1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.434 2009/12/03 17:43:19 www 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: 1.434 $'; #' 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: my $clientversion; # LonCAPA version running on client
71:
72: my $server;
73:
74: my $keymode;
75:
76: my $cipher; # Cipher key negotiated with client
77: my $tmpsnum = 0; # Id of tmpputs.
78:
79: #
80: # Connection type is:
81: # client - All client actions are allowed
82: # manager - only management functions allowed.
83: # both - Both management and client actions are allowed
84: #
85:
86: my $ConnectionType;
87:
88: my %managers; # Ip -> manager names
89:
90: my %perlvar; # Will have the apache conf defined perl vars.
91:
92: #
93: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
94: # Each element of the hash contains a reference to an array that contains:
95: # A reference to a sub that executes the request corresponding to the keyword.
96: # A flag that is true if the request must be encoded to be acceptable.
97: # A mask with bits as follows:
98: # CLIENT_OK - Set when the function is allowed by ordinary clients
99: # MANAGER_OK - Set when the function is allowed to manager clients.
100: #
101: my $CLIENT_OK = 1;
102: my $MANAGER_OK = 2;
103: my %Dispatcher;
104:
105:
106: #
107: # The array below are password error strings."
108: #
109: my $lastpwderror = 13; # Largest error number from lcpasswd.
110: my @passwderrors = ("ok",
111: "pwchange_failure - lcpasswd must be run as user 'www'",
112: "pwchange_failure - lcpasswd got incorrect number of arguments",
113: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
114: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
115: "pwchange_failure - lcpasswd User does not exist.",
116: "pwchange_failure - lcpasswd Incorrect current passwd",
117: "pwchange_failure - lcpasswd Unable to su to root.",
118: "pwchange_failure - lcpasswd Cannot set new passwd.",
119: "pwchange_failure - lcpasswd Username has invalid characters",
120: "pwchange_failure - lcpasswd Invalid characters in password",
121: "pwchange_failure - lcpasswd User already exists",
122: "pwchange_failure - lcpasswd Something went wrong with user addition.",
123: "pwchange_failure - lcpasswd Password mismatch",
124: "pwchange_failure - lcpasswd Error filename is invalid");
125:
126:
127: # The array below are lcuseradd error strings.:
128:
129: my $lastadderror = 13;
130: my @adderrors = ("ok",
131: "User ID mismatch, lcuseradd must run as user www",
132: "lcuseradd Incorrect number of command line parameters must be 3",
133: "lcuseradd Incorrect number of stdinput lines, must be 3",
134: "lcuseradd Too many other simultaneous pwd changes in progress",
135: "lcuseradd User does not exist",
136: "lcuseradd Unable to make www member of users's group",
137: "lcuseradd Unable to su to root",
138: "lcuseradd Unable to set password",
139: "lcuseradd Username has invalid characters",
140: "lcuseradd Password has an invalid character",
141: "lcuseradd User already exists",
142: "lcuseradd Could not add user.",
143: "lcuseradd Password mismatch");
144:
145:
146: # This array are the errors from lcinstallfile:
147:
148: my @installerrors = ("ok",
149: "Initial user id of client not that of www",
150: "Usage error, not enough command line arguments",
151: "Source file name does not exist",
152: "Destination file name does not exist",
153: "Some file operation failed",
154: "Invalid table filename."
155: );
156:
157: #
158: # Statistics that are maintained and dislayed in the status line.
159: #
160: my $Transactions = 0; # Number of attempted transactions.
161: my $Failures = 0; # Number of transcations failed.
162:
163: # ResetStatistics:
164: # Resets the statistics counters:
165: #
166: sub ResetStatistics {
167: $Transactions = 0;
168: $Failures = 0;
169: }
170:
171: #------------------------------------------------------------------------
172: #
173: # LocalConnection
174: # Completes the formation of a locally authenticated connection.
175: # This function will ensure that the 'remote' client is really the
176: # local host. If not, the connection is closed, and the function fails.
177: # If so, initcmd is parsed for the name of a file containing the
178: # IDEA session key. The fie is opened, read, deleted and the session
179: # key returned to the caller.
180: #
181: # Parameters:
182: # $Socket - Socket open on client.
183: # $initcmd - The full text of the init command.
184: #
185: # Returns:
186: # IDEA session key on success.
187: # undef on failure.
188: #
189: sub LocalConnection {
190: my ($Socket, $initcmd) = @_;
191: Debug("Attempting local connection: $initcmd client: $clientip");
192: if($clientip ne "127.0.0.1") {
193: &logthis('<font color="red"> LocalConnection rejecting non local: '
194: ."$clientip ne 127.0.0.1 </font>");
195: close $Socket;
196: return undef;
197: } else {
198: chomp($initcmd); # Get rid of \n in filename.
199: my ($init, $type, $name) = split(/:/, $initcmd);
200: Debug(" Init command: $init $type $name ");
201:
202: # Require that $init = init, and $type = local: Otherwise
203: # the caller is insane:
204:
205: if(($init ne "init") && ($type ne "local")) {
206: &logthis('<font color = "red"> LocalConnection: caller is insane! '
207: ."init = $init, and type = $type </font>");
208: close($Socket);;
209: return undef;
210:
211: }
212: # Now get the key filename:
213:
214: my $IDEAKey = lonlocal::ReadKeyFile($name);
215: return $IDEAKey;
216: }
217: }
218: #------------------------------------------------------------------------------
219: #
220: # SSLConnection
221: # Completes the formation of an ssh authenticated connection. The
222: # socket is promoted to an ssl socket. If this promotion and the associated
223: # certificate exchange are successful, the IDEA key is generated and sent
224: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
225: # the caller after the SSL tunnel is torn down.
226: #
227: # Parameters:
228: # Name Type Purpose
229: # $Socket IO::Socket::INET Plaintext socket.
230: #
231: # Returns:
232: # IDEA key on success.
233: # undef on failure.
234: #
235: sub SSLConnection {
236: my $Socket = shift;
237:
238: Debug("SSLConnection: ");
239: my $KeyFile = lonssl::KeyFile();
240: if(!$KeyFile) {
241: my $err = lonssl::LastError();
242: &logthis("<font color=\"red\"> CRITICAL"
243: ."Can't get key file $err </font>");
244: return undef;
245: }
246: my ($CACertificate,
247: $Certificate) = lonssl::CertificateFile();
248:
249:
250: # If any of the key, certificate or certificate authority
251: # certificate filenames are not defined, this can't work.
252:
253: if((!$Certificate) || (!$CACertificate)) {
254: my $err = lonssl::LastError();
255: &logthis("<font color=\"red\"> CRITICAL"
256: ."Can't get certificates: $err </font>");
257:
258: return undef;
259: }
260: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
261:
262: # Indicate to our peer that we can procede with
263: # a transition to ssl authentication:
264:
265: print $Socket "ok:ssl\n";
266:
267: Debug("Approving promotion -> ssl");
268: # And do so:
269:
270: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
271: $CACertificate,
272: $Certificate,
273: $KeyFile);
274: if(! ($SSLSocket) ) { # SSL socket promotion failed.
275: my $err = lonssl::LastError();
276: &logthis("<font color=\"red\"> CRITICAL "
277: ."SSL Socket promotion failed: $err </font>");
278: return undef;
279: }
280: Debug("SSL Promotion successful");
281:
282: #
283: # The only thing we'll use the socket for is to send the IDEA key
284: # to the peer:
285:
286: my $Key = lonlocal::CreateCipherKey();
287: print $SSLSocket "$Key\n";
288:
289: lonssl::Close($SSLSocket);
290:
291: Debug("Key exchange complete: $Key");
292:
293: return $Key;
294: }
295: #
296: # InsecureConnection:
297: # If insecure connections are allowd,
298: # exchange a challenge with the client to 'validate' the
299: # client (not really, but that's the protocol):
300: # We produce a challenge string that's sent to the client.
301: # The client must then echo the challenge verbatim to us.
302: #
303: # Parameter:
304: # Socket - Socket open on the client.
305: # Returns:
306: # 1 - success.
307: # 0 - failure (e.g.mismatch or insecure not allowed).
308: #
309: sub InsecureConnection {
310: my $Socket = shift;
311:
312: # Don't even start if insecure connections are not allowed.
313:
314: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
315: return 0;
316: }
317:
318: # Fabricate a challenge string and send it..
319:
320: my $challenge = "$$".time; # pid + time.
321: print $Socket "$challenge\n";
322: &status("Waiting for challenge reply");
323:
324: my $answer = <$Socket>;
325: $answer =~s/\W//g;
326: if($challenge eq $answer) {
327: return 1;
328: } else {
329: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
330: &status("No challenge reqply");
331: return 0;
332: }
333:
334:
335: }
336: #
337: # Safely execute a command (as long as it's not a shel command and doesn
338: # not require/rely on shell escapes. The function operates by doing a
339: # a pipe based fork and capturing stdout and stderr from the pipe.
340: #
341: # Formal Parameters:
342: # $line - A line of text to be executed as a command.
343: # Returns:
344: # The output from that command. If the output is multiline the caller
345: # must know how to split up the output.
346: #
347: #
348: sub execute_command {
349: my ($line) = @_;
350: my @words = split(/\s/, $line); # Bust the command up into words.
351: my $output = "";
352:
353: my $pid = open(CHILD, "-|");
354:
355: if($pid) { # Parent process
356: Debug("In parent process for execute_command");
357: my @data = <CHILD>; # Read the child's outupt...
358: close CHILD;
359: foreach my $output_line (@data) {
360: Debug("Adding $output_line");
361: $output .= $output_line; # Presumably has a \n on it.
362: }
363:
364: } else { # Child process
365: close (STDERR);
366: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
367: exec(@words); # won't return.
368: }
369: return $output;
370: }
371:
372:
373: # GetCertificate: Given a transaction that requires a certificate,
374: # this function will extract the certificate from the transaction
375: # request. Note that at this point, the only concept of a certificate
376: # is the hostname to which we are connected.
377: #
378: # Parameter:
379: # request - The request sent by our client (this parameterization may
380: # need to change when we really use a certificate granting
381: # authority.
382: #
383: sub GetCertificate {
384: my $request = shift;
385:
386: return $clientip;
387: }
388:
389: #
390: # Return true if client is a manager.
391: #
392: sub isManager {
393: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
394: }
395: #
396: # Return tru if client can do client functions
397: #
398: sub isClient {
399: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
400: }
401:
402:
403: #
404: # ReadManagerTable: Reads in the current manager table. For now this is
405: # done on each manager authentication because:
406: # - These authentications are not frequent
407: # - This allows dynamic changes to the manager table
408: # without the need to signal to the lond.
409: #
410: sub ReadManagerTable {
411:
412: &Debug("Reading manager table");
413: # Clean out the old table first..
414:
415: foreach my $key (keys %managers) {
416: delete $managers{$key};
417: }
418:
419: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
420: if (!open (MANAGERS, $tablename)) {
421: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
422: return;
423: }
424: while(my $host = <MANAGERS>) {
425: chomp($host);
426: if ($host =~ "^#") { # Comment line.
427: next;
428: }
429: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
430: # The entry is of the form:
431: # cluname:hostname
432: # cluname - A 'cluster hostname' is needed in order to negotiate
433: # the host key.
434: # hostname- The dns name of the host.
435: #
436: my($cluname, $dnsname) = split(/:/, $host);
437:
438: my $ip = gethostbyname($dnsname);
439: if(defined($ip)) { # bad names don't deserve entry.
440: my $hostip = inet_ntoa($ip);
441: $managers{$hostip} = $cluname;
442: logthis('<font color="green"> registering manager '.
443: "$dnsname as $cluname with $hostip </font>\n");
444: }
445: } else {
446: logthis('<font color="green"> existing host'." $host</font>\n");
447: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if clumemeber
448: }
449: }
450: }
451:
452: #
453: # ValidManager: Determines if a given certificate represents a valid manager.
454: # in this primitive implementation, the 'certificate' is
455: # just the connecting loncapa client name. This is checked
456: # against a valid client list in the configuration.
457: #
458: #
459: sub ValidManager {
460: my $certificate = shift;
461:
462: return isManager;
463: }
464: #
465: # CopyFile: Called as part of the process of installing a
466: # new configuration file. This function copies an existing
467: # file to a backup file.
468: # Parameters:
469: # oldfile - Name of the file to backup.
470: # newfile - Name of the backup file.
471: # Return:
472: # 0 - Failure (errno has failure reason).
473: # 1 - Success.
474: #
475: sub CopyFile {
476:
477: my ($oldfile, $newfile) = @_;
478:
479: if (! copy($oldfile,$newfile)) {
480: return 0;
481: }
482: chmod(0660, $newfile);
483: return 1;
484: }
485: #
486: # Host files are passed out with externally visible host IPs.
487: # If, for example, we are behind a fire-wall or NAT host, our
488: # internally visible IP may be different than the externally
489: # visible IP. Therefore, we always adjust the contents of the
490: # host file so that the entry for ME is the IP that we believe
491: # we have. At present, this is defined as the entry that
492: # DNS has for us. If by some chance we are not able to get a
493: # DNS translation for us, then we assume that the host.tab file
494: # is correct.
495: # BUGBUGBUG - in the future, we really should see if we can
496: # easily query the interface(s) instead.
497: # Parameter(s):
498: # contents - The contents of the host.tab to check.
499: # Returns:
500: # newcontents - The adjusted contents.
501: #
502: #
503: sub AdjustHostContents {
504: my $contents = shift;
505: my $adjusted;
506: my $me = $perlvar{'lonHostID'};
507:
508: foreach my $line (split(/\n/,$contents)) {
509: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
510: chomp($line);
511: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
512: if ($id eq $me) {
513: my $ip = gethostbyname($name);
514: my $ipnew = inet_ntoa($ip);
515: $ip = $ipnew;
516: # Reconstruct the host line and append to adjusted:
517:
518: my $newline = "$id:$domain:$role:$name:$ip";
519: if($maxcon ne "") { # Not all hosts have loncnew tuning params
520: $newline .= ":$maxcon:$idleto:$mincon";
521: }
522: $adjusted .= $newline."\n";
523:
524: } else { # Not me, pass unmodified.
525: $adjusted .= $line."\n";
526: }
527: } else { # Blank or comment never re-written.
528: $adjusted .= $line."\n"; # Pass blanks and comments as is.
529: }
530: }
531: return $adjusted;
532: }
533: #
534: # InstallFile: Called to install an administrative file:
535: # - The file is created int a temp directory called <name>.tmp
536: # - lcinstall file is called to install the file.
537: # since the web app has no direct write access to the table directory
538: #
539: # Parameters:
540: # Name of the file
541: # File Contents.
542: # Return:
543: # nonzero - success.
544: # 0 - failure and $! has an errno.
545: # Assumptions:
546: # File installtion is a relatively infrequent
547: #
548: sub InstallFile {
549:
550: my ($Filename, $Contents) = @_;
551: # my $TempFile = $Filename.".tmp";
552: my $exedir = $perlvar{'lonDaemons'};
553: my $tmpdir = $exedir.'/tmp/';
554: my $TempFile = $tmpdir."TempTableFile.tmp";
555:
556: # Open the file for write:
557:
558: my $fh = IO::File->new("> $TempFile"); # Write to temp.
559: if(!(defined $fh)) {
560: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
561: return 0;
562: }
563: # write the contents of the file:
564:
565: print $fh ($Contents);
566: $fh->close; # In case we ever have a filesystem w. locking
567:
568: chmod(0664, $TempFile); # Everyone can write it.
569:
570: # Use lcinstall file to put the file in the table directory...
571:
572: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
573: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
574: close $pf;
575: my $err = $?;
576: &Debug("Status is $err");
577: if ($err != 0) {
578: my $msg = $err;
579: if ($err < @installerrors) {
580: $msg = $installerrors[$err];
581: }
582: &logthis("Install failed for table file $Filename : $msg");
583: return 0;
584: }
585:
586: # Remove the temp file:
587:
588: unlink($TempFile);
589:
590: return 1;
591: }
592:
593:
594: #
595: # ConfigFileFromSelector: converts a configuration file selector
596: # into a configuration file pathname.
597: # It's probably no longer necessary to preserve
598: # special handling of hosts or domain as those
599: # files have been superceded by dns_hosts, dns_domain.
600: # The default action is just to prepend the directory
601: # and append .tab
602: #
603: #
604: # Parameters:
605: # selector - Configuration file selector.
606: # Returns:
607: # Full path to the file or undef if the selector is invalid.
608: #
609: sub ConfigFileFromSelector {
610: my $selector = shift;
611: my $tablefile;
612:
613: my $tabledir = $perlvar{'lonTabDir'}.'/';
614: if ($selector eq "hosts") {
615: $tablefile = $tabledir."hosts.tab";
616: } elsif ($selector eq "domain") {
617: $tablefile = $tabledir."domain.tab";
618: } else {
619: $tablefile = $tabledir.$selector.'.tab';
620: }
621: return $tablefile;
622:
623: }
624: #
625: # PushFile: Called to do an administrative push of a file.
626: # - Ensure the file being pushed is one we support.
627: # - Backup the old file to <filename.saved>
628: # - Separate the contents of the new file out from the
629: # rest of the request.
630: # - Write the new file.
631: # Parameter:
632: # Request - The entire user request. This consists of a : separated
633: # string pushfile:tablename:contents.
634: # NOTE: The contents may have :'s in it as well making things a bit
635: # more interesting... but not much.
636: # Returns:
637: # String to send to client ("ok" or "refused" if bad file).
638: #
639: sub PushFile {
640: my $request = shift;
641: my ($command, $filename, $contents) = split(":", $request, 3);
642: &Debug("PushFile");
643:
644: # At this point in time, pushes for only the following tables are
645: # supported:
646: # hosts.tab ($filename eq host).
647: # domain.tab ($filename eq domain).
648: # Construct the destination filename or reject the request.
649: #
650: # lonManage is supposed to ensure this, however this session could be
651: # part of some elaborate spoof that managed somehow to authenticate.
652: #
653:
654:
655: my $tablefile = ConfigFileFromSelector($filename);
656: if(! (defined $tablefile)) {
657: return "refused";
658: }
659:
660: # If the file being pushed is the host file, we adjust the entry for ourself so that the
661: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
662: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
663: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
664: # that possibilty.
665:
666: if($filename eq "host") {
667: $contents = AdjustHostContents($contents);
668: }
669:
670: # Install the new file:
671:
672: &logthis("Installing new $tablefile contents:\n$contents");
673: if(!InstallFile($tablefile, $contents)) {
674: &logthis('<font color="red"> Pushfile: unable to install '
675: .$tablefile." $! </font>");
676: return "error:$!";
677: } else {
678: &logthis('<font color="green"> Installed new '.$tablefile
679: ."</font>");
680:
681: }
682:
683:
684: # Indicate success:
685:
686: return "ok";
687:
688: }
689:
690: #
691: # Called to re-init either lonc or lond.
692: #
693: # Parameters:
694: # request - The full request by the client. This is of the form
695: # reinit:<process>
696: # where <process> is allowed to be either of
697: # lonc or lond
698: #
699: # Returns:
700: # The string to be sent back to the client either:
701: # ok - Everything worked just fine.
702: # error:why - There was a failure and why describes the reason.
703: #
704: #
705: sub ReinitProcess {
706: my $request = shift;
707:
708:
709: # separate the request (reinit) from the process identifier and
710: # validate it producing the name of the .pid file for the process.
711: #
712: #
713: my ($junk, $process) = split(":", $request);
714: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
715: if($process eq 'lonc') {
716: $processpidfile = $processpidfile."lonc.pid";
717: if (!open(PIDFILE, "< $processpidfile")) {
718: return "error:Open failed for $processpidfile";
719: }
720: my $loncpid = <PIDFILE>;
721: close(PIDFILE);
722: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
723: ."</font>");
724: kill("USR2", $loncpid);
725: } elsif ($process eq 'lond') {
726: logthis('<font color="red"> Reinitializing self (lond) </font>');
727: &UpdateHosts; # Lond is us!!
728: } else {
729: &logthis('<font color="yellow" Invalid reinit request for '.$process
730: ."</font>");
731: return "error:Invalid process identifier $process";
732: }
733: return 'ok';
734: }
735: # Validate a line in a configuration file edit script:
736: # Validation includes:
737: # - Ensuring the command is valid.
738: # - Ensuring the command has sufficient parameters
739: # Parameters:
740: # scriptline - A line to validate (\n has been stripped for what it's worth).
741: #
742: # Return:
743: # 0 - Invalid scriptline.
744: # 1 - Valid scriptline
745: # NOTE:
746: # Only the command syntax is checked, not the executability of the
747: # command.
748: #
749: sub isValidEditCommand {
750: my $scriptline = shift;
751:
752: # Line elements are pipe separated:
753:
754: my ($command, $key, $newline) = split(/\|/, $scriptline);
755: &logthis('<font color="green"> isValideditCommand checking: '.
756: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
757:
758: if ($command eq "delete") {
759: #
760: # key with no newline.
761: #
762: if( ($key eq "") || ($newline ne "")) {
763: return 0; # Must have key but no newline.
764: } else {
765: return 1; # Valid syntax.
766: }
767: } elsif ($command eq "replace") {
768: #
769: # key and newline:
770: #
771: if (($key eq "") || ($newline eq "")) {
772: return 0;
773: } else {
774: return 1;
775: }
776: } elsif ($command eq "append") {
777: if (($key ne "") && ($newline eq "")) {
778: return 1;
779: } else {
780: return 0;
781: }
782: } else {
783: return 0; # Invalid command.
784: }
785: return 0; # Should not get here!!!
786: }
787: #
788: # ApplyEdit - Applies an edit command to a line in a configuration
789: # file. It is the caller's responsiblity to validate the
790: # edit line.
791: # Parameters:
792: # $directive - A single edit directive to apply.
793: # Edit directives are of the form:
794: # append|newline - Appends a new line to the file.
795: # replace|key|newline - Replaces the line with key value 'key'
796: # delete|key - Deletes the line with key value 'key'.
797: # $editor - A config file editor object that contains the
798: # file being edited.
799: #
800: sub ApplyEdit {
801:
802: my ($directive, $editor) = @_;
803:
804: # Break the directive down into its command and its parameters
805: # (at most two at this point. The meaning of the parameters, if in fact
806: # they exist depends on the command).
807:
808: my ($command, $p1, $p2) = split(/\|/, $directive);
809:
810: if($command eq "append") {
811: $editor->Append($p1); # p1 - key p2 null.
812: } elsif ($command eq "replace") {
813: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
814: } elsif ($command eq "delete") {
815: $editor->DeleteLine($p1); # p1 - key p2 null.
816: } else { # Should not get here!!!
817: die "Invalid command given to ApplyEdit $command"
818: }
819: }
820: #
821: # AdjustOurHost:
822: # Adjusts a host file stored in a configuration file editor object
823: # for the true IP address of this host. This is necessary for hosts
824: # that live behind a firewall.
825: # Those hosts have a publicly distributed IP of the firewall, but
826: # internally must use their actual IP. We assume that a given
827: # host only has a single IP interface for now.
828: # Formal Parameters:
829: # editor - The configuration file editor to adjust. This
830: # editor is assumed to contain a hosts.tab file.
831: # Strategy:
832: # - Figure out our hostname.
833: # - Lookup the entry for this host.
834: # - Modify the line to contain our IP
835: # - Do a replace for this host.
836: sub AdjustOurHost {
837: my $editor = shift;
838:
839: # figure out who I am.
840:
841: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
842:
843: # Get my host file entry.
844:
845: my $ConfigLine = $editor->Find($myHostName);
846: if(! (defined $ConfigLine)) {
847: die "AdjustOurHost - no entry for me in hosts file $myHostName";
848: }
849: # figure out my IP:
850: # Use the config line to get my hostname.
851: # Use gethostbyname to translate that into an IP address.
852: #
853: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
854: #
855: # Reassemble the config line from the elements in the list.
856: # Note that if the loncnew items were not present before, they will
857: # be now even if they would be empty
858: #
859: my $newConfigLine = $id;
860: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
861: $newConfigLine .= ":".$item;
862: }
863: # Replace the line:
864:
865: $editor->ReplaceLine($id, $newConfigLine);
866:
867: }
868: #
869: # ReplaceConfigFile:
870: # Replaces a configuration file with the contents of a
871: # configuration file editor object.
872: # This is done by:
873: # - Copying the target file to <filename>.old
874: # - Writing the new file to <filename>.tmp
875: # - Moving <filename.tmp> -> <filename>
876: # This laborious process ensures that the system is never without
877: # a configuration file that's at least valid (even if the contents
878: # may be dated).
879: # Parameters:
880: # filename - Name of the file to modify... this is a full path.
881: # editor - Editor containing the file.
882: #
883: sub ReplaceConfigFile {
884:
885: my ($filename, $editor) = @_;
886:
887: CopyFile ($filename, $filename.".old");
888:
889: my $contents = $editor->Get(); # Get the contents of the file.
890:
891: InstallFile($filename, $contents);
892: }
893: #
894: #
895: # Called to edit a configuration table file
896: # Parameters:
897: # request - The entire command/request sent by lonc or lonManage
898: # Return:
899: # The reply to send to the client.
900: #
901: sub EditFile {
902: my $request = shift;
903:
904: # Split the command into it's pieces: edit:filetype:script
905:
906: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
907:
908: # Check the pre-coditions for success:
909:
910: if($cmd != "edit") { # Something is amiss afoot alack.
911: return "error:edit request detected, but request != 'edit'\n";
912: }
913: if( ($filetype ne "hosts") &&
914: ($filetype ne "domain")) {
915: return "error:edit requested with invalid file specifier: $filetype \n";
916: }
917:
918: # Split the edit script and check it's validity.
919:
920: my @scriptlines = split(/\n/, $script); # one line per element.
921: my $linecount = scalar(@scriptlines);
922: for(my $i = 0; $i < $linecount; $i++) {
923: chomp($scriptlines[$i]);
924: if(!isValidEditCommand($scriptlines[$i])) {
925: return "error:edit with bad script line: '$scriptlines[$i]' \n";
926: }
927: }
928:
929: # Execute the edit operation.
930: # - Create a config file editor for the appropriate file and
931: # - execute each command in the script:
932: #
933: my $configfile = ConfigFileFromSelector($filetype);
934: if (!(defined $configfile)) {
935: return "refused\n";
936: }
937: my $editor = ConfigFileEdit->new($configfile);
938:
939: for (my $i = 0; $i < $linecount; $i++) {
940: ApplyEdit($scriptlines[$i], $editor);
941: }
942: # If the file is the host file, ensure that our host is
943: # adjusted to have our ip:
944: #
945: if($filetype eq "host") {
946: AdjustOurHost($editor);
947: }
948: # Finally replace the current file with our file.
949: #
950: ReplaceConfigFile($configfile, $editor);
951:
952: return "ok\n";
953: }
954:
955: # read_profile
956: #
957: # Returns a set of specific entries from a user's profile file.
958: # this is a utility function that is used by both get_profile_entry and
959: # get_profile_entry_encrypted.
960: #
961: # Parameters:
962: # udom - Domain in which the user exists.
963: # uname - User's account name (loncapa account)
964: # namespace - The profile namespace to open.
965: # what - A set of & separated queries.
966: # Returns:
967: # If all ok: - The string that needs to be shipped back to the user.
968: # If failure - A string that starts with error: followed by the failure
969: # reason.. note that this probabyl gets shipped back to the
970: # user as well.
971: #
972: sub read_profile {
973: my ($udom, $uname, $namespace, $what) = @_;
974:
975: my $hashref = &tie_user_hash($udom, $uname, $namespace,
976: &GDBM_READER());
977: if ($hashref) {
978: my @queries=split(/\&/,$what);
979: my $qresult='';
980:
981: for (my $i=0;$i<=$#queries;$i++) {
982: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
983: }
984: $qresult=~s/\&$//; # Remove trailing & from last lookup.
985: if (&untie_user_hash($hashref)) {
986: return $qresult;
987: } else {
988: return "error: ".($!+0)." untie (GDBM) Failed";
989: }
990: } else {
991: if ($!+0 == 2) {
992: return "error:No such file or GDBM reported bad block error";
993: } else {
994: return "error: ".($!+0)." tie (GDBM) Failed";
995: }
996: }
997:
998: }
999: #--------------------- Request Handlers --------------------------------------------
1000: #
1001: # By convention each request handler registers itself prior to the sub
1002: # declaration:
1003: #
1004:
1005: #++
1006: #
1007: # Handles ping requests.
1008: # Parameters:
1009: # $cmd - the actual keyword that invoked us.
1010: # $tail - the tail of the request that invoked us.
1011: # $replyfd- File descriptor connected to the client
1012: # Implicit Inputs:
1013: # $currenthostid - Global variable that carries the name of the host we are
1014: # known as.
1015: # Returns:
1016: # 1 - Ok to continue processing.
1017: # 0 - Program should exit.
1018: # Side effects:
1019: # Reply information is sent to the client.
1020: sub ping_handler {
1021: my ($cmd, $tail, $client) = @_;
1022: Debug("$cmd $tail $client .. $currenthostid:");
1023:
1024: Reply( $client,\$currenthostid,"$cmd:$tail");
1025:
1026: return 1;
1027: }
1028: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1029:
1030: #++
1031: #
1032: # Handles pong requests. Pong replies with our current host id, and
1033: # the results of a ping sent to us via our lonc.
1034: #
1035: # Parameters:
1036: # $cmd - the actual keyword that invoked us.
1037: # $tail - the tail of the request that invoked us.
1038: # $replyfd- File descriptor connected to the client
1039: # Implicit Inputs:
1040: # $currenthostid - Global variable that carries the name of the host we are
1041: # connected to.
1042: # Returns:
1043: # 1 - Ok to continue processing.
1044: # 0 - Program should exit.
1045: # Side effects:
1046: # Reply information is sent to the client.
1047: sub pong_handler {
1048: my ($cmd, $tail, $replyfd) = @_;
1049:
1050: my $reply=&Apache::lonnet::reply("ping",$clientname);
1051: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1052: return 1;
1053: }
1054: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1055:
1056: #++
1057: # Called to establish an encrypted session key with the remote client.
1058: # Note that with secure lond, in most cases this function is never
1059: # invoked. Instead, the secure session key is established either
1060: # via a local file that's locked down tight and only lives for a short
1061: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1062: # bits from /dev/urandom, rather than the predictable pattern used by
1063: # by this sub. This sub is only used in the old-style insecure
1064: # key negotiation.
1065: # Parameters:
1066: # $cmd - the actual keyword that invoked us.
1067: # $tail - the tail of the request that invoked us.
1068: # $replyfd- File descriptor connected to the client
1069: # Implicit Inputs:
1070: # $currenthostid - Global variable that carries the name of the host
1071: # known as.
1072: # $clientname - Global variable that carries the name of the hsot we're connected to.
1073: # Returns:
1074: # 1 - Ok to continue processing.
1075: # 0 - Program should exit.
1076: # Implicit Outputs:
1077: # Reply information is sent to the client.
1078: # $cipher is set with a reference to a new IDEA encryption object.
1079: #
1080: sub establish_key_handler {
1081: my ($cmd, $tail, $replyfd) = @_;
1082:
1083: my $buildkey=time.$$.int(rand 100000);
1084: $buildkey=~tr/1-6/A-F/;
1085: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1086: my $key=$currenthostid.$clientname;
1087: $key=~tr/a-z/A-Z/;
1088: $key=~tr/G-P/0-9/;
1089: $key=~tr/Q-Z/0-9/;
1090: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1091: $key=substr($key,0,32);
1092: my $cipherkey=pack("H32",$key);
1093: $cipher=new IDEA $cipherkey;
1094: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1095:
1096: return 1;
1097:
1098: }
1099: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1100:
1101: # Handler for the load command. Returns the current system load average
1102: # to the requestor.
1103: #
1104: # Parameters:
1105: # $cmd - the actual keyword that invoked us.
1106: # $tail - the tail of the request that invoked us.
1107: # $replyfd- File descriptor connected to the client
1108: # Implicit Inputs:
1109: # $currenthostid - Global variable that carries the name of the host
1110: # known as.
1111: # $clientname - Global variable that carries the name of the hsot we're connected to.
1112: # Returns:
1113: # 1 - Ok to continue processing.
1114: # 0 - Program should exit.
1115: # Side effects:
1116: # Reply information is sent to the client.
1117: sub load_handler {
1118: my ($cmd, $tail, $replyfd) = @_;
1119:
1120: # Get the load average from /proc/loadavg and calculate it as a percentage of
1121: # the allowed load limit as set by the perl global variable lonLoadLim
1122:
1123: my $loadavg;
1124: my $loadfile=IO::File->new('/proc/loadavg');
1125:
1126: $loadavg=<$loadfile>;
1127: $loadavg =~ s/\s.*//g; # Extract the first field only.
1128:
1129: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1130:
1131: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1132:
1133: return 1;
1134: }
1135: ®ister_handler("load", \&load_handler, 0, 1, 0);
1136:
1137: #
1138: # Process the userload request. This sub returns to the client the current
1139: # user load average. It can be invoked either by clients or managers.
1140: #
1141: # Parameters:
1142: # $cmd - the actual keyword that invoked us.
1143: # $tail - the tail of the request that invoked us.
1144: # $replyfd- File descriptor connected to the client
1145: # Implicit Inputs:
1146: # $currenthostid - Global variable that carries the name of the host
1147: # known as.
1148: # $clientname - Global variable that carries the name of the hsot we're connected to.
1149: # Returns:
1150: # 1 - Ok to continue processing.
1151: # 0 - Program should exit
1152: # Implicit inputs:
1153: # whatever the userload() function requires.
1154: # Implicit outputs:
1155: # the reply is written to the client.
1156: #
1157: sub user_load_handler {
1158: my ($cmd, $tail, $replyfd) = @_;
1159:
1160: my $userloadpercent=&Apache::lonnet::userload();
1161: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1162:
1163: return 1;
1164: }
1165: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1166:
1167: # Process a request for the authorization type of a user:
1168: # (userauth).
1169: #
1170: # Parameters:
1171: # $cmd - the actual keyword that invoked us.
1172: # $tail - the tail of the request that invoked us.
1173: # $replyfd- File descriptor connected to the client
1174: # Returns:
1175: # 1 - Ok to continue processing.
1176: # 0 - Program should exit
1177: # Implicit outputs:
1178: # The user authorization type is written to the client.
1179: #
1180: sub user_authorization_type {
1181: my ($cmd, $tail, $replyfd) = @_;
1182:
1183: my $userinput = "$cmd:$tail";
1184:
1185: # Pull the domain and username out of the command tail.
1186: # and call get_auth_type to determine the authentication type.
1187:
1188: my ($udom,$uname)=split(/:/,$tail);
1189: my $result = &get_auth_type($udom, $uname);
1190: if($result eq "nouser") {
1191: &Failure( $replyfd, "unknown_user\n", $userinput);
1192: } else {
1193: #
1194: # We only want to pass the second field from get_auth_type
1195: # for ^krb.. otherwise we'll be handing out the encrypted
1196: # password for internals e.g.
1197: #
1198: my ($type,$otherinfo) = split(/:/,$result);
1199: if($type =~ /^krb/) {
1200: $type = $result;
1201: } else {
1202: $type .= ':';
1203: }
1204: &Reply( $replyfd, \$type, $userinput);
1205: }
1206:
1207: return 1;
1208: }
1209: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1210:
1211: # Process a request by a manager to push a hosts or domain table
1212: # to us. We pick apart the command and pass it on to the subs
1213: # that already exist to do this.
1214: #
1215: # Parameters:
1216: # $cmd - the actual keyword that invoked us.
1217: # $tail - the tail of the request that invoked us.
1218: # $client - File descriptor connected to the client
1219: # Returns:
1220: # 1 - Ok to continue processing.
1221: # 0 - Program should exit
1222: # Implicit Output:
1223: # a reply is written to the client.
1224: sub push_file_handler {
1225: my ($cmd, $tail, $client) = @_;
1226: &Debug("In push file handler");
1227: my $userinput = "$cmd:$tail";
1228:
1229: # At this time we only know that the IP of our partner is a valid manager
1230: # the code below is a hook to do further authentication (e.g. to resolve
1231: # spoofing).
1232:
1233: my $cert = &GetCertificate($userinput);
1234: if(&ValidManager($cert)) {
1235: &Debug("Valid manager: $client");
1236:
1237: # Now presumably we have the bona fides of both the peer host and the
1238: # process making the request.
1239:
1240: my $reply = &PushFile($userinput);
1241: &Reply($client, \$reply, $userinput);
1242:
1243: } else {
1244: &logthis("push_file_handler $client is not valid");
1245: &Failure( $client, "refused\n", $userinput);
1246: }
1247: return 1;
1248: }
1249: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1250:
1251: # The du_handler routine should be considered obsolete and is retained
1252: # for communication with legacy servers. Please see the du2_handler.
1253: #
1254: # du - list the disk usage of a directory recursively.
1255: #
1256: # note: stolen code from the ls file handler
1257: # under construction by Rick Banghart
1258: # .
1259: # Parameters:
1260: # $cmd - The command that dispatched us (du).
1261: # $ududir - The directory path to list... I'm not sure what this
1262: # is relative as things like ls:. return e.g.
1263: # no_such_dir.
1264: # $client - Socket open on the client.
1265: # Returns:
1266: # 1 - indicating that the daemon should not disconnect.
1267: # Side Effects:
1268: # The reply is written to $client.
1269: #
1270: sub du_handler {
1271: my ($cmd, $ududir, $client) = @_;
1272: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1273: my $userinput = "$cmd:$ududir";
1274:
1275: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1276: &Failure($client,"refused\n","$cmd:$ududir");
1277: return 1;
1278: }
1279: # Since $ududir could have some nasties in it,
1280: # we will require that ududir is a valid
1281: # directory. Just in case someone tries to
1282: # slip us a line like .;(cd /home/httpd rm -rf*)
1283: # etc.
1284: #
1285: if (-d $ududir) {
1286: my $total_size=0;
1287: my $code=sub {
1288: if ($_=~/\.\d+\./) { return;}
1289: if ($_=~/\.meta$/) { return;}
1290: if (-d $_) { return;}
1291: $total_size+=(stat($_))[7];
1292: };
1293: chdir($ududir);
1294: find($code,$ududir);
1295: $total_size=int($total_size/1024);
1296: &Reply($client,\$total_size,"$cmd:$ududir");
1297: } else {
1298: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1299: }
1300: return 1;
1301: }
1302: ®ister_handler("du", \&du_handler, 0, 1, 0);
1303:
1304: # Please also see the du_handler, which is obsoleted by du2.
1305: # du2_handler differs from du_handler in that required path to directory
1306: # provided by &propath() is prepended in the handler instead of on the
1307: # client side.
1308: #
1309: # du2 - list the disk usage of a directory recursively.
1310: #
1311: # Parameters:
1312: # $cmd - The command that dispatched us (du).
1313: # $tail - The tail of the request that invoked us.
1314: # $tail is a : separated list of the following:
1315: # - $ududir - directory path to list (before prepending)
1316: # - $getpropath = 1 if &propath() should prepend
1317: # - $uname - username to use for &propath or user dir
1318: # - $udom - domain to use for &propath or user dir
1319: # All are escaped.
1320: # $client - Socket open on the client.
1321: # Returns:
1322: # 1 - indicating that the daemon should not disconnect.
1323: # Side Effects:
1324: # The reply is written to $client.
1325: #
1326:
1327: sub du2_handler {
1328: my ($cmd, $tail, $client) = @_;
1329: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1330: my $userinput = "$cmd:$tail";
1331: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1332: &Failure($client,"refused\n","$cmd:$tail");
1333: return 1;
1334: }
1335: if ($getpropath) {
1336: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1337: $ududir = &propath($udom,$uname).'/'.$ududir;
1338: } else {
1339: &Failure($client,"refused\n","$cmd:$tail");
1340: return 1;
1341: }
1342: }
1343: # Since $ududir could have some nasties in it,
1344: # we will require that ududir is a valid
1345: # directory. Just in case someone tries to
1346: # slip us a line like .;(cd /home/httpd rm -rf*)
1347: # etc.
1348: #
1349: if (-d $ududir) {
1350: my $total_size=0;
1351: my $code=sub {
1352: if ($_=~/\.\d+\./) { return;}
1353: if ($_=~/\.meta$/) { return;}
1354: if (-d $_) { return;}
1355: $total_size+=(stat($_))[7];
1356: };
1357: chdir($ududir);
1358: find($code,$ududir);
1359: $total_size=int($total_size/1024);
1360: &Reply($client,\$total_size,"$cmd:$ududir");
1361: } else {
1362: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1363: }
1364: return 1;
1365: }
1366: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1367:
1368: #
1369: # The ls_handler routine should be considered obsolete and is retained
1370: # for communication with legacy servers. Please see the ls3_handler.
1371: #
1372: # ls - list the contents of a directory. For each file in the
1373: # selected directory the filename followed by the full output of
1374: # the stat function is returned. The returned info for each
1375: # file are separated by ':'. The stat fields are separated by &'s.
1376: # Parameters:
1377: # $cmd - The command that dispatched us (ls).
1378: # $ulsdir - The directory path to list... I'm not sure what this
1379: # is relative as things like ls:. return e.g.
1380: # no_such_dir.
1381: # $client - Socket open on the client.
1382: # Returns:
1383: # 1 - indicating that the daemon should not disconnect.
1384: # Side Effects:
1385: # The reply is written to $client.
1386: #
1387: sub ls_handler {
1388: # obsoleted by ls2_handler
1389: my ($cmd, $ulsdir, $client) = @_;
1390:
1391: my $userinput = "$cmd:$ulsdir";
1392:
1393: my $obs;
1394: my $rights;
1395: my $ulsout='';
1396: my $ulsfn;
1397: if (-e $ulsdir) {
1398: if(-d $ulsdir) {
1399: if (opendir(LSDIR,$ulsdir)) {
1400: while ($ulsfn=readdir(LSDIR)) {
1401: undef($obs);
1402: undef($rights);
1403: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1404: #We do some obsolete checking here
1405: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1406: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1407: my @obsolete=<FILE>;
1408: foreach my $obsolete (@obsolete) {
1409: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1410: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1411: }
1412: }
1413: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1414: if($obs eq '1') { $ulsout.="&1"; }
1415: else { $ulsout.="&0"; }
1416: if($rights eq '1') { $ulsout.="&1:"; }
1417: else { $ulsout.="&0:"; }
1418: }
1419: closedir(LSDIR);
1420: }
1421: } else {
1422: my @ulsstats=stat($ulsdir);
1423: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1424: }
1425: } else {
1426: $ulsout='no_such_dir';
1427: }
1428: if ($ulsout eq '') { $ulsout='empty'; }
1429: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1430:
1431: return 1;
1432:
1433: }
1434: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1435:
1436: # The ls2_handler routine should be considered obsolete and is retained
1437: # for communication with legacy servers. Please see the ls3_handler.
1438: # Please also see the ls_handler, which was itself obsoleted by ls2.
1439: # ls2_handler differs from ls_handler in that it escapes its return
1440: # values before concatenating them together with ':'s.
1441: #
1442: # ls2 - list the contents of a directory. For each file in the
1443: # selected directory the filename followed by the full output of
1444: # the stat function is returned. The returned info for each
1445: # file are separated by ':'. The stat fields are separated by &'s.
1446: # Parameters:
1447: # $cmd - The command that dispatched us (ls).
1448: # $ulsdir - The directory path to list... I'm not sure what this
1449: # is relative as things like ls:. return e.g.
1450: # no_such_dir.
1451: # $client - Socket open on the client.
1452: # Returns:
1453: # 1 - indicating that the daemon should not disconnect.
1454: # Side Effects:
1455: # The reply is written to $client.
1456: #
1457: sub ls2_handler {
1458: my ($cmd, $ulsdir, $client) = @_;
1459:
1460: my $userinput = "$cmd:$ulsdir";
1461:
1462: my $obs;
1463: my $rights;
1464: my $ulsout='';
1465: my $ulsfn;
1466: if (-e $ulsdir) {
1467: if(-d $ulsdir) {
1468: if (opendir(LSDIR,$ulsdir)) {
1469: while ($ulsfn=readdir(LSDIR)) {
1470: undef($obs);
1471: undef($rights);
1472: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1473: #We do some obsolete checking here
1474: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1475: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1476: my @obsolete=<FILE>;
1477: foreach my $obsolete (@obsolete) {
1478: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1479: if($obsolete =~ m|(<copyright>)(default)|) {
1480: $rights = 1;
1481: }
1482: }
1483: }
1484: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1485: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1486: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1487: $ulsout.= &escape($tmp).':';
1488: }
1489: closedir(LSDIR);
1490: }
1491: } else {
1492: my @ulsstats=stat($ulsdir);
1493: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1494: }
1495: } else {
1496: $ulsout='no_such_dir';
1497: }
1498: if ($ulsout eq '') { $ulsout='empty'; }
1499: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1500: return 1;
1501: }
1502: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1503: #
1504: # ls3 - list the contents of a directory. For each file in the
1505: # selected directory the filename followed by the full output of
1506: # the stat function is returned. The returned info for each
1507: # file are separated by ':'. The stat fields are separated by &'s.
1508: # Parameters:
1509: # $cmd - The command that dispatched us (ls).
1510: # $tail - The tail of the request that invoked us.
1511: # $tail is a : separated list of the following:
1512: # - $ulsdir - directory path to list (before prepending)
1513: # - $getpropath = 1 if &propath() should prepend
1514: # - $getuserdir = 1 if path to user dir in lonUsers should
1515: # prepend
1516: # - $alternate_root - path to prepend
1517: # - $uname - username to use for &propath or user dir
1518: # - $udom - domain to use for &propath or user dir
1519: # All of these except $getpropath and &getuserdir are escaped.
1520: # no_such_dir.
1521: # $client - Socket open on the client.
1522: # Returns:
1523: # 1 - indicating that the daemon should not disconnect.
1524: # Side Effects:
1525: # The reply is written to $client.
1526: #
1527:
1528: sub ls3_handler {
1529: my ($cmd, $tail, $client) = @_;
1530: my $userinput = "$cmd:$tail";
1531: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1532: split(/:/,$tail);
1533: if (defined($ulsdir)) {
1534: $ulsdir = &unescape($ulsdir);
1535: }
1536: if (defined($alternate_root)) {
1537: $alternate_root = &unescape($alternate_root);
1538: }
1539: if (defined($uname)) {
1540: $uname = &unescape($uname);
1541: }
1542: if (defined($udom)) {
1543: $udom = &unescape($udom);
1544: }
1545:
1546: my $dir_root = $perlvar{'lonDocRoot'};
1547: if ($getpropath) {
1548: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1549: $dir_root = &propath($udom,$uname);
1550: $dir_root =~ s/\/$//;
1551: } else {
1552: &Failure($client,"refused\n","$cmd:$tail");
1553: return 1;
1554: }
1555: } elsif ($getuserdir) {
1556: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1557: my $subdir=$uname.'__';
1558: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1559: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1560: ."/$udom/$subdir/$uname";
1561: } else {
1562: &Failure($client,"refused\n","$cmd:$tail");
1563: return 1;
1564: }
1565: } elsif ($alternate_root ne '') {
1566: $dir_root = $alternate_root;
1567: }
1568: if (($dir_root ne '') && ($dir_root ne '/')) {
1569: if ($ulsdir =~ /^\//) {
1570: $ulsdir = $dir_root.$ulsdir;
1571: } else {
1572: $ulsdir = $dir_root.'/'.$ulsdir;
1573: }
1574: }
1575: my $obs;
1576: my $rights;
1577: my $ulsout='';
1578: my $ulsfn;
1579: if (-e $ulsdir) {
1580: if(-d $ulsdir) {
1581: if (opendir(LSDIR,$ulsdir)) {
1582: while ($ulsfn=readdir(LSDIR)) {
1583: undef($obs);
1584: undef($rights);
1585: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1586: #We do some obsolete checking here
1587: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1588: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1589: my @obsolete=<FILE>;
1590: foreach my $obsolete (@obsolete) {
1591: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1592: if($obsolete =~ m|(<copyright>)(default)|) {
1593: $rights = 1;
1594: }
1595: }
1596: }
1597: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1598: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1599: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1600: $ulsout.= &escape($tmp).':';
1601: }
1602: closedir(LSDIR);
1603: }
1604: } else {
1605: my @ulsstats=stat($ulsdir);
1606: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1607: }
1608: } else {
1609: $ulsout='no_such_dir';
1610: }
1611: if ($ulsout eq '') { $ulsout='empty'; }
1612: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1613: return 1;
1614: }
1615: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1616:
1617: sub server_timezone_handler {
1618: my ($cmd,$tail,$client) = @_;
1619: my $userinput = "$cmd:$tail";
1620: my $timezone;
1621: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1622: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1623: if (-e $clockfile) {
1624: if (open(my $fh,"<$clockfile")) {
1625: while (<$fh>) {
1626: next if (/^[\#\s]/);
1627: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1628: $timezone = $1;
1629: last;
1630: }
1631: }
1632: close($fh);
1633: }
1634: } elsif (-e $tzfile) {
1635: if (open(my $fh,"<$tzfile")) {
1636: $timezone = <$fh>;
1637: close($fh);
1638: chomp($timezone);
1639: if ($timezone =~ m{^Etc/(\w+)$}) {
1640: $timezone = $1;
1641: }
1642: }
1643: }
1644: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1645: return 1;
1646: }
1647: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1648:
1649: sub server_loncaparev_handler {
1650: my ($cmd,$tail,$client) = @_;
1651: my $userinput = "$cmd:$tail";
1652: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1653: return 1;
1654: }
1655: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1656:
1657: # Process a reinit request. Reinit requests that either
1658: # lonc or lond be reinitialized so that an updated
1659: # host.tab or domain.tab can be processed.
1660: #
1661: # Parameters:
1662: # $cmd - the actual keyword that invoked us.
1663: # $tail - the tail of the request that invoked us.
1664: # $client - File descriptor connected to the client
1665: # Returns:
1666: # 1 - Ok to continue processing.
1667: # 0 - Program should exit
1668: # Implicit output:
1669: # a reply is sent to the client.
1670: #
1671: sub reinit_process_handler {
1672: my ($cmd, $tail, $client) = @_;
1673:
1674: my $userinput = "$cmd:$tail";
1675:
1676: my $cert = &GetCertificate($userinput);
1677: if(&ValidManager($cert)) {
1678: chomp($userinput);
1679: my $reply = &ReinitProcess($userinput);
1680: &Reply( $client, \$reply, $userinput);
1681: } else {
1682: &Failure( $client, "refused\n", $userinput);
1683: }
1684: return 1;
1685: }
1686: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1687:
1688: # Process the editing script for a table edit operation.
1689: # the editing operation must be encrypted and requested by
1690: # a manager host.
1691: #
1692: # Parameters:
1693: # $cmd - the actual keyword that invoked us.
1694: # $tail - the tail of the request that invoked us.
1695: # $client - File descriptor connected to the client
1696: # Returns:
1697: # 1 - Ok to continue processing.
1698: # 0 - Program should exit
1699: # Implicit output:
1700: # a reply is sent to the client.
1701: #
1702: sub edit_table_handler {
1703: my ($command, $tail, $client) = @_;
1704:
1705: my $userinput = "$command:$tail";
1706:
1707: my $cert = &GetCertificate($userinput);
1708: if(&ValidManager($cert)) {
1709: my($filetype, $script) = split(/:/, $tail);
1710: if (($filetype eq "hosts") ||
1711: ($filetype eq "domain")) {
1712: if($script ne "") {
1713: &Reply($client, # BUGBUG - EditFile
1714: &EditFile($userinput), # could fail.
1715: $userinput);
1716: } else {
1717: &Failure($client,"refused\n",$userinput);
1718: }
1719: } else {
1720: &Failure($client,"refused\n",$userinput);
1721: }
1722: } else {
1723: &Failure($client,"refused\n",$userinput);
1724: }
1725: return 1;
1726: }
1727: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1728:
1729: #
1730: # Authenticate a user against the LonCAPA authentication
1731: # database. Note that there are several authentication
1732: # possibilities:
1733: # - unix - The user can be authenticated against the unix
1734: # password file.
1735: # - internal - The user can be authenticated against a purely
1736: # internal per user password file.
1737: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1738: # ticket granting authority.
1739: # - user - The person tailoring LonCAPA can supply a user authentication
1740: # mechanism that is per system.
1741: #
1742: # Parameters:
1743: # $cmd - The command that got us here.
1744: # $tail - Tail of the command (remaining parameters).
1745: # $client - File descriptor connected to client.
1746: # Returns
1747: # 0 - Requested to exit, caller should shut down.
1748: # 1 - Continue processing.
1749: # Implicit inputs:
1750: # The authentication systems describe above have their own forms of implicit
1751: # input into the authentication process that are described above.
1752: #
1753: sub authenticate_handler {
1754: my ($cmd, $tail, $client) = @_;
1755:
1756:
1757: # Regenerate the full input line
1758:
1759: my $userinput = $cmd.":".$tail;
1760:
1761: # udom - User's domain.
1762: # uname - Username.
1763: # upass - User's password.
1764: # checkdefauth - Pass to validate_user() to try authentication
1765: # with default auth type(s) if no user account.
1766:
1767: my ($udom, $uname, $upass, $checkdefauth)=split(/:/,$tail);
1768: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
1769: chomp($upass);
1770: $upass=&unescape($upass);
1771:
1772: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1773: if($pwdcorrect) {
1774: &Reply( $client, "authorized\n", $userinput);
1775: #
1776: # Bad credentials: Failed to authorize
1777: #
1778: } else {
1779: &Failure( $client, "non_authorized\n", $userinput);
1780: }
1781:
1782: return 1;
1783: }
1784: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1785:
1786: #
1787: # Change a user's password. Note that this function is complicated by
1788: # the fact that a user may be authenticated in more than one way:
1789: # At present, we are not able to change the password for all types of
1790: # authentication methods. Only for:
1791: # unix - unix password or shadow passoword style authentication.
1792: # local - Locally written authentication mechanism.
1793: # For now, kerb4 and kerb5 password changes are not supported and result
1794: # in an error.
1795: # FUTURE WORK:
1796: # Support kerberos passwd changes?
1797: # Parameters:
1798: # $cmd - The command that got us here.
1799: # $tail - Tail of the command (remaining parameters).
1800: # $client - File descriptor connected to client.
1801: # Returns
1802: # 0 - Requested to exit, caller should shut down.
1803: # 1 - Continue processing.
1804: # Implicit inputs:
1805: # The authentication systems describe above have their own forms of implicit
1806: # input into the authentication process that are described above.
1807: sub change_password_handler {
1808: my ($cmd, $tail, $client) = @_;
1809:
1810: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1811:
1812: #
1813: # udom - user's domain.
1814: # uname - Username.
1815: # upass - Current password.
1816: # npass - New password.
1817: # context - Context in which this was called
1818: # (preferences or reset_by_email).
1819: # lonhost - HostID of server where request originated
1820:
1821: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1822:
1823: $upass=&unescape($upass);
1824: $npass=&unescape($npass);
1825: &Debug("Trying to change password for $uname");
1826:
1827: # First require that the user can be authenticated with their
1828: # old password unless context was 'reset_by_email':
1829:
1830: my ($validated,$failure);
1831: if ($context eq 'reset_by_email') {
1832: if ($lonhost eq '') {
1833: $failure = 'invalid_client';
1834: } else {
1835: $validated = 1;
1836: }
1837: } else {
1838: $validated = &validate_user($udom, $uname, $upass);
1839: }
1840: if($validated) {
1841: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1842:
1843: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1844: if ($howpwd eq 'internal') {
1845: &Debug("internal auth");
1846: my $salt=time;
1847: $salt=substr($salt,6,2);
1848: my $ncpass=crypt($npass,$salt);
1849: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1850: my $msg="Result of password change for $uname: pwchange_success";
1851: if ($lonhost) {
1852: $msg .= " - request originated from: $lonhost";
1853: }
1854: &logthis($msg);
1855: &Reply($client, "ok\n", $userinput);
1856: } else {
1857: &logthis("Unable to open $uname passwd "
1858: ."to change password");
1859: &Failure( $client, "non_authorized\n",$userinput);
1860: }
1861: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1862: my $result = &change_unix_password($uname, $npass);
1863: &logthis("Result of password change for $uname: ".
1864: $result);
1865: &Reply($client, \$result, $userinput);
1866: } else {
1867: # this just means that the current password mode is not
1868: # one we know how to change (e.g the kerberos auth modes or
1869: # locally written auth handler).
1870: #
1871: &Failure( $client, "auth_mode_error\n", $userinput);
1872: }
1873:
1874: } else {
1875: if ($failure eq '') {
1876: $failure = 'non_authorized';
1877: }
1878: &Failure( $client, "$failure\n", $userinput);
1879: }
1880:
1881: return 1;
1882: }
1883: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1884:
1885: #
1886: # Create a new user. User in this case means a lon-capa user.
1887: # The user must either already exist in some authentication realm
1888: # like kerberos or the /etc/passwd. If not, a user completely local to
1889: # this loncapa system is created.
1890: #
1891: # Parameters:
1892: # $cmd - The command that got us here.
1893: # $tail - Tail of the command (remaining parameters).
1894: # $client - File descriptor connected to client.
1895: # Returns
1896: # 0 - Requested to exit, caller should shut down.
1897: # 1 - Continue processing.
1898: # Implicit inputs:
1899: # The authentication systems describe above have their own forms of implicit
1900: # input into the authentication process that are described above.
1901: sub add_user_handler {
1902:
1903: my ($cmd, $tail, $client) = @_;
1904:
1905:
1906: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1907: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1908:
1909: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1910:
1911:
1912: if($udom eq $currentdomainid) { # Reject new users for other domains...
1913:
1914: my $oldumask=umask(0077);
1915: chomp($npass);
1916: $npass=&unescape($npass);
1917: my $passfilename = &password_path($udom, $uname);
1918: &Debug("Password file created will be:".$passfilename);
1919: if (-e $passfilename) {
1920: &Failure( $client, "already_exists\n", $userinput);
1921: } else {
1922: my $fperror='';
1923: if (!&mkpath($passfilename)) {
1924: $fperror="error: ".($!+0)." mkdir failed while attempting "
1925: ."makeuser";
1926: }
1927: unless ($fperror) {
1928: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1929: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
1930: } else {
1931: &Failure($client, \$fperror, $userinput);
1932: }
1933: }
1934: umask($oldumask);
1935: } else {
1936: &Failure($client, "not_right_domain\n",
1937: $userinput); # Even if we are multihomed.
1938:
1939: }
1940: return 1;
1941:
1942: }
1943: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1944:
1945: #
1946: # Change the authentication method of a user. Note that this may
1947: # also implicitly change the user's password if, for example, the user is
1948: # joining an existing authentication realm. Known authentication realms at
1949: # this time are:
1950: # internal - Purely internal password file (only loncapa knows this user)
1951: # local - Institutionally written authentication module.
1952: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1953: # kerb4 - kerberos version 4
1954: # kerb5 - kerberos version 5
1955: #
1956: # Parameters:
1957: # $cmd - The command that got us here.
1958: # $tail - Tail of the command (remaining parameters).
1959: # $client - File descriptor connected to client.
1960: # Returns
1961: # 0 - Requested to exit, caller should shut down.
1962: # 1 - Continue processing.
1963: # Implicit inputs:
1964: # The authentication systems describe above have their own forms of implicit
1965: # input into the authentication process that are described above.
1966: # NOTE:
1967: # This is also used to change the authentication credential values (e.g. passwd).
1968: #
1969: #
1970: sub change_authentication_handler {
1971:
1972: my ($cmd, $tail, $client) = @_;
1973:
1974: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1975:
1976: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1977: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1978: if ($udom ne $currentdomainid) {
1979: &Failure( $client, "not_right_domain\n", $client);
1980: } else {
1981:
1982: chomp($npass);
1983:
1984: $npass=&unescape($npass);
1985: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1986: my $passfilename = &password_path($udom, $uname);
1987: if ($passfilename) { # Not allowed to create a new user!!
1988: # If just changing the unix passwd. need to arrange to run
1989: # passwd since otherwise make_passwd_file will run
1990: # lcuseradd which fails if an account already exists
1991: # (to prevent an unscrupulous LONCAPA admin from stealing
1992: # an existing account by overwriting it as a LonCAPA account).
1993:
1994: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1995: my $result = &change_unix_password($uname, $npass);
1996: &logthis("Result of password change for $uname: ".$result);
1997: if ($result eq "ok") {
1998: &Reply($client, \$result);
1999: } else {
2000: &Failure($client, \$result);
2001: }
2002: } else {
2003: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
2004: #
2005: # If the current auth mode is internal, and the old auth mode was
2006: # unix, or krb*, and the user is an author for this domain,
2007: # re-run manage_permissions for that role in order to be able
2008: # to take ownership of the construction space back to www:www
2009: #
2010:
2011:
2012: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
2013: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
2014: if(&is_author($udom, $uname)) {
2015: &Debug(" Need to manage author permissions...");
2016: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
2017: }
2018: }
2019: &Reply($client, \$result, $userinput);
2020: }
2021:
2022:
2023: } else {
2024: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2025: }
2026: }
2027: return 1;
2028: }
2029: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2030:
2031: #
2032: # Determines if this is the home server for a user. The home server
2033: # for a user will have his/her lon-capa passwd file. Therefore all we need
2034: # to do is determine if this file exists.
2035: #
2036: # Parameters:
2037: # $cmd - The command that got us here.
2038: # $tail - Tail of the command (remaining parameters).
2039: # $client - File descriptor connected to client.
2040: # Returns
2041: # 0 - Requested to exit, caller should shut down.
2042: # 1 - Continue processing.
2043: # Implicit inputs:
2044: # The authentication systems describe above have their own forms of implicit
2045: # input into the authentication process that are described above.
2046: #
2047: sub is_home_handler {
2048: my ($cmd, $tail, $client) = @_;
2049:
2050: my $userinput = "$cmd:$tail";
2051:
2052: my ($udom,$uname)=split(/:/,$tail);
2053: chomp($uname);
2054: my $passfile = &password_filename($udom, $uname);
2055: if($passfile) {
2056: &Reply( $client, "found\n", $userinput);
2057: } else {
2058: &Failure($client, "not_found\n", $userinput);
2059: }
2060: return 1;
2061: }
2062: ®ister_handler("home", \&is_home_handler, 0,1,0);
2063:
2064: #
2065: # Process an update request for a resource.
2066: # A resource has been modified that we hold a subscription to.
2067: # If the resource is not local, then we must update, or at least invalidate our
2068: # cached copy of the resource.
2069: # Parameters:
2070: # $cmd - The command that got us here.
2071: # $tail - Tail of the command (remaining parameters).
2072: # $client - File descriptor connected to client.
2073: # Returns
2074: # 0 - Requested to exit, caller should shut down.
2075: # 1 - Continue processing.
2076: # Implicit inputs:
2077: # The authentication systems describe above have their own forms of implicit
2078: # input into the authentication process that are described above.
2079: #
2080: sub update_resource_handler {
2081:
2082: my ($cmd, $tail, $client) = @_;
2083:
2084: my $userinput = "$cmd:$tail";
2085:
2086: my $fname= $tail; # This allows interactive testing
2087:
2088:
2089: my $ownership=ishome($fname);
2090: if ($ownership eq 'not_owner') {
2091: if (-e $fname) {
2092: # Delete preview file, if exists
2093: unlink("$fname.tmp");
2094: # Get usage stats
2095: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2096: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2097: my $now=time;
2098: my $since=$now-$atime;
2099: # If the file has not been used within lonExpire seconds,
2100: # unsubscribe from it and delete local copy
2101: if ($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: # Yes, this is in active use. Get a fresh copy. Since it might be in
2108: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2109: my $transname="$fname.in.transfer";
2110: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2111: my $response;
2112: alarm(120);
2113: {
2114: my $ua=new LWP::UserAgent;
2115: my $request=new HTTP::Request('GET',"$remoteurl");
2116: $response=$ua->request($request,$transname);
2117: }
2118: alarm(0);
2119: if ($response->is_error()) {
2120: unlink($transname);
2121: my $message=$response->status_line;
2122: &logthis("LWP GET: $message for $fname ($remoteurl)");
2123: } else {
2124: if ($remoteurl!~/\.meta$/) {
2125: alarm(120);
2126: {
2127: my $ua=new LWP::UserAgent;
2128: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2129: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2130: if ($mresponse->is_error()) {
2131: unlink($fname.'.meta');
2132: }
2133: }
2134: alarm(0);
2135: }
2136: # we successfully transfered, copy file over to real name
2137: rename($transname,$fname);
2138: &devalidate_meta_cache($fname);
2139: }
2140: }
2141: &Reply( $client, "ok\n", $userinput);
2142: } else {
2143: &Failure($client, "not_found\n", $userinput);
2144: }
2145: } else {
2146: &Failure($client, "rejected\n", $userinput);
2147: }
2148: return 1;
2149: }
2150: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2151:
2152: sub devalidate_meta_cache {
2153: my ($url) = @_;
2154: use Cache::Memcached;
2155: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2156: $url = &Apache::lonnet::declutter($url);
2157: $url =~ s-\.meta$--;
2158: my $id = &escape('meta:'.$url);
2159: $memcache->delete($id);
2160: }
2161:
2162: #
2163: # Fetch a user file from a remote server to the user's home directory
2164: # userfiles subdir.
2165: # Parameters:
2166: # $cmd - The command that got us here.
2167: # $tail - Tail of the command (remaining parameters).
2168: # $client - File descriptor connected to client.
2169: # Returns
2170: # 0 - Requested to exit, caller should shut down.
2171: # 1 - Continue processing.
2172: #
2173: sub fetch_user_file_handler {
2174:
2175: my ($cmd, $tail, $client) = @_;
2176:
2177: my $userinput = "$cmd:$tail";
2178: my $fname = $tail;
2179: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2180: my $udir=&propath($udom,$uname).'/userfiles';
2181: unless (-e $udir) {
2182: mkdir($udir,0770);
2183: }
2184: Debug("fetch user file for $fname");
2185: if (-e $udir) {
2186: $ufile=~s/^[\.\~]+//;
2187:
2188: # IF necessary, create the path right down to the file.
2189: # Note that any regular files in the way of this path are
2190: # wiped out to deal with some earlier folly of mine.
2191:
2192: if (!&mkpath($udir.'/'.$ufile)) {
2193: &Failure($client, "unable_to_create\n", $userinput);
2194: }
2195:
2196: my $destname=$udir.'/'.$ufile;
2197: my $transname=$udir.'/'.$ufile.'.in.transit';
2198: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2199: my $response;
2200: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2201: alarm(120);
2202: {
2203: my $ua=new LWP::UserAgent;
2204: my $request=new HTTP::Request('GET',"$remoteurl");
2205: $response=$ua->request($request,$transname);
2206: }
2207: alarm(0);
2208: if ($response->is_error()) {
2209: unlink($transname);
2210: my $message=$response->status_line;
2211: &logthis("LWP GET: $message for $fname ($remoteurl)");
2212: &Failure($client, "failed\n", $userinput);
2213: } else {
2214: Debug("Renaming $transname to $destname");
2215: if (!rename($transname,$destname)) {
2216: &logthis("Unable to move $transname to $destname");
2217: unlink($transname);
2218: &Failure($client, "failed\n", $userinput);
2219: } else {
2220: &Reply($client, "ok\n", $userinput);
2221: }
2222: }
2223: } else {
2224: &Failure($client, "not_home\n", $userinput);
2225: }
2226: return 1;
2227: }
2228: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2229:
2230: #
2231: # Remove a file from a user's home directory userfiles subdirectory.
2232: # Parameters:
2233: # cmd - the Lond request keyword that got us here.
2234: # tail - the part of the command past the keyword.
2235: # client- File descriptor connected with the client.
2236: #
2237: # Returns:
2238: # 1 - Continue processing.
2239: sub remove_user_file_handler {
2240: my ($cmd, $tail, $client) = @_;
2241:
2242: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2243:
2244: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2245: if ($ufile =~m|/\.\./|) {
2246: # any files paths with /../ in them refuse
2247: # to deal with
2248: &Failure($client, "refused\n", "$cmd:$tail");
2249: } else {
2250: my $udir = &propath($udom,$uname);
2251: if (-e $udir) {
2252: my $file=$udir.'/userfiles/'.$ufile;
2253: if (-e $file) {
2254: #
2255: # If the file is a regular file unlink is fine...
2256: # However it's possible the client wants a dir.
2257: # removed, in which case rmdir is more approprate:
2258: #
2259: if (-f $file){
2260: unlink($file);
2261: } elsif(-d $file) {
2262: rmdir($file);
2263: }
2264: if (-e $file) {
2265: # File is still there after we deleted it ?!?
2266:
2267: &Failure($client, "failed\n", "$cmd:$tail");
2268: } else {
2269: &Reply($client, "ok\n", "$cmd:$tail");
2270: }
2271: } else {
2272: &Failure($client, "not_found\n", "$cmd:$tail");
2273: }
2274: } else {
2275: &Failure($client, "not_home\n", "$cmd:$tail");
2276: }
2277: }
2278: return 1;
2279: }
2280: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2281:
2282: #
2283: # make a directory in a user's home directory userfiles subdirectory.
2284: # Parameters:
2285: # cmd - the Lond request keyword that got us here.
2286: # tail - the part of the command past the keyword.
2287: # client- File descriptor connected with the client.
2288: #
2289: # Returns:
2290: # 1 - Continue processing.
2291: sub mkdir_user_file_handler {
2292: my ($cmd, $tail, $client) = @_;
2293:
2294: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2295: $dir=&unescape($dir);
2296: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2297: if ($ufile =~m|/\.\./|) {
2298: # any files paths with /../ in them refuse
2299: # to deal with
2300: &Failure($client, "refused\n", "$cmd:$tail");
2301: } else {
2302: my $udir = &propath($udom,$uname);
2303: if (-e $udir) {
2304: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2305: if (!&mkpath($newdir)) {
2306: &Failure($client, "failed\n", "$cmd:$tail");
2307: }
2308: &Reply($client, "ok\n", "$cmd:$tail");
2309: } else {
2310: &Failure($client, "not_home\n", "$cmd:$tail");
2311: }
2312: }
2313: return 1;
2314: }
2315: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2316:
2317: #
2318: # rename a file in a user's home directory userfiles subdirectory.
2319: # Parameters:
2320: # cmd - the Lond request keyword that got us here.
2321: # tail - the part of the command past the keyword.
2322: # client- File descriptor connected with the client.
2323: #
2324: # Returns:
2325: # 1 - Continue processing.
2326: sub rename_user_file_handler {
2327: my ($cmd, $tail, $client) = @_;
2328:
2329: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2330: $old=&unescape($old);
2331: $new=&unescape($new);
2332: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2333: # any files paths with /../ in them refuse to deal with
2334: &Failure($client, "refused\n", "$cmd:$tail");
2335: } else {
2336: my $udir = &propath($udom,$uname);
2337: if (-e $udir) {
2338: my $oldfile=$udir.'/userfiles/'.$old;
2339: my $newfile=$udir.'/userfiles/'.$new;
2340: if (-e $newfile) {
2341: &Failure($client, "exists\n", "$cmd:$tail");
2342: } elsif (! -e $oldfile) {
2343: &Failure($client, "not_found\n", "$cmd:$tail");
2344: } else {
2345: if (!rename($oldfile,$newfile)) {
2346: &Failure($client, "failed\n", "$cmd:$tail");
2347: } else {
2348: &Reply($client, "ok\n", "$cmd:$tail");
2349: }
2350: }
2351: } else {
2352: &Failure($client, "not_home\n", "$cmd:$tail");
2353: }
2354: }
2355: return 1;
2356: }
2357: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2358:
2359: #
2360: # Checks if the specified user has an active session on the server
2361: # return ok if so, not_found if not
2362: #
2363: # Parameters:
2364: # cmd - The request keyword that dispatched to tus.
2365: # tail - The tail of the request (colon separated parameters).
2366: # client - Filehandle open on the client.
2367: # Return:
2368: # 1.
2369: sub user_has_session_handler {
2370: my ($cmd, $tail, $client) = @_;
2371:
2372: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2373:
2374: &logthis("Looking for $udom $uname");
2375: opendir(DIR,$perlvar{'lonIDsDir'});
2376: my $filename;
2377: while ($filename=readdir(DIR)) {
2378: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2379: }
2380: if ($filename) {
2381: &Reply($client, "ok\n", "$cmd:$tail");
2382: } else {
2383: &Failure($client, "not_found\n", "$cmd:$tail");
2384: }
2385: return 1;
2386:
2387: }
2388: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2389:
2390: #
2391: # Authenticate access to a user file by checking that the token the user's
2392: # passed also exists in their session file
2393: #
2394: # Parameters:
2395: # cmd - The request keyword that dispatched to tus.
2396: # tail - The tail of the request (colon separated parameters).
2397: # client - Filehandle open on the client.
2398: # Return:
2399: # 1.
2400: sub token_auth_user_file_handler {
2401: my ($cmd, $tail, $client) = @_;
2402:
2403: my ($fname, $session) = split(/:/, $tail);
2404:
2405: chomp($session);
2406: my $reply="non_auth";
2407: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2408: if (open(ENVIN,"$file")) {
2409: flock(ENVIN,LOCK_SH);
2410: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2411: if (exists($disk_env{"userfile.$fname"})) {
2412: $reply="ok";
2413: } else {
2414: foreach my $envname (keys(%disk_env)) {
2415: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2416: $reply="ok";
2417: last;
2418: }
2419: }
2420: }
2421: untie(%disk_env);
2422: close(ENVIN);
2423: &Reply($client, \$reply, "$cmd:$tail");
2424: } else {
2425: &Failure($client, "invalid_token\n", "$cmd:$tail");
2426: }
2427: return 1;
2428:
2429: }
2430: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2431:
2432: #
2433: # Unsubscribe from a resource.
2434: #
2435: # Parameters:
2436: # $cmd - The command that got us here.
2437: # $tail - Tail of the command (remaining parameters).
2438: # $client - File descriptor connected to client.
2439: # Returns
2440: # 0 - Requested to exit, caller should shut down.
2441: # 1 - Continue processing.
2442: #
2443: sub unsubscribe_handler {
2444: my ($cmd, $tail, $client) = @_;
2445:
2446: my $userinput= "$cmd:$tail";
2447:
2448: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2449:
2450: &Debug("Unsubscribing $fname");
2451: if (-e $fname) {
2452: &Debug("Exists");
2453: &Reply($client, &unsub($fname,$clientip), $userinput);
2454: } else {
2455: &Failure($client, "not_found\n", $userinput);
2456: }
2457: return 1;
2458: }
2459: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2460:
2461: # Subscribe to a resource
2462: #
2463: # Parameters:
2464: # $cmd - The command that got us here.
2465: # $tail - Tail of the command (remaining parameters).
2466: # $client - File descriptor connected to client.
2467: # Returns
2468: # 0 - Requested to exit, caller should shut down.
2469: # 1 - Continue processing.
2470: #
2471: sub subscribe_handler {
2472: my ($cmd, $tail, $client)= @_;
2473:
2474: my $userinput = "$cmd:$tail";
2475:
2476: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2477:
2478: return 1;
2479: }
2480: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2481:
2482: #
2483: # Determine the latest version of a resource (it looks for the highest
2484: # past version and then returns that +1)
2485: #
2486: # Parameters:
2487: # $cmd - The command that got us here.
2488: # $tail - Tail of the command (remaining parameters).
2489: # (Should consist of an absolute path to a file)
2490: # $client - File descriptor connected to client.
2491: # Returns
2492: # 0 - Requested to exit, caller should shut down.
2493: # 1 - Continue processing.
2494: #
2495: sub current_version_handler {
2496: my ($cmd, $tail, $client) = @_;
2497:
2498: my $userinput= "$cmd:$tail";
2499:
2500: my $fname = $tail;
2501: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2502: return 1;
2503:
2504: }
2505: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2506:
2507: # Make an entry in a user's activity log.
2508: #
2509: # Parameters:
2510: # $cmd - The command that got us here.
2511: # $tail - Tail of the command (remaining parameters).
2512: # $client - File descriptor connected to client.
2513: # Returns
2514: # 0 - Requested to exit, caller should shut down.
2515: # 1 - Continue processing.
2516: #
2517: sub activity_log_handler {
2518: my ($cmd, $tail, $client) = @_;
2519:
2520:
2521: my $userinput= "$cmd:$tail";
2522:
2523: my ($udom,$uname,$what)=split(/:/,$tail);
2524: chomp($what);
2525: my $proname=&propath($udom,$uname);
2526: my $now=time;
2527: my $hfh;
2528: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2529: print $hfh "$now:$clientname:$what\n";
2530: &Reply( $client, "ok\n", $userinput);
2531: } else {
2532: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2533: ."while attempting log\n",
2534: $userinput);
2535: }
2536:
2537: return 1;
2538: }
2539: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2540:
2541: #
2542: # Put a namespace entry in a user profile hash.
2543: # My druthers would be for this to be an encrypted interaction too.
2544: # anything that might be an inadvertent covert channel about either
2545: # user authentication or user personal information....
2546: #
2547: # Parameters:
2548: # $cmd - The command that got us here.
2549: # $tail - Tail of the command (remaining parameters).
2550: # $client - File descriptor connected to client.
2551: # Returns
2552: # 0 - Requested to exit, caller should shut down.
2553: # 1 - Continue processing.
2554: #
2555: sub put_user_profile_entry {
2556: my ($cmd, $tail, $client) = @_;
2557:
2558: my $userinput = "$cmd:$tail";
2559:
2560: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2561: if ($namespace ne 'roles') {
2562: chomp($what);
2563: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2564: &GDBM_WRCREAT(),"P",$what);
2565: if($hashref) {
2566: my @pairs=split(/\&/,$what);
2567: foreach my $pair (@pairs) {
2568: my ($key,$value)=split(/=/,$pair);
2569: $hashref->{$key}=$value;
2570: }
2571: if (&untie_user_hash($hashref)) {
2572: &Reply( $client, "ok\n", $userinput);
2573: } else {
2574: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2575: "while attempting put\n",
2576: $userinput);
2577: }
2578: } else {
2579: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2580: "while attempting put\n", $userinput);
2581: }
2582: } else {
2583: &Failure( $client, "refused\n", $userinput);
2584: }
2585:
2586: return 1;
2587: }
2588: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2589:
2590: # Put a piece of new data in hash, returns error if entry already exists
2591: # Parameters:
2592: # $cmd - The command that got us here.
2593: # $tail - Tail of the command (remaining parameters).
2594: # $client - File descriptor connected to client.
2595: # Returns
2596: # 0 - Requested to exit, caller should shut down.
2597: # 1 - Continue processing.
2598: #
2599: sub newput_user_profile_entry {
2600: my ($cmd, $tail, $client) = @_;
2601:
2602: my $userinput = "$cmd:$tail";
2603:
2604: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2605: if ($namespace eq 'roles') {
2606: &Failure( $client, "refused\n", $userinput);
2607: return 1;
2608: }
2609:
2610: chomp($what);
2611:
2612: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2613: &GDBM_WRCREAT(),"N",$what);
2614: if(!$hashref) {
2615: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2616: "while attempting put\n", $userinput);
2617: return 1;
2618: }
2619:
2620: my @pairs=split(/\&/,$what);
2621: foreach my $pair (@pairs) {
2622: my ($key,$value)=split(/=/,$pair);
2623: if (exists($hashref->{$key})) {
2624: &Failure($client, "key_exists: ".$key."\n",$userinput);
2625: return 1;
2626: }
2627: }
2628:
2629: foreach my $pair (@pairs) {
2630: my ($key,$value)=split(/=/,$pair);
2631: $hashref->{$key}=$value;
2632: }
2633:
2634: if (&untie_user_hash($hashref)) {
2635: &Reply( $client, "ok\n", $userinput);
2636: } else {
2637: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2638: "while attempting put\n",
2639: $userinput);
2640: }
2641: return 1;
2642: }
2643: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2644:
2645: #
2646: # Increment a profile entry in the user history file.
2647: # The history contains keyword value pairs. In this case,
2648: # The value itself is a pair of numbers. The first, the current value
2649: # the second an increment that this function applies to the current
2650: # value.
2651: #
2652: # Parameters:
2653: # $cmd - The command that got us here.
2654: # $tail - Tail of the command (remaining parameters).
2655: # $client - File descriptor connected to client.
2656: # Returns
2657: # 0 - Requested to exit, caller should shut down.
2658: # 1 - Continue processing.
2659: #
2660: sub increment_user_value_handler {
2661: my ($cmd, $tail, $client) = @_;
2662:
2663: my $userinput = "$cmd:$tail";
2664:
2665: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2666: if ($namespace ne 'roles') {
2667: chomp($what);
2668: my $hashref = &tie_user_hash($udom, $uname,
2669: $namespace, &GDBM_WRCREAT(),
2670: "P",$what);
2671: if ($hashref) {
2672: my @pairs=split(/\&/,$what);
2673: foreach my $pair (@pairs) {
2674: my ($key,$value)=split(/=/,$pair);
2675: $value = &unescape($value);
2676: # We could check that we have a number...
2677: if (! defined($value) || $value eq '') {
2678: $value = 1;
2679: }
2680: $hashref->{$key}+=$value;
2681: if ($namespace eq 'nohist_resourcetracker') {
2682: if ($hashref->{$key} < 0) {
2683: $hashref->{$key} = 0;
2684: }
2685: }
2686: }
2687: if (&untie_user_hash($hashref)) {
2688: &Reply( $client, "ok\n", $userinput);
2689: } else {
2690: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2691: "while attempting inc\n", $userinput);
2692: }
2693: } else {
2694: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2695: "while attempting inc\n", $userinput);
2696: }
2697: } else {
2698: &Failure($client, "refused\n", $userinput);
2699: }
2700:
2701: return 1;
2702: }
2703: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2704:
2705: #
2706: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2707: # Each 'role' a user has implies a set of permissions. Adding a new role
2708: # for a person grants the permissions packaged with that role
2709: # to that user when the role is selected.
2710: #
2711: # Parameters:
2712: # $cmd - The command string (rolesput).
2713: # $tail - The remainder of the request line. For rolesput this
2714: # consists of a colon separated list that contains:
2715: # The domain and user that is granting the role (logged).
2716: # The domain and user that is getting the role.
2717: # The roles being granted as a set of & separated pairs.
2718: # each pair a key value pair.
2719: # $client - File descriptor connected to the client.
2720: # Returns:
2721: # 0 - If the daemon should exit
2722: # 1 - To continue processing.
2723: #
2724: #
2725: sub roles_put_handler {
2726: my ($cmd, $tail, $client) = @_;
2727:
2728: my $userinput = "$cmd:$tail";
2729:
2730: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2731:
2732:
2733: my $namespace='roles';
2734: chomp($what);
2735: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2736: &GDBM_WRCREAT(), "P",
2737: "$exedom:$exeuser:$what");
2738: #
2739: # Log the attempt to set a role. The {}'s here ensure that the file
2740: # handle is open for the minimal amount of time. Since the flush
2741: # is done on close this improves the chances the log will be an un-
2742: # corrupted ordered thing.
2743: if ($hashref) {
2744: my $pass_entry = &get_auth_type($udom, $uname);
2745: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2746: $auth_type = $auth_type.":";
2747: my @pairs=split(/\&/,$what);
2748: foreach my $pair (@pairs) {
2749: my ($key,$value)=split(/=/,$pair);
2750: &manage_permissions($key, $udom, $uname,
2751: $auth_type);
2752: $hashref->{$key}=$value;
2753: }
2754: if (&untie_user_hash($hashref)) {
2755: &Reply($client, "ok\n", $userinput);
2756: } else {
2757: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2758: "while attempting rolesput\n", $userinput);
2759: }
2760: } else {
2761: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2762: "while attempting rolesput\n", $userinput);
2763: }
2764: return 1;
2765: }
2766: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2767:
2768: #
2769: # Deletes (removes) a role for a user. This is equivalent to removing
2770: # a permissions package associated with the role from the user's profile.
2771: #
2772: # Parameters:
2773: # $cmd - The command (rolesdel)
2774: # $tail - The remainder of the request line. This consists
2775: # of:
2776: # The domain and user requesting the change (logged)
2777: # The domain and user being changed.
2778: # The roles being revoked. These are shipped to us
2779: # as a bunch of & separated role name keywords.
2780: # $client - The file handle open on the client.
2781: # Returns:
2782: # 1 - Continue processing
2783: # 0 - Exit.
2784: #
2785: sub roles_delete_handler {
2786: my ($cmd, $tail, $client) = @_;
2787:
2788: my $userinput = "$cmd:$tail";
2789:
2790: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2791: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2792: "what = ".$what);
2793: my $namespace='roles';
2794: chomp($what);
2795: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2796: &GDBM_WRCREAT(), "D",
2797: "$exedom:$exeuser:$what");
2798:
2799: if ($hashref) {
2800: my @rolekeys=split(/\&/,$what);
2801:
2802: foreach my $key (@rolekeys) {
2803: delete $hashref->{$key};
2804: }
2805: if (&untie_user_hash($hashref)) {
2806: &Reply($client, "ok\n", $userinput);
2807: } else {
2808: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2809: "while attempting rolesdel\n", $userinput);
2810: }
2811: } else {
2812: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2813: "while attempting rolesdel\n", $userinput);
2814: }
2815:
2816: return 1;
2817: }
2818: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2819:
2820: # Unencrypted get from a user's profile database. See
2821: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2822: # This function retrieves a keyed item from a specific named database in the
2823: # user's directory.
2824: #
2825: # Parameters:
2826: # $cmd - Command request keyword (get).
2827: # $tail - Tail of the command. This is a colon separated list
2828: # consisting of the domain and username that uniquely
2829: # identifies the profile,
2830: # The 'namespace' which selects the gdbm file to
2831: # do the lookup in,
2832: # & separated list of keys to lookup. Note that
2833: # the values are returned as an & separated list too.
2834: # $client - File descriptor open on the client.
2835: # Returns:
2836: # 1 - Continue processing.
2837: # 0 - Exit.
2838: #
2839: sub get_profile_entry {
2840: my ($cmd, $tail, $client) = @_;
2841:
2842: my $userinput= "$cmd:$tail";
2843:
2844: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2845: chomp($what);
2846:
2847:
2848: my $replystring = read_profile($udom, $uname, $namespace, $what);
2849: my ($first) = split(/:/,$replystring);
2850: if($first ne "error") {
2851: &Reply($client, \$replystring, $userinput);
2852: } else {
2853: &Failure($client, $replystring." while attempting get\n", $userinput);
2854: }
2855: return 1;
2856:
2857:
2858: }
2859: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2860:
2861: #
2862: # Process the encrypted get request. Note that the request is sent
2863: # in clear, but the reply is encrypted. This is a small covert channel:
2864: # information about the sensitive keys is given to the snooper. Just not
2865: # information about the values of the sensitive key. Hmm if I wanted to
2866: # know these I'd snoop for the egets. Get the profile item names from them
2867: # and then issue a get for them since there's no enforcement of the
2868: # requirement of an encrypted get for particular profile items. If I
2869: # were re-doing this, I'd force the request to be encrypted as well as the
2870: # reply. I'd also just enforce encrypted transactions for all gets since
2871: # that would prevent any covert channel snooping.
2872: #
2873: # Parameters:
2874: # $cmd - Command keyword of request (eget).
2875: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2876: # $client - File open on the client.
2877: # Returns:
2878: # 1 - Continue processing
2879: # 0 - server should exit.
2880: sub get_profile_entry_encrypted {
2881: my ($cmd, $tail, $client) = @_;
2882:
2883: my $userinput = "$cmd:$tail";
2884:
2885: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2886: chomp($what);
2887: my $qresult = read_profile($udom, $uname, $namespace, $what);
2888: my ($first) = split(/:/, $qresult);
2889: if($first ne "error") {
2890:
2891: if ($cipher) {
2892: my $cmdlength=length($qresult);
2893: $qresult.=" ";
2894: my $encqresult='';
2895: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2896: $encqresult.= unpack("H16",
2897: $cipher->encrypt(substr($qresult,
2898: $encidx,
2899: 8)));
2900: }
2901: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2902: } else {
2903: &Failure( $client, "error:no_key\n", $userinput);
2904: }
2905: } else {
2906: &Failure($client, "$qresult while attempting eget\n", $userinput);
2907:
2908: }
2909:
2910: return 1;
2911: }
2912: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
2913:
2914: #
2915: # Deletes a key in a user profile database.
2916: #
2917: # Parameters:
2918: # $cmd - Command keyword (del).
2919: # $tail - Command tail. IN this case a colon
2920: # separated list containing:
2921: # The domain and user that identifies uniquely
2922: # the identity of the user.
2923: # The profile namespace (name of the profile
2924: # database file).
2925: # & separated list of keywords to delete.
2926: # $client - File open on client socket.
2927: # Returns:
2928: # 1 - Continue processing
2929: # 0 - Exit server.
2930: #
2931: #
2932: sub delete_profile_entry {
2933: my ($cmd, $tail, $client) = @_;
2934:
2935: my $userinput = "cmd:$tail";
2936:
2937: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2938: chomp($what);
2939: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2940: &GDBM_WRCREAT(),
2941: "D",$what);
2942: if ($hashref) {
2943: my @keys=split(/\&/,$what);
2944: foreach my $key (@keys) {
2945: delete($hashref->{$key});
2946: }
2947: if (&untie_user_hash($hashref)) {
2948: &Reply($client, "ok\n", $userinput);
2949: } else {
2950: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2951: "while attempting del\n", $userinput);
2952: }
2953: } else {
2954: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2955: "while attempting del\n", $userinput);
2956: }
2957: return 1;
2958: }
2959: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2960:
2961: #
2962: # List the set of keys that are defined in a profile database file.
2963: # A successful reply from this will contain an & separated list of
2964: # the keys.
2965: # Parameters:
2966: # $cmd - Command request (keys).
2967: # $tail - Remainder of the request, a colon separated
2968: # list containing domain/user that identifies the
2969: # user being queried, and the database namespace
2970: # (database filename essentially).
2971: # $client - File open on the client.
2972: # Returns:
2973: # 1 - Continue processing.
2974: # 0 - Exit the server.
2975: #
2976: sub get_profile_keys {
2977: my ($cmd, $tail, $client) = @_;
2978:
2979: my $userinput = "$cmd:$tail";
2980:
2981: my ($udom,$uname,$namespace)=split(/:/,$tail);
2982: my $qresult='';
2983: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2984: &GDBM_READER());
2985: if ($hashref) {
2986: foreach my $key (keys %$hashref) {
2987: $qresult.="$key&";
2988: }
2989: if (&untie_user_hash($hashref)) {
2990: $qresult=~s/\&$//;
2991: &Reply($client, \$qresult, $userinput);
2992: } else {
2993: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2994: "while attempting keys\n", $userinput);
2995: }
2996: } else {
2997: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2998: "while attempting keys\n", $userinput);
2999: }
3000:
3001: return 1;
3002: }
3003: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3004:
3005: #
3006: # Dump the contents of a user profile database.
3007: # Note that this constitutes a very large covert channel too since
3008: # the dump will return sensitive information that is not encrypted.
3009: # The naive security assumption is that the session negotiation ensures
3010: # our client is trusted and I don't believe that's assured at present.
3011: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3012: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3013: #
3014: # Parameters:
3015: # $cmd - The command request keyword (currentdump).
3016: # $tail - Remainder of the request, consisting of a colon
3017: # separated list that has the domain/username and
3018: # the namespace to dump (database file).
3019: # $client - file open on the remote client.
3020: # Returns:
3021: # 1 - Continue processing.
3022: # 0 - Exit the server.
3023: #
3024: sub dump_profile_database {
3025: my ($cmd, $tail, $client) = @_;
3026:
3027: my $userinput = "$cmd:$tail";
3028:
3029: my ($udom,$uname,$namespace) = split(/:/,$tail);
3030: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3031: &GDBM_READER());
3032: if ($hashref) {
3033: # Structure of %data:
3034: # $data{$symb}->{$parameter}=$value;
3035: # $data{$symb}->{'v.'.$parameter}=$version;
3036: # since $parameter will be unescaped, we do not
3037: # have to worry about silly parameter names...
3038:
3039: my $qresult='';
3040: my %data = (); # A hash of anonymous hashes..
3041: while (my ($key,$value) = each(%$hashref)) {
3042: my ($v,$symb,$param) = split(/:/,$key);
3043: next if ($v eq 'version' || $symb eq 'keys');
3044: next if (exists($data{$symb}) &&
3045: exists($data{$symb}->{$param}) &&
3046: $data{$symb}->{'v.'.$param} > $v);
3047: $data{$symb}->{$param}=$value;
3048: $data{$symb}->{'v.'.$param}=$v;
3049: }
3050: if (&untie_user_hash($hashref)) {
3051: while (my ($symb,$param_hash) = each(%data)) {
3052: while(my ($param,$value) = each (%$param_hash)){
3053: next if ($param =~ /^v\./); # Ignore versions...
3054: #
3055: # Just dump the symb=value pairs separated by &
3056: #
3057: $qresult.=$symb.':'.$param.'='.$value.'&';
3058: }
3059: }
3060: chop($qresult);
3061: &Reply($client , \$qresult, $userinput);
3062: } else {
3063: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3064: "while attempting currentdump\n", $userinput);
3065: }
3066: } else {
3067: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3068: "while attempting currentdump\n", $userinput);
3069: }
3070:
3071: return 1;
3072: }
3073: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3074:
3075: #
3076: # Dump a profile database with an optional regular expression
3077: # to match against the keys. In this dump, no effort is made
3078: # to separate symb from version information. Presumably the
3079: # databases that are dumped by this command are of a different
3080: # structure. Need to look at this and improve the documentation of
3081: # both this and the currentdump handler.
3082: # Parameters:
3083: # $cmd - The command keyword.
3084: # $tail - All of the characters after the $cmd:
3085: # These are expected to be a colon
3086: # separated list containing:
3087: # domain/user - identifying the user.
3088: # namespace - identifying the database.
3089: # regexp - optional regular expression
3090: # that is matched against
3091: # database keywords to do
3092: # selective dumps.
3093: # $client - Channel open on the client.
3094: # Returns:
3095: # 1 - Continue processing.
3096: # Side effects:
3097: # response is written to $client.
3098: #
3099: sub dump_with_regexp {
3100: my ($cmd, $tail, $client) = @_;
3101:
3102:
3103: my $userinput = "$cmd:$tail";
3104:
3105: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
3106: if (defined($regexp)) {
3107: $regexp=&unescape($regexp);
3108: } else {
3109: $regexp='.';
3110: }
3111: my ($start,$end);
3112: if (defined($range)) {
3113: if ($range =~/^(\d+)\-(\d+)$/) {
3114: ($start,$end) = ($1,$2);
3115: } elsif ($range =~/^(\d+)$/) {
3116: ($start,$end) = (0,$1);
3117: } else {
3118: undef($range);
3119: }
3120: }
3121: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3122: &GDBM_READER());
3123: if ($hashref) {
3124: my $qresult='';
3125: my $count=0;
3126: while (my ($key,$value) = each(%$hashref)) {
3127: if ($namespace eq 'roles') {
3128: if ($key =~ /^($LONCAPA::match_domain)_($LONCAPA::match_community)_(cc|co|in|ta|ep|ad|st|cr)/) {
3129: if ($clientversion =~ /^(\d+)\.(\d+)$/) {
3130: my $major = $1;
3131: my $minor = $2;
3132: next if (($major < 2) || (($major == 2) && ($minor < 10)));
3133: }
3134: }
3135: }
3136: if ($regexp eq '.') {
3137: $count++;
3138: if (defined($range) && $count >= $end) { last; }
3139: if (defined($range) && $count < $start) { next; }
3140: $qresult.=$key.'='.$value.'&';
3141: } else {
3142: my $unescapeKey = &unescape($key);
3143: if (eval('$unescapeKey=~/$regexp/')) {
3144: $count++;
3145: if (defined($range) && $count >= $end) { last; }
3146: if (defined($range) && $count < $start) { next; }
3147: $qresult.="$key=$value&";
3148: }
3149: }
3150: }
3151: if (&untie_user_hash($hashref)) {
3152: chop($qresult);
3153: &Reply($client, \$qresult, $userinput);
3154: } else {
3155: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3156: "while attempting dump\n", $userinput);
3157: }
3158: } else {
3159: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3160: "while attempting dump\n", $userinput);
3161: }
3162:
3163: return 1;
3164: }
3165: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3166:
3167: # Store a set of key=value pairs associated with a versioned name.
3168: #
3169: # Parameters:
3170: # $cmd - Request command keyword.
3171: # $tail - Tail of the request. This is a colon
3172: # separated list containing:
3173: # domain/user - User and authentication domain.
3174: # namespace - Name of the database being modified
3175: # rid - Resource keyword to modify.
3176: # what - new value associated with rid.
3177: #
3178: # $client - Socket open on the client.
3179: #
3180: #
3181: # Returns:
3182: # 1 (keep on processing).
3183: # Side-Effects:
3184: # Writes to the client
3185: sub store_handler {
3186: my ($cmd, $tail, $client) = @_;
3187:
3188: my $userinput = "$cmd:$tail";
3189:
3190: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3191: if ($namespace ne 'roles') {
3192:
3193: chomp($what);
3194: my @pairs=split(/\&/,$what);
3195: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3196: &GDBM_WRCREAT(), "S",
3197: "$rid:$what");
3198: if ($hashref) {
3199: my $now = time;
3200: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3201: my $key;
3202: $hashref->{"version:$rid"}++;
3203: my $version=$hashref->{"version:$rid"};
3204: my $allkeys='';
3205: foreach my $pair (@pairs) {
3206: my ($key,$value)=split(/=/,$pair);
3207: $allkeys.=$key.':';
3208: $hashref->{"$version:$rid:$key"}=$value;
3209: }
3210: $hashref->{"$version:$rid:timestamp"}=$now;
3211: $allkeys.='timestamp';
3212: $hashref->{"$version:keys:$rid"}=$allkeys;
3213: if (&untie_user_hash($hashref)) {
3214: &Reply($client, "ok\n", $userinput);
3215: } else {
3216: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3217: "while attempting store\n", $userinput);
3218: }
3219: } else {
3220: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3221: "while attempting store\n", $userinput);
3222: }
3223: } else {
3224: &Failure($client, "refused\n", $userinput);
3225: }
3226:
3227: return 1;
3228: }
3229: ®ister_handler("store", \&store_handler, 0, 1, 0);
3230:
3231: # Modify a set of key=value pairs associated with a versioned name.
3232: #
3233: # Parameters:
3234: # $cmd - Request command keyword.
3235: # $tail - Tail of the request. This is a colon
3236: # separated list containing:
3237: # domain/user - User and authentication domain.
3238: # namespace - Name of the database being modified
3239: # rid - Resource keyword to modify.
3240: # v - Version item to modify
3241: # what - new value associated with rid.
3242: #
3243: # $client - Socket open on the client.
3244: #
3245: #
3246: # Returns:
3247: # 1 (keep on processing).
3248: # Side-Effects:
3249: # Writes to the client
3250: sub putstore_handler {
3251: my ($cmd, $tail, $client) = @_;
3252:
3253: my $userinput = "$cmd:$tail";
3254:
3255: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3256: if ($namespace ne 'roles') {
3257:
3258: chomp($what);
3259: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3260: &GDBM_WRCREAT(), "M",
3261: "$rid:$v:$what");
3262: if ($hashref) {
3263: my $now = time;
3264: my %data = &hash_extract($what);
3265: my @allkeys;
3266: while (my($key,$value) = each(%data)) {
3267: push(@allkeys,$key);
3268: $hashref->{"$v:$rid:$key"} = $value;
3269: }
3270: my $allkeys = join(':',@allkeys);
3271: $hashref->{"$v:keys:$rid"}=$allkeys;
3272:
3273: if (&untie_user_hash($hashref)) {
3274: &Reply($client, "ok\n", $userinput);
3275: } else {
3276: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3277: "while attempting store\n", $userinput);
3278: }
3279: } else {
3280: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3281: "while attempting store\n", $userinput);
3282: }
3283: } else {
3284: &Failure($client, "refused\n", $userinput);
3285: }
3286:
3287: return 1;
3288: }
3289: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3290:
3291: sub hash_extract {
3292: my ($str)=@_;
3293: my %hash;
3294: foreach my $pair (split(/\&/,$str)) {
3295: my ($key,$value)=split(/=/,$pair);
3296: $hash{$key}=$value;
3297: }
3298: return (%hash);
3299: }
3300: sub hash_to_str {
3301: my ($hash_ref)=@_;
3302: my $str;
3303: foreach my $key (keys(%$hash_ref)) {
3304: $str.=$key.'='.$hash_ref->{$key}.'&';
3305: }
3306: $str=~s/\&$//;
3307: return $str;
3308: }
3309:
3310: #
3311: # Dump out all versions of a resource that has key=value pairs associated
3312: # with it for each version. These resources are built up via the store
3313: # command.
3314: #
3315: # Parameters:
3316: # $cmd - Command keyword.
3317: # $tail - Remainder of the request which consists of:
3318: # domain/user - User and auth. domain.
3319: # namespace - name of resource database.
3320: # rid - Resource id.
3321: # $client - socket open on the client.
3322: #
3323: # Returns:
3324: # 1 indicating the caller should not yet exit.
3325: # Side-effects:
3326: # Writes a reply to the client.
3327: # The reply is a string of the following shape:
3328: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3329: # Where the 1 above represents version 1.
3330: # this continues for all pairs of keys in all versions.
3331: #
3332: #
3333: #
3334: #
3335: sub restore_handler {
3336: my ($cmd, $tail, $client) = @_;
3337:
3338: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3339: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3340: $namespace=~s/\//\_/g;
3341: $namespace = &LONCAPA::clean_username($namespace);
3342:
3343: chomp($rid);
3344: my $qresult='';
3345: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3346: if ($hashref) {
3347: my $version=$hashref->{"version:$rid"};
3348: $qresult.="version=$version&";
3349: my $scope;
3350: for ($scope=1;$scope<=$version;$scope++) {
3351: my $vkeys=$hashref->{"$scope:keys:$rid"};
3352: my @keys=split(/:/,$vkeys);
3353: my $key;
3354: $qresult.="$scope:keys=$vkeys&";
3355: foreach $key (@keys) {
3356: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3357: }
3358: }
3359: if (&untie_user_hash($hashref)) {
3360: $qresult=~s/\&$//;
3361: &Reply( $client, \$qresult, $userinput);
3362: } else {
3363: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3364: "while attempting restore\n", $userinput);
3365: }
3366: } else {
3367: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3368: "while attempting restore\n", $userinput);
3369: }
3370:
3371: return 1;
3372:
3373:
3374: }
3375: ®ister_handler("restore", \&restore_handler, 0,1,0);
3376:
3377: #
3378: # Add a chat message to a synchronous discussion board.
3379: #
3380: # Parameters:
3381: # $cmd - Request keyword.
3382: # $tail - Tail of the command. A colon separated list
3383: # containing:
3384: # cdom - Domain on which the chat board lives
3385: # cnum - Course containing the chat board.
3386: # newpost - Body of the posting.
3387: # group - Optional group, if chat board is only
3388: # accessible in a group within the course
3389: # $client - Socket open on the client.
3390: # Returns:
3391: # 1 - Indicating caller should keep on processing.
3392: #
3393: # Side-effects:
3394: # writes a reply to the client.
3395: #
3396: #
3397: sub send_chat_handler {
3398: my ($cmd, $tail, $client) = @_;
3399:
3400:
3401: my $userinput = "$cmd:$tail";
3402:
3403: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3404: &chat_add($cdom,$cnum,$newpost,$group);
3405: &Reply($client, "ok\n", $userinput);
3406:
3407: return 1;
3408: }
3409: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3410:
3411: #
3412: # Retrieve the set of chat messages from a discussion board.
3413: #
3414: # Parameters:
3415: # $cmd - Command keyword that initiated the request.
3416: # $tail - Remainder of the request after the command
3417: # keyword. In this case a colon separated list of
3418: # chat domain - Which discussion board.
3419: # chat id - Discussion thread(?)
3420: # domain/user - Authentication domain and username
3421: # of the requesting person.
3422: # group - Optional course group containing
3423: # the board.
3424: # $client - Socket open on the client program.
3425: # Returns:
3426: # 1 - continue processing
3427: # Side effects:
3428: # Response is written to the client.
3429: #
3430: sub retrieve_chat_handler {
3431: my ($cmd, $tail, $client) = @_;
3432:
3433:
3434: my $userinput = "$cmd:$tail";
3435:
3436: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3437: my $reply='';
3438: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3439: $reply.=&escape($_).':';
3440: }
3441: $reply=~s/\:$//;
3442: &Reply($client, \$reply, $userinput);
3443:
3444:
3445: return 1;
3446: }
3447: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3448:
3449: #
3450: # Initiate a query of an sql database. SQL query repsonses get put in
3451: # a file for later retrieval. This prevents sql query results from
3452: # bottlenecking the system. Note that with loncnew, perhaps this is
3453: # less of an issue since multiple outstanding requests can be concurrently
3454: # serviced.
3455: #
3456: # Parameters:
3457: # $cmd - COmmand keyword that initiated the request.
3458: # $tail - Remainder of the command after the keyword.
3459: # For this function, this consists of a query and
3460: # 3 arguments that are self-documentingly labelled
3461: # in the original arg1, arg2, arg3.
3462: # $client - Socket open on the client.
3463: # Return:
3464: # 1 - Indicating processing should continue.
3465: # Side-effects:
3466: # a reply is written to $client.
3467: #
3468: sub send_query_handler {
3469: my ($cmd, $tail, $client) = @_;
3470:
3471:
3472: my $userinput = "$cmd:$tail";
3473:
3474: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3475: $query=~s/\n*$//g;
3476: &Reply($client, "". &sql_reply("$clientname\&$query".
3477: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3478: $userinput);
3479:
3480: return 1;
3481: }
3482: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3483:
3484: #
3485: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3486: # The query is submitted via a "querysend" transaction.
3487: # There it is passed on to the lonsql daemon, queued and issued to
3488: # mysql.
3489: # This transaction is invoked when the sql transaction is complete
3490: # it stores the query results in flie and indicates query completion.
3491: # presumably local software then fetches this response... I'm guessing
3492: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3493: # lonsql on completion of the query interacts with the lond of our
3494: # client to do a query reply storing two files:
3495: # - id - The results of the query.
3496: # - id.end - Indicating the transaction completed.
3497: # NOTE: id is a unique id assigned to the query and querysend time.
3498: # Parameters:
3499: # $cmd - Command keyword that initiated this request.
3500: # $tail - Remainder of the tail. In this case that's a colon
3501: # separated list containing the query Id and the
3502: # results of the query.
3503: # $client - Socket open on the client.
3504: # Return:
3505: # 1 - Indicating that we should continue processing.
3506: # Side effects:
3507: # ok written to the client.
3508: #
3509: sub reply_query_handler {
3510: my ($cmd, $tail, $client) = @_;
3511:
3512:
3513: my $userinput = "$cmd:$tail";
3514:
3515: my ($id,$reply)=split(/:/,$tail);
3516: my $store;
3517: my $execdir=$perlvar{'lonDaemons'};
3518: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3519: $reply=~s/\&/\n/g;
3520: print $store $reply;
3521: close $store;
3522: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3523: print $store2 "done\n";
3524: close $store2;
3525: &Reply($client, "ok\n", $userinput);
3526: } else {
3527: &Failure($client, "error: ".($!+0)
3528: ." IO::File->new Failed ".
3529: "while attempting queryreply\n", $userinput);
3530: }
3531:
3532:
3533: return 1;
3534: }
3535: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3536:
3537: #
3538: # Process the courseidput request. Not quite sure what this means
3539: # at the system level sense. It appears a gdbm file in the
3540: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3541: # a set of entries made in that database.
3542: #
3543: # Parameters:
3544: # $cmd - The command keyword that initiated this request.
3545: # $tail - Tail of the command. In this case consists of a colon
3546: # separated list contaning the domain to apply this to and
3547: # an ampersand separated list of keyword=value pairs.
3548: # Each value is a colon separated list that includes:
3549: # description, institutional code and course owner.
3550: # For backward compatibility with versions included
3551: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3552: # code and/or course owner are preserved from the existing
3553: # record when writing a new record in response to 1.1 or
3554: # 1.2 implementations of lonnet::flushcourselogs().
3555: #
3556: # $client - Socket open on the client.
3557: # Returns:
3558: # 1 - indicating that processing should continue
3559: #
3560: # Side effects:
3561: # reply is written to the client.
3562: #
3563: sub put_course_id_handler {
3564: my ($cmd, $tail, $client) = @_;
3565:
3566:
3567: my $userinput = "$cmd:$tail";
3568:
3569: my ($udom, $what) = split(/:/, $tail,2);
3570: chomp($what);
3571: my $now=time;
3572: my @pairs=split(/\&/,$what);
3573:
3574: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3575: if ($hashref) {
3576: foreach my $pair (@pairs) {
3577: my ($key,$courseinfo) = split(/=/,$pair,2);
3578: $courseinfo =~ s/=/:/g;
3579: if (defined($hashref->{$key})) {
3580: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3581: if (ref($value) eq 'HASH') {
3582: my @items = ('description','inst_code','owner','type');
3583: my @new_items = split(/:/,$courseinfo,-1);
3584: my %storehash;
3585: for (my $i=0; $i<@new_items; $i++) {
3586: $storehash{$items[$i]} = &unescape($new_items[$i]);
3587: }
3588: $hashref->{$key} =
3589: &Apache::lonnet::freeze_escape(\%storehash);
3590: my $unesc_key = &unescape($key);
3591: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3592: next;
3593: }
3594: }
3595: my @current_items = split(/:/,$hashref->{$key},-1);
3596: shift(@current_items); # remove description
3597: pop(@current_items); # remove last access
3598: my $numcurrent = scalar(@current_items);
3599: if ($numcurrent > 3) {
3600: $numcurrent = 3;
3601: }
3602: my @new_items = split(/:/,$courseinfo,-1);
3603: my $numnew = scalar(@new_items);
3604: if ($numcurrent > 0) {
3605: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3606: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3607: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3608: }
3609: }
3610: }
3611: $hashref->{$key}=$courseinfo.':'.$now;
3612: }
3613: if (&untie_domain_hash($hashref)) {
3614: &Reply( $client, "ok\n", $userinput);
3615: } else {
3616: &Failure($client, "error: ".($!+0)
3617: ." untie(GDBM) Failed ".
3618: "while attempting courseidput\n", $userinput);
3619: }
3620: } else {
3621: &Failure($client, "error: ".($!+0)
3622: ." tie(GDBM) Failed ".
3623: "while attempting courseidput\n", $userinput);
3624: }
3625:
3626: return 1;
3627: }
3628: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3629:
3630: sub put_course_id_hash_handler {
3631: my ($cmd, $tail, $client) = @_;
3632: my $userinput = "$cmd:$tail";
3633: my ($udom,$mode,$what) = split(/:/, $tail,3);
3634: chomp($what);
3635: my $now=time;
3636: my @pairs=split(/\&/,$what);
3637: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3638: if ($hashref) {
3639: foreach my $pair (@pairs) {
3640: my ($key,$value)=split(/=/,$pair);
3641: my $unesc_key = &unescape($key);
3642: if ($mode ne 'timeonly') {
3643: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3644: my $curritems = &Apache::lonnet::thaw_unescape($key);
3645: if (ref($curritems) ne 'HASH') {
3646: my @current_items = split(/:/,$hashref->{$key},-1);
3647: my $lasttime = pop(@current_items);
3648: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3649: } else {
3650: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3651: }
3652: }
3653: $hashref->{$key} = $value;
3654: }
3655: if ($mode ne 'notime') {
3656: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3657: }
3658: }
3659: if (&untie_domain_hash($hashref)) {
3660: &Reply($client, "ok\n", $userinput);
3661: } else {
3662: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3663: "while attempting courseidputhash\n", $userinput);
3664: }
3665: } else {
3666: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3667: "while attempting courseidputhash\n", $userinput);
3668: }
3669: return 1;
3670: }
3671: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3672:
3673: # Retrieves the value of a course id resource keyword pattern
3674: # defined since a starting date. Both the starting date and the
3675: # keyword pattern are optional. If the starting date is not supplied it
3676: # is treated as the beginning of time. If the pattern is not found,
3677: # it is treatred as "." matching everything.
3678: #
3679: # Parameters:
3680: # $cmd - Command keyword that resulted in us being dispatched.
3681: # $tail - The remainder of the command that, in this case, consists
3682: # of a colon separated list of:
3683: # domain - The domain in which the course database is
3684: # defined.
3685: # since - Optional parameter describing the minimum
3686: # time of definition(?) of the resources that
3687: # will match the dump.
3688: # description - regular expression that is used to filter
3689: # the dump. Only keywords matching this regexp
3690: # will be used.
3691: # institutional code - optional supplied code to filter
3692: # the dump. Only courses with an institutional code
3693: # that match the supplied code will be returned.
3694: # owner - optional supplied username and domain of owner to
3695: # filter the dump. Only courses for which the course
3696: # owner matches the supplied username and/or domain
3697: # will be returned. Pre-2.2.0 legacy entries from
3698: # nohist_courseiddump will only contain usernames.
3699: # type - optional parameter for selection
3700: # regexp_ok - if 1 or -1 allow the supplied institutional code
3701: # filter to behave as a regular expression:
3702: # 1 will not exclude the course if the instcode matches the RE
3703: # -1 will exclude the course if the instcode matches the RE
3704: # rtn_as_hash - whether to return the information available for
3705: # each matched item as a frozen hash of all
3706: # key, value pairs in the item's hash, or as a
3707: # colon-separated list of (in order) description,
3708: # institutional code, and course owner.
3709: # selfenrollonly - filter by courses allowing self-enrollment
3710: # now or in the future (selfenrollonly = 1).
3711: # catfilter - filter by course category, assigned to a course
3712: # using manually defined categories (i.e., not
3713: # self-cataloging based on on institutional code).
3714: # showhidden - include course in results even if course
3715: # was set to be excluded from course catalog (DC only).
3716: # caller - if set to 'coursecatalog', courses set to be hidden
3717: # from course catalog will be excluded from results (unless
3718: # overridden by "showhidden".
3719: # cloner - escaped username:domain of course cloner (if picking course to
3720: # clone).
3721: # cc_clone_list - escaped comma separated list of courses for which
3722: # course cloner has active CC role (and so can clone
3723: # automatically).
3724: # cloneonly - filter by courses for which cloner has rights to clone.
3725: # createdbefore - include courses for which creation date preceeded this date.
3726: # createdafter - include courses for which creation date followed this date.
3727: # creationcontext - include courses created in specified context
3728: #
3729: # $client - The socket open on the client.
3730: # Returns:
3731: # 1 - Continue processing.
3732: # Side Effects:
3733: # a reply is written to $client.
3734: sub dump_course_id_handler {
3735: my ($cmd, $tail, $client) = @_;
3736: my $userinput = "$cmd:$tail";
3737:
3738: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3739: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
3740: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
3741: $creationcontext) =split(/:/,$tail);
3742: my $now = time;
3743: my ($cloneruname,$clonerudom,%cc_clone);
3744: if (defined($description)) {
3745: $description=&unescape($description);
3746: } else {
3747: $description='.';
3748: }
3749: if (defined($instcodefilter)) {
3750: $instcodefilter=&unescape($instcodefilter);
3751: } else {
3752: $instcodefilter='.';
3753: }
3754: my ($ownerunamefilter,$ownerdomfilter);
3755: if (defined($ownerfilter)) {
3756: $ownerfilter=&unescape($ownerfilter);
3757: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3758: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3759: $ownerunamefilter = $1;
3760: $ownerdomfilter = $2;
3761: } else {
3762: $ownerunamefilter = $ownerfilter;
3763: $ownerdomfilter = '';
3764: }
3765: }
3766: } else {
3767: $ownerfilter='.';
3768: }
3769:
3770: if (defined($coursefilter)) {
3771: $coursefilter=&unescape($coursefilter);
3772: } else {
3773: $coursefilter='.';
3774: }
3775: if (defined($typefilter)) {
3776: $typefilter=&unescape($typefilter);
3777: } else {
3778: $typefilter='.';
3779: }
3780: if (defined($regexp_ok)) {
3781: $regexp_ok=&unescape($regexp_ok);
3782: }
3783: if (defined($catfilter)) {
3784: $catfilter=&unescape($catfilter);
3785: }
3786: if (defined($cloner)) {
3787: $cloner = &unescape($cloner);
3788: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
3789: }
3790: if (defined($cc_clone_list)) {
3791: $cc_clone_list = &unescape($cc_clone_list);
3792: my @cc_cloners = split('&',$cc_clone_list);
3793: foreach my $cid (@cc_cloners) {
3794: my ($clonedom,$clonenum) = split(':',$cid);
3795: next if ($clonedom ne $udom);
3796: $cc_clone{$clonedom.'_'.$clonenum} = 1;
3797: }
3798: }
3799: if ($createdbefore ne '') {
3800: $createdbefore = &unescape($createdbefore);
3801: } else {
3802: $createdbefore = 0;
3803: }
3804: if ($createdafter ne '') {
3805: $createdafter = &unescape($createdafter);
3806: } else {
3807: $createdafter = 0;
3808: }
3809: if ($creationcontext ne '') {
3810: $creationcontext = &unescape($creationcontext);
3811: } else {
3812: $creationcontext = '.';
3813: }
3814:
3815: my $unpack = 1;
3816: if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&
3817: $typefilter eq '.') {
3818: $unpack = 0;
3819: }
3820: if (!defined($since)) { $since=0; }
3821: my $qresult='';
3822: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3823: if ($hashref) {
3824: while (my ($key,$value) = each(%$hashref)) {
3825: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
3826: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
3827: $context);
3828: $unesc_key = &unescape($key);
3829: if ($unesc_key =~ /^lasttime:/) {
3830: next;
3831: } else {
3832: $lasttime_key = &escape('lasttime:'.$unesc_key);
3833: }
3834: if ($hashref->{$lasttime_key} ne '') {
3835: $lasttime = $hashref->{$lasttime_key};
3836: next if ($lasttime<$since);
3837: }
3838: my ($canclone,$valchange);
3839: my $items = &Apache::lonnet::thaw_unescape($value);
3840: if (ref($items) eq 'HASH') {
3841: if ($hashref->{$lasttime_key} eq '') {
3842: next if ($since > 1);
3843: }
3844: $is_hash = 1;
3845: if (defined($clonerudom)) {
3846: if ($items->{'cloners'}) {
3847: my @cloneable = split(',',$items->{'cloners'});
3848: if (@cloneable) {
3849: if (grep(/^\*$/,@cloneable)) {
3850: $canclone = 1;
3851: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
3852: $canclone = 1;
3853: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
3854: $canclone = 1;
3855: }
3856: }
3857: unless ($canclone) {
3858: if ($cloneruname ne '' && $clonerudom ne '') {
3859: if ($cc_clone{$unesc_key}) {
3860: $canclone = 1;
3861: $items->{'cloners'} .= ','.$cloneruname.':'.
3862: $clonerudom;
3863: $valchange = 1;
3864: }
3865: }
3866: }
3867: } elsif (defined($cloneruname)) {
3868: if ($cc_clone{$unesc_key}) {
3869: $canclone = 1;
3870: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3871: $valchange = 1;
3872: }
3873: }
3874: }
3875: if ($unpack || !$rtn_as_hash) {
3876: $unesc_val{'descr'} = $items->{'description'};
3877: $unesc_val{'inst_code'} = $items->{'inst_code'};
3878: $unesc_val{'owner'} = $items->{'owner'};
3879: $unesc_val{'type'} = $items->{'type'};
3880: $unesc_val{'cloners'} = $items->{'cloners'};
3881: $unesc_val{'created'} = $items->{'created'};
3882: $unesc_val{'context'} = $items->{'context'};
3883: }
3884: $selfenroll_types = $items->{'selfenroll_types'};
3885: $selfenroll_end = $items->{'selfenroll_end_date'};
3886: $created = $items->{'created'};
3887: $context = $items->{'context'};
3888: if ($selfenrollonly) {
3889: next if (!$selfenroll_types);
3890: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
3891: next;
3892: }
3893: }
3894: if ($creationcontext ne '.') {
3895: next if (($context ne '') && ($context ne $creationcontext));
3896: }
3897: if ($createdbefore > 0) {
3898: next if (($created eq '') || ($created > $createdbefore));
3899: }
3900: if ($createdafter > 0) {
3901: next if (($created eq '') || ($created <= $createdafter));
3902: }
3903: if ($catfilter ne '') {
3904: next if ($items->{'categories'} eq '');
3905: my @categories = split('&',$items->{'categories'});
3906: next if (@categories == 0);
3907: my @subcats = split('&',$catfilter);
3908: my $matchcat = 0;
3909: foreach my $cat (@categories) {
3910: if (grep(/^\Q$cat\E$/,@subcats)) {
3911: $matchcat = 1;
3912: last;
3913: }
3914: }
3915: next if (!$matchcat);
3916: }
3917: if ($caller eq 'coursecatalog') {
3918: if ($items->{'hidefromcat'} eq 'yes') {
3919: next if !$showhidden;
3920: }
3921: }
3922: } else {
3923: next if ($catfilter ne '');
3924: next if ($selfenrollonly);
3925: next if ($createdbefore || $createdafter);
3926: next if ($creationcontext ne '.');
3927: if ((defined($clonerudom)) && (defined($cloneruname))) {
3928: if ($cc_clone{$unesc_key}) {
3929: $canclone = 1;
3930: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
3931: }
3932: }
3933: $is_hash = 0;
3934: my @courseitems = split(/:/,$value);
3935: $lasttime = pop(@courseitems);
3936: if ($hashref->{$lasttime_key} eq '') {
3937: next if ($lasttime<$since);
3938: }
3939: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
3940: }
3941: if ($cloneonly) {
3942: next unless ($canclone);
3943: }
3944: my $match = 1;
3945: if ($description ne '.') {
3946: if (!$is_hash) {
3947: $unesc_val{'descr'} = &unescape($val{'descr'});
3948: }
3949: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
3950: $match = 0;
3951: }
3952: }
3953: if ($instcodefilter ne '.') {
3954: if (!$is_hash) {
3955: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
3956: }
3957: if ($regexp_ok == 1) {
3958: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
3959: $match = 0;
3960: }
3961: } elsif ($regexp_ok == -1) {
3962: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
3963: $match = 0;
3964: }
3965: } else {
3966: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
3967: $match = 0;
3968: }
3969: }
3970: }
3971: if ($ownerfilter ne '.') {
3972: if (!$is_hash) {
3973: $unesc_val{'owner'} = &unescape($val{'owner'});
3974: }
3975: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
3976: if ($unesc_val{'owner'} =~ /:/) {
3977: if (eval{$unesc_val{'owner'} !~
3978: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
3979: $match = 0;
3980: }
3981: } else {
3982: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
3983: $match = 0;
3984: }
3985: }
3986: } elsif ($ownerunamefilter ne '') {
3987: if ($unesc_val{'owner'} =~ /:/) {
3988: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
3989: $match = 0;
3990: }
3991: } else {
3992: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
3993: $match = 0;
3994: }
3995: }
3996: } elsif ($ownerdomfilter ne '') {
3997: if ($unesc_val{'owner'} =~ /:/) {
3998: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
3999: $match = 0;
4000: }
4001: } else {
4002: if ($ownerdomfilter ne $udom) {
4003: $match = 0;
4004: }
4005: }
4006: }
4007: }
4008: if ($coursefilter ne '.') {
4009: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4010: $match = 0;
4011: }
4012: }
4013: if ($typefilter ne '.') {
4014: if (!$is_hash) {
4015: $unesc_val{'type'} = &unescape($val{'type'});
4016: }
4017: if ($unesc_val{'type'} eq '') {
4018: if ($typefilter ne 'Course') {
4019: $match = 0;
4020: }
4021: } else {
4022: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4023: $match = 0;
4024: }
4025: }
4026: }
4027: if ($match == 1) {
4028: if ($rtn_as_hash) {
4029: if ($is_hash) {
4030: if ($valchange) {
4031: my $newvalue = &Apache::lonnet::freeze_escape($items);
4032: $qresult.=$key.'='.$newvalue.'&';
4033: } else {
4034: $qresult.=$key.'='.$value.'&';
4035: }
4036: } else {
4037: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4038: 'inst_code' => &unescape($val{'inst_code'}),
4039: 'owner' => &unescape($val{'owner'}),
4040: 'type' => &unescape($val{'type'}),
4041: 'cloners' => &unescape($val{'cloners'}),
4042: );
4043: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4044: $qresult.=$key.'='.$items.'&';
4045: }
4046: } else {
4047: if ($is_hash) {
4048: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4049: &escape($unesc_val{'inst_code'}).':'.
4050: &escape($unesc_val{'owner'}).'&';
4051: } else {
4052: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4053: ':'.$val{'owner'}.'&';
4054: }
4055: }
4056: }
4057: }
4058: if (&untie_domain_hash($hashref)) {
4059: chop($qresult);
4060: &Reply($client, \$qresult, $userinput);
4061: } else {
4062: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4063: "while attempting courseiddump\n", $userinput);
4064: }
4065: } else {
4066: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4067: "while attempting courseiddump\n", $userinput);
4068: }
4069: return 1;
4070: }
4071: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4072:
4073: #
4074: # Puts an unencrypted entry in a namespace db file at the domain level
4075: #
4076: # Parameters:
4077: # $cmd - The command that got us here.
4078: # $tail - Tail of the command (remaining parameters).
4079: # $client - File descriptor connected to client.
4080: # Returns
4081: # 0 - Requested to exit, caller should shut down.
4082: # 1 - Continue processing.
4083: # Side effects:
4084: # reply is written to $client.
4085: #
4086: sub put_domain_handler {
4087: my ($cmd,$tail,$client) = @_;
4088:
4089: my $userinput = "$cmd:$tail";
4090:
4091: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4092: chomp($what);
4093: my @pairs=split(/\&/,$what);
4094: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4095: "P", $what);
4096: if ($hashref) {
4097: foreach my $pair (@pairs) {
4098: my ($key,$value)=split(/=/,$pair);
4099: $hashref->{$key}=$value;
4100: }
4101: if (&untie_domain_hash($hashref)) {
4102: &Reply($client, "ok\n", $userinput);
4103: } else {
4104: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4105: "while attempting putdom\n", $userinput);
4106: }
4107: } else {
4108: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4109: "while attempting putdom\n", $userinput);
4110: }
4111:
4112: return 1;
4113: }
4114: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4115:
4116: # Unencrypted get from the namespace database file at the domain level.
4117: # This function retrieves a keyed item from a specific named database in the
4118: # domain directory.
4119: #
4120: # Parameters:
4121: # $cmd - Command request keyword (get).
4122: # $tail - Tail of the command. This is a colon separated list
4123: # consisting of the domain and the 'namespace'
4124: # which selects the gdbm file to do the lookup in,
4125: # & separated list of keys to lookup. Note that
4126: # the values are returned as an & separated list too.
4127: # $client - File descriptor open on the client.
4128: # Returns:
4129: # 1 - Continue processing.
4130: # 0 - Exit.
4131: # Side effects:
4132: # reply is written to $client.
4133: #
4134:
4135: sub get_domain_handler {
4136: my ($cmd, $tail, $client) = @_;
4137:
4138: my $userinput = "$client:$tail";
4139:
4140: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4141: chomp($what);
4142: my @queries=split(/\&/,$what);
4143: my $qresult='';
4144: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4145: if ($hashref) {
4146: for (my $i=0;$i<=$#queries;$i++) {
4147: $qresult.="$hashref->{$queries[$i]}&";
4148: }
4149: if (&untie_domain_hash($hashref)) {
4150: $qresult=~s/\&$//;
4151: &Reply($client, \$qresult, $userinput);
4152: } else {
4153: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4154: "while attempting getdom\n",$userinput);
4155: }
4156: } else {
4157: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4158: "while attempting getdom\n",$userinput);
4159: }
4160:
4161: return 1;
4162: }
4163: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4164:
4165: #
4166: # Puts an id to a domains id database.
4167: #
4168: # Parameters:
4169: # $cmd - The command that triggered us.
4170: # $tail - Remainder of the request other than the command. This is a
4171: # colon separated list containing:
4172: # $domain - The domain for which we are writing the id.
4173: # $pairs - The id info to write... this is and & separated list
4174: # of keyword=value.
4175: # $client - Socket open on the client.
4176: # Returns:
4177: # 1 - Continue processing.
4178: # Side effects:
4179: # reply is written to $client.
4180: #
4181: sub put_id_handler {
4182: my ($cmd,$tail,$client) = @_;
4183:
4184:
4185: my $userinput = "$cmd:$tail";
4186:
4187: my ($udom,$what)=split(/:/,$tail);
4188: chomp($what);
4189: my @pairs=split(/\&/,$what);
4190: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4191: "P", $what);
4192: if ($hashref) {
4193: foreach my $pair (@pairs) {
4194: my ($key,$value)=split(/=/,$pair);
4195: $hashref->{$key}=$value;
4196: }
4197: if (&untie_domain_hash($hashref)) {
4198: &Reply($client, "ok\n", $userinput);
4199: } else {
4200: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4201: "while attempting idput\n", $userinput);
4202: }
4203: } else {
4204: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4205: "while attempting idput\n", $userinput);
4206: }
4207:
4208: return 1;
4209: }
4210: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4211:
4212: #
4213: # Retrieves a set of id values from the id database.
4214: # Returns an & separated list of results, one for each requested id to the
4215: # client.
4216: #
4217: # Parameters:
4218: # $cmd - Command keyword that caused us to be dispatched.
4219: # $tail - Tail of the command. Consists of a colon separated:
4220: # domain - the domain whose id table we dump
4221: # ids Consists of an & separated list of
4222: # id keywords whose values will be fetched.
4223: # nonexisting keywords will have an empty value.
4224: # $client - Socket open on the client.
4225: #
4226: # Returns:
4227: # 1 - indicating processing should continue.
4228: # Side effects:
4229: # An & separated list of results is written to $client.
4230: #
4231: sub get_id_handler {
4232: my ($cmd, $tail, $client) = @_;
4233:
4234:
4235: my $userinput = "$client:$tail";
4236:
4237: my ($udom,$what)=split(/:/,$tail);
4238: chomp($what);
4239: my @queries=split(/\&/,$what);
4240: my $qresult='';
4241: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4242: if ($hashref) {
4243: for (my $i=0;$i<=$#queries;$i++) {
4244: $qresult.="$hashref->{$queries[$i]}&";
4245: }
4246: if (&untie_domain_hash($hashref)) {
4247: $qresult=~s/\&$//;
4248: &Reply($client, \$qresult, $userinput);
4249: } else {
4250: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4251: "while attempting idget\n",$userinput);
4252: }
4253: } else {
4254: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4255: "while attempting idget\n",$userinput);
4256: }
4257:
4258: return 1;
4259: }
4260: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4261:
4262: #
4263: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4264: #
4265: # Parameters
4266: # $cmd - Command keyword that caused us to be dispatched.
4267: # $tail - Tail of the command. Consists of a colon separated:
4268: # domain - the domain whose dcmail we are recording
4269: # email Consists of key=value pair
4270: # where key is unique msgid
4271: # and value is message (in XML)
4272: # $client - Socket open on the client.
4273: #
4274: # Returns:
4275: # 1 - indicating processing should continue.
4276: # Side effects
4277: # reply is written to $client.
4278: #
4279: sub put_dcmail_handler {
4280: my ($cmd,$tail,$client) = @_;
4281: my $userinput = "$cmd:$tail";
4282:
4283: my ($udom,$what)=split(/:/,$tail);
4284: chomp($what);
4285: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4286: if ($hashref) {
4287: my ($key,$value)=split(/=/,$what);
4288: $hashref->{$key}=$value;
4289: }
4290: if (&untie_domain_hash($hashref)) {
4291: &Reply($client, "ok\n", $userinput);
4292: } else {
4293: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4294: "while attempting dcmailput\n", $userinput);
4295: }
4296: return 1;
4297: }
4298: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4299:
4300: #
4301: # Retrieves broadcast e-mail from nohist_dcmail database
4302: # Returns to client an & separated list of key=value pairs,
4303: # where key is msgid and value is message information.
4304: #
4305: # Parameters
4306: # $cmd - Command keyword that caused us to be dispatched.
4307: # $tail - Tail of the command. Consists of a colon separated:
4308: # domain - the domain whose dcmail table we dump
4309: # startfilter - beginning of time window
4310: # endfilter - end of time window
4311: # sendersfilter - & separated list of username:domain
4312: # for senders to search for.
4313: # $client - Socket open on the client.
4314: #
4315: # Returns:
4316: # 1 - indicating processing should continue.
4317: # Side effects
4318: # reply (& separated list of msgid=messageinfo pairs) is
4319: # written to $client.
4320: #
4321: sub dump_dcmail_handler {
4322: my ($cmd, $tail, $client) = @_;
4323:
4324: my $userinput = "$cmd:$tail";
4325: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4326: chomp($sendersfilter);
4327: my @senders = ();
4328: if (defined($startfilter)) {
4329: $startfilter=&unescape($startfilter);
4330: } else {
4331: $startfilter='.';
4332: }
4333: if (defined($endfilter)) {
4334: $endfilter=&unescape($endfilter);
4335: } else {
4336: $endfilter='.';
4337: }
4338: if (defined($sendersfilter)) {
4339: $sendersfilter=&unescape($sendersfilter);
4340: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
4341: }
4342:
4343: my $qresult='';
4344: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4345: if ($hashref) {
4346: while (my ($key,$value) = each(%$hashref)) {
4347: my $match = 1;
4348: my ($timestamp,$subj,$uname,$udom) =
4349: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
4350: $subj = &unescape($subj);
4351: unless ($startfilter eq '.' || !defined($startfilter)) {
4352: if ($timestamp < $startfilter) {
4353: $match = 0;
4354: }
4355: }
4356: unless ($endfilter eq '.' || !defined($endfilter)) {
4357: if ($timestamp > $endfilter) {
4358: $match = 0;
4359: }
4360: }
4361: unless (@senders < 1) {
4362: unless (grep/^$uname:$udom$/,@senders) {
4363: $match = 0;
4364: }
4365: }
4366: if ($match == 1) {
4367: $qresult.=$key.'='.$value.'&';
4368: }
4369: }
4370: if (&untie_domain_hash($hashref)) {
4371: chop($qresult);
4372: &Reply($client, \$qresult, $userinput);
4373: } else {
4374: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4375: "while attempting dcmaildump\n", $userinput);
4376: }
4377: } else {
4378: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4379: "while attempting dcmaildump\n", $userinput);
4380: }
4381: return 1;
4382: }
4383:
4384: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4385:
4386: #
4387: # Puts domain roles in nohist_domainroles database
4388: #
4389: # Parameters
4390: # $cmd - Command keyword that caused us to be dispatched.
4391: # $tail - Tail of the command. Consists of a colon separated:
4392: # domain - the domain whose roles we are recording
4393: # role - Consists of key=value pair
4394: # where key is unique role
4395: # and value is start/end date information
4396: # $client - Socket open on the client.
4397: #
4398: # Returns:
4399: # 1 - indicating processing should continue.
4400: # Side effects
4401: # reply is written to $client.
4402: #
4403:
4404: sub put_domainroles_handler {
4405: my ($cmd,$tail,$client) = @_;
4406:
4407: my $userinput = "$cmd:$tail";
4408: my ($udom,$what)=split(/:/,$tail);
4409: chomp($what);
4410: my @pairs=split(/\&/,$what);
4411: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4412: if ($hashref) {
4413: foreach my $pair (@pairs) {
4414: my ($key,$value)=split(/=/,$pair);
4415: $hashref->{$key}=$value;
4416: }
4417: if (&untie_domain_hash($hashref)) {
4418: &Reply($client, "ok\n", $userinput);
4419: } else {
4420: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4421: "while attempting domroleput\n", $userinput);
4422: }
4423: } else {
4424: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4425: "while attempting domroleput\n", $userinput);
4426: }
4427:
4428: return 1;
4429: }
4430:
4431: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4432:
4433: #
4434: # Retrieves domain roles from nohist_domainroles database
4435: # Returns to client an & separated list of key=value pairs,
4436: # where key is role and value is start and end date information.
4437: #
4438: # Parameters
4439: # $cmd - Command keyword that caused us to be dispatched.
4440: # $tail - Tail of the command. Consists of a colon separated:
4441: # domain - the domain whose domain roles table we dump
4442: # $client - Socket open on the client.
4443: #
4444: # Returns:
4445: # 1 - indicating processing should continue.
4446: # Side effects
4447: # reply (& separated list of role=start/end info pairs) is
4448: # written to $client.
4449: #
4450: sub dump_domainroles_handler {
4451: my ($cmd, $tail, $client) = @_;
4452:
4453: my $userinput = "$cmd:$tail";
4454: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4455: chomp($rolesfilter);
4456: my @roles = ();
4457: if (defined($startfilter)) {
4458: $startfilter=&unescape($startfilter);
4459: } else {
4460: $startfilter='.';
4461: }
4462: if (defined($endfilter)) {
4463: $endfilter=&unescape($endfilter);
4464: } else {
4465: $endfilter='.';
4466: }
4467: if (defined($rolesfilter)) {
4468: $rolesfilter=&unescape($rolesfilter);
4469: @roles = split(/\&/,$rolesfilter);
4470: }
4471:
4472: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4473: if ($hashref) {
4474: my $qresult = '';
4475: while (my ($key,$value) = each(%$hashref)) {
4476: my $match = 1;
4477: my ($end,$start) = split(/:/,&unescape($value));
4478: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
4479: unless (@roles < 1) {
4480: unless (grep/^\Q$trole\E$/,@roles) {
4481: $match = 0;
4482: next;
4483: }
4484: }
4485: unless ($startfilter eq '.' || !defined($startfilter)) {
4486: if ((defined($start)) && ($start >= $startfilter)) {
4487: $match = 0;
4488: next;
4489: }
4490: }
4491: unless ($endfilter eq '.' || !defined($endfilter)) {
4492: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
4493: $match = 0;
4494: next;
4495: }
4496: }
4497: if ($match == 1) {
4498: $qresult.=$key.'='.$value.'&';
4499: }
4500: }
4501: if (&untie_domain_hash($hashref)) {
4502: chop($qresult);
4503: &Reply($client, \$qresult, $userinput);
4504: } else {
4505: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4506: "while attempting domrolesdump\n", $userinput);
4507: }
4508: } else {
4509: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4510: "while attempting domrolesdump\n", $userinput);
4511: }
4512: return 1;
4513: }
4514:
4515: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4516:
4517:
4518: # Process the tmpput command I'm not sure what this does.. Seems to
4519: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4520: # where Id is the client's ip concatenated with a sequence number.
4521: # The file will contain some value that is passed in. Is this e.g.
4522: # a login token?
4523: #
4524: # Parameters:
4525: # $cmd - The command that got us dispatched.
4526: # $tail - The remainder of the request following $cmd:
4527: # In this case this will be the contents of the file.
4528: # $client - Socket connected to the client.
4529: # Returns:
4530: # 1 indicating processing can continue.
4531: # Side effects:
4532: # A file is created in the local filesystem.
4533: # A reply is sent to the client.
4534: sub tmp_put_handler {
4535: my ($cmd, $what, $client) = @_;
4536:
4537: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4538:
4539: my ($record,$context) = split(/:/,$what);
4540: if ($context ne '') {
4541: chomp($context);
4542: $context = &unescape($context);
4543: }
4544: my ($id,$store);
4545: $tmpsnum++;
4546: if ($context eq 'resetpw') {
4547: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4548: } else {
4549: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4550: }
4551: $id=~s/\W/\_/g;
4552: $record=~s/\n//g;
4553: my $execdir=$perlvar{'lonDaemons'};
4554: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
4555: print $store $record;
4556: close $store;
4557: &Reply($client, \$id, $userinput);
4558: } else {
4559: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4560: "while attempting tmpput\n", $userinput);
4561: }
4562: return 1;
4563:
4564: }
4565: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
4566:
4567: # Processes the tmpget command. This command returns the contents
4568: # of a temporary resource file(?) created via tmpput.
4569: #
4570: # Paramters:
4571: # $cmd - Command that got us dispatched.
4572: # $id - Tail of the command, contain the id of the resource
4573: # we want to fetch.
4574: # $client - socket open on the client.
4575: # Return:
4576: # 1 - Inidcating processing can continue.
4577: # Side effects:
4578: # A reply is sent to the client.
4579: #
4580: sub tmp_get_handler {
4581: my ($cmd, $id, $client) = @_;
4582:
4583: my $userinput = "$cmd:$id";
4584:
4585:
4586: $id=~s/\W/\_/g;
4587: my $store;
4588: my $execdir=$perlvar{'lonDaemons'};
4589: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4590: my $reply=<$store>;
4591: &Reply( $client, \$reply, $userinput);
4592: close $store;
4593: } else {
4594: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4595: "while attempting tmpget\n", $userinput);
4596: }
4597:
4598: return 1;
4599: }
4600: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
4601:
4602: #
4603: # Process the tmpdel command. This command deletes a temp resource
4604: # created by the tmpput command.
4605: #
4606: # Parameters:
4607: # $cmd - Command that got us here.
4608: # $id - Id of the temporary resource created.
4609: # $client - socket open on the client process.
4610: #
4611: # Returns:
4612: # 1 - Indicating processing should continue.
4613: # Side Effects:
4614: # A file is deleted
4615: # A reply is sent to the client.
4616: sub tmp_del_handler {
4617: my ($cmd, $id, $client) = @_;
4618:
4619: my $userinput= "$cmd:$id";
4620:
4621: chomp($id);
4622: $id=~s/\W/\_/g;
4623: my $execdir=$perlvar{'lonDaemons'};
4624: if (unlink("$execdir/tmp/$id.tmp")) {
4625: &Reply($client, "ok\n", $userinput);
4626: } else {
4627: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4628: "while attempting tmpdel\n", $userinput);
4629: }
4630:
4631: return 1;
4632:
4633: }
4634: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
4635:
4636: #
4637: # Processes the setannounce command. This command
4638: # creates a file named announce.txt in the top directory of
4639: # the documentn root and sets its contents. The announce.txt file is
4640: # printed in its entirety at the LonCAPA login page. Note:
4641: # once the announcement.txt fileis created it cannot be deleted.
4642: # However, setting the contents of the file to empty removes the
4643: # announcement from the login page of loncapa so who cares.
4644: #
4645: # Parameters:
4646: # $cmd - The command that got us dispatched.
4647: # $announcement - The text of the announcement.
4648: # $client - Socket open on the client process.
4649: # Retunrns:
4650: # 1 - Indicating request processing should continue
4651: # Side Effects:
4652: # The file {DocRoot}/announcement.txt is created.
4653: # A reply is sent to $client.
4654: #
4655: sub set_announce_handler {
4656: my ($cmd, $announcement, $client) = @_;
4657:
4658: my $userinput = "$cmd:$announcement";
4659:
4660: chomp($announcement);
4661: $announcement=&unescape($announcement);
4662: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4663: '/announcement.txt')) {
4664: print $store $announcement;
4665: close $store;
4666: &Reply($client, "ok\n", $userinput);
4667: } else {
4668: &Failure($client, "error: ".($!+0)."\n", $userinput);
4669: }
4670:
4671: return 1;
4672: }
4673: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
4674:
4675: #
4676: # Return the version of the daemon. This can be used to determine
4677: # the compatibility of cross version installations or, alternatively to
4678: # simply know who's out of date and who isn't. Note that the version
4679: # is returned concatenated with the tail.
4680: # Parameters:
4681: # $cmd - the request that dispatched to us.
4682: # $tail - Tail of the request (client's version?).
4683: # $client - Socket open on the client.
4684: #Returns:
4685: # 1 - continue processing requests.
4686: # Side Effects:
4687: # Replies with version to $client.
4688: sub get_version_handler {
4689: my ($cmd, $tail, $client) = @_;
4690:
4691: my $userinput = $cmd.$tail;
4692:
4693: &Reply($client, &version($userinput)."\n", $userinput);
4694:
4695:
4696: return 1;
4697: }
4698: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
4699:
4700: # Set the current host and domain. This is used to support
4701: # multihomed systems. Each IP of the system, or even separate daemons
4702: # on the same IP can be treated as handling a separate lonCAPA virtual
4703: # machine. This command selects the virtual lonCAPA. The client always
4704: # knows the right one since it is lonc and it is selecting the domain/system
4705: # from the hosts.tab file.
4706: # Parameters:
4707: # $cmd - Command that dispatched us.
4708: # $tail - Tail of the command (domain/host requested).
4709: # $socket - Socket open on the client.
4710: #
4711: # Returns:
4712: # 1 - Indicates the program should continue to process requests.
4713: # Side-effects:
4714: # The default domain/system context is modified for this daemon.
4715: # a reply is sent to the client.
4716: #
4717: sub set_virtual_host_handler {
4718: my ($cmd, $tail, $socket) = @_;
4719:
4720: my $userinput ="$cmd:$tail";
4721:
4722: &Reply($client, &sethost($userinput)."\n", $userinput);
4723:
4724:
4725: return 1;
4726: }
4727: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
4728:
4729: # Process a request to exit:
4730: # - "bye" is sent to the client.
4731: # - The client socket is shutdown and closed.
4732: # - We indicate to the caller that we should exit.
4733: # Formal Parameters:
4734: # $cmd - The command that got us here.
4735: # $tail - Tail of the command (empty).
4736: # $client - Socket open on the tail.
4737: # Returns:
4738: # 0 - Indicating the program should exit!!
4739: #
4740: sub exit_handler {
4741: my ($cmd, $tail, $client) = @_;
4742:
4743: my $userinput = "$cmd:$tail";
4744:
4745: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4746: &Reply($client, "bye\n", $userinput);
4747: $client->shutdown(2); # shutdown the socket forcibly.
4748: $client->close();
4749:
4750: return 0;
4751: }
4752: ®ister_handler("exit", \&exit_handler, 0,1,1);
4753: ®ister_handler("init", \&exit_handler, 0,1,1);
4754: ®ister_handler("quit", \&exit_handler, 0,1,1);
4755:
4756: # Determine if auto-enrollment is enabled.
4757: # Note that the original had what I believe to be a defect.
4758: # The original returned 0 if the requestor was not a registerd client.
4759: # It should return "refused".
4760: # Formal Parameters:
4761: # $cmd - The command that invoked us.
4762: # $tail - The tail of the command (Extra command parameters.
4763: # $client - The socket open on the client that issued the request.
4764: # Returns:
4765: # 1 - Indicating processing should continue.
4766: #
4767: sub enrollment_enabled_handler {
4768: my ($cmd, $tail, $client) = @_;
4769: my $userinput = $cmd.":".$tail; # For logging purposes.
4770:
4771:
4772: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4773:
4774: my $outcome = &localenroll::run($cdom);
4775: &Reply($client, \$outcome, $userinput);
4776:
4777: return 1;
4778: }
4779: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4780:
4781: #
4782: # Validate an institutional code used for a LON-CAPA course.
4783: #
4784: # Formal Parameters:
4785: # $cmd - The command request that got us dispatched.
4786: # $tail - The tail of the command. In this case,
4787: # this is a colon separated set of words that will be split
4788: # into:
4789: # $dom - The domain for which the check of
4790: # institutional course code will occur.
4791: #
4792: # $instcode - The institutional code for the course
4793: # being requested, or validated for rights
4794: # to request.
4795: #
4796: # $owner - The course requestor (who will be the
4797: # course owner, in the form username:domain
4798: #
4799: # $client - Socket open on the client.
4800: # Returns:
4801: # 1 - Indicating processing should continue.
4802: #
4803: sub validate_instcode_handler {
4804: my ($cmd, $tail, $client) = @_;
4805: my $userinput = "$cmd:$tail";
4806: my ($dom,$instcode,$owner) = split(/:/, $tail);
4807: $instcode = &unescape($instcode);
4808: $owner = &unescape($owner);
4809: my ($outcome,$description) =
4810: &localenroll::validate_instcode($dom,$instcode,$owner);
4811: my $result = &escape($outcome).'&'.&escape($description);
4812: &Reply($client, \$result, $userinput);
4813:
4814: return 1;
4815: }
4816: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
4817:
4818: # Get the official sections for which auto-enrollment is possible.
4819: # Since the admin people won't know about 'unofficial sections'
4820: # we cannot auto-enroll on them.
4821: # Formal Parameters:
4822: # $cmd - The command request that got us dispatched here.
4823: # $tail - The remainder of the request. In our case this
4824: # will be split into:
4825: # $coursecode - The course name from the admin point of view.
4826: # $cdom - The course's domain(?).
4827: # $client - Socket open on the client.
4828: # Returns:
4829: # 1 - Indiciting processing should continue.
4830: #
4831: sub get_sections_handler {
4832: my ($cmd, $tail, $client) = @_;
4833: my $userinput = "$cmd:$tail";
4834:
4835: my ($coursecode, $cdom) = split(/:/, $tail);
4836: my @secs = &localenroll::get_sections($coursecode,$cdom);
4837: my $seclist = &escape(join(':',@secs));
4838:
4839: &Reply($client, \$seclist, $userinput);
4840:
4841:
4842: return 1;
4843: }
4844: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4845:
4846: # Validate the owner of a new course section.
4847: #
4848: # Formal Parameters:
4849: # $cmd - Command that got us dispatched.
4850: # $tail - the remainder of the command. For us this consists of a
4851: # colon separated string containing:
4852: # $inst - Course Id from the institutions point of view.
4853: # $owner - Proposed owner of the course.
4854: # $cdom - Domain of the course (from the institutions
4855: # point of view?)..
4856: # $client - Socket open on the client.
4857: #
4858: # Returns:
4859: # 1 - Processing should continue.
4860: #
4861: sub validate_course_owner_handler {
4862: my ($cmd, $tail, $client) = @_;
4863: my $userinput = "$cmd:$tail";
4864: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4865:
4866: $owner = &unescape($owner);
4867: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4868: &Reply($client, \$outcome, $userinput);
4869:
4870:
4871:
4872: return 1;
4873: }
4874: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
4875:
4876: #
4877: # Validate a course section in the official schedule of classes
4878: # from the institutions point of view (part of autoenrollment).
4879: #
4880: # Formal Parameters:
4881: # $cmd - The command request that got us dispatched.
4882: # $tail - The tail of the command. In this case,
4883: # this is a colon separated set of words that will be split
4884: # into:
4885: # $inst_course_id - The course/section id from the
4886: # institutions point of view.
4887: # $cdom - The domain from the institutions
4888: # point of view.
4889: # $client - Socket open on the client.
4890: # Returns:
4891: # 1 - Indicating processing should continue.
4892: #
4893: sub validate_course_section_handler {
4894: my ($cmd, $tail, $client) = @_;
4895: my $userinput = "$cmd:$tail";
4896: my ($inst_course_id, $cdom) = split(/:/, $tail);
4897:
4898: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4899: &Reply($client, \$outcome, $userinput);
4900:
4901:
4902: return 1;
4903: }
4904: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4905:
4906: #
4907: # Validate course owner's access to enrollment data for specific class section.
4908: #
4909: #
4910: # Formal Parameters:
4911: # $cmd - The command request that got us dispatched.
4912: # $tail - The tail of the command. In this case this is a colon separated
4913: # set of words that will be split into:
4914: # $inst_class - Institutional code for the specific class section
4915: # $courseowner - The escaped username:domain of the course owner
4916: # $cdom - The domain of the course from the institution's
4917: # point of view.
4918: # $client - The socket open on the client.
4919: # Returns:
4920: # 1 - continue processing.
4921: #
4922:
4923: sub validate_class_access_handler {
4924: my ($cmd, $tail, $client) = @_;
4925: my $userinput = "$cmd:$tail";
4926: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
4927: my $owners = &unescape($ownerlist);
4928: my $outcome;
4929: eval {
4930: local($SIG{__DIE__})='DEFAULT';
4931: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
4932: };
4933: &Reply($client,\$outcome, $userinput);
4934:
4935: return 1;
4936: }
4937: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
4938:
4939: #
4940: # Create a password for a new LON-CAPA user added by auto-enrollment.
4941: # Only used for case where authentication method for new user is localauth
4942: #
4943: # Formal Parameters:
4944: # $cmd - The command request that got us dispatched.
4945: # $tail - The tail of the command. In this case this is a colon separated
4946: # set of words that will be split into:
4947: # $authparam - An authentication parameter (localauth parameter).
4948: # $cdom - The domain of the course from the institution's
4949: # point of view.
4950: # $client - The socket open on the client.
4951: # Returns:
4952: # 1 - continue processing.
4953: #
4954: sub create_auto_enroll_password_handler {
4955: my ($cmd, $tail, $client) = @_;
4956: my $userinput = "$cmd:$tail";
4957:
4958: my ($authparam, $cdom) = split(/:/, $userinput);
4959:
4960: my ($create_passwd,$authchk);
4961: ($authparam,
4962: $create_passwd,
4963: $authchk) = &localenroll::create_password($authparam,$cdom);
4964:
4965: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4966: $userinput);
4967:
4968:
4969: return 1;
4970: }
4971: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4972: 0, 1, 0);
4973:
4974: # Retrieve and remove temporary files created by/during autoenrollment.
4975: #
4976: # Formal Parameters:
4977: # $cmd - The command that got us dispatched.
4978: # $tail - The tail of the command. In our case this is a colon
4979: # separated list that will be split into:
4980: # $filename - The name of the file to remove.
4981: # The filename is given as a path relative to
4982: # the LonCAPA temp file directory.
4983: # $client - Socket open on the client.
4984: #
4985: # Returns:
4986: # 1 - Continue processing.
4987: sub retrieve_auto_file_handler {
4988: my ($cmd, $tail, $client) = @_;
4989: my $userinput = "cmd:$tail";
4990:
4991: my ($filename) = split(/:/, $tail);
4992:
4993: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4994: if ( (-e $source) && ($filename ne '') ) {
4995: my $reply = '';
4996: if (open(my $fh,$source)) {
4997: while (<$fh>) {
4998: chomp($_);
4999: $_ =~ s/^\s+//g;
5000: $_ =~ s/\s+$//g;
5001: $reply .= $_;
5002: }
5003: close($fh);
5004: &Reply($client, &escape($reply)."\n", $userinput);
5005:
5006: # Does this have to be uncommented??!? (RF).
5007: #
5008: # unlink($source);
5009: } else {
5010: &Failure($client, "error\n", $userinput);
5011: }
5012: } else {
5013: &Failure($client, "error\n", $userinput);
5014: }
5015:
5016:
5017: return 1;
5018: }
5019: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5020:
5021: sub crsreq_checks_handler {
5022: my ($cmd, $tail, $client) = @_;
5023: my $userinput = "$cmd:$tail";
5024: my $dom = $tail;
5025: my $result;
5026: my @reqtypes = ('official','unofficial','community');
5027: eval {
5028: local($SIG{__DIE__})='DEFAULT';
5029: my %validations;
5030: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5031: \%validations);
5032: if ($response eq 'ok') {
5033: foreach my $key (keys(%validations)) {
5034: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5035: }
5036: $result =~ s/\&$//;
5037: } else {
5038: $result = 'error';
5039: }
5040: };
5041: if (!$@) {
5042: &Reply($client, \$result, $userinput);
5043: } else {
5044: &Failure($client,"unknown_cmd\n",$userinput);
5045: }
5046: return 1;
5047: }
5048: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5049:
5050: sub validate_crsreq_handler {
5051: my ($cmd, $tail, $client) = @_;
5052: my $userinput = "$cmd:$tail";
5053: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
5054: $instcode = &unescape($instcode);
5055: $owner = &unescape($owner);
5056: $crstype = &unescape($crstype);
5057: $inststatuslist = &unescape($inststatuslist);
5058: $instcode = &unescape($instcode);
5059: $instseclist = &unescape($instseclist);
5060: my $outcome;
5061: eval {
5062: local($SIG{__DIE__})='DEFAULT';
5063: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5064: $inststatuslist,$instcode,
5065: $instseclist);
5066: };
5067: if (!$@) {
5068: &Reply($client, \$outcome, $userinput);
5069: } else {
5070: &Failure($client,"unknown_cmd\n",$userinput);
5071: }
5072: return 1;
5073: }
5074: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5075:
5076: #
5077: # Read and retrieve institutional code format (for support form).
5078: # Formal Parameters:
5079: # $cmd - Command that dispatched us.
5080: # $tail - Tail of the command. In this case it conatins
5081: # the course domain and the coursename.
5082: # $client - Socket open on the client.
5083: # Returns:
5084: # 1 - Continue processing.
5085: #
5086: sub get_institutional_code_format_handler {
5087: my ($cmd, $tail, $client) = @_;
5088: my $userinput = "$cmd:$tail";
5089:
5090: my $reply;
5091: my($cdom,$course) = split(/:/,$tail);
5092: my @pairs = split/\&/,$course;
5093: my %instcodes = ();
5094: my %codes = ();
5095: my @codetitles = ();
5096: my %cat_titles = ();
5097: my %cat_order = ();
5098: foreach (@pairs) {
5099: my ($key,$value) = split/=/,$_;
5100: $instcodes{&unescape($key)} = &unescape($value);
5101: }
5102: my $formatreply = &localenroll::instcode_format($cdom,
5103: \%instcodes,
5104: \%codes,
5105: \@codetitles,
5106: \%cat_titles,
5107: \%cat_order);
5108: if ($formatreply eq 'ok') {
5109: my $codes_str = &Apache::lonnet::hash2str(%codes);
5110: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5111: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5112: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5113: &Reply($client,
5114: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5115: .$cat_order_str."\n",
5116: $userinput);
5117: } else {
5118: # this else branch added by RF since if not ok, lonc will
5119: # hang waiting on reply until timeout.
5120: #
5121: &Reply($client, "format_error\n", $userinput);
5122: }
5123:
5124: return 1;
5125: }
5126: ®ister_handler("autoinstcodeformat",
5127: \&get_institutional_code_format_handler,0,1,0);
5128:
5129: sub get_institutional_defaults_handler {
5130: my ($cmd, $tail, $client) = @_;
5131: my $userinput = "$cmd:$tail";
5132:
5133: my $dom = $tail;
5134: my %defaults_hash;
5135: my @code_order;
5136: my $outcome;
5137: eval {
5138: local($SIG{__DIE__})='DEFAULT';
5139: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5140: \@code_order);
5141: };
5142: if (!$@) {
5143: if ($outcome eq 'ok') {
5144: my $result='';
5145: while (my ($key,$value) = each(%defaults_hash)) {
5146: $result.=&escape($key).'='.&escape($value).'&';
5147: }
5148: $result .= 'code_order='.&escape(join('&',@code_order));
5149: &Reply($client,\$result,$userinput);
5150: } else {
5151: &Reply($client,"error\n", $userinput);
5152: }
5153: } else {
5154: &Failure($client,"unknown_cmd\n",$userinput);
5155: }
5156: }
5157: ®ister_handler("autoinstcodedefaults",
5158: \&get_institutional_defaults_handler,0,1,0);
5159:
5160: sub get_possible_instcodes_handler {
5161: my ($cmd, $tail, $client) = @_;
5162: my $userinput = "$cmd:$tail";
5163:
5164: my $reply;
5165: my $cdom = $tail;
5166: my (@codetitles,%cat_titles,%cat_order,@code_order);
5167: my $formatreply = &localenroll::possible_instcodes($cdom,
5168: \@codetitles,
5169: \%cat_titles,
5170: \%cat_order,
5171: \@code_order);
5172: if ($formatreply eq 'ok') {
5173: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5174: $result .= join('&',map {&escape($_);} (@code_order)).':';
5175: foreach my $key (keys(%cat_titles)) {
5176: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5177: }
5178: $result =~ s/\&$//;
5179: $result .= ':';
5180: foreach my $key (keys(%cat_order)) {
5181: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5182: }
5183: $result =~ s/\&$//;
5184: &Reply($client,\$result,$userinput);
5185: } else {
5186: &Reply($client, "format_error\n", $userinput);
5187: }
5188: return 1;
5189: }
5190: ®ister_handler("autopossibleinstcodes",
5191: \&get_possible_instcodes_handler,0,1,0);
5192:
5193: sub get_institutional_user_rules {
5194: my ($cmd, $tail, $client) = @_;
5195: my $userinput = "$cmd:$tail";
5196: my $dom = &unescape($tail);
5197: my (%rules_hash,@rules_order);
5198: my $outcome;
5199: eval {
5200: local($SIG{__DIE__})='DEFAULT';
5201: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5202: };
5203: if (!$@) {
5204: if ($outcome eq 'ok') {
5205: my $result;
5206: foreach my $key (keys(%rules_hash)) {
5207: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5208: }
5209: $result =~ s/\&$//;
5210: $result .= ':';
5211: if (@rules_order > 0) {
5212: foreach my $item (@rules_order) {
5213: $result .= &escape($item).'&';
5214: }
5215: }
5216: $result =~ s/\&$//;
5217: &Reply($client,\$result,$userinput);
5218: } else {
5219: &Reply($client,"error\n", $userinput);
5220: }
5221: } else {
5222: &Failure($client,"unknown_cmd\n",$userinput);
5223: }
5224: }
5225: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5226:
5227: sub get_institutional_id_rules {
5228: my ($cmd, $tail, $client) = @_;
5229: my $userinput = "$cmd:$tail";
5230: my $dom = &unescape($tail);
5231: my (%rules_hash,@rules_order);
5232: my $outcome;
5233: eval {
5234: local($SIG{__DIE__})='DEFAULT';
5235: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5236: };
5237: if (!$@) {
5238: if ($outcome eq 'ok') {
5239: my $result;
5240: foreach my $key (keys(%rules_hash)) {
5241: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5242: }
5243: $result =~ s/\&$//;
5244: $result .= ':';
5245: if (@rules_order > 0) {
5246: foreach my $item (@rules_order) {
5247: $result .= &escape($item).'&';
5248: }
5249: }
5250: $result =~ s/\&$//;
5251: &Reply($client,\$result,$userinput);
5252: } else {
5253: &Reply($client,"error\n", $userinput);
5254: }
5255: } else {
5256: &Failure($client,"unknown_cmd\n",$userinput);
5257: }
5258: }
5259: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
5260:
5261: sub get_institutional_selfcreate_rules {
5262: my ($cmd, $tail, $client) = @_;
5263: my $userinput = "$cmd:$tail";
5264: my $dom = &unescape($tail);
5265: my (%rules_hash,@rules_order);
5266: my $outcome;
5267: eval {
5268: local($SIG{__DIE__})='DEFAULT';
5269: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
5270: };
5271: if (!$@) {
5272: if ($outcome eq 'ok') {
5273: my $result;
5274: foreach my $key (keys(%rules_hash)) {
5275: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5276: }
5277: $result =~ s/\&$//;
5278: $result .= ':';
5279: if (@rules_order > 0) {
5280: foreach my $item (@rules_order) {
5281: $result .= &escape($item).'&';
5282: }
5283: }
5284: $result =~ s/\&$//;
5285: &Reply($client,\$result,$userinput);
5286: } else {
5287: &Reply($client,"error\n", $userinput);
5288: }
5289: } else {
5290: &Failure($client,"unknown_cmd\n",$userinput);
5291: }
5292: }
5293: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
5294:
5295:
5296: sub institutional_username_check {
5297: my ($cmd, $tail, $client) = @_;
5298: my $userinput = "$cmd:$tail";
5299: my %rulecheck;
5300: my $outcome;
5301: my ($udom,$uname,@rules) = split(/:/,$tail);
5302: $udom = &unescape($udom);
5303: $uname = &unescape($uname);
5304: @rules = map {&unescape($_);} (@rules);
5305: eval {
5306: local($SIG{__DIE__})='DEFAULT';
5307: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
5308: };
5309: if (!$@) {
5310: if ($outcome eq 'ok') {
5311: my $result='';
5312: foreach my $key (keys(%rulecheck)) {
5313: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5314: }
5315: &Reply($client,\$result,$userinput);
5316: } else {
5317: &Reply($client,"error\n", $userinput);
5318: }
5319: } else {
5320: &Failure($client,"unknown_cmd\n",$userinput);
5321: }
5322: }
5323: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
5324:
5325: sub institutional_id_check {
5326: my ($cmd, $tail, $client) = @_;
5327: my $userinput = "$cmd:$tail";
5328: my %rulecheck;
5329: my $outcome;
5330: my ($udom,$id,@rules) = split(/:/,$tail);
5331: $udom = &unescape($udom);
5332: $id = &unescape($id);
5333: @rules = map {&unescape($_);} (@rules);
5334: eval {
5335: local($SIG{__DIE__})='DEFAULT';
5336: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
5337: };
5338: if (!$@) {
5339: if ($outcome eq 'ok') {
5340: my $result='';
5341: foreach my $key (keys(%rulecheck)) {
5342: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5343: }
5344: &Reply($client,\$result,$userinput);
5345: } else {
5346: &Reply($client,"error\n", $userinput);
5347: }
5348: } else {
5349: &Failure($client,"unknown_cmd\n",$userinput);
5350: }
5351: }
5352: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
5353:
5354: sub institutional_selfcreate_check {
5355: my ($cmd, $tail, $client) = @_;
5356: my $userinput = "$cmd:$tail";
5357: my %rulecheck;
5358: my $outcome;
5359: my ($udom,$email,@rules) = split(/:/,$tail);
5360: $udom = &unescape($udom);
5361: $email = &unescape($email);
5362: @rules = map {&unescape($_);} (@rules);
5363: eval {
5364: local($SIG{__DIE__})='DEFAULT';
5365: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
5366: };
5367: if (!$@) {
5368: if ($outcome eq 'ok') {
5369: my $result='';
5370: foreach my $key (keys(%rulecheck)) {
5371: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5372: }
5373: &Reply($client,\$result,$userinput);
5374: } else {
5375: &Reply($client,"error\n", $userinput);
5376: }
5377: } else {
5378: &Failure($client,"unknown_cmd\n",$userinput);
5379: }
5380: }
5381: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
5382:
5383: # Get domain specific conditions for import of student photographs to a course
5384: #
5385: # Retrieves information from photo_permission subroutine in localenroll.
5386: # Returns outcome (ok) if no processing errors, and whether course owner is
5387: # required to accept conditions of use (yes/no).
5388: #
5389: #
5390: sub photo_permission_handler {
5391: my ($cmd, $tail, $client) = @_;
5392: my $userinput = "$cmd:$tail";
5393: my $cdom = $tail;
5394: my ($perm_reqd,$conditions);
5395: my $outcome;
5396: eval {
5397: local($SIG{__DIE__})='DEFAULT';
5398: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
5399: \$conditions);
5400: };
5401: if (!$@) {
5402: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
5403: $userinput);
5404: } else {
5405: &Failure($client,"unknown_cmd\n",$userinput);
5406: }
5407: return 1;
5408: }
5409: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
5410:
5411: #
5412: # Checks if student photo is available for a user in the domain, in the user's
5413: # directory (in /userfiles/internal/studentphoto.jpg).
5414: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
5415: # the student's photo.
5416:
5417: sub photo_check_handler {
5418: my ($cmd, $tail, $client) = @_;
5419: my $userinput = "$cmd:$tail";
5420: my ($udom,$uname,$pid) = split(/:/,$tail);
5421: $udom = &unescape($udom);
5422: $uname = &unescape($uname);
5423: $pid = &unescape($pid);
5424: my $path=&propath($udom,$uname).'/userfiles/internal/';
5425: if (!-e $path) {
5426: &mkpath($path);
5427: }
5428: my $response;
5429: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
5430: $result .= ':'.$response;
5431: &Reply($client, &escape($result)."\n",$userinput);
5432: return 1;
5433: }
5434: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
5435:
5436: #
5437: # Retrieve information from localenroll about whether to provide a button
5438: # for users who have enbled import of student photos to initiate an
5439: # update of photo files for registered students. Also include
5440: # comment to display alongside button.
5441:
5442: sub photo_choice_handler {
5443: my ($cmd, $tail, $client) = @_;
5444: my $userinput = "$cmd:$tail";
5445: my $cdom = &unescape($tail);
5446: my ($update,$comment);
5447: eval {
5448: local($SIG{__DIE__})='DEFAULT';
5449: ($update,$comment) = &localenroll::manager_photo_update($cdom);
5450: };
5451: if (!$@) {
5452: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
5453: } else {
5454: &Failure($client,"unknown_cmd\n",$userinput);
5455: }
5456: return 1;
5457: }
5458: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
5459:
5460: #
5461: # Gets a student's photo to exist (in the correct image type) in the user's
5462: # directory.
5463: # Formal Parameters:
5464: # $cmd - The command request that got us dispatched.
5465: # $tail - A colon separated set of words that will be split into:
5466: # $domain - student's domain
5467: # $uname - student username
5468: # $type - image type desired
5469: # $client - The socket open on the client.
5470: # Returns:
5471: # 1 - continue processing.
5472:
5473: sub student_photo_handler {
5474: my ($cmd, $tail, $client) = @_;
5475: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
5476:
5477: my $path=&propath($domain,$uname). '/userfiles/internal/';
5478: my $filename = 'studentphoto.'.$ext;
5479: if ($type eq 'thumbnail') {
5480: $filename = 'studentphoto_tn.'.$ext;
5481: }
5482: if (-e $path.$filename) {
5483: &Reply($client,"ok\n","$cmd:$tail");
5484: return 1;
5485: }
5486: &mkpath($path);
5487: my $file;
5488: if ($type eq 'thumbnail') {
5489: eval {
5490: local($SIG{__DIE__})='DEFAULT';
5491: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
5492: };
5493: } else {
5494: $file=&localstudentphoto::fetch($domain,$uname);
5495: }
5496: if (!$file) {
5497: &Failure($client,"unavailable\n","$cmd:$tail");
5498: return 1;
5499: }
5500: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
5501: if (-e $path.$filename) {
5502: &Reply($client,"ok\n","$cmd:$tail");
5503: return 1;
5504: }
5505: &Failure($client,"unable_to_convert\n","$cmd:$tail");
5506: return 1;
5507: }
5508: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
5509:
5510: sub inst_usertypes_handler {
5511: my ($cmd, $domain, $client) = @_;
5512: my $res;
5513: my $userinput = $cmd.":".$domain; # For logging purposes.
5514: my (%typeshash,@order,$result);
5515: eval {
5516: local($SIG{__DIE__})='DEFAULT';
5517: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
5518: };
5519: if ($result eq 'ok') {
5520: if (keys(%typeshash) > 0) {
5521: foreach my $key (keys(%typeshash)) {
5522: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
5523: }
5524: }
5525: $res=~s/\&$//;
5526: $res .= ':';
5527: if (@order > 0) {
5528: foreach my $item (@order) {
5529: $res .= &escape($item).'&';
5530: }
5531: }
5532: $res=~s/\&$//;
5533: }
5534: &Reply($client, \$res, $userinput);
5535: return 1;
5536: }
5537: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
5538:
5539: # mkpath makes all directories for a file, expects an absolute path with a
5540: # file or a trailing / if just a dir is passed
5541: # returns 1 on success 0 on failure
5542: sub mkpath {
5543: my ($file)=@_;
5544: my @parts=split(/\//,$file,-1);
5545: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
5546: for (my $i=3;$i<= ($#parts-1);$i++) {
5547: $now.='/'.$parts[$i];
5548: if (!-e $now) {
5549: if (!mkdir($now,0770)) { return 0; }
5550: }
5551: }
5552: return 1;
5553: }
5554:
5555: #---------------------------------------------------------------
5556: #
5557: # Getting, decoding and dispatching requests:
5558: #
5559: #
5560: # Get a Request:
5561: # Gets a Request message from the client. The transaction
5562: # is defined as a 'line' of text. We remove the new line
5563: # from the text line.
5564: #
5565: sub get_request {
5566: my $input = <$client>;
5567: chomp($input);
5568:
5569: &Debug("get_request: Request = $input\n");
5570:
5571: &status('Processing '.$clientname.':'.$input);
5572:
5573: return $input;
5574: }
5575: #---------------------------------------------------------------
5576: #
5577: # Process a request. This sub should shrink as each action
5578: # gets farmed out into a separat sub that is registered
5579: # with the dispatch hash.
5580: #
5581: # Parameters:
5582: # user_input - The request received from the client (lonc).
5583: # Returns:
5584: # true to keep processing, false if caller should exit.
5585: #
5586: sub process_request {
5587: my ($userinput) = @_; # Easier for now to break style than to
5588: # fix all the userinput -> user_input.
5589: my $wasenc = 0; # True if request was encrypted.
5590: # ------------------------------------------------------------ See if encrypted
5591: # for command
5592: # sethost:<server>
5593: # <command>:<args>
5594: # we just send it to the processor
5595: # for
5596: # sethost:<server>:<command>:<args>
5597: # we do the implict set host and then do the command
5598: if ($userinput =~ /^sethost:/) {
5599: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
5600: if (defined($userinput)) {
5601: &sethost("$cmd:$newid");
5602: } else {
5603: $userinput = "$cmd:$newid";
5604: }
5605: }
5606:
5607: if ($userinput =~ /^enc/) {
5608: $userinput = decipher($userinput);
5609: $wasenc=1;
5610: if(!$userinput) { # Cipher not defined.
5611: &Failure($client, "error: Encrypted data without negotated key\n");
5612: return 0;
5613: }
5614: }
5615: Debug("process_request: $userinput\n");
5616:
5617: #
5618: # The 'correct way' to add a command to lond is now to
5619: # write a sub to execute it and Add it to the command dispatch
5620: # hash via a call to register_handler.. The comments to that
5621: # sub should give you enough to go on to show how to do this
5622: # along with the examples that are building up as this code
5623: # is getting refactored. Until all branches of the
5624: # if/elseif monster below have been factored out into
5625: # separate procesor subs, if the dispatch hash is missing
5626: # the command keyword, we will fall through to the remainder
5627: # of the if/else chain below in order to keep this thing in
5628: # working order throughout the transmogrification.
5629:
5630: my ($command, $tail) = split(/:/, $userinput, 2);
5631: chomp($command);
5632: chomp($tail);
5633: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
5634: $command =~ s/(\r)//; # And this too for parameterless commands.
5635: if(!$tail) {
5636: $tail =""; # defined but blank.
5637: }
5638:
5639: &Debug("Command received: $command, encoded = $wasenc");
5640:
5641: if(defined $Dispatcher{$command}) {
5642:
5643: my $dispatch_info = $Dispatcher{$command};
5644: my $handler = $$dispatch_info[0];
5645: my $need_encode = $$dispatch_info[1];
5646: my $client_types = $$dispatch_info[2];
5647: Debug("Matched dispatch hash: mustencode: $need_encode "
5648: ."ClientType $client_types");
5649:
5650: # Validate the request:
5651:
5652: my $ok = 1;
5653: my $requesterprivs = 0;
5654: if(&isClient()) {
5655: $requesterprivs |= $CLIENT_OK;
5656: }
5657: if(&isManager()) {
5658: $requesterprivs |= $MANAGER_OK;
5659: }
5660: if($need_encode && (!$wasenc)) {
5661: Debug("Must encode but wasn't: $need_encode $wasenc");
5662: $ok = 0;
5663: }
5664: if(($client_types & $requesterprivs) == 0) {
5665: Debug("Client not privileged to do this operation");
5666: $ok = 0;
5667: }
5668:
5669: if($ok) {
5670: Debug("Dispatching to handler $command $tail");
5671: my $keep_going = &$handler($command, $tail, $client);
5672: return $keep_going;
5673: } else {
5674: Debug("Refusing to dispatch because client did not match requirements");
5675: Failure($client, "refused\n", $userinput);
5676: return 1;
5677: }
5678:
5679: }
5680:
5681: print $client "unknown_cmd\n";
5682: # -------------------------------------------------------------------- complete
5683: Debug("process_request - returning 1");
5684: return 1;
5685: }
5686: #
5687: # Decipher encoded traffic
5688: # Parameters:
5689: # input - Encoded data.
5690: # Returns:
5691: # Decoded data or undef if encryption key was not yet negotiated.
5692: # Implicit input:
5693: # cipher - This global holds the negotiated encryption key.
5694: #
5695: sub decipher {
5696: my ($input) = @_;
5697: my $output = '';
5698:
5699:
5700: if($cipher) {
5701: my($enc, $enclength, $encinput) = split(/:/, $input);
5702: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5703: $output .=
5704: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5705: }
5706: return substr($output, 0, $enclength);
5707: } else {
5708: return undef;
5709: }
5710: }
5711:
5712: #
5713: # Register a command processor. This function is invoked to register a sub
5714: # to process a request. Once registered, the ProcessRequest sub can automatically
5715: # dispatch requests to an appropriate sub, and do the top level validity checking
5716: # as well:
5717: # - Is the keyword recognized.
5718: # - Is the proper client type attempting the request.
5719: # - Is the request encrypted if it has to be.
5720: # Parameters:
5721: # $request_name - Name of the request being registered.
5722: # This is the command request that will match
5723: # against the hash keywords to lookup the information
5724: # associated with the dispatch information.
5725: # $procedure - Reference to a sub to call to process the request.
5726: # All subs get called as follows:
5727: # Procedure($cmd, $tail, $replyfd, $key)
5728: # $cmd - the actual keyword that invoked us.
5729: # $tail - the tail of the request that invoked us.
5730: # $replyfd- File descriptor connected to the client
5731: # $must_encode - True if the request must be encoded to be good.
5732: # $client_ok - True if it's ok for a client to request this.
5733: # $manager_ok - True if it's ok for a manager to request this.
5734: # Side effects:
5735: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5736: # - On failure, the program will die as it's a bad internal bug to try to
5737: # register a duplicate command handler.
5738: #
5739: sub register_handler {
5740: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
5741:
5742: # Don't allow duplication#
5743:
5744: if (defined $Dispatcher{$request_name}) {
5745: die "Attempting to define a duplicate request handler for $request_name\n";
5746: }
5747: # Build the client type mask:
5748:
5749: my $client_type_mask = 0;
5750: if($client_ok) {
5751: $client_type_mask |= $CLIENT_OK;
5752: }
5753: if($manager_ok) {
5754: $client_type_mask |= $MANAGER_OK;
5755: }
5756:
5757: # Enter the hash:
5758:
5759: my @entry = ($procedure, $must_encode, $client_type_mask);
5760:
5761: $Dispatcher{$request_name} = \@entry;
5762:
5763: }
5764:
5765:
5766: #------------------------------------------------------------------
5767:
5768:
5769:
5770:
5771: #
5772: # Convert an error return code from lcpasswd to a string value.
5773: #
5774: sub lcpasswdstrerror {
5775: my $ErrorCode = shift;
5776: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
5777: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5778: } else {
5779: return $passwderrors[$ErrorCode];
5780: }
5781: }
5782:
5783: #
5784: # Convert an error return code from lcuseradd to a string value:
5785: #
5786: sub lcuseraddstrerror {
5787: my $ErrorCode = shift;
5788: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
5789: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
5790: } else {
5791: return $adderrors[$ErrorCode];
5792: }
5793: }
5794:
5795: # grabs exception and records it to log before exiting
5796: sub catchexception {
5797: my ($error)=@_;
5798: $SIG{'QUIT'}='DEFAULT';
5799: $SIG{__DIE__}='DEFAULT';
5800: &status("Catching exception");
5801: &logthis("<font color='red'>CRITICAL: "
5802: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
5803: ."a crash with this error msg->[$error]</font>");
5804: &logthis('Famous last words: '.$status.' - '.$lastlog);
5805: if ($client) { print $client "error: $error\n"; }
5806: $server->close();
5807: die($error);
5808: }
5809: sub timeout {
5810: &status("Handling Timeout");
5811: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
5812: &catchexception('Timeout');
5813: }
5814: # -------------------------------- Set signal handlers to record abnormal exits
5815:
5816:
5817: $SIG{'QUIT'}=\&catchexception;
5818: $SIG{__DIE__}=\&catchexception;
5819:
5820: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
5821: &status("Read loncapa.conf and loncapa_apache.conf");
5822: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
5823: %perlvar=%{$perlvarref};
5824: undef $perlvarref;
5825:
5826: # ----------------------------- Make sure this process is running from user=www
5827: my $wwwid=getpwnam('www');
5828: if ($wwwid!=$<) {
5829: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5830: my $subj="LON: $currenthostid User ID mismatch";
5831: system("echo 'User ID mismatch. lond must be run as user www.' |\
5832: mailto $emailto -s '$subj' > /dev/null");
5833: exit 1;
5834: }
5835:
5836: # --------------------------------------------- Check if other instance running
5837:
5838: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
5839:
5840: if (-e $pidfile) {
5841: my $lfh=IO::File->new("$pidfile");
5842: my $pide=<$lfh>;
5843: chomp($pide);
5844: if (kill 0 => $pide) { die "already running"; }
5845: }
5846:
5847: # ------------------------------------------------------------- Read hosts file
5848:
5849:
5850:
5851: # establish SERVER socket, bind and listen.
5852: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
5853: Type => SOCK_STREAM,
5854: Proto => 'tcp',
5855: Reuse => 1,
5856: Listen => 10 )
5857: or die "making socket: $@\n";
5858:
5859: # --------------------------------------------------------- Do global variables
5860:
5861: # global variables
5862:
5863: my %children = (); # keys are current child process IDs
5864:
5865: sub REAPER { # takes care of dead children
5866: $SIG{CHLD} = \&REAPER;
5867: &status("Handling child death");
5868: my $pid;
5869: do {
5870: $pid = waitpid(-1,&WNOHANG());
5871: if (defined($children{$pid})) {
5872: &logthis("Child $pid died");
5873: delete($children{$pid});
5874: } elsif ($pid > 0) {
5875: &logthis("Unknown Child $pid died");
5876: }
5877: } while ( $pid > 0 );
5878: foreach my $child (keys(%children)) {
5879: $pid = waitpid($child,&WNOHANG());
5880: if ($pid > 0) {
5881: &logthis("Child $child - $pid looks like we missed it's death");
5882: delete($children{$pid});
5883: }
5884: }
5885: &status("Finished Handling child death");
5886: }
5887:
5888: sub HUNTSMAN { # signal handler for SIGINT
5889: &status("Killing children (INT)");
5890: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5891: kill 'INT' => keys %children;
5892: &logthis("Free socket: ".shutdown($server,2)); # free up socket
5893: my $execdir=$perlvar{'lonDaemons'};
5894: unlink("$execdir/logs/lond.pid");
5895: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
5896: &status("Done killing children");
5897: exit; # clean up with dignity
5898: }
5899:
5900: sub HUPSMAN { # signal handler for SIGHUP
5901: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5902: &status("Killing children for restart (HUP)");
5903: kill 'INT' => keys %children;
5904: &logthis("Free socket: ".shutdown($server,2)); # free up socket
5905: &logthis("<font color='red'>CRITICAL: Restarting</font>");
5906: my $execdir=$perlvar{'lonDaemons'};
5907: unlink("$execdir/logs/lond.pid");
5908: &status("Restarting self (HUP)");
5909: exec("$execdir/lond"); # here we go again
5910: }
5911:
5912: #
5913: # Reload the Apache daemon's state.
5914: # This is done by invoking /home/httpd/perl/apachereload
5915: # a setuid perl script that can be root for us to do this job.
5916: #
5917: sub ReloadApache {
5918: my $execdir = $perlvar{'lonDaemons'};
5919: my $script = $execdir."/apachereload";
5920: system($script);
5921: }
5922:
5923: #
5924: # Called in response to a USR2 signal.
5925: # - Reread hosts.tab
5926: # - All children connected to hosts that were removed from hosts.tab
5927: # are killed via SIGINT
5928: # - All children connected to previously existing hosts are sent SIGUSR1
5929: # - Our internal hosts hash is updated to reflect the new contents of
5930: # hosts.tab causing connections from hosts added to hosts.tab to
5931: # now be honored.
5932: #
5933: sub UpdateHosts {
5934: &status("Reload hosts.tab");
5935: logthis('<font color="blue"> Updating connections </font>');
5936: #
5937: # The %children hash has the set of IP's we currently have children
5938: # on. These need to be matched against records in the hosts.tab
5939: # Any ip's no longer in the table get killed off they correspond to
5940: # either dropped or changed hosts. Note that the re-read of the table
5941: # will take care of new and changed hosts as connections come into being.
5942:
5943: &Apache::lonnet::reset_hosts_info();
5944:
5945: foreach my $child (keys(%children)) {
5946: my $childip = $children{$child};
5947: if ($childip ne '127.0.0.1'
5948: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
5949: logthis('<font color="blue"> UpdateHosts killing child '
5950: ." $child for ip $childip </font>");
5951: kill('INT', $child);
5952: } else {
5953: logthis('<font color="green"> keeping child for ip '
5954: ." $childip (pid=$child) </font>");
5955: }
5956: }
5957: ReloadApache;
5958: &status("Finished reloading hosts.tab");
5959: }
5960:
5961:
5962: sub checkchildren {
5963: &status("Checking on the children (sending signals)");
5964: &initnewstatus();
5965: &logstatus();
5966: &logthis('Going to check on the children');
5967: my $docdir=$perlvar{'lonDocRoot'};
5968: foreach (sort keys %children) {
5969: #sleep 1;
5970: unless (kill 'USR1' => $_) {
5971: &logthis ('Child '.$_.' is dead');
5972: &logstatus($$.' is dead');
5973: delete($children{$_});
5974: }
5975: }
5976: sleep 5;
5977: $SIG{ALRM} = sub { Debug("timeout");
5978: die "timeout"; };
5979: $SIG{__DIE__} = 'DEFAULT';
5980: &status("Checking on the children (waiting for reports)");
5981: foreach (sort keys %children) {
5982: unless (-e "$docdir/lon-status/londchld/$_.txt") {
5983: eval {
5984: alarm(300);
5985: &logthis('Child '.$_.' did not respond');
5986: kill 9 => $_;
5987: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5988: #$subj="LON: $currenthostid killed lond process $_";
5989: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
5990: #$execdir=$perlvar{'lonDaemons'};
5991: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
5992: delete($children{$_});
5993: alarm(0);
5994: }
5995: }
5996: }
5997: $SIG{ALRM} = 'DEFAULT';
5998: $SIG{__DIE__} = \&catchexception;
5999: &status("Finished checking children");
6000: &logthis('Finished Checking children');
6001: }
6002:
6003: # --------------------------------------------------------------------- Logging
6004:
6005: sub logthis {
6006: my $message=shift;
6007: my $execdir=$perlvar{'lonDaemons'};
6008: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6009: my $now=time;
6010: my $local=localtime($now);
6011: $lastlog=$local.': '.$message;
6012: print $fh "$local ($$): $message\n";
6013: }
6014:
6015: # ------------------------- Conditional log if $DEBUG true.
6016: sub Debug {
6017: my $message = shift;
6018: if($DEBUG) {
6019: &logthis($message);
6020: }
6021: }
6022:
6023: #
6024: # Sub to do replies to client.. this gives a hook for some
6025: # debug tracing too:
6026: # Parameters:
6027: # fd - File open on client.
6028: # reply - Text to send to client.
6029: # request - Original request from client.
6030: #
6031: sub Reply {
6032: my ($fd, $reply, $request) = @_;
6033: if (ref($reply)) {
6034: print $fd $$reply;
6035: print $fd "\n";
6036: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6037: } else {
6038: print $fd $reply;
6039: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6040: }
6041: $Transactions++;
6042: }
6043:
6044:
6045: #
6046: # Sub to report a failure.
6047: # This function:
6048: # - Increments the failure statistic counters.
6049: # - Invokes Reply to send the error message to the client.
6050: # Parameters:
6051: # fd - File descriptor open on the client
6052: # reply - Reply text to emit.
6053: # request - The original request message (used by Reply
6054: # to debug if that's enabled.
6055: # Implicit outputs:
6056: # $Failures- The number of failures is incremented.
6057: # Reply (invoked here) sends a message to the
6058: # client:
6059: #
6060: sub Failure {
6061: my $fd = shift;
6062: my $reply = shift;
6063: my $request = shift;
6064:
6065: $Failures++;
6066: Reply($fd, $reply, $request); # That's simple eh?
6067: }
6068: # ------------------------------------------------------------------ Log status
6069:
6070: sub logstatus {
6071: &status("Doing logging");
6072: my $docdir=$perlvar{'lonDocRoot'};
6073: {
6074: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6075: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6076: $fh->close();
6077: }
6078: &status("Finished $$.txt");
6079: {
6080: open(LOG,">>$docdir/lon-status/londstatus.txt");
6081: flock(LOG,LOCK_EX);
6082: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6083: .$status."\t".$lastlog."\t $keymode\n";
6084: flock(LOG,LOCK_UN);
6085: close(LOG);
6086: }
6087: &status("Finished logging");
6088: }
6089:
6090: sub initnewstatus {
6091: my $docdir=$perlvar{'lonDocRoot'};
6092: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6093: my $now=time;
6094: my $local=localtime($now);
6095: print $fh "LOND status $local - parent $$\n\n";
6096: opendir(DIR,"$docdir/lon-status/londchld");
6097: while (my $filename=readdir(DIR)) {
6098: unlink("$docdir/lon-status/londchld/$filename");
6099: }
6100: closedir(DIR);
6101: }
6102:
6103: # -------------------------------------------------------------- Status setting
6104:
6105: sub status {
6106: my $what=shift;
6107: my $now=time;
6108: my $local=localtime($now);
6109: $status=$local.': '.$what;
6110: $0='lond: '.$what.' '.$local;
6111: }
6112:
6113: # -------------------------------------------------------------- Talk to lonsql
6114:
6115: sub sql_reply {
6116: my ($cmd)=@_;
6117: my $answer=&sub_sql_reply($cmd);
6118: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6119: return $answer;
6120: }
6121:
6122: sub sub_sql_reply {
6123: my ($cmd)=@_;
6124: my $unixsock="mysqlsock";
6125: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6126: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6127: Type => SOCK_STREAM,
6128: Timeout => 10)
6129: or return "con_lost";
6130: print $sclient "$cmd:$currentdomainid\n";
6131: my $answer=<$sclient>;
6132: chomp($answer);
6133: if (!$answer) { $answer="con_lost"; }
6134: return $answer;
6135: }
6136:
6137: # --------------------------------------- Is this the home server of an author?
6138:
6139: sub ishome {
6140: my $author=shift;
6141: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6142: my ($udom,$uname)=split(/\//,$author);
6143: my $proname=propath($udom,$uname);
6144: if (-e $proname) {
6145: return 'owner';
6146: } else {
6147: return 'not_owner';
6148: }
6149: }
6150:
6151: # ======================================================= Continue main program
6152: # ---------------------------------------------------- Fork once and dissociate
6153:
6154: my $fpid=fork;
6155: exit if $fpid;
6156: die "Couldn't fork: $!" unless defined ($fpid);
6157:
6158: POSIX::setsid() or die "Can't start new session: $!";
6159:
6160: # ------------------------------------------------------- Write our PID on disk
6161:
6162: my $execdir=$perlvar{'lonDaemons'};
6163: open (PIDSAVE,">$execdir/logs/lond.pid");
6164: print PIDSAVE "$$\n";
6165: close(PIDSAVE);
6166: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
6167: &status('Starting');
6168:
6169:
6170:
6171: # ----------------------------------------------------- Install signal handlers
6172:
6173:
6174: $SIG{CHLD} = \&REAPER;
6175: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6176: $SIG{HUP} = \&HUPSMAN;
6177: $SIG{USR1} = \&checkchildren;
6178: $SIG{USR2} = \&UpdateHosts;
6179:
6180: # Read the host hashes:
6181: &Apache::lonnet::load_hosts_tab();
6182:
6183: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
6184:
6185: # --------------------------------------------------------------
6186: # Accept connections. When a connection comes in, it is validated
6187: # and if good, a child process is created to process transactions
6188: # along the connection.
6189:
6190: while (1) {
6191: &status('Starting accept');
6192: $client = $server->accept() or next;
6193: &status('Accepted '.$client.' off to spawn');
6194: make_new_child($client);
6195: &status('Finished spawning');
6196: }
6197:
6198: sub make_new_child {
6199: my $pid;
6200: # my $cipher; # Now global
6201: my $sigset;
6202:
6203: $client = shift;
6204: &status('Starting new child '.$client);
6205: &logthis('<font color="green"> Attempting to start child ('.$client.
6206: ")</font>");
6207: # block signal for fork
6208: $sigset = POSIX::SigSet->new(SIGINT);
6209: sigprocmask(SIG_BLOCK, $sigset)
6210: or die "Can't block SIGINT for fork: $!\n";
6211:
6212: die "fork: $!" unless defined ($pid = fork);
6213:
6214: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6215: # connection liveness.
6216:
6217: #
6218: # Figure out who we're talking to so we can record the peer in
6219: # the pid hash.
6220: #
6221: my $caller = getpeername($client);
6222: my ($port,$iaddr);
6223: if (defined($caller) && length($caller) > 0) {
6224: ($port,$iaddr)=unpack_sockaddr_in($caller);
6225: } else {
6226: &logthis("Unable to determine who caller was, getpeername returned nothing");
6227: }
6228: if (defined($iaddr)) {
6229: $clientip = inet_ntoa($iaddr);
6230: Debug("Connected with $clientip");
6231: } else {
6232: &logthis("Unable to determine clientip");
6233: $clientip='Unavailable';
6234: }
6235:
6236: if ($pid) {
6237: # Parent records the child's birth and returns.
6238: sigprocmask(SIG_UNBLOCK, $sigset)
6239: or die "Can't unblock SIGINT for fork: $!\n";
6240: $children{$pid} = $clientip;
6241: &status('Started child '.$pid);
6242: return;
6243: } else {
6244: # Child can *not* return from this subroutine.
6245: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
6246: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
6247: #don't get intercepted
6248: $SIG{USR1}= \&logstatus;
6249: $SIG{ALRM}= \&timeout;
6250: $lastlog='Forked ';
6251: $status='Forked';
6252:
6253: # unblock signals
6254: sigprocmask(SIG_UNBLOCK, $sigset)
6255: or die "Can't unblock SIGINT for fork: $!\n";
6256:
6257: # my $tmpsnum=0; # Now global
6258: #---------------------------------------------------- kerberos 5 initialization
6259: &Authen::Krb5::init_context();
6260: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
6261: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
6262: &Authen::Krb5::init_ets();
6263: }
6264:
6265: &status('Accepted connection');
6266: # =============================================================================
6267: # do something with the connection
6268: # -----------------------------------------------------------------------------
6269: # see if we know client and 'check' for spoof IP by ineffective challenge
6270:
6271: my $outsideip=$clientip;
6272: if ($clientip eq '127.0.0.1') {
6273: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
6274: }
6275: &ReadManagerTable();
6276: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
6277: my $ismanager=($managers{$outsideip} ne undef);
6278: $clientname = "[unknown]";
6279: if($clientrec) { # Establish client type.
6280: $ConnectionType = "client";
6281: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
6282: if($ismanager) {
6283: $ConnectionType = "both";
6284: }
6285: } else {
6286: $ConnectionType = "manager";
6287: $clientname = $managers{$outsideip};
6288: }
6289: my $clientok;
6290:
6291: if ($clientrec || $ismanager) {
6292: &status("Waiting for init from $clientip $clientname");
6293: &logthis('<font color="yellow">INFO: Connection, '.
6294: $clientip.
6295: " ($clientname) connection type = $ConnectionType </font>" );
6296: &status("Connecting $clientip ($clientname))");
6297: my $remotereq=<$client>;
6298: chomp($remotereq);
6299: Debug("Got init: $remotereq");
6300:
6301: if ($remotereq =~ /^init/) {
6302: &sethost("sethost:$perlvar{'lonHostID'}");
6303: #
6304: # If the remote is attempting a local init... give that a try:
6305: #
6306: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
6307:
6308: # If the connection type is ssl, but I didn't get my
6309: # certificate files yet, then I'll drop back to
6310: # insecure (if allowed).
6311:
6312: if($inittype eq "ssl") {
6313: my ($ca, $cert) = lonssl::CertificateFile;
6314: my $kfile = lonssl::KeyFile;
6315: if((!$ca) ||
6316: (!$cert) ||
6317: (!$kfile)) {
6318: $inittype = ""; # This forces insecure attempt.
6319: &logthis("<font color=\"blue\"> Certificates not "
6320: ."installed -- trying insecure auth</font>");
6321: } else { # SSL certificates are in place so
6322: } # Leave the inittype alone.
6323: }
6324:
6325: if($inittype eq "local") {
6326: $clientversion = $perlvar{'lonVersion'};
6327: my $key = LocalConnection($client, $remotereq);
6328: if($key) {
6329: Debug("Got local key $key");
6330: $clientok = 1;
6331: my $cipherkey = pack("H32", $key);
6332: $cipher = new IDEA($cipherkey);
6333: print $client "ok:local\n";
6334: &logthis('<font color="green"'
6335: . "Successful local authentication </font>");
6336: $keymode = "local"
6337: } else {
6338: Debug("Failed to get local key");
6339: $clientok = 0;
6340: shutdown($client, 3);
6341: close $client;
6342: }
6343: } elsif ($inittype eq "ssl") {
6344: my $key = SSLConnection($client);
6345: if ($key) {
6346: $clientok = 1;
6347: my $cipherkey = pack("H32", $key);
6348: $cipher = new IDEA($cipherkey);
6349: &logthis('<font color="green">'
6350: ."Successfull ssl authentication with $clientname </font>");
6351: $keymode = "ssl";
6352:
6353: } else {
6354: $clientok = 0;
6355: close $client;
6356: }
6357:
6358: } else {
6359: my $ok = InsecureConnection($client);
6360: if($ok) {
6361: $clientok = 1;
6362: &logthis('<font color="green">'
6363: ."Successful insecure authentication with $clientname </font>");
6364: print $client "ok\n";
6365: $keymode = "insecure";
6366: } else {
6367: &logthis('<font color="yellow">'
6368: ."Attempted insecure connection disallowed </font>");
6369: close $client;
6370: $clientok = 0;
6371:
6372: }
6373: }
6374: } else {
6375: &logthis(
6376: "<font color='blue'>WARNING: "
6377: ."$clientip failed to initialize: >$remotereq< </font>");
6378: &status('No init '.$clientip);
6379: }
6380:
6381: } else {
6382: &logthis(
6383: "<font color='blue'>WARNING: Unknown client $clientip</font>");
6384: &status('Hung up on '.$clientip);
6385: }
6386:
6387: if ($clientok) {
6388: # ---------------- New known client connecting, could mean machine online again
6389: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
6390: && $clientip ne '127.0.0.1') {
6391: &Apache::lonnet::reconlonc($clientname);
6392: }
6393: &logthis("<font color='green'>Established connection: $clientname</font>");
6394: &status('Will listen to '.$clientname);
6395: # ------------------------------------------------------------ Process requests
6396: my $keep_going = 1;
6397: my $user_input;
6398: while(($user_input = get_request) && $keep_going) {
6399: alarm(120);
6400: Debug("Main: Got $user_input\n");
6401: $keep_going = &process_request($user_input);
6402: alarm(0);
6403: &status('Listening to '.$clientname." ($keymode)");
6404: }
6405:
6406: # --------------------------------------------- client unknown or fishy, refuse
6407: } else {
6408: print $client "refused\n";
6409: $client->close();
6410: &logthis("<font color='blue'>WARNING: "
6411: ."Rejected client $clientip, closing connection</font>");
6412: }
6413: }
6414:
6415: # =============================================================================
6416:
6417: &logthis("<font color='red'>CRITICAL: "
6418: ."Disconnect from $clientip ($clientname)</font>");
6419:
6420:
6421: # this exit is VERY important, otherwise the child will become
6422: # a producer of more and more children, forking yourself into
6423: # process death.
6424: exit;
6425:
6426: }
6427: #
6428: # Determine if a user is an author for the indicated domain.
6429: #
6430: # Parameters:
6431: # domain - domain to check in .
6432: # user - Name of user to check.
6433: #
6434: # Return:
6435: # 1 - User is an author for domain.
6436: # 0 - User is not an author for domain.
6437: sub is_author {
6438: my ($domain, $user) = @_;
6439:
6440: &Debug("is_author: $user @ $domain");
6441:
6442: my $hashref = &tie_user_hash($domain, $user, "roles",
6443: &GDBM_READER());
6444:
6445: # Author role should show up as a key /domain/_au
6446:
6447: my $key = "/$domain/_au";
6448: my $value;
6449: if (defined($hashref)) {
6450: $value = $hashref->{$key};
6451: }
6452:
6453: if(defined($value)) {
6454: &Debug("$user @ $domain is an author");
6455: }
6456:
6457: return defined($value);
6458: }
6459: #
6460: # Checks to see if the input roleput request was to set
6461: # an author role. If so, invokes the lchtmldir script to set
6462: # up a correct public_html
6463: # Parameters:
6464: # request - The request sent to the rolesput subchunk.
6465: # We're looking for /domain/_au
6466: # domain - The domain in which the user is having roles doctored.
6467: # user - Name of the user for which the role is being put.
6468: # authtype - The authentication type associated with the user.
6469: #
6470: sub manage_permissions {
6471: my ($request, $domain, $user, $authtype) = @_;
6472:
6473: &Debug("manage_permissions: $request $domain $user $authtype");
6474:
6475: # See if the request is of the form /$domain/_au
6476: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
6477: my $execdir = $perlvar{'lonDaemons'};
6478: my $userhome= "/home/$user" ;
6479: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
6480: &Debug("Setting homedir permissions for $userhome");
6481: system("$execdir/lchtmldir $userhome $user $authtype");
6482: }
6483: }
6484:
6485:
6486: #
6487: # Return the full path of a user password file, whether it exists or not.
6488: # Parameters:
6489: # domain - Domain in which the password file lives.
6490: # user - name of the user.
6491: # Returns:
6492: # Full passwd path:
6493: #
6494: sub password_path {
6495: my ($domain, $user) = @_;
6496: return &propath($domain, $user).'/passwd';
6497: }
6498:
6499: # Password Filename
6500: # Returns the path to a passwd file given domain and user... only if
6501: # it exists.
6502: # Parameters:
6503: # domain - Domain in which to search.
6504: # user - username.
6505: # Returns:
6506: # - If the password file exists returns its path.
6507: # - If the password file does not exist, returns undefined.
6508: #
6509: sub password_filename {
6510: my ($domain, $user) = @_;
6511:
6512: Debug ("PasswordFilename called: dom = $domain user = $user");
6513:
6514: my $path = &password_path($domain, $user);
6515: Debug("PasswordFilename got path: $path");
6516: if(-e $path) {
6517: return $path;
6518: } else {
6519: return undef;
6520: }
6521: }
6522:
6523: #
6524: # Rewrite the contents of the user's passwd file.
6525: # Parameters:
6526: # domain - domain of the user.
6527: # name - User's name.
6528: # contents - New contents of the file.
6529: # Returns:
6530: # 0 - Failed.
6531: # 1 - Success.
6532: #
6533: sub rewrite_password_file {
6534: my ($domain, $user, $contents) = @_;
6535:
6536: my $file = &password_filename($domain, $user);
6537: if (defined $file) {
6538: my $pf = IO::File->new(">$file");
6539: if($pf) {
6540: print $pf "$contents\n";
6541: return 1;
6542: } else {
6543: return 0;
6544: }
6545: } else {
6546: return 0;
6547: }
6548:
6549: }
6550:
6551: #
6552: # get_auth_type - Determines the authorization type of a user in a domain.
6553:
6554: # Returns the authorization type or nouser if there is no such user.
6555: #
6556: sub get_auth_type
6557: {
6558:
6559: my ($domain, $user) = @_;
6560:
6561: Debug("get_auth_type( $domain, $user ) \n");
6562: my $proname = &propath($domain, $user);
6563: my $passwdfile = "$proname/passwd";
6564: if( -e $passwdfile ) {
6565: my $pf = IO::File->new($passwdfile);
6566: my $realpassword = <$pf>;
6567: chomp($realpassword);
6568: Debug("Password info = $realpassword\n");
6569: my ($authtype, $contentpwd) = split(/:/, $realpassword);
6570: Debug("Authtype = $authtype, content = $contentpwd\n");
6571: return "$authtype:$contentpwd";
6572: } else {
6573: Debug("Returning nouser");
6574: return "nouser";
6575: }
6576: }
6577:
6578: #
6579: # Validate a user given their domain, name and password. This utility
6580: # function is used by both AuthenticateHandler and ChangePasswordHandler
6581: # to validate the login credentials of a user.
6582: # Parameters:
6583: # $domain - The domain being logged into (this is required due to
6584: # the capability for multihomed systems.
6585: # $user - The name of the user being validated.
6586: # $password - The user's propoposed password.
6587: #
6588: # Returns:
6589: # 1 - The domain,user,pasword triplet corresponds to a valid
6590: # user.
6591: # 0 - The domain,user,password triplet is not a valid user.
6592: #
6593: sub validate_user {
6594: my ($domain, $user, $password, $checkdefauth) = @_;
6595:
6596: # Why negative ~pi you may well ask? Well this function is about
6597: # authentication, and therefore very important to get right.
6598: # I've initialized the flag that determines whether or not I've
6599: # validated correctly to a value it's not supposed to get.
6600: # At the end of this function. I'll ensure that it's not still that
6601: # value so we don't just wind up returning some accidental value
6602: # as a result of executing an unforseen code path that
6603: # did not set $validated. At the end of valid execution paths,
6604: # validated shoule be 1 for success or 0 for failuer.
6605:
6606: my $validated = -3.14159;
6607:
6608: # How we authenticate is determined by the type of authentication
6609: # the user has been assigned. If the authentication type is
6610: # "nouser", the user does not exist so we will return 0.
6611:
6612: my $contents = &get_auth_type($domain, $user);
6613: my ($howpwd, $contentpwd) = split(/:/, $contents);
6614:
6615: my $null = pack("C",0); # Used by kerberos auth types.
6616:
6617: if ($howpwd eq 'nouser') {
6618: if ($checkdefauth) {
6619: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
6620: if ($domdefaults{'auth_def'} eq 'localauth') {
6621: $howpwd = $domdefaults{'auth_def'};
6622: $contentpwd = $domdefaults{'auth_arg_def'};
6623: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
6624: ($domdefaults{'auth_def'} eq 'krb5')) &&
6625: ($domdefaults{'auth_arg_def'} ne '')) {
6626: $howpwd = $domdefaults{'auth_def'};
6627: $contentpwd = $domdefaults{'auth_arg_def'};
6628: }
6629: }
6630: }
6631: if ($howpwd ne 'nouser') {
6632: if($howpwd eq "internal") { # Encrypted is in local password file.
6633: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6634: }
6635: elsif ($howpwd eq "unix") { # User is a normal unix user.
6636: $contentpwd = (getpwnam($user))[1];
6637: if($contentpwd) {
6638: if($contentpwd eq 'x') { # Shadow password file...
6639: my $pwauth_path = "/usr/local/sbin/pwauth";
6640: open PWAUTH, "|$pwauth_path" or
6641: die "Cannot invoke authentication";
6642: print PWAUTH "$user\n$password\n";
6643: close PWAUTH;
6644: $validated = ! $?;
6645:
6646: } else { # Passwords in /etc/passwd.
6647: $validated = (crypt($password,
6648: $contentpwd) eq $contentpwd);
6649: }
6650: } else {
6651: $validated = 0;
6652: }
6653: }
6654: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6655: if(! ($password =~ /$null/) ) {
6656: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6657: "",
6658: $contentpwd,,
6659: 'krbtgt',
6660: $contentpwd,
6661: 1,
6662: $password);
6663: if(!$k4error) {
6664: $validated = 1;
6665: } else {
6666: $validated = 0;
6667: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6668: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6669: }
6670: } else {
6671: $validated = 0; # Password has a match with null.
6672: }
6673: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
6674: if(!($password =~ /$null/)) { # Null password not allowed.
6675: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6676: .$contentpwd);
6677: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6678: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6679: my $credentials= &Authen::Krb5::cc_default();
6680: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6681: .$contentpwd));
6682: my $krbreturn;
6683: if (exists(&Authen::Krb5::get_init_creds_password)) {
6684: $krbreturn =
6685: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6686: $krbservice);
6687: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6688: } else {
6689: $krbreturn =
6690: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6691: $password,$credentials);
6692: $validated = ($krbreturn == 1);
6693: }
6694: if (!$validated) {
6695: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6696: &Authen::Krb5::error());
6697: }
6698: } else {
6699: $validated = 0;
6700: }
6701: } elsif ($howpwd eq "localauth") {
6702: # Authenticate via installation specific authentcation method:
6703: $validated = &localauth::localauth($user,
6704: $password,
6705: $contentpwd,
6706: $domain);
6707: if ($validated < 0) {
6708: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6709: $validated = 0;
6710: }
6711: } else { # Unrecognized auth is also bad.
6712: $validated = 0;
6713: }
6714: } else {
6715: $validated = 0;
6716: }
6717: #
6718: # $validated has the correct stat of the authentication:
6719: #
6720:
6721: unless ($validated != -3.14159) {
6722: # I >really really< want to know if this happens.
6723: # since it indicates that user authentication is badly
6724: # broken in some code path.
6725: #
6726: die "ValidateUser - failed to set the value of validated $domain, $user $password";
6727: }
6728: return $validated;
6729: }
6730:
6731:
6732: sub addline {
6733: my ($fname,$hostid,$ip,$newline)=@_;
6734: my $contents;
6735: my $found=0;
6736: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
6737: my $sh;
6738: if ($sh=IO::File->new("$fname.subscription")) {
6739: while (my $subline=<$sh>) {
6740: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
6741: }
6742: $sh->close();
6743: }
6744: $sh=IO::File->new(">$fname.subscription");
6745: if ($contents) { print $sh $contents; }
6746: if ($newline) { print $sh $newline; }
6747: $sh->close();
6748: return $found;
6749: }
6750:
6751: sub get_chat {
6752: my ($cdom,$cname,$udom,$uname,$group)=@_;
6753:
6754: my @entries=();
6755: my $namespace = 'nohist_chatroom';
6756: my $namespace_inroom = 'nohist_inchatroom';
6757: if ($group ne '') {
6758: $namespace .= '_'.$group;
6759: $namespace_inroom .= '_'.$group;
6760: }
6761: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6762: &GDBM_READER());
6763: if ($hashref) {
6764: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6765: &untie_user_hash($hashref);
6766: }
6767: my @participants=();
6768: my $cutoff=time-60;
6769: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
6770: &GDBM_WRCREAT());
6771: if ($hashref) {
6772: $hashref->{$uname.':'.$udom}=time;
6773: foreach my $user (sort(keys(%$hashref))) {
6774: if ($hashref->{$user}>$cutoff) {
6775: push(@participants, 'active_participant:'.$user);
6776: }
6777: }
6778: &untie_user_hash($hashref);
6779: }
6780: return (@participants,@entries);
6781: }
6782:
6783: sub chat_add {
6784: my ($cdom,$cname,$newchat,$group)=@_;
6785: my @entries=();
6786: my $time=time;
6787: my $namespace = 'nohist_chatroom';
6788: my $logfile = 'chatroom.log';
6789: if ($group ne '') {
6790: $namespace .= '_'.$group;
6791: $logfile = 'chatroom_'.$group.'.log';
6792: }
6793: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
6794: &GDBM_WRCREAT());
6795: if ($hashref) {
6796: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
6797: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
6798: my ($thentime,$idnum)=split(/\_/,$lastid);
6799: my $newid=$time.'_000000';
6800: if ($thentime==$time) {
6801: $idnum=~s/^0+//;
6802: $idnum++;
6803: $idnum=substr('000000'.$idnum,-6,6);
6804: $newid=$time.'_'.$idnum;
6805: }
6806: $hashref->{$newid}=$newchat;
6807: my $expired=$time-3600;
6808: foreach my $comment (keys(%$hashref)) {
6809: my ($thistime) = ($comment=~/(\d+)\_/);
6810: if ($thistime<$expired) {
6811: delete $hashref->{$comment};
6812: }
6813: }
6814: {
6815: my $proname=&propath($cdom,$cname);
6816: if (open(CHATLOG,">>$proname/$logfile")) {
6817: print CHATLOG ("$time:".&unescape($newchat)."\n");
6818: }
6819: close(CHATLOG);
6820: }
6821: &untie_user_hash($hashref);
6822: }
6823: }
6824:
6825: sub unsub {
6826: my ($fname,$clientip)=@_;
6827: my $result;
6828: my $unsubs = 0; # Number of successful unsubscribes:
6829:
6830:
6831: # An old way subscriptions were handled was to have a
6832: # subscription marker file:
6833:
6834: Debug("Attempting unlink of $fname.$clientname");
6835: if (unlink("$fname.$clientname")) {
6836: $unsubs++; # Successful unsub via marker file.
6837: }
6838:
6839: # The more modern way to do it is to have a subscription list
6840: # file:
6841:
6842: if (-e "$fname.subscription") {
6843: my $found=&addline($fname,$clientname,$clientip,'');
6844: if ($found) {
6845: $unsubs++;
6846: }
6847: }
6848:
6849: # If either or both of these mechanisms succeeded in unsubscribing a
6850: # resource we can return ok:
6851:
6852: if($unsubs) {
6853: $result = "ok\n";
6854: } else {
6855: $result = "not_subscribed\n";
6856: }
6857:
6858: return $result;
6859: }
6860:
6861: sub currentversion {
6862: my $fname=shift;
6863: my $version=-1;
6864: my $ulsdir='';
6865: if ($fname=~/^(.+)\/[^\/]+$/) {
6866: $ulsdir=$1;
6867: }
6868: my ($fnamere1,$fnamere2);
6869: # remove version if already specified
6870: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
6871: # get the bits that go before and after the version number
6872: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
6873: $fnamere1=$1;
6874: $fnamere2='.'.$2;
6875: }
6876: if (-e $fname) { $version=1; }
6877: if (-e $ulsdir) {
6878: if(-d $ulsdir) {
6879: if (opendir(LSDIR,$ulsdir)) {
6880: my $ulsfn;
6881: while ($ulsfn=readdir(LSDIR)) {
6882: # see if this is a regular file (ignore links produced earlier)
6883: my $thisfile=$ulsdir.'/'.$ulsfn;
6884: unless (-l $thisfile) {
6885: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
6886: if ($1>$version) { $version=$1; }
6887: }
6888: }
6889: }
6890: closedir(LSDIR);
6891: $version++;
6892: }
6893: }
6894: }
6895: return $version;
6896: }
6897:
6898: sub thisversion {
6899: my $fname=shift;
6900: my $version=-1;
6901: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
6902: $version=$1;
6903: }
6904: return $version;
6905: }
6906:
6907: sub subscribe {
6908: my ($userinput,$clientip)=@_;
6909: my $result;
6910: my ($cmd,$fname)=split(/:/,$userinput,2);
6911: my $ownership=&ishome($fname);
6912: if ($ownership eq 'owner') {
6913: # explitly asking for the current version?
6914: unless (-e $fname) {
6915: my $currentversion=¤tversion($fname);
6916: if (&thisversion($fname)==$currentversion) {
6917: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
6918: my $root=$1;
6919: my $extension=$2;
6920: symlink($root.'.'.$extension,
6921: $root.'.'.$currentversion.'.'.$extension);
6922: unless ($extension=~/\.meta$/) {
6923: symlink($root.'.'.$extension.'.meta',
6924: $root.'.'.$currentversion.'.'.$extension.'.meta');
6925: }
6926: }
6927: }
6928: }
6929: if (-e $fname) {
6930: if (-d $fname) {
6931: $result="directory\n";
6932: } else {
6933: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
6934: my $now=time;
6935: my $found=&addline($fname,$clientname,$clientip,
6936: "$clientname:$clientip:$now\n");
6937: if ($found) { $result="$fname\n"; }
6938: # if they were subscribed to only meta data, delete that
6939: # subscription, when you subscribe to a file you also get
6940: # the metadata
6941: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
6942: $fname=~s/\/home\/httpd\/html\/res/raw/;
6943: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
6944: $result="$fname\n";
6945: }
6946: } else {
6947: $result="not_found\n";
6948: }
6949: } else {
6950: $result="rejected\n";
6951: }
6952: return $result;
6953: }
6954: # Change the passwd of a unix user. The caller must have
6955: # first verified that the user is a loncapa user.
6956: #
6957: # Parameters:
6958: # user - Unix user name to change.
6959: # pass - New password for the user.
6960: # Returns:
6961: # ok - if success
6962: # other - Some meaningfule error message string.
6963: # NOTE:
6964: # invokes a setuid script to change the passwd.
6965: sub change_unix_password {
6966: my ($user, $pass) = @_;
6967:
6968: &Debug("change_unix_password");
6969: my $execdir=$perlvar{'lonDaemons'};
6970: &Debug("Opening lcpasswd pipeline");
6971: my $pf = IO::File->new("|$execdir/lcpasswd > "
6972: ."$perlvar{'lonDaemons'}"
6973: ."/logs/lcpasswd.log");
6974: print $pf "$user\n$pass\n$pass\n";
6975: close $pf;
6976: my $err = $?;
6977: return ($err < @passwderrors) ? $passwderrors[$err] :
6978: "pwchange_falure - unknown error";
6979:
6980:
6981: }
6982:
6983:
6984: sub make_passwd_file {
6985: my ($uname, $umode,$npass,$passfilename)=@_;
6986: my $result="ok";
6987: if ($umode eq 'krb4' or $umode eq 'krb5') {
6988: {
6989: my $pf = IO::File->new(">$passfilename");
6990: if ($pf) {
6991: print $pf "$umode:$npass\n";
6992: } else {
6993: $result = "pass_file_failed_error";
6994: }
6995: }
6996: } elsif ($umode eq 'internal') {
6997: my $salt=time;
6998: $salt=substr($salt,6,2);
6999: my $ncpass=crypt($npass,$salt);
7000: {
7001: &Debug("Creating internal auth");
7002: my $pf = IO::File->new(">$passfilename");
7003: if($pf) {
7004: print $pf "internal:$ncpass\n";
7005: } else {
7006: $result = "pass_file_failed_error";
7007: }
7008: }
7009: } elsif ($umode eq 'localauth') {
7010: {
7011: my $pf = IO::File->new(">$passfilename");
7012: if($pf) {
7013: print $pf "localauth:$npass\n";
7014: } else {
7015: $result = "pass_file_failed_error";
7016: }
7017: }
7018: } elsif ($umode eq 'unix') {
7019: {
7020: #
7021: # Don't allow the creation of privileged accounts!!! that would
7022: # be real bad!!!
7023: #
7024: my $uid = getpwnam($uname);
7025: if((defined $uid) && ($uid == 0)) {
7026: &logthis(">>>Attempted to create privilged account blocked");
7027: return "no_priv_account_error\n";
7028: }
7029:
7030: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
7031:
7032: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
7033: {
7034: &Debug("Executing external: ".$execpath);
7035: &Debug("user = ".$uname.", Password =". $npass);
7036: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
7037: print $se "$uname\n";
7038: print $se "$npass\n";
7039: print $se "$npass\n";
7040: print $se "$lc_error_file\n"; # Status -> unique file.
7041: }
7042: if (-r $lc_error_file) {
7043: &Debug("Opening error file: $lc_error_file");
7044: my $error = IO::File->new("< $lc_error_file");
7045: my $useraddok = <$error>;
7046: $error->close;
7047: unlink($lc_error_file);
7048:
7049: chomp $useraddok;
7050:
7051: if($useraddok > 0) {
7052: my $error_text = &lcuseraddstrerror($useraddok);
7053: &logthis("Failed lcuseradd: $error_text");
7054: $result = "lcuseradd_failed:$error_text";
7055: } else {
7056: my $pf = IO::File->new(">$passfilename");
7057: if($pf) {
7058: print $pf "unix:\n";
7059: } else {
7060: $result = "pass_file_failed_error";
7061: }
7062: }
7063: } else {
7064: &Debug("Could not locate lcuseradd error: $lc_error_file");
7065: $result="bug_lcuseradd_no_output_file";
7066: }
7067: }
7068: } elsif ($umode eq 'none') {
7069: {
7070: my $pf = IO::File->new("> $passfilename");
7071: if($pf) {
7072: print $pf "none:\n";
7073: } else {
7074: $result = "pass_file_failed_error";
7075: }
7076: }
7077: } else {
7078: $result="auth_mode_error";
7079: }
7080: return $result;
7081: }
7082:
7083: sub convert_photo {
7084: my ($start,$dest)=@_;
7085: system("convert $start $dest");
7086: }
7087:
7088: sub sethost {
7089: my ($remotereq) = @_;
7090: my (undef,$hostid)=split(/:/,$remotereq);
7091: # ignore sethost if we are already correct
7092: if ($hostid eq $currenthostid) {
7093: return 'ok';
7094: }
7095:
7096: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
7097: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7098: eq &Apache::lonnet::get_host_ip($hostid)) {
7099: $currenthostid =$hostid;
7100: $currentdomainid=&Apache::lonnet::host_domain($hostid);
7101: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
7102: } else {
7103: &logthis("Requested host id $hostid not an alias of ".
7104: $perlvar{'lonHostID'}." refusing connection");
7105: return 'unable_to_set';
7106: }
7107: return 'ok';
7108: }
7109:
7110: sub version {
7111: my ($userinput)=@_;
7112: $remoteVERSION=(split(/:/,$userinput))[1];
7113: return "version:$VERSION";
7114: }
7115:
7116:
7117: # ----------------------------------- POD (plain old documentation, CPAN style)
7118:
7119: =head1 NAME
7120:
7121: lond - "LON Daemon" Server (port "LOND" 5663)
7122:
7123: =head1 SYNOPSIS
7124:
7125: Usage: B<lond>
7126:
7127: Should only be run as user=www. This is a command-line script which
7128: is invoked by B<loncron>. There is no expectation that a typical user
7129: will manually start B<lond> from the command-line. (In other words,
7130: DO NOT START B<lond> YOURSELF.)
7131:
7132: =head1 DESCRIPTION
7133:
7134: There are two characteristics associated with the running of B<lond>,
7135: PROCESS MANAGEMENT (starting, stopping, handling child processes)
7136: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
7137: subscriptions, etc). These are described in two large
7138: sections below.
7139:
7140: B<PROCESS MANAGEMENT>
7141:
7142: Preforker - server who forks first. Runs as a daemon. HUPs.
7143: Uses IDEA encryption
7144:
7145: B<lond> forks off children processes that correspond to the other servers
7146: in the network. Management of these processes can be done at the
7147: parent process level or the child process level.
7148:
7149: B<logs/lond.log> is the location of log messages.
7150:
7151: The process management is now explained in terms of linux shell commands,
7152: subroutines internal to this code, and signal assignments:
7153:
7154: =over 4
7155:
7156: =item *
7157:
7158: PID is stored in B<logs/lond.pid>
7159:
7160: This is the process id number of the parent B<lond> process.
7161:
7162: =item *
7163:
7164: SIGTERM and SIGINT
7165:
7166: Parent signal assignment:
7167: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7168:
7169: Child signal assignment:
7170: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
7171: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
7172: to restart a new child.)
7173:
7174: Command-line invocations:
7175: B<kill> B<-s> SIGTERM I<PID>
7176: B<kill> B<-s> SIGINT I<PID>
7177:
7178: Subroutine B<HUNTSMAN>:
7179: This is only invoked for the B<lond> parent I<PID>.
7180: This kills all the children, and then the parent.
7181: The B<lonc.pid> file is cleared.
7182:
7183: =item *
7184:
7185: SIGHUP
7186:
7187: Current bug:
7188: This signal can only be processed the first time
7189: on the parent process. Subsequent SIGHUP signals
7190: have no effect.
7191:
7192: Parent signal assignment:
7193: $SIG{HUP} = \&HUPSMAN;
7194:
7195: Child signal assignment:
7196: none (nothing happens)
7197:
7198: Command-line invocations:
7199: B<kill> B<-s> SIGHUP I<PID>
7200:
7201: Subroutine B<HUPSMAN>:
7202: This is only invoked for the B<lond> parent I<PID>,
7203: This kills all the children, and then the parent.
7204: The B<lond.pid> file is cleared.
7205:
7206: =item *
7207:
7208: SIGUSR1
7209:
7210: Parent signal assignment:
7211: $SIG{USR1} = \&USRMAN;
7212:
7213: Child signal assignment:
7214: $SIG{USR1}= \&logstatus;
7215:
7216: Command-line invocations:
7217: B<kill> B<-s> SIGUSR1 I<PID>
7218:
7219: Subroutine B<USRMAN>:
7220: When invoked for the B<lond> parent I<PID>,
7221: SIGUSR1 is sent to all the children, and the status of
7222: each connection is logged.
7223:
7224: =item *
7225:
7226: SIGUSR2
7227:
7228: Parent Signal assignment:
7229: $SIG{USR2} = \&UpdateHosts
7230:
7231: Child signal assignment:
7232: NONE
7233:
7234:
7235: =item *
7236:
7237: SIGCHLD
7238:
7239: Parent signal assignment:
7240: $SIG{CHLD} = \&REAPER;
7241:
7242: Child signal assignment:
7243: none
7244:
7245: Command-line invocations:
7246: B<kill> B<-s> SIGCHLD I<PID>
7247:
7248: Subroutine B<REAPER>:
7249: This is only invoked for the B<lond> parent I<PID>.
7250: Information pertaining to the child is removed.
7251: The socket port is cleaned up.
7252:
7253: =back
7254:
7255: B<SERVER-SIDE ACTIVITIES>
7256:
7257: Server-side information can be accepted in an encrypted or non-encrypted
7258: method.
7259:
7260: =over 4
7261:
7262: =item ping
7263:
7264: Query a client in the hosts.tab table; "Are you there?"
7265:
7266: =item pong
7267:
7268: Respond to a ping query.
7269:
7270: =item ekey
7271:
7272: Read in encrypted key, make cipher. Respond with a buildkey.
7273:
7274: =item load
7275:
7276: Respond with CPU load based on a computation upon /proc/loadavg.
7277:
7278: =item currentauth
7279:
7280: Reply with current authentication information (only over an
7281: encrypted channel).
7282:
7283: =item auth
7284:
7285: Only over an encrypted channel, reply as to whether a user's
7286: authentication information can be validated.
7287:
7288: =item passwd
7289:
7290: Allow for a password to be set.
7291:
7292: =item makeuser
7293:
7294: Make a user.
7295:
7296: =item passwd
7297:
7298: Allow for authentication mechanism and password to be changed.
7299:
7300: =item home
7301:
7302: Respond to a question "are you the home for a given user?"
7303:
7304: =item update
7305:
7306: Update contents of a subscribed resource.
7307:
7308: =item unsubscribe
7309:
7310: The server is unsubscribing from a resource.
7311:
7312: =item subscribe
7313:
7314: The server is subscribing to a resource.
7315:
7316: =item log
7317:
7318: Place in B<logs/lond.log>
7319:
7320: =item put
7321:
7322: stores hash in namespace
7323:
7324: =item rolesputy
7325:
7326: put a role into a user's environment
7327:
7328: =item get
7329:
7330: returns hash with keys from array
7331: reference filled in from namespace
7332:
7333: =item eget
7334:
7335: returns hash with keys from array
7336: reference filled in from namesp (encrypts the return communication)
7337:
7338: =item rolesget
7339:
7340: get a role from a user's environment
7341:
7342: =item del
7343:
7344: deletes keys out of array from namespace
7345:
7346: =item keys
7347:
7348: returns namespace keys
7349:
7350: =item dump
7351:
7352: dumps the complete (or key matching regexp) namespace into a hash
7353:
7354: =item store
7355:
7356: stores hash permanently
7357: for this url; hashref needs to be given and should be a \%hashname; the
7358: remaining args aren't required and if they aren't passed or are '' they will
7359: be derived from the ENV
7360:
7361: =item restore
7362:
7363: returns a hash for a given url
7364:
7365: =item querysend
7366:
7367: Tells client about the lonsql process that has been launched in response
7368: to a sent query.
7369:
7370: =item queryreply
7371:
7372: Accept information from lonsql and make appropriate storage in temporary
7373: file space.
7374:
7375: =item idput
7376:
7377: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
7378: for each student, defined perhaps by the institutional Registrar.)
7379:
7380: =item idget
7381:
7382: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
7383: for each student, defined perhaps by the institutional Registrar.)
7384:
7385: =item tmpput
7386:
7387: Accept and store information in temporary space.
7388:
7389: =item tmpget
7390:
7391: Send along temporarily stored information.
7392:
7393: =item ls
7394:
7395: List part of a user's directory.
7396:
7397: =item pushtable
7398:
7399: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
7400: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
7401: must be restored manually in case of a problem with the new table file.
7402: pushtable requires that the request be encrypted and validated via
7403: ValidateManager. The form of the command is:
7404: enc:pushtable tablename <tablecontents> \n
7405: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
7406: cleartext newline.
7407:
7408: =item Hanging up (exit or init)
7409:
7410: What to do when a client tells the server that they (the client)
7411: are leaving the network.
7412:
7413: =item unknown command
7414:
7415: If B<lond> is sent an unknown command (not in the list above),
7416: it replys to the client "unknown_cmd".
7417:
7418:
7419: =item UNKNOWN CLIENT
7420:
7421: If the anti-spoofing algorithm cannot verify the client,
7422: the client is rejected (with a "refused" message sent
7423: to the client, and the connection is closed.
7424:
7425: =back
7426:
7427: =head1 PREREQUISITES
7428:
7429: IO::Socket
7430: IO::File
7431: Apache::File
7432: POSIX
7433: Crypt::IDEA
7434: LWP::UserAgent()
7435: GDBM_File
7436: Authen::Krb4
7437: Authen::Krb5
7438:
7439: =head1 COREQUISITES
7440:
7441: =head1 OSNAMES
7442:
7443: linux
7444:
7445: =head1 SCRIPT CATEGORIES
7446:
7447: Server/Process
7448:
7449: =cut
7450:
7451:
7452: =pod
7453:
7454: =head1 LOG MESSAGES
7455:
7456: The messages below can be emitted in the lond log. This log is located
7457: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
7458: to provide coloring if examined from inside a web page. Some do not.
7459: Where color is used, the colors are; Red for sometihhng to get excited
7460: about and to follow up on. Yellow for something to keep an eye on to
7461: be sure it does not get worse, Green,and Blue for informational items.
7462:
7463: In the discussions below, sometimes reference is made to ~httpd
7464: when describing file locations. There isn't really an httpd
7465: user, however there is an httpd directory that gets installed in the
7466: place that user home directories go. On linux, this is usually
7467: (always?) /home/httpd.
7468:
7469:
7470: Some messages are colorless. These are usually (not always)
7471: Green/Blue color level messages.
7472:
7473: =over 2
7474:
7475: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
7476:
7477: A local connection negotiation was attempted by
7478: a host whose IP address was not 127.0.0.1.
7479: The socket is closed and the child will exit.
7480: lond has three ways to establish an encyrption
7481: key with a client:
7482:
7483: =over 2
7484:
7485: =item local
7486:
7487: The key is written and read from a file.
7488: This is only valid for connections from localhost.
7489:
7490: =item insecure
7491:
7492: The key is generated by the server and
7493: transmitted to the client.
7494:
7495: =item ssl (secure)
7496:
7497: An ssl connection is negotiated with the client,
7498: the key is generated by the server and sent to the
7499: client across this ssl connection before the
7500: ssl connectionis terminated and clear text
7501: transmission resumes.
7502:
7503: =back
7504:
7505: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
7506:
7507: The client is local but has not sent an initialization
7508: string that is the literal "init:local" The connection
7509: is closed and the child exits.
7510:
7511: =item Red CRITICAL Can't get key file <error>
7512:
7513: SSL key negotiation is being attempted but the call to
7514: lonssl::KeyFile failed. This usually means that the
7515: configuration file is not correctly defining or protecting
7516: the directories/files lonCertificateDirectory or
7517: lonnetPrivateKey
7518: <error> is a string that describes the reason that
7519: the key file could not be located.
7520:
7521: =item (Red) CRITICAL Can't get certificates <error>
7522:
7523: SSL key negotiation failed because we were not able to retrives our certificate
7524: or the CA's certificate in the call to lonssl::CertificateFile
7525: <error> is the textual reason this failed. Usual reasons:
7526:
7527: =over 2
7528:
7529: =item Apache config file for loncapa incorrect:
7530:
7531: one of the variables
7532: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
7533: undefined or incorrect
7534:
7535: =item Permission error:
7536:
7537: The directory pointed to by lonCertificateDirectory is not readable by lond
7538:
7539: =item Permission error:
7540:
7541: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
7542:
7543: =item Installation error:
7544:
7545: Either the certificate authority file or the certificate have not
7546: been installed in lonCertificateDirectory.
7547:
7548: =item (Red) CRITICAL SSL Socket promotion failed: <err>
7549:
7550: The promotion of the connection from plaintext to SSL failed
7551: <err> is the reason for the failure. There are two
7552: system calls involved in the promotion (one of which failed),
7553: a dup to produce
7554: a second fd on the raw socket over which the encrypted data
7555: will flow and IO::SOcket::SSL->new_from_fd which creates
7556: the SSL connection on the duped fd.
7557:
7558: =item (Blue) WARNING client did not respond to challenge
7559:
7560: This occurs on an insecure (non SSL) connection negotiation request.
7561: lond generates some number from the time, the PID and sends it to
7562: the client. The client must respond by echoing this information back.
7563: If the client does not do so, that's a violation of the challenge
7564: protocols and the connection will be failed.
7565:
7566: =item (Red) No manager table. Nobody can manage!!
7567:
7568: lond has the concept of privileged hosts that
7569: can perform remote management function such
7570: as update the hosts.tab. The manager hosts
7571: are described in the
7572: ~httpd/lonTabs/managers.tab file.
7573: this message is logged if this file is missing.
7574:
7575:
7576: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
7577:
7578: Reports the successful parse and registration
7579: of a specific manager.
7580:
7581: =item Green existing host <clustername:dnsname>
7582:
7583: The manager host is already defined in the hosts.tab
7584: the information in that table, rather than the info in the
7585: manager table will be used to determine the manager's ip.
7586:
7587: =item (Red) Unable to craete <filename>
7588:
7589: lond has been asked to create new versions of an administrative
7590: file (by a manager). When this is done, the new file is created
7591: in a temp file and then renamed into place so that there are always
7592: usable administrative files, even if the update fails. This failure
7593: message means that the temp file could not be created.
7594: The update is abandoned, and the old file is available for use.
7595:
7596: =item (Green) CopyFile from <oldname> to <newname> failed
7597:
7598: In an update of administrative files, the copy of the existing file to a
7599: backup file failed. The installation of the new file may still succeed,
7600: but there will not be a back up file to rever to (this should probably
7601: be yellow).
7602:
7603: =item (Green) Pushfile: backed up <oldname> to <newname>
7604:
7605: See above, the backup of the old administrative file succeeded.
7606:
7607: =item (Red) Pushfile: Unable to install <filename> <reason>
7608:
7609: The new administrative file could not be installed. In this case,
7610: the old administrative file is still in use.
7611:
7612: =item (Green) Installed new < filename>.
7613:
7614: The new administrative file was successfullly installed.
7615:
7616: =item (Red) Reinitializing lond pid=<pid>
7617:
7618: The lonc child process <pid> will be sent a USR2
7619: signal.
7620:
7621: =item (Red) Reinitializing self
7622:
7623: We've been asked to re-read our administrative files,and
7624: are doing so.
7625:
7626: =item (Yellow) error:Invalid process identifier <ident>
7627:
7628: A reinit command was received, but the target part of the
7629: command was not valid. It must be either
7630: 'lond' or 'lonc' but was <ident>
7631:
7632: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
7633:
7634: Checking to see if lond has been handed a valid edit
7635: command. It is possible the edit command is not valid
7636: in that case there are no log messages to indicate that.
7637:
7638: =item Result of password change for <username> pwchange_success
7639:
7640: The password for <username> was
7641: successfully changed.
7642:
7643: =item Unable to open <user> passwd to change password
7644:
7645: Could not rewrite the
7646: internal password file for a user
7647:
7648: =item Result of password change for <user> : <result>
7649:
7650: A unix password change for <user> was attempted
7651: and the pipe returned <result>
7652:
7653: =item LWP GET: <message> for <fname> (<remoteurl>)
7654:
7655: The lightweight process fetch for a resource failed
7656: with <message> the local filename that should
7657: have existed/been created was <fname> the
7658: corresponding URI: <remoteurl> This is emitted in several
7659: places.
7660:
7661: =item Unable to move <transname> to <destname>
7662:
7663: From fetch_user_file_handler - the user file was replicated but could not
7664: be mv'd to its final location.
7665:
7666: =item Looking for <domain> <username>
7667:
7668: From user_has_session_handler - This should be a Debug call instead
7669: it indicates lond is about to check whether the specified user has a
7670: session active on the specified domain on the local host.
7671:
7672: =item Client <ip> (<name>) hanging up: <input>
7673:
7674: lond has been asked to exit by its client. The <ip> and <name> identify the
7675: client systemand <input> is the full exit command sent to the server.
7676:
7677: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
7678:
7679: A lond child terminated. NOte that this termination can also occur when the
7680: child receives the QUIT or DIE signals. <pid> is the process id of the child,
7681: <hostname> the host lond is working for, and <message> the reason the child died
7682: to the best of our ability to get it (I would guess that any numeric value
7683: represents and errno value). This is immediately followed by
7684:
7685: =item Famous last words: Catching exception - <log>
7686:
7687: Where log is some recent information about the state of the child.
7688:
7689: =item Red CRITICAL: TIME OUT <pid>
7690:
7691: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
7692: doing an HTTP::GET.
7693:
7694: =item child <pid> died
7695:
7696: The reaper caught a SIGCHILD for the lond child process <pid>
7697: This should be modified to also display the IP of the dying child
7698: $children{$pid}
7699:
7700: =item Unknown child 0 died
7701: A child died but the wait for it returned a pid of zero which really should not
7702: ever happen.
7703:
7704: =item Child <which> - <pid> looks like we missed it's death
7705:
7706: When a sigchild is received, the reaper process checks all children to see if they are
7707: alive. If children are dying quite quickly, the lack of signal queuing can mean
7708: that a signal hearalds the death of more than one child. If so this message indicates
7709: which other one died. <which> is the ip of a dead child
7710:
7711: =item Free socket: <shutdownretval>
7712:
7713: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
7714: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
7715: to return anything. This is followed by:
7716:
7717: =item Red CRITICAL: Shutting down
7718:
7719: Just prior to exit.
7720:
7721: =item Free socket: <shutdownretval>
7722:
7723: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
7724: This is followed by:
7725:
7726: =item (Red) CRITICAL: Restarting
7727:
7728: lond is about to exec itself to restart.
7729:
7730: =item (Blue) Updating connections
7731:
7732: (In response to a USR2). All the children (except the one for localhost)
7733: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
7734:
7735: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
7736:
7737: Due to USR2 as above.
7738:
7739: =item (Green) keeping child for ip <ip> (pid = <pid>)
7740:
7741: In response to USR2 as above, the child indicated is not being restarted because
7742: it's assumed that we'll always need a child for the localhost.
7743:
7744:
7745: =item Going to check on the children
7746:
7747: Parent is about to check on the health of the child processes.
7748: Note that this is in response to a USR1 sent to the parent lond.
7749: there may be one or more of the next two messages:
7750:
7751: =item <pid> is dead
7752:
7753: A child that we have in our child hash as alive has evidently died.
7754:
7755: =item Child <pid> did not respond
7756:
7757: In the health check the child <pid> did not update/produce a pid_.txt
7758: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
7759: assumed to be hung in some un-fixable way.
7760:
7761: =item Finished checking children
7762:
7763: Master processs's USR1 processing is cojmplete.
7764:
7765: =item (Red) CRITICAL: ------- Starting ------
7766:
7767: (There are more '-'s on either side). Lond has forked itself off to
7768: form a new session and is about to start actual initialization.
7769:
7770: =item (Green) Attempting to start child (<client>)
7771:
7772: Started a new child process for <client>. Client is IO::Socket object
7773: connected to the child. This was as a result of a TCP/IP connection from a client.
7774:
7775: =item Unable to determine who caller was, getpeername returned nothing
7776:
7777: In child process initialization. either getpeername returned undef or
7778: a zero sized object was returned. Processing continues, but in my opinion,
7779: this should be cause for the child to exit.
7780:
7781: =item Unable to determine clientip
7782:
7783: In child process initialization. The peer address from getpeername was not defined.
7784: The client address is stored as "Unavailable" and processing continues.
7785:
7786: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
7787:
7788: In child initialization. A good connectionw as received from <ip>.
7789:
7790: =over 2
7791:
7792: =item <name>
7793:
7794: is the name of the client from hosts.tab.
7795:
7796: =item <type>
7797:
7798: Is the connection type which is either
7799:
7800: =over 2
7801:
7802: =item manager
7803:
7804: The connection is from a manager node, not in hosts.tab
7805:
7806: =item client
7807:
7808: the connection is from a non-manager in the hosts.tab
7809:
7810: =item both
7811:
7812: The connection is from a manager in the hosts.tab.
7813:
7814: =back
7815:
7816: =back
7817:
7818: =item (Blue) Certificates not installed -- trying insecure auth
7819:
7820: One of the certificate file, key file or
7821: certificate authority file could not be found for a client attempting
7822: SSL connection intiation. COnnection will be attemptied in in-secure mode.
7823: (this would be a system with an up to date lond that has not gotten a
7824: certificate from us).
7825:
7826: =item (Green) Successful local authentication
7827:
7828: A local connection successfully negotiated the encryption key.
7829: In this case the IDEA key is in a file (that is hopefully well protected).
7830:
7831: =item (Green) Successful ssl authentication with <client>
7832:
7833: The client (<client> is the peer's name in hosts.tab), has successfully
7834: negotiated an SSL connection with this child process.
7835:
7836: =item (Green) Successful insecure authentication with <client>
7837:
7838:
7839: The client has successfully negotiated an insecure connection withthe child process.
7840:
7841: =item (Yellow) Attempted insecure connection disallowed
7842:
7843: The client attempted and failed to successfully negotiate a successful insecure
7844: connection. This can happen either because the variable londAllowInsecure is false
7845: or undefined, or becuse the child did not successfully echo back the challenge
7846: string.
7847:
7848:
7849: =back
7850:
7851:
7852: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom