1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.374 2007/05/31 05:17:48 albertel Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA;
35: use LONCAPA::Configuration;
36: use Apache::lonnet;
37:
38: use IO::Socket;
39: use IO::File;
40: #use Apache::File;
41: use POSIX;
42: use Crypt::IDEA;
43: use LWP::UserAgent();
44: use Digest::MD5 qw(md5_hex);
45: use GDBM_File;
46: use Authen::Krb4;
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:
57: my $DEBUG = 0; # Non zero to enable debug log entries.
58:
59: my $status='';
60: my $lastlog='';
61:
62: my $VERSION='$Revision: 1.374 $'; #' stupid emacs
63: my $remoteVERSION;
64: my $currenthostid="default";
65: my $currentdomainid;
66:
67: my $client;
68: my $clientip; # IP address of client.
69: my $clientname; # LonCAPA name of client.
70:
71: my $server;
72:
73: my $keymode;
74:
75: my $cipher; # Cipher key negotiated with client
76: my $tmpsnum = 0; # Id of tmpputs.
77:
78: #
79: # Connection type is:
80: # client - All client actions are allowed
81: # manager - only management functions allowed.
82: # both - Both management and client actions are allowed
83: #
84:
85: my $ConnectionType;
86:
87: my %managers; # Ip -> manager names
88:
89: my %perlvar; # Will have the apache conf defined perl vars.
90:
91: #
92: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
93: # Each element of the hash contains a reference to an array that contains:
94: # A reference to a sub that executes the request corresponding to the keyword.
95: # A flag that is true if the request must be encoded to be acceptable.
96: # A mask with bits as follows:
97: # CLIENT_OK - Set when the function is allowed by ordinary clients
98: # MANAGER_OK - Set when the function is allowed to manager clients.
99: #
100: my $CLIENT_OK = 1;
101: my $MANAGER_OK = 2;
102: my %Dispatcher;
103:
104:
105: #
106: # The array below are password error strings."
107: #
108: my $lastpwderror = 13; # Largest error number from lcpasswd.
109: my @passwderrors = ("ok",
110: "pwchange_failure - lcpasswd must be run as user 'www'",
111: "pwchange_failure - lcpasswd got incorrect number of arguments",
112: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
113: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
114: "pwchange_failure - lcpasswd User does not exist.",
115: "pwchange_failure - lcpasswd Incorrect current passwd",
116: "pwchange_failure - lcpasswd Unable to su to root.",
117: "pwchange_failure - lcpasswd Cannot set new passwd.",
118: "pwchange_failure - lcpasswd Username has invalid characters",
119: "pwchange_failure - lcpasswd Invalid characters in password",
120: "pwchange_failure - lcpasswd User already exists",
121: "pwchange_failure - lcpasswd Something went wrong with user addition.",
122: "pwchange_failure - lcpasswd Password mismatch",
123: "pwchange_failure - lcpasswd Error filename is invalid");
124:
125:
126: # The array below are lcuseradd error strings.:
127:
128: my $lastadderror = 13;
129: my @adderrors = ("ok",
130: "User ID mismatch, lcuseradd must run as user www",
131: "lcuseradd Incorrect number of command line parameters must be 3",
132: "lcuseradd Incorrect number of stdinput lines, must be 3",
133: "lcuseradd Too many other simultaneous pwd changes in progress",
134: "lcuseradd User does not exist",
135: "lcuseradd Unable to make www member of users's group",
136: "lcuseradd Unable to su to root",
137: "lcuseradd Unable to set password",
138: "lcuseradd Usrname has invalid characters",
139: "lcuseradd Password has an invalid character",
140: "lcuseradd User already exists",
141: "lcuseradd Could not add user.",
142: "lcuseradd Password mismatch");
143:
144:
145:
146: #
147: # Statistics that are maintained and dislayed in the status line.
148: #
149: my $Transactions = 0; # Number of attempted transactions.
150: my $Failures = 0; # Number of transcations failed.
151:
152: # ResetStatistics:
153: # Resets the statistics counters:
154: #
155: sub ResetStatistics {
156: $Transactions = 0;
157: $Failures = 0;
158: }
159:
160: #------------------------------------------------------------------------
161: #
162: # LocalConnection
163: # Completes the formation of a locally authenticated connection.
164: # This function will ensure that the 'remote' client is really the
165: # local host. If not, the connection is closed, and the function fails.
166: # If so, initcmd is parsed for the name of a file containing the
167: # IDEA session key. The fie is opened, read, deleted and the session
168: # key returned to the caller.
169: #
170: # Parameters:
171: # $Socket - Socket open on client.
172: # $initcmd - The full text of the init command.
173: #
174: # Returns:
175: # IDEA session key on success.
176: # undef on failure.
177: #
178: sub LocalConnection {
179: my ($Socket, $initcmd) = @_;
180: Debug("Attempting local connection: $initcmd client: $clientip");
181: if($clientip ne "127.0.0.1") {
182: &logthis('<font color="red"> LocalConnection rejecting non local: '
183: ."$clientip ne 127.0.0.1 </font>");
184: close $Socket;
185: return undef;
186: } else {
187: chomp($initcmd); # Get rid of \n in filename.
188: my ($init, $type, $name) = split(/:/, $initcmd);
189: Debug(" Init command: $init $type $name ");
190:
191: # Require that $init = init, and $type = local: Otherwise
192: # the caller is insane:
193:
194: if(($init ne "init") && ($type ne "local")) {
195: &logthis('<font color = "red"> LocalConnection: caller is insane! '
196: ."init = $init, and type = $type </font>");
197: close($Socket);;
198: return undef;
199:
200: }
201: # Now get the key filename:
202:
203: my $IDEAKey = lonlocal::ReadKeyFile($name);
204: return $IDEAKey;
205: }
206: }
207: #------------------------------------------------------------------------------
208: #
209: # SSLConnection
210: # Completes the formation of an ssh authenticated connection. The
211: # socket is promoted to an ssl socket. If this promotion and the associated
212: # certificate exchange are successful, the IDEA key is generated and sent
213: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
214: # the caller after the SSL tunnel is torn down.
215: #
216: # Parameters:
217: # Name Type Purpose
218: # $Socket IO::Socket::INET Plaintext socket.
219: #
220: # Returns:
221: # IDEA key on success.
222: # undef on failure.
223: #
224: sub SSLConnection {
225: my $Socket = shift;
226:
227: Debug("SSLConnection: ");
228: my $KeyFile = lonssl::KeyFile();
229: if(!$KeyFile) {
230: my $err = lonssl::LastError();
231: &logthis("<font color=\"red\"> CRITICAL"
232: ."Can't get key file $err </font>");
233: return undef;
234: }
235: my ($CACertificate,
236: $Certificate) = lonssl::CertificateFile();
237:
238:
239: # If any of the key, certificate or certificate authority
240: # certificate filenames are not defined, this can't work.
241:
242: if((!$Certificate) || (!$CACertificate)) {
243: my $err = lonssl::LastError();
244: &logthis("<font color=\"red\"> CRITICAL"
245: ."Can't get certificates: $err </font>");
246:
247: return undef;
248: }
249: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
250:
251: # Indicate to our peer that we can procede with
252: # a transition to ssl authentication:
253:
254: print $Socket "ok:ssl\n";
255:
256: Debug("Approving promotion -> ssl");
257: # And do so:
258:
259: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
260: $CACertificate,
261: $Certificate,
262: $KeyFile);
263: if(! ($SSLSocket) ) { # SSL socket promotion failed.
264: my $err = lonssl::LastError();
265: &logthis("<font color=\"red\"> CRITICAL "
266: ."SSL Socket promotion failed: $err </font>");
267: return undef;
268: }
269: Debug("SSL Promotion successful");
270:
271: #
272: # The only thing we'll use the socket for is to send the IDEA key
273: # to the peer:
274:
275: my $Key = lonlocal::CreateCipherKey();
276: print $SSLSocket "$Key\n";
277:
278: lonssl::Close($SSLSocket);
279:
280: Debug("Key exchange complete: $Key");
281:
282: return $Key;
283: }
284: #
285: # InsecureConnection:
286: # If insecure connections are allowd,
287: # exchange a challenge with the client to 'validate' the
288: # client (not really, but that's the protocol):
289: # We produce a challenge string that's sent to the client.
290: # The client must then echo the challenge verbatim to us.
291: #
292: # Parameter:
293: # Socket - Socket open on the client.
294: # Returns:
295: # 1 - success.
296: # 0 - failure (e.g.mismatch or insecure not allowed).
297: #
298: sub InsecureConnection {
299: my $Socket = shift;
300:
301: # Don't even start if insecure connections are not allowed.
302:
303: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
304: return 0;
305: }
306:
307: # Fabricate a challenge string and send it..
308:
309: my $challenge = "$$".time; # pid + time.
310: print $Socket "$challenge\n";
311: &status("Waiting for challenge reply");
312:
313: my $answer = <$Socket>;
314: $answer =~s/\W//g;
315: if($challenge eq $answer) {
316: return 1;
317: } else {
318: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
319: &status("No challenge reqply");
320: return 0;
321: }
322:
323:
324: }
325: #
326: # Safely execute a command (as long as it's not a shel command and doesn
327: # not require/rely on shell escapes. The function operates by doing a
328: # a pipe based fork and capturing stdout and stderr from the pipe.
329: #
330: # Formal Parameters:
331: # $line - A line of text to be executed as a command.
332: # Returns:
333: # The output from that command. If the output is multiline the caller
334: # must know how to split up the output.
335: #
336: #
337: sub execute_command {
338: my ($line) = @_;
339: my @words = split(/\s/, $line); # Bust the command up into words.
340: my $output = "";
341:
342: my $pid = open(CHILD, "-|");
343:
344: if($pid) { # Parent process
345: Debug("In parent process for execute_command");
346: my @data = <CHILD>; # Read the child's outupt...
347: close CHILD;
348: foreach my $output_line (@data) {
349: Debug("Adding $output_line");
350: $output .= $output_line; # Presumably has a \n on it.
351: }
352:
353: } else { # Child process
354: close (STDERR);
355: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
356: exec(@words); # won't return.
357: }
358: return $output;
359: }
360:
361:
362: # GetCertificate: Given a transaction that requires a certificate,
363: # this function will extract the certificate from the transaction
364: # request. Note that at this point, the only concept of a certificate
365: # is the hostname to which we are connected.
366: #
367: # Parameter:
368: # request - The request sent by our client (this parameterization may
369: # need to change when we really use a certificate granting
370: # authority.
371: #
372: sub GetCertificate {
373: my $request = shift;
374:
375: return $clientip;
376: }
377:
378: #
379: # Return true if client is a manager.
380: #
381: sub isManager {
382: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
383: }
384: #
385: # Return tru if client can do client functions
386: #
387: sub isClient {
388: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
389: }
390:
391:
392: #
393: # ReadManagerTable: Reads in the current manager table. For now this is
394: # done on each manager authentication because:
395: # - These authentications are not frequent
396: # - This allows dynamic changes to the manager table
397: # without the need to signal to the lond.
398: #
399: sub ReadManagerTable {
400:
401: # Clean out the old table first..
402:
403: foreach my $key (keys %managers) {
404: delete $managers{$key};
405: }
406:
407: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
408: if (!open (MANAGERS, $tablename)) {
409: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
410: return;
411: }
412: while(my $host = <MANAGERS>) {
413: chomp($host);
414: if ($host =~ "^#") { # Comment line.
415: next;
416: }
417: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
418: # The entry is of the form:
419: # cluname:hostname
420: # cluname - A 'cluster hostname' is needed in order to negotiate
421: # the host key.
422: # hostname- The dns name of the host.
423: #
424: my($cluname, $dnsname) = split(/:/, $host);
425:
426: my $ip = gethostbyname($dnsname);
427: if(defined($ip)) { # bad names don't deserve entry.
428: my $hostip = inet_ntoa($ip);
429: $managers{$hostip} = $cluname;
430: logthis('<font color="green"> registering manager '.
431: "$dnsname as $cluname with $hostip </font>\n");
432: }
433: } else {
434: logthis('<font color="green"> existing host'." $host</font>\n");
435: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if clumemeber
436: }
437: }
438: }
439:
440: #
441: # ValidManager: Determines if a given certificate represents a valid manager.
442: # in this primitive implementation, the 'certificate' is
443: # just the connecting loncapa client name. This is checked
444: # against a valid client list in the configuration.
445: #
446: #
447: sub ValidManager {
448: my $certificate = shift;
449:
450: return isManager;
451: }
452: #
453: # CopyFile: Called as part of the process of installing a
454: # new configuration file. This function copies an existing
455: # file to a backup file.
456: # Parameters:
457: # oldfile - Name of the file to backup.
458: # newfile - Name of the backup file.
459: # Return:
460: # 0 - Failure (errno has failure reason).
461: # 1 - Success.
462: #
463: sub CopyFile {
464:
465: my ($oldfile, $newfile) = @_;
466:
467: if (! copy($oldfile,$newfile)) {
468: return 0;
469: }
470: chmod(0660, $newfile);
471: return 1;
472: }
473: #
474: # Host files are passed out with externally visible host IPs.
475: # If, for example, we are behind a fire-wall or NAT host, our
476: # internally visible IP may be different than the externally
477: # visible IP. Therefore, we always adjust the contents of the
478: # host file so that the entry for ME is the IP that we believe
479: # we have. At present, this is defined as the entry that
480: # DNS has for us. If by some chance we are not able to get a
481: # DNS translation for us, then we assume that the host.tab file
482: # is correct.
483: # BUGBUGBUG - in the future, we really should see if we can
484: # easily query the interface(s) instead.
485: # Parameter(s):
486: # contents - The contents of the host.tab to check.
487: # Returns:
488: # newcontents - The adjusted contents.
489: #
490: #
491: sub AdjustHostContents {
492: my $contents = shift;
493: my $adjusted;
494: my $me = $perlvar{'lonHostID'};
495:
496: foreach my $line (split(/\n/,$contents)) {
497: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
498: chomp($line);
499: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
500: if ($id eq $me) {
501: my $ip = gethostbyname($name);
502: my $ipnew = inet_ntoa($ip);
503: $ip = $ipnew;
504: # Reconstruct the host line and append to adjusted:
505:
506: my $newline = "$id:$domain:$role:$name:$ip";
507: if($maxcon ne "") { # Not all hosts have loncnew tuning params
508: $newline .= ":$maxcon:$idleto:$mincon";
509: }
510: $adjusted .= $newline."\n";
511:
512: } else { # Not me, pass unmodified.
513: $adjusted .= $line."\n";
514: }
515: } else { # Blank or comment never re-written.
516: $adjusted .= $line."\n"; # Pass blanks and comments as is.
517: }
518: }
519: return $adjusted;
520: }
521: #
522: # InstallFile: Called to install an administrative file:
523: # - The file is created with <name>.tmp
524: # - The <name>.tmp file is then mv'd to <name>
525: # This lugubrious procedure is done to ensure that we are never without
526: # a valid, even if dated, version of the file regardless of who crashes
527: # and when the crash occurs.
528: #
529: # Parameters:
530: # Name of the file
531: # File Contents.
532: # Return:
533: # nonzero - success.
534: # 0 - failure and $! has an errno.
535: #
536: sub InstallFile {
537:
538: my ($Filename, $Contents) = @_;
539: my $TempFile = $Filename.".tmp";
540:
541: # Open the file for write:
542:
543: my $fh = IO::File->new("> $TempFile"); # Write to temp.
544: if(!(defined $fh)) {
545: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
546: return 0;
547: }
548: # write the contents of the file:
549:
550: print $fh ($Contents);
551: $fh->close; # In case we ever have a filesystem w. locking
552:
553: chmod(0660, $TempFile);
554:
555: # Now we can move install the file in position.
556:
557: move($TempFile, $Filename);
558:
559: return 1;
560: }
561:
562:
563: #
564: # ConfigFileFromSelector: converts a configuration file selector
565: # (one of host or domain at this point) into a
566: # configuration file pathname.
567: #
568: # Parameters:
569: # selector - Configuration file selector.
570: # Returns:
571: # Full path to the file or undef if the selector is invalid.
572: #
573: sub ConfigFileFromSelector {
574: my $selector = shift;
575: my $tablefile;
576:
577: my $tabledir = $perlvar{'lonTabDir'}.'/';
578: if ($selector eq "hosts") {
579: $tablefile = $tabledir."hosts.tab";
580: } elsif ($selector eq "domain") {
581: $tablefile = $tabledir."domain.tab";
582: } else {
583: return undef;
584: }
585: return $tablefile;
586:
587: }
588: #
589: # PushFile: Called to do an administrative push of a file.
590: # - Ensure the file being pushed is one we support.
591: # - Backup the old file to <filename.saved>
592: # - Separate the contents of the new file out from the
593: # rest of the request.
594: # - Write the new file.
595: # Parameter:
596: # Request - The entire user request. This consists of a : separated
597: # string pushfile:tablename:contents.
598: # NOTE: The contents may have :'s in it as well making things a bit
599: # more interesting... but not much.
600: # Returns:
601: # String to send to client ("ok" or "refused" if bad file).
602: #
603: sub PushFile {
604: my $request = shift;
605: my ($command, $filename, $contents) = split(":", $request, 3);
606:
607: # At this point in time, pushes for only the following tables are
608: # supported:
609: # hosts.tab ($filename eq host).
610: # domain.tab ($filename eq domain).
611: # Construct the destination filename or reject the request.
612: #
613: # lonManage is supposed to ensure this, however this session could be
614: # part of some elaborate spoof that managed somehow to authenticate.
615: #
616:
617:
618: my $tablefile = ConfigFileFromSelector($filename);
619: if(! (defined $tablefile)) {
620: return "refused";
621: }
622: #
623: # >copy< the old table to the backup table
624: # don't rename in case system crashes/reboots etc. in the time
625: # window between a rename and write.
626: #
627: my $backupfile = $tablefile;
628: $backupfile =~ s/\.tab$/.old/;
629: if(!CopyFile($tablefile, $backupfile)) {
630: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
631: return "error:$!";
632: }
633: &logthis('<font color="green"> Pushfile: backed up '
634: .$tablefile." to $backupfile</font>");
635:
636: # If the file being pushed is the host file, we adjust the entry for ourself so that the
637: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
638: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
639: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
640: # that possibilty.
641:
642: if($filename eq "host") {
643: $contents = AdjustHostContents($contents);
644: }
645:
646: # Install the new file:
647:
648: if(!InstallFile($tablefile, $contents)) {
649: &logthis('<font color="red"> Pushfile: unable to install '
650: .$tablefile." $! </font>");
651: return "error:$!";
652: } else {
653: &logthis('<font color="green"> Installed new '.$tablefile
654: ."</font>");
655:
656: }
657:
658:
659: # Indicate success:
660:
661: return "ok";
662:
663: }
664:
665: #
666: # Called to re-init either lonc or lond.
667: #
668: # Parameters:
669: # request - The full request by the client. This is of the form
670: # reinit:<process>
671: # where <process> is allowed to be either of
672: # lonc or lond
673: #
674: # Returns:
675: # The string to be sent back to the client either:
676: # ok - Everything worked just fine.
677: # error:why - There was a failure and why describes the reason.
678: #
679: #
680: sub ReinitProcess {
681: my $request = shift;
682:
683:
684: # separate the request (reinit) from the process identifier and
685: # validate it producing the name of the .pid file for the process.
686: #
687: #
688: my ($junk, $process) = split(":", $request);
689: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
690: if($process eq 'lonc') {
691: $processpidfile = $processpidfile."lonc.pid";
692: if (!open(PIDFILE, "< $processpidfile")) {
693: return "error:Open failed for $processpidfile";
694: }
695: my $loncpid = <PIDFILE>;
696: close(PIDFILE);
697: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
698: ."</font>");
699: kill("USR2", $loncpid);
700: } elsif ($process eq 'lond') {
701: logthis('<font color="red"> Reinitializing self (lond) </font>');
702: &UpdateHosts; # Lond is us!!
703: } else {
704: &logthis('<font color="yellow" Invalid reinit request for '.$process
705: ."</font>");
706: return "error:Invalid process identifier $process";
707: }
708: return 'ok';
709: }
710: # Validate a line in a configuration file edit script:
711: # Validation includes:
712: # - Ensuring the command is valid.
713: # - Ensuring the command has sufficient parameters
714: # Parameters:
715: # scriptline - A line to validate (\n has been stripped for what it's worth).
716: #
717: # Return:
718: # 0 - Invalid scriptline.
719: # 1 - Valid scriptline
720: # NOTE:
721: # Only the command syntax is checked, not the executability of the
722: # command.
723: #
724: sub isValidEditCommand {
725: my $scriptline = shift;
726:
727: # Line elements are pipe separated:
728:
729: my ($command, $key, $newline) = split(/\|/, $scriptline);
730: &logthis('<font color="green"> isValideditCommand checking: '.
731: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
732:
733: if ($command eq "delete") {
734: #
735: # key with no newline.
736: #
737: if( ($key eq "") || ($newline ne "")) {
738: return 0; # Must have key but no newline.
739: } else {
740: return 1; # Valid syntax.
741: }
742: } elsif ($command eq "replace") {
743: #
744: # key and newline:
745: #
746: if (($key eq "") || ($newline eq "")) {
747: return 0;
748: } else {
749: return 1;
750: }
751: } elsif ($command eq "append") {
752: if (($key ne "") && ($newline eq "")) {
753: return 1;
754: } else {
755: return 0;
756: }
757: } else {
758: return 0; # Invalid command.
759: }
760: return 0; # Should not get here!!!
761: }
762: #
763: # ApplyEdit - Applies an edit command to a line in a configuration
764: # file. It is the caller's responsiblity to validate the
765: # edit line.
766: # Parameters:
767: # $directive - A single edit directive to apply.
768: # Edit directives are of the form:
769: # append|newline - Appends a new line to the file.
770: # replace|key|newline - Replaces the line with key value 'key'
771: # delete|key - Deletes the line with key value 'key'.
772: # $editor - A config file editor object that contains the
773: # file being edited.
774: #
775: sub ApplyEdit {
776:
777: my ($directive, $editor) = @_;
778:
779: # Break the directive down into its command and its parameters
780: # (at most two at this point. The meaning of the parameters, if in fact
781: # they exist depends on the command).
782:
783: my ($command, $p1, $p2) = split(/\|/, $directive);
784:
785: if($command eq "append") {
786: $editor->Append($p1); # p1 - key p2 null.
787: } elsif ($command eq "replace") {
788: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
789: } elsif ($command eq "delete") {
790: $editor->DeleteLine($p1); # p1 - key p2 null.
791: } else { # Should not get here!!!
792: die "Invalid command given to ApplyEdit $command"
793: }
794: }
795: #
796: # AdjustOurHost:
797: # Adjusts a host file stored in a configuration file editor object
798: # for the true IP address of this host. This is necessary for hosts
799: # that live behind a firewall.
800: # Those hosts have a publicly distributed IP of the firewall, but
801: # internally must use their actual IP. We assume that a given
802: # host only has a single IP interface for now.
803: # Formal Parameters:
804: # editor - The configuration file editor to adjust. This
805: # editor is assumed to contain a hosts.tab file.
806: # Strategy:
807: # - Figure out our hostname.
808: # - Lookup the entry for this host.
809: # - Modify the line to contain our IP
810: # - Do a replace for this host.
811: sub AdjustOurHost {
812: my $editor = shift;
813:
814: # figure out who I am.
815:
816: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
817:
818: # Get my host file entry.
819:
820: my $ConfigLine = $editor->Find($myHostName);
821: if(! (defined $ConfigLine)) {
822: die "AdjustOurHost - no entry for me in hosts file $myHostName";
823: }
824: # figure out my IP:
825: # Use the config line to get my hostname.
826: # Use gethostbyname to translate that into an IP address.
827: #
828: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
829: #
830: # Reassemble the config line from the elements in the list.
831: # Note that if the loncnew items were not present before, they will
832: # be now even if they would be empty
833: #
834: my $newConfigLine = $id;
835: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
836: $newConfigLine .= ":".$item;
837: }
838: # Replace the line:
839:
840: $editor->ReplaceLine($id, $newConfigLine);
841:
842: }
843: #
844: # ReplaceConfigFile:
845: # Replaces a configuration file with the contents of a
846: # configuration file editor object.
847: # This is done by:
848: # - Copying the target file to <filename>.old
849: # - Writing the new file to <filename>.tmp
850: # - Moving <filename.tmp> -> <filename>
851: # This laborious process ensures that the system is never without
852: # a configuration file that's at least valid (even if the contents
853: # may be dated).
854: # Parameters:
855: # filename - Name of the file to modify... this is a full path.
856: # editor - Editor containing the file.
857: #
858: sub ReplaceConfigFile {
859:
860: my ($filename, $editor) = @_;
861:
862: CopyFile ($filename, $filename.".old");
863:
864: my $contents = $editor->Get(); # Get the contents of the file.
865:
866: InstallFile($filename, $contents);
867: }
868: #
869: #
870: # Called to edit a configuration table file
871: # Parameters:
872: # request - The entire command/request sent by lonc or lonManage
873: # Return:
874: # The reply to send to the client.
875: #
876: sub EditFile {
877: my $request = shift;
878:
879: # Split the command into it's pieces: edit:filetype:script
880:
881: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
882:
883: # Check the pre-coditions for success:
884:
885: if($cmd != "edit") { # Something is amiss afoot alack.
886: return "error:edit request detected, but request != 'edit'\n";
887: }
888: if( ($filetype ne "hosts") &&
889: ($filetype ne "domain")) {
890: return "error:edit requested with invalid file specifier: $filetype \n";
891: }
892:
893: # Split the edit script and check it's validity.
894:
895: my @scriptlines = split(/\n/, $script); # one line per element.
896: my $linecount = scalar(@scriptlines);
897: for(my $i = 0; $i < $linecount; $i++) {
898: chomp($scriptlines[$i]);
899: if(!isValidEditCommand($scriptlines[$i])) {
900: return "error:edit with bad script line: '$scriptlines[$i]' \n";
901: }
902: }
903:
904: # Execute the edit operation.
905: # - Create a config file editor for the appropriate file and
906: # - execute each command in the script:
907: #
908: my $configfile = ConfigFileFromSelector($filetype);
909: if (!(defined $configfile)) {
910: return "refused\n";
911: }
912: my $editor = ConfigFileEdit->new($configfile);
913:
914: for (my $i = 0; $i < $linecount; $i++) {
915: ApplyEdit($scriptlines[$i], $editor);
916: }
917: # If the file is the host file, ensure that our host is
918: # adjusted to have our ip:
919: #
920: if($filetype eq "host") {
921: AdjustOurHost($editor);
922: }
923: # Finally replace the current file with our file.
924: #
925: ReplaceConfigFile($configfile, $editor);
926:
927: return "ok\n";
928: }
929:
930: # read_profile
931: #
932: # Returns a set of specific entries from a user's profile file.
933: # this is a utility function that is used by both get_profile_entry and
934: # get_profile_entry_encrypted.
935: #
936: # Parameters:
937: # udom - Domain in which the user exists.
938: # uname - User's account name (loncapa account)
939: # namespace - The profile namespace to open.
940: # what - A set of & separated queries.
941: # Returns:
942: # If all ok: - The string that needs to be shipped back to the user.
943: # If failure - A string that starts with error: followed by the failure
944: # reason.. note that this probabyl gets shipped back to the
945: # user as well.
946: #
947: sub read_profile {
948: my ($udom, $uname, $namespace, $what) = @_;
949:
950: my $hashref = &tie_user_hash($udom, $uname, $namespace,
951: &GDBM_READER());
952: if ($hashref) {
953: my @queries=split(/\&/,$what);
954: my $qresult='';
955:
956: for (my $i=0;$i<=$#queries;$i++) {
957: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
958: }
959: $qresult=~s/\&$//; # Remove trailing & from last lookup.
960: if (&untie_user_hash($hashref)) {
961: return $qresult;
962: } else {
963: return "error: ".($!+0)." untie (GDBM) Failed";
964: }
965: } else {
966: if ($!+0 == 2) {
967: return "error:No such file or GDBM reported bad block error";
968: } else {
969: return "error: ".($!+0)." tie (GDBM) Failed";
970: }
971: }
972:
973: }
974: #--------------------- Request Handlers --------------------------------------------
975: #
976: # By convention each request handler registers itself prior to the sub
977: # declaration:
978: #
979:
980: #++
981: #
982: # Handles ping requests.
983: # Parameters:
984: # $cmd - the actual keyword that invoked us.
985: # $tail - the tail of the request that invoked us.
986: # $replyfd- File descriptor connected to the client
987: # Implicit Inputs:
988: # $currenthostid - Global variable that carries the name of the host we are
989: # known as.
990: # Returns:
991: # 1 - Ok to continue processing.
992: # 0 - Program should exit.
993: # Side effects:
994: # Reply information is sent to the client.
995: sub ping_handler {
996: my ($cmd, $tail, $client) = @_;
997: Debug("$cmd $tail $client .. $currenthostid:");
998:
999: Reply( $client,"$currenthostid\n","$cmd:$tail");
1000:
1001: return 1;
1002: }
1003: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1004:
1005: #++
1006: #
1007: # Handles pong requests. Pong replies with our current host id, and
1008: # the results of a ping sent to us via our lonc.
1009: #
1010: # Parameters:
1011: # $cmd - the actual keyword that invoked us.
1012: # $tail - the tail of the request that invoked us.
1013: # $replyfd- File descriptor connected to the client
1014: # Implicit Inputs:
1015: # $currenthostid - Global variable that carries the name of the host we are
1016: # connected to.
1017: # Returns:
1018: # 1 - Ok to continue processing.
1019: # 0 - Program should exit.
1020: # Side effects:
1021: # Reply information is sent to the client.
1022: sub pong_handler {
1023: my ($cmd, $tail, $replyfd) = @_;
1024:
1025: my $reply=&Apache::lonnet::reply("ping",$clientname);
1026: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1027: return 1;
1028: }
1029: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1030:
1031: #++
1032: # Called to establish an encrypted session key with the remote client.
1033: # Note that with secure lond, in most cases this function is never
1034: # invoked. Instead, the secure session key is established either
1035: # via a local file that's locked down tight and only lives for a short
1036: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1037: # bits from /dev/urandom, rather than the predictable pattern used by
1038: # by this sub. This sub is only used in the old-style insecure
1039: # key negotiation.
1040: # Parameters:
1041: # $cmd - the actual keyword that invoked us.
1042: # $tail - the tail of the request that invoked us.
1043: # $replyfd- File descriptor connected to the client
1044: # Implicit Inputs:
1045: # $currenthostid - Global variable that carries the name of the host
1046: # known as.
1047: # $clientname - Global variable that carries the name of the hsot we're connected to.
1048: # Returns:
1049: # 1 - Ok to continue processing.
1050: # 0 - Program should exit.
1051: # Implicit Outputs:
1052: # Reply information is sent to the client.
1053: # $cipher is set with a reference to a new IDEA encryption object.
1054: #
1055: sub establish_key_handler {
1056: my ($cmd, $tail, $replyfd) = @_;
1057:
1058: my $buildkey=time.$$.int(rand 100000);
1059: $buildkey=~tr/1-6/A-F/;
1060: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1061: my $key=$currenthostid.$clientname;
1062: $key=~tr/a-z/A-Z/;
1063: $key=~tr/G-P/0-9/;
1064: $key=~tr/Q-Z/0-9/;
1065: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1066: $key=substr($key,0,32);
1067: my $cipherkey=pack("H32",$key);
1068: $cipher=new IDEA $cipherkey;
1069: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1070:
1071: return 1;
1072:
1073: }
1074: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1075:
1076: # Handler for the load command. Returns the current system load average
1077: # to the requestor.
1078: #
1079: # Parameters:
1080: # $cmd - the actual keyword that invoked us.
1081: # $tail - the tail of the request that invoked us.
1082: # $replyfd- File descriptor connected to the client
1083: # Implicit Inputs:
1084: # $currenthostid - Global variable that carries the name of the host
1085: # known as.
1086: # $clientname - Global variable that carries the name of the hsot we're connected to.
1087: # Returns:
1088: # 1 - Ok to continue processing.
1089: # 0 - Program should exit.
1090: # Side effects:
1091: # Reply information is sent to the client.
1092: sub load_handler {
1093: my ($cmd, $tail, $replyfd) = @_;
1094:
1095: # Get the load average from /proc/loadavg and calculate it as a percentage of
1096: # the allowed load limit as set by the perl global variable lonLoadLim
1097:
1098: my $loadavg;
1099: my $loadfile=IO::File->new('/proc/loadavg');
1100:
1101: $loadavg=<$loadfile>;
1102: $loadavg =~ s/\s.*//g; # Extract the first field only.
1103:
1104: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1105:
1106: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1107:
1108: return 1;
1109: }
1110: ®ister_handler("load", \&load_handler, 0, 1, 0);
1111:
1112: #
1113: # Process the userload request. This sub returns to the client the current
1114: # user load average. It can be invoked either by clients or managers.
1115: #
1116: # Parameters:
1117: # $cmd - the actual keyword that invoked us.
1118: # $tail - the tail of the request that invoked us.
1119: # $replyfd- File descriptor connected to the client
1120: # Implicit Inputs:
1121: # $currenthostid - Global variable that carries the name of the host
1122: # known as.
1123: # $clientname - Global variable that carries the name of the hsot we're connected to.
1124: # Returns:
1125: # 1 - Ok to continue processing.
1126: # 0 - Program should exit
1127: # Implicit inputs:
1128: # whatever the userload() function requires.
1129: # Implicit outputs:
1130: # the reply is written to the client.
1131: #
1132: sub user_load_handler {
1133: my ($cmd, $tail, $replyfd) = @_;
1134:
1135: my $userloadpercent=&Apache::lonnet::userload();
1136: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1137:
1138: return 1;
1139: }
1140: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1141:
1142: # Process a request for the authorization type of a user:
1143: # (userauth).
1144: #
1145: # Parameters:
1146: # $cmd - the actual keyword that invoked us.
1147: # $tail - the tail of the request that invoked us.
1148: # $replyfd- File descriptor connected to the client
1149: # Returns:
1150: # 1 - Ok to continue processing.
1151: # 0 - Program should exit
1152: # Implicit outputs:
1153: # The user authorization type is written to the client.
1154: #
1155: sub user_authorization_type {
1156: my ($cmd, $tail, $replyfd) = @_;
1157:
1158: my $userinput = "$cmd:$tail";
1159:
1160: # Pull the domain and username out of the command tail.
1161: # and call get_auth_type to determine the authentication type.
1162:
1163: my ($udom,$uname)=split(/:/,$tail);
1164: my $result = &get_auth_type($udom, $uname);
1165: if($result eq "nouser") {
1166: &Failure( $replyfd, "unknown_user\n", $userinput);
1167: } else {
1168: #
1169: # We only want to pass the second field from get_auth_type
1170: # for ^krb.. otherwise we'll be handing out the encrypted
1171: # password for internals e.g.
1172: #
1173: my ($type,$otherinfo) = split(/:/,$result);
1174: if($type =~ /^krb/) {
1175: $type = $result;
1176: } else {
1177: $type .= ':';
1178: }
1179: &Reply( $replyfd, "$type\n", $userinput);
1180: }
1181:
1182: return 1;
1183: }
1184: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1185:
1186: # Process a request by a manager to push a hosts or domain table
1187: # to us. We pick apart the command and pass it on to the subs
1188: # that already exist to do this.
1189: #
1190: # Parameters:
1191: # $cmd - the actual keyword that invoked us.
1192: # $tail - the tail of the request that invoked us.
1193: # $client - File descriptor connected to the client
1194: # Returns:
1195: # 1 - Ok to continue processing.
1196: # 0 - Program should exit
1197: # Implicit Output:
1198: # a reply is written to the client.
1199: sub push_file_handler {
1200: my ($cmd, $tail, $client) = @_;
1201:
1202: my $userinput = "$cmd:$tail";
1203:
1204: # At this time we only know that the IP of our partner is a valid manager
1205: # the code below is a hook to do further authentication (e.g. to resolve
1206: # spoofing).
1207:
1208: my $cert = &GetCertificate($userinput);
1209: if(&ValidManager($cert)) {
1210:
1211: # Now presumably we have the bona fides of both the peer host and the
1212: # process making the request.
1213:
1214: my $reply = &PushFile($userinput);
1215: &Reply($client, "$reply\n", $userinput);
1216:
1217: } else {
1218: &Failure( $client, "refused\n", $userinput);
1219: }
1220: return 1;
1221: }
1222: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1223:
1224: #
1225: # du - list the disk usuage of a directory recursively.
1226: #
1227: # note: stolen code from the ls file handler
1228: # under construction by Rick Banghart
1229: # .
1230: # Parameters:
1231: # $cmd - The command that dispatched us (du).
1232: # $ududir - The directory path to list... I'm not sure what this
1233: # is relative as things like ls:. return e.g.
1234: # no_such_dir.
1235: # $client - Socket open on the client.
1236: # Returns:
1237: # 1 - indicating that the daemon should not disconnect.
1238: # Side Effects:
1239: # The reply is written to $client.
1240: #
1241: sub du_handler {
1242: my ($cmd, $ududir, $client) = @_;
1243: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1244: my $userinput = "$cmd:$ududir";
1245:
1246: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1247: &Failure($client,"refused\n","$cmd:$ududir");
1248: return 1;
1249: }
1250: # Since $ududir could have some nasties in it,
1251: # we will require that ududir is a valid
1252: # directory. Just in case someone tries to
1253: # slip us a line like .;(cd /home/httpd rm -rf*)
1254: # etc.
1255: #
1256: if (-d $ududir) {
1257: my $total_size=0;
1258: my $code=sub {
1259: if ($_=~/\.\d+\./) { return;}
1260: if ($_=~/\.meta$/) { return;}
1261: if (-d $_) { return;}
1262: $total_size+=(stat($_))[7];
1263: };
1264: chdir($ududir);
1265: find($code,$ududir);
1266: $total_size=int($total_size/1024);
1267: &Reply($client,"$total_size\n","$cmd:$ududir");
1268: } else {
1269: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1270: }
1271: return 1;
1272: }
1273: ®ister_handler("du", \&du_handler, 0, 1, 0);
1274:
1275: #
1276: # The ls_handler routine should be considered obosolete and is retained
1277: # for communication with legacy servers. Please see the ls2_handler.
1278: #
1279: # ls - list the contents of a directory. For each file in the
1280: # selected directory the filename followed by the full output of
1281: # the stat function is returned. The returned info for each
1282: # file are separated by ':'. The stat fields are separated by &'s.
1283: # Parameters:
1284: # $cmd - The command that dispatched us (ls).
1285: # $ulsdir - The directory path to list... I'm not sure what this
1286: # is relative as things like ls:. return e.g.
1287: # no_such_dir.
1288: # $client - Socket open on the client.
1289: # Returns:
1290: # 1 - indicating that the daemon should not disconnect.
1291: # Side Effects:
1292: # The reply is written to $client.
1293: #
1294: sub ls_handler {
1295: # obsoleted by ls2_handler
1296: my ($cmd, $ulsdir, $client) = @_;
1297:
1298: my $userinput = "$cmd:$ulsdir";
1299:
1300: my $obs;
1301: my $rights;
1302: my $ulsout='';
1303: my $ulsfn;
1304: if (-e $ulsdir) {
1305: if(-d $ulsdir) {
1306: if (opendir(LSDIR,$ulsdir)) {
1307: while ($ulsfn=readdir(LSDIR)) {
1308: undef($obs);
1309: undef($rights);
1310: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1311: #We do some obsolete checking here
1312: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1313: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1314: my @obsolete=<FILE>;
1315: foreach my $obsolete (@obsolete) {
1316: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1317: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1318: }
1319: }
1320: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1321: if($obs eq '1') { $ulsout.="&1"; }
1322: else { $ulsout.="&0"; }
1323: if($rights eq '1') { $ulsout.="&1:"; }
1324: else { $ulsout.="&0:"; }
1325: }
1326: closedir(LSDIR);
1327: }
1328: } else {
1329: my @ulsstats=stat($ulsdir);
1330: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1331: }
1332: } else {
1333: $ulsout='no_such_dir';
1334: }
1335: if ($ulsout eq '') { $ulsout='empty'; }
1336: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1337:
1338: return 1;
1339:
1340: }
1341: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1342:
1343: #
1344: # Please also see the ls_handler, which this routine obosolets.
1345: # ls2_handler differs from ls_handler in that it escapes its return
1346: # values before concatenating them together with ':'s.
1347: #
1348: # ls2 - list the contents of a directory. For each file in the
1349: # selected directory the filename followed by the full output of
1350: # the stat function is returned. The returned info for each
1351: # file are separated by ':'. The stat fields are separated by &'s.
1352: # Parameters:
1353: # $cmd - The command that dispatched us (ls).
1354: # $ulsdir - The directory path to list... I'm not sure what this
1355: # is relative as things like ls:. return e.g.
1356: # no_such_dir.
1357: # $client - Socket open on the client.
1358: # Returns:
1359: # 1 - indicating that the daemon should not disconnect.
1360: # Side Effects:
1361: # The reply is written to $client.
1362: #
1363: sub ls2_handler {
1364: my ($cmd, $ulsdir, $client) = @_;
1365:
1366: my $userinput = "$cmd:$ulsdir";
1367:
1368: my $obs;
1369: my $rights;
1370: my $ulsout='';
1371: my $ulsfn;
1372: if (-e $ulsdir) {
1373: if(-d $ulsdir) {
1374: if (opendir(LSDIR,$ulsdir)) {
1375: while ($ulsfn=readdir(LSDIR)) {
1376: undef($obs);
1377: undef($rights);
1378: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1379: #We do some obsolete checking here
1380: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1381: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1382: my @obsolete=<FILE>;
1383: foreach my $obsolete (@obsolete) {
1384: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1385: if($obsolete =~ m|(<copyright>)(default)|) {
1386: $rights = 1;
1387: }
1388: }
1389: }
1390: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1391: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1392: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1393: $ulsout.= &escape($tmp).':';
1394: }
1395: closedir(LSDIR);
1396: }
1397: } else {
1398: my @ulsstats=stat($ulsdir);
1399: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1400: }
1401: } else {
1402: $ulsout='no_such_dir';
1403: }
1404: if ($ulsout eq '') { $ulsout='empty'; }
1405: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1406: return 1;
1407: }
1408: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1409:
1410: # Process a reinit request. Reinit requests that either
1411: # lonc or lond be reinitialized so that an updated
1412: # host.tab or domain.tab can be processed.
1413: #
1414: # Parameters:
1415: # $cmd - the actual keyword that invoked us.
1416: # $tail - the tail of the request that invoked us.
1417: # $client - File descriptor connected to the client
1418: # Returns:
1419: # 1 - Ok to continue processing.
1420: # 0 - Program should exit
1421: # Implicit output:
1422: # a reply is sent to the client.
1423: #
1424: sub reinit_process_handler {
1425: my ($cmd, $tail, $client) = @_;
1426:
1427: my $userinput = "$cmd:$tail";
1428:
1429: my $cert = &GetCertificate($userinput);
1430: if(&ValidManager($cert)) {
1431: chomp($userinput);
1432: my $reply = &ReinitProcess($userinput);
1433: &Reply( $client, "$reply\n", $userinput);
1434: } else {
1435: &Failure( $client, "refused\n", $userinput);
1436: }
1437: return 1;
1438: }
1439: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1440:
1441: # Process the editing script for a table edit operation.
1442: # the editing operation must be encrypted and requested by
1443: # a manager host.
1444: #
1445: # Parameters:
1446: # $cmd - the actual keyword that invoked us.
1447: # $tail - the tail of the request that invoked us.
1448: # $client - File descriptor connected to the client
1449: # Returns:
1450: # 1 - Ok to continue processing.
1451: # 0 - Program should exit
1452: # Implicit output:
1453: # a reply is sent to the client.
1454: #
1455: sub edit_table_handler {
1456: my ($command, $tail, $client) = @_;
1457:
1458: my $userinput = "$command:$tail";
1459:
1460: my $cert = &GetCertificate($userinput);
1461: if(&ValidManager($cert)) {
1462: my($filetype, $script) = split(/:/, $tail);
1463: if (($filetype eq "hosts") ||
1464: ($filetype eq "domain")) {
1465: if($script ne "") {
1466: &Reply($client, # BUGBUG - EditFile
1467: &EditFile($userinput), # could fail.
1468: $userinput);
1469: } else {
1470: &Failure($client,"refused\n",$userinput);
1471: }
1472: } else {
1473: &Failure($client,"refused\n",$userinput);
1474: }
1475: } else {
1476: &Failure($client,"refused\n",$userinput);
1477: }
1478: return 1;
1479: }
1480: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1481:
1482: #
1483: # Authenticate a user against the LonCAPA authentication
1484: # database. Note that there are several authentication
1485: # possibilities:
1486: # - unix - The user can be authenticated against the unix
1487: # password file.
1488: # - internal - The user can be authenticated against a purely
1489: # internal per user password file.
1490: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1491: # ticket granting authority.
1492: # - user - The person tailoring LonCAPA can supply a user authentication
1493: # mechanism that is per system.
1494: #
1495: # Parameters:
1496: # $cmd - The command that got us here.
1497: # $tail - Tail of the command (remaining parameters).
1498: # $client - File descriptor connected to client.
1499: # Returns
1500: # 0 - Requested to exit, caller should shut down.
1501: # 1 - Continue processing.
1502: # Implicit inputs:
1503: # The authentication systems describe above have their own forms of implicit
1504: # input into the authentication process that are described above.
1505: #
1506: sub authenticate_handler {
1507: my ($cmd, $tail, $client) = @_;
1508:
1509:
1510: # Regenerate the full input line
1511:
1512: my $userinput = $cmd.":".$tail;
1513:
1514: # udom - User's domain.
1515: # uname - Username.
1516: # upass - User's password.
1517:
1518: my ($udom,$uname,$upass)=split(/:/,$tail);
1519: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1520: chomp($upass);
1521: $upass=&unescape($upass);
1522:
1523: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1524: if($pwdcorrect) {
1525: &Reply( $client, "authorized\n", $userinput);
1526: #
1527: # Bad credentials: Failed to authorize
1528: #
1529: } else {
1530: &Failure( $client, "non_authorized\n", $userinput);
1531: }
1532:
1533: return 1;
1534: }
1535: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1536:
1537: #
1538: # Change a user's password. Note that this function is complicated by
1539: # the fact that a user may be authenticated in more than one way:
1540: # At present, we are not able to change the password for all types of
1541: # authentication methods. Only for:
1542: # unix - unix password or shadow passoword style authentication.
1543: # local - Locally written authentication mechanism.
1544: # For now, kerb4 and kerb5 password changes are not supported and result
1545: # in an error.
1546: # FUTURE WORK:
1547: # Support kerberos passwd changes?
1548: # Parameters:
1549: # $cmd - The command that got us here.
1550: # $tail - Tail of the command (remaining parameters).
1551: # $client - File descriptor connected to client.
1552: # Returns
1553: # 0 - Requested to exit, caller should shut down.
1554: # 1 - Continue processing.
1555: # Implicit inputs:
1556: # The authentication systems describe above have their own forms of implicit
1557: # input into the authentication process that are described above.
1558: sub change_password_handler {
1559: my ($cmd, $tail, $client) = @_;
1560:
1561: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1562:
1563: #
1564: # udom - user's domain.
1565: # uname - Username.
1566: # upass - Current password.
1567: # npass - New password.
1568: # context - Context in which this was called
1569: # (preferences or reset_by_email).
1570:
1571: my ($udom,$uname,$upass,$npass,$context)=split(/:/,$tail);
1572:
1573: $upass=&unescape($upass);
1574: $npass=&unescape($npass);
1575: &Debug("Trying to change password for $uname");
1576:
1577: # First require that the user can be authenticated with their
1578: # old password unless context was 'reset_by_email':
1579:
1580: my $validated;
1581: if ($context eq 'reset_by_email') {
1582: $validated = 1;
1583: } else {
1584: $validated = &validate_user($udom, $uname, $upass);
1585: }
1586: if($validated) {
1587: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1588:
1589: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1590: if ($howpwd eq 'internal') {
1591: &Debug("internal auth");
1592: my $salt=time;
1593: $salt=substr($salt,6,2);
1594: my $ncpass=crypt($npass,$salt);
1595: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1596: &logthis("Result of password change for "
1597: ."$uname: pwchange_success");
1598: &Reply($client, "ok\n", $userinput);
1599: } else {
1600: &logthis("Unable to open $uname passwd "
1601: ."to change password");
1602: &Failure( $client, "non_authorized\n",$userinput);
1603: }
1604: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1605: my $result = &change_unix_password($uname, $npass);
1606: &logthis("Result of password change for $uname: ".
1607: $result);
1608: &Reply($client, "$result\n", $userinput);
1609: } else {
1610: # this just means that the current password mode is not
1611: # one we know how to change (e.g the kerberos auth modes or
1612: # locally written auth handler).
1613: #
1614: &Failure( $client, "auth_mode_error\n", $userinput);
1615: }
1616:
1617: } else {
1618: &Failure( $client, "non_authorized\n", $userinput);
1619: }
1620:
1621: return 1;
1622: }
1623: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1624:
1625: #
1626: # Create a new user. User in this case means a lon-capa user.
1627: # The user must either already exist in some authentication realm
1628: # like kerberos or the /etc/passwd. If not, a user completely local to
1629: # this loncapa system is created.
1630: #
1631: # Parameters:
1632: # $cmd - The command that got us here.
1633: # $tail - Tail of the command (remaining parameters).
1634: # $client - File descriptor connected to client.
1635: # Returns
1636: # 0 - Requested to exit, caller should shut down.
1637: # 1 - Continue processing.
1638: # Implicit inputs:
1639: # The authentication systems describe above have their own forms of implicit
1640: # input into the authentication process that are described above.
1641: sub add_user_handler {
1642:
1643: my ($cmd, $tail, $client) = @_;
1644:
1645:
1646: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1647: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1648:
1649: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1650:
1651:
1652: if($udom eq $currentdomainid) { # Reject new users for other domains...
1653:
1654: my $oldumask=umask(0077);
1655: chomp($npass);
1656: $npass=&unescape($npass);
1657: my $passfilename = &password_path($udom, $uname);
1658: &Debug("Password file created will be:".$passfilename);
1659: if (-e $passfilename) {
1660: &Failure( $client, "already_exists\n", $userinput);
1661: } else {
1662: my $fperror='';
1663: if (!&mkpath($passfilename)) {
1664: $fperror="error: ".($!+0)." mkdir failed while attempting "
1665: ."makeuser";
1666: }
1667: unless ($fperror) {
1668: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1669: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1670: } else {
1671: &Failure($client, "$fperror\n", $userinput);
1672: }
1673: }
1674: umask($oldumask);
1675: } else {
1676: &Failure($client, "not_right_domain\n",
1677: $userinput); # Even if we are multihomed.
1678:
1679: }
1680: return 1;
1681:
1682: }
1683: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1684:
1685: #
1686: # Change the authentication method of a user. Note that this may
1687: # also implicitly change the user's password if, for example, the user is
1688: # joining an existing authentication realm. Known authentication realms at
1689: # this time are:
1690: # internal - Purely internal password file (only loncapa knows this user)
1691: # local - Institutionally written authentication module.
1692: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1693: # kerb4 - kerberos version 4
1694: # kerb5 - kerberos version 5
1695: #
1696: # Parameters:
1697: # $cmd - The command that got us here.
1698: # $tail - Tail of the command (remaining parameters).
1699: # $client - File descriptor connected to client.
1700: # Returns
1701: # 0 - Requested to exit, caller should shut down.
1702: # 1 - Continue processing.
1703: # Implicit inputs:
1704: # The authentication systems describe above have their own forms of implicit
1705: # input into the authentication process that are described above.
1706: # NOTE:
1707: # This is also used to change the authentication credential values (e.g. passwd).
1708: #
1709: #
1710: sub change_authentication_handler {
1711:
1712: my ($cmd, $tail, $client) = @_;
1713:
1714: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1715:
1716: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1717: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1718: if ($udom ne $currentdomainid) {
1719: &Failure( $client, "not_right_domain\n", $client);
1720: } else {
1721:
1722: chomp($npass);
1723:
1724: $npass=&unescape($npass);
1725: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1726: my $passfilename = &password_path($udom, $uname);
1727: if ($passfilename) { # Not allowed to create a new user!!
1728: # If just changing the unix passwd. need to arrange to run
1729: # passwd since otherwise make_passwd_file will run
1730: # lcuseradd which fails if an account already exists
1731: # (to prevent an unscrupulous LONCAPA admin from stealing
1732: # an existing account by overwriting it as a LonCAPA account).
1733:
1734: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1735: my $result = &change_unix_password($uname, $npass);
1736: &logthis("Result of password change for $uname: ".$result);
1737: if ($result eq "ok") {
1738: &Reply($client, "$result\n")
1739: } else {
1740: &Failure($client, "$result\n");
1741: }
1742: } else {
1743: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1744: #
1745: # If the current auth mode is internal, and the old auth mode was
1746: # unix, or krb*, and the user is an author for this domain,
1747: # re-run manage_permissions for that role in order to be able
1748: # to take ownership of the construction space back to www:www
1749: #
1750:
1751:
1752: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
1753: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1754: if(&is_author($udom, $uname)) {
1755: &Debug(" Need to manage author permissions...");
1756: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1757: }
1758: }
1759: &Reply($client, $result, $userinput);
1760: }
1761:
1762:
1763: } else {
1764: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1765: }
1766: }
1767: return 1;
1768: }
1769: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1770:
1771: #
1772: # Determines if this is the home server for a user. The home server
1773: # for a user will have his/her lon-capa passwd file. Therefore all we need
1774: # to do is determine if this file exists.
1775: #
1776: # Parameters:
1777: # $cmd - The command that got us here.
1778: # $tail - Tail of the command (remaining parameters).
1779: # $client - File descriptor connected to client.
1780: # Returns
1781: # 0 - Requested to exit, caller should shut down.
1782: # 1 - Continue processing.
1783: # Implicit inputs:
1784: # The authentication systems describe above have their own forms of implicit
1785: # input into the authentication process that are described above.
1786: #
1787: sub is_home_handler {
1788: my ($cmd, $tail, $client) = @_;
1789:
1790: my $userinput = "$cmd:$tail";
1791:
1792: my ($udom,$uname)=split(/:/,$tail);
1793: chomp($uname);
1794: my $passfile = &password_filename($udom, $uname);
1795: if($passfile) {
1796: &Reply( $client, "found\n", $userinput);
1797: } else {
1798: &Failure($client, "not_found\n", $userinput);
1799: }
1800: return 1;
1801: }
1802: ®ister_handler("home", \&is_home_handler, 0,1,0);
1803:
1804: #
1805: # Process an update request for a resource?? I think what's going on here is
1806: # that a resource has been modified that we hold a subscription to.
1807: # If the resource is not local, then we must update, or at least invalidate our
1808: # cached copy of the resource.
1809: # FUTURE WORK:
1810: # I need to look at this logic carefully. My druthers would be to follow
1811: # typical caching logic, and simple invalidate the cache, drop any subscription
1812: # an let the next fetch start the ball rolling again... however that may
1813: # actually be more difficult than it looks given the complex web of
1814: # proxy servers.
1815: # Parameters:
1816: # $cmd - The command that got us here.
1817: # $tail - Tail of the command (remaining parameters).
1818: # $client - File descriptor connected to client.
1819: # Returns
1820: # 0 - Requested to exit, caller should shut down.
1821: # 1 - Continue processing.
1822: # Implicit inputs:
1823: # The authentication systems describe above have their own forms of implicit
1824: # input into the authentication process that are described above.
1825: #
1826: sub update_resource_handler {
1827:
1828: my ($cmd, $tail, $client) = @_;
1829:
1830: my $userinput = "$cmd:$tail";
1831:
1832: my $fname= $tail; # This allows interactive testing
1833:
1834:
1835: my $ownership=ishome($fname);
1836: if ($ownership eq 'not_owner') {
1837: if (-e $fname) {
1838: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1839: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1840: my $now=time;
1841: my $since=$now-$atime;
1842: if ($since>$perlvar{'lonExpire'}) {
1843: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
1844: &devalidate_meta_cache($fname);
1845: unlink("$fname");
1846: unlink("$fname.meta");
1847: } else {
1848: my $transname="$fname.in.transfer";
1849: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
1850: my $response;
1851: alarm(120);
1852: {
1853: my $ua=new LWP::UserAgent;
1854: my $request=new HTTP::Request('GET',"$remoteurl");
1855: $response=$ua->request($request,$transname);
1856: }
1857: alarm(0);
1858: if ($response->is_error()) {
1859: unlink($transname);
1860: my $message=$response->status_line;
1861: &logthis("LWP GET: $message for $fname ($remoteurl)");
1862: } else {
1863: if ($remoteurl!~/\.meta$/) {
1864: alarm(120);
1865: {
1866: my $ua=new LWP::UserAgent;
1867: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1868: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1869: if ($mresponse->is_error()) {
1870: unlink($fname.'.meta');
1871: }
1872: }
1873: alarm(0);
1874: }
1875: rename($transname,$fname);
1876: &devalidate_meta_cache($fname);
1877: }
1878: }
1879: &Reply( $client, "ok\n", $userinput);
1880: } else {
1881: &Failure($client, "not_found\n", $userinput);
1882: }
1883: } else {
1884: &Failure($client, "rejected\n", $userinput);
1885: }
1886: return 1;
1887: }
1888: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1889:
1890: sub devalidate_meta_cache {
1891: my ($url) = @_;
1892: use Cache::Memcached;
1893: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1894: $url = &Apache::lonnet::declutter($url);
1895: $url =~ s-\.meta$--;
1896: my $id = &escape('meta:'.$url);
1897: $memcache->delete($id);
1898: }
1899:
1900: #
1901: # Fetch a user file from a remote server to the user's home directory
1902: # userfiles subdir.
1903: # Parameters:
1904: # $cmd - The command that got us here.
1905: # $tail - Tail of the command (remaining parameters).
1906: # $client - File descriptor connected to client.
1907: # Returns
1908: # 0 - Requested to exit, caller should shut down.
1909: # 1 - Continue processing.
1910: #
1911: sub fetch_user_file_handler {
1912:
1913: my ($cmd, $tail, $client) = @_;
1914:
1915: my $userinput = "$cmd:$tail";
1916: my $fname = $tail;
1917: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1918: my $udir=&propath($udom,$uname).'/userfiles';
1919: unless (-e $udir) {
1920: mkdir($udir,0770);
1921: }
1922: Debug("fetch user file for $fname");
1923: if (-e $udir) {
1924: $ufile=~s/^[\.\~]+//;
1925:
1926: # IF necessary, create the path right down to the file.
1927: # Note that any regular files in the way of this path are
1928: # wiped out to deal with some earlier folly of mine.
1929:
1930: if (!&mkpath($udir.'/'.$ufile)) {
1931: &Failure($client, "unable_to_create\n", $userinput);
1932: }
1933:
1934: my $destname=$udir.'/'.$ufile;
1935: my $transname=$udir.'/'.$ufile.'.in.transit';
1936: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1937: my $response;
1938: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1939: alarm(120);
1940: {
1941: my $ua=new LWP::UserAgent;
1942: my $request=new HTTP::Request('GET',"$remoteurl");
1943: $response=$ua->request($request,$transname);
1944: }
1945: alarm(0);
1946: if ($response->is_error()) {
1947: unlink($transname);
1948: my $message=$response->status_line;
1949: &logthis("LWP GET: $message for $fname ($remoteurl)");
1950: &Failure($client, "failed\n", $userinput);
1951: } else {
1952: Debug("Renaming $transname to $destname");
1953: if (!rename($transname,$destname)) {
1954: &logthis("Unable to move $transname to $destname");
1955: unlink($transname);
1956: &Failure($client, "failed\n", $userinput);
1957: } else {
1958: &Reply($client, "ok\n", $userinput);
1959: }
1960: }
1961: } else {
1962: &Failure($client, "not_home\n", $userinput);
1963: }
1964: return 1;
1965: }
1966: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1967:
1968: #
1969: # Remove a file from a user's home directory userfiles subdirectory.
1970: # Parameters:
1971: # cmd - the Lond request keyword that got us here.
1972: # tail - the part of the command past the keyword.
1973: # client- File descriptor connected with the client.
1974: #
1975: # Returns:
1976: # 1 - Continue processing.
1977: sub remove_user_file_handler {
1978: my ($cmd, $tail, $client) = @_;
1979:
1980: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1981:
1982: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1983: if ($ufile =~m|/\.\./|) {
1984: # any files paths with /../ in them refuse
1985: # to deal with
1986: &Failure($client, "refused\n", "$cmd:$tail");
1987: } else {
1988: my $udir = &propath($udom,$uname);
1989: if (-e $udir) {
1990: my $file=$udir.'/userfiles/'.$ufile;
1991: if (-e $file) {
1992: #
1993: # If the file is a regular file unlink is fine...
1994: # However it's possible the client wants a dir.
1995: # removed, in which case rmdir is more approprate:
1996: #
1997: if (-f $file){
1998: unlink($file);
1999: } elsif(-d $file) {
2000: rmdir($file);
2001: }
2002: if (-e $file) {
2003: # File is still there after we deleted it ?!?
2004:
2005: &Failure($client, "failed\n", "$cmd:$tail");
2006: } else {
2007: &Reply($client, "ok\n", "$cmd:$tail");
2008: }
2009: } else {
2010: &Failure($client, "not_found\n", "$cmd:$tail");
2011: }
2012: } else {
2013: &Failure($client, "not_home\n", "$cmd:$tail");
2014: }
2015: }
2016: return 1;
2017: }
2018: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2019:
2020: #
2021: # make a directory in a user's home directory userfiles subdirectory.
2022: # Parameters:
2023: # cmd - the Lond request keyword that got us here.
2024: # tail - the part of the command past the keyword.
2025: # client- File descriptor connected with the client.
2026: #
2027: # Returns:
2028: # 1 - Continue processing.
2029: sub mkdir_user_file_handler {
2030: my ($cmd, $tail, $client) = @_;
2031:
2032: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2033: $dir=&unescape($dir);
2034: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2035: if ($ufile =~m|/\.\./|) {
2036: # any files paths with /../ in them refuse
2037: # to deal with
2038: &Failure($client, "refused\n", "$cmd:$tail");
2039: } else {
2040: my $udir = &propath($udom,$uname);
2041: if (-e $udir) {
2042: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2043: if (!&mkpath($newdir)) {
2044: &Failure($client, "failed\n", "$cmd:$tail");
2045: }
2046: &Reply($client, "ok\n", "$cmd:$tail");
2047: } else {
2048: &Failure($client, "not_home\n", "$cmd:$tail");
2049: }
2050: }
2051: return 1;
2052: }
2053: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2054:
2055: #
2056: # rename a file in a user's home directory userfiles subdirectory.
2057: # Parameters:
2058: # cmd - the Lond request keyword that got us here.
2059: # tail - the part of the command past the keyword.
2060: # client- File descriptor connected with the client.
2061: #
2062: # Returns:
2063: # 1 - Continue processing.
2064: sub rename_user_file_handler {
2065: my ($cmd, $tail, $client) = @_;
2066:
2067: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2068: $old=&unescape($old);
2069: $new=&unescape($new);
2070: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2071: # any files paths with /../ in them refuse to deal with
2072: &Failure($client, "refused\n", "$cmd:$tail");
2073: } else {
2074: my $udir = &propath($udom,$uname);
2075: if (-e $udir) {
2076: my $oldfile=$udir.'/userfiles/'.$old;
2077: my $newfile=$udir.'/userfiles/'.$new;
2078: if (-e $newfile) {
2079: &Failure($client, "exists\n", "$cmd:$tail");
2080: } elsif (! -e $oldfile) {
2081: &Failure($client, "not_found\n", "$cmd:$tail");
2082: } else {
2083: if (!rename($oldfile,$newfile)) {
2084: &Failure($client, "failed\n", "$cmd:$tail");
2085: } else {
2086: &Reply($client, "ok\n", "$cmd:$tail");
2087: }
2088: }
2089: } else {
2090: &Failure($client, "not_home\n", "$cmd:$tail");
2091: }
2092: }
2093: return 1;
2094: }
2095: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2096:
2097: #
2098: # Authenticate access to a user file by checking that the token the user's
2099: # passed also exists in their session file
2100: #
2101: # Parameters:
2102: # cmd - The request keyword that dispatched to tus.
2103: # tail - The tail of the request (colon separated parameters).
2104: # client - Filehandle open on the client.
2105: # Return:
2106: # 1.
2107: sub token_auth_user_file_handler {
2108: my ($cmd, $tail, $client) = @_;
2109:
2110: my ($fname, $session) = split(/:/, $tail);
2111:
2112: chomp($session);
2113: my $reply="non_auth\n";
2114: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2115: if (open(ENVIN,"$file")) {
2116: flock(ENVIN,LOCK_SH);
2117: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2118: if (exists($disk_env{"userfile.$fname"})) {
2119: $reply="ok\n";
2120: } else {
2121: foreach my $envname (keys(%disk_env)) {
2122: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2123: $reply="ok\n";
2124: last;
2125: }
2126: }
2127: }
2128: untie(%disk_env);
2129: close(ENVIN);
2130: &Reply($client, $reply, "$cmd:$tail");
2131: } else {
2132: &Failure($client, "invalid_token\n", "$cmd:$tail");
2133: }
2134: return 1;
2135:
2136: }
2137: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2138:
2139: #
2140: # Unsubscribe from a resource.
2141: #
2142: # Parameters:
2143: # $cmd - The command that got us here.
2144: # $tail - Tail of the command (remaining parameters).
2145: # $client - File descriptor connected to client.
2146: # Returns
2147: # 0 - Requested to exit, caller should shut down.
2148: # 1 - Continue processing.
2149: #
2150: sub unsubscribe_handler {
2151: my ($cmd, $tail, $client) = @_;
2152:
2153: my $userinput= "$cmd:$tail";
2154:
2155: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2156:
2157: &Debug("Unsubscribing $fname");
2158: if (-e $fname) {
2159: &Debug("Exists");
2160: &Reply($client, &unsub($fname,$clientip), $userinput);
2161: } else {
2162: &Failure($client, "not_found\n", $userinput);
2163: }
2164: return 1;
2165: }
2166: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2167:
2168: # Subscribe to a resource
2169: #
2170: # Parameters:
2171: # $cmd - The command that got us here.
2172: # $tail - Tail of the command (remaining parameters).
2173: # $client - File descriptor connected to client.
2174: # Returns
2175: # 0 - Requested to exit, caller should shut down.
2176: # 1 - Continue processing.
2177: #
2178: sub subscribe_handler {
2179: my ($cmd, $tail, $client)= @_;
2180:
2181: my $userinput = "$cmd:$tail";
2182:
2183: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2184:
2185: return 1;
2186: }
2187: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2188:
2189: #
2190: # Determine the version of a resource (?) Or is it return
2191: # the top version of the resource? Not yet clear from the
2192: # code in currentversion.
2193: #
2194: # Parameters:
2195: # $cmd - The command that got us here.
2196: # $tail - Tail of the command (remaining parameters).
2197: # $client - File descriptor connected to client.
2198: # Returns
2199: # 0 - Requested to exit, caller should shut down.
2200: # 1 - Continue processing.
2201: #
2202: sub current_version_handler {
2203: my ($cmd, $tail, $client) = @_;
2204:
2205: my $userinput= "$cmd:$tail";
2206:
2207: my $fname = $tail;
2208: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2209: return 1;
2210:
2211: }
2212: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2213:
2214: # Make an entry in a user's activity log.
2215: #
2216: # Parameters:
2217: # $cmd - The command that got us here.
2218: # $tail - Tail of the command (remaining parameters).
2219: # $client - File descriptor connected to client.
2220: # Returns
2221: # 0 - Requested to exit, caller should shut down.
2222: # 1 - Continue processing.
2223: #
2224: sub activity_log_handler {
2225: my ($cmd, $tail, $client) = @_;
2226:
2227:
2228: my $userinput= "$cmd:$tail";
2229:
2230: my ($udom,$uname,$what)=split(/:/,$tail);
2231: chomp($what);
2232: my $proname=&propath($udom,$uname);
2233: my $now=time;
2234: my $hfh;
2235: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2236: print $hfh "$now:$clientname:$what\n";
2237: &Reply( $client, "ok\n", $userinput);
2238: } else {
2239: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2240: ."while attempting log\n",
2241: $userinput);
2242: }
2243:
2244: return 1;
2245: }
2246: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2247:
2248: #
2249: # Put a namespace entry in a user profile hash.
2250: # My druthers would be for this to be an encrypted interaction too.
2251: # anything that might be an inadvertent covert channel about either
2252: # user authentication or user personal information....
2253: #
2254: # Parameters:
2255: # $cmd - The command that got us here.
2256: # $tail - Tail of the command (remaining parameters).
2257: # $client - File descriptor connected to client.
2258: # Returns
2259: # 0 - Requested to exit, caller should shut down.
2260: # 1 - Continue processing.
2261: #
2262: sub put_user_profile_entry {
2263: my ($cmd, $tail, $client) = @_;
2264:
2265: my $userinput = "$cmd:$tail";
2266:
2267: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2268: if ($namespace ne 'roles') {
2269: chomp($what);
2270: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2271: &GDBM_WRCREAT(),"P",$what);
2272: if($hashref) {
2273: my @pairs=split(/\&/,$what);
2274: foreach my $pair (@pairs) {
2275: my ($key,$value)=split(/=/,$pair);
2276: $hashref->{$key}=$value;
2277: }
2278: if (&untie_user_hash($hashref)) {
2279: &Reply( $client, "ok\n", $userinput);
2280: } else {
2281: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2282: "while attempting put\n",
2283: $userinput);
2284: }
2285: } else {
2286: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2287: "while attempting put\n", $userinput);
2288: }
2289: } else {
2290: &Failure( $client, "refused\n", $userinput);
2291: }
2292:
2293: return 1;
2294: }
2295: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2296:
2297: # Put a piece of new data in hash, returns error if entry already exists
2298: # Parameters:
2299: # $cmd - The command that got us here.
2300: # $tail - Tail of the command (remaining parameters).
2301: # $client - File descriptor connected to client.
2302: # Returns
2303: # 0 - Requested to exit, caller should shut down.
2304: # 1 - Continue processing.
2305: #
2306: sub newput_user_profile_entry {
2307: my ($cmd, $tail, $client) = @_;
2308:
2309: my $userinput = "$cmd:$tail";
2310:
2311: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2312: if ($namespace eq 'roles') {
2313: &Failure( $client, "refused\n", $userinput);
2314: return 1;
2315: }
2316:
2317: chomp($what);
2318:
2319: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2320: &GDBM_WRCREAT(),"N",$what);
2321: if(!$hashref) {
2322: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2323: "while attempting put\n", $userinput);
2324: return 1;
2325: }
2326:
2327: my @pairs=split(/\&/,$what);
2328: foreach my $pair (@pairs) {
2329: my ($key,$value)=split(/=/,$pair);
2330: if (exists($hashref->{$key})) {
2331: &Failure($client, "key_exists: ".$key."\n",$userinput);
2332: return 1;
2333: }
2334: }
2335:
2336: foreach my $pair (@pairs) {
2337: my ($key,$value)=split(/=/,$pair);
2338: $hashref->{$key}=$value;
2339: }
2340:
2341: if (&untie_user_hash($hashref)) {
2342: &Reply( $client, "ok\n", $userinput);
2343: } else {
2344: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2345: "while attempting put\n",
2346: $userinput);
2347: }
2348: return 1;
2349: }
2350: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2351:
2352: #
2353: # Increment a profile entry in the user history file.
2354: # The history contains keyword value pairs. In this case,
2355: # The value itself is a pair of numbers. The first, the current value
2356: # the second an increment that this function applies to the current
2357: # value.
2358: #
2359: # Parameters:
2360: # $cmd - The command that got us here.
2361: # $tail - Tail of the command (remaining parameters).
2362: # $client - File descriptor connected to client.
2363: # Returns
2364: # 0 - Requested to exit, caller should shut down.
2365: # 1 - Continue processing.
2366: #
2367: sub increment_user_value_handler {
2368: my ($cmd, $tail, $client) = @_;
2369:
2370: my $userinput = "$cmd:$tail";
2371:
2372: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2373: if ($namespace ne 'roles') {
2374: chomp($what);
2375: my $hashref = &tie_user_hash($udom, $uname,
2376: $namespace, &GDBM_WRCREAT(),
2377: "P",$what);
2378: if ($hashref) {
2379: my @pairs=split(/\&/,$what);
2380: foreach my $pair (@pairs) {
2381: my ($key,$value)=split(/=/,$pair);
2382: $value = &unescape($value);
2383: # We could check that we have a number...
2384: if (! defined($value) || $value eq '') {
2385: $value = 1;
2386: }
2387: $hashref->{$key}+=$value;
2388: if ($namespace eq 'nohist_resourcetracker') {
2389: if ($hashref->{$key} < 0) {
2390: $hashref->{$key} = 0;
2391: }
2392: }
2393: }
2394: if (&untie_user_hash($hashref)) {
2395: &Reply( $client, "ok\n", $userinput);
2396: } else {
2397: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2398: "while attempting inc\n", $userinput);
2399: }
2400: } else {
2401: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2402: "while attempting inc\n", $userinput);
2403: }
2404: } else {
2405: &Failure($client, "refused\n", $userinput);
2406: }
2407:
2408: return 1;
2409: }
2410: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2411:
2412: #
2413: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2414: # Each 'role' a user has implies a set of permissions. Adding a new role
2415: # for a person grants the permissions packaged with that role
2416: # to that user when the role is selected.
2417: #
2418: # Parameters:
2419: # $cmd - The command string (rolesput).
2420: # $tail - The remainder of the request line. For rolesput this
2421: # consists of a colon separated list that contains:
2422: # The domain and user that is granting the role (logged).
2423: # The domain and user that is getting the role.
2424: # The roles being granted as a set of & separated pairs.
2425: # each pair a key value pair.
2426: # $client - File descriptor connected to the client.
2427: # Returns:
2428: # 0 - If the daemon should exit
2429: # 1 - To continue processing.
2430: #
2431: #
2432: sub roles_put_handler {
2433: my ($cmd, $tail, $client) = @_;
2434:
2435: my $userinput = "$cmd:$tail";
2436:
2437: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2438:
2439:
2440: my $namespace='roles';
2441: chomp($what);
2442: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2443: &GDBM_WRCREAT(), "P",
2444: "$exedom:$exeuser:$what");
2445: #
2446: # Log the attempt to set a role. The {}'s here ensure that the file
2447: # handle is open for the minimal amount of time. Since the flush
2448: # is done on close this improves the chances the log will be an un-
2449: # corrupted ordered thing.
2450: if ($hashref) {
2451: my $pass_entry = &get_auth_type($udom, $uname);
2452: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2453: $auth_type = $auth_type.":";
2454: my @pairs=split(/\&/,$what);
2455: foreach my $pair (@pairs) {
2456: my ($key,$value)=split(/=/,$pair);
2457: &manage_permissions($key, $udom, $uname,
2458: $auth_type);
2459: $hashref->{$key}=$value;
2460: }
2461: if (&untie_user_hash($hashref)) {
2462: &Reply($client, "ok\n", $userinput);
2463: } else {
2464: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2465: "while attempting rolesput\n", $userinput);
2466: }
2467: } else {
2468: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2469: "while attempting rolesput\n", $userinput);
2470: }
2471: return 1;
2472: }
2473: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2474:
2475: #
2476: # Deletes (removes) a role for a user. This is equivalent to removing
2477: # a permissions package associated with the role from the user's profile.
2478: #
2479: # Parameters:
2480: # $cmd - The command (rolesdel)
2481: # $tail - The remainder of the request line. This consists
2482: # of:
2483: # The domain and user requesting the change (logged)
2484: # The domain and user being changed.
2485: # The roles being revoked. These are shipped to us
2486: # as a bunch of & separated role name keywords.
2487: # $client - The file handle open on the client.
2488: # Returns:
2489: # 1 - Continue processing
2490: # 0 - Exit.
2491: #
2492: sub roles_delete_handler {
2493: my ($cmd, $tail, $client) = @_;
2494:
2495: my $userinput = "$cmd:$tail";
2496:
2497: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2498: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2499: "what = ".$what);
2500: my $namespace='roles';
2501: chomp($what);
2502: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2503: &GDBM_WRCREAT(), "D",
2504: "$exedom:$exeuser:$what");
2505:
2506: if ($hashref) {
2507: my @rolekeys=split(/\&/,$what);
2508:
2509: foreach my $key (@rolekeys) {
2510: delete $hashref->{$key};
2511: }
2512: if (&untie_user_hash($hashref)) {
2513: &Reply($client, "ok\n", $userinput);
2514: } else {
2515: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2516: "while attempting rolesdel\n", $userinput);
2517: }
2518: } else {
2519: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2520: "while attempting rolesdel\n", $userinput);
2521: }
2522:
2523: return 1;
2524: }
2525: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2526:
2527: # Unencrypted get from a user's profile database. See
2528: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2529: # This function retrieves a keyed item from a specific named database in the
2530: # user's directory.
2531: #
2532: # Parameters:
2533: # $cmd - Command request keyword (get).
2534: # $tail - Tail of the command. This is a colon separated list
2535: # consisting of the domain and username that uniquely
2536: # identifies the profile,
2537: # The 'namespace' which selects the gdbm file to
2538: # do the lookup in,
2539: # & separated list of keys to lookup. Note that
2540: # the values are returned as an & separated list too.
2541: # $client - File descriptor open on the client.
2542: # Returns:
2543: # 1 - Continue processing.
2544: # 0 - Exit.
2545: #
2546: sub get_profile_entry {
2547: my ($cmd, $tail, $client) = @_;
2548:
2549: my $userinput= "$cmd:$tail";
2550:
2551: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2552: chomp($what);
2553:
2554: my $replystring = read_profile($udom, $uname, $namespace, $what);
2555: my ($first) = split(/:/,$replystring);
2556: if($first ne "error") {
2557: &Reply($client, "$replystring\n", $userinput);
2558: } else {
2559: &Failure($client, $replystring." while attempting get\n", $userinput);
2560: }
2561: return 1;
2562:
2563:
2564: }
2565: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2566:
2567: #
2568: # Process the encrypted get request. Note that the request is sent
2569: # in clear, but the reply is encrypted. This is a small covert channel:
2570: # information about the sensitive keys is given to the snooper. Just not
2571: # information about the values of the sensitive key. Hmm if I wanted to
2572: # know these I'd snoop for the egets. Get the profile item names from them
2573: # and then issue a get for them since there's no enforcement of the
2574: # requirement of an encrypted get for particular profile items. If I
2575: # were re-doing this, I'd force the request to be encrypted as well as the
2576: # reply. I'd also just enforce encrypted transactions for all gets since
2577: # that would prevent any covert channel snooping.
2578: #
2579: # Parameters:
2580: # $cmd - Command keyword of request (eget).
2581: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2582: # $client - File open on the client.
2583: # Returns:
2584: # 1 - Continue processing
2585: # 0 - server should exit.
2586: sub get_profile_entry_encrypted {
2587: my ($cmd, $tail, $client) = @_;
2588:
2589: my $userinput = "$cmd:$tail";
2590:
2591: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2592: chomp($what);
2593: my $qresult = read_profile($udom, $uname, $namespace, $what);
2594: my ($first) = split(/:/, $qresult);
2595: if($first ne "error") {
2596:
2597: if ($cipher) {
2598: my $cmdlength=length($qresult);
2599: $qresult.=" ";
2600: my $encqresult='';
2601: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2602: $encqresult.= unpack("H16",
2603: $cipher->encrypt(substr($qresult,
2604: $encidx,
2605: 8)));
2606: }
2607: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2608: } else {
2609: &Failure( $client, "error:no_key\n", $userinput);
2610: }
2611: } else {
2612: &Failure($client, "$qresult while attempting eget\n", $userinput);
2613:
2614: }
2615:
2616: return 1;
2617: }
2618: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
2619:
2620: #
2621: # Deletes a key in a user profile database.
2622: #
2623: # Parameters:
2624: # $cmd - Command keyword (del).
2625: # $tail - Command tail. IN this case a colon
2626: # separated list containing:
2627: # The domain and user that identifies uniquely
2628: # the identity of the user.
2629: # The profile namespace (name of the profile
2630: # database file).
2631: # & separated list of keywords to delete.
2632: # $client - File open on client socket.
2633: # Returns:
2634: # 1 - Continue processing
2635: # 0 - Exit server.
2636: #
2637: #
2638: sub delete_profile_entry {
2639: my ($cmd, $tail, $client) = @_;
2640:
2641: my $userinput = "cmd:$tail";
2642:
2643: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2644: chomp($what);
2645: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2646: &GDBM_WRCREAT(),
2647: "D",$what);
2648: if ($hashref) {
2649: my @keys=split(/\&/,$what);
2650: foreach my $key (@keys) {
2651: delete($hashref->{$key});
2652: }
2653: if (&untie_user_hash($hashref)) {
2654: &Reply($client, "ok\n", $userinput);
2655: } else {
2656: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2657: "while attempting del\n", $userinput);
2658: }
2659: } else {
2660: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2661: "while attempting del\n", $userinput);
2662: }
2663: return 1;
2664: }
2665: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2666:
2667: #
2668: # List the set of keys that are defined in a profile database file.
2669: # A successful reply from this will contain an & separated list of
2670: # the keys.
2671: # Parameters:
2672: # $cmd - Command request (keys).
2673: # $tail - Remainder of the request, a colon separated
2674: # list containing domain/user that identifies the
2675: # user being queried, and the database namespace
2676: # (database filename essentially).
2677: # $client - File open on the client.
2678: # Returns:
2679: # 1 - Continue processing.
2680: # 0 - Exit the server.
2681: #
2682: sub get_profile_keys {
2683: my ($cmd, $tail, $client) = @_;
2684:
2685: my $userinput = "$cmd:$tail";
2686:
2687: my ($udom,$uname,$namespace)=split(/:/,$tail);
2688: my $qresult='';
2689: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2690: &GDBM_READER());
2691: if ($hashref) {
2692: foreach my $key (keys %$hashref) {
2693: $qresult.="$key&";
2694: }
2695: if (&untie_user_hash($hashref)) {
2696: $qresult=~s/\&$//;
2697: &Reply($client, "$qresult\n", $userinput);
2698: } else {
2699: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2700: "while attempting keys\n", $userinput);
2701: }
2702: } else {
2703: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2704: "while attempting keys\n", $userinput);
2705: }
2706:
2707: return 1;
2708: }
2709: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2710:
2711: #
2712: # Dump the contents of a user profile database.
2713: # Note that this constitutes a very large covert channel too since
2714: # the dump will return sensitive information that is not encrypted.
2715: # The naive security assumption is that the session negotiation ensures
2716: # our client is trusted and I don't believe that's assured at present.
2717: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2718: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2719: #
2720: # Parameters:
2721: # $cmd - The command request keyword (currentdump).
2722: # $tail - Remainder of the request, consisting of a colon
2723: # separated list that has the domain/username and
2724: # the namespace to dump (database file).
2725: # $client - file open on the remote client.
2726: # Returns:
2727: # 1 - Continue processing.
2728: # 0 - Exit the server.
2729: #
2730: sub dump_profile_database {
2731: my ($cmd, $tail, $client) = @_;
2732:
2733: my $userinput = "$cmd:$tail";
2734:
2735: my ($udom,$uname,$namespace) = split(/:/,$tail);
2736: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2737: &GDBM_READER());
2738: if ($hashref) {
2739: # Structure of %data:
2740: # $data{$symb}->{$parameter}=$value;
2741: # $data{$symb}->{'v.'.$parameter}=$version;
2742: # since $parameter will be unescaped, we do not
2743: # have to worry about silly parameter names...
2744:
2745: my $qresult='';
2746: my %data = (); # A hash of anonymous hashes..
2747: while (my ($key,$value) = each(%$hashref)) {
2748: my ($v,$symb,$param) = split(/:/,$key);
2749: next if ($v eq 'version' || $symb eq 'keys');
2750: next if (exists($data{$symb}) &&
2751: exists($data{$symb}->{$param}) &&
2752: $data{$symb}->{'v.'.$param} > $v);
2753: $data{$symb}->{$param}=$value;
2754: $data{$symb}->{'v.'.$param}=$v;
2755: }
2756: if (&untie_user_hash($hashref)) {
2757: while (my ($symb,$param_hash) = each(%data)) {
2758: while(my ($param,$value) = each (%$param_hash)){
2759: next if ($param =~ /^v\./); # Ignore versions...
2760: #
2761: # Just dump the symb=value pairs separated by &
2762: #
2763: $qresult.=$symb.':'.$param.'='.$value.'&';
2764: }
2765: }
2766: chop($qresult);
2767: &Reply($client , "$qresult\n", $userinput);
2768: } else {
2769: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2770: "while attempting currentdump\n", $userinput);
2771: }
2772: } else {
2773: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2774: "while attempting currentdump\n", $userinput);
2775: }
2776:
2777: return 1;
2778: }
2779: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2780:
2781: #
2782: # Dump a profile database with an optional regular expression
2783: # to match against the keys. In this dump, no effort is made
2784: # to separate symb from version information. Presumably the
2785: # databases that are dumped by this command are of a different
2786: # structure. Need to look at this and improve the documentation of
2787: # both this and the currentdump handler.
2788: # Parameters:
2789: # $cmd - The command keyword.
2790: # $tail - All of the characters after the $cmd:
2791: # These are expected to be a colon
2792: # separated list containing:
2793: # domain/user - identifying the user.
2794: # namespace - identifying the database.
2795: # regexp - optional regular expression
2796: # that is matched against
2797: # database keywords to do
2798: # selective dumps.
2799: # $client - Channel open on the client.
2800: # Returns:
2801: # 1 - Continue processing.
2802: # Side effects:
2803: # response is written to $client.
2804: #
2805: sub dump_with_regexp {
2806: my ($cmd, $tail, $client) = @_;
2807:
2808:
2809: my $userinput = "$cmd:$tail";
2810:
2811: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
2812: if (defined($regexp)) {
2813: $regexp=&unescape($regexp);
2814: } else {
2815: $regexp='.';
2816: }
2817: my ($start,$end);
2818: if (defined($range)) {
2819: if ($range =~/^(\d+)\-(\d+)$/) {
2820: ($start,$end) = ($1,$2);
2821: } elsif ($range =~/^(\d+)$/) {
2822: ($start,$end) = (0,$1);
2823: } else {
2824: undef($range);
2825: }
2826: }
2827: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2828: &GDBM_READER());
2829: if ($hashref) {
2830: my $qresult='';
2831: my $count=0;
2832: while (my ($key,$value) = each(%$hashref)) {
2833: if ($regexp eq '.') {
2834: $count++;
2835: if (defined($range) && $count >= $end) { last; }
2836: if (defined($range) && $count < $start) { next; }
2837: $qresult.=$key.'='.$value.'&';
2838: } else {
2839: my $unescapeKey = &unescape($key);
2840: if (eval('$unescapeKey=~/$regexp/')) {
2841: $count++;
2842: if (defined($range) && $count >= $end) { last; }
2843: if (defined($range) && $count < $start) { next; }
2844: $qresult.="$key=$value&";
2845: }
2846: }
2847: }
2848: if (&untie_user_hash($hashref)) {
2849: chop($qresult);
2850: &Reply($client, "$qresult\n", $userinput);
2851: } else {
2852: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2853: "while attempting dump\n", $userinput);
2854: }
2855: } else {
2856: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2857: "while attempting dump\n", $userinput);
2858: }
2859:
2860: return 1;
2861: }
2862: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2863:
2864: # Store a set of key=value pairs associated with a versioned name.
2865: #
2866: # Parameters:
2867: # $cmd - Request command keyword.
2868: # $tail - Tail of the request. This is a colon
2869: # separated list containing:
2870: # domain/user - User and authentication domain.
2871: # namespace - Name of the database being modified
2872: # rid - Resource keyword to modify.
2873: # what - new value associated with rid.
2874: #
2875: # $client - Socket open on the client.
2876: #
2877: #
2878: # Returns:
2879: # 1 (keep on processing).
2880: # Side-Effects:
2881: # Writes to the client
2882: sub store_handler {
2883: my ($cmd, $tail, $client) = @_;
2884:
2885: my $userinput = "$cmd:$tail";
2886:
2887: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2888: if ($namespace ne 'roles') {
2889:
2890: chomp($what);
2891: my @pairs=split(/\&/,$what);
2892: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2893: &GDBM_WRCREAT(), "S",
2894: "$rid:$what");
2895: if ($hashref) {
2896: my $now = time;
2897: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2898: my $key;
2899: $hashref->{"version:$rid"}++;
2900: my $version=$hashref->{"version:$rid"};
2901: my $allkeys='';
2902: foreach my $pair (@pairs) {
2903: my ($key,$value)=split(/=/,$pair);
2904: $allkeys.=$key.':';
2905: $hashref->{"$version:$rid:$key"}=$value;
2906: }
2907: $hashref->{"$version:$rid:timestamp"}=$now;
2908: $allkeys.='timestamp';
2909: $hashref->{"$version:keys:$rid"}=$allkeys;
2910: if (&untie_user_hash($hashref)) {
2911: &Reply($client, "ok\n", $userinput);
2912: } else {
2913: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2914: "while attempting store\n", $userinput);
2915: }
2916: } else {
2917: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2918: "while attempting store\n", $userinput);
2919: }
2920: } else {
2921: &Failure($client, "refused\n", $userinput);
2922: }
2923:
2924: return 1;
2925: }
2926: ®ister_handler("store", \&store_handler, 0, 1, 0);
2927:
2928: # Modify a set of key=value pairs associated with a versioned name.
2929: #
2930: # Parameters:
2931: # $cmd - Request command keyword.
2932: # $tail - Tail of the request. This is a colon
2933: # separated list containing:
2934: # domain/user - User and authentication domain.
2935: # namespace - Name of the database being modified
2936: # rid - Resource keyword to modify.
2937: # v - Version item to modify
2938: # what - new value associated with rid.
2939: #
2940: # $client - Socket open on the client.
2941: #
2942: #
2943: # Returns:
2944: # 1 (keep on processing).
2945: # Side-Effects:
2946: # Writes to the client
2947: sub putstore_handler {
2948: my ($cmd, $tail, $client) = @_;
2949:
2950: my $userinput = "$cmd:$tail";
2951:
2952: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
2953: if ($namespace ne 'roles') {
2954:
2955: chomp($what);
2956: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2957: &GDBM_WRCREAT(), "M",
2958: "$rid:$v:$what");
2959: if ($hashref) {
2960: my $now = time;
2961: my %data = &hash_extract($what);
2962: my @allkeys;
2963: while (my($key,$value) = each(%data)) {
2964: push(@allkeys,$key);
2965: $hashref->{"$v:$rid:$key"} = $value;
2966: }
2967: my $allkeys = join(':',@allkeys);
2968: $hashref->{"$v:keys:$rid"}=$allkeys;
2969:
2970: if (&untie_user_hash($hashref)) {
2971: &Reply($client, "ok\n", $userinput);
2972: } else {
2973: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2974: "while attempting store\n", $userinput);
2975: }
2976: } else {
2977: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2978: "while attempting store\n", $userinput);
2979: }
2980: } else {
2981: &Failure($client, "refused\n", $userinput);
2982: }
2983:
2984: return 1;
2985: }
2986: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
2987:
2988: sub hash_extract {
2989: my ($str)=@_;
2990: my %hash;
2991: foreach my $pair (split(/\&/,$str)) {
2992: my ($key,$value)=split(/=/,$pair);
2993: $hash{$key}=$value;
2994: }
2995: return (%hash);
2996: }
2997: sub hash_to_str {
2998: my ($hash_ref)=@_;
2999: my $str;
3000: foreach my $key (keys(%$hash_ref)) {
3001: $str.=$key.'='.$hash_ref->{$key}.'&';
3002: }
3003: $str=~s/\&$//;
3004: return $str;
3005: }
3006:
3007: #
3008: # Dump out all versions of a resource that has key=value pairs associated
3009: # with it for each version. These resources are built up via the store
3010: # command.
3011: #
3012: # Parameters:
3013: # $cmd - Command keyword.
3014: # $tail - Remainder of the request which consists of:
3015: # domain/user - User and auth. domain.
3016: # namespace - name of resource database.
3017: # rid - Resource id.
3018: # $client - socket open on the client.
3019: #
3020: # Returns:
3021: # 1 indicating the caller should not yet exit.
3022: # Side-effects:
3023: # Writes a reply to the client.
3024: # The reply is a string of the following shape:
3025: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3026: # Where the 1 above represents version 1.
3027: # this continues for all pairs of keys in all versions.
3028: #
3029: #
3030: #
3031: #
3032: sub restore_handler {
3033: my ($cmd, $tail, $client) = @_;
3034:
3035: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3036: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3037: $namespace=~s/\//\_/g;
3038: $namespace = &LONCAPA::clean_username($namespace);
3039:
3040: chomp($rid);
3041: my $qresult='';
3042: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3043: if ($hashref) {
3044: my $version=$hashref->{"version:$rid"};
3045: $qresult.="version=$version&";
3046: my $scope;
3047: for ($scope=1;$scope<=$version;$scope++) {
3048: my $vkeys=$hashref->{"$scope:keys:$rid"};
3049: my @keys=split(/:/,$vkeys);
3050: my $key;
3051: $qresult.="$scope:keys=$vkeys&";
3052: foreach $key (@keys) {
3053: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3054: }
3055: }
3056: if (&untie_user_hash($hashref)) {
3057: $qresult=~s/\&$//;
3058: &Reply( $client, "$qresult\n", $userinput);
3059: } else {
3060: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3061: "while attempting restore\n", $userinput);
3062: }
3063: } else {
3064: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3065: "while attempting restore\n", $userinput);
3066: }
3067:
3068: return 1;
3069:
3070:
3071: }
3072: ®ister_handler("restore", \&restore_handler, 0,1,0);
3073:
3074: #
3075: # Add a chat message to a synchronous discussion board.
3076: #
3077: # Parameters:
3078: # $cmd - Request keyword.
3079: # $tail - Tail of the command. A colon separated list
3080: # containing:
3081: # cdom - Domain on which the chat board lives
3082: # cnum - Course containing the chat board.
3083: # newpost - Body of the posting.
3084: # group - Optional group, if chat board is only
3085: # accessible in a group within the course
3086: # $client - Socket open on the client.
3087: # Returns:
3088: # 1 - Indicating caller should keep on processing.
3089: #
3090: # Side-effects:
3091: # writes a reply to the client.
3092: #
3093: #
3094: sub send_chat_handler {
3095: my ($cmd, $tail, $client) = @_;
3096:
3097:
3098: my $userinput = "$cmd:$tail";
3099:
3100: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3101: &chat_add($cdom,$cnum,$newpost,$group);
3102: &Reply($client, "ok\n", $userinput);
3103:
3104: return 1;
3105: }
3106: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3107:
3108: #
3109: # Retrieve the set of chat messages from a discussion board.
3110: #
3111: # Parameters:
3112: # $cmd - Command keyword that initiated the request.
3113: # $tail - Remainder of the request after the command
3114: # keyword. In this case a colon separated list of
3115: # chat domain - Which discussion board.
3116: # chat id - Discussion thread(?)
3117: # domain/user - Authentication domain and username
3118: # of the requesting person.
3119: # group - Optional course group containing
3120: # the board.
3121: # $client - Socket open on the client program.
3122: # Returns:
3123: # 1 - continue processing
3124: # Side effects:
3125: # Response is written to the client.
3126: #
3127: sub retrieve_chat_handler {
3128: my ($cmd, $tail, $client) = @_;
3129:
3130:
3131: my $userinput = "$cmd:$tail";
3132:
3133: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3134: my $reply='';
3135: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3136: $reply.=&escape($_).':';
3137: }
3138: $reply=~s/\:$//;
3139: &Reply($client, $reply."\n", $userinput);
3140:
3141:
3142: return 1;
3143: }
3144: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3145:
3146: #
3147: # Initiate a query of an sql database. SQL query repsonses get put in
3148: # a file for later retrieval. This prevents sql query results from
3149: # bottlenecking the system. Note that with loncnew, perhaps this is
3150: # less of an issue since multiple outstanding requests can be concurrently
3151: # serviced.
3152: #
3153: # Parameters:
3154: # $cmd - COmmand keyword that initiated the request.
3155: # $tail - Remainder of the command after the keyword.
3156: # For this function, this consists of a query and
3157: # 3 arguments that are self-documentingly labelled
3158: # in the original arg1, arg2, arg3.
3159: # $client - Socket open on the client.
3160: # Return:
3161: # 1 - Indicating processing should continue.
3162: # Side-effects:
3163: # a reply is written to $client.
3164: #
3165: sub send_query_handler {
3166: my ($cmd, $tail, $client) = @_;
3167:
3168:
3169: my $userinput = "$cmd:$tail";
3170:
3171: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3172: $query=~s/\n*$//g;
3173: &Reply($client, "". &sql_reply("$clientname\&$query".
3174: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3175: $userinput);
3176:
3177: return 1;
3178: }
3179: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3180:
3181: #
3182: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3183: # The query is submitted via a "querysend" transaction.
3184: # There it is passed on to the lonsql daemon, queued and issued to
3185: # mysql.
3186: # This transaction is invoked when the sql transaction is complete
3187: # it stores the query results in flie and indicates query completion.
3188: # presumably local software then fetches this response... I'm guessing
3189: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3190: # lonsql on completion of the query interacts with the lond of our
3191: # client to do a query reply storing two files:
3192: # - id - The results of the query.
3193: # - id.end - Indicating the transaction completed.
3194: # NOTE: id is a unique id assigned to the query and querysend time.
3195: # Parameters:
3196: # $cmd - Command keyword that initiated this request.
3197: # $tail - Remainder of the tail. In this case that's a colon
3198: # separated list containing the query Id and the
3199: # results of the query.
3200: # $client - Socket open on the client.
3201: # Return:
3202: # 1 - Indicating that we should continue processing.
3203: # Side effects:
3204: # ok written to the client.
3205: #
3206: sub reply_query_handler {
3207: my ($cmd, $tail, $client) = @_;
3208:
3209:
3210: my $userinput = "$cmd:$tail";
3211:
3212: my ($id,$reply)=split(/:/,$tail);
3213: my $store;
3214: my $execdir=$perlvar{'lonDaemons'};
3215: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3216: $reply=~s/\&/\n/g;
3217: print $store $reply;
3218: close $store;
3219: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3220: print $store2 "done\n";
3221: close $store2;
3222: &Reply($client, "ok\n", $userinput);
3223: } else {
3224: &Failure($client, "error: ".($!+0)
3225: ." IO::File->new Failed ".
3226: "while attempting queryreply\n", $userinput);
3227: }
3228:
3229:
3230: return 1;
3231: }
3232: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3233:
3234: #
3235: # Process the courseidput request. Not quite sure what this means
3236: # at the system level sense. It appears a gdbm file in the
3237: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3238: # a set of entries made in that database.
3239: #
3240: # Parameters:
3241: # $cmd - The command keyword that initiated this request.
3242: # $tail - Tail of the command. In this case consists of a colon
3243: # separated list contaning the domain to apply this to and
3244: # an ampersand separated list of keyword=value pairs.
3245: # Each value is a colon separated list that includes:
3246: # description, institutional code and course owner.
3247: # For backward compatibility with versions included
3248: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3249: # code and/or course owner are preserved from the existing
3250: # record when writing a new record in response to 1.1 or
3251: # 1.2 implementations of lonnet::flushcourselogs().
3252: #
3253: # $client - Socket open on the client.
3254: # Returns:
3255: # 1 - indicating that processing should continue
3256: #
3257: # Side effects:
3258: # reply is written to the client.
3259: #
3260: sub put_course_id_handler {
3261: my ($cmd, $tail, $client) = @_;
3262:
3263:
3264: my $userinput = "$cmd:$tail";
3265:
3266: my ($udom, $what) = split(/:/, $tail,2);
3267: chomp($what);
3268: my $now=time;
3269: my @pairs=split(/\&/,$what);
3270:
3271: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3272: if ($hashref) {
3273: foreach my $pair (@pairs) {
3274: my ($key,$courseinfo) = split(/=/,$pair,2);
3275: $courseinfo =~ s/=/:/g;
3276: my @current_items = split(/:/,$hashref->{$key},-1);
3277: shift(@current_items); # remove description
3278: pop(@current_items); # remove last access
3279: my $numcurrent = scalar(@current_items);
3280: if ($numcurrent > 3) {
3281: $numcurrent = 3;
3282: }
3283: my @new_items = split(/:/,$courseinfo,-1);
3284: my $numnew = scalar(@new_items);
3285: if ($numcurrent > 0) {
3286: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3287: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3288: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3289: }
3290: }
3291: }
3292: $hashref->{$key}=$courseinfo.':'.$now;
3293: }
3294: if (&untie_domain_hash($hashref)) {
3295: &Reply( $client, "ok\n", $userinput);
3296: } else {
3297: &Failure($client, "error: ".($!+0)
3298: ." untie(GDBM) Failed ".
3299: "while attempting courseidput\n", $userinput);
3300: }
3301: } else {
3302: &Failure($client, "error: ".($!+0)
3303: ." tie(GDBM) Failed ".
3304: "while attempting courseidput\n", $userinput);
3305: }
3306:
3307:
3308: return 1;
3309: }
3310: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3311:
3312: # Retrieves the value of a course id resource keyword pattern
3313: # defined since a starting date. Both the starting date and the
3314: # keyword pattern are optional. If the starting date is not supplied it
3315: # is treated as the beginning of time. If the pattern is not found,
3316: # it is treatred as "." matching everything.
3317: #
3318: # Parameters:
3319: # $cmd - Command keyword that resulted in us being dispatched.
3320: # $tail - The remainder of the command that, in this case, consists
3321: # of a colon separated list of:
3322: # domain - The domain in which the course database is
3323: # defined.
3324: # since - Optional parameter describing the minimum
3325: # time of definition(?) of the resources that
3326: # will match the dump.
3327: # description - regular expression that is used to filter
3328: # the dump. Only keywords matching this regexp
3329: # will be used.
3330: # institutional code - optional supplied code to filter
3331: # the dump. Only courses with an institutional code
3332: # that match the supplied code will be returned.
3333: # owner - optional supplied username and domain of owner to
3334: # filter the dump. Only courses for which the course
3335: # owner matches the supplied username and/or domain
3336: # will be returned. Pre-2.2.0 legacy entries from
3337: # nohist_courseiddump will only contain usernames.
3338: # $client - The socket open on the client.
3339: # Returns:
3340: # 1 - Continue processing.
3341: # Side Effects:
3342: # a reply is written to $client.
3343: sub dump_course_id_handler {
3344: my ($cmd, $tail, $client) = @_;
3345:
3346: my $userinput = "$cmd:$tail";
3347:
3348: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3349: $typefilter,$regexp_ok) =split(/:/,$tail);
3350: if (defined($description)) {
3351: $description=&unescape($description);
3352: } else {
3353: $description='.';
3354: }
3355: if (defined($instcodefilter)) {
3356: $instcodefilter=&unescape($instcodefilter);
3357: } else {
3358: $instcodefilter='.';
3359: }
3360: my ($ownerunamefilter,$ownerdomfilter);
3361: if (defined($ownerfilter)) {
3362: $ownerfilter=&unescape($ownerfilter);
3363: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3364: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3365: $ownerunamefilter = $1;
3366: $ownerdomfilter = $2;
3367: } else {
3368: $ownerunamefilter = $ownerfilter;
3369: $ownerdomfilter = '';
3370: }
3371: }
3372: } else {
3373: $ownerfilter='.';
3374: }
3375:
3376: if (defined($coursefilter)) {
3377: $coursefilter=&unescape($coursefilter);
3378: } else {
3379: $coursefilter='.';
3380: }
3381: if (defined($typefilter)) {
3382: $typefilter=&unescape($typefilter);
3383: } else {
3384: $typefilter='.';
3385: }
3386: if (defined($regexp_ok)) {
3387: $regexp_ok=&unescape($regexp_ok);
3388: }
3389:
3390: unless (defined($since)) { $since=0; }
3391: my $qresult='';
3392: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3393: if ($hashref) {
3394: while (my ($key,$value) = each(%$hashref)) {
3395: my ($descr,$lasttime,$inst_code,$owner,$type);
3396: my @courseitems = split(/:/,$value);
3397: $lasttime = pop(@courseitems);
3398: ($descr,$inst_code,$owner,$type)=@courseitems;
3399: if ($lasttime<$since) { next; }
3400: my $match = 1;
3401: unless ($description eq '.') {
3402: my $unescapeDescr = &unescape($descr);
3403: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3404: $match = 0;
3405: }
3406: }
3407: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3408: my $unescapeInstcode = &unescape($inst_code);
3409: if ($regexp_ok) {
3410: unless (eval('$unescapeInstcode=~/$instcodefilter/')) {
3411: $match = 0;
3412: }
3413: } else {
3414: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3415: $match = 0;
3416: }
3417: }
3418: }
3419: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3420: my $unescapeOwner = &unescape($owner);
3421: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
3422: if ($unescapeOwner =~ /:/) {
3423: if (eval('$unescapeOwner !~
3424: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i')) {
3425: $match = 0;
3426: }
3427: } else {
3428: if (eval('$unescapeOwner!~/\Q$ownerunamefilter\E/i')) {
3429: $match = 0;
3430: }
3431: }
3432: } elsif ($ownerunamefilter ne '') {
3433: if ($unescapeOwner =~ /:/) {
3434: if (eval('$unescapeOwner!~/\Q$ownerunamefilter\E:[^:]+$/i')) {
3435: $match = 0;
3436: }
3437: } else {
3438: if (eval('$unescapeOwner!~/\Q$ownerunamefilter\E/i')) {
3439: $match = 0;
3440: }
3441: }
3442: } elsif ($ownerdomfilter ne '') {
3443: if ($unescapeOwner =~ /:/) {
3444: if (eval('$unescapeOwner!~/^[^:]+:\Q$ownerdomfilter\E/')) {
3445: $match = 0;
3446: }
3447: } else {
3448: if ($ownerdomfilter ne $udom) {
3449: $match = 0;
3450: }
3451: }
3452: }
3453: }
3454: unless ($coursefilter eq '.' || !defined($coursefilter)) {
3455: my $unescapeCourse = &unescape($key);
3456: unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {
3457: $match = 0;
3458: }
3459: }
3460: unless ($typefilter eq '.' || !defined($typefilter)) {
3461: my $unescapeType = &unescape($type);
3462: if ($type eq '') {
3463: if ($typefilter ne 'Course') {
3464: $match = 0;
3465: }
3466: } else {
3467: unless (eval('$unescapeType=~/^\Q$typefilter\E$/')) {
3468: $match = 0;
3469: }
3470: }
3471: }
3472: if ($match == 1) {
3473: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3474: }
3475: }
3476: if (&untie_domain_hash($hashref)) {
3477: chop($qresult);
3478: &Reply($client, "$qresult\n", $userinput);
3479: } else {
3480: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3481: "while attempting courseiddump\n", $userinput);
3482: }
3483: } else {
3484: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3485: "while attempting courseiddump\n", $userinput);
3486: }
3487:
3488:
3489: return 1;
3490: }
3491: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
3492:
3493: #
3494: # Puts an unencrypted entry in a namespace db file at the domain level
3495: #
3496: # Parameters:
3497: # $cmd - The command that got us here.
3498: # $tail - Tail of the command (remaining parameters).
3499: # $client - File descriptor connected to client.
3500: # Returns
3501: # 0 - Requested to exit, caller should shut down.
3502: # 1 - Continue processing.
3503: # Side effects:
3504: # reply is written to $client.
3505: #
3506: sub put_domain_handler {
3507: my ($cmd,$tail,$client) = @_;
3508:
3509: my $userinput = "$cmd:$tail";
3510:
3511: my ($udom,$namespace,$what) =split(/:/,$tail,3);
3512: chomp($what);
3513: my @pairs=split(/\&/,$what);
3514: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
3515: "P", $what);
3516: if ($hashref) {
3517: foreach my $pair (@pairs) {
3518: my ($key,$value)=split(/=/,$pair);
3519: $hashref->{$key}=$value;
3520: }
3521: if (&untie_domain_hash($hashref)) {
3522: &Reply($client, "ok\n", $userinput);
3523: } else {
3524: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3525: "while attempting putdom\n", $userinput);
3526: }
3527: } else {
3528: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3529: "while attempting putdom\n", $userinput);
3530: }
3531:
3532: return 1;
3533: }
3534: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
3535:
3536: # Unencrypted get from the namespace database file at the domain level.
3537: # This function retrieves a keyed item from a specific named database in the
3538: # domain directory.
3539: #
3540: # Parameters:
3541: # $cmd - Command request keyword (get).
3542: # $tail - Tail of the command. This is a colon separated list
3543: # consisting of the domain and the 'namespace'
3544: # which selects the gdbm file to do the lookup in,
3545: # & separated list of keys to lookup. Note that
3546: # the values are returned as an & separated list too.
3547: # $client - File descriptor open on the client.
3548: # Returns:
3549: # 1 - Continue processing.
3550: # 0 - Exit.
3551: # Side effects:
3552: # reply is written to $client.
3553: #
3554:
3555: sub get_domain_handler {
3556: my ($cmd, $tail, $client) = @_;
3557:
3558: my $userinput = "$client:$tail";
3559:
3560: my ($udom,$namespace,$what)=split(/:/,$tail,3);
3561: chomp($what);
3562: my @queries=split(/\&/,$what);
3563: my $qresult='';
3564: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
3565: if ($hashref) {
3566: for (my $i=0;$i<=$#queries;$i++) {
3567: $qresult.="$hashref->{$queries[$i]}&";
3568: }
3569: if (&untie_domain_hash($hashref)) {
3570: $qresult=~s/\&$//;
3571: &Reply($client, "$qresult\n", $userinput);
3572: } else {
3573: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3574: "while attempting getdom\n",$userinput);
3575: }
3576: } else {
3577: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3578: "while attempting getdom\n",$userinput);
3579: }
3580:
3581: return 1;
3582: }
3583: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
3584:
3585:
3586: #
3587: # Puts an id to a domains id database.
3588: #
3589: # Parameters:
3590: # $cmd - The command that triggered us.
3591: # $tail - Remainder of the request other than the command. This is a
3592: # colon separated list containing:
3593: # $domain - The domain for which we are writing the id.
3594: # $pairs - The id info to write... this is and & separated list
3595: # of keyword=value.
3596: # $client - Socket open on the client.
3597: # Returns:
3598: # 1 - Continue processing.
3599: # Side effects:
3600: # reply is written to $client.
3601: #
3602: sub put_id_handler {
3603: my ($cmd,$tail,$client) = @_;
3604:
3605:
3606: my $userinput = "$cmd:$tail";
3607:
3608: my ($udom,$what)=split(/:/,$tail);
3609: chomp($what);
3610: my @pairs=split(/\&/,$what);
3611: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3612: "P", $what);
3613: if ($hashref) {
3614: foreach my $pair (@pairs) {
3615: my ($key,$value)=split(/=/,$pair);
3616: $hashref->{$key}=$value;
3617: }
3618: if (&untie_domain_hash($hashref)) {
3619: &Reply($client, "ok\n", $userinput);
3620: } else {
3621: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3622: "while attempting idput\n", $userinput);
3623: }
3624: } else {
3625: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3626: "while attempting idput\n", $userinput);
3627: }
3628:
3629: return 1;
3630: }
3631: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
3632:
3633: #
3634: # Retrieves a set of id values from the id database.
3635: # Returns an & separated list of results, one for each requested id to the
3636: # client.
3637: #
3638: # Parameters:
3639: # $cmd - Command keyword that caused us to be dispatched.
3640: # $tail - Tail of the command. Consists of a colon separated:
3641: # domain - the domain whose id table we dump
3642: # ids Consists of an & separated list of
3643: # id keywords whose values will be fetched.
3644: # nonexisting keywords will have an empty value.
3645: # $client - Socket open on the client.
3646: #
3647: # Returns:
3648: # 1 - indicating processing should continue.
3649: # Side effects:
3650: # An & separated list of results is written to $client.
3651: #
3652: sub get_id_handler {
3653: my ($cmd, $tail, $client) = @_;
3654:
3655:
3656: my $userinput = "$client:$tail";
3657:
3658: my ($udom,$what)=split(/:/,$tail);
3659: chomp($what);
3660: my @queries=split(/\&/,$what);
3661: my $qresult='';
3662: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3663: if ($hashref) {
3664: for (my $i=0;$i<=$#queries;$i++) {
3665: $qresult.="$hashref->{$queries[$i]}&";
3666: }
3667: if (&untie_domain_hash($hashref)) {
3668: $qresult=~s/\&$//;
3669: &Reply($client, "$qresult\n", $userinput);
3670: } else {
3671: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3672: "while attempting idget\n",$userinput);
3673: }
3674: } else {
3675: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3676: "while attempting idget\n",$userinput);
3677: }
3678:
3679: return 1;
3680: }
3681: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
3682:
3683: #
3684: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
3685: #
3686: # Parameters
3687: # $cmd - Command keyword that caused us to be dispatched.
3688: # $tail - Tail of the command. Consists of a colon separated:
3689: # domain - the domain whose dcmail we are recording
3690: # email Consists of key=value pair
3691: # where key is unique msgid
3692: # and value is message (in XML)
3693: # $client - Socket open on the client.
3694: #
3695: # Returns:
3696: # 1 - indicating processing should continue.
3697: # Side effects
3698: # reply is written to $client.
3699: #
3700: sub put_dcmail_handler {
3701: my ($cmd,$tail,$client) = @_;
3702: my $userinput = "$cmd:$tail";
3703:
3704: my ($udom,$what)=split(/:/,$tail);
3705: chomp($what);
3706: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3707: if ($hashref) {
3708: my ($key,$value)=split(/=/,$what);
3709: $hashref->{$key}=$value;
3710: }
3711: if (&untie_domain_hash($hashref)) {
3712: &Reply($client, "ok\n", $userinput);
3713: } else {
3714: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3715: "while attempting dcmailput\n", $userinput);
3716: }
3717: return 1;
3718: }
3719: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3720:
3721: #
3722: # Retrieves broadcast e-mail from nohist_dcmail database
3723: # Returns to client an & separated list of key=value pairs,
3724: # where key is msgid and value is message information.
3725: #
3726: # Parameters
3727: # $cmd - Command keyword that caused us to be dispatched.
3728: # $tail - Tail of the command. Consists of a colon separated:
3729: # domain - the domain whose dcmail table we dump
3730: # startfilter - beginning of time window
3731: # endfilter - end of time window
3732: # sendersfilter - & separated list of username:domain
3733: # for senders to search for.
3734: # $client - Socket open on the client.
3735: #
3736: # Returns:
3737: # 1 - indicating processing should continue.
3738: # Side effects
3739: # reply (& separated list of msgid=messageinfo pairs) is
3740: # written to $client.
3741: #
3742: sub dump_dcmail_handler {
3743: my ($cmd, $tail, $client) = @_;
3744:
3745: my $userinput = "$cmd:$tail";
3746: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3747: chomp($sendersfilter);
3748: my @senders = ();
3749: if (defined($startfilter)) {
3750: $startfilter=&unescape($startfilter);
3751: } else {
3752: $startfilter='.';
3753: }
3754: if (defined($endfilter)) {
3755: $endfilter=&unescape($endfilter);
3756: } else {
3757: $endfilter='.';
3758: }
3759: if (defined($sendersfilter)) {
3760: $sendersfilter=&unescape($sendersfilter);
3761: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
3762: }
3763:
3764: my $qresult='';
3765: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3766: if ($hashref) {
3767: while (my ($key,$value) = each(%$hashref)) {
3768: my $match = 1;
3769: my ($timestamp,$subj,$uname,$udom) =
3770: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
3771: $subj = &unescape($subj);
3772: unless ($startfilter eq '.' || !defined($startfilter)) {
3773: if ($timestamp < $startfilter) {
3774: $match = 0;
3775: }
3776: }
3777: unless ($endfilter eq '.' || !defined($endfilter)) {
3778: if ($timestamp > $endfilter) {
3779: $match = 0;
3780: }
3781: }
3782: unless (@senders < 1) {
3783: unless (grep/^$uname:$udom$/,@senders) {
3784: $match = 0;
3785: }
3786: }
3787: if ($match == 1) {
3788: $qresult.=$key.'='.$value.'&';
3789: }
3790: }
3791: if (&untie_domain_hash($hashref)) {
3792: chop($qresult);
3793: &Reply($client, "$qresult\n", $userinput);
3794: } else {
3795: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3796: "while attempting dcmaildump\n", $userinput);
3797: }
3798: } else {
3799: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3800: "while attempting dcmaildump\n", $userinput);
3801: }
3802: return 1;
3803: }
3804:
3805: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3806:
3807: #
3808: # Puts domain roles in nohist_domainroles database
3809: #
3810: # Parameters
3811: # $cmd - Command keyword that caused us to be dispatched.
3812: # $tail - Tail of the command. Consists of a colon separated:
3813: # domain - the domain whose roles we are recording
3814: # role - Consists of key=value pair
3815: # where key is unique role
3816: # and value is start/end date information
3817: # $client - Socket open on the client.
3818: #
3819: # Returns:
3820: # 1 - indicating processing should continue.
3821: # Side effects
3822: # reply is written to $client.
3823: #
3824:
3825: sub put_domainroles_handler {
3826: my ($cmd,$tail,$client) = @_;
3827:
3828: my $userinput = "$cmd:$tail";
3829: my ($udom,$what)=split(/:/,$tail);
3830: chomp($what);
3831: my @pairs=split(/\&/,$what);
3832: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3833: if ($hashref) {
3834: foreach my $pair (@pairs) {
3835: my ($key,$value)=split(/=/,$pair);
3836: $hashref->{$key}=$value;
3837: }
3838: if (&untie_domain_hash($hashref)) {
3839: &Reply($client, "ok\n", $userinput);
3840: } else {
3841: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3842: "while attempting domroleput\n", $userinput);
3843: }
3844: } else {
3845: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3846: "while attempting domroleput\n", $userinput);
3847: }
3848:
3849: return 1;
3850: }
3851:
3852: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
3853:
3854: #
3855: # Retrieves domain roles from nohist_domainroles database
3856: # Returns to client an & separated list of key=value pairs,
3857: # where key is role and value is start and end date information.
3858: #
3859: # Parameters
3860: # $cmd - Command keyword that caused us to be dispatched.
3861: # $tail - Tail of the command. Consists of a colon separated:
3862: # domain - the domain whose domain roles table we dump
3863: # $client - Socket open on the client.
3864: #
3865: # Returns:
3866: # 1 - indicating processing should continue.
3867: # Side effects
3868: # reply (& separated list of role=start/end info pairs) is
3869: # written to $client.
3870: #
3871: sub dump_domainroles_handler {
3872: my ($cmd, $tail, $client) = @_;
3873:
3874: my $userinput = "$cmd:$tail";
3875: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
3876: chomp($rolesfilter);
3877: my @roles = ();
3878: if (defined($startfilter)) {
3879: $startfilter=&unescape($startfilter);
3880: } else {
3881: $startfilter='.';
3882: }
3883: if (defined($endfilter)) {
3884: $endfilter=&unescape($endfilter);
3885: } else {
3886: $endfilter='.';
3887: }
3888: if (defined($rolesfilter)) {
3889: $rolesfilter=&unescape($rolesfilter);
3890: @roles = split(/\&/,$rolesfilter);
3891: }
3892:
3893: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3894: if ($hashref) {
3895: my $qresult = '';
3896: while (my ($key,$value) = each(%$hashref)) {
3897: my $match = 1;
3898: my ($start,$end) = split(/:/,&unescape($value));
3899: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
3900: unless ($startfilter eq '.' || !defined($startfilter)) {
3901: if ($start >= $startfilter) {
3902: $match = 0;
3903: }
3904: }
3905: unless ($endfilter eq '.' || !defined($endfilter)) {
3906: if ($end <= $endfilter) {
3907: $match = 0;
3908: }
3909: }
3910: unless (@roles < 1) {
3911: unless (grep/^$trole$/,@roles) {
3912: $match = 0;
3913: }
3914: }
3915: if ($match == 1) {
3916: $qresult.=$key.'='.$value.'&';
3917: }
3918: }
3919: if (&untie_domain_hash($hashref)) {
3920: chop($qresult);
3921: &Reply($client, "$qresult\n", $userinput);
3922: } else {
3923: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3924: "while attempting domrolesdump\n", $userinput);
3925: }
3926: } else {
3927: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3928: "while attempting domrolesdump\n", $userinput);
3929: }
3930: return 1;
3931: }
3932:
3933: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
3934:
3935:
3936: # Process the tmpput command I'm not sure what this does.. Seems to
3937: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3938: # where Id is the client's ip concatenated with a sequence number.
3939: # The file will contain some value that is passed in. Is this e.g.
3940: # a login token?
3941: #
3942: # Parameters:
3943: # $cmd - The command that got us dispatched.
3944: # $tail - The remainder of the request following $cmd:
3945: # In this case this will be the contents of the file.
3946: # $client - Socket connected to the client.
3947: # Returns:
3948: # 1 indicating processing can continue.
3949: # Side effects:
3950: # A file is created in the local filesystem.
3951: # A reply is sent to the client.
3952: sub tmp_put_handler {
3953: my ($cmd, $what, $client) = @_;
3954:
3955: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3956:
3957: my ($record,$context) = split(/:/,$what);
3958: if ($context ne '') {
3959: chomp($context);
3960: $context = &unescape($context);
3961: }
3962: my ($id,$store);
3963: $tmpsnum++;
3964: if ($context eq 'resetpw') {
3965: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
3966: } else {
3967: $id = $$.'_'.$clientip.'_'.$tmpsnum;
3968: }
3969: $id=~s/\W/\_/g;
3970: $record=~s/\n//g;
3971: my $execdir=$perlvar{'lonDaemons'};
3972: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3973: print $store $record;
3974: close $store;
3975: &Reply($client, "$id\n", $userinput);
3976: } else {
3977: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3978: "while attempting tmpput\n", $userinput);
3979: }
3980: return 1;
3981:
3982: }
3983: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
3984:
3985: # Processes the tmpget command. This command returns the contents
3986: # of a temporary resource file(?) created via tmpput.
3987: #
3988: # Paramters:
3989: # $cmd - Command that got us dispatched.
3990: # $id - Tail of the command, contain the id of the resource
3991: # we want to fetch.
3992: # $client - socket open on the client.
3993: # Return:
3994: # 1 - Inidcating processing can continue.
3995: # Side effects:
3996: # A reply is sent to the client.
3997: #
3998: sub tmp_get_handler {
3999: my ($cmd, $id, $client) = @_;
4000:
4001: my $userinput = "$cmd:$id";
4002:
4003:
4004: $id=~s/\W/\_/g;
4005: my $store;
4006: my $execdir=$perlvar{'lonDaemons'};
4007: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4008: my $reply=<$store>;
4009: &Reply( $client, "$reply\n", $userinput);
4010: close $store;
4011: } else {
4012: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4013: "while attempting tmpget\n", $userinput);
4014: }
4015:
4016: return 1;
4017: }
4018: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
4019:
4020: #
4021: # Process the tmpdel command. This command deletes a temp resource
4022: # created by the tmpput command.
4023: #
4024: # Parameters:
4025: # $cmd - Command that got us here.
4026: # $id - Id of the temporary resource created.
4027: # $client - socket open on the client process.
4028: #
4029: # Returns:
4030: # 1 - Indicating processing should continue.
4031: # Side Effects:
4032: # A file is deleted
4033: # A reply is sent to the client.
4034: sub tmp_del_handler {
4035: my ($cmd, $id, $client) = @_;
4036:
4037: my $userinput= "$cmd:$id";
4038:
4039: chomp($id);
4040: $id=~s/\W/\_/g;
4041: my $execdir=$perlvar{'lonDaemons'};
4042: if (unlink("$execdir/tmp/$id.tmp")) {
4043: &Reply($client, "ok\n", $userinput);
4044: } else {
4045: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4046: "while attempting tmpdel\n", $userinput);
4047: }
4048:
4049: return 1;
4050:
4051: }
4052: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
4053:
4054: #
4055: # Processes the setannounce command. This command
4056: # creates a file named announce.txt in the top directory of
4057: # the documentn root and sets its contents. The announce.txt file is
4058: # printed in its entirety at the LonCAPA login page. Note:
4059: # once the announcement.txt fileis created it cannot be deleted.
4060: # However, setting the contents of the file to empty removes the
4061: # announcement from the login page of loncapa so who cares.
4062: #
4063: # Parameters:
4064: # $cmd - The command that got us dispatched.
4065: # $announcement - The text of the announcement.
4066: # $client - Socket open on the client process.
4067: # Retunrns:
4068: # 1 - Indicating request processing should continue
4069: # Side Effects:
4070: # The file {DocRoot}/announcement.txt is created.
4071: # A reply is sent to $client.
4072: #
4073: sub set_announce_handler {
4074: my ($cmd, $announcement, $client) = @_;
4075:
4076: my $userinput = "$cmd:$announcement";
4077:
4078: chomp($announcement);
4079: $announcement=&unescape($announcement);
4080: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4081: '/announcement.txt')) {
4082: print $store $announcement;
4083: close $store;
4084: &Reply($client, "ok\n", $userinput);
4085: } else {
4086: &Failure($client, "error: ".($!+0)."\n", $userinput);
4087: }
4088:
4089: return 1;
4090: }
4091: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
4092:
4093: #
4094: # Return the version of the daemon. This can be used to determine
4095: # the compatibility of cross version installations or, alternatively to
4096: # simply know who's out of date and who isn't. Note that the version
4097: # is returned concatenated with the tail.
4098: # Parameters:
4099: # $cmd - the request that dispatched to us.
4100: # $tail - Tail of the request (client's version?).
4101: # $client - Socket open on the client.
4102: #Returns:
4103: # 1 - continue processing requests.
4104: # Side Effects:
4105: # Replies with version to $client.
4106: sub get_version_handler {
4107: my ($cmd, $tail, $client) = @_;
4108:
4109: my $userinput = $cmd.$tail;
4110:
4111: &Reply($client, &version($userinput)."\n", $userinput);
4112:
4113:
4114: return 1;
4115: }
4116: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
4117:
4118: # Set the current host and domain. This is used to support
4119: # multihomed systems. Each IP of the system, or even separate daemons
4120: # on the same IP can be treated as handling a separate lonCAPA virtual
4121: # machine. This command selects the virtual lonCAPA. The client always
4122: # knows the right one since it is lonc and it is selecting the domain/system
4123: # from the hosts.tab file.
4124: # Parameters:
4125: # $cmd - Command that dispatched us.
4126: # $tail - Tail of the command (domain/host requested).
4127: # $socket - Socket open on the client.
4128: #
4129: # Returns:
4130: # 1 - Indicates the program should continue to process requests.
4131: # Side-effects:
4132: # The default domain/system context is modified for this daemon.
4133: # a reply is sent to the client.
4134: #
4135: sub set_virtual_host_handler {
4136: my ($cmd, $tail, $socket) = @_;
4137:
4138: my $userinput ="$cmd:$tail";
4139:
4140: &Reply($client, &sethost($userinput)."\n", $userinput);
4141:
4142:
4143: return 1;
4144: }
4145: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
4146:
4147: # Process a request to exit:
4148: # - "bye" is sent to the client.
4149: # - The client socket is shutdown and closed.
4150: # - We indicate to the caller that we should exit.
4151: # Formal Parameters:
4152: # $cmd - The command that got us here.
4153: # $tail - Tail of the command (empty).
4154: # $client - Socket open on the tail.
4155: # Returns:
4156: # 0 - Indicating the program should exit!!
4157: #
4158: sub exit_handler {
4159: my ($cmd, $tail, $client) = @_;
4160:
4161: my $userinput = "$cmd:$tail";
4162:
4163: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4164: &Reply($client, "bye\n", $userinput);
4165: $client->shutdown(2); # shutdown the socket forcibly.
4166: $client->close();
4167:
4168: return 0;
4169: }
4170: ®ister_handler("exit", \&exit_handler, 0,1,1);
4171: ®ister_handler("init", \&exit_handler, 0,1,1);
4172: ®ister_handler("quit", \&exit_handler, 0,1,1);
4173:
4174: # Determine if auto-enrollment is enabled.
4175: # Note that the original had what I believe to be a defect.
4176: # The original returned 0 if the requestor was not a registerd client.
4177: # It should return "refused".
4178: # Formal Parameters:
4179: # $cmd - The command that invoked us.
4180: # $tail - The tail of the command (Extra command parameters.
4181: # $client - The socket open on the client that issued the request.
4182: # Returns:
4183: # 1 - Indicating processing should continue.
4184: #
4185: sub enrollment_enabled_handler {
4186: my ($cmd, $tail, $client) = @_;
4187: my $userinput = $cmd.":".$tail; # For logging purposes.
4188:
4189:
4190: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4191:
4192: my $outcome = &localenroll::run($cdom);
4193: &Reply($client, "$outcome\n", $userinput);
4194:
4195: return 1;
4196: }
4197: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4198:
4199: # Get the official sections for which auto-enrollment is possible.
4200: # Since the admin people won't know about 'unofficial sections'
4201: # we cannot auto-enroll on them.
4202: # Formal Parameters:
4203: # $cmd - The command request that got us dispatched here.
4204: # $tail - The remainder of the request. In our case this
4205: # will be split into:
4206: # $coursecode - The course name from the admin point of view.
4207: # $cdom - The course's domain(?).
4208: # $client - Socket open on the client.
4209: # Returns:
4210: # 1 - Indiciting processing should continue.
4211: #
4212: sub get_sections_handler {
4213: my ($cmd, $tail, $client) = @_;
4214: my $userinput = "$cmd:$tail";
4215:
4216: my ($coursecode, $cdom) = split(/:/, $tail);
4217: my @secs = &localenroll::get_sections($coursecode,$cdom);
4218: my $seclist = &escape(join(':',@secs));
4219:
4220: &Reply($client, "$seclist\n", $userinput);
4221:
4222:
4223: return 1;
4224: }
4225: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4226:
4227: # Validate the owner of a new course section.
4228: #
4229: # Formal Parameters:
4230: # $cmd - Command that got us dispatched.
4231: # $tail - the remainder of the command. For us this consists of a
4232: # colon separated string containing:
4233: # $inst - Course Id from the institutions point of view.
4234: # $owner - Proposed owner of the course.
4235: # $cdom - Domain of the course (from the institutions
4236: # point of view?)..
4237: # $client - Socket open on the client.
4238: #
4239: # Returns:
4240: # 1 - Processing should continue.
4241: #
4242: sub validate_course_owner_handler {
4243: my ($cmd, $tail, $client) = @_;
4244: my $userinput = "$cmd:$tail";
4245: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4246:
4247: $owner = &unescape($owner);
4248: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4249: &Reply($client, "$outcome\n", $userinput);
4250:
4251:
4252:
4253: return 1;
4254: }
4255: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
4256:
4257: #
4258: # Validate a course section in the official schedule of classes
4259: # from the institutions point of view (part of autoenrollment).
4260: #
4261: # Formal Parameters:
4262: # $cmd - The command request that got us dispatched.
4263: # $tail - The tail of the command. In this case,
4264: # this is a colon separated set of words that will be split
4265: # into:
4266: # $inst_course_id - The course/section id from the
4267: # institutions point of view.
4268: # $cdom - The domain from the institutions
4269: # point of view.
4270: # $client - Socket open on the client.
4271: # Returns:
4272: # 1 - Indicating processing should continue.
4273: #
4274: sub validate_course_section_handler {
4275: my ($cmd, $tail, $client) = @_;
4276: my $userinput = "$cmd:$tail";
4277: my ($inst_course_id, $cdom) = split(/:/, $tail);
4278:
4279: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4280: &Reply($client, "$outcome\n", $userinput);
4281:
4282:
4283: return 1;
4284: }
4285: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4286:
4287: #
4288: # Validate course owner's access to enrollment data for specific class section.
4289: #
4290: #
4291: # Formal Parameters:
4292: # $cmd - The command request that got us dispatched.
4293: # $tail - The tail of the command. In this case this is a colon separated
4294: # set of words that will be split into:
4295: # $inst_class - Institutional code for the specific class section
4296: # $courseowner - The escaped username:domain of the course owner
4297: # $cdom - The domain of the course from the institution's
4298: # point of view.
4299: # $client - The socket open on the client.
4300: # Returns:
4301: # 1 - continue processing.
4302: #
4303:
4304: sub validate_class_access_handler {
4305: my ($cmd, $tail, $client) = @_;
4306: my $userinput = "$cmd:$tail";
4307: my ($inst_class,$courseowner,$cdom) = split(/:/, $tail);
4308: $courseowner = &unescape($courseowner);
4309: my $outcome;
4310: eval {
4311: local($SIG{__DIE__})='DEFAULT';
4312: $outcome=&localenroll::check_section($inst_class,$courseowner,$cdom);
4313: };
4314: &Reply($client,"$outcome\n", $userinput);
4315:
4316: return 1;
4317: }
4318: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
4319:
4320: #
4321: # Create a password for a new LON-CAPA user added by auto-enrollment.
4322: # Only used for case where authentication method for new user is localauth
4323: #
4324: # Formal Parameters:
4325: # $cmd - The command request that got us dispatched.
4326: # $tail - The tail of the command. In this case this is a colon separated
4327: # set of words that will be split into:
4328: # $authparam - An authentication parameter (localauth parameter).
4329: # $cdom - The domain of the course from the institution's
4330: # point of view.
4331: # $client - The socket open on the client.
4332: # Returns:
4333: # 1 - continue processing.
4334: #
4335: sub create_auto_enroll_password_handler {
4336: my ($cmd, $tail, $client) = @_;
4337: my $userinput = "$cmd:$tail";
4338:
4339: my ($authparam, $cdom) = split(/:/, $userinput);
4340:
4341: my ($create_passwd,$authchk);
4342: ($authparam,
4343: $create_passwd,
4344: $authchk) = &localenroll::create_password($authparam,$cdom);
4345:
4346: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4347: $userinput);
4348:
4349:
4350: return 1;
4351: }
4352: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4353: 0, 1, 0);
4354:
4355: # Retrieve and remove temporary files created by/during autoenrollment.
4356: #
4357: # Formal Parameters:
4358: # $cmd - The command that got us dispatched.
4359: # $tail - The tail of the command. In our case this is a colon
4360: # separated list that will be split into:
4361: # $filename - The name of the file to remove.
4362: # The filename is given as a path relative to
4363: # the LonCAPA temp file directory.
4364: # $client - Socket open on the client.
4365: #
4366: # Returns:
4367: # 1 - Continue processing.
4368: sub retrieve_auto_file_handler {
4369: my ($cmd, $tail, $client) = @_;
4370: my $userinput = "cmd:$tail";
4371:
4372: my ($filename) = split(/:/, $tail);
4373:
4374: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4375: if ( (-e $source) && ($filename ne '') ) {
4376: my $reply = '';
4377: if (open(my $fh,$source)) {
4378: while (<$fh>) {
4379: chomp($_);
4380: $_ =~ s/^\s+//g;
4381: $_ =~ s/\s+$//g;
4382: $reply .= $_;
4383: }
4384: close($fh);
4385: &Reply($client, &escape($reply)."\n", $userinput);
4386:
4387: # Does this have to be uncommented??!? (RF).
4388: #
4389: # unlink($source);
4390: } else {
4391: &Failure($client, "error\n", $userinput);
4392: }
4393: } else {
4394: &Failure($client, "error\n", $userinput);
4395: }
4396:
4397:
4398: return 1;
4399: }
4400: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4401:
4402: #
4403: # Read and retrieve institutional code format (for support form).
4404: # Formal Parameters:
4405: # $cmd - Command that dispatched us.
4406: # $tail - Tail of the command. In this case it conatins
4407: # the course domain and the coursename.
4408: # $client - Socket open on the client.
4409: # Returns:
4410: # 1 - Continue processing.
4411: #
4412: sub get_institutional_code_format_handler {
4413: my ($cmd, $tail, $client) = @_;
4414: my $userinput = "$cmd:$tail";
4415:
4416: my $reply;
4417: my($cdom,$course) = split(/:/,$tail);
4418: my @pairs = split/\&/,$course;
4419: my %instcodes = ();
4420: my %codes = ();
4421: my @codetitles = ();
4422: my %cat_titles = ();
4423: my %cat_order = ();
4424: foreach (@pairs) {
4425: my ($key,$value) = split/=/,$_;
4426: $instcodes{&unescape($key)} = &unescape($value);
4427: }
4428: my $formatreply = &localenroll::instcode_format($cdom,
4429: \%instcodes,
4430: \%codes,
4431: \@codetitles,
4432: \%cat_titles,
4433: \%cat_order);
4434: if ($formatreply eq 'ok') {
4435: my $codes_str = &Apache::lonnet::hash2str(%codes);
4436: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
4437: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
4438: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
4439: &Reply($client,
4440: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4441: .$cat_order_str."\n",
4442: $userinput);
4443: } else {
4444: # this else branch added by RF since if not ok, lonc will
4445: # hang waiting on reply until timeout.
4446: #
4447: &Reply($client, "format_error\n", $userinput);
4448: }
4449:
4450: return 1;
4451: }
4452: ®ister_handler("autoinstcodeformat",
4453: \&get_institutional_code_format_handler,0,1,0);
4454:
4455: sub get_institutional_defaults_handler {
4456: my ($cmd, $tail, $client) = @_;
4457: my $userinput = "$cmd:$tail";
4458:
4459: my $dom = $tail;
4460: my %defaults_hash;
4461: my @code_order;
4462: my $outcome;
4463: eval {
4464: local($SIG{__DIE__})='DEFAULT';
4465: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
4466: \@code_order);
4467: };
4468: if (!$@) {
4469: if ($outcome eq 'ok') {
4470: my $result='';
4471: while (my ($key,$value) = each(%defaults_hash)) {
4472: $result.=&escape($key).'='.&escape($value).'&';
4473: }
4474: $result .= 'code_order='.&escape(join('&',@code_order));
4475: &Reply($client,$result."\n",$userinput);
4476: } else {
4477: &Reply($client,"error\n", $userinput);
4478: }
4479: } else {
4480: &Failure($client,"unknown_cmd\n",$userinput);
4481: }
4482: }
4483: ®ister_handler("autoinstcodedefaults",
4484: \&get_institutional_defaults_handler,0,1,0);
4485:
4486:
4487: # Get domain specific conditions for import of student photographs to a course
4488: #
4489: # Retrieves information from photo_permission subroutine in localenroll.
4490: # Returns outcome (ok) if no processing errors, and whether course owner is
4491: # required to accept conditions of use (yes/no).
4492: #
4493: #
4494: sub photo_permission_handler {
4495: my ($cmd, $tail, $client) = @_;
4496: my $userinput = "$cmd:$tail";
4497: my $cdom = $tail;
4498: my ($perm_reqd,$conditions);
4499: my $outcome;
4500: eval {
4501: local($SIG{__DIE__})='DEFAULT';
4502: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
4503: \$conditions);
4504: };
4505: if (!$@) {
4506: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
4507: $userinput);
4508: } else {
4509: &Failure($client,"unknown_cmd\n",$userinput);
4510: }
4511: return 1;
4512: }
4513: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
4514:
4515: #
4516: # Checks if student photo is available for a user in the domain, in the user's
4517: # directory (in /userfiles/internal/studentphoto.jpg).
4518: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
4519: # the student's photo.
4520:
4521: sub photo_check_handler {
4522: my ($cmd, $tail, $client) = @_;
4523: my $userinput = "$cmd:$tail";
4524: my ($udom,$uname,$pid) = split(/:/,$tail);
4525: $udom = &unescape($udom);
4526: $uname = &unescape($uname);
4527: $pid = &unescape($pid);
4528: my $path=&propath($udom,$uname).'/userfiles/internal/';
4529: if (!-e $path) {
4530: &mkpath($path);
4531: }
4532: my $response;
4533: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
4534: $result .= ':'.$response;
4535: &Reply($client, &escape($result)."\n",$userinput);
4536: return 1;
4537: }
4538: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
4539:
4540: #
4541: # Retrieve information from localenroll about whether to provide a button
4542: # for users who have enbled import of student photos to initiate an
4543: # update of photo files for registered students. Also include
4544: # comment to display alongside button.
4545:
4546: sub photo_choice_handler {
4547: my ($cmd, $tail, $client) = @_;
4548: my $userinput = "$cmd:$tail";
4549: my $cdom = &unescape($tail);
4550: my ($update,$comment);
4551: eval {
4552: local($SIG{__DIE__})='DEFAULT';
4553: ($update,$comment) = &localenroll::manager_photo_update($cdom);
4554: };
4555: if (!$@) {
4556: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
4557: } else {
4558: &Failure($client,"unknown_cmd\n",$userinput);
4559: }
4560: return 1;
4561: }
4562: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
4563:
4564: #
4565: # Gets a student's photo to exist (in the correct image type) in the user's
4566: # directory.
4567: # Formal Parameters:
4568: # $cmd - The command request that got us dispatched.
4569: # $tail - A colon separated set of words that will be split into:
4570: # $domain - student's domain
4571: # $uname - student username
4572: # $type - image type desired
4573: # $client - The socket open on the client.
4574: # Returns:
4575: # 1 - continue processing.
4576:
4577: sub student_photo_handler {
4578: my ($cmd, $tail, $client) = @_;
4579: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
4580:
4581: my $path=&propath($domain,$uname). '/userfiles/internal/';
4582: my $filename = 'studentphoto.'.$ext;
4583: if ($type eq 'thumbnail') {
4584: $filename = 'studentphoto_tn.'.$ext;
4585: }
4586: if (-e $path.$filename) {
4587: &Reply($client,"ok\n","$cmd:$tail");
4588: return 1;
4589: }
4590: &mkpath($path);
4591: my $file;
4592: if ($type eq 'thumbnail') {
4593: eval {
4594: local($SIG{__DIE__})='DEFAULT';
4595: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
4596: };
4597: } else {
4598: $file=&localstudentphoto::fetch($domain,$uname);
4599: }
4600: if (!$file) {
4601: &Failure($client,"unavailable\n","$cmd:$tail");
4602: return 1;
4603: }
4604: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
4605: if (-e $path.$filename) {
4606: &Reply($client,"ok\n","$cmd:$tail");
4607: return 1;
4608: }
4609: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4610: return 1;
4611: }
4612: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
4613:
4614: sub inst_usertypes_handler {
4615: my ($cmd, $domain, $client) = @_;
4616: my $res;
4617: my $userinput = $cmd.":".$domain; # For logging purposes.
4618: my (%typeshash,@order,$result);
4619: eval {
4620: local($SIG{__DIE__})='DEFAULT';
4621: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
4622: };
4623: if ($result eq 'ok') {
4624: if (keys(%typeshash) > 0) {
4625: foreach my $key (keys(%typeshash)) {
4626: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
4627: }
4628: }
4629: $res=~s/\&$//;
4630: $res .= ':';
4631: if (@order > 0) {
4632: foreach my $item (@order) {
4633: $res .= &escape($item).'&';
4634: }
4635: }
4636: $res=~s/\&$//;
4637: }
4638: &Reply($client, "$res\n", $userinput);
4639: return 1;
4640: }
4641: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
4642:
4643: # mkpath makes all directories for a file, expects an absolute path with a
4644: # file or a trailing / if just a dir is passed
4645: # returns 1 on success 0 on failure
4646: sub mkpath {
4647: my ($file)=@_;
4648: my @parts=split(/\//,$file,-1);
4649: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4650: for (my $i=3;$i<= ($#parts-1);$i++) {
4651: $now.='/'.$parts[$i];
4652: if (!-e $now) {
4653: if (!mkdir($now,0770)) { return 0; }
4654: }
4655: }
4656: return 1;
4657: }
4658:
4659: #---------------------------------------------------------------
4660: #
4661: # Getting, decoding and dispatching requests:
4662: #
4663: #
4664: # Get a Request:
4665: # Gets a Request message from the client. The transaction
4666: # is defined as a 'line' of text. We remove the new line
4667: # from the text line.
4668: #
4669: sub get_request {
4670: my $input = <$client>;
4671: chomp($input);
4672:
4673: &Debug("get_request: Request = $input\n");
4674:
4675: &status('Processing '.$clientname.':'.$input);
4676:
4677: return $input;
4678: }
4679: #---------------------------------------------------------------
4680: #
4681: # Process a request. This sub should shrink as each action
4682: # gets farmed out into a separat sub that is registered
4683: # with the dispatch hash.
4684: #
4685: # Parameters:
4686: # user_input - The request received from the client (lonc).
4687: # Returns:
4688: # true to keep processing, false if caller should exit.
4689: #
4690: sub process_request {
4691: my ($userinput) = @_; # Easier for now to break style than to
4692: # fix all the userinput -> user_input.
4693: my $wasenc = 0; # True if request was encrypted.
4694: # ------------------------------------------------------------ See if encrypted
4695: # for command
4696: # sethost:<server>
4697: # <command>:<args>
4698: # we just send it to the processor
4699: # for
4700: # sethost:<server>:<command>:<args>
4701: # we do the implict set host and then do the command
4702: if ($userinput =~ /^sethost:/) {
4703: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
4704: if (defined($userinput)) {
4705: &sethost("$cmd:$newid");
4706: } else {
4707: $userinput = "$cmd:$newid";
4708: }
4709: }
4710:
4711: if ($userinput =~ /^enc/) {
4712: $userinput = decipher($userinput);
4713: $wasenc=1;
4714: if(!$userinput) { # Cipher not defined.
4715: &Failure($client, "error: Encrypted data without negotated key\n");
4716: return 0;
4717: }
4718: }
4719: Debug("process_request: $userinput\n");
4720:
4721: #
4722: # The 'correct way' to add a command to lond is now to
4723: # write a sub to execute it and Add it to the command dispatch
4724: # hash via a call to register_handler.. The comments to that
4725: # sub should give you enough to go on to show how to do this
4726: # along with the examples that are building up as this code
4727: # is getting refactored. Until all branches of the
4728: # if/elseif monster below have been factored out into
4729: # separate procesor subs, if the dispatch hash is missing
4730: # the command keyword, we will fall through to the remainder
4731: # of the if/else chain below in order to keep this thing in
4732: # working order throughout the transmogrification.
4733:
4734: my ($command, $tail) = split(/:/, $userinput, 2);
4735: chomp($command);
4736: chomp($tail);
4737: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
4738: $command =~ s/(\r)//; # And this too for parameterless commands.
4739: if(!$tail) {
4740: $tail =""; # defined but blank.
4741: }
4742:
4743: &Debug("Command received: $command, encoded = $wasenc");
4744:
4745: if(defined $Dispatcher{$command}) {
4746:
4747: my $dispatch_info = $Dispatcher{$command};
4748: my $handler = $$dispatch_info[0];
4749: my $need_encode = $$dispatch_info[1];
4750: my $client_types = $$dispatch_info[2];
4751: Debug("Matched dispatch hash: mustencode: $need_encode "
4752: ."ClientType $client_types");
4753:
4754: # Validate the request:
4755:
4756: my $ok = 1;
4757: my $requesterprivs = 0;
4758: if(&isClient()) {
4759: $requesterprivs |= $CLIENT_OK;
4760: }
4761: if(&isManager()) {
4762: $requesterprivs |= $MANAGER_OK;
4763: }
4764: if($need_encode && (!$wasenc)) {
4765: Debug("Must encode but wasn't: $need_encode $wasenc");
4766: $ok = 0;
4767: }
4768: if(($client_types & $requesterprivs) == 0) {
4769: Debug("Client not privileged to do this operation");
4770: $ok = 0;
4771: }
4772:
4773: if($ok) {
4774: Debug("Dispatching to handler $command $tail");
4775: my $keep_going = &$handler($command, $tail, $client);
4776: return $keep_going;
4777: } else {
4778: Debug("Refusing to dispatch because client did not match requirements");
4779: Failure($client, "refused\n", $userinput);
4780: return 1;
4781: }
4782:
4783: }
4784:
4785: print $client "unknown_cmd\n";
4786: # -------------------------------------------------------------------- complete
4787: Debug("process_request - returning 1");
4788: return 1;
4789: }
4790: #
4791: # Decipher encoded traffic
4792: # Parameters:
4793: # input - Encoded data.
4794: # Returns:
4795: # Decoded data or undef if encryption key was not yet negotiated.
4796: # Implicit input:
4797: # cipher - This global holds the negotiated encryption key.
4798: #
4799: sub decipher {
4800: my ($input) = @_;
4801: my $output = '';
4802:
4803:
4804: if($cipher) {
4805: my($enc, $enclength, $encinput) = split(/:/, $input);
4806: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4807: $output .=
4808: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4809: }
4810: return substr($output, 0, $enclength);
4811: } else {
4812: return undef;
4813: }
4814: }
4815:
4816: #
4817: # Register a command processor. This function is invoked to register a sub
4818: # to process a request. Once registered, the ProcessRequest sub can automatically
4819: # dispatch requests to an appropriate sub, and do the top level validity checking
4820: # as well:
4821: # - Is the keyword recognized.
4822: # - Is the proper client type attempting the request.
4823: # - Is the request encrypted if it has to be.
4824: # Parameters:
4825: # $request_name - Name of the request being registered.
4826: # This is the command request that will match
4827: # against the hash keywords to lookup the information
4828: # associated with the dispatch information.
4829: # $procedure - Reference to a sub to call to process the request.
4830: # All subs get called as follows:
4831: # Procedure($cmd, $tail, $replyfd, $key)
4832: # $cmd - the actual keyword that invoked us.
4833: # $tail - the tail of the request that invoked us.
4834: # $replyfd- File descriptor connected to the client
4835: # $must_encode - True if the request must be encoded to be good.
4836: # $client_ok - True if it's ok for a client to request this.
4837: # $manager_ok - True if it's ok for a manager to request this.
4838: # Side effects:
4839: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4840: # - On failure, the program will die as it's a bad internal bug to try to
4841: # register a duplicate command handler.
4842: #
4843: sub register_handler {
4844: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
4845:
4846: # Don't allow duplication#
4847:
4848: if (defined $Dispatcher{$request_name}) {
4849: die "Attempting to define a duplicate request handler for $request_name\n";
4850: }
4851: # Build the client type mask:
4852:
4853: my $client_type_mask = 0;
4854: if($client_ok) {
4855: $client_type_mask |= $CLIENT_OK;
4856: }
4857: if($manager_ok) {
4858: $client_type_mask |= $MANAGER_OK;
4859: }
4860:
4861: # Enter the hash:
4862:
4863: my @entry = ($procedure, $must_encode, $client_type_mask);
4864:
4865: $Dispatcher{$request_name} = \@entry;
4866:
4867: }
4868:
4869:
4870: #------------------------------------------------------------------
4871:
4872:
4873:
4874:
4875: #
4876: # Convert an error return code from lcpasswd to a string value.
4877: #
4878: sub lcpasswdstrerror {
4879: my $ErrorCode = shift;
4880: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
4881: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4882: } else {
4883: return $passwderrors[$ErrorCode];
4884: }
4885: }
4886:
4887: #
4888: # Convert an error return code from lcuseradd to a string value:
4889: #
4890: sub lcuseraddstrerror {
4891: my $ErrorCode = shift;
4892: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4893: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4894: } else {
4895: return $adderrors[$ErrorCode];
4896: }
4897: }
4898:
4899: # grabs exception and records it to log before exiting
4900: sub catchexception {
4901: my ($error)=@_;
4902: $SIG{'QUIT'}='DEFAULT';
4903: $SIG{__DIE__}='DEFAULT';
4904: &status("Catching exception");
4905: &logthis("<font color='red'>CRITICAL: "
4906: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
4907: ."a crash with this error msg->[$error]</font>");
4908: &logthis('Famous last words: '.$status.' - '.$lastlog);
4909: if ($client) { print $client "error: $error\n"; }
4910: $server->close();
4911: die($error);
4912: }
4913: sub timeout {
4914: &status("Handling Timeout");
4915: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
4916: &catchexception('Timeout');
4917: }
4918: # -------------------------------- Set signal handlers to record abnormal exits
4919:
4920:
4921: $SIG{'QUIT'}=\&catchexception;
4922: $SIG{__DIE__}=\&catchexception;
4923:
4924: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
4925: &status("Read loncapa.conf and loncapa_apache.conf");
4926: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
4927: %perlvar=%{$perlvarref};
4928: undef $perlvarref;
4929:
4930: # ----------------------------- Make sure this process is running from user=www
4931: my $wwwid=getpwnam('www');
4932: if ($wwwid!=$<) {
4933: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4934: my $subj="LON: $currenthostid User ID mismatch";
4935: system("echo 'User ID mismatch. lond must be run as user www.' |\
4936: mailto $emailto -s '$subj' > /dev/null");
4937: exit 1;
4938: }
4939:
4940: # --------------------------------------------- Check if other instance running
4941:
4942: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4943:
4944: if (-e $pidfile) {
4945: my $lfh=IO::File->new("$pidfile");
4946: my $pide=<$lfh>;
4947: chomp($pide);
4948: if (kill 0 => $pide) { die "already running"; }
4949: }
4950:
4951: # ------------------------------------------------------------- Read hosts file
4952:
4953:
4954:
4955: # establish SERVER socket, bind and listen.
4956: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4957: Type => SOCK_STREAM,
4958: Proto => 'tcp',
4959: Reuse => 1,
4960: Listen => 10 )
4961: or die "making socket: $@\n";
4962:
4963: # --------------------------------------------------------- Do global variables
4964:
4965: # global variables
4966:
4967: my %children = (); # keys are current child process IDs
4968:
4969: sub REAPER { # takes care of dead children
4970: $SIG{CHLD} = \&REAPER;
4971: &status("Handling child death");
4972: my $pid;
4973: do {
4974: $pid = waitpid(-1,&WNOHANG());
4975: if (defined($children{$pid})) {
4976: &logthis("Child $pid died");
4977: delete($children{$pid});
4978: } elsif ($pid > 0) {
4979: &logthis("Unknown Child $pid died");
4980: }
4981: } while ( $pid > 0 );
4982: foreach my $child (keys(%children)) {
4983: $pid = waitpid($child,&WNOHANG());
4984: if ($pid > 0) {
4985: &logthis("Child $child - $pid looks like we missed it's death");
4986: delete($children{$pid});
4987: }
4988: }
4989: &status("Finished Handling child death");
4990: }
4991:
4992: sub HUNTSMAN { # signal handler for SIGINT
4993: &status("Killing children (INT)");
4994: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4995: kill 'INT' => keys %children;
4996: &logthis("Free socket: ".shutdown($server,2)); # free up socket
4997: my $execdir=$perlvar{'lonDaemons'};
4998: unlink("$execdir/logs/lond.pid");
4999: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
5000: &status("Done killing children");
5001: exit; # clean up with dignity
5002: }
5003:
5004: sub HUPSMAN { # signal handler for SIGHUP
5005: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5006: &status("Killing children for restart (HUP)");
5007: kill 'INT' => keys %children;
5008: &logthis("Free socket: ".shutdown($server,2)); # free up socket
5009: &logthis("<font color='red'>CRITICAL: Restarting</font>");
5010: my $execdir=$perlvar{'lonDaemons'};
5011: unlink("$execdir/logs/lond.pid");
5012: &status("Restarting self (HUP)");
5013: exec("$execdir/lond"); # here we go again
5014: }
5015:
5016: #
5017: # Reload the Apache daemon's state.
5018: # This is done by invoking /home/httpd/perl/apachereload
5019: # a setuid perl script that can be root for us to do this job.
5020: #
5021: sub ReloadApache {
5022: my $execdir = $perlvar{'lonDaemons'};
5023: my $script = $execdir."/apachereload";
5024: system($script);
5025: }
5026:
5027: #
5028: # Called in response to a USR2 signal.
5029: # - Reread hosts.tab
5030: # - All children connected to hosts that were removed from hosts.tab
5031: # are killed via SIGINT
5032: # - All children connected to previously existing hosts are sent SIGUSR1
5033: # - Our internal hosts hash is updated to reflect the new contents of
5034: # hosts.tab causing connections from hosts added to hosts.tab to
5035: # now be honored.
5036: #
5037: sub UpdateHosts {
5038: &status("Reload hosts.tab");
5039: logthis('<font color="blue"> Updating connections </font>');
5040: #
5041: # The %children hash has the set of IP's we currently have children
5042: # on. These need to be matched against records in the hosts.tab
5043: # Any ip's no longer in the table get killed off they correspond to
5044: # either dropped or changed hosts. Note that the re-read of the table
5045: # will take care of new and changed hosts as connections come into being.
5046:
5047: &Apache::lonnet::reset_hosts_info();
5048:
5049: foreach my $child (keys(%children)) {
5050: my $childip = $children{$child};
5051: if ($childip ne '127.0.0.1'
5052: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
5053: logthis('<font color="blue"> UpdateHosts killing child '
5054: ." $child for ip $childip </font>");
5055: kill('INT', $child);
5056: } else {
5057: logthis('<font color="green"> keeping child for ip '
5058: ." $childip (pid=$child) </font>");
5059: }
5060: }
5061: ReloadApache;
5062: &status("Finished reloading hosts.tab");
5063: }
5064:
5065:
5066: sub checkchildren {
5067: &status("Checking on the children (sending signals)");
5068: &initnewstatus();
5069: &logstatus();
5070: &logthis('Going to check on the children');
5071: my $docdir=$perlvar{'lonDocRoot'};
5072: foreach (sort keys %children) {
5073: #sleep 1;
5074: unless (kill 'USR1' => $_) {
5075: &logthis ('Child '.$_.' is dead');
5076: &logstatus($$.' is dead');
5077: delete($children{$_});
5078: }
5079: }
5080: sleep 5;
5081: $SIG{ALRM} = sub { Debug("timeout");
5082: die "timeout"; };
5083: $SIG{__DIE__} = 'DEFAULT';
5084: &status("Checking on the children (waiting for reports)");
5085: foreach (sort keys %children) {
5086: unless (-e "$docdir/lon-status/londchld/$_.txt") {
5087: eval {
5088: alarm(300);
5089: &logthis('Child '.$_.' did not respond');
5090: kill 9 => $_;
5091: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5092: #$subj="LON: $currenthostid killed lond process $_";
5093: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
5094: #$execdir=$perlvar{'lonDaemons'};
5095: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
5096: delete($children{$_});
5097: alarm(0);
5098: }
5099: }
5100: }
5101: $SIG{ALRM} = 'DEFAULT';
5102: $SIG{__DIE__} = \&catchexception;
5103: &status("Finished checking children");
5104: &logthis('Finished Checking children');
5105: }
5106:
5107: # --------------------------------------------------------------------- Logging
5108:
5109: sub logthis {
5110: my $message=shift;
5111: my $execdir=$perlvar{'lonDaemons'};
5112: my $fh=IO::File->new(">>$execdir/logs/lond.log");
5113: my $now=time;
5114: my $local=localtime($now);
5115: $lastlog=$local.': '.$message;
5116: print $fh "$local ($$): $message\n";
5117: }
5118:
5119: # ------------------------- Conditional log if $DEBUG true.
5120: sub Debug {
5121: my $message = shift;
5122: if($DEBUG) {
5123: &logthis($message);
5124: }
5125: }
5126:
5127: #
5128: # Sub to do replies to client.. this gives a hook for some
5129: # debug tracing too:
5130: # Parameters:
5131: # fd - File open on client.
5132: # reply - Text to send to client.
5133: # request - Original request from client.
5134: #
5135: sub Reply {
5136: my ($fd, $reply, $request) = @_;
5137: print $fd $reply;
5138: Debug("Request was $request Reply was $reply");
5139:
5140: $Transactions++;
5141: }
5142:
5143:
5144: #
5145: # Sub to report a failure.
5146: # This function:
5147: # - Increments the failure statistic counters.
5148: # - Invokes Reply to send the error message to the client.
5149: # Parameters:
5150: # fd - File descriptor open on the client
5151: # reply - Reply text to emit.
5152: # request - The original request message (used by Reply
5153: # to debug if that's enabled.
5154: # Implicit outputs:
5155: # $Failures- The number of failures is incremented.
5156: # Reply (invoked here) sends a message to the
5157: # client:
5158: #
5159: sub Failure {
5160: my $fd = shift;
5161: my $reply = shift;
5162: my $request = shift;
5163:
5164: $Failures++;
5165: Reply($fd, $reply, $request); # That's simple eh?
5166: }
5167: # ------------------------------------------------------------------ Log status
5168:
5169: sub logstatus {
5170: &status("Doing logging");
5171: my $docdir=$perlvar{'lonDocRoot'};
5172: {
5173: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
5174: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
5175: $fh->close();
5176: }
5177: &status("Finished $$.txt");
5178: {
5179: open(LOG,">>$docdir/lon-status/londstatus.txt");
5180: flock(LOG,LOCK_EX);
5181: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
5182: .$status."\t".$lastlog."\t $keymode\n";
5183: flock(LOG,LOCK_UN);
5184: close(LOG);
5185: }
5186: &status("Finished logging");
5187: }
5188:
5189: sub initnewstatus {
5190: my $docdir=$perlvar{'lonDocRoot'};
5191: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
5192: my $now=time;
5193: my $local=localtime($now);
5194: print $fh "LOND status $local - parent $$\n\n";
5195: opendir(DIR,"$docdir/lon-status/londchld");
5196: while (my $filename=readdir(DIR)) {
5197: unlink("$docdir/lon-status/londchld/$filename");
5198: }
5199: closedir(DIR);
5200: }
5201:
5202: # -------------------------------------------------------------- Status setting
5203:
5204: sub status {
5205: my $what=shift;
5206: my $now=time;
5207: my $local=localtime($now);
5208: $status=$local.': '.$what;
5209: $0='lond: '.$what.' '.$local;
5210: }
5211:
5212: # -------------------------------------------------------------- Talk to lonsql
5213:
5214: sub sql_reply {
5215: my ($cmd)=@_;
5216: my $answer=&sub_sql_reply($cmd);
5217: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
5218: return $answer;
5219: }
5220:
5221: sub sub_sql_reply {
5222: my ($cmd)=@_;
5223: my $unixsock="mysqlsock";
5224: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5225: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5226: Type => SOCK_STREAM,
5227: Timeout => 10)
5228: or return "con_lost";
5229: print $sclient "$cmd:$currentdomainid\n";
5230: my $answer=<$sclient>;
5231: chomp($answer);
5232: if (!$answer) { $answer="con_lost"; }
5233: return $answer;
5234: }
5235:
5236: # --------------------------------------- Is this the home server of an author?
5237:
5238: sub ishome {
5239: my $author=shift;
5240: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5241: my ($udom,$uname)=split(/\//,$author);
5242: my $proname=propath($udom,$uname);
5243: if (-e $proname) {
5244: return 'owner';
5245: } else {
5246: return 'not_owner';
5247: }
5248: }
5249:
5250: # ======================================================= Continue main program
5251: # ---------------------------------------------------- Fork once and dissociate
5252:
5253: my $fpid=fork;
5254: exit if $fpid;
5255: die "Couldn't fork: $!" unless defined ($fpid);
5256:
5257: POSIX::setsid() or die "Can't start new session: $!";
5258:
5259: # ------------------------------------------------------- Write our PID on disk
5260:
5261: my $execdir=$perlvar{'lonDaemons'};
5262: open (PIDSAVE,">$execdir/logs/lond.pid");
5263: print PIDSAVE "$$\n";
5264: close(PIDSAVE);
5265: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
5266: &status('Starting');
5267:
5268:
5269:
5270: # ----------------------------------------------------- Install signal handlers
5271:
5272:
5273: $SIG{CHLD} = \&REAPER;
5274: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5275: $SIG{HUP} = \&HUPSMAN;
5276: $SIG{USR1} = \&checkchildren;
5277: $SIG{USR2} = \&UpdateHosts;
5278:
5279: # Read the host hashes:
5280: &Apache::lonnet::load_hosts_tab();
5281:
5282: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5283:
5284: # --------------------------------------------------------------
5285: # Accept connections. When a connection comes in, it is validated
5286: # and if good, a child process is created to process transactions
5287: # along the connection.
5288:
5289: while (1) {
5290: &status('Starting accept');
5291: $client = $server->accept() or next;
5292: &status('Accepted '.$client.' off to spawn');
5293: make_new_child($client);
5294: &status('Finished spawning');
5295: }
5296:
5297: sub make_new_child {
5298: my $pid;
5299: # my $cipher; # Now global
5300: my $sigset;
5301:
5302: $client = shift;
5303: &status('Starting new child '.$client);
5304: &logthis('<font color="green"> Attempting to start child ('.$client.
5305: ")</font>");
5306: # block signal for fork
5307: $sigset = POSIX::SigSet->new(SIGINT);
5308: sigprocmask(SIG_BLOCK, $sigset)
5309: or die "Can't block SIGINT for fork: $!\n";
5310:
5311: die "fork: $!" unless defined ($pid = fork);
5312:
5313: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5314: # connection liveness.
5315:
5316: #
5317: # Figure out who we're talking to so we can record the peer in
5318: # the pid hash.
5319: #
5320: my $caller = getpeername($client);
5321: my ($port,$iaddr);
5322: if (defined($caller) && length($caller) > 0) {
5323: ($port,$iaddr)=unpack_sockaddr_in($caller);
5324: } else {
5325: &logthis("Unable to determine who caller was, getpeername returned nothing");
5326: }
5327: if (defined($iaddr)) {
5328: $clientip = inet_ntoa($iaddr);
5329: Debug("Connected with $clientip");
5330: } else {
5331: &logthis("Unable to determine clientip");
5332: $clientip='Unavailable';
5333: }
5334:
5335: if ($pid) {
5336: # Parent records the child's birth and returns.
5337: sigprocmask(SIG_UNBLOCK, $sigset)
5338: or die "Can't unblock SIGINT for fork: $!\n";
5339: $children{$pid} = $clientip;
5340: &status('Started child '.$pid);
5341: return;
5342: } else {
5343: # Child can *not* return from this subroutine.
5344: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5345: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5346: #don't get intercepted
5347: $SIG{USR1}= \&logstatus;
5348: $SIG{ALRM}= \&timeout;
5349: $lastlog='Forked ';
5350: $status='Forked';
5351:
5352: # unblock signals
5353: sigprocmask(SIG_UNBLOCK, $sigset)
5354: or die "Can't unblock SIGINT for fork: $!\n";
5355:
5356: # my $tmpsnum=0; # Now global
5357: #---------------------------------------------------- kerberos 5 initialization
5358: &Authen::Krb5::init_context();
5359: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
5360: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
5361: &Authen::Krb5::init_ets();
5362: }
5363:
5364: &status('Accepted connection');
5365: # =============================================================================
5366: # do something with the connection
5367: # -----------------------------------------------------------------------------
5368: # see if we know client and 'check' for spoof IP by ineffective challenge
5369:
5370: my $outsideip=$clientip;
5371: if ($clientip eq '127.0.0.1') {
5372: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
5373: }
5374:
5375: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
5376: my $ismanager=($managers{$outsideip} ne undef);
5377: $clientname = "[unknonwn]";
5378: if($clientrec) { # Establish client type.
5379: $ConnectionType = "client";
5380: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
5381: if($ismanager) {
5382: $ConnectionType = "both";
5383: }
5384: } else {
5385: $ConnectionType = "manager";
5386: $clientname = $managers{$outsideip};
5387: }
5388: my $clientok;
5389:
5390: if ($clientrec || $ismanager) {
5391: &status("Waiting for init from $clientip $clientname");
5392: &logthis('<font color="yellow">INFO: Connection, '.
5393: $clientip.
5394: " ($clientname) connection type = $ConnectionType </font>" );
5395: &status("Connecting $clientip ($clientname))");
5396: my $remotereq=<$client>;
5397: chomp($remotereq);
5398: Debug("Got init: $remotereq");
5399:
5400: if ($remotereq =~ /^init/) {
5401: &sethost("sethost:$perlvar{'lonHostID'}");
5402: #
5403: # If the remote is attempting a local init... give that a try:
5404: #
5405: my ($i, $inittype) = split(/:/, $remotereq);
5406:
5407: # If the connection type is ssl, but I didn't get my
5408: # certificate files yet, then I'll drop back to
5409: # insecure (if allowed).
5410:
5411: if($inittype eq "ssl") {
5412: my ($ca, $cert) = lonssl::CertificateFile;
5413: my $kfile = lonssl::KeyFile;
5414: if((!$ca) ||
5415: (!$cert) ||
5416: (!$kfile)) {
5417: $inittype = ""; # This forces insecure attempt.
5418: &logthis("<font color=\"blue\"> Certificates not "
5419: ."installed -- trying insecure auth</font>");
5420: } else { # SSL certificates are in place so
5421: } # Leave the inittype alone.
5422: }
5423:
5424: if($inittype eq "local") {
5425: my $key = LocalConnection($client, $remotereq);
5426: if($key) {
5427: Debug("Got local key $key");
5428: $clientok = 1;
5429: my $cipherkey = pack("H32", $key);
5430: $cipher = new IDEA($cipherkey);
5431: print $client "ok:local\n";
5432: &logthis('<font color="green"'
5433: . "Successful local authentication </font>");
5434: $keymode = "local"
5435: } else {
5436: Debug("Failed to get local key");
5437: $clientok = 0;
5438: shutdown($client, 3);
5439: close $client;
5440: }
5441: } elsif ($inittype eq "ssl") {
5442: my $key = SSLConnection($client);
5443: if ($key) {
5444: $clientok = 1;
5445: my $cipherkey = pack("H32", $key);
5446: $cipher = new IDEA($cipherkey);
5447: &logthis('<font color="green">'
5448: ."Successfull ssl authentication with $clientname </font>");
5449: $keymode = "ssl";
5450:
5451: } else {
5452: $clientok = 0;
5453: close $client;
5454: }
5455:
5456: } else {
5457: my $ok = InsecureConnection($client);
5458: if($ok) {
5459: $clientok = 1;
5460: &logthis('<font color="green">'
5461: ."Successful insecure authentication with $clientname </font>");
5462: print $client "ok\n";
5463: $keymode = "insecure";
5464: } else {
5465: &logthis('<font color="yellow">'
5466: ."Attempted insecure connection disallowed </font>");
5467: close $client;
5468: $clientok = 0;
5469:
5470: }
5471: }
5472: } else {
5473: &logthis(
5474: "<font color='blue'>WARNING: "
5475: ."$clientip failed to initialize: >$remotereq< </font>");
5476: &status('No init '.$clientip);
5477: }
5478:
5479: } else {
5480: &logthis(
5481: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5482: &status('Hung up on '.$clientip);
5483: }
5484:
5485: if ($clientok) {
5486: # ---------------- New known client connecting, could mean machine online again
5487: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
5488: && $clientip ne '127.0.0.1') {
5489: &Apache::lonnet::reconlonc();
5490: }
5491: &logthis("<font color='green'>Established connection: $clientname</font>");
5492: &status('Will listen to '.$clientname);
5493: # ------------------------------------------------------------ Process requests
5494: my $keep_going = 1;
5495: my $user_input;
5496: while(($user_input = get_request) && $keep_going) {
5497: alarm(120);
5498: Debug("Main: Got $user_input\n");
5499: $keep_going = &process_request($user_input);
5500: alarm(0);
5501: &status('Listening to '.$clientname." ($keymode)");
5502: }
5503:
5504: # --------------------------------------------- client unknown or fishy, refuse
5505: } else {
5506: print $client "refused\n";
5507: $client->close();
5508: &logthis("<font color='blue'>WARNING: "
5509: ."Rejected client $clientip, closing connection</font>");
5510: }
5511: }
5512:
5513: # =============================================================================
5514:
5515: &logthis("<font color='red'>CRITICAL: "
5516: ."Disconnect from $clientip ($clientname)</font>");
5517:
5518:
5519: # this exit is VERY important, otherwise the child will become
5520: # a producer of more and more children, forking yourself into
5521: # process death.
5522: exit;
5523:
5524: }
5525: #
5526: # Determine if a user is an author for the indicated domain.
5527: #
5528: # Parameters:
5529: # domain - domain to check in .
5530: # user - Name of user to check.
5531: #
5532: # Return:
5533: # 1 - User is an author for domain.
5534: # 0 - User is not an author for domain.
5535: sub is_author {
5536: my ($domain, $user) = @_;
5537:
5538: &Debug("is_author: $user @ $domain");
5539:
5540: my $hashref = &tie_user_hash($domain, $user, "roles",
5541: &GDBM_READER());
5542:
5543: # Author role should show up as a key /domain/_au
5544:
5545: my $key = "/$domain/_au";
5546: my $value;
5547: if (defined($hashref)) {
5548: $value = $hashref->{$key};
5549: }
5550:
5551: if(defined($value)) {
5552: &Debug("$user @ $domain is an author");
5553: }
5554:
5555: return defined($value);
5556: }
5557: #
5558: # Checks to see if the input roleput request was to set
5559: # an author role. If so, invokes the lchtmldir script to set
5560: # up a correct public_html
5561: # Parameters:
5562: # request - The request sent to the rolesput subchunk.
5563: # We're looking for /domain/_au
5564: # domain - The domain in which the user is having roles doctored.
5565: # user - Name of the user for which the role is being put.
5566: # authtype - The authentication type associated with the user.
5567: #
5568: sub manage_permissions {
5569: my ($request, $domain, $user, $authtype) = @_;
5570:
5571: &Debug("manage_permissions: $request $domain $user $authtype");
5572:
5573: # See if the request is of the form /$domain/_au
5574: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
5575: my $execdir = $perlvar{'lonDaemons'};
5576: my $userhome= "/home/$user" ;
5577: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
5578: &Debug("Setting homedir permissions for $userhome");
5579: system("$execdir/lchtmldir $userhome $user $authtype");
5580: }
5581: }
5582:
5583:
5584: #
5585: # Return the full path of a user password file, whether it exists or not.
5586: # Parameters:
5587: # domain - Domain in which the password file lives.
5588: # user - name of the user.
5589: # Returns:
5590: # Full passwd path:
5591: #
5592: sub password_path {
5593: my ($domain, $user) = @_;
5594: return &propath($domain, $user).'/passwd';
5595: }
5596:
5597: # Password Filename
5598: # Returns the path to a passwd file given domain and user... only if
5599: # it exists.
5600: # Parameters:
5601: # domain - Domain in which to search.
5602: # user - username.
5603: # Returns:
5604: # - If the password file exists returns its path.
5605: # - If the password file does not exist, returns undefined.
5606: #
5607: sub password_filename {
5608: my ($domain, $user) = @_;
5609:
5610: Debug ("PasswordFilename called: dom = $domain user = $user");
5611:
5612: my $path = &password_path($domain, $user);
5613: Debug("PasswordFilename got path: $path");
5614: if(-e $path) {
5615: return $path;
5616: } else {
5617: return undef;
5618: }
5619: }
5620:
5621: #
5622: # Rewrite the contents of the user's passwd file.
5623: # Parameters:
5624: # domain - domain of the user.
5625: # name - User's name.
5626: # contents - New contents of the file.
5627: # Returns:
5628: # 0 - Failed.
5629: # 1 - Success.
5630: #
5631: sub rewrite_password_file {
5632: my ($domain, $user, $contents) = @_;
5633:
5634: my $file = &password_filename($domain, $user);
5635: if (defined $file) {
5636: my $pf = IO::File->new(">$file");
5637: if($pf) {
5638: print $pf "$contents\n";
5639: return 1;
5640: } else {
5641: return 0;
5642: }
5643: } else {
5644: return 0;
5645: }
5646:
5647: }
5648:
5649: #
5650: # get_auth_type - Determines the authorization type of a user in a domain.
5651:
5652: # Returns the authorization type or nouser if there is no such user.
5653: #
5654: sub get_auth_type
5655: {
5656:
5657: my ($domain, $user) = @_;
5658:
5659: Debug("get_auth_type( $domain, $user ) \n");
5660: my $proname = &propath($domain, $user);
5661: my $passwdfile = "$proname/passwd";
5662: if( -e $passwdfile ) {
5663: my $pf = IO::File->new($passwdfile);
5664: my $realpassword = <$pf>;
5665: chomp($realpassword);
5666: Debug("Password info = $realpassword\n");
5667: my ($authtype, $contentpwd) = split(/:/, $realpassword);
5668: Debug("Authtype = $authtype, content = $contentpwd\n");
5669: return "$authtype:$contentpwd";
5670: } else {
5671: Debug("Returning nouser");
5672: return "nouser";
5673: }
5674: }
5675:
5676: #
5677: # Validate a user given their domain, name and password. This utility
5678: # function is used by both AuthenticateHandler and ChangePasswordHandler
5679: # to validate the login credentials of a user.
5680: # Parameters:
5681: # $domain - The domain being logged into (this is required due to
5682: # the capability for multihomed systems.
5683: # $user - The name of the user being validated.
5684: # $password - The user's propoposed password.
5685: #
5686: # Returns:
5687: # 1 - The domain,user,pasword triplet corresponds to a valid
5688: # user.
5689: # 0 - The domain,user,password triplet is not a valid user.
5690: #
5691: sub validate_user {
5692: my ($domain, $user, $password) = @_;
5693:
5694:
5695: # Why negative ~pi you may well ask? Well this function is about
5696: # authentication, and therefore very important to get right.
5697: # I've initialized the flag that determines whether or not I've
5698: # validated correctly to a value it's not supposed to get.
5699: # At the end of this function. I'll ensure that it's not still that
5700: # value so we don't just wind up returning some accidental value
5701: # as a result of executing an unforseen code path that
5702: # did not set $validated. At the end of valid execution paths,
5703: # validated shoule be 1 for success or 0 for failuer.
5704:
5705: my $validated = -3.14159;
5706:
5707: # How we authenticate is determined by the type of authentication
5708: # the user has been assigned. If the authentication type is
5709: # "nouser", the user does not exist so we will return 0.
5710:
5711: my $contents = &get_auth_type($domain, $user);
5712: my ($howpwd, $contentpwd) = split(/:/, $contents);
5713:
5714: my $null = pack("C",0); # Used by kerberos auth types.
5715:
5716: if ($howpwd ne 'nouser') {
5717:
5718: if($howpwd eq "internal") { # Encrypted is in local password file.
5719: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5720: }
5721: elsif ($howpwd eq "unix") { # User is a normal unix user.
5722: $contentpwd = (getpwnam($user))[1];
5723: if($contentpwd) {
5724: if($contentpwd eq 'x') { # Shadow password file...
5725: my $pwauth_path = "/usr/local/sbin/pwauth";
5726: open PWAUTH, "|$pwauth_path" or
5727: die "Cannot invoke authentication";
5728: print PWAUTH "$user\n$password\n";
5729: close PWAUTH;
5730: $validated = ! $?;
5731:
5732: } else { # Passwords in /etc/passwd.
5733: $validated = (crypt($password,
5734: $contentpwd) eq $contentpwd);
5735: }
5736: } else {
5737: $validated = 0;
5738: }
5739: }
5740: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5741: if(! ($password =~ /$null/) ) {
5742: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5743: "",
5744: $contentpwd,,
5745: 'krbtgt',
5746: $contentpwd,
5747: 1,
5748: $password);
5749: if(!$k4error) {
5750: $validated = 1;
5751: } else {
5752: $validated = 0;
5753: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5754: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5755: }
5756: } else {
5757: $validated = 0; # Password has a match with null.
5758: }
5759: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
5760: if(!($password =~ /$null/)) { # Null password not allowed.
5761: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5762: .$contentpwd);
5763: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5764: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5765: my $credentials= &Authen::Krb5::cc_default();
5766: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
5767: .$contentpwd));
5768: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
5769: $krbserver,
5770: $password,
5771: $credentials);
5772: $validated = ($krbreturn == 1);
5773: } else {
5774: $validated = 0;
5775: }
5776: } elsif ($howpwd eq "localauth") {
5777: # Authenticate via installation specific authentcation method:
5778: $validated = &localauth::localauth($user,
5779: $password,
5780: $contentpwd,
5781: $domain);
5782: if ($validated < 0) {
5783: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
5784: $validated = 0;
5785: }
5786: } else { # Unrecognized auth is also bad.
5787: $validated = 0;
5788: }
5789: } else {
5790: $validated = 0;
5791: }
5792: #
5793: # $validated has the correct stat of the authentication:
5794: #
5795:
5796: unless ($validated != -3.14159) {
5797: # I >really really< want to know if this happens.
5798: # since it indicates that user authentication is badly
5799: # broken in some code path.
5800: #
5801: die "ValidateUser - failed to set the value of validated $domain, $user $password";
5802: }
5803: return $validated;
5804: }
5805:
5806:
5807: sub addline {
5808: my ($fname,$hostid,$ip,$newline)=@_;
5809: my $contents;
5810: my $found=0;
5811: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
5812: my $sh;
5813: if ($sh=IO::File->new("$fname.subscription")) {
5814: while (my $subline=<$sh>) {
5815: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5816: }
5817: $sh->close();
5818: }
5819: $sh=IO::File->new(">$fname.subscription");
5820: if ($contents) { print $sh $contents; }
5821: if ($newline) { print $sh $newline; }
5822: $sh->close();
5823: return $found;
5824: }
5825:
5826: sub get_chat {
5827: my ($cdom,$cname,$udom,$uname,$group)=@_;
5828:
5829: my @entries=();
5830: my $namespace = 'nohist_chatroom';
5831: my $namespace_inroom = 'nohist_inchatroom';
5832: if ($group ne '') {
5833: $namespace .= '_'.$group;
5834: $namespace_inroom .= '_'.$group;
5835: }
5836: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
5837: &GDBM_READER());
5838: if ($hashref) {
5839: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
5840: &untie_user_hash($hashref);
5841: }
5842: my @participants=();
5843: my $cutoff=time-60;
5844: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
5845: &GDBM_WRCREAT());
5846: if ($hashref) {
5847: $hashref->{$uname.':'.$udom}=time;
5848: foreach my $user (sort(keys(%$hashref))) {
5849: if ($hashref->{$user}>$cutoff) {
5850: push(@participants, 'active_participant:'.$user);
5851: }
5852: }
5853: &untie_user_hash($hashref);
5854: }
5855: return (@participants,@entries);
5856: }
5857:
5858: sub chat_add {
5859: my ($cdom,$cname,$newchat,$group)=@_;
5860: my @entries=();
5861: my $time=time;
5862: my $namespace = 'nohist_chatroom';
5863: my $logfile = 'chatroom.log';
5864: if ($group ne '') {
5865: $namespace .= '_'.$group;
5866: $logfile = 'chatroom_'.$group.'.log';
5867: }
5868: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
5869: &GDBM_WRCREAT());
5870: if ($hashref) {
5871: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
5872: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5873: my ($thentime,$idnum)=split(/\_/,$lastid);
5874: my $newid=$time.'_000000';
5875: if ($thentime==$time) {
5876: $idnum=~s/^0+//;
5877: $idnum++;
5878: $idnum=substr('000000'.$idnum,-6,6);
5879: $newid=$time.'_'.$idnum;
5880: }
5881: $hashref->{$newid}=$newchat;
5882: my $expired=$time-3600;
5883: foreach my $comment (keys(%$hashref)) {
5884: my ($thistime) = ($comment=~/(\d+)\_/);
5885: if ($thistime<$expired) {
5886: delete $hashref->{$comment};
5887: }
5888: }
5889: {
5890: my $proname=&propath($cdom,$cname);
5891: if (open(CHATLOG,">>$proname/$logfile")) {
5892: print CHATLOG ("$time:".&unescape($newchat)."\n");
5893: }
5894: close(CHATLOG);
5895: }
5896: &untie_user_hash($hashref);
5897: }
5898: }
5899:
5900: sub unsub {
5901: my ($fname,$clientip)=@_;
5902: my $result;
5903: my $unsubs = 0; # Number of successful unsubscribes:
5904:
5905:
5906: # An old way subscriptions were handled was to have a
5907: # subscription marker file:
5908:
5909: Debug("Attempting unlink of $fname.$clientname");
5910: if (unlink("$fname.$clientname")) {
5911: $unsubs++; # Successful unsub via marker file.
5912: }
5913:
5914: # The more modern way to do it is to have a subscription list
5915: # file:
5916:
5917: if (-e "$fname.subscription") {
5918: my $found=&addline($fname,$clientname,$clientip,'');
5919: if ($found) {
5920: $unsubs++;
5921: }
5922: }
5923:
5924: # If either or both of these mechanisms succeeded in unsubscribing a
5925: # resource we can return ok:
5926:
5927: if($unsubs) {
5928: $result = "ok\n";
5929: } else {
5930: $result = "not_subscribed\n";
5931: }
5932:
5933: return $result;
5934: }
5935:
5936: sub currentversion {
5937: my $fname=shift;
5938: my $version=-1;
5939: my $ulsdir='';
5940: if ($fname=~/^(.+)\/[^\/]+$/) {
5941: $ulsdir=$1;
5942: }
5943: my ($fnamere1,$fnamere2);
5944: # remove version if already specified
5945: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
5946: # get the bits that go before and after the version number
5947: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5948: $fnamere1=$1;
5949: $fnamere2='.'.$2;
5950: }
5951: if (-e $fname) { $version=1; }
5952: if (-e $ulsdir) {
5953: if(-d $ulsdir) {
5954: if (opendir(LSDIR,$ulsdir)) {
5955: my $ulsfn;
5956: while ($ulsfn=readdir(LSDIR)) {
5957: # see if this is a regular file (ignore links produced earlier)
5958: my $thisfile=$ulsdir.'/'.$ulsfn;
5959: unless (-l $thisfile) {
5960: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
5961: if ($1>$version) { $version=$1; }
5962: }
5963: }
5964: }
5965: closedir(LSDIR);
5966: $version++;
5967: }
5968: }
5969: }
5970: return $version;
5971: }
5972:
5973: sub thisversion {
5974: my $fname=shift;
5975: my $version=-1;
5976: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5977: $version=$1;
5978: }
5979: return $version;
5980: }
5981:
5982: sub subscribe {
5983: my ($userinput,$clientip)=@_;
5984: my $result;
5985: my ($cmd,$fname)=split(/:/,$userinput,2);
5986: my $ownership=&ishome($fname);
5987: if ($ownership eq 'owner') {
5988: # explitly asking for the current version?
5989: unless (-e $fname) {
5990: my $currentversion=¤tversion($fname);
5991: if (&thisversion($fname)==$currentversion) {
5992: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5993: my $root=$1;
5994: my $extension=$2;
5995: symlink($root.'.'.$extension,
5996: $root.'.'.$currentversion.'.'.$extension);
5997: unless ($extension=~/\.meta$/) {
5998: symlink($root.'.'.$extension.'.meta',
5999: $root.'.'.$currentversion.'.'.$extension.'.meta');
6000: }
6001: }
6002: }
6003: }
6004: if (-e $fname) {
6005: if (-d $fname) {
6006: $result="directory\n";
6007: } else {
6008: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
6009: my $now=time;
6010: my $found=&addline($fname,$clientname,$clientip,
6011: "$clientname:$clientip:$now\n");
6012: if ($found) { $result="$fname\n"; }
6013: # if they were subscribed to only meta data, delete that
6014: # subscription, when you subscribe to a file you also get
6015: # the metadata
6016: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
6017: $fname=~s/\/home\/httpd\/html\/res/raw/;
6018: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
6019: $result="$fname\n";
6020: }
6021: } else {
6022: $result="not_found\n";
6023: }
6024: } else {
6025: $result="rejected\n";
6026: }
6027: return $result;
6028: }
6029: # Change the passwd of a unix user. The caller must have
6030: # first verified that the user is a loncapa user.
6031: #
6032: # Parameters:
6033: # user - Unix user name to change.
6034: # pass - New password for the user.
6035: # Returns:
6036: # ok - if success
6037: # other - Some meaningfule error message string.
6038: # NOTE:
6039: # invokes a setuid script to change the passwd.
6040: sub change_unix_password {
6041: my ($user, $pass) = @_;
6042:
6043: &Debug("change_unix_password");
6044: my $execdir=$perlvar{'lonDaemons'};
6045: &Debug("Opening lcpasswd pipeline");
6046: my $pf = IO::File->new("|$execdir/lcpasswd > "
6047: ."$perlvar{'lonDaemons'}"
6048: ."/logs/lcpasswd.log");
6049: print $pf "$user\n$pass\n$pass\n";
6050: close $pf;
6051: my $err = $?;
6052: return ($err < @passwderrors) ? $passwderrors[$err] :
6053: "pwchange_falure - unknown error";
6054:
6055:
6056: }
6057:
6058:
6059: sub make_passwd_file {
6060: my ($uname, $umode,$npass,$passfilename)=@_;
6061: my $result="ok\n";
6062: if ($umode eq 'krb4' or $umode eq 'krb5') {
6063: {
6064: my $pf = IO::File->new(">$passfilename");
6065: if ($pf) {
6066: print $pf "$umode:$npass\n";
6067: } else {
6068: $result = "pass_file_failed_error";
6069: }
6070: }
6071: } elsif ($umode eq 'internal') {
6072: my $salt=time;
6073: $salt=substr($salt,6,2);
6074: my $ncpass=crypt($npass,$salt);
6075: {
6076: &Debug("Creating internal auth");
6077: my $pf = IO::File->new(">$passfilename");
6078: if($pf) {
6079: print $pf "internal:$ncpass\n";
6080: } else {
6081: $result = "pass_file_failed_error";
6082: }
6083: }
6084: } elsif ($umode eq 'localauth') {
6085: {
6086: my $pf = IO::File->new(">$passfilename");
6087: if($pf) {
6088: print $pf "localauth:$npass\n";
6089: } else {
6090: $result = "pass_file_failed_error";
6091: }
6092: }
6093: } elsif ($umode eq 'unix') {
6094: {
6095: #
6096: # Don't allow the creation of privileged accounts!!! that would
6097: # be real bad!!!
6098: #
6099: my $uid = getpwnam($uname);
6100: if((defined $uid) && ($uid == 0)) {
6101: &logthis(">>>Attempted to create privilged account blocked");
6102: return "no_priv_account_error\n";
6103: }
6104:
6105: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
6106:
6107: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
6108: {
6109: &Debug("Executing external: ".$execpath);
6110: &Debug("user = ".$uname.", Password =". $npass);
6111: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
6112: print $se "$uname\n";
6113: print $se "$npass\n";
6114: print $se "$npass\n";
6115: print $se "$lc_error_file\n"; # Status -> unique file.
6116: }
6117: if (-r $lc_error_file) {
6118: &Debug("Opening error file: $lc_error_file");
6119: my $error = IO::File->new("< $lc_error_file");
6120: my $useraddok = <$error>;
6121: $error->close;
6122: unlink($lc_error_file);
6123:
6124: chomp $useraddok;
6125:
6126: if($useraddok > 0) {
6127: my $error_text = &lcuseraddstrerror($useraddok);
6128: &logthis("Failed lcuseradd: $error_text");
6129: $result = "lcuseradd_failed:$error_text\n";
6130: } else {
6131: my $pf = IO::File->new(">$passfilename");
6132: if($pf) {
6133: print $pf "unix:\n";
6134: } else {
6135: $result = "pass_file_failed_error";
6136: }
6137: }
6138: } else {
6139: &Debug("Could not locate lcuseradd error: $lc_error_file");
6140: $result="bug_lcuseradd_no_output_file";
6141: }
6142: }
6143: } elsif ($umode eq 'none') {
6144: {
6145: my $pf = IO::File->new("> $passfilename");
6146: if($pf) {
6147: print $pf "none:\n";
6148: } else {
6149: $result = "pass_file_failed_error";
6150: }
6151: }
6152: } else {
6153: $result="auth_mode_error\n";
6154: }
6155: return $result;
6156: }
6157:
6158: sub convert_photo {
6159: my ($start,$dest)=@_;
6160: system("convert $start $dest");
6161: }
6162:
6163: sub sethost {
6164: my ($remotereq) = @_;
6165: my (undef,$hostid)=split(/:/,$remotereq);
6166: # ignore sethost if we are already correct
6167: if ($hostid eq $currenthostid) {
6168: return 'ok';
6169: }
6170:
6171: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
6172: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
6173: eq &Apache::lonnet::get_host_ip($hostid)) {
6174: $currenthostid =$hostid;
6175: $currentdomainid=&Apache::lonnet::host_domain($hostid);
6176: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
6177: } else {
6178: &logthis("Requested host id $hostid not an alias of ".
6179: $perlvar{'lonHostID'}." refusing connection");
6180: return 'unable_to_set';
6181: }
6182: return 'ok';
6183: }
6184:
6185: sub version {
6186: my ($userinput)=@_;
6187: $remoteVERSION=(split(/:/,$userinput))[1];
6188: return "version:$VERSION";
6189: }
6190:
6191:
6192: # ----------------------------------- POD (plain old documentation, CPAN style)
6193:
6194: =head1 NAME
6195:
6196: lond - "LON Daemon" Server (port "LOND" 5663)
6197:
6198: =head1 SYNOPSIS
6199:
6200: Usage: B<lond>
6201:
6202: Should only be run as user=www. This is a command-line script which
6203: is invoked by B<loncron>. There is no expectation that a typical user
6204: will manually start B<lond> from the command-line. (In other words,
6205: DO NOT START B<lond> YOURSELF.)
6206:
6207: =head1 DESCRIPTION
6208:
6209: There are two characteristics associated with the running of B<lond>,
6210: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6211: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6212: subscriptions, etc). These are described in two large
6213: sections below.
6214:
6215: B<PROCESS MANAGEMENT>
6216:
6217: Preforker - server who forks first. Runs as a daemon. HUPs.
6218: Uses IDEA encryption
6219:
6220: B<lond> forks off children processes that correspond to the other servers
6221: in the network. Management of these processes can be done at the
6222: parent process level or the child process level.
6223:
6224: B<logs/lond.log> is the location of log messages.
6225:
6226: The process management is now explained in terms of linux shell commands,
6227: subroutines internal to this code, and signal assignments:
6228:
6229: =over 4
6230:
6231: =item *
6232:
6233: PID is stored in B<logs/lond.pid>
6234:
6235: This is the process id number of the parent B<lond> process.
6236:
6237: =item *
6238:
6239: SIGTERM and SIGINT
6240:
6241: Parent signal assignment:
6242: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6243:
6244: Child signal assignment:
6245: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6246: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6247: to restart a new child.)
6248:
6249: Command-line invocations:
6250: B<kill> B<-s> SIGTERM I<PID>
6251: B<kill> B<-s> SIGINT I<PID>
6252:
6253: Subroutine B<HUNTSMAN>:
6254: This is only invoked for the B<lond> parent I<PID>.
6255: This kills all the children, and then the parent.
6256: The B<lonc.pid> file is cleared.
6257:
6258: =item *
6259:
6260: SIGHUP
6261:
6262: Current bug:
6263: This signal can only be processed the first time
6264: on the parent process. Subsequent SIGHUP signals
6265: have no effect.
6266:
6267: Parent signal assignment:
6268: $SIG{HUP} = \&HUPSMAN;
6269:
6270: Child signal assignment:
6271: none (nothing happens)
6272:
6273: Command-line invocations:
6274: B<kill> B<-s> SIGHUP I<PID>
6275:
6276: Subroutine B<HUPSMAN>:
6277: This is only invoked for the B<lond> parent I<PID>,
6278: This kills all the children, and then the parent.
6279: The B<lond.pid> file is cleared.
6280:
6281: =item *
6282:
6283: SIGUSR1
6284:
6285: Parent signal assignment:
6286: $SIG{USR1} = \&USRMAN;
6287:
6288: Child signal assignment:
6289: $SIG{USR1}= \&logstatus;
6290:
6291: Command-line invocations:
6292: B<kill> B<-s> SIGUSR1 I<PID>
6293:
6294: Subroutine B<USRMAN>:
6295: When invoked for the B<lond> parent I<PID>,
6296: SIGUSR1 is sent to all the children, and the status of
6297: each connection is logged.
6298:
6299: =item *
6300:
6301: SIGUSR2
6302:
6303: Parent Signal assignment:
6304: $SIG{USR2} = \&UpdateHosts
6305:
6306: Child signal assignment:
6307: NONE
6308:
6309:
6310: =item *
6311:
6312: SIGCHLD
6313:
6314: Parent signal assignment:
6315: $SIG{CHLD} = \&REAPER;
6316:
6317: Child signal assignment:
6318: none
6319:
6320: Command-line invocations:
6321: B<kill> B<-s> SIGCHLD I<PID>
6322:
6323: Subroutine B<REAPER>:
6324: This is only invoked for the B<lond> parent I<PID>.
6325: Information pertaining to the child is removed.
6326: The socket port is cleaned up.
6327:
6328: =back
6329:
6330: B<SERVER-SIDE ACTIVITIES>
6331:
6332: Server-side information can be accepted in an encrypted or non-encrypted
6333: method.
6334:
6335: =over 4
6336:
6337: =item ping
6338:
6339: Query a client in the hosts.tab table; "Are you there?"
6340:
6341: =item pong
6342:
6343: Respond to a ping query.
6344:
6345: =item ekey
6346:
6347: Read in encrypted key, make cipher. Respond with a buildkey.
6348:
6349: =item load
6350:
6351: Respond with CPU load based on a computation upon /proc/loadavg.
6352:
6353: =item currentauth
6354:
6355: Reply with current authentication information (only over an
6356: encrypted channel).
6357:
6358: =item auth
6359:
6360: Only over an encrypted channel, reply as to whether a user's
6361: authentication information can be validated.
6362:
6363: =item passwd
6364:
6365: Allow for a password to be set.
6366:
6367: =item makeuser
6368:
6369: Make a user.
6370:
6371: =item passwd
6372:
6373: Allow for authentication mechanism and password to be changed.
6374:
6375: =item home
6376:
6377: Respond to a question "are you the home for a given user?"
6378:
6379: =item update
6380:
6381: Update contents of a subscribed resource.
6382:
6383: =item unsubscribe
6384:
6385: The server is unsubscribing from a resource.
6386:
6387: =item subscribe
6388:
6389: The server is subscribing to a resource.
6390:
6391: =item log
6392:
6393: Place in B<logs/lond.log>
6394:
6395: =item put
6396:
6397: stores hash in namespace
6398:
6399: =item rolesputy
6400:
6401: put a role into a user's environment
6402:
6403: =item get
6404:
6405: returns hash with keys from array
6406: reference filled in from namespace
6407:
6408: =item eget
6409:
6410: returns hash with keys from array
6411: reference filled in from namesp (encrypts the return communication)
6412:
6413: =item rolesget
6414:
6415: get a role from a user's environment
6416:
6417: =item del
6418:
6419: deletes keys out of array from namespace
6420:
6421: =item keys
6422:
6423: returns namespace keys
6424:
6425: =item dump
6426:
6427: dumps the complete (or key matching regexp) namespace into a hash
6428:
6429: =item store
6430:
6431: stores hash permanently
6432: for this url; hashref needs to be given and should be a \%hashname; the
6433: remaining args aren't required and if they aren't passed or are '' they will
6434: be derived from the ENV
6435:
6436: =item restore
6437:
6438: returns a hash for a given url
6439:
6440: =item querysend
6441:
6442: Tells client about the lonsql process that has been launched in response
6443: to a sent query.
6444:
6445: =item queryreply
6446:
6447: Accept information from lonsql and make appropriate storage in temporary
6448: file space.
6449:
6450: =item idput
6451:
6452: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6453: for each student, defined perhaps by the institutional Registrar.)
6454:
6455: =item idget
6456:
6457: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6458: for each student, defined perhaps by the institutional Registrar.)
6459:
6460: =item tmpput
6461:
6462: Accept and store information in temporary space.
6463:
6464: =item tmpget
6465:
6466: Send along temporarily stored information.
6467:
6468: =item ls
6469:
6470: List part of a user's directory.
6471:
6472: =item pushtable
6473:
6474: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6475: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6476: must be restored manually in case of a problem with the new table file.
6477: pushtable requires that the request be encrypted and validated via
6478: ValidateManager. The form of the command is:
6479: enc:pushtable tablename <tablecontents> \n
6480: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6481: cleartext newline.
6482:
6483: =item Hanging up (exit or init)
6484:
6485: What to do when a client tells the server that they (the client)
6486: are leaving the network.
6487:
6488: =item unknown command
6489:
6490: If B<lond> is sent an unknown command (not in the list above),
6491: it replys to the client "unknown_cmd".
6492:
6493:
6494: =item UNKNOWN CLIENT
6495:
6496: If the anti-spoofing algorithm cannot verify the client,
6497: the client is rejected (with a "refused" message sent
6498: to the client, and the connection is closed.
6499:
6500: =back
6501:
6502: =head1 PREREQUISITES
6503:
6504: IO::Socket
6505: IO::File
6506: Apache::File
6507: POSIX
6508: Crypt::IDEA
6509: LWP::UserAgent()
6510: GDBM_File
6511: Authen::Krb4
6512: Authen::Krb5
6513:
6514: =head1 COREQUISITES
6515:
6516: =head1 OSNAMES
6517:
6518: linux
6519:
6520: =head1 SCRIPT CATEGORIES
6521:
6522: Server/Process
6523:
6524: =cut
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