1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.489.2.8 2013/08/10 14:20:52 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18:
19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20: # GNU General Public License for more details.
21: #
22: # You should have received a copy of the GNU General Public License
23: # along with LON-CAPA; if not, write to the Free Software
24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25: #
26: # /home/httpd/html/adm/gpl.txt
27: #
28:
29:
30: # http://www.lon-capa.org/
31: #
32:
33: use strict;
34: use lib '/home/httpd/lib/perl/';
35: use LONCAPA;
36: use LONCAPA::Configuration;
37: use LONCAPA::Lond;
38:
39: use IO::Socket;
40: use IO::File;
41: #use Apache::File;
42: use POSIX;
43: use Crypt::IDEA;
44: use LWP::UserAgent();
45: use Digest::MD5 qw(md5_hex);
46: use GDBM_File;
47: use Authen::Krb5;
48: use localauth;
49: use localenroll;
50: use localstudentphoto;
51: use File::Copy;
52: use File::Find;
53: use LONCAPA::lonlocal;
54: use LONCAPA::lonssl;
55: use Fcntl qw(:flock);
56: use Apache::lonnet;
57: use Mail::Send;
58:
59: my $DEBUG = 0; # Non zero to enable debug log entries.
60:
61: my $status='';
62: my $lastlog='';
63:
64: my $VERSION='$Revision: 1.489.2.8 $'; #' stupid emacs
65: my $remoteVERSION;
66: my $currenthostid="default";
67: my $currentdomainid;
68:
69: my $client;
70: my $clientip; # IP address of client.
71: my $clientname; # LonCAPA name of client.
72: my $clientversion; # LonCAPA version running on client.
73: my $clienthomedom; # LonCAPA domain of homeID for client.
74: # primary library server.
75:
76: my $server;
77:
78: my $keymode;
79:
80: my $cipher; # Cipher key negotiated with client
81: my $tmpsnum = 0; # Id of tmpputs.
82:
83: #
84: # Connection type is:
85: # client - All client actions are allowed
86: # manager - only management functions allowed.
87: # both - Both management and client actions are allowed
88: #
89:
90: my $ConnectionType;
91:
92: my %managers; # Ip -> manager names
93:
94: my %perlvar; # Will have the apache conf defined perl vars.
95:
96: my $dist;
97:
98: #
99: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
100: # Each element of the hash contains a reference to an array that contains:
101: # A reference to a sub that executes the request corresponding to the keyword.
102: # A flag that is true if the request must be encoded to be acceptable.
103: # A mask with bits as follows:
104: # CLIENT_OK - Set when the function is allowed by ordinary clients
105: # MANAGER_OK - Set when the function is allowed to manager clients.
106: #
107: my $CLIENT_OK = 1;
108: my $MANAGER_OK = 2;
109: my %Dispatcher;
110:
111:
112: #
113: # The array below are password error strings."
114: #
115: my $lastpwderror = 13; # Largest error number from lcpasswd.
116: my @passwderrors = ("ok",
117: "pwchange_failure - lcpasswd must be run as user 'www'",
118: "pwchange_failure - lcpasswd got incorrect number of arguments",
119: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
120: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
121: "pwchange_failure - lcpasswd User does not exist.",
122: "pwchange_failure - lcpasswd Incorrect current passwd",
123: "pwchange_failure - lcpasswd Unable to su to root.",
124: "pwchange_failure - lcpasswd Cannot set new passwd.",
125: "pwchange_failure - lcpasswd Username has invalid characters",
126: "pwchange_failure - lcpasswd Invalid characters in password",
127: "pwchange_failure - lcpasswd User already exists",
128: "pwchange_failure - lcpasswd Something went wrong with user addition.",
129: "pwchange_failure - lcpasswd Password mismatch",
130: "pwchange_failure - lcpasswd Error filename is invalid");
131:
132:
133: # This array are the errors from lcinstallfile:
134:
135: my @installerrors = ("ok",
136: "Initial user id of client not that of www",
137: "Usage error, not enough command line arguments",
138: "Source filename does not exist",
139: "Destination filename does not exist",
140: "Some file operation failed",
141: "Invalid table filename."
142: );
143:
144: #
145: # Statistics that are maintained and dislayed in the status line.
146: #
147: my $Transactions = 0; # Number of attempted transactions.
148: my $Failures = 0; # Number of transcations failed.
149:
150: # ResetStatistics:
151: # Resets the statistics counters:
152: #
153: sub ResetStatistics {
154: $Transactions = 0;
155: $Failures = 0;
156: }
157:
158: #------------------------------------------------------------------------
159: #
160: # LocalConnection
161: # Completes the formation of a locally authenticated connection.
162: # This function will ensure that the 'remote' client is really the
163: # local host. If not, the connection is closed, and the function fails.
164: # If so, initcmd is parsed for the name of a file containing the
165: # IDEA session key. The fie is opened, read, deleted and the session
166: # key returned to the caller.
167: #
168: # Parameters:
169: # $Socket - Socket open on client.
170: # $initcmd - The full text of the init command.
171: #
172: # Returns:
173: # IDEA session key on success.
174: # undef on failure.
175: #
176: sub LocalConnection {
177: my ($Socket, $initcmd) = @_;
178: Debug("Attempting local connection: $initcmd client: $clientip");
179: if($clientip ne "127.0.0.1") {
180: &logthis('<font color="red"> LocalConnection rejecting non local: '
181: ."$clientip ne 127.0.0.1 </font>");
182: close $Socket;
183: return undef;
184: } else {
185: chomp($initcmd); # Get rid of \n in filename.
186: my ($init, $type, $name) = split(/:/, $initcmd);
187: Debug(" Init command: $init $type $name ");
188:
189: # Require that $init = init, and $type = local: Otherwise
190: # the caller is insane:
191:
192: if(($init ne "init") && ($type ne "local")) {
193: &logthis('<font color = "red"> LocalConnection: caller is insane! '
194: ."init = $init, and type = $type </font>");
195: close($Socket);;
196: return undef;
197:
198: }
199: # Now get the key filename:
200:
201: my $IDEAKey = lonlocal::ReadKeyFile($name);
202: return $IDEAKey;
203: }
204: }
205: #------------------------------------------------------------------------------
206: #
207: # SSLConnection
208: # Completes the formation of an ssh authenticated connection. The
209: # socket is promoted to an ssl socket. If this promotion and the associated
210: # certificate exchange are successful, the IDEA key is generated and sent
211: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
212: # the caller after the SSL tunnel is torn down.
213: #
214: # Parameters:
215: # Name Type Purpose
216: # $Socket IO::Socket::INET Plaintext socket.
217: #
218: # Returns:
219: # IDEA key on success.
220: # undef on failure.
221: #
222: sub SSLConnection {
223: my $Socket = shift;
224:
225: Debug("SSLConnection: ");
226: my $KeyFile = lonssl::KeyFile();
227: if(!$KeyFile) {
228: my $err = lonssl::LastError();
229: &logthis("<font color=\"red\"> CRITICAL"
230: ."Can't get key file $err </font>");
231: return undef;
232: }
233: my ($CACertificate,
234: $Certificate) = lonssl::CertificateFile();
235:
236:
237: # If any of the key, certificate or certificate authority
238: # certificate filenames are not defined, this can't work.
239:
240: if((!$Certificate) || (!$CACertificate)) {
241: my $err = lonssl::LastError();
242: &logthis("<font color=\"red\"> CRITICAL"
243: ."Can't get certificates: $err </font>");
244:
245: return undef;
246: }
247: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
248:
249: # Indicate to our peer that we can procede with
250: # a transition to ssl authentication:
251:
252: print $Socket "ok:ssl\n";
253:
254: Debug("Approving promotion -> ssl");
255: # And do so:
256:
257: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
258: $CACertificate,
259: $Certificate,
260: $KeyFile);
261: if(! ($SSLSocket) ) { # SSL socket promotion failed.
262: my $err = lonssl::LastError();
263: &logthis("<font color=\"red\"> CRITICAL "
264: ."SSL Socket promotion failed: $err </font>");
265: return undef;
266: }
267: Debug("SSL Promotion successful");
268:
269: #
270: # The only thing we'll use the socket for is to send the IDEA key
271: # to the peer:
272:
273: my $Key = lonlocal::CreateCipherKey();
274: print $SSLSocket "$Key\n";
275:
276: lonssl::Close($SSLSocket);
277:
278: Debug("Key exchange complete: $Key");
279:
280: return $Key;
281: }
282: #
283: # InsecureConnection:
284: # If insecure connections are allowd,
285: # exchange a challenge with the client to 'validate' the
286: # client (not really, but that's the protocol):
287: # We produce a challenge string that's sent to the client.
288: # The client must then echo the challenge verbatim to us.
289: #
290: # Parameter:
291: # Socket - Socket open on the client.
292: # Returns:
293: # 1 - success.
294: # 0 - failure (e.g.mismatch or insecure not allowed).
295: #
296: sub InsecureConnection {
297: my $Socket = shift;
298:
299: # Don't even start if insecure connections are not allowed.
300:
301: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
302: return 0;
303: }
304:
305: # Fabricate a challenge string and send it..
306:
307: my $challenge = "$$".time; # pid + time.
308: print $Socket "$challenge\n";
309: &status("Waiting for challenge reply");
310:
311: my $answer = <$Socket>;
312: $answer =~s/\W//g;
313: if($challenge eq $answer) {
314: return 1;
315: } else {
316: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
317: &status("No challenge reqply");
318: return 0;
319: }
320:
321:
322: }
323: #
324: # Safely execute a command (as long as it's not a shel command and doesn
325: # not require/rely on shell escapes. The function operates by doing a
326: # a pipe based fork and capturing stdout and stderr from the pipe.
327: #
328: # Formal Parameters:
329: # $line - A line of text to be executed as a command.
330: # Returns:
331: # The output from that command. If the output is multiline the caller
332: # must know how to split up the output.
333: #
334: #
335: sub execute_command {
336: my ($line) = @_;
337: my @words = split(/\s/, $line); # Bust the command up into words.
338: my $output = "";
339:
340: my $pid = open(CHILD, "-|");
341:
342: if($pid) { # Parent process
343: Debug("In parent process for execute_command");
344: my @data = <CHILD>; # Read the child's outupt...
345: close CHILD;
346: foreach my $output_line (@data) {
347: Debug("Adding $output_line");
348: $output .= $output_line; # Presumably has a \n on it.
349: }
350:
351: } else { # Child process
352: close (STDERR);
353: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
354: exec(@words); # won't return.
355: }
356: return $output;
357: }
358:
359:
360: # GetCertificate: Given a transaction that requires a certificate,
361: # this function will extract the certificate from the transaction
362: # request. Note that at this point, the only concept of a certificate
363: # is the hostname to which we are connected.
364: #
365: # Parameter:
366: # request - The request sent by our client (this parameterization may
367: # need to change when we really use a certificate granting
368: # authority.
369: #
370: sub GetCertificate {
371: my $request = shift;
372:
373: return $clientip;
374: }
375:
376: #
377: # Return true if client is a manager.
378: #
379: sub isManager {
380: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
381: }
382: #
383: # Return tru if client can do client functions
384: #
385: sub isClient {
386: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
387: }
388:
389:
390: #
391: # ReadManagerTable: Reads in the current manager table. For now this is
392: # done on each manager authentication because:
393: # - These authentications are not frequent
394: # - This allows dynamic changes to the manager table
395: # without the need to signal to the lond.
396: #
397: sub ReadManagerTable {
398:
399: &Debug("Reading manager table");
400: # Clean out the old table first..
401:
402: foreach my $key (keys %managers) {
403: delete $managers{$key};
404: }
405:
406: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
407: if (!open (MANAGERS, $tablename)) {
408: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
409: if (&Apache::lonnet::is_LC_dns($hostname)) {
410: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
411: }
412: return;
413: }
414: while(my $host = <MANAGERS>) {
415: chomp($host);
416: if ($host =~ "^#") { # Comment line.
417: next;
418: }
419: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
420: # The entry is of the form:
421: # cluname:hostname
422: # cluname - A 'cluster hostname' is needed in order to negotiate
423: # the host key.
424: # hostname- The dns name of the host.
425: #
426: my($cluname, $dnsname) = split(/:/, $host);
427:
428: my $ip = gethostbyname($dnsname);
429: if(defined($ip)) { # bad names don't deserve entry.
430: my $hostip = inet_ntoa($ip);
431: $managers{$hostip} = $cluname;
432: logthis('<font color="green"> registering manager '.
433: "$dnsname as $cluname with $hostip </font>\n");
434: }
435: } else {
436: logthis('<font color="green"> existing host'." $host</font>\n");
437: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
438: }
439: }
440: }
441:
442: #
443: # ValidManager: Determines if a given certificate represents a valid manager.
444: # in this primitive implementation, the 'certificate' is
445: # just the connecting loncapa client name. This is checked
446: # against a valid client list in the configuration.
447: #
448: #
449: sub ValidManager {
450: my $certificate = shift;
451:
452: return isManager;
453: }
454: #
455: # CopyFile: Called as part of the process of installing a
456: # new configuration file. This function copies an existing
457: # file to a backup file.
458: # Parameters:
459: # oldfile - Name of the file to backup.
460: # newfile - Name of the backup file.
461: # Return:
462: # 0 - Failure (errno has failure reason).
463: # 1 - Success.
464: #
465: sub CopyFile {
466:
467: my ($oldfile, $newfile) = @_;
468:
469: if (! copy($oldfile,$newfile)) {
470: return 0;
471: }
472: chmod(0660, $newfile);
473: return 1;
474: }
475: #
476: # Host files are passed out with externally visible host IPs.
477: # If, for example, we are behind a fire-wall or NAT host, our
478: # internally visible IP may be different than the externally
479: # visible IP. Therefore, we always adjust the contents of the
480: # host file so that the entry for ME is the IP that we believe
481: # we have. At present, this is defined as the entry that
482: # DNS has for us. If by some chance we are not able to get a
483: # DNS translation for us, then we assume that the host.tab file
484: # is correct.
485: # BUGBUGBUG - in the future, we really should see if we can
486: # easily query the interface(s) instead.
487: # Parameter(s):
488: # contents - The contents of the host.tab to check.
489: # Returns:
490: # newcontents - The adjusted contents.
491: #
492: #
493: sub AdjustHostContents {
494: my $contents = shift;
495: my $adjusted;
496: my $me = $perlvar{'lonHostID'};
497:
498: foreach my $line (split(/\n/,$contents)) {
499: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
500: ($line =~ /^\s*\^/))) {
501: chomp($line);
502: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
503: if ($id eq $me) {
504: my $ip = gethostbyname($name);
505: my $ipnew = inet_ntoa($ip);
506: $ip = $ipnew;
507: # Reconstruct the host line and append to adjusted:
508:
509: my $newline = "$id:$domain:$role:$name:$ip";
510: if($maxcon ne "") { # Not all hosts have loncnew tuning params
511: $newline .= ":$maxcon:$idleto:$mincon";
512: }
513: $adjusted .= $newline."\n";
514:
515: } else { # Not me, pass unmodified.
516: $adjusted .= $line."\n";
517: }
518: } else { # Blank or comment never re-written.
519: $adjusted .= $line."\n"; # Pass blanks and comments as is.
520: }
521: }
522: return $adjusted;
523: }
524: #
525: # InstallFile: Called to install an administrative file:
526: # - The file is created int a temp directory called <name>.tmp
527: # - lcinstall file is called to install the file.
528: # since the web app has no direct write access to the table directory
529: #
530: # Parameters:
531: # Name of the file
532: # File Contents.
533: # Return:
534: # nonzero - success.
535: # 0 - failure and $! has an errno.
536: # Assumptions:
537: # File installtion is a relatively infrequent
538: #
539: sub InstallFile {
540:
541: my ($Filename, $Contents) = @_;
542: # my $TempFile = $Filename.".tmp";
543: my $exedir = $perlvar{'lonDaemons'};
544: my $tmpdir = $exedir.'/tmp/';
545: my $TempFile = $tmpdir."TempTableFile.tmp";
546:
547: # Open the file for write:
548:
549: my $fh = IO::File->new("> $TempFile"); # Write to temp.
550: if(!(defined $fh)) {
551: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
552: return 0;
553: }
554: # write the contents of the file:
555:
556: print $fh ($Contents);
557: $fh->close; # In case we ever have a filesystem w. locking
558:
559: chmod(0664, $TempFile); # Everyone can write it.
560:
561: # Use lcinstall file to put the file in the table directory...
562:
563: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
564: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
565: close $pf;
566: my $err = $?;
567: &Debug("Status is $err");
568: if ($err != 0) {
569: my $msg = $err;
570: if ($err < @installerrors) {
571: $msg = $installerrors[$err];
572: }
573: &logthis("Install failed for table file $Filename : $msg");
574: return 0;
575: }
576:
577: # Remove the temp file:
578:
579: unlink($TempFile);
580:
581: return 1;
582: }
583:
584:
585: #
586: # ConfigFileFromSelector: converts a configuration file selector
587: # into a configuration file pathname.
588: # Supports the following file selectors:
589: # hosts, domain, dns_hosts, dns_domain
590: #
591: #
592: # Parameters:
593: # selector - Configuration file selector.
594: # Returns:
595: # Full path to the file or undef if the selector is invalid.
596: #
597: sub ConfigFileFromSelector {
598: my $selector = shift;
599: my $tablefile;
600:
601: my $tabledir = $perlvar{'lonTabDir'}.'/';
602: if (($selector eq "hosts") || ($selector eq "domain") ||
603: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
604: $tablefile = $tabledir.$selector.'.tab';
605: }
606: return $tablefile;
607: }
608: #
609: # PushFile: Called to do an administrative push of a file.
610: # - Ensure the file being pushed is one we support.
611: # - Backup the old file to <filename.saved>
612: # - Separate the contents of the new file out from the
613: # rest of the request.
614: # - Write the new file.
615: # Parameter:
616: # Request - The entire user request. This consists of a : separated
617: # string pushfile:tablename:contents.
618: # NOTE: The contents may have :'s in it as well making things a bit
619: # more interesting... but not much.
620: # Returns:
621: # String to send to client ("ok" or "refused" if bad file).
622: #
623: sub PushFile {
624: my $request = shift;
625: my ($command, $filename, $contents) = split(":", $request, 3);
626: &Debug("PushFile");
627:
628: # At this point in time, pushes for only the following tables are
629: # supported:
630: # hosts.tab ($filename eq host).
631: # domain.tab ($filename eq domain).
632: # dns_hosts.tab ($filename eq dns_host).
633: # dns_domain.tab ($filename eq dns_domain).
634: # Construct the destination filename or reject the request.
635: #
636: # lonManage is supposed to ensure this, however this session could be
637: # part of some elaborate spoof that managed somehow to authenticate.
638: #
639:
640:
641: my $tablefile = ConfigFileFromSelector($filename);
642: if(! (defined $tablefile)) {
643: return "refused";
644: }
645:
646: # If the file being pushed is the host file, we adjust the entry for ourself so that the
647: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
648: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
649: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
650: # that possibilty.
651:
652: if($filename eq "host") {
653: $contents = AdjustHostContents($contents);
654: }
655:
656: # Install the new file:
657:
658: &logthis("Installing new $tablefile contents:\n$contents");
659: if(!InstallFile($tablefile, $contents)) {
660: &logthis('<font color="red"> Pushfile: unable to install '
661: .$tablefile." $! </font>");
662: return "error:$!";
663: } else {
664: &logthis('<font color="green"> Installed new '.$tablefile
665: ." - transaction by: $clientname ($clientip)</font>");
666: my $adminmail = $perlvar{'lonAdmEMail'};
667: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
668: if ($admindom ne '') {
669: my %domconfig =
670: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
671: if (ref($domconfig{'contacts'}) eq 'HASH') {
672: if ($domconfig{'contacts'}{'adminemail'} ne '') {
673: $adminmail = $domconfig{'contacts'}{'adminemail'};
674: }
675: }
676: }
677: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
678: my $msg = new Mail::Send;
679: $msg->to($adminmail);
680: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
681: $msg->add('Content-type','text/plain; charset=UTF-8');
682: if (my $fh = $msg->open()) {
683: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
684: "$clientname ($clientip)\n";
685: $fh->close;
686: }
687: }
688: }
689:
690: # Indicate success:
691:
692: return "ok";
693:
694: }
695:
696: #
697: # Called to re-init either lonc or lond.
698: #
699: # Parameters:
700: # request - The full request by the client. This is of the form
701: # reinit:<process>
702: # where <process> is allowed to be either of
703: # lonc or lond
704: #
705: # Returns:
706: # The string to be sent back to the client either:
707: # ok - Everything worked just fine.
708: # error:why - There was a failure and why describes the reason.
709: #
710: #
711: sub ReinitProcess {
712: my $request = shift;
713:
714:
715: # separate the request (reinit) from the process identifier and
716: # validate it producing the name of the .pid file for the process.
717: #
718: #
719: my ($junk, $process) = split(":", $request);
720: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
721: if($process eq 'lonc') {
722: $processpidfile = $processpidfile."lonc.pid";
723: if (!open(PIDFILE, "< $processpidfile")) {
724: return "error:Open failed for $processpidfile";
725: }
726: my $loncpid = <PIDFILE>;
727: close(PIDFILE);
728: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
729: ."</font>");
730: kill("USR2", $loncpid);
731: } elsif ($process eq 'lond') {
732: logthis('<font color="red"> Reinitializing self (lond) </font>');
733: &UpdateHosts; # Lond is us!!
734: } else {
735: &logthis('<font color="yellow" Invalid reinit request for '.$process
736: ."</font>");
737: return "error:Invalid process identifier $process";
738: }
739: return 'ok';
740: }
741: # Validate a line in a configuration file edit script:
742: # Validation includes:
743: # - Ensuring the command is valid.
744: # - Ensuring the command has sufficient parameters
745: # Parameters:
746: # scriptline - A line to validate (\n has been stripped for what it's worth).
747: #
748: # Return:
749: # 0 - Invalid scriptline.
750: # 1 - Valid scriptline
751: # NOTE:
752: # Only the command syntax is checked, not the executability of the
753: # command.
754: #
755: sub isValidEditCommand {
756: my $scriptline = shift;
757:
758: # Line elements are pipe separated:
759:
760: my ($command, $key, $newline) = split(/\|/, $scriptline);
761: &logthis('<font color="green"> isValideditCommand checking: '.
762: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
763:
764: if ($command eq "delete") {
765: #
766: # key with no newline.
767: #
768: if( ($key eq "") || ($newline ne "")) {
769: return 0; # Must have key but no newline.
770: } else {
771: return 1; # Valid syntax.
772: }
773: } elsif ($command eq "replace") {
774: #
775: # key and newline:
776: #
777: if (($key eq "") || ($newline eq "")) {
778: return 0;
779: } else {
780: return 1;
781: }
782: } elsif ($command eq "append") {
783: if (($key ne "") && ($newline eq "")) {
784: return 1;
785: } else {
786: return 0;
787: }
788: } else {
789: return 0; # Invalid command.
790: }
791: return 0; # Should not get here!!!
792: }
793: #
794: # ApplyEdit - Applies an edit command to a line in a configuration
795: # file. It is the caller's responsiblity to validate the
796: # edit line.
797: # Parameters:
798: # $directive - A single edit directive to apply.
799: # Edit directives are of the form:
800: # append|newline - Appends a new line to the file.
801: # replace|key|newline - Replaces the line with key value 'key'
802: # delete|key - Deletes the line with key value 'key'.
803: # $editor - A config file editor object that contains the
804: # file being edited.
805: #
806: sub ApplyEdit {
807:
808: my ($directive, $editor) = @_;
809:
810: # Break the directive down into its command and its parameters
811: # (at most two at this point. The meaning of the parameters, if in fact
812: # they exist depends on the command).
813:
814: my ($command, $p1, $p2) = split(/\|/, $directive);
815:
816: if($command eq "append") {
817: $editor->Append($p1); # p1 - key p2 null.
818: } elsif ($command eq "replace") {
819: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
820: } elsif ($command eq "delete") {
821: $editor->DeleteLine($p1); # p1 - key p2 null.
822: } else { # Should not get here!!!
823: die "Invalid command given to ApplyEdit $command"
824: }
825: }
826: #
827: # AdjustOurHost:
828: # Adjusts a host file stored in a configuration file editor object
829: # for the true IP address of this host. This is necessary for hosts
830: # that live behind a firewall.
831: # Those hosts have a publicly distributed IP of the firewall, but
832: # internally must use their actual IP. We assume that a given
833: # host only has a single IP interface for now.
834: # Formal Parameters:
835: # editor - The configuration file editor to adjust. This
836: # editor is assumed to contain a hosts.tab file.
837: # Strategy:
838: # - Figure out our hostname.
839: # - Lookup the entry for this host.
840: # - Modify the line to contain our IP
841: # - Do a replace for this host.
842: sub AdjustOurHost {
843: my $editor = shift;
844:
845: # figure out who I am.
846:
847: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
848:
849: # Get my host file entry.
850:
851: my $ConfigLine = $editor->Find($myHostName);
852: if(! (defined $ConfigLine)) {
853: die "AdjustOurHost - no entry for me in hosts file $myHostName";
854: }
855: # figure out my IP:
856: # Use the config line to get my hostname.
857: # Use gethostbyname to translate that into an IP address.
858: #
859: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
860: #
861: # Reassemble the config line from the elements in the list.
862: # Note that if the loncnew items were not present before, they will
863: # be now even if they would be empty
864: #
865: my $newConfigLine = $id;
866: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
867: $newConfigLine .= ":".$item;
868: }
869: # Replace the line:
870:
871: $editor->ReplaceLine($id, $newConfigLine);
872:
873: }
874: #
875: # ReplaceConfigFile:
876: # Replaces a configuration file with the contents of a
877: # configuration file editor object.
878: # This is done by:
879: # - Copying the target file to <filename>.old
880: # - Writing the new file to <filename>.tmp
881: # - Moving <filename.tmp> -> <filename>
882: # This laborious process ensures that the system is never without
883: # a configuration file that's at least valid (even if the contents
884: # may be dated).
885: # Parameters:
886: # filename - Name of the file to modify... this is a full path.
887: # editor - Editor containing the file.
888: #
889: sub ReplaceConfigFile {
890:
891: my ($filename, $editor) = @_;
892:
893: CopyFile ($filename, $filename.".old");
894:
895: my $contents = $editor->Get(); # Get the contents of the file.
896:
897: InstallFile($filename, $contents);
898: }
899: #
900: #
901: # Called to edit a configuration table file
902: # Parameters:
903: # request - The entire command/request sent by lonc or lonManage
904: # Return:
905: # The reply to send to the client.
906: #
907: sub EditFile {
908: my $request = shift;
909:
910: # Split the command into it's pieces: edit:filetype:script
911:
912: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
913:
914: # Check the pre-coditions for success:
915:
916: if($cmd != "edit") { # Something is amiss afoot alack.
917: return "error:edit request detected, but request != 'edit'\n";
918: }
919: if( ($filetype ne "hosts") &&
920: ($filetype ne "domain")) {
921: return "error:edit requested with invalid file specifier: $filetype \n";
922: }
923:
924: # Split the edit script and check it's validity.
925:
926: my @scriptlines = split(/\n/, $script); # one line per element.
927: my $linecount = scalar(@scriptlines);
928: for(my $i = 0; $i < $linecount; $i++) {
929: chomp($scriptlines[$i]);
930: if(!isValidEditCommand($scriptlines[$i])) {
931: return "error:edit with bad script line: '$scriptlines[$i]' \n";
932: }
933: }
934:
935: # Execute the edit operation.
936: # - Create a config file editor for the appropriate file and
937: # - execute each command in the script:
938: #
939: my $configfile = ConfigFileFromSelector($filetype);
940: if (!(defined $configfile)) {
941: return "refused\n";
942: }
943: my $editor = ConfigFileEdit->new($configfile);
944:
945: for (my $i = 0; $i < $linecount; $i++) {
946: ApplyEdit($scriptlines[$i], $editor);
947: }
948: # If the file is the host file, ensure that our host is
949: # adjusted to have our ip:
950: #
951: if($filetype eq "host") {
952: AdjustOurHost($editor);
953: }
954: # Finally replace the current file with our file.
955: #
956: ReplaceConfigFile($configfile, $editor);
957:
958: return "ok\n";
959: }
960:
961: # read_profile
962: #
963: # Returns a set of specific entries from a user's profile file.
964: # this is a utility function that is used by both get_profile_entry and
965: # get_profile_entry_encrypted.
966: #
967: # Parameters:
968: # udom - Domain in which the user exists.
969: # uname - User's account name (loncapa account)
970: # namespace - The profile namespace to open.
971: # what - A set of & separated queries.
972: # Returns:
973: # If all ok: - The string that needs to be shipped back to the user.
974: # If failure - A string that starts with error: followed by the failure
975: # reason.. note that this probabyl gets shipped back to the
976: # user as well.
977: #
978: sub read_profile {
979: my ($udom, $uname, $namespace, $what) = @_;
980:
981: my $hashref = &tie_user_hash($udom, $uname, $namespace,
982: &GDBM_READER());
983: if ($hashref) {
984: my @queries=split(/\&/,$what);
985: if ($namespace eq 'roles') {
986: @queries = map { &unescape($_); } @queries;
987: }
988: my $qresult='';
989:
990: for (my $i=0;$i<=$#queries;$i++) {
991: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
992: }
993: $qresult=~s/\&$//; # Remove trailing & from last lookup.
994: if (&untie_user_hash($hashref)) {
995: return $qresult;
996: } else {
997: return "error: ".($!+0)." untie (GDBM) Failed";
998: }
999: } else {
1000: if ($!+0 == 2) {
1001: return "error:No such file or GDBM reported bad block error";
1002: } else {
1003: return "error: ".($!+0)." tie (GDBM) Failed";
1004: }
1005: }
1006:
1007: }
1008: #--------------------- Request Handlers --------------------------------------------
1009: #
1010: # By convention each request handler registers itself prior to the sub
1011: # declaration:
1012: #
1013:
1014: #++
1015: #
1016: # Handles ping requests.
1017: # Parameters:
1018: # $cmd - the actual keyword that invoked us.
1019: # $tail - the tail of the request that invoked us.
1020: # $replyfd- File descriptor connected to the client
1021: # Implicit Inputs:
1022: # $currenthostid - Global variable that carries the name of the host we are
1023: # known as.
1024: # Returns:
1025: # 1 - Ok to continue processing.
1026: # 0 - Program should exit.
1027: # Side effects:
1028: # Reply information is sent to the client.
1029: sub ping_handler {
1030: my ($cmd, $tail, $client) = @_;
1031: Debug("$cmd $tail $client .. $currenthostid:");
1032:
1033: Reply( $client,\$currenthostid,"$cmd:$tail");
1034:
1035: return 1;
1036: }
1037: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1038:
1039: #++
1040: #
1041: # Handles pong requests. Pong replies with our current host id, and
1042: # the results of a ping sent to us via our lonc.
1043: #
1044: # Parameters:
1045: # $cmd - the actual keyword that invoked us.
1046: # $tail - the tail of the request that invoked us.
1047: # $replyfd- File descriptor connected to the client
1048: # Implicit Inputs:
1049: # $currenthostid - Global variable that carries the name of the host we are
1050: # connected to.
1051: # Returns:
1052: # 1 - Ok to continue processing.
1053: # 0 - Program should exit.
1054: # Side effects:
1055: # Reply information is sent to the client.
1056: sub pong_handler {
1057: my ($cmd, $tail, $replyfd) = @_;
1058:
1059: my $reply=&Apache::lonnet::reply("ping",$clientname);
1060: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1061: return 1;
1062: }
1063: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1064:
1065: #++
1066: # Called to establish an encrypted session key with the remote client.
1067: # Note that with secure lond, in most cases this function is never
1068: # invoked. Instead, the secure session key is established either
1069: # via a local file that's locked down tight and only lives for a short
1070: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1071: # bits from /dev/urandom, rather than the predictable pattern used by
1072: # by this sub. This sub is only used in the old-style insecure
1073: # key negotiation.
1074: # Parameters:
1075: # $cmd - the actual keyword that invoked us.
1076: # $tail - the tail of the request that invoked us.
1077: # $replyfd- File descriptor connected to the client
1078: # Implicit Inputs:
1079: # $currenthostid - Global variable that carries the name of the host
1080: # known as.
1081: # $clientname - Global variable that carries the name of the host we're connected to.
1082: # Returns:
1083: # 1 - Ok to continue processing.
1084: # 0 - Program should exit.
1085: # Implicit Outputs:
1086: # Reply information is sent to the client.
1087: # $cipher is set with a reference to a new IDEA encryption object.
1088: #
1089: sub establish_key_handler {
1090: my ($cmd, $tail, $replyfd) = @_;
1091:
1092: my $buildkey=time.$$.int(rand 100000);
1093: $buildkey=~tr/1-6/A-F/;
1094: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1095: my $key=$currenthostid.$clientname;
1096: $key=~tr/a-z/A-Z/;
1097: $key=~tr/G-P/0-9/;
1098: $key=~tr/Q-Z/0-9/;
1099: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1100: $key=substr($key,0,32);
1101: my $cipherkey=pack("H32",$key);
1102: $cipher=new IDEA $cipherkey;
1103: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1104:
1105: return 1;
1106:
1107: }
1108: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1109:
1110: # Handler for the load command. Returns the current system load average
1111: # to the requestor.
1112: #
1113: # Parameters:
1114: # $cmd - the actual keyword that invoked us.
1115: # $tail - the tail of the request that invoked us.
1116: # $replyfd- File descriptor connected to the client
1117: # Implicit Inputs:
1118: # $currenthostid - Global variable that carries the name of the host
1119: # known as.
1120: # $clientname - Global variable that carries the name of the host we're connected to.
1121: # Returns:
1122: # 1 - Ok to continue processing.
1123: # 0 - Program should exit.
1124: # Side effects:
1125: # Reply information is sent to the client.
1126: sub load_handler {
1127: my ($cmd, $tail, $replyfd) = @_;
1128:
1129:
1130:
1131: # Get the load average from /proc/loadavg and calculate it as a percentage of
1132: # the allowed load limit as set by the perl global variable lonLoadLim
1133:
1134: my $loadavg;
1135: my $loadfile=IO::File->new('/proc/loadavg');
1136:
1137: $loadavg=<$loadfile>;
1138: $loadavg =~ s/\s.*//g; # Extract the first field only.
1139:
1140: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1141:
1142: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1143:
1144: return 1;
1145: }
1146: ®ister_handler("load", \&load_handler, 0, 1, 0);
1147:
1148: #
1149: # Process the userload request. This sub returns to the client the current
1150: # user load average. It can be invoked either by clients or managers.
1151: #
1152: # Parameters:
1153: # $cmd - the actual keyword that invoked us.
1154: # $tail - the tail of the request that invoked us.
1155: # $replyfd- File descriptor connected to the client
1156: # Implicit Inputs:
1157: # $currenthostid - Global variable that carries the name of the host
1158: # known as.
1159: # $clientname - Global variable that carries the name of the host we're connected to.
1160: # Returns:
1161: # 1 - Ok to continue processing.
1162: # 0 - Program should exit
1163: # Implicit inputs:
1164: # whatever the userload() function requires.
1165: # Implicit outputs:
1166: # the reply is written to the client.
1167: #
1168: sub user_load_handler {
1169: my ($cmd, $tail, $replyfd) = @_;
1170:
1171: my $userloadpercent=&Apache::lonnet::userload();
1172: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1173:
1174: return 1;
1175: }
1176: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1177:
1178: # Process a request for the authorization type of a user:
1179: # (userauth).
1180: #
1181: # Parameters:
1182: # $cmd - the actual keyword that invoked us.
1183: # $tail - the tail of the request that invoked us.
1184: # $replyfd- File descriptor connected to the client
1185: # Returns:
1186: # 1 - Ok to continue processing.
1187: # 0 - Program should exit
1188: # Implicit outputs:
1189: # The user authorization type is written to the client.
1190: #
1191: sub user_authorization_type {
1192: my ($cmd, $tail, $replyfd) = @_;
1193:
1194: my $userinput = "$cmd:$tail";
1195:
1196: # Pull the domain and username out of the command tail.
1197: # and call get_auth_type to determine the authentication type.
1198:
1199: my ($udom,$uname)=split(/:/,$tail);
1200: my $result = &get_auth_type($udom, $uname);
1201: if($result eq "nouser") {
1202: &Failure( $replyfd, "unknown_user\n", $userinput);
1203: } else {
1204: #
1205: # We only want to pass the second field from get_auth_type
1206: # for ^krb.. otherwise we'll be handing out the encrypted
1207: # password for internals e.g.
1208: #
1209: my ($type,$otherinfo) = split(/:/,$result);
1210: if($type =~ /^krb/) {
1211: $type = $result;
1212: } else {
1213: $type .= ':';
1214: }
1215: &Reply( $replyfd, \$type, $userinput);
1216: }
1217:
1218: return 1;
1219: }
1220: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1221:
1222: # Process a request by a manager to push a hosts or domain table
1223: # to us. We pick apart the command and pass it on to the subs
1224: # that already exist to do this.
1225: #
1226: # Parameters:
1227: # $cmd - the actual keyword that invoked us.
1228: # $tail - the tail of the request that invoked us.
1229: # $client - File descriptor connected to the client
1230: # Returns:
1231: # 1 - Ok to continue processing.
1232: # 0 - Program should exit
1233: # Implicit Output:
1234: # a reply is written to the client.
1235: sub push_file_handler {
1236: my ($cmd, $tail, $client) = @_;
1237: &Debug("In push file handler");
1238: my $userinput = "$cmd:$tail";
1239:
1240: # At this time we only know that the IP of our partner is a valid manager
1241: # the code below is a hook to do further authentication (e.g. to resolve
1242: # spoofing).
1243:
1244: my $cert = &GetCertificate($userinput);
1245: if(&ValidManager($cert)) {
1246: &Debug("Valid manager: $client");
1247:
1248: # Now presumably we have the bona fides of both the peer host and the
1249: # process making the request.
1250:
1251: my $reply = &PushFile($userinput);
1252: &Reply($client, \$reply, $userinput);
1253:
1254: } else {
1255: &logthis("push_file_handler $client is not valid");
1256: &Failure( $client, "refused\n", $userinput);
1257: }
1258: return 1;
1259: }
1260: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1261:
1262: # The du_handler routine should be considered obsolete and is retained
1263: # for communication with legacy servers. Please see the du2_handler.
1264: #
1265: # du - list the disk usage of a directory recursively.
1266: #
1267: # note: stolen code from the ls file handler
1268: # under construction by Rick Banghart
1269: # .
1270: # Parameters:
1271: # $cmd - The command that dispatched us (du).
1272: # $ududir - The directory path to list... I'm not sure what this
1273: # is relative as things like ls:. return e.g.
1274: # no_such_dir.
1275: # $client - Socket open on the client.
1276: # Returns:
1277: # 1 - indicating that the daemon should not disconnect.
1278: # Side Effects:
1279: # The reply is written to $client.
1280: #
1281: sub du_handler {
1282: my ($cmd, $ududir, $client) = @_;
1283: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1284: my $userinput = "$cmd:$ududir";
1285:
1286: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1287: &Failure($client,"refused\n","$cmd:$ududir");
1288: return 1;
1289: }
1290: # Since $ududir could have some nasties in it,
1291: # we will require that ududir is a valid
1292: # directory. Just in case someone tries to
1293: # slip us a line like .;(cd /home/httpd rm -rf*)
1294: # etc.
1295: #
1296: if (-d $ududir) {
1297: my $total_size=0;
1298: my $code=sub {
1299: if ($_=~/\.\d+\./) { return;}
1300: if ($_=~/\.meta$/) { return;}
1301: if (-d $_) { return;}
1302: $total_size+=(stat($_))[7];
1303: };
1304: chdir($ududir);
1305: find($code,$ududir);
1306: $total_size=int($total_size/1024);
1307: &Reply($client,\$total_size,"$cmd:$ududir");
1308: } else {
1309: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1310: }
1311: return 1;
1312: }
1313: ®ister_handler("du", \&du_handler, 0, 1, 0);
1314:
1315: # Please also see the du_handler, which is obsoleted by du2.
1316: # du2_handler differs from du_handler in that required path to directory
1317: # provided by &propath() is prepended in the handler instead of on the
1318: # client side.
1319: #
1320: # du2 - list the disk usage of a directory recursively.
1321: #
1322: # Parameters:
1323: # $cmd - The command that dispatched us (du).
1324: # $tail - The tail of the request that invoked us.
1325: # $tail is a : separated list of the following:
1326: # - $ududir - directory path to list (before prepending)
1327: # - $getpropath = 1 if &propath() should prepend
1328: # - $uname - username to use for &propath or user dir
1329: # - $udom - domain to use for &propath or user dir
1330: # All are escaped.
1331: # $client - Socket open on the client.
1332: # Returns:
1333: # 1 - indicating that the daemon should not disconnect.
1334: # Side Effects:
1335: # The reply is written to $client.
1336: #
1337:
1338: sub du2_handler {
1339: my ($cmd, $tail, $client) = @_;
1340: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1341: my $userinput = "$cmd:$tail";
1342: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1343: &Failure($client,"refused\n","$cmd:$tail");
1344: return 1;
1345: }
1346: if ($getpropath) {
1347: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1348: $ududir = &propath($udom,$uname).'/'.$ududir;
1349: } else {
1350: &Failure($client,"refused\n","$cmd:$tail");
1351: return 1;
1352: }
1353: }
1354: # Since $ududir could have some nasties in it,
1355: # we will require that ududir is a valid
1356: # directory. Just in case someone tries to
1357: # slip us a line like .;(cd /home/httpd rm -rf*)
1358: # etc.
1359: #
1360: if (-d $ududir) {
1361: my $total_size=0;
1362: my $code=sub {
1363: if ($_=~/\.\d+\./) { return;}
1364: if ($_=~/\.meta$/) { return;}
1365: if (-d $_) { return;}
1366: $total_size+=(stat($_))[7];
1367: };
1368: chdir($ududir);
1369: find($code,$ududir);
1370: $total_size=int($total_size/1024);
1371: &Reply($client,\$total_size,"$cmd:$ududir");
1372: } else {
1373: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1374: }
1375: return 1;
1376: }
1377: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1378:
1379: #
1380: # The ls_handler routine should be considered obsolete and is retained
1381: # for communication with legacy servers. Please see the ls3_handler.
1382: #
1383: # ls - list the contents of a directory. For each file in the
1384: # selected directory the filename followed by the full output of
1385: # the stat function is returned. The returned info for each
1386: # file are separated by ':'. The stat fields are separated by &'s.
1387: # Parameters:
1388: # $cmd - The command that dispatched us (ls).
1389: # $ulsdir - The directory path to list... I'm not sure what this
1390: # is relative as things like ls:. return e.g.
1391: # no_such_dir.
1392: # $client - Socket open on the client.
1393: # Returns:
1394: # 1 - indicating that the daemon should not disconnect.
1395: # Side Effects:
1396: # The reply is written to $client.
1397: #
1398: sub ls_handler {
1399: # obsoleted by ls2_handler
1400: my ($cmd, $ulsdir, $client) = @_;
1401:
1402: my $userinput = "$cmd:$ulsdir";
1403:
1404: my $obs;
1405: my $rights;
1406: my $ulsout='';
1407: my $ulsfn;
1408: if (-e $ulsdir) {
1409: if(-d $ulsdir) {
1410: if (opendir(LSDIR,$ulsdir)) {
1411: while ($ulsfn=readdir(LSDIR)) {
1412: undef($obs);
1413: undef($rights);
1414: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1415: #We do some obsolete checking here
1416: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1417: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1418: my @obsolete=<FILE>;
1419: foreach my $obsolete (@obsolete) {
1420: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1421: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1422: }
1423: }
1424: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1425: if($obs eq '1') { $ulsout.="&1"; }
1426: else { $ulsout.="&0"; }
1427: if($rights eq '1') { $ulsout.="&1:"; }
1428: else { $ulsout.="&0:"; }
1429: }
1430: closedir(LSDIR);
1431: }
1432: } else {
1433: my @ulsstats=stat($ulsdir);
1434: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1435: }
1436: } else {
1437: $ulsout='no_such_dir';
1438: }
1439: if ($ulsout eq '') { $ulsout='empty'; }
1440: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1441:
1442: return 1;
1443:
1444: }
1445: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1446:
1447: # The ls2_handler routine should be considered obsolete and is retained
1448: # for communication with legacy servers. Please see the ls3_handler.
1449: # Please also see the ls_handler, which was itself obsoleted by ls2.
1450: # ls2_handler differs from ls_handler in that it escapes its return
1451: # values before concatenating them together with ':'s.
1452: #
1453: # ls2 - list the contents of a directory. For each file in the
1454: # selected directory the filename followed by the full output of
1455: # the stat function is returned. The returned info for each
1456: # file are separated by ':'. The stat fields are separated by &'s.
1457: # Parameters:
1458: # $cmd - The command that dispatched us (ls).
1459: # $ulsdir - The directory path to list... I'm not sure what this
1460: # is relative as things like ls:. return e.g.
1461: # no_such_dir.
1462: # $client - Socket open on the client.
1463: # Returns:
1464: # 1 - indicating that the daemon should not disconnect.
1465: # Side Effects:
1466: # The reply is written to $client.
1467: #
1468: sub ls2_handler {
1469: my ($cmd, $ulsdir, $client) = @_;
1470:
1471: my $userinput = "$cmd:$ulsdir";
1472:
1473: my $obs;
1474: my $rights;
1475: my $ulsout='';
1476: my $ulsfn;
1477: if (-e $ulsdir) {
1478: if(-d $ulsdir) {
1479: if (opendir(LSDIR,$ulsdir)) {
1480: while ($ulsfn=readdir(LSDIR)) {
1481: undef($obs);
1482: undef($rights);
1483: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1484: #We do some obsolete checking here
1485: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1486: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1487: my @obsolete=<FILE>;
1488: foreach my $obsolete (@obsolete) {
1489: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1490: if($obsolete =~ m|(<copyright>)(default)|) {
1491: $rights = 1;
1492: }
1493: }
1494: }
1495: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1496: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1497: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1498: $ulsout.= &escape($tmp).':';
1499: }
1500: closedir(LSDIR);
1501: }
1502: } else {
1503: my @ulsstats=stat($ulsdir);
1504: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1505: }
1506: } else {
1507: $ulsout='no_such_dir';
1508: }
1509: if ($ulsout eq '') { $ulsout='empty'; }
1510: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1511: return 1;
1512: }
1513: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1514: #
1515: # ls3 - list the contents of a directory. For each file in the
1516: # selected directory the filename followed by the full output of
1517: # the stat function is returned. The returned info for each
1518: # file are separated by ':'. The stat fields are separated by &'s.
1519: # Parameters:
1520: # $cmd - The command that dispatched us (ls).
1521: # $tail - The tail of the request that invoked us.
1522: # $tail is a : separated list of the following:
1523: # - $ulsdir - directory path to list (before prepending)
1524: # - $getpropath = 1 if &propath() should prepend
1525: # - $getuserdir = 1 if path to user dir in lonUsers should
1526: # prepend
1527: # - $alternate_root - path to prepend
1528: # - $uname - username to use for &propath or user dir
1529: # - $udom - domain to use for &propath or user dir
1530: # All of these except $getpropath and &getuserdir are escaped.
1531: # no_such_dir.
1532: # $client - Socket open on the client.
1533: # Returns:
1534: # 1 - indicating that the daemon should not disconnect.
1535: # Side Effects:
1536: # The reply is written to $client.
1537: #
1538:
1539: sub ls3_handler {
1540: my ($cmd, $tail, $client) = @_;
1541: my $userinput = "$cmd:$tail";
1542: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1543: split(/:/,$tail);
1544: if (defined($ulsdir)) {
1545: $ulsdir = &unescape($ulsdir);
1546: }
1547: if (defined($alternate_root)) {
1548: $alternate_root = &unescape($alternate_root);
1549: }
1550: if (defined($uname)) {
1551: $uname = &unescape($uname);
1552: }
1553: if (defined($udom)) {
1554: $udom = &unescape($udom);
1555: }
1556:
1557: my $dir_root = $perlvar{'lonDocRoot'};
1558: if ($getpropath) {
1559: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1560: $dir_root = &propath($udom,$uname);
1561: $dir_root =~ s/\/$//;
1562: } else {
1563: &Failure($client,"refused\n","$cmd:$tail");
1564: return 1;
1565: }
1566: } elsif ($getuserdir) {
1567: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1568: my $subdir=$uname.'__';
1569: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1570: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1571: ."/$udom/$subdir/$uname";
1572: } else {
1573: &Failure($client,"refused\n","$cmd:$tail");
1574: return 1;
1575: }
1576: } elsif ($alternate_root ne '') {
1577: $dir_root = $alternate_root;
1578: }
1579: if (($dir_root ne '') && ($dir_root ne '/')) {
1580: if ($ulsdir =~ /^\//) {
1581: $ulsdir = $dir_root.$ulsdir;
1582: } else {
1583: $ulsdir = $dir_root.'/'.$ulsdir;
1584: }
1585: }
1586: my $obs;
1587: my $rights;
1588: my $ulsout='';
1589: my $ulsfn;
1590: if (-e $ulsdir) {
1591: if(-d $ulsdir) {
1592: if (opendir(LSDIR,$ulsdir)) {
1593: while ($ulsfn=readdir(LSDIR)) {
1594: undef($obs);
1595: undef($rights);
1596: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1597: #We do some obsolete checking here
1598: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1599: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1600: my @obsolete=<FILE>;
1601: foreach my $obsolete (@obsolete) {
1602: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1603: if($obsolete =~ m|(<copyright>)(default)|) {
1604: $rights = 1;
1605: }
1606: }
1607: }
1608: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1609: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1610: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1611: $ulsout.= &escape($tmp).':';
1612: }
1613: closedir(LSDIR);
1614: }
1615: } else {
1616: my @ulsstats=stat($ulsdir);
1617: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1618: }
1619: } else {
1620: $ulsout='no_such_dir';
1621: }
1622: if ($ulsout eq '') { $ulsout='empty'; }
1623: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1624: return 1;
1625: }
1626: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1627:
1628: sub read_lonnet_global {
1629: my ($cmd,$tail,$client) = @_;
1630: my $userinput = "$cmd:$tail";
1631: my $requested = &Apache::lonnet::thaw_unescape($tail);
1632: my $result;
1633: my %packagevars = (
1634: spareid => \%Apache::lonnet::spareid,
1635: perlvar => \%Apache::lonnet::perlvar,
1636: );
1637: my %limit_to = (
1638: perlvar => {
1639: lonOtherAuthen => 1,
1640: lonBalancer => 1,
1641: lonVersion => 1,
1642: lonSysEMail => 1,
1643: lonHostID => 1,
1644: lonRole => 1,
1645: lonDefDomain => 1,
1646: lonLoadLim => 1,
1647: lonUserLoadLim => 1,
1648: }
1649: );
1650: if (ref($requested) eq 'HASH') {
1651: foreach my $what (keys(%{$requested})) {
1652: my $response;
1653: my $items = {};
1654: if (exists($packagevars{$what})) {
1655: if (ref($limit_to{$what}) eq 'HASH') {
1656: foreach my $varname (keys(%{$packagevars{$what}})) {
1657: if ($limit_to{$what}{$varname}) {
1658: $items->{$varname} = $packagevars{$what}{$varname};
1659: }
1660: }
1661: } else {
1662: $items = $packagevars{$what};
1663: }
1664: if ($what eq 'perlvar') {
1665: if (!exists($packagevars{$what}{'lonBalancer'})) {
1666: if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
1667: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
1668: if (ref($othervarref) eq 'HASH') {
1669: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
1670: }
1671: }
1672: }
1673: }
1674: $response = &Apache::lonnet::freeze_escape($items);
1675: }
1676: $result .= &escape($what).'='.$response.'&';
1677: }
1678: }
1679: $result =~ s/\&$//;
1680: &Reply($client,\$result,$userinput);
1681: return 1;
1682: }
1683: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
1684:
1685: sub server_devalidatecache_handler {
1686: my ($cmd,$tail,$client) = @_;
1687: my $userinput = "$cmd:$tail";
1688: my ($name,$id) = map { &unescape($_); } split(/:/,$tail);
1689: &Apache::lonnet::devalidate_cache_new($name,$id);
1690: my $result = 'ok';
1691: &Reply($client,\$result,$userinput);
1692: return 1;
1693: }
1694: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1695:
1696: sub server_timezone_handler {
1697: my ($cmd,$tail,$client) = @_;
1698: my $userinput = "$cmd:$tail";
1699: my $timezone;
1700: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1701: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1702: if (-e $clockfile) {
1703: if (open(my $fh,"<$clockfile")) {
1704: while (<$fh>) {
1705: next if (/^[\#\s]/);
1706: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1707: $timezone = $1;
1708: last;
1709: }
1710: }
1711: close($fh);
1712: }
1713: } elsif (-e $tzfile) {
1714: if (open(my $fh,"<$tzfile")) {
1715: $timezone = <$fh>;
1716: close($fh);
1717: chomp($timezone);
1718: if ($timezone =~ m{^Etc/(\w+)$}) {
1719: $timezone = $1;
1720: }
1721: }
1722: }
1723: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1724: return 1;
1725: }
1726: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1727:
1728: sub server_loncaparev_handler {
1729: my ($cmd,$tail,$client) = @_;
1730: my $userinput = "$cmd:$tail";
1731: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1732: return 1;
1733: }
1734: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1735:
1736: sub server_homeID_handler {
1737: my ($cmd,$tail,$client) = @_;
1738: my $userinput = "$cmd:$tail";
1739: &Reply($client,\$perlvar{'lonHostID'},$userinput);
1740: return 1;
1741: }
1742: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
1743:
1744: sub server_distarch_handler {
1745: my ($cmd,$tail,$client) = @_;
1746: my $userinput = "$cmd:$tail";
1747: my $reply = &distro_and_arch();
1748: &Reply($client,\$reply,$userinput);
1749: return 1;
1750: }
1751: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
1752:
1753: # Process a reinit request. Reinit requests that either
1754: # lonc or lond be reinitialized so that an updated
1755: # host.tab or domain.tab can be processed.
1756: #
1757: # Parameters:
1758: # $cmd - the actual keyword that invoked us.
1759: # $tail - the tail of the request that invoked us.
1760: # $client - File descriptor connected to the client
1761: # Returns:
1762: # 1 - Ok to continue processing.
1763: # 0 - Program should exit
1764: # Implicit output:
1765: # a reply is sent to the client.
1766: #
1767: sub reinit_process_handler {
1768: my ($cmd, $tail, $client) = @_;
1769:
1770: my $userinput = "$cmd:$tail";
1771:
1772: my $cert = &GetCertificate($userinput);
1773: if(&ValidManager($cert)) {
1774: chomp($userinput);
1775: my $reply = &ReinitProcess($userinput);
1776: &Reply( $client, \$reply, $userinput);
1777: } else {
1778: &Failure( $client, "refused\n", $userinput);
1779: }
1780: return 1;
1781: }
1782: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1783:
1784: # Process the editing script for a table edit operation.
1785: # the editing operation must be encrypted and requested by
1786: # a manager host.
1787: #
1788: # Parameters:
1789: # $cmd - the actual keyword that invoked us.
1790: # $tail - the tail of the request that invoked us.
1791: # $client - File descriptor connected to the client
1792: # Returns:
1793: # 1 - Ok to continue processing.
1794: # 0 - Program should exit
1795: # Implicit output:
1796: # a reply is sent to the client.
1797: #
1798: sub edit_table_handler {
1799: my ($command, $tail, $client) = @_;
1800:
1801: my $userinput = "$command:$tail";
1802:
1803: my $cert = &GetCertificate($userinput);
1804: if(&ValidManager($cert)) {
1805: my($filetype, $script) = split(/:/, $tail);
1806: if (($filetype eq "hosts") ||
1807: ($filetype eq "domain")) {
1808: if($script ne "") {
1809: &Reply($client, # BUGBUG - EditFile
1810: &EditFile($userinput), # could fail.
1811: $userinput);
1812: } else {
1813: &Failure($client,"refused\n",$userinput);
1814: }
1815: } else {
1816: &Failure($client,"refused\n",$userinput);
1817: }
1818: } else {
1819: &Failure($client,"refused\n",$userinput);
1820: }
1821: return 1;
1822: }
1823: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1824:
1825: #
1826: # Authenticate a user against the LonCAPA authentication
1827: # database. Note that there are several authentication
1828: # possibilities:
1829: # - unix - The user can be authenticated against the unix
1830: # password file.
1831: # - internal - The user can be authenticated against a purely
1832: # internal per user password file.
1833: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1834: # ticket granting authority.
1835: # - user - The person tailoring LonCAPA can supply a user authentication
1836: # mechanism that is per system.
1837: #
1838: # Parameters:
1839: # $cmd - The command that got us here.
1840: # $tail - Tail of the command (remaining parameters).
1841: # $client - File descriptor connected to client.
1842: # Returns
1843: # 0 - Requested to exit, caller should shut down.
1844: # 1 - Continue processing.
1845: # Implicit inputs:
1846: # The authentication systems describe above have their own forms of implicit
1847: # input into the authentication process that are described above.
1848: #
1849: sub authenticate_handler {
1850: my ($cmd, $tail, $client) = @_;
1851:
1852:
1853: # Regenerate the full input line
1854:
1855: my $userinput = $cmd.":".$tail;
1856:
1857: # udom - User's domain.
1858: # uname - Username.
1859: # upass - User's password.
1860: # checkdefauth - Pass to validate_user() to try authentication
1861: # with default auth type(s) if no user account.
1862: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
1863: # to check if session can be hosted.
1864:
1865: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
1866: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
1867: chomp($upass);
1868: $upass=&unescape($upass);
1869:
1870: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1871: if($pwdcorrect) {
1872: my $canhost = 1;
1873: unless ($clientcancheckhost) {
1874: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
1875: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1876: my @intdoms;
1877: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
1878: if (ref($internet_names) eq 'ARRAY') {
1879: @intdoms = @{$internet_names};
1880: }
1881: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1882: my ($remote,$hosted);
1883: my $remotesession = &get_usersession_config($udom,'remotesession');
1884: if (ref($remotesession) eq 'HASH') {
1885: $remote = $remotesession->{'remote'}
1886: }
1887: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
1888: if (ref($hostedsession) eq 'HASH') {
1889: $hosted = $hostedsession->{'hosted'};
1890: }
1891: my $loncaparev = $clientversion;
1892: if ($loncaparev eq '') {
1893: $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
1894: }
1895: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
1896: $loncaparev,
1897: $remote,$hosted);
1898: }
1899: }
1900: if ($canhost) {
1901: &Reply( $client, "authorized\n", $userinput);
1902: } else {
1903: &Reply( $client, "not_allowed_to_host\n", $userinput);
1904: }
1905: #
1906: # Bad credentials: Failed to authorize
1907: #
1908: } else {
1909: &Failure( $client, "non_authorized\n", $userinput);
1910: }
1911:
1912: return 1;
1913: }
1914: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1915:
1916: #
1917: # Change a user's password. Note that this function is complicated by
1918: # the fact that a user may be authenticated in more than one way:
1919: # At present, we are not able to change the password for all types of
1920: # authentication methods. Only for:
1921: # unix - unix password or shadow passoword style authentication.
1922: # local - Locally written authentication mechanism.
1923: # For now, kerb4 and kerb5 password changes are not supported and result
1924: # in an error.
1925: # FUTURE WORK:
1926: # Support kerberos passwd changes?
1927: # Parameters:
1928: # $cmd - The command that got us here.
1929: # $tail - Tail of the command (remaining parameters).
1930: # $client - File descriptor connected to client.
1931: # Returns
1932: # 0 - Requested to exit, caller should shut down.
1933: # 1 - Continue processing.
1934: # Implicit inputs:
1935: # The authentication systems describe above have their own forms of implicit
1936: # input into the authentication process that are described above.
1937: sub change_password_handler {
1938: my ($cmd, $tail, $client) = @_;
1939:
1940: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1941:
1942: #
1943: # udom - user's domain.
1944: # uname - Username.
1945: # upass - Current password.
1946: # npass - New password.
1947: # context - Context in which this was called
1948: # (preferences or reset_by_email).
1949: # lonhost - HostID of server where request originated
1950:
1951: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1952:
1953: $upass=&unescape($upass);
1954: $npass=&unescape($npass);
1955: &Debug("Trying to change password for $uname");
1956:
1957: # First require that the user can be authenticated with their
1958: # old password unless context was 'reset_by_email':
1959:
1960: my ($validated,$failure);
1961: if ($context eq 'reset_by_email') {
1962: if ($lonhost eq '') {
1963: $failure = 'invalid_client';
1964: } else {
1965: $validated = 1;
1966: }
1967: } else {
1968: $validated = &validate_user($udom, $uname, $upass);
1969: }
1970: if($validated) {
1971: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1972:
1973: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1974: if ($howpwd eq 'internal') {
1975: &Debug("internal auth");
1976: my $salt=time;
1977: $salt=substr($salt,6,2);
1978: my $ncpass=crypt($npass,$salt);
1979: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1980: my $msg="Result of password change for $uname: pwchange_success";
1981: if ($lonhost) {
1982: $msg .= " - request originated from: $lonhost";
1983: }
1984: &logthis($msg);
1985: &Reply($client, "ok\n", $userinput);
1986: } else {
1987: &logthis("Unable to open $uname passwd "
1988: ."to change password");
1989: &Failure( $client, "non_authorized\n",$userinput);
1990: }
1991: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1992: my $result = &change_unix_password($uname, $npass);
1993: &logthis("Result of password change for $uname: ".
1994: $result);
1995: &Reply($client, \$result, $userinput);
1996: } else {
1997: # this just means that the current password mode is not
1998: # one we know how to change (e.g the kerberos auth modes or
1999: # locally written auth handler).
2000: #
2001: &Failure( $client, "auth_mode_error\n", $userinput);
2002: }
2003:
2004: } else {
2005: if ($failure eq '') {
2006: $failure = 'non_authorized';
2007: }
2008: &Failure( $client, "$failure\n", $userinput);
2009: }
2010:
2011: return 1;
2012: }
2013: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2014:
2015: #
2016: # Create a new user. User in this case means a lon-capa user.
2017: # The user must either already exist in some authentication realm
2018: # like kerberos or the /etc/passwd. If not, a user completely local to
2019: # this loncapa system is created.
2020: #
2021: # Parameters:
2022: # $cmd - The command that got us here.
2023: # $tail - Tail of the command (remaining parameters).
2024: # $client - File descriptor connected to client.
2025: # Returns
2026: # 0 - Requested to exit, caller should shut down.
2027: # 1 - Continue processing.
2028: # Implicit inputs:
2029: # The authentication systems describe above have their own forms of implicit
2030: # input into the authentication process that are described above.
2031: sub add_user_handler {
2032:
2033: my ($cmd, $tail, $client) = @_;
2034:
2035:
2036: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2037: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2038:
2039: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2040:
2041:
2042: if($udom eq $currentdomainid) { # Reject new users for other domains...
2043:
2044: my $oldumask=umask(0077);
2045: chomp($npass);
2046: $npass=&unescape($npass);
2047: my $passfilename = &password_path($udom, $uname);
2048: &Debug("Password file created will be:".$passfilename);
2049: if (-e $passfilename) {
2050: &Failure( $client, "already_exists\n", $userinput);
2051: } else {
2052: my $fperror='';
2053: if (!&mkpath($passfilename)) {
2054: $fperror="error: ".($!+0)." mkdir failed while attempting "
2055: ."makeuser";
2056: }
2057: unless ($fperror) {
2058: my $result=&make_passwd_file($uname,$udom,$umode,$npass, $passfilename);
2059: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2060: } else {
2061: &Failure($client, \$fperror, $userinput);
2062: }
2063: }
2064: umask($oldumask);
2065: } else {
2066: &Failure($client, "not_right_domain\n",
2067: $userinput); # Even if we are multihomed.
2068:
2069: }
2070: return 1;
2071:
2072: }
2073: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2074:
2075: #
2076: # Change the authentication method of a user. Note that this may
2077: # also implicitly change the user's password if, for example, the user is
2078: # joining an existing authentication realm. Known authentication realms at
2079: # this time are:
2080: # internal - Purely internal password file (only loncapa knows this user)
2081: # local - Institutionally written authentication module.
2082: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2083: # kerb4 - kerberos version 4
2084: # kerb5 - kerberos version 5
2085: #
2086: # Parameters:
2087: # $cmd - The command that got us here.
2088: # $tail - Tail of the command (remaining parameters).
2089: # $client - File descriptor connected to client.
2090: # Returns
2091: # 0 - Requested to exit, caller should shut down.
2092: # 1 - Continue processing.
2093: # Implicit inputs:
2094: # The authentication systems describe above have their own forms of implicit
2095: # input into the authentication process that are described above.
2096: # NOTE:
2097: # This is also used to change the authentication credential values (e.g. passwd).
2098: #
2099: #
2100: sub change_authentication_handler {
2101:
2102: my ($cmd, $tail, $client) = @_;
2103:
2104: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2105:
2106: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2107: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2108: if ($udom ne $currentdomainid) {
2109: &Failure( $client, "not_right_domain\n", $client);
2110: } else {
2111:
2112: chomp($npass);
2113:
2114: $npass=&unescape($npass);
2115: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2116: my $passfilename = &password_path($udom, $uname);
2117: if ($passfilename) { # Not allowed to create a new user!!
2118: # If just changing the unix passwd. need to arrange to run
2119: # passwd since otherwise make_passwd_file will fail as
2120: # creation of unix authenticated users is no longer supported
2121: # except from the command line, when running make_domain_coordinator.pl
2122:
2123: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2124: my $result = &change_unix_password($uname, $npass);
2125: &logthis("Result of password change for $uname: ".$result);
2126: if ($result eq "ok") {
2127: &Reply($client, \$result);
2128: } else {
2129: &Failure($client, \$result);
2130: }
2131: } else {
2132: my $result=&make_passwd_file($uname,$udom,$umode,$npass,$passfilename);
2133: #
2134: # If the current auth mode is internal, and the old auth mode was
2135: # unix, or krb*, and the user is an author for this domain,
2136: # re-run manage_permissions for that role in order to be able
2137: # to take ownership of the construction space back to www:www
2138: #
2139:
2140:
2141: &Reply($client, \$result, $userinput);
2142: }
2143:
2144:
2145: } else {
2146: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2147: }
2148: }
2149: return 1;
2150: }
2151: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2152:
2153: #
2154: # Determines if this is the home server for a user. The home server
2155: # for a user will have his/her lon-capa passwd file. Therefore all we need
2156: # to do is determine if this file exists.
2157: #
2158: # Parameters:
2159: # $cmd - The command that got us here.
2160: # $tail - Tail of the command (remaining parameters).
2161: # $client - File descriptor connected to client.
2162: # Returns
2163: # 0 - Requested to exit, caller should shut down.
2164: # 1 - Continue processing.
2165: # Implicit inputs:
2166: # The authentication systems describe above have their own forms of implicit
2167: # input into the authentication process that are described above.
2168: #
2169: sub is_home_handler {
2170: my ($cmd, $tail, $client) = @_;
2171:
2172: my $userinput = "$cmd:$tail";
2173:
2174: my ($udom,$uname)=split(/:/,$tail);
2175: chomp($uname);
2176: my $passfile = &password_filename($udom, $uname);
2177: if($passfile) {
2178: &Reply( $client, "found\n", $userinput);
2179: } else {
2180: &Failure($client, "not_found\n", $userinput);
2181: }
2182: return 1;
2183: }
2184: ®ister_handler("home", \&is_home_handler, 0,1,0);
2185:
2186: #
2187: # Process an update request for a resource.
2188: # A resource has been modified that we hold a subscription to.
2189: # If the resource is not local, then we must update, or at least invalidate our
2190: # cached copy of the resource.
2191: # Parameters:
2192: # $cmd - The command that got us here.
2193: # $tail - Tail of the command (remaining parameters).
2194: # $client - File descriptor connected to client.
2195: # Returns
2196: # 0 - Requested to exit, caller should shut down.
2197: # 1 - Continue processing.
2198: # Implicit inputs:
2199: # The authentication systems describe above have their own forms of implicit
2200: # input into the authentication process that are described above.
2201: #
2202: sub update_resource_handler {
2203:
2204: my ($cmd, $tail, $client) = @_;
2205:
2206: my $userinput = "$cmd:$tail";
2207:
2208: my $fname= $tail; # This allows interactive testing
2209:
2210:
2211: my $ownership=ishome($fname);
2212: if ($ownership eq 'not_owner') {
2213: if (-e $fname) {
2214: # Delete preview file, if exists
2215: unlink("$fname.tmp");
2216: # Get usage stats
2217: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2218: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2219: my $now=time;
2220: my $since=$now-$atime;
2221: # If the file has not been used within lonExpire seconds,
2222: # unsubscribe from it and delete local copy
2223: if ($since>$perlvar{'lonExpire'}) {
2224: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2225: &devalidate_meta_cache($fname);
2226: unlink("$fname");
2227: unlink("$fname.meta");
2228: } else {
2229: # Yes, this is in active use. Get a fresh copy. Since it might be in
2230: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2231: my $transname="$fname.in.transfer";
2232: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2233: my $response;
2234: # FIXME: cannot replicate files that take more than two minutes to transfer?
2235: # alarm(120);
2236: # FIXME: this should use the LWP mechanism, not internal alarms.
2237: alarm(1200);
2238: {
2239: my $ua=new LWP::UserAgent;
2240: my $request=new HTTP::Request('GET',"$remoteurl");
2241: $response=$ua->request($request,$transname);
2242: }
2243: alarm(0);
2244: if ($response->is_error()) {
2245: # FIXME: we should probably clean up here instead of just whine
2246: unlink($transname);
2247: my $message=$response->status_line;
2248: &logthis("LWP GET: $message for $fname ($remoteurl)");
2249: } else {
2250: if ($remoteurl!~/\.meta$/) {
2251: # FIXME: isn't there an internal LWP mechanism for this?
2252: alarm(120);
2253: {
2254: my $ua=new LWP::UserAgent;
2255: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2256: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2257: if ($mresponse->is_error()) {
2258: unlink($fname.'.meta');
2259: }
2260: }
2261: alarm(0);
2262: }
2263: # we successfully transfered, copy file over to real name
2264: rename($transname,$fname);
2265: &devalidate_meta_cache($fname);
2266: }
2267: }
2268: &Reply( $client, "ok\n", $userinput);
2269: } else {
2270: &Failure($client, "not_found\n", $userinput);
2271: }
2272: } else {
2273: &Failure($client, "rejected\n", $userinput);
2274: }
2275: return 1;
2276: }
2277: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2278:
2279: sub devalidate_meta_cache {
2280: my ($url) = @_;
2281: use Cache::Memcached;
2282: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2283: $url = &Apache::lonnet::declutter($url);
2284: $url =~ s-\.meta$--;
2285: my $id = &escape('meta:'.$url);
2286: $memcache->delete($id);
2287: }
2288:
2289: #
2290: # Fetch a user file from a remote server to the user's home directory
2291: # userfiles subdir.
2292: # Parameters:
2293: # $cmd - The command that got us here.
2294: # $tail - Tail of the command (remaining parameters).
2295: # $client - File descriptor connected to client.
2296: # Returns
2297: # 0 - Requested to exit, caller should shut down.
2298: # 1 - Continue processing.
2299: #
2300: sub fetch_user_file_handler {
2301:
2302: my ($cmd, $tail, $client) = @_;
2303:
2304: my $userinput = "$cmd:$tail";
2305: my $fname = $tail;
2306: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2307: my $udir=&propath($udom,$uname).'/userfiles';
2308: unless (-e $udir) {
2309: mkdir($udir,0770);
2310: }
2311: Debug("fetch user file for $fname");
2312: if (-e $udir) {
2313: $ufile=~s/^[\.\~]+//;
2314:
2315: # IF necessary, create the path right down to the file.
2316: # Note that any regular files in the way of this path are
2317: # wiped out to deal with some earlier folly of mine.
2318:
2319: if (!&mkpath($udir.'/'.$ufile)) {
2320: &Failure($client, "unable_to_create\n", $userinput);
2321: }
2322:
2323: my $destname=$udir.'/'.$ufile;
2324: my $transname=$udir.'/'.$ufile.'.in.transit';
2325: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2326: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2327: my $clienthost = &Apache::lonnet::hostname($clientname);
2328: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2329: my $response;
2330: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2331: alarm(120);
2332: {
2333: my $ua=new LWP::UserAgent;
2334: my $request=new HTTP::Request('GET',"$remoteurl");
2335: $response=$ua->request($request,$transname);
2336: }
2337: alarm(0);
2338: if ($response->is_error()) {
2339: unlink($transname);
2340: my $message=$response->status_line;
2341: &logthis("LWP GET: $message for $fname ($remoteurl)");
2342: &Failure($client, "failed\n", $userinput);
2343: } else {
2344: Debug("Renaming $transname to $destname");
2345: if (!rename($transname,$destname)) {
2346: &logthis("Unable to move $transname to $destname");
2347: unlink($transname);
2348: &Failure($client, "failed\n", $userinput);
2349: } else {
2350: if ($fname =~ /^default.+\.(page|sequence)$/) {
2351: my ($major,$minor) = split(/\./,$clientversion);
2352: if (($major < 2) || ($major == 2 && $minor < 11)) {
2353: my $now = time;
2354: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2355: my $key = &escape('internal.contentchange');
2356: my $what = "$key=$now";
2357: my $hashref = &tie_user_hash($udom,$uname,'environment',
2358: &GDBM_WRCREAT(),"P",$what);
2359: if ($hashref) {
2360: $hashref->{$key}=$now;
2361: if (!&untie_user_hash($hashref)) {
2362: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2363: "when updating internal.contentchange");
2364: }
2365: }
2366: }
2367: }
2368: &Reply($client, "ok\n", $userinput);
2369: }
2370: }
2371: } else {
2372: &Failure($client, "not_home\n", $userinput);
2373: }
2374: return 1;
2375: }
2376: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2377:
2378: #
2379: # Remove a file from a user's home directory userfiles subdirectory.
2380: # Parameters:
2381: # cmd - the Lond request keyword that got us here.
2382: # tail - the part of the command past the keyword.
2383: # client- File descriptor connected with the client.
2384: #
2385: # Returns:
2386: # 1 - Continue processing.
2387: sub remove_user_file_handler {
2388: my ($cmd, $tail, $client) = @_;
2389:
2390: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2391:
2392: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2393: if ($ufile =~m|/\.\./|) {
2394: # any files paths with /../ in them refuse
2395: # to deal with
2396: &Failure($client, "refused\n", "$cmd:$tail");
2397: } else {
2398: my $udir = &propath($udom,$uname);
2399: if (-e $udir) {
2400: my $file=$udir.'/userfiles/'.$ufile;
2401: if (-e $file) {
2402: #
2403: # If the file is a regular file unlink is fine...
2404: # However it's possible the client wants a dir.
2405: # removed, in which case rmdir is more approprate:
2406: #
2407: if (-f $file){
2408: unlink($file);
2409: } elsif(-d $file) {
2410: rmdir($file);
2411: }
2412: if (-e $file) {
2413: # File is still there after we deleted it ?!?
2414:
2415: &Failure($client, "failed\n", "$cmd:$tail");
2416: } else {
2417: &Reply($client, "ok\n", "$cmd:$tail");
2418: }
2419: } else {
2420: &Failure($client, "not_found\n", "$cmd:$tail");
2421: }
2422: } else {
2423: &Failure($client, "not_home\n", "$cmd:$tail");
2424: }
2425: }
2426: return 1;
2427: }
2428: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2429:
2430: #
2431: # make a directory in a user's home directory userfiles subdirectory.
2432: # Parameters:
2433: # cmd - the Lond request keyword that got us here.
2434: # tail - the part of the command past the keyword.
2435: # client- File descriptor connected with the client.
2436: #
2437: # Returns:
2438: # 1 - Continue processing.
2439: sub mkdir_user_file_handler {
2440: my ($cmd, $tail, $client) = @_;
2441:
2442: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2443: $dir=&unescape($dir);
2444: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2445: if ($ufile =~m|/\.\./|) {
2446: # any files paths with /../ in them refuse
2447: # to deal with
2448: &Failure($client, "refused\n", "$cmd:$tail");
2449: } else {
2450: my $udir = &propath($udom,$uname);
2451: if (-e $udir) {
2452: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2453: if (!&mkpath($newdir)) {
2454: &Failure($client, "failed\n", "$cmd:$tail");
2455: }
2456: &Reply($client, "ok\n", "$cmd:$tail");
2457: } else {
2458: &Failure($client, "not_home\n", "$cmd:$tail");
2459: }
2460: }
2461: return 1;
2462: }
2463: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2464:
2465: #
2466: # rename a file in a user's home directory userfiles subdirectory.
2467: # Parameters:
2468: # cmd - the Lond request keyword that got us here.
2469: # tail - the part of the command past the keyword.
2470: # client- File descriptor connected with the client.
2471: #
2472: # Returns:
2473: # 1 - Continue processing.
2474: sub rename_user_file_handler {
2475: my ($cmd, $tail, $client) = @_;
2476:
2477: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2478: $old=&unescape($old);
2479: $new=&unescape($new);
2480: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2481: # any files paths with /../ in them refuse to deal with
2482: &Failure($client, "refused\n", "$cmd:$tail");
2483: } else {
2484: my $udir = &propath($udom,$uname);
2485: if (-e $udir) {
2486: my $oldfile=$udir.'/userfiles/'.$old;
2487: my $newfile=$udir.'/userfiles/'.$new;
2488: if (-e $newfile) {
2489: &Failure($client, "exists\n", "$cmd:$tail");
2490: } elsif (! -e $oldfile) {
2491: &Failure($client, "not_found\n", "$cmd:$tail");
2492: } else {
2493: if (!rename($oldfile,$newfile)) {
2494: &Failure($client, "failed\n", "$cmd:$tail");
2495: } else {
2496: &Reply($client, "ok\n", "$cmd:$tail");
2497: }
2498: }
2499: } else {
2500: &Failure($client, "not_home\n", "$cmd:$tail");
2501: }
2502: }
2503: return 1;
2504: }
2505: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2506:
2507: #
2508: # Checks if the specified user has an active session on the server
2509: # return ok if so, not_found if not
2510: #
2511: # Parameters:
2512: # cmd - The request keyword that dispatched to tus.
2513: # tail - The tail of the request (colon separated parameters).
2514: # client - Filehandle open on the client.
2515: # Return:
2516: # 1.
2517: sub user_has_session_handler {
2518: my ($cmd, $tail, $client) = @_;
2519:
2520: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2521:
2522: opendir(DIR,$perlvar{'lonIDsDir'});
2523: my $filename;
2524: while ($filename=readdir(DIR)) {
2525: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2526: }
2527: if ($filename) {
2528: &Reply($client, "ok\n", "$cmd:$tail");
2529: } else {
2530: &Failure($client, "not_found\n", "$cmd:$tail");
2531: }
2532: return 1;
2533:
2534: }
2535: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2536:
2537: #
2538: # Authenticate access to a user file by checking that the token the user's
2539: # passed also exists in their session file
2540: #
2541: # Parameters:
2542: # cmd - The request keyword that dispatched to tus.
2543: # tail - The tail of the request (colon separated parameters).
2544: # client - Filehandle open on the client.
2545: # Return:
2546: # 1.
2547: sub token_auth_user_file_handler {
2548: my ($cmd, $tail, $client) = @_;
2549:
2550: my ($fname, $session) = split(/:/, $tail);
2551:
2552: chomp($session);
2553: my $reply="non_auth";
2554: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2555: if (open(ENVIN,"$file")) {
2556: flock(ENVIN,LOCK_SH);
2557: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2558: if (exists($disk_env{"userfile.$fname"})) {
2559: $reply="ok";
2560: } else {
2561: foreach my $envname (keys(%disk_env)) {
2562: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2563: $reply="ok";
2564: last;
2565: }
2566: }
2567: }
2568: untie(%disk_env);
2569: close(ENVIN);
2570: &Reply($client, \$reply, "$cmd:$tail");
2571: } else {
2572: &Failure($client, "invalid_token\n", "$cmd:$tail");
2573: }
2574: return 1;
2575:
2576: }
2577: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2578:
2579: #
2580: # Unsubscribe from a resource.
2581: #
2582: # Parameters:
2583: # $cmd - The command that got us here.
2584: # $tail - Tail of the command (remaining parameters).
2585: # $client - File descriptor connected to client.
2586: # Returns
2587: # 0 - Requested to exit, caller should shut down.
2588: # 1 - Continue processing.
2589: #
2590: sub unsubscribe_handler {
2591: my ($cmd, $tail, $client) = @_;
2592:
2593: my $userinput= "$cmd:$tail";
2594:
2595: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2596:
2597: &Debug("Unsubscribing $fname");
2598: if (-e $fname) {
2599: &Debug("Exists");
2600: &Reply($client, &unsub($fname,$clientip), $userinput);
2601: } else {
2602: &Failure($client, "not_found\n", $userinput);
2603: }
2604: return 1;
2605: }
2606: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2607:
2608: # Subscribe to a resource
2609: #
2610: # Parameters:
2611: # $cmd - The command that got us here.
2612: # $tail - Tail of the command (remaining parameters).
2613: # $client - File descriptor connected to client.
2614: # Returns
2615: # 0 - Requested to exit, caller should shut down.
2616: # 1 - Continue processing.
2617: #
2618: sub subscribe_handler {
2619: my ($cmd, $tail, $client)= @_;
2620:
2621: my $userinput = "$cmd:$tail";
2622:
2623: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2624:
2625: return 1;
2626: }
2627: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2628:
2629: #
2630: # Determine the latest version of a resource (it looks for the highest
2631: # past version and then returns that +1)
2632: #
2633: # Parameters:
2634: # $cmd - The command that got us here.
2635: # $tail - Tail of the command (remaining parameters).
2636: # (Should consist of an absolute path to a file)
2637: # $client - File descriptor connected to client.
2638: # Returns
2639: # 0 - Requested to exit, caller should shut down.
2640: # 1 - Continue processing.
2641: #
2642: sub current_version_handler {
2643: my ($cmd, $tail, $client) = @_;
2644:
2645: my $userinput= "$cmd:$tail";
2646:
2647: my $fname = $tail;
2648: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2649: return 1;
2650:
2651: }
2652: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2653:
2654: # Make an entry in a user's activity log.
2655: #
2656: # Parameters:
2657: # $cmd - The command that got us here.
2658: # $tail - Tail of the command (remaining parameters).
2659: # $client - File descriptor connected to client.
2660: # Returns
2661: # 0 - Requested to exit, caller should shut down.
2662: # 1 - Continue processing.
2663: #
2664: sub activity_log_handler {
2665: my ($cmd, $tail, $client) = @_;
2666:
2667:
2668: my $userinput= "$cmd:$tail";
2669:
2670: my ($udom,$uname,$what)=split(/:/,$tail);
2671: chomp($what);
2672: my $proname=&propath($udom,$uname);
2673: my $now=time;
2674: my $hfh;
2675: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2676: print $hfh "$now:$clientname:$what\n";
2677: &Reply( $client, "ok\n", $userinput);
2678: } else {
2679: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2680: ."while attempting log\n",
2681: $userinput);
2682: }
2683:
2684: return 1;
2685: }
2686: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2687:
2688: #
2689: # Put a namespace entry in a user profile hash.
2690: # My druthers would be for this to be an encrypted interaction too.
2691: # anything that might be an inadvertent covert channel about either
2692: # user authentication or user personal information....
2693: #
2694: # Parameters:
2695: # $cmd - The command that got us here.
2696: # $tail - Tail of the command (remaining parameters).
2697: # $client - File descriptor connected to client.
2698: # Returns
2699: # 0 - Requested to exit, caller should shut down.
2700: # 1 - Continue processing.
2701: #
2702: sub put_user_profile_entry {
2703: my ($cmd, $tail, $client) = @_;
2704:
2705: my $userinput = "$cmd:$tail";
2706:
2707: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2708: if ($namespace ne 'roles') {
2709: chomp($what);
2710: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2711: &GDBM_WRCREAT(),"P",$what);
2712: if($hashref) {
2713: my @pairs=split(/\&/,$what);
2714: foreach my $pair (@pairs) {
2715: my ($key,$value)=split(/=/,$pair);
2716: $hashref->{$key}=$value;
2717: }
2718: if (&untie_user_hash($hashref)) {
2719: &Reply( $client, "ok\n", $userinput);
2720: } else {
2721: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2722: "while attempting put\n",
2723: $userinput);
2724: }
2725: } else {
2726: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2727: "while attempting put\n", $userinput);
2728: }
2729: } else {
2730: &Failure( $client, "refused\n", $userinput);
2731: }
2732:
2733: return 1;
2734: }
2735: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2736:
2737: # Put a piece of new data in hash, returns error if entry already exists
2738: # Parameters:
2739: # $cmd - The command that got us here.
2740: # $tail - Tail of the command (remaining parameters).
2741: # $client - File descriptor connected to client.
2742: # Returns
2743: # 0 - Requested to exit, caller should shut down.
2744: # 1 - Continue processing.
2745: #
2746: sub newput_user_profile_entry {
2747: my ($cmd, $tail, $client) = @_;
2748:
2749: my $userinput = "$cmd:$tail";
2750:
2751: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2752: if ($namespace eq 'roles') {
2753: &Failure( $client, "refused\n", $userinput);
2754: return 1;
2755: }
2756:
2757: chomp($what);
2758:
2759: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2760: &GDBM_WRCREAT(),"N",$what);
2761: if(!$hashref) {
2762: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2763: "while attempting put\n", $userinput);
2764: return 1;
2765: }
2766:
2767: my @pairs=split(/\&/,$what);
2768: foreach my $pair (@pairs) {
2769: my ($key,$value)=split(/=/,$pair);
2770: if (exists($hashref->{$key})) {
2771: &Failure($client, "key_exists: ".$key."\n",$userinput);
2772: return 1;
2773: }
2774: }
2775:
2776: foreach my $pair (@pairs) {
2777: my ($key,$value)=split(/=/,$pair);
2778: $hashref->{$key}=$value;
2779: }
2780:
2781: if (&untie_user_hash($hashref)) {
2782: &Reply( $client, "ok\n", $userinput);
2783: } else {
2784: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2785: "while attempting put\n",
2786: $userinput);
2787: }
2788: return 1;
2789: }
2790: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2791:
2792: #
2793: # Increment a profile entry in the user history file.
2794: # The history contains keyword value pairs. In this case,
2795: # The value itself is a pair of numbers. The first, the current value
2796: # the second an increment that this function applies to the current
2797: # value.
2798: #
2799: # Parameters:
2800: # $cmd - The command that got us here.
2801: # $tail - Tail of the command (remaining parameters).
2802: # $client - File descriptor connected to client.
2803: # Returns
2804: # 0 - Requested to exit, caller should shut down.
2805: # 1 - Continue processing.
2806: #
2807: sub increment_user_value_handler {
2808: my ($cmd, $tail, $client) = @_;
2809:
2810: my $userinput = "$cmd:$tail";
2811:
2812: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2813: if ($namespace ne 'roles') {
2814: chomp($what);
2815: my $hashref = &tie_user_hash($udom, $uname,
2816: $namespace, &GDBM_WRCREAT(),
2817: "P",$what);
2818: if ($hashref) {
2819: my @pairs=split(/\&/,$what);
2820: foreach my $pair (@pairs) {
2821: my ($key,$value)=split(/=/,$pair);
2822: $value = &unescape($value);
2823: # We could check that we have a number...
2824: if (! defined($value) || $value eq '') {
2825: $value = 1;
2826: }
2827: $hashref->{$key}+=$value;
2828: if ($namespace eq 'nohist_resourcetracker') {
2829: if ($hashref->{$key} < 0) {
2830: $hashref->{$key} = 0;
2831: }
2832: }
2833: }
2834: if (&untie_user_hash($hashref)) {
2835: &Reply( $client, "ok\n", $userinput);
2836: } else {
2837: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2838: "while attempting inc\n", $userinput);
2839: }
2840: } else {
2841: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2842: "while attempting inc\n", $userinput);
2843: }
2844: } else {
2845: &Failure($client, "refused\n", $userinput);
2846: }
2847:
2848: return 1;
2849: }
2850: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2851:
2852: #
2853: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2854: # Each 'role' a user has implies a set of permissions. Adding a new role
2855: # for a person grants the permissions packaged with that role
2856: # to that user when the role is selected.
2857: #
2858: # Parameters:
2859: # $cmd - The command string (rolesput).
2860: # $tail - The remainder of the request line. For rolesput this
2861: # consists of a colon separated list that contains:
2862: # The domain and user that is granting the role (logged).
2863: # The domain and user that is getting the role.
2864: # The roles being granted as a set of & separated pairs.
2865: # each pair a key value pair.
2866: # $client - File descriptor connected to the client.
2867: # Returns:
2868: # 0 - If the daemon should exit
2869: # 1 - To continue processing.
2870: #
2871: #
2872: sub roles_put_handler {
2873: my ($cmd, $tail, $client) = @_;
2874:
2875: my $userinput = "$cmd:$tail";
2876:
2877: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2878:
2879:
2880: my $namespace='roles';
2881: chomp($what);
2882: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2883: &GDBM_WRCREAT(), "P",
2884: "$exedom:$exeuser:$what");
2885: #
2886: # Log the attempt to set a role. The {}'s here ensure that the file
2887: # handle is open for the minimal amount of time. Since the flush
2888: # is done on close this improves the chances the log will be an un-
2889: # corrupted ordered thing.
2890: if ($hashref) {
2891: my $pass_entry = &get_auth_type($udom, $uname);
2892: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2893: $auth_type = $auth_type.":";
2894: my @pairs=split(/\&/,$what);
2895: foreach my $pair (@pairs) {
2896: my ($key,$value)=split(/=/,$pair);
2897: &manage_permissions($key, $udom, $uname,
2898: $auth_type);
2899: $hashref->{$key}=$value;
2900: }
2901: if (&untie_user_hash($hashref)) {
2902: &Reply($client, "ok\n", $userinput);
2903: } else {
2904: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2905: "while attempting rolesput\n", $userinput);
2906: }
2907: } else {
2908: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2909: "while attempting rolesput\n", $userinput);
2910: }
2911: return 1;
2912: }
2913: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2914:
2915: #
2916: # Deletes (removes) a role for a user. This is equivalent to removing
2917: # a permissions package associated with the role from the user's profile.
2918: #
2919: # Parameters:
2920: # $cmd - The command (rolesdel)
2921: # $tail - The remainder of the request line. This consists
2922: # of:
2923: # The domain and user requesting the change (logged)
2924: # The domain and user being changed.
2925: # The roles being revoked. These are shipped to us
2926: # as a bunch of & separated role name keywords.
2927: # $client - The file handle open on the client.
2928: # Returns:
2929: # 1 - Continue processing
2930: # 0 - Exit.
2931: #
2932: sub roles_delete_handler {
2933: my ($cmd, $tail, $client) = @_;
2934:
2935: my $userinput = "$cmd:$tail";
2936:
2937: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2938: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2939: "what = ".$what);
2940: my $namespace='roles';
2941: chomp($what);
2942: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2943: &GDBM_WRCREAT(), "D",
2944: "$exedom:$exeuser:$what");
2945:
2946: if ($hashref) {
2947: my @rolekeys=split(/\&/,$what);
2948:
2949: foreach my $key (@rolekeys) {
2950: delete $hashref->{$key};
2951: }
2952: if (&untie_user_hash($hashref)) {
2953: &Reply($client, "ok\n", $userinput);
2954: } else {
2955: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2956: "while attempting rolesdel\n", $userinput);
2957: }
2958: } else {
2959: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2960: "while attempting rolesdel\n", $userinput);
2961: }
2962:
2963: return 1;
2964: }
2965: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2966:
2967: # Unencrypted get from a user's profile database. See
2968: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2969: # This function retrieves a keyed item from a specific named database in the
2970: # user's directory.
2971: #
2972: # Parameters:
2973: # $cmd - Command request keyword (get).
2974: # $tail - Tail of the command. This is a colon separated list
2975: # consisting of the domain and username that uniquely
2976: # identifies the profile,
2977: # The 'namespace' which selects the gdbm file to
2978: # do the lookup in,
2979: # & separated list of keys to lookup. Note that
2980: # the values are returned as an & separated list too.
2981: # $client - File descriptor open on the client.
2982: # Returns:
2983: # 1 - Continue processing.
2984: # 0 - Exit.
2985: #
2986: sub get_profile_entry {
2987: my ($cmd, $tail, $client) = @_;
2988:
2989: my $userinput= "$cmd:$tail";
2990:
2991: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2992: chomp($what);
2993:
2994:
2995: my $replystring = read_profile($udom, $uname, $namespace, $what);
2996: my ($first) = split(/:/,$replystring);
2997: if($first ne "error") {
2998: &Reply($client, \$replystring, $userinput);
2999: } else {
3000: &Failure($client, $replystring." while attempting get\n", $userinput);
3001: }
3002: return 1;
3003:
3004:
3005: }
3006: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3007:
3008: #
3009: # Process the encrypted get request. Note that the request is sent
3010: # in clear, but the reply is encrypted. This is a small covert channel:
3011: # information about the sensitive keys is given to the snooper. Just not
3012: # information about the values of the sensitive key. Hmm if I wanted to
3013: # know these I'd snoop for the egets. Get the profile item names from them
3014: # and then issue a get for them since there's no enforcement of the
3015: # requirement of an encrypted get for particular profile items. If I
3016: # were re-doing this, I'd force the request to be encrypted as well as the
3017: # reply. I'd also just enforce encrypted transactions for all gets since
3018: # that would prevent any covert channel snooping.
3019: #
3020: # Parameters:
3021: # $cmd - Command keyword of request (eget).
3022: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
3023: # $client - File open on the client.
3024: # Returns:
3025: # 1 - Continue processing
3026: # 0 - server should exit.
3027: sub get_profile_entry_encrypted {
3028: my ($cmd, $tail, $client) = @_;
3029:
3030: my $userinput = "$cmd:$tail";
3031:
3032: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3033: chomp($what);
3034: my $qresult = read_profile($udom, $uname, $namespace, $what);
3035: my ($first) = split(/:/, $qresult);
3036: if($first ne "error") {
3037:
3038: if ($cipher) {
3039: my $cmdlength=length($qresult);
3040: $qresult.=" ";
3041: my $encqresult='';
3042: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3043: $encqresult.= unpack("H16",
3044: $cipher->encrypt(substr($qresult,
3045: $encidx,
3046: 8)));
3047: }
3048: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3049: } else {
3050: &Failure( $client, "error:no_key\n", $userinput);
3051: }
3052: } else {
3053: &Failure($client, "$qresult while attempting eget\n", $userinput);
3054:
3055: }
3056:
3057: return 1;
3058: }
3059: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3060:
3061: #
3062: # Deletes a key in a user profile database.
3063: #
3064: # Parameters:
3065: # $cmd - Command keyword (del).
3066: # $tail - Command tail. IN this case a colon
3067: # separated list containing:
3068: # The domain and user that identifies uniquely
3069: # the identity of the user.
3070: # The profile namespace (name of the profile
3071: # database file).
3072: # & separated list of keywords to delete.
3073: # $client - File open on client socket.
3074: # Returns:
3075: # 1 - Continue processing
3076: # 0 - Exit server.
3077: #
3078: #
3079: sub delete_profile_entry {
3080: my ($cmd, $tail, $client) = @_;
3081:
3082: my $userinput = "cmd:$tail";
3083:
3084: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3085: chomp($what);
3086: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3087: &GDBM_WRCREAT(),
3088: "D",$what);
3089: if ($hashref) {
3090: my @keys=split(/\&/,$what);
3091: foreach my $key (@keys) {
3092: delete($hashref->{$key});
3093: }
3094: if (&untie_user_hash($hashref)) {
3095: &Reply($client, "ok\n", $userinput);
3096: } else {
3097: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3098: "while attempting del\n", $userinput);
3099: }
3100: } else {
3101: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3102: "while attempting del\n", $userinput);
3103: }
3104: return 1;
3105: }
3106: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3107:
3108: #
3109: # List the set of keys that are defined in a profile database file.
3110: # A successful reply from this will contain an & separated list of
3111: # the keys.
3112: # Parameters:
3113: # $cmd - Command request (keys).
3114: # $tail - Remainder of the request, a colon separated
3115: # list containing domain/user that identifies the
3116: # user being queried, and the database namespace
3117: # (database filename essentially).
3118: # $client - File open on the client.
3119: # Returns:
3120: # 1 - Continue processing.
3121: # 0 - Exit the server.
3122: #
3123: sub get_profile_keys {
3124: my ($cmd, $tail, $client) = @_;
3125:
3126: my $userinput = "$cmd:$tail";
3127:
3128: my ($udom,$uname,$namespace)=split(/:/,$tail);
3129: my $qresult='';
3130: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3131: &GDBM_READER());
3132: if ($hashref) {
3133: foreach my $key (keys %$hashref) {
3134: $qresult.="$key&";
3135: }
3136: if (&untie_user_hash($hashref)) {
3137: $qresult=~s/\&$//;
3138: &Reply($client, \$qresult, $userinput);
3139: } else {
3140: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3141: "while attempting keys\n", $userinput);
3142: }
3143: } else {
3144: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3145: "while attempting keys\n", $userinput);
3146: }
3147:
3148: return 1;
3149: }
3150: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3151:
3152: #
3153: # Dump the contents of a user profile database.
3154: # Note that this constitutes a very large covert channel too since
3155: # the dump will return sensitive information that is not encrypted.
3156: # The naive security assumption is that the session negotiation ensures
3157: # our client is trusted and I don't believe that's assured at present.
3158: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3159: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3160: #
3161: # Parameters:
3162: # $cmd - The command request keyword (currentdump).
3163: # $tail - Remainder of the request, consisting of a colon
3164: # separated list that has the domain/username and
3165: # the namespace to dump (database file).
3166: # $client - file open on the remote client.
3167: # Returns:
3168: # 1 - Continue processing.
3169: # 0 - Exit the server.
3170: #
3171: sub dump_profile_database {
3172: my ($cmd, $tail, $client) = @_;
3173:
3174: my $userinput = "$cmd:$tail";
3175:
3176: my ($udom,$uname,$namespace) = split(/:/,$tail);
3177: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3178: &GDBM_READER());
3179: if ($hashref) {
3180: # Structure of %data:
3181: # $data{$symb}->{$parameter}=$value;
3182: # $data{$symb}->{'v.'.$parameter}=$version;
3183: # since $parameter will be unescaped, we do not
3184: # have to worry about silly parameter names...
3185:
3186: my $qresult='';
3187: my %data = (); # A hash of anonymous hashes..
3188: while (my ($key,$value) = each(%$hashref)) {
3189: my ($v,$symb,$param) = split(/:/,$key);
3190: next if ($v eq 'version' || $symb eq 'keys');
3191: next if (exists($data{$symb}) &&
3192: exists($data{$symb}->{$param}) &&
3193: $data{$symb}->{'v.'.$param} > $v);
3194: $data{$symb}->{$param}=$value;
3195: $data{$symb}->{'v.'.$param}=$v;
3196: }
3197: if (&untie_user_hash($hashref)) {
3198: while (my ($symb,$param_hash) = each(%data)) {
3199: while(my ($param,$value) = each (%$param_hash)){
3200: next if ($param =~ /^v\./); # Ignore versions...
3201: #
3202: # Just dump the symb=value pairs separated by &
3203: #
3204: $qresult.=$symb.':'.$param.'='.$value.'&';
3205: }
3206: }
3207: chop($qresult);
3208: &Reply($client , \$qresult, $userinput);
3209: } else {
3210: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3211: "while attempting currentdump\n", $userinput);
3212: }
3213: } else {
3214: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3215: "while attempting currentdump\n", $userinput);
3216: }
3217:
3218: return 1;
3219: }
3220: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3221:
3222: #
3223: # Dump a profile database with an optional regular expression
3224: # to match against the keys. In this dump, no effort is made
3225: # to separate symb from version information. Presumably the
3226: # databases that are dumped by this command are of a different
3227: # structure. Need to look at this and improve the documentation of
3228: # both this and the currentdump handler.
3229: # Parameters:
3230: # $cmd - The command keyword.
3231: # $tail - All of the characters after the $cmd:
3232: # These are expected to be a colon
3233: # separated list containing:
3234: # domain/user - identifying the user.
3235: # namespace - identifying the database.
3236: # regexp - optional regular expression
3237: # that is matched against
3238: # database keywords to do
3239: # selective dumps.
3240: # range - optional range of entries
3241: # e.g., 10-20 would return the
3242: # 10th to 19th items, etc.
3243: # $client - Channel open on the client.
3244: # Returns:
3245: # 1 - Continue processing.
3246: # Side effects:
3247: # response is written to $client.
3248: #
3249: sub dump_with_regexp {
3250: my ($cmd, $tail, $client) = @_;
3251:
3252: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3253:
3254: if ($res =~ /^error:/) {
3255: &Failure($client, \$res, "$cmd:$tail");
3256: } else {
3257: &Reply($client, \$res, "$cmd:$tail");
3258: }
3259:
3260: return 1;
3261: }
3262: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3263:
3264: # Store a set of key=value pairs associated with a versioned name.
3265: #
3266: # Parameters:
3267: # $cmd - Request command keyword.
3268: # $tail - Tail of the request. This is a colon
3269: # separated list containing:
3270: # domain/user - User and authentication domain.
3271: # namespace - Name of the database being modified
3272: # rid - Resource keyword to modify.
3273: # what - new value associated with rid.
3274: #
3275: # $client - Socket open on the client.
3276: #
3277: #
3278: # Returns:
3279: # 1 (keep on processing).
3280: # Side-Effects:
3281: # Writes to the client
3282: sub store_handler {
3283: my ($cmd, $tail, $client) = @_;
3284:
3285: my $userinput = "$cmd:$tail";
3286:
3287: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3288: if ($namespace ne 'roles') {
3289:
3290: chomp($what);
3291: my @pairs=split(/\&/,$what);
3292: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3293: &GDBM_WRCREAT(), "S",
3294: "$rid:$what");
3295: if ($hashref) {
3296: my $now = time;
3297: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3298: my $key;
3299: $hashref->{"version:$rid"}++;
3300: my $version=$hashref->{"version:$rid"};
3301: my $allkeys='';
3302: foreach my $pair (@pairs) {
3303: my ($key,$value)=split(/=/,$pair);
3304: $allkeys.=$key.':';
3305: $hashref->{"$version:$rid:$key"}=$value;
3306: }
3307: $hashref->{"$version:$rid:timestamp"}=$now;
3308: $allkeys.='timestamp';
3309: $hashref->{"$version:keys:$rid"}=$allkeys;
3310: if (&untie_user_hash($hashref)) {
3311: &Reply($client, "ok\n", $userinput);
3312: } else {
3313: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3314: "while attempting store\n", $userinput);
3315: }
3316: } else {
3317: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3318: "while attempting store\n", $userinput);
3319: }
3320: } else {
3321: &Failure($client, "refused\n", $userinput);
3322: }
3323:
3324: return 1;
3325: }
3326: ®ister_handler("store", \&store_handler, 0, 1, 0);
3327:
3328: # Modify a set of key=value pairs associated with a versioned name.
3329: #
3330: # Parameters:
3331: # $cmd - Request command keyword.
3332: # $tail - Tail of the request. This is a colon
3333: # separated list containing:
3334: # domain/user - User and authentication domain.
3335: # namespace - Name of the database being modified
3336: # rid - Resource keyword to modify.
3337: # v - Version item to modify
3338: # what - new value associated with rid.
3339: #
3340: # $client - Socket open on the client.
3341: #
3342: #
3343: # Returns:
3344: # 1 (keep on processing).
3345: # Side-Effects:
3346: # Writes to the client
3347: sub putstore_handler {
3348: my ($cmd, $tail, $client) = @_;
3349:
3350: my $userinput = "$cmd:$tail";
3351:
3352: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3353: if ($namespace ne 'roles') {
3354:
3355: chomp($what);
3356: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3357: &GDBM_WRCREAT(), "M",
3358: "$rid:$v:$what");
3359: if ($hashref) {
3360: my $now = time;
3361: my %data = &hash_extract($what);
3362: my @allkeys;
3363: while (my($key,$value) = each(%data)) {
3364: push(@allkeys,$key);
3365: $hashref->{"$v:$rid:$key"} = $value;
3366: }
3367: my $allkeys = join(':',@allkeys);
3368: $hashref->{"$v:keys:$rid"}=$allkeys;
3369:
3370: if (&untie_user_hash($hashref)) {
3371: &Reply($client, "ok\n", $userinput);
3372: } else {
3373: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3374: "while attempting store\n", $userinput);
3375: }
3376: } else {
3377: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3378: "while attempting store\n", $userinput);
3379: }
3380: } else {
3381: &Failure($client, "refused\n", $userinput);
3382: }
3383:
3384: return 1;
3385: }
3386: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3387:
3388: sub hash_extract {
3389: my ($str)=@_;
3390: my %hash;
3391: foreach my $pair (split(/\&/,$str)) {
3392: my ($key,$value)=split(/=/,$pair);
3393: $hash{$key}=$value;
3394: }
3395: return (%hash);
3396: }
3397: sub hash_to_str {
3398: my ($hash_ref)=@_;
3399: my $str;
3400: foreach my $key (keys(%$hash_ref)) {
3401: $str.=$key.'='.$hash_ref->{$key}.'&';
3402: }
3403: $str=~s/\&$//;
3404: return $str;
3405: }
3406:
3407: #
3408: # Dump out all versions of a resource that has key=value pairs associated
3409: # with it for each version. These resources are built up via the store
3410: # command.
3411: #
3412: # Parameters:
3413: # $cmd - Command keyword.
3414: # $tail - Remainder of the request which consists of:
3415: # domain/user - User and auth. domain.
3416: # namespace - name of resource database.
3417: # rid - Resource id.
3418: # $client - socket open on the client.
3419: #
3420: # Returns:
3421: # 1 indicating the caller should not yet exit.
3422: # Side-effects:
3423: # Writes a reply to the client.
3424: # The reply is a string of the following shape:
3425: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3426: # Where the 1 above represents version 1.
3427: # this continues for all pairs of keys in all versions.
3428: #
3429: #
3430: #
3431: #
3432: sub restore_handler {
3433: my ($cmd, $tail, $client) = @_;
3434:
3435: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3436: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3437: $namespace=~s/\//\_/g;
3438: $namespace = &LONCAPA::clean_username($namespace);
3439:
3440: chomp($rid);
3441: my $qresult='';
3442: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3443: if ($hashref) {
3444: my $version=$hashref->{"version:$rid"};
3445: $qresult.="version=$version&";
3446: my $scope;
3447: for ($scope=1;$scope<=$version;$scope++) {
3448: my $vkeys=$hashref->{"$scope:keys:$rid"};
3449: my @keys=split(/:/,$vkeys);
3450: my $key;
3451: $qresult.="$scope:keys=$vkeys&";
3452: foreach $key (@keys) {
3453: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3454: }
3455: }
3456: if (&untie_user_hash($hashref)) {
3457: $qresult=~s/\&$//;
3458: &Reply( $client, \$qresult, $userinput);
3459: } else {
3460: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3461: "while attempting restore\n", $userinput);
3462: }
3463: } else {
3464: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3465: "while attempting restore\n", $userinput);
3466: }
3467:
3468: return 1;
3469:
3470:
3471: }
3472: ®ister_handler("restore", \&restore_handler, 0,1,0);
3473:
3474: #
3475: # Add a chat message to a synchronous discussion board.
3476: #
3477: # Parameters:
3478: # $cmd - Request keyword.
3479: # $tail - Tail of the command. A colon separated list
3480: # containing:
3481: # cdom - Domain on which the chat board lives
3482: # cnum - Course containing the chat board.
3483: # newpost - Body of the posting.
3484: # group - Optional group, if chat board is only
3485: # accessible in a group within the course
3486: # $client - Socket open on the client.
3487: # Returns:
3488: # 1 - Indicating caller should keep on processing.
3489: #
3490: # Side-effects:
3491: # writes a reply to the client.
3492: #
3493: #
3494: sub send_chat_handler {
3495: my ($cmd, $tail, $client) = @_;
3496:
3497:
3498: my $userinput = "$cmd:$tail";
3499:
3500: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3501: &chat_add($cdom,$cnum,$newpost,$group);
3502: &Reply($client, "ok\n", $userinput);
3503:
3504: return 1;
3505: }
3506: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3507:
3508: #
3509: # Retrieve the set of chat messages from a discussion board.
3510: #
3511: # Parameters:
3512: # $cmd - Command keyword that initiated the request.
3513: # $tail - Remainder of the request after the command
3514: # keyword. In this case a colon separated list of
3515: # chat domain - Which discussion board.
3516: # chat id - Discussion thread(?)
3517: # domain/user - Authentication domain and username
3518: # of the requesting person.
3519: # group - Optional course group containing
3520: # the board.
3521: # $client - Socket open on the client program.
3522: # Returns:
3523: # 1 - continue processing
3524: # Side effects:
3525: # Response is written to the client.
3526: #
3527: sub retrieve_chat_handler {
3528: my ($cmd, $tail, $client) = @_;
3529:
3530:
3531: my $userinput = "$cmd:$tail";
3532:
3533: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3534: my $reply='';
3535: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3536: $reply.=&escape($_).':';
3537: }
3538: $reply=~s/\:$//;
3539: &Reply($client, \$reply, $userinput);
3540:
3541:
3542: return 1;
3543: }
3544: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3545:
3546: #
3547: # Initiate a query of an sql database. SQL query repsonses get put in
3548: # a file for later retrieval. This prevents sql query results from
3549: # bottlenecking the system. Note that with loncnew, perhaps this is
3550: # less of an issue since multiple outstanding requests can be concurrently
3551: # serviced.
3552: #
3553: # Parameters:
3554: # $cmd - COmmand keyword that initiated the request.
3555: # $tail - Remainder of the command after the keyword.
3556: # For this function, this consists of a query and
3557: # 3 arguments that are self-documentingly labelled
3558: # in the original arg1, arg2, arg3.
3559: # $client - Socket open on the client.
3560: # Return:
3561: # 1 - Indicating processing should continue.
3562: # Side-effects:
3563: # a reply is written to $client.
3564: #
3565: sub send_query_handler {
3566: my ($cmd, $tail, $client) = @_;
3567:
3568:
3569: my $userinput = "$cmd:$tail";
3570:
3571: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3572: $query=~s/\n*$//g;
3573: &Reply($client, "". &sql_reply("$clientname\&$query".
3574: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3575: $userinput);
3576:
3577: return 1;
3578: }
3579: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3580:
3581: #
3582: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3583: # The query is submitted via a "querysend" transaction.
3584: # There it is passed on to the lonsql daemon, queued and issued to
3585: # mysql.
3586: # This transaction is invoked when the sql transaction is complete
3587: # it stores the query results in flie and indicates query completion.
3588: # presumably local software then fetches this response... I'm guessing
3589: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3590: # lonsql on completion of the query interacts with the lond of our
3591: # client to do a query reply storing two files:
3592: # - id - The results of the query.
3593: # - id.end - Indicating the transaction completed.
3594: # NOTE: id is a unique id assigned to the query and querysend time.
3595: # Parameters:
3596: # $cmd - Command keyword that initiated this request.
3597: # $tail - Remainder of the tail. In this case that's a colon
3598: # separated list containing the query Id and the
3599: # results of the query.
3600: # $client - Socket open on the client.
3601: # Return:
3602: # 1 - Indicating that we should continue processing.
3603: # Side effects:
3604: # ok written to the client.
3605: #
3606: sub reply_query_handler {
3607: my ($cmd, $tail, $client) = @_;
3608:
3609:
3610: my $userinput = "$cmd:$tail";
3611:
3612: my ($id,$reply)=split(/:/,$tail);
3613: my $store;
3614: my $execdir=$perlvar{'lonDaemons'};
3615: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3616: $reply=~s/\&/\n/g;
3617: print $store $reply;
3618: close $store;
3619: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3620: print $store2 "done\n";
3621: close $store2;
3622: &Reply($client, "ok\n", $userinput);
3623: } else {
3624: &Failure($client, "error: ".($!+0)
3625: ." IO::File->new Failed ".
3626: "while attempting queryreply\n", $userinput);
3627: }
3628:
3629:
3630: return 1;
3631: }
3632: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3633:
3634: #
3635: # Process the courseidput request. Not quite sure what this means
3636: # at the system level sense. It appears a gdbm file in the
3637: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3638: # a set of entries made in that database.
3639: #
3640: # Parameters:
3641: # $cmd - The command keyword that initiated this request.
3642: # $tail - Tail of the command. In this case consists of a colon
3643: # separated list contaning the domain to apply this to and
3644: # an ampersand separated list of keyword=value pairs.
3645: # Each value is a colon separated list that includes:
3646: # description, institutional code and course owner.
3647: # For backward compatibility with versions included
3648: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3649: # code and/or course owner are preserved from the existing
3650: # record when writing a new record in response to 1.1 or
3651: # 1.2 implementations of lonnet::flushcourselogs().
3652: #
3653: # $client - Socket open on the client.
3654: # Returns:
3655: # 1 - indicating that processing should continue
3656: #
3657: # Side effects:
3658: # reply is written to the client.
3659: #
3660: sub put_course_id_handler {
3661: my ($cmd, $tail, $client) = @_;
3662:
3663:
3664: my $userinput = "$cmd:$tail";
3665:
3666: my ($udom, $what) = split(/:/, $tail,2);
3667: chomp($what);
3668: my $now=time;
3669: my @pairs=split(/\&/,$what);
3670:
3671: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3672: if ($hashref) {
3673: foreach my $pair (@pairs) {
3674: my ($key,$courseinfo) = split(/=/,$pair,2);
3675: $courseinfo =~ s/=/:/g;
3676: if (defined($hashref->{$key})) {
3677: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3678: if (ref($value) eq 'HASH') {
3679: my @items = ('description','inst_code','owner','type');
3680: my @new_items = split(/:/,$courseinfo,-1);
3681: my %storehash;
3682: for (my $i=0; $i<@new_items; $i++) {
3683: $storehash{$items[$i]} = &unescape($new_items[$i]);
3684: }
3685: $hashref->{$key} =
3686: &Apache::lonnet::freeze_escape(\%storehash);
3687: my $unesc_key = &unescape($key);
3688: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3689: next;
3690: }
3691: }
3692: my @current_items = split(/:/,$hashref->{$key},-1);
3693: shift(@current_items); # remove description
3694: pop(@current_items); # remove last access
3695: my $numcurrent = scalar(@current_items);
3696: if ($numcurrent > 3) {
3697: $numcurrent = 3;
3698: }
3699: my @new_items = split(/:/,$courseinfo,-1);
3700: my $numnew = scalar(@new_items);
3701: if ($numcurrent > 0) {
3702: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3703: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3704: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3705: }
3706: }
3707: }
3708: $hashref->{$key}=$courseinfo.':'.$now;
3709: }
3710: if (&untie_domain_hash($hashref)) {
3711: &Reply( $client, "ok\n", $userinput);
3712: } else {
3713: &Failure($client, "error: ".($!+0)
3714: ." untie(GDBM) Failed ".
3715: "while attempting courseidput\n", $userinput);
3716: }
3717: } else {
3718: &Failure($client, "error: ".($!+0)
3719: ." tie(GDBM) Failed ".
3720: "while attempting courseidput\n", $userinput);
3721: }
3722:
3723: return 1;
3724: }
3725: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3726:
3727: sub put_course_id_hash_handler {
3728: my ($cmd, $tail, $client) = @_;
3729: my $userinput = "$cmd:$tail";
3730: my ($udom,$mode,$what) = split(/:/, $tail,3);
3731: chomp($what);
3732: my $now=time;
3733: my @pairs=split(/\&/,$what);
3734: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3735: if ($hashref) {
3736: foreach my $pair (@pairs) {
3737: my ($key,$value)=split(/=/,$pair);
3738: my $unesc_key = &unescape($key);
3739: if ($mode ne 'timeonly') {
3740: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3741: my $curritems = &Apache::lonnet::thaw_unescape($key);
3742: if (ref($curritems) ne 'HASH') {
3743: my @current_items = split(/:/,$hashref->{$key},-1);
3744: my $lasttime = pop(@current_items);
3745: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3746: } else {
3747: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3748: }
3749: }
3750: $hashref->{$key} = $value;
3751: }
3752: if ($mode ne 'notime') {
3753: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3754: }
3755: }
3756: if (&untie_domain_hash($hashref)) {
3757: &Reply($client, "ok\n", $userinput);
3758: } else {
3759: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3760: "while attempting courseidputhash\n", $userinput);
3761: }
3762: } else {
3763: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3764: "while attempting courseidputhash\n", $userinput);
3765: }
3766: return 1;
3767: }
3768: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3769:
3770: # Retrieves the value of a course id resource keyword pattern
3771: # defined since a starting date. Both the starting date and the
3772: # keyword pattern are optional. If the starting date is not supplied it
3773: # is treated as the beginning of time. If the pattern is not found,
3774: # it is treatred as "." matching everything.
3775: #
3776: # Parameters:
3777: # $cmd - Command keyword that resulted in us being dispatched.
3778: # $tail - The remainder of the command that, in this case, consists
3779: # of a colon separated list of:
3780: # domain - The domain in which the course database is
3781: # defined.
3782: # since - Optional parameter describing the minimum
3783: # time of definition(?) of the resources that
3784: # will match the dump.
3785: # description - regular expression that is used to filter
3786: # the dump. Only keywords matching this regexp
3787: # will be used.
3788: # institutional code - optional supplied code to filter
3789: # the dump. Only courses with an institutional code
3790: # that match the supplied code will be returned.
3791: # owner - optional supplied username and domain of owner to
3792: # filter the dump. Only courses for which the course
3793: # owner matches the supplied username and/or domain
3794: # will be returned. Pre-2.2.0 legacy entries from
3795: # nohist_courseiddump will only contain usernames.
3796: # type - optional parameter for selection
3797: # regexp_ok - if 1 or -1 allow the supplied institutional code
3798: # filter to behave as a regular expression:
3799: # 1 will not exclude the course if the instcode matches the RE
3800: # -1 will exclude the course if the instcode matches the RE
3801: # rtn_as_hash - whether to return the information available for
3802: # each matched item as a frozen hash of all
3803: # key, value pairs in the item's hash, or as a
3804: # colon-separated list of (in order) description,
3805: # institutional code, and course owner.
3806: # selfenrollonly - filter by courses allowing self-enrollment
3807: # now or in the future (selfenrollonly = 1).
3808: # catfilter - filter by course category, assigned to a course
3809: # using manually defined categories (i.e., not
3810: # self-cataloging based on on institutional code).
3811: # showhidden - include course in results even if course
3812: # was set to be excluded from course catalog (DC only).
3813: # caller - if set to 'coursecatalog', courses set to be hidden
3814: # from course catalog will be excluded from results (unless
3815: # overridden by "showhidden".
3816: # cloner - escaped username:domain of course cloner (if picking course to
3817: # clone).
3818: # cc_clone_list - escaped comma separated list of courses for which
3819: # course cloner has active CC role (and so can clone
3820: # automatically).
3821: # cloneonly - filter by courses for which cloner has rights to clone.
3822: # createdbefore - include courses for which creation date preceeded this date.
3823: # createdafter - include courses for which creation date followed this date.
3824: # creationcontext - include courses created in specified context
3825: #
3826: # domcloner - flag to indicate if user can create CCs in course's domain.
3827: # If so, ability to clone course is automatic.
3828: #
3829: # $client - The socket open on the client.
3830: # Returns:
3831: # 1 - Continue processing.
3832: # Side Effects:
3833: # a reply is written to $client.
3834: sub dump_course_id_handler {
3835: my ($cmd, $tail, $client) = @_;
3836: my $userinput = "$cmd:$tail";
3837:
3838: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3839: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
3840: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
3841: $creationcontext,$domcloner) =split(/:/,$tail);
3842: my $now = time;
3843: my ($cloneruname,$clonerudom,%cc_clone);
3844: if (defined($description)) {
3845: $description=&unescape($description);
3846: } else {
3847: $description='.';
3848: }
3849: if (defined($instcodefilter)) {
3850: $instcodefilter=&unescape($instcodefilter);
3851: } else {
3852: $instcodefilter='.';
3853: }
3854: my ($ownerunamefilter,$ownerdomfilter);
3855: if (defined($ownerfilter)) {
3856: $ownerfilter=&unescape($ownerfilter);
3857: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3858: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3859: $ownerunamefilter = $1;
3860: $ownerdomfilter = $2;
3861: } else {
3862: $ownerunamefilter = $ownerfilter;
3863: $ownerdomfilter = '';
3864: }
3865: }
3866: } else {
3867: $ownerfilter='.';
3868: }
3869:
3870: if (defined($coursefilter)) {
3871: $coursefilter=&unescape($coursefilter);
3872: } else {
3873: $coursefilter='.';
3874: }
3875: if (defined($typefilter)) {
3876: $typefilter=&unescape($typefilter);
3877: } else {
3878: $typefilter='.';
3879: }
3880: if (defined($regexp_ok)) {
3881: $regexp_ok=&unescape($regexp_ok);
3882: }
3883: if (defined($catfilter)) {
3884: $catfilter=&unescape($catfilter);
3885: }
3886: if (defined($cloner)) {
3887: $cloner = &unescape($cloner);
3888: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
3889: }
3890: if (defined($cc_clone_list)) {
3891: $cc_clone_list = &unescape($cc_clone_list);
3892: my @cc_cloners = split('&',$cc_clone_list);
3893: foreach my $cid (@cc_cloners) {
3894: my ($clonedom,$clonenum) = split(':',$cid);
3895: next if ($clonedom ne $udom);
3896: $cc_clone{$clonedom.'_'.$clonenum} = 1;
3897: }
3898: }
3899: if ($createdbefore ne '') {
3900: $createdbefore = &unescape($createdbefore);
3901: } else {
3902: $createdbefore = 0;
3903: }
3904: if ($createdafter ne '') {
3905: $createdafter = &unescape($createdafter);
3906: } else {
3907: $createdafter = 0;
3908: }
3909: if ($creationcontext ne '') {
3910: $creationcontext = &unescape($creationcontext);
3911: } else {
3912: $creationcontext = '.';
3913: }
3914: my $unpack = 1;
3915: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
3916: $typefilter eq '.') {
3917: $unpack = 0;
3918: }
3919: if (!defined($since)) { $since=0; }
3920: my $qresult='';
3921: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3922: if ($hashref) {
3923: while (my ($key,$value) = each(%$hashref)) {
3924: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
3925: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
3926: $context);
3927: $unesc_key = &unescape($key);
3928: if ($unesc_key =~ /^lasttime:/) {
3929: next;
3930: } else {
3931: $lasttime_key = &escape('lasttime:'.$unesc_key);
3932: }
3933: if ($hashref->{$lasttime_key} ne '') {
3934: $lasttime = $hashref->{$lasttime_key};
3935: next if ($lasttime<$since);
3936: }
3937: my ($canclone,$valchange);
3938: my $items = &Apache::lonnet::thaw_unescape($value);
3939: if (ref($items) eq 'HASH') {
3940: if ($hashref->{$lasttime_key} eq '') {
3941: next if ($since > 1);
3942: }
3943: $is_hash = 1;
3944: if ($domcloner) {
3945: $canclone = 1;
3946: } elsif (defined($clonerudom)) {
3947: if ($items->{'cloners'}) {
3948: my @cloneable = split(',',$items->{'cloners'});
3949: if (@cloneable) {
3950: if (grep(/^\*$/,@cloneable)) {
3951: $canclone = 1;
3952: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
3953: $canclone = 1;
3954: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
3955: $canclone = 1;
3956: }
3957: }
3958: unless ($canclone) {
3959: if ($cloneruname ne '' && $clonerudom ne '') {
3960: if ($cc_clone{$unesc_key}) {
3961: $canclone = 1;
3962: $items->{'cloners'} .= ','.$cloneruname.':'.
3963: $clonerudom;
3964: $valchange = 1;
3965: }
3966: }
3967: }
3968: } elsif (defined($cloneruname)) {
3969: if ($cc_clone{$unesc_key}) {
3970: $canclone = 1;
3971: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3972: $valchange = 1;
3973: }
3974: unless ($canclone) {
3975: if ($items->{'owner'} =~ /:/) {
3976: if ($items->{'owner'} eq $cloner) {
3977: $canclone = 1;
3978: }
3979: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
3980: $canclone = 1;
3981: }
3982: if ($canclone) {
3983: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3984: $valchange = 1;
3985: }
3986: }
3987: }
3988: }
3989: if ($unpack || !$rtn_as_hash) {
3990: $unesc_val{'descr'} = $items->{'description'};
3991: $unesc_val{'inst_code'} = $items->{'inst_code'};
3992: $unesc_val{'owner'} = $items->{'owner'};
3993: $unesc_val{'type'} = $items->{'type'};
3994: $unesc_val{'cloners'} = $items->{'cloners'};
3995: $unesc_val{'created'} = $items->{'created'};
3996: $unesc_val{'context'} = $items->{'context'};
3997: }
3998: $selfenroll_types = $items->{'selfenroll_types'};
3999: $selfenroll_end = $items->{'selfenroll_end_date'};
4000: $created = $items->{'created'};
4001: $context = $items->{'context'};
4002: if ($selfenrollonly) {
4003: next if (!$selfenroll_types);
4004: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4005: next;
4006: }
4007: }
4008: if ($creationcontext ne '.') {
4009: next if (($context ne '') && ($context ne $creationcontext));
4010: }
4011: if ($createdbefore > 0) {
4012: next if (($created eq '') || ($created > $createdbefore));
4013: }
4014: if ($createdafter > 0) {
4015: next if (($created eq '') || ($created <= $createdafter));
4016: }
4017: if ($catfilter ne '') {
4018: next if ($items->{'categories'} eq '');
4019: my @categories = split('&',$items->{'categories'});
4020: next if (@categories == 0);
4021: my @subcats = split('&',$catfilter);
4022: my $matchcat = 0;
4023: foreach my $cat (@categories) {
4024: if (grep(/^\Q$cat\E$/,@subcats)) {
4025: $matchcat = 1;
4026: last;
4027: }
4028: }
4029: next if (!$matchcat);
4030: }
4031: if ($caller eq 'coursecatalog') {
4032: if ($items->{'hidefromcat'} eq 'yes') {
4033: next if !$showhidden;
4034: }
4035: }
4036: } else {
4037: next if ($catfilter ne '');
4038: next if ($selfenrollonly);
4039: next if ($createdbefore || $createdafter);
4040: next if ($creationcontext ne '.');
4041: if ((defined($clonerudom)) && (defined($cloneruname))) {
4042: if ($cc_clone{$unesc_key}) {
4043: $canclone = 1;
4044: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4045: }
4046: }
4047: $is_hash = 0;
4048: my @courseitems = split(/:/,$value);
4049: $lasttime = pop(@courseitems);
4050: if ($hashref->{$lasttime_key} eq '') {
4051: next if ($lasttime<$since);
4052: }
4053: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4054: }
4055: if ($cloneonly) {
4056: next unless ($canclone);
4057: }
4058: my $match = 1;
4059: if ($description ne '.') {
4060: if (!$is_hash) {
4061: $unesc_val{'descr'} = &unescape($val{'descr'});
4062: }
4063: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4064: $match = 0;
4065: }
4066: }
4067: if ($instcodefilter ne '.') {
4068: if (!$is_hash) {
4069: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4070: }
4071: if ($regexp_ok == 1) {
4072: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4073: $match = 0;
4074: }
4075: } elsif ($regexp_ok == -1) {
4076: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4077: $match = 0;
4078: }
4079: } else {
4080: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4081: $match = 0;
4082: }
4083: }
4084: }
4085: if ($ownerfilter ne '.') {
4086: if (!$is_hash) {
4087: $unesc_val{'owner'} = &unescape($val{'owner'});
4088: }
4089: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4090: if ($unesc_val{'owner'} =~ /:/) {
4091: if (eval{$unesc_val{'owner'} !~
4092: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4093: $match = 0;
4094: }
4095: } else {
4096: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4097: $match = 0;
4098: }
4099: }
4100: } elsif ($ownerunamefilter ne '') {
4101: if ($unesc_val{'owner'} =~ /:/) {
4102: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4103: $match = 0;
4104: }
4105: } else {
4106: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4107: $match = 0;
4108: }
4109: }
4110: } elsif ($ownerdomfilter ne '') {
4111: if ($unesc_val{'owner'} =~ /:/) {
4112: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4113: $match = 0;
4114: }
4115: } else {
4116: if ($ownerdomfilter ne $udom) {
4117: $match = 0;
4118: }
4119: }
4120: }
4121: }
4122: if ($coursefilter ne '.') {
4123: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4124: $match = 0;
4125: }
4126: }
4127: if ($typefilter ne '.') {
4128: if (!$is_hash) {
4129: $unesc_val{'type'} = &unescape($val{'type'});
4130: }
4131: if ($unesc_val{'type'} eq '') {
4132: if ($typefilter ne 'Course') {
4133: $match = 0;
4134: }
4135: } else {
4136: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4137: $match = 0;
4138: }
4139: }
4140: }
4141: if ($match == 1) {
4142: if ($rtn_as_hash) {
4143: if ($is_hash) {
4144: if ($valchange) {
4145: my $newvalue = &Apache::lonnet::freeze_escape($items);
4146: $qresult.=$key.'='.$newvalue.'&';
4147: } else {
4148: $qresult.=$key.'='.$value.'&';
4149: }
4150: } else {
4151: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4152: 'inst_code' => &unescape($val{'inst_code'}),
4153: 'owner' => &unescape($val{'owner'}),
4154: 'type' => &unescape($val{'type'}),
4155: 'cloners' => &unescape($val{'cloners'}),
4156: );
4157: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4158: $qresult.=$key.'='.$items.'&';
4159: }
4160: } else {
4161: if ($is_hash) {
4162: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4163: &escape($unesc_val{'inst_code'}).':'.
4164: &escape($unesc_val{'owner'}).'&';
4165: } else {
4166: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4167: ':'.$val{'owner'}.'&';
4168: }
4169: }
4170: }
4171: }
4172: if (&untie_domain_hash($hashref)) {
4173: chop($qresult);
4174: &Reply($client, \$qresult, $userinput);
4175: } else {
4176: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4177: "while attempting courseiddump\n", $userinput);
4178: }
4179: } else {
4180: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4181: "while attempting courseiddump\n", $userinput);
4182: }
4183: return 1;
4184: }
4185: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4186:
4187: sub course_lastaccess_handler {
4188: my ($cmd, $tail, $client) = @_;
4189: my $userinput = "$cmd:$tail";
4190: my ($cdom,$cnum) = split(':',$tail);
4191: my (%lastaccess,$qresult);
4192: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4193: if ($hashref) {
4194: while (my ($key,$value) = each(%$hashref)) {
4195: my ($unesc_key,$lasttime);
4196: $unesc_key = &unescape($key);
4197: if ($cnum) {
4198: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4199: }
4200: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4201: $lastaccess{$1} = $value;
4202: } else {
4203: my $items = &Apache::lonnet::thaw_unescape($value);
4204: if (ref($items) eq 'HASH') {
4205: unless ($lastaccess{$unesc_key}) {
4206: $lastaccess{$unesc_key} = '';
4207: }
4208: } else {
4209: my @courseitems = split(':',$value);
4210: $lastaccess{$unesc_key} = pop(@courseitems);
4211: }
4212: }
4213: }
4214: foreach my $cid (sort(keys(%lastaccess))) {
4215: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4216: }
4217: if (&untie_domain_hash($hashref)) {
4218: if ($qresult) {
4219: chop($qresult);
4220: }
4221: &Reply($client, \$qresult, $userinput);
4222: } else {
4223: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4224: "while attempting lastacourseaccess\n", $userinput);
4225: }
4226: } else {
4227: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4228: "while attempting lastcourseaccess\n", $userinput);
4229: }
4230: return 1;
4231: }
4232: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4233:
4234: #
4235: # Puts an unencrypted entry in a namespace db file at the domain level
4236: #
4237: # Parameters:
4238: # $cmd - The command that got us here.
4239: # $tail - Tail of the command (remaining parameters).
4240: # $client - File descriptor connected to client.
4241: # Returns
4242: # 0 - Requested to exit, caller should shut down.
4243: # 1 - Continue processing.
4244: # Side effects:
4245: # reply is written to $client.
4246: #
4247: sub put_domain_handler {
4248: my ($cmd,$tail,$client) = @_;
4249:
4250: my $userinput = "$cmd:$tail";
4251:
4252: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4253: chomp($what);
4254: my @pairs=split(/\&/,$what);
4255: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4256: "P", $what);
4257: if ($hashref) {
4258: foreach my $pair (@pairs) {
4259: my ($key,$value)=split(/=/,$pair);
4260: $hashref->{$key}=$value;
4261: }
4262: if (&untie_domain_hash($hashref)) {
4263: &Reply($client, "ok\n", $userinput);
4264: } else {
4265: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4266: "while attempting putdom\n", $userinput);
4267: }
4268: } else {
4269: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4270: "while attempting putdom\n", $userinput);
4271: }
4272:
4273: return 1;
4274: }
4275: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4276:
4277: # Unencrypted get from the namespace database file at the domain level.
4278: # This function retrieves a keyed item from a specific named database in the
4279: # domain directory.
4280: #
4281: # Parameters:
4282: # $cmd - Command request keyword (get).
4283: # $tail - Tail of the command. This is a colon separated list
4284: # consisting of the domain and the 'namespace'
4285: # which selects the gdbm file to do the lookup in,
4286: # & separated list of keys to lookup. Note that
4287: # the values are returned as an & separated list too.
4288: # $client - File descriptor open on the client.
4289: # Returns:
4290: # 1 - Continue processing.
4291: # 0 - Exit.
4292: # Side effects:
4293: # reply is written to $client.
4294: #
4295:
4296: sub get_domain_handler {
4297: my ($cmd, $tail, $client) = @_;
4298:
4299:
4300: my $userinput = "$client:$tail";
4301:
4302: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4303: chomp($what);
4304: my @queries=split(/\&/,$what);
4305: my $qresult='';
4306: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4307: if ($hashref) {
4308: for (my $i=0;$i<=$#queries;$i++) {
4309: $qresult.="$hashref->{$queries[$i]}&";
4310: }
4311: if (&untie_domain_hash($hashref)) {
4312: $qresult=~s/\&$//;
4313: &Reply($client, \$qresult, $userinput);
4314: } else {
4315: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4316: "while attempting getdom\n",$userinput);
4317: }
4318: } else {
4319: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4320: "while attempting getdom\n",$userinput);
4321: }
4322:
4323: return 1;
4324: }
4325: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4326:
4327: #
4328: # Puts an id to a domains id database.
4329: #
4330: # Parameters:
4331: # $cmd - The command that triggered us.
4332: # $tail - Remainder of the request other than the command. This is a
4333: # colon separated list containing:
4334: # $domain - The domain for which we are writing the id.
4335: # $pairs - The id info to write... this is and & separated list
4336: # of keyword=value.
4337: # $client - Socket open on the client.
4338: # Returns:
4339: # 1 - Continue processing.
4340: # Side effects:
4341: # reply is written to $client.
4342: #
4343: sub put_id_handler {
4344: my ($cmd,$tail,$client) = @_;
4345:
4346:
4347: my $userinput = "$cmd:$tail";
4348:
4349: my ($udom,$what)=split(/:/,$tail);
4350: chomp($what);
4351: my @pairs=split(/\&/,$what);
4352: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4353: "P", $what);
4354: if ($hashref) {
4355: foreach my $pair (@pairs) {
4356: my ($key,$value)=split(/=/,$pair);
4357: $hashref->{$key}=$value;
4358: }
4359: if (&untie_domain_hash($hashref)) {
4360: &Reply($client, "ok\n", $userinput);
4361: } else {
4362: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4363: "while attempting idput\n", $userinput);
4364: }
4365: } else {
4366: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4367: "while attempting idput\n", $userinput);
4368: }
4369:
4370: return 1;
4371: }
4372: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4373:
4374: #
4375: # Retrieves a set of id values from the id database.
4376: # Returns an & separated list of results, one for each requested id to the
4377: # client.
4378: #
4379: # Parameters:
4380: # $cmd - Command keyword that caused us to be dispatched.
4381: # $tail - Tail of the command. Consists of a colon separated:
4382: # domain - the domain whose id table we dump
4383: # ids Consists of an & separated list of
4384: # id keywords whose values will be fetched.
4385: # nonexisting keywords will have an empty value.
4386: # $client - Socket open on the client.
4387: #
4388: # Returns:
4389: # 1 - indicating processing should continue.
4390: # Side effects:
4391: # An & separated list of results is written to $client.
4392: #
4393: sub get_id_handler {
4394: my ($cmd, $tail, $client) = @_;
4395:
4396:
4397: my $userinput = "$client:$tail";
4398:
4399: my ($udom,$what)=split(/:/,$tail);
4400: chomp($what);
4401: my @queries=split(/\&/,$what);
4402: my $qresult='';
4403: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4404: if ($hashref) {
4405: for (my $i=0;$i<=$#queries;$i++) {
4406: $qresult.="$hashref->{$queries[$i]}&";
4407: }
4408: if (&untie_domain_hash($hashref)) {
4409: $qresult=~s/\&$//;
4410: &Reply($client, \$qresult, $userinput);
4411: } else {
4412: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4413: "while attempting idget\n",$userinput);
4414: }
4415: } else {
4416: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4417: "while attempting idget\n",$userinput);
4418: }
4419:
4420: return 1;
4421: }
4422: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4423:
4424: # Deletes one or more ids in a domain's id database.
4425: #
4426: # Parameters:
4427: # $cmd - Command keyword (iddel).
4428: # $tail - Command tail. In this case a colon
4429: # separated list containing:
4430: # The domain for which we are deleting the id(s).
4431: # &-separated list of id(s) to delete.
4432: # $client - File open on client socket.
4433: # Returns:
4434: # 1 - Continue processing
4435: # 0 - Exit server.
4436: #
4437: #
4438:
4439: sub del_id_handler {
4440: my ($cmd,$tail,$client) = @_;
4441:
4442: my $userinput = "$cmd:$tail";
4443:
4444: my ($udom,$what)=split(/:/,$tail);
4445: chomp($what);
4446: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4447: "D", $what);
4448: if ($hashref) {
4449: my @keys=split(/\&/,$what);
4450: foreach my $key (@keys) {
4451: delete($hashref->{$key});
4452: }
4453: if (&untie_user_hash($hashref)) {
4454: &Reply($client, "ok\n", $userinput);
4455: } else {
4456: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4457: "while attempting iddel\n", $userinput);
4458: }
4459: } else {
4460: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4461: "while attempting iddel\n", $userinput);
4462: }
4463: return 1;
4464: }
4465: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
4466:
4467: #
4468: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4469: #
4470: # Parameters
4471: # $cmd - Command keyword that caused us to be dispatched.
4472: # $tail - Tail of the command. Consists of a colon separated:
4473: # domain - the domain whose dcmail we are recording
4474: # email Consists of key=value pair
4475: # where key is unique msgid
4476: # and value is message (in XML)
4477: # $client - Socket open on the client.
4478: #
4479: # Returns:
4480: # 1 - indicating processing should continue.
4481: # Side effects
4482: # reply is written to $client.
4483: #
4484: sub put_dcmail_handler {
4485: my ($cmd,$tail,$client) = @_;
4486: my $userinput = "$cmd:$tail";
4487:
4488:
4489: my ($udom,$what)=split(/:/,$tail);
4490: chomp($what);
4491: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4492: if ($hashref) {
4493: my ($key,$value)=split(/=/,$what);
4494: $hashref->{$key}=$value;
4495: }
4496: if (&untie_domain_hash($hashref)) {
4497: &Reply($client, "ok\n", $userinput);
4498: } else {
4499: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4500: "while attempting dcmailput\n", $userinput);
4501: }
4502: return 1;
4503: }
4504: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4505:
4506: #
4507: # Retrieves broadcast e-mail from nohist_dcmail database
4508: # Returns to client an & separated list of key=value pairs,
4509: # where key is msgid and value is message information.
4510: #
4511: # Parameters
4512: # $cmd - Command keyword that caused us to be dispatched.
4513: # $tail - Tail of the command. Consists of a colon separated:
4514: # domain - the domain whose dcmail table we dump
4515: # startfilter - beginning of time window
4516: # endfilter - end of time window
4517: # sendersfilter - & separated list of username:domain
4518: # for senders to search for.
4519: # $client - Socket open on the client.
4520: #
4521: # Returns:
4522: # 1 - indicating processing should continue.
4523: # Side effects
4524: # reply (& separated list of msgid=messageinfo pairs) is
4525: # written to $client.
4526: #
4527: sub dump_dcmail_handler {
4528: my ($cmd, $tail, $client) = @_;
4529:
4530: my $userinput = "$cmd:$tail";
4531: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4532: chomp($sendersfilter);
4533: my @senders = ();
4534: if (defined($startfilter)) {
4535: $startfilter=&unescape($startfilter);
4536: } else {
4537: $startfilter='.';
4538: }
4539: if (defined($endfilter)) {
4540: $endfilter=&unescape($endfilter);
4541: } else {
4542: $endfilter='.';
4543: }
4544: if (defined($sendersfilter)) {
4545: $sendersfilter=&unescape($sendersfilter);
4546: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
4547: }
4548:
4549: my $qresult='';
4550: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4551: if ($hashref) {
4552: while (my ($key,$value) = each(%$hashref)) {
4553: my $match = 1;
4554: my ($timestamp,$subj,$uname,$udom) =
4555: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
4556: $subj = &unescape($subj);
4557: unless ($startfilter eq '.' || !defined($startfilter)) {
4558: if ($timestamp < $startfilter) {
4559: $match = 0;
4560: }
4561: }
4562: unless ($endfilter eq '.' || !defined($endfilter)) {
4563: if ($timestamp > $endfilter) {
4564: $match = 0;
4565: }
4566: }
4567: unless (@senders < 1) {
4568: unless (grep/^$uname:$udom$/,@senders) {
4569: $match = 0;
4570: }
4571: }
4572: if ($match == 1) {
4573: $qresult.=$key.'='.$value.'&';
4574: }
4575: }
4576: if (&untie_domain_hash($hashref)) {
4577: chop($qresult);
4578: &Reply($client, \$qresult, $userinput);
4579: } else {
4580: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4581: "while attempting dcmaildump\n", $userinput);
4582: }
4583: } else {
4584: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4585: "while attempting dcmaildump\n", $userinput);
4586: }
4587: return 1;
4588: }
4589:
4590: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4591:
4592: #
4593: # Puts domain roles in nohist_domainroles database
4594: #
4595: # Parameters
4596: # $cmd - Command keyword that caused us to be dispatched.
4597: # $tail - Tail of the command. Consists of a colon separated:
4598: # domain - the domain whose roles we are recording
4599: # role - Consists of key=value pair
4600: # where key is unique role
4601: # and value is start/end date information
4602: # $client - Socket open on the client.
4603: #
4604: # Returns:
4605: # 1 - indicating processing should continue.
4606: # Side effects
4607: # reply is written to $client.
4608: #
4609:
4610: sub put_domainroles_handler {
4611: my ($cmd,$tail,$client) = @_;
4612:
4613: my $userinput = "$cmd:$tail";
4614: my ($udom,$what)=split(/:/,$tail);
4615: chomp($what);
4616: my @pairs=split(/\&/,$what);
4617: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4618: if ($hashref) {
4619: foreach my $pair (@pairs) {
4620: my ($key,$value)=split(/=/,$pair);
4621: $hashref->{$key}=$value;
4622: }
4623: if (&untie_domain_hash($hashref)) {
4624: &Reply($client, "ok\n", $userinput);
4625: } else {
4626: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4627: "while attempting domroleput\n", $userinput);
4628: }
4629: } else {
4630: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4631: "while attempting domroleput\n", $userinput);
4632: }
4633:
4634: return 1;
4635: }
4636:
4637: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4638:
4639: #
4640: # Retrieves domain roles from nohist_domainroles database
4641: # Returns to client an & separated list of key=value pairs,
4642: # where key is role and value is start and end date information.
4643: #
4644: # Parameters
4645: # $cmd - Command keyword that caused us to be dispatched.
4646: # $tail - Tail of the command. Consists of a colon separated:
4647: # domain - the domain whose domain roles table we dump
4648: # $client - Socket open on the client.
4649: #
4650: # Returns:
4651: # 1 - indicating processing should continue.
4652: # Side effects
4653: # reply (& separated list of role=start/end info pairs) is
4654: # written to $client.
4655: #
4656: sub dump_domainroles_handler {
4657: my ($cmd, $tail, $client) = @_;
4658:
4659: my $userinput = "$cmd:$tail";
4660: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4661: chomp($rolesfilter);
4662: my @roles = ();
4663: if (defined($startfilter)) {
4664: $startfilter=&unescape($startfilter);
4665: } else {
4666: $startfilter='.';
4667: }
4668: if (defined($endfilter)) {
4669: $endfilter=&unescape($endfilter);
4670: } else {
4671: $endfilter='.';
4672: }
4673: if (defined($rolesfilter)) {
4674: $rolesfilter=&unescape($rolesfilter);
4675: @roles = split(/\&/,$rolesfilter);
4676: }
4677:
4678: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4679: if ($hashref) {
4680: my $qresult = '';
4681: while (my ($key,$value) = each(%$hashref)) {
4682: my $match = 1;
4683: my ($end,$start) = split(/:/,&unescape($value));
4684: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
4685: unless (@roles < 1) {
4686: unless (grep/^\Q$trole\E$/,@roles) {
4687: $match = 0;
4688: next;
4689: }
4690: }
4691: unless ($startfilter eq '.' || !defined($startfilter)) {
4692: if ((defined($start)) && ($start >= $startfilter)) {
4693: $match = 0;
4694: next;
4695: }
4696: }
4697: unless ($endfilter eq '.' || !defined($endfilter)) {
4698: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
4699: $match = 0;
4700: next;
4701: }
4702: }
4703: if ($match == 1) {
4704: $qresult.=$key.'='.$value.'&';
4705: }
4706: }
4707: if (&untie_domain_hash($hashref)) {
4708: chop($qresult);
4709: &Reply($client, \$qresult, $userinput);
4710: } else {
4711: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4712: "while attempting domrolesdump\n", $userinput);
4713: }
4714: } else {
4715: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4716: "while attempting domrolesdump\n", $userinput);
4717: }
4718: return 1;
4719: }
4720:
4721: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4722:
4723:
4724: # Process the tmpput command I'm not sure what this does.. Seems to
4725: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4726: # where Id is the client's ip concatenated with a sequence number.
4727: # The file will contain some value that is passed in. Is this e.g.
4728: # a login token?
4729: #
4730: # Parameters:
4731: # $cmd - The command that got us dispatched.
4732: # $tail - The remainder of the request following $cmd:
4733: # In this case this will be the contents of the file.
4734: # $client - Socket connected to the client.
4735: # Returns:
4736: # 1 indicating processing can continue.
4737: # Side effects:
4738: # A file is created in the local filesystem.
4739: # A reply is sent to the client.
4740: sub tmp_put_handler {
4741: my ($cmd, $what, $client) = @_;
4742:
4743: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4744:
4745: my ($record,$context) = split(/:/,$what);
4746: if ($context ne '') {
4747: chomp($context);
4748: $context = &unescape($context);
4749: }
4750: my ($id,$store);
4751: $tmpsnum++;
4752: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
4753: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4754: } else {
4755: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4756: }
4757: $id=~s/\W/\_/g;
4758: $record=~s/\n//g;
4759: my $execdir=$perlvar{'lonDaemons'};
4760: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
4761: print $store $record;
4762: close $store;
4763: &Reply($client, \$id, $userinput);
4764: } else {
4765: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4766: "while attempting tmpput\n", $userinput);
4767: }
4768: return 1;
4769:
4770: }
4771: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
4772:
4773: # Processes the tmpget command. This command returns the contents
4774: # of a temporary resource file(?) created via tmpput.
4775: #
4776: # Paramters:
4777: # $cmd - Command that got us dispatched.
4778: # $id - Tail of the command, contain the id of the resource
4779: # we want to fetch.
4780: # $client - socket open on the client.
4781: # Return:
4782: # 1 - Inidcating processing can continue.
4783: # Side effects:
4784: # A reply is sent to the client.
4785: #
4786: sub tmp_get_handler {
4787: my ($cmd, $id, $client) = @_;
4788:
4789: my $userinput = "$cmd:$id";
4790:
4791:
4792: $id=~s/\W/\_/g;
4793: my $store;
4794: my $execdir=$perlvar{'lonDaemons'};
4795: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4796: my $reply=<$store>;
4797: &Reply( $client, \$reply, $userinput);
4798: close $store;
4799: } else {
4800: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4801: "while attempting tmpget\n", $userinput);
4802: }
4803:
4804: return 1;
4805: }
4806: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
4807:
4808: #
4809: # Process the tmpdel command. This command deletes a temp resource
4810: # created by the tmpput command.
4811: #
4812: # Parameters:
4813: # $cmd - Command that got us here.
4814: # $id - Id of the temporary resource created.
4815: # $client - socket open on the client process.
4816: #
4817: # Returns:
4818: # 1 - Indicating processing should continue.
4819: # Side Effects:
4820: # A file is deleted
4821: # A reply is sent to the client.
4822: sub tmp_del_handler {
4823: my ($cmd, $id, $client) = @_;
4824:
4825: my $userinput= "$cmd:$id";
4826:
4827: chomp($id);
4828: $id=~s/\W/\_/g;
4829: my $execdir=$perlvar{'lonDaemons'};
4830: if (unlink("$execdir/tmp/$id.tmp")) {
4831: &Reply($client, "ok\n", $userinput);
4832: } else {
4833: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4834: "while attempting tmpdel\n", $userinput);
4835: }
4836:
4837: return 1;
4838:
4839: }
4840: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
4841:
4842: #
4843: # Processes the setannounce command. This command
4844: # creates a file named announce.txt in the top directory of
4845: # the documentn root and sets its contents. The announce.txt file is
4846: # printed in its entirety at the LonCAPA login page. Note:
4847: # once the announcement.txt fileis created it cannot be deleted.
4848: # However, setting the contents of the file to empty removes the
4849: # announcement from the login page of loncapa so who cares.
4850: #
4851: # Parameters:
4852: # $cmd - The command that got us dispatched.
4853: # $announcement - The text of the announcement.
4854: # $client - Socket open on the client process.
4855: # Retunrns:
4856: # 1 - Indicating request processing should continue
4857: # Side Effects:
4858: # The file {DocRoot}/announcement.txt is created.
4859: # A reply is sent to $client.
4860: #
4861: sub set_announce_handler {
4862: my ($cmd, $announcement, $client) = @_;
4863:
4864: my $userinput = "$cmd:$announcement";
4865:
4866: chomp($announcement);
4867: $announcement=&unescape($announcement);
4868: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4869: '/announcement.txt')) {
4870: print $store $announcement;
4871: close $store;
4872: &Reply($client, "ok\n", $userinput);
4873: } else {
4874: &Failure($client, "error: ".($!+0)."\n", $userinput);
4875: }
4876:
4877: return 1;
4878: }
4879: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
4880:
4881: #
4882: # Return the version of the daemon. This can be used to determine
4883: # the compatibility of cross version installations or, alternatively to
4884: # simply know who's out of date and who isn't. Note that the version
4885: # is returned concatenated with the tail.
4886: # Parameters:
4887: # $cmd - the request that dispatched to us.
4888: # $tail - Tail of the request (client's version?).
4889: # $client - Socket open on the client.
4890: #Returns:
4891: # 1 - continue processing requests.
4892: # Side Effects:
4893: # Replies with version to $client.
4894: sub get_version_handler {
4895: my ($cmd, $tail, $client) = @_;
4896:
4897: my $userinput = $cmd.$tail;
4898:
4899: &Reply($client, &version($userinput)."\n", $userinput);
4900:
4901:
4902: return 1;
4903: }
4904: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
4905:
4906: # Set the current host and domain. This is used to support
4907: # multihomed systems. Each IP of the system, or even separate daemons
4908: # on the same IP can be treated as handling a separate lonCAPA virtual
4909: # machine. This command selects the virtual lonCAPA. The client always
4910: # knows the right one since it is lonc and it is selecting the domain/system
4911: # from the hosts.tab file.
4912: # Parameters:
4913: # $cmd - Command that dispatched us.
4914: # $tail - Tail of the command (domain/host requested).
4915: # $socket - Socket open on the client.
4916: #
4917: # Returns:
4918: # 1 - Indicates the program should continue to process requests.
4919: # Side-effects:
4920: # The default domain/system context is modified for this daemon.
4921: # a reply is sent to the client.
4922: #
4923: sub set_virtual_host_handler {
4924: my ($cmd, $tail, $socket) = @_;
4925:
4926: my $userinput ="$cmd:$tail";
4927:
4928: &Reply($client, &sethost($userinput)."\n", $userinput);
4929:
4930:
4931: return 1;
4932: }
4933: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
4934:
4935: # Process a request to exit:
4936: # - "bye" is sent to the client.
4937: # - The client socket is shutdown and closed.
4938: # - We indicate to the caller that we should exit.
4939: # Formal Parameters:
4940: # $cmd - The command that got us here.
4941: # $tail - Tail of the command (empty).
4942: # $client - Socket open on the tail.
4943: # Returns:
4944: # 0 - Indicating the program should exit!!
4945: #
4946: sub exit_handler {
4947: my ($cmd, $tail, $client) = @_;
4948:
4949: my $userinput = "$cmd:$tail";
4950:
4951: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4952: &Reply($client, "bye\n", $userinput);
4953: $client->shutdown(2); # shutdown the socket forcibly.
4954: $client->close();
4955:
4956: return 0;
4957: }
4958: ®ister_handler("exit", \&exit_handler, 0,1,1);
4959: ®ister_handler("init", \&exit_handler, 0,1,1);
4960: ®ister_handler("quit", \&exit_handler, 0,1,1);
4961:
4962: # Determine if auto-enrollment is enabled.
4963: # Note that the original had what I believe to be a defect.
4964: # The original returned 0 if the requestor was not a registerd client.
4965: # It should return "refused".
4966: # Formal Parameters:
4967: # $cmd - The command that invoked us.
4968: # $tail - The tail of the command (Extra command parameters.
4969: # $client - The socket open on the client that issued the request.
4970: # Returns:
4971: # 1 - Indicating processing should continue.
4972: #
4973: sub enrollment_enabled_handler {
4974: my ($cmd, $tail, $client) = @_;
4975: my $userinput = $cmd.":".$tail; # For logging purposes.
4976:
4977:
4978: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4979:
4980: my $outcome = &localenroll::run($cdom);
4981: &Reply($client, \$outcome, $userinput);
4982:
4983: return 1;
4984: }
4985: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4986:
4987: #
4988: # Validate an institutional code used for a LON-CAPA course.
4989: #
4990: # Formal Parameters:
4991: # $cmd - The command request that got us dispatched.
4992: # $tail - The tail of the command. In this case,
4993: # this is a colon separated set of words that will be split
4994: # into:
4995: # $dom - The domain for which the check of
4996: # institutional course code will occur.
4997: #
4998: # $instcode - The institutional code for the course
4999: # being requested, or validated for rights
5000: # to request.
5001: #
5002: # $owner - The course requestor (who will be the
5003: # course owner, in the form username:domain
5004: #
5005: # $client - Socket open on the client.
5006: # Returns:
5007: # 1 - Indicating processing should continue.
5008: #
5009: sub validate_instcode_handler {
5010: my ($cmd, $tail, $client) = @_;
5011: my $userinput = "$cmd:$tail";
5012: my ($dom,$instcode,$owner) = split(/:/, $tail);
5013: $instcode = &unescape($instcode);
5014: $owner = &unescape($owner);
5015: my ($outcome,$description,$credits) =
5016: &localenroll::validate_instcode($dom,$instcode,$owner);
5017: my $result = &escape($outcome).'&'.&escape($description).'&'.
5018: &escape($credits);
5019: &Reply($client, \$result, $userinput);
5020:
5021: return 1;
5022: }
5023: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5024:
5025: # Get the official sections for which auto-enrollment is possible.
5026: # Since the admin people won't know about 'unofficial sections'
5027: # we cannot auto-enroll on them.
5028: # Formal Parameters:
5029: # $cmd - The command request that got us dispatched here.
5030: # $tail - The remainder of the request. In our case this
5031: # will be split into:
5032: # $coursecode - The course name from the admin point of view.
5033: # $cdom - The course's domain(?).
5034: # $client - Socket open on the client.
5035: # Returns:
5036: # 1 - Indiciting processing should continue.
5037: #
5038: sub get_sections_handler {
5039: my ($cmd, $tail, $client) = @_;
5040: my $userinput = "$cmd:$tail";
5041:
5042: my ($coursecode, $cdom) = split(/:/, $tail);
5043: my @secs = &localenroll::get_sections($coursecode,$cdom);
5044: my $seclist = &escape(join(':',@secs));
5045:
5046: &Reply($client, \$seclist, $userinput);
5047:
5048:
5049: return 1;
5050: }
5051: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5052:
5053: # Validate the owner of a new course section.
5054: #
5055: # Formal Parameters:
5056: # $cmd - Command that got us dispatched.
5057: # $tail - the remainder of the command. For us this consists of a
5058: # colon separated string containing:
5059: # $inst - Course Id from the institutions point of view.
5060: # $owner - Proposed owner of the course.
5061: # $cdom - Domain of the course (from the institutions
5062: # point of view?)..
5063: # $client - Socket open on the client.
5064: #
5065: # Returns:
5066: # 1 - Processing should continue.
5067: #
5068: sub validate_course_owner_handler {
5069: my ($cmd, $tail, $client) = @_;
5070: my $userinput = "$cmd:$tail";
5071: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5072:
5073: $owner = &unescape($owner);
5074: $coowners = &unescape($coowners);
5075: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5076: &Reply($client, \$outcome, $userinput);
5077:
5078:
5079:
5080: return 1;
5081: }
5082: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5083:
5084: #
5085: # Validate a course section in the official schedule of classes
5086: # from the institutions point of view (part of autoenrollment).
5087: #
5088: # Formal Parameters:
5089: # $cmd - The command request that got us dispatched.
5090: # $tail - The tail of the command. In this case,
5091: # this is a colon separated set of words that will be split
5092: # into:
5093: # $inst_course_id - The course/section id from the
5094: # institutions point of view.
5095: # $cdom - The domain from the institutions
5096: # point of view.
5097: # $client - Socket open on the client.
5098: # Returns:
5099: # 1 - Indicating processing should continue.
5100: #
5101: sub validate_course_section_handler {
5102: my ($cmd, $tail, $client) = @_;
5103: my $userinput = "$cmd:$tail";
5104: my ($inst_course_id, $cdom) = split(/:/, $tail);
5105:
5106: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5107: &Reply($client, \$outcome, $userinput);
5108:
5109:
5110: return 1;
5111: }
5112: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5113:
5114: #
5115: # Validate course owner's access to enrollment data for specific class section.
5116: #
5117: #
5118: # Formal Parameters:
5119: # $cmd - The command request that got us dispatched.
5120: # $tail - The tail of the command. In this case this is a colon separated
5121: # set of words that will be split into:
5122: # $inst_class - Institutional code for the specific class section
5123: # $courseowner - The escaped username:domain of the course owner
5124: # $cdom - The domain of the course from the institution's
5125: # point of view.
5126: # $client - The socket open on the client.
5127: # Returns:
5128: # 1 - continue processing.
5129: #
5130:
5131: sub validate_class_access_handler {
5132: my ($cmd, $tail, $client) = @_;
5133: my $userinput = "$cmd:$tail";
5134: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5135: my $owners = &unescape($ownerlist);
5136: my $outcome;
5137: eval {
5138: local($SIG{__DIE__})='DEFAULT';
5139: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5140: };
5141: &Reply($client,\$outcome, $userinput);
5142:
5143: return 1;
5144: }
5145: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5146:
5147: #
5148: # Create a password for a new LON-CAPA user added by auto-enrollment.
5149: # Only used for case where authentication method for new user is localauth
5150: #
5151: # Formal Parameters:
5152: # $cmd - The command request that got us dispatched.
5153: # $tail - The tail of the command. In this case this is a colon separated
5154: # set of words that will be split into:
5155: # $authparam - An authentication parameter (localauth parameter).
5156: # $cdom - The domain of the course from the institution's
5157: # point of view.
5158: # $client - The socket open on the client.
5159: # Returns:
5160: # 1 - continue processing.
5161: #
5162: sub create_auto_enroll_password_handler {
5163: my ($cmd, $tail, $client) = @_;
5164: my $userinput = "$cmd:$tail";
5165:
5166: my ($authparam, $cdom) = split(/:/, $userinput);
5167:
5168: my ($create_passwd,$authchk);
5169: ($authparam,
5170: $create_passwd,
5171: $authchk) = &localenroll::create_password($authparam,$cdom);
5172:
5173: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5174: $userinput);
5175:
5176:
5177: return 1;
5178: }
5179: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5180: 0, 1, 0);
5181:
5182: # Retrieve and remove temporary files created by/during autoenrollment.
5183: #
5184: # Formal Parameters:
5185: # $cmd - The command that got us dispatched.
5186: # $tail - The tail of the command. In our case this is a colon
5187: # separated list that will be split into:
5188: # $filename - The name of the file to remove.
5189: # The filename is given as a path relative to
5190: # the LonCAPA temp file directory.
5191: # $client - Socket open on the client.
5192: #
5193: # Returns:
5194: # 1 - Continue processing.
5195: sub retrieve_auto_file_handler {
5196: my ($cmd, $tail, $client) = @_;
5197: my $userinput = "cmd:$tail";
5198:
5199: my ($filename) = split(/:/, $tail);
5200:
5201: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5202: if ( (-e $source) && ($filename ne '') ) {
5203: my $reply = '';
5204: if (open(my $fh,$source)) {
5205: while (<$fh>) {
5206: chomp($_);
5207: $_ =~ s/^\s+//g;
5208: $_ =~ s/\s+$//g;
5209: $reply .= $_;
5210: }
5211: close($fh);
5212: &Reply($client, &escape($reply)."\n", $userinput);
5213:
5214: # Does this have to be uncommented??!? (RF).
5215: #
5216: # unlink($source);
5217: } else {
5218: &Failure($client, "error\n", $userinput);
5219: }
5220: } else {
5221: &Failure($client, "error\n", $userinput);
5222: }
5223:
5224:
5225: return 1;
5226: }
5227: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5228:
5229: sub crsreq_checks_handler {
5230: my ($cmd, $tail, $client) = @_;
5231: my $userinput = "$cmd:$tail";
5232: my $dom = $tail;
5233: my $result;
5234: my @reqtypes = ('official','unofficial','community');
5235: eval {
5236: local($SIG{__DIE__})='DEFAULT';
5237: my %validations;
5238: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5239: \%validations);
5240: if ($response eq 'ok') {
5241: foreach my $key (keys(%validations)) {
5242: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5243: }
5244: $result =~ s/\&$//;
5245: } else {
5246: $result = 'error';
5247: }
5248: };
5249: if (!$@) {
5250: &Reply($client, \$result, $userinput);
5251: } else {
5252: &Failure($client,"unknown_cmd\n",$userinput);
5253: }
5254: return 1;
5255: }
5256: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5257:
5258: sub validate_crsreq_handler {
5259: my ($cmd, $tail, $client) = @_;
5260: my $userinput = "$cmd:$tail";
5261: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
5262: $instcode = &unescape($instcode);
5263: $owner = &unescape($owner);
5264: $crstype = &unescape($crstype);
5265: $inststatuslist = &unescape($inststatuslist);
5266: $instcode = &unescape($instcode);
5267: $instseclist = &unescape($instseclist);
5268: my $outcome;
5269: eval {
5270: local($SIG{__DIE__})='DEFAULT';
5271: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5272: $inststatuslist,$instcode,
5273: $instseclist);
5274: };
5275: if (!$@) {
5276: &Reply($client, \$outcome, $userinput);
5277: } else {
5278: &Failure($client,"unknown_cmd\n",$userinput);
5279: }
5280: return 1;
5281: }
5282: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5283:
5284: #
5285: # Read and retrieve institutional code format (for support form).
5286: # Formal Parameters:
5287: # $cmd - Command that dispatched us.
5288: # $tail - Tail of the command. In this case it conatins
5289: # the course domain and the coursename.
5290: # $client - Socket open on the client.
5291: # Returns:
5292: # 1 - Continue processing.
5293: #
5294: sub get_institutional_code_format_handler {
5295: my ($cmd, $tail, $client) = @_;
5296: my $userinput = "$cmd:$tail";
5297:
5298: my $reply;
5299: my($cdom,$course) = split(/:/,$tail);
5300: my @pairs = split/\&/,$course;
5301: my %instcodes = ();
5302: my %codes = ();
5303: my @codetitles = ();
5304: my %cat_titles = ();
5305: my %cat_order = ();
5306: foreach (@pairs) {
5307: my ($key,$value) = split/=/,$_;
5308: $instcodes{&unescape($key)} = &unescape($value);
5309: }
5310: my $formatreply = &localenroll::instcode_format($cdom,
5311: \%instcodes,
5312: \%codes,
5313: \@codetitles,
5314: \%cat_titles,
5315: \%cat_order);
5316: if ($formatreply eq 'ok') {
5317: my $codes_str = &Apache::lonnet::hash2str(%codes);
5318: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5319: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5320: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5321: &Reply($client,
5322: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5323: .$cat_order_str."\n",
5324: $userinput);
5325: } else {
5326: # this else branch added by RF since if not ok, lonc will
5327: # hang waiting on reply until timeout.
5328: #
5329: &Reply($client, "format_error\n", $userinput);
5330: }
5331:
5332: return 1;
5333: }
5334: ®ister_handler("autoinstcodeformat",
5335: \&get_institutional_code_format_handler,0,1,0);
5336:
5337: sub get_institutional_defaults_handler {
5338: my ($cmd, $tail, $client) = @_;
5339: my $userinput = "$cmd:$tail";
5340:
5341: my $dom = $tail;
5342: my %defaults_hash;
5343: my @code_order;
5344: my $outcome;
5345: eval {
5346: local($SIG{__DIE__})='DEFAULT';
5347: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5348: \@code_order);
5349: };
5350: if (!$@) {
5351: if ($outcome eq 'ok') {
5352: my $result='';
5353: while (my ($key,$value) = each(%defaults_hash)) {
5354: $result.=&escape($key).'='.&escape($value).'&';
5355: }
5356: $result .= 'code_order='.&escape(join('&',@code_order));
5357: &Reply($client,\$result,$userinput);
5358: } else {
5359: &Reply($client,"error\n", $userinput);
5360: }
5361: } else {
5362: &Failure($client,"unknown_cmd\n",$userinput);
5363: }
5364: }
5365: ®ister_handler("autoinstcodedefaults",
5366: \&get_institutional_defaults_handler,0,1,0);
5367:
5368: sub get_possible_instcodes_handler {
5369: my ($cmd, $tail, $client) = @_;
5370: my $userinput = "$cmd:$tail";
5371:
5372: my $reply;
5373: my $cdom = $tail;
5374: my (@codetitles,%cat_titles,%cat_order,@code_order);
5375: my $formatreply = &localenroll::possible_instcodes($cdom,
5376: \@codetitles,
5377: \%cat_titles,
5378: \%cat_order,
5379: \@code_order);
5380: if ($formatreply eq 'ok') {
5381: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5382: $result .= join('&',map {&escape($_);} (@code_order)).':';
5383: foreach my $key (keys(%cat_titles)) {
5384: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5385: }
5386: $result =~ s/\&$//;
5387: $result .= ':';
5388: foreach my $key (keys(%cat_order)) {
5389: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5390: }
5391: $result =~ s/\&$//;
5392: &Reply($client,\$result,$userinput);
5393: } else {
5394: &Reply($client, "format_error\n", $userinput);
5395: }
5396: return 1;
5397: }
5398: ®ister_handler("autopossibleinstcodes",
5399: \&get_possible_instcodes_handler,0,1,0);
5400:
5401: sub get_institutional_user_rules {
5402: my ($cmd, $tail, $client) = @_;
5403: my $userinput = "$cmd:$tail";
5404: my $dom = &unescape($tail);
5405: my (%rules_hash,@rules_order);
5406: my $outcome;
5407: eval {
5408: local($SIG{__DIE__})='DEFAULT';
5409: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5410: };
5411: if (!$@) {
5412: if ($outcome eq 'ok') {
5413: my $result;
5414: foreach my $key (keys(%rules_hash)) {
5415: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5416: }
5417: $result =~ s/\&$//;
5418: $result .= ':';
5419: if (@rules_order > 0) {
5420: foreach my $item (@rules_order) {
5421: $result .= &escape($item).'&';
5422: }
5423: }
5424: $result =~ s/\&$//;
5425: &Reply($client,\$result,$userinput);
5426: } else {
5427: &Reply($client,"error\n", $userinput);
5428: }
5429: } else {
5430: &Failure($client,"unknown_cmd\n",$userinput);
5431: }
5432: }
5433: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5434:
5435: sub get_institutional_id_rules {
5436: my ($cmd, $tail, $client) = @_;
5437: my $userinput = "$cmd:$tail";
5438: my $dom = &unescape($tail);
5439: my (%rules_hash,@rules_order);
5440: my $outcome;
5441: eval {
5442: local($SIG{__DIE__})='DEFAULT';
5443: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5444: };
5445: if (!$@) {
5446: if ($outcome eq 'ok') {
5447: my $result;
5448: foreach my $key (keys(%rules_hash)) {
5449: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5450: }
5451: $result =~ s/\&$//;
5452: $result .= ':';
5453: if (@rules_order > 0) {
5454: foreach my $item (@rules_order) {
5455: $result .= &escape($item).'&';
5456: }
5457: }
5458: $result =~ s/\&$//;
5459: &Reply($client,\$result,$userinput);
5460: } else {
5461: &Reply($client,"error\n", $userinput);
5462: }
5463: } else {
5464: &Failure($client,"unknown_cmd\n",$userinput);
5465: }
5466: }
5467: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
5468:
5469: sub get_institutional_selfcreate_rules {
5470: my ($cmd, $tail, $client) = @_;
5471: my $userinput = "$cmd:$tail";
5472: my $dom = &unescape($tail);
5473: my (%rules_hash,@rules_order);
5474: my $outcome;
5475: eval {
5476: local($SIG{__DIE__})='DEFAULT';
5477: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
5478: };
5479: if (!$@) {
5480: if ($outcome eq 'ok') {
5481: my $result;
5482: foreach my $key (keys(%rules_hash)) {
5483: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5484: }
5485: $result =~ s/\&$//;
5486: $result .= ':';
5487: if (@rules_order > 0) {
5488: foreach my $item (@rules_order) {
5489: $result .= &escape($item).'&';
5490: }
5491: }
5492: $result =~ s/\&$//;
5493: &Reply($client,\$result,$userinput);
5494: } else {
5495: &Reply($client,"error\n", $userinput);
5496: }
5497: } else {
5498: &Failure($client,"unknown_cmd\n",$userinput);
5499: }
5500: }
5501: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
5502:
5503:
5504: sub institutional_username_check {
5505: my ($cmd, $tail, $client) = @_;
5506: my $userinput = "$cmd:$tail";
5507: my %rulecheck;
5508: my $outcome;
5509: my ($udom,$uname,@rules) = split(/:/,$tail);
5510: $udom = &unescape($udom);
5511: $uname = &unescape($uname);
5512: @rules = map {&unescape($_);} (@rules);
5513: eval {
5514: local($SIG{__DIE__})='DEFAULT';
5515: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
5516: };
5517: if (!$@) {
5518: if ($outcome eq 'ok') {
5519: my $result='';
5520: foreach my $key (keys(%rulecheck)) {
5521: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5522: }
5523: &Reply($client,\$result,$userinput);
5524: } else {
5525: &Reply($client,"error\n", $userinput);
5526: }
5527: } else {
5528: &Failure($client,"unknown_cmd\n",$userinput);
5529: }
5530: }
5531: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
5532:
5533: sub institutional_id_check {
5534: my ($cmd, $tail, $client) = @_;
5535: my $userinput = "$cmd:$tail";
5536: my %rulecheck;
5537: my $outcome;
5538: my ($udom,$id,@rules) = split(/:/,$tail);
5539: $udom = &unescape($udom);
5540: $id = &unescape($id);
5541: @rules = map {&unescape($_);} (@rules);
5542: eval {
5543: local($SIG{__DIE__})='DEFAULT';
5544: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
5545: };
5546: if (!$@) {
5547: if ($outcome eq 'ok') {
5548: my $result='';
5549: foreach my $key (keys(%rulecheck)) {
5550: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5551: }
5552: &Reply($client,\$result,$userinput);
5553: } else {
5554: &Reply($client,"error\n", $userinput);
5555: }
5556: } else {
5557: &Failure($client,"unknown_cmd\n",$userinput);
5558: }
5559: }
5560: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
5561:
5562: sub institutional_selfcreate_check {
5563: my ($cmd, $tail, $client) = @_;
5564: my $userinput = "$cmd:$tail";
5565: my %rulecheck;
5566: my $outcome;
5567: my ($udom,$email,@rules) = split(/:/,$tail);
5568: $udom = &unescape($udom);
5569: $email = &unescape($email);
5570: @rules = map {&unescape($_);} (@rules);
5571: eval {
5572: local($SIG{__DIE__})='DEFAULT';
5573: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
5574: };
5575: if (!$@) {
5576: if ($outcome eq 'ok') {
5577: my $result='';
5578: foreach my $key (keys(%rulecheck)) {
5579: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5580: }
5581: &Reply($client,\$result,$userinput);
5582: } else {
5583: &Reply($client,"error\n", $userinput);
5584: }
5585: } else {
5586: &Failure($client,"unknown_cmd\n",$userinput);
5587: }
5588: }
5589: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
5590:
5591: # Get domain specific conditions for import of student photographs to a course
5592: #
5593: # Retrieves information from photo_permission subroutine in localenroll.
5594: # Returns outcome (ok) if no processing errors, and whether course owner is
5595: # required to accept conditions of use (yes/no).
5596: #
5597: #
5598: sub photo_permission_handler {
5599: my ($cmd, $tail, $client) = @_;
5600: my $userinput = "$cmd:$tail";
5601: my $cdom = $tail;
5602: my ($perm_reqd,$conditions);
5603: my $outcome;
5604: eval {
5605: local($SIG{__DIE__})='DEFAULT';
5606: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
5607: \$conditions);
5608: };
5609: if (!$@) {
5610: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
5611: $userinput);
5612: } else {
5613: &Failure($client,"unknown_cmd\n",$userinput);
5614: }
5615: return 1;
5616: }
5617: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
5618:
5619: #
5620: # Checks if student photo is available for a user in the domain, in the user's
5621: # directory (in /userfiles/internal/studentphoto.jpg).
5622: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
5623: # the student's photo.
5624:
5625: sub photo_check_handler {
5626: my ($cmd, $tail, $client) = @_;
5627: my $userinput = "$cmd:$tail";
5628: my ($udom,$uname,$pid) = split(/:/,$tail);
5629: $udom = &unescape($udom);
5630: $uname = &unescape($uname);
5631: $pid = &unescape($pid);
5632: my $path=&propath($udom,$uname).'/userfiles/internal/';
5633: if (!-e $path) {
5634: &mkpath($path);
5635: }
5636: my $response;
5637: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
5638: $result .= ':'.$response;
5639: &Reply($client, &escape($result)."\n",$userinput);
5640: return 1;
5641: }
5642: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
5643:
5644: #
5645: # Retrieve information from localenroll about whether to provide a button
5646: # for users who have enbled import of student photos to initiate an
5647: # update of photo files for registered students. Also include
5648: # comment to display alongside button.
5649:
5650: sub photo_choice_handler {
5651: my ($cmd, $tail, $client) = @_;
5652: my $userinput = "$cmd:$tail";
5653: my $cdom = &unescape($tail);
5654: my ($update,$comment);
5655: eval {
5656: local($SIG{__DIE__})='DEFAULT';
5657: ($update,$comment) = &localenroll::manager_photo_update($cdom);
5658: };
5659: if (!$@) {
5660: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
5661: } else {
5662: &Failure($client,"unknown_cmd\n",$userinput);
5663: }
5664: return 1;
5665: }
5666: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
5667:
5668: #
5669: # Gets a student's photo to exist (in the correct image type) in the user's
5670: # directory.
5671: # Formal Parameters:
5672: # $cmd - The command request that got us dispatched.
5673: # $tail - A colon separated set of words that will be split into:
5674: # $domain - student's domain
5675: # $uname - student username
5676: # $type - image type desired
5677: # $client - The socket open on the client.
5678: # Returns:
5679: # 1 - continue processing.
5680:
5681: sub student_photo_handler {
5682: my ($cmd, $tail, $client) = @_;
5683: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
5684:
5685: my $path=&propath($domain,$uname). '/userfiles/internal/';
5686: my $filename = 'studentphoto.'.$ext;
5687: if ($type eq 'thumbnail') {
5688: $filename = 'studentphoto_tn.'.$ext;
5689: }
5690: if (-e $path.$filename) {
5691: &Reply($client,"ok\n","$cmd:$tail");
5692: return 1;
5693: }
5694: &mkpath($path);
5695: my $file;
5696: if ($type eq 'thumbnail') {
5697: eval {
5698: local($SIG{__DIE__})='DEFAULT';
5699: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
5700: };
5701: } else {
5702: $file=&localstudentphoto::fetch($domain,$uname);
5703: }
5704: if (!$file) {
5705: &Failure($client,"unavailable\n","$cmd:$tail");
5706: return 1;
5707: }
5708: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
5709: if (-e $path.$filename) {
5710: &Reply($client,"ok\n","$cmd:$tail");
5711: return 1;
5712: }
5713: &Failure($client,"unable_to_convert\n","$cmd:$tail");
5714: return 1;
5715: }
5716: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
5717:
5718: sub inst_usertypes_handler {
5719: my ($cmd, $domain, $client) = @_;
5720: my $res;
5721: my $userinput = $cmd.":".$domain; # For logging purposes.
5722: my (%typeshash,@order,$result);
5723: eval {
5724: local($SIG{__DIE__})='DEFAULT';
5725: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
5726: };
5727: if ($result eq 'ok') {
5728: if (keys(%typeshash) > 0) {
5729: foreach my $key (keys(%typeshash)) {
5730: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
5731: }
5732: }
5733: $res=~s/\&$//;
5734: $res .= ':';
5735: if (@order > 0) {
5736: foreach my $item (@order) {
5737: $res .= &escape($item).'&';
5738: }
5739: }
5740: $res=~s/\&$//;
5741: }
5742: &Reply($client, \$res, $userinput);
5743: return 1;
5744: }
5745: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
5746:
5747: # mkpath makes all directories for a file, expects an absolute path with a
5748: # file or a trailing / if just a dir is passed
5749: # returns 1 on success 0 on failure
5750: sub mkpath {
5751: my ($file)=@_;
5752: my @parts=split(/\//,$file,-1);
5753: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
5754: for (my $i=3;$i<= ($#parts-1);$i++) {
5755: $now.='/'.$parts[$i];
5756: if (!-e $now) {
5757: if (!mkdir($now,0770)) { return 0; }
5758: }
5759: }
5760: return 1;
5761: }
5762:
5763: #---------------------------------------------------------------
5764: #
5765: # Getting, decoding and dispatching requests:
5766: #
5767: #
5768: # Get a Request:
5769: # Gets a Request message from the client. The transaction
5770: # is defined as a 'line' of text. We remove the new line
5771: # from the text line.
5772: #
5773: sub get_request {
5774: my $input = <$client>;
5775: chomp($input);
5776:
5777: &Debug("get_request: Request = $input\n");
5778:
5779: &status('Processing '.$clientname.':'.$input);
5780:
5781: return $input;
5782: }
5783: #---------------------------------------------------------------
5784: #
5785: # Process a request. This sub should shrink as each action
5786: # gets farmed out into a separat sub that is registered
5787: # with the dispatch hash.
5788: #
5789: # Parameters:
5790: # user_input - The request received from the client (lonc).
5791: # Returns:
5792: # true to keep processing, false if caller should exit.
5793: #
5794: sub process_request {
5795: my ($userinput) = @_; # Easier for now to break style than to
5796: # fix all the userinput -> user_input.
5797: my $wasenc = 0; # True if request was encrypted.
5798: # ------------------------------------------------------------ See if encrypted
5799: # for command
5800: # sethost:<server>
5801: # <command>:<args>
5802: # we just send it to the processor
5803: # for
5804: # sethost:<server>:<command>:<args>
5805: # we do the implict set host and then do the command
5806: if ($userinput =~ /^sethost:/) {
5807: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
5808: if (defined($userinput)) {
5809: &sethost("$cmd:$newid");
5810: } else {
5811: $userinput = "$cmd:$newid";
5812: }
5813: }
5814:
5815: if ($userinput =~ /^enc/) {
5816: $userinput = decipher($userinput);
5817: $wasenc=1;
5818: if(!$userinput) { # Cipher not defined.
5819: &Failure($client, "error: Encrypted data without negotated key\n");
5820: return 0;
5821: }
5822: }
5823: Debug("process_request: $userinput\n");
5824:
5825: #
5826: # The 'correct way' to add a command to lond is now to
5827: # write a sub to execute it and Add it to the command dispatch
5828: # hash via a call to register_handler.. The comments to that
5829: # sub should give you enough to go on to show how to do this
5830: # along with the examples that are building up as this code
5831: # is getting refactored. Until all branches of the
5832: # if/elseif monster below have been factored out into
5833: # separate procesor subs, if the dispatch hash is missing
5834: # the command keyword, we will fall through to the remainder
5835: # of the if/else chain below in order to keep this thing in
5836: # working order throughout the transmogrification.
5837:
5838: my ($command, $tail) = split(/:/, $userinput, 2);
5839: chomp($command);
5840: chomp($tail);
5841: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
5842: $command =~ s/(\r)//; # And this too for parameterless commands.
5843: if(!$tail) {
5844: $tail =""; # defined but blank.
5845: }
5846:
5847: &Debug("Command received: $command, encoded = $wasenc");
5848:
5849: if(defined $Dispatcher{$command}) {
5850:
5851: my $dispatch_info = $Dispatcher{$command};
5852: my $handler = $$dispatch_info[0];
5853: my $need_encode = $$dispatch_info[1];
5854: my $client_types = $$dispatch_info[2];
5855: Debug("Matched dispatch hash: mustencode: $need_encode "
5856: ."ClientType $client_types");
5857:
5858: # Validate the request:
5859:
5860: my $ok = 1;
5861: my $requesterprivs = 0;
5862: if(&isClient()) {
5863: $requesterprivs |= $CLIENT_OK;
5864: }
5865: if(&isManager()) {
5866: $requesterprivs |= $MANAGER_OK;
5867: }
5868: if($need_encode && (!$wasenc)) {
5869: Debug("Must encode but wasn't: $need_encode $wasenc");
5870: $ok = 0;
5871: }
5872: if(($client_types & $requesterprivs) == 0) {
5873: Debug("Client not privileged to do this operation");
5874: $ok = 0;
5875: }
5876:
5877: if($ok) {
5878: Debug("Dispatching to handler $command $tail");
5879: my $keep_going = &$handler($command, $tail, $client);
5880: return $keep_going;
5881: } else {
5882: Debug("Refusing to dispatch because client did not match requirements");
5883: Failure($client, "refused\n", $userinput);
5884: return 1;
5885: }
5886:
5887: }
5888:
5889: print $client "unknown_cmd\n";
5890: # -------------------------------------------------------------------- complete
5891: Debug("process_request - returning 1");
5892: return 1;
5893: }
5894: #
5895: # Decipher encoded traffic
5896: # Parameters:
5897: # input - Encoded data.
5898: # Returns:
5899: # Decoded data or undef if encryption key was not yet negotiated.
5900: # Implicit input:
5901: # cipher - This global holds the negotiated encryption key.
5902: #
5903: sub decipher {
5904: my ($input) = @_;
5905: my $output = '';
5906:
5907:
5908: if($cipher) {
5909: my($enc, $enclength, $encinput) = split(/:/, $input);
5910: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5911: $output .=
5912: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5913: }
5914: return substr($output, 0, $enclength);
5915: } else {
5916: return undef;
5917: }
5918: }
5919:
5920: #
5921: # Register a command processor. This function is invoked to register a sub
5922: # to process a request. Once registered, the ProcessRequest sub can automatically
5923: # dispatch requests to an appropriate sub, and do the top level validity checking
5924: # as well:
5925: # - Is the keyword recognized.
5926: # - Is the proper client type attempting the request.
5927: # - Is the request encrypted if it has to be.
5928: # Parameters:
5929: # $request_name - Name of the request being registered.
5930: # This is the command request that will match
5931: # against the hash keywords to lookup the information
5932: # associated with the dispatch information.
5933: # $procedure - Reference to a sub to call to process the request.
5934: # All subs get called as follows:
5935: # Procedure($cmd, $tail, $replyfd, $key)
5936: # $cmd - the actual keyword that invoked us.
5937: # $tail - the tail of the request that invoked us.
5938: # $replyfd- File descriptor connected to the client
5939: # $must_encode - True if the request must be encoded to be good.
5940: # $client_ok - True if it's ok for a client to request this.
5941: # $manager_ok - True if it's ok for a manager to request this.
5942: # Side effects:
5943: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5944: # - On failure, the program will die as it's a bad internal bug to try to
5945: # register a duplicate command handler.
5946: #
5947: sub register_handler {
5948: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
5949:
5950: # Don't allow duplication#
5951:
5952: if (defined $Dispatcher{$request_name}) {
5953: die "Attempting to define a duplicate request handler for $request_name\n";
5954: }
5955: # Build the client type mask:
5956:
5957: my $client_type_mask = 0;
5958: if($client_ok) {
5959: $client_type_mask |= $CLIENT_OK;
5960: }
5961: if($manager_ok) {
5962: $client_type_mask |= $MANAGER_OK;
5963: }
5964:
5965: # Enter the hash:
5966:
5967: my @entry = ($procedure, $must_encode, $client_type_mask);
5968:
5969: $Dispatcher{$request_name} = \@entry;
5970:
5971: }
5972:
5973:
5974: #------------------------------------------------------------------
5975:
5976:
5977:
5978:
5979: #
5980: # Convert an error return code from lcpasswd to a string value.
5981: #
5982: sub lcpasswdstrerror {
5983: my $ErrorCode = shift;
5984: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
5985: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5986: } else {
5987: return $passwderrors[$ErrorCode];
5988: }
5989: }
5990:
5991: # grabs exception and records it to log before exiting
5992: sub catchexception {
5993: my ($error)=@_;
5994: $SIG{'QUIT'}='DEFAULT';
5995: $SIG{__DIE__}='DEFAULT';
5996: &status("Catching exception");
5997: &logthis("<font color='red'>CRITICAL: "
5998: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
5999: ."a crash with this error msg->[$error]</font>");
6000: &logthis('Famous last words: '.$status.' - '.$lastlog);
6001: if ($client) { print $client "error: $error\n"; }
6002: $server->close();
6003: die($error);
6004: }
6005: sub timeout {
6006: &status("Handling Timeout");
6007: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
6008: &catchexception('Timeout');
6009: }
6010: # -------------------------------- Set signal handlers to record abnormal exits
6011:
6012:
6013: $SIG{'QUIT'}=\&catchexception;
6014: $SIG{__DIE__}=\&catchexception;
6015:
6016: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
6017: &status("Read loncapa.conf and loncapa_apache.conf");
6018: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
6019: %perlvar=%{$perlvarref};
6020: undef $perlvarref;
6021:
6022: # ----------------------------- Make sure this process is running from user=www
6023: my $wwwid=getpwnam('www');
6024: if ($wwwid!=$<) {
6025: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6026: my $subj="LON: $currenthostid User ID mismatch";
6027: system("echo 'User ID mismatch. lond must be run as user www.' |\
6028: mailto $emailto -s '$subj' > /dev/null");
6029: exit 1;
6030: }
6031:
6032: # --------------------------------------------- Check if other instance running
6033:
6034: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6035:
6036: if (-e $pidfile) {
6037: my $lfh=IO::File->new("$pidfile");
6038: my $pide=<$lfh>;
6039: chomp($pide);
6040: if (kill 0 => $pide) { die "already running"; }
6041: }
6042:
6043: # ------------------------------------------------------------- Read hosts file
6044:
6045:
6046:
6047: # establish SERVER socket, bind and listen.
6048: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6049: Type => SOCK_STREAM,
6050: Proto => 'tcp',
6051: ReuseAddr => 1,
6052: Listen => 10 )
6053: or die "making socket: $@\n";
6054:
6055: # --------------------------------------------------------- Do global variables
6056:
6057: # global variables
6058:
6059: my %children = (); # keys are current child process IDs
6060:
6061: sub REAPER { # takes care of dead children
6062: $SIG{CHLD} = \&REAPER;
6063: &status("Handling child death");
6064: my $pid;
6065: do {
6066: $pid = waitpid(-1,&WNOHANG());
6067: if (defined($children{$pid})) {
6068: &logthis("Child $pid died");
6069: delete($children{$pid});
6070: } elsif ($pid > 0) {
6071: &logthis("Unknown Child $pid died");
6072: }
6073: } while ( $pid > 0 );
6074: foreach my $child (keys(%children)) {
6075: $pid = waitpid($child,&WNOHANG());
6076: if ($pid > 0) {
6077: &logthis("Child $child - $pid looks like we missed it's death");
6078: delete($children{$pid});
6079: }
6080: }
6081: &status("Finished Handling child death");
6082: }
6083:
6084: sub HUNTSMAN { # signal handler for SIGINT
6085: &status("Killing children (INT)");
6086: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6087: kill 'INT' => keys %children;
6088: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6089: my $execdir=$perlvar{'lonDaemons'};
6090: unlink("$execdir/logs/lond.pid");
6091: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6092: &status("Done killing children");
6093: exit; # clean up with dignity
6094: }
6095:
6096: sub HUPSMAN { # signal handler for SIGHUP
6097: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6098: &status("Killing children for restart (HUP)");
6099: kill 'INT' => keys %children;
6100: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6101: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6102: my $execdir=$perlvar{'lonDaemons'};
6103: unlink("$execdir/logs/lond.pid");
6104: &status("Restarting self (HUP)");
6105: exec("$execdir/lond"); # here we go again
6106: }
6107:
6108: #
6109: # Reload the Apache daemon's state.
6110: # This is done by invoking /home/httpd/perl/apachereload
6111: # a setuid perl script that can be root for us to do this job.
6112: #
6113: sub ReloadApache {
6114: # --------------------------- Handle case of another apachereload process (locking)
6115: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6116: my $execdir = $perlvar{'lonDaemons'};
6117: my $script = $execdir."/apachereload";
6118: system($script);
6119: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6120: }
6121: }
6122:
6123: #
6124: # Called in response to a USR2 signal.
6125: # - Reread hosts.tab
6126: # - All children connected to hosts that were removed from hosts.tab
6127: # are killed via SIGINT
6128: # - All children connected to previously existing hosts are sent SIGUSR1
6129: # - Our internal hosts hash is updated to reflect the new contents of
6130: # hosts.tab causing connections from hosts added to hosts.tab to
6131: # now be honored.
6132: #
6133: sub UpdateHosts {
6134: &status("Reload hosts.tab");
6135: logthis('<font color="blue"> Updating connections </font>');
6136: #
6137: # The %children hash has the set of IP's we currently have children
6138: # on. These need to be matched against records in the hosts.tab
6139: # Any ip's no longer in the table get killed off they correspond to
6140: # either dropped or changed hosts. Note that the re-read of the table
6141: # will take care of new and changed hosts as connections come into being.
6142:
6143: &Apache::lonnet::reset_hosts_info();
6144:
6145: foreach my $child (keys(%children)) {
6146: my $childip = $children{$child};
6147: if ($childip ne '127.0.0.1'
6148: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
6149: logthis('<font color="blue"> UpdateHosts killing child '
6150: ." $child for ip $childip </font>");
6151: kill('INT', $child);
6152: } else {
6153: logthis('<font color="green"> keeping child for ip '
6154: ." $childip (pid=$child) </font>");
6155: }
6156: }
6157: ReloadApache;
6158: &status("Finished reloading hosts.tab");
6159: }
6160:
6161:
6162: sub checkchildren {
6163: &status("Checking on the children (sending signals)");
6164: &initnewstatus();
6165: &logstatus();
6166: &logthis('Going to check on the children');
6167: my $docdir=$perlvar{'lonDocRoot'};
6168: foreach (sort keys %children) {
6169: #sleep 1;
6170: unless (kill 'USR1' => $_) {
6171: &logthis ('Child '.$_.' is dead');
6172: &logstatus($$.' is dead');
6173: delete($children{$_});
6174: }
6175: }
6176: sleep 5;
6177: $SIG{ALRM} = sub { Debug("timeout");
6178: die "timeout"; };
6179: $SIG{__DIE__} = 'DEFAULT';
6180: &status("Checking on the children (waiting for reports)");
6181: foreach (sort keys %children) {
6182: unless (-e "$docdir/lon-status/londchld/$_.txt") {
6183: eval {
6184: alarm(300);
6185: &logthis('Child '.$_.' did not respond');
6186: kill 9 => $_;
6187: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6188: #$subj="LON: $currenthostid killed lond process $_";
6189: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6190: #$execdir=$perlvar{'lonDaemons'};
6191: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
6192: delete($children{$_});
6193: alarm(0);
6194: }
6195: }
6196: }
6197: $SIG{ALRM} = 'DEFAULT';
6198: $SIG{__DIE__} = \&catchexception;
6199: &status("Finished checking children");
6200: &logthis('Finished Checking children');
6201: }
6202:
6203: # --------------------------------------------------------------------- Logging
6204:
6205: sub logthis {
6206: my $message=shift;
6207: my $execdir=$perlvar{'lonDaemons'};
6208: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6209: my $now=time;
6210: my $local=localtime($now);
6211: $lastlog=$local.': '.$message;
6212: print $fh "$local ($$): $message\n";
6213: }
6214:
6215: # ------------------------- Conditional log if $DEBUG true.
6216: sub Debug {
6217: my $message = shift;
6218: if($DEBUG) {
6219: &logthis($message);
6220: }
6221: }
6222:
6223: #
6224: # Sub to do replies to client.. this gives a hook for some
6225: # debug tracing too:
6226: # Parameters:
6227: # fd - File open on client.
6228: # reply - Text to send to client.
6229: # request - Original request from client.
6230: #
6231: sub Reply {
6232: my ($fd, $reply, $request) = @_;
6233: if (ref($reply)) {
6234: print $fd $$reply;
6235: print $fd "\n";
6236: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6237: } else {
6238: print $fd $reply;
6239: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6240: }
6241: $Transactions++;
6242: }
6243:
6244:
6245: #
6246: # Sub to report a failure.
6247: # This function:
6248: # - Increments the failure statistic counters.
6249: # - Invokes Reply to send the error message to the client.
6250: # Parameters:
6251: # fd - File descriptor open on the client
6252: # reply - Reply text to emit.
6253: # request - The original request message (used by Reply
6254: # to debug if that's enabled.
6255: # Implicit outputs:
6256: # $Failures- The number of failures is incremented.
6257: # Reply (invoked here) sends a message to the
6258: # client:
6259: #
6260: sub Failure {
6261: my $fd = shift;
6262: my $reply = shift;
6263: my $request = shift;
6264:
6265: $Failures++;
6266: Reply($fd, $reply, $request); # That's simple eh?
6267: }
6268: # ------------------------------------------------------------------ Log status
6269:
6270: sub logstatus {
6271: &status("Doing logging");
6272: my $docdir=$perlvar{'lonDocRoot'};
6273: {
6274: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6275: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6276: $fh->close();
6277: }
6278: &status("Finished $$.txt");
6279: {
6280: open(LOG,">>$docdir/lon-status/londstatus.txt");
6281: flock(LOG,LOCK_EX);
6282: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6283: .$status."\t".$lastlog."\t $keymode\n";
6284: flock(LOG,LOCK_UN);
6285: close(LOG);
6286: }
6287: &status("Finished logging");
6288: }
6289:
6290: sub initnewstatus {
6291: my $docdir=$perlvar{'lonDocRoot'};
6292: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6293: my $now=time();
6294: my $local=localtime($now);
6295: print $fh "LOND status $local - parent $$\n\n";
6296: opendir(DIR,"$docdir/lon-status/londchld");
6297: while (my $filename=readdir(DIR)) {
6298: unlink("$docdir/lon-status/londchld/$filename");
6299: }
6300: closedir(DIR);
6301: }
6302:
6303: # -------------------------------------------------------------- Status setting
6304:
6305: sub status {
6306: my $what=shift;
6307: my $now=time;
6308: my $local=localtime($now);
6309: $status=$local.': '.$what;
6310: $0='lond: '.$what.' '.$local;
6311: }
6312:
6313: # -------------------------------------------------------------- Talk to lonsql
6314:
6315: sub sql_reply {
6316: my ($cmd)=@_;
6317: my $answer=&sub_sql_reply($cmd);
6318: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6319: return $answer;
6320: }
6321:
6322: sub sub_sql_reply {
6323: my ($cmd)=@_;
6324: my $unixsock="mysqlsock";
6325: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6326: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6327: Type => SOCK_STREAM,
6328: Timeout => 10)
6329: or return "con_lost";
6330: print $sclient "$cmd:$currentdomainid\n";
6331: my $answer=<$sclient>;
6332: chomp($answer);
6333: if (!$answer) { $answer="con_lost"; }
6334: return $answer;
6335: }
6336:
6337: # --------------------------------------- Is this the home server of an author?
6338:
6339: sub ishome {
6340: my $author=shift;
6341: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6342: my ($udom,$uname)=split(/\//,$author);
6343: my $proname=propath($udom,$uname);
6344: if (-e $proname) {
6345: return 'owner';
6346: } else {
6347: return 'not_owner';
6348: }
6349: }
6350:
6351: # ======================================================= Continue main program
6352: # ---------------------------------------------------- Fork once and dissociate
6353:
6354: my $fpid=fork;
6355: exit if $fpid;
6356: die "Couldn't fork: $!" unless defined ($fpid);
6357:
6358: POSIX::setsid() or die "Can't start new session: $!";
6359:
6360: # ------------------------------------------------------- Write our PID on disk
6361:
6362: my $execdir=$perlvar{'lonDaemons'};
6363: open (PIDSAVE,">$execdir/logs/lond.pid");
6364: print PIDSAVE "$$\n";
6365: close(PIDSAVE);
6366: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
6367: &status('Starting');
6368:
6369:
6370:
6371: # ----------------------------------------------------- Install signal handlers
6372:
6373:
6374: $SIG{CHLD} = \&REAPER;
6375: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6376: $SIG{HUP} = \&HUPSMAN;
6377: $SIG{USR1} = \&checkchildren;
6378: $SIG{USR2} = \&UpdateHosts;
6379:
6380: # Read the host hashes:
6381: &Apache::lonnet::load_hosts_tab();
6382: my %iphost = &Apache::lonnet::get_iphost(1);
6383:
6384: $dist=`$perlvar{'lonDaemons'}/distprobe`;
6385:
6386: my $arch = `uname -i`;
6387: chomp($arch);
6388: if ($arch eq 'unknown') {
6389: $arch = `uname -m`;
6390: chomp($arch);
6391: }
6392:
6393: # --------------------------------------------------------------
6394: # Accept connections. When a connection comes in, it is validated
6395: # and if good, a child process is created to process transactions
6396: # along the connection.
6397:
6398: while (1) {
6399: &status('Starting accept');
6400: $client = $server->accept() or next;
6401: &status('Accepted '.$client.' off to spawn');
6402: make_new_child($client);
6403: &status('Finished spawning');
6404: }
6405:
6406: sub make_new_child {
6407: my $pid;
6408: # my $cipher; # Now global
6409: my $sigset;
6410:
6411: $client = shift;
6412: &status('Starting new child '.$client);
6413: &logthis('<font color="green"> Attempting to start child ('.$client.
6414: ")</font>");
6415: # block signal for fork
6416: $sigset = POSIX::SigSet->new(SIGINT);
6417: sigprocmask(SIG_BLOCK, $sigset)
6418: or die "Can't block SIGINT for fork: $!\n";
6419:
6420: die "fork: $!" unless defined ($pid = fork);
6421:
6422: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6423: # connection liveness.
6424:
6425: #
6426: # Figure out who we're talking to so we can record the peer in
6427: # the pid hash.
6428: #
6429: my $caller = getpeername($client);
6430: my ($port,$iaddr);
6431: if (defined($caller) && length($caller) > 0) {
6432: ($port,$iaddr)=unpack_sockaddr_in($caller);
6433: } else {
6434: &logthis("Unable to determine who caller was, getpeername returned nothing");
6435: }
6436: if (defined($iaddr)) {
6437: $clientip = inet_ntoa($iaddr);
6438: Debug("Connected with $clientip");
6439: } else {
6440: &logthis("Unable to determine clientip");
6441: $clientip='Unavailable';
6442: }
6443:
6444: if ($pid) {
6445: # Parent records the child's birth and returns.
6446: sigprocmask(SIG_UNBLOCK, $sigset)
6447: or die "Can't unblock SIGINT for fork: $!\n";
6448: $children{$pid} = $clientip;
6449: &status('Started child '.$pid);
6450: close($client);
6451: return;
6452: } else {
6453: # Child can *not* return from this subroutine.
6454: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
6455: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
6456: #don't get intercepted
6457: $SIG{USR1}= \&logstatus;
6458: $SIG{ALRM}= \&timeout;
6459: #
6460: # Block sigpipe as it gets thrownon socket disconnect and we want to
6461: # deal with that as a read faiure instead.
6462: #
6463: my $blockset = POSIX::SigSet->new(SIGPIPE);
6464: sigprocmask(SIG_BLOCK, $blockset);
6465:
6466: $lastlog='Forked ';
6467: $status='Forked';
6468:
6469: # unblock signals
6470: sigprocmask(SIG_UNBLOCK, $sigset)
6471: or die "Can't unblock SIGINT for fork: $!\n";
6472:
6473: # my $tmpsnum=0; # Now global
6474: #---------------------------------------------------- kerberos 5 initialization
6475: &Authen::Krb5::init_context();
6476: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
6477: ($dist eq 'fedora6') || ($dist eq 'suse9.3') ||
6478: ($dist eq 'suse12.2') || ($dist eq 'suse12.3')) {
6479: &Authen::Krb5::init_ets();
6480: }
6481:
6482: &status('Accepted connection');
6483: # =============================================================================
6484: # do something with the connection
6485: # -----------------------------------------------------------------------------
6486: # see if we know client and 'check' for spoof IP by ineffective challenge
6487:
6488: my $outsideip=$clientip;
6489: if ($clientip eq '127.0.0.1') {
6490: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
6491: }
6492: &ReadManagerTable();
6493: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
6494: my $ismanager=($managers{$outsideip} ne undef);
6495: $clientname = "[unknown]";
6496: if($clientrec) { # Establish client type.
6497: $ConnectionType = "client";
6498: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
6499: if($ismanager) {
6500: $ConnectionType = "both";
6501: }
6502: } else {
6503: $ConnectionType = "manager";
6504: $clientname = $managers{$outsideip};
6505: }
6506: my $clientok;
6507:
6508: if ($clientrec || $ismanager) {
6509: &status("Waiting for init from $clientip $clientname");
6510: &logthis('<font color="yellow">INFO: Connection, '.
6511: $clientip.
6512: " ($clientname) connection type = $ConnectionType </font>" );
6513: &status("Connecting $clientip ($clientname))");
6514: my $remotereq=<$client>;
6515: chomp($remotereq);
6516: Debug("Got init: $remotereq");
6517:
6518: if ($remotereq =~ /^init/) {
6519: &sethost("sethost:$perlvar{'lonHostID'}");
6520: #
6521: # If the remote is attempting a local init... give that a try:
6522: #
6523: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
6524: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
6525: # version when initiating the connection. For LON-CAPA 2.8 and older,
6526: # the version is retrieved from the global %loncaparevs in lonnet.pm.
6527: # $clientversion contains path to keyfile if $inittype eq 'local'
6528: # it's overridden below in this case
6529: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
6530:
6531: # If the connection type is ssl, but I didn't get my
6532: # certificate files yet, then I'll drop back to
6533: # insecure (if allowed).
6534:
6535: if($inittype eq "ssl") {
6536: my ($ca, $cert) = lonssl::CertificateFile;
6537: my $kfile = lonssl::KeyFile;
6538: if((!$ca) ||
6539: (!$cert) ||
6540: (!$kfile)) {
6541: $inittype = ""; # This forces insecure attempt.
6542: &logthis("<font color=\"blue\"> Certificates not "
6543: ."installed -- trying insecure auth</font>");
6544: } else { # SSL certificates are in place so
6545: } # Leave the inittype alone.
6546: }
6547:
6548: if($inittype eq "local") {
6549: $clientversion = $perlvar{'lonVersion'};
6550: my $key = LocalConnection($client, $remotereq);
6551: if($key) {
6552: Debug("Got local key $key");
6553: $clientok = 1;
6554: my $cipherkey = pack("H32", $key);
6555: $cipher = new IDEA($cipherkey);
6556: print $client "ok:local\n";
6557: &logthis('<font color="green">'
6558: . "Successful local authentication </font>");
6559: $keymode = "local"
6560: } else {
6561: Debug("Failed to get local key");
6562: $clientok = 0;
6563: shutdown($client, 3);
6564: close $client;
6565: }
6566: } elsif ($inittype eq "ssl") {
6567: my $key = SSLConnection($client);
6568: if ($key) {
6569: $clientok = 1;
6570: my $cipherkey = pack("H32", $key);
6571: $cipher = new IDEA($cipherkey);
6572: &logthis('<font color="green">'
6573: ."Successfull ssl authentication with $clientname </font>");
6574: $keymode = "ssl";
6575:
6576: } else {
6577: $clientok = 0;
6578: close $client;
6579: }
6580:
6581: } else {
6582: my $ok = InsecureConnection($client);
6583: if($ok) {
6584: $clientok = 1;
6585: &logthis('<font color="green">'
6586: ."Successful insecure authentication with $clientname </font>");
6587: print $client "ok\n";
6588: $keymode = "insecure";
6589: } else {
6590: &logthis('<font color="yellow">'
6591: ."Attempted insecure connection disallowed </font>");
6592: close $client;
6593: $clientok = 0;
6594:
6595: }
6596: }
6597: } else {
6598: &logthis(
6599: "<font color='blue'>WARNING: "
6600: ."$clientip failed to initialize: >$remotereq< </font>");
6601: &status('No init '.$clientip);
6602: }
6603:
6604: } else {
6605: &logthis(
6606: "<font color='blue'>WARNING: Unknown client $clientip</font>");
6607: &status('Hung up on '.$clientip);
6608: }
6609:
6610: if ($clientok) {
6611: # ---------------- New known client connecting, could mean machine online again
6612: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
6613: && $clientip ne '127.0.0.1') {
6614: &Apache::lonnet::reconlonc($clientname);
6615: }
6616: &logthis("<font color='green'>Established connection: $clientname</font>");
6617: &status('Will listen to '.$clientname);
6618: # ------------------------------------------------------------ Process requests
6619: my $keep_going = 1;
6620: my $user_input;
6621: my $clienthost = &Apache::lonnet::hostname($clientname);
6622: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
6623: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
6624: while(($user_input = get_request) && $keep_going) {
6625: alarm(120);
6626: Debug("Main: Got $user_input\n");
6627: $keep_going = &process_request($user_input);
6628: alarm(0);
6629: &status('Listening to '.$clientname." ($keymode)");
6630: }
6631:
6632: # --------------------------------------------- client unknown or fishy, refuse
6633: } else {
6634: print $client "refused\n";
6635: $client->close();
6636: &logthis("<font color='blue'>WARNING: "
6637: ."Rejected client $clientip, closing connection</font>");
6638: }
6639: }
6640:
6641: # =============================================================================
6642:
6643: &logthis("<font color='red'>CRITICAL: "
6644: ."Disconnect from $clientip ($clientname)</font>");
6645:
6646:
6647: # this exit is VERY important, otherwise the child will become
6648: # a producer of more and more children, forking yourself into
6649: # process death.
6650: exit;
6651:
6652: }
6653: #
6654: # Determine if a user is an author for the indicated domain.
6655: #
6656: # Parameters:
6657: # domain - domain to check in .
6658: # user - Name of user to check.
6659: #
6660: # Return:
6661: # 1 - User is an author for domain.
6662: # 0 - User is not an author for domain.
6663: sub is_author {
6664: my ($domain, $user) = @_;
6665:
6666: &Debug("is_author: $user @ $domain");
6667:
6668: my $hashref = &tie_user_hash($domain, $user, "roles",
6669: &GDBM_READER());
6670:
6671: # Author role should show up as a key /domain/_au
6672:
6673: my $value;
6674: if ($hashref) {
6675:
6676: my $key = "/$domain/_au";
6677: if (defined($hashref)) {
6678: $value = $hashref->{$key};
6679: if(!untie_user_hash($hashref)) {
6680: return 'error: ' . ($!+0)." untie (GDBM) Failed";
6681: }
6682: }
6683:
6684: if(defined($value)) {
6685: &Debug("$user @ $domain is an author");
6686: }
6687: } else {
6688: return 'error: '.($!+0)." tie (GDBM) Failed";
6689: }
6690:
6691: return defined($value);
6692: }
6693: #
6694: # Checks to see if the input roleput request was to set
6695: # an author role. If so, creates construction space
6696: # Parameters:
6697: # request - The request sent to the rolesput subchunk.
6698: # We're looking for /domain/_au
6699: # domain - The domain in which the user is having roles doctored.
6700: # user - Name of the user for which the role is being put.
6701: # authtype - The authentication type associated with the user.
6702: #
6703: sub manage_permissions {
6704: my ($request, $domain, $user, $authtype) = @_;
6705: # See if the request is of the form /$domain/_au
6706: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
6707: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
6708: unless (-e $path) {
6709: mkdir($path);
6710: }
6711: unless (-e $path.'/'.$user) {
6712: mkdir($path.'/'.$user);
6713: }
6714: }
6715: }
6716:
6717:
6718: #
6719: # Return the full path of a user password file, whether it exists or not.
6720: # Parameters:
6721: # domain - Domain in which the password file lives.
6722: # user - name of the user.
6723: # Returns:
6724: # Full passwd path:
6725: #
6726: sub password_path {
6727: my ($domain, $user) = @_;
6728: return &propath($domain, $user).'/passwd';
6729: }
6730:
6731: # Password Filename
6732: # Returns the path to a passwd file given domain and user... only if
6733: # it exists.
6734: # Parameters:
6735: # domain - Domain in which to search.
6736: # user - username.
6737: # Returns:
6738: # - If the password file exists returns its path.
6739: # - If the password file does not exist, returns undefined.
6740: #
6741: sub password_filename {
6742: my ($domain, $user) = @_;
6743:
6744: Debug ("PasswordFilename called: dom = $domain user = $user");
6745:
6746: my $path = &password_path($domain, $user);
6747: Debug("PasswordFilename got path: $path");
6748: if(-e $path) {
6749: return $path;
6750: } else {
6751: return undef;
6752: }
6753: }
6754:
6755: #
6756: # Rewrite the contents of the user's passwd file.
6757: # Parameters:
6758: # domain - domain of the user.
6759: # name - User's name.
6760: # contents - New contents of the file.
6761: # Returns:
6762: # 0 - Failed.
6763: # 1 - Success.
6764: #
6765: sub rewrite_password_file {
6766: my ($domain, $user, $contents) = @_;
6767:
6768: my $file = &password_filename($domain, $user);
6769: if (defined $file) {
6770: my $pf = IO::File->new(">$file");
6771: if($pf) {
6772: print $pf "$contents\n";
6773: return 1;
6774: } else {
6775: return 0;
6776: }
6777: } else {
6778: return 0;
6779: }
6780:
6781: }
6782:
6783: #
6784: # get_auth_type - Determines the authorization type of a user in a domain.
6785:
6786: # Returns the authorization type or nouser if there is no such user.
6787: #
6788: sub get_auth_type {
6789: my ($domain, $user) = @_;
6790:
6791: Debug("get_auth_type( $domain, $user ) \n");
6792: my $proname = &propath($domain, $user);
6793: my $passwdfile = "$proname/passwd";
6794: if( -e $passwdfile ) {
6795: my $pf = IO::File->new($passwdfile);
6796: my $realpassword = <$pf>;
6797: chomp($realpassword);
6798: Debug("Password info = $realpassword\n");
6799: my ($authtype, $contentpwd) = split(/:/, $realpassword);
6800: Debug("Authtype = $authtype, content = $contentpwd\n");
6801: return "$authtype:$contentpwd";
6802: } else {
6803: Debug("Returning nouser");
6804: return "nouser";
6805: }
6806: }
6807:
6808: #
6809: # Validate a user given their domain, name and password. This utility
6810: # function is used by both AuthenticateHandler and ChangePasswordHandler
6811: # to validate the login credentials of a user.
6812: # Parameters:
6813: # $domain - The domain being logged into (this is required due to
6814: # the capability for multihomed systems.
6815: # $user - The name of the user being validated.
6816: # $password - The user's propoposed password.
6817: #
6818: # Returns:
6819: # 1 - The domain,user,pasword triplet corresponds to a valid
6820: # user.
6821: # 0 - The domain,user,password triplet is not a valid user.
6822: #
6823: sub validate_user {
6824: my ($domain, $user, $password, $checkdefauth) = @_;
6825:
6826: # Why negative ~pi you may well ask? Well this function is about
6827: # authentication, and therefore very important to get right.
6828: # I've initialized the flag that determines whether or not I've
6829: # validated correctly to a value it's not supposed to get.
6830: # At the end of this function. I'll ensure that it's not still that
6831: # value so we don't just wind up returning some accidental value
6832: # as a result of executing an unforseen code path that
6833: # did not set $validated. At the end of valid execution paths,
6834: # validated shoule be 1 for success or 0 for failuer.
6835:
6836: my $validated = -3.14159;
6837:
6838: # How we authenticate is determined by the type of authentication
6839: # the user has been assigned. If the authentication type is
6840: # "nouser", the user does not exist so we will return 0.
6841:
6842: my $contents = &get_auth_type($domain, $user);
6843: my ($howpwd, $contentpwd) = split(/:/, $contents);
6844:
6845: my $null = pack("C",0); # Used by kerberos auth types.
6846:
6847: if ($howpwd eq 'nouser') {
6848: if ($checkdefauth) {
6849: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
6850: if ($domdefaults{'auth_def'} eq 'localauth') {
6851: $howpwd = $domdefaults{'auth_def'};
6852: $contentpwd = $domdefaults{'auth_arg_def'};
6853: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
6854: ($domdefaults{'auth_def'} eq 'krb5')) &&
6855: ($domdefaults{'auth_arg_def'} ne '')) {
6856: $howpwd = $domdefaults{'auth_def'};
6857: $contentpwd = $domdefaults{'auth_arg_def'};
6858: }
6859: }
6860: }
6861: if ($howpwd ne 'nouser') {
6862: if($howpwd eq "internal") { # Encrypted is in local password file.
6863: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6864: }
6865: elsif ($howpwd eq "unix") { # User is a normal unix user.
6866: $contentpwd = (getpwnam($user))[1];
6867: if($contentpwd) {
6868: if($contentpwd eq 'x') { # Shadow password file...
6869: my $pwauth_path = "/usr/local/sbin/pwauth";
6870: open PWAUTH, "|$pwauth_path" or
6871: die "Cannot invoke authentication";
6872: print PWAUTH "$user\n$password\n";
6873: close PWAUTH;
6874: $validated = ! $?;
6875:
6876: } else { # Passwords in /etc/passwd.
6877: $validated = (crypt($password,
6878: $contentpwd) eq $contentpwd);
6879: }
6880: } else {
6881: $validated = 0;
6882: }
6883: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6884: my $checkwithkrb5 = 0;
6885: if ($dist =~/^fedora(\d+)$/) {
6886: if ($1 > 11) {
6887: $checkwithkrb5 = 1;
6888: }
6889: } elsif ($dist =~ /^suse([\d.]+)$/) {
6890: if ($1 > 11.1) {
6891: $checkwithkrb5 = 1;
6892: }
6893: }
6894: if ($checkwithkrb5) {
6895: $validated = &krb5_authen($password,$null,$user,$contentpwd);
6896: } else {
6897: $validated = &krb4_authen($password,$null,$user,$contentpwd);
6898: }
6899: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
6900: $validated = &krb5_authen($password,$null,$user,$contentpwd);
6901: } elsif ($howpwd eq "localauth") {
6902: # Authenticate via installation specific authentcation method:
6903: $validated = &localauth::localauth($user,
6904: $password,
6905: $contentpwd,
6906: $domain);
6907: if ($validated < 0) {
6908: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6909: $validated = 0;
6910: }
6911: } else { # Unrecognized auth is also bad.
6912: $validated = 0;
6913: }
6914: } else {
6915: $validated = 0;
6916: }
6917: #
6918: # $validated has the correct stat of the authentication:
6919: #
6920:
6921: unless ($validated != -3.14159) {
6922: # I >really really< want to know if this happens.
6923: # since it indicates that user authentication is badly
6924: # broken in some code path.
6925: #
6926: die "ValidateUser - failed to set the value of validated $domain, $user $password";
6927: }
6928: return $validated;
6929: }
6930:
6931: sub krb4_authen {
6932: my ($password,$null,$user,$contentpwd) = @_;
6933: my $validated = 0;
6934: if (!($password =~ /$null/) ) { # Null password not allowed.
6935: eval {
6936: require Authen::Krb4;
6937: };
6938: if (!$@) {
6939: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6940: "",
6941: $contentpwd,,
6942: 'krbtgt',
6943: $contentpwd,
6944: 1,
6945: $password);
6946: if(!$k4error) {
6947: $validated = 1;
6948: } else {
6949: $validated = 0;
6950: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6951: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6952: }
6953: } else {
6954: $validated = krb5_authen($password,$null,$user,$contentpwd);
6955: }
6956: }
6957: return $validated;
6958: }
6959:
6960: sub krb5_authen {
6961: my ($password,$null,$user,$contentpwd) = @_;
6962: my $validated = 0;
6963: if(!($password =~ /$null/)) { # Null password not allowed.
6964: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6965: .$contentpwd);
6966: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6967: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6968: my $credentials= &Authen::Krb5::cc_default();
6969: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6970: .$contentpwd));
6971: my $krbreturn;
6972: if (exists(&Authen::Krb5::get_init_creds_password)) {
6973: $krbreturn =
6974: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6975: $krbservice);
6976: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6977: } else {
6978: $krbreturn =
6979: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6980: $password,$credentials);
6981: $validated = ($krbreturn == 1);
6982: }
6983: if (!$validated) {
6984: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6985: &Authen::Krb5::error());
6986: }
6987: }
6988: return $validated;
6989: }
6990:
6991: sub addline {
6992: my ($fname,$hostid,$ip,$newline)=@_;
6993: my $contents;
6994: my $found=0;
6995: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
6996: my $sh;
6997: if ($sh=IO::File->new("$fname.subscription")) {
6998: while (my $subline=<$sh>) {
6999: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
7000: }
7001: $sh->close();
7002: }
7003: $sh=IO::File->new(">$fname.subscription");
7004: if ($contents) { print $sh $contents; }
7005: if ($newline) { print $sh $newline; }
7006: $sh->close();
7007: return $found;
7008: }
7009:
7010: sub get_chat {
7011: my ($cdom,$cname,$udom,$uname,$group)=@_;
7012:
7013: my @entries=();
7014: my $namespace = 'nohist_chatroom';
7015: my $namespace_inroom = 'nohist_inchatroom';
7016: if ($group ne '') {
7017: $namespace .= '_'.$group;
7018: $namespace_inroom .= '_'.$group;
7019: }
7020: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7021: &GDBM_READER());
7022: if ($hashref) {
7023: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7024: &untie_user_hash($hashref);
7025: }
7026: my @participants=();
7027: my $cutoff=time-60;
7028: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
7029: &GDBM_WRCREAT());
7030: if ($hashref) {
7031: $hashref->{$uname.':'.$udom}=time;
7032: foreach my $user (sort(keys(%$hashref))) {
7033: if ($hashref->{$user}>$cutoff) {
7034: push(@participants, 'active_participant:'.$user);
7035: }
7036: }
7037: &untie_user_hash($hashref);
7038: }
7039: return (@participants,@entries);
7040: }
7041:
7042: sub chat_add {
7043: my ($cdom,$cname,$newchat,$group)=@_;
7044: my @entries=();
7045: my $time=time;
7046: my $namespace = 'nohist_chatroom';
7047: my $logfile = 'chatroom.log';
7048: if ($group ne '') {
7049: $namespace .= '_'.$group;
7050: $logfile = 'chatroom_'.$group.'.log';
7051: }
7052: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7053: &GDBM_WRCREAT());
7054: if ($hashref) {
7055: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7056: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
7057: my ($thentime,$idnum)=split(/\_/,$lastid);
7058: my $newid=$time.'_000000';
7059: if ($thentime==$time) {
7060: $idnum=~s/^0+//;
7061: $idnum++;
7062: $idnum=substr('000000'.$idnum,-6,6);
7063: $newid=$time.'_'.$idnum;
7064: }
7065: $hashref->{$newid}=$newchat;
7066: my $expired=$time-3600;
7067: foreach my $comment (keys(%$hashref)) {
7068: my ($thistime) = ($comment=~/(\d+)\_/);
7069: if ($thistime<$expired) {
7070: delete $hashref->{$comment};
7071: }
7072: }
7073: {
7074: my $proname=&propath($cdom,$cname);
7075: if (open(CHATLOG,">>$proname/$logfile")) {
7076: print CHATLOG ("$time:".&unescape($newchat)."\n");
7077: }
7078: close(CHATLOG);
7079: }
7080: &untie_user_hash($hashref);
7081: }
7082: }
7083:
7084: sub unsub {
7085: my ($fname,$clientip)=@_;
7086: my $result;
7087: my $unsubs = 0; # Number of successful unsubscribes:
7088:
7089:
7090: # An old way subscriptions were handled was to have a
7091: # subscription marker file:
7092:
7093: Debug("Attempting unlink of $fname.$clientname");
7094: if (unlink("$fname.$clientname")) {
7095: $unsubs++; # Successful unsub via marker file.
7096: }
7097:
7098: # The more modern way to do it is to have a subscription list
7099: # file:
7100:
7101: if (-e "$fname.subscription") {
7102: my $found=&addline($fname,$clientname,$clientip,'');
7103: if ($found) {
7104: $unsubs++;
7105: }
7106: }
7107:
7108: # If either or both of these mechanisms succeeded in unsubscribing a
7109: # resource we can return ok:
7110:
7111: if($unsubs) {
7112: $result = "ok\n";
7113: } else {
7114: $result = "not_subscribed\n";
7115: }
7116:
7117: return $result;
7118: }
7119:
7120: sub currentversion {
7121: my $fname=shift;
7122: my $version=-1;
7123: my $ulsdir='';
7124: if ($fname=~/^(.+)\/[^\/]+$/) {
7125: $ulsdir=$1;
7126: }
7127: my ($fnamere1,$fnamere2);
7128: # remove version if already specified
7129: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
7130: # get the bits that go before and after the version number
7131: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7132: $fnamere1=$1;
7133: $fnamere2='.'.$2;
7134: }
7135: if (-e $fname) { $version=1; }
7136: if (-e $ulsdir) {
7137: if(-d $ulsdir) {
7138: if (opendir(LSDIR,$ulsdir)) {
7139: my $ulsfn;
7140: while ($ulsfn=readdir(LSDIR)) {
7141: # see if this is a regular file (ignore links produced earlier)
7142: my $thisfile=$ulsdir.'/'.$ulsfn;
7143: unless (-l $thisfile) {
7144: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
7145: if ($1>$version) { $version=$1; }
7146: }
7147: }
7148: }
7149: closedir(LSDIR);
7150: $version++;
7151: }
7152: }
7153: }
7154: return $version;
7155: }
7156:
7157: sub thisversion {
7158: my $fname=shift;
7159: my $version=-1;
7160: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7161: $version=$1;
7162: }
7163: return $version;
7164: }
7165:
7166: sub subscribe {
7167: my ($userinput,$clientip)=@_;
7168: my $result;
7169: my ($cmd,$fname)=split(/:/,$userinput,2);
7170: my $ownership=&ishome($fname);
7171: if ($ownership eq 'owner') {
7172: # explitly asking for the current version?
7173: unless (-e $fname) {
7174: my $currentversion=¤tversion($fname);
7175: if (&thisversion($fname)==$currentversion) {
7176: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7177: my $root=$1;
7178: my $extension=$2;
7179: symlink($root.'.'.$extension,
7180: $root.'.'.$currentversion.'.'.$extension);
7181: unless ($extension=~/\.meta$/) {
7182: symlink($root.'.'.$extension.'.meta',
7183: $root.'.'.$currentversion.'.'.$extension.'.meta');
7184: }
7185: }
7186: }
7187: }
7188: if (-e $fname) {
7189: if (-d $fname) {
7190: $result="directory\n";
7191: } else {
7192: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
7193: my $now=time;
7194: my $found=&addline($fname,$clientname,$clientip,
7195: "$clientname:$clientip:$now\n");
7196: if ($found) { $result="$fname\n"; }
7197: # if they were subscribed to only meta data, delete that
7198: # subscription, when you subscribe to a file you also get
7199: # the metadata
7200: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7201: $fname=~s/\/home\/httpd\/html\/res/raw/;
7202: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
7203: $protocol = 'http' if ($protocol ne 'https');
7204: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
7205: $result="$fname\n";
7206: }
7207: } else {
7208: $result="not_found\n";
7209: }
7210: } else {
7211: $result="rejected\n";
7212: }
7213: return $result;
7214: }
7215: # Change the passwd of a unix user. The caller must have
7216: # first verified that the user is a loncapa user.
7217: #
7218: # Parameters:
7219: # user - Unix user name to change.
7220: # pass - New password for the user.
7221: # Returns:
7222: # ok - if success
7223: # other - Some meaningfule error message string.
7224: # NOTE:
7225: # invokes a setuid script to change the passwd.
7226: sub change_unix_password {
7227: my ($user, $pass) = @_;
7228:
7229: &Debug("change_unix_password");
7230: my $execdir=$perlvar{'lonDaemons'};
7231: &Debug("Opening lcpasswd pipeline");
7232: my $pf = IO::File->new("|$execdir/lcpasswd > "
7233: ."$perlvar{'lonDaemons'}"
7234: ."/logs/lcpasswd.log");
7235: print $pf "$user\n$pass\n$pass\n";
7236: close $pf;
7237: my $err = $?;
7238: return ($err < @passwderrors) ? $passwderrors[$err] :
7239: "pwchange_falure - unknown error";
7240:
7241:
7242: }
7243:
7244:
7245: sub make_passwd_file {
7246: my ($uname,$udom,$umode,$npass,$passfilename)=@_;
7247: my $result="ok";
7248: if ($umode eq 'krb4' or $umode eq 'krb5') {
7249: {
7250: my $pf = IO::File->new(">$passfilename");
7251: if ($pf) {
7252: print $pf "$umode:$npass\n";
7253: } else {
7254: $result = "pass_file_failed_error";
7255: }
7256: }
7257: } elsif ($umode eq 'internal') {
7258: my $salt=time;
7259: $salt=substr($salt,6,2);
7260: my $ncpass=crypt($npass,$salt);
7261: {
7262: &Debug("Creating internal auth");
7263: my $pf = IO::File->new(">$passfilename");
7264: if($pf) {
7265: print $pf "internal:$ncpass\n";
7266: } else {
7267: $result = "pass_file_failed_error";
7268: }
7269: }
7270: } elsif ($umode eq 'localauth') {
7271: {
7272: my $pf = IO::File->new(">$passfilename");
7273: if($pf) {
7274: print $pf "localauth:$npass\n";
7275: } else {
7276: $result = "pass_file_failed_error";
7277: }
7278: }
7279: } elsif ($umode eq 'unix') {
7280: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
7281: $result="no_new_unix_accounts";
7282: } elsif ($umode eq 'none') {
7283: {
7284: my $pf = IO::File->new("> $passfilename");
7285: if($pf) {
7286: print $pf "none:\n";
7287: } else {
7288: $result = "pass_file_failed_error";
7289: }
7290: }
7291: } else {
7292: $result="auth_mode_error";
7293: }
7294: return $result;
7295: }
7296:
7297: sub convert_photo {
7298: my ($start,$dest)=@_;
7299: system("convert $start $dest");
7300: }
7301:
7302: sub sethost {
7303: my ($remotereq) = @_;
7304: my (undef,$hostid)=split(/:/,$remotereq);
7305: # ignore sethost if we are already correct
7306: if ($hostid eq $currenthostid) {
7307: return 'ok';
7308: }
7309:
7310: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
7311: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7312: eq &Apache::lonnet::get_host_ip($hostid)) {
7313: $currenthostid =$hostid;
7314: $currentdomainid=&Apache::lonnet::host_domain($hostid);
7315: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
7316: } else {
7317: &logthis("Requested host id $hostid not an alias of ".
7318: $perlvar{'lonHostID'}." refusing connection");
7319: return 'unable_to_set';
7320: }
7321: return 'ok';
7322: }
7323:
7324: sub version {
7325: my ($userinput)=@_;
7326: $remoteVERSION=(split(/:/,$userinput))[1];
7327: return "version:$VERSION";
7328: }
7329:
7330: sub get_usersession_config {
7331: my ($dom,$name) = @_;
7332: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
7333: if (defined($cached)) {
7334: return $usersessionconf;
7335: } else {
7336: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
7337: if (ref($domconfig{'usersessions'}) eq 'HASH') {
7338: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
7339: return $domconfig{'usersessions'};
7340: }
7341: }
7342: return;
7343: }
7344:
7345:
7346: sub distro_and_arch {
7347: return $dist.':'.$arch;
7348: }
7349:
7350: # ----------------------------------- POD (plain old documentation, CPAN style)
7351:
7352: =head1 NAME
7353:
7354: lond - "LON Daemon" Server (port "LOND" 5663)
7355:
7356: =head1 SYNOPSIS
7357:
7358: Usage: B<lond>
7359:
7360: Should only be run as user=www. This is a command-line script which
7361: is invoked by B<loncron>. There is no expectation that a typical user
7362: will manually start B<lond> from the command-line. (In other words,
7363: DO NOT START B<lond> YOURSELF.)
7364:
7365: =head1 DESCRIPTION
7366:
7367: There are two characteristics associated with the running of B<lond>,
7368: PROCESS MANAGEMENT (starting, stopping, handling child processes)
7369: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
7370: subscriptions, etc). These are described in two large
7371: sections below.
7372:
7373: B<PROCESS MANAGEMENT>
7374:
7375: Preforker - server who forks first. Runs as a daemon. HUPs.
7376: Uses IDEA encryption
7377:
7378: B<lond> forks off children processes that correspond to the other servers
7379: in the network. Management of these processes can be done at the
7380: parent process level or the child process level.
7381:
7382: B<logs/lond.log> is the location of log messages.
7383:
7384: The process management is now explained in terms of linux shell commands,
7385: subroutines internal to this code, and signal assignments:
7386:
7387: =over 4
7388:
7389: =item *
7390:
7391: PID is stored in B<logs/lond.pid>
7392:
7393: This is the process id number of the parent B<lond> process.
7394:
7395: =item *
7396:
7397: SIGTERM and SIGINT
7398:
7399: Parent signal assignment:
7400: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7401:
7402: Child signal assignment:
7403: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
7404: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
7405: to restart a new child.)
7406:
7407: Command-line invocations:
7408: B<kill> B<-s> SIGTERM I<PID>
7409: B<kill> B<-s> SIGINT I<PID>
7410:
7411: Subroutine B<HUNTSMAN>:
7412: This is only invoked for the B<lond> parent I<PID>.
7413: This kills all the children, and then the parent.
7414: The B<lonc.pid> file is cleared.
7415:
7416: =item *
7417:
7418: SIGHUP
7419:
7420: Current bug:
7421: This signal can only be processed the first time
7422: on the parent process. Subsequent SIGHUP signals
7423: have no effect.
7424:
7425: Parent signal assignment:
7426: $SIG{HUP} = \&HUPSMAN;
7427:
7428: Child signal assignment:
7429: none (nothing happens)
7430:
7431: Command-line invocations:
7432: B<kill> B<-s> SIGHUP I<PID>
7433:
7434: Subroutine B<HUPSMAN>:
7435: This is only invoked for the B<lond> parent I<PID>,
7436: This kills all the children, and then the parent.
7437: The B<lond.pid> file is cleared.
7438:
7439: =item *
7440:
7441: SIGUSR1
7442:
7443: Parent signal assignment:
7444: $SIG{USR1} = \&USRMAN;
7445:
7446: Child signal assignment:
7447: $SIG{USR1}= \&logstatus;
7448:
7449: Command-line invocations:
7450: B<kill> B<-s> SIGUSR1 I<PID>
7451:
7452: Subroutine B<USRMAN>:
7453: When invoked for the B<lond> parent I<PID>,
7454: SIGUSR1 is sent to all the children, and the status of
7455: each connection is logged.
7456:
7457: =item *
7458:
7459: SIGUSR2
7460:
7461: Parent Signal assignment:
7462: $SIG{USR2} = \&UpdateHosts
7463:
7464: Child signal assignment:
7465: NONE
7466:
7467:
7468: =item *
7469:
7470: SIGCHLD
7471:
7472: Parent signal assignment:
7473: $SIG{CHLD} = \&REAPER;
7474:
7475: Child signal assignment:
7476: none
7477:
7478: Command-line invocations:
7479: B<kill> B<-s> SIGCHLD I<PID>
7480:
7481: Subroutine B<REAPER>:
7482: This is only invoked for the B<lond> parent I<PID>.
7483: Information pertaining to the child is removed.
7484: The socket port is cleaned up.
7485:
7486: =back
7487:
7488: B<SERVER-SIDE ACTIVITIES>
7489:
7490: Server-side information can be accepted in an encrypted or non-encrypted
7491: method.
7492:
7493: =over 4
7494:
7495: =item ping
7496:
7497: Query a client in the hosts.tab table; "Are you there?"
7498:
7499: =item pong
7500:
7501: Respond to a ping query.
7502:
7503: =item ekey
7504:
7505: Read in encrypted key, make cipher. Respond with a buildkey.
7506:
7507: =item load
7508:
7509: Respond with CPU load based on a computation upon /proc/loadavg.
7510:
7511: =item currentauth
7512:
7513: Reply with current authentication information (only over an
7514: encrypted channel).
7515:
7516: =item auth
7517:
7518: Only over an encrypted channel, reply as to whether a user's
7519: authentication information can be validated.
7520:
7521: =item passwd
7522:
7523: Allow for a password to be set.
7524:
7525: =item makeuser
7526:
7527: Make a user.
7528:
7529: =item passwd
7530:
7531: Allow for authentication mechanism and password to be changed.
7532:
7533: =item home
7534:
7535: Respond to a question "are you the home for a given user?"
7536:
7537: =item update
7538:
7539: Update contents of a subscribed resource.
7540:
7541: =item unsubscribe
7542:
7543: The server is unsubscribing from a resource.
7544:
7545: =item subscribe
7546:
7547: The server is subscribing to a resource.
7548:
7549: =item log
7550:
7551: Place in B<logs/lond.log>
7552:
7553: =item put
7554:
7555: stores hash in namespace
7556:
7557: =item rolesput
7558:
7559: put a role into a user's environment
7560:
7561: =item get
7562:
7563: returns hash with keys from array
7564: reference filled in from namespace
7565:
7566: =item eget
7567:
7568: returns hash with keys from array
7569: reference filled in from namesp (encrypts the return communication)
7570:
7571: =item rolesget
7572:
7573: get a role from a user's environment
7574:
7575: =item del
7576:
7577: deletes keys out of array from namespace
7578:
7579: =item keys
7580:
7581: returns namespace keys
7582:
7583: =item dump
7584:
7585: dumps the complete (or key matching regexp) namespace into a hash
7586:
7587: =item store
7588:
7589: stores hash permanently
7590: for this url; hashref needs to be given and should be a \%hashname; the
7591: remaining args aren't required and if they aren't passed or are '' they will
7592: be derived from the ENV
7593:
7594: =item restore
7595:
7596: returns a hash for a given url
7597:
7598: =item querysend
7599:
7600: Tells client about the lonsql process that has been launched in response
7601: to a sent query.
7602:
7603: =item queryreply
7604:
7605: Accept information from lonsql and make appropriate storage in temporary
7606: file space.
7607:
7608: =item idput
7609:
7610: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
7611: for each student, defined perhaps by the institutional Registrar.)
7612:
7613: =item idget
7614:
7615: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
7616: for each student, defined perhaps by the institutional Registrar.)
7617:
7618: =item tmpput
7619:
7620: Accept and store information in temporary space.
7621:
7622: =item tmpget
7623:
7624: Send along temporarily stored information.
7625:
7626: =item ls
7627:
7628: List part of a user's directory.
7629:
7630: =item pushtable
7631:
7632: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
7633: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
7634: must be restored manually in case of a problem with the new table file.
7635: pushtable requires that the request be encrypted and validated via
7636: ValidateManager. The form of the command is:
7637: enc:pushtable tablename <tablecontents> \n
7638: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
7639: cleartext newline.
7640:
7641: =item Hanging up (exit or init)
7642:
7643: What to do when a client tells the server that they (the client)
7644: are leaving the network.
7645:
7646: =item unknown command
7647:
7648: If B<lond> is sent an unknown command (not in the list above),
7649: it replys to the client "unknown_cmd".
7650:
7651:
7652: =item UNKNOWN CLIENT
7653:
7654: If the anti-spoofing algorithm cannot verify the client,
7655: the client is rejected (with a "refused" message sent
7656: to the client, and the connection is closed.
7657:
7658: =back
7659:
7660: =head1 PREREQUISITES
7661:
7662: IO::Socket
7663: IO::File
7664: Apache::File
7665: POSIX
7666: Crypt::IDEA
7667: LWP::UserAgent()
7668: GDBM_File
7669: Authen::Krb4
7670: Authen::Krb5
7671:
7672: =head1 COREQUISITES
7673:
7674: =head1 OSNAMES
7675:
7676: linux
7677:
7678: =head1 SCRIPT CATEGORIES
7679:
7680: Server/Process
7681:
7682: =cut
7683:
7684:
7685: =pod
7686:
7687: =head1 LOG MESSAGES
7688:
7689: The messages below can be emitted in the lond log. This log is located
7690: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
7691: to provide coloring if examined from inside a web page. Some do not.
7692: Where color is used, the colors are; Red for sometihhng to get excited
7693: about and to follow up on. Yellow for something to keep an eye on to
7694: be sure it does not get worse, Green,and Blue for informational items.
7695:
7696: In the discussions below, sometimes reference is made to ~httpd
7697: when describing file locations. There isn't really an httpd
7698: user, however there is an httpd directory that gets installed in the
7699: place that user home directories go. On linux, this is usually
7700: (always?) /home/httpd.
7701:
7702:
7703: Some messages are colorless. These are usually (not always)
7704: Green/Blue color level messages.
7705:
7706: =over 2
7707:
7708: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
7709:
7710: A local connection negotiation was attempted by
7711: a host whose IP address was not 127.0.0.1.
7712: The socket is closed and the child will exit.
7713: lond has three ways to establish an encyrption
7714: key with a client:
7715:
7716: =over 2
7717:
7718: =item local
7719:
7720: The key is written and read from a file.
7721: This is only valid for connections from localhost.
7722:
7723: =item insecure
7724:
7725: The key is generated by the server and
7726: transmitted to the client.
7727:
7728: =item ssl (secure)
7729:
7730: An ssl connection is negotiated with the client,
7731: the key is generated by the server and sent to the
7732: client across this ssl connection before the
7733: ssl connectionis terminated and clear text
7734: transmission resumes.
7735:
7736: =back
7737:
7738: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
7739:
7740: The client is local but has not sent an initialization
7741: string that is the literal "init:local" The connection
7742: is closed and the child exits.
7743:
7744: =item Red CRITICAL Can't get key file <error>
7745:
7746: SSL key negotiation is being attempted but the call to
7747: lonssl::KeyFile failed. This usually means that the
7748: configuration file is not correctly defining or protecting
7749: the directories/files lonCertificateDirectory or
7750: lonnetPrivateKey
7751: <error> is a string that describes the reason that
7752: the key file could not be located.
7753:
7754: =item (Red) CRITICAL Can't get certificates <error>
7755:
7756: SSL key negotiation failed because we were not able to retrives our certificate
7757: or the CA's certificate in the call to lonssl::CertificateFile
7758: <error> is the textual reason this failed. Usual reasons:
7759:
7760: =over 2
7761:
7762: =item Apache config file for loncapa incorrect:
7763:
7764: one of the variables
7765: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
7766: undefined or incorrect
7767:
7768: =item Permission error:
7769:
7770: The directory pointed to by lonCertificateDirectory is not readable by lond
7771:
7772: =item Permission error:
7773:
7774: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
7775:
7776: =item Installation error:
7777:
7778: Either the certificate authority file or the certificate have not
7779: been installed in lonCertificateDirectory.
7780:
7781: =item (Red) CRITICAL SSL Socket promotion failed: <err>
7782:
7783: The promotion of the connection from plaintext to SSL failed
7784: <err> is the reason for the failure. There are two
7785: system calls involved in the promotion (one of which failed),
7786: a dup to produce
7787: a second fd on the raw socket over which the encrypted data
7788: will flow and IO::SOcket::SSL->new_from_fd which creates
7789: the SSL connection on the duped fd.
7790:
7791: =item (Blue) WARNING client did not respond to challenge
7792:
7793: This occurs on an insecure (non SSL) connection negotiation request.
7794: lond generates some number from the time, the PID and sends it to
7795: the client. The client must respond by echoing this information back.
7796: If the client does not do so, that's a violation of the challenge
7797: protocols and the connection will be failed.
7798:
7799: =item (Red) No manager table. Nobody can manage!!
7800:
7801: lond has the concept of privileged hosts that
7802: can perform remote management function such
7803: as update the hosts.tab. The manager hosts
7804: are described in the
7805: ~httpd/lonTabs/managers.tab file.
7806: this message is logged if this file is missing.
7807:
7808:
7809: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
7810:
7811: Reports the successful parse and registration
7812: of a specific manager.
7813:
7814: =item Green existing host <clustername:dnsname>
7815:
7816: The manager host is already defined in the hosts.tab
7817: the information in that table, rather than the info in the
7818: manager table will be used to determine the manager's ip.
7819:
7820: =item (Red) Unable to craete <filename>
7821:
7822: lond has been asked to create new versions of an administrative
7823: file (by a manager). When this is done, the new file is created
7824: in a temp file and then renamed into place so that there are always
7825: usable administrative files, even if the update fails. This failure
7826: message means that the temp file could not be created.
7827: The update is abandoned, and the old file is available for use.
7828:
7829: =item (Green) CopyFile from <oldname> to <newname> failed
7830:
7831: In an update of administrative files, the copy of the existing file to a
7832: backup file failed. The installation of the new file may still succeed,
7833: but there will not be a back up file to rever to (this should probably
7834: be yellow).
7835:
7836: =item (Green) Pushfile: backed up <oldname> to <newname>
7837:
7838: See above, the backup of the old administrative file succeeded.
7839:
7840: =item (Red) Pushfile: Unable to install <filename> <reason>
7841:
7842: The new administrative file could not be installed. In this case,
7843: the old administrative file is still in use.
7844:
7845: =item (Green) Installed new < filename>.
7846:
7847: The new administrative file was successfullly installed.
7848:
7849: =item (Red) Reinitializing lond pid=<pid>
7850:
7851: The lonc child process <pid> will be sent a USR2
7852: signal.
7853:
7854: =item (Red) Reinitializing self
7855:
7856: We've been asked to re-read our administrative files,and
7857: are doing so.
7858:
7859: =item (Yellow) error:Invalid process identifier <ident>
7860:
7861: A reinit command was received, but the target part of the
7862: command was not valid. It must be either
7863: 'lond' or 'lonc' but was <ident>
7864:
7865: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
7866:
7867: Checking to see if lond has been handed a valid edit
7868: command. It is possible the edit command is not valid
7869: in that case there are no log messages to indicate that.
7870:
7871: =item Result of password change for <username> pwchange_success
7872:
7873: The password for <username> was
7874: successfully changed.
7875:
7876: =item Unable to open <user> passwd to change password
7877:
7878: Could not rewrite the
7879: internal password file for a user
7880:
7881: =item Result of password change for <user> : <result>
7882:
7883: A unix password change for <user> was attempted
7884: and the pipe returned <result>
7885:
7886: =item LWP GET: <message> for <fname> (<remoteurl>)
7887:
7888: The lightweight process fetch for a resource failed
7889: with <message> the local filename that should
7890: have existed/been created was <fname> the
7891: corresponding URI: <remoteurl> This is emitted in several
7892: places.
7893:
7894: =item Unable to move <transname> to <destname>
7895:
7896: From fetch_user_file_handler - the user file was replicated but could not
7897: be mv'd to its final location.
7898:
7899: =item Looking for <domain> <username>
7900:
7901: From user_has_session_handler - This should be a Debug call instead
7902: it indicates lond is about to check whether the specified user has a
7903: session active on the specified domain on the local host.
7904:
7905: =item Client <ip> (<name>) hanging up: <input>
7906:
7907: lond has been asked to exit by its client. The <ip> and <name> identify the
7908: client systemand <input> is the full exit command sent to the server.
7909:
7910: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
7911:
7912: A lond child terminated. NOte that this termination can also occur when the
7913: child receives the QUIT or DIE signals. <pid> is the process id of the child,
7914: <hostname> the host lond is working for, and <message> the reason the child died
7915: to the best of our ability to get it (I would guess that any numeric value
7916: represents and errno value). This is immediately followed by
7917:
7918: =item Famous last words: Catching exception - <log>
7919:
7920: Where log is some recent information about the state of the child.
7921:
7922: =item Red CRITICAL: TIME OUT <pid>
7923:
7924: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
7925: doing an HTTP::GET.
7926:
7927: =item child <pid> died
7928:
7929: The reaper caught a SIGCHILD for the lond child process <pid>
7930: This should be modified to also display the IP of the dying child
7931: $children{$pid}
7932:
7933: =item Unknown child 0 died
7934: A child died but the wait for it returned a pid of zero which really should not
7935: ever happen.
7936:
7937: =item Child <which> - <pid> looks like we missed it's death
7938:
7939: When a sigchild is received, the reaper process checks all children to see if they are
7940: alive. If children are dying quite quickly, the lack of signal queuing can mean
7941: that a signal hearalds the death of more than one child. If so this message indicates
7942: which other one died. <which> is the ip of a dead child
7943:
7944: =item Free socket: <shutdownretval>
7945:
7946: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
7947: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
7948: to return anything. This is followed by:
7949:
7950: =item Red CRITICAL: Shutting down
7951:
7952: Just prior to exit.
7953:
7954: =item Free socket: <shutdownretval>
7955:
7956: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
7957: This is followed by:
7958:
7959: =item (Red) CRITICAL: Restarting
7960:
7961: lond is about to exec itself to restart.
7962:
7963: =item (Blue) Updating connections
7964:
7965: (In response to a USR2). All the children (except the one for localhost)
7966: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
7967:
7968: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
7969:
7970: Due to USR2 as above.
7971:
7972: =item (Green) keeping child for ip <ip> (pid = <pid>)
7973:
7974: In response to USR2 as above, the child indicated is not being restarted because
7975: it's assumed that we'll always need a child for the localhost.
7976:
7977:
7978: =item Going to check on the children
7979:
7980: Parent is about to check on the health of the child processes.
7981: Note that this is in response to a USR1 sent to the parent lond.
7982: there may be one or more of the next two messages:
7983:
7984: =item <pid> is dead
7985:
7986: A child that we have in our child hash as alive has evidently died.
7987:
7988: =item Child <pid> did not respond
7989:
7990: In the health check the child <pid> did not update/produce a pid_.txt
7991: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
7992: assumed to be hung in some un-fixable way.
7993:
7994: =item Finished checking children
7995:
7996: Master processs's USR1 processing is cojmplete.
7997:
7998: =item (Red) CRITICAL: ------- Starting ------
7999:
8000: (There are more '-'s on either side). Lond has forked itself off to
8001: form a new session and is about to start actual initialization.
8002:
8003: =item (Green) Attempting to start child (<client>)
8004:
8005: Started a new child process for <client>. Client is IO::Socket object
8006: connected to the child. This was as a result of a TCP/IP connection from a client.
8007:
8008: =item Unable to determine who caller was, getpeername returned nothing
8009:
8010: In child process initialization. either getpeername returned undef or
8011: a zero sized object was returned. Processing continues, but in my opinion,
8012: this should be cause for the child to exit.
8013:
8014: =item Unable to determine clientip
8015:
8016: In child process initialization. The peer address from getpeername was not defined.
8017: The client address is stored as "Unavailable" and processing continues.
8018:
8019: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8020:
8021: In child initialization. A good connectionw as received from <ip>.
8022:
8023: =over 2
8024:
8025: =item <name>
8026:
8027: is the name of the client from hosts.tab.
8028:
8029: =item <type>
8030:
8031: Is the connection type which is either
8032:
8033: =over 2
8034:
8035: =item manager
8036:
8037: The connection is from a manager node, not in hosts.tab
8038:
8039: =item client
8040:
8041: the connection is from a non-manager in the hosts.tab
8042:
8043: =item both
8044:
8045: The connection is from a manager in the hosts.tab.
8046:
8047: =back
8048:
8049: =back
8050:
8051: =item (Blue) Certificates not installed -- trying insecure auth
8052:
8053: One of the certificate file, key file or
8054: certificate authority file could not be found for a client attempting
8055: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8056: (this would be a system with an up to date lond that has not gotten a
8057: certificate from us).
8058:
8059: =item (Green) Successful local authentication
8060:
8061: A local connection successfully negotiated the encryption key.
8062: In this case the IDEA key is in a file (that is hopefully well protected).
8063:
8064: =item (Green) Successful ssl authentication with <client>
8065:
8066: The client (<client> is the peer's name in hosts.tab), has successfully
8067: negotiated an SSL connection with this child process.
8068:
8069: =item (Green) Successful insecure authentication with <client>
8070:
8071:
8072: The client has successfully negotiated an insecure connection withthe child process.
8073:
8074: =item (Yellow) Attempted insecure connection disallowed
8075:
8076: The client attempted and failed to successfully negotiate a successful insecure
8077: connection. This can happen either because the variable londAllowInsecure is false
8078: or undefined, or becuse the child did not successfully echo back the challenge
8079: string.
8080:
8081:
8082: =back
8083:
8084: =back
8085:
8086:
8087: =cut
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