i<@new_items; $i++) {
3657: $storehash{$items[$i]} = &unescape($new_items[$i]);
3658: }
3659: $hashref->{$key} =
3660: &Apache::lonnet::freeze_escape(\%storehash);
3661: my $unesc_key = &unescape($key);
3662: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3663: next;
3664: }
3665: }
3666: my @current_items = split(/:/,$hashref->{$key},-1);
3667: shift(@current_items); # remove description
3668: pop(@current_items); # remove last access
3669: my $numcurrent = scalar(@current_items);
3670: if ($numcurrent > 3) {
3671: $numcurrent = 3;
3672: }
3673: my @new_items = split(/:/,$courseinfo,-1);
3674: my $numnew = scalar(@new_items);
3675: if ($numcurrent > 0) {
3676: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3677: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3678: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3679: }
3680: }
3681: }
3682: $hashref->{$key}=$courseinfo.':'.$now;
3683: }
3684: if (&untie_domain_hash($hashref)) {
3685: &Reply( $client, "ok\n", $userinput);
3686: } else {
3687: &Failure($client, "error: ".($!+0)
3688: ." untie(GDBM) Failed ".
3689: "while attempting courseidput\n", $userinput);
3690: }
3691: } else {
3692: &Failure($client, "error: ".($!+0)
3693: ." tie(GDBM) Failed ".
3694: "while attempting courseidput\n", $userinput);
3695: }
3696:
3697: return 1;
3698: }
3699: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3700:
3701: sub put_course_id_hash_handler {
3702: my ($cmd, $tail, $client) = @_;
3703: my $userinput = "$cmd:$tail";
3704: my ($udom,$mode,$what) = split(/:/, $tail,3);
3705: chomp($what);
3706: my $now=time;
3707: my @pairs=split(/\&/,$what);
3708: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3709: if ($hashref) {
3710: foreach my $pair (@pairs) {
3711: my ($key,$value)=split(/=/,$pair);
3712: my $unesc_key = &unescape($key);
3713: if ($mode ne 'timeonly') {
3714: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3715: my $curritems = &Apache::lonnet::thaw_unescape($key);
3716: if (ref($curritems) ne 'HASH') {
3717: my @current_items = split(/:/,$hashref->{$key},-1);
3718: my $lasttime = pop(@current_items);
3719: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3720: } else {
3721: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3722: }
3723: }
3724: $hashref->{$key} = $value;
3725: }
3726: if ($mode ne 'notime') {
3727: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3728: }
3729: }
3730: if (&untie_domain_hash($hashref)) {
3731: &Reply($client, "ok\n", $userinput);
3732: } else {
3733: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3734: "while attempting courseidputhash\n", $userinput);
3735: }
3736: } else {
3737: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3738: "while attempting courseidputhash\n", $userinput);
3739: }
3740: return 1;
3741: }
3742: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3743:
3744: # Retrieves the value of a course id resource keyword pattern
3745: # defined since a starting date. Both the starting date and the
3746: # keyword pattern are optional. If the starting date is not supplied it
3747: # is treated as the beginning of time. If the pattern is not found,
3748: # it is treatred as "." matching everything.
3749: #
3750: # Parameters:
3751: # $cmd - Command keyword that resulted in us being dispatched.
3752: # $tail - The remainder of the command that, in this case, consists
3753: # of a colon separated list of:
3754: # domain - The domain in which the course database is
3755: # defined.
3756: # since - Optional parameter describing the minimum
3757: # time of definition(?) of the resources that
3758: # will match the dump.
3759: # description - regular expression that is used to filter
3760: # the dump. Only keywords matching this regexp
3761: # will be used.
3762: # institutional code - optional supplied code to filter
3763: # the dump. Only courses with an institutional code
3764: # that match the supplied code will be returned.
3765: # owner - optional supplied username and domain of owner to
3766: # filter the dump. Only courses for which the course
3767: # owner matches the supplied username and/or domain
3768: # will be returned. Pre-2.2.0 legacy entries from
3769: # nohist_courseiddump will only contain usernames.
3770: # type - optional parameter for selection
3771: # regexp_ok - if 1 or -1 allow the supplied institutional code
3772: # filter to behave as a regular expression:
3773: # 1 will not exclude the course if the instcode matches the RE
3774: # -1 will exclude the course if the instcode matches the RE
3775: # rtn_as_hash - whether to return the information available for
3776: # each matched item as a frozen hash of all
3777: # key, value pairs in the item's hash, or as a
3778: # colon-separated list of (in order) description,
3779: # institutional code, and course owner.
3780: # selfenrollonly - filter by courses allowing self-enrollment
3781: # now or in the future (selfenrollonly = 1).
3782: # catfilter - filter by course category, assigned to a course
3783: # using manually defined categories (i.e., not
3784: # self-cataloging based on on institutional code).
3785: # showhidden - include course in results even if course
3786: # was set to be excluded from course catalog (DC only).
3787: # caller - if set to 'coursecatalog', courses set to be hidden
3788: # from course catalog will be excluded from results (unless
3789: # overridden by "showhidden".
3790: # cloner - escaped username:domain of course cloner (if picking course to
3791: # clone).
3792: # cc_clone_list - escaped comma separated list of courses for which
3793: # course cloner has active CC role (and so can clone
3794: # automatically).
3795: # cloneonly - filter by courses for which cloner has rights to clone.
3796: # createdbefore - include courses for which creation date preceeded this date.
3797: # createdafter - include courses for which creation date followed this date.
3798: # creationcontext - include courses created in specified context
3799: #
3800: # domcloner - flag to indicate if user can create CCs in course's domain.
3801: # If so, ability to clone course is automatic.
3802: #
3803: # $client - The socket open on the client.
3804: # Returns:
3805: # 1 - Continue processing.
3806: # Side Effects:
3807: # a reply is written to $client.
3808: sub dump_course_id_handler {
3809: my ($cmd, $tail, $client) = @_;
3810: my $userinput = "$cmd:$tail";
3811:
3812: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3813: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
3814: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
3815: $creationcontext,$domcloner) =split(/:/,$tail);
3816: my $now = time;
3817: my ($cloneruname,$clonerudom,%cc_clone);
3818: if (defined($description)) {
3819: $description=&unescape($description);
3820: } else {
3821: $description='.';
3822: }
3823: if (defined($instcodefilter)) {
3824: $instcodefilter=&unescape($instcodefilter);
3825: } else {
3826: $instcodefilter='.';
3827: }
3828: my ($ownerunamefilter,$ownerdomfilter);
3829: if (defined($ownerfilter)) {
3830: $ownerfilter=&unescape($ownerfilter);
3831: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3832: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3833: $ownerunamefilter = $1;
3834: $ownerdomfilter = $2;
3835: } else {
3836: $ownerunamefilter = $ownerfilter;
3837: $ownerdomfilter = '';
3838: }
3839: }
3840: } else {
3841: $ownerfilter='.';
3842: }
3843:
3844: if (defined($coursefilter)) {
3845: $coursefilter=&unescape($coursefilter);
3846: } else {
3847: $coursefilter='.';
3848: }
3849: if (defined($typefilter)) {
3850: $typefilter=&unescape($typefilter);
3851: } else {
3852: $typefilter='.';
3853: }
3854: if (defined($regexp_ok)) {
3855: $regexp_ok=&unescape($regexp_ok);
3856: }
3857: if (defined($catfilter)) {
3858: $catfilter=&unescape($catfilter);
3859: }
3860: if (defined($cloner)) {
3861: $cloner = &unescape($cloner);
3862: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
3863: }
3864: if (defined($cc_clone_list)) {
3865: $cc_clone_list = &unescape($cc_clone_list);
3866: my @cc_cloners = split('&',$cc_clone_list);
3867: foreach my $cid (@cc_cloners) {
3868: my ($clonedom,$clonenum) = split(':',$cid);
3869: next if ($clonedom ne $udom);
3870: $cc_clone{$clonedom.'_'.$clonenum} = 1;
3871: }
3872: }
3873: if ($createdbefore ne '') {
3874: $createdbefore = &unescape($createdbefore);
3875: } else {
3876: $createdbefore = 0;
3877: }
3878: if ($createdafter ne '') {
3879: $createdafter = &unescape($createdafter);
3880: } else {
3881: $createdafter = 0;
3882: }
3883: if ($creationcontext ne '') {
3884: $creationcontext = &unescape($creationcontext);
3885: } else {
3886: $creationcontext = '.';
3887: }
3888: my $unpack = 1;
3889: if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&
3890: $typefilter eq '.') {
3891: $unpack = 0;
3892: }
3893: if (!defined($since)) { $since=0; }
3894: my $qresult='';
3895: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3896: if ($hashref) {
3897: while (my ($key,$value) = each(%$hashref)) {
3898: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
3899: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
3900: $context);
3901: $unesc_key = &unescape($key);
3902: if ($unesc_key =~ /^lasttime:/) {
3903: next;
3904: } else {
3905: $lasttime_key = &escape('lasttime:'.$unesc_key);
3906: }
3907: if ($hashref->{$lasttime_key} ne '') {
3908: $lasttime = $hashref->{$lasttime_key};
3909: next if ($lasttime<$since);
3910: }
3911: my ($canclone,$valchange);
3912: my $items = &Apache::lonnet::thaw_unescape($value);
3913: if (ref($items) eq 'HASH') {
3914: if ($hashref->{$lasttime_key} eq '') {
3915: next if ($since > 1);
3916: }
3917: $is_hash = 1;
3918: if ($domcloner) {
3919: $canclone = 1;
3920: } elsif (defined($clonerudom)) {
3921: if ($items->{'cloners'}) {
3922: my @cloneable = split(',',$items->{'cloners'});
3923: if (@cloneable) {
3924: if (grep(/^\*$/,@cloneable)) {
3925: $canclone = 1;
3926: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
3927: $canclone = 1;
3928: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
3929: $canclone = 1;
3930: }
3931: }
3932: unless ($canclone) {
3933: if ($cloneruname ne '' && $clonerudom ne '') {
3934: if ($cc_clone{$unesc_key}) {
3935: $canclone = 1;
3936: $items->{'cloners'} .= ','.$cloneruname.':'.
3937: $clonerudom;
3938: $valchange = 1;
3939: }
3940: }
3941: }
3942: } elsif (defined($cloneruname)) {
3943: if ($cc_clone{$unesc_key}) {
3944: $canclone = 1;
3945: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3946: $valchange = 1;
3947: }
3948: unless ($canclone) {
3949: if ($items->{'owner'} =~ /:/) {
3950: if ($items->{'owner'} eq $cloner) {
3951: $canclone = 1;
3952: }
3953: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
3954: $canclone = 1;
3955: }
3956: if ($canclone) {
3957: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3958: $valchange = 1;
3959: }
3960: }
3961: }
3962: }
3963: if ($unpack || !$rtn_as_hash) {
3964: $unesc_val{'descr'} = $items->{'description'};
3965: $unesc_val{'inst_code'} = $items->{'inst_code'};
3966: $unesc_val{'owner'} = $items->{'owner'};
3967: $unesc_val{'type'} = $items->{'type'};
3968: $unesc_val{'cloners'} = $items->{'cloners'};
3969: $unesc_val{'created'} = $items->{'created'};
3970: $unesc_val{'context'} = $items->{'context'};
3971: }
3972: $selfenroll_types = $items->{'selfenroll_types'};
3973: $selfenroll_end = $items->{'selfenroll_end_date'};
3974: $created = $items->{'created'};
3975: $context = $items->{'context'};
3976: if ($selfenrollonly) {
3977: next if (!$selfenroll_types);
3978: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
3979: next;
3980: }
3981: }
3982: if ($creationcontext ne '.') {
3983: next if (($context ne '') && ($context ne $creationcontext));
3984: }
3985: if ($createdbefore > 0) {
3986: next if (($created eq '') || ($created > $createdbefore));
3987: }
3988: if ($createdafter > 0) {
3989: next if (($created eq '') || ($created <= $createdafter));
3990: }
3991: if ($catfilter ne '') {
3992: next if ($items->{'categories'} eq '');
3993: my @categories = split('&',$items->{'categories'});
3994: next if (@categories == 0);
3995: my @subcats = split('&',$catfilter);
3996: my $matchcat = 0;
3997: foreach my $cat (@categories) {
3998: if (grep(/^\Q$cat\E$/,@subcats)) {
3999: $matchcat = 1;
4000: last;
4001: }
4002: }
4003: next if (!$matchcat);
4004: }
4005: if ($caller eq 'coursecatalog') {
4006: if ($items->{'hidefromcat'} eq 'yes') {
4007: next if !$showhidden;
4008: }
4009: }
4010: } else {
4011: next if ($catfilter ne '');
4012: next if ($selfenrollonly);
4013: next if ($createdbefore || $createdafter);
4014: next if ($creationcontext ne '.');
4015: if ((defined($clonerudom)) && (defined($cloneruname))) {
4016: if ($cc_clone{$unesc_key}) {
4017: $canclone = 1;
4018: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4019: }
4020: }
4021: $is_hash = 0;
4022: my @courseitems = split(/:/,$value);
4023: $lasttime = pop(@courseitems);
4024: if ($hashref->{$lasttime_key} eq '') {
4025: next if ($lasttime<$since);
4026: }
4027: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4028: }
4029: if ($cloneonly) {
4030: next unless ($canclone);
4031: }
4032: my $match = 1;
4033: if ($description ne '.') {
4034: if (!$is_hash) {
4035: $unesc_val{'descr'} = &unescape($val{'descr'});
4036: }
4037: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4038: $match = 0;
4039: }
4040: }
4041: if ($instcodefilter ne '.') {
4042: if (!$is_hash) {
4043: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4044: }
4045: if ($regexp_ok == 1) {
4046: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4047: $match = 0;
4048: }
4049: } elsif ($regexp_ok == -1) {
4050: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4051: $match = 0;
4052: }
4053: } else {
4054: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4055: $match = 0;
4056: }
4057: }
4058: }
4059: if ($ownerfilter ne '.') {
4060: if (!$is_hash) {
4061: $unesc_val{'owner'} = &unescape($val{'owner'});
4062: }
4063: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4064: if ($unesc_val{'owner'} =~ /:/) {
4065: if (eval{$unesc_val{'owner'} !~
4066: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4067: $match = 0;
4068: }
4069: } else {
4070: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4071: $match = 0;
4072: }
4073: }
4074: } elsif ($ownerunamefilter ne '') {
4075: if ($unesc_val{'owner'} =~ /:/) {
4076: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4077: $match = 0;
4078: }
4079: } else {
4080: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4081: $match = 0;
4082: }
4083: }
4084: } elsif ($ownerdomfilter ne '') {
4085: if ($unesc_val{'owner'} =~ /:/) {
4086: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4087: $match = 0;
4088: }
4089: } else {
4090: if ($ownerdomfilter ne $udom) {
4091: $match = 0;
4092: }
4093: }
4094: }
4095: }
4096: if ($coursefilter ne '.') {
4097: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4098: $match = 0;
4099: }
4100: }
4101: if ($typefilter ne '.') {
4102: if (!$is_hash) {
4103: $unesc_val{'type'} = &unescape($val{'type'});
4104: }
4105: if ($unesc_val{'type'} eq '') {
4106: if ($typefilter ne 'Course') {
4107: $match = 0;
4108: }
4109: } else {
4110: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4111: $match = 0;
4112: }
4113: }
4114: }
4115: if ($match == 1) {
4116: if ($rtn_as_hash) {
4117: if ($is_hash) {
4118: if ($valchange) {
4119: my $newvalue = &Apache::lonnet::freeze_escape($items);
4120: $qresult.=$key.'='.$newvalue.'&';
4121: } else {
4122: $qresult.=$key.'='.$value.'&';
4123: }
4124: } else {
4125: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4126: 'inst_code' => &unescape($val{'inst_code'}),
4127: 'owner' => &unescape($val{'owner'}),
4128: 'type' => &unescape($val{'type'}),
4129: 'cloners' => &unescape($val{'cloners'}),
4130: );
4131: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4132: $qresult.=$key.'='.$items.'&';
4133: }
4134: } else {
4135: if ($is_hash) {
4136: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4137: &escape($unesc_val{'inst_code'}).':'.
4138: &escape($unesc_val{'owner'}).'&';
4139: } else {
4140: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4141: ':'.$val{'owner'}.'&';
4142: }
4143: }
4144: }
4145: }
4146: if (&untie_domain_hash($hashref)) {
4147: chop($qresult);
4148: &Reply($client, \$qresult, $userinput);
4149: } else {
4150: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4151: "while attempting courseiddump\n", $userinput);
4152: }
4153: } else {
4154: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4155: "while attempting courseiddump\n", $userinput);
4156: }
4157: return 1;
4158: }
4159: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4160:
4161: sub course_lastaccess_handler {
4162: my ($cmd, $tail, $client) = @_;
4163: my $userinput = "$cmd:$tail";
4164: my ($cdom,$cnum) = split(':',$tail);
4165: my (%lastaccess,$qresult);
4166: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4167: if ($hashref) {
4168: while (my ($key,$value) = each(%$hashref)) {
4169: my ($unesc_key,$lasttime);
4170: $unesc_key = &unescape($key);
4171: if ($cnum) {
4172: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4173: }
4174: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4175: $lastaccess{$1} = $value;
4176: } else {
4177: my $items = &Apache::lonnet::thaw_unescape($value);
4178: if (ref($items) eq 'HASH') {
4179: unless ($lastaccess{$unesc_key}) {
4180: $lastaccess{$unesc_key} = '';
4181: }
4182: } else {
4183: my @courseitems = split(':',$value);
4184: $lastaccess{$unesc_key} = pop(@courseitems);
4185: }
4186: }
4187: }
4188: foreach my $cid (sort(keys(%lastaccess))) {
4189: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4190: }
4191: if (&untie_domain_hash($hashref)) {
4192: if ($qresult) {
4193: chop($qresult);
4194: }
4195: &Reply($client, \$qresult, $userinput);
4196: } else {
4197: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4198: "while attempting lastacourseaccess\n", $userinput);
4199: }
4200: } else {
4201: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4202: "while attempting lastcourseaccess\n", $userinput);
4203: }
4204: return 1;
4205: }
4206: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4207:
4208: #
4209: # Puts an unencrypted entry in a namespace db file at the domain level
4210: #
4211: # Parameters:
4212: # $cmd - The command that got us here.
4213: # $tail - Tail of the command (remaining parameters).
4214: # $client - File descriptor connected to client.
4215: # Returns
4216: # 0 - Requested to exit, caller should shut down.
4217: # 1 - Continue processing.
4218: # Side effects:
4219: # reply is written to $client.
4220: #
4221: sub put_domain_handler {
4222: my ($cmd,$tail,$client) = @_;
4223:
4224: my $userinput = "$cmd:$tail";
4225:
4226: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4227: chomp($what);
4228: my @pairs=split(/\&/,$what);
4229: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4230: "P", $what);
4231: if ($hashref) {
4232: foreach my $pair (@pairs) {
4233: my ($key,$value)=split(/=/,$pair);
4234: $hashref->{$key}=$value;
4235: }
4236: if (&untie_domain_hash($hashref)) {
4237: &Reply($client, "ok\n", $userinput);
4238: } else {
4239: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4240: "while attempting putdom\n", $userinput);
4241: }
4242: } else {
4243: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4244: "while attempting putdom\n", $userinput);
4245: }
4246:
4247: return 1;
4248: }
4249: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4250:
4251: # Unencrypted get from the namespace database file at the domain level.
4252: # This function retrieves a keyed item from a specific named database in the
4253: # domain directory.
4254: #
4255: # Parameters:
4256: # $cmd - Command request keyword (get).
4257: # $tail - Tail of the command. This is a colon separated list
4258: # consisting of the domain and the 'namespace'
4259: # which selects the gdbm file to do the lookup in,
4260: # & separated list of keys to lookup. Note that
4261: # the values are returned as an & separated list too.
4262: # $client - File descriptor open on the client.
4263: # Returns:
4264: # 1 - Continue processing.
4265: # 0 - Exit.
4266: # Side effects:
4267: # reply is written to $client.
4268: #
4269:
4270: sub get_domain_handler {
4271: my ($cmd, $tail, $client) = @_;
4272:
4273: my $userinput = "$client:$tail";
4274:
4275: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4276: chomp($what);
4277: my @queries=split(/\&/,$what);
4278: my $qresult='';
4279: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4280: if ($hashref) {
4281: for (my $i=0;$i<=$#queries;$i++) {
4282: $qresult.="$hashref->{$queries[$i]}&";
4283: }
4284: if (&untie_domain_hash($hashref)) {
4285: $qresult=~s/\&$//;
4286: &Reply($client, \$qresult, $userinput);
4287: } else {
4288: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4289: "while attempting getdom\n",$userinput);
4290: }
4291: } else {
4292: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4293: "while attempting getdom\n",$userinput);
4294: }
4295:
4296: return 1;
4297: }
4298: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4299:
4300: #
4301: # Puts an id to a domains id database.
4302: #
4303: # Parameters:
4304: # $cmd - The command that triggered us.
4305: # $tail - Remainder of the request other than the command. This is a
4306: # colon separated list containing:
4307: # $domain - The domain for which we are writing the id.
4308: # $pairs - The id info to write... this is and & separated list
4309: # of keyword=value.
4310: # $client - Socket open on the client.
4311: # Returns:
4312: # 1 - Continue processing.
4313: # Side effects:
4314: # reply is written to $client.
4315: #
4316: sub put_id_handler {
4317: my ($cmd,$tail,$client) = @_;
4318:
4319:
4320: my $userinput = "$cmd:$tail";
4321:
4322: my ($udom,$what)=split(/:/,$tail);
4323: chomp($what);
4324: my @pairs=split(/\&/,$what);
4325: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4326: "P", $what);
4327: if ($hashref) {
4328: foreach my $pair (@pairs) {
4329: my ($key,$value)=split(/=/,$pair);
4330: $hashref->{$key}=$value;
4331: }
4332: if (&untie_domain_hash($hashref)) {
4333: &Reply($client, "ok\n", $userinput);
4334: } else {
4335: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4336: "while attempting idput\n", $userinput);
4337: }
4338: } else {
4339: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4340: "while attempting idput\n", $userinput);
4341: }
4342:
4343: return 1;
4344: }
4345: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4346:
4347: #
4348: # Retrieves a set of id values from the id database.
4349: # Returns an & separated list of results, one for each requested id to the
4350: # client.
4351: #
4352: # Parameters:
4353: # $cmd - Command keyword that caused us to be dispatched.
4354: # $tail - Tail of the command. Consists of a colon separated:
4355: # domain - the domain whose id table we dump
4356: # ids Consists of an & separated list of
4357: # id keywords whose values will be fetched.
4358: # nonexisting keywords will have an empty value.
4359: # $client - Socket open on the client.
4360: #
4361: # Returns:
4362: # 1 - indicating processing should continue.
4363: # Side effects:
4364: # An & separated list of results is written to $client.
4365: #
4366: sub get_id_handler {
4367: my ($cmd, $tail, $client) = @_;
4368:
4369:
4370: my $userinput = "$client:$tail";
4371:
4372: my ($udom,$what)=split(/:/,$tail);
4373: chomp($what);
4374: my @queries=split(/\&/,$what);
4375: my $qresult='';
4376: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4377: if ($hashref) {
4378: for (my $i=0;$i<=$#queries;$i++) {
4379: $qresult.="$hashref->{$queries[$i]}&";
4380: }
4381: if (&untie_domain_hash($hashref)) {
4382: $qresult=~s/\&$//;
4383: &Reply($client, \$qresult, $userinput);
4384: } else {
4385: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4386: "while attempting idget\n",$userinput);
4387: }
4388: } else {
4389: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4390: "while attempting idget\n",$userinput);
4391: }
4392:
4393: return 1;
4394: }
4395: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4396:
4397: #
4398: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4399: #
4400: # Parameters
4401: # $cmd - Command keyword that caused us to be dispatched.
4402: # $tail - Tail of the command. Consists of a colon separated:
4403: # domain - the domain whose dcmail we are recording
4404: # email Consists of key=value pair
4405: # where key is unique msgid
4406: # and value is message (in XML)
4407: # $client - Socket open on the client.
4408: #
4409: # Returns:
4410: # 1 - indicating processing should continue.
4411: # Side effects
4412: # reply is written to $client.
4413: #
4414: sub put_dcmail_handler {
4415: my ($cmd,$tail,$client) = @_;
4416: my $userinput = "$cmd:$tail";
4417:
4418: my ($udom,$what)=split(/:/,$tail);
4419: chomp($what);
4420: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4421: if ($hashref) {
4422: my ($key,$value)=split(/=/,$what);
4423: $hashref->{$key}=$value;
4424: }
4425: if (&untie_domain_hash($hashref)) {
4426: &Reply($client, "ok\n", $userinput);
4427: } else {
4428: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4429: "while attempting dcmailput\n", $userinput);
4430: }
4431: return 1;
4432: }
4433: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4434:
4435: #
4436: # Retrieves broadcast e-mail from nohist_dcmail database
4437: # Returns to client an & separated list of key=value pairs,
4438: # where key is msgid and value is message information.
4439: #
4440: # Parameters
4441: # $cmd - Command keyword that caused us to be dispatched.
4442: # $tail - Tail of the command. Consists of a colon separated:
4443: # domain - the domain whose dcmail table we dump
4444: # startfilter - beginning of time window
4445: # endfilter - end of time window
4446: # sendersfilter - & separated list of username:domain
4447: # for senders to search for.
4448: # $client - Socket open on the client.
4449: #
4450: # Returns:
4451: # 1 - indicating processing should continue.
4452: # Side effects
4453: # reply (& separated list of msgid=messageinfo pairs) is
4454: # written to $client.
4455: #
4456: sub dump_dcmail_handler {
4457: my ($cmd, $tail, $client) = @_;
4458:
4459: my $userinput = "$cmd:$tail";
4460: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4461: chomp($sendersfilter);
4462: my @senders = ();
4463: if (defined($startfilter)) {
4464: $startfilter=&unescape($startfilter);
4465: } else {
4466: $startfilter='.';
4467: }
4468: if (defined($endfilter)) {
4469: $endfilter=&unescape($endfilter);
4470: } else {
4471: $endfilter='.';
4472: }
4473: if (defined($sendersfilter)) {
4474: $sendersfilter=&unescape($sendersfilter);
4475: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
4476: }
4477:
4478: my $qresult='';
4479: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4480: if ($hashref) {
4481: while (my ($key,$value) = each(%$hashref)) {
4482: my $match = 1;
4483: my ($timestamp,$subj,$uname,$udom) =
4484: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
4485: $subj = &unescape($subj);
4486: unless ($startfilter eq '.' || !defined($startfilter)) {
4487: if ($timestamp < $startfilter) {
4488: $match = 0;
4489: }
4490: }
4491: unless ($endfilter eq '.' || !defined($endfilter)) {
4492: if ($timestamp > $endfilter) {
4493: $match = 0;
4494: }
4495: }
4496: unless (@senders < 1) {
4497: unless (grep/^$uname:$udom$/,@senders) {
4498: $match = 0;
4499: }
4500: }
4501: if ($match == 1) {
4502: $qresult.=$key.'='.$value.'&';
4503: }
4504: }
4505: if (&untie_domain_hash($hashref)) {
4506: chop($qresult);
4507: &Reply($client, \$qresult, $userinput);
4508: } else {
4509: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4510: "while attempting dcmaildump\n", $userinput);
4511: }
4512: } else {
4513: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4514: "while attempting dcmaildump\n", $userinput);
4515: }
4516: return 1;
4517: }
4518:
4519: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4520:
4521: #
4522: # Puts domain roles in nohist_domainroles database
4523: #
4524: # Parameters
4525: # $cmd - Command keyword that caused us to be dispatched.
4526: # $tail - Tail of the command. Consists of a colon separated:
4527: # domain - the domain whose roles we are recording
4528: # role - Consists of key=value pair
4529: # where key is unique role
4530: # and value is start/end date information
4531: # $client - Socket open on the client.
4532: #
4533: # Returns:
4534: # 1 - indicating processing should continue.
4535: # Side effects
4536: # reply is written to $client.
4537: #
4538:
4539: sub put_domainroles_handler {
4540: my ($cmd,$tail,$client) = @_;
4541:
4542: my $userinput = "$cmd:$tail";
4543: my ($udom,$what)=split(/:/,$tail);
4544: chomp($what);
4545: my @pairs=split(/\&/,$what);
4546: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4547: if ($hashref) {
4548: foreach my $pair (@pairs) {
4549: my ($key,$value)=split(/=/,$pair);
4550: $hashref->{$key}=$value;
4551: }
4552: if (&untie_domain_hash($hashref)) {
4553: &Reply($client, "ok\n", $userinput);
4554: } else {
4555: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4556: "while attempting domroleput\n", $userinput);
4557: }
4558: } else {
4559: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4560: "while attempting domroleput\n", $userinput);
4561: }
4562:
4563: return 1;
4564: }
4565:
4566: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4567:
4568: #
4569: # Retrieves domain roles from nohist_domainroles database
4570: # Returns to client an & separated list of key=value pairs,
4571: # where key is role and value is start and end date information.
4572: #
4573: # Parameters
4574: # $cmd - Command keyword that caused us to be dispatched.
4575: # $tail - Tail of the command. Consists of a colon separated:
4576: # domain - the domain whose domain roles table we dump
4577: # $client - Socket open on the client.
4578: #
4579: # Returns:
4580: # 1 - indicating processing should continue.
4581: # Side effects
4582: # reply (& separated list of role=start/end info pairs) is
4583: # written to $client.
4584: #
4585: sub dump_domainroles_handler {
4586: my ($cmd, $tail, $client) = @_;
4587:
4588: my $userinput = "$cmd:$tail";
4589: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4590: chomp($rolesfilter);
4591: my @roles = ();
4592: if (defined($startfilter)) {
4593: $startfilter=&unescape($startfilter);
4594: } else {
4595: $startfilter='.';
4596: }
4597: if (defined($endfilter)) {
4598: $endfilter=&unescape($endfilter);
4599: } else {
4600: $endfilter='.';
4601: }
4602: if (defined($rolesfilter)) {
4603: $rolesfilter=&unescape($rolesfilter);
4604: @roles = split(/\&/,$rolesfilter);
4605: }
4606:
4607: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4608: if ($hashref) {
4609: my $qresult = '';
4610: while (my ($key,$value) = each(%$hashref)) {
4611: my $match = 1;
4612: my ($end,$start) = split(/:/,&unescape($value));
4613: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
4614: unless (@roles < 1) {
4615: unless (grep/^\Q$trole\E$/,@roles) {
4616: $match = 0;
4617: next;
4618: }
4619: }
4620: unless ($startfilter eq '.' || !defined($startfilter)) {
4621: if ((defined($start)) && ($start >= $startfilter)) {
4622: $match = 0;
4623: next;
4624: }
4625: }
4626: unless ($endfilter eq '.' || !defined($endfilter)) {
4627: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
4628: $match = 0;
4629: next;
4630: }
4631: }
4632: if ($match == 1) {
4633: $qresult.=$key.'='.$value.'&';
4634: }
4635: }
4636: if (&untie_domain_hash($hashref)) {
4637: chop($qresult);
4638: &Reply($client, \$qresult, $userinput);
4639: } else {
4640: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4641: "while attempting domrolesdump\n", $userinput);
4642: }
4643: } else {
4644: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4645: "while attempting domrolesdump\n", $userinput);
4646: }
4647: return 1;
4648: }
4649:
4650: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4651:
4652:
4653: # Process the tmpput command I'm not sure what this does.. Seems to
4654: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4655: # where Id is the client's ip concatenated with a sequence number.
4656: # The file will contain some value that is passed in. Is this e.g.
4657: # a login token?
4658: #
4659: # Parameters:
4660: # $cmd - The command that got us dispatched.
4661: # $tail - The remainder of the request following $cmd:
4662: # In this case this will be the contents of the file.
4663: # $client - Socket connected to the client.
4664: # Returns:
4665: # 1 indicating processing can continue.
4666: # Side effects:
4667: # A file is created in the local filesystem.
4668: # A reply is sent to the client.
4669: sub tmp_put_handler {
4670: my ($cmd, $what, $client) = @_;
4671:
4672: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4673:
4674: my ($record,$context) = split(/:/,$what);
4675: if ($context ne '') {
4676: chomp($context);
4677: $context = &unescape($context);
4678: }
4679: my ($id,$store);
4680: $tmpsnum++;
4681: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
4682: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4683: } else {
4684: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4685: }
4686: $id=~s/\W/\_/g;
4687: $record=~s/\n//g;
4688: my $execdir=$perlvar{'lonDaemons'};
4689: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
4690: print $store $record;
4691: close $store;
4692: &Reply($client, \$id, $userinput);
4693: } else {
4694: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4695: "while attempting tmpput\n", $userinput);
4696: }
4697: return 1;
4698:
4699: }
4700: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
4701:
4702: # Processes the tmpget command. This command returns the contents
4703: # of a temporary resource file(?) created via tmpput.
4704: #
4705: # Paramters:
4706: # $cmd - Command that got us dispatched.
4707: # $id - Tail of the command, contain the id of the resource
4708: # we want to fetch.
4709: # $client - socket open on the client.
4710: # Return:
4711: # 1 - Inidcating processing can continue.
4712: # Side effects:
4713: # A reply is sent to the client.
4714: #
4715: sub tmp_get_handler {
4716: my ($cmd, $id, $client) = @_;
4717:
4718: my $userinput = "$cmd:$id";
4719:
4720:
4721: $id=~s/\W/\_/g;
4722: my $store;
4723: my $execdir=$perlvar{'lonDaemons'};
4724: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4725: my $reply=<$store>;
4726: &Reply( $client, \$reply, $userinput);
4727: close $store;
4728: } else {
4729: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4730: "while attempting tmpget\n", $userinput);
4731: }
4732:
4733: return 1;
4734: }
4735: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
4736:
4737: #
4738: # Process the tmpdel command. This command deletes a temp resource
4739: # created by the tmpput command.
4740: #
4741: # Parameters:
4742: # $cmd - Command that got us here.
4743: # $id - Id of the temporary resource created.
4744: # $client - socket open on the client process.
4745: #
4746: # Returns:
4747: # 1 - Indicating processing should continue.
4748: # Side Effects:
4749: # A file is deleted
4750: # A reply is sent to the client.
4751: sub tmp_del_handler {
4752: my ($cmd, $id, $client) = @_;
4753:
4754: my $userinput= "$cmd:$id";
4755:
4756: chomp($id);
4757: $id=~s/\W/\_/g;
4758: my $execdir=$perlvar{'lonDaemons'};
4759: if (unlink("$execdir/tmp/$id.tmp")) {
4760: &Reply($client, "ok\n", $userinput);
4761: } else {
4762: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4763: "while attempting tmpdel\n", $userinput);
4764: }
4765:
4766: return 1;
4767:
4768: }
4769: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
4770:
4771: #
4772: # Processes the setannounce command. This command
4773: # creates a file named announce.txt in the top directory of
4774: # the documentn root and sets its contents. The announce.txt file is
4775: # printed in its entirety at the LonCAPA login page. Note:
4776: # once the announcement.txt fileis created it cannot be deleted.
4777: # However, setting the contents of the file to empty removes the
4778: # announcement from the login page of loncapa so who cares.
4779: #
4780: # Parameters:
4781: # $cmd - The command that got us dispatched.
4782: # $announcement - The text of the announcement.
4783: # $client - Socket open on the client process.
4784: # Retunrns:
4785: # 1 - Indicating request processing should continue
4786: # Side Effects:
4787: # The file {DocRoot}/announcement.txt is created.
4788: # A reply is sent to $client.
4789: #
4790: sub set_announce_handler {
4791: my ($cmd, $announcement, $client) = @_;
4792:
4793: my $userinput = "$cmd:$announcement";
4794:
4795: chomp($announcement);
4796: $announcement=&unescape($announcement);
4797: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4798: '/announcement.txt')) {
4799: print $store $announcement;
4800: close $store;
4801: &Reply($client, "ok\n", $userinput);
4802: } else {
4803: &Failure($client, "error: ".($!+0)."\n", $userinput);
4804: }
4805:
4806: return 1;
4807: }
4808: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
4809:
4810: #
4811: # Return the version of the daemon. This can be used to determine
4812: # the compatibility of cross version installations or, alternatively to
4813: # simply know who's out of date and who isn't. Note that the version
4814: # is returned concatenated with the tail.
4815: # Parameters:
4816: # $cmd - the request that dispatched to us.
4817: # $tail - Tail of the request (client's version?).
4818: # $client - Socket open on the client.
4819: #Returns:
4820: # 1 - continue processing requests.
4821: # Side Effects:
4822: # Replies with version to $client.
4823: sub get_version_handler {
4824: my ($cmd, $tail, $client) = @_;
4825:
4826: my $userinput = $cmd.$tail;
4827:
4828: &Reply($client, &version($userinput)."\n", $userinput);
4829:
4830:
4831: return 1;
4832: }
4833: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
4834:
4835: # Set the current host and domain. This is used to support
4836: # multihomed systems. Each IP of the system, or even separate daemons
4837: # on the same IP can be treated as handling a separate lonCAPA virtual
4838: # machine. This command selects the virtual lonCAPA. The client always
4839: # knows the right one since it is lonc and it is selecting the domain/system
4840: # from the hosts.tab file.
4841: # Parameters:
4842: # $cmd - Command that dispatched us.
4843: # $tail - Tail of the command (domain/host requested).
4844: # $socket - Socket open on the client.
4845: #
4846: # Returns:
4847: # 1 - Indicates the program should continue to process requests.
4848: # Side-effects:
4849: # The default domain/system context is modified for this daemon.
4850: # a reply is sent to the client.
4851: #
4852: sub set_virtual_host_handler {
4853: my ($cmd, $tail, $socket) = @_;
4854:
4855: my $userinput ="$cmd:$tail";
4856:
4857: &Reply($client, &sethost($userinput)."\n", $userinput);
4858:
4859:
4860: return 1;
4861: }
4862: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
4863:
4864: # Process a request to exit:
4865: # - "bye" is sent to the client.
4866: # - The client socket is shutdown and closed.
4867: # - We indicate to the caller that we should exit.
4868: # Formal Parameters:
4869: # $cmd - The command that got us here.
4870: # $tail - Tail of the command (empty).
4871: # $client - Socket open on the tail.
4872: # Returns:
4873: # 0 - Indicating the program should exit!!
4874: #
4875: sub exit_handler {
4876: my ($cmd, $tail, $client) = @_;
4877:
4878: my $userinput = "$cmd:$tail";
4879:
4880: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4881: &Reply($client, "bye\n", $userinput);
4882: $client->shutdown(2); # shutdown the socket forcibly.
4883: $client->close();
4884:
4885: return 0;
4886: }
4887: ®ister_handler("exit", \&exit_handler, 0,1,1);
4888: ®ister_handler("init", \&exit_handler, 0,1,1);
4889: ®ister_handler("quit", \&exit_handler, 0,1,1);
4890:
4891: # Determine if auto-enrollment is enabled.
4892: # Note that the original had what I believe to be a defect.
4893: # The original returned 0 if the requestor was not a registerd client.
4894: # It should return "refused".
4895: # Formal Parameters:
4896: # $cmd - The command that invoked us.
4897: # $tail - The tail of the command (Extra command parameters.
4898: # $client - The socket open on the client that issued the request.
4899: # Returns:
4900: # 1 - Indicating processing should continue.
4901: #
4902: sub enrollment_enabled_handler {
4903: my ($cmd, $tail, $client) = @_;
4904: my $userinput = $cmd.":".$tail; # For logging purposes.
4905:
4906:
4907: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4908:
4909: my $outcome = &localenroll::run($cdom);
4910: &Reply($client, \$outcome, $userinput);
4911:
4912: return 1;
4913: }
4914: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4915:
4916: #
4917: # Validate an institutional code used for a LON-CAPA course.
4918: #
4919: # Formal Parameters:
4920: # $cmd - The command request that got us dispatched.
4921: # $tail - The tail of the command. In this case,
4922: # this is a colon separated set of words that will be split
4923: # into:
4924: # $dom - The domain for which the check of
4925: # institutional course code will occur.
4926: #
4927: # $instcode - The institutional code for the course
4928: # being requested, or validated for rights
4929: # to request.
4930: #
4931: # $owner - The course requestor (who will be the
4932: # course owner, in the form username:domain
4933: #
4934: # $client - Socket open on the client.
4935: # Returns:
4936: # 1 - Indicating processing should continue.
4937: #
4938: sub validate_instcode_handler {
4939: my ($cmd, $tail, $client) = @_;
4940: my $userinput = "$cmd:$tail";
4941: my ($dom,$instcode,$owner) = split(/:/, $tail);
4942: $instcode = &unescape($instcode);
4943: $owner = &unescape($owner);
4944: my ($outcome,$description) =
4945: &localenroll::validate_instcode($dom,$instcode,$owner);
4946: my $result = &escape($outcome).'&'.&escape($description);
4947: &Reply($client, \$result, $userinput);
4948:
4949: return 1;
4950: }
4951: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
4952:
4953: # Get the official sections for which auto-enrollment is possible.
4954: # Since the admin people won't know about 'unofficial sections'
4955: # we cannot auto-enroll on them.
4956: # Formal Parameters:
4957: # $cmd - The command request that got us dispatched here.
4958: # $tail - The remainder of the request. In our case this
4959: # will be split into:
4960: # $coursecode - The course name from the admin point of view.
4961: # $cdom - The course's domain(?).
4962: # $client - Socket open on the client.
4963: # Returns:
4964: # 1 - Indiciting processing should continue.
4965: #
4966: sub get_sections_handler {
4967: my ($cmd, $tail, $client) = @_;
4968: my $userinput = "$cmd:$tail";
4969:
4970: my ($coursecode, $cdom) = split(/:/, $tail);
4971: my @secs = &localenroll::get_sections($coursecode,$cdom);
4972: my $seclist = &escape(join(':',@secs));
4973:
4974: &Reply($client, \$seclist, $userinput);
4975:
4976:
4977: return 1;
4978: }
4979: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4980:
4981: # Validate the owner of a new course section.
4982: #
4983: # Formal Parameters:
4984: # $cmd - Command that got us dispatched.
4985: # $tail - the remainder of the command. For us this consists of a
4986: # colon separated string containing:
4987: # $inst - Course Id from the institutions point of view.
4988: # $owner - Proposed owner of the course.
4989: # $cdom - Domain of the course (from the institutions
4990: # point of view?)..
4991: # $client - Socket open on the client.
4992: #
4993: # Returns:
4994: # 1 - Processing should continue.
4995: #
4996: sub validate_course_owner_handler {
4997: my ($cmd, $tail, $client) = @_;
4998: my $userinput = "$cmd:$tail";
4999: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
5000:
5001: $owner = &unescape($owner);
5002: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
5003: &Reply($client, \$outcome, $userinput);
5004:
5005:
5006:
5007: return 1;
5008: }
5009: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5010:
5011: #
5012: # Validate a course section in the official schedule of classes
5013: # from the institutions point of view (part of autoenrollment).
5014: #
5015: # Formal Parameters:
5016: # $cmd - The command request that got us dispatched.
5017: # $tail - The tail of the command. In this case,
5018: # this is a colon separated set of words that will be split
5019: # into:
5020: # $inst_course_id - The course/section id from the
5021: # institutions point of view.
5022: # $cdom - The domain from the institutions
5023: # point of view.
5024: # $client - Socket open on the client.
5025: # Returns:
5026: # 1 - Indicating processing should continue.
5027: #
5028: sub validate_course_section_handler {
5029: my ($cmd, $tail, $client) = @_;
5030: my $userinput = "$cmd:$tail";
5031: my ($inst_course_id, $cdom) = split(/:/, $tail);
5032:
5033: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5034: &Reply($client, \$outcome, $userinput);
5035:
5036:
5037: return 1;
5038: }
5039: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5040:
5041: #
5042: # Validate course owner's access to enrollment data for specific class section.
5043: #
5044: #
5045: # Formal Parameters:
5046: # $cmd - The command request that got us dispatched.
5047: # $tail - The tail of the command. In this case this is a colon separated
5048: # set of words that will be split into:
5049: # $inst_class - Institutional code for the specific class section
5050: # $courseowner - The escaped username:domain of the course owner
5051: # $cdom - The domain of the course from the institution's
5052: # point of view.
5053: # $client - The socket open on the client.
5054: # Returns:
5055: # 1 - continue processing.
5056: #
5057:
5058: sub validate_class_access_handler {
5059: my ($cmd, $tail, $client) = @_;
5060: my $userinput = "$cmd:$tail";
5061: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5062: my $owners = &unescape($ownerlist);
5063: my $outcome;
5064: eval {
5065: local($SIG{__DIE__})='DEFAULT';
5066: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5067: };
5068: &Reply($client,\$outcome, $userinput);
5069:
5070: return 1;
5071: }
5072: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5073:
5074: #
5075: # Create a password for a new LON-CAPA user added by auto-enrollment.
5076: # Only used for case where authentication method for new user is localauth
5077: #
5078: # Formal Parameters:
5079: # $cmd - The command request that got us dispatched.
5080: # $tail - The tail of the command. In this case this is a colon separated
5081: # set of words that will be split into:
5082: # $authparam - An authentication parameter (localauth parameter).
5083: # $cdom - The domain of the course from the institution's
5084: # point of view.
5085: # $client - The socket open on the client.
5086: # Returns:
5087: # 1 - continue processing.
5088: #
5089: sub create_auto_enroll_password_handler {
5090: my ($cmd, $tail, $client) = @_;
5091: my $userinput = "$cmd:$tail";
5092:
5093: my ($authparam, $cdom) = split(/:/, $userinput);
5094:
5095: my ($create_passwd,$authchk);
5096: ($authparam,
5097: $create_passwd,
5098: $authchk) = &localenroll::create_password($authparam,$cdom);
5099:
5100: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5101: $userinput);
5102:
5103:
5104: return 1;
5105: }
5106: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5107: 0, 1, 0);
5108:
5109: # Retrieve and remove temporary files created by/during autoenrollment.
5110: #
5111: # Formal Parameters:
5112: # $cmd - The command that got us dispatched.
5113: # $tail - The tail of the command. In our case this is a colon
5114: # separated list that will be split into:
5115: # $filename - The name of the file to remove.
5116: # The filename is given as a path relative to
5117: # the LonCAPA temp file directory.
5118: # $client - Socket open on the client.
5119: #
5120: # Returns:
5121: # 1 - Continue processing.
5122: sub retrieve_auto_file_handler {
5123: my ($cmd, $tail, $client) = @_;
5124: my $userinput = "cmd:$tail";
5125:
5126: my ($filename) = split(/:/, $tail);
5127:
5128: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5129: if ( (-e $source) && ($filename ne '') ) {
5130: my $reply = '';
5131: if (open(my $fh,$source)) {
5132: while (<$fh>) {
5133: chomp($_);
5134: $_ =~ s/^\s+//g;
5135: $_ =~ s/\s+$//g;
5136: $reply .= $_;
5137: }
5138: close($fh);
5139: &Reply($client, &escape($reply)."\n", $userinput);
5140:
5141: # Does this have to be uncommented??!? (RF).
5142: #
5143: # unlink($source);
5144: } else {
5145: &Failure($client, "error\n", $userinput);
5146: }
5147: } else {
5148: &Failure($client, "error\n", $userinput);
5149: }
5150:
5151:
5152: return 1;
5153: }
5154: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5155:
5156: sub crsreq_checks_handler {
5157: my ($cmd, $tail, $client) = @_;
5158: my $userinput = "$cmd:$tail";
5159: my $dom = $tail;
5160: my $result;
5161: my @reqtypes = ('official','unofficial','community');
5162: eval {
5163: local($SIG{__DIE__})='DEFAULT';
5164: my %validations;
5165: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5166: \%validations);
5167: if ($response eq 'ok') {
5168: foreach my $key (keys(%validations)) {
5169: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5170: }
5171: $result =~ s/\&$//;
5172: } else {
5173: $result = 'error';
5174: }
5175: };
5176: if (!$@) {
5177: &Reply($client, \$result, $userinput);
5178: } else {
5179: &Failure($client,"unknown_cmd\n",$userinput);
5180: }
5181: return 1;
5182: }
5183: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5184:
5185: sub validate_crsreq_handler {
5186: my ($cmd, $tail, $client) = @_;
5187: my $userinput = "$cmd:$tail";
5188: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
5189: $instcode = &unescape($instcode);
5190: $owner = &unescape($owner);
5191: $crstype = &unescape($crstype);
5192: $inststatuslist = &unescape($inststatuslist);
5193: $instcode = &unescape($instcode);
5194: $instseclist = &unescape($instseclist);
5195: my $outcome;
5196: eval {
5197: local($SIG{__DIE__})='DEFAULT';
5198: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5199: $inststatuslist,$instcode,
5200: $instseclist);
5201: };
5202: if (!$@) {
5203: &Reply($client, \$outcome, $userinput);
5204: } else {
5205: &Failure($client,"unknown_cmd\n",$userinput);
5206: }
5207: return 1;
5208: }
5209: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5210:
5211: #
5212: # Read and retrieve institutional code format (for support form).
5213: # Formal Parameters:
5214: # $cmd - Command that dispatched us.
5215: # $tail - Tail of the command. In this case it conatins
5216: # the course domain and the coursename.
5217: # $client - Socket open on the client.
5218: # Returns:
5219: # 1 - Continue processing.
5220: #
5221: sub get_institutional_code_format_handler {
5222: my ($cmd, $tail, $client) = @_;
5223: my $userinput = "$cmd:$tail";
5224:
5225: my $reply;
5226: my($cdom,$course) = split(/:/,$tail);
5227: my @pairs = split/\&/,$course;
5228: my %instcodes = ();
5229: my %codes = ();
5230: my @codetitles = ();
5231: my %cat_titles = ();
5232: my %cat_order = ();
5233: foreach (@pairs) {
5234: my ($key,$value) = split/=/,$_;
5235: $instcodes{&unescape($key)} = &unescape($value);
5236: }
5237: my $formatreply = &localenroll::instcode_format($cdom,
5238: \%instcodes,
5239: \%codes,
5240: \@codetitles,
5241: \%cat_titles,
5242: \%cat_order);
5243: if ($formatreply eq 'ok') {
5244: my $codes_str = &Apache::lonnet::hash2str(%codes);
5245: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5246: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5247: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5248: &Reply($client,
5249: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5250: .$cat_order_str."\n",
5251: $userinput);
5252: } else {
5253: # this else branch added by RF since if not ok, lonc will
5254: # hang waiting on reply until timeout.
5255: #
5256: &Reply($client, "format_error\n", $userinput);
5257: }
5258:
5259: return 1;
5260: }
5261: ®ister_handler("autoinstcodeformat",
5262: \&get_institutional_code_format_handler,0,1,0);
5263:
5264: sub get_institutional_defaults_handler {
5265: my ($cmd, $tail, $client) = @_;
5266: my $userinput = "$cmd:$tail";
5267:
5268: my $dom = $tail;
5269: my %defaults_hash;
5270: my @code_order;
5271: my $outcome;
5272: eval {
5273: local($SIG{__DIE__})='DEFAULT';
5274: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5275: \@code_order);
5276: };
5277: if (!$@) {
5278: if ($outcome eq 'ok') {
5279: my $result='';
5280: while (my ($key,$value) = each(%defaults_hash)) {
5281: $result.=&escape($key).'='.&escape($value).'&';
5282: }
5283: $result .= 'code_order='.&escape(join('&',@code_order));
5284: &Reply($client,\$result,$userinput);
5285: } else {
5286: &Reply($client,"error\n", $userinput);
5287: }
5288: } else {
5289: &Failure($client,"unknown_cmd\n",$userinput);
5290: }
5291: }
5292: ®ister_handler("autoinstcodedefaults",
5293: \&get_institutional_defaults_handler,0,1,0);
5294:
5295: sub get_possible_instcodes_handler {
5296: my ($cmd, $tail, $client) = @_;
5297: my $userinput = "$cmd:$tail";
5298:
5299: my $reply;
5300: my $cdom = $tail;
5301: my (@codetitles,%cat_titles,%cat_order,@code_order);
5302: my $formatreply = &localenroll::possible_instcodes($cdom,
5303: \@codetitles,
5304: \%cat_titles,
5305: \%cat_order,
5306: \@code_order);
5307: if ($formatreply eq 'ok') {
5308: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5309: $result .= join('&',map {&escape($_);} (@code_order)).':';
5310: foreach my $key (keys(%cat_titles)) {
5311: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5312: }
5313: $result =~ s/\&$//;
5314: $result .= ':';
5315: foreach my $key (keys(%cat_order)) {
5316: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5317: }
5318: $result =~ s/\&$//;
5319: &Reply($client,\$result,$userinput);
5320: } else {
5321: &Reply($client, "format_error\n", $userinput);
5322: }
5323: return 1;
5324: }
5325: ®ister_handler("autopossibleinstcodes",
5326: \&get_possible_instcodes_handler,0,1,0);
5327:
5328: sub get_institutional_user_rules {
5329: my ($cmd, $tail, $client) = @_;
5330: my $userinput = "$cmd:$tail";
5331: my $dom = &unescape($tail);
5332: my (%rules_hash,@rules_order);
5333: my $outcome;
5334: eval {
5335: local($SIG{__DIE__})='DEFAULT';
5336: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5337: };
5338: if (!$@) {
5339: if ($outcome eq 'ok') {
5340: my $result;
5341: foreach my $key (keys(%rules_hash)) {
5342: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5343: }
5344: $result =~ s/\&$//;
5345: $result .= ':';
5346: if (@rules_order > 0) {
5347: foreach my $item (@rules_order) {
5348: $result .= &escape($item).'&';
5349: }
5350: }
5351: $result =~ s/\&$//;
5352: &Reply($client,\$result,$userinput);
5353: } else {
5354: &Reply($client,"error\n", $userinput);
5355: }
5356: } else {
5357: &Failure($client,"unknown_cmd\n",$userinput);
5358: }
5359: }
5360: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5361:
5362: sub get_institutional_id_rules {
5363: my ($cmd, $tail, $client) = @_;
5364: my $userinput = "$cmd:$tail";
5365: my $dom = &unescape($tail);
5366: my (%rules_hash,@rules_order);
5367: my $outcome;
5368: eval {
5369: local($SIG{__DIE__})='DEFAULT';
5370: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5371: };
5372: if (!$@) {
5373: if ($outcome eq 'ok') {
5374: my $result;
5375: foreach my $key (keys(%rules_hash)) {
5376: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5377: }
5378: $result =~ s/\&$//;
5379: $result .= ':';
5380: if (@rules_order > 0) {
5381: foreach my $item (@rules_order) {
5382: $result .= &escape($item).'&';
5383: }
5384: }
5385: $result =~ s/\&$//;
5386: &Reply($client,\$result,$userinput);
5387: } else {
5388: &Reply($client,"error\n", $userinput);
5389: }
5390: } else {
5391: &Failure($client,"unknown_cmd\n",$userinput);
5392: }
5393: }
5394: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
5395:
5396: sub get_institutional_selfcreate_rules {
5397: my ($cmd, $tail, $client) = @_;
5398: my $userinput = "$cmd:$tail";
5399: my $dom = &unescape($tail);
5400: my (%rules_hash,@rules_order);
5401: my $outcome;
5402: eval {
5403: local($SIG{__DIE__})='DEFAULT';
5404: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
5405: };
5406: if (!$@) {
5407: if ($outcome eq 'ok') {
5408: my $result;
5409: foreach my $key (keys(%rules_hash)) {
5410: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5411: }
5412: $result =~ s/\&$//;
5413: $result .= ':';
5414: if (@rules_order > 0) {
5415: foreach my $item (@rules_order) {
5416: $result .= &escape($item).'&';
5417: }
5418: }
5419: $result =~ s/\&$//;
5420: &Reply($client,\$result,$userinput);
5421: } else {
5422: &Reply($client,"error\n", $userinput);
5423: }
5424: } else {
5425: &Failure($client,"unknown_cmd\n",$userinput);
5426: }
5427: }
5428: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
5429:
5430:
5431: sub institutional_username_check {
5432: my ($cmd, $tail, $client) = @_;
5433: my $userinput = "$cmd:$tail";
5434: my %rulecheck;
5435: my $outcome;
5436: my ($udom,$uname,@rules) = split(/:/,$tail);
5437: $udom = &unescape($udom);
5438: $uname = &unescape($uname);
5439: @rules = map {&unescape($_);} (@rules);
5440: eval {
5441: local($SIG{__DIE__})='DEFAULT';
5442: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
5443: };
5444: if (!$@) {
5445: if ($outcome eq 'ok') {
5446: my $result='';
5447: foreach my $key (keys(%rulecheck)) {
5448: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5449: }
5450: &Reply($client,\$result,$userinput);
5451: } else {
5452: &Reply($client,"error\n", $userinput);
5453: }
5454: } else {
5455: &Failure($client,"unknown_cmd\n",$userinput);
5456: }
5457: }
5458: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
5459:
5460: sub institutional_id_check {
5461: my ($cmd, $tail, $client) = @_;
5462: my $userinput = "$cmd:$tail";
5463: my %rulecheck;
5464: my $outcome;
5465: my ($udom,$id,@rules) = split(/:/,$tail);
5466: $udom = &unescape($udom);
5467: $id = &unescape($id);
5468: @rules = map {&unescape($_);} (@rules);
5469: eval {
5470: local($SIG{__DIE__})='DEFAULT';
5471: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
5472: };
5473: if (!$@) {
5474: if ($outcome eq 'ok') {
5475: my $result='';
5476: foreach my $key (keys(%rulecheck)) {
5477: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5478: }
5479: &Reply($client,\$result,$userinput);
5480: } else {
5481: &Reply($client,"error\n", $userinput);
5482: }
5483: } else {
5484: &Failure($client,"unknown_cmd\n",$userinput);
5485: }
5486: }
5487: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
5488:
5489: sub institutional_selfcreate_check {
5490: my ($cmd, $tail, $client) = @_;
5491: my $userinput = "$cmd:$tail";
5492: my %rulecheck;
5493: my $outcome;
5494: my ($udom,$email,@rules) = split(/:/,$tail);
5495: $udom = &unescape($udom);
5496: $email = &unescape($email);
5497: @rules = map {&unescape($_);} (@rules);
5498: eval {
5499: local($SIG{__DIE__})='DEFAULT';
5500: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
5501: };
5502: if (!$@) {
5503: if ($outcome eq 'ok') {
5504: my $result='';
5505: foreach my $key (keys(%rulecheck)) {
5506: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5507: }
5508: &Reply($client,\$result,$userinput);
5509: } else {
5510: &Reply($client,"error\n", $userinput);
5511: }
5512: } else {
5513: &Failure($client,"unknown_cmd\n",$userinput);
5514: }
5515: }
5516: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
5517:
5518: # Get domain specific conditions for import of student photographs to a course
5519: #
5520: # Retrieves information from photo_permission subroutine in localenroll.
5521: # Returns outcome (ok) if no processing errors, and whether course owner is
5522: # required to accept conditions of use (yes/no).
5523: #
5524: #
5525: sub photo_permission_handler {
5526: my ($cmd, $tail, $client) = @_;
5527: my $userinput = "$cmd:$tail";
5528: my $cdom = $tail;
5529: my ($perm_reqd,$conditions);
5530: my $outcome;
5531: eval {
5532: local($SIG{__DIE__})='DEFAULT';
5533: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
5534: \$conditions);
5535: };
5536: if (!$@) {
5537: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
5538: $userinput);
5539: } else {
5540: &Failure($client,"unknown_cmd\n",$userinput);
5541: }
5542: return 1;
5543: }
5544: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
5545:
5546: #
5547: # Checks if student photo is available for a user in the domain, in the user's
5548: # directory (in /userfiles/internal/studentphoto.jpg).
5549: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
5550: # the student's photo.
5551:
5552: sub photo_check_handler {
5553: my ($cmd, $tail, $client) = @_;
5554: my $userinput = "$cmd:$tail";
5555: my ($udom,$uname,$pid) = split(/:/,$tail);
5556: $udom = &unescape($udom);
5557: $uname = &unescape($uname);
5558: $pid = &unescape($pid);
5559: my $path=&propath($udom,$uname).'/userfiles/internal/';
5560: if (!-e $path) {
5561: &mkpath($path);
5562: }
5563: my $response;
5564: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
5565: $result .= ':'.$response;
5566: &Reply($client, &escape($result)."\n",$userinput);
5567: return 1;
5568: }
5569: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
5570:
5571: #
5572: # Retrieve information from localenroll about whether to provide a button
5573: # for users who have enbled import of student photos to initiate an
5574: # update of photo files for registered students. Also include
5575: # comment to display alongside button.
5576:
5577: sub photo_choice_handler {
5578: my ($cmd, $tail, $client) = @_;
5579: my $userinput = "$cmd:$tail";
5580: my $cdom = &unescape($tail);
5581: my ($update,$comment);
5582: eval {
5583: local($SIG{__DIE__})='DEFAULT';
5584: ($update,$comment) = &localenroll::manager_photo_update($cdom);
5585: };
5586: if (!$@) {
5587: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
5588: } else {
5589: &Failure($client,"unknown_cmd\n",$userinput);
5590: }
5591: return 1;
5592: }
5593: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
5594:
5595: #
5596: # Gets a student's photo to exist (in the correct image type) in the user's
5597: # directory.
5598: # Formal Parameters:
5599: # $cmd - The command request that got us dispatched.
5600: # $tail - A colon separated set of words that will be split into:
5601: # $domain - student's domain
5602: # $uname - student username
5603: # $type - image type desired
5604: # $client - The socket open on the client.
5605: # Returns:
5606: # 1 - continue processing.
5607:
5608: sub student_photo_handler {
5609: my ($cmd, $tail, $client) = @_;
5610: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
5611:
5612: my $path=&propath($domain,$uname). '/userfiles/internal/';
5613: my $filename = 'studentphoto.'.$ext;
5614: if ($type eq 'thumbnail') {
5615: $filename = 'studentphoto_tn.'.$ext;
5616: }
5617: if (-e $path.$filename) {
5618: &Reply($client,"ok\n","$cmd:$tail");
5619: return 1;
5620: }
5621: &mkpath($path);
5622: my $file;
5623: if ($type eq 'thumbnail') {
5624: eval {
5625: local($SIG{__DIE__})='DEFAULT';
5626: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
5627: };
5628: } else {
5629: $file=&localstudentphoto::fetch($domain,$uname);
5630: }
5631: if (!$file) {
5632: &Failure($client,"unavailable\n","$cmd:$tail");
5633: return 1;
5634: }
5635: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
5636: if (-e $path.$filename) {
5637: &Reply($client,"ok\n","$cmd:$tail");
5638: return 1;
5639: }
5640: &Failure($client,"unable_to_convert\n","$cmd:$tail");
5641: return 1;
5642: }
5643: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
5644:
5645: sub inst_usertypes_handler {
5646: my ($cmd, $domain, $client) = @_;
5647: my $res;
5648: my $userinput = $cmd.":".$domain; # For logging purposes.
5649: my (%typeshash,@order,$result);
5650: eval {
5651: local($SIG{__DIE__})='DEFAULT';
5652: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
5653: };
5654: if ($result eq 'ok') {
5655: if (keys(%typeshash) > 0) {
5656: foreach my $key (keys(%typeshash)) {
5657: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
5658: }
5659: }
5660: $res=~s/\&$//;
5661: $res .= ':';
5662: if (@order > 0) {
5663: foreach my $item (@order) {
5664: $res .= &escape($item).'&';
5665: }
5666: }
5667: $res=~s/\&$//;
5668: }
5669: &Reply($client, \$res, $userinput);
5670: return 1;
5671: }
5672: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
5673:
5674: # mkpath makes all directories for a file, expects an absolute path with a
5675: # file or a trailing / if just a dir is passed
5676: # returns 1 on success 0 on failure
5677: sub mkpath {
5678: my ($file)=@_;
5679: my @parts=split(/\//,$file,-1);
5680: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
5681: for (my $i=3;$i<= ($#parts-1);$i++) {
5682: $now.='/'.$parts[$i];
5683: if (!-e $now) {
5684: if (!mkdir($now,0770)) { return 0; }
5685: }
5686: }
5687: return 1;
5688: }
5689:
5690: #---------------------------------------------------------------
5691: #
5692: # Getting, decoding and dispatching requests:
5693: #
5694: #
5695: # Get a Request:
5696: # Gets a Request message from the client. The transaction
5697: # is defined as a 'line' of text. We remove the new line
5698: # from the text line.
5699: #
5700: sub get_request {
5701: my $input = <$client>;
5702: chomp($input);
5703:
5704: &Debug("get_request: Request = $input\n");
5705:
5706: &status('Processing '.$clientname.':'.$input);
5707:
5708: return $input;
5709: }
5710: #---------------------------------------------------------------
5711: #
5712: # Process a request. This sub should shrink as each action
5713: # gets farmed out into a separat sub that is registered
5714: # with the dispatch hash.
5715: #
5716: # Parameters:
5717: # user_input - The request received from the client (lonc).
5718: # Returns:
5719: # true to keep processing, false if caller should exit.
5720: #
5721: sub process_request {
5722: my ($userinput) = @_; # Easier for now to break style than to
5723: # fix all the userinput -> user_input.
5724: my $wasenc = 0; # True if request was encrypted.
5725: # ------------------------------------------------------------ See if encrypted
5726: # for command
5727: # sethost:<server>
5728: # <command>:<args>
5729: # we just send it to the processor
5730: # for
5731: # sethost:<server>:<command>:<args>
5732: # we do the implict set host and then do the command
5733: if ($userinput =~ /^sethost:/) {
5734: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
5735: if (defined($userinput)) {
5736: &sethost("$cmd:$newid");
5737: } else {
5738: $userinput = "$cmd:$newid";
5739: }
5740: }
5741:
5742: if ($userinput =~ /^enc/) {
5743: $userinput = decipher($userinput);
5744: $wasenc=1;
5745: if(!$userinput) { # Cipher not defined.
5746: &Failure($client, "error: Encrypted data without negotated key\n");
5747: return 0;
5748: }
5749: }
5750: Debug("process_request: $userinput\n");
5751:
5752: #
5753: # The 'correct way' to add a command to lond is now to
5754: # write a sub to execute it and Add it to the command dispatch
5755: # hash via a call to register_handler.. The comments to that
5756: # sub should give you enough to go on to show how to do this
5757: # along with the examples that are building up as this code
5758: # is getting refactored. Until all branches of the
5759: # if/elseif monster below have been factored out into
5760: # separate procesor subs, if the dispatch hash is missing
5761: # the command keyword, we will fall through to the remainder
5762: # of the if/else chain below in order to keep this thing in
5763: # working order throughout the transmogrification.
5764:
5765: my ($command, $tail) = split(/:/, $userinput, 2);
5766: chomp($command);
5767: chomp($tail);
5768: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
5769: $command =~ s/(\r)//; # And this too for parameterless commands.
5770: if(!$tail) {
5771: $tail =""; # defined but blank.
5772: }
5773:
5774: &Debug("Command received: $command, encoded = $wasenc");
5775:
5776: if(defined $Dispatcher{$command}) {
5777:
5778: my $dispatch_info = $Dispatcher{$command};
5779: my $handler = $$dispatch_info[0];
5780: my $need_encode = $$dispatch_info[1];
5781: my $client_types = $$dispatch_info[2];
5782: Debug("Matched dispatch hash: mustencode: $need_encode "
5783: ."ClientType $client_types");
5784:
5785: # Validate the request:
5786:
5787: my $ok = 1;
5788: my $requesterprivs = 0;
5789: if(&isClient()) {
5790: $requesterprivs |= $CLIENT_OK;
5791: }
5792: if(&isManager()) {
5793: $requesterprivs |= $MANAGER_OK;
5794: }
5795: if($need_encode && (!$wasenc)) {
5796: Debug("Must encode but wasn't: $need_encode $wasenc");
5797: $ok = 0;
5798: }
5799: if(($client_types & $requesterprivs) == 0) {
5800: Debug("Client not privileged to do this operation");
5801: $ok = 0;
5802: }
5803:
5804: if($ok) {
5805: Debug("Dispatching to handler $command $tail");
5806: my $keep_going = &$handler($command, $tail, $client);
5807: return $keep_going;
5808: } else {
5809: Debug("Refusing to dispatch because client did not match requirements");
5810: Failure($client, "refused\n", $userinput);
5811: return 1;
5812: }
5813:
5814: }
5815:
5816: print $client "unknown_cmd\n";
5817: # -------------------------------------------------------------------- complete
5818: Debug("process_request - returning 1");
5819: return 1;
5820: }
5821: #
5822: # Decipher encoded traffic
5823: # Parameters:
5824: # input - Encoded data.
5825: # Returns:
5826: # Decoded data or undef if encryption key was not yet negotiated.
5827: # Implicit input:
5828: # cipher - This global holds the negotiated encryption key.
5829: #
5830: sub decipher {
5831: my ($input) = @_;
5832: my $output = '';
5833:
5834:
5835: if($cipher) {
5836: my($enc, $enclength, $encinput) = split(/:/, $input);
5837: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5838: $output .=
5839: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5840: }
5841: return substr($output, 0, $enclength);
5842: } else {
5843: return undef;
5844: }
5845: }
5846:
5847: #
5848: # Register a command processor. This function is invoked to register a sub
5849: # to process a request. Once registered, the ProcessRequest sub can automatically
5850: # dispatch requests to an appropriate sub, and do the top level validity checking
5851: # as well:
5852: # - Is the keyword recognized.
5853: # - Is the proper client type attempting the request.
5854: # - Is the request encrypted if it has to be.
5855: # Parameters:
5856: # $request_name - Name of the request being registered.
5857: # This is the command request that will match
5858: # against the hash keywords to lookup the information
5859: # associated with the dispatch information.
5860: # $procedure - Reference to a sub to call to process the request.
5861: # All subs get called as follows:
5862: # Procedure($cmd, $tail, $replyfd, $key)
5863: # $cmd - the actual keyword that invoked us.
5864: # $tail - the tail of the request that invoked us.
5865: # $replyfd- File descriptor connected to the client
5866: # $must_encode - True if the request must be encoded to be good.
5867: # $client_ok - True if it's ok for a client to request this.
5868: # $manager_ok - True if it's ok for a manager to request this.
5869: # Side effects:
5870: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5871: # - On failure, the program will die as it's a bad internal bug to try to
5872: # register a duplicate command handler.
5873: #
5874: sub register_handler {
5875: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
5876:
5877: # Don't allow duplication#
5878:
5879: if (defined $Dispatcher{$request_name}) {
5880: die "Attempting to define a duplicate request handler for $request_name\n";
5881: }
5882: # Build the client type mask:
5883:
5884: my $client_type_mask = 0;
5885: if($client_ok) {
5886: $client_type_mask |= $CLIENT_OK;
5887: }
5888: if($manager_ok) {
5889: $client_type_mask |= $MANAGER_OK;
5890: }
5891:
5892: # Enter the hash:
5893:
5894: my @entry = ($procedure, $must_encode, $client_type_mask);
5895:
5896: $Dispatcher{$request_name} = \@entry;
5897:
5898: }
5899:
5900:
5901: #------------------------------------------------------------------
5902:
5903:
5904:
5905:
5906: #
5907: # Convert an error return code from lcpasswd to a string value.
5908: #
5909: sub lcpasswdstrerror {
5910: my $ErrorCode = shift;
5911: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
5912: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5913: } else {
5914: return $passwderrors[$ErrorCode];
5915: }
5916: }
5917:
5918: #
5919: # Convert an error return code from lcuseradd to a string value:
5920: #
5921: sub lcuseraddstrerror {
5922: my $ErrorCode = shift;
5923: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
5924: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
5925: } else {
5926: return $adderrors[$ErrorCode];
5927: }
5928: }
5929:
5930: # grabs exception and records it to log before exiting
5931: sub catchexception {
5932: my ($error)=@_;
5933: $SIG{'QUIT'}='DEFAULT';
5934: $SIG{__DIE__}='DEFAULT';
5935: &status("Catching exception");
5936: &logthis("<font color='red'>CRITICAL: "
5937: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
5938: ."a crash with this error msg->[$error]</font>");
5939: &logthis('Famous last words: '.$status.' - '.$lastlog);
5940: if ($client) { print $client "error: $error\n"; }
5941: $server->close();
5942: die($error);
5943: }
5944: sub timeout {
5945: &status("Handling Timeout");
5946: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
5947: &catchexception('Timeout');
5948: }
5949: # -------------------------------- Set signal handlers to record abnormal exits
5950:
5951:
5952: $SIG{'QUIT'}=\&catchexception;
5953: $SIG{__DIE__}=\&catchexception;
5954:
5955: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
5956: &status("Read loncapa.conf and loncapa_apache.conf");
5957: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
5958: %perlvar=%{$perlvarref};
5959: undef $perlvarref;
5960:
5961: # ----------------------------- Make sure this process is running from user=www
5962: my $wwwid=getpwnam('www');
5963: if ($wwwid!=$<) {
5964: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5965: my $subj="LON: $currenthostid User ID mismatch";
5966: system("echo 'User ID mismatch. lond must be run as user www.' |\
5967: mailto $emailto -s '$subj' > /dev/null");
5968: exit 1;
5969: }
5970:
5971: # --------------------------------------------- Check if other instance running
5972:
5973: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
5974:
5975: if (-e $pidfile) {
5976: my $lfh=IO::File->new("$pidfile");
5977: my $pide=<$lfh>;
5978: chomp($pide);
5979: if (kill 0 => $pide) { die "already running"; }
5980: }
5981:
5982: # ------------------------------------------------------------- Read hosts file
5983:
5984:
5985:
5986: # establish SERVER socket, bind and listen.
5987: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
5988: Type => SOCK_STREAM,
5989: Proto => 'tcp',
5990: Reuse => 1,
5991: Listen => 10 )
5992: or die "making socket: $@\n";
5993:
5994: # --------------------------------------------------------- Do global variables
5995:
5996: # global variables
5997:
5998: my %children = (); # keys are current child process IDs
5999:
6000: sub REAPER { # takes care of dead children
6001: $SIG{CHLD} = \&REAPER;
6002: &status("Handling child death");
6003: my $pid;
6004: do {
6005: $pid = waitpid(-1,&WNOHANG());
6006: if (defined($children{$pid})) {
6007: &logthis("Child $pid died");
6008: delete($children{$pid});
6009: } elsif ($pid > 0) {
6010: &logthis("Unknown Child $pid died");
6011: }
6012: } while ( $pid > 0 );
6013: foreach my $child (keys(%children)) {
6014: $pid = waitpid($child,&WNOHANG());
6015: if ($pid > 0) {
6016: &logthis("Child $child - $pid looks like we missed it's death");
6017: delete($children{$pid});
6018: }
6019: }
6020: &status("Finished Handling child death");
6021: }
6022:
6023: sub HUNTSMAN { # signal handler for SIGINT
6024: &status("Killing children (INT)");
6025: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6026: kill 'INT' => keys %children;
6027: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6028: my $execdir=$perlvar{'lonDaemons'};
6029: unlink("$execdir/logs/lond.pid");
6030: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6031: &status("Done killing children");
6032: exit; # clean up with dignity
6033: }
6034:
6035: sub HUPSMAN { # signal handler for SIGHUP
6036: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6037: &status("Killing children for restart (HUP)");
6038: kill 'INT' => keys %children;
6039: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6040: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6041: my $execdir=$perlvar{'lonDaemons'};
6042: unlink("$execdir/logs/lond.pid");
6043: &status("Restarting self (HUP)");
6044: exec("$execdir/lond"); # here we go again
6045: }
6046:
6047: #
6048: # Reload the Apache daemon's state.
6049: # This is done by invoking /home/httpd/perl/apachereload
6050: # a setuid perl script that can be root for us to do this job.
6051: #
6052: sub ReloadApache {
6053: my $execdir = $perlvar{'lonDaemons'};
6054: my $script = $execdir."/apachereload";
6055: system($script);
6056: }
6057:
6058: #
6059: # Called in response to a USR2 signal.
6060: # - Reread hosts.tab
6061: # - All children connected to hosts that were removed from hosts.tab
6062: # are killed via SIGINT
6063: # - All children connected to previously existing hosts are sent SIGUSR1
6064: # - Our internal hosts hash is updated to reflect the new contents of
6065: # hosts.tab causing connections from hosts added to hosts.tab to
6066: # now be honored.
6067: #
6068: sub UpdateHosts {
6069: &status("Reload hosts.tab");
6070: logthis('<font color="blue"> Updating connections </font>');
6071: #
6072: # The %children hash has the set of IP's we currently have children
6073: # on. These need to be matched against records in the hosts.tab
6074: # Any ip's no longer in the table get killed off they correspond to
6075: # either dropped or changed hosts. Note that the re-read of the table
6076: # will take care of new and changed hosts as connections come into being.
6077:
6078: &Apache::lonnet::reset_hosts_info();
6079:
6080: foreach my $child (keys(%children)) {
6081: my $childip = $children{$child};
6082: if ($childip ne '127.0.0.1'
6083: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
6084: logthis('<font color="blue"> UpdateHosts killing child '
6085: ." $child for ip $childip </font>");
6086: kill('INT', $child);
6087: } else {
6088: logthis('<font color="green"> keeping child for ip '
6089: ." $childip (pid=$child) </font>");
6090: }
6091: }
6092: ReloadApache;
6093: &status("Finished reloading hosts.tab");
6094: }
6095:
6096:
6097: sub checkchildren {
6098: &status("Checking on the children (sending signals)");
6099: &initnewstatus();
6100: &logstatus();
6101: &logthis('Going to check on the children');
6102: my $docdir=$perlvar{'lonDocRoot'};
6103: foreach (sort keys %children) {
6104: #sleep 1;
6105: unless (kill 'USR1' => $_) {
6106: &logthis ('Child '.$_.' is dead');
6107: &logstatus($$.' is dead');
6108: delete($children{$_});
6109: }
6110: }
6111: sleep 5;
6112: $SIG{ALRM} = sub { Debug("timeout");
6113: die "timeout"; };
6114: $SIG{__DIE__} = 'DEFAULT';
6115: &status("Checking on the children (waiting for reports)");
6116: foreach (sort keys %children) {
6117: unless (-e "$docdir/lon-status/londchld/$_.txt") {
6118: eval {
6119: alarm(300);
6120: &logthis('Child '.$_.' did not respond');
6121: kill 9 => $_;
6122: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6123: #$subj="LON: $currenthostid killed lond process $_";
6124: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6125: #$execdir=$perlvar{'lonDaemons'};
6126: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
6127: delete($children{$_});
6128: alarm(0);
6129: }
6130: }
6131: }
6132: $SIG{ALRM} = 'DEFAULT';
6133: $SIG{__DIE__} = \&catchexception;
6134: &status("Finished checking children");
6135: &logthis('Finished Checking children');
6136: }
6137:
6138: # --------------------------------------------------------------------- Logging
6139:
6140: sub logthis {
6141: my $message=shift;
6142: my $execdir=$perlvar{'lonDaemons'};
6143: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6144: my $now=time;
6145: my $local=localtime($now);
6146: $lastlog=$local.': '.$message;
6147: print $fh "$local ($$): $message\n";
6148: }
6149:
6150: # ------------------------- Conditional log if $DEBUG true.
6151: sub Debug {
6152: my $message = shift;
6153: if($DEBUG) {
6154: &logthis($message);
6155: }
6156: }
6157:
6158: #
6159: # Sub to do replies to client.. this gives a hook for some
6160: # debug tracing too:
6161: # Parameters:
6162: # fd - File open on client.
6163: # reply - Text to send to client.
6164: # request - Original request from client.
6165: #
6166: sub Reply {
6167: my ($fd, $reply, $request) = @_;
6168: if (ref($reply)) {
6169: print $fd $$reply;
6170: print $fd "\n";
6171: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6172: } else {
6173: print $fd $reply;
6174: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6175: }
6176: $Transactions++;
6177: }
6178:
6179:
6180: #
6181: # Sub to report a failure.
6182: # This function:
6183: # - Increments the failure statistic counters.
6184: # - Invokes Reply to send the error message to the client.
6185: # Parameters:
6186: # fd - File descriptor open on the client
6187: # reply - Reply text to emit.
6188: # request - The original request message (used by Reply
6189: # to debug if that's enabled.
6190: # Implicit outputs:
6191: # $Failures- The number of failures is incremented.
6192: # Reply (invoked here) sends a message to the
6193: # client:
6194: #
6195: sub Failure {
6196: my $fd = shift;
6197: my $reply = shift;
6198: my $request = shift;
6199:
6200: $Failures++;
6201: Reply($fd, $reply, $request); # That's simple eh?
6202: }
6203: # ------------------------------------------------------------------ Log status
6204:
6205: sub logstatus {
6206: &status("Doing logging");
6207: my $docdir=$perlvar{'lonDocRoot'};
6208: {
6209: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6210: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6211: $fh->close();
6212: }
6213: &status("Finished $$.txt");
6214: {
6215: open(LOG,">>$docdir/lon-status/londstatus.txt");
6216: flock(LOG,LOCK_EX);
6217: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6218: .$status."\t".$lastlog."\t $keymode\n";
6219: flock(LOG,LOCK_UN);
6220: close(LOG);
6221: }
6222: &status("Finished logging");
6223: }
6224:
6225: sub initnewstatus {
6226: my $docdir=$perlvar{'lonDocRoot'};
6227: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6228: my $now=time;
6229: my $local=localtime($now);
6230: print $fh "LOND status $local - parent $$\n\n";
6231: opendir(DIR,"$docdir/lon-status/londchld");
6232: while (my $filename=readdir(DIR)) {
6233: unlink("$docdir/lon-status/londchld/$filename");
6234: }
6235: closedir(DIR);
6236: }
6237:
6238: # -------------------------------------------------------------- Status setting
6239:
6240: sub status {
6241: my $what=shift;
6242: my $now=time;
6243: my $local=localtime($now);
6244: $status=$local.': '.$what;
6245: $0='lond: '.$what.' '.$local;
6246: }
6247:
6248: # -------------------------------------------------------------- Talk to lonsql
6249:
6250: sub sql_reply {
6251: my ($cmd)=@_;
6252: my $answer=&sub_sql_reply($cmd);
6253: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6254: return $answer;
6255: }
6256:
6257: sub sub_sql_reply {
6258: my ($cmd)=@_;
6259: my $unixsock="mysqlsock";
6260: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6261: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6262: Type => SOCK_STREAM,
6263: Timeout => 10)
6264: or return "con_lost";
6265: print $sclient "$cmd:$currentdomainid\n";
6266: my $answer=<$sclient>;
6267: chomp($answer);
6268: if (!$answer) { $answer="con_lost"; }
6269: return $answer;
6270: }
6271:
6272: # --------------------------------------- Is this the home server of an author?
6273:
6274: sub ishome {
6275: my $author=shift;
6276: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6277: my ($udom,$uname)=split(/\//,$author);
6278: my $proname=propath($udom,$uname);
6279: if (-e $proname) {
6280: return 'owner';
6281: } else {
6282: return 'not_owner';
6283: }
6284: }
6285:
6286: # ======================================================= Continue main program
6287: # ---------------------------------------------------- Fork once and dissociate
6288:
6289: my $fpid=fork;
6290: exit if $fpid;
6291: die "Couldn't fork: $!" unless defined ($fpid);
6292:
6293: POSIX::setsid() or die "Can't start new session: $!";
6294:
6295: # ------------------------------------------------------- Write our PID on disk
6296:
6297: my $execdir=$perlvar{'lonDaemons'};
6298: open (PIDSAVE,">$execdir/logs/lond.pid");
6299: print PIDSAVE "$$\n";
6300: close(PIDSAVE);
6301: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
6302: &status('Starting');
6303:
6304:
6305:
6306: # ----------------------------------------------------- Install signal handlers
6307:
6308:
6309: $SIG{CHLD} = \&REAPER;
6310: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6311: $SIG{HUP} = \&HUPSMAN;
6312: $SIG{USR1} = \&checkchildren;
6313: $SIG{USR2} = \&UpdateHosts;
6314:
6315: # Read the host hashes:
6316: &Apache::lonnet::load_hosts_tab();
6317: my %iphost = &Apache::lonnet::get_iphost(1);
6318:
6319: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
6320:
6321: # --------------------------------------------------------------
6322: # Accept connections. When a connection comes in, it is validated
6323: # and if good, a child process is created to process transactions
6324: # along the connection.
6325:
6326: while (1) {
6327: &status('Starting accept');
6328: $client = $server->accept() or next;
6329: &status('Accepted '.$client.' off to spawn');
6330: make_new_child($client);
6331: &status('Finished spawning');
6332: }
6333:
6334: sub make_new_child {
6335: my $pid;
6336: # my $cipher; # Now global
6337: my $sigset;
6338:
6339: $client = shift;
6340: &status('Starting new child '.$client);
6341: &logthis('<font color="green"> Attempting to start child ('.$client.
6342: ")</font>");
6343: # block signal for fork
6344: $sigset = POSIX::SigSet->new(SIGINT);
6345: sigprocmask(SIG_BLOCK, $sigset)
6346: or die "Can't block SIGINT for fork: $!\n";
6347:
6348: die "fork: $!" unless defined ($pid = fork);
6349:
6350: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6351: # connection liveness.
6352:
6353: #
6354: # Figure out who we're talking to so we can record the peer in
6355: # the pid hash.
6356: #
6357: my $caller = getpeername($client);
6358: my ($port,$iaddr);
6359: if (defined($caller) && length($caller) > 0) {
6360: ($port,$iaddr)=unpack_sockaddr_in($caller);
6361: } else {
6362: &logthis("Unable to determine who caller was, getpeername returned nothing");
6363: }
6364: if (defined($iaddr)) {
6365: $clientip = inet_ntoa($iaddr);
6366: Debug("Connected with $clientip");
6367: } else {
6368: &logthis("Unable to determine clientip");
6369: $clientip='Unavailable';
6370: }
6371:
6372: if ($pid) {
6373: # Parent records the child's birth and returns.
6374: sigprocmask(SIG_UNBLOCK, $sigset)
6375: or die "Can't unblock SIGINT for fork: $!\n";
6376: $children{$pid} = $clientip;
6377: &status('Started child '.$pid);
6378: return;
6379: } else {
6380: # Child can *not* return from this subroutine.
6381: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
6382: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
6383: #don't get intercepted
6384: $SIG{USR1}= \&logstatus;
6385: $SIG{ALRM}= \&timeout;
6386: $lastlog='Forked ';
6387: $status='Forked';
6388:
6389: # unblock signals
6390: sigprocmask(SIG_UNBLOCK, $sigset)
6391: or die "Can't unblock SIGINT for fork: $!\n";
6392:
6393: # my $tmpsnum=0; # Now global
6394: #---------------------------------------------------- kerberos 5 initialization
6395: &Authen::Krb5::init_context();
6396: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
6397: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
6398: &Authen::Krb5::init_ets();
6399: }
6400:
6401: &status('Accepted connection');
6402: # =============================================================================
6403: # do something with the connection
6404: # -----------------------------------------------------------------------------
6405: # see if we know client and 'check' for spoof IP by ineffective challenge
6406:
6407: my $outsideip=$clientip;
6408: if ($clientip eq '127.0.0.1') {
6409: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
6410: }
6411: &ReadManagerTable();
6412: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
6413: my $ismanager=($managers{$outsideip} ne undef);
6414: $clientname = "[unknown]";
6415: if($clientrec) { # Establish client type.
6416: $ConnectionType = "client";
6417: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
6418: if($ismanager) {
6419: $ConnectionType = "both";
6420: }
6421: } else {
6422: $ConnectionType = "manager";
6423: $clientname = $managers{$outsideip};
6424: }
6425: my $clientok;
6426:
6427: if ($clientrec || $ismanager) {
6428: &status("Waiting for init from $clientip $clientname");
6429: &logthis('<font color="yellow">INFO: Connection, '.
6430: $clientip.
6431: " ($clientname) connection type = $ConnectionType </font>" );
6432: &status("Connecting $clientip ($clientname))");
6433: my $remotereq=<$client>;
6434: chomp($remotereq);
6435: Debug("Got init: $remotereq");
6436:
6437: if ($remotereq =~ /^init/) {
6438: &sethost("sethost:$perlvar{'lonHostID'}");
6439: #
6440: # If the remote is attempting a local init... give that a try:
6441: #
6442: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
6443:
6444: # If the connection type is ssl, but I didn't get my
6445: # certificate files yet, then I'll drop back to
6446: # insecure (if allowed).
6447:
6448: if($inittype eq "ssl") {
6449: my ($ca, $cert) = lonssl::CertificateFile;
6450: my $kfile = lonssl::KeyFile;
6451: if((!$ca) ||
6452: (!$cert) ||
6453: (!$kfile)) {
6454: $inittype = ""; # This forces insecure attempt.
6455: &logthis("<font color=\"blue\"> Certificates not "
6456: ."installed -- trying insecure auth</font>");
6457: } else { # SSL certificates are in place so
6458: } # Leave the inittype alone.
6459: }
6460:
6461: if($inittype eq "local") {
6462: $clientversion = $perlvar{'lonVersion'};
6463: my $key = LocalConnection($client, $remotereq);
6464: if($key) {
6465: Debug("Got local key $key");
6466: $clientok = 1;
6467: my $cipherkey = pack("H32", $key);
6468: $cipher = new IDEA($cipherkey);
6469: print $client "ok:local\n";
6470: &logthis('<font color="green">'
6471: . "Successful local authentication </font>");
6472: $keymode = "local"
6473: } else {
6474: Debug("Failed to get local key");
6475: $clientok = 0;
6476: shutdown($client, 3);
6477: close $client;
6478: }
6479: } elsif ($inittype eq "ssl") {
6480: my $key = SSLConnection($client);
6481: if ($key) {
6482: $clientok = 1;
6483: my $cipherkey = pack("H32", $key);
6484: $cipher = new IDEA($cipherkey);
6485: &logthis('<font color="green">'
6486: ."Successfull ssl authentication with $clientname </font>");
6487: $keymode = "ssl";
6488:
6489: } else {
6490: $clientok = 0;
6491: close $client;
6492: }
6493:
6494: } else {
6495: my $ok = InsecureConnection($client);
6496: if($ok) {
6497: $clientok = 1;
6498: &logthis('<font color="green">'
6499: ."Successful insecure authentication with $clientname </font>");
6500: print $client "ok\n";
6501: $keymode = "insecure";
6502: } else {
6503: &logthis('<font color="yellow">'
6504: ."Attempted insecure connection disallowed </font>");
6505: close $client;
6506: $clientok = 0;
6507:
6508: }
6509: }
6510: } else {
6511: &logthis(
6512: "<font color='blue'>WARNING: "
6513: ."$clientip failed to initialize: >$remotereq< </font>");
6514: &status('No init '.$clientip);
6515: }
6516:
6517: } else {
6518: &logthis(
6519: "<font color='blue'>WARNING: Unknown client $clientip</font>");
6520: &status('Hung up on '.$clientip);
6521: }
6522:
6523: if ($clientok) {
6524: # ---------------- New known client connecting, could mean machine online again
6525: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
6526: && $clientip ne '127.0.0.1') {
6527: &Apache::lonnet::reconlonc($clientname);
6528: }
6529: &logthis("<font color='green'>Established connection: $clientname</font>");
6530: &status('Will listen to '.$clientname);
6531: # ------------------------------------------------------------ Process requests
6532: my $keep_going = 1;
6533: my $user_input;
6534: my $clienthost = &Apache::lonnet::hostname($clientname);
6535: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
6536: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
6537: while(($user_input = get_request) && $keep_going) {
6538: alarm(120);
6539: Debug("Main: Got $user_input\n");
6540: $keep_going = &process_request($user_input);
6541: alarm(0);
6542: &status('Listening to '.$clientname." ($keymode)");
6543: }
6544:
6545: # --------------------------------------------- client unknown or fishy, refuse
6546: } else {
6547: print $client "refused\n";
6548: $client->close();
6549: &logthis("<font color='blue'>WARNING: "
6550: ."Rejected client $clientip, closing connection</font>");
6551: }
6552: }
6553:
6554: # =============================================================================
6555:
6556: &logthis("<font color='red'>CRITICAL: "
6557: ."Disconnect from $clientip ($clientname)</font>");
6558:
6559:
6560: # this exit is VERY important, otherwise the child will become
6561: # a producer of more and more children, forking yourself into
6562: # process death.
6563: exit;
6564:
6565: }
6566: #
6567: # Determine if a user is an author for the indicated domain.
6568: #
6569: # Parameters:
6570: # domain - domain to check in .
6571: # user - Name of user to check.
6572: #
6573: # Return:
6574: # 1 - User is an author for domain.
6575: # 0 - User is not an author for domain.
6576: sub is_author {
6577: my ($domain, $user) = @_;
6578:
6579: &Debug("is_author: $user @ $domain");
6580:
6581: my $hashref = &tie_user_hash($domain, $user, "roles",
6582: &GDBM_READER());
6583:
6584: # Author role should show up as a key /domain/_au
6585:
6586: my $key = "/$domain/_au";
6587: my $value;
6588: if (defined($hashref)) {
6589: $value = $hashref->{$key};
6590: }
6591:
6592: if(defined($value)) {
6593: &Debug("$user @ $domain is an author");
6594: }
6595:
6596: return defined($value);
6597: }
6598: #
6599: # Checks to see if the input roleput request was to set
6600: # an author role. If so, invokes the lchtmldir script to set
6601: # up a correct public_html
6602: # Parameters:
6603: # request - The request sent to the rolesput subchunk.
6604: # We're looking for /domain/_au
6605: # domain - The domain in which the user is having roles doctored.
6606: # user - Name of the user for which the role is being put.
6607: # authtype - The authentication type associated with the user.
6608: #
6609: sub manage_permissions {
6610: my ($request, $domain, $user, $authtype) = @_;
6611:
6612: &Debug("manage_permissions: $request $domain $user $authtype");
6613:
6614: # See if the request is of the form /$domain/_au
6615: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
6616: my $execdir = $perlvar{'lonDaemons'};
6617: my $userhome= "/home/$user" ;
6618: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
6619: &Debug("Setting homedir permissions for $userhome");
6620: system("$execdir/lchtmldir $userhome $user $authtype");
6621: }
6622: }
6623:
6624:
6625: #
6626: # Return the full path of a user password file, whether it exists or not.
6627: # Parameters:
6628: # domain - Domain in which the password file lives.
6629: # user - name of the user.
6630: # Returns:
6631: # Full passwd path:
6632: #
6633: sub password_path {
6634: my ($domain, $user) = @_;
6635: return &propath($domain, $user).'/passwd';
6636: }
6637:
6638: # Password Filename
6639: # Returns the path to a passwd file given domain and user... only if
6640: # it exists.
6641: # Parameters:
6642: # domain - Domain in which to search.
6643: # user - username.
6644: # Returns:
6645: # - If the password file exists returns its path.
6646: # - If the password file does not exist, returns undefined.
6647: #
6648: sub password_filename {
6649: my ($domain, $user) = @_;
6650:
6651: Debug ("PasswordFilename called: dom = $domain user = $user");
6652:
6653: my $path = &password_path($domain, $user);
6654: Debug("PasswordFilename got path: $path");
6655: if(-e $path) {
6656: return $path;
6657: } else {
6658: return undef;
6659: }
6660: }
6661:
6662: #
6663: # Rewrite the contents of the user's passwd file.
6664: # Parameters:
6665: # domain - domain of the user.
6666: # name - User's name.
6667: # contents - New contents of the file.
6668: # Returns:
6669: # 0 - Failed.
6670: # 1 - Success.
6671: #
6672: sub rewrite_password_file {
6673: my ($domain, $user, $contents) = @_;
6674:
6675: my $file = &password_filename($domain, $user);
6676: if (defined $file) {
6677: my $pf = IO::File->new(">$file");
6678: if($pf) {
6679: print $pf "$contents\n";
6680: return 1;
6681: } else {
6682: return 0;
6683: }
6684: } else {
6685: return 0;
6686: }
6687:
6688: }
6689:
6690: #
6691: # get_auth_type - Determines the authorization type of a user in a domain.
6692:
6693: # Returns the authorization type or nouser if there is no such user.
6694: #
6695: sub get_auth_type {
6696: my ($domain, $user) = @_;
6697:
6698: Debug("get_auth_type( $domain, $user ) \n");
6699: my $proname = &propath($domain, $user);
6700: my $passwdfile = "$proname/passwd";
6701: if( -e $passwdfile ) {
6702: my $pf = IO::File->new($passwdfile);
6703: my $realpassword = <$pf>;
6704: chomp($realpassword);
6705: Debug("Password info = $realpassword\n");
6706: my ($authtype, $contentpwd) = split(/:/, $realpassword);
6707: Debug("Authtype = $authtype, content = $contentpwd\n");
6708: return "$authtype:$contentpwd";
6709: } else {
6710: Debug("Returning nouser");
6711: return "nouser";
6712: }
6713: }
6714:
6715: #
6716: # Validate a user given their domain, name and password. This utility
6717: # function is used by both AuthenticateHandler and ChangePasswordHandler
6718: # to validate the login credentials of a user.
6719: # Parameters:
6720: # $domain - The domain being logged into (this is required due to
6721: # the capability for multihomed systems.
6722: # $user - The name of the user being validated.
6723: # $password - The user's propoposed password.
6724: #
6725: # Returns:
6726: # 1 - The domain,user,pasword triplet corresponds to a valid
6727: # user.
6728: # 0 - The domain,user,password triplet is not a valid user.
6729: #
6730: sub validate_user {
6731: my ($domain, $user, $password, $checkdefauth) = @_;
6732:
6733: # Why negative ~pi you may well ask? Well this function is about
6734: # authentication, and therefore very important to get right.
6735: # I've initialized the flag that determines whether or not I've
6736: # validated correctly to a value it's not supposed to get.
6737: # At the end of this function. I'll ensure that it's not still that
6738: # value so we don't just wind up returning some accidental value
6739: # as a result of executing an unforseen code path that
6740: # did not set $validated. At the end of valid execution paths,
6741: # validated shoule be 1 for success or 0 for failuer.
6742:
6743: my $validated = -3.14159;
6744:
6745: # How we authenticate is determined by the type of authentication
6746: # the user has been assigned. If the authentication type is
6747: # "nouser", the user does not exist so we will return 0.
6748:
6749: my $contents = &get_auth_type($domain, $user);
6750: my ($howpwd, $contentpwd) = split(/:/, $contents);
6751:
6752: my $null = pack("C",0); # Used by kerberos auth types.
6753:
6754: if ($howpwd eq 'nouser') {
6755: if ($checkdefauth) {
6756: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
6757: if ($domdefaults{'auth_def'} eq 'localauth') {
6758: $howpwd = $domdefaults{'auth_def'};
6759: $contentpwd = $domdefaults{'auth_arg_def'};
6760: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
6761: ($domdefaults{'auth_def'} eq 'krb5')) &&
6762: ($domdefaults{'auth_arg_def'} ne '')) {
6763: $howpwd = $domdefaults{'auth_def'};
6764: $contentpwd = $domdefaults{'auth_arg_def'};
6765: }
6766: }
6767: }
6768: if ($howpwd ne 'nouser') {
6769: if($howpwd eq "internal") { # Encrypted is in local password file.
6770: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6771: }
6772: elsif ($howpwd eq "unix") { # User is a normal unix user.
6773: $contentpwd = (getpwnam($user))[1];
6774: if($contentpwd) {
6775: if($contentpwd eq 'x') { # Shadow password file...
6776: my $pwauth_path = "/usr/local/sbin/pwauth";
6777: open PWAUTH, "|$pwauth_path" or
6778: die "Cannot invoke authentication";
6779: print PWAUTH "$user\n$password\n";
6780: close PWAUTH;
6781: $validated = ! $?;
6782:
6783: } else { # Passwords in /etc/passwd.
6784: $validated = (crypt($password,
6785: $contentpwd) eq $contentpwd);
6786: }
6787: } else {
6788: $validated = 0;
6789: }
6790: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6791: my $checkwithkrb5 = 0;
6792: if ($dist =~/^fedora(\d+)$/) {
6793: if ($1 > 11) {
6794: $checkwithkrb5 = 1;
6795: }
6796: } elsif ($dist =~ /^suse([\d.]+)$/) {
6797: if ($1 > 11.1) {
6798: $checkwithkrb5 = 1;
6799: }
6800: }
6801: if ($checkwithkrb5) {
6802: $validated = &krb5_authen($password,$null,$user,$contentpwd);
6803: } else {
6804: $validated = &krb4_authen($password,$null,$user,$contentpwd);
6805: }
6806: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
6807: $validated = &krb5_authen($password,$null,$user,$contentpwd);
6808: } elsif ($howpwd eq "localauth") {
6809: # Authenticate via installation specific authentcation method:
6810: $validated = &localauth::localauth($user,
6811: $password,
6812: $contentpwd,
6813: $domain);
6814: if ($validated < 0) {
6815: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6816: $validated = 0;
6817: }
6818: } else { # Unrecognized auth is also bad.
6819: $validated = 0;
6820: }
6821: } else {
6822: $validated = 0;
6823: }
6824: #
6825: # $validated has the correct stat of the authentication:
6826: #
6827:
6828: unless ($validated != -3.14159) {
6829: # I >really really< want to know if this happens.
6830: # since it indicates that user authentication is badly
6831: # broken in some code path.
6832: #
6833: die "ValidateUser - failed to set the value of validated $domain, $user $password";
6834: }
6835: return $validated;
6836: }
6837:
6838: sub krb4_authen {
6839: my ($password,$null,$user,$contentpwd) = @_;
6840: my $validated = 0;
6841: if (!($password =~ /$null/) ) { # Null password not allowed.
6842: eval {
6843: require Authen::Krb4;
6844: };
6845: if (!$@) {
6846: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6847: "",
6848: $contentpwd,,
6849: 'krbtgt',
6850: $contentpwd,
6851: 1,
6852: $password);
6853: if(!$k4error) {
6854: $validated = 1;
6855: } else {
6856: $validated = 0;
6857: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6858: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6859: }
6860: } else {
6861: $validated = krb5_authen($password,$null,$user,$contentpwd);
6862: }
6863: }
6864: return $validated;
6865: }
6866:
6867: sub krb5_authen {
6868: my ($password,$null,$user,$contentpwd) = @_;
6869: my $validated = 0;
6870: if(!($password =~ /$null/)) { # Null password not allowed.
6871: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6872: .$contentpwd);
6873: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6874: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6875: my $credentials= &Authen::Krb5::cc_default();
6876: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6877: .$contentpwd));
6878: my $krbreturn;
6879: if (exists(&Authen::Krb5::get_init_creds_password)) {
6880: $krbreturn =
6881: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6882: $krbservice);
6883: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6884: } else {
6885: $krbreturn =
6886: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6887: $password,$credentials);
6888: $validated = ($krbreturn == 1);
6889: }
6890: if (!$validated) {
6891: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6892: &Authen::Krb5::error());
6893: }
6894: }
6895: return $validated;
6896: }
6897:
6898: sub addline {
6899: my ($fname,$hostid,$ip,$newline)=@_;
6900: my $contents;
6901: my $found=0;
6902: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
6903: my $sh;
6904: if ($sh=IO::File->new("$fname.subscription")) {
6905: while (my $subline=<$sh>) {
6906: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
6907: }
6908: $sh->close();
6909: }
6910: $sh=IO::File->new(">$fname.subscription");
6911: if ($contents) { print $sh $contents; }
6912: if ($newline) { print $sh $newline; }
6913: $sh->close();
6914: return $found;
6915: }
6916:
6917: sub get_chat {
6918: my ($cdom,$cname,$udom,$uname,$group)=@_;
6919:
6920: my @entries=();
6921: my $namespace = 'nohist_chatroom';
6922: my $namespace_inroom = 'nohist_inchatroom';
6923: if ($group ne '') {
6924: $namespace .= '_'.$group;
6925: $namespace_inroom .= '_'.$group;
6926: }
6927: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6928: &GDBM_READER());
6929: if ($hashref) {
6930: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6931: &untie_user_hash($hashref);
6932: }
6933: my @participants=();
6934: my $cutoff=time-60;
6935: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
6936: &GDBM_WRCREAT());
6937: if ($hashref) {
6938: $hashref->{$uname.':'.$udom}=time;
6939: foreach my $user (sort(keys(%$hashref))) {
6940: if ($hashref->{$user}>$cutoff) {
6941: push(@participants, 'active_participant:'.$user);
6942: }
6943: }
6944: &untie_user_hash($hashref);
6945: }
6946: return (@participants,@entries);
6947: }
6948:
6949: sub chat_add {
6950: my ($cdom,$cname,$newchat,$group)=@_;
6951: my @entries=();
6952: my $time=time;
6953: my $namespace = 'nohist_chatroom';
6954: my $logfile = 'chatroom.log';
6955: if ($group ne '') {
6956: $namespace .= '_'.$group;
6957: $logfile = 'chatroom_'.$group.'.log';
6958: }
6959: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6960: &GDBM_WRCREAT());
6961: if ($hashref) {
6962: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6963: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
6964: my ($thentime,$idnum)=split(/\_/,$lastid);
6965: my $newid=$time.'_000000';
6966: if ($thentime==$time) {
6967: $idnum=~s/^0+//;
6968: $idnum++;
6969: $idnum=substr('000000'.$idnum,-6,6);
6970: $newid=$time.'_'.$idnum;
6971: }
6972: $hashref->{$newid}=$newchat;
6973: my $expired=$time-3600;
6974: foreach my $comment (keys(%$hashref)) {
6975: my ($thistime) = ($comment=~/(\d+)\_/);
6976: if ($thistime<$expired) {
6977: delete $hashref->{$comment};
6978: }
6979: }
6980: {
6981: my $proname=&propath($cdom,$cname);
6982: if (open(CHATLOG,">>$proname/$logfile")) {
6983: print CHATLOG ("$time:".&unescape($newchat)."\n");
6984: }
6985: close(CHATLOG);
6986: }
6987: &untie_user_hash($hashref);
6988: }
6989: }
6990:
6991: sub unsub {
6992: my ($fname,$clientip)=@_;
6993: my $result;
6994: my $unsubs = 0; # Number of successful unsubscribes:
6995:
6996:
6997: # An old way subscriptions were handled was to have a
6998: # subscription marker file:
6999:
7000: Debug("Attempting unlink of $fname.$clientname");
7001: if (unlink("$fname.$clientname")) {
7002: $unsubs++; # Successful unsub via marker file.
7003: }
7004:
7005: # The more modern way to do it is to have a subscription list
7006: # file:
7007:
7008: if (-e "$fname.subscription") {
7009: my $found=&addline($fname,$clientname,$clientip,'');
7010: if ($found) {
7011: $unsubs++;
7012: }
7013: }
7014:
7015: # If either or both of these mechanisms succeeded in unsubscribing a
7016: # resource we can return ok:
7017:
7018: if($unsubs) {
7019: $result = "ok\n";
7020: } else {
7021: $result = "not_subscribed\n";
7022: }
7023:
7024: return $result;
7025: }
7026:
7027: sub currentversion {
7028: my $fname=shift;
7029: my $version=-1;
7030: my $ulsdir='';
7031: if ($fname=~/^(.+)\/[^\/]+$/) {
7032: $ulsdir=$1;
7033: }
7034: my ($fnamere1,$fnamere2);
7035: # remove version if already specified
7036: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
7037: # get the bits that go before and after the version number
7038: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7039: $fnamere1=$1;
7040: $fnamere2='.'.$2;
7041: }
7042: if (-e $fname) { $version=1; }
7043: if (-e $ulsdir) {
7044: if(-d $ulsdir) {
7045: if (opendir(LSDIR,$ulsdir)) {
7046: my $ulsfn;
7047: while ($ulsfn=readdir(LSDIR)) {
7048: # see if this is a regular file (ignore links produced earlier)
7049: my $thisfile=$ulsdir.'/'.$ulsfn;
7050: unless (-l $thisfile) {
7051: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
7052: if ($1>$version) { $version=$1; }
7053: }
7054: }
7055: }
7056: closedir(LSDIR);
7057: $version++;
7058: }
7059: }
7060: }
7061: return $version;
7062: }
7063:
7064: sub thisversion {
7065: my $fname=shift;
7066: my $version=-1;
7067: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7068: $version=$1;
7069: }
7070: return $version;
7071: }
7072:
7073: sub subscribe {
7074: my ($userinput,$clientip)=@_;
7075: my $result;
7076: my ($cmd,$fname)=split(/:/,$userinput,2);
7077: my $ownership=&ishome($fname);
7078: if ($ownership eq 'owner') {
7079: # explitly asking for the current version?
7080: unless (-e $fname) {
7081: my $currentversion=¤tversion($fname);
7082: if (&thisversion($fname)==$currentversion) {
7083: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7084: my $root=$1;
7085: my $extension=$2;
7086: symlink($root.'.'.$extension,
7087: $root.'.'.$currentversion.'.'.$extension);
7088: unless ($extension=~/\.meta$/) {
7089: symlink($root.'.'.$extension.'.meta',
7090: $root.'.'.$currentversion.'.'.$extension.'.meta');
7091: }
7092: }
7093: }
7094: }
7095: if (-e $fname) {
7096: if (-d $fname) {
7097: $result="directory\n";
7098: } else {
7099: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
7100: my $now=time;
7101: my $found=&addline($fname,$clientname,$clientip,
7102: "$clientname:$clientip:$now\n");
7103: if ($found) { $result="$fname\n"; }
7104: # if they were subscribed to only meta data, delete that
7105: # subscription, when you subscribe to a file you also get
7106: # the metadata
7107: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7108: $fname=~s/\/home\/httpd\/html\/res/raw/;
7109: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
7110: $result="$fname\n";
7111: }
7112: } else {
7113: $result="not_found\n";
7114: }
7115: } else {
7116: $result="rejected\n";
7117: }
7118: return $result;
7119: }
7120: # Change the passwd of a unix user. The caller must have
7121: # first verified that the user is a loncapa user.
7122: #
7123: # Parameters:
7124: # user - Unix user name to change.
7125: # pass - New password for the user.
7126: # Returns:
7127: # ok - if success
7128: # other - Some meaningfule error message string.
7129: # NOTE:
7130: # invokes a setuid script to change the passwd.
7131: sub change_unix_password {
7132: my ($user, $pass) = @_;
7133:
7134: &Debug("change_unix_password");
7135: my $execdir=$perlvar{'lonDaemons'};
7136: &Debug("Opening lcpasswd pipeline");
7137: my $pf = IO::File->new("|$execdir/lcpasswd > "
7138: ."$perlvar{'lonDaemons'}"
7139: ."/logs/lcpasswd.log");
7140: print $pf "$user\n$pass\n$pass\n";
7141: close $pf;
7142: my $err = $?;
7143: return ($err < @passwderrors) ? $passwderrors[$err] :
7144: "pwchange_falure - unknown error";
7145:
7146:
7147: }
7148:
7149:
7150: sub make_passwd_file {
7151: my ($uname, $umode,$npass,$passfilename)=@_;
7152: my $result="ok";
7153: if ($umode eq 'krb4' or $umode eq 'krb5') {
7154: {
7155: my $pf = IO::File->new(">$passfilename");
7156: if ($pf) {
7157: print $pf "$umode:$npass\n";
7158: } else {
7159: $result = "pass_file_failed_error";
7160: }
7161: }
7162: } elsif ($umode eq 'internal') {
7163: my $salt=time;
7164: $salt=substr($salt,6,2);
7165: my $ncpass=crypt($npass,$salt);
7166: {
7167: &Debug("Creating internal auth");
7168: my $pf = IO::File->new(">$passfilename");
7169: if($pf) {
7170: print $pf "internal:$ncpass\n";
7171: } else {
7172: $result = "pass_file_failed_error";
7173: }
7174: }
7175: } elsif ($umode eq 'localauth') {
7176: {
7177: my $pf = IO::File->new(">$passfilename");
7178: if($pf) {
7179: print $pf "localauth:$npass\n";
7180: } else {
7181: $result = "pass_file_failed_error";
7182: }
7183: }
7184: } elsif ($umode eq 'unix') {
7185: {
7186: #
7187: # Don't allow the creation of privileged accounts!!! that would
7188: # be real bad!!!
7189: #
7190: my $uid = getpwnam($uname);
7191: if((defined $uid) && ($uid == 0)) {
7192: &logthis(">>>Attempted to create privilged account blocked");
7193: return "no_priv_account_error\n";
7194: }
7195:
7196: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
7197:
7198: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
7199: {
7200: &Debug("Executing external: ".$execpath);
7201: &Debug("user = ".$uname.", Password =". $npass);
7202: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
7203: print $se "$uname\n";
7204: print $se "$npass\n";
7205: print $se "$npass\n";
7206: print $se "$lc_error_file\n"; # Status -> unique file.
7207: }
7208: if (-r $lc_error_file) {
7209: &Debug("Opening error file: $lc_error_file");
7210: my $error = IO::File->new("< $lc_error_file");
7211: my $useraddok = <$error>;
7212: $error->close;
7213: unlink($lc_error_file);
7214:
7215: chomp $useraddok;
7216:
7217: if($useraddok > 0) {
7218: my $error_text = &lcuseraddstrerror($useraddok);
7219: &logthis("Failed lcuseradd: $error_text");
7220: $result = "lcuseradd_failed:$error_text";
7221: } else {
7222: my $pf = IO::File->new(">$passfilename");
7223: if($pf) {
7224: print $pf "unix:\n";
7225: } else {
7226: $result = "pass_file_failed_error";
7227: }
7228: }
7229: } else {
7230: &Debug("Could not locate lcuseradd error: $lc_error_file");
7231: $result="bug_lcuseradd_no_output_file";
7232: }
7233: }
7234: } elsif ($umode eq 'none') {
7235: {
7236: my $pf = IO::File->new("> $passfilename");
7237: if($pf) {
7238: print $pf "none:\n";
7239: } else {
7240: $result = "pass_file_failed_error";
7241: }
7242: }
7243: } else {
7244: $result="auth_mode_error";
7245: }
7246: return $result;
7247: }
7248:
7249: sub convert_photo {
7250: my ($start,$dest)=@_;
7251: system("convert $start $dest");
7252: }
7253:
7254: sub sethost {
7255: my ($remotereq) = @_;
7256: my (undef,$hostid)=split(/:/,$remotereq);
7257: # ignore sethost if we are already correct
7258: if ($hostid eq $currenthostid) {
7259: return 'ok';
7260: }
7261:
7262: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
7263: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7264: eq &Apache::lonnet::get_host_ip($hostid)) {
7265: $currenthostid =$hostid;
7266: $currentdomainid=&Apache::lonnet::host_domain($hostid);
7267: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
7268: } else {
7269: &logthis("Requested host id $hostid not an alias of ".
7270: $perlvar{'lonHostID'}." refusing connection");
7271: return 'unable_to_set';
7272: }
7273: return 'ok';
7274: }
7275:
7276: sub version {
7277: my ($userinput)=@_;
7278: $remoteVERSION=(split(/:/,$userinput))[1];
7279: return "version:$VERSION";
7280: }
7281:
7282: sub get_usersession_config {
7283: my ($dom,$name) = @_;
7284: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
7285: if (defined($cached)) {
7286: return $usersessionconf;
7287: } else {
7288: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
7289: if (ref($domconfig{'usersessions'}) eq 'HASH') {
7290: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
7291: return $domconfig{'usersessions'};
7292: }
7293: }
7294: return;
7295: }
7296:
7297: sub releasereqd_check {
7298: my ($cnum,$cdom,$key,$value,$major,$minor,$now,$homecourses,$ids) = @_;
7299: my $home = &Apache::lonnet::homeserver($cnum,$cdom);
7300: return if ($home eq 'no_host');
7301: my ($reqdmajor,$reqdminor,$displayrole);
7302: if ($cnum =~ /$LONCAPA::match_community/) {
7303: if ($major eq '' && $minor eq '') {
7304: return unless ((ref($ids) eq 'ARRAY') &&
7305: (grep(/^\Q$home\E$/,@{$ids})));
7306: } else {
7307: $reqdmajor = 2;
7308: $reqdminor = 9;
7309: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
7310: }
7311: }
7312: my ($role,$end,$start) = split(/_/,$value);
7313: if (!$end || $end > $now) {
7314: my $hashid = $cdom.':'.$cnum;
7315: my ($courseinfo,$cached) =
7316: &Apache::lonnet::is_cached_new('courseinfo',$hashid);
7317: if (defined($cached)) {
7318: if (ref($courseinfo) eq 'HASH') {
7319: if (exists($courseinfo->{'releaserequired'})) {
7320: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
7321: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
7322: }
7323: }
7324: } else {
7325: if (ref($ids) eq 'ARRAY') {
7326: if (grep(/^\Q$home\E$/,@{$ids})) {
7327: if (ref($homecourses) eq 'HASH') {
7328: if (ref($homecourses->{$hashid}) eq 'ARRAY') {
7329: push(@{$homecourses->{$hashid}},{$key=>$value});
7330: } else {
7331: $homecourses->{$hashid} = [{$key=>$value}];
7332: }
7333: }
7334: return;
7335: }
7336: }
7337: my $courseinfo = &get_courseinfo_hash($cnum,$cdom,$home);
7338: if (ref($courseinfo) eq 'HASH') {
7339: if (exists($courseinfo->{'releaserequired'})) {
7340: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
7341: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
7342: }
7343: }
7344: }
7345: }
7346: return 1;
7347: }
7348:
7349: sub get_courseinfo_hash {
7350: my ($cnum,$cdom,$home) = @_;
7351: my $hashid = $cdom.':'.$cnum;
7352: my %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.');
7353: if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') {
7354: return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600);
7355: }
7356: return;
7357: }
7358:
7359: sub check_homecourses {
7360: my ($homecourses,$udom,$regexp,$count,$range,$start,$end,$major,$minor) = @_;
7361: my ($result,%addtocache);
7362: if (ref($homecourses) eq 'HASH') {
7363: my %okcourses;
7364: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
7365: if ($hashref) {
7366: while (my ($key,$value) = each(%$hashref)) {
7367: my $unesc_key = &unescape($key);
7368: next if ($unesc_key =~ /^lasttime:/);
7369: my $items = &Apache::lonnet::thaw_unescape($value);
7370: if (ref($items) eq 'HASH') {
7371: my $hashid = $unesc_key;
7372: $hashid =~ s/_/:/;
7373: &Apache::lonnet::do_cache_new('courseinfo',$hashid,$items,600);
7374: if (ref($homecourses->{$hashid}) eq 'ARRAY') {
7375: my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});
7376: if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {
7377: $okcourses{$hashid} = 1;
7378: }
7379: }
7380: }
7381: }
7382: unless (&untie_domain_hash($hashref)) {
7383: &logthis('Failed to untie tied hash for nohist_courseids.db');
7384: }
7385: } else {
7386: &logthis('Failed to tie hash for nohist_courseids.db');
7387: return;
7388: }
7389: foreach my $hashid (keys(%okcourses)) {
7390: if (ref($homecourses->{$hashid}) eq 'ARRAY') {
7391: foreach my $role (@{$homecourses->{$hashid}}) {
7392: if (ref($role) eq 'HASH') {
7393: while (my ($key,$value) = each(%{$role})) {
7394: if ($regexp eq '.') {
7395: $count++;
7396: if (defined($range) && $count >= $end) { last; }
7397: if (defined($range) && $count < $start) { next; }
7398: $result.=$key.'='.$value.'&';
7399: } else {
7400: my $unescapeKey = &unescape($key);
7401: if (eval('$unescapeKey=~/$regexp/')) {
7402: $count++;
7403: if (defined($range) && $count >= $end) { last; }
7404: if (defined($range) && $count < $start) { next; }
7405: $result.="$key=$value&";
7406: }
7407: }
7408: }
7409: }
7410: }
7411: }
7412: }
7413: }
7414: return $result;
7415: }
7416:
7417: sub useable_role {
7418: my ($reqdmajor,$reqdminor,$major,$minor) = @_;
7419: if ($reqdmajor ne '' && $reqdminor ne '') {
7420: return if (($major eq '' && $minor eq '') ||
7421: ($major < $reqdmajor) ||
7422: (($major == $reqdmajor) && ($minor < $reqdminor)));
7423: }
7424: return 1;
7425: }
7426:
7427: # ----------------------------------- POD (plain old documentation, CPAN style)
7428:
7429: =head1 NAME
7430:
7431: lond - "LON Daemon" Server (port "LOND" 5663)
7432:
7433: =head1 SYNOPSIS
7434:
7435: Usage: B<lond>
7436:
7437: Should only be run as user=www. This is a command-line script which
7438: is invoked by B<loncron>. There is no expectation that a typical user
7439: will manually start B<lond> from the command-line. (In other words,
7440: DO NOT START B<lond> YOURSELF.)
7441:
7442: =head1 DESCRIPTION
7443:
7444: There are two characteristics associated with the running of B<lond>,
7445: PROCESS MANAGEMENT (starting, stopping, handling child processes)
7446: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
7447: subscriptions, etc). These are described in two large
7448: sections below.
7449:
7450: B<PROCESS MANAGEMENT>
7451:
7452: Preforker - server who forks first. Runs as a daemon. HUPs.
7453: Uses IDEA encryption
7454:
7455: B<lond> forks off children processes that correspond to the other servers
7456: in the network. Management of these processes can be done at the
7457: parent process level or the child process level.
7458:
7459: B<logs/lond.log> is the location of log messages.
7460:
7461: The process management is now explained in terms of linux shell commands,
7462: subroutines internal to this code, and signal assignments:
7463:
7464: =over 4
7465:
7466: =item *
7467:
7468: PID is stored in B<logs/lond.pid>
7469:
7470: This is the process id number of the parent B<lond> process.
7471:
7472: =item *
7473:
7474: SIGTERM and SIGINT
7475:
7476: Parent signal assignment:
7477: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7478:
7479: Child signal assignment:
7480: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
7481: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
7482: to restart a new child.)
7483:
7484: Command-line invocations:
7485: B<kill> B<-s> SIGTERM I<PID>
7486: B<kill> B<-s> SIGINT I<PID>
7487:
7488: Subroutine B<HUNTSMAN>:
7489: This is only invoked for the B<lond> parent I<PID>.
7490: This kills all the children, and then the parent.
7491: The B<lonc.pid> file is cleared.
7492:
7493: =item *
7494:
7495: SIGHUP
7496:
7497: Current bug:
7498: This signal can only be processed the first time
7499: on the parent process. Subsequent SIGHUP signals
7500: have no effect.
7501:
7502: Parent signal assignment:
7503: $SIG{HUP} = \&HUPSMAN;
7504:
7505: Child signal assignment:
7506: none (nothing happens)
7507:
7508: Command-line invocations:
7509: B<kill> B<-s> SIGHUP I<PID>
7510:
7511: Subroutine B<HUPSMAN>:
7512: This is only invoked for the B<lond> parent I<PID>,
7513: This kills all the children, and then the parent.
7514: The B<lond.pid> file is cleared.
7515:
7516: =item *
7517:
7518: SIGUSR1
7519:
7520: Parent signal assignment:
7521: $SIG{USR1} = \&USRMAN;
7522:
7523: Child signal assignment:
7524: $SIG{USR1}= \&logstatus;
7525:
7526: Command-line invocations:
7527: B<kill> B<-s> SIGUSR1 I<PID>
7528:
7529: Subroutine B<USRMAN>:
7530: When invoked for the B<lond> parent I<PID>,
7531: SIGUSR1 is sent to all the children, and the status of
7532: each connection is logged.
7533:
7534: =item *
7535:
7536: SIGUSR2
7537:
7538: Parent Signal assignment:
7539: $SIG{USR2} = \&UpdateHosts
7540:
7541: Child signal assignment:
7542: NONE
7543:
7544:
7545: =item *
7546:
7547: SIGCHLD
7548:
7549: Parent signal assignment:
7550: $SIG{CHLD} = \&REAPER;
7551:
7552: Child signal assignment:
7553: none
7554:
7555: Command-line invocations:
7556: B<kill> B<-s> SIGCHLD I<PID>
7557:
7558: Subroutine B<REAPER>:
7559: This is only invoked for the B<lond> parent I<PID>.
7560: Information pertaining to the child is removed.
7561: The socket port is cleaned up.
7562:
7563: =back
7564:
7565: B<SERVER-SIDE ACTIVITIES>
7566:
7567: Server-side information can be accepted in an encrypted or non-encrypted
7568: method.
7569:
7570: =over 4
7571:
7572: =item ping
7573:
7574: Query a client in the hosts.tab table; "Are you there?"
7575:
7576: =item pong
7577:
7578: Respond to a ping query.
7579:
7580: =item ekey
7581:
7582: Read in encrypted key, make cipher. Respond with a buildkey.
7583:
7584: =item load
7585:
7586: Respond with CPU load based on a computation upon /proc/loadavg.
7587:
7588: =item currentauth
7589:
7590: Reply with current authentication information (only over an
7591: encrypted channel).
7592:
7593: =item auth
7594:
7595: Only over an encrypted channel, reply as to whether a user's
7596: authentication information can be validated.
7597:
7598: =item passwd
7599:
7600: Allow for a password to be set.
7601:
7602: =item makeuser
7603:
7604: Make a user.
7605:
7606: =item passwd
7607:
7608: Allow for authentication mechanism and password to be changed.
7609:
7610: =item home
7611:
7612: Respond to a question "are you the home for a given user?"
7613:
7614: =item update
7615:
7616: Update contents of a subscribed resource.
7617:
7618: =item unsubscribe
7619:
7620: The server is unsubscribing from a resource.
7621:
7622: =item subscribe
7623:
7624: The server is subscribing to a resource.
7625:
7626: =item log
7627:
7628: Place in B<logs/lond.log>
7629:
7630: =item put
7631:
7632: stores hash in namespace
7633:
7634: =item rolesputy
7635:
7636: put a role into a user's environment
7637:
7638: =item get
7639:
7640: returns hash with keys from array
7641: reference filled in from namespace
7642:
7643: =item eget
7644:
7645: returns hash with keys from array
7646: reference filled in from namesp (encrypts the return communication)
7647:
7648: =item rolesget
7649:
7650: get a role from a user's environment
7651:
7652: =item del
7653:
7654: deletes keys out of array from namespace
7655:
7656: =item keys
7657:
7658: returns namespace keys
7659:
7660: =item dump
7661:
7662: dumps the complete (or key matching regexp) namespace into a hash
7663:
7664: =item store
7665:
7666: stores hash permanently
7667: for this url; hashref needs to be given and should be a \%hashname; the
7668: remaining args aren't required and if they aren't passed or are '' they will
7669: be derived from the ENV
7670:
7671: =item restore
7672:
7673: returns a hash for a given url
7674:
7675: =item querysend
7676:
7677: Tells client about the lonsql process that has been launched in response
7678: to a sent query.
7679:
7680: =item queryreply
7681:
7682: Accept information from lonsql and make appropriate storage in temporary
7683: file space.
7684:
7685: =item idput
7686:
7687: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
7688: for each student, defined perhaps by the institutional Registrar.)
7689:
7690: =item idget
7691:
7692: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
7693: for each student, defined perhaps by the institutional Registrar.)
7694:
7695: =item tmpput
7696:
7697: Accept and store information in temporary space.
7698:
7699: =item tmpget
7700:
7701: Send along temporarily stored information.
7702:
7703: =item ls
7704:
7705: List part of a user's directory.
7706:
7707: =item pushtable
7708:
7709: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
7710: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
7711: must be restored manually in case of a problem with the new table file.
7712: pushtable requires that the request be encrypted and validated via
7713: ValidateManager. The form of the command is:
7714: enc:pushtable tablename <tablecontents> \n
7715: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
7716: cleartext newline.
7717:
7718: =item Hanging up (exit or init)
7719:
7720: What to do when a client tells the server that they (the client)
7721: are leaving the network.
7722:
7723: =item unknown command
7724:
7725: If B<lond> is sent an unknown command (not in the list above),
7726: it replys to the client "unknown_cmd".
7727:
7728:
7729: =item UNKNOWN CLIENT
7730:
7731: If the anti-spoofing algorithm cannot verify the client,
7732: the client is rejected (with a "refused" message sent
7733: to the client, and the connection is closed.
7734:
7735: =back
7736:
7737: =head1 PREREQUISITES
7738:
7739: IO::Socket
7740: IO::File
7741: Apache::File
7742: POSIX
7743: Crypt::IDEA
7744: LWP::UserAgent()
7745: GDBM_File
7746: Authen::Krb4
7747: Authen::Krb5
7748:
7749: =head1 COREQUISITES
7750:
7751: =head1 OSNAMES
7752:
7753: linux
7754:
7755: =head1 SCRIPT CATEGORIES
7756:
7757: Server/Process
7758:
7759: =cut
7760:
7761:
7762: =pod
7763:
7764: =head1 LOG MESSAGES
7765:
7766: The messages below can be emitted in the lond log. This log is located
7767: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
7768: to provide coloring if examined from inside a web page. Some do not.
7769: Where color is used, the colors are; Red for sometihhng to get excited
7770: about and to follow up on. Yellow for something to keep an eye on to
7771: be sure it does not get worse, Green,and Blue for informational items.
7772:
7773: In the discussions below, sometimes reference is made to ~httpd
7774: when describing file locations. There isn't really an httpd
7775: user, however there is an httpd directory that gets installed in the
7776: place that user home directories go. On linux, this is usually
7777: (always?) /home/httpd.
7778:
7779:
7780: Some messages are colorless. These are usually (not always)
7781: Green/Blue color level messages.
7782:
7783: =over 2
7784:
7785: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
7786:
7787: A local connection negotiation was attempted by
7788: a host whose IP address was not 127.0.0.1.
7789: The socket is closed and the child will exit.
7790: lond has three ways to establish an encyrption
7791: key with a client:
7792:
7793: =over 2
7794:
7795: =item local
7796:
7797: The key is written and read from a file.
7798: This is only valid for connections from localhost.
7799:
7800: =item insecure
7801:
7802: The key is generated by the server and
7803: transmitted to the client.
7804:
7805: =item ssl (secure)
7806:
7807: An ssl connection is negotiated with the client,
7808: the key is generated by the server and sent to the
7809: client across this ssl connection before the
7810: ssl connectionis terminated and clear text
7811: transmission resumes.
7812:
7813: =back
7814:
7815: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
7816:
7817: The client is local but has not sent an initialization
7818: string that is the literal "init:local" The connection
7819: is closed and the child exits.
7820:
7821: =item Red CRITICAL Can't get key file <error>
7822:
7823: SSL key negotiation is being attempted but the call to
7824: lonssl::KeyFile failed. This usually means that the
7825: configuration file is not correctly defining or protecting
7826: the directories/files lonCertificateDirectory or
7827: lonnetPrivateKey
7828: <error> is a string that describes the reason that
7829: the key file could not be located.
7830:
7831: =item (Red) CRITICAL Can't get certificates <error>
7832:
7833: SSL key negotiation failed because we were not able to retrives our certificate
7834: or the CA's certificate in the call to lonssl::CertificateFile
7835: <error> is the textual reason this failed. Usual reasons:
7836:
7837: =over 2
7838:
7839: =item Apache config file for loncapa incorrect:
7840:
7841: one of the variables
7842: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
7843: undefined or incorrect
7844:
7845: =item Permission error:
7846:
7847: The directory pointed to by lonCertificateDirectory is not readable by lond
7848:
7849: =item Permission error:
7850:
7851: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
7852:
7853: =item Installation error:
7854:
7855: Either the certificate authority file or the certificate have not
7856: been installed in lonCertificateDirectory.
7857:
7858: =item (Red) CRITICAL SSL Socket promotion failed: <err>
7859:
7860: The promotion of the connection from plaintext to SSL failed
7861: <err> is the reason for the failure. There are two
7862: system calls involved in the promotion (one of which failed),
7863: a dup to produce
7864: a second fd on the raw socket over which the encrypted data
7865: will flow and IO::SOcket::SSL->new_from_fd which creates
7866: the SSL connection on the duped fd.
7867:
7868: =item (Blue) WARNING client did not respond to challenge
7869:
7870: This occurs on an insecure (non SSL) connection negotiation request.
7871: lond generates some number from the time, the PID and sends it to
7872: the client. The client must respond by echoing this information back.
7873: If the client does not do so, that's a violation of the challenge
7874: protocols and the connection will be failed.
7875:
7876: =item (Red) No manager table. Nobody can manage!!
7877:
7878: lond has the concept of privileged hosts that
7879: can perform remote management function such
7880: as update the hosts.tab. The manager hosts
7881: are described in the
7882: ~httpd/lonTabs/managers.tab file.
7883: this message is logged if this file is missing.
7884:
7885:
7886: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
7887:
7888: Reports the successful parse and registration
7889: of a specific manager.
7890:
7891: =item Green existing host <clustername:dnsname>
7892:
7893: The manager host is already defined in the hosts.tab
7894: the information in that table, rather than the info in the
7895: manager table will be used to determine the manager's ip.
7896:
7897: =item (Red) Unable to craete <filename>
7898:
7899: lond has been asked to create new versions of an administrative
7900: file (by a manager). When this is done, the new file is created
7901: in a temp file and then renamed into place so that there are always
7902: usable administrative files, even if the update fails. This failure
7903: message means that the temp file could not be created.
7904: The update is abandoned, and the old file is available for use.
7905:
7906: =item (Green) CopyFile from <oldname> to <newname> failed
7907:
7908: In an update of administrative files, the copy of the existing file to a
7909: backup file failed. The installation of the new file may still succeed,
7910: but there will not be a back up file to rever to (this should probably
7911: be yellow).
7912:
7913: =item (Green) Pushfile: backed up <oldname> to <newname>
7914:
7915: See above, the backup of the old administrative file succeeded.
7916:
7917: =item (Red) Pushfile: Unable to install <filename> <reason>
7918:
7919: The new administrative file could not be installed. In this case,
7920: the old administrative file is still in use.
7921:
7922: =item (Green) Installed new < filename>.
7923:
7924: The new administrative file was successfullly installed.
7925:
7926: =item (Red) Reinitializing lond pid=<pid>
7927:
7928: The lonc child process <pid> will be sent a USR2
7929: signal.
7930:
7931: =item (Red) Reinitializing self
7932:
7933: We've been asked to re-read our administrative files,and
7934: are doing so.
7935:
7936: =item (Yellow) error:Invalid process identifier <ident>
7937:
7938: A reinit command was received, but the target part of the
7939: command was not valid. It must be either
7940: 'lond' or 'lonc' but was <ident>
7941:
7942: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
7943:
7944: Checking to see if lond has been handed a valid edit
7945: command. It is possible the edit command is not valid
7946: in that case there are no log messages to indicate that.
7947:
7948: =item Result of password change for <username> pwchange_success
7949:
7950: The password for <username> was
7951: successfully changed.
7952:
7953: =item Unable to open <user> passwd to change password
7954:
7955: Could not rewrite the
7956: internal password file for a user
7957:
7958: =item Result of password change for <user> : <result>
7959:
7960: A unix password change for <user> was attempted
7961: and the pipe returned <result>
7962:
7963: =item LWP GET: <message> for <fname> (<remoteurl>)
7964:
7965: The lightweight process fetch for a resource failed
7966: with <message> the local filename that should
7967: have existed/been created was <fname> the
7968: corresponding URI: <remoteurl> This is emitted in several
7969: places.
7970:
7971: =item Unable to move <transname> to <destname>
7972:
7973: From fetch_user_file_handler - the user file was replicated but could not
7974: be mv'd to its final location.
7975:
7976: =item Looking for <domain> <username>
7977:
7978: From user_has_session_handler - This should be a Debug call instead
7979: it indicates lond is about to check whether the specified user has a
7980: session active on the specified domain on the local host.
7981:
7982: =item Client <ip> (<name>) hanging up: <input>
7983:
7984: lond has been asked to exit by its client. The <ip> and <name> identify the
7985: client systemand <input> is the full exit command sent to the server.
7986:
7987: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
7988:
7989: A lond child terminated. NOte that this termination can also occur when the
7990: child receives the QUIT or DIE signals. <pid> is the process id of the child,
7991: <hostname> the host lond is working for, and <message> the reason the child died
7992: to the best of our ability to get it (I would guess that any numeric value
7993: represents and errno value). This is immediately followed by
7994:
7995: =item Famous last words: Catching exception - <log>
7996:
7997: Where log is some recent information about the state of the child.
7998:
7999: =item Red CRITICAL: TIME OUT <pid>
8000:
8001: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
8002: doing an HTTP::GET.
8003:
8004: =item child <pid> died
8005:
8006: The reaper caught a SIGCHILD for the lond child process <pid>
8007: This should be modified to also display the IP of the dying child
8008: $children{$pid}
8009:
8010: =item Unknown child 0 died
8011: A child died but the wait for it returned a pid of zero which really should not
8012: ever happen.
8013:
8014: =item Child <which> - <pid> looks like we missed it's death
8015:
8016: When a sigchild is received, the reaper process checks all children to see if they are
8017: alive. If children are dying quite quickly, the lack of signal queuing can mean
8018: that a signal hearalds the death of more than one child. If so this message indicates
8019: which other one died. <which> is the ip of a dead child
8020:
8021: =item Free socket: <shutdownretval>
8022:
8023: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
8024: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
8025: to return anything. This is followed by:
8026:
8027: =item Red CRITICAL: Shutting down
8028:
8029: Just prior to exit.
8030:
8031: =item Free socket: <shutdownretval>
8032:
8033: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
8034: This is followed by:
8035:
8036: =item (Red) CRITICAL: Restarting
8037:
8038: lond is about to exec itself to restart.
8039:
8040: =item (Blue) Updating connections
8041:
8042: (In response to a USR2). All the children (except the one for localhost)
8043: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
8044:
8045: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
8046:
8047: Due to USR2 as above.
8048:
8049: =item (Green) keeping child for ip <ip> (pid = <pid>)
8050:
8051: In response to USR2 as above, the child indicated is not being restarted because
8052: it's assumed that we'll always need a child for the localhost.
8053:
8054:
8055: =item Going to check on the children
8056:
8057: Parent is about to check on the health of the child processes.
8058: Note that this is in response to a USR1 sent to the parent lond.
8059: there may be one or more of the next two messages:
8060:
8061: =item <pid> is dead
8062:
8063: A child that we have in our child hash as alive has evidently died.
8064:
8065: =item Child <pid> did not respond
8066:
8067: In the health check the child <pid> did not update/produce a pid_.txt
8068: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
8069: assumed to be hung in some un-fixable way.
8070:
8071: =item Finished checking children
8072:
8073: Master processs's USR1 processing is cojmplete.
8074:
8075: =item (Red) CRITICAL: ------- Starting ------
8076:
8077: (There are more '-'s on either side). Lond has forked itself off to
8078: form a new session and is about to start actual initialization.
8079:
8080: =item (Green) Attempting to start child (<client>)
8081:
8082: Started a new child process for <client>. Client is IO::Socket object
8083: connected to the child. This was as a result of a TCP/IP connection from a client.
8084:
8085: =item Unable to determine who caller was, getpeername returned nothing
8086:
8087: In child process initialization. either getpeername returned undef or
8088: a zero sized object was returned. Processing continues, but in my opinion,
8089: this should be cause for the child to exit.
8090:
8091: =item Unable to determine clientip
8092:
8093: In child process initialization. The peer address from getpeername was not defined.
8094: The client address is stored as "Unavailable" and processing continues.
8095:
8096: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8097:
8098: In child initialization. A good connectionw as received from <ip>.
8099:
8100: =over 2
8101:
8102: =item <name>
8103:
8104: is the name of the client from hosts.tab.
8105:
8106: =item <type>
8107:
8108: Is the connection type which is either
8109:
8110: =over 2
8111:
8112: =item manager
8113:
8114: The connection is from a manager node, not in hosts.tab
8115:
8116: =item client
8117:
8118: the connection is from a non-manager in the hosts.tab
8119:
8120: =item both
8121:
8122: The connection is from a manager in the hosts.tab.
8123:
8124: =back
8125:
8126: =back
8127:
8128: =item (Blue) Certificates not installed -- trying insecure auth
8129:
8130: One of the certificate file, key file or
8131: certificate authority file could not be found for a client attempting
8132: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8133: (this would be a system with an up to date lond that has not gotten a
8134: certificate from us).
8135:
8136: =item (Green) Successful local authentication
8137:
8138: A local connection successfully negotiated the encryption key.
8139: In this case the IDEA key is in a file (that is hopefully well protected).
8140:
8141: =item (Green) Successful ssl authentication with <client>
8142:
8143: The client (<client> is the peer's name in hosts.tab), has successfully
8144: negotiated an SSL connection with this child process.
8145:
8146: =item (Green) Successful insecure authentication with <client>
8147:
8148:
8149: The client has successfully negotiated an insecure connection withthe child process.
8150:
8151: =item (Yellow) Attempted insecure connection disallowed
8152:
8153: The client attempted and failed to successfully negotiate a successful insecure
8154: connection. This can happen either because the variable londAllowInsecure is false
8155: or undefined, or becuse the child did not successfully echo back the challenge
8156: string.
8157:
8158:
8159: =back
8160:
8161: =back
8162:
8163:
8164: =cut
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