1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.430 2009/10/20 00:50:33 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::Krb4;
46: use Authen::Krb5;
47: use localauth;
48: use localenroll;
49: use localstudentphoto;
50: use File::Copy;
51: use File::Find;
52: use LONCAPA::lonlocal;
53: use LONCAPA::lonssl;
54: use Fcntl qw(:flock);
55: use Apache::lonnet;
56:
57: my $DEBUG = 0; # Non zero to enable debug log entries.
58:
59: my $status='';
60: my $lastlog='';
61:
62: my $VERSION='$Revision: 1.430 $'; #' stupid emacs
63: my $remoteVERSION;
64: my $currenthostid="default";
65: my $currentdomainid;
66:
67: my $client;
68: my $clientip; # IP address of client.
69: my $clientname; # LonCAPA name of client.
70:
71: my $server;
72:
73: my $keymode;
74:
75: my $cipher; # Cipher key negotiated with client
76: my $tmpsnum = 0; # Id of tmpputs.
77:
78: #
79: # Connection type is:
80: # client - All client actions are allowed
81: # manager - only management functions allowed.
82: # both - Both management and client actions are allowed
83: #
84:
85: my $ConnectionType;
86:
87: my %managers; # Ip -> manager names
88:
89: my %perlvar; # Will have the apache conf defined perl vars.
90:
91: #
92: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
93: # Each element of the hash contains a reference to an array that contains:
94: # A reference to a sub that executes the request corresponding to the keyword.
95: # A flag that is true if the request must be encoded to be acceptable.
96: # A mask with bits as follows:
97: # CLIENT_OK - Set when the function is allowed by ordinary clients
98: # MANAGER_OK - Set when the function is allowed to manager clients.
99: #
100: my $CLIENT_OK = 1;
101: my $MANAGER_OK = 2;
102: my %Dispatcher;
103:
104:
105: #
106: # The array below are password error strings."
107: #
108: my $lastpwderror = 13; # Largest error number from lcpasswd.
109: my @passwderrors = ("ok",
110: "pwchange_failure - lcpasswd must be run as user 'www'",
111: "pwchange_failure - lcpasswd got incorrect number of arguments",
112: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
113: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
114: "pwchange_failure - lcpasswd User does not exist.",
115: "pwchange_failure - lcpasswd Incorrect current passwd",
116: "pwchange_failure - lcpasswd Unable to su to root.",
117: "pwchange_failure - lcpasswd Cannot set new passwd.",
118: "pwchange_failure - lcpasswd Username has invalid characters",
119: "pwchange_failure - lcpasswd Invalid characters in password",
120: "pwchange_failure - lcpasswd User already exists",
121: "pwchange_failure - lcpasswd Something went wrong with user addition.",
122: "pwchange_failure - lcpasswd Password mismatch",
123: "pwchange_failure - lcpasswd Error filename is invalid");
124:
125:
126: # The array below are lcuseradd error strings.:
127:
128: my $lastadderror = 13;
129: my @adderrors = ("ok",
130: "User ID mismatch, lcuseradd must run as user www",
131: "lcuseradd Incorrect number of command line parameters must be 3",
132: "lcuseradd Incorrect number of stdinput lines, must be 3",
133: "lcuseradd Too many other simultaneous pwd changes in progress",
134: "lcuseradd User does not exist",
135: "lcuseradd Unable to make www member of users's group",
136: "lcuseradd Unable to su to root",
137: "lcuseradd Unable to set password",
138: "lcuseradd Username has invalid characters",
139: "lcuseradd Password has an invalid character",
140: "lcuseradd User already exists",
141: "lcuseradd Could not add user.",
142: "lcuseradd Password mismatch");
143:
144:
145: # This array are the errors from lcinstallfile:
146:
147: my @installerrors = ("ok",
148: "Initial user id of client not that of www",
149: "Usage error, not enough command line arguments",
150: "Source file name does not exist",
151: "Destination file name does not exist",
152: "Some file operation failed",
153: "Invalid table filename."
154: );
155:
156: #
157: # Statistics that are maintained and dislayed in the status line.
158: #
159: my $Transactions = 0; # Number of attempted transactions.
160: my $Failures = 0; # Number of transcations failed.
161:
162: # ResetStatistics:
163: # Resets the statistics counters:
164: #
165: sub ResetStatistics {
166: $Transactions = 0;
167: $Failures = 0;
168: }
169:
170: #------------------------------------------------------------------------
171: #
172: # LocalConnection
173: # Completes the formation of a locally authenticated connection.
174: # This function will ensure that the 'remote' client is really the
175: # local host. If not, the connection is closed, and the function fails.
176: # If so, initcmd is parsed for the name of a file containing the
177: # IDEA session key. The fie is opened, read, deleted and the session
178: # key returned to the caller.
179: #
180: # Parameters:
181: # $Socket - Socket open on client.
182: # $initcmd - The full text of the init command.
183: #
184: # Returns:
185: # IDEA session key on success.
186: # undef on failure.
187: #
188: sub LocalConnection {
189: my ($Socket, $initcmd) = @_;
190: Debug("Attempting local connection: $initcmd client: $clientip");
191: if($clientip ne "127.0.0.1") {
192: &logthis('<font color="red"> LocalConnection rejecting non local: '
193: ."$clientip ne 127.0.0.1 </font>");
194: close $Socket;
195: return undef;
196: } else {
197: chomp($initcmd); # Get rid of \n in filename.
198: my ($init, $type, $name) = split(/:/, $initcmd);
199: Debug(" Init command: $init $type $name ");
200:
201: # Require that $init = init, and $type = local: Otherwise
202: # the caller is insane:
203:
204: if(($init ne "init") && ($type ne "local")) {
205: &logthis('<font color = "red"> LocalConnection: caller is insane! '
206: ."init = $init, and type = $type </font>");
207: close($Socket);;
208: return undef;
209:
210: }
211: # Now get the key filename:
212:
213: my $IDEAKey = lonlocal::ReadKeyFile($name);
214: return $IDEAKey;
215: }
216: }
217: #------------------------------------------------------------------------------
218: #
219: # SSLConnection
220: # Completes the formation of an ssh authenticated connection. The
221: # socket is promoted to an ssl socket. If this promotion and the associated
222: # certificate exchange are successful, the IDEA key is generated and sent
223: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
224: # the caller after the SSL tunnel is torn down.
225: #
226: # Parameters:
227: # Name Type Purpose
228: # $Socket IO::Socket::INET Plaintext socket.
229: #
230: # Returns:
231: # IDEA key on success.
232: # undef on failure.
233: #
234: sub SSLConnection {
235: my $Socket = shift;
236:
237: Debug("SSLConnection: ");
238: my $KeyFile = lonssl::KeyFile();
239: if(!$KeyFile) {
240: my $err = lonssl::LastError();
241: &logthis("<font color=\"red\"> CRITICAL"
242: ."Can't get key file $err </font>");
243: return undef;
244: }
245: my ($CACertificate,
246: $Certificate) = lonssl::CertificateFile();
247:
248:
249: # If any of the key, certificate or certificate authority
250: # certificate filenames are not defined, this can't work.
251:
252: if((!$Certificate) || (!$CACertificate)) {
253: my $err = lonssl::LastError();
254: &logthis("<font color=\"red\"> CRITICAL"
255: ."Can't get certificates: $err </font>");
256:
257: return undef;
258: }
259: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
260:
261: # Indicate to our peer that we can procede with
262: # a transition to ssl authentication:
263:
264: print $Socket "ok:ssl\n";
265:
266: Debug("Approving promotion -> ssl");
267: # And do so:
268:
269: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
270: $CACertificate,
271: $Certificate,
272: $KeyFile);
273: if(! ($SSLSocket) ) { # SSL socket promotion failed.
274: my $err = lonssl::LastError();
275: &logthis("<font color=\"red\"> CRITICAL "
276: ."SSL Socket promotion failed: $err </font>");
277: return undef;
278: }
279: Debug("SSL Promotion successful");
280:
281: #
282: # The only thing we'll use the socket for is to send the IDEA key
283: # to the peer:
284:
285: my $Key = lonlocal::CreateCipherKey();
286: print $SSLSocket "$Key\n";
287:
288: lonssl::Close($SSLSocket);
289:
290: Debug("Key exchange complete: $Key");
291:
292: return $Key;
293: }
294: #
295: # InsecureConnection:
296: # If insecure connections are allowd,
297: # exchange a challenge with the client to 'validate' the
298: # client (not really, but that's the protocol):
299: # We produce a challenge string that's sent to the client.
300: # The client must then echo the challenge verbatim to us.
301: #
302: # Parameter:
303: # Socket - Socket open on the client.
304: # Returns:
305: # 1 - success.
306: # 0 - failure (e.g.mismatch or insecure not allowed).
307: #
308: sub InsecureConnection {
309: my $Socket = shift;
310:
311: # Don't even start if insecure connections are not allowed.
312:
313: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
314: return 0;
315: }
316:
317: # Fabricate a challenge string and send it..
318:
319: my $challenge = "$$".time; # pid + time.
320: print $Socket "$challenge\n";
321: &status("Waiting for challenge reply");
322:
323: my $answer = <$Socket>;
324: $answer =~s/\W//g;
325: if($challenge eq $answer) {
326: return 1;
327: } else {
328: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
329: &status("No challenge reqply");
330: return 0;
331: }
332:
333:
334: }
335: #
336: # Safely execute a command (as long as it's not a shel command and doesn
337: # not require/rely on shell escapes. The function operates by doing a
338: # a pipe based fork and capturing stdout and stderr from the pipe.
339: #
340: # Formal Parameters:
341: # $line - A line of text to be executed as a command.
342: # Returns:
343: # The output from that command. If the output is multiline the caller
344: # must know how to split up the output.
345: #
346: #
347: sub execute_command {
348: my ($line) = @_;
349: my @words = split(/\s/, $line); # Bust the command up into words.
350: my $output = "";
351:
352: my $pid = open(CHILD, "-|");
353:
354: if($pid) { # Parent process
355: Debug("In parent process for execute_command");
356: my @data = <CHILD>; # Read the child's outupt...
357: close CHILD;
358: foreach my $output_line (@data) {
359: Debug("Adding $output_line");
360: $output .= $output_line; # Presumably has a \n on it.
361: }
362:
363: } else { # Child process
364: close (STDERR);
365: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
366: exec(@words); # won't return.
367: }
368: return $output;
369: }
370:
371:
372: # GetCertificate: Given a transaction that requires a certificate,
373: # this function will extract the certificate from the transaction
374: # request. Note that at this point, the only concept of a certificate
375: # is the hostname to which we are connected.
376: #
377: # Parameter:
378: # request - The request sent by our client (this parameterization may
379: # need to change when we really use a certificate granting
380: # authority.
381: #
382: sub GetCertificate {
383: my $request = shift;
384:
385: return $clientip;
386: }
387:
388: #
389: # Return true if client is a manager.
390: #
391: sub isManager {
392: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
393: }
394: #
395: # Return tru if client can do client functions
396: #
397: sub isClient {
398: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
399: }
400:
401:
402: #
403: # ReadManagerTable: Reads in the current manager table. For now this is
404: # done on each manager authentication because:
405: # - These authentications are not frequent
406: # - This allows dynamic changes to the manager table
407: # without the need to signal to the lond.
408: #
409: sub ReadManagerTable {
410:
411: &Debug("Reading manager table");
412: # Clean out the old table first..
413:
414: foreach my $key (keys %managers) {
415: delete $managers{$key};
416: }
417:
418: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
419: if (!open (MANAGERS, $tablename)) {
420: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
421: return;
422: }
423: while(my $host = <MANAGERS>) {
424: chomp($host);
425: if ($host =~ "^#") { # Comment line.
426: next;
427: }
428: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
429: # The entry is of the form:
430: # cluname:hostname
431: # cluname - A 'cluster hostname' is needed in order to negotiate
432: # the host key.
433: # hostname- The dns name of the host.
434: #
435: my($cluname, $dnsname) = split(/:/, $host);
436:
437: my $ip = gethostbyname($dnsname);
438: if(defined($ip)) { # bad names don't deserve entry.
439: my $hostip = inet_ntoa($ip);
440: $managers{$hostip} = $cluname;
441: logthis('<font color="green"> registering manager '.
442: "$dnsname as $cluname with $hostip </font>\n");
443: }
444: } else {
445: logthis('<font color="green"> existing host'." $host</font>\n");
446: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if clumemeber
447: }
448: }
449: }
450:
451: #
452: # ValidManager: Determines if a given certificate represents a valid manager.
453: # in this primitive implementation, the 'certificate' is
454: # just the connecting loncapa client name. This is checked
455: # against a valid client list in the configuration.
456: #
457: #
458: sub ValidManager {
459: my $certificate = shift;
460:
461: return isManager;
462: }
463: #
464: # CopyFile: Called as part of the process of installing a
465: # new configuration file. This function copies an existing
466: # file to a backup file.
467: # Parameters:
468: # oldfile - Name of the file to backup.
469: # newfile - Name of the backup file.
470: # Return:
471: # 0 - Failure (errno has failure reason).
472: # 1 - Success.
473: #
474: sub CopyFile {
475:
476: my ($oldfile, $newfile) = @_;
477:
478: if (! copy($oldfile,$newfile)) {
479: return 0;
480: }
481: chmod(0660, $newfile);
482: return 1;
483: }
484: #
485: # Host files are passed out with externally visible host IPs.
486: # If, for example, we are behind a fire-wall or NAT host, our
487: # internally visible IP may be different than the externally
488: # visible IP. Therefore, we always adjust the contents of the
489: # host file so that the entry for ME is the IP that we believe
490: # we have. At present, this is defined as the entry that
491: # DNS has for us. If by some chance we are not able to get a
492: # DNS translation for us, then we assume that the host.tab file
493: # is correct.
494: # BUGBUGBUG - in the future, we really should see if we can
495: # easily query the interface(s) instead.
496: # Parameter(s):
497: # contents - The contents of the host.tab to check.
498: # Returns:
499: # newcontents - The adjusted contents.
500: #
501: #
502: sub AdjustHostContents {
503: my $contents = shift;
504: my $adjusted;
505: my $me = $perlvar{'lonHostID'};
506:
507: foreach my $line (split(/\n/,$contents)) {
508: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
509: chomp($line);
510: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
511: if ($id eq $me) {
512: my $ip = gethostbyname($name);
513: my $ipnew = inet_ntoa($ip);
514: $ip = $ipnew;
515: # Reconstruct the host line and append to adjusted:
516:
517: my $newline = "$id:$domain:$role:$name:$ip";
518: if($maxcon ne "") { # Not all hosts have loncnew tuning params
519: $newline .= ":$maxcon:$idleto:$mincon";
520: }
521: $adjusted .= $newline."\n";
522:
523: } else { # Not me, pass unmodified.
524: $adjusted .= $line."\n";
525: }
526: } else { # Blank or comment never re-written.
527: $adjusted .= $line."\n"; # Pass blanks and comments as is.
528: }
529: }
530: return $adjusted;
531: }
532: #
533: # InstallFile: Called to install an administrative file:
534: # - The file is created int a temp directory called <name>.tmp
535: # - lcinstall file is called to install the file.
536: # since the web app has no direct write access to the table directory
537: #
538: # Parameters:
539: # Name of the file
540: # File Contents.
541: # Return:
542: # nonzero - success.
543: # 0 - failure and $! has an errno.
544: # Assumptions:
545: # File installtion is a relatively infrequent
546: #
547: sub InstallFile {
548:
549: my ($Filename, $Contents) = @_;
550: # my $TempFile = $Filename.".tmp";
551: my $exedir = $perlvar{'lonDaemons'};
552: my $tmpdir = $exedir.'/tmp/';
553: my $TempFile = $tmpdir."TempTableFile.tmp";
554:
555: # Open the file for write:
556:
557: my $fh = IO::File->new("> $TempFile"); # Write to temp.
558: if(!(defined $fh)) {
559: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
560: return 0;
561: }
562: # write the contents of the file:
563:
564: print $fh ($Contents);
565: $fh->close; # In case we ever have a filesystem w. locking
566:
567: chmod(0664, $TempFile); # Everyone can write it.
568:
569: # Use lcinstall file to put the file in the table directory...
570:
571: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
572: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
573: close $pf;
574: my $err = $?;
575: &Debug("Status is $err");
576: if ($err != 0) {
577: my $msg = $err;
578: if ($err < @installerrors) {
579: $msg = $installerrors[$err];
580: }
581: &logthis("Install failed for table file $Filename : $msg");
582: return 0;
583: }
584:
585: # Remove the temp file:
586:
587: unlink($TempFile);
588:
589: return 1;
590: }
591:
592:
593: #
594: # ConfigFileFromSelector: converts a configuration file selector
595: # into a configuration file pathname.
596: # It's probably no longer necessary to preserve
597: # special handling of hosts or domain as those
598: # files have been superceded by dns_hosts, dns_domain.
599: # The default action is just to prepend the directory
600: # and append .tab
601: #
602: #
603: # Parameters:
604: # selector - Configuration file selector.
605: # Returns:
606: # Full path to the file or undef if the selector is invalid.
607: #
608: sub ConfigFileFromSelector {
609: my $selector = shift;
610: my $tablefile;
611:
612: my $tabledir = $perlvar{'lonTabDir'}.'/';
613: if ($selector eq "hosts") {
614: $tablefile = $tabledir."hosts.tab";
615: } elsif ($selector eq "domain") {
616: $tablefile = $tabledir."domain.tab";
617: } else {
618: $tablefile = $tabledir.$selector.'.tab';
619: }
620: return $tablefile;
621:
622: }
623: #
624: # PushFile: Called to do an administrative push of a file.
625: # - Ensure the file being pushed is one we support.
626: # - Backup the old file to <filename.saved>
627: # - Separate the contents of the new file out from the
628: # rest of the request.
629: # - Write the new file.
630: # Parameter:
631: # Request - The entire user request. This consists of a : separated
632: # string pushfile:tablename:contents.
633: # NOTE: The contents may have :'s in it as well making things a bit
634: # more interesting... but not much.
635: # Returns:
636: # String to send to client ("ok" or "refused" if bad file).
637: #
638: sub PushFile {
639: my $request = shift;
640: my ($command, $filename, $contents) = split(":", $request, 3);
641: &Debug("PushFile");
642:
643: # At this point in time, pushes for only the following tables are
644: # supported:
645: # hosts.tab ($filename eq host).
646: # domain.tab ($filename eq domain).
647: # Construct the destination filename or reject the request.
648: #
649: # lonManage is supposed to ensure this, however this session could be
650: # part of some elaborate spoof that managed somehow to authenticate.
651: #
652:
653:
654: my $tablefile = ConfigFileFromSelector($filename);
655: if(! (defined $tablefile)) {
656: return "refused";
657: }
658:
659: # If the file being pushed is the host file, we adjust the entry for ourself so that the
660: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
661: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
662: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
663: # that possibilty.
664:
665: if($filename eq "host") {
666: $contents = AdjustHostContents($contents);
667: }
668:
669: # Install the new file:
670:
671: &logthis("Installing new $tablefile contents:\n$contents");
672: if(!InstallFile($tablefile, $contents)) {
673: &logthis('<font color="red"> Pushfile: unable to install '
674: .$tablefile." $! </font>");
675: return "error:$!";
676: } else {
677: &logthis('<font color="green"> Installed new '.$tablefile
678: ."</font>");
679:
680: }
681:
682:
683: # Indicate success:
684:
685: return "ok";
686:
687: }
688:
689: #
690: # Called to re-init either lonc or lond.
691: #
692: # Parameters:
693: # request - The full request by the client. This is of the form
694: # reinit:<process>
695: # where <process> is allowed to be either of
696: # lonc or lond
697: #
698: # Returns:
699: # The string to be sent back to the client either:
700: # ok - Everything worked just fine.
701: # error:why - There was a failure and why describes the reason.
702: #
703: #
704: sub ReinitProcess {
705: my $request = shift;
706:
707:
708: # separate the request (reinit) from the process identifier and
709: # validate it producing the name of the .pid file for the process.
710: #
711: #
712: my ($junk, $process) = split(":", $request);
713: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
714: if($process eq 'lonc') {
715: $processpidfile = $processpidfile."lonc.pid";
716: if (!open(PIDFILE, "< $processpidfile")) {
717: return "error:Open failed for $processpidfile";
718: }
719: my $loncpid = <PIDFILE>;
720: close(PIDFILE);
721: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
722: ."</font>");
723: kill("USR2", $loncpid);
724: } elsif ($process eq 'lond') {
725: logthis('<font color="red"> Reinitializing self (lond) </font>');
726: &UpdateHosts; # Lond is us!!
727: } else {
728: &logthis('<font color="yellow" Invalid reinit request for '.$process
729: ."</font>");
730: return "error:Invalid process identifier $process";
731: }
732: return 'ok';
733: }
734: # Validate a line in a configuration file edit script:
735: # Validation includes:
736: # - Ensuring the command is valid.
737: # - Ensuring the command has sufficient parameters
738: # Parameters:
739: # scriptline - A line to validate (\n has been stripped for what it's worth).
740: #
741: # Return:
742: # 0 - Invalid scriptline.
743: # 1 - Valid scriptline
744: # NOTE:
745: # Only the command syntax is checked, not the executability of the
746: # command.
747: #
748: sub isValidEditCommand {
749: my $scriptline = shift;
750:
751: # Line elements are pipe separated:
752:
753: my ($command, $key, $newline) = split(/\|/, $scriptline);
754: &logthis('<font color="green"> isValideditCommand checking: '.
755: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
756:
757: if ($command eq "delete") {
758: #
759: # key with no newline.
760: #
761: if( ($key eq "") || ($newline ne "")) {
762: return 0; # Must have key but no newline.
763: } else {
764: return 1; # Valid syntax.
765: }
766: } elsif ($command eq "replace") {
767: #
768: # key and newline:
769: #
770: if (($key eq "") || ($newline eq "")) {
771: return 0;
772: } else {
773: return 1;
774: }
775: } elsif ($command eq "append") {
776: if (($key ne "") && ($newline eq "")) {
777: return 1;
778: } else {
779: return 0;
780: }
781: } else {
782: return 0; # Invalid command.
783: }
784: return 0; # Should not get here!!!
785: }
786: #
787: # ApplyEdit - Applies an edit command to a line in a configuration
788: # file. It is the caller's responsiblity to validate the
789: # edit line.
790: # Parameters:
791: # $directive - A single edit directive to apply.
792: # Edit directives are of the form:
793: # append|newline - Appends a new line to the file.
794: # replace|key|newline - Replaces the line with key value 'key'
795: # delete|key - Deletes the line with key value 'key'.
796: # $editor - A config file editor object that contains the
797: # file being edited.
798: #
799: sub ApplyEdit {
800:
801: my ($directive, $editor) = @_;
802:
803: # Break the directive down into its command and its parameters
804: # (at most two at this point. The meaning of the parameters, if in fact
805: # they exist depends on the command).
806:
807: my ($command, $p1, $p2) = split(/\|/, $directive);
808:
809: if($command eq "append") {
810: $editor->Append($p1); # p1 - key p2 null.
811: } elsif ($command eq "replace") {
812: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
813: } elsif ($command eq "delete") {
814: $editor->DeleteLine($p1); # p1 - key p2 null.
815: } else { # Should not get here!!!
816: die "Invalid command given to ApplyEdit $command"
817: }
818: }
819: #
820: # AdjustOurHost:
821: # Adjusts a host file stored in a configuration file editor object
822: # for the true IP address of this host. This is necessary for hosts
823: # that live behind a firewall.
824: # Those hosts have a publicly distributed IP of the firewall, but
825: # internally must use their actual IP. We assume that a given
826: # host only has a single IP interface for now.
827: # Formal Parameters:
828: # editor - The configuration file editor to adjust. This
829: # editor is assumed to contain a hosts.tab file.
830: # Strategy:
831: # - Figure out our hostname.
832: # - Lookup the entry for this host.
833: # - Modify the line to contain our IP
834: # - Do a replace for this host.
835: sub AdjustOurHost {
836: my $editor = shift;
837:
838: # figure out who I am.
839:
840: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
841:
842: # Get my host file entry.
843:
844: my $ConfigLine = $editor->Find($myHostName);
845: if(! (defined $ConfigLine)) {
846: die "AdjustOurHost - no entry for me in hosts file $myHostName";
847: }
848: # figure out my IP:
849: # Use the config line to get my hostname.
850: # Use gethostbyname to translate that into an IP address.
851: #
852: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
853: #
854: # Reassemble the config line from the elements in the list.
855: # Note that if the loncnew items were not present before, they will
856: # be now even if they would be empty
857: #
858: my $newConfigLine = $id;
859: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
860: $newConfigLine .= ":".$item;
861: }
862: # Replace the line:
863:
864: $editor->ReplaceLine($id, $newConfigLine);
865:
866: }
867: #
868: # ReplaceConfigFile:
869: # Replaces a configuration file with the contents of a
870: # configuration file editor object.
871: # This is done by:
872: # - Copying the target file to <filename>.old
873: # - Writing the new file to <filename>.tmp
874: # - Moving <filename.tmp> -> <filename>
875: # This laborious process ensures that the system is never without
876: # a configuration file that's at least valid (even if the contents
877: # may be dated).
878: # Parameters:
879: # filename - Name of the file to modify... this is a full path.
880: # editor - Editor containing the file.
881: #
882: sub ReplaceConfigFile {
883:
884: my ($filename, $editor) = @_;
885:
886: CopyFile ($filename, $filename.".old");
887:
888: my $contents = $editor->Get(); # Get the contents of the file.
889:
890: InstallFile($filename, $contents);
891: }
892: #
893: #
894: # Called to edit a configuration table file
895: # Parameters:
896: # request - The entire command/request sent by lonc or lonManage
897: # Return:
898: # The reply to send to the client.
899: #
900: sub EditFile {
901: my $request = shift;
902:
903: # Split the command into it's pieces: edit:filetype:script
904:
905: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
906:
907: # Check the pre-coditions for success:
908:
909: if($cmd != "edit") { # Something is amiss afoot alack.
910: return "error:edit request detected, but request != 'edit'\n";
911: }
912: if( ($filetype ne "hosts") &&
913: ($filetype ne "domain")) {
914: return "error:edit requested with invalid file specifier: $filetype \n";
915: }
916:
917: # Split the edit script and check it's validity.
918:
919: my @scriptlines = split(/\n/, $script); # one line per element.
920: my $linecount = scalar(@scriptlines);
921: for(my $i = 0; $i < $linecount; $i++) {
922: chomp($scriptlines[$i]);
923: if(!isValidEditCommand($scriptlines[$i])) {
924: return "error:edit with bad script line: '$scriptlines[$i]' \n";
925: }
926: }
927:
928: # Execute the edit operation.
929: # - Create a config file editor for the appropriate file and
930: # - execute each command in the script:
931: #
932: my $configfile = ConfigFileFromSelector($filetype);
933: if (!(defined $configfile)) {
934: return "refused\n";
935: }
936: my $editor = ConfigFileEdit->new($configfile);
937:
938: for (my $i = 0; $i < $linecount; $i++) {
939: ApplyEdit($scriptlines[$i], $editor);
940: }
941: # If the file is the host file, ensure that our host is
942: # adjusted to have our ip:
943: #
944: if($filetype eq "host") {
945: AdjustOurHost($editor);
946: }
947: # Finally replace the current file with our file.
948: #
949: ReplaceConfigFile($configfile, $editor);
950:
951: return "ok\n";
952: }
953:
954: # read_profile
955: #
956: # Returns a set of specific entries from a user's profile file.
957: # this is a utility function that is used by both get_profile_entry and
958: # get_profile_entry_encrypted.
959: #
960: # Parameters:
961: # udom - Domain in which the user exists.
962: # uname - User's account name (loncapa account)
963: # namespace - The profile namespace to open.
964: # what - A set of & separated queries.
965: # Returns:
966: # If all ok: - The string that needs to be shipped back to the user.
967: # If failure - A string that starts with error: followed by the failure
968: # reason.. note that this probabyl gets shipped back to the
969: # user as well.
970: #
971: sub read_profile {
972: my ($udom, $uname, $namespace, $what) = @_;
973:
974: my $hashref = &tie_user_hash($udom, $uname, $namespace,
975: &GDBM_READER());
976: if ($hashref) {
977: my @queries=split(/\&/,$what);
978: my $qresult='';
979:
980: for (my $i=0;$i<=$#queries;$i++) {
981: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
982: }
983: $qresult=~s/\&$//; # Remove trailing & from last lookup.
984: if (&untie_user_hash($hashref)) {
985: return $qresult;
986: } else {
987: return "error: ".($!+0)." untie (GDBM) Failed";
988: }
989: } else {
990: if ($!+0 == 2) {
991: return "error:No such file or GDBM reported bad block error";
992: } else {
993: return "error: ".($!+0)." tie (GDBM) Failed";
994: }
995: }
996:
997: }
998: #--------------------- Request Handlers --------------------------------------------
999: #
1000: # By convention each request handler registers itself prior to the sub
1001: # declaration:
1002: #
1003:
1004: #++
1005: #
1006: # Handles ping requests.
1007: # Parameters:
1008: # $cmd - the actual keyword that invoked us.
1009: # $tail - the tail of the request that invoked us.
1010: # $replyfd- File descriptor connected to the client
1011: # Implicit Inputs:
1012: # $currenthostid - Global variable that carries the name of the host we are
1013: # known as.
1014: # Returns:
1015: # 1 - Ok to continue processing.
1016: # 0 - Program should exit.
1017: # Side effects:
1018: # Reply information is sent to the client.
1019: sub ping_handler {
1020: my ($cmd, $tail, $client) = @_;
1021: Debug("$cmd $tail $client .. $currenthostid:");
1022:
1023: Reply( $client,\$currenthostid,"$cmd:$tail");
1024:
1025: return 1;
1026: }
1027: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1028:
1029: #++
1030: #
1031: # Handles pong requests. Pong replies with our current host id, and
1032: # the results of a ping sent to us via our lonc.
1033: #
1034: # Parameters:
1035: # $cmd - the actual keyword that invoked us.
1036: # $tail - the tail of the request that invoked us.
1037: # $replyfd- File descriptor connected to the client
1038: # Implicit Inputs:
1039: # $currenthostid - Global variable that carries the name of the host we are
1040: # connected to.
1041: # Returns:
1042: # 1 - Ok to continue processing.
1043: # 0 - Program should exit.
1044: # Side effects:
1045: # Reply information is sent to the client.
1046: sub pong_handler {
1047: my ($cmd, $tail, $replyfd) = @_;
1048:
1049: my $reply=&Apache::lonnet::reply("ping",$clientname);
1050: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1051: return 1;
1052: }
1053: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1054:
1055: #++
1056: # Called to establish an encrypted session key with the remote client.
1057: # Note that with secure lond, in most cases this function is never
1058: # invoked. Instead, the secure session key is established either
1059: # via a local file that's locked down tight and only lives for a short
1060: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1061: # bits from /dev/urandom, rather than the predictable pattern used by
1062: # by this sub. This sub is only used in the old-style insecure
1063: # key negotiation.
1064: # Parameters:
1065: # $cmd - the actual keyword that invoked us.
1066: # $tail - the tail of the request that invoked us.
1067: # $replyfd- File descriptor connected to the client
1068: # Implicit Inputs:
1069: # $currenthostid - Global variable that carries the name of the host
1070: # known as.
1071: # $clientname - Global variable that carries the name of the hsot we're connected to.
1072: # Returns:
1073: # 1 - Ok to continue processing.
1074: # 0 - Program should exit.
1075: # Implicit Outputs:
1076: # Reply information is sent to the client.
1077: # $cipher is set with a reference to a new IDEA encryption object.
1078: #
1079: sub establish_key_handler {
1080: my ($cmd, $tail, $replyfd) = @_;
1081:
1082: my $buildkey=time.$$.int(rand 100000);
1083: $buildkey=~tr/1-6/A-F/;
1084: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1085: my $key=$currenthostid.$clientname;
1086: $key=~tr/a-z/A-Z/;
1087: $key=~tr/G-P/0-9/;
1088: $key=~tr/Q-Z/0-9/;
1089: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1090: $key=substr($key,0,32);
1091: my $cipherkey=pack("H32",$key);
1092: $cipher=new IDEA $cipherkey;
1093: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1094:
1095: return 1;
1096:
1097: }
1098: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1099:
1100: # Handler for the load command. Returns the current system load average
1101: # to the requestor.
1102: #
1103: # Parameters:
1104: # $cmd - the actual keyword that invoked us.
1105: # $tail - the tail of the request that invoked us.
1106: # $replyfd- File descriptor connected to the client
1107: # Implicit Inputs:
1108: # $currenthostid - Global variable that carries the name of the host
1109: # known as.
1110: # $clientname - Global variable that carries the name of the hsot we're connected to.
1111: # Returns:
1112: # 1 - Ok to continue processing.
1113: # 0 - Program should exit.
1114: # Side effects:
1115: # Reply information is sent to the client.
1116: sub load_handler {
1117: my ($cmd, $tail, $replyfd) = @_;
1118:
1119: # Get the load average from /proc/loadavg and calculate it as a percentage of
1120: # the allowed load limit as set by the perl global variable lonLoadLim
1121:
1122: my $loadavg;
1123: my $loadfile=IO::File->new('/proc/loadavg');
1124:
1125: $loadavg=<$loadfile>;
1126: $loadavg =~ s/\s.*//g; # Extract the first field only.
1127:
1128: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1129:
1130: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1131:
1132: return 1;
1133: }
1134: ®ister_handler("load", \&load_handler, 0, 1, 0);
1135:
1136: #
1137: # Process the userload request. This sub returns to the client the current
1138: # user load average. It can be invoked either by clients or managers.
1139: #
1140: # Parameters:
1141: # $cmd - the actual keyword that invoked us.
1142: # $tail - the tail of the request that invoked us.
1143: # $replyfd- File descriptor connected to the client
1144: # Implicit Inputs:
1145: # $currenthostid - Global variable that carries the name of the host
1146: # known as.
1147: # $clientname - Global variable that carries the name of the hsot we're connected to.
1148: # Returns:
1149: # 1 - Ok to continue processing.
1150: # 0 - Program should exit
1151: # Implicit inputs:
1152: # whatever the userload() function requires.
1153: # Implicit outputs:
1154: # the reply is written to the client.
1155: #
1156: sub user_load_handler {
1157: my ($cmd, $tail, $replyfd) = @_;
1158:
1159: my $userloadpercent=&Apache::lonnet::userload();
1160: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1161:
1162: return 1;
1163: }
1164: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1165:
1166: # Process a request for the authorization type of a user:
1167: # (userauth).
1168: #
1169: # Parameters:
1170: # $cmd - the actual keyword that invoked us.
1171: # $tail - the tail of the request that invoked us.
1172: # $replyfd- File descriptor connected to the client
1173: # Returns:
1174: # 1 - Ok to continue processing.
1175: # 0 - Program should exit
1176: # Implicit outputs:
1177: # The user authorization type is written to the client.
1178: #
1179: sub user_authorization_type {
1180: my ($cmd, $tail, $replyfd) = @_;
1181:
1182: my $userinput = "$cmd:$tail";
1183:
1184: # Pull the domain and username out of the command tail.
1185: # and call get_auth_type to determine the authentication type.
1186:
1187: my ($udom,$uname)=split(/:/,$tail);
1188: my $result = &get_auth_type($udom, $uname);
1189: if($result eq "nouser") {
1190: &Failure( $replyfd, "unknown_user\n", $userinput);
1191: } else {
1192: #
1193: # We only want to pass the second field from get_auth_type
1194: # for ^krb.. otherwise we'll be handing out the encrypted
1195: # password for internals e.g.
1196: #
1197: my ($type,$otherinfo) = split(/:/,$result);
1198: if($type =~ /^krb/) {
1199: $type = $result;
1200: } else {
1201: $type .= ':';
1202: }
1203: &Reply( $replyfd, \$type, $userinput);
1204: }
1205:
1206: return 1;
1207: }
1208: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1209:
1210: # Process a request by a manager to push a hosts or domain table
1211: # to us. We pick apart the command and pass it on to the subs
1212: # that already exist to do this.
1213: #
1214: # Parameters:
1215: # $cmd - the actual keyword that invoked us.
1216: # $tail - the tail of the request that invoked us.
1217: # $client - File descriptor connected to the client
1218: # Returns:
1219: # 1 - Ok to continue processing.
1220: # 0 - Program should exit
1221: # Implicit Output:
1222: # a reply is written to the client.
1223: sub push_file_handler {
1224: my ($cmd, $tail, $client) = @_;
1225: &Debug("In push file handler");
1226: my $userinput = "$cmd:$tail";
1227:
1228: # At this time we only know that the IP of our partner is a valid manager
1229: # the code below is a hook to do further authentication (e.g. to resolve
1230: # spoofing).
1231:
1232: my $cert = &GetCertificate($userinput);
1233: if(&ValidManager($cert)) {
1234: &Debug("Valid manager: $client");
1235:
1236: # Now presumably we have the bona fides of both the peer host and the
1237: # process making the request.
1238:
1239: my $reply = &PushFile($userinput);
1240: &Reply($client, \$reply, $userinput);
1241:
1242: } else {
1243: &logthis("push_file_handler $client is not valid");
1244: &Failure( $client, "refused\n", $userinput);
1245: }
1246: return 1;
1247: }
1248: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1249:
1250: # The du_handler routine should be considered obsolete and is retained
1251: # for communication with legacy servers. Please see the du2_handler.
1252: #
1253: # du - list the disk usage of a directory recursively.
1254: #
1255: # note: stolen code from the ls file handler
1256: # under construction by Rick Banghart
1257: # .
1258: # Parameters:
1259: # $cmd - The command that dispatched us (du).
1260: # $ududir - The directory path to list... I'm not sure what this
1261: # is relative as things like ls:. return e.g.
1262: # no_such_dir.
1263: # $client - Socket open on the client.
1264: # Returns:
1265: # 1 - indicating that the daemon should not disconnect.
1266: # Side Effects:
1267: # The reply is written to $client.
1268: #
1269: sub du_handler {
1270: my ($cmd, $ududir, $client) = @_;
1271: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1272: my $userinput = "$cmd:$ududir";
1273:
1274: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1275: &Failure($client,"refused\n","$cmd:$ududir");
1276: return 1;
1277: }
1278: # Since $ududir could have some nasties in it,
1279: # we will require that ududir is a valid
1280: # directory. Just in case someone tries to
1281: # slip us a line like .;(cd /home/httpd rm -rf*)
1282: # etc.
1283: #
1284: if (-d $ududir) {
1285: my $total_size=0;
1286: my $code=sub {
1287: if ($_=~/\.\d+\./) { return;}
1288: if ($_=~/\.meta$/) { return;}
1289: if (-d $_) { return;}
1290: $total_size+=(stat($_))[7];
1291: };
1292: chdir($ududir);
1293: find($code,$ududir);
1294: $total_size=int($total_size/1024);
1295: &Reply($client,\$total_size,"$cmd:$ududir");
1296: } else {
1297: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1298: }
1299: return 1;
1300: }
1301: ®ister_handler("du", \&du_handler, 0, 1, 0);
1302:
1303: # Please also see the du_handler, which is obsoleted by du2.
1304: # du2_handler differs from du_handler in that required path to directory
1305: # provided by &propath() is prepended in the handler instead of on the
1306: # client side.
1307: #
1308: # du2 - list the disk usage of a directory recursively.
1309: #
1310: # Parameters:
1311: # $cmd - The command that dispatched us (du).
1312: # $tail - The tail of the request that invoked us.
1313: # $tail is a : separated list of the following:
1314: # - $ududir - directory path to list (before prepending)
1315: # - $getpropath = 1 if &propath() should prepend
1316: # - $uname - username to use for &propath or user dir
1317: # - $udom - domain to use for &propath or user dir
1318: # All are escaped.
1319: # $client - Socket open on the client.
1320: # Returns:
1321: # 1 - indicating that the daemon should not disconnect.
1322: # Side Effects:
1323: # The reply is written to $client.
1324: #
1325:
1326: sub du2_handler {
1327: my ($cmd, $tail, $client) = @_;
1328: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1329: my $userinput = "$cmd:$tail";
1330: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1331: &Failure($client,"refused\n","$cmd:$tail");
1332: return 1;
1333: }
1334: if ($getpropath) {
1335: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1336: $ududir = &propath($udom,$uname).'/'.$ududir;
1337: } else {
1338: &Failure($client,"refused\n","$cmd:$tail");
1339: return 1;
1340: }
1341: }
1342: # Since $ududir could have some nasties in it,
1343: # we will require that ududir is a valid
1344: # directory. Just in case someone tries to
1345: # slip us a line like .;(cd /home/httpd rm -rf*)
1346: # etc.
1347: #
1348: if (-d $ududir) {
1349: my $total_size=0;
1350: my $code=sub {
1351: if ($_=~/\.\d+\./) { return;}
1352: if ($_=~/\.meta$/) { return;}
1353: if (-d $_) { return;}
1354: $total_size+=(stat($_))[7];
1355: };
1356: chdir($ududir);
1357: find($code,$ududir);
1358: $total_size=int($total_size/1024);
1359: &Reply($client,\$total_size,"$cmd:$ududir");
1360: } else {
1361: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1362: }
1363: return 1;
1364: }
1365: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1366:
1367: #
1368: # The ls_handler routine should be considered obsolete and is retained
1369: # for communication with legacy servers. Please see the ls3_handler.
1370: #
1371: # ls - list the contents of a directory. For each file in the
1372: # selected directory the filename followed by the full output of
1373: # the stat function is returned. The returned info for each
1374: # file are separated by ':'. The stat fields are separated by &'s.
1375: # Parameters:
1376: # $cmd - The command that dispatched us (ls).
1377: # $ulsdir - The directory path to list... I'm not sure what this
1378: # is relative as things like ls:. return e.g.
1379: # no_such_dir.
1380: # $client - Socket open on the client.
1381: # Returns:
1382: # 1 - indicating that the daemon should not disconnect.
1383: # Side Effects:
1384: # The reply is written to $client.
1385: #
1386: sub ls_handler {
1387: # obsoleted by ls2_handler
1388: my ($cmd, $ulsdir, $client) = @_;
1389:
1390: my $userinput = "$cmd:$ulsdir";
1391:
1392: my $obs;
1393: my $rights;
1394: my $ulsout='';
1395: my $ulsfn;
1396: if (-e $ulsdir) {
1397: if(-d $ulsdir) {
1398: if (opendir(LSDIR,$ulsdir)) {
1399: while ($ulsfn=readdir(LSDIR)) {
1400: undef($obs);
1401: undef($rights);
1402: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1403: #We do some obsolete checking here
1404: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1405: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1406: my @obsolete=<FILE>;
1407: foreach my $obsolete (@obsolete) {
1408: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1409: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1410: }
1411: }
1412: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1413: if($obs eq '1') { $ulsout.="&1"; }
1414: else { $ulsout.="&0"; }
1415: if($rights eq '1') { $ulsout.="&1:"; }
1416: else { $ulsout.="&0:"; }
1417: }
1418: closedir(LSDIR);
1419: }
1420: } else {
1421: my @ulsstats=stat($ulsdir);
1422: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1423: }
1424: } else {
1425: $ulsout='no_such_dir';
1426: }
1427: if ($ulsout eq '') { $ulsout='empty'; }
1428: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1429:
1430: return 1;
1431:
1432: }
1433: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1434:
1435: # The ls2_handler routine should be considered obsolete and is retained
1436: # for communication with legacy servers. Please see the ls3_handler.
1437: # Please also see the ls_handler, which was itself obsoleted by ls2.
1438: # ls2_handler differs from ls_handler in that it escapes its return
1439: # values before concatenating them together with ':'s.
1440: #
1441: # ls2 - list the contents of a directory. For each file in the
1442: # selected directory the filename followed by the full output of
1443: # the stat function is returned. The returned info for each
1444: # file are separated by ':'. The stat fields are separated by &'s.
1445: # Parameters:
1446: # $cmd - The command that dispatched us (ls).
1447: # $ulsdir - The directory path to list... I'm not sure what this
1448: # is relative as things like ls:. return e.g.
1449: # no_such_dir.
1450: # $client - Socket open on the client.
1451: # Returns:
1452: # 1 - indicating that the daemon should not disconnect.
1453: # Side Effects:
1454: # The reply is written to $client.
1455: #
1456: sub ls2_handler {
1457: my ($cmd, $ulsdir, $client) = @_;
1458:
1459: my $userinput = "$cmd:$ulsdir";
1460:
1461: my $obs;
1462: my $rights;
1463: my $ulsout='';
1464: my $ulsfn;
1465: if (-e $ulsdir) {
1466: if(-d $ulsdir) {
1467: if (opendir(LSDIR,$ulsdir)) {
1468: while ($ulsfn=readdir(LSDIR)) {
1469: undef($obs);
1470: undef($rights);
1471: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1472: #We do some obsolete checking here
1473: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1474: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1475: my @obsolete=<FILE>;
1476: foreach my $obsolete (@obsolete) {
1477: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1478: if($obsolete =~ m|(<copyright>)(default)|) {
1479: $rights = 1;
1480: }
1481: }
1482: }
1483: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1484: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1485: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1486: $ulsout.= &escape($tmp).':';
1487: }
1488: closedir(LSDIR);
1489: }
1490: } else {
1491: my @ulsstats=stat($ulsdir);
1492: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1493: }
1494: } else {
1495: $ulsout='no_such_dir';
1496: }
1497: if ($ulsout eq '') { $ulsout='empty'; }
1498: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1499: return 1;
1500: }
1501: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1502: #
1503: # ls3 - list the contents of a directory. For each file in the
1504: # selected directory the filename followed by the full output of
1505: # the stat function is returned. The returned info for each
1506: # file are separated by ':'. The stat fields are separated by &'s.
1507: # Parameters:
1508: # $cmd - The command that dispatched us (ls).
1509: # $tail - The tail of the request that invoked us.
1510: # $tail is a : separated list of the following:
1511: # - $ulsdir - directory path to list (before prepending)
1512: # - $getpropath = 1 if &propath() should prepend
1513: # - $getuserdir = 1 if path to user dir in lonUsers should
1514: # prepend
1515: # - $alternate_root - path to prepend
1516: # - $uname - username to use for &propath or user dir
1517: # - $udom - domain to use for &propath or user dir
1518: # All of these except $getpropath and &getuserdir are escaped.
1519: # no_such_dir.
1520: # $client - Socket open on the client.
1521: # Returns:
1522: # 1 - indicating that the daemon should not disconnect.
1523: # Side Effects:
1524: # The reply is written to $client.
1525: #
1526:
1527: sub ls3_handler {
1528: my ($cmd, $tail, $client) = @_;
1529: my $userinput = "$cmd:$tail";
1530: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1531: split(/:/,$tail);
1532: if (defined($ulsdir)) {
1533: $ulsdir = &unescape($ulsdir);
1534: }
1535: if (defined($alternate_root)) {
1536: $alternate_root = &unescape($alternate_root);
1537: }
1538: if (defined($uname)) {
1539: $uname = &unescape($uname);
1540: }
1541: if (defined($udom)) {
1542: $udom = &unescape($udom);
1543: }
1544:
1545: my $dir_root = $perlvar{'lonDocRoot'};
1546: if ($getpropath) {
1547: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1548: $dir_root = &propath($udom,$uname);
1549: $dir_root =~ s/\/$//;
1550: } else {
1551: &Failure($client,"refused\n","$cmd:$tail");
1552: return 1;
1553: }
1554: } elsif ($getuserdir) {
1555: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1556: my $subdir=$uname.'__';
1557: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1558: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1559: ."/$udom/$subdir/$uname";
1560: } else {
1561: &Failure($client,"refused\n","$cmd:$tail");
1562: return 1;
1563: }
1564: } elsif ($alternate_root ne '') {
1565: $dir_root = $alternate_root;
1566: }
1567: if (($dir_root ne '') && ($dir_root ne '/')) {
1568: if ($ulsdir =~ /^\//) {
1569: $ulsdir = $dir_root.$ulsdir;
1570: } else {
1571: $ulsdir = $dir_root.'/'.$ulsdir;
1572: }
1573: }
1574: my $obs;
1575: my $rights;
1576: my $ulsout='';
1577: my $ulsfn;
1578: if (-e $ulsdir) {
1579: if(-d $ulsdir) {
1580: if (opendir(LSDIR,$ulsdir)) {
1581: while ($ulsfn=readdir(LSDIR)) {
1582: undef($obs);
1583: undef($rights);
1584: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1585: #We do some obsolete checking here
1586: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1587: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1588: my @obsolete=<FILE>;
1589: foreach my $obsolete (@obsolete) {
1590: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1591: if($obsolete =~ m|(<copyright>)(default)|) {
1592: $rights = 1;
1593: }
1594: }
1595: }
1596: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1597: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1598: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1599: $ulsout.= &escape($tmp).':';
1600: }
1601: closedir(LSDIR);
1602: }
1603: } else {
1604: my @ulsstats=stat($ulsdir);
1605: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1606: }
1607: } else {
1608: $ulsout='no_such_dir';
1609: }
1610: if ($ulsout eq '') { $ulsout='empty'; }
1611: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1612: return 1;
1613: }
1614: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1615:
1616: sub server_timezone_handler {
1617: my ($cmd,$tail,$client) = @_;
1618: my $userinput = "$cmd:$tail";
1619: my $timezone;
1620: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1621: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1622: if (-e $clockfile) {
1623: if (open(my $fh,"<$clockfile")) {
1624: while (<$fh>) {
1625: next if (/^[\#\s]/);
1626: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1627: $timezone = $1;
1628: last;
1629: }
1630: }
1631: close($fh);
1632: }
1633: } elsif (-e $tzfile) {
1634: if (open(my $fh,"<$tzfile")) {
1635: $timezone = <$fh>;
1636: close($fh);
1637: chomp($timezone);
1638: if ($timezone =~ m{^Etc/(\w+)$}) {
1639: $timezone = $1;
1640: }
1641: }
1642: }
1643: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1644: return 1;
1645: }
1646: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1647:
1648: sub server_loncaparev_handler {
1649: my ($cmd,$tail,$client) = @_;
1650: my $userinput = "$cmd:$tail";
1651: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1652: return 1;
1653: }
1654: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1655:
1656: # Process a reinit request. Reinit requests that either
1657: # lonc or lond be reinitialized so that an updated
1658: # host.tab or domain.tab can be processed.
1659: #
1660: # Parameters:
1661: # $cmd - the actual keyword that invoked us.
1662: # $tail - the tail of the request that invoked us.
1663: # $client - File descriptor connected to the client
1664: # Returns:
1665: # 1 - Ok to continue processing.
1666: # 0 - Program should exit
1667: # Implicit output:
1668: # a reply is sent to the client.
1669: #
1670: sub reinit_process_handler {
1671: my ($cmd, $tail, $client) = @_;
1672:
1673: my $userinput = "$cmd:$tail";
1674:
1675: my $cert = &GetCertificate($userinput);
1676: if(&ValidManager($cert)) {
1677: chomp($userinput);
1678: my $reply = &ReinitProcess($userinput);
1679: &Reply( $client, \$reply, $userinput);
1680: } else {
1681: &Failure( $client, "refused\n", $userinput);
1682: }
1683: return 1;
1684: }
1685: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1686:
1687: # Process the editing script for a table edit operation.
1688: # the editing operation must be encrypted and requested by
1689: # a manager host.
1690: #
1691: # Parameters:
1692: # $cmd - the actual keyword that invoked us.
1693: # $tail - the tail of the request that invoked us.
1694: # $client - File descriptor connected to the client
1695: # Returns:
1696: # 1 - Ok to continue processing.
1697: # 0 - Program should exit
1698: # Implicit output:
1699: # a reply is sent to the client.
1700: #
1701: sub edit_table_handler {
1702: my ($command, $tail, $client) = @_;
1703:
1704: my $userinput = "$command:$tail";
1705:
1706: my $cert = &GetCertificate($userinput);
1707: if(&ValidManager($cert)) {
1708: my($filetype, $script) = split(/:/, $tail);
1709: if (($filetype eq "hosts") ||
1710: ($filetype eq "domain")) {
1711: if($script ne "") {
1712: &Reply($client, # BUGBUG - EditFile
1713: &EditFile($userinput), # could fail.
1714: $userinput);
1715: } else {
1716: &Failure($client,"refused\n",$userinput);
1717: }
1718: } else {
1719: &Failure($client,"refused\n",$userinput);
1720: }
1721: } else {
1722: &Failure($client,"refused\n",$userinput);
1723: }
1724: return 1;
1725: }
1726: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1727:
1728: #
1729: # Authenticate a user against the LonCAPA authentication
1730: # database. Note that there are several authentication
1731: # possibilities:
1732: # - unix - The user can be authenticated against the unix
1733: # password file.
1734: # - internal - The user can be authenticated against a purely
1735: # internal per user password file.
1736: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1737: # ticket granting authority.
1738: # - user - The person tailoring LonCAPA can supply a user authentication
1739: # mechanism that is per system.
1740: #
1741: # Parameters:
1742: # $cmd - The command that got us here.
1743: # $tail - Tail of the command (remaining parameters).
1744: # $client - File descriptor connected to client.
1745: # Returns
1746: # 0 - Requested to exit, caller should shut down.
1747: # 1 - Continue processing.
1748: # Implicit inputs:
1749: # The authentication systems describe above have their own forms of implicit
1750: # input into the authentication process that are described above.
1751: #
1752: sub authenticate_handler {
1753: my ($cmd, $tail, $client) = @_;
1754:
1755:
1756: # Regenerate the full input line
1757:
1758: my $userinput = $cmd.":".$tail;
1759:
1760: # udom - User's domain.
1761: # uname - Username.
1762: # upass - User's password.
1763: # checkdefauth - Pass to validate_user() to try authentication
1764: # with default auth type(s) if no user account.
1765:
1766: my ($udom, $uname, $upass, $checkdefauth)=split(/:/,$tail);
1767: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
1768: chomp($upass);
1769: $upass=&unescape($upass);
1770:
1771: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1772: if($pwdcorrect) {
1773: &Reply( $client, "authorized\n", $userinput);
1774: #
1775: # Bad credentials: Failed to authorize
1776: #
1777: } else {
1778: &Failure( $client, "non_authorized\n", $userinput);
1779: }
1780:
1781: return 1;
1782: }
1783: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1784:
1785: #
1786: # Change a user's password. Note that this function is complicated by
1787: # the fact that a user may be authenticated in more than one way:
1788: # At present, we are not able to change the password for all types of
1789: # authentication methods. Only for:
1790: # unix - unix password or shadow passoword style authentication.
1791: # local - Locally written authentication mechanism.
1792: # For now, kerb4 and kerb5 password changes are not supported and result
1793: # in an error.
1794: # FUTURE WORK:
1795: # Support kerberos passwd changes?
1796: # Parameters:
1797: # $cmd - The command that got us here.
1798: # $tail - Tail of the command (remaining parameters).
1799: # $client - File descriptor connected to client.
1800: # Returns
1801: # 0 - Requested to exit, caller should shut down.
1802: # 1 - Continue processing.
1803: # Implicit inputs:
1804: # The authentication systems describe above have their own forms of implicit
1805: # input into the authentication process that are described above.
1806: sub change_password_handler {
1807: my ($cmd, $tail, $client) = @_;
1808:
1809: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1810:
1811: #
1812: # udom - user's domain.
1813: # uname - Username.
1814: # upass - Current password.
1815: # npass - New password.
1816: # context - Context in which this was called
1817: # (preferences or reset_by_email).
1818: # lonhost - HostID of server where request originated
1819:
1820: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1821:
1822: $upass=&unescape($upass);
1823: $npass=&unescape($npass);
1824: &Debug("Trying to change password for $uname");
1825:
1826: # First require that the user can be authenticated with their
1827: # old password unless context was 'reset_by_email':
1828:
1829: my ($validated,$failure);
1830: if ($context eq 'reset_by_email') {
1831: if ($lonhost eq '') {
1832: $failure = 'invalid_client';
1833: } else {
1834: $validated = 1;
1835: }
1836: } else {
1837: $validated = &validate_user($udom, $uname, $upass);
1838: }
1839: if($validated) {
1840: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1841:
1842: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1843: if ($howpwd eq 'internal') {
1844: &Debug("internal auth");
1845: my $salt=time;
1846: $salt=substr($salt,6,2);
1847: my $ncpass=crypt($npass,$salt);
1848: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1849: my $msg="Result of password change for $uname: pwchange_success";
1850: if ($lonhost) {
1851: $msg .= " - request originated from: $lonhost";
1852: }
1853: &logthis($msg);
1854: &Reply($client, "ok\n", $userinput);
1855: } else {
1856: &logthis("Unable to open $uname passwd "
1857: ."to change password");
1858: &Failure( $client, "non_authorized\n",$userinput);
1859: }
1860: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1861: my $result = &change_unix_password($uname, $npass);
1862: &logthis("Result of password change for $uname: ".
1863: $result);
1864: &Reply($client, \$result, $userinput);
1865: } else {
1866: # this just means that the current password mode is not
1867: # one we know how to change (e.g the kerberos auth modes or
1868: # locally written auth handler).
1869: #
1870: &Failure( $client, "auth_mode_error\n", $userinput);
1871: }
1872:
1873: } else {
1874: if ($failure eq '') {
1875: $failure = 'non_authorized';
1876: }
1877: &Failure( $client, "$failure\n", $userinput);
1878: }
1879:
1880: return 1;
1881: }
1882: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1883:
1884: #
1885: # Create a new user. User in this case means a lon-capa user.
1886: # The user must either already exist in some authentication realm
1887: # like kerberos or the /etc/passwd. If not, a user completely local to
1888: # this loncapa system is created.
1889: #
1890: # Parameters:
1891: # $cmd - The command that got us here.
1892: # $tail - Tail of the command (remaining parameters).
1893: # $client - File descriptor connected to client.
1894: # Returns
1895: # 0 - Requested to exit, caller should shut down.
1896: # 1 - Continue processing.
1897: # Implicit inputs:
1898: # The authentication systems describe above have their own forms of implicit
1899: # input into the authentication process that are described above.
1900: sub add_user_handler {
1901:
1902: my ($cmd, $tail, $client) = @_;
1903:
1904:
1905: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1906: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1907:
1908: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1909:
1910:
1911: if($udom eq $currentdomainid) { # Reject new users for other domains...
1912:
1913: my $oldumask=umask(0077);
1914: chomp($npass);
1915: $npass=&unescape($npass);
1916: my $passfilename = &password_path($udom, $uname);
1917: &Debug("Password file created will be:".$passfilename);
1918: if (-e $passfilename) {
1919: &Failure( $client, "already_exists\n", $userinput);
1920: } else {
1921: my $fperror='';
1922: if (!&mkpath($passfilename)) {
1923: $fperror="error: ".($!+0)." mkdir failed while attempting "
1924: ."makeuser";
1925: }
1926: unless ($fperror) {
1927: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1928: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
1929: } else {
1930: &Failure($client, \$fperror, $userinput);
1931: }
1932: }
1933: umask($oldumask);
1934: } else {
1935: &Failure($client, "not_right_domain\n",
1936: $userinput); # Even if we are multihomed.
1937:
1938: }
1939: return 1;
1940:
1941: }
1942: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1943:
1944: #
1945: # Change the authentication method of a user. Note that this may
1946: # also implicitly change the user's password if, for example, the user is
1947: # joining an existing authentication realm. Known authentication realms at
1948: # this time are:
1949: # internal - Purely internal password file (only loncapa knows this user)
1950: # local - Institutionally written authentication module.
1951: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1952: # kerb4 - kerberos version 4
1953: # kerb5 - kerberos version 5
1954: #
1955: # Parameters:
1956: # $cmd - The command that got us here.
1957: # $tail - Tail of the command (remaining parameters).
1958: # $client - File descriptor connected to client.
1959: # Returns
1960: # 0 - Requested to exit, caller should shut down.
1961: # 1 - Continue processing.
1962: # Implicit inputs:
1963: # The authentication systems describe above have their own forms of implicit
1964: # input into the authentication process that are described above.
1965: # NOTE:
1966: # This is also used to change the authentication credential values (e.g. passwd).
1967: #
1968: #
1969: sub change_authentication_handler {
1970:
1971: my ($cmd, $tail, $client) = @_;
1972:
1973: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1974:
1975: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1976: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1977: if ($udom ne $currentdomainid) {
1978: &Failure( $client, "not_right_domain\n", $client);
1979: } else {
1980:
1981: chomp($npass);
1982:
1983: $npass=&unescape($npass);
1984: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1985: my $passfilename = &password_path($udom, $uname);
1986: if ($passfilename) { # Not allowed to create a new user!!
1987: # If just changing the unix passwd. need to arrange to run
1988: # passwd since otherwise make_passwd_file will run
1989: # lcuseradd which fails if an account already exists
1990: # (to prevent an unscrupulous LONCAPA admin from stealing
1991: # an existing account by overwriting it as a LonCAPA account).
1992:
1993: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1994: my $result = &change_unix_password($uname, $npass);
1995: &logthis("Result of password change for $uname: ".$result);
1996: if ($result eq "ok") {
1997: &Reply($client, \$result);
1998: } else {
1999: &Failure($client, \$result);
2000: }
2001: } else {
2002: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
2003: #
2004: # If the current auth mode is internal, and the old auth mode was
2005: # unix, or krb*, and the user is an author for this domain,
2006: # re-run manage_permissions for that role in order to be able
2007: # to take ownership of the construction space back to www:www
2008: #
2009:
2010:
2011: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
2012: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
2013: if(&is_author($udom, $uname)) {
2014: &Debug(" Need to manage author permissions...");
2015: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
2016: }
2017: }
2018: &Reply($client, \$result, $userinput);
2019: }
2020:
2021:
2022: } else {
2023: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2024: }
2025: }
2026: return 1;
2027: }
2028: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2029:
2030: #
2031: # Determines if this is the home server for a user. The home server
2032: # for a user will have his/her lon-capa passwd file. Therefore all we need
2033: # to do is determine if this file exists.
2034: #
2035: # Parameters:
2036: # $cmd - The command that got us here.
2037: # $tail - Tail of the command (remaining parameters).
2038: # $client - File descriptor connected to client.
2039: # Returns
2040: # 0 - Requested to exit, caller should shut down.
2041: # 1 - Continue processing.
2042: # Implicit inputs:
2043: # The authentication systems describe above have their own forms of implicit
2044: # input into the authentication process that are described above.
2045: #
2046: sub is_home_handler {
2047: my ($cmd, $tail, $client) = @_;
2048:
2049: my $userinput = "$cmd:$tail";
2050:
2051: my ($udom,$uname)=split(/:/,$tail);
2052: chomp($uname);
2053: my $passfile = &password_filename($udom, $uname);
2054: if($passfile) {
2055: &Reply( $client, "found\n", $userinput);
2056: } else {
2057: &Failure($client, "not_found\n", $userinput);
2058: }
2059: return 1;
2060: }
2061: ®ister_handler("home", \&is_home_handler, 0,1,0);
2062:
2063: #
2064: # Process an update request for a resource?? I think what's going on here is
2065: # that a resource has been modified that we hold a subscription to.
2066: # If the resource is not local, then we must update, or at least invalidate our
2067: # cached copy of the resource.
2068: # FUTURE WORK:
2069: # I need to look at this logic carefully. My druthers would be to follow
2070: # typical caching logic, and simple invalidate the cache, drop any subscription
2071: # an let the next fetch start the ball rolling again... however that may
2072: # actually be more difficult than it looks given the complex web of
2073: # proxy servers.
2074: # Parameters:
2075: # $cmd - The command that got us here.
2076: # $tail - Tail of the command (remaining parameters).
2077: # $client - File descriptor connected to client.
2078: # Returns
2079: # 0 - Requested to exit, caller should shut down.
2080: # 1 - Continue processing.
2081: # Implicit inputs:
2082: # The authentication systems describe above have their own forms of implicit
2083: # input into the authentication process that are described above.
2084: #
2085: sub update_resource_handler {
2086:
2087: my ($cmd, $tail, $client) = @_;
2088:
2089: my $userinput = "$cmd:$tail";
2090:
2091: my $fname= $tail; # This allows interactive testing
2092:
2093:
2094: my $ownership=ishome($fname);
2095: if ($ownership eq 'not_owner') {
2096: if (-e $fname) {
2097: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2098: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2099: my $now=time;
2100: my $since=$now-$atime;
2101: if ($since>$perlvar{'lonExpire'}) {
2102: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2103: &devalidate_meta_cache($fname);
2104: unlink("$fname");
2105: unlink("$fname.meta");
2106: } else {
2107: my $transname="$fname.in.transfer";
2108: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2109: my $response;
2110: alarm(120);
2111: {
2112: my $ua=new LWP::UserAgent;
2113: my $request=new HTTP::Request('GET',"$remoteurl");
2114: $response=$ua->request($request,$transname);
2115: }
2116: alarm(0);
2117: if ($response->is_error()) {
2118: unlink($transname);
2119: my $message=$response->status_line;
2120: &logthis("LWP GET: $message for $fname ($remoteurl)");
2121: } else {
2122: if ($remoteurl!~/\.meta$/) {
2123: alarm(120);
2124: {
2125: my $ua=new LWP::UserAgent;
2126: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2127: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2128: if ($mresponse->is_error()) {
2129: unlink($fname.'.meta');
2130: }
2131: }
2132: alarm(0);
2133: }
2134: rename($transname,$fname);
2135: &devalidate_meta_cache($fname);
2136: }
2137: }
2138: &Reply( $client, "ok\n", $userinput);
2139: } else {
2140: &Failure($client, "not_found\n", $userinput);
2141: }
2142: } else {
2143: &Failure($client, "rejected\n", $userinput);
2144: }
2145: return 1;
2146: }
2147: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2148:
2149: sub devalidate_meta_cache {
2150: my ($url) = @_;
2151: use Cache::Memcached;
2152: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2153: $url = &Apache::lonnet::declutter($url);
2154: $url =~ s-\.meta$--;
2155: my $id = &escape('meta:'.$url);
2156: $memcache->delete($id);
2157: }
2158:
2159: #
2160: # Fetch a user file from a remote server to the user's home directory
2161: # userfiles subdir.
2162: # Parameters:
2163: # $cmd - The command that got us here.
2164: # $tail - Tail of the command (remaining parameters).
2165: # $client - File descriptor connected to client.
2166: # Returns
2167: # 0 - Requested to exit, caller should shut down.
2168: # 1 - Continue processing.
2169: #
2170: sub fetch_user_file_handler {
2171:
2172: my ($cmd, $tail, $client) = @_;
2173:
2174: my $userinput = "$cmd:$tail";
2175: my $fname = $tail;
2176: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2177: my $udir=&propath($udom,$uname).'/userfiles';
2178: unless (-e $udir) {
2179: mkdir($udir,0770);
2180: }
2181: Debug("fetch user file for $fname");
2182: if (-e $udir) {
2183: $ufile=~s/^[\.\~]+//;
2184:
2185: # IF necessary, create the path right down to the file.
2186: # Note that any regular files in the way of this path are
2187: # wiped out to deal with some earlier folly of mine.
2188:
2189: if (!&mkpath($udir.'/'.$ufile)) {
2190: &Failure($client, "unable_to_create\n", $userinput);
2191: }
2192:
2193: my $destname=$udir.'/'.$ufile;
2194: my $transname=$udir.'/'.$ufile.'.in.transit';
2195: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2196: my $response;
2197: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2198: alarm(120);
2199: {
2200: my $ua=new LWP::UserAgent;
2201: my $request=new HTTP::Request('GET',"$remoteurl");
2202: $response=$ua->request($request,$transname);
2203: }
2204: alarm(0);
2205: if ($response->is_error()) {
2206: unlink($transname);
2207: my $message=$response->status_line;
2208: &logthis("LWP GET: $message for $fname ($remoteurl)");
2209: &Failure($client, "failed\n", $userinput);
2210: } else {
2211: Debug("Renaming $transname to $destname");
2212: if (!rename($transname,$destname)) {
2213: &logthis("Unable to move $transname to $destname");
2214: unlink($transname);
2215: &Failure($client, "failed\n", $userinput);
2216: } else {
2217: &Reply($client, "ok\n", $userinput);
2218: }
2219: }
2220: } else {
2221: &Failure($client, "not_home\n", $userinput);
2222: }
2223: return 1;
2224: }
2225: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2226:
2227: #
2228: # Remove a file from a user's home directory userfiles subdirectory.
2229: # Parameters:
2230: # cmd - the Lond request keyword that got us here.
2231: # tail - the part of the command past the keyword.
2232: # client- File descriptor connected with the client.
2233: #
2234: # Returns:
2235: # 1 - Continue processing.
2236: sub remove_user_file_handler {
2237: my ($cmd, $tail, $client) = @_;
2238:
2239: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2240:
2241: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2242: if ($ufile =~m|/\.\./|) {
2243: # any files paths with /../ in them refuse
2244: # to deal with
2245: &Failure($client, "refused\n", "$cmd:$tail");
2246: } else {
2247: my $udir = &propath($udom,$uname);
2248: if (-e $udir) {
2249: my $file=$udir.'/userfiles/'.$ufile;
2250: if (-e $file) {
2251: #
2252: # If the file is a regular file unlink is fine...
2253: # However it's possible the client wants a dir.
2254: # removed, in which case rmdir is more approprate:
2255: #
2256: if (-f $file){
2257: unlink($file);
2258: } elsif(-d $file) {
2259: rmdir($file);
2260: }
2261: if (-e $file) {
2262: # File is still there after we deleted it ?!?
2263:
2264: &Failure($client, "failed\n", "$cmd:$tail");
2265: } else {
2266: &Reply($client, "ok\n", "$cmd:$tail");
2267: }
2268: } else {
2269: &Failure($client, "not_found\n", "$cmd:$tail");
2270: }
2271: } else {
2272: &Failure($client, "not_home\n", "$cmd:$tail");
2273: }
2274: }
2275: return 1;
2276: }
2277: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2278:
2279: #
2280: # make a directory in a user's home directory userfiles subdirectory.
2281: # Parameters:
2282: # cmd - the Lond request keyword that got us here.
2283: # tail - the part of the command past the keyword.
2284: # client- File descriptor connected with the client.
2285: #
2286: # Returns:
2287: # 1 - Continue processing.
2288: sub mkdir_user_file_handler {
2289: my ($cmd, $tail, $client) = @_;
2290:
2291: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2292: $dir=&unescape($dir);
2293: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2294: if ($ufile =~m|/\.\./|) {
2295: # any files paths with /../ in them refuse
2296: # to deal with
2297: &Failure($client, "refused\n", "$cmd:$tail");
2298: } else {
2299: my $udir = &propath($udom,$uname);
2300: if (-e $udir) {
2301: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2302: if (!&mkpath($newdir)) {
2303: &Failure($client, "failed\n", "$cmd:$tail");
2304: }
2305: &Reply($client, "ok\n", "$cmd:$tail");
2306: } else {
2307: &Failure($client, "not_home\n", "$cmd:$tail");
2308: }
2309: }
2310: return 1;
2311: }
2312: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2313:
2314: #
2315: # rename a file in a user's home directory userfiles subdirectory.
2316: # Parameters:
2317: # cmd - the Lond request keyword that got us here.
2318: # tail - the part of the command past the keyword.
2319: # client- File descriptor connected with the client.
2320: #
2321: # Returns:
2322: # 1 - Continue processing.
2323: sub rename_user_file_handler {
2324: my ($cmd, $tail, $client) = @_;
2325:
2326: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2327: $old=&unescape($old);
2328: $new=&unescape($new);
2329: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2330: # any files paths with /../ in them refuse to deal with
2331: &Failure($client, "refused\n", "$cmd:$tail");
2332: } else {
2333: my $udir = &propath($udom,$uname);
2334: if (-e $udir) {
2335: my $oldfile=$udir.'/userfiles/'.$old;
2336: my $newfile=$udir.'/userfiles/'.$new;
2337: if (-e $newfile) {
2338: &Failure($client, "exists\n", "$cmd:$tail");
2339: } elsif (! -e $oldfile) {
2340: &Failure($client, "not_found\n", "$cmd:$tail");
2341: } else {
2342: if (!rename($oldfile,$newfile)) {
2343: &Failure($client, "failed\n", "$cmd:$tail");
2344: } else {
2345: &Reply($client, "ok\n", "$cmd:$tail");
2346: }
2347: }
2348: } else {
2349: &Failure($client, "not_home\n", "$cmd:$tail");
2350: }
2351: }
2352: return 1;
2353: }
2354: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2355:
2356: #
2357: # Checks if the specified user has an active session on the server
2358: # return ok if so, not_found if not
2359: #
2360: # Parameters:
2361: # cmd - The request keyword that dispatched to tus.
2362: # tail - The tail of the request (colon separated parameters).
2363: # client - Filehandle open on the client.
2364: # Return:
2365: # 1.
2366: sub user_has_session_handler {
2367: my ($cmd, $tail, $client) = @_;
2368:
2369: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2370:
2371: &logthis("Looking for $udom $uname");
2372: opendir(DIR,$perlvar{'lonIDsDir'});
2373: my $filename;
2374: while ($filename=readdir(DIR)) {
2375: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2376: }
2377: if ($filename) {
2378: &Reply($client, "ok\n", "$cmd:$tail");
2379: } else {
2380: &Failure($client, "not_found\n", "$cmd:$tail");
2381: }
2382: return 1;
2383:
2384: }
2385: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2386:
2387: #
2388: # Authenticate access to a user file by checking that the token the user's
2389: # passed also exists in their session file
2390: #
2391: # Parameters:
2392: # cmd - The request keyword that dispatched to tus.
2393: # tail - The tail of the request (colon separated parameters).
2394: # client - Filehandle open on the client.
2395: # Return:
2396: # 1.
2397: sub token_auth_user_file_handler {
2398: my ($cmd, $tail, $client) = @_;
2399:
2400: my ($fname, $session) = split(/:/, $tail);
2401:
2402: chomp($session);
2403: my $reply="non_auth";
2404: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2405: if (open(ENVIN,"$file")) {
2406: flock(ENVIN,LOCK_SH);
2407: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2408: if (exists($disk_env{"userfile.$fname"})) {
2409: $reply="ok";
2410: } else {
2411: foreach my $envname (keys(%disk_env)) {
2412: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2413: $reply="ok";
2414: last;
2415: }
2416: }
2417: }
2418: untie(%disk_env);
2419: close(ENVIN);
2420: &Reply($client, \$reply, "$cmd:$tail");
2421: } else {
2422: &Failure($client, "invalid_token\n", "$cmd:$tail");
2423: }
2424: return 1;
2425:
2426: }
2427: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2428:
2429: #
2430: # Unsubscribe from a resource.
2431: #
2432: # Parameters:
2433: # $cmd - The command that got us here.
2434: # $tail - Tail of the command (remaining parameters).
2435: # $client - File descriptor connected to client.
2436: # Returns
2437: # 0 - Requested to exit, caller should shut down.
2438: # 1 - Continue processing.
2439: #
2440: sub unsubscribe_handler {
2441: my ($cmd, $tail, $client) = @_;
2442:
2443: my $userinput= "$cmd:$tail";
2444:
2445: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2446:
2447: &Debug("Unsubscribing $fname");
2448: if (-e $fname) {
2449: &Debug("Exists");
2450: &Reply($client, &unsub($fname,$clientip), $userinput);
2451: } else {
2452: &Failure($client, "not_found\n", $userinput);
2453: }
2454: return 1;
2455: }
2456: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2457:
2458: # Subscribe to a resource
2459: #
2460: # Parameters:
2461: # $cmd - The command that got us here.
2462: # $tail - Tail of the command (remaining parameters).
2463: # $client - File descriptor connected to client.
2464: # Returns
2465: # 0 - Requested to exit, caller should shut down.
2466: # 1 - Continue processing.
2467: #
2468: sub subscribe_handler {
2469: my ($cmd, $tail, $client)= @_;
2470:
2471: my $userinput = "$cmd:$tail";
2472:
2473: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2474:
2475: return 1;
2476: }
2477: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2478:
2479: #
2480: # Determine the latest version of a resource (it looks for the highest
2481: # past version and then returns that +1)
2482: #
2483: # Parameters:
2484: # $cmd - The command that got us here.
2485: # $tail - Tail of the command (remaining parameters).
2486: # (Should consist of an absolute path to a file)
2487: # $client - File descriptor connected to client.
2488: # Returns
2489: # 0 - Requested to exit, caller should shut down.
2490: # 1 - Continue processing.
2491: #
2492: sub current_version_handler {
2493: my ($cmd, $tail, $client) = @_;
2494:
2495: my $userinput= "$cmd:$tail";
2496:
2497: my $fname = $tail;
2498: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2499: return 1;
2500:
2501: }
2502: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2503:
2504: # Make an entry in a user's activity log.
2505: #
2506: # Parameters:
2507: # $cmd - The command that got us here.
2508: # $tail - Tail of the command (remaining parameters).
2509: # $client - File descriptor connected to client.
2510: # Returns
2511: # 0 - Requested to exit, caller should shut down.
2512: # 1 - Continue processing.
2513: #
2514: sub activity_log_handler {
2515: my ($cmd, $tail, $client) = @_;
2516:
2517:
2518: my $userinput= "$cmd:$tail";
2519:
2520: my ($udom,$uname,$what)=split(/:/,$tail);
2521: chomp($what);
2522: my $proname=&propath($udom,$uname);
2523: my $now=time;
2524: my $hfh;
2525: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2526: print $hfh "$now:$clientname:$what\n";
2527: &Reply( $client, "ok\n", $userinput);
2528: } else {
2529: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2530: ."while attempting log\n",
2531: $userinput);
2532: }
2533:
2534: return 1;
2535: }
2536: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2537:
2538: #
2539: # Put a namespace entry in a user profile hash.
2540: # My druthers would be for this to be an encrypted interaction too.
2541: # anything that might be an inadvertent covert channel about either
2542: # user authentication or user personal information....
2543: #
2544: # Parameters:
2545: # $cmd - The command that got us here.
2546: # $tail - Tail of the command (remaining parameters).
2547: # $client - File descriptor connected to client.
2548: # Returns
2549: # 0 - Requested to exit, caller should shut down.
2550: # 1 - Continue processing.
2551: #
2552: sub put_user_profile_entry {
2553: my ($cmd, $tail, $client) = @_;
2554:
2555: my $userinput = "$cmd:$tail";
2556:
2557: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2558: if ($namespace ne 'roles') {
2559: chomp($what);
2560: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2561: &GDBM_WRCREAT(),"P",$what);
2562: if($hashref) {
2563: my @pairs=split(/\&/,$what);
2564: foreach my $pair (@pairs) {
2565: my ($key,$value)=split(/=/,$pair);
2566: $hashref->{$key}=$value;
2567: }
2568: if (&untie_user_hash($hashref)) {
2569: &Reply( $client, "ok\n", $userinput);
2570: } else {
2571: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2572: "while attempting put\n",
2573: $userinput);
2574: }
2575: } else {
2576: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2577: "while attempting put\n", $userinput);
2578: }
2579: } else {
2580: &Failure( $client, "refused\n", $userinput);
2581: }
2582:
2583: return 1;
2584: }
2585: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2586:
2587: # Put a piece of new data in hash, returns error if entry already exists
2588: # Parameters:
2589: # $cmd - The command that got us here.
2590: # $tail - Tail of the command (remaining parameters).
2591: # $client - File descriptor connected to client.
2592: # Returns
2593: # 0 - Requested to exit, caller should shut down.
2594: # 1 - Continue processing.
2595: #
2596: sub newput_user_profile_entry {
2597: my ($cmd, $tail, $client) = @_;
2598:
2599: my $userinput = "$cmd:$tail";
2600:
2601: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2602: if ($namespace eq 'roles') {
2603: &Failure( $client, "refused\n", $userinput);
2604: return 1;
2605: }
2606:
2607: chomp($what);
2608:
2609: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2610: &GDBM_WRCREAT(),"N",$what);
2611: if(!$hashref) {
2612: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2613: "while attempting put\n", $userinput);
2614: return 1;
2615: }
2616:
2617: my @pairs=split(/\&/,$what);
2618: foreach my $pair (@pairs) {
2619: my ($key,$value)=split(/=/,$pair);
2620: if (exists($hashref->{$key})) {
2621: &Failure($client, "key_exists: ".$key."\n",$userinput);
2622: return 1;
2623: }
2624: }
2625:
2626: foreach my $pair (@pairs) {
2627: my ($key,$value)=split(/=/,$pair);
2628: $hashref->{$key}=$value;
2629: }
2630:
2631: if (&untie_user_hash($hashref)) {
2632: &Reply( $client, "ok\n", $userinput);
2633: } else {
2634: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2635: "while attempting put\n",
2636: $userinput);
2637: }
2638: return 1;
2639: }
2640: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2641:
2642: #
2643: # Increment a profile entry in the user history file.
2644: # The history contains keyword value pairs. In this case,
2645: # The value itself is a pair of numbers. The first, the current value
2646: # the second an increment that this function applies to the current
2647: # value.
2648: #
2649: # Parameters:
2650: # $cmd - The command that got us here.
2651: # $tail - Tail of the command (remaining parameters).
2652: # $client - File descriptor connected to client.
2653: # Returns
2654: # 0 - Requested to exit, caller should shut down.
2655: # 1 - Continue processing.
2656: #
2657: sub increment_user_value_handler {
2658: my ($cmd, $tail, $client) = @_;
2659:
2660: my $userinput = "$cmd:$tail";
2661:
2662: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2663: if ($namespace ne 'roles') {
2664: chomp($what);
2665: my $hashref = &tie_user_hash($udom, $uname,
2666: $namespace, &GDBM_WRCREAT(),
2667: "P",$what);
2668: if ($hashref) {
2669: my @pairs=split(/\&/,$what);
2670: foreach my $pair (@pairs) {
2671: my ($key,$value)=split(/=/,$pair);
2672: $value = &unescape($value);
2673: # We could check that we have a number...
2674: if (! defined($value) || $value eq '') {
2675: $value = 1;
2676: }
2677: $hashref->{$key}+=$value;
2678: if ($namespace eq 'nohist_resourcetracker') {
2679: if ($hashref->{$key} < 0) {
2680: $hashref->{$key} = 0;
2681: }
2682: }
2683: }
2684: if (&untie_user_hash($hashref)) {
2685: &Reply( $client, "ok\n", $userinput);
2686: } else {
2687: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2688: "while attempting inc\n", $userinput);
2689: }
2690: } else {
2691: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2692: "while attempting inc\n", $userinput);
2693: }
2694: } else {
2695: &Failure($client, "refused\n", $userinput);
2696: }
2697:
2698: return 1;
2699: }
2700: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2701:
2702: #
2703: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2704: # Each 'role' a user has implies a set of permissions. Adding a new role
2705: # for a person grants the permissions packaged with that role
2706: # to that user when the role is selected.
2707: #
2708: # Parameters:
2709: # $cmd - The command string (rolesput).
2710: # $tail - The remainder of the request line. For rolesput this
2711: # consists of a colon separated list that contains:
2712: # The domain and user that is granting the role (logged).
2713: # The domain and user that is getting the role.
2714: # The roles being granted as a set of & separated pairs.
2715: # each pair a key value pair.
2716: # $client - File descriptor connected to the client.
2717: # Returns:
2718: # 0 - If the daemon should exit
2719: # 1 - To continue processing.
2720: #
2721: #
2722: sub roles_put_handler {
2723: my ($cmd, $tail, $client) = @_;
2724:
2725: my $userinput = "$cmd:$tail";
2726:
2727: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2728:
2729:
2730: my $namespace='roles';
2731: chomp($what);
2732: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2733: &GDBM_WRCREAT(), "P",
2734: "$exedom:$exeuser:$what");
2735: #
2736: # Log the attempt to set a role. The {}'s here ensure that the file
2737: # handle is open for the minimal amount of time. Since the flush
2738: # is done on close this improves the chances the log will be an un-
2739: # corrupted ordered thing.
2740: if ($hashref) {
2741: my $pass_entry = &get_auth_type($udom, $uname);
2742: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2743: $auth_type = $auth_type.":";
2744: my @pairs=split(/\&/,$what);
2745: foreach my $pair (@pairs) {
2746: my ($key,$value)=split(/=/,$pair);
2747: &manage_permissions($key, $udom, $uname,
2748: $auth_type);
2749: $hashref->{$key}=$value;
2750: }
2751: if (&untie_user_hash($hashref)) {
2752: &Reply($client, "ok\n", $userinput);
2753: } else {
2754: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2755: "while attempting rolesput\n", $userinput);
2756: }
2757: } else {
2758: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2759: "while attempting rolesput\n", $userinput);
2760: }
2761: return 1;
2762: }
2763: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2764:
2765: #
2766: # Deletes (removes) a role for a user. This is equivalent to removing
2767: # a permissions package associated with the role from the user's profile.
2768: #
2769: # Parameters:
2770: # $cmd - The command (rolesdel)
2771: # $tail - The remainder of the request line. This consists
2772: # of:
2773: # The domain and user requesting the change (logged)
2774: # The domain and user being changed.
2775: # The roles being revoked. These are shipped to us
2776: # as a bunch of & separated role name keywords.
2777: # $client - The file handle open on the client.
2778: # Returns:
2779: # 1 - Continue processing
2780: # 0 - Exit.
2781: #
2782: sub roles_delete_handler {
2783: my ($cmd, $tail, $client) = @_;
2784:
2785: my $userinput = "$cmd:$tail";
2786:
2787: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2788: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2789: "what = ".$what);
2790: my $namespace='roles';
2791: chomp($what);
2792: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2793: &GDBM_WRCREAT(), "D",
2794: "$exedom:$exeuser:$what");
2795:
2796: if ($hashref) {
2797: my @rolekeys=split(/\&/,$what);
2798:
2799: foreach my $key (@rolekeys) {
2800: delete $hashref->{$key};
2801: }
2802: if (&untie_user_hash($hashref)) {
2803: &Reply($client, "ok\n", $userinput);
2804: } else {
2805: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2806: "while attempting rolesdel\n", $userinput);
2807: }
2808: } else {
2809: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2810: "while attempting rolesdel\n", $userinput);
2811: }
2812:
2813: return 1;
2814: }
2815: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2816:
2817: # Unencrypted get from a user's profile database. See
2818: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2819: # This function retrieves a keyed item from a specific named database in the
2820: # user's directory.
2821: #
2822: # Parameters:
2823: # $cmd - Command request keyword (get).
2824: # $tail - Tail of the command. This is a colon separated list
2825: # consisting of the domain and username that uniquely
2826: # identifies the profile,
2827: # The 'namespace' which selects the gdbm file to
2828: # do the lookup in,
2829: # & separated list of keys to lookup. Note that
2830: # the values are returned as an & separated list too.
2831: # $client - File descriptor open on the client.
2832: # Returns:
2833: # 1 - Continue processing.
2834: # 0 - Exit.
2835: #
2836: sub get_profile_entry {
2837: my ($cmd, $tail, $client) = @_;
2838:
2839: my $userinput= "$cmd:$tail";
2840:
2841: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2842: chomp($what);
2843:
2844:
2845: my $replystring = read_profile($udom, $uname, $namespace, $what);
2846: my ($first) = split(/:/,$replystring);
2847: if($first ne "error") {
2848: &Reply($client, \$replystring, $userinput);
2849: } else {
2850: &Failure($client, $replystring." while attempting get\n", $userinput);
2851: }
2852: return 1;
2853:
2854:
2855: }
2856: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2857:
2858: #
2859: # Process the encrypted get request. Note that the request is sent
2860: # in clear, but the reply is encrypted. This is a small covert channel:
2861: # information about the sensitive keys is given to the snooper. Just not
2862: # information about the values of the sensitive key. Hmm if I wanted to
2863: # know these I'd snoop for the egets. Get the profile item names from them
2864: # and then issue a get for them since there's no enforcement of the
2865: # requirement of an encrypted get for particular profile items. If I
2866: # were re-doing this, I'd force the request to be encrypted as well as the
2867: # reply. I'd also just enforce encrypted transactions for all gets since
2868: # that would prevent any covert channel snooping.
2869: #
2870: # Parameters:
2871: # $cmd - Command keyword of request (eget).
2872: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2873: # $client - File open on the client.
2874: # Returns:
2875: # 1 - Continue processing
2876: # 0 - server should exit.
2877: sub get_profile_entry_encrypted {
2878: my ($cmd, $tail, $client) = @_;
2879:
2880: my $userinput = "$cmd:$tail";
2881:
2882: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2883: chomp($what);
2884: my $qresult = read_profile($udom, $uname, $namespace, $what);
2885: my ($first) = split(/:/, $qresult);
2886: if($first ne "error") {
2887:
2888: if ($cipher) {
2889: my $cmdlength=length($qresult);
2890: $qresult.=" ";
2891: my $encqresult='';
2892: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2893: $encqresult.= unpack("H16",
2894: $cipher->encrypt(substr($qresult,
2895: $encidx,
2896: 8)));
2897: }
2898: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2899: } else {
2900: &Failure( $client, "error:no_key\n", $userinput);
2901: }
2902: } else {
2903: &Failure($client, "$qresult while attempting eget\n", $userinput);
2904:
2905: }
2906:
2907: return 1;
2908: }
2909: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
2910:
2911: #
2912: # Deletes a key in a user profile database.
2913: #
2914: # Parameters:
2915: # $cmd - Command keyword (del).
2916: # $tail - Command tail. IN this case a colon
2917: # separated list containing:
2918: # The domain and user that identifies uniquely
2919: # the identity of the user.
2920: # The profile namespace (name of the profile
2921: # database file).
2922: # & separated list of keywords to delete.
2923: # $client - File open on client socket.
2924: # Returns:
2925: # 1 - Continue processing
2926: # 0 - Exit server.
2927: #
2928: #
2929: sub delete_profile_entry {
2930: my ($cmd, $tail, $client) = @_;
2931:
2932: my $userinput = "cmd:$tail";
2933:
2934: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2935: chomp($what);
2936: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2937: &GDBM_WRCREAT(),
2938: "D",$what);
2939: if ($hashref) {
2940: my @keys=split(/\&/,$what);
2941: foreach my $key (@keys) {
2942: delete($hashref->{$key});
2943: }
2944: if (&untie_user_hash($hashref)) {
2945: &Reply($client, "ok\n", $userinput);
2946: } else {
2947: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2948: "while attempting del\n", $userinput);
2949: }
2950: } else {
2951: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2952: "while attempting del\n", $userinput);
2953: }
2954: return 1;
2955: }
2956: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2957:
2958: #
2959: # List the set of keys that are defined in a profile database file.
2960: # A successful reply from this will contain an & separated list of
2961: # the keys.
2962: # Parameters:
2963: # $cmd - Command request (keys).
2964: # $tail - Remainder of the request, a colon separated
2965: # list containing domain/user that identifies the
2966: # user being queried, and the database namespace
2967: # (database filename essentially).
2968: # $client - File open on the client.
2969: # Returns:
2970: # 1 - Continue processing.
2971: # 0 - Exit the server.
2972: #
2973: sub get_profile_keys {
2974: my ($cmd, $tail, $client) = @_;
2975:
2976: my $userinput = "$cmd:$tail";
2977:
2978: my ($udom,$uname,$namespace)=split(/:/,$tail);
2979: my $qresult='';
2980: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2981: &GDBM_READER());
2982: if ($hashref) {
2983: foreach my $key (keys %$hashref) {
2984: $qresult.="$key&";
2985: }
2986: if (&untie_user_hash($hashref)) {
2987: $qresult=~s/\&$//;
2988: &Reply($client, \$qresult, $userinput);
2989: } else {
2990: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2991: "while attempting keys\n", $userinput);
2992: }
2993: } else {
2994: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2995: "while attempting keys\n", $userinput);
2996: }
2997:
2998: return 1;
2999: }
3000: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3001:
3002: #
3003: # Dump the contents of a user profile database.
3004: # Note that this constitutes a very large covert channel too since
3005: # the dump will return sensitive information that is not encrypted.
3006: # The naive security assumption is that the session negotiation ensures
3007: # our client is trusted and I don't believe that's assured at present.
3008: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3009: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3010: #
3011: # Parameters:
3012: # $cmd - The command request keyword (currentdump).
3013: # $tail - Remainder of the request, consisting of a colon
3014: # separated list that has the domain/username and
3015: # the namespace to dump (database file).
3016: # $client - file open on the remote client.
3017: # Returns:
3018: # 1 - Continue processing.
3019: # 0 - Exit the server.
3020: #
3021: sub dump_profile_database {
3022: my ($cmd, $tail, $client) = @_;
3023:
3024: my $userinput = "$cmd:$tail";
3025:
3026: my ($udom,$uname,$namespace) = split(/:/,$tail);
3027: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3028: &GDBM_READER());
3029: if ($hashref) {
3030: # Structure of %data:
3031: # $data{$symb}->{$parameter}=$value;
3032: # $data{$symb}->{'v.'.$parameter}=$version;
3033: # since $parameter will be unescaped, we do not
3034: # have to worry about silly parameter names...
3035:
3036: my $qresult='';
3037: my %data = (); # A hash of anonymous hashes..
3038: while (my ($key,$value) = each(%$hashref)) {
3039: my ($v,$symb,$param) = split(/:/,$key);
3040: next if ($v eq 'version' || $symb eq 'keys');
3041: next if (exists($data{$symb}) &&
3042: exists($data{$symb}->{$param}) &&
3043: $data{$symb}->{'v.'.$param} > $v);
3044: $data{$symb}->{$param}=$value;
3045: $data{$symb}->{'v.'.$param}=$v;
3046: }
3047: if (&untie_user_hash($hashref)) {
3048: while (my ($symb,$param_hash) = each(%data)) {
3049: while(my ($param,$value) = each (%$param_hash)){
3050: next if ($param =~ /^v\./); # Ignore versions...
3051: #
3052: # Just dump the symb=value pairs separated by &
3053: #
3054: $qresult.=$symb.':'.$param.'='.$value.'&';
3055: }
3056: }
3057: chop($qresult);
3058: &Reply($client , \$qresult, $userinput);
3059: } else {
3060: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3061: "while attempting currentdump\n", $userinput);
3062: }
3063: } else {
3064: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3065: "while attempting currentdump\n", $userinput);
3066: }
3067:
3068: return 1;
3069: }
3070: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3071:
3072: #
3073: # Dump a profile database with an optional regular expression
3074: # to match against the keys. In this dump, no effort is made
3075: # to separate symb from version information. Presumably the
3076: # databases that are dumped by this command are of a different
3077: # structure. Need to look at this and improve the documentation of
3078: # both this and the currentdump handler.
3079: # Parameters:
3080: # $cmd - The command keyword.
3081: # $tail - All of the characters after the $cmd:
3082: # These are expected to be a colon
3083: # separated list containing:
3084: # domain/user - identifying the user.
3085: # namespace - identifying the database.
3086: # regexp - optional regular expression
3087: # that is matched against
3088: # database keywords to do
3089: # selective dumps.
3090: # $client - Channel open on the client.
3091: # Returns:
3092: # 1 - Continue processing.
3093: # Side effects:
3094: # response is written to $client.
3095: #
3096: sub dump_with_regexp {
3097: my ($cmd, $tail, $client) = @_;
3098:
3099:
3100: my $userinput = "$cmd:$tail";
3101:
3102: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
3103: if (defined($regexp)) {
3104: $regexp=&unescape($regexp);
3105: } else {
3106: $regexp='.';
3107: }
3108: my ($start,$end);
3109: if (defined($range)) {
3110: if ($range =~/^(\d+)\-(\d+)$/) {
3111: ($start,$end) = ($1,$2);
3112: } elsif ($range =~/^(\d+)$/) {
3113: ($start,$end) = (0,$1);
3114: } else {
3115: undef($range);
3116: }
3117: }
3118: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3119: &GDBM_READER());
3120: if ($hashref) {
3121: my $qresult='';
3122: my $count=0;
3123: while (my ($key,$value) = each(%$hashref)) {
3124: if ($regexp eq '.') {
3125: $count++;
3126: if (defined($range) && $count >= $end) { last; }
3127: if (defined($range) && $count < $start) { next; }
3128: $qresult.=$key.'='.$value.'&';
3129: } else {
3130: my $unescapeKey = &unescape($key);
3131: if (eval('$unescapeKey=~/$regexp/')) {
3132: $count++;
3133: if (defined($range) && $count >= $end) { last; }
3134: if (defined($range) && $count < $start) { next; }
3135: $qresult.="$key=$value&";
3136: }
3137: }
3138: }
3139: if (&untie_user_hash($hashref)) {
3140: chop($qresult);
3141: &Reply($client, \$qresult, $userinput);
3142: } else {
3143: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3144: "while attempting dump\n", $userinput);
3145: }
3146: } else {
3147: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3148: "while attempting dump\n", $userinput);
3149: }
3150:
3151: return 1;
3152: }
3153: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3154:
3155: # Store a set of key=value pairs associated with a versioned name.
3156: #
3157: # Parameters:
3158: # $cmd - Request command keyword.
3159: # $tail - Tail of the request. This is a colon
3160: # separated list containing:
3161: # domain/user - User and authentication domain.
3162: # namespace - Name of the database being modified
3163: # rid - Resource keyword to modify.
3164: # what - new value associated with rid.
3165: #
3166: # $client - Socket open on the client.
3167: #
3168: #
3169: # Returns:
3170: # 1 (keep on processing).
3171: # Side-Effects:
3172: # Writes to the client
3173: sub store_handler {
3174: my ($cmd, $tail, $client) = @_;
3175:
3176: my $userinput = "$cmd:$tail";
3177:
3178: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3179: if ($namespace ne 'roles') {
3180:
3181: chomp($what);
3182: my @pairs=split(/\&/,$what);
3183: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3184: &GDBM_WRCREAT(), "S",
3185: "$rid:$what");
3186: if ($hashref) {
3187: my $now = time;
3188: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3189: my $key;
3190: $hashref->{"version:$rid"}++;
3191: my $version=$hashref->{"version:$rid"};
3192: my $allkeys='';
3193: foreach my $pair (@pairs) {
3194: my ($key,$value)=split(/=/,$pair);
3195: $allkeys.=$key.':';
3196: $hashref->{"$version:$rid:$key"}=$value;
3197: }
3198: $hashref->{"$version:$rid:timestamp"}=$now;
3199: $allkeys.='timestamp';
3200: $hashref->{"$version:keys:$rid"}=$allkeys;
3201: if (&untie_user_hash($hashref)) {
3202: &Reply($client, "ok\n", $userinput);
3203: } else {
3204: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3205: "while attempting store\n", $userinput);
3206: }
3207: } else {
3208: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3209: "while attempting store\n", $userinput);
3210: }
3211: } else {
3212: &Failure($client, "refused\n", $userinput);
3213: }
3214:
3215: return 1;
3216: }
3217: ®ister_handler("store", \&store_handler, 0, 1, 0);
3218:
3219: # Modify a set of key=value pairs associated with a versioned name.
3220: #
3221: # Parameters:
3222: # $cmd - Request command keyword.
3223: # $tail - Tail of the request. This is a colon
3224: # separated list containing:
3225: # domain/user - User and authentication domain.
3226: # namespace - Name of the database being modified
3227: # rid - Resource keyword to modify.
3228: # v - Version item to modify
3229: # what - new value associated with rid.
3230: #
3231: # $client - Socket open on the client.
3232: #
3233: #
3234: # Returns:
3235: # 1 (keep on processing).
3236: # Side-Effects:
3237: # Writes to the client
3238: sub putstore_handler {
3239: my ($cmd, $tail, $client) = @_;
3240:
3241: my $userinput = "$cmd:$tail";
3242:
3243: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3244: if ($namespace ne 'roles') {
3245:
3246: chomp($what);
3247: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3248: &GDBM_WRCREAT(), "M",
3249: "$rid:$v:$what");
3250: if ($hashref) {
3251: my $now = time;
3252: my %data = &hash_extract($what);
3253: my @allkeys;
3254: while (my($key,$value) = each(%data)) {
3255: push(@allkeys,$key);
3256: $hashref->{"$v:$rid:$key"} = $value;
3257: }
3258: my $allkeys = join(':',@allkeys);
3259: $hashref->{"$v:keys:$rid"}=$allkeys;
3260:
3261: if (&untie_user_hash($hashref)) {
3262: &Reply($client, "ok\n", $userinput);
3263: } else {
3264: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3265: "while attempting store\n", $userinput);
3266: }
3267: } else {
3268: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3269: "while attempting store\n", $userinput);
3270: }
3271: } else {
3272: &Failure($client, "refused\n", $userinput);
3273: }
3274:
3275: return 1;
3276: }
3277: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3278:
3279: sub hash_extract {
3280: my ($str)=@_;
3281: my %hash;
3282: foreach my $pair (split(/\&/,$str)) {
3283: my ($key,$value)=split(/=/,$pair);
3284: $hash{$key}=$value;
3285: }
3286: return (%hash);
3287: }
3288: sub hash_to_str {
3289: my ($hash_ref)=@_;
3290: my $str;
3291: foreach my $key (keys(%$hash_ref)) {
3292: $str.=$key.'='.$hash_ref->{$key}.'&';
3293: }
3294: $str=~s/\&$//;
3295: return $str;
3296: }
3297:
3298: #
3299: # Dump out all versions of a resource that has key=value pairs associated
3300: # with it for each version. These resources are built up via the store
3301: # command.
3302: #
3303: # Parameters:
3304: # $cmd - Command keyword.
3305: # $tail - Remainder of the request which consists of:
3306: # domain/user - User and auth. domain.
3307: # namespace - name of resource database.
3308: # rid - Resource id.
3309: # $client - socket open on the client.
3310: #
3311: # Returns:
3312: # 1 indicating the caller should not yet exit.
3313: # Side-effects:
3314: # Writes a reply to the client.
3315: # The reply is a string of the following shape:
3316: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3317: # Where the 1 above represents version 1.
3318: # this continues for all pairs of keys in all versions.
3319: #
3320: #
3321: #
3322: #
3323: sub restore_handler {
3324: my ($cmd, $tail, $client) = @_;
3325:
3326: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3327: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3328: $namespace=~s/\//\_/g;
3329: $namespace = &LONCAPA::clean_username($namespace);
3330:
3331: chomp($rid);
3332: my $qresult='';
3333: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3334: if ($hashref) {
3335: my $version=$hashref->{"version:$rid"};
3336: $qresult.="version=$version&";
3337: my $scope;
3338: for ($scope=1;$scope<=$version;$scope++) {
3339: my $vkeys=$hashref->{"$scope:keys:$rid"};
3340: my @keys=split(/:/,$vkeys);
3341: my $key;
3342: $qresult.="$scope:keys=$vkeys&";
3343: foreach $key (@keys) {
3344: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3345: }
3346: }
3347: if (&untie_user_hash($hashref)) {
3348: $qresult=~s/\&$//;
3349: &Reply( $client, \$qresult, $userinput);
3350: } else {
3351: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3352: "while attempting restore\n", $userinput);
3353: }
3354: } else {
3355: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3356: "while attempting restore\n", $userinput);
3357: }
3358:
3359: return 1;
3360:
3361:
3362: }
3363: ®ister_handler("restore", \&restore_handler, 0,1,0);
3364:
3365: #
3366: # Add a chat message to a synchronous discussion board.
3367: #
3368: # Parameters:
3369: # $cmd - Request keyword.
3370: # $tail - Tail of the command. A colon separated list
3371: # containing:
3372: # cdom - Domain on which the chat board lives
3373: # cnum - Course containing the chat board.
3374: # newpost - Body of the posting.
3375: # group - Optional group, if chat board is only
3376: # accessible in a group within the course
3377: # $client - Socket open on the client.
3378: # Returns:
3379: # 1 - Indicating caller should keep on processing.
3380: #
3381: # Side-effects:
3382: # writes a reply to the client.
3383: #
3384: #
3385: sub send_chat_handler {
3386: my ($cmd, $tail, $client) = @_;
3387:
3388:
3389: my $userinput = "$cmd:$tail";
3390:
3391: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3392: &chat_add($cdom,$cnum,$newpost,$group);
3393: &Reply($client, "ok\n", $userinput);
3394:
3395: return 1;
3396: }
3397: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3398:
3399: #
3400: # Retrieve the set of chat messages from a discussion board.
3401: #
3402: # Parameters:
3403: # $cmd - Command keyword that initiated the request.
3404: # $tail - Remainder of the request after the command
3405: # keyword. In this case a colon separated list of
3406: # chat domain - Which discussion board.
3407: # chat id - Discussion thread(?)
3408: # domain/user - Authentication domain and username
3409: # of the requesting person.
3410: # group - Optional course group containing
3411: # the board.
3412: # $client - Socket open on the client program.
3413: # Returns:
3414: # 1 - continue processing
3415: # Side effects:
3416: # Response is written to the client.
3417: #
3418: sub retrieve_chat_handler {
3419: my ($cmd, $tail, $client) = @_;
3420:
3421:
3422: my $userinput = "$cmd:$tail";
3423:
3424: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3425: my $reply='';
3426: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3427: $reply.=&escape($_).':';
3428: }
3429: $reply=~s/\:$//;
3430: &Reply($client, \$reply, $userinput);
3431:
3432:
3433: return 1;
3434: }
3435: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3436:
3437: #
3438: # Initiate a query of an sql database. SQL query repsonses get put in
3439: # a file for later retrieval. This prevents sql query results from
3440: # bottlenecking the system. Note that with loncnew, perhaps this is
3441: # less of an issue since multiple outstanding requests can be concurrently
3442: # serviced.
3443: #
3444: # Parameters:
3445: # $cmd - COmmand keyword that initiated the request.
3446: # $tail - Remainder of the command after the keyword.
3447: # For this function, this consists of a query and
3448: # 3 arguments that are self-documentingly labelled
3449: # in the original arg1, arg2, arg3.
3450: # $client - Socket open on the client.
3451: # Return:
3452: # 1 - Indicating processing should continue.
3453: # Side-effects:
3454: # a reply is written to $client.
3455: #
3456: sub send_query_handler {
3457: my ($cmd, $tail, $client) = @_;
3458:
3459:
3460: my $userinput = "$cmd:$tail";
3461:
3462: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3463: $query=~s/\n*$//g;
3464: &Reply($client, "". &sql_reply("$clientname\&$query".
3465: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3466: $userinput);
3467:
3468: return 1;
3469: }
3470: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3471:
3472: #
3473: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3474: # The query is submitted via a "querysend" transaction.
3475: # There it is passed on to the lonsql daemon, queued and issued to
3476: # mysql.
3477: # This transaction is invoked when the sql transaction is complete
3478: # it stores the query results in flie and indicates query completion.
3479: # presumably local software then fetches this response... I'm guessing
3480: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3481: # lonsql on completion of the query interacts with the lond of our
3482: # client to do a query reply storing two files:
3483: # - id - The results of the query.
3484: # - id.end - Indicating the transaction completed.
3485: # NOTE: id is a unique id assigned to the query and querysend time.
3486: # Parameters:
3487: # $cmd - Command keyword that initiated this request.
3488: # $tail - Remainder of the tail. In this case that's a colon
3489: # separated list containing the query Id and the
3490: # results of the query.
3491: # $client - Socket open on the client.
3492: # Return:
3493: # 1 - Indicating that we should continue processing.
3494: # Side effects:
3495: # ok written to the client.
3496: #
3497: sub reply_query_handler {
3498: my ($cmd, $tail, $client) = @_;
3499:
3500:
3501: my $userinput = "$cmd:$tail";
3502:
3503: my ($id,$reply)=split(/:/,$tail);
3504: my $store;
3505: my $execdir=$perlvar{'lonDaemons'};
3506: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3507: $reply=~s/\&/\n/g;
3508: print $store $reply;
3509: close $store;
3510: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3511: print $store2 "done\n";
3512: close $store2;
3513: &Reply($client, "ok\n", $userinput);
3514: } else {
3515: &Failure($client, "error: ".($!+0)
3516: ." IO::File->new Failed ".
3517: "while attempting queryreply\n", $userinput);
3518: }
3519:
3520:
3521: return 1;
3522: }
3523: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3524:
3525: #
3526: # Process the courseidput request. Not quite sure what this means
3527: # at the system level sense. It appears a gdbm file in the
3528: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3529: # a set of entries made in that database.
3530: #
3531: # Parameters:
3532: # $cmd - The command keyword that initiated this request.
3533: # $tail - Tail of the command. In this case consists of a colon
3534: # separated list contaning the domain to apply this to and
3535: # an ampersand separated list of keyword=value pairs.
3536: # Each value is a colon separated list that includes:
3537: # description, institutional code and course owner.
3538: # For backward compatibility with versions included
3539: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3540: # code and/or course owner are preserved from the existing
3541: # record when writing a new record in response to 1.1 or
3542: # 1.2 implementations of lonnet::flushcourselogs().
3543: #
3544: # $client - Socket open on the client.
3545: # Returns:
3546: # 1 - indicating that processing should continue
3547: #
3548: # Side effects:
3549: # reply is written to the client.
3550: #
3551: sub put_course_id_handler {
3552: my ($cmd, $tail, $client) = @_;
3553:
3554:
3555: my $userinput = "$cmd:$tail";
3556:
3557: my ($udom, $what) = split(/:/, $tail,2);
3558: chomp($what);
3559: my $now=time;
3560: my @pairs=split(/\&/,$what);
3561:
3562: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3563: if ($hashref) {
3564: foreach my $pair (@pairs) {
3565: my ($key,$courseinfo) = split(/=/,$pair,2);
3566: $courseinfo =~ s/=/:/g;
3567: if (defined($hashref->{$key})) {
3568: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3569: if (ref($value) eq 'HASH') {
3570: my @items = ('description','inst_code','owner','type');
3571: my @new_items = split(/:/,$courseinfo,-1);
3572: my %storehash;
3573: for (my $i=0; $i<@new_items; $i++) {
3574: $storehash{$items[$i]} = &unescape($new_items[$i]);
3575: }
3576: $hashref->{$key} =
3577: &Apache::lonnet::freeze_escape(\%storehash);
3578: my $unesc_key = &unescape($key);
3579: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3580: next;
3581: }
3582: }
3583: my @current_items = split(/:/,$hashref->{$key},-1);
3584: shift(@current_items); # remove description
3585: pop(@current_items); # remove last access
3586: my $numcurrent = scalar(@current_items);
3587: if ($numcurrent > 3) {
3588: $numcurrent = 3;
3589: }
3590: my @new_items = split(/:/,$courseinfo,-1);
3591: my $numnew = scalar(@new_items);
3592: if ($numcurrent > 0) {
3593: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3594: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3595: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3596: }
3597: }
3598: }
3599: $hashref->{$key}=$courseinfo.':'.$now;
3600: }
3601: if (&untie_domain_hash($hashref)) {
3602: &Reply( $client, "ok\n", $userinput);
3603: } else {
3604: &Failure($client, "error: ".($!+0)
3605: ." untie(GDBM) Failed ".
3606: "while attempting courseidput\n", $userinput);
3607: }
3608: } else {
3609: &Failure($client, "error: ".($!+0)
3610: ." tie(GDBM) Failed ".
3611: "while attempting courseidput\n", $userinput);
3612: }
3613:
3614: return 1;
3615: }
3616: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3617:
3618: sub put_course_id_hash_handler {
3619: my ($cmd, $tail, $client) = @_;
3620: my $userinput = "$cmd:$tail";
3621: my ($udom,$mode,$what) = split(/:/, $tail,3);
3622: chomp($what);
3623: my $now=time;
3624: my @pairs=split(/\&/,$what);
3625: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3626: if ($hashref) {
3627: foreach my $pair (@pairs) {
3628: my ($key,$value)=split(/=/,$pair);
3629: my $unesc_key = &unescape($key);
3630: if ($mode ne 'timeonly') {
3631: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3632: my $curritems = &Apache::lonnet::thaw_unescape($key);
3633: if (ref($curritems) ne 'HASH') {
3634: my @current_items = split(/:/,$hashref->{$key},-1);
3635: my $lasttime = pop(@current_items);
3636: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3637: } else {
3638: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3639: }
3640: }
3641: $hashref->{$key} = $value;
3642: }
3643: if ($mode ne 'notime') {
3644: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3645: }
3646: }
3647: if (&untie_domain_hash($hashref)) {
3648: &Reply($client, "ok\n", $userinput);
3649: } else {
3650: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3651: "while attempting courseidputhash\n", $userinput);
3652: }
3653: } else {
3654: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3655: "while attempting courseidputhash\n", $userinput);
3656: }
3657: return 1;
3658: }
3659: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3660:
3661: # Retrieves the value of a course id resource keyword pattern
3662: # defined since a starting date. Both the starting date and the
3663: # keyword pattern are optional. If the starting date is not supplied it
3664: # is treated as the beginning of time. If the pattern is not found,
3665: # it is treatred as "." matching everything.
3666: #
3667: # Parameters:
3668: # $cmd - Command keyword that resulted in us being dispatched.
3669: # $tail - The remainder of the command that, in this case, consists
3670: # of a colon separated list of:
3671: # domain - The domain in which the course database is
3672: # defined.
3673: # since - Optional parameter describing the minimum
3674: # time of definition(?) of the resources that
3675: # will match the dump.
3676: # description - regular expression that is used to filter
3677: # the dump. Only keywords matching this regexp
3678: # will be used.
3679: # institutional code - optional supplied code to filter
3680: # the dump. Only courses with an institutional code
3681: # that match the supplied code will be returned.
3682: # owner - optional supplied username and domain of owner to
3683: # filter the dump. Only courses for which the course
3684: # owner matches the supplied username and/or domain
3685: # will be returned. Pre-2.2.0 legacy entries from
3686: # nohist_courseiddump will only contain usernames.
3687: # type - optional parameter for selection
3688: # regexp_ok - if 1 or -1 allow the supplied institutional code
3689: # filter to behave as a regular expression:
3690: # 1 will not exclude the course if the instcode matches the RE
3691: # -1 will exclude the course if the instcode matches the RE
3692: # rtn_as_hash - whether to return the information available for
3693: # each matched item as a frozen hash of all
3694: # key, value pairs in the item's hash, or as a
3695: # colon-separated list of (in order) description,
3696: # institutional code, and course owner.
3697: # selfenrollonly - filter by courses allowing self-enrollment
3698: # now or in the future (selfenrollonly = 1).
3699: # catfilter - filter by course category, assigned to a course
3700: # using manually defined categories (i.e., not
3701: # self-cataloging based on on institutional code).
3702: # showhidden - include course in results even if course
3703: # was set to be excluded from course catalog (DC only).
3704: # caller - if set to 'coursecatalog', courses set to be hidden
3705: # from course catalog will be excluded from results (unless
3706: # overridden by "showhidden".
3707: # cloner - escaped username:domain of course cloner (if picking course to
3708: # clone).
3709: # cc_clone_list - escaped comma separated list of courses for which
3710: # course cloner has active CC role (and so can clone
3711: # automatically).
3712: # cloneonly - filter by courses for which cloner has rights to clone.
3713: # createdbefore - include courses for which creation date preceeded this date.
3714: # createdafter - include courses for which creation date followed this date.
3715: # creationcontext - include courses created in specified context
3716: #
3717: # $client - The socket open on the client.
3718: # Returns:
3719: # 1 - Continue processing.
3720: # Side Effects:
3721: # a reply is written to $client.
3722: sub dump_course_id_handler {
3723: my ($cmd, $tail, $client) = @_;
3724: my $userinput = "$cmd:$tail";
3725:
3726: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3727: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
3728: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
3729: $creationcontext) =split(/:/,$tail);
3730: my $now = time;
3731: my ($cloneruname,$clonerudom,%cc_clone);
3732: if (defined($description)) {
3733: $description=&unescape($description);
3734: } else {
3735: $description='.';
3736: }
3737: if (defined($instcodefilter)) {
3738: $instcodefilter=&unescape($instcodefilter);
3739: } else {
3740: $instcodefilter='.';
3741: }
3742: my ($ownerunamefilter,$ownerdomfilter);
3743: if (defined($ownerfilter)) {
3744: $ownerfilter=&unescape($ownerfilter);
3745: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3746: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3747: $ownerunamefilter = $1;
3748: $ownerdomfilter = $2;
3749: } else {
3750: $ownerunamefilter = $ownerfilter;
3751: $ownerdomfilter = '';
3752: }
3753: }
3754: } else {
3755: $ownerfilter='.';
3756: }
3757:
3758: if (defined($coursefilter)) {
3759: $coursefilter=&unescape($coursefilter);
3760: } else {
3761: $coursefilter='.';
3762: }
3763: if (defined($typefilter)) {
3764: $typefilter=&unescape($typefilter);
3765: } else {
3766: $typefilter='.';
3767: }
3768: if (defined($regexp_ok)) {
3769: $regexp_ok=&unescape($regexp_ok);
3770: }
3771: if (defined($catfilter)) {
3772: $catfilter=&unescape($catfilter);
3773: }
3774: if (defined($cloner)) {
3775: $cloner = &unescape($cloner);
3776: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
3777: }
3778: if (defined($cc_clone_list)) {
3779: $cc_clone_list = &unescape($cc_clone_list);
3780: my @cc_cloners = split('&',$cc_clone_list);
3781: foreach my $cid (@cc_cloners) {
3782: my ($clonedom,$clonenum) = split(':',$cid);
3783: next if ($clonedom ne $udom);
3784: $cc_clone{$clonedom.'_'.$clonenum} = 1;
3785: }
3786: }
3787: if (defined($createdbefore)) {
3788: $createdbefore = &unescape($createdbefore);
3789: } else {
3790: $createdbefore = 0;
3791: }
3792: if (defined($createdafter)) {
3793: $createdafter = &unescape($createdafter);
3794: } else {
3795: $createdafter = 0;
3796: }
3797: if (defined($creationcontext)) {
3798: $creationcontext = &unescape($creationcontext);
3799: } else {
3800: $creationcontext = '.';
3801: }
3802:
3803: my $unpack = 1;
3804: if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&
3805: $typefilter eq '.') {
3806: $unpack = 0;
3807: }
3808: if (!defined($since)) { $since=0; }
3809: my $qresult='';
3810: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3811: if ($hashref) {
3812: while (my ($key,$value) = each(%$hashref)) {
3813: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
3814: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
3815: $context);
3816: $unesc_key = &unescape($key);
3817: if ($unesc_key =~ /^lasttime:/) {
3818: next;
3819: } else {
3820: $lasttime_key = &escape('lasttime:'.$unesc_key);
3821: }
3822: if ($hashref->{$lasttime_key} ne '') {
3823: $lasttime = $hashref->{$lasttime_key};
3824: next if ($lasttime<$since);
3825: }
3826: my ($canclone,$valchange);
3827: my $items = &Apache::lonnet::thaw_unescape($value);
3828: if (ref($items) eq 'HASH') {
3829: if ($hashref->{$lasttime_key} eq '') {
3830: next if ($since > 1);
3831: }
3832: $is_hash = 1;
3833: if (defined($clonerudom)) {
3834: if ($items->{'cloners'}) {
3835: my @cloneable = split(',',$items->{'cloners'});
3836: if (@cloneable) {
3837: if (grep(/^\*$/,@cloneable)) {
3838: $canclone = 1;
3839: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
3840: $canclone = 1;
3841: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
3842: $canclone = 1;
3843: }
3844: }
3845: unless ($canclone) {
3846: if ($cloneruname ne '' && $clonerudom ne '') {
3847: if ($cc_clone{$unesc_key}) {
3848: $canclone = 1;
3849: $items->{'cloners'} .= ','.$cloneruname.':'.
3850: $clonerudom;
3851: $valchange = 1;
3852: }
3853: }
3854: }
3855: } elsif (defined($cloneruname)) {
3856: if ($cc_clone{$unesc_key}) {
3857: $canclone = 1;
3858: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3859: $valchange = 1;
3860: }
3861: }
3862: }
3863: if ($unpack || !$rtn_as_hash) {
3864: $unesc_val{'descr'} = $items->{'description'};
3865: $unesc_val{'inst_code'} = $items->{'inst_code'};
3866: $unesc_val{'owner'} = $items->{'owner'};
3867: $unesc_val{'type'} = $items->{'type'};
3868: $unesc_val{'cloners'} = $items->{'cloners'};
3869: $unesc_val{'created'} = $items->{'created'};
3870: $unesc_val{'context'} = $items->{'context'};
3871: }
3872: $selfenroll_types = $items->{'selfenroll_types'};
3873: $selfenroll_end = $items->{'selfenroll_end_date'};
3874: $created = $items->{'created'};
3875: $context = $items->{'context'};
3876: if ($selfenrollonly) {
3877: next if (!$selfenroll_types);
3878: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
3879: next;
3880: }
3881: }
3882: if ($creationcontext ne '.') {
3883: next if (($context ne '') && ($context ne $creationcontext));
3884: }
3885: if ($createdbefore > 0) {
3886: next if (($created eq '') || ($created > $createdbefore));
3887: }
3888: if ($createdafter > 0) {
3889: next if (($created eq '') || ($created <= $createdafter));
3890: }
3891: if ($catfilter ne '') {
3892: next if ($items->{'categories'} eq '');
3893: my @categories = split('&',$items->{'categories'});
3894: next if (@categories == 0);
3895: my @subcats = split('&',$catfilter);
3896: my $matchcat = 0;
3897: foreach my $cat (@categories) {
3898: if (grep(/^\Q$cat\E$/,@subcats)) {
3899: $matchcat = 1;
3900: last;
3901: }
3902: }
3903: next if (!$matchcat);
3904: }
3905: if ($caller eq 'coursecatalog') {
3906: if ($items->{'hidefromcat'} eq 'yes') {
3907: next if !$showhidden;
3908: }
3909: }
3910: } else {
3911: next if ($catfilter ne '');
3912: next if ($selfenrollonly);
3913: next if ($createdbefore || $createdafter);
3914: next if ($creationcontext ne '.');
3915: if ((defined($clonerudom)) && (defined($cloneruname))) {
3916: if ($cc_clone{$unesc_key}) {
3917: $canclone = 1;
3918: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
3919: }
3920: }
3921: $is_hash = 0;
3922: my @courseitems = split(/:/,$value);
3923: $lasttime = pop(@courseitems);
3924: if ($hashref->{$lasttime_key} eq '') {
3925: next if ($lasttime<$since);
3926: }
3927: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
3928: }
3929: if ($cloneonly) {
3930: next unless ($canclone);
3931: }
3932: my $match = 1;
3933: if ($description ne '.') {
3934: if (!$is_hash) {
3935: $unesc_val{'descr'} = &unescape($val{'descr'});
3936: }
3937: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
3938: $match = 0;
3939: }
3940: }
3941: if ($instcodefilter ne '.') {
3942: if (!$is_hash) {
3943: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
3944: }
3945: if ($regexp_ok == 1) {
3946: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
3947: $match = 0;
3948: }
3949: } elsif ($regexp_ok == -1) {
3950: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
3951: $match = 0;
3952: }
3953: } else {
3954: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
3955: $match = 0;
3956: }
3957: }
3958: }
3959: if ($ownerfilter ne '.') {
3960: if (!$is_hash) {
3961: $unesc_val{'owner'} = &unescape($val{'owner'});
3962: }
3963: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
3964: if ($unesc_val{'owner'} =~ /:/) {
3965: if (eval{$unesc_val{'owner'} !~
3966: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
3967: $match = 0;
3968: }
3969: } else {
3970: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
3971: $match = 0;
3972: }
3973: }
3974: } elsif ($ownerunamefilter ne '') {
3975: if ($unesc_val{'owner'} =~ /:/) {
3976: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
3977: $match = 0;
3978: }
3979: } else {
3980: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
3981: $match = 0;
3982: }
3983: }
3984: } elsif ($ownerdomfilter ne '') {
3985: if ($unesc_val{'owner'} =~ /:/) {
3986: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
3987: $match = 0;
3988: }
3989: } else {
3990: if ($ownerdomfilter ne $udom) {
3991: $match = 0;
3992: }
3993: }
3994: }
3995: }
3996: if ($coursefilter ne '.') {
3997: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
3998: $match = 0;
3999: }
4000: }
4001: if ($typefilter ne '.') {
4002: if (!$is_hash) {
4003: $unesc_val{'type'} = &unescape($val{'type'});
4004: }
4005: if ($unesc_val{'type'} eq '') {
4006: if ($typefilter ne 'Course') {
4007: $match = 0;
4008: }
4009: } else {
4010: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4011: $match = 0;
4012: }
4013: }
4014: }
4015: if ($match == 1) {
4016: if ($rtn_as_hash) {
4017: if ($is_hash) {
4018: if ($valchange) {
4019: my $newvalue = &Apache::lonnet::freeze_escape($items);
4020: $qresult.=$key.'='.$newvalue.'&';
4021: } else {
4022: $qresult.=$key.'='.$value.'&';
4023: }
4024: } else {
4025: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4026: 'inst_code' => &unescape($val{'inst_code'}),
4027: 'owner' => &unescape($val{'owner'}),
4028: 'type' => &unescape($val{'type'}),
4029: 'cloners' => &unescape($val{'cloners'}),
4030: );
4031: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4032: $qresult.=$key.'='.$items.'&';
4033: }
4034: } else {
4035: if ($is_hash) {
4036: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4037: &escape($unesc_val{'inst_code'}).':'.
4038: &escape($unesc_val{'owner'}).'&';
4039: } else {
4040: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4041: ':'.$val{'owner'}.'&';
4042: }
4043: }
4044: }
4045: }
4046: if (&untie_domain_hash($hashref)) {
4047: chop($qresult);
4048: &Reply($client, \$qresult, $userinput);
4049: } else {
4050: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4051: "while attempting courseiddump\n", $userinput);
4052: }
4053: } else {
4054: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4055: "while attempting courseiddump\n", $userinput);
4056: }
4057: return 1;
4058: }
4059: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4060:
4061: #
4062: # Puts an unencrypted entry in a namespace db file at the domain level
4063: #
4064: # Parameters:
4065: # $cmd - The command that got us here.
4066: # $tail - Tail of the command (remaining parameters).
4067: # $client - File descriptor connected to client.
4068: # Returns
4069: # 0 - Requested to exit, caller should shut down.
4070: # 1 - Continue processing.
4071: # Side effects:
4072: # reply is written to $client.
4073: #
4074: sub put_domain_handler {
4075: my ($cmd,$tail,$client) = @_;
4076:
4077: my $userinput = "$cmd:$tail";
4078:
4079: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4080: chomp($what);
4081: my @pairs=split(/\&/,$what);
4082: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4083: "P", $what);
4084: if ($hashref) {
4085: foreach my $pair (@pairs) {
4086: my ($key,$value)=split(/=/,$pair);
4087: $hashref->{$key}=$value;
4088: }
4089: if (&untie_domain_hash($hashref)) {
4090: &Reply($client, "ok\n", $userinput);
4091: } else {
4092: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4093: "while attempting putdom\n", $userinput);
4094: }
4095: } else {
4096: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4097: "while attempting putdom\n", $userinput);
4098: }
4099:
4100: return 1;
4101: }
4102: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4103:
4104: # Unencrypted get from the namespace database file at the domain level.
4105: # This function retrieves a keyed item from a specific named database in the
4106: # domain directory.
4107: #
4108: # Parameters:
4109: # $cmd - Command request keyword (get).
4110: # $tail - Tail of the command. This is a colon separated list
4111: # consisting of the domain and the 'namespace'
4112: # which selects the gdbm file to do the lookup in,
4113: # & separated list of keys to lookup. Note that
4114: # the values are returned as an & separated list too.
4115: # $client - File descriptor open on the client.
4116: # Returns:
4117: # 1 - Continue processing.
4118: # 0 - Exit.
4119: # Side effects:
4120: # reply is written to $client.
4121: #
4122:
4123: sub get_domain_handler {
4124: my ($cmd, $tail, $client) = @_;
4125:
4126: my $userinput = "$client:$tail";
4127:
4128: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4129: chomp($what);
4130: my @queries=split(/\&/,$what);
4131: my $qresult='';
4132: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4133: if ($hashref) {
4134: for (my $i=0;$i<=$#queries;$i++) {
4135: $qresult.="$hashref->{$queries[$i]}&";
4136: }
4137: if (&untie_domain_hash($hashref)) {
4138: $qresult=~s/\&$//;
4139: &Reply($client, \$qresult, $userinput);
4140: } else {
4141: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4142: "while attempting getdom\n",$userinput);
4143: }
4144: } else {
4145: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4146: "while attempting getdom\n",$userinput);
4147: }
4148:
4149: return 1;
4150: }
4151: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4152:
4153: #
4154: # Puts an id to a domains id database.
4155: #
4156: # Parameters:
4157: # $cmd - The command that triggered us.
4158: # $tail - Remainder of the request other than the command. This is a
4159: # colon separated list containing:
4160: # $domain - The domain for which we are writing the id.
4161: # $pairs - The id info to write... this is and & separated list
4162: # of keyword=value.
4163: # $client - Socket open on the client.
4164: # Returns:
4165: # 1 - Continue processing.
4166: # Side effects:
4167: # reply is written to $client.
4168: #
4169: sub put_id_handler {
4170: my ($cmd,$tail,$client) = @_;
4171:
4172:
4173: my $userinput = "$cmd:$tail";
4174:
4175: my ($udom,$what)=split(/:/,$tail);
4176: chomp($what);
4177: my @pairs=split(/\&/,$what);
4178: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4179: "P", $what);
4180: if ($hashref) {
4181: foreach my $pair (@pairs) {
4182: my ($key,$value)=split(/=/,$pair);
4183: $hashref->{$key}=$value;
4184: }
4185: if (&untie_domain_hash($hashref)) {
4186: &Reply($client, "ok\n", $userinput);
4187: } else {
4188: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4189: "while attempting idput\n", $userinput);
4190: }
4191: } else {
4192: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4193: "while attempting idput\n", $userinput);
4194: }
4195:
4196: return 1;
4197: }
4198: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4199:
4200: #
4201: # Retrieves a set of id values from the id database.
4202: # Returns an & separated list of results, one for each requested id to the
4203: # client.
4204: #
4205: # Parameters:
4206: # $cmd - Command keyword that caused us to be dispatched.
4207: # $tail - Tail of the command. Consists of a colon separated:
4208: # domain - the domain whose id table we dump
4209: # ids Consists of an & separated list of
4210: # id keywords whose values will be fetched.
4211: # nonexisting keywords will have an empty value.
4212: # $client - Socket open on the client.
4213: #
4214: # Returns:
4215: # 1 - indicating processing should continue.
4216: # Side effects:
4217: # An & separated list of results is written to $client.
4218: #
4219: sub get_id_handler {
4220: my ($cmd, $tail, $client) = @_;
4221:
4222:
4223: my $userinput = "$client:$tail";
4224:
4225: my ($udom,$what)=split(/:/,$tail);
4226: chomp($what);
4227: my @queries=split(/\&/,$what);
4228: my $qresult='';
4229: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4230: if ($hashref) {
4231: for (my $i=0;$i<=$#queries;$i++) {
4232: $qresult.="$hashref->{$queries[$i]}&";
4233: }
4234: if (&untie_domain_hash($hashref)) {
4235: $qresult=~s/\&$//;
4236: &Reply($client, \$qresult, $userinput);
4237: } else {
4238: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4239: "while attempting idget\n",$userinput);
4240: }
4241: } else {
4242: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4243: "while attempting idget\n",$userinput);
4244: }
4245:
4246: return 1;
4247: }
4248: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4249:
4250: #
4251: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4252: #
4253: # Parameters
4254: # $cmd - Command keyword that caused us to be dispatched.
4255: # $tail - Tail of the command. Consists of a colon separated:
4256: # domain - the domain whose dcmail we are recording
4257: # email Consists of key=value pair
4258: # where key is unique msgid
4259: # and value is message (in XML)
4260: # $client - Socket open on the client.
4261: #
4262: # Returns:
4263: # 1 - indicating processing should continue.
4264: # Side effects
4265: # reply is written to $client.
4266: #
4267: sub put_dcmail_handler {
4268: my ($cmd,$tail,$client) = @_;
4269: my $userinput = "$cmd:$tail";
4270:
4271: my ($udom,$what)=split(/:/,$tail);
4272: chomp($what);
4273: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4274: if ($hashref) {
4275: my ($key,$value)=split(/=/,$what);
4276: $hashref->{$key}=$value;
4277: }
4278: if (&untie_domain_hash($hashref)) {
4279: &Reply($client, "ok\n", $userinput);
4280: } else {
4281: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4282: "while attempting dcmailput\n", $userinput);
4283: }
4284: return 1;
4285: }
4286: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4287:
4288: #
4289: # Retrieves broadcast e-mail from nohist_dcmail database
4290: # Returns to client an & separated list of key=value pairs,
4291: # where key is msgid and value is message information.
4292: #
4293: # Parameters
4294: # $cmd - Command keyword that caused us to be dispatched.
4295: # $tail - Tail of the command. Consists of a colon separated:
4296: # domain - the domain whose dcmail table we dump
4297: # startfilter - beginning of time window
4298: # endfilter - end of time window
4299: # sendersfilter - & separated list of username:domain
4300: # for senders to search for.
4301: # $client - Socket open on the client.
4302: #
4303: # Returns:
4304: # 1 - indicating processing should continue.
4305: # Side effects
4306: # reply (& separated list of msgid=messageinfo pairs) is
4307: # written to $client.
4308: #
4309: sub dump_dcmail_handler {
4310: my ($cmd, $tail, $client) = @_;
4311:
4312: my $userinput = "$cmd:$tail";
4313: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4314: chomp($sendersfilter);
4315: my @senders = ();
4316: if (defined($startfilter)) {
4317: $startfilter=&unescape($startfilter);
4318: } else {
4319: $startfilter='.';
4320: }
4321: if (defined($endfilter)) {
4322: $endfilter=&unescape($endfilter);
4323: } else {
4324: $endfilter='.';
4325: }
4326: if (defined($sendersfilter)) {
4327: $sendersfilter=&unescape($sendersfilter);
4328: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
4329: }
4330:
4331: my $qresult='';
4332: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4333: if ($hashref) {
4334: while (my ($key,$value) = each(%$hashref)) {
4335: my $match = 1;
4336: my ($timestamp,$subj,$uname,$udom) =
4337: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
4338: $subj = &unescape($subj);
4339: unless ($startfilter eq '.' || !defined($startfilter)) {
4340: if ($timestamp < $startfilter) {
4341: $match = 0;
4342: }
4343: }
4344: unless ($endfilter eq '.' || !defined($endfilter)) {
4345: if ($timestamp > $endfilter) {
4346: $match = 0;
4347: }
4348: }
4349: unless (@senders < 1) {
4350: unless (grep/^$uname:$udom$/,@senders) {
4351: $match = 0;
4352: }
4353: }
4354: if ($match == 1) {
4355: $qresult.=$key.'='.$value.'&';
4356: }
4357: }
4358: if (&untie_domain_hash($hashref)) {
4359: chop($qresult);
4360: &Reply($client, \$qresult, $userinput);
4361: } else {
4362: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4363: "while attempting dcmaildump\n", $userinput);
4364: }
4365: } else {
4366: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4367: "while attempting dcmaildump\n", $userinput);
4368: }
4369: return 1;
4370: }
4371:
4372: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4373:
4374: #
4375: # Puts domain roles in nohist_domainroles database
4376: #
4377: # Parameters
4378: # $cmd - Command keyword that caused us to be dispatched.
4379: # $tail - Tail of the command. Consists of a colon separated:
4380: # domain - the domain whose roles we are recording
4381: # role - Consists of key=value pair
4382: # where key is unique role
4383: # and value is start/end date information
4384: # $client - Socket open on the client.
4385: #
4386: # Returns:
4387: # 1 - indicating processing should continue.
4388: # Side effects
4389: # reply is written to $client.
4390: #
4391:
4392: sub put_domainroles_handler {
4393: my ($cmd,$tail,$client) = @_;
4394:
4395: my $userinput = "$cmd:$tail";
4396: my ($udom,$what)=split(/:/,$tail);
4397: chomp($what);
4398: my @pairs=split(/\&/,$what);
4399: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4400: if ($hashref) {
4401: foreach my $pair (@pairs) {
4402: my ($key,$value)=split(/=/,$pair);
4403: $hashref->{$key}=$value;
4404: }
4405: if (&untie_domain_hash($hashref)) {
4406: &Reply($client, "ok\n", $userinput);
4407: } else {
4408: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4409: "while attempting domroleput\n", $userinput);
4410: }
4411: } else {
4412: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4413: "while attempting domroleput\n", $userinput);
4414: }
4415:
4416: return 1;
4417: }
4418:
4419: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4420:
4421: #
4422: # Retrieves domain roles from nohist_domainroles database
4423: # Returns to client an & separated list of key=value pairs,
4424: # where key is role and value is start and end date information.
4425: #
4426: # Parameters
4427: # $cmd - Command keyword that caused us to be dispatched.
4428: # $tail - Tail of the command. Consists of a colon separated:
4429: # domain - the domain whose domain roles table we dump
4430: # $client - Socket open on the client.
4431: #
4432: # Returns:
4433: # 1 - indicating processing should continue.
4434: # Side effects
4435: # reply (& separated list of role=start/end info pairs) is
4436: # written to $client.
4437: #
4438: sub dump_domainroles_handler {
4439: my ($cmd, $tail, $client) = @_;
4440:
4441: my $userinput = "$cmd:$tail";
4442: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4443: chomp($rolesfilter);
4444: my @roles = ();
4445: if (defined($startfilter)) {
4446: $startfilter=&unescape($startfilter);
4447: } else {
4448: $startfilter='.';
4449: }
4450: if (defined($endfilter)) {
4451: $endfilter=&unescape($endfilter);
4452: } else {
4453: $endfilter='.';
4454: }
4455: if (defined($rolesfilter)) {
4456: $rolesfilter=&unescape($rolesfilter);
4457: @roles = split(/\&/,$rolesfilter);
4458: }
4459:
4460: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4461: if ($hashref) {
4462: my $qresult = '';
4463: while (my ($key,$value) = each(%$hashref)) {
4464: my $match = 1;
4465: my ($end,$start) = split(/:/,&unescape($value));
4466: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
4467: unless (@roles < 1) {
4468: unless (grep/^\Q$trole\E$/,@roles) {
4469: $match = 0;
4470: next;
4471: }
4472: }
4473: unless ($startfilter eq '.' || !defined($startfilter)) {
4474: if ((defined($start)) && ($start >= $startfilter)) {
4475: $match = 0;
4476: next;
4477: }
4478: }
4479: unless ($endfilter eq '.' || !defined($endfilter)) {
4480: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
4481: $match = 0;
4482: next;
4483: }
4484: }
4485: if ($match == 1) {
4486: $qresult.=$key.'='.$value.'&';
4487: }
4488: }
4489: if (&untie_domain_hash($hashref)) {
4490: chop($qresult);
4491: &Reply($client, \$qresult, $userinput);
4492: } else {
4493: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4494: "while attempting domrolesdump\n", $userinput);
4495: }
4496: } else {
4497: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4498: "while attempting domrolesdump\n", $userinput);
4499: }
4500: return 1;
4501: }
4502:
4503: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4504:
4505:
4506: # Process the tmpput command I'm not sure what this does.. Seems to
4507: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4508: # where Id is the client's ip concatenated with a sequence number.
4509: # The file will contain some value that is passed in. Is this e.g.
4510: # a login token?
4511: #
4512: # Parameters:
4513: # $cmd - The command that got us dispatched.
4514: # $tail - The remainder of the request following $cmd:
4515: # In this case this will be the contents of the file.
4516: # $client - Socket connected to the client.
4517: # Returns:
4518: # 1 indicating processing can continue.
4519: # Side effects:
4520: # A file is created in the local filesystem.
4521: # A reply is sent to the client.
4522: sub tmp_put_handler {
4523: my ($cmd, $what, $client) = @_;
4524:
4525: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4526:
4527: my ($record,$context) = split(/:/,$what);
4528: if ($context ne '') {
4529: chomp($context);
4530: $context = &unescape($context);
4531: }
4532: my ($id,$store);
4533: $tmpsnum++;
4534: if ($context eq 'resetpw') {
4535: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4536: } else {
4537: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4538: }
4539: $id=~s/\W/\_/g;
4540: $record=~s/\n//g;
4541: my $execdir=$perlvar{'lonDaemons'};
4542: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
4543: print $store $record;
4544: close $store;
4545: &Reply($client, \$id, $userinput);
4546: } else {
4547: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4548: "while attempting tmpput\n", $userinput);
4549: }
4550: return 1;
4551:
4552: }
4553: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
4554:
4555: # Processes the tmpget command. This command returns the contents
4556: # of a temporary resource file(?) created via tmpput.
4557: #
4558: # Paramters:
4559: # $cmd - Command that got us dispatched.
4560: # $id - Tail of the command, contain the id of the resource
4561: # we want to fetch.
4562: # $client - socket open on the client.
4563: # Return:
4564: # 1 - Inidcating processing can continue.
4565: # Side effects:
4566: # A reply is sent to the client.
4567: #
4568: sub tmp_get_handler {
4569: my ($cmd, $id, $client) = @_;
4570:
4571: my $userinput = "$cmd:$id";
4572:
4573:
4574: $id=~s/\W/\_/g;
4575: my $store;
4576: my $execdir=$perlvar{'lonDaemons'};
4577: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4578: my $reply=<$store>;
4579: &Reply( $client, \$reply, $userinput);
4580: close $store;
4581: } else {
4582: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4583: "while attempting tmpget\n", $userinput);
4584: }
4585:
4586: return 1;
4587: }
4588: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
4589:
4590: #
4591: # Process the tmpdel command. This command deletes a temp resource
4592: # created by the tmpput command.
4593: #
4594: # Parameters:
4595: # $cmd - Command that got us here.
4596: # $id - Id of the temporary resource created.
4597: # $client - socket open on the client process.
4598: #
4599: # Returns:
4600: # 1 - Indicating processing should continue.
4601: # Side Effects:
4602: # A file is deleted
4603: # A reply is sent to the client.
4604: sub tmp_del_handler {
4605: my ($cmd, $id, $client) = @_;
4606:
4607: my $userinput= "$cmd:$id";
4608:
4609: chomp($id);
4610: $id=~s/\W/\_/g;
4611: my $execdir=$perlvar{'lonDaemons'};
4612: if (unlink("$execdir/tmp/$id.tmp")) {
4613: &Reply($client, "ok\n", $userinput);
4614: } else {
4615: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4616: "while attempting tmpdel\n", $userinput);
4617: }
4618:
4619: return 1;
4620:
4621: }
4622: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
4623:
4624: #
4625: # Processes the setannounce command. This command
4626: # creates a file named announce.txt in the top directory of
4627: # the documentn root and sets its contents. The announce.txt file is
4628: # printed in its entirety at the LonCAPA login page. Note:
4629: # once the announcement.txt fileis created it cannot be deleted.
4630: # However, setting the contents of the file to empty removes the
4631: # announcement from the login page of loncapa so who cares.
4632: #
4633: # Parameters:
4634: # $cmd - The command that got us dispatched.
4635: # $announcement - The text of the announcement.
4636: # $client - Socket open on the client process.
4637: # Retunrns:
4638: # 1 - Indicating request processing should continue
4639: # Side Effects:
4640: # The file {DocRoot}/announcement.txt is created.
4641: # A reply is sent to $client.
4642: #
4643: sub set_announce_handler {
4644: my ($cmd, $announcement, $client) = @_;
4645:
4646: my $userinput = "$cmd:$announcement";
4647:
4648: chomp($announcement);
4649: $announcement=&unescape($announcement);
4650: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4651: '/announcement.txt')) {
4652: print $store $announcement;
4653: close $store;
4654: &Reply($client, "ok\n", $userinput);
4655: } else {
4656: &Failure($client, "error: ".($!+0)."\n", $userinput);
4657: }
4658:
4659: return 1;
4660: }
4661: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
4662:
4663: #
4664: # Return the version of the daemon. This can be used to determine
4665: # the compatibility of cross version installations or, alternatively to
4666: # simply know who's out of date and who isn't. Note that the version
4667: # is returned concatenated with the tail.
4668: # Parameters:
4669: # $cmd - the request that dispatched to us.
4670: # $tail - Tail of the request (client's version?).
4671: # $client - Socket open on the client.
4672: #Returns:
4673: # 1 - continue processing requests.
4674: # Side Effects:
4675: # Replies with version to $client.
4676: sub get_version_handler {
4677: my ($cmd, $tail, $client) = @_;
4678:
4679: my $userinput = $cmd.$tail;
4680:
4681: &Reply($client, &version($userinput)."\n", $userinput);
4682:
4683:
4684: return 1;
4685: }
4686: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
4687:
4688: # Set the current host and domain. This is used to support
4689: # multihomed systems. Each IP of the system, or even separate daemons
4690: # on the same IP can be treated as handling a separate lonCAPA virtual
4691: # machine. This command selects the virtual lonCAPA. The client always
4692: # knows the right one since it is lonc and it is selecting the domain/system
4693: # from the hosts.tab file.
4694: # Parameters:
4695: # $cmd - Command that dispatched us.
4696: # $tail - Tail of the command (domain/host requested).
4697: # $socket - Socket open on the client.
4698: #
4699: # Returns:
4700: # 1 - Indicates the program should continue to process requests.
4701: # Side-effects:
4702: # The default domain/system context is modified for this daemon.
4703: # a reply is sent to the client.
4704: #
4705: sub set_virtual_host_handler {
4706: my ($cmd, $tail, $socket) = @_;
4707:
4708: my $userinput ="$cmd:$tail";
4709:
4710: &Reply($client, &sethost($userinput)."\n", $userinput);
4711:
4712:
4713: return 1;
4714: }
4715: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
4716:
4717: # Process a request to exit:
4718: # - "bye" is sent to the client.
4719: # - The client socket is shutdown and closed.
4720: # - We indicate to the caller that we should exit.
4721: # Formal Parameters:
4722: # $cmd - The command that got us here.
4723: # $tail - Tail of the command (empty).
4724: # $client - Socket open on the tail.
4725: # Returns:
4726: # 0 - Indicating the program should exit!!
4727: #
4728: sub exit_handler {
4729: my ($cmd, $tail, $client) = @_;
4730:
4731: my $userinput = "$cmd:$tail";
4732:
4733: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4734: &Reply($client, "bye\n", $userinput);
4735: $client->shutdown(2); # shutdown the socket forcibly.
4736: $client->close();
4737:
4738: return 0;
4739: }
4740: ®ister_handler("exit", \&exit_handler, 0,1,1);
4741: ®ister_handler("init", \&exit_handler, 0,1,1);
4742: ®ister_handler("quit", \&exit_handler, 0,1,1);
4743:
4744: # Determine if auto-enrollment is enabled.
4745: # Note that the original had what I believe to be a defect.
4746: # The original returned 0 if the requestor was not a registerd client.
4747: # It should return "refused".
4748: # Formal Parameters:
4749: # $cmd - The command that invoked us.
4750: # $tail - The tail of the command (Extra command parameters.
4751: # $client - The socket open on the client that issued the request.
4752: # Returns:
4753: # 1 - Indicating processing should continue.
4754: #
4755: sub enrollment_enabled_handler {
4756: my ($cmd, $tail, $client) = @_;
4757: my $userinput = $cmd.":".$tail; # For logging purposes.
4758:
4759:
4760: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4761:
4762: my $outcome = &localenroll::run($cdom);
4763: &Reply($client, \$outcome, $userinput);
4764:
4765: return 1;
4766: }
4767: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4768:
4769: #
4770: # Validate an institutional code used for a LON-CAPA course.
4771: #
4772: # Formal Parameters:
4773: # $cmd - The command request that got us dispatched.
4774: # $tail - The tail of the command. In this case,
4775: # this is a colon separated set of words that will be split
4776: # into:
4777: # $dom - The domain for which the check of
4778: # institutional course code will occur.
4779: #
4780: # $instcode - The institutional code for the course
4781: # being requested, or validated for rights
4782: # to request.
4783: #
4784: # $owner - The course requestor (who will be the
4785: # course owner, in the form username:domain
4786: #
4787: # $client - Socket open on the client.
4788: # Returns:
4789: # 1 - Indicating processing should continue.
4790: #
4791: sub validate_instcode_handler {
4792: my ($cmd, $tail, $client) = @_;
4793: my $userinput = "$cmd:$tail";
4794: my ($dom,$instcode,$owner) = split(/:/, $tail);
4795: $instcode = &unescape($instcode);
4796: $owner = &unescape($owner);
4797: my ($outcome,$description) =
4798: &localenroll::validate_instcode($dom,$instcode,$owner);
4799: my $result = &escape($outcome).'&'.&escape($description);
4800: &Reply($client, \$result, $userinput);
4801:
4802: return 1;
4803: }
4804: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
4805:
4806: # Get the official sections for which auto-enrollment is possible.
4807: # Since the admin people won't know about 'unofficial sections'
4808: # we cannot auto-enroll on them.
4809: # Formal Parameters:
4810: # $cmd - The command request that got us dispatched here.
4811: # $tail - The remainder of the request. In our case this
4812: # will be split into:
4813: # $coursecode - The course name from the admin point of view.
4814: # $cdom - The course's domain(?).
4815: # $client - Socket open on the client.
4816: # Returns:
4817: # 1 - Indiciting processing should continue.
4818: #
4819: sub get_sections_handler {
4820: my ($cmd, $tail, $client) = @_;
4821: my $userinput = "$cmd:$tail";
4822:
4823: my ($coursecode, $cdom) = split(/:/, $tail);
4824: my @secs = &localenroll::get_sections($coursecode,$cdom);
4825: my $seclist = &escape(join(':',@secs));
4826:
4827: &Reply($client, \$seclist, $userinput);
4828:
4829:
4830: return 1;
4831: }
4832: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4833:
4834: # Validate the owner of a new course section.
4835: #
4836: # Formal Parameters:
4837: # $cmd - Command that got us dispatched.
4838: # $tail - the remainder of the command. For us this consists of a
4839: # colon separated string containing:
4840: # $inst - Course Id from the institutions point of view.
4841: # $owner - Proposed owner of the course.
4842: # $cdom - Domain of the course (from the institutions
4843: # point of view?)..
4844: # $client - Socket open on the client.
4845: #
4846: # Returns:
4847: # 1 - Processing should continue.
4848: #
4849: sub validate_course_owner_handler {
4850: my ($cmd, $tail, $client) = @_;
4851: my $userinput = "$cmd:$tail";
4852: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4853:
4854: $owner = &unescape($owner);
4855: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4856: &Reply($client, \$outcome, $userinput);
4857:
4858:
4859:
4860: return 1;
4861: }
4862: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
4863:
4864: #
4865: # Validate a course section in the official schedule of classes
4866: # from the institutions point of view (part of autoenrollment).
4867: #
4868: # Formal Parameters:
4869: # $cmd - The command request that got us dispatched.
4870: # $tail - The tail of the command. In this case,
4871: # this is a colon separated set of words that will be split
4872: # into:
4873: # $inst_course_id - The course/section id from the
4874: # institutions point of view.
4875: # $cdom - The domain from the institutions
4876: # point of view.
4877: # $client - Socket open on the client.
4878: # Returns:
4879: # 1 - Indicating processing should continue.
4880: #
4881: sub validate_course_section_handler {
4882: my ($cmd, $tail, $client) = @_;
4883: my $userinput = "$cmd:$tail";
4884: my ($inst_course_id, $cdom) = split(/:/, $tail);
4885:
4886: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4887: &Reply($client, \$outcome, $userinput);
4888:
4889:
4890: return 1;
4891: }
4892: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4893:
4894: #
4895: # Validate course owner's access to enrollment data for specific class section.
4896: #
4897: #
4898: # Formal Parameters:
4899: # $cmd - The command request that got us dispatched.
4900: # $tail - The tail of the command. In this case this is a colon separated
4901: # set of words that will be split into:
4902: # $inst_class - Institutional code for the specific class section
4903: # $courseowner - The escaped username:domain of the course owner
4904: # $cdom - The domain of the course from the institution's
4905: # point of view.
4906: # $client - The socket open on the client.
4907: # Returns:
4908: # 1 - continue processing.
4909: #
4910:
4911: sub validate_class_access_handler {
4912: my ($cmd, $tail, $client) = @_;
4913: my $userinput = "$cmd:$tail";
4914: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
4915: my $owners = &unescape($ownerlist);
4916: my $outcome;
4917: eval {
4918: local($SIG{__DIE__})='DEFAULT';
4919: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
4920: };
4921: &Reply($client,\$outcome, $userinput);
4922:
4923: return 1;
4924: }
4925: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
4926:
4927: #
4928: # Create a password for a new LON-CAPA user added by auto-enrollment.
4929: # Only used for case where authentication method for new user is localauth
4930: #
4931: # Formal Parameters:
4932: # $cmd - The command request that got us dispatched.
4933: # $tail - The tail of the command. In this case this is a colon separated
4934: # set of words that will be split into:
4935: # $authparam - An authentication parameter (localauth parameter).
4936: # $cdom - The domain of the course from the institution's
4937: # point of view.
4938: # $client - The socket open on the client.
4939: # Returns:
4940: # 1 - continue processing.
4941: #
4942: sub create_auto_enroll_password_handler {
4943: my ($cmd, $tail, $client) = @_;
4944: my $userinput = "$cmd:$tail";
4945:
4946: my ($authparam, $cdom) = split(/:/, $userinput);
4947:
4948: my ($create_passwd,$authchk);
4949: ($authparam,
4950: $create_passwd,
4951: $authchk) = &localenroll::create_password($authparam,$cdom);
4952:
4953: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4954: $userinput);
4955:
4956:
4957: return 1;
4958: }
4959: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4960: 0, 1, 0);
4961:
4962: # Retrieve and remove temporary files created by/during autoenrollment.
4963: #
4964: # Formal Parameters:
4965: # $cmd - The command that got us dispatched.
4966: # $tail - The tail of the command. In our case this is a colon
4967: # separated list that will be split into:
4968: # $filename - The name of the file to remove.
4969: # The filename is given as a path relative to
4970: # the LonCAPA temp file directory.
4971: # $client - Socket open on the client.
4972: #
4973: # Returns:
4974: # 1 - Continue processing.
4975: sub retrieve_auto_file_handler {
4976: my ($cmd, $tail, $client) = @_;
4977: my $userinput = "cmd:$tail";
4978:
4979: my ($filename) = split(/:/, $tail);
4980:
4981: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4982: if ( (-e $source) && ($filename ne '') ) {
4983: my $reply = '';
4984: if (open(my $fh,$source)) {
4985: while (<$fh>) {
4986: chomp($_);
4987: $_ =~ s/^\s+//g;
4988: $_ =~ s/\s+$//g;
4989: $reply .= $_;
4990: }
4991: close($fh);
4992: &Reply($client, &escape($reply)."\n", $userinput);
4993:
4994: # Does this have to be uncommented??!? (RF).
4995: #
4996: # unlink($source);
4997: } else {
4998: &Failure($client, "error\n", $userinput);
4999: }
5000: } else {
5001: &Failure($client, "error\n", $userinput);
5002: }
5003:
5004:
5005: return 1;
5006: }
5007: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5008:
5009: sub crsreq_checks_handler {
5010: my ($cmd, $tail, $client) = @_;
5011: my $userinput = "$cmd:$tail";
5012: my $dom = $tail;
5013: my $result;
5014: my @reqtypes = ('official','unofficial','community');
5015: eval {
5016: local($SIG{__DIE__})='DEFAULT';
5017: my %validations;
5018: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5019: \%validations);
5020: if ($response eq 'ok') {
5021: foreach my $key (keys(%validations)) {
5022: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5023: }
5024: $result =~ s/\&$//;
5025: } else {
5026: $result = 'error';
5027: }
5028: };
5029: if (!$@) {
5030: &Reply($client, \$result, $userinput);
5031: } else {
5032: &Failure($client,"unknown_cmd\n",$userinput);
5033: }
5034: return 1;
5035: }
5036: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5037:
5038: sub validate_crsreq_handler {
5039: my ($cmd, $tail, $client) = @_;
5040: my $userinput = "$cmd:$tail";
5041: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
5042: $instcode = &unescape($instcode);
5043: $owner = &unescape($owner);
5044: $crstype = &unescape($crstype);
5045: $inststatuslist = &unescape($inststatuslist);
5046: $instcode = &unescape($instcode);
5047: $instseclist = &unescape($instseclist);
5048: my $outcome;
5049: eval {
5050: local($SIG{__DIE__})='DEFAULT';
5051: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5052: $inststatuslist,$instcode,
5053: $instseclist);
5054: };
5055: if (!$@) {
5056: &Reply($client, \$outcome, $userinput);
5057: } else {
5058: &Failure($client,"unknown_cmd\n",$userinput);
5059: }
5060: return 1;
5061: }
5062: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5063:
5064: #
5065: # Read and retrieve institutional code format (for support form).
5066: # Formal Parameters:
5067: # $cmd - Command that dispatched us.
5068: # $tail - Tail of the command. In this case it conatins
5069: # the course domain and the coursename.
5070: # $client - Socket open on the client.
5071: # Returns:
5072: # 1 - Continue processing.
5073: #
5074: sub get_institutional_code_format_handler {
5075: my ($cmd, $tail, $client) = @_;
5076: my $userinput = "$cmd:$tail";
5077:
5078: my $reply;
5079: my($cdom,$course) = split(/:/,$tail);
5080: my @pairs = split/\&/,$course;
5081: my %instcodes = ();
5082: my %codes = ();
5083: my @codetitles = ();
5084: my %cat_titles = ();
5085: my %cat_order = ();
5086: foreach (@pairs) {
5087: my ($key,$value) = split/=/,$_;
5088: $instcodes{&unescape($key)} = &unescape($value);
5089: }
5090: my $formatreply = &localenroll::instcode_format($cdom,
5091: \%instcodes,
5092: \%codes,
5093: \@codetitles,
5094: \%cat_titles,
5095: \%cat_order);
5096: if ($formatreply eq 'ok') {
5097: my $codes_str = &Apache::lonnet::hash2str(%codes);
5098: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5099: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5100: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5101: &Reply($client,
5102: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5103: .$cat_order_str."\n",
5104: $userinput);
5105: } else {
5106: # this else branch added by RF since if not ok, lonc will
5107: # hang waiting on reply until timeout.
5108: #
5109: &Reply($client, "format_error\n", $userinput);
5110: }
5111:
5112: return 1;
5113: }
5114: ®ister_handler("autoinstcodeformat",
5115: \&get_institutional_code_format_handler,0,1,0);
5116:
5117: sub get_institutional_defaults_handler {
5118: my ($cmd, $tail, $client) = @_;
5119: my $userinput = "$cmd:$tail";
5120:
5121: my $dom = $tail;
5122: my %defaults_hash;
5123: my @code_order;
5124: my $outcome;
5125: eval {
5126: local($SIG{__DIE__})='DEFAULT';
5127: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5128: \@code_order);
5129: };
5130: if (!$@) {
5131: if ($outcome eq 'ok') {
5132: my $result='';
5133: while (my ($key,$value) = each(%defaults_hash)) {
5134: $result.=&escape($key).'='.&escape($value).'&';
5135: }
5136: $result .= 'code_order='.&escape(join('&',@code_order));
5137: &Reply($client,\$result,$userinput);
5138: } else {
5139: &Reply($client,"error\n", $userinput);
5140: }
5141: } else {
5142: &Failure($client,"unknown_cmd\n",$userinput);
5143: }
5144: }
5145: ®ister_handler("autoinstcodedefaults",
5146: \&get_institutional_defaults_handler,0,1,0);
5147:
5148: sub get_possible_instcodes_handler {
5149: my ($cmd, $tail, $client) = @_;
5150: my $userinput = "$cmd:$tail";
5151:
5152: my $reply;
5153: my $cdom = $tail;
5154: my (@codetitles,%cat_titles,%cat_order,@code_order);
5155: my $formatreply = &localenroll::possible_instcodes($cdom,
5156: \@codetitles,
5157: \%cat_titles,
5158: \%cat_order,
5159: \@code_order);
5160: if ($formatreply eq 'ok') {
5161: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5162: $result .= join('&',map {&escape($_);} (@code_order)).':';
5163: foreach my $key (keys(%cat_titles)) {
5164: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5165: }
5166: $result =~ s/\&$//;
5167: $result .= ':';
5168: foreach my $key (keys(%cat_order)) {
5169: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5170: }
5171: $result =~ s/\&$//;
5172: &Reply($client,\$result,$userinput);
5173: } else {
5174: &Reply($client, "format_error\n", $userinput);
5175: }
5176: return 1;
5177: }
5178: ®ister_handler("autopossibleinstcodes",
5179: \&get_possible_instcodes_handler,0,1,0);
5180:
5181: sub get_institutional_user_rules {
5182: my ($cmd, $tail, $client) = @_;
5183: my $userinput = "$cmd:$tail";
5184: my $dom = &unescape($tail);
5185: my (%rules_hash,@rules_order);
5186: my $outcome;
5187: eval {
5188: local($SIG{__DIE__})='DEFAULT';
5189: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5190: };
5191: if (!$@) {
5192: if ($outcome eq 'ok') {
5193: my $result;
5194: foreach my $key (keys(%rules_hash)) {
5195: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5196: }
5197: $result =~ s/\&$//;
5198: $result .= ':';
5199: if (@rules_order > 0) {
5200: foreach my $item (@rules_order) {
5201: $result .= &escape($item).'&';
5202: }
5203: }
5204: $result =~ s/\&$//;
5205: &Reply($client,\$result,$userinput);
5206: } else {
5207: &Reply($client,"error\n", $userinput);
5208: }
5209: } else {
5210: &Failure($client,"unknown_cmd\n",$userinput);
5211: }
5212: }
5213: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5214:
5215: sub get_institutional_id_rules {
5216: my ($cmd, $tail, $client) = @_;
5217: my $userinput = "$cmd:$tail";
5218: my $dom = &unescape($tail);
5219: my (%rules_hash,@rules_order);
5220: my $outcome;
5221: eval {
5222: local($SIG{__DIE__})='DEFAULT';
5223: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5224: };
5225: if (!$@) {
5226: if ($outcome eq 'ok') {
5227: my $result;
5228: foreach my $key (keys(%rules_hash)) {
5229: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5230: }
5231: $result =~ s/\&$//;
5232: $result .= ':';
5233: if (@rules_order > 0) {
5234: foreach my $item (@rules_order) {
5235: $result .= &escape($item).'&';
5236: }
5237: }
5238: $result =~ s/\&$//;
5239: &Reply($client,\$result,$userinput);
5240: } else {
5241: &Reply($client,"error\n", $userinput);
5242: }
5243: } else {
5244: &Failure($client,"unknown_cmd\n",$userinput);
5245: }
5246: }
5247: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
5248:
5249: sub get_institutional_selfcreate_rules {
5250: my ($cmd, $tail, $client) = @_;
5251: my $userinput = "$cmd:$tail";
5252: my $dom = &unescape($tail);
5253: my (%rules_hash,@rules_order);
5254: my $outcome;
5255: eval {
5256: local($SIG{__DIE__})='DEFAULT';
5257: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
5258: };
5259: if (!$@) {
5260: if ($outcome eq 'ok') {
5261: my $result;
5262: foreach my $key (keys(%rules_hash)) {
5263: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5264: }
5265: $result =~ s/\&$//;
5266: $result .= ':';
5267: if (@rules_order > 0) {
5268: foreach my $item (@rules_order) {
5269: $result .= &escape($item).'&';
5270: }
5271: }
5272: $result =~ s/\&$//;
5273: &Reply($client,\$result,$userinput);
5274: } else {
5275: &Reply($client,"error\n", $userinput);
5276: }
5277: } else {
5278: &Failure($client,"unknown_cmd\n",$userinput);
5279: }
5280: }
5281: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
5282:
5283:
5284: sub institutional_username_check {
5285: my ($cmd, $tail, $client) = @_;
5286: my $userinput = "$cmd:$tail";
5287: my %rulecheck;
5288: my $outcome;
5289: my ($udom,$uname,@rules) = split(/:/,$tail);
5290: $udom = &unescape($udom);
5291: $uname = &unescape($uname);
5292: @rules = map {&unescape($_);} (@rules);
5293: eval {
5294: local($SIG{__DIE__})='DEFAULT';
5295: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
5296: };
5297: if (!$@) {
5298: if ($outcome eq 'ok') {
5299: my $result='';
5300: foreach my $key (keys(%rulecheck)) {
5301: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5302: }
5303: &Reply($client,\$result,$userinput);
5304: } else {
5305: &Reply($client,"error\n", $userinput);
5306: }
5307: } else {
5308: &Failure($client,"unknown_cmd\n",$userinput);
5309: }
5310: }
5311: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
5312:
5313: sub institutional_id_check {
5314: my ($cmd, $tail, $client) = @_;
5315: my $userinput = "$cmd:$tail";
5316: my %rulecheck;
5317: my $outcome;
5318: my ($udom,$id,@rules) = split(/:/,$tail);
5319: $udom = &unescape($udom);
5320: $id = &unescape($id);
5321: @rules = map {&unescape($_);} (@rules);
5322: eval {
5323: local($SIG{__DIE__})='DEFAULT';
5324: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
5325: };
5326: if (!$@) {
5327: if ($outcome eq 'ok') {
5328: my $result='';
5329: foreach my $key (keys(%rulecheck)) {
5330: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5331: }
5332: &Reply($client,\$result,$userinput);
5333: } else {
5334: &Reply($client,"error\n", $userinput);
5335: }
5336: } else {
5337: &Failure($client,"unknown_cmd\n",$userinput);
5338: }
5339: }
5340: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
5341:
5342: sub institutional_selfcreate_check {
5343: my ($cmd, $tail, $client) = @_;
5344: my $userinput = "$cmd:$tail";
5345: my %rulecheck;
5346: my $outcome;
5347: my ($udom,$email,@rules) = split(/:/,$tail);
5348: $udom = &unescape($udom);
5349: $email = &unescape($email);
5350: @rules = map {&unescape($_);} (@rules);
5351: eval {
5352: local($SIG{__DIE__})='DEFAULT';
5353: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
5354: };
5355: if (!$@) {
5356: if ($outcome eq 'ok') {
5357: my $result='';
5358: foreach my $key (keys(%rulecheck)) {
5359: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5360: }
5361: &Reply($client,\$result,$userinput);
5362: } else {
5363: &Reply($client,"error\n", $userinput);
5364: }
5365: } else {
5366: &Failure($client,"unknown_cmd\n",$userinput);
5367: }
5368: }
5369: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
5370:
5371: # Get domain specific conditions for import of student photographs to a course
5372: #
5373: # Retrieves information from photo_permission subroutine in localenroll.
5374: # Returns outcome (ok) if no processing errors, and whether course owner is
5375: # required to accept conditions of use (yes/no).
5376: #
5377: #
5378: sub photo_permission_handler {
5379: my ($cmd, $tail, $client) = @_;
5380: my $userinput = "$cmd:$tail";
5381: my $cdom = $tail;
5382: my ($perm_reqd,$conditions);
5383: my $outcome;
5384: eval {
5385: local($SIG{__DIE__})='DEFAULT';
5386: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
5387: \$conditions);
5388: };
5389: if (!$@) {
5390: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
5391: $userinput);
5392: } else {
5393: &Failure($client,"unknown_cmd\n",$userinput);
5394: }
5395: return 1;
5396: }
5397: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
5398:
5399: #
5400: # Checks if student photo is available for a user in the domain, in the user's
5401: # directory (in /userfiles/internal/studentphoto.jpg).
5402: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
5403: # the student's photo.
5404:
5405: sub photo_check_handler {
5406: my ($cmd, $tail, $client) = @_;
5407: my $userinput = "$cmd:$tail";
5408: my ($udom,$uname,$pid) = split(/:/,$tail);
5409: $udom = &unescape($udom);
5410: $uname = &unescape($uname);
5411: $pid = &unescape($pid);
5412: my $path=&propath($udom,$uname).'/userfiles/internal/';
5413: if (!-e $path) {
5414: &mkpath($path);
5415: }
5416: my $response;
5417: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
5418: $result .= ':'.$response;
5419: &Reply($client, &escape($result)."\n",$userinput);
5420: return 1;
5421: }
5422: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
5423:
5424: #
5425: # Retrieve information from localenroll about whether to provide a button
5426: # for users who have enbled import of student photos to initiate an
5427: # update of photo files for registered students. Also include
5428: # comment to display alongside button.
5429:
5430: sub photo_choice_handler {
5431: my ($cmd, $tail, $client) = @_;
5432: my $userinput = "$cmd:$tail";
5433: my $cdom = &unescape($tail);
5434: my ($update,$comment);
5435: eval {
5436: local($SIG{__DIE__})='DEFAULT';
5437: ($update,$comment) = &localenroll::manager_photo_update($cdom);
5438: };
5439: if (!$@) {
5440: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
5441: } else {
5442: &Failure($client,"unknown_cmd\n",$userinput);
5443: }
5444: return 1;
5445: }
5446: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
5447:
5448: #
5449: # Gets a student's photo to exist (in the correct image type) in the user's
5450: # directory.
5451: # Formal Parameters:
5452: # $cmd - The command request that got us dispatched.
5453: # $tail - A colon separated set of words that will be split into:
5454: # $domain - student's domain
5455: # $uname - student username
5456: # $type - image type desired
5457: # $client - The socket open on the client.
5458: # Returns:
5459: # 1 - continue processing.
5460:
5461: sub student_photo_handler {
5462: my ($cmd, $tail, $client) = @_;
5463: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
5464:
5465: my $path=&propath($domain,$uname). '/userfiles/internal/';
5466: my $filename = 'studentphoto.'.$ext;
5467: if ($type eq 'thumbnail') {
5468: $filename = 'studentphoto_tn.'.$ext;
5469: }
5470: if (-e $path.$filename) {
5471: &Reply($client,"ok\n","$cmd:$tail");
5472: return 1;
5473: }
5474: &mkpath($path);
5475: my $file;
5476: if ($type eq 'thumbnail') {
5477: eval {
5478: local($SIG{__DIE__})='DEFAULT';
5479: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
5480: };
5481: } else {
5482: $file=&localstudentphoto::fetch($domain,$uname);
5483: }
5484: if (!$file) {
5485: &Failure($client,"unavailable\n","$cmd:$tail");
5486: return 1;
5487: }
5488: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
5489: if (-e $path.$filename) {
5490: &Reply($client,"ok\n","$cmd:$tail");
5491: return 1;
5492: }
5493: &Failure($client,"unable_to_convert\n","$cmd:$tail");
5494: return 1;
5495: }
5496: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
5497:
5498: sub inst_usertypes_handler {
5499: my ($cmd, $domain, $client) = @_;
5500: my $res;
5501: my $userinput = $cmd.":".$domain; # For logging purposes.
5502: my (%typeshash,@order,$result);
5503: eval {
5504: local($SIG{__DIE__})='DEFAULT';
5505: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
5506: };
5507: if ($result eq 'ok') {
5508: if (keys(%typeshash) > 0) {
5509: foreach my $key (keys(%typeshash)) {
5510: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
5511: }
5512: }
5513: $res=~s/\&$//;
5514: $res .= ':';
5515: if (@order > 0) {
5516: foreach my $item (@order) {
5517: $res .= &escape($item).'&';
5518: }
5519: }
5520: $res=~s/\&$//;
5521: }
5522: &Reply($client, \$res, $userinput);
5523: return 1;
5524: }
5525: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
5526:
5527: # mkpath makes all directories for a file, expects an absolute path with a
5528: # file or a trailing / if just a dir is passed
5529: # returns 1 on success 0 on failure
5530: sub mkpath {
5531: my ($file)=@_;
5532: my @parts=split(/\//,$file,-1);
5533: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
5534: for (my $i=3;$i<= ($#parts-1);$i++) {
5535: $now.='/'.$parts[$i];
5536: if (!-e $now) {
5537: if (!mkdir($now,0770)) { return 0; }
5538: }
5539: }
5540: return 1;
5541: }
5542:
5543: #---------------------------------------------------------------
5544: #
5545: # Getting, decoding and dispatching requests:
5546: #
5547: #
5548: # Get a Request:
5549: # Gets a Request message from the client. The transaction
5550: # is defined as a 'line' of text. We remove the new line
5551: # from the text line.
5552: #
5553: sub get_request {
5554: my $input = <$client>;
5555: chomp($input);
5556:
5557: &Debug("get_request: Request = $input\n");
5558:
5559: &status('Processing '.$clientname.':'.$input);
5560:
5561: return $input;
5562: }
5563: #---------------------------------------------------------------
5564: #
5565: # Process a request. This sub should shrink as each action
5566: # gets farmed out into a separat sub that is registered
5567: # with the dispatch hash.
5568: #
5569: # Parameters:
5570: # user_input - The request received from the client (lonc).
5571: # Returns:
5572: # true to keep processing, false if caller should exit.
5573: #
5574: sub process_request {
5575: my ($userinput) = @_; # Easier for now to break style than to
5576: # fix all the userinput -> user_input.
5577: my $wasenc = 0; # True if request was encrypted.
5578: # ------------------------------------------------------------ See if encrypted
5579: # for command
5580: # sethost:<server>
5581: # <command>:<args>
5582: # we just send it to the processor
5583: # for
5584: # sethost:<server>:<command>:<args>
5585: # we do the implict set host and then do the command
5586: if ($userinput =~ /^sethost:/) {
5587: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
5588: if (defined($userinput)) {
5589: &sethost("$cmd:$newid");
5590: } else {
5591: $userinput = "$cmd:$newid";
5592: }
5593: }
5594:
5595: if ($userinput =~ /^enc/) {
5596: $userinput = decipher($userinput);
5597: $wasenc=1;
5598: if(!$userinput) { # Cipher not defined.
5599: &Failure($client, "error: Encrypted data without negotated key\n");
5600: return 0;
5601: }
5602: }
5603: Debug("process_request: $userinput\n");
5604:
5605: #
5606: # The 'correct way' to add a command to lond is now to
5607: # write a sub to execute it and Add it to the command dispatch
5608: # hash via a call to register_handler.. The comments to that
5609: # sub should give you enough to go on to show how to do this
5610: # along with the examples that are building up as this code
5611: # is getting refactored. Until all branches of the
5612: # if/elseif monster below have been factored out into
5613: # separate procesor subs, if the dispatch hash is missing
5614: # the command keyword, we will fall through to the remainder
5615: # of the if/else chain below in order to keep this thing in
5616: # working order throughout the transmogrification.
5617:
5618: my ($command, $tail) = split(/:/, $userinput, 2);
5619: chomp($command);
5620: chomp($tail);
5621: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
5622: $command =~ s/(\r)//; # And this too for parameterless commands.
5623: if(!$tail) {
5624: $tail =""; # defined but blank.
5625: }
5626:
5627: &Debug("Command received: $command, encoded = $wasenc");
5628:
5629: if(defined $Dispatcher{$command}) {
5630:
5631: my $dispatch_info = $Dispatcher{$command};
5632: my $handler = $$dispatch_info[0];
5633: my $need_encode = $$dispatch_info[1];
5634: my $client_types = $$dispatch_info[2];
5635: Debug("Matched dispatch hash: mustencode: $need_encode "
5636: ."ClientType $client_types");
5637:
5638: # Validate the request:
5639:
5640: my $ok = 1;
5641: my $requesterprivs = 0;
5642: if(&isClient()) {
5643: $requesterprivs |= $CLIENT_OK;
5644: }
5645: if(&isManager()) {
5646: $requesterprivs |= $MANAGER_OK;
5647: }
5648: if($need_encode && (!$wasenc)) {
5649: Debug("Must encode but wasn't: $need_encode $wasenc");
5650: $ok = 0;
5651: }
5652: if(($client_types & $requesterprivs) == 0) {
5653: Debug("Client not privileged to do this operation");
5654: $ok = 0;
5655: }
5656:
5657: if($ok) {
5658: Debug("Dispatching to handler $command $tail");
5659: my $keep_going = &$handler($command, $tail, $client);
5660: return $keep_going;
5661: } else {
5662: Debug("Refusing to dispatch because client did not match requirements");
5663: Failure($client, "refused\n", $userinput);
5664: return 1;
5665: }
5666:
5667: }
5668:
5669: print $client "unknown_cmd\n";
5670: # -------------------------------------------------------------------- complete
5671: Debug("process_request - returning 1");
5672: return 1;
5673: }
5674: #
5675: # Decipher encoded traffic
5676: # Parameters:
5677: # input - Encoded data.
5678: # Returns:
5679: # Decoded data or undef if encryption key was not yet negotiated.
5680: # Implicit input:
5681: # cipher - This global holds the negotiated encryption key.
5682: #
5683: sub decipher {
5684: my ($input) = @_;
5685: my $output = '';
5686:
5687:
5688: if($cipher) {
5689: my($enc, $enclength, $encinput) = split(/:/, $input);
5690: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5691: $output .=
5692: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5693: }
5694: return substr($output, 0, $enclength);
5695: } else {
5696: return undef;
5697: }
5698: }
5699:
5700: #
5701: # Register a command processor. This function is invoked to register a sub
5702: # to process a request. Once registered, the ProcessRequest sub can automatically
5703: # dispatch requests to an appropriate sub, and do the top level validity checking
5704: # as well:
5705: # - Is the keyword recognized.
5706: # - Is the proper client type attempting the request.
5707: # - Is the request encrypted if it has to be.
5708: # Parameters:
5709: # $request_name - Name of the request being registered.
5710: # This is the command request that will match
5711: # against the hash keywords to lookup the information
5712: # associated with the dispatch information.
5713: # $procedure - Reference to a sub to call to process the request.
5714: # All subs get called as follows:
5715: # Procedure($cmd, $tail, $replyfd, $key)
5716: # $cmd - the actual keyword that invoked us.
5717: # $tail - the tail of the request that invoked us.
5718: # $replyfd- File descriptor connected to the client
5719: # $must_encode - True if the request must be encoded to be good.
5720: # $client_ok - True if it's ok for a client to request this.
5721: # $manager_ok - True if it's ok for a manager to request this.
5722: # Side effects:
5723: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5724: # - On failure, the program will die as it's a bad internal bug to try to
5725: # register a duplicate command handler.
5726: #
5727: sub register_handler {
5728: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
5729:
5730: # Don't allow duplication#
5731:
5732: if (defined $Dispatcher{$request_name}) {
5733: die "Attempting to define a duplicate request handler for $request_name\n";
5734: }
5735: # Build the client type mask:
5736:
5737: my $client_type_mask = 0;
5738: if($client_ok) {
5739: $client_type_mask |= $CLIENT_OK;
5740: }
5741: if($manager_ok) {
5742: $client_type_mask |= $MANAGER_OK;
5743: }
5744:
5745: # Enter the hash:
5746:
5747: my @entry = ($procedure, $must_encode, $client_type_mask);
5748:
5749: $Dispatcher{$request_name} = \@entry;
5750:
5751: }
5752:
5753:
5754: #------------------------------------------------------------------
5755:
5756:
5757:
5758:
5759: #
5760: # Convert an error return code from lcpasswd to a string value.
5761: #
5762: sub lcpasswdstrerror {
5763: my $ErrorCode = shift;
5764: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
5765: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5766: } else {
5767: return $passwderrors[$ErrorCode];
5768: }
5769: }
5770:
5771: #
5772: # Convert an error return code from lcuseradd to a string value:
5773: #
5774: sub lcuseraddstrerror {
5775: my $ErrorCode = shift;
5776: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
5777: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
5778: } else {
5779: return $adderrors[$ErrorCode];
5780: }
5781: }
5782:
5783: # grabs exception and records it to log before exiting
5784: sub catchexception {
5785: my ($error)=@_;
5786: $SIG{'QUIT'}='DEFAULT';
5787: $SIG{__DIE__}='DEFAULT';
5788: &status("Catching exception");
5789: &logthis("<font color='red'>CRITICAL: "
5790: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
5791: ."a crash with this error msg->[$error]</font>");
5792: &logthis('Famous last words: '.$status.' - '.$lastlog);
5793: if ($client) { print $client "error: $error\n"; }
5794: $server->close();
5795: die($error);
5796: }
5797: sub timeout {
5798: &status("Handling Timeout");
5799: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
5800: &catchexception('Timeout');
5801: }
5802: # -------------------------------- Set signal handlers to record abnormal exits
5803:
5804:
5805: $SIG{'QUIT'}=\&catchexception;
5806: $SIG{__DIE__}=\&catchexception;
5807:
5808: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
5809: &status("Read loncapa.conf and loncapa_apache.conf");
5810: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
5811: %perlvar=%{$perlvarref};
5812: undef $perlvarref;
5813:
5814: # ----------------------------- Make sure this process is running from user=www
5815: my $wwwid=getpwnam('www');
5816: if ($wwwid!=$<) {
5817: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5818: my $subj="LON: $currenthostid User ID mismatch";
5819: system("echo 'User ID mismatch. lond must be run as user www.' |\
5820: mailto $emailto -s '$subj' > /dev/null");
5821: exit 1;
5822: }
5823:
5824: # --------------------------------------------- Check if other instance running
5825:
5826: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
5827:
5828: if (-e $pidfile) {
5829: my $lfh=IO::File->new("$pidfile");
5830: my $pide=<$lfh>;
5831: chomp($pide);
5832: if (kill 0 => $pide) { die "already running"; }
5833: }
5834:
5835: # ------------------------------------------------------------- Read hosts file
5836:
5837:
5838:
5839: # establish SERVER socket, bind and listen.
5840: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
5841: Type => SOCK_STREAM,
5842: Proto => 'tcp',
5843: Reuse => 1,
5844: Listen => 10 )
5845: or die "making socket: $@\n";
5846:
5847: # --------------------------------------------------------- Do global variables
5848:
5849: # global variables
5850:
5851: my %children = (); # keys are current child process IDs
5852:
5853: sub REAPER { # takes care of dead children
5854: $SIG{CHLD} = \&REAPER;
5855: &status("Handling child death");
5856: my $pid;
5857: do {
5858: $pid = waitpid(-1,&WNOHANG());
5859: if (defined($children{$pid})) {
5860: &logthis("Child $pid died");
5861: delete($children{$pid});
5862: } elsif ($pid > 0) {
5863: &logthis("Unknown Child $pid died");
5864: }
5865: } while ( $pid > 0 );
5866: foreach my $child (keys(%children)) {
5867: $pid = waitpid($child,&WNOHANG());
5868: if ($pid > 0) {
5869: &logthis("Child $child - $pid looks like we missed it's death");
5870: delete($children{$pid});
5871: }
5872: }
5873: &status("Finished Handling child death");
5874: }
5875:
5876: sub HUNTSMAN { # signal handler for SIGINT
5877: &status("Killing children (INT)");
5878: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5879: kill 'INT' => keys %children;
5880: &logthis("Free socket: ".shutdown($server,2)); # free up socket
5881: my $execdir=$perlvar{'lonDaemons'};
5882: unlink("$execdir/logs/lond.pid");
5883: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
5884: &status("Done killing children");
5885: exit; # clean up with dignity
5886: }
5887:
5888: sub HUPSMAN { # signal handler for SIGHUP
5889: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5890: &status("Killing children for restart (HUP)");
5891: kill 'INT' => keys %children;
5892: &logthis("Free socket: ".shutdown($server,2)); # free up socket
5893: &logthis("<font color='red'>CRITICAL: Restarting</font>");
5894: my $execdir=$perlvar{'lonDaemons'};
5895: unlink("$execdir/logs/lond.pid");
5896: &status("Restarting self (HUP)");
5897: exec("$execdir/lond"); # here we go again
5898: }
5899:
5900: #
5901: # Reload the Apache daemon's state.
5902: # This is done by invoking /home/httpd/perl/apachereload
5903: # a setuid perl script that can be root for us to do this job.
5904: #
5905: sub ReloadApache {
5906: my $execdir = $perlvar{'lonDaemons'};
5907: my $script = $execdir."/apachereload";
5908: system($script);
5909: }
5910:
5911: #
5912: # Called in response to a USR2 signal.
5913: # - Reread hosts.tab
5914: # - All children connected to hosts that were removed from hosts.tab
5915: # are killed via SIGINT
5916: # - All children connected to previously existing hosts are sent SIGUSR1
5917: # - Our internal hosts hash is updated to reflect the new contents of
5918: # hosts.tab causing connections from hosts added to hosts.tab to
5919: # now be honored.
5920: #
5921: sub UpdateHosts {
5922: &status("Reload hosts.tab");
5923: logthis('<font color="blue"> Updating connections </font>');
5924: #
5925: # The %children hash has the set of IP's we currently have children
5926: # on. These need to be matched against records in the hosts.tab
5927: # Any ip's no longer in the table get killed off they correspond to
5928: # either dropped or changed hosts. Note that the re-read of the table
5929: # will take care of new and changed hosts as connections come into being.
5930:
5931: &Apache::lonnet::reset_hosts_info();
5932:
5933: foreach my $child (keys(%children)) {
5934: my $childip = $children{$child};
5935: if ($childip ne '127.0.0.1'
5936: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
5937: logthis('<font color="blue"> UpdateHosts killing child '
5938: ." $child for ip $childip </font>");
5939: kill('INT', $child);
5940: } else {
5941: logthis('<font color="green"> keeping child for ip '
5942: ." $childip (pid=$child) </font>");
5943: }
5944: }
5945: ReloadApache;
5946: &status("Finished reloading hosts.tab");
5947: }
5948:
5949:
5950: sub checkchildren {
5951: &status("Checking on the children (sending signals)");
5952: &initnewstatus();
5953: &logstatus();
5954: &logthis('Going to check on the children');
5955: my $docdir=$perlvar{'lonDocRoot'};
5956: foreach (sort keys %children) {
5957: #sleep 1;
5958: unless (kill 'USR1' => $_) {
5959: &logthis ('Child '.$_.' is dead');
5960: &logstatus($$.' is dead');
5961: delete($children{$_});
5962: }
5963: }
5964: sleep 5;
5965: $SIG{ALRM} = sub { Debug("timeout");
5966: die "timeout"; };
5967: $SIG{__DIE__} = 'DEFAULT';
5968: &status("Checking on the children (waiting for reports)");
5969: foreach (sort keys %children) {
5970: unless (-e "$docdir/lon-status/londchld/$_.txt") {
5971: eval {
5972: alarm(300);
5973: &logthis('Child '.$_.' did not respond');
5974: kill 9 => $_;
5975: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5976: #$subj="LON: $currenthostid killed lond process $_";
5977: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
5978: #$execdir=$perlvar{'lonDaemons'};
5979: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
5980: delete($children{$_});
5981: alarm(0);
5982: }
5983: }
5984: }
5985: $SIG{ALRM} = 'DEFAULT';
5986: $SIG{__DIE__} = \&catchexception;
5987: &status("Finished checking children");
5988: &logthis('Finished Checking children');
5989: }
5990:
5991: # --------------------------------------------------------------------- Logging
5992:
5993: sub logthis {
5994: my $message=shift;
5995: my $execdir=$perlvar{'lonDaemons'};
5996: my $fh=IO::File->new(">>$execdir/logs/lond.log");
5997: my $now=time;
5998: my $local=localtime($now);
5999: $lastlog=$local.': '.$message;
6000: print $fh "$local ($$): $message\n";
6001: }
6002:
6003: # ------------------------- Conditional log if $DEBUG true.
6004: sub Debug {
6005: my $message = shift;
6006: if($DEBUG) {
6007: &logthis($message);
6008: }
6009: }
6010:
6011: #
6012: # Sub to do replies to client.. this gives a hook for some
6013: # debug tracing too:
6014: # Parameters:
6015: # fd - File open on client.
6016: # reply - Text to send to client.
6017: # request - Original request from client.
6018: #
6019: sub Reply {
6020: my ($fd, $reply, $request) = @_;
6021: if (ref($reply)) {
6022: print $fd $$reply;
6023: print $fd "\n";
6024: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6025: } else {
6026: print $fd $reply;
6027: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6028: }
6029: $Transactions++;
6030: }
6031:
6032:
6033: #
6034: # Sub to report a failure.
6035: # This function:
6036: # - Increments the failure statistic counters.
6037: # - Invokes Reply to send the error message to the client.
6038: # Parameters:
6039: # fd - File descriptor open on the client
6040: # reply - Reply text to emit.
6041: # request - The original request message (used by Reply
6042: # to debug if that's enabled.
6043: # Implicit outputs:
6044: # $Failures- The number of failures is incremented.
6045: # Reply (invoked here) sends a message to the
6046: # client:
6047: #
6048: sub Failure {
6049: my $fd = shift;
6050: my $reply = shift;
6051: my $request = shift;
6052:
6053: $Failures++;
6054: Reply($fd, $reply, $request); # That's simple eh?
6055: }
6056: # ------------------------------------------------------------------ Log status
6057:
6058: sub logstatus {
6059: &status("Doing logging");
6060: my $docdir=$perlvar{'lonDocRoot'};
6061: {
6062: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6063: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6064: $fh->close();
6065: }
6066: &status("Finished $$.txt");
6067: {
6068: open(LOG,">>$docdir/lon-status/londstatus.txt");
6069: flock(LOG,LOCK_EX);
6070: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6071: .$status."\t".$lastlog."\t $keymode\n";
6072: flock(LOG,LOCK_UN);
6073: close(LOG);
6074: }
6075: &status("Finished logging");
6076: }
6077:
6078: sub initnewstatus {
6079: my $docdir=$perlvar{'lonDocRoot'};
6080: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6081: my $now=time;
6082: my $local=localtime($now);
6083: print $fh "LOND status $local - parent $$\n\n";
6084: opendir(DIR,"$docdir/lon-status/londchld");
6085: while (my $filename=readdir(DIR)) {
6086: unlink("$docdir/lon-status/londchld/$filename");
6087: }
6088: closedir(DIR);
6089: }
6090:
6091: # -------------------------------------------------------------- Status setting
6092:
6093: sub status {
6094: my $what=shift;
6095: my $now=time;
6096: my $local=localtime($now);
6097: $status=$local.': '.$what;
6098: $0='lond: '.$what.' '.$local;
6099: }
6100:
6101: # -------------------------------------------------------------- Talk to lonsql
6102:
6103: sub sql_reply {
6104: my ($cmd)=@_;
6105: my $answer=&sub_sql_reply($cmd);
6106: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6107: return $answer;
6108: }
6109:
6110: sub sub_sql_reply {
6111: my ($cmd)=@_;
6112: my $unixsock="mysqlsock";
6113: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6114: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6115: Type => SOCK_STREAM,
6116: Timeout => 10)
6117: or return "con_lost";
6118: print $sclient "$cmd:$currentdomainid\n";
6119: my $answer=<$sclient>;
6120: chomp($answer);
6121: if (!$answer) { $answer="con_lost"; }
6122: return $answer;
6123: }
6124:
6125: # --------------------------------------- Is this the home server of an author?
6126:
6127: sub ishome {
6128: my $author=shift;
6129: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6130: my ($udom,$uname)=split(/\//,$author);
6131: my $proname=propath($udom,$uname);
6132: if (-e $proname) {
6133: return 'owner';
6134: } else {
6135: return 'not_owner';
6136: }
6137: }
6138:
6139: # ======================================================= Continue main program
6140: # ---------------------------------------------------- Fork once and dissociate
6141:
6142: my $fpid=fork;
6143: exit if $fpid;
6144: die "Couldn't fork: $!" unless defined ($fpid);
6145:
6146: POSIX::setsid() or die "Can't start new session: $!";
6147:
6148: # ------------------------------------------------------- Write our PID on disk
6149:
6150: my $execdir=$perlvar{'lonDaemons'};
6151: open (PIDSAVE,">$execdir/logs/lond.pid");
6152: print PIDSAVE "$$\n";
6153: close(PIDSAVE);
6154: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
6155: &status('Starting');
6156:
6157:
6158:
6159: # ----------------------------------------------------- Install signal handlers
6160:
6161:
6162: $SIG{CHLD} = \&REAPER;
6163: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6164: $SIG{HUP} = \&HUPSMAN;
6165: $SIG{USR1} = \&checkchildren;
6166: $SIG{USR2} = \&UpdateHosts;
6167:
6168: # Read the host hashes:
6169: &Apache::lonnet::load_hosts_tab();
6170:
6171: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
6172:
6173: # --------------------------------------------------------------
6174: # Accept connections. When a connection comes in, it is validated
6175: # and if good, a child process is created to process transactions
6176: # along the connection.
6177:
6178: while (1) {
6179: &status('Starting accept');
6180: $client = $server->accept() or next;
6181: &status('Accepted '.$client.' off to spawn');
6182: make_new_child($client);
6183: &status('Finished spawning');
6184: }
6185:
6186: sub make_new_child {
6187: my $pid;
6188: # my $cipher; # Now global
6189: my $sigset;
6190:
6191: $client = shift;
6192: &status('Starting new child '.$client);
6193: &logthis('<font color="green"> Attempting to start child ('.$client.
6194: ")</font>");
6195: # block signal for fork
6196: $sigset = POSIX::SigSet->new(SIGINT);
6197: sigprocmask(SIG_BLOCK, $sigset)
6198: or die "Can't block SIGINT for fork: $!\n";
6199:
6200: die "fork: $!" unless defined ($pid = fork);
6201:
6202: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6203: # connection liveness.
6204:
6205: #
6206: # Figure out who we're talking to so we can record the peer in
6207: # the pid hash.
6208: #
6209: my $caller = getpeername($client);
6210: my ($port,$iaddr);
6211: if (defined($caller) && length($caller) > 0) {
6212: ($port,$iaddr)=unpack_sockaddr_in($caller);
6213: } else {
6214: &logthis("Unable to determine who caller was, getpeername returned nothing");
6215: }
6216: if (defined($iaddr)) {
6217: $clientip = inet_ntoa($iaddr);
6218: Debug("Connected with $clientip");
6219: } else {
6220: &logthis("Unable to determine clientip");
6221: $clientip='Unavailable';
6222: }
6223:
6224: if ($pid) {
6225: # Parent records the child's birth and returns.
6226: sigprocmask(SIG_UNBLOCK, $sigset)
6227: or die "Can't unblock SIGINT for fork: $!\n";
6228: $children{$pid} = $clientip;
6229: &status('Started child '.$pid);
6230: return;
6231: } else {
6232: # Child can *not* return from this subroutine.
6233: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
6234: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
6235: #don't get intercepted
6236: $SIG{USR1}= \&logstatus;
6237: $SIG{ALRM}= \&timeout;
6238: $lastlog='Forked ';
6239: $status='Forked';
6240:
6241: # unblock signals
6242: sigprocmask(SIG_UNBLOCK, $sigset)
6243: or die "Can't unblock SIGINT for fork: $!\n";
6244:
6245: # my $tmpsnum=0; # Now global
6246: #---------------------------------------------------- kerberos 5 initialization
6247: &Authen::Krb5::init_context();
6248: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
6249: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
6250: &Authen::Krb5::init_ets();
6251: }
6252:
6253: &status('Accepted connection');
6254: # =============================================================================
6255: # do something with the connection
6256: # -----------------------------------------------------------------------------
6257: # see if we know client and 'check' for spoof IP by ineffective challenge
6258:
6259: my $outsideip=$clientip;
6260: if ($clientip eq '127.0.0.1') {
6261: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
6262: }
6263: &ReadManagerTable();
6264: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
6265: my $ismanager=($managers{$outsideip} ne undef);
6266: $clientname = "[unknonwn]";
6267: if($clientrec) { # Establish client type.
6268: $ConnectionType = "client";
6269: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
6270: if($ismanager) {
6271: $ConnectionType = "both";
6272: }
6273: } else {
6274: $ConnectionType = "manager";
6275: $clientname = $managers{$outsideip};
6276: }
6277: my $clientok;
6278:
6279: if ($clientrec || $ismanager) {
6280: &status("Waiting for init from $clientip $clientname");
6281: &logthis('<font color="yellow">INFO: Connection, '.
6282: $clientip.
6283: " ($clientname) connection type = $ConnectionType </font>" );
6284: &status("Connecting $clientip ($clientname))");
6285: my $remotereq=<$client>;
6286: chomp($remotereq);
6287: Debug("Got init: $remotereq");
6288:
6289: if ($remotereq =~ /^init/) {
6290: &sethost("sethost:$perlvar{'lonHostID'}");
6291: #
6292: # If the remote is attempting a local init... give that a try:
6293: #
6294: my ($i, $inittype) = split(/:/, $remotereq);
6295:
6296: # If the connection type is ssl, but I didn't get my
6297: # certificate files yet, then I'll drop back to
6298: # insecure (if allowed).
6299:
6300: if($inittype eq "ssl") {
6301: my ($ca, $cert) = lonssl::CertificateFile;
6302: my $kfile = lonssl::KeyFile;
6303: if((!$ca) ||
6304: (!$cert) ||
6305: (!$kfile)) {
6306: $inittype = ""; # This forces insecure attempt.
6307: &logthis("<font color=\"blue\"> Certificates not "
6308: ."installed -- trying insecure auth</font>");
6309: } else { # SSL certificates are in place so
6310: } # Leave the inittype alone.
6311: }
6312:
6313: if($inittype eq "local") {
6314: my $key = LocalConnection($client, $remotereq);
6315: if($key) {
6316: Debug("Got local key $key");
6317: $clientok = 1;
6318: my $cipherkey = pack("H32", $key);
6319: $cipher = new IDEA($cipherkey);
6320: print $client "ok:local\n";
6321: &logthis('<font color="green"'
6322: . "Successful local authentication </font>");
6323: $keymode = "local"
6324: } else {
6325: Debug("Failed to get local key");
6326: $clientok = 0;
6327: shutdown($client, 3);
6328: close $client;
6329: }
6330: } elsif ($inittype eq "ssl") {
6331: my $key = SSLConnection($client);
6332: if ($key) {
6333: $clientok = 1;
6334: my $cipherkey = pack("H32", $key);
6335: $cipher = new IDEA($cipherkey);
6336: &logthis('<font color="green">'
6337: ."Successfull ssl authentication with $clientname </font>");
6338: $keymode = "ssl";
6339:
6340: } else {
6341: $clientok = 0;
6342: close $client;
6343: }
6344:
6345: } else {
6346: my $ok = InsecureConnection($client);
6347: if($ok) {
6348: $clientok = 1;
6349: &logthis('<font color="green">'
6350: ."Successful insecure authentication with $clientname </font>");
6351: print $client "ok\n";
6352: $keymode = "insecure";
6353: } else {
6354: &logthis('<font color="yellow">'
6355: ."Attempted insecure connection disallowed </font>");
6356: close $client;
6357: $clientok = 0;
6358:
6359: }
6360: }
6361: } else {
6362: &logthis(
6363: "<font color='blue'>WARNING: "
6364: ."$clientip failed to initialize: >$remotereq< </font>");
6365: &status('No init '.$clientip);
6366: }
6367:
6368: } else {
6369: &logthis(
6370: "<font color='blue'>WARNING: Unknown client $clientip</font>");
6371: &status('Hung up on '.$clientip);
6372: }
6373:
6374: if ($clientok) {
6375: # ---------------- New known client connecting, could mean machine online again
6376: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
6377: && $clientip ne '127.0.0.1') {
6378: &Apache::lonnet::reconlonc($clientname);
6379: }
6380: &logthis("<font color='green'>Established connection: $clientname</font>");
6381: &status('Will listen to '.$clientname);
6382: # ------------------------------------------------------------ Process requests
6383: my $keep_going = 1;
6384: my $user_input;
6385: while(($user_input = get_request) && $keep_going) {
6386: alarm(120);
6387: Debug("Main: Got $user_input\n");
6388: $keep_going = &process_request($user_input);
6389: alarm(0);
6390: &status('Listening to '.$clientname." ($keymode)");
6391: }
6392:
6393: # --------------------------------------------- client unknown or fishy, refuse
6394: } else {
6395: print $client "refused\n";
6396: $client->close();
6397: &logthis("<font color='blue'>WARNING: "
6398: ."Rejected client $clientip, closing connection</font>");
6399: }
6400: }
6401:
6402: # =============================================================================
6403:
6404: &logthis("<font color='red'>CRITICAL: "
6405: ."Disconnect from $clientip ($clientname)</font>");
6406:
6407:
6408: # this exit is VERY important, otherwise the child will become
6409: # a producer of more and more children, forking yourself into
6410: # process death.
6411: exit;
6412:
6413: }
6414: #
6415: # Determine if a user is an author for the indicated domain.
6416: #
6417: # Parameters:
6418: # domain - domain to check in .
6419: # user - Name of user to check.
6420: #
6421: # Return:
6422: # 1 - User is an author for domain.
6423: # 0 - User is not an author for domain.
6424: sub is_author {
6425: my ($domain, $user) = @_;
6426:
6427: &Debug("is_author: $user @ $domain");
6428:
6429: my $hashref = &tie_user_hash($domain, $user, "roles",
6430: &GDBM_READER());
6431:
6432: # Author role should show up as a key /domain/_au
6433:
6434: my $key = "/$domain/_au";
6435: my $value;
6436: if (defined($hashref)) {
6437: $value = $hashref->{$key};
6438: }
6439:
6440: if(defined($value)) {
6441: &Debug("$user @ $domain is an author");
6442: }
6443:
6444: return defined($value);
6445: }
6446: #
6447: # Checks to see if the input roleput request was to set
6448: # an author role. If so, invokes the lchtmldir script to set
6449: # up a correct public_html
6450: # Parameters:
6451: # request - The request sent to the rolesput subchunk.
6452: # We're looking for /domain/_au
6453: # domain - The domain in which the user is having roles doctored.
6454: # user - Name of the user for which the role is being put.
6455: # authtype - The authentication type associated with the user.
6456: #
6457: sub manage_permissions {
6458: my ($request, $domain, $user, $authtype) = @_;
6459:
6460: &Debug("manage_permissions: $request $domain $user $authtype");
6461:
6462: # See if the request is of the form /$domain/_au
6463: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
6464: my $execdir = $perlvar{'lonDaemons'};
6465: my $userhome= "/home/$user" ;
6466: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
6467: &Debug("Setting homedir permissions for $userhome");
6468: system("$execdir/lchtmldir $userhome $user $authtype");
6469: }
6470: }
6471:
6472:
6473: #
6474: # Return the full path of a user password file, whether it exists or not.
6475: # Parameters:
6476: # domain - Domain in which the password file lives.
6477: # user - name of the user.
6478: # Returns:
6479: # Full passwd path:
6480: #
6481: sub password_path {
6482: my ($domain, $user) = @_;
6483: return &propath($domain, $user).'/passwd';
6484: }
6485:
6486: # Password Filename
6487: # Returns the path to a passwd file given domain and user... only if
6488: # it exists.
6489: # Parameters:
6490: # domain - Domain in which to search.
6491: # user - username.
6492: # Returns:
6493: # - If the password file exists returns its path.
6494: # - If the password file does not exist, returns undefined.
6495: #
6496: sub password_filename {
6497: my ($domain, $user) = @_;
6498:
6499: Debug ("PasswordFilename called: dom = $domain user = $user");
6500:
6501: my $path = &password_path($domain, $user);
6502: Debug("PasswordFilename got path: $path");
6503: if(-e $path) {
6504: return $path;
6505: } else {
6506: return undef;
6507: }
6508: }
6509:
6510: #
6511: # Rewrite the contents of the user's passwd file.
6512: # Parameters:
6513: # domain - domain of the user.
6514: # name - User's name.
6515: # contents - New contents of the file.
6516: # Returns:
6517: # 0 - Failed.
6518: # 1 - Success.
6519: #
6520: sub rewrite_password_file {
6521: my ($domain, $user, $contents) = @_;
6522:
6523: my $file = &password_filename($domain, $user);
6524: if (defined $file) {
6525: my $pf = IO::File->new(">$file");
6526: if($pf) {
6527: print $pf "$contents\n";
6528: return 1;
6529: } else {
6530: return 0;
6531: }
6532: } else {
6533: return 0;
6534: }
6535:
6536: }
6537:
6538: #
6539: # get_auth_type - Determines the authorization type of a user in a domain.
6540:
6541: # Returns the authorization type or nouser if there is no such user.
6542: #
6543: sub get_auth_type
6544: {
6545:
6546: my ($domain, $user) = @_;
6547:
6548: Debug("get_auth_type( $domain, $user ) \n");
6549: my $proname = &propath($domain, $user);
6550: my $passwdfile = "$proname/passwd";
6551: if( -e $passwdfile ) {
6552: my $pf = IO::File->new($passwdfile);
6553: my $realpassword = <$pf>;
6554: chomp($realpassword);
6555: Debug("Password info = $realpassword\n");
6556: my ($authtype, $contentpwd) = split(/:/, $realpassword);
6557: Debug("Authtype = $authtype, content = $contentpwd\n");
6558: return "$authtype:$contentpwd";
6559: } else {
6560: Debug("Returning nouser");
6561: return "nouser";
6562: }
6563: }
6564:
6565: #
6566: # Validate a user given their domain, name and password. This utility
6567: # function is used by both AuthenticateHandler and ChangePasswordHandler
6568: # to validate the login credentials of a user.
6569: # Parameters:
6570: # $domain - The domain being logged into (this is required due to
6571: # the capability for multihomed systems.
6572: # $user - The name of the user being validated.
6573: # $password - The user's propoposed password.
6574: #
6575: # Returns:
6576: # 1 - The domain,user,pasword triplet corresponds to a valid
6577: # user.
6578: # 0 - The domain,user,password triplet is not a valid user.
6579: #
6580: sub validate_user {
6581: my ($domain, $user, $password, $checkdefauth) = @_;
6582:
6583: # Why negative ~pi you may well ask? Well this function is about
6584: # authentication, and therefore very important to get right.
6585: # I've initialized the flag that determines whether or not I've
6586: # validated correctly to a value it's not supposed to get.
6587: # At the end of this function. I'll ensure that it's not still that
6588: # value so we don't just wind up returning some accidental value
6589: # as a result of executing an unforseen code path that
6590: # did not set $validated. At the end of valid execution paths,
6591: # validated shoule be 1 for success or 0 for failuer.
6592:
6593: my $validated = -3.14159;
6594:
6595: # How we authenticate is determined by the type of authentication
6596: # the user has been assigned. If the authentication type is
6597: # "nouser", the user does not exist so we will return 0.
6598:
6599: my $contents = &get_auth_type($domain, $user);
6600: my ($howpwd, $contentpwd) = split(/:/, $contents);
6601:
6602: my $null = pack("C",0); # Used by kerberos auth types.
6603:
6604: if ($howpwd eq 'nouser') {
6605: if ($checkdefauth) {
6606: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
6607: if ($domdefaults{'auth_def'} eq 'localauth') {
6608: $howpwd = $domdefaults{'auth_def'};
6609: $contentpwd = $domdefaults{'auth_arg_def'};
6610: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
6611: ($domdefaults{'auth_def'} eq 'krb5')) &&
6612: ($domdefaults{'auth_arg_def'} ne '')) {
6613: $howpwd = $domdefaults{'auth_def'};
6614: $contentpwd = $domdefaults{'auth_arg_def'};
6615: }
6616: }
6617: }
6618: if ($howpwd ne 'nouser') {
6619: if($howpwd eq "internal") { # Encrypted is in local password file.
6620: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6621: }
6622: elsif ($howpwd eq "unix") { # User is a normal unix user.
6623: $contentpwd = (getpwnam($user))[1];
6624: if($contentpwd) {
6625: if($contentpwd eq 'x') { # Shadow password file...
6626: my $pwauth_path = "/usr/local/sbin/pwauth";
6627: open PWAUTH, "|$pwauth_path" or
6628: die "Cannot invoke authentication";
6629: print PWAUTH "$user\n$password\n";
6630: close PWAUTH;
6631: $validated = ! $?;
6632:
6633: } else { # Passwords in /etc/passwd.
6634: $validated = (crypt($password,
6635: $contentpwd) eq $contentpwd);
6636: }
6637: } else {
6638: $validated = 0;
6639: }
6640: }
6641: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6642: if(! ($password =~ /$null/) ) {
6643: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6644: "",
6645: $contentpwd,,
6646: 'krbtgt',
6647: $contentpwd,
6648: 1,
6649: $password);
6650: if(!$k4error) {
6651: $validated = 1;
6652: } else {
6653: $validated = 0;
6654: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6655: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6656: }
6657: } else {
6658: $validated = 0; # Password has a match with null.
6659: }
6660: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
6661: if(!($password =~ /$null/)) { # Null password not allowed.
6662: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6663: .$contentpwd);
6664: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6665: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6666: my $credentials= &Authen::Krb5::cc_default();
6667: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6668: .$contentpwd));
6669: my $krbreturn;
6670: if (exists(&Authen::Krb5::get_init_creds_password)) {
6671: $krbreturn =
6672: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6673: $krbservice);
6674: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6675: } else {
6676: $krbreturn =
6677: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6678: $password,$credentials);
6679: $validated = ($krbreturn == 1);
6680: }
6681: if (!$validated) {
6682: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6683: &Authen::Krb5::error());
6684: }
6685: } else {
6686: $validated = 0;
6687: }
6688: } elsif ($howpwd eq "localauth") {
6689: # Authenticate via installation specific authentcation method:
6690: $validated = &localauth::localauth($user,
6691: $password,
6692: $contentpwd,
6693: $domain);
6694: if ($validated < 0) {
6695: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6696: $validated = 0;
6697: }
6698: } else { # Unrecognized auth is also bad.
6699: $validated = 0;
6700: }
6701: } else {
6702: $validated = 0;
6703: }
6704: #
6705: # $validated has the correct stat of the authentication:
6706: #
6707:
6708: unless ($validated != -3.14159) {
6709: # I >really really< want to know if this happens.
6710: # since it indicates that user authentication is badly
6711: # broken in some code path.
6712: #
6713: die "ValidateUser - failed to set the value of validated $domain, $user $password";
6714: }
6715: return $validated;
6716: }
6717:
6718:
6719: sub addline {
6720: my ($fname,$hostid,$ip,$newline)=@_;
6721: my $contents;
6722: my $found=0;
6723: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
6724: my $sh;
6725: if ($sh=IO::File->new("$fname.subscription")) {
6726: while (my $subline=<$sh>) {
6727: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
6728: }
6729: $sh->close();
6730: }
6731: $sh=IO::File->new(">$fname.subscription");
6732: if ($contents) { print $sh $contents; }
6733: if ($newline) { print $sh $newline; }
6734: $sh->close();
6735: return $found;
6736: }
6737:
6738: sub get_chat {
6739: my ($cdom,$cname,$udom,$uname,$group)=@_;
6740:
6741: my @entries=();
6742: my $namespace = 'nohist_chatroom';
6743: my $namespace_inroom = 'nohist_inchatroom';
6744: if ($group ne '') {
6745: $namespace .= '_'.$group;
6746: $namespace_inroom .= '_'.$group;
6747: }
6748: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6749: &GDBM_READER());
6750: if ($hashref) {
6751: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6752: &untie_user_hash($hashref);
6753: }
6754: my @participants=();
6755: my $cutoff=time-60;
6756: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
6757: &GDBM_WRCREAT());
6758: if ($hashref) {
6759: $hashref->{$uname.':'.$udom}=time;
6760: foreach my $user (sort(keys(%$hashref))) {
6761: if ($hashref->{$user}>$cutoff) {
6762: push(@participants, 'active_participant:'.$user);
6763: }
6764: }
6765: &untie_user_hash($hashref);
6766: }
6767: return (@participants,@entries);
6768: }
6769:
6770: sub chat_add {
6771: my ($cdom,$cname,$newchat,$group)=@_;
6772: my @entries=();
6773: my $time=time;
6774: my $namespace = 'nohist_chatroom';
6775: my $logfile = 'chatroom.log';
6776: if ($group ne '') {
6777: $namespace .= '_'.$group;
6778: $logfile = 'chatroom_'.$group.'.log';
6779: }
6780: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6781: &GDBM_WRCREAT());
6782: if ($hashref) {
6783: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6784: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
6785: my ($thentime,$idnum)=split(/\_/,$lastid);
6786: my $newid=$time.'_000000';
6787: if ($thentime==$time) {
6788: $idnum=~s/^0+//;
6789: $idnum++;
6790: $idnum=substr('000000'.$idnum,-6,6);
6791: $newid=$time.'_'.$idnum;
6792: }
6793: $hashref->{$newid}=$newchat;
6794: my $expired=$time-3600;
6795: foreach my $comment (keys(%$hashref)) {
6796: my ($thistime) = ($comment=~/(\d+)\_/);
6797: if ($thistime<$expired) {
6798: delete $hashref->{$comment};
6799: }
6800: }
6801: {
6802: my $proname=&propath($cdom,$cname);
6803: if (open(CHATLOG,">>$proname/$logfile")) {
6804: print CHATLOG ("$time:".&unescape($newchat)."\n");
6805: }
6806: close(CHATLOG);
6807: }
6808: &untie_user_hash($hashref);
6809: }
6810: }
6811:
6812: sub unsub {
6813: my ($fname,$clientip)=@_;
6814: my $result;
6815: my $unsubs = 0; # Number of successful unsubscribes:
6816:
6817:
6818: # An old way subscriptions were handled was to have a
6819: # subscription marker file:
6820:
6821: Debug("Attempting unlink of $fname.$clientname");
6822: if (unlink("$fname.$clientname")) {
6823: $unsubs++; # Successful unsub via marker file.
6824: }
6825:
6826: # The more modern way to do it is to have a subscription list
6827: # file:
6828:
6829: if (-e "$fname.subscription") {
6830: my $found=&addline($fname,$clientname,$clientip,'');
6831: if ($found) {
6832: $unsubs++;
6833: }
6834: }
6835:
6836: # If either or both of these mechanisms succeeded in unsubscribing a
6837: # resource we can return ok:
6838:
6839: if($unsubs) {
6840: $result = "ok\n";
6841: } else {
6842: $result = "not_subscribed\n";
6843: }
6844:
6845: return $result;
6846: }
6847:
6848: sub currentversion {
6849: my $fname=shift;
6850: my $version=-1;
6851: my $ulsdir='';
6852: if ($fname=~/^(.+)\/[^\/]+$/) {
6853: $ulsdir=$1;
6854: }
6855: my ($fnamere1,$fnamere2);
6856: # remove version if already specified
6857: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
6858: # get the bits that go before and after the version number
6859: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
6860: $fnamere1=$1;
6861: $fnamere2='.'.$2;
6862: }
6863: if (-e $fname) { $version=1; }
6864: if (-e $ulsdir) {
6865: if(-d $ulsdir) {
6866: if (opendir(LSDIR,$ulsdir)) {
6867: my $ulsfn;
6868: while ($ulsfn=readdir(LSDIR)) {
6869: # see if this is a regular file (ignore links produced earlier)
6870: my $thisfile=$ulsdir.'/'.$ulsfn;
6871: unless (-l $thisfile) {
6872: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
6873: if ($1>$version) { $version=$1; }
6874: }
6875: }
6876: }
6877: closedir(LSDIR);
6878: $version++;
6879: }
6880: }
6881: }
6882: return $version;
6883: }
6884:
6885: sub thisversion {
6886: my $fname=shift;
6887: my $version=-1;
6888: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
6889: $version=$1;
6890: }
6891: return $version;
6892: }
6893:
6894: sub subscribe {
6895: my ($userinput,$clientip)=@_;
6896: my $result;
6897: my ($cmd,$fname)=split(/:/,$userinput,2);
6898: my $ownership=&ishome($fname);
6899: if ($ownership eq 'owner') {
6900: # explitly asking for the current version?
6901: unless (-e $fname) {
6902: my $currentversion=¤tversion($fname);
6903: if (&thisversion($fname)==$currentversion) {
6904: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
6905: my $root=$1;
6906: my $extension=$2;
6907: symlink($root.'.'.$extension,
6908: $root.'.'.$currentversion.'.'.$extension);
6909: unless ($extension=~/\.meta$/) {
6910: symlink($root.'.'.$extension.'.meta',
6911: $root.'.'.$currentversion.'.'.$extension.'.meta');
6912: }
6913: }
6914: }
6915: }
6916: if (-e $fname) {
6917: if (-d $fname) {
6918: $result="directory\n";
6919: } else {
6920: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
6921: my $now=time;
6922: my $found=&addline($fname,$clientname,$clientip,
6923: "$clientname:$clientip:$now\n");
6924: if ($found) { $result="$fname\n"; }
6925: # if they were subscribed to only meta data, delete that
6926: # subscription, when you subscribe to a file you also get
6927: # the metadata
6928: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
6929: $fname=~s/\/home\/httpd\/html\/res/raw/;
6930: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
6931: $result="$fname\n";
6932: }
6933: } else {
6934: $result="not_found\n";
6935: }
6936: } else {
6937: $result="rejected\n";
6938: }
6939: return $result;
6940: }
6941: # Change the passwd of a unix user. The caller must have
6942: # first verified that the user is a loncapa user.
6943: #
6944: # Parameters:
6945: # user - Unix user name to change.
6946: # pass - New password for the user.
6947: # Returns:
6948: # ok - if success
6949: # other - Some meaningfule error message string.
6950: # NOTE:
6951: # invokes a setuid script to change the passwd.
6952: sub change_unix_password {
6953: my ($user, $pass) = @_;
6954:
6955: &Debug("change_unix_password");
6956: my $execdir=$perlvar{'lonDaemons'};
6957: &Debug("Opening lcpasswd pipeline");
6958: my $pf = IO::File->new("|$execdir/lcpasswd > "
6959: ."$perlvar{'lonDaemons'}"
6960: ."/logs/lcpasswd.log");
6961: print $pf "$user\n$pass\n$pass\n";
6962: close $pf;
6963: my $err = $?;
6964: return ($err < @passwderrors) ? $passwderrors[$err] :
6965: "pwchange_falure - unknown error";
6966:
6967:
6968: }
6969:
6970:
6971: sub make_passwd_file {
6972: my ($uname, $umode,$npass,$passfilename)=@_;
6973: my $result="ok";
6974: if ($umode eq 'krb4' or $umode eq 'krb5') {
6975: {
6976: my $pf = IO::File->new(">$passfilename");
6977: if ($pf) {
6978: print $pf "$umode:$npass\n";
6979: } else {
6980: $result = "pass_file_failed_error";
6981: }
6982: }
6983: } elsif ($umode eq 'internal') {
6984: my $salt=time;
6985: $salt=substr($salt,6,2);
6986: my $ncpass=crypt($npass,$salt);
6987: {
6988: &Debug("Creating internal auth");
6989: my $pf = IO::File->new(">$passfilename");
6990: if($pf) {
6991: print $pf "internal:$ncpass\n";
6992: } else {
6993: $result = "pass_file_failed_error";
6994: }
6995: }
6996: } elsif ($umode eq 'localauth') {
6997: {
6998: my $pf = IO::File->new(">$passfilename");
6999: if($pf) {
7000: print $pf "localauth:$npass\n";
7001: } else {
7002: $result = "pass_file_failed_error";
7003: }
7004: }
7005: } elsif ($umode eq 'unix') {
7006: {
7007: #
7008: # Don't allow the creation of privileged accounts!!! that would
7009: # be real bad!!!
7010: #
7011: my $uid = getpwnam($uname);
7012: if((defined $uid) && ($uid == 0)) {
7013: &logthis(">>>Attempted to create privilged account blocked");
7014: return "no_priv_account_error\n";
7015: }
7016:
7017: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
7018:
7019: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
7020: {
7021: &Debug("Executing external: ".$execpath);
7022: &Debug("user = ".$uname.", Password =". $npass);
7023: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
7024: print $se "$uname\n";
7025: print $se "$npass\n";
7026: print $se "$npass\n";
7027: print $se "$lc_error_file\n"; # Status -> unique file.
7028: }
7029: if (-r $lc_error_file) {
7030: &Debug("Opening error file: $lc_error_file");
7031: my $error = IO::File->new("< $lc_error_file");
7032: my $useraddok = <$error>;
7033: $error->close;
7034: unlink($lc_error_file);
7035:
7036: chomp $useraddok;
7037:
7038: if($useraddok > 0) {
7039: my $error_text = &lcuseraddstrerror($useraddok);
7040: &logthis("Failed lcuseradd: $error_text");
7041: $result = "lcuseradd_failed:$error_text";
7042: } else {
7043: my $pf = IO::File->new(">$passfilename");
7044: if($pf) {
7045: print $pf "unix:\n";
7046: } else {
7047: $result = "pass_file_failed_error";
7048: }
7049: }
7050: } else {
7051: &Debug("Could not locate lcuseradd error: $lc_error_file");
7052: $result="bug_lcuseradd_no_output_file";
7053: }
7054: }
7055: } elsif ($umode eq 'none') {
7056: {
7057: my $pf = IO::File->new("> $passfilename");
7058: if($pf) {
7059: print $pf "none:\n";
7060: } else {
7061: $result = "pass_file_failed_error";
7062: }
7063: }
7064: } else {
7065: $result="auth_mode_error";
7066: }
7067: return $result;
7068: }
7069:
7070: sub convert_photo {
7071: my ($start,$dest)=@_;
7072: system("convert $start $dest");
7073: }
7074:
7075: sub sethost {
7076: my ($remotereq) = @_;
7077: my (undef,$hostid)=split(/:/,$remotereq);
7078: # ignore sethost if we are already correct
7079: if ($hostid eq $currenthostid) {
7080: return 'ok';
7081: }
7082:
7083: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
7084: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7085: eq &Apache::lonnet::get_host_ip($hostid)) {
7086: $currenthostid =$hostid;
7087: $currentdomainid=&Apache::lonnet::host_domain($hostid);
7088: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
7089: } else {
7090: &logthis("Requested host id $hostid not an alias of ".
7091: $perlvar{'lonHostID'}." refusing connection");
7092: return 'unable_to_set';
7093: }
7094: return 'ok';
7095: }
7096:
7097: sub version {
7098: my ($userinput)=@_;
7099: $remoteVERSION=(split(/:/,$userinput))[1];
7100: return "version:$VERSION";
7101: }
7102:
7103:
7104: # ----------------------------------- POD (plain old documentation, CPAN style)
7105:
7106: =head1 NAME
7107:
7108: lond - "LON Daemon" Server (port "LOND" 5663)
7109:
7110: =head1 SYNOPSIS
7111:
7112: Usage: B<lond>
7113:
7114: Should only be run as user=www. This is a command-line script which
7115: is invoked by B<loncron>. There is no expectation that a typical user
7116: will manually start B<lond> from the command-line. (In other words,
7117: DO NOT START B<lond> YOURSELF.)
7118:
7119: =head1 DESCRIPTION
7120:
7121: There are two characteristics associated with the running of B<lond>,
7122: PROCESS MANAGEMENT (starting, stopping, handling child processes)
7123: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
7124: subscriptions, etc). These are described in two large
7125: sections below.
7126:
7127: B<PROCESS MANAGEMENT>
7128:
7129: Preforker - server who forks first. Runs as a daemon. HUPs.
7130: Uses IDEA encryption
7131:
7132: B<lond> forks off children processes that correspond to the other servers
7133: in the network. Management of these processes can be done at the
7134: parent process level or the child process level.
7135:
7136: B<logs/lond.log> is the location of log messages.
7137:
7138: The process management is now explained in terms of linux shell commands,
7139: subroutines internal to this code, and signal assignments:
7140:
7141: =over 4
7142:
7143: =item *
7144:
7145: PID is stored in B<logs/lond.pid>
7146:
7147: This is the process id number of the parent B<lond> process.
7148:
7149: =item *
7150:
7151: SIGTERM and SIGINT
7152:
7153: Parent signal assignment:
7154: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7155:
7156: Child signal assignment:
7157: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
7158: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
7159: to restart a new child.)
7160:
7161: Command-line invocations:
7162: B<kill> B<-s> SIGTERM I<PID>
7163: B<kill> B<-s> SIGINT I<PID>
7164:
7165: Subroutine B<HUNTSMAN>:
7166: This is only invoked for the B<lond> parent I<PID>.
7167: This kills all the children, and then the parent.
7168: The B<lonc.pid> file is cleared.
7169:
7170: =item *
7171:
7172: SIGHUP
7173:
7174: Current bug:
7175: This signal can only be processed the first time
7176: on the parent process. Subsequent SIGHUP signals
7177: have no effect.
7178:
7179: Parent signal assignment:
7180: $SIG{HUP} = \&HUPSMAN;
7181:
7182: Child signal assignment:
7183: none (nothing happens)
7184:
7185: Command-line invocations:
7186: B<kill> B<-s> SIGHUP I<PID>
7187:
7188: Subroutine B<HUPSMAN>:
7189: This is only invoked for the B<lond> parent I<PID>,
7190: This kills all the children, and then the parent.
7191: The B<lond.pid> file is cleared.
7192:
7193: =item *
7194:
7195: SIGUSR1
7196:
7197: Parent signal assignment:
7198: $SIG{USR1} = \&USRMAN;
7199:
7200: Child signal assignment:
7201: $SIG{USR1}= \&logstatus;
7202:
7203: Command-line invocations:
7204: B<kill> B<-s> SIGUSR1 I<PID>
7205:
7206: Subroutine B<USRMAN>:
7207: When invoked for the B<lond> parent I<PID>,
7208: SIGUSR1 is sent to all the children, and the status of
7209: each connection is logged.
7210:
7211: =item *
7212:
7213: SIGUSR2
7214:
7215: Parent Signal assignment:
7216: $SIG{USR2} = \&UpdateHosts
7217:
7218: Child signal assignment:
7219: NONE
7220:
7221:
7222: =item *
7223:
7224: SIGCHLD
7225:
7226: Parent signal assignment:
7227: $SIG{CHLD} = \&REAPER;
7228:
7229: Child signal assignment:
7230: none
7231:
7232: Command-line invocations:
7233: B<kill> B<-s> SIGCHLD I<PID>
7234:
7235: Subroutine B<REAPER>:
7236: This is only invoked for the B<lond> parent I<PID>.
7237: Information pertaining to the child is removed.
7238: The socket port is cleaned up.
7239:
7240: =back
7241:
7242: B<SERVER-SIDE ACTIVITIES>
7243:
7244: Server-side information can be accepted in an encrypted or non-encrypted
7245: method.
7246:
7247: =over 4
7248:
7249: =item ping
7250:
7251: Query a client in the hosts.tab table; "Are you there?"
7252:
7253: =item pong
7254:
7255: Respond to a ping query.
7256:
7257: =item ekey
7258:
7259: Read in encrypted key, make cipher. Respond with a buildkey.
7260:
7261: =item load
7262:
7263: Respond with CPU load based on a computation upon /proc/loadavg.
7264:
7265: =item currentauth
7266:
7267: Reply with current authentication information (only over an
7268: encrypted channel).
7269:
7270: =item auth
7271:
7272: Only over an encrypted channel, reply as to whether a user's
7273: authentication information can be validated.
7274:
7275: =item passwd
7276:
7277: Allow for a password to be set.
7278:
7279: =item makeuser
7280:
7281: Make a user.
7282:
7283: =item passwd
7284:
7285: Allow for authentication mechanism and password to be changed.
7286:
7287: =item home
7288:
7289: Respond to a question "are you the home for a given user?"
7290:
7291: =item update
7292:
7293: Update contents of a subscribed resource.
7294:
7295: =item unsubscribe
7296:
7297: The server is unsubscribing from a resource.
7298:
7299: =item subscribe
7300:
7301: The server is subscribing to a resource.
7302:
7303: =item log
7304:
7305: Place in B<logs/lond.log>
7306:
7307: =item put
7308:
7309: stores hash in namespace
7310:
7311: =item rolesputy
7312:
7313: put a role into a user's environment
7314:
7315: =item get
7316:
7317: returns hash with keys from array
7318: reference filled in from namespace
7319:
7320: =item eget
7321:
7322: returns hash with keys from array
7323: reference filled in from namesp (encrypts the return communication)
7324:
7325: =item rolesget
7326:
7327: get a role from a user's environment
7328:
7329: =item del
7330:
7331: deletes keys out of array from namespace
7332:
7333: =item keys
7334:
7335: returns namespace keys
7336:
7337: =item dump
7338:
7339: dumps the complete (or key matching regexp) namespace into a hash
7340:
7341: =item store
7342:
7343: stores hash permanently
7344: for this url; hashref needs to be given and should be a \%hashname; the
7345: remaining args aren't required and if they aren't passed or are '' they will
7346: be derived from the ENV
7347:
7348: =item restore
7349:
7350: returns a hash for a given url
7351:
7352: =item querysend
7353:
7354: Tells client about the lonsql process that has been launched in response
7355: to a sent query.
7356:
7357: =item queryreply
7358:
7359: Accept information from lonsql and make appropriate storage in temporary
7360: file space.
7361:
7362: =item idput
7363:
7364: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
7365: for each student, defined perhaps by the institutional Registrar.)
7366:
7367: =item idget
7368:
7369: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
7370: for each student, defined perhaps by the institutional Registrar.)
7371:
7372: =item tmpput
7373:
7374: Accept and store information in temporary space.
7375:
7376: =item tmpget
7377:
7378: Send along temporarily stored information.
7379:
7380: =item ls
7381:
7382: List part of a user's directory.
7383:
7384: =item pushtable
7385:
7386: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
7387: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
7388: must be restored manually in case of a problem with the new table file.
7389: pushtable requires that the request be encrypted and validated via
7390: ValidateManager. The form of the command is:
7391: enc:pushtable tablename <tablecontents> \n
7392: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
7393: cleartext newline.
7394:
7395: =item Hanging up (exit or init)
7396:
7397: What to do when a client tells the server that they (the client)
7398: are leaving the network.
7399:
7400: =item unknown command
7401:
7402: If B<lond> is sent an unknown command (not in the list above),
7403: it replys to the client "unknown_cmd".
7404:
7405:
7406: =item UNKNOWN CLIENT
7407:
7408: If the anti-spoofing algorithm cannot verify the client,
7409: the client is rejected (with a "refused" message sent
7410: to the client, and the connection is closed.
7411:
7412: =back
7413:
7414: =head1 PREREQUISITES
7415:
7416: IO::Socket
7417: IO::File
7418: Apache::File
7419: POSIX
7420: Crypt::IDEA
7421: LWP::UserAgent()
7422: GDBM_File
7423: Authen::Krb4
7424: Authen::Krb5
7425:
7426: =head1 COREQUISITES
7427:
7428: =head1 OSNAMES
7429:
7430: linux
7431:
7432: =head1 SCRIPT CATEGORIES
7433:
7434: Server/Process
7435:
7436: =cut
7437:
7438:
7439: =pod
7440:
7441: =head1 LOG MESSAGES
7442:
7443: The messages below can be emitted in the lond log. This log is located
7444: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
7445: to provide coloring if examined from inside a web page. Some do not.
7446: Where color is used, the colors are; Red for sometihhng to get excited
7447: about and to follow up on. Yellow for something to keep an eye on to
7448: be sure it does not get worse, Green,and Blue for informational items.
7449:
7450: In the discussions below, sometimes reference is made to ~httpd
7451: when describing file locations. There isn't really an httpd
7452: user, however there is an httpd directory that gets installed in the
7453: place that user home directories go. On linux, this is usually
7454: (always?) /home/httpd.
7455:
7456:
7457: Some messages are colorless. These are usually (not always)
7458: Green/Blue color level messages.
7459:
7460: =over 2
7461:
7462: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
7463:
7464: A local connection negotiation was attempted by
7465: a host whose IP address was not 127.0.0.1.
7466: The socket is closed and the child will exit.
7467: lond has three ways to establish an encyrption
7468: key with a client:
7469:
7470: =over 2
7471:
7472: =item local
7473:
7474: The key is written and read from a file.
7475: This is only valid for connections from localhost.
7476:
7477: =item insecure
7478:
7479: The key is generated by the server and
7480: transmitted to the client.
7481:
7482: =item ssl (secure)
7483:
7484: An ssl connection is negotiated with the client,
7485: the key is generated by the server and sent to the
7486: client across this ssl connection before the
7487: ssl connectionis terminated and clear text
7488: transmission resumes.
7489:
7490: =back
7491:
7492: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
7493:
7494: The client is local but has not sent an initialization
7495: string that is the literal "init:local" The connection
7496: is closed and the child exits.
7497:
7498: =item Red CRITICAL Can't get key file <error>
7499:
7500: SSL key negotiation is being attempted but the call to
7501: lonssl::KeyFile failed. This usually means that the
7502: configuration file is not correctly defining or protecting
7503: the directories/files lonCertificateDirectory or
7504: lonnetPrivateKey
7505: <error> is a string that describes the reason that
7506: the key file could not be located.
7507:
7508: =item (Red) CRITICAL Can't get certificates <error>
7509:
7510: SSL key negotiation failed because we were not able to retrives our certificate
7511: or the CA's certificate in the call to lonssl::CertificateFile
7512: <error> is the textual reason this failed. Usual reasons:
7513:
7514: =over 2
7515:
7516: =item Apache config file for loncapa incorrect:
7517:
7518: one of the variables
7519: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
7520: undefined or incorrect
7521:
7522: =item Permission error:
7523:
7524: The directory pointed to by lonCertificateDirectory is not readable by lond
7525:
7526: =item Permission error:
7527:
7528: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
7529:
7530: =item Installation error:
7531:
7532: Either the certificate authority file or the certificate have not
7533: been installed in lonCertificateDirectory.
7534:
7535: =item (Red) CRITICAL SSL Socket promotion failed: <err>
7536:
7537: The promotion of the connection from plaintext to SSL failed
7538: <err> is the reason for the failure. There are two
7539: system calls involved in the promotion (one of which failed),
7540: a dup to produce
7541: a second fd on the raw socket over which the encrypted data
7542: will flow and IO::SOcket::SSL->new_from_fd which creates
7543: the SSL connection on the duped fd.
7544:
7545: =item (Blue) WARNING client did not respond to challenge
7546:
7547: This occurs on an insecure (non SSL) connection negotiation request.
7548: lond generates some number from the time, the PID and sends it to
7549: the client. The client must respond by echoing this information back.
7550: If the client does not do so, that's a violation of the challenge
7551: protocols and the connection will be failed.
7552:
7553: =item (Red) No manager table. Nobody can manage!!
7554:
7555: lond has the concept of privileged hosts that
7556: can perform remote management function such
7557: as update the hosts.tab. The manager hosts
7558: are described in the
7559: ~httpd/lonTabs/managers.tab file.
7560: this message is logged if this file is missing.
7561:
7562:
7563: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
7564:
7565: Reports the successful parse and registration
7566: of a specific manager.
7567:
7568: =item Green existing host <clustername:dnsname>
7569:
7570: The manager host is already defined in the hosts.tab
7571: the information in that table, rather than the info in the
7572: manager table will be used to determine the manager's ip.
7573:
7574: =item (Red) Unable to craete <filename>
7575:
7576: lond has been asked to create new versions of an administrative
7577: file (by a manager). When this is done, the new file is created
7578: in a temp file and then renamed into place so that there are always
7579: usable administrative files, even if the update fails. This failure
7580: message means that the temp file could not be created.
7581: The update is abandoned, and the old file is available for use.
7582:
7583: =item (Green) CopyFile from <oldname> to <newname> failed
7584:
7585: In an update of administrative files, the copy of the existing file to a
7586: backup file failed. The installation of the new file may still succeed,
7587: but there will not be a back up file to rever to (this should probably
7588: be yellow).
7589:
7590: =item (Green) Pushfile: backed up <oldname> to <newname>
7591:
7592: See above, the backup of the old administrative file succeeded.
7593:
7594: =item (Red) Pushfile: Unable to install <filename> <reason>
7595:
7596: The new administrative file could not be installed. In this case,
7597: the old administrative file is still in use.
7598:
7599: =item (Green) Installed new < filename>.
7600:
7601: The new administrative file was successfullly installed.
7602:
7603: =item (Red) Reinitializing lond pid=<pid>
7604:
7605: The lonc child process <pid> will be sent a USR2
7606: signal.
7607:
7608: =item (Red) Reinitializing self
7609:
7610: We've been asked to re-read our administrative files,and
7611: are doing so.
7612:
7613: =item (Yellow) error:Invalid process identifier <ident>
7614:
7615: A reinit command was received, but the target part of the
7616: command was not valid. It must be either
7617: 'lond' or 'lonc' but was <ident>
7618:
7619: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
7620:
7621: Checking to see if lond has been handed a valid edit
7622: command. It is possible the edit command is not valid
7623: in that case there are no log messages to indicate that.
7624:
7625: =item Result of password change for <username> pwchange_success
7626:
7627: The password for <username> was
7628: successfully changed.
7629:
7630: =item Unable to open <user> passwd to change password
7631:
7632: Could not rewrite the
7633: internal password file for a user
7634:
7635: =item Result of password change for <user> : <result>
7636:
7637: A unix password change for <user> was attempted
7638: and the pipe returned <result>
7639:
7640: =item LWP GET: <message> for <fname> (<remoteurl>)
7641:
7642: The lightweight process fetch for a resource failed
7643: with <message> the local filename that should
7644: have existed/been created was <fname> the
7645: corresponding URI: <remoteurl> This is emitted in several
7646: places.
7647:
7648: =item Unable to move <transname> to <destname>
7649:
7650: From fetch_user_file_handler - the user file was replicated but could not
7651: be mv'd to its final location.
7652:
7653: =item Looking for <domain> <username>
7654:
7655: From user_has_session_handler - This should be a Debug call instead
7656: it indicates lond is about to check whether the specified user has a
7657: session active on the specified domain on the local host.
7658:
7659: =item Client <ip> (<name>) hanging up: <input>
7660:
7661: lond has been asked to exit by its client. The <ip> and <name> identify the
7662: client systemand <input> is the full exit command sent to the server.
7663:
7664: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
7665:
7666: A lond child terminated. NOte that this termination can also occur when the
7667: child receives the QUIT or DIE signals. <pid> is the process id of the child,
7668: <hostname> the host lond is working for, and <message> the reason the child died
7669: to the best of our ability to get it (I would guess that any numeric value
7670: represents and errno value). This is immediately followed by
7671:
7672: =item Famous last words: Catching exception - <log>
7673:
7674: Where log is some recent information about the state of the child.
7675:
7676: =item Red CRITICAL: TIME OUT <pid>
7677:
7678: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
7679: doing an HTTP::GET.
7680:
7681: =item child <pid> died
7682:
7683: The reaper caught a SIGCHILD for the lond child process <pid>
7684: This should be modified to also display the IP of the dying child
7685: $children{$pid}
7686:
7687: =item Unknown child 0 died
7688: A child died but the wait for it returned a pid of zero which really should not
7689: ever happen.
7690:
7691: =item Child <which> - <pid> looks like we missed it's death
7692:
7693: When a sigchild is received, the reaper process checks all children to see if they are
7694: alive. If children are dying quite quickly, the lack of signal queuing can mean
7695: that a signal hearalds the death of more than one child. If so this message indicates
7696: which other one died. <which> is the ip of a dead child
7697:
7698: =item Free socket: <shutdownretval>
7699:
7700: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
7701: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
7702: to return anything. This is followed by:
7703:
7704: =item Red CRITICAL: Shutting down
7705:
7706: Just prior to exit.
7707:
7708: =item Free socket: <shutdownretval>
7709:
7710: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
7711: This is followed by:
7712:
7713: =item (Red) CRITICAL: Restarting
7714:
7715: lond is about to exec itself to restart.
7716:
7717: =item (Blue) Updating connections
7718:
7719: (In response to a USR2). All the children (except the one for localhost)
7720: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
7721:
7722: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
7723:
7724: Due to USR2 as above.
7725:
7726: =item (Green) keeping child for ip <ip> (pid = <pid>)
7727:
7728: In response to USR2 as above, the child indicated is not being restarted because
7729: it's assumed that we'll always need a child for the localhost.
7730:
7731:
7732: =item Going to check on the children
7733:
7734: Parent is about to check on the health of the child processes.
7735: Note that this is in response to a USR1 sent to the parent lond.
7736: there may be one or more of the next two messages:
7737:
7738: =item <pid> is dead
7739:
7740: A child that we have in our child hash as alive has evidently died.
7741:
7742: =item Child <pid> did not respond
7743:
7744: In the health check the child <pid> did not update/produce a pid_.txt
7745: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
7746: assumed to be hung in some un-fixable way.
7747:
7748: =item Finished checking children
7749:
7750: Master processs's USR1 processing is cojmplete.
7751:
7752: =item (Red) CRITICAL: ------- Starting ------
7753:
7754: (There are more '-'s on either side). Lond has forked itself off to
7755: form a new session and is about to start actual initialization.
7756:
7757: =item (Green) Attempting to start child (<client>)
7758:
7759: Started a new child process for <client>. Client is IO::Socket object
7760: connected to the child. This was as a result of a TCP/IP connection from a client.
7761:
7762: =item Unable to determine who caller was, getpeername returned nothing
7763:
7764: In child process initialization. either getpeername returned undef or
7765: a zero sized object was returned. Processing continues, but in my opinion,
7766: this should be cause for the child to exit.
7767:
7768: =item Unable to determine clientip
7769:
7770: In child process initialization. The peer address from getpeername was not defined.
7771: The client address is stored as "Unavailable" and processing continues.
7772:
7773: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
7774:
7775: In child initialization. A good connectionw as received from <ip>.
7776:
7777: =over 2
7778:
7779: =item <name>
7780:
7781: is the name of the client from hosts.tab.
7782:
7783: =item <type>
7784:
7785: Is the connection type which is either
7786:
7787: =over 2
7788:
7789: =item manager
7790:
7791: The connection is from a manager node, not in hosts.tab
7792:
7793: =item client
7794:
7795: the connection is from a non-manager in the hosts.tab
7796:
7797: =item both
7798:
7799: The connection is from a manager in the hosts.tab.
7800:
7801: =back
7802:
7803: =back
7804:
7805: =item (Blue) Certificates not installed -- trying insecure auth
7806:
7807: One of the certificate file, key file or
7808: certificate authority file could not be found for a client attempting
7809: SSL connection intiation. COnnection will be attemptied in in-secure mode.
7810: (this would be a system with an up to date lond that has not gotten a
7811: certificate from us).
7812:
7813: =item (Green) Successful local authentication
7814:
7815: A local connection successfully negotiated the encryption key.
7816: In this case the IDEA key is in a file (that is hopefully well protected).
7817:
7818: =item (Green) Successful ssl authentication with <client>
7819:
7820: The client (<client> is the peer's name in hosts.tab), has successfully
7821: negotiated an SSL connection with this child process.
7822:
7823: =item (Green) Successful insecure authentication with <client>
7824:
7825:
7826: The client has successfully negotiated an insecure connection withthe child process.
7827:
7828: =item (Yellow) Attempted insecure connection disallowed
7829:
7830: The client attempted and failed to successfully negotiate a successful insecure
7831: connection. This can happen either because the variable londAllowInsecure is false
7832: or undefined, or becuse the child did not successfully echo back the challenge
7833: string.
7834:
7835:
7836: =back
7837:
7838:
7839: =cut
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