1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.559 2019/07/02 19:40:18 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA;
35: use LONCAPA::Configuration;
36: use LONCAPA::Lond;
37:
38: use Socket;
39: use IO::Socket;
40: use IO::File;
41: #use Apache::File;
42: use POSIX;
43: use Crypt::IDEA;
44: use HTTP::Request;
45: use Digest::MD5 qw(md5_hex);
46: use GDBM_File;
47: use Authen::Krb5;
48: use localauth;
49: use localenroll;
50: use localstudentphoto;
51: use File::Copy;
52: use File::Find;
53: use LONCAPA::lonlocal;
54: use LONCAPA::lonssl;
55: use Fcntl qw(:flock);
56: use Apache::lonnet;
57: use Mail::Send;
58: use Crypt::Eksblowfish::Bcrypt;
59: use Digest::SHA;
60: use Encode;
61: use LONCAPA::LWPReq;
62:
63: my $DEBUG = 0; # Non zero to enable debug log entries.
64:
65: my $status='';
66: my $lastlog='';
67:
68: my $VERSION='$Revision: 1.559 $'; #' stupid emacs
69: my $remoteVERSION;
70: my $currenthostid="default";
71: my $currentdomainid;
72:
73: my $client;
74: my $clientip; # IP address of client.
75: my $clientname; # LonCAPA name of client.
76: my $clientversion; # LonCAPA version running on client.
77: my $clienthomedom; # LonCAPA domain of homeID for client.
78: my $clientintdom; # LonCAPA "internet domain" for client.
79: my $clientsamedom; # LonCAPA domain same for this host
80: # and client.
81: my $clientsameinst; # LonCAPA "internet domain" same for
82: # this host and client.
83: my $clientremoteok; # Current domain permits hosting on client
84: # (not set if host and client share "internet domain").
85: # Values are 0 or 1; 1 if allowed.
86: my %clientprohibited; # Commands from client prohibited for domain's
87: # users.
88:
89: my $server;
90:
91: my $keymode;
92:
93: my $cipher; # Cipher key negotiated with client
94: my $tmpsnum = 0; # Id of tmpputs.
95:
96: #
97: # Connection type is:
98: # client - All client actions are allowed
99: # manager - only management functions allowed.
100: # both - Both management and client actions are allowed
101: #
102:
103: my $ConnectionType;
104:
105: my %managers; # Ip -> manager names
106:
107: my %perlvar; # Will have the apache conf defined perl vars.
108:
109: my %secureconf; # Will have requirements for security
110: # of lond connections
111:
112: my %crlchecked; # Will contain clients for which the client's SSL
113: # has been checked against the cluster's Certificate
114: # Revocation List.
115:
116: my $dist;
117:
118: #
119: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
120: # Each element of the hash contains a reference to an array that contains:
121: # A reference to a sub that executes the request corresponding to the keyword.
122: # A flag that is true if the request must be encoded to be acceptable.
123: # A mask with bits as follows:
124: # CLIENT_OK - Set when the function is allowed by ordinary clients
125: # MANAGER_OK - Set when the function is allowed to manager clients.
126: #
127: my $CLIENT_OK = 1;
128: my $MANAGER_OK = 2;
129: my %Dispatcher;
130:
131:
132: #
133: # The array below are password error strings."
134: #
135: my $lastpwderror = 13; # Largest error number from lcpasswd.
136: my @passwderrors = ("ok",
137: "pwchange_failure - lcpasswd must be run as user 'www'",
138: "pwchange_failure - lcpasswd got incorrect number of arguments",
139: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
140: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
141: "pwchange_failure - lcpasswd User does not exist.",
142: "pwchange_failure - lcpasswd Incorrect current passwd",
143: "pwchange_failure - lcpasswd Unable to su to root.",
144: "pwchange_failure - lcpasswd Cannot set new passwd.",
145: "pwchange_failure - lcpasswd Username has invalid characters",
146: "pwchange_failure - lcpasswd Invalid characters in password",
147: "pwchange_failure - lcpasswd User already exists",
148: "pwchange_failure - lcpasswd Something went wrong with user addition.",
149: "pwchange_failure - lcpasswd Password mismatch",
150: "pwchange_failure - lcpasswd Error filename is invalid");
151:
152:
153: # This array are the errors from lcinstallfile:
154:
155: my @installerrors = ("ok",
156: "Initial user id of client not that of www",
157: "Usage error, not enough command line arguments",
158: "Source filename does not exist",
159: "Destination filename does not exist",
160: "Some file operation failed",
161: "Invalid table filename."
162: );
163:
164: #
165: # The %trust hash classifies commands according to type of trust
166: # required for execution of the command.
167: #
168: # When clients from a different institution request execution of a
169: # particular command, the trust settings for that institution set
170: # for this domain (or default domain for a multi-domain server) will
171: # be checked to see if running the command is allowed.
172: #
173: # Trust types which depend on the "Trust" domain configuration
174: # for the machine's default domain are:
175: #
176: # content ("Access to this domain's content by others")
177: # shared ("Access to other domain's content by this domain")
178: # enroll ("Enrollment in this domain's courses by others")
179: # coaurem ("Co-author roles for this domain's users elsewhere")
180: # othcoau ("Co-author roles in this domain for others")
181: # domroles ("Domain roles in this domain assignable to others")
182: # catalog ("Course Catalog for this domain displayed elsewhere")
183: # reqcrs ("Requests for creation of courses in this domain by others")
184: # msg ("Users in other domains can send messages to this domain")
185: #
186: # Trust type which depends on the User Session Hosting (remote)
187: # domain configuration for machine's default domain is: "remote".
188: #
189: # Trust types which depend on contents of manager.tab in
190: # /home/httpd/lonTabs is: "manageronly".
191: #
192: # Trust type which requires client to share the same LON-CAPA
193: # "internet domain" (i.e., same institution as this server) is:
194: # "institutiononly".
195: #
196:
197: my %trust = (
198: auth => {remote => 1},
199: autocreatepassword => {remote => 1},
200: autocrsreqchecks => {remote => 1, reqcrs => 1},
201: autocrsrequpdate => {remote => 1},
202: autocrsreqvalidation => {remote => 1},
203: autogetsections => {remote => 1},
204: autoinstcodedefaults => {remote => 1, catalog => 1},
205: autoinstcodeformat => {remote => 1, catalog => 1},
206: autonewcourse => {remote => 1, reqcrs => 1},
207: autophotocheck => {remote => 1, enroll => 1},
208: autophotochoice => {remote => 1},
209: autophotopermission => {remote => 1, enroll => 1},
210: autopossibleinstcodes => {remote => 1, reqcrs => 1},
211: autoretrieve => {remote => 1, enroll => 1, catalog => 1},
212: autorun => {remote => 1, enroll => 1, reqcrs => 1},
213: autovalidateclass_sec => {catalog => 1},
214: autovalidatecourse => {remote => 1, enroll => 1},
215: autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1},
216: changeuserauth => {remote => 1, domroles => 1},
217: chatretr => {remote => 1, enroll => 1},
218: chatsend => {remote => 1, enroll => 1},
219: courseiddump => {remote => 1, domroles => 1, enroll => 1},
220: courseidput => {remote => 1, domroles => 1, enroll => 1},
221: courseidputhash => {remote => 1, domroles => 1, enroll => 1},
222: courselastaccess => {remote => 1, domroles => 1, enroll => 1},
223: currentauth => {remote => 1, domroles => 1, enroll => 1},
224: currentdump => {remote => 1, enroll => 1},
225: currentversion => {remote=> 1, content => 1},
226: dcmaildump => {remote => 1, domroles => 1},
227: dcmailput => {remote => 1, domroles => 1},
228: del => {remote => 1, domroles => 1, enroll => 1, content => 1},
229: delbalcookie => {institutiononly => 1},
230: deldom => {remote => 1, domroles => 1}, # not currently used
231: devalidatecache => {institutiononly => 1},
232: domroleput => {remote => 1, enroll => 1},
233: domrolesdump => {remote => 1, catalog => 1},
234: du => {remote => 1, enroll => 1},
235: du2 => {remote => 1, enroll => 1},
236: dump => {remote => 1, enroll => 1, domroles => 1},
237: edit => {institutiononly => 1}, #not used currently
238: eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
239: egetdom => {remote => 1, domroles => 1, enroll => 1, },
240: ekey => {anywhere => 1},
241: exit => {anywhere => 1},
242: fetchuserfile => {remote => 1, enroll => 1},
243: get => {remote => 1, domroles => 1, enroll => 1},
244: getdom => {anywhere => 1},
245: home => {anywhere => 1},
246: iddel => {remote => 1, enroll => 1},
247: idget => {remote => 1, enroll => 1},
248: idput => {remote => 1, domroles => 1, enroll => 1},
249: inc => {remote => 1, enroll => 1},
250: init => {anywhere => 1},
251: inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
252: instemailrules => {remote => 1, domroles => 1},
253: instidrulecheck => {remote => 1, domroles => 1,},
254: instidrules => {remote => 1, domroles => 1,},
255: instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
256: instselfcreatecheck => {institutiononly => 1},
257: instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
258: keys => {remote => 1,},
259: load => {anywhere => 1},
260: log => {anywhere => 1},
261: ls => {remote => 1, enroll => 1, content => 1,},
262: ls2 => {remote => 1, enroll => 1, content => 1,},
263: ls3 => {remote => 1, enroll => 1, content => 1,},
264: makeuser => {remote => 1, enroll => 1, domroles => 1,},
265: mkdiruserfile => {remote => 1, enroll => 1,},
266: newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
267: passwd => {remote => 1},
268: ping => {anywhere => 1},
269: pong => {anywhere => 1},
270: pushfile => {manageronly => 1},
271: put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
272: putdom => {remote => 1, domroles => 1,},
273: putstore => {remote => 1, enroll => 1},
274: queryreply => {anywhere => 1},
275: querysend => {anywhere => 1},
276: querysend_activitylog => {remote => 1},
277: querysend_allusers => {remote => 1, domroles => 1},
278: querysend_courselog => {remote => 1},
279: querysend_fetchenrollment => {remote => 1},
280: querysend_getinstuser => {remote => 1},
281: querysend_getmultinstusers => {remote => 1},
282: querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1},
283: querysend_institutionalphotos => {remote => 1},
284: querysend_portfolio_metadata => {remote => 1, content => 1},
285: querysend_userlog => {remote => 1, domroles => 1},
286: querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1},
287: quit => {anywhere => 1},
288: readlonnetglobal => {institutiononly => 1},
289: reinit => {manageronly => 1}, #not used currently
290: removeuserfile => {remote => 1, enroll => 1},
291: renameuserfile => {remote => 1,},
292: restore => {remote => 1, enroll => 1, reqcrs => 1,},
293: rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
294: rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
295: servercerts => {institutiononly => 1},
296: serverdistarch => {anywhere => 1},
297: serverhomeID => {anywhere => 1},
298: serverloncaparev => {anywhere => 1},
299: servertimezone => {remote => 1, enroll => 1},
300: setannounce => {remote => 1, domroles => 1},
301: sethost => {anywhere => 1},
302: store => {remote => 1, enroll => 1, reqcrs => 1,},
303: studentphoto => {remote => 1, enroll => 1},
304: sub => {content => 1,},
305: tmpdel => {institutiononly => 1},
306: tmpget => {institutiononly => 1},
307: tmpput => {remote => 1, othcoau => 1},
308: tokenauthuserfile => {anywhere => 1},
309: unsub => {content => 1,},
310: update => {shared => 1},
311: updateclickers => {remote => 1},
312: userhassession => {anywhere => 1},
313: userload => {anywhere => 1},
314: version => {anywhere => 1}, #not used
315: );
316:
317: #
318: # Statistics that are maintained and dislayed in the status line.
319: #
320: my $Transactions = 0; # Number of attempted transactions.
321: my $Failures = 0; # Number of transcations failed.
322:
323: # ResetStatistics:
324: # Resets the statistics counters:
325: #
326: sub ResetStatistics {
327: $Transactions = 0;
328: $Failures = 0;
329: }
330:
331: #------------------------------------------------------------------------
332: #
333: # LocalConnection
334: # Completes the formation of a locally authenticated connection.
335: # This function will ensure that the 'remote' client is really the
336: # local host. If not, the connection is closed, and the function fails.
337: # If so, initcmd is parsed for the name of a file containing the
338: # IDEA session key. The fie is opened, read, deleted and the session
339: # key returned to the caller.
340: #
341: # Parameters:
342: # $Socket - Socket open on client.
343: # $initcmd - The full text of the init command.
344: #
345: # Returns:
346: # IDEA session key on success.
347: # undef on failure.
348: #
349: sub LocalConnection {
350: my ($Socket, $initcmd) = @_;
351: Debug("Attempting local connection: $initcmd client: $clientip");
352: if($clientip ne "127.0.0.1") {
353: &logthis('<font color="red"> LocalConnection rejecting non local: '
354: ."$clientip ne 127.0.0.1 </font>");
355: close $Socket;
356: return undef;
357: } else {
358: chomp($initcmd); # Get rid of \n in filename.
359: my ($init, $type, $name) = split(/:/, $initcmd);
360: Debug(" Init command: $init $type $name ");
361:
362: # Require that $init = init, and $type = local: Otherwise
363: # the caller is insane:
364:
365: if(($init ne "init") && ($type ne "local")) {
366: &logthis('<font color = "red"> LocalConnection: caller is insane! '
367: ."init = $init, and type = $type </font>");
368: close($Socket);;
369: return undef;
370:
371: }
372: # Now get the key filename:
373:
374: my $IDEAKey = lonlocal::ReadKeyFile($name);
375: return $IDEAKey;
376: }
377: }
378: #------------------------------------------------------------------------------
379: #
380: # SSLConnection
381: # Completes the formation of an ssh authenticated connection. The
382: # socket is promoted to an ssl socket. If this promotion and the associated
383: # certificate exchange are successful, the IDEA key is generated and sent
384: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
385: # the caller after the SSL tunnel is torn down.
386: #
387: # Parameters:
388: # Name Type Purpose
389: # $Socket IO::Socket::INET Plaintext socket.
390: #
391: # Returns:
392: # IDEA key on success.
393: # undef on failure.
394: #
395: sub SSLConnection {
396: my $Socket = shift;
397:
398: Debug("SSLConnection: ");
399: my $KeyFile = lonssl::KeyFile();
400: if(!$KeyFile) {
401: my $err = lonssl::LastError();
402: &logthis("<font color=\"red\"> CRITICAL"
403: ."Can't get key file $err </font>");
404: return undef;
405: }
406: my ($CACertificate,
407: $Certificate) = lonssl::CertificateFile();
408:
409:
410: # If any of the key, certificate or certificate authority
411: # certificate filenames are not defined, this can't work.
412:
413: if((!$Certificate) || (!$CACertificate)) {
414: my $err = lonssl::LastError();
415: &logthis("<font color=\"red\"> CRITICAL"
416: ."Can't get certificates: $err </font>");
417:
418: return undef;
419: }
420: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
421:
422: # Indicate to our peer that we can procede with
423: # a transition to ssl authentication:
424:
425: print $Socket "ok:ssl\n";
426:
427: Debug("Approving promotion -> ssl");
428: # And do so:
429:
430: my $CRLFile;
431: unless ($crlchecked{$clientname}) {
432: $CRLFile = lonssl::CRLFile();
433: $crlchecked{$clientname} = 1;
434: }
435:
436: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
437: $CACertificate,
438: $Certificate,
439: $KeyFile,
440: $clientname,
441: $CRLFile,
442: $clientversion);
443: if(! ($SSLSocket) ) { # SSL socket promotion failed.
444: my $err = lonssl::LastError();
445: &logthis("<font color=\"red\"> CRITICAL "
446: ."SSL Socket promotion failed: $err </font>");
447: return undef;
448: }
449: Debug("SSL Promotion successful");
450:
451: #
452: # The only thing we'll use the socket for is to send the IDEA key
453: # to the peer:
454:
455: my $Key = lonlocal::CreateCipherKey();
456: print $SSLSocket "$Key\n";
457:
458: lonssl::Close($SSLSocket);
459:
460: Debug("Key exchange complete: $Key");
461:
462: return $Key;
463: }
464: #
465: # InsecureConnection:
466: # If insecure connections are allowd,
467: # exchange a challenge with the client to 'validate' the
468: # client (not really, but that's the protocol):
469: # We produce a challenge string that's sent to the client.
470: # The client must then echo the challenge verbatim to us.
471: #
472: # Parameter:
473: # Socket - Socket open on the client.
474: # Returns:
475: # 1 - success.
476: # 0 - failure (e.g.mismatch or insecure not allowed).
477: #
478: sub InsecureConnection {
479: my $Socket = shift;
480:
481: # Don't even start if insecure connections are not allowed.
482: # return 0 if Insecure connections not allowed.
483: #
484: if (ref($secureconf{'connfrom'}) eq 'HASH') {
485: if ($clientsamedom) {
486: if ($secureconf{'connfrom'}{'dom'} eq 'req') {
487: return 0;
488: }
489: } elsif ($clientsameinst) {
490: if ($secureconf{'connfrom'}{'intdom'} eq 'req') {
491: return 0;
492: }
493: } else {
494: if ($secureconf{'connfrom'}{'other'} eq 'req') {
495: return 0;
496: }
497: }
498: } elsif (!$perlvar{londAllowInsecure}) {
499: return 0;
500: }
501:
502: # Fabricate a challenge string and send it..
503:
504: my $challenge = "$$".time; # pid + time.
505: print $Socket "$challenge\n";
506: &status("Waiting for challenge reply");
507:
508: my $answer = <$Socket>;
509: $answer =~s/\W//g;
510: if($challenge eq $answer) {
511: return 1;
512: } else {
513: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
514: &status("No challenge reqply");
515: return 0;
516: }
517:
518:
519: }
520: #
521: # Safely execute a command (as long as it's not a shel command and doesn
522: # not require/rely on shell escapes. The function operates by doing a
523: # a pipe based fork and capturing stdout and stderr from the pipe.
524: #
525: # Formal Parameters:
526: # $line - A line of text to be executed as a command.
527: # Returns:
528: # The output from that command. If the output is multiline the caller
529: # must know how to split up the output.
530: #
531: #
532: sub execute_command {
533: my ($line) = @_;
534: my @words = split(/\s/, $line); # Bust the command up into words.
535: my $output = "";
536:
537: my $pid = open(CHILD, "-|");
538:
539: if($pid) { # Parent process
540: Debug("In parent process for execute_command");
541: my @data = <CHILD>; # Read the child's outupt...
542: close CHILD;
543: foreach my $output_line (@data) {
544: Debug("Adding $output_line");
545: $output .= $output_line; # Presumably has a \n on it.
546: }
547:
548: } else { # Child process
549: close (STDERR);
550: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
551: exec(@words); # won't return.
552: }
553: return $output;
554: }
555:
556:
557: # GetCertificate: Given a transaction that requires a certificate,
558: # this function will extract the certificate from the transaction
559: # request. Note that at this point, the only concept of a certificate
560: # is the hostname to which we are connected.
561: #
562: # Parameter:
563: # request - The request sent by our client (this parameterization may
564: # need to change when we really use a certificate granting
565: # authority.
566: #
567: sub GetCertificate {
568: my $request = shift;
569:
570: return $clientip;
571: }
572:
573: #
574: # Return true if client is a manager.
575: #
576: sub isManager {
577: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
578: }
579: #
580: # Return tru if client can do client functions
581: #
582: sub isClient {
583: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
584: }
585:
586:
587: #
588: # ReadManagerTable: Reads in the current manager table. For now this is
589: # done on each manager authentication because:
590: # - These authentications are not frequent
591: # - This allows dynamic changes to the manager table
592: # without the need to signal to the lond.
593: #
594: sub ReadManagerTable {
595:
596: &Debug("Reading manager table");
597: # Clean out the old table first..
598:
599: foreach my $key (keys %managers) {
600: delete $managers{$key};
601: }
602:
603: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
604: if (!open (MANAGERS, $tablename)) {
605: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
606: if (&Apache::lonnet::is_LC_dns($hostname)) {
607: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
608: }
609: return;
610: }
611: while(my $host = <MANAGERS>) {
612: chomp($host);
613: if ($host =~ "^#") { # Comment line.
614: next;
615: }
616: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
617: # The entry is of the form:
618: # cluname:hostname
619: # cluname - A 'cluster hostname' is needed in order to negotiate
620: # the host key.
621: # hostname- The dns name of the host.
622: #
623: my($cluname, $dnsname) = split(/:/, $host);
624:
625: my $ip = gethostbyname($dnsname);
626: if(defined($ip)) { # bad names don't deserve entry.
627: my $hostip = inet_ntoa($ip);
628: $managers{$hostip} = $cluname;
629: logthis('<font color="green"> registering manager '.
630: "$dnsname as $cluname with $hostip </font>\n");
631: }
632: } else {
633: logthis('<font color="green"> existing host'." $host</font>\n");
634: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
635: }
636: }
637: }
638:
639: #
640: # ValidManager: Determines if a given certificate represents a valid manager.
641: # in this primitive implementation, the 'certificate' is
642: # just the connecting loncapa client name. This is checked
643: # against a valid client list in the configuration.
644: #
645: #
646: sub ValidManager {
647: my $certificate = shift;
648:
649: return isManager;
650: }
651: #
652: # CopyFile: Called as part of the process of installing a
653: # new configuration file. This function copies an existing
654: # file to a backup file.
655: # Parameters:
656: # oldfile - Name of the file to backup.
657: # newfile - Name of the backup file.
658: # Return:
659: # 0 - Failure (errno has failure reason).
660: # 1 - Success.
661: #
662: sub CopyFile {
663:
664: my ($oldfile, $newfile) = @_;
665:
666: if (! copy($oldfile,$newfile)) {
667: return 0;
668: }
669: chmod(0660, $newfile);
670: return 1;
671: }
672: #
673: # Host files are passed out with externally visible host IPs.
674: # If, for example, we are behind a fire-wall or NAT host, our
675: # internally visible IP may be different than the externally
676: # visible IP. Therefore, we always adjust the contents of the
677: # host file so that the entry for ME is the IP that we believe
678: # we have. At present, this is defined as the entry that
679: # DNS has for us. If by some chance we are not able to get a
680: # DNS translation for us, then we assume that the host.tab file
681: # is correct.
682: # BUGBUGBUG - in the future, we really should see if we can
683: # easily query the interface(s) instead.
684: # Parameter(s):
685: # contents - The contents of the host.tab to check.
686: # Returns:
687: # newcontents - The adjusted contents.
688: #
689: #
690: sub AdjustHostContents {
691: my $contents = shift;
692: my $adjusted;
693: my $me = $perlvar{'lonHostID'};
694:
695: foreach my $line (split(/\n/,$contents)) {
696: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
697: ($line =~ /^\s*\^/))) {
698: chomp($line);
699: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
700: if ($id eq $me) {
701: my $ip = gethostbyname($name);
702: my $ipnew = inet_ntoa($ip);
703: $ip = $ipnew;
704: # Reconstruct the host line and append to adjusted:
705:
706: my $newline = "$id:$domain:$role:$name:$ip";
707: if($maxcon ne "") { # Not all hosts have loncnew tuning params
708: $newline .= ":$maxcon:$idleto:$mincon";
709: }
710: $adjusted .= $newline."\n";
711:
712: } else { # Not me, pass unmodified.
713: $adjusted .= $line."\n";
714: }
715: } else { # Blank or comment never re-written.
716: $adjusted .= $line."\n"; # Pass blanks and comments as is.
717: }
718: }
719: return $adjusted;
720: }
721: #
722: # InstallFile: Called to install an administrative file:
723: # - The file is created int a temp directory called <name>.tmp
724: # - lcinstall file is called to install the file.
725: # since the web app has no direct write access to the table directory
726: #
727: # Parameters:
728: # Name of the file
729: # File Contents.
730: # Return:
731: # nonzero - success.
732: # 0 - failure and $! has an errno.
733: # Assumptions:
734: # File installtion is a relatively infrequent
735: #
736: sub InstallFile {
737:
738: my ($Filename, $Contents) = @_;
739: # my $TempFile = $Filename.".tmp";
740: my $exedir = $perlvar{'lonDaemons'};
741: my $tmpdir = $exedir.'/tmp/';
742: my $TempFile = $tmpdir."TempTableFile.tmp";
743:
744: # Open the file for write:
745:
746: my $fh = IO::File->new("> $TempFile"); # Write to temp.
747: if(!(defined $fh)) {
748: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
749: return 0;
750: }
751: # write the contents of the file:
752:
753: print $fh ($Contents);
754: $fh->close; # In case we ever have a filesystem w. locking
755:
756: chmod(0664, $TempFile); # Everyone can write it.
757:
758: # Use lcinstall file to put the file in the table directory...
759:
760: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
761: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
762: close $pf;
763: my $err = $?;
764: &Debug("Status is $err");
765: if ($err != 0) {
766: my $msg = $err;
767: if ($err < @installerrors) {
768: $msg = $installerrors[$err];
769: }
770: &logthis("Install failed for table file $Filename : $msg");
771: return 0;
772: }
773:
774: # Remove the temp file:
775:
776: unlink($TempFile);
777:
778: return 1;
779: }
780:
781:
782: #
783: # ConfigFileFromSelector: converts a configuration file selector
784: # into a configuration file pathname.
785: # Supports the following file selectors:
786: # hosts, domain, dns_hosts, dns_domain
787: #
788: #
789: # Parameters:
790: # selector - Configuration file selector.
791: # Returns:
792: # Full path to the file or undef if the selector is invalid.
793: #
794: sub ConfigFileFromSelector {
795: my $selector = shift;
796: my $tablefile;
797:
798: if ($selector eq 'loncapaCAcrl') {
799: my $tabledir = $perlvar{'lonCertificateDirectory'};
800: if (-d $tabledir) {
801: $tablefile = $tabledir.'/'.$selector.'.pem';
802: }
803: } else {
804: my $tabledir = $perlvar{'lonTabDir'}.'/';
805: if (($selector eq "hosts") || ($selector eq "domain") ||
806: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
807: $tablefile = $tabledir.$selector.'.tab';
808: }
809: }
810: return $tablefile;
811: }
812: #
813: # PushFile: Called to do an administrative push of a file.
814: # - Ensure the file being pushed is one we support.
815: # - Backup the old file to <filename.saved>
816: # - Separate the contents of the new file out from the
817: # rest of the request.
818: # - Write the new file.
819: # Parameter:
820: # Request - The entire user request. This consists of a : separated
821: # string pushfile:tablename:contents.
822: # NOTE: The contents may have :'s in it as well making things a bit
823: # more interesting... but not much.
824: # Returns:
825: # String to send to client ("ok" or "refused" if bad file).
826: #
827: sub PushFile {
828: my $request = shift;
829: my ($command, $filename, $contents) = split(":", $request, 3);
830: &Debug("PushFile");
831:
832: # At this point in time, pushes for only the following tables and
833: # CRL file are supported:
834: # hosts.tab ($filename eq host).
835: # domain.tab ($filename eq domain).
836: # dns_hosts.tab ($filename eq dns_host).
837: # dns_domain.tab ($filename eq dns_domain).
838: # loncapaCAcrl.pem ($filename eq loncapaCAcrl).
839: # Construct the destination filename or reject the request.
840: #
841: # lonManage is supposed to ensure this, however this session could be
842: # part of some elaborate spoof that managed somehow to authenticate.
843: #
844:
845:
846: my $tablefile = ConfigFileFromSelector($filename);
847: if(! (defined $tablefile)) {
848: return "refused";
849: }
850:
851: # If the file being pushed is the host file, we adjust the entry for ourself so that the
852: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
853: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
854: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
855: # that possibilty.
856:
857: if($filename eq "host") {
858: $contents = AdjustHostContents($contents);
859: } elsif (($filename eq 'dns_host') || ($filename eq 'dns_domain') ||
860: ($filename eq 'loncapaCAcrl')) {
861: if ($contents eq '') {
862: &logthis('<font color="red"> Pushfile: unable to install '
863: .$tablefile." - no data received from push. </font>");
864: return 'error: push had no data';
865: }
866: if (&Apache::lonnet::get_host_ip($clientname)) {
867: my $clienthost = &Apache::lonnet::hostname($clientname);
868: if ($managers{$clientip} eq $clientname) {
869: my $clientprotocol = $Apache::lonnet::protocol{$clientname};
870: $clientprotocol = 'http' if ($clientprotocol ne 'https');
871: my $url;
872: if ($filename eq 'loncapaCAcrl') {
873: $url = '/adm/dns/loncapaCRL';
874: } else {
875: $url = '/adm/'.$filename;
876: $url =~ s{_}{/};
877: }
878: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
879: my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
880: if ($response->is_error()) {
881: &logthis('<font color="red"> Pushfile: unable to install '
882: .$tablefile." - error attempting to pull data. </font>");
883: return 'error: pull failed';
884: } else {
885: my $result = $response->content;
886: chomp($result);
887: unless ($result eq $contents) {
888: &logthis('<font color="red"> Pushfile: unable to install '
889: .$tablefile." - pushed data and pulled data differ. </font>");
890: my $pushleng = length($contents);
891: my $pullleng = length($result);
892: if ($pushleng != $pullleng) {
893: return "error: $pushleng vs $pullleng bytes";
894: } else {
895: return "error: mismatch push and pull";
896: }
897: }
898: }
899: }
900: }
901: }
902:
903: # Install the new file:
904:
905: &logthis("Installing new $tablefile contents:\n$contents");
906: if(!InstallFile($tablefile, $contents)) {
907: &logthis('<font color="red"> Pushfile: unable to install '
908: .$tablefile." $! </font>");
909: return "error:$!";
910: } else {
911: &logthis('<font color="green"> Installed new '.$tablefile
912: ." - transaction by: $clientname ($clientip)</font>");
913: my $adminmail = $perlvar{'lonAdmEMail'};
914: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
915: if ($admindom ne '') {
916: my %domconfig =
917: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
918: if (ref($domconfig{'contacts'}) eq 'HASH') {
919: if ($domconfig{'contacts'}{'adminemail'} ne '') {
920: $adminmail = $domconfig{'contacts'}{'adminemail'};
921: }
922: }
923: }
924: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
925: my $msg = new Mail::Send;
926: $msg->to($adminmail);
927: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
928: $msg->add('Content-type','text/plain; charset=UTF-8');
929: if (my $fh = $msg->open()) {
930: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
931: "$clientname ($clientip)\n";
932: $fh->close;
933: }
934: }
935: }
936:
937: # Indicate success:
938:
939: return "ok";
940:
941: }
942:
943: #
944: # Called to re-init either lonc or lond.
945: #
946: # Parameters:
947: # request - The full request by the client. This is of the form
948: # reinit:<process>
949: # where <process> is allowed to be either of
950: # lonc or lond
951: #
952: # Returns:
953: # The string to be sent back to the client either:
954: # ok - Everything worked just fine.
955: # error:why - There was a failure and why describes the reason.
956: #
957: #
958: sub ReinitProcess {
959: my $request = shift;
960:
961:
962: # separate the request (reinit) from the process identifier and
963: # validate it producing the name of the .pid file for the process.
964: #
965: #
966: my ($junk, $process) = split(":", $request);
967: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
968: if($process eq 'lonc') {
969: $processpidfile = $processpidfile."lonc.pid";
970: if (!open(PIDFILE, "< $processpidfile")) {
971: return "error:Open failed for $processpidfile";
972: }
973: my $loncpid = <PIDFILE>;
974: close(PIDFILE);
975: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
976: ."</font>");
977: kill("USR2", $loncpid);
978: } elsif ($process eq 'lond') {
979: logthis('<font color="red"> Reinitializing self (lond) </font>');
980: &UpdateHosts; # Lond is us!!
981: } else {
982: &logthis('<font color="yellow" Invalid reinit request for '.$process
983: ."</font>");
984: return "error:Invalid process identifier $process";
985: }
986: return 'ok';
987: }
988: # Validate a line in a configuration file edit script:
989: # Validation includes:
990: # - Ensuring the command is valid.
991: # - Ensuring the command has sufficient parameters
992: # Parameters:
993: # scriptline - A line to validate (\n has been stripped for what it's worth).
994: #
995: # Return:
996: # 0 - Invalid scriptline.
997: # 1 - Valid scriptline
998: # NOTE:
999: # Only the command syntax is checked, not the executability of the
1000: # command.
1001: #
1002: sub isValidEditCommand {
1003: my $scriptline = shift;
1004:
1005: # Line elements are pipe separated:
1006:
1007: my ($command, $key, $newline) = split(/\|/, $scriptline);
1008: &logthis('<font color="green"> isValideditCommand checking: '.
1009: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
1010:
1011: if ($command eq "delete") {
1012: #
1013: # key with no newline.
1014: #
1015: if( ($key eq "") || ($newline ne "")) {
1016: return 0; # Must have key but no newline.
1017: } else {
1018: return 1; # Valid syntax.
1019: }
1020: } elsif ($command eq "replace") {
1021: #
1022: # key and newline:
1023: #
1024: if (($key eq "") || ($newline eq "")) {
1025: return 0;
1026: } else {
1027: return 1;
1028: }
1029: } elsif ($command eq "append") {
1030: if (($key ne "") && ($newline eq "")) {
1031: return 1;
1032: } else {
1033: return 0;
1034: }
1035: } else {
1036: return 0; # Invalid command.
1037: }
1038: return 0; # Should not get here!!!
1039: }
1040: #
1041: # ApplyEdit - Applies an edit command to a line in a configuration
1042: # file. It is the caller's responsiblity to validate the
1043: # edit line.
1044: # Parameters:
1045: # $directive - A single edit directive to apply.
1046: # Edit directives are of the form:
1047: # append|newline - Appends a new line to the file.
1048: # replace|key|newline - Replaces the line with key value 'key'
1049: # delete|key - Deletes the line with key value 'key'.
1050: # $editor - A config file editor object that contains the
1051: # file being edited.
1052: #
1053: sub ApplyEdit {
1054:
1055: my ($directive, $editor) = @_;
1056:
1057: # Break the directive down into its command and its parameters
1058: # (at most two at this point. The meaning of the parameters, if in fact
1059: # they exist depends on the command).
1060:
1061: my ($command, $p1, $p2) = split(/\|/, $directive);
1062:
1063: if($command eq "append") {
1064: $editor->Append($p1); # p1 - key p2 null.
1065: } elsif ($command eq "replace") {
1066: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
1067: } elsif ($command eq "delete") {
1068: $editor->DeleteLine($p1); # p1 - key p2 null.
1069: } else { # Should not get here!!!
1070: die "Invalid command given to ApplyEdit $command"
1071: }
1072: }
1073: #
1074: # AdjustOurHost:
1075: # Adjusts a host file stored in a configuration file editor object
1076: # for the true IP address of this host. This is necessary for hosts
1077: # that live behind a firewall.
1078: # Those hosts have a publicly distributed IP of the firewall, but
1079: # internally must use their actual IP. We assume that a given
1080: # host only has a single IP interface for now.
1081: # Formal Parameters:
1082: # editor - The configuration file editor to adjust. This
1083: # editor is assumed to contain a hosts.tab file.
1084: # Strategy:
1085: # - Figure out our hostname.
1086: # - Lookup the entry for this host.
1087: # - Modify the line to contain our IP
1088: # - Do a replace for this host.
1089: sub AdjustOurHost {
1090: my $editor = shift;
1091:
1092: # figure out who I am.
1093:
1094: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
1095:
1096: # Get my host file entry.
1097:
1098: my $ConfigLine = $editor->Find($myHostName);
1099: if(! (defined $ConfigLine)) {
1100: die "AdjustOurHost - no entry for me in hosts file $myHostName";
1101: }
1102: # figure out my IP:
1103: # Use the config line to get my hostname.
1104: # Use gethostbyname to translate that into an IP address.
1105: #
1106: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1107: #
1108: # Reassemble the config line from the elements in the list.
1109: # Note that if the loncnew items were not present before, they will
1110: # be now even if they would be empty
1111: #
1112: my $newConfigLine = $id;
1113: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1114: $newConfigLine .= ":".$item;
1115: }
1116: # Replace the line:
1117:
1118: $editor->ReplaceLine($id, $newConfigLine);
1119:
1120: }
1121: #
1122: # ReplaceConfigFile:
1123: # Replaces a configuration file with the contents of a
1124: # configuration file editor object.
1125: # This is done by:
1126: # - Copying the target file to <filename>.old
1127: # - Writing the new file to <filename>.tmp
1128: # - Moving <filename.tmp> -> <filename>
1129: # This laborious process ensures that the system is never without
1130: # a configuration file that's at least valid (even if the contents
1131: # may be dated).
1132: # Parameters:
1133: # filename - Name of the file to modify... this is a full path.
1134: # editor - Editor containing the file.
1135: #
1136: sub ReplaceConfigFile {
1137:
1138: my ($filename, $editor) = @_;
1139:
1140: CopyFile ($filename, $filename.".old");
1141:
1142: my $contents = $editor->Get(); # Get the contents of the file.
1143:
1144: InstallFile($filename, $contents);
1145: }
1146: #
1147: #
1148: # Called to edit a configuration table file
1149: # Parameters:
1150: # request - The entire command/request sent by lonc or lonManage
1151: # Return:
1152: # The reply to send to the client.
1153: #
1154: sub EditFile {
1155: my $request = shift;
1156:
1157: # Split the command into it's pieces: edit:filetype:script
1158:
1159: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1160:
1161: # Check the pre-coditions for success:
1162:
1163: if($cmd != "edit") { # Something is amiss afoot alack.
1164: return "error:edit request detected, but request != 'edit'\n";
1165: }
1166: if( ($filetype ne "hosts") &&
1167: ($filetype ne "domain")) {
1168: return "error:edit requested with invalid file specifier: $filetype \n";
1169: }
1170:
1171: # Split the edit script and check it's validity.
1172:
1173: my @scriptlines = split(/\n/, $script); # one line per element.
1174: my $linecount = scalar(@scriptlines);
1175: for(my $i = 0; $i < $linecount; $i++) {
1176: chomp($scriptlines[$i]);
1177: if(!isValidEditCommand($scriptlines[$i])) {
1178: return "error:edit with bad script line: '$scriptlines[$i]' \n";
1179: }
1180: }
1181:
1182: # Execute the edit operation.
1183: # - Create a config file editor for the appropriate file and
1184: # - execute each command in the script:
1185: #
1186: my $configfile = ConfigFileFromSelector($filetype);
1187: if (!(defined $configfile)) {
1188: return "refused\n";
1189: }
1190: my $editor = ConfigFileEdit->new($configfile);
1191:
1192: for (my $i = 0; $i < $linecount; $i++) {
1193: ApplyEdit($scriptlines[$i], $editor);
1194: }
1195: # If the file is the host file, ensure that our host is
1196: # adjusted to have our ip:
1197: #
1198: if($filetype eq "host") {
1199: AdjustOurHost($editor);
1200: }
1201: # Finally replace the current file with our file.
1202: #
1203: ReplaceConfigFile($configfile, $editor);
1204:
1205: return "ok\n";
1206: }
1207:
1208: # read_profile
1209: #
1210: # Returns a set of specific entries from a user's profile file.
1211: # this is a utility function that is used by both get_profile_entry and
1212: # get_profile_entry_encrypted.
1213: #
1214: # Parameters:
1215: # udom - Domain in which the user exists.
1216: # uname - User's account name (loncapa account)
1217: # namespace - The profile namespace to open.
1218: # what - A set of & separated queries.
1219: # Returns:
1220: # If all ok: - The string that needs to be shipped back to the user.
1221: # If failure - A string that starts with error: followed by the failure
1222: # reason.. note that this probabyl gets shipped back to the
1223: # user as well.
1224: #
1225: sub read_profile {
1226: my ($udom, $uname, $namespace, $what) = @_;
1227:
1228: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1229: &GDBM_READER());
1230: if ($hashref) {
1231: my @queries=split(/\&/,$what);
1232: if ($namespace eq 'roles') {
1233: @queries = map { &unescape($_); } @queries;
1234: }
1235: my $qresult='';
1236:
1237: for (my $i=0;$i<=$#queries;$i++) {
1238: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1239: }
1240: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1241: if (&untie_user_hash($hashref)) {
1242: return $qresult;
1243: } else {
1244: return "error: ".($!+0)." untie (GDBM) Failed";
1245: }
1246: } else {
1247: if ($!+0 == 2) {
1248: return "error:No such file or GDBM reported bad block error";
1249: } else {
1250: return "error: ".($!+0)." tie (GDBM) Failed";
1251: }
1252: }
1253:
1254: }
1255: #--------------------- Request Handlers --------------------------------------------
1256: #
1257: # By convention each request handler registers itself prior to the sub
1258: # declaration:
1259: #
1260:
1261: #++
1262: #
1263: # Handles ping requests.
1264: # Parameters:
1265: # $cmd - the actual keyword that invoked us.
1266: # $tail - the tail of the request that invoked us.
1267: # $replyfd- File descriptor connected to the client
1268: # Implicit Inputs:
1269: # $currenthostid - Global variable that carries the name of the host we are
1270: # known as.
1271: # Returns:
1272: # 1 - Ok to continue processing.
1273: # 0 - Program should exit.
1274: # Side effects:
1275: # Reply information is sent to the client.
1276: sub ping_handler {
1277: my ($cmd, $tail, $client) = @_;
1278: Debug("$cmd $tail $client .. $currenthostid:");
1279:
1280: Reply( $client,\$currenthostid,"$cmd:$tail");
1281:
1282: return 1;
1283: }
1284: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1285:
1286: #++
1287: #
1288: # Handles pong requests. Pong replies with our current host id, and
1289: # the results of a ping sent to us via our lonc.
1290: #
1291: # Parameters:
1292: # $cmd - the actual keyword that invoked us.
1293: # $tail - the tail of the request that invoked us.
1294: # $replyfd- File descriptor connected to the client
1295: # Implicit Inputs:
1296: # $currenthostid - Global variable that carries the name of the host we are
1297: # connected to.
1298: # Returns:
1299: # 1 - Ok to continue processing.
1300: # 0 - Program should exit.
1301: # Side effects:
1302: # Reply information is sent to the client.
1303: sub pong_handler {
1304: my ($cmd, $tail, $replyfd) = @_;
1305:
1306: my $reply=&Apache::lonnet::reply("ping",$clientname);
1307: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1308: return 1;
1309: }
1310: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1311:
1312: #++
1313: # Called to establish an encrypted session key with the remote client.
1314: # Note that with secure lond, in most cases this function is never
1315: # invoked. Instead, the secure session key is established either
1316: # via a local file that's locked down tight and only lives for a short
1317: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1318: # bits from /dev/urandom, rather than the predictable pattern used by
1319: # by this sub. This sub is only used in the old-style insecure
1320: # key negotiation.
1321: # Parameters:
1322: # $cmd - the actual keyword that invoked us.
1323: # $tail - the tail of the request that invoked us.
1324: # $replyfd- File descriptor connected to the client
1325: # Implicit Inputs:
1326: # $currenthostid - Global variable that carries the name of the host
1327: # known as.
1328: # $clientname - Global variable that carries the name of the host we're connected to.
1329: # Returns:
1330: # 1 - Ok to continue processing.
1331: # 0 - Program should exit.
1332: # Implicit Outputs:
1333: # Reply information is sent to the client.
1334: # $cipher is set with a reference to a new IDEA encryption object.
1335: #
1336: sub establish_key_handler {
1337: my ($cmd, $tail, $replyfd) = @_;
1338:
1339: my $buildkey=time.$$.int(rand 100000);
1340: $buildkey=~tr/1-6/A-F/;
1341: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1342: my $key=$currenthostid.$clientname;
1343: $key=~tr/a-z/A-Z/;
1344: $key=~tr/G-P/0-9/;
1345: $key=~tr/Q-Z/0-9/;
1346: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1347: $key=substr($key,0,32);
1348: my $cipherkey=pack("H32",$key);
1349: $cipher=new IDEA $cipherkey;
1350: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1351:
1352: return 1;
1353:
1354: }
1355: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1356:
1357: # Handler for the load command. Returns the current system load average
1358: # to the requestor.
1359: #
1360: # Parameters:
1361: # $cmd - the actual keyword that invoked us.
1362: # $tail - the tail of the request that invoked us.
1363: # $replyfd- File descriptor connected to the client
1364: # Implicit Inputs:
1365: # $currenthostid - Global variable that carries the name of the host
1366: # known as.
1367: # $clientname - Global variable that carries the name of the host we're connected to.
1368: # Returns:
1369: # 1 - Ok to continue processing.
1370: # 0 - Program should exit.
1371: # Side effects:
1372: # Reply information is sent to the client.
1373: sub load_handler {
1374: my ($cmd, $tail, $replyfd) = @_;
1375:
1376:
1377:
1378: # Get the load average from /proc/loadavg and calculate it as a percentage of
1379: # the allowed load limit as set by the perl global variable lonLoadLim
1380:
1381: my $loadavg;
1382: my $loadfile=IO::File->new('/proc/loadavg');
1383:
1384: $loadavg=<$loadfile>;
1385: $loadavg =~ s/\s.*//g; # Extract the first field only.
1386:
1387: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1388:
1389: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1390:
1391: return 1;
1392: }
1393: ®ister_handler("load", \&load_handler, 0, 1, 0);
1394:
1395: #
1396: # Process the userload request. This sub returns to the client the current
1397: # user load average. It can be invoked either by clients or managers.
1398: #
1399: # Parameters:
1400: # $cmd - the actual keyword that invoked us.
1401: # $tail - the tail of the request that invoked us.
1402: # $replyfd- File descriptor connected to the client
1403: # Implicit Inputs:
1404: # $currenthostid - Global variable that carries the name of the host
1405: # known as.
1406: # $clientname - Global variable that carries the name of the host we're connected to.
1407: # Returns:
1408: # 1 - Ok to continue processing.
1409: # 0 - Program should exit
1410: # Implicit inputs:
1411: # whatever the userload() function requires.
1412: # Implicit outputs:
1413: # the reply is written to the client.
1414: #
1415: sub user_load_handler {
1416: my ($cmd, $tail, $replyfd) = @_;
1417:
1418: my $userloadpercent=&Apache::lonnet::userload();
1419: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1420:
1421: return 1;
1422: }
1423: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1424:
1425: # Process a request for the authorization type of a user:
1426: # (userauth).
1427: #
1428: # Parameters:
1429: # $cmd - the actual keyword that invoked us.
1430: # $tail - the tail of the request that invoked us.
1431: # $replyfd- File descriptor connected to the client
1432: # Returns:
1433: # 1 - Ok to continue processing.
1434: # 0 - Program should exit
1435: # Implicit outputs:
1436: # The user authorization type is written to the client.
1437: #
1438: sub user_authorization_type {
1439: my ($cmd, $tail, $replyfd) = @_;
1440:
1441: my $userinput = "$cmd:$tail";
1442:
1443: # Pull the domain and username out of the command tail.
1444: # and call get_auth_type to determine the authentication type.
1445:
1446: my ($udom,$uname)=split(/:/,$tail);
1447: my $result = &get_auth_type($udom, $uname);
1448: if($result eq "nouser") {
1449: &Failure( $replyfd, "unknown_user\n", $userinput);
1450: } else {
1451: #
1452: # We only want to pass the second field from get_auth_type
1453: # for ^krb.. otherwise we'll be handing out the encrypted
1454: # password for internals e.g.
1455: #
1456: my ($type,$otherinfo) = split(/:/,$result);
1457: if($type =~ /^krb/) {
1458: $type = $result;
1459: } else {
1460: $type .= ':';
1461: }
1462: &Reply( $replyfd, \$type, $userinput);
1463: }
1464:
1465: return 1;
1466: }
1467: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1468:
1469: # Process a request by a manager to push a hosts or domain table
1470: # to us. We pick apart the command and pass it on to the subs
1471: # that already exist to do this.
1472: #
1473: # Parameters:
1474: # $cmd - the actual keyword that invoked us.
1475: # $tail - the tail of the request that invoked us.
1476: # $client - File descriptor connected to the client
1477: # Returns:
1478: # 1 - Ok to continue processing.
1479: # 0 - Program should exit
1480: # Implicit Output:
1481: # a reply is written to the client.
1482: sub push_file_handler {
1483: my ($cmd, $tail, $client) = @_;
1484: &Debug("In push file handler");
1485: my $userinput = "$cmd:$tail";
1486:
1487: # At this time we only know that the IP of our partner is a valid manager
1488: # the code below is a hook to do further authentication (e.g. to resolve
1489: # spoofing).
1490:
1491: my $cert = &GetCertificate($userinput);
1492: if(&ValidManager($cert)) {
1493: &Debug("Valid manager: $client");
1494:
1495: # Now presumably we have the bona fides of both the peer host and the
1496: # process making the request.
1497:
1498: my $reply = &PushFile($userinput);
1499: &Reply($client, \$reply, $userinput);
1500:
1501: } else {
1502: &logthis("push_file_handler $client is not valid");
1503: &Failure( $client, "refused\n", $userinput);
1504: }
1505: return 1;
1506: }
1507: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1508:
1509: # The du_handler routine should be considered obsolete and is retained
1510: # for communication with legacy servers. Please see the du2_handler.
1511: #
1512: # du - list the disk usage of a directory recursively.
1513: #
1514: # note: stolen code from the ls file handler
1515: # under construction by Rick Banghart
1516: # .
1517: # Parameters:
1518: # $cmd - The command that dispatched us (du).
1519: # $ududir - The directory path to list... I'm not sure what this
1520: # is relative as things like ls:. return e.g.
1521: # no_such_dir.
1522: # $client - Socket open on the client.
1523: # Returns:
1524: # 1 - indicating that the daemon should not disconnect.
1525: # Side Effects:
1526: # The reply is written to $client.
1527: #
1528: sub du_handler {
1529: my ($cmd, $ududir, $client) = @_;
1530: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1531: my $userinput = "$cmd:$ududir";
1532:
1533: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1534: &Failure($client,"refused\n","$cmd:$ududir");
1535: return 1;
1536: }
1537: # Since $ududir could have some nasties in it,
1538: # we will require that ududir is a valid
1539: # directory. Just in case someone tries to
1540: # slip us a line like .;(cd /home/httpd rm -rf*)
1541: # etc.
1542: #
1543: if (-d $ududir) {
1544: my $total_size=0;
1545: my $code=sub {
1546: if ($_=~/\.\d+\./) { return;}
1547: if ($_=~/\.meta$/) { return;}
1548: if (-d $_) { return;}
1549: $total_size+=(stat($_))[7];
1550: };
1551: chdir($ududir);
1552: find($code,$ududir);
1553: $total_size=int($total_size/1024);
1554: &Reply($client,\$total_size,"$cmd:$ududir");
1555: } else {
1556: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1557: }
1558: return 1;
1559: }
1560: ®ister_handler("du", \&du_handler, 0, 1, 0);
1561:
1562: # Please also see the du_handler, which is obsoleted by du2.
1563: # du2_handler differs from du_handler in that required path to directory
1564: # provided by &propath() is prepended in the handler instead of on the
1565: # client side.
1566: #
1567: # du2 - list the disk usage of a directory recursively.
1568: #
1569: # Parameters:
1570: # $cmd - The command that dispatched us (du).
1571: # $tail - The tail of the request that invoked us.
1572: # $tail is a : separated list of the following:
1573: # - $ududir - directory path to list (before prepending)
1574: # - $getpropath = 1 if &propath() should prepend
1575: # - $uname - username to use for &propath or user dir
1576: # - $udom - domain to use for &propath or user dir
1577: # All are escaped.
1578: # $client - Socket open on the client.
1579: # Returns:
1580: # 1 - indicating that the daemon should not disconnect.
1581: # Side Effects:
1582: # The reply is written to $client.
1583: #
1584:
1585: sub du2_handler {
1586: my ($cmd, $tail, $client) = @_;
1587: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1588: my $userinput = "$cmd:$tail";
1589: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1590: &Failure($client,"refused\n","$cmd:$tail");
1591: return 1;
1592: }
1593: if ($getpropath) {
1594: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1595: $ududir = &propath($udom,$uname).'/'.$ududir;
1596: } else {
1597: &Failure($client,"refused\n","$cmd:$tail");
1598: return 1;
1599: }
1600: }
1601: # Since $ududir could have some nasties in it,
1602: # we will require that ududir is a valid
1603: # directory. Just in case someone tries to
1604: # slip us a line like .;(cd /home/httpd rm -rf*)
1605: # etc.
1606: #
1607: if (-d $ududir) {
1608: my $total_size=0;
1609: my $code=sub {
1610: if ($_=~/\.\d+\./) { return;}
1611: if ($_=~/\.meta$/) { return;}
1612: if (-d $_) { return;}
1613: $total_size+=(stat($_))[7];
1614: };
1615: chdir($ududir);
1616: find($code,$ududir);
1617: $total_size=int($total_size/1024);
1618: &Reply($client,\$total_size,"$cmd:$ududir");
1619: } else {
1620: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1621: }
1622: return 1;
1623: }
1624: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1625:
1626: #
1627: # The ls_handler routine should be considered obsolete and is retained
1628: # for communication with legacy servers. Please see the ls3_handler.
1629: #
1630: # ls - list the contents of a directory. For each file in the
1631: # selected directory the filename followed by the full output of
1632: # the stat function is returned. The returned info for each
1633: # file are separated by ':'. The stat fields are separated by &'s.
1634: #
1635: # If the requested path contains /../ or is:
1636: #
1637: # 1. for a directory, and the path does not begin with one of:
1638: # (a) /home/httpd/html/res/<domain>
1639: # (b) /home/httpd/html/userfiles/
1640: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1641: # or is:
1642: #
1643: # 2. for a file, and the path (after prepending) does not begin with one of:
1644: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1645: # (b) /home/httpd/html/res/<domain>/<username>/
1646: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1647: #
1648: # the response will be "refused".
1649: #
1650: # Parameters:
1651: # $cmd - The command that dispatched us (ls).
1652: # $ulsdir - The directory path to list... I'm not sure what this
1653: # is relative as things like ls:. return e.g.
1654: # no_such_dir.
1655: # $client - Socket open on the client.
1656: # Returns:
1657: # 1 - indicating that the daemon should not disconnect.
1658: # Side Effects:
1659: # The reply is written to $client.
1660: #
1661: sub ls_handler {
1662: # obsoleted by ls2_handler
1663: my ($cmd, $ulsdir, $client) = @_;
1664:
1665: my $userinput = "$cmd:$ulsdir";
1666:
1667: my $obs;
1668: my $rights;
1669: my $ulsout='';
1670: my $ulsfn;
1671: if ($ulsdir =~m{/\.\./}) {
1672: &Failure($client,"refused\n",$userinput);
1673: return 1;
1674: }
1675: if (-e $ulsdir) {
1676: if(-d $ulsdir) {
1677: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1678: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1679: &Failure($client,"refused\n",$userinput);
1680: return 1;
1681: }
1682: if (opendir(LSDIR,$ulsdir)) {
1683: while ($ulsfn=readdir(LSDIR)) {
1684: undef($obs);
1685: undef($rights);
1686: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1687: #We do some obsolete checking here
1688: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1689: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1690: my @obsolete=<FILE>;
1691: foreach my $obsolete (@obsolete) {
1692: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1693: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1694: }
1695: }
1696: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1697: if($obs eq '1') { $ulsout.="&1"; }
1698: else { $ulsout.="&0"; }
1699: if($rights eq '1') { $ulsout.="&1:"; }
1700: else { $ulsout.="&0:"; }
1701: }
1702: closedir(LSDIR);
1703: }
1704: } else {
1705: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1706: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1707: &Failure($client,"refused\n",$userinput);
1708: return 1;
1709: }
1710: my @ulsstats=stat($ulsdir);
1711: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1712: }
1713: } else {
1714: $ulsout='no_such_dir';
1715: }
1716: if ($ulsout eq '') { $ulsout='empty'; }
1717: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1718:
1719: return 1;
1720:
1721: }
1722: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1723:
1724: # The ls2_handler routine should be considered obsolete and is retained
1725: # for communication with legacy servers. Please see the ls3_handler.
1726: # Please also see the ls_handler, which was itself obsoleted by ls2.
1727: # ls2_handler differs from ls_handler in that it escapes its return
1728: # values before concatenating them together with ':'s.
1729: #
1730: # ls2 - list the contents of a directory. For each file in the
1731: # selected directory the filename followed by the full output of
1732: # the stat function is returned. The returned info for each
1733: # file are separated by ':'. The stat fields are separated by &'s.
1734: #
1735: # If the requested path contains /../ or is:
1736: #
1737: # 1. for a directory, and the path does not begin with one of:
1738: # (a) /home/httpd/html/res/<domain>
1739: # (b) /home/httpd/html/userfiles/
1740: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1741: # or is:
1742: #
1743: # 2. for a file, and the path (after prepending) does not begin with one of:
1744: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1745: # (b) /home/httpd/html/res/<domain>/<username>/
1746: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1747: #
1748: # the response will be "refused".
1749: #
1750: # Parameters:
1751: # $cmd - The command that dispatched us (ls).
1752: # $ulsdir - The directory path to list... I'm not sure what this
1753: # is relative as things like ls:. return e.g.
1754: # no_such_dir.
1755: # $client - Socket open on the client.
1756: # Returns:
1757: # 1 - indicating that the daemon should not disconnect.
1758: # Side Effects:
1759: # The reply is written to $client.
1760: #
1761: sub ls2_handler {
1762: my ($cmd, $ulsdir, $client) = @_;
1763:
1764: my $userinput = "$cmd:$ulsdir";
1765:
1766: my $obs;
1767: my $rights;
1768: my $ulsout='';
1769: my $ulsfn;
1770: if ($ulsdir =~m{/\.\./}) {
1771: &Failure($client,"refused\n",$userinput);
1772: return 1;
1773: }
1774: if (-e $ulsdir) {
1775: if(-d $ulsdir) {
1776: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1777: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1778: &Failure($client,"refused\n","$userinput");
1779: return 1;
1780: }
1781: if (opendir(LSDIR,$ulsdir)) {
1782: while ($ulsfn=readdir(LSDIR)) {
1783: undef($obs);
1784: undef($rights);
1785: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1786: #We do some obsolete checking here
1787: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1788: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1789: my @obsolete=<FILE>;
1790: foreach my $obsolete (@obsolete) {
1791: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1792: if($obsolete =~ m|(<copyright>)(default)|) {
1793: $rights = 1;
1794: }
1795: }
1796: }
1797: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1798: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1799: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1800: $ulsout.= &escape($tmp).':';
1801: }
1802: closedir(LSDIR);
1803: }
1804: } else {
1805: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1806: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1807: &Failure($client,"refused\n",$userinput);
1808: return 1;
1809: }
1810: my @ulsstats=stat($ulsdir);
1811: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1812: }
1813: } else {
1814: $ulsout='no_such_dir';
1815: }
1816: if ($ulsout eq '') { $ulsout='empty'; }
1817: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1818: return 1;
1819: }
1820: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1821: #
1822: # ls3 - list the contents of a directory. For each file in the
1823: # selected directory the filename followed by the full output of
1824: # the stat function is returned. The returned info for each
1825: # file are separated by ':'. The stat fields are separated by &'s.
1826: #
1827: # If the requested path (after prepending) contains /../ or is:
1828: #
1829: # 1. for a directory, and the path does not begin with one of:
1830: # (a) /home/httpd/html/res/<domain>
1831: # (b) /home/httpd/html/userfiles/
1832: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1833: # (d) /home/httpd/html/priv/<domain> and client is the homeserver
1834: #
1835: # or is:
1836: #
1837: # 2. for a file, and the path (after prepending) does not begin with one of:
1838: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1839: # (b) /home/httpd/html/res/<domain>/<username>/
1840: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1841: # (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver
1842: #
1843: # the response will be "refused".
1844: #
1845: # Parameters:
1846: # $cmd - The command that dispatched us (ls).
1847: # $tail - The tail of the request that invoked us.
1848: # $tail is a : separated list of the following:
1849: # - $ulsdir - directory path to list (before prepending)
1850: # - $getpropath = 1 if &propath() should prepend
1851: # - $getuserdir = 1 if path to user dir in lonUsers should
1852: # prepend
1853: # - $alternate_root - path to prepend
1854: # - $uname - username to use for &propath or user dir
1855: # - $udom - domain to use for &propath or user dir
1856: # All of these except $getpropath and &getuserdir are escaped.
1857: # no_such_dir.
1858: # $client - Socket open on the client.
1859: # Returns:
1860: # 1 - indicating that the daemon should not disconnect.
1861: # Side Effects:
1862: # The reply is written to $client.
1863: #
1864:
1865: sub ls3_handler {
1866: my ($cmd, $tail, $client) = @_;
1867: my $userinput = "$cmd:$tail";
1868: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1869: split(/:/,$tail);
1870: if (defined($ulsdir)) {
1871: $ulsdir = &unescape($ulsdir);
1872: }
1873: if (defined($alternate_root)) {
1874: $alternate_root = &unescape($alternate_root);
1875: }
1876: if (defined($uname)) {
1877: $uname = &unescape($uname);
1878: }
1879: if (defined($udom)) {
1880: $udom = &unescape($udom);
1881: }
1882:
1883: my $dir_root = $perlvar{'lonDocRoot'};
1884: if (($getpropath) || ($getuserdir)) {
1885: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1886: $dir_root = &propath($udom,$uname);
1887: $dir_root =~ s/\/$//;
1888: } else {
1889: &Failure($client,"refused\n",$userinput);
1890: return 1;
1891: }
1892: } elsif ($alternate_root ne '') {
1893: $dir_root = $alternate_root;
1894: }
1895: if (($dir_root ne '') && ($dir_root ne '/')) {
1896: if ($ulsdir =~ /^\//) {
1897: $ulsdir = $dir_root.$ulsdir;
1898: } else {
1899: $ulsdir = $dir_root.'/'.$ulsdir;
1900: }
1901: }
1902: if ($ulsdir =~m{/\.\./}) {
1903: &Failure($client,"refused\n",$userinput);
1904: return 1;
1905: }
1906: my $islocal;
1907: my @machine_ids = &Apache::lonnet::current_machine_ids();
1908: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
1909: $islocal = 1;
1910: }
1911: my $obs;
1912: my $rights;
1913: my $ulsout='';
1914: my $ulsfn;
1915:
1916: my ($crscheck,$toplevel,$currdom,$currnum,$skip);
1917: unless ($islocal) {
1918: my ($major,$minor) = split(/\./,$clientversion);
1919: if (($major < 2) || ($major == 2 && $minor < 12)) {
1920: $crscheck = 1;
1921: }
1922: }
1923: if (-e $ulsdir) {
1924: if(-d $ulsdir) {
1925: unless (($getpropath) || ($getuserdir) ||
1926: ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1927: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) ||
1928: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) {
1929: &Failure($client,"refused\n",$userinput);
1930: return 1;
1931: }
1932: if (($crscheck) &&
1933: ($ulsdir =~ m{^/home/httpd/html/res/($LONCAPA::match_domain)(/?$|/$LONCAPA::match_courseid)})) {
1934: ($currdom,my $posscnum) = ($1,$2);
1935: if (($posscnum eq '') || ($posscnum eq '/')) {
1936: $toplevel = 1;
1937: } else {
1938: $posscnum =~ s{^/+}{};
1939: if (&LONCAPA::Lond::is_course($currdom,$posscnum)) {
1940: $skip = 1;
1941: }
1942: }
1943: }
1944: if ((!$skip) && (opendir(LSDIR,$ulsdir))) {
1945: while ($ulsfn=readdir(LSDIR)) {
1946: if (($crscheck) && ($toplevel) && ($currdom ne '') &&
1947: ($ulsfn =~ /^$LONCAPA::match_courseid$/) && (-d "$ulsdir/$ulsfn")) {
1948: if (&LONCAPA::Lond::is_course($currdom,$ulsfn)) {
1949: next;
1950: }
1951: }
1952: undef($obs);
1953: undef($rights);
1954: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1955: #We do some obsolete checking here
1956: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1957: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1958: my @obsolete=<FILE>;
1959: foreach my $obsolete (@obsolete) {
1960: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1961: if($obsolete =~ m|(<copyright>)(default)|) {
1962: $rights = 1;
1963: }
1964: }
1965: }
1966: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1967: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1968: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1969: $ulsout.= &escape($tmp).':';
1970: }
1971: closedir(LSDIR);
1972: }
1973: } else {
1974: unless (($getpropath) || ($getuserdir) ||
1975: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1976: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) ||
1977: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) {
1978: &Failure($client,"refused\n",$userinput);
1979: return 1;
1980: }
1981: my @ulsstats=stat($ulsdir);
1982: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1983: }
1984: } else {
1985: $ulsout='no_such_dir';
1986: }
1987: if ($ulsout eq '') { $ulsout='empty'; }
1988: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1989: return 1;
1990: }
1991: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1992:
1993: sub read_lonnet_global {
1994: my ($cmd,$tail,$client) = @_;
1995: my $userinput = "$cmd:$tail";
1996: my $requested = &Apache::lonnet::thaw_unescape($tail);
1997: my $result;
1998: my %packagevars = (
1999: spareid => \%Apache::lonnet::spareid,
2000: perlvar => \%Apache::lonnet::perlvar,
2001: );
2002: my %limit_to = (
2003: perlvar => {
2004: lonOtherAuthen => 1,
2005: lonBalancer => 1,
2006: lonVersion => 1,
2007: lonAdmEMail => 1,
2008: lonSupportEMail => 1,
2009: lonSysEMail => 1,
2010: lonHostID => 1,
2011: lonRole => 1,
2012: lonDefDomain => 1,
2013: lonLoadLim => 1,
2014: lonUserLoadLim => 1,
2015: }
2016: );
2017: if (ref($requested) eq 'HASH') {
2018: foreach my $what (keys(%{$requested})) {
2019: my $response;
2020: my $items = {};
2021: if (exists($packagevars{$what})) {
2022: if (ref($limit_to{$what}) eq 'HASH') {
2023: foreach my $varname (keys(%{$packagevars{$what}})) {
2024: if ($limit_to{$what}{$varname}) {
2025: $items->{$varname} = $packagevars{$what}{$varname};
2026: }
2027: }
2028: } else {
2029: $items = $packagevars{$what};
2030: }
2031: if ($what eq 'perlvar') {
2032: if (!exists($packagevars{$what}{'lonBalancer'})) {
2033: if ($dist =~ /^(centos|rhes|fedora|scientific|oracle)/) {
2034: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
2035: if (ref($othervarref) eq 'HASH') {
2036: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
2037: }
2038: }
2039: }
2040: }
2041: $response = &Apache::lonnet::freeze_escape($items);
2042: }
2043: $result .= &escape($what).'='.$response.'&';
2044: }
2045: }
2046: $result =~ s/\&$//;
2047: &Reply($client,\$result,$userinput);
2048: return 1;
2049: }
2050: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
2051:
2052: sub server_devalidatecache_handler {
2053: my ($cmd,$tail,$client) = @_;
2054: my $userinput = "$cmd:$tail";
2055: my $items = &unescape($tail);
2056: my @cached = split(/\&/,$items);
2057: foreach my $key (@cached) {
2058: if ($key =~ /:/) {
2059: my ($name,$id) = map { &unescape($_); } split(/:/,$key);
2060: &Apache::lonnet::devalidate_cache_new($name,$id);
2061: }
2062: }
2063: my $result = 'ok';
2064: &Reply($client,\$result,$userinput);
2065: return 1;
2066: }
2067: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
2068:
2069: sub server_timezone_handler {
2070: my ($cmd,$tail,$client) = @_;
2071: my $userinput = "$cmd:$tail";
2072: my $timezone;
2073: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
2074: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
2075: if (-e $clockfile) {
2076: if (open(my $fh,"<$clockfile")) {
2077: while (<$fh>) {
2078: next if (/^[\#\s]/);
2079: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
2080: $timezone = $1;
2081: last;
2082: }
2083: }
2084: close($fh);
2085: }
2086: } elsif (-e $tzfile) {
2087: if (open(my $fh,"<$tzfile")) {
2088: $timezone = <$fh>;
2089: close($fh);
2090: chomp($timezone);
2091: if ($timezone =~ m{^Etc/(\w+)$}) {
2092: $timezone = $1;
2093: }
2094: }
2095: }
2096: &Reply($client,\$timezone,$userinput); # This supports debug logging.
2097: return 1;
2098: }
2099: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
2100:
2101: sub server_loncaparev_handler {
2102: my ($cmd,$tail,$client) = @_;
2103: my $userinput = "$cmd:$tail";
2104: &Reply($client,\$perlvar{'lonVersion'},$userinput);
2105: return 1;
2106: }
2107: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
2108:
2109: sub server_homeID_handler {
2110: my ($cmd,$tail,$client) = @_;
2111: my $userinput = "$cmd:$tail";
2112: &Reply($client,\$perlvar{'lonHostID'},$userinput);
2113: return 1;
2114: }
2115: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
2116:
2117: sub server_distarch_handler {
2118: my ($cmd,$tail,$client) = @_;
2119: my $userinput = "$cmd:$tail";
2120: my $reply = &distro_and_arch();
2121: &Reply($client,\$reply,$userinput);
2122: return 1;
2123: }
2124: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
2125:
2126: sub server_certs_handler {
2127: my ($cmd,$tail,$client) = @_;
2128: my $userinput = "$cmd:$tail";
2129: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
2130: my $result = &LONCAPA::Lond::server_certs(\%perlvar,$perlvar{'lonHostID'},$hostname);
2131: &Reply($client,\$result,$userinput);
2132: return;
2133: }
2134: ®ister_handler("servercerts", \&server_certs_handler, 0, 1, 0);
2135:
2136: # Process a reinit request. Reinit requests that either
2137: # lonc or lond be reinitialized so that an updated
2138: # host.tab or domain.tab can be processed.
2139: #
2140: # Parameters:
2141: # $cmd - the actual keyword that invoked us.
2142: # $tail - the tail of the request that invoked us.
2143: # $client - File descriptor connected to the client
2144: # Returns:
2145: # 1 - Ok to continue processing.
2146: # 0 - Program should exit
2147: # Implicit output:
2148: # a reply is sent to the client.
2149: #
2150: sub reinit_process_handler {
2151: my ($cmd, $tail, $client) = @_;
2152:
2153: my $userinput = "$cmd:$tail";
2154:
2155: my $cert = &GetCertificate($userinput);
2156: if(&ValidManager($cert)) {
2157: chomp($userinput);
2158: my $reply = &ReinitProcess($userinput);
2159: &Reply( $client, \$reply, $userinput);
2160: } else {
2161: &Failure( $client, "refused\n", $userinput);
2162: }
2163: return 1;
2164: }
2165: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
2166:
2167: # Process the editing script for a table edit operation.
2168: # the editing operation must be encrypted and requested by
2169: # a manager host.
2170: #
2171: # Parameters:
2172: # $cmd - the actual keyword that invoked us.
2173: # $tail - the tail of the request that invoked us.
2174: # $client - File descriptor connected to the client
2175: # Returns:
2176: # 1 - Ok to continue processing.
2177: # 0 - Program should exit
2178: # Implicit output:
2179: # a reply is sent to the client.
2180: #
2181: sub edit_table_handler {
2182: my ($command, $tail, $client) = @_;
2183:
2184: my $userinput = "$command:$tail";
2185:
2186: my $cert = &GetCertificate($userinput);
2187: if(&ValidManager($cert)) {
2188: my($filetype, $script) = split(/:/, $tail);
2189: if (($filetype eq "hosts") ||
2190: ($filetype eq "domain")) {
2191: if($script ne "") {
2192: &Reply($client, # BUGBUG - EditFile
2193: &EditFile($userinput), # could fail.
2194: $userinput);
2195: } else {
2196: &Failure($client,"refused\n",$userinput);
2197: }
2198: } else {
2199: &Failure($client,"refused\n",$userinput);
2200: }
2201: } else {
2202: &Failure($client,"refused\n",$userinput);
2203: }
2204: return 1;
2205: }
2206: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
2207:
2208: #
2209: # Authenticate a user against the LonCAPA authentication
2210: # database. Note that there are several authentication
2211: # possibilities:
2212: # - unix - The user can be authenticated against the unix
2213: # password file.
2214: # - internal - The user can be authenticated against a purely
2215: # internal per user password file.
2216: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
2217: # ticket granting authority.
2218: # - user - The person tailoring LonCAPA can supply a user authentication
2219: # mechanism that is per system.
2220: #
2221: # Parameters:
2222: # $cmd - The command that got us here.
2223: # $tail - Tail of the command (remaining parameters).
2224: # $client - File descriptor connected to client.
2225: # Returns
2226: # 0 - Requested to exit, caller should shut down.
2227: # 1 - Continue processing.
2228: # Implicit inputs:
2229: # The authentication systems describe above have their own forms of implicit
2230: # input into the authentication process that are described above.
2231: #
2232: sub authenticate_handler {
2233: my ($cmd, $tail, $client) = @_;
2234:
2235:
2236: # Regenerate the full input line
2237:
2238: my $userinput = $cmd.":".$tail;
2239:
2240: # udom - User's domain.
2241: # uname - Username.
2242: # upass - User's password.
2243: # checkdefauth - Pass to validate_user() to try authentication
2244: # with default auth type(s) if no user account.
2245: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
2246: # to check if session can be hosted.
2247:
2248: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
2249: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
2250: chomp($upass);
2251: $upass=&unescape($upass);
2252:
2253: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
2254: if($pwdcorrect) {
2255: my $canhost = 1;
2256: unless ($clientcancheckhost) {
2257: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
2258: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
2259: my @intdoms;
2260: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
2261: if (ref($internet_names) eq 'ARRAY') {
2262: @intdoms = @{$internet_names};
2263: }
2264: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
2265: my ($remote,$hosted);
2266: my $remotesession = &get_usersession_config($udom,'remotesession');
2267: if (ref($remotesession) eq 'HASH') {
2268: $remote = $remotesession->{'remote'};
2269: }
2270: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
2271: if (ref($hostedsession) eq 'HASH') {
2272: $hosted = $hostedsession->{'hosted'};
2273: }
2274: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
2275: $clientversion,
2276: $remote,$hosted);
2277: }
2278: }
2279: if ($canhost) {
2280: &Reply( $client, "authorized\n", $userinput);
2281: } else {
2282: &Reply( $client, "not_allowed_to_host\n", $userinput);
2283: }
2284: #
2285: # Bad credentials: Failed to authorize
2286: #
2287: } else {
2288: &Failure( $client, "non_authorized\n", $userinput);
2289: }
2290:
2291: return 1;
2292: }
2293: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
2294:
2295: #
2296: # Change a user's password. Note that this function is complicated by
2297: # the fact that a user may be authenticated in more than one way:
2298: # At present, we are not able to change the password for all types of
2299: # authentication methods. Only for:
2300: # unix - unix password or shadow passoword style authentication.
2301: # local - Locally written authentication mechanism.
2302: # For now, kerb4 and kerb5 password changes are not supported and result
2303: # in an error.
2304: # FUTURE WORK:
2305: # Support kerberos passwd changes?
2306: # Parameters:
2307: # $cmd - The command that got us here.
2308: # $tail - Tail of the command (remaining parameters).
2309: # $client - File descriptor connected to client.
2310: # Returns
2311: # 0 - Requested to exit, caller should shut down.
2312: # 1 - Continue processing.
2313: # Implicit inputs:
2314: # The authentication systems describe above have their own forms of implicit
2315: # input into the authentication process that are described above.
2316: sub change_password_handler {
2317: my ($cmd, $tail, $client) = @_;
2318:
2319: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
2320:
2321: #
2322: # udom - user's domain.
2323: # uname - Username.
2324: # upass - Current password.
2325: # npass - New password.
2326: # context - Context in which this was called
2327: # (preferences or reset_by_email).
2328: # lonhost - HostID of server where request originated
2329:
2330: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
2331:
2332: $upass=&unescape($upass);
2333: $npass=&unescape($npass);
2334: &Debug("Trying to change password for $uname");
2335:
2336: # First require that the user can be authenticated with their
2337: # old password unless context was 'reset_by_email':
2338:
2339: my ($validated,$failure);
2340: if ($context eq 'reset_by_email') {
2341: if ($lonhost eq '') {
2342: $failure = 'invalid_client';
2343: } else {
2344: $validated = 1;
2345: }
2346: } else {
2347: $validated = &validate_user($udom, $uname, $upass);
2348: }
2349: if($validated) {
2350: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
2351: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2352: my $notunique;
2353: if ($howpwd eq 'internal') {
2354: &Debug("internal auth");
2355: my $ncpass = &hash_passwd($udom,$npass);
2356: my (undef,$method,@rest) = split(/!/,$contentpwd);
2357: if ($method eq 'bcrypt') {
2358: my %passwdconf = &Apache::lonnet::get_passwdconf($udom);
2359: if (($passwdconf{'numsaved'}) && ($passwdconf{'numsaved'} =~ /^\d+$/)) {
2360: my @oldpasswds;
2361: my $userpath = &propath($udom,$uname);
2362: my $fullpath = $userpath.'/oldpasswds';
2363: if (-d $userpath) {
2364: my @oldfiles;
2365: if (-e $fullpath) {
2366: if (opendir(my $dir,$fullpath)) {
2367: (@oldfiles) = grep(/^\d+$/,readdir($dir));
2368: closedir($dir);
2369: }
2370: if (@oldfiles) {
2371: @oldfiles = sort { $b <=> $a } (@oldfiles);
2372: my $numremoved = 0;
2373: for (my $i=0; $i<@oldfiles; $i++) {
2374: if ($i>=$passwdconf{'numsaved'}) {
2375: if (-f "$fullpath/$oldfiles[$i]") {
2376: if (unlink("$fullpath/$oldfiles[$i]")) {
2377: $numremoved ++;
2378: }
2379: }
2380: } elsif (open(my $fh,'<',"$fullpath/$oldfiles[$i]")) {
2381: while (my $line = <$fh>) {
2382: push(@oldpasswds,$line);
2383: }
2384: close($fh);
2385: }
2386: }
2387: if ($numremoved) {
2388: &logthis("unlinked $numremoved old password files for $uname:$udom");
2389: }
2390: }
2391: }
2392: push(@oldpasswds,$contentpwd);
2393: foreach my $item (@oldpasswds) {
2394: my (undef,$method,@rest) = split(/!/,$item);
2395: if ($method eq 'bcrypt') {
2396: my $result = &hash_passwd($udom,$npass,@rest);
2397: if ($result eq $item) {
2398: $notunique = 1;
2399: last;
2400: }
2401: }
2402: }
2403: unless ($notunique) {
2404: unless (-e $fullpath) {
2405: if (&mkpath("$fullpath/")) {
2406: chmod(0700,$fullpath);
2407: }
2408: }
2409: if (-d $fullpath) {
2410: my $now = time;
2411: if (open(my $fh,'>',"$fullpath/$now")) {
2412: print $fh $contentpwd;
2413: close($fh);
2414: chmod(0400,"$fullpath/$now");
2415: }
2416: }
2417: }
2418: }
2419: }
2420: }
2421: if ($notunique) {
2422: my $msg="Result of password change for $uname:$udom - password matches one used before";
2423: if ($lonhost) {
2424: $msg .= " - request originated from: $lonhost";
2425: }
2426: &logthis($msg);
2427: &Reply($client, "prioruse\n", $userinput);
2428: } elsif (&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
2429: my $msg="Result of password change for $uname: pwchange_success";
2430: if ($lonhost) {
2431: $msg .= " - request originated from: $lonhost";
2432: }
2433: &logthis($msg);
2434: &update_passwd_history($uname,$udom,$howpwd,$context);
2435: &Reply($client, "ok\n", $userinput);
2436: } else {
2437: &logthis("Unable to open $uname passwd "
2438: ."to change password");
2439: &Failure( $client, "non_authorized\n",$userinput);
2440: }
2441: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2442: my $result = &change_unix_password($uname, $npass);
2443: if ($result eq 'ok') {
2444: &update_passwd_history($uname,$udom,$howpwd,$context);
2445: }
2446: &logthis("Result of password change for $uname: ".
2447: $result);
2448: &Reply($client, \$result, $userinput);
2449: } else {
2450: # this just means that the current password mode is not
2451: # one we know how to change (e.g the kerberos auth modes or
2452: # locally written auth handler).
2453: #
2454: &Failure( $client, "auth_mode_error\n", $userinput);
2455: }
2456: } else {
2457: if ($failure eq '') {
2458: $failure = 'non_authorized';
2459: }
2460: &Failure( $client, "$failure\n", $userinput);
2461: }
2462:
2463: return 1;
2464: }
2465: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2466:
2467: sub hash_passwd {
2468: my ($domain,$plainpass,@rest) = @_;
2469: my ($salt,$cost);
2470: if (@rest) {
2471: $cost = $rest[0];
2472: # salt is first 22 characters, base-64 encoded by bcrypt
2473: my $plainsalt = substr($rest[1],0,22);
2474: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
2475: } else {
2476: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
2477: my $defaultcost = $domdefaults{'intauth_cost'};
2478: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
2479: $cost = 10;
2480: } else {
2481: $cost = $defaultcost;
2482: }
2483: # Generate random 16-octet base64 salt
2484: $salt = "";
2485: $salt .= pack("C", int rand(256)) for 1..16;
2486: }
2487: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
2488: key_nul => 1,
2489: cost => $cost,
2490: salt => $salt,
2491: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
2492:
2493: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
2494: &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
2495: &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
2496: return $result;
2497: }
2498:
2499: #
2500: # Create a new user. User in this case means a lon-capa user.
2501: # The user must either already exist in some authentication realm
2502: # like kerberos or the /etc/passwd. If not, a user completely local to
2503: # this loncapa system is created.
2504: #
2505: # Parameters:
2506: # $cmd - The command that got us here.
2507: # $tail - Tail of the command (remaining parameters).
2508: # $client - File descriptor connected to client.
2509: # Returns
2510: # 0 - Requested to exit, caller should shut down.
2511: # 1 - Continue processing.
2512: # Implicit inputs:
2513: # The authentication systems describe above have their own forms of implicit
2514: # input into the authentication process that are described above.
2515: sub add_user_handler {
2516:
2517: my ($cmd, $tail, $client) = @_;
2518:
2519:
2520: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2521: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2522:
2523: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2524:
2525:
2526: if($udom eq $currentdomainid) { # Reject new users for other domains...
2527:
2528: my $oldumask=umask(0077);
2529: chomp($npass);
2530: $npass=&unescape($npass);
2531: my $passfilename = &password_path($udom, $uname);
2532: &Debug("Password file created will be:".$passfilename);
2533: if (-e $passfilename) {
2534: &Failure( $client, "already_exists\n", $userinput);
2535: } else {
2536: my $fperror='';
2537: if (!&mkpath($passfilename)) {
2538: $fperror="error: ".($!+0)." mkdir failed while attempting "
2539: ."makeuser";
2540: }
2541: unless ($fperror) {
2542: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2543: $passfilename,'makeuser');
2544: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2545: } else {
2546: &Failure($client, \$fperror, $userinput);
2547: }
2548: }
2549: umask($oldumask);
2550: } else {
2551: &Failure($client, "not_right_domain\n",
2552: $userinput); # Even if we are multihomed.
2553:
2554: }
2555: return 1;
2556:
2557: }
2558: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2559:
2560: #
2561: # Change the authentication method of a user. Note that this may
2562: # also implicitly change the user's password if, for example, the user is
2563: # joining an existing authentication realm. Known authentication realms at
2564: # this time are:
2565: # internal - Purely internal password file (only loncapa knows this user)
2566: # local - Institutionally written authentication module.
2567: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2568: # kerb4 - kerberos version 4
2569: # kerb5 - kerberos version 5
2570: #
2571: # Parameters:
2572: # $cmd - The command that got us here.
2573: # $tail - Tail of the command (remaining parameters).
2574: # $client - File descriptor connected to client.
2575: # Returns
2576: # 0 - Requested to exit, caller should shut down.
2577: # 1 - Continue processing.
2578: # Implicit inputs:
2579: # The authentication systems describe above have their own forms of implicit
2580: # input into the authentication process that are described above.
2581: # NOTE:
2582: # This is also used to change the authentication credential values (e.g. passwd).
2583: #
2584: #
2585: sub change_authentication_handler {
2586:
2587: my ($cmd, $tail, $client) = @_;
2588:
2589: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2590:
2591: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2592: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2593: if ($udom ne $currentdomainid) {
2594: &Failure( $client, "not_right_domain\n", $client);
2595: } else {
2596:
2597: chomp($npass);
2598:
2599: $npass=&unescape($npass);
2600: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2601: my $passfilename = &password_path($udom, $uname);
2602: if ($passfilename) { # Not allowed to create a new user!!
2603: # If just changing the unix passwd. need to arrange to run
2604: # passwd since otherwise make_passwd_file will fail as
2605: # creation of unix authenticated users is no longer supported
2606: # except from the command line, when running make_domain_coordinator.pl
2607:
2608: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2609: my $result = &change_unix_password($uname, $npass);
2610: &logthis("Result of password change for $uname: ".$result);
2611: if ($result eq "ok") {
2612: &update_passwd_history($uname,$udom,$umode,'changeuserauth');
2613: &Reply($client, \$result);
2614: } else {
2615: &Failure($client, \$result);
2616: }
2617: } else {
2618: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2619: $passfilename,'changeuserauth');
2620: #
2621: # If the current auth mode is internal, and the old auth mode was
2622: # unix, or krb*, and the user is an author for this domain,
2623: # re-run manage_permissions for that role in order to be able
2624: # to take ownership of the construction space back to www:www
2625: #
2626:
2627:
2628: &Reply($client, \$result, $userinput);
2629: }
2630:
2631:
2632: } else {
2633: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2634: }
2635: }
2636: return 1;
2637: }
2638: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2639:
2640: sub update_passwd_history {
2641: my ($uname,$udom,$umode,$context) = @_;
2642: my $proname=&propath($udom,$uname);
2643: my $now = time;
2644: if (open(my $fh,">>$proname/passwd.log")) {
2645: print $fh "$now:$umode:$context\n";
2646: close($fh);
2647: }
2648: return;
2649: }
2650:
2651: #
2652: # Determines if this is the home server for a user. The home server
2653: # for a user will have his/her lon-capa passwd file. Therefore all we need
2654: # to do is determine if this file exists.
2655: #
2656: # Parameters:
2657: # $cmd - The command that got us here.
2658: # $tail - Tail of the command (remaining parameters).
2659: # $client - File descriptor connected to client.
2660: # Returns
2661: # 0 - Requested to exit, caller should shut down.
2662: # 1 - Continue processing.
2663: # Implicit inputs:
2664: # The authentication systems describe above have their own forms of implicit
2665: # input into the authentication process that are described above.
2666: #
2667: sub is_home_handler {
2668: my ($cmd, $tail, $client) = @_;
2669:
2670: my $userinput = "$cmd:$tail";
2671:
2672: my ($udom,$uname)=split(/:/,$tail);
2673: chomp($uname);
2674: my $passfile = &password_filename($udom, $uname);
2675: if($passfile) {
2676: &Reply( $client, "found\n", $userinput);
2677: } else {
2678: &Failure($client, "not_found\n", $userinput);
2679: }
2680: return 1;
2681: }
2682: ®ister_handler("home", \&is_home_handler, 0,1,0);
2683:
2684: #
2685: # Process an update request for a resource.
2686: # A resource has been modified that we hold a subscription to.
2687: # If the resource is not local, then we must update, or at least invalidate our
2688: # cached copy of the resource.
2689: # Parameters:
2690: # $cmd - The command that got us here.
2691: # $tail - Tail of the command (remaining parameters).
2692: # $client - File descriptor connected to client.
2693: # Returns
2694: # 0 - Requested to exit, caller should shut down.
2695: # 1 - Continue processing.
2696: # Implicit inputs:
2697: # The authentication systems describe above have their own forms of implicit
2698: # input into the authentication process that are described above.
2699: #
2700: sub update_resource_handler {
2701:
2702: my ($cmd, $tail, $client) = @_;
2703:
2704: my $userinput = "$cmd:$tail";
2705:
2706: my $fname= $tail; # This allows interactive testing
2707:
2708:
2709: my $ownership=ishome($fname);
2710: if ($ownership eq 'not_owner') {
2711: if (-e $fname) {
2712: # Delete preview file, if exists
2713: unlink("$fname.tmp");
2714: # Get usage stats
2715: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2716: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2717: my $now=time;
2718: my $since=$now-$atime;
2719: # If the file has not been used within lonExpire seconds,
2720: # unsubscribe from it and delete local copy
2721: if ($since>$perlvar{'lonExpire'}) {
2722: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2723: &devalidate_meta_cache($fname);
2724: unlink("$fname");
2725: unlink("$fname.meta");
2726: } else {
2727: # Yes, this is in active use. Get a fresh copy. Since it might be in
2728: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2729: my $transname="$fname.in.transfer";
2730: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2731: my $response;
2732: # FIXME: cannot replicate files that take more than two minutes to transfer -- needs checking now 1200s timeout used
2733: # for LWP request.
2734: my $request=new HTTP::Request('GET',"$remoteurl");
2735: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
2736: if ($response->is_error()) {
2737: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2738: &devalidate_meta_cache($fname);
2739: if (-e $transname) {
2740: unlink($transname);
2741: }
2742: unlink($fname);
2743: my $message=$response->status_line;
2744: &logthis("LWP GET: $message for $fname ($remoteurl)");
2745: } else {
2746: if ($remoteurl!~/\.meta$/) {
2747: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2748: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
2749: if ($mresponse->is_error()) {
2750: unlink($fname.'.meta');
2751: }
2752: }
2753: # we successfully transfered, copy file over to real name
2754: rename($transname,$fname);
2755: &devalidate_meta_cache($fname);
2756: }
2757: }
2758: &Reply( $client, "ok\n", $userinput);
2759: } else {
2760: &Failure($client, "not_found\n", $userinput);
2761: }
2762: } else {
2763: &Failure($client, "rejected\n", $userinput);
2764: }
2765: return 1;
2766: }
2767: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2768:
2769: sub devalidate_meta_cache {
2770: my ($url) = @_;
2771: use Cache::Memcached;
2772: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2773: $url = &Apache::lonnet::declutter($url);
2774: $url =~ s-\.meta$--;
2775: my $id = &escape('meta:'.$url);
2776: $memcache->delete($id);
2777: }
2778:
2779: #
2780: # Fetch a user file from a remote server to the user's home directory
2781: # userfiles subdir.
2782: # Parameters:
2783: # $cmd - The command that got us here.
2784: # $tail - Tail of the command (remaining parameters).
2785: # $client - File descriptor connected to client.
2786: # Returns
2787: # 0 - Requested to exit, caller should shut down.
2788: # 1 - Continue processing.
2789: #
2790: sub fetch_user_file_handler {
2791:
2792: my ($cmd, $tail, $client) = @_;
2793:
2794: my $userinput = "$cmd:$tail";
2795: my $fname = $tail;
2796: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2797: my $udir=&propath($udom,$uname).'/userfiles';
2798: unless (-e $udir) {
2799: mkdir($udir,0770);
2800: }
2801: Debug("fetch user file for $fname");
2802: if (-e $udir) {
2803: $ufile=~s/^[\.\~]+//;
2804:
2805: # IF necessary, create the path right down to the file.
2806: # Note that any regular files in the way of this path are
2807: # wiped out to deal with some earlier folly of mine.
2808:
2809: if (!&mkpath($udir.'/'.$ufile)) {
2810: &Failure($client, "unable_to_create\n", $userinput);
2811: }
2812:
2813: my $destname=$udir.'/'.$ufile;
2814: my $transname=$udir.'/'.$ufile.'.in.transit';
2815: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2816: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2817: my $clienthost = &Apache::lonnet::hostname($clientname);
2818: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2819: my $response;
2820: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2821: my $request=new HTTP::Request('GET',"$remoteurl");
2822: my $verifycert = 1;
2823: my @machine_ids = &Apache::lonnet::current_machine_ids();
2824: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
2825: $verifycert = 0;
2826: }
2827: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
2828: if ($response->is_error()) {
2829: unlink($transname);
2830: my $message=$response->status_line;
2831: &logthis("LWP GET: $message for $fname ($remoteurl)");
2832: &Failure($client, "failed\n", $userinput);
2833: } else {
2834: Debug("Renaming $transname to $destname");
2835: if (!rename($transname,$destname)) {
2836: &logthis("Unable to move $transname to $destname");
2837: unlink($transname);
2838: &Failure($client, "failed\n", $userinput);
2839: } else {
2840: if ($fname =~ /^default.+\.(page|sequence)$/) {
2841: my ($major,$minor) = split(/\./,$clientversion);
2842: if (($major < 2) || ($major == 2 && $minor < 11)) {
2843: my $now = time;
2844: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2845: my $key = &escape('internal.contentchange');
2846: my $what = "$key=$now";
2847: my $hashref = &tie_user_hash($udom,$uname,'environment',
2848: &GDBM_WRCREAT(),"P",$what);
2849: if ($hashref) {
2850: $hashref->{$key}=$now;
2851: if (!&untie_user_hash($hashref)) {
2852: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2853: "when updating internal.contentchange");
2854: }
2855: }
2856: }
2857: }
2858: &Reply($client, "ok\n", $userinput);
2859: }
2860: }
2861: } else {
2862: &Failure($client, "not_home\n", $userinput);
2863: }
2864: return 1;
2865: }
2866: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2867:
2868: #
2869: # Remove a file from a user's home directory userfiles subdirectory.
2870: # Parameters:
2871: # cmd - the Lond request keyword that got us here.
2872: # tail - the part of the command past the keyword.
2873: # client- File descriptor connected with the client.
2874: #
2875: # Returns:
2876: # 1 - Continue processing.
2877: sub remove_user_file_handler {
2878: my ($cmd, $tail, $client) = @_;
2879:
2880: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2881:
2882: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2883: if ($ufile =~m|/\.\./|) {
2884: # any files paths with /../ in them refuse
2885: # to deal with
2886: &Failure($client, "refused\n", "$cmd:$tail");
2887: } else {
2888: my $udir = &propath($udom,$uname);
2889: if (-e $udir) {
2890: my $file=$udir.'/userfiles/'.$ufile;
2891: if (-e $file) {
2892: #
2893: # If the file is a regular file unlink is fine...
2894: # However it's possible the client wants a dir
2895: # removed, in which case rmdir is more appropriate.
2896: # Note: rmdir will only remove an empty directory.
2897: #
2898: if (-f $file){
2899: unlink($file);
2900: # for html files remove the associated .bak file
2901: # which may have been created by the editor.
2902: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
2903: my $path = $1;
2904: if (-e $file.'.bak') {
2905: unlink($file.'.bak');
2906: }
2907: }
2908: } elsif(-d $file) {
2909: rmdir($file);
2910: }
2911: if (-e $file) {
2912: # File is still there after we deleted it ?!?
2913:
2914: &Failure($client, "failed\n", "$cmd:$tail");
2915: } else {
2916: &Reply($client, "ok\n", "$cmd:$tail");
2917: }
2918: } else {
2919: &Failure($client, "not_found\n", "$cmd:$tail");
2920: }
2921: } else {
2922: &Failure($client, "not_home\n", "$cmd:$tail");
2923: }
2924: }
2925: return 1;
2926: }
2927: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2928:
2929: #
2930: # make a directory in a user's home directory userfiles subdirectory.
2931: # Parameters:
2932: # cmd - the Lond request keyword that got us here.
2933: # tail - the part of the command past the keyword.
2934: # client- File descriptor connected with the client.
2935: #
2936: # Returns:
2937: # 1 - Continue processing.
2938: sub mkdir_user_file_handler {
2939: my ($cmd, $tail, $client) = @_;
2940:
2941: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2942: $dir=&unescape($dir);
2943: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2944: if ($ufile =~m|/\.\./|) {
2945: # any files paths with /../ in them refuse
2946: # to deal with
2947: &Failure($client, "refused\n", "$cmd:$tail");
2948: } else {
2949: my $udir = &propath($udom,$uname);
2950: if (-e $udir) {
2951: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2952: if (!&mkpath($newdir)) {
2953: &Failure($client, "failed\n", "$cmd:$tail");
2954: }
2955: &Reply($client, "ok\n", "$cmd:$tail");
2956: } else {
2957: &Failure($client, "not_home\n", "$cmd:$tail");
2958: }
2959: }
2960: return 1;
2961: }
2962: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2963:
2964: #
2965: # rename a file in a user's home directory userfiles subdirectory.
2966: # Parameters:
2967: # cmd - the Lond request keyword that got us here.
2968: # tail - the part of the command past the keyword.
2969: # client- File descriptor connected with the client.
2970: #
2971: # Returns:
2972: # 1 - Continue processing.
2973: sub rename_user_file_handler {
2974: my ($cmd, $tail, $client) = @_;
2975:
2976: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2977: $old=&unescape($old);
2978: $new=&unescape($new);
2979: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2980: # any files paths with /../ in them refuse to deal with
2981: &Failure($client, "refused\n", "$cmd:$tail");
2982: } else {
2983: my $udir = &propath($udom,$uname);
2984: if (-e $udir) {
2985: my $oldfile=$udir.'/userfiles/'.$old;
2986: my $newfile=$udir.'/userfiles/'.$new;
2987: if (-e $newfile) {
2988: &Failure($client, "exists\n", "$cmd:$tail");
2989: } elsif (! -e $oldfile) {
2990: &Failure($client, "not_found\n", "$cmd:$tail");
2991: } else {
2992: if (!rename($oldfile,$newfile)) {
2993: &Failure($client, "failed\n", "$cmd:$tail");
2994: } else {
2995: &Reply($client, "ok\n", "$cmd:$tail");
2996: }
2997: }
2998: } else {
2999: &Failure($client, "not_home\n", "$cmd:$tail");
3000: }
3001: }
3002: return 1;
3003: }
3004: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
3005:
3006: #
3007: # Checks if the specified user has an active session on the server
3008: # return ok if so, not_found if not
3009: #
3010: # Parameters:
3011: # cmd - The request keyword that dispatched to tus.
3012: # tail - The tail of the request (colon separated parameters).
3013: # client - Filehandle open on the client.
3014: # Return:
3015: # 1.
3016: sub user_has_session_handler {
3017: my ($cmd, $tail, $client) = @_;
3018:
3019: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
3020:
3021: opendir(DIR,$perlvar{'lonIDsDir'});
3022: my $filename;
3023: while ($filename=readdir(DIR)) {
3024: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
3025: }
3026: if ($filename) {
3027: &Reply($client, "ok\n", "$cmd:$tail");
3028: } else {
3029: &Failure($client, "not_found\n", "$cmd:$tail");
3030: }
3031: return 1;
3032:
3033: }
3034: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
3035:
3036: #
3037: # Authenticate access to a user file by checking that the token the user's
3038: # passed also exists in their session file
3039: #
3040: # Parameters:
3041: # cmd - The request keyword that dispatched to tus.
3042: # tail - The tail of the request (colon separated parameters).
3043: # client - Filehandle open on the client.
3044: # Return:
3045: # 1.
3046: sub token_auth_user_file_handler {
3047: my ($cmd, $tail, $client) = @_;
3048:
3049: my ($fname, $session) = split(/:/, $tail);
3050:
3051: chomp($session);
3052: my $reply="non_auth";
3053: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
3054: if (open(ENVIN,"$file")) {
3055: flock(ENVIN,LOCK_SH);
3056: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
3057: if (exists($disk_env{"userfile.$fname"})) {
3058: $reply="ok";
3059: } else {
3060: foreach my $envname (keys(%disk_env)) {
3061: if ($envname=~ m|^userfile\.\Q$fname\E|) {
3062: $reply="ok";
3063: last;
3064: }
3065: }
3066: }
3067: untie(%disk_env);
3068: close(ENVIN);
3069: &Reply($client, \$reply, "$cmd:$tail");
3070: } else {
3071: &Failure($client, "invalid_token\n", "$cmd:$tail");
3072: }
3073: return 1;
3074:
3075: }
3076: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
3077:
3078: #
3079: # Unsubscribe from a resource.
3080: #
3081: # Parameters:
3082: # $cmd - The command that got us here.
3083: # $tail - Tail of the command (remaining parameters).
3084: # $client - File descriptor connected to client.
3085: # Returns
3086: # 0 - Requested to exit, caller should shut down.
3087: # 1 - Continue processing.
3088: #
3089: sub unsubscribe_handler {
3090: my ($cmd, $tail, $client) = @_;
3091:
3092: my $userinput= "$cmd:$tail";
3093:
3094: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
3095:
3096: &Debug("Unsubscribing $fname");
3097: if (-e $fname) {
3098: &Debug("Exists");
3099: &Reply($client, &unsub($fname,$clientip), $userinput);
3100: } else {
3101: &Failure($client, "not_found\n", $userinput);
3102: }
3103: return 1;
3104: }
3105: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
3106:
3107: # Subscribe to a resource
3108: #
3109: # Parameters:
3110: # $cmd - The command that got us here.
3111: # $tail - Tail of the command (remaining parameters).
3112: # $client - File descriptor connected to client.
3113: # Returns
3114: # 0 - Requested to exit, caller should shut down.
3115: # 1 - Continue processing.
3116: #
3117: sub subscribe_handler {
3118: my ($cmd, $tail, $client)= @_;
3119:
3120: my $userinput = "$cmd:$tail";
3121:
3122: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
3123:
3124: return 1;
3125: }
3126: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
3127:
3128: #
3129: # Determine the latest version of a resource (it looks for the highest
3130: # past version and then returns that +1)
3131: #
3132: # Parameters:
3133: # $cmd - The command that got us here.
3134: # $tail - Tail of the command (remaining parameters).
3135: # (Should consist of an absolute path to a file)
3136: # $client - File descriptor connected to client.
3137: # Returns
3138: # 0 - Requested to exit, caller should shut down.
3139: # 1 - Continue processing.
3140: #
3141: sub current_version_handler {
3142: my ($cmd, $tail, $client) = @_;
3143:
3144: my $userinput= "$cmd:$tail";
3145:
3146: my $fname = $tail;
3147: &Reply( $client, ¤tversion($fname)."\n", $userinput);
3148: return 1;
3149:
3150: }
3151: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
3152:
3153: # Make an entry in a user's activity log.
3154: #
3155: # Parameters:
3156: # $cmd - The command that got us here.
3157: # $tail - Tail of the command (remaining parameters).
3158: # $client - File descriptor connected to client.
3159: # Returns
3160: # 0 - Requested to exit, caller should shut down.
3161: # 1 - Continue processing.
3162: #
3163: sub activity_log_handler {
3164: my ($cmd, $tail, $client) = @_;
3165:
3166:
3167: my $userinput= "$cmd:$tail";
3168:
3169: my ($udom,$uname,$what)=split(/:/,$tail);
3170: chomp($what);
3171: my $proname=&propath($udom,$uname);
3172: my $now=time;
3173: my $hfh;
3174: if ($hfh=IO::File->new(">>$proname/activity.log")) {
3175: print $hfh "$now:$clientname:$what\n";
3176: &Reply( $client, "ok\n", $userinput);
3177: } else {
3178: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
3179: ."while attempting log\n",
3180: $userinput);
3181: }
3182:
3183: return 1;
3184: }
3185: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
3186:
3187: #
3188: # Put a namespace entry in a user profile hash.
3189: # My druthers would be for this to be an encrypted interaction too.
3190: # anything that might be an inadvertent covert channel about either
3191: # user authentication or user personal information....
3192: #
3193: # Parameters:
3194: # $cmd - The command that got us here.
3195: # $tail - Tail of the command (remaining parameters).
3196: # $client - File descriptor connected to client.
3197: # Returns
3198: # 0 - Requested to exit, caller should shut down.
3199: # 1 - Continue processing.
3200: #
3201: sub put_user_profile_entry {
3202: my ($cmd, $tail, $client) = @_;
3203:
3204: my $userinput = "$cmd:$tail";
3205:
3206: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3207: if ($namespace ne 'roles') {
3208: chomp($what);
3209: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3210: &GDBM_WRCREAT(),"P",$what);
3211: if($hashref) {
3212: my @pairs=split(/\&/,$what);
3213: foreach my $pair (@pairs) {
3214: my ($key,$value)=split(/=/,$pair);
3215: $hashref->{$key}=$value;
3216: }
3217: if (&untie_user_hash($hashref)) {
3218: &Reply( $client, "ok\n", $userinput);
3219: } else {
3220: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3221: "while attempting put\n",
3222: $userinput);
3223: }
3224: } else {
3225: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3226: "while attempting put\n", $userinput);
3227: }
3228: } else {
3229: &Failure( $client, "refused\n", $userinput);
3230: }
3231:
3232: return 1;
3233: }
3234: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
3235:
3236: # Put a piece of new data in hash, returns error if entry already exists
3237: # Parameters:
3238: # $cmd - The command that got us here.
3239: # $tail - Tail of the command (remaining parameters).
3240: # $client - File descriptor connected to client.
3241: # Returns
3242: # 0 - Requested to exit, caller should shut down.
3243: # 1 - Continue processing.
3244: #
3245: sub newput_user_profile_entry {
3246: my ($cmd, $tail, $client) = @_;
3247:
3248: my $userinput = "$cmd:$tail";
3249:
3250: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3251: if ($namespace eq 'roles') {
3252: &Failure( $client, "refused\n", $userinput);
3253: return 1;
3254: }
3255:
3256: chomp($what);
3257:
3258: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3259: &GDBM_WRCREAT(),"N",$what);
3260: if(!$hashref) {
3261: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3262: "while attempting put\n", $userinput);
3263: return 1;
3264: }
3265:
3266: my @pairs=split(/\&/,$what);
3267: foreach my $pair (@pairs) {
3268: my ($key,$value)=split(/=/,$pair);
3269: if (exists($hashref->{$key})) {
3270: if (!&untie_user_hash($hashref)) {
3271: &logthis("error: ".($!+0)." untie (GDBM) failed ".
3272: "while attempting newput - early out as key exists");
3273: }
3274: &Failure($client, "key_exists: ".$key."\n",$userinput);
3275: return 1;
3276: }
3277: }
3278:
3279: foreach my $pair (@pairs) {
3280: my ($key,$value)=split(/=/,$pair);
3281: $hashref->{$key}=$value;
3282: }
3283:
3284: if (&untie_user_hash($hashref)) {
3285: &Reply( $client, "ok\n", $userinput);
3286: } else {
3287: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3288: "while attempting put\n",
3289: $userinput);
3290: }
3291: return 1;
3292: }
3293: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
3294:
3295: #
3296: # Increment a profile entry in the user history file.
3297: # The history contains keyword value pairs. In this case,
3298: # The value itself is a pair of numbers. The first, the current value
3299: # the second an increment that this function applies to the current
3300: # value.
3301: #
3302: # Parameters:
3303: # $cmd - The command that got us here.
3304: # $tail - Tail of the command (remaining parameters).
3305: # $client - File descriptor connected to client.
3306: # Returns
3307: # 0 - Requested to exit, caller should shut down.
3308: # 1 - Continue processing.
3309: #
3310: sub increment_user_value_handler {
3311: my ($cmd, $tail, $client) = @_;
3312:
3313: my $userinput = "$cmd:$tail";
3314:
3315: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
3316: if ($namespace ne 'roles') {
3317: chomp($what);
3318: my $hashref = &tie_user_hash($udom, $uname,
3319: $namespace, &GDBM_WRCREAT(),
3320: "P",$what);
3321: if ($hashref) {
3322: my @pairs=split(/\&/,$what);
3323: foreach my $pair (@pairs) {
3324: my ($key,$value)=split(/=/,$pair);
3325: $value = &unescape($value);
3326: # We could check that we have a number...
3327: if (! defined($value) || $value eq '') {
3328: $value = 1;
3329: }
3330: $hashref->{$key}+=$value;
3331: if ($namespace eq 'nohist_resourcetracker') {
3332: if ($hashref->{$key} < 0) {
3333: $hashref->{$key} = 0;
3334: }
3335: }
3336: }
3337: if (&untie_user_hash($hashref)) {
3338: &Reply( $client, "ok\n", $userinput);
3339: } else {
3340: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3341: "while attempting inc\n", $userinput);
3342: }
3343: } else {
3344: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3345: "while attempting inc\n", $userinput);
3346: }
3347: } else {
3348: &Failure($client, "refused\n", $userinput);
3349: }
3350:
3351: return 1;
3352: }
3353: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
3354:
3355: #
3356: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
3357: # Each 'role' a user has implies a set of permissions. Adding a new role
3358: # for a person grants the permissions packaged with that role
3359: # to that user when the role is selected.
3360: #
3361: # Parameters:
3362: # $cmd - The command string (rolesput).
3363: # $tail - The remainder of the request line. For rolesput this
3364: # consists of a colon separated list that contains:
3365: # The domain and user that is granting the role (logged).
3366: # The domain and user that is getting the role.
3367: # The roles being granted as a set of & separated pairs.
3368: # each pair a key value pair.
3369: # $client - File descriptor connected to the client.
3370: # Returns:
3371: # 0 - If the daemon should exit
3372: # 1 - To continue processing.
3373: #
3374: #
3375: sub roles_put_handler {
3376: my ($cmd, $tail, $client) = @_;
3377:
3378: my $userinput = "$cmd:$tail";
3379:
3380: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
3381:
3382:
3383: my $namespace='roles';
3384: chomp($what);
3385: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3386: &GDBM_WRCREAT(), "P",
3387: "$exedom:$exeuser:$what");
3388: #
3389: # Log the attempt to set a role. The {}'s here ensure that the file
3390: # handle is open for the minimal amount of time. Since the flush
3391: # is done on close this improves the chances the log will be an un-
3392: # corrupted ordered thing.
3393: if ($hashref) {
3394: my $pass_entry = &get_auth_type($udom, $uname);
3395: my ($auth_type,$pwd) = split(/:/, $pass_entry);
3396: $auth_type = $auth_type.":";
3397: my @pairs=split(/\&/,$what);
3398: foreach my $pair (@pairs) {
3399: my ($key,$value)=split(/=/,$pair);
3400: &manage_permissions($key, $udom, $uname,
3401: $auth_type);
3402: $hashref->{$key}=$value;
3403: }
3404: if (&untie_user_hash($hashref)) {
3405: &Reply($client, "ok\n", $userinput);
3406: } else {
3407: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3408: "while attempting rolesput\n", $userinput);
3409: }
3410: } else {
3411: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3412: "while attempting rolesput\n", $userinput);
3413: }
3414: return 1;
3415: }
3416: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
3417:
3418: #
3419: # Deletes (removes) a role for a user. This is equivalent to removing
3420: # a permissions package associated with the role from the user's profile.
3421: #
3422: # Parameters:
3423: # $cmd - The command (rolesdel)
3424: # $tail - The remainder of the request line. This consists
3425: # of:
3426: # The domain and user requesting the change (logged)
3427: # The domain and user being changed.
3428: # The roles being revoked. These are shipped to us
3429: # as a bunch of & separated role name keywords.
3430: # $client - The file handle open on the client.
3431: # Returns:
3432: # 1 - Continue processing
3433: # 0 - Exit.
3434: #
3435: sub roles_delete_handler {
3436: my ($cmd, $tail, $client) = @_;
3437:
3438: my $userinput = "$cmd:$tail";
3439:
3440: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
3441: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
3442: "what = ".$what);
3443: my $namespace='roles';
3444: chomp($what);
3445: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3446: &GDBM_WRCREAT(), "D",
3447: "$exedom:$exeuser:$what");
3448:
3449: if ($hashref) {
3450: my @rolekeys=split(/\&/,$what);
3451:
3452: foreach my $key (@rolekeys) {
3453: delete $hashref->{$key};
3454: }
3455: if (&untie_user_hash($hashref)) {
3456: &Reply($client, "ok\n", $userinput);
3457: } else {
3458: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3459: "while attempting rolesdel\n", $userinput);
3460: }
3461: } else {
3462: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3463: "while attempting rolesdel\n", $userinput);
3464: }
3465:
3466: return 1;
3467: }
3468: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
3469:
3470: # Unencrypted get from a user's profile database. See
3471: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
3472: # This function retrieves a keyed item from a specific named database in the
3473: # user's directory.
3474: #
3475: # Parameters:
3476: # $cmd - Command request keyword (get).
3477: # $tail - Tail of the command. This is a colon separated list
3478: # consisting of the domain and username that uniquely
3479: # identifies the profile,
3480: # The 'namespace' which selects the gdbm file to
3481: # do the lookup in,
3482: # & separated list of keys to lookup. Note that
3483: # the values are returned as an & separated list too.
3484: # $client - File descriptor open on the client.
3485: # Returns:
3486: # 1 - Continue processing.
3487: # 0 - Exit.
3488: #
3489: sub get_profile_entry {
3490: my ($cmd, $tail, $client) = @_;
3491:
3492: my $userinput= "$cmd:$tail";
3493:
3494: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3495: chomp($what);
3496:
3497:
3498: my $replystring = read_profile($udom, $uname, $namespace, $what);
3499: my ($first) = split(/:/,$replystring);
3500: if($first ne "error") {
3501: &Reply($client, \$replystring, $userinput);
3502: } else {
3503: &Failure($client, $replystring." while attempting get\n", $userinput);
3504: }
3505: return 1;
3506:
3507:
3508: }
3509: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3510:
3511: #
3512: # Process the encrypted get request. Note that the request is sent
3513: # in clear, but the reply is encrypted. This is a small covert channel:
3514: # information about the sensitive keys is given to the snooper. Just not
3515: # information about the values of the sensitive key. Hmm if I wanted to
3516: # know these I'd snoop for the egets. Get the profile item names from them
3517: # and then issue a get for them since there's no enforcement of the
3518: # requirement of an encrypted get for particular profile items. If I
3519: # were re-doing this, I'd force the request to be encrypted as well as the
3520: # reply. I'd also just enforce encrypted transactions for all gets since
3521: # that would prevent any covert channel snooping.
3522: #
3523: # Parameters:
3524: # $cmd - Command keyword of request (eget).
3525: # $tail - Tail of the command. See GetProfileEntry
3526: # for more information about this.
3527: # $client - File open on the client.
3528: # Returns:
3529: # 1 - Continue processing
3530: # 0 - server should exit.
3531: sub get_profile_entry_encrypted {
3532: my ($cmd, $tail, $client) = @_;
3533:
3534: my $userinput = "$cmd:$tail";
3535:
3536: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3537: chomp($what);
3538: my $qresult = read_profile($udom, $uname, $namespace, $what);
3539: my ($first) = split(/:/, $qresult);
3540: if($first ne "error") {
3541:
3542: if ($cipher) {
3543: my $cmdlength=length($qresult);
3544: $qresult.=" ";
3545: my $encqresult='';
3546: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3547: $encqresult.= unpack("H16",
3548: $cipher->encrypt(substr($qresult,
3549: $encidx,
3550: 8)));
3551: }
3552: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3553: } else {
3554: &Failure( $client, "error:no_key\n", $userinput);
3555: }
3556: } else {
3557: &Failure($client, "$qresult while attempting eget\n", $userinput);
3558:
3559: }
3560:
3561: return 1;
3562: }
3563: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3564:
3565: #
3566: # Deletes a key in a user profile database.
3567: #
3568: # Parameters:
3569: # $cmd - Command keyword (del).
3570: # $tail - Command tail. IN this case a colon
3571: # separated list containing:
3572: # The domain and user that identifies uniquely
3573: # the identity of the user.
3574: # The profile namespace (name of the profile
3575: # database file).
3576: # & separated list of keywords to delete.
3577: # $client - File open on client socket.
3578: # Returns:
3579: # 1 - Continue processing
3580: # 0 - Exit server.
3581: #
3582: #
3583: sub delete_profile_entry {
3584: my ($cmd, $tail, $client) = @_;
3585:
3586: my $userinput = "cmd:$tail";
3587:
3588: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3589: chomp($what);
3590: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3591: &GDBM_WRCREAT(),
3592: "D",$what);
3593: if ($hashref) {
3594: my @keys=split(/\&/,$what);
3595: foreach my $key (@keys) {
3596: delete($hashref->{$key});
3597: }
3598: if (&untie_user_hash($hashref)) {
3599: &Reply($client, "ok\n", $userinput);
3600: } else {
3601: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3602: "while attempting del\n", $userinput);
3603: }
3604: } else {
3605: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3606: "while attempting del\n", $userinput);
3607: }
3608: return 1;
3609: }
3610: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3611:
3612: #
3613: # List the set of keys that are defined in a profile database file.
3614: # A successful reply from this will contain an & separated list of
3615: # the keys.
3616: # Parameters:
3617: # $cmd - Command request (keys).
3618: # $tail - Remainder of the request, a colon separated
3619: # list containing domain/user that identifies the
3620: # user being queried, and the database namespace
3621: # (database filename essentially).
3622: # $client - File open on the client.
3623: # Returns:
3624: # 1 - Continue processing.
3625: # 0 - Exit the server.
3626: #
3627: sub get_profile_keys {
3628: my ($cmd, $tail, $client) = @_;
3629:
3630: my $userinput = "$cmd:$tail";
3631:
3632: my ($udom,$uname,$namespace)=split(/:/,$tail);
3633: my $qresult='';
3634: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3635: &GDBM_READER());
3636: if ($hashref) {
3637: foreach my $key (keys %$hashref) {
3638: $qresult.="$key&";
3639: }
3640: if (&untie_user_hash($hashref)) {
3641: $qresult=~s/\&$//;
3642: &Reply($client, \$qresult, $userinput);
3643: } else {
3644: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3645: "while attempting keys\n", $userinput);
3646: }
3647: } else {
3648: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3649: "while attempting keys\n", $userinput);
3650: }
3651:
3652: return 1;
3653: }
3654: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3655:
3656: #
3657: # Dump the contents of a user profile database.
3658: # Note that this constitutes a very large covert channel too since
3659: # the dump will return sensitive information that is not encrypted.
3660: # The naive security assumption is that the session negotiation ensures
3661: # our client is trusted and I don't believe that's assured at present.
3662: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3663: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3664: #
3665: # Parameters:
3666: # $cmd - The command request keyword (currentdump).
3667: # $tail - Remainder of the request, consisting of a colon
3668: # separated list that has the domain/username and
3669: # the namespace to dump (database file).
3670: # $client - file open on the remote client.
3671: # Returns:
3672: # 1 - Continue processing.
3673: # 0 - Exit the server.
3674: #
3675: sub dump_profile_database {
3676: my ($cmd, $tail, $client) = @_;
3677:
3678: my $res = LONCAPA::Lond::dump_profile_database($tail);
3679:
3680: if ($res =~ /^error:/) {
3681: Failure($client, \$res, "$cmd:$tail");
3682: } else {
3683: Reply($client, \$res, "$cmd:$tail");
3684: }
3685:
3686: return 1;
3687:
3688: #TODO remove
3689: my $userinput = "$cmd:$tail";
3690:
3691: my ($udom,$uname,$namespace) = split(/:/,$tail);
3692: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3693: &GDBM_READER());
3694: if ($hashref) {
3695: # Structure of %data:
3696: # $data{$symb}->{$parameter}=$value;
3697: # $data{$symb}->{'v.'.$parameter}=$version;
3698: # since $parameter will be unescaped, we do not
3699: # have to worry about silly parameter names...
3700:
3701: my $qresult='';
3702: my %data = (); # A hash of anonymous hashes..
3703: while (my ($key,$value) = each(%$hashref)) {
3704: my ($v,$symb,$param) = split(/:/,$key);
3705: next if ($v eq 'version' || $symb eq 'keys');
3706: next if (exists($data{$symb}) &&
3707: exists($data{$symb}->{$param}) &&
3708: $data{$symb}->{'v.'.$param} > $v);
3709: $data{$symb}->{$param}=$value;
3710: $data{$symb}->{'v.'.$param}=$v;
3711: }
3712: if (&untie_user_hash($hashref)) {
3713: while (my ($symb,$param_hash) = each(%data)) {
3714: while(my ($param,$value) = each (%$param_hash)){
3715: next if ($param =~ /^v\./); # Ignore versions...
3716: #
3717: # Just dump the symb=value pairs separated by &
3718: #
3719: $qresult.=$symb.':'.$param.'='.$value.'&';
3720: }
3721: }
3722: chop($qresult);
3723: &Reply($client , \$qresult, $userinput);
3724: } else {
3725: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3726: "while attempting currentdump\n", $userinput);
3727: }
3728: } else {
3729: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3730: "while attempting currentdump\n", $userinput);
3731: }
3732:
3733: return 1;
3734: }
3735: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3736:
3737: #
3738: # Dump a profile database with an optional regular expression
3739: # to match against the keys. In this dump, no effort is made
3740: # to separate symb from version information. Presumably the
3741: # databases that are dumped by this command are of a different
3742: # structure. Need to look at this and improve the documentation of
3743: # both this and the currentdump handler.
3744: # Parameters:
3745: # $cmd - The command keyword.
3746: # $tail - All of the characters after the $cmd:
3747: # These are expected to be a colon
3748: # separated list containing:
3749: # domain/user - identifying the user.
3750: # namespace - identifying the database.
3751: # regexp - optional regular expression
3752: # that is matched against
3753: # database keywords to do
3754: # selective dumps.
3755: # range - optional range of entries
3756: # e.g., 10-20 would return the
3757: # 10th to 19th items, etc.
3758: # $client - Channel open on the client.
3759: # Returns:
3760: # 1 - Continue processing.
3761: # Side effects:
3762: # response is written to $client.
3763: #
3764: sub dump_with_regexp {
3765: my ($cmd, $tail, $client) = @_;
3766:
3767: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3768:
3769: if ($res =~ /^error:/) {
3770: Failure($client, \$res, "$cmd:$tail");
3771: } else {
3772: Reply($client, \$res, "$cmd:$tail");
3773: }
3774:
3775: return 1;
3776: }
3777: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3778:
3779: # Store a set of key=value pairs associated with a versioned name.
3780: #
3781: # Parameters:
3782: # $cmd - Request command keyword.
3783: # $tail - Tail of the request. This is a colon
3784: # separated list containing:
3785: # domain/user - User and authentication domain.
3786: # namespace - Name of the database being modified
3787: # rid - Resource keyword to modify.
3788: # what - new value associated with rid.
3789: # laststore - (optional) version=timestamp
3790: # for most recent transaction for rid
3791: # in namespace, when cstore was called
3792: #
3793: # $client - Socket open on the client.
3794: #
3795: #
3796: # Returns:
3797: # 1 (keep on processing).
3798: # Side-Effects:
3799: # Writes to the client
3800: # Successful storage will cause either 'ok', or, if $laststore was included
3801: # in the tail of the request, and the version number for the last transaction
3802: # is larger than the version in $laststore, delay:$numtrans , where $numtrans
3803: # is the number of store evevnts recorded for rid in namespace since
3804: # lonnet::store() was called by the client.
3805: #
3806: sub store_handler {
3807: my ($cmd, $tail, $client) = @_;
3808:
3809: my $userinput = "$cmd:$tail";
3810: chomp($tail);
3811: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
3812: if ($namespace ne 'roles') {
3813:
3814: my @pairs=split(/\&/,$what);
3815: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3816: &GDBM_WRCREAT(), "S",
3817: "$rid:$what");
3818: if ($hashref) {
3819: my $now = time;
3820: my $numtrans;
3821: if ($laststore) {
3822: my ($previousversion,$previoustime) = split(/\=/,$laststore);
3823: my ($lastversion,$lasttime) = (0,0);
3824: $lastversion = $hashref->{"version:$rid"};
3825: if ($lastversion) {
3826: $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
3827: }
3828: if (($previousversion) && ($previousversion !~ /\D/)) {
3829: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
3830: $numtrans = $lastversion - $previousversion;
3831: }
3832: } elsif ($lastversion) {
3833: $numtrans = $lastversion;
3834: }
3835: if ($numtrans) {
3836: $numtrans =~ s/D//g;
3837: }
3838: }
3839: $hashref->{"version:$rid"}++;
3840: my $version=$hashref->{"version:$rid"};
3841: my $allkeys='';
3842: foreach my $pair (@pairs) {
3843: my ($key,$value)=split(/=/,$pair);
3844: $allkeys.=$key.':';
3845: $hashref->{"$version:$rid:$key"}=$value;
3846: }
3847: $hashref->{"$version:$rid:timestamp"}=$now;
3848: $allkeys.='timestamp';
3849: $hashref->{"$version:keys:$rid"}=$allkeys;
3850: if (&untie_user_hash($hashref)) {
3851: my $msg = 'ok';
3852: if ($numtrans) {
3853: $msg = 'delay:'.$numtrans;
3854: }
3855: &Reply($client, "$msg\n", $userinput);
3856: } else {
3857: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3858: "while attempting store\n", $userinput);
3859: }
3860: } else {
3861: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3862: "while attempting store\n", $userinput);
3863: }
3864: } else {
3865: &Failure($client, "refused\n", $userinput);
3866: }
3867:
3868: return 1;
3869: }
3870: ®ister_handler("store", \&store_handler, 0, 1, 0);
3871:
3872: # Modify a set of key=value pairs associated with a versioned name.
3873: #
3874: # Parameters:
3875: # $cmd - Request command keyword.
3876: # $tail - Tail of the request. This is a colon
3877: # separated list containing:
3878: # domain/user - User and authentication domain.
3879: # namespace - Name of the database being modified
3880: # rid - Resource keyword to modify.
3881: # v - Version item to modify
3882: # what - new value associated with rid.
3883: #
3884: # $client - Socket open on the client.
3885: #
3886: #
3887: # Returns:
3888: # 1 (keep on processing).
3889: # Side-Effects:
3890: # Writes to the client
3891: sub putstore_handler {
3892: my ($cmd, $tail, $client) = @_;
3893:
3894: my $userinput = "$cmd:$tail";
3895:
3896: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3897: if ($namespace ne 'roles') {
3898:
3899: chomp($what);
3900: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3901: &GDBM_WRCREAT(), "M",
3902: "$rid:$v:$what");
3903: if ($hashref) {
3904: my $now = time;
3905: my %data = &hash_extract($what);
3906: my @allkeys;
3907: while (my($key,$value) = each(%data)) {
3908: push(@allkeys,$key);
3909: $hashref->{"$v:$rid:$key"} = $value;
3910: }
3911: my $allkeys = join(':',@allkeys);
3912: $hashref->{"$v:keys:$rid"}=$allkeys;
3913:
3914: if (&untie_user_hash($hashref)) {
3915: &Reply($client, "ok\n", $userinput);
3916: } else {
3917: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3918: "while attempting store\n", $userinput);
3919: }
3920: } else {
3921: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3922: "while attempting store\n", $userinput);
3923: }
3924: } else {
3925: &Failure($client, "refused\n", $userinput);
3926: }
3927:
3928: return 1;
3929: }
3930: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3931:
3932: sub hash_extract {
3933: my ($str)=@_;
3934: my %hash;
3935: foreach my $pair (split(/\&/,$str)) {
3936: my ($key,$value)=split(/=/,$pair);
3937: $hash{$key}=$value;
3938: }
3939: return (%hash);
3940: }
3941: sub hash_to_str {
3942: my ($hash_ref)=@_;
3943: my $str;
3944: foreach my $key (keys(%$hash_ref)) {
3945: $str.=$key.'='.$hash_ref->{$key}.'&';
3946: }
3947: $str=~s/\&$//;
3948: return $str;
3949: }
3950:
3951: #
3952: # Dump out all versions of a resource that has key=value pairs associated
3953: # with it for each version. These resources are built up via the store
3954: # command.
3955: #
3956: # Parameters:
3957: # $cmd - Command keyword.
3958: # $tail - Remainder of the request which consists of:
3959: # domain/user - User and auth. domain.
3960: # namespace - name of resource database.
3961: # rid - Resource id.
3962: # $client - socket open on the client.
3963: #
3964: # Returns:
3965: # 1 indicating the caller should not yet exit.
3966: # Side-effects:
3967: # Writes a reply to the client.
3968: # The reply is a string of the following shape:
3969: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3970: # Where the 1 above represents version 1.
3971: # this continues for all pairs of keys in all versions.
3972: #
3973: #
3974: #
3975: #
3976: sub restore_handler {
3977: my ($cmd, $tail, $client) = @_;
3978:
3979: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3980: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3981: $namespace=~s/\//\_/g;
3982: $namespace = &LONCAPA::clean_username($namespace);
3983:
3984: chomp($rid);
3985: my $qresult='';
3986: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3987: if ($hashref) {
3988: my $version=$hashref->{"version:$rid"};
3989: $qresult.="version=$version&";
3990: my $scope;
3991: for ($scope=1;$scope<=$version;$scope++) {
3992: my $vkeys=$hashref->{"$scope:keys:$rid"};
3993: my @keys=split(/:/,$vkeys);
3994: my $key;
3995: $qresult.="$scope:keys=$vkeys&";
3996: foreach $key (@keys) {
3997: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3998: }
3999: }
4000: if (&untie_user_hash($hashref)) {
4001: $qresult=~s/\&$//;
4002: &Reply( $client, \$qresult, $userinput);
4003: } else {
4004: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4005: "while attempting restore\n", $userinput);
4006: }
4007: } else {
4008: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4009: "while attempting restore\n", $userinput);
4010: }
4011:
4012: return 1;
4013:
4014:
4015: }
4016: ®ister_handler("restore", \&restore_handler, 0,1,0);
4017:
4018: #
4019: # Add a chat message to a synchronous discussion board.
4020: #
4021: # Parameters:
4022: # $cmd - Request keyword.
4023: # $tail - Tail of the command. A colon separated list
4024: # containing:
4025: # cdom - Domain on which the chat board lives
4026: # cnum - Course containing the chat board.
4027: # newpost - Body of the posting.
4028: # group - Optional group, if chat board is only
4029: # accessible in a group within the course
4030: # $client - Socket open on the client.
4031: # Returns:
4032: # 1 - Indicating caller should keep on processing.
4033: #
4034: # Side-effects:
4035: # writes a reply to the client.
4036: #
4037: #
4038: sub send_chat_handler {
4039: my ($cmd, $tail, $client) = @_;
4040:
4041:
4042: my $userinput = "$cmd:$tail";
4043:
4044: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
4045: &chat_add($cdom,$cnum,$newpost,$group);
4046: &Reply($client, "ok\n", $userinput);
4047:
4048: return 1;
4049: }
4050: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
4051:
4052: #
4053: # Retrieve the set of chat messages from a discussion board.
4054: #
4055: # Parameters:
4056: # $cmd - Command keyword that initiated the request.
4057: # $tail - Remainder of the request after the command
4058: # keyword. In this case a colon separated list of
4059: # chat domain - Which discussion board.
4060: # chat id - Discussion thread(?)
4061: # domain/user - Authentication domain and username
4062: # of the requesting person.
4063: # group - Optional course group containing
4064: # the board.
4065: # $client - Socket open on the client program.
4066: # Returns:
4067: # 1 - continue processing
4068: # Side effects:
4069: # Response is written to the client.
4070: #
4071: sub retrieve_chat_handler {
4072: my ($cmd, $tail, $client) = @_;
4073:
4074:
4075: my $userinput = "$cmd:$tail";
4076:
4077: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
4078: my $reply='';
4079: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
4080: $reply.=&escape($_).':';
4081: }
4082: $reply=~s/\:$//;
4083: &Reply($client, \$reply, $userinput);
4084:
4085:
4086: return 1;
4087: }
4088: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
4089:
4090: #
4091: # Initiate a query of an sql database. SQL query repsonses get put in
4092: # a file for later retrieval. This prevents sql query results from
4093: # bottlenecking the system. Note that with loncnew, perhaps this is
4094: # less of an issue since multiple outstanding requests can be concurrently
4095: # serviced.
4096: #
4097: # Parameters:
4098: # $cmd - Command keyword that initiated the request.
4099: # $tail - Remainder of the command after the keyword.
4100: # For this function, this consists of a query and
4101: # 3 arguments that are self-documentingly labelled
4102: # in the original arg1, arg2, arg3.
4103: # $client - Socket open on the client.
4104: # Return:
4105: # 1 - Indicating processing should continue.
4106: # Side-effects:
4107: # a reply is written to $client.
4108: #
4109: sub send_query_handler {
4110: my ($cmd, $tail, $client) = @_;
4111:
4112: my $userinput = "$cmd:$tail";
4113:
4114: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
4115: $query=~s/\n*$//g;
4116: if (($query eq 'usersearch') || ($query eq 'instdirsearch')) {
4117: my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch');
4118: my $earlyout;
4119: if (ref($usersearchconf) eq 'HASH') {
4120: if ($currentdomainid eq $clienthomedom) {
4121: if ($query eq 'usersearch') {
4122: if ($usersearchconf->{'lcavailable'} eq '0') {
4123: $earlyout = 1;
4124: }
4125: } else {
4126: if ($usersearchconf->{'available'} eq '0') {
4127: $earlyout = 1;
4128: }
4129: }
4130: } else {
4131: if ($query eq 'usersearch') {
4132: if ($usersearchconf->{'lclocalonly'}) {
4133: $earlyout = 1;
4134: }
4135: } else {
4136: if ($usersearchconf->{'localonly'}) {
4137: $earlyout = 1;
4138: }
4139: }
4140: }
4141: }
4142: if ($earlyout) {
4143: &Reply($client, "query_not_authorized\n");
4144: return 1;
4145: }
4146: }
4147: &Reply($client, "". &sql_reply("$clientname\&$query".
4148: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
4149: $userinput);
4150:
4151: return 1;
4152: }
4153: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
4154:
4155: #
4156: # Add a reply to an sql query. SQL queries are done asyncrhonously.
4157: # The query is submitted via a "querysend" transaction.
4158: # There it is passed on to the lonsql daemon, queued and issued to
4159: # mysql.
4160: # This transaction is invoked when the sql transaction is complete
4161: # it stores the query results in flie and indicates query completion.
4162: # presumably local software then fetches this response... I'm guessing
4163: # the sequence is: lonc does a querysend, we ask lonsql to do it.
4164: # lonsql on completion of the query interacts with the lond of our
4165: # client to do a query reply storing two files:
4166: # - id - The results of the query.
4167: # - id.end - Indicating the transaction completed.
4168: # NOTE: id is a unique id assigned to the query and querysend time.
4169: # Parameters:
4170: # $cmd - Command keyword that initiated this request.
4171: # $tail - Remainder of the tail. In this case that's a colon
4172: # separated list containing the query Id and the
4173: # results of the query.
4174: # $client - Socket open on the client.
4175: # Return:
4176: # 1 - Indicating that we should continue processing.
4177: # Side effects:
4178: # ok written to the client.
4179: #
4180: sub reply_query_handler {
4181: my ($cmd, $tail, $client) = @_;
4182:
4183:
4184: my $userinput = "$cmd:$tail";
4185:
4186: my ($id,$reply)=split(/:/,$tail);
4187: my $store;
4188: my $execdir=$perlvar{'lonDaemons'};
4189: if ($store=IO::File->new(">$execdir/tmp/$id")) {
4190: $reply=~s/\&/\n/g;
4191: print $store $reply;
4192: close $store;
4193: my $store2=IO::File->new(">$execdir/tmp/$id.end");
4194: print $store2 "done\n";
4195: close $store2;
4196: &Reply($client, "ok\n", $userinput);
4197: } else {
4198: &Failure($client, "error: ".($!+0)
4199: ." IO::File->new Failed ".
4200: "while attempting queryreply\n", $userinput);
4201: }
4202:
4203:
4204: return 1;
4205: }
4206: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
4207:
4208: #
4209: # Process the courseidput request. Not quite sure what this means
4210: # at the system level sense. It appears a gdbm file in the
4211: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
4212: # a set of entries made in that database.
4213: #
4214: # Parameters:
4215: # $cmd - The command keyword that initiated this request.
4216: # $tail - Tail of the command. In this case consists of a colon
4217: # separated list contaning the domain to apply this to and
4218: # an ampersand separated list of keyword=value pairs.
4219: # Each value is a colon separated list that includes:
4220: # description, institutional code and course owner.
4221: # For backward compatibility with versions included
4222: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
4223: # code and/or course owner are preserved from the existing
4224: # record when writing a new record in response to 1.1 or
4225: # 1.2 implementations of lonnet::flushcourselogs().
4226: #
4227: # $client - Socket open on the client.
4228: # Returns:
4229: # 1 - indicating that processing should continue
4230: #
4231: # Side effects:
4232: # reply is written to the client.
4233: #
4234: sub put_course_id_handler {
4235: my ($cmd, $tail, $client) = @_;
4236:
4237:
4238: my $userinput = "$cmd:$tail";
4239:
4240: my ($udom, $what) = split(/:/, $tail,2);
4241: chomp($what);
4242: my $now=time;
4243: my @pairs=split(/\&/,$what);
4244:
4245: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4246: if ($hashref) {
4247: foreach my $pair (@pairs) {
4248: my ($key,$courseinfo) = split(/=/,$pair,2);
4249: $courseinfo =~ s/=/:/g;
4250: if (defined($hashref->{$key})) {
4251: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
4252: if (ref($value) eq 'HASH') {
4253: my @items = ('description','inst_code','owner','type');
4254: my @new_items = split(/:/,$courseinfo,-1);
4255: my %storehash;
4256: for (my $i=0; $i<@new_items; $i++) {
4257: $storehash{$items[$i]} = &unescape($new_items[$i]);
4258: }
4259: $hashref->{$key} =
4260: &Apache::lonnet::freeze_escape(\%storehash);
4261: my $unesc_key = &unescape($key);
4262: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4263: next;
4264: }
4265: }
4266: my @current_items = split(/:/,$hashref->{$key},-1);
4267: shift(@current_items); # remove description
4268: pop(@current_items); # remove last access
4269: my $numcurrent = scalar(@current_items);
4270: if ($numcurrent > 3) {
4271: $numcurrent = 3;
4272: }
4273: my @new_items = split(/:/,$courseinfo,-1);
4274: my $numnew = scalar(@new_items);
4275: if ($numcurrent > 0) {
4276: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
4277: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
4278: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
4279: }
4280: }
4281: }
4282: $hashref->{$key}=$courseinfo.':'.$now;
4283: }
4284: if (&untie_domain_hash($hashref)) {
4285: &Reply( $client, "ok\n", $userinput);
4286: } else {
4287: &Failure($client, "error: ".($!+0)
4288: ." untie(GDBM) Failed ".
4289: "while attempting courseidput\n", $userinput);
4290: }
4291: } else {
4292: &Failure($client, "error: ".($!+0)
4293: ." tie(GDBM) Failed ".
4294: "while attempting courseidput\n", $userinput);
4295: }
4296:
4297: return 1;
4298: }
4299: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
4300:
4301: sub put_course_id_hash_handler {
4302: my ($cmd, $tail, $client) = @_;
4303: my $userinput = "$cmd:$tail";
4304: my ($udom,$mode,$what) = split(/:/, $tail,3);
4305: chomp($what);
4306: my $now=time;
4307: my @pairs=split(/\&/,$what);
4308: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4309: if ($hashref) {
4310: foreach my $pair (@pairs) {
4311: my ($key,$value)=split(/=/,$pair);
4312: my $unesc_key = &unescape($key);
4313: if ($mode ne 'timeonly') {
4314: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
4315: my $curritems = &Apache::lonnet::thaw_unescape($key);
4316: if (ref($curritems) ne 'HASH') {
4317: my @current_items = split(/:/,$hashref->{$key},-1);
4318: my $lasttime = pop(@current_items);
4319: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
4320: } else {
4321: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
4322: }
4323: }
4324: $hashref->{$key} = $value;
4325: }
4326: if ($mode ne 'notime') {
4327: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4328: }
4329: }
4330: if (&untie_domain_hash($hashref)) {
4331: &Reply($client, "ok\n", $userinput);
4332: } else {
4333: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4334: "while attempting courseidputhash\n", $userinput);
4335: }
4336: } else {
4337: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4338: "while attempting courseidputhash\n", $userinput);
4339: }
4340: return 1;
4341: }
4342: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
4343:
4344: # Retrieves the value of a course id resource keyword pattern
4345: # defined since a starting date. Both the starting date and the
4346: # keyword pattern are optional. If the starting date is not supplied it
4347: # is treated as the beginning of time. If the pattern is not found,
4348: # it is treatred as "." matching everything.
4349: #
4350: # Parameters:
4351: # $cmd - Command keyword that resulted in us being dispatched.
4352: # $tail - The remainder of the command that, in this case, consists
4353: # of a colon separated list of:
4354: # domain - The domain in which the course database is
4355: # defined.
4356: # since - Optional parameter describing the minimum
4357: # time of definition(?) of the resources that
4358: # will match the dump.
4359: # description - regular expression that is used to filter
4360: # the dump. Only keywords matching this regexp
4361: # will be used.
4362: # institutional code - optional supplied code to filter
4363: # the dump. Only courses with an institutional code
4364: # that match the supplied code will be returned.
4365: # owner - optional supplied username and domain of owner to
4366: # filter the dump. Only courses for which the course
4367: # owner matches the supplied username and/or domain
4368: # will be returned. Pre-2.2.0 legacy entries from
4369: # nohist_courseiddump will only contain usernames.
4370: # type - optional parameter for selection
4371: # regexp_ok - if 1 or -1 allow the supplied institutional code
4372: # filter to behave as a regular expression:
4373: # 1 will not exclude the course if the instcode matches the RE
4374: # -1 will exclude the course if the instcode matches the RE
4375: # rtn_as_hash - whether to return the information available for
4376: # each matched item as a frozen hash of all
4377: # key, value pairs in the item's hash, or as a
4378: # colon-separated list of (in order) description,
4379: # institutional code, and course owner.
4380: # selfenrollonly - filter by courses allowing self-enrollment
4381: # now or in the future (selfenrollonly = 1).
4382: # catfilter - filter by course category, assigned to a course
4383: # using manually defined categories (i.e., not
4384: # self-cataloging based on on institutional code).
4385: # showhidden - include course in results even if course
4386: # was set to be excluded from course catalog (DC only).
4387: # caller - if set to 'coursecatalog', courses set to be hidden
4388: # from course catalog will be excluded from results (unless
4389: # overridden by "showhidden".
4390: # cloner - escaped username:domain of course cloner (if picking course to
4391: # clone).
4392: # cc_clone_list - escaped comma separated list of courses for which
4393: # course cloner has active CC role (and so can clone
4394: # automatically).
4395: # cloneonly - filter by courses for which cloner has rights to clone.
4396: # createdbefore - include courses for which creation date preceeded this date.
4397: # createdafter - include courses for which creation date followed this date.
4398: # creationcontext - include courses created in specified context
4399: #
4400: # domcloner - flag to indicate if user can create CCs in course's domain.
4401: # If so, ability to clone course is automatic.
4402: # hasuniquecode - filter by courses for which a six character unique code has
4403: # been set.
4404: #
4405: # $client - The socket open on the client.
4406: # Returns:
4407: # 1 - Continue processing.
4408: # Side Effects:
4409: # a reply is written to $client.
4410: sub dump_course_id_handler {
4411: my ($cmd, $tail, $client) = @_;
4412:
4413: my $res = LONCAPA::Lond::dump_course_id_handler($tail);
4414: if ($res =~ /^error:/) {
4415: Failure($client, \$res, "$cmd:$tail");
4416: } else {
4417: Reply($client, \$res, "$cmd:$tail");
4418: }
4419:
4420: return 1;
4421:
4422: #TODO remove
4423: my $userinput = "$cmd:$tail";
4424:
4425: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
4426: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
4427: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
4428: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
4429: my $now = time;
4430: my ($cloneruname,$clonerudom,%cc_clone);
4431: if (defined($description)) {
4432: $description=&unescape($description);
4433: } else {
4434: $description='.';
4435: }
4436: if (defined($instcodefilter)) {
4437: $instcodefilter=&unescape($instcodefilter);
4438: } else {
4439: $instcodefilter='.';
4440: }
4441: my ($ownerunamefilter,$ownerdomfilter);
4442: if (defined($ownerfilter)) {
4443: $ownerfilter=&unescape($ownerfilter);
4444: if ($ownerfilter ne '.' && defined($ownerfilter)) {
4445: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
4446: $ownerunamefilter = $1;
4447: $ownerdomfilter = $2;
4448: } else {
4449: $ownerunamefilter = $ownerfilter;
4450: $ownerdomfilter = '';
4451: }
4452: }
4453: } else {
4454: $ownerfilter='.';
4455: }
4456:
4457: if (defined($coursefilter)) {
4458: $coursefilter=&unescape($coursefilter);
4459: } else {
4460: $coursefilter='.';
4461: }
4462: if (defined($typefilter)) {
4463: $typefilter=&unescape($typefilter);
4464: } else {
4465: $typefilter='.';
4466: }
4467: if (defined($regexp_ok)) {
4468: $regexp_ok=&unescape($regexp_ok);
4469: }
4470: if (defined($catfilter)) {
4471: $catfilter=&unescape($catfilter);
4472: }
4473: if (defined($cloner)) {
4474: $cloner = &unescape($cloner);
4475: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4476: }
4477: if (defined($cc_clone_list)) {
4478: $cc_clone_list = &unescape($cc_clone_list);
4479: my @cc_cloners = split('&',$cc_clone_list);
4480: foreach my $cid (@cc_cloners) {
4481: my ($clonedom,$clonenum) = split(':',$cid);
4482: next if ($clonedom ne $udom);
4483: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4484: }
4485: }
4486: if ($createdbefore ne '') {
4487: $createdbefore = &unescape($createdbefore);
4488: } else {
4489: $createdbefore = 0;
4490: }
4491: if ($createdafter ne '') {
4492: $createdafter = &unescape($createdafter);
4493: } else {
4494: $createdafter = 0;
4495: }
4496: if ($creationcontext ne '') {
4497: $creationcontext = &unescape($creationcontext);
4498: } else {
4499: $creationcontext = '.';
4500: }
4501: unless ($hasuniquecode) {
4502: $hasuniquecode = '.';
4503: }
4504: my $unpack = 1;
4505: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
4506: $typefilter eq '.') {
4507: $unpack = 0;
4508: }
4509: if (!defined($since)) { $since=0; }
4510: my $qresult='';
4511: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4512: if ($hashref) {
4513: while (my ($key,$value) = each(%$hashref)) {
4514: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
4515: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4516: $context);
4517: $unesc_key = &unescape($key);
4518: if ($unesc_key =~ /^lasttime:/) {
4519: next;
4520: } else {
4521: $lasttime_key = &escape('lasttime:'.$unesc_key);
4522: }
4523: if ($hashref->{$lasttime_key} ne '') {
4524: $lasttime = $hashref->{$lasttime_key};
4525: next if ($lasttime<$since);
4526: }
4527: my ($canclone,$valchange);
4528: my $items = &Apache::lonnet::thaw_unescape($value);
4529: if (ref($items) eq 'HASH') {
4530: if ($hashref->{$lasttime_key} eq '') {
4531: next if ($since > 1);
4532: }
4533: $is_hash = 1;
4534: if ($domcloner) {
4535: $canclone = 1;
4536: } elsif (defined($clonerudom)) {
4537: if ($items->{'cloners'}) {
4538: my @cloneable = split(',',$items->{'cloners'});
4539: if (@cloneable) {
4540: if (grep(/^\*$/,@cloneable)) {
4541: $canclone = 1;
4542: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4543: $canclone = 1;
4544: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4545: $canclone = 1;
4546: }
4547: }
4548: unless ($canclone) {
4549: if ($cloneruname ne '' && $clonerudom ne '') {
4550: if ($cc_clone{$unesc_key}) {
4551: $canclone = 1;
4552: $items->{'cloners'} .= ','.$cloneruname.':'.
4553: $clonerudom;
4554: $valchange = 1;
4555: }
4556: }
4557: }
4558: } elsif (defined($cloneruname)) {
4559: if ($cc_clone{$unesc_key}) {
4560: $canclone = 1;
4561: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4562: $valchange = 1;
4563: }
4564: unless ($canclone) {
4565: if ($items->{'owner'} =~ /:/) {
4566: if ($items->{'owner'} eq $cloner) {
4567: $canclone = 1;
4568: }
4569: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4570: $canclone = 1;
4571: }
4572: if ($canclone) {
4573: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4574: $valchange = 1;
4575: }
4576: }
4577: }
4578: }
4579: if ($unpack || !$rtn_as_hash) {
4580: $unesc_val{'descr'} = $items->{'description'};
4581: $unesc_val{'inst_code'} = $items->{'inst_code'};
4582: $unesc_val{'owner'} = $items->{'owner'};
4583: $unesc_val{'type'} = $items->{'type'};
4584: $unesc_val{'cloners'} = $items->{'cloners'};
4585: $unesc_val{'created'} = $items->{'created'};
4586: $unesc_val{'context'} = $items->{'context'};
4587: }
4588: $selfenroll_types = $items->{'selfenroll_types'};
4589: $selfenroll_end = $items->{'selfenroll_end_date'};
4590: $created = $items->{'created'};
4591: $context = $items->{'context'};
4592: if ($hasuniquecode ne '.') {
4593: next unless ($items->{'uniquecode'});
4594: }
4595: if ($selfenrollonly) {
4596: next if (!$selfenroll_types);
4597: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4598: next;
4599: }
4600: }
4601: if ($creationcontext ne '.') {
4602: next if (($context ne '') && ($context ne $creationcontext));
4603: }
4604: if ($createdbefore > 0) {
4605: next if (($created eq '') || ($created > $createdbefore));
4606: }
4607: if ($createdafter > 0) {
4608: next if (($created eq '') || ($created <= $createdafter));
4609: }
4610: if ($catfilter ne '') {
4611: next if ($items->{'categories'} eq '');
4612: my @categories = split('&',$items->{'categories'});
4613: next if (@categories == 0);
4614: my @subcats = split('&',$catfilter);
4615: my $matchcat = 0;
4616: foreach my $cat (@categories) {
4617: if (grep(/^\Q$cat\E$/,@subcats)) {
4618: $matchcat = 1;
4619: last;
4620: }
4621: }
4622: next if (!$matchcat);
4623: }
4624: if ($caller eq 'coursecatalog') {
4625: if ($items->{'hidefromcat'} eq 'yes') {
4626: next if !$showhidden;
4627: }
4628: }
4629: } else {
4630: next if ($catfilter ne '');
4631: next if ($selfenrollonly);
4632: next if ($createdbefore || $createdafter);
4633: next if ($creationcontext ne '.');
4634: if ((defined($clonerudom)) && (defined($cloneruname))) {
4635: if ($cc_clone{$unesc_key}) {
4636: $canclone = 1;
4637: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4638: }
4639: }
4640: $is_hash = 0;
4641: my @courseitems = split(/:/,$value);
4642: $lasttime = pop(@courseitems);
4643: if ($hashref->{$lasttime_key} eq '') {
4644: next if ($lasttime<$since);
4645: }
4646: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4647: }
4648: if ($cloneonly) {
4649: next unless ($canclone);
4650: }
4651: my $match = 1;
4652: if ($description ne '.') {
4653: if (!$is_hash) {
4654: $unesc_val{'descr'} = &unescape($val{'descr'});
4655: }
4656: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4657: $match = 0;
4658: }
4659: }
4660: if ($instcodefilter ne '.') {
4661: if (!$is_hash) {
4662: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4663: }
4664: if ($regexp_ok == 1) {
4665: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4666: $match = 0;
4667: }
4668: } elsif ($regexp_ok == -1) {
4669: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4670: $match = 0;
4671: }
4672: } else {
4673: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4674: $match = 0;
4675: }
4676: }
4677: }
4678: if ($ownerfilter ne '.') {
4679: if (!$is_hash) {
4680: $unesc_val{'owner'} = &unescape($val{'owner'});
4681: }
4682: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4683: if ($unesc_val{'owner'} =~ /:/) {
4684: if (eval{$unesc_val{'owner'} !~
4685: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4686: $match = 0;
4687: }
4688: } else {
4689: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4690: $match = 0;
4691: }
4692: }
4693: } elsif ($ownerunamefilter ne '') {
4694: if ($unesc_val{'owner'} =~ /:/) {
4695: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4696: $match = 0;
4697: }
4698: } else {
4699: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4700: $match = 0;
4701: }
4702: }
4703: } elsif ($ownerdomfilter ne '') {
4704: if ($unesc_val{'owner'} =~ /:/) {
4705: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4706: $match = 0;
4707: }
4708: } else {
4709: if ($ownerdomfilter ne $udom) {
4710: $match = 0;
4711: }
4712: }
4713: }
4714: }
4715: if ($coursefilter ne '.') {
4716: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4717: $match = 0;
4718: }
4719: }
4720: if ($typefilter ne '.') {
4721: if (!$is_hash) {
4722: $unesc_val{'type'} = &unescape($val{'type'});
4723: }
4724: if ($unesc_val{'type'} eq '') {
4725: if ($typefilter ne 'Course') {
4726: $match = 0;
4727: }
4728: } else {
4729: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4730: $match = 0;
4731: }
4732: }
4733: }
4734: if ($match == 1) {
4735: if ($rtn_as_hash) {
4736: if ($is_hash) {
4737: if ($valchange) {
4738: my $newvalue = &Apache::lonnet::freeze_escape($items);
4739: $qresult.=$key.'='.$newvalue.'&';
4740: } else {
4741: $qresult.=$key.'='.$value.'&';
4742: }
4743: } else {
4744: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4745: 'inst_code' => &unescape($val{'inst_code'}),
4746: 'owner' => &unescape($val{'owner'}),
4747: 'type' => &unescape($val{'type'}),
4748: 'cloners' => &unescape($val{'cloners'}),
4749: );
4750: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4751: $qresult.=$key.'='.$items.'&';
4752: }
4753: } else {
4754: if ($is_hash) {
4755: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4756: &escape($unesc_val{'inst_code'}).':'.
4757: &escape($unesc_val{'owner'}).'&';
4758: } else {
4759: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4760: ':'.$val{'owner'}.'&';
4761: }
4762: }
4763: }
4764: }
4765: if (&untie_domain_hash($hashref)) {
4766: chop($qresult);
4767: &Reply($client, \$qresult, $userinput);
4768: } else {
4769: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4770: "while attempting courseiddump\n", $userinput);
4771: }
4772: } else {
4773: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4774: "while attempting courseiddump\n", $userinput);
4775: }
4776: return 1;
4777: }
4778: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4779:
4780: sub course_lastaccess_handler {
4781: my ($cmd, $tail, $client) = @_;
4782: my $userinput = "$cmd:$tail";
4783: my ($cdom,$cnum) = split(':',$tail);
4784: my (%lastaccess,$qresult);
4785: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4786: if ($hashref) {
4787: while (my ($key,$value) = each(%$hashref)) {
4788: my ($unesc_key,$lasttime);
4789: $unesc_key = &unescape($key);
4790: if ($cnum) {
4791: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4792: }
4793: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4794: $lastaccess{$1} = $value;
4795: } else {
4796: my $items = &Apache::lonnet::thaw_unescape($value);
4797: if (ref($items) eq 'HASH') {
4798: unless ($lastaccess{$unesc_key}) {
4799: $lastaccess{$unesc_key} = '';
4800: }
4801: } else {
4802: my @courseitems = split(':',$value);
4803: $lastaccess{$unesc_key} = pop(@courseitems);
4804: }
4805: }
4806: }
4807: foreach my $cid (sort(keys(%lastaccess))) {
4808: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4809: }
4810: if (&untie_domain_hash($hashref)) {
4811: if ($qresult) {
4812: chop($qresult);
4813: }
4814: &Reply($client, \$qresult, $userinput);
4815: } else {
4816: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4817: "while attempting lastacourseaccess\n", $userinput);
4818: }
4819: } else {
4820: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4821: "while attempting lastcourseaccess\n", $userinput);
4822: }
4823: return 1;
4824: }
4825: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4826:
4827: #
4828: # Puts an unencrypted entry in a namespace db file at the domain level
4829: #
4830: # Parameters:
4831: # $cmd - The command that got us here.
4832: # $tail - Tail of the command (remaining parameters).
4833: # $client - File descriptor connected to client.
4834: # Returns
4835: # 0 - Requested to exit, caller should shut down.
4836: # 1 - Continue processing.
4837: # Side effects:
4838: # reply is written to $client.
4839: #
4840: sub put_domain_handler {
4841: my ($cmd,$tail,$client) = @_;
4842:
4843: my $userinput = "$cmd:$tail";
4844:
4845: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4846: chomp($what);
4847: my @pairs=split(/\&/,$what);
4848: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4849: "P", $what);
4850: if ($hashref) {
4851: foreach my $pair (@pairs) {
4852: my ($key,$value)=split(/=/,$pair);
4853: $hashref->{$key}=$value;
4854: }
4855: if (&untie_domain_hash($hashref)) {
4856: &Reply($client, "ok\n", $userinput);
4857: } else {
4858: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4859: "while attempting putdom\n", $userinput);
4860: }
4861: } else {
4862: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4863: "while attempting putdom\n", $userinput);
4864: }
4865:
4866: return 1;
4867: }
4868: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4869:
4870: # Updates one or more entries in clickers.db file at the domain level
4871: #
4872: # Parameters:
4873: # $cmd - The command that got us here.
4874: # $tail - Tail of the command (remaining parameters).
4875: # In this case a colon separated list containing:
4876: # (a) the domain for which we are updating the entries,
4877: # (b) the action required -- add or del -- and
4878: # (c) a &-separated list of entries to add or delete.
4879: # $client - File descriptor connected to client.
4880: # Returns
4881: # 1 - Continue processing.
4882: # 0 - Requested to exit, caller should shut down.
4883: # Side effects:
4884: # reply is written to $client.
4885: #
4886:
4887:
4888: sub update_clickers {
4889: my ($cmd, $tail, $client) = @_;
4890:
4891: my $userinput = "$cmd:$tail";
4892: my ($udom,$action,$what) =split(/:/,$tail,3);
4893: chomp($what);
4894:
4895: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
4896: "U","$action:$what");
4897:
4898: if (!$hashref) {
4899: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4900: "while attempting updateclickers\n", $userinput);
4901: return 1;
4902: }
4903:
4904: my @pairs=split(/\&/,$what);
4905: foreach my $pair (@pairs) {
4906: my ($key,$value)=split(/=/,$pair);
4907: if ($action eq 'add') {
4908: if (exists($hashref->{$key})) {
4909: my @newvals = split(/,/,&unescape($value));
4910: my @currvals = split(/,/,&unescape($hashref->{$key}));
4911: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
4912: $hashref->{$key}=&escape(join(',',@merged));
4913: } else {
4914: $hashref->{$key}=$value;
4915: }
4916: } elsif ($action eq 'del') {
4917: if (exists($hashref->{$key})) {
4918: my %current;
4919: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
4920: map { delete($current{$_}); } split(/,/,&unescape($value));
4921: if (keys(%current)) {
4922: $hashref->{$key}=&escape(join(',',sort(keys(%current))));
4923: } else {
4924: delete($hashref->{$key});
4925: }
4926: }
4927: }
4928: }
4929: if (&untie_user_hash($hashref)) {
4930: &Reply( $client, "ok\n", $userinput);
4931: } else {
4932: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
4933: "while attempting put\n",
4934: $userinput);
4935: }
4936: return 1;
4937: }
4938: ®ister_handler("updateclickers", \&update_clickers, 0, 1, 0);
4939:
4940:
4941: # Deletes one or more entries in a namespace db file at the domain level
4942: #
4943: # Parameters:
4944: # $cmd - The command that got us here.
4945: # $tail - Tail of the command (remaining parameters).
4946: # In this case a colon separated list containing:
4947: # (a) the domain for which we are deleting the entries,
4948: # (b) &-separated list of keys to delete.
4949: # $client - File descriptor connected to client.
4950: # Returns
4951: # 1 - Continue processing.
4952: # 0 - Requested to exit, caller should shut down.
4953: # Side effects:
4954: # reply is written to $client.
4955: #
4956:
4957: sub del_domain_handler {
4958: my ($cmd,$tail,$client) = @_;
4959:
4960: my $userinput = "$cmd:$tail";
4961:
4962: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4963: chomp($what);
4964: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
4965: "D", $what);
4966: if ($hashref) {
4967: my @keys=split(/\&/,$what);
4968: foreach my $key (@keys) {
4969: delete($hashref->{$key});
4970: }
4971: if (&untie_user_hash($hashref)) {
4972: &Reply($client, "ok\n", $userinput);
4973: } else {
4974: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4975: "while attempting deldom\n", $userinput);
4976: }
4977: } else {
4978: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4979: "while attempting deldom\n", $userinput);
4980: }
4981: return 1;
4982: }
4983: ®ister_handler("deldom", \&del_domain_handler, 0, 1, 0);
4984:
4985:
4986: # Unencrypted get from the namespace database file at the domain level.
4987: # This function retrieves a keyed item from a specific named database in the
4988: # domain directory.
4989: #
4990: # Parameters:
4991: # $cmd - Command request keyword (get).
4992: # $tail - Tail of the command. This is a colon separated list
4993: # consisting of the domain and the 'namespace'
4994: # which selects the gdbm file to do the lookup in,
4995: # & separated list of keys to lookup. Note that
4996: # the values are returned as an & separated list too.
4997: # $client - File descriptor open on the client.
4998: # Returns:
4999: # 1 - Continue processing.
5000: # 0 - Exit.
5001: # Side effects:
5002: # reply is written to $client.
5003: #
5004:
5005: sub get_domain_handler {
5006: my ($cmd, $tail, $client) = @_;
5007:
5008:
5009: my $userinput = "$cmd:$tail";
5010:
5011: my ($udom,$namespace,$what)=split(/:/,$tail,3);
5012: chomp($what);
5013: if ($namespace =~ /^enc/) {
5014: &Failure( $client, "refused\n", $userinput);
5015: } else {
5016: my @queries=split(/\&/,$what);
5017: my $qresult='';
5018: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
5019: if ($hashref) {
5020: for (my $i=0;$i<=$#queries;$i++) {
5021: $qresult.="$hashref->{$queries[$i]}&";
5022: }
5023: if (&untie_domain_hash($hashref)) {
5024: $qresult=~s/\&$//;
5025: &Reply($client, \$qresult, $userinput);
5026: } else {
5027: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
5028: "while attempting getdom\n",$userinput);
5029: }
5030: } else {
5031: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5032: "while attempting getdom\n",$userinput);
5033: }
5034: }
5035:
5036: return 1;
5037: }
5038: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
5039:
5040: sub encrypted_get_domain_handler {
5041: my ($cmd, $tail, $client) = @_;
5042:
5043: my $userinput = "$cmd:$tail";
5044:
5045: my ($udom,$namespace,$what)=split(/:/,$tail,3);
5046: chomp($what);
5047: my @queries=split(/\&/,$what);
5048: my $qresult='';
5049: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
5050: if ($hashref) {
5051: for (my $i=0;$i<=$#queries;$i++) {
5052: $qresult.="$hashref->{$queries[$i]}&";
5053: }
5054: if (&untie_domain_hash($hashref)) {
5055: $qresult=~s/\&$//;
5056: if ($cipher) {
5057: my $cmdlength=length($qresult);
5058: $qresult.=" ";
5059: my $encqresult='';
5060: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
5061: $encqresult.= unpack("H16",
5062: $cipher->encrypt(substr($qresult,
5063: $encidx,
5064: 8)));
5065: }
5066: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
5067: } else {
5068: &Failure( $client, "error:no_key\n", $userinput);
5069: }
5070: } else {
5071: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
5072: "while attempting egetdom\n",$userinput);
5073: }
5074: } else {
5075: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5076: "while attempting egetdom\n",$userinput);
5077: }
5078: return 1;
5079: }
5080: ®ister_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0);
5081:
5082: #
5083: # Puts an id to a domains id database.
5084: #
5085: # Parameters:
5086: # $cmd - The command that triggered us.
5087: # $tail - Remainder of the request other than the command. This is a
5088: # colon separated list containing:
5089: # $domain - The domain for which we are writing the id.
5090: # $pairs - The id info to write... this is and & separated list
5091: # of keyword=value.
5092: # $client - Socket open on the client.
5093: # Returns:
5094: # 1 - Continue processing.
5095: # Side effects:
5096: # reply is written to $client.
5097: #
5098: sub put_id_handler {
5099: my ($cmd,$tail,$client) = @_;
5100:
5101:
5102: my $userinput = "$cmd:$tail";
5103:
5104: my ($udom,$what)=split(/:/,$tail);
5105: chomp($what);
5106: my @pairs=split(/\&/,$what);
5107: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
5108: "P", $what);
5109: if ($hashref) {
5110: foreach my $pair (@pairs) {
5111: my ($key,$value)=split(/=/,$pair);
5112: $hashref->{$key}=$value;
5113: }
5114: if (&untie_domain_hash($hashref)) {
5115: &Reply($client, "ok\n", $userinput);
5116: } else {
5117: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5118: "while attempting idput\n", $userinput);
5119: }
5120: } else {
5121: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5122: "while attempting idput\n", $userinput);
5123: }
5124:
5125: return 1;
5126: }
5127: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
5128:
5129: #
5130: # Retrieves a set of id values from the id database.
5131: # Returns an & separated list of results, one for each requested id to the
5132: # client.
5133: #
5134: # Parameters:
5135: # $cmd - Command keyword that caused us to be dispatched.
5136: # $tail - Tail of the command. Consists of a colon separated:
5137: # domain - the domain whose id table we dump
5138: # ids Consists of an & separated list of
5139: # id keywords whose values will be fetched.
5140: # nonexisting keywords will have an empty value.
5141: # $client - Socket open on the client.
5142: #
5143: # Returns:
5144: # 1 - indicating processing should continue.
5145: # Side effects:
5146: # An & separated list of results is written to $client.
5147: #
5148: sub get_id_handler {
5149: my ($cmd, $tail, $client) = @_;
5150:
5151:
5152: my $userinput = "$client:$tail";
5153:
5154: my ($udom,$what)=split(/:/,$tail);
5155: chomp($what);
5156: my @queries=split(/\&/,$what);
5157: my $qresult='';
5158: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
5159: if ($hashref) {
5160: for (my $i=0;$i<=$#queries;$i++) {
5161: $qresult.="$hashref->{$queries[$i]}&";
5162: }
5163: if (&untie_domain_hash($hashref)) {
5164: $qresult=~s/\&$//;
5165: &Reply($client, \$qresult, $userinput);
5166: } else {
5167: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
5168: "while attempting idget\n",$userinput);
5169: }
5170: } else {
5171: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5172: "while attempting idget\n",$userinput);
5173: }
5174:
5175: return 1;
5176: }
5177: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
5178:
5179: # Deletes one or more ids in a domain's id database.
5180: #
5181: # Parameters:
5182: # $cmd - Command keyword (iddel).
5183: # $tail - Command tail. In this case a colon
5184: # separated list containing:
5185: # The domain for which we are deleting the id(s).
5186: # &-separated list of id(s) to delete.
5187: # $client - File open on client socket.
5188: # Returns:
5189: # 1 - Continue processing
5190: # 0 - Exit server.
5191: #
5192: #
5193:
5194: sub del_id_handler {
5195: my ($cmd,$tail,$client) = @_;
5196:
5197: my $userinput = "$cmd:$tail";
5198:
5199: my ($udom,$what)=split(/:/,$tail);
5200: chomp($what);
5201: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
5202: "D", $what);
5203: if ($hashref) {
5204: my @keys=split(/\&/,$what);
5205: foreach my $key (@keys) {
5206: delete($hashref->{$key});
5207: }
5208: if (&untie_user_hash($hashref)) {
5209: &Reply($client, "ok\n", $userinput);
5210: } else {
5211: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5212: "while attempting iddel\n", $userinput);
5213: }
5214: } else {
5215: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5216: "while attempting iddel\n", $userinput);
5217: }
5218: return 1;
5219: }
5220: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
5221:
5222: #
5223: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
5224: #
5225: # Parameters
5226: # $cmd - Command keyword that caused us to be dispatched.
5227: # $tail - Tail of the command. Consists of a colon separated:
5228: # domain - the domain whose dcmail we are recording
5229: # email Consists of key=value pair
5230: # where key is unique msgid
5231: # and value is message (in XML)
5232: # $client - Socket open on the client.
5233: #
5234: # Returns:
5235: # 1 - indicating processing should continue.
5236: # Side effects
5237: # reply is written to $client.
5238: #
5239: sub put_dcmail_handler {
5240: my ($cmd,$tail,$client) = @_;
5241: my $userinput = "$cmd:$tail";
5242:
5243:
5244: my ($udom,$what)=split(/:/,$tail);
5245: chomp($what);
5246: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5247: if ($hashref) {
5248: my ($key,$value)=split(/=/,$what);
5249: $hashref->{$key}=$value;
5250: }
5251: if (&untie_domain_hash($hashref)) {
5252: &Reply($client, "ok\n", $userinput);
5253: } else {
5254: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5255: "while attempting dcmailput\n", $userinput);
5256: }
5257: return 1;
5258: }
5259: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
5260:
5261: #
5262: # Retrieves broadcast e-mail from nohist_dcmail database
5263: # Returns to client an & separated list of key=value pairs,
5264: # where key is msgid and value is message information.
5265: #
5266: # Parameters
5267: # $cmd - Command keyword that caused us to be dispatched.
5268: # $tail - Tail of the command. Consists of a colon separated:
5269: # domain - the domain whose dcmail table we dump
5270: # startfilter - beginning of time window
5271: # endfilter - end of time window
5272: # sendersfilter - & separated list of username:domain
5273: # for senders to search for.
5274: # $client - Socket open on the client.
5275: #
5276: # Returns:
5277: # 1 - indicating processing should continue.
5278: # Side effects
5279: # reply (& separated list of msgid=messageinfo pairs) is
5280: # written to $client.
5281: #
5282: sub dump_dcmail_handler {
5283: my ($cmd, $tail, $client) = @_;
5284:
5285: my $userinput = "$cmd:$tail";
5286: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
5287: chomp($sendersfilter);
5288: my @senders = ();
5289: if (defined($startfilter)) {
5290: $startfilter=&unescape($startfilter);
5291: } else {
5292: $startfilter='.';
5293: }
5294: if (defined($endfilter)) {
5295: $endfilter=&unescape($endfilter);
5296: } else {
5297: $endfilter='.';
5298: }
5299: if (defined($sendersfilter)) {
5300: $sendersfilter=&unescape($sendersfilter);
5301: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
5302: }
5303:
5304: my $qresult='';
5305: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5306: if ($hashref) {
5307: while (my ($key,$value) = each(%$hashref)) {
5308: my $match = 1;
5309: my ($timestamp,$subj,$uname,$udom) =
5310: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
5311: $subj = &unescape($subj);
5312: unless ($startfilter eq '.' || !defined($startfilter)) {
5313: if ($timestamp < $startfilter) {
5314: $match = 0;
5315: }
5316: }
5317: unless ($endfilter eq '.' || !defined($endfilter)) {
5318: if ($timestamp > $endfilter) {
5319: $match = 0;
5320: }
5321: }
5322: unless (@senders < 1) {
5323: unless (grep/^$uname:$udom$/,@senders) {
5324: $match = 0;
5325: }
5326: }
5327: if ($match == 1) {
5328: $qresult.=$key.'='.$value.'&';
5329: }
5330: }
5331: if (&untie_domain_hash($hashref)) {
5332: chop($qresult);
5333: &Reply($client, \$qresult, $userinput);
5334: } else {
5335: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5336: "while attempting dcmaildump\n", $userinput);
5337: }
5338: } else {
5339: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5340: "while attempting dcmaildump\n", $userinput);
5341: }
5342: return 1;
5343: }
5344:
5345: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
5346:
5347: #
5348: # Puts domain roles in nohist_domainroles database
5349: #
5350: # Parameters
5351: # $cmd - Command keyword that caused us to be dispatched.
5352: # $tail - Tail of the command. Consists of a colon separated:
5353: # domain - the domain whose roles we are recording
5354: # role - Consists of key=value pair
5355: # where key is unique role
5356: # and value is start/end date information
5357: # $client - Socket open on the client.
5358: #
5359: # Returns:
5360: # 1 - indicating processing should continue.
5361: # Side effects
5362: # reply is written to $client.
5363: #
5364:
5365: sub put_domainroles_handler {
5366: my ($cmd,$tail,$client) = @_;
5367:
5368: my $userinput = "$cmd:$tail";
5369: my ($udom,$what)=split(/:/,$tail);
5370: chomp($what);
5371: my @pairs=split(/\&/,$what);
5372: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5373: if ($hashref) {
5374: foreach my $pair (@pairs) {
5375: my ($key,$value)=split(/=/,$pair);
5376: $hashref->{$key}=$value;
5377: }
5378: if (&untie_domain_hash($hashref)) {
5379: &Reply($client, "ok\n", $userinput);
5380: } else {
5381: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5382: "while attempting domroleput\n", $userinput);
5383: }
5384: } else {
5385: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5386: "while attempting domroleput\n", $userinput);
5387: }
5388:
5389: return 1;
5390: }
5391:
5392: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
5393:
5394: #
5395: # Retrieves domain roles from nohist_domainroles database
5396: # Returns to client an & separated list of key=value pairs,
5397: # where key is role and value is start and end date information.
5398: #
5399: # Parameters
5400: # $cmd - Command keyword that caused us to be dispatched.
5401: # $tail - Tail of the command. Consists of a colon separated:
5402: # domain - the domain whose domain roles table we dump
5403: # $client - Socket open on the client.
5404: #
5405: # Returns:
5406: # 1 - indicating processing should continue.
5407: # Side effects
5408: # reply (& separated list of role=start/end info pairs) is
5409: # written to $client.
5410: #
5411: sub dump_domainroles_handler {
5412: my ($cmd, $tail, $client) = @_;
5413:
5414: my $userinput = "$cmd:$tail";
5415: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
5416: chomp($rolesfilter);
5417: my @roles = ();
5418: if (defined($startfilter)) {
5419: $startfilter=&unescape($startfilter);
5420: } else {
5421: $startfilter='.';
5422: }
5423: if (defined($endfilter)) {
5424: $endfilter=&unescape($endfilter);
5425: } else {
5426: $endfilter='.';
5427: }
5428: if (defined($rolesfilter)) {
5429: $rolesfilter=&unescape($rolesfilter);
5430: @roles = split(/\&/,$rolesfilter);
5431: }
5432:
5433: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5434: if ($hashref) {
5435: my $qresult = '';
5436: while (my ($key,$value) = each(%$hashref)) {
5437: my $match = 1;
5438: my ($end,$start) = split(/:/,&unescape($value));
5439: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
5440: unless (@roles < 1) {
5441: unless (grep/^\Q$trole\E$/,@roles) {
5442: $match = 0;
5443: next;
5444: }
5445: }
5446: unless ($startfilter eq '.' || !defined($startfilter)) {
5447: if ((defined($start)) && ($start >= $startfilter)) {
5448: $match = 0;
5449: next;
5450: }
5451: }
5452: unless ($endfilter eq '.' || !defined($endfilter)) {
5453: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
5454: $match = 0;
5455: next;
5456: }
5457: }
5458: if ($match == 1) {
5459: $qresult.=$key.'='.$value.'&';
5460: }
5461: }
5462: if (&untie_domain_hash($hashref)) {
5463: chop($qresult);
5464: &Reply($client, \$qresult, $userinput);
5465: } else {
5466: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5467: "while attempting domrolesdump\n", $userinput);
5468: }
5469: } else {
5470: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5471: "while attempting domrolesdump\n", $userinput);
5472: }
5473: return 1;
5474: }
5475:
5476: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
5477:
5478:
5479: # Process the tmpput command I'm not sure what this does.. Seems to
5480: # create a file in the lonDaemons/tmp directory of the form $id.tmp
5481: # where Id is the client's ip concatenated with a sequence number.
5482: # The file will contain some value that is passed in. Is this e.g.
5483: # a login token?
5484: #
5485: # Parameters:
5486: # $cmd - The command that got us dispatched.
5487: # $tail - The remainder of the request following $cmd:
5488: # In this case this will be the contents of the file.
5489: # $client - Socket connected to the client.
5490: # Returns:
5491: # 1 indicating processing can continue.
5492: # Side effects:
5493: # A file is created in the local filesystem.
5494: # A reply is sent to the client.
5495: sub tmp_put_handler {
5496: my ($cmd, $what, $client) = @_;
5497:
5498: my $userinput = "$cmd:$what"; # Reconstruct for logging.
5499:
5500: my ($record,$context) = split(/:/,$what);
5501: if ($context ne '') {
5502: chomp($context);
5503: $context = &unescape($context);
5504: }
5505: my ($id,$store);
5506: $tmpsnum++;
5507: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
5508: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
5509: } else {
5510: $id = $$.'_'.$clientip.'_'.$tmpsnum;
5511: }
5512: $id=~s/\W/\_/g;
5513: $record=~s/\n//g;
5514: my $execdir=$perlvar{'lonDaemons'};
5515: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
5516: print $store $record;
5517: close $store;
5518: &Reply($client, \$id, $userinput);
5519: } else {
5520: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5521: "while attempting tmpput\n", $userinput);
5522: }
5523: return 1;
5524:
5525: }
5526: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
5527:
5528: # Processes the tmpget command. This command returns the contents
5529: # of a temporary resource file(?) created via tmpput.
5530: #
5531: # Paramters:
5532: # $cmd - Command that got us dispatched.
5533: # $id - Tail of the command, contain the id of the resource
5534: # we want to fetch.
5535: # $client - socket open on the client.
5536: # Return:
5537: # 1 - Inidcating processing can continue.
5538: # Side effects:
5539: # A reply is sent to the client.
5540: #
5541: sub tmp_get_handler {
5542: my ($cmd, $id, $client) = @_;
5543:
5544: my $userinput = "$cmd:$id";
5545:
5546:
5547: $id=~s/\W/\_/g;
5548: my $store;
5549: my $execdir=$perlvar{'lonDaemons'};
5550: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
5551: my $reply=<$store>;
5552: &Reply( $client, \$reply, $userinput);
5553: close $store;
5554: } else {
5555: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5556: "while attempting tmpget\n", $userinput);
5557: }
5558:
5559: return 1;
5560: }
5561: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
5562:
5563: #
5564: # Process the tmpdel command. This command deletes a temp resource
5565: # created by the tmpput command.
5566: #
5567: # Parameters:
5568: # $cmd - Command that got us here.
5569: # $id - Id of the temporary resource created.
5570: # $client - socket open on the client process.
5571: #
5572: # Returns:
5573: # 1 - Indicating processing should continue.
5574: # Side Effects:
5575: # A file is deleted
5576: # A reply is sent to the client.
5577: sub tmp_del_handler {
5578: my ($cmd, $id, $client) = @_;
5579:
5580: my $userinput= "$cmd:$id";
5581:
5582: chomp($id);
5583: $id=~s/\W/\_/g;
5584: my $execdir=$perlvar{'lonDaemons'};
5585: if (unlink("$execdir/tmp/$id.tmp")) {
5586: &Reply($client, "ok\n", $userinput);
5587: } else {
5588: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
5589: "while attempting tmpdel\n", $userinput);
5590: }
5591:
5592: return 1;
5593:
5594: }
5595: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
5596:
5597: #
5598: # Process the delbalcookie command. This command deletes a balancer
5599: # cookie in the lonBalancedir directory created by switchserver
5600: #
5601: # Parameters:
5602: # $cmd - Command that got us here.
5603: # $cookie - Cookie to be deleted.
5604: # $client - socket open on the client process.
5605: #
5606: # Returns:
5607: # 1 - Indicating processing should continue.
5608: # Side Effects:
5609: # A cookie file is deleted from the lonBalancedir directory
5610: # A reply is sent to the client.
5611: sub del_balcookie_handler {
5612: my ($cmd, $cookie, $client) = @_;
5613:
5614: my $userinput= "$cmd:$cookie";
5615:
5616: chomp($cookie);
5617: my $deleted = '';
5618: if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
5619: my $execdir=$perlvar{'lonBalanceDir'};
5620: if (-e "$execdir/$cookie.id") {
5621: if (open(my $fh,'<',"$execdir/$cookie.id")) {
5622: my $dodelete;
5623: while (my $line = <$fh>) {
5624: chomp($line);
5625: if ($line eq $clientname) {
5626: $dodelete = 1;
5627: last;
5628: }
5629: }
5630: close($fh);
5631: if ($dodelete) {
5632: if (unlink("$execdir/$cookie.id")) {
5633: $deleted = 1;
5634: }
5635: }
5636: }
5637: }
5638: }
5639: if ($deleted) {
5640: &Reply($client, "ok\n", $userinput);
5641: } else {
5642: &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ".
5643: "while attempting delbalcookie\n", $userinput);
5644: }
5645: return 1;
5646: }
5647: ®ister_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0);
5648:
5649: #
5650: # Processes the setannounce command. This command
5651: # creates a file named announce.txt in the top directory of
5652: # the documentn root and sets its contents. The announce.txt file is
5653: # printed in its entirety at the LonCAPA login page. Note:
5654: # once the announcement.txt fileis created it cannot be deleted.
5655: # However, setting the contents of the file to empty removes the
5656: # announcement from the login page of loncapa so who cares.
5657: #
5658: # Parameters:
5659: # $cmd - The command that got us dispatched.
5660: # $announcement - The text of the announcement.
5661: # $client - Socket open on the client process.
5662: # Retunrns:
5663: # 1 - Indicating request processing should continue
5664: # Side Effects:
5665: # The file {DocRoot}/announcement.txt is created.
5666: # A reply is sent to $client.
5667: #
5668: sub set_announce_handler {
5669: my ($cmd, $announcement, $client) = @_;
5670:
5671: my $userinput = "$cmd:$announcement";
5672:
5673: chomp($announcement);
5674: $announcement=&unescape($announcement);
5675: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
5676: '/announcement.txt')) {
5677: print $store $announcement;
5678: close $store;
5679: &Reply($client, "ok\n", $userinput);
5680: } else {
5681: &Failure($client, "error: ".($!+0)."\n", $userinput);
5682: }
5683:
5684: return 1;
5685: }
5686: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
5687:
5688: #
5689: # Return the version of the daemon. This can be used to determine
5690: # the compatibility of cross version installations or, alternatively to
5691: # simply know who's out of date and who isn't. Note that the version
5692: # is returned concatenated with the tail.
5693: # Parameters:
5694: # $cmd - the request that dispatched to us.
5695: # $tail - Tail of the request (client's version?).
5696: # $client - Socket open on the client.
5697: #Returns:
5698: # 1 - continue processing requests.
5699: # Side Effects:
5700: # Replies with version to $client.
5701: sub get_version_handler {
5702: my ($cmd, $tail, $client) = @_;
5703:
5704: my $userinput = $cmd.$tail;
5705:
5706: &Reply($client, &version($userinput)."\n", $userinput);
5707:
5708:
5709: return 1;
5710: }
5711: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
5712:
5713: # Set the current host and domain. This is used to support
5714: # multihomed systems. Each IP of the system, or even separate daemons
5715: # on the same IP can be treated as handling a separate lonCAPA virtual
5716: # machine. This command selects the virtual lonCAPA. The client always
5717: # knows the right one since it is lonc and it is selecting the domain/system
5718: # from the hosts.tab file.
5719: # Parameters:
5720: # $cmd - Command that dispatched us.
5721: # $tail - Tail of the command (domain/host requested).
5722: # $socket - Socket open on the client.
5723: #
5724: # Returns:
5725: # 1 - Indicates the program should continue to process requests.
5726: # Side-effects:
5727: # The default domain/system context is modified for this daemon.
5728: # a reply is sent to the client.
5729: #
5730: sub set_virtual_host_handler {
5731: my ($cmd, $tail, $socket) = @_;
5732:
5733: my $userinput ="$cmd:$tail";
5734:
5735: &Reply($client, &sethost($userinput)."\n", $userinput);
5736:
5737:
5738: return 1;
5739: }
5740: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
5741:
5742: # Process a request to exit:
5743: # - "bye" is sent to the client.
5744: # - The client socket is shutdown and closed.
5745: # - We indicate to the caller that we should exit.
5746: # Formal Parameters:
5747: # $cmd - The command that got us here.
5748: # $tail - Tail of the command (empty).
5749: # $client - Socket open on the tail.
5750: # Returns:
5751: # 0 - Indicating the program should exit!!
5752: #
5753: sub exit_handler {
5754: my ($cmd, $tail, $client) = @_;
5755:
5756: my $userinput = "$cmd:$tail";
5757:
5758: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5759: &Reply($client, "bye\n", $userinput);
5760: $client->shutdown(2); # shutdown the socket forcibly.
5761: $client->close();
5762:
5763: return 0;
5764: }
5765: ®ister_handler("exit", \&exit_handler, 0,1,1);
5766: ®ister_handler("init", \&exit_handler, 0,1,1);
5767: ®ister_handler("quit", \&exit_handler, 0,1,1);
5768:
5769: # Determine if auto-enrollment is enabled.
5770: # Note that the original had what I believe to be a defect.
5771: # The original returned 0 if the requestor was not a registerd client.
5772: # It should return "refused".
5773: # Formal Parameters:
5774: # $cmd - The command that invoked us.
5775: # $tail - The tail of the command (Extra command parameters.
5776: # $client - The socket open on the client that issued the request.
5777: # Returns:
5778: # 1 - Indicating processing should continue.
5779: #
5780: sub enrollment_enabled_handler {
5781: my ($cmd, $tail, $client) = @_;
5782: my $userinput = $cmd.":".$tail; # For logging purposes.
5783:
5784:
5785: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5786:
5787: my $outcome = &localenroll::run($cdom);
5788: &Reply($client, \$outcome, $userinput);
5789:
5790: return 1;
5791: }
5792: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5793:
5794: #
5795: # Validate an institutional code used for a LON-CAPA course.
5796: #
5797: # Formal Parameters:
5798: # $cmd - The command request that got us dispatched.
5799: # $tail - The tail of the command. In this case,
5800: # this is a colon separated set of words that will be split
5801: # into:
5802: # $dom - The domain for which the check of
5803: # institutional course code will occur.
5804: #
5805: # $instcode - The institutional code for the course
5806: # being requested, or validated for rights
5807: # to request.
5808: #
5809: # $owner - The course requestor (who will be the
5810: # course owner, in the form username:domain
5811: #
5812: # $client - Socket open on the client.
5813: # Returns:
5814: # 1 - Indicating processing should continue.
5815: #
5816: sub validate_instcode_handler {
5817: my ($cmd, $tail, $client) = @_;
5818: my $userinput = "$cmd:$tail";
5819: my ($dom,$instcode,$owner) = split(/:/, $tail);
5820: $instcode = &unescape($instcode);
5821: $owner = &unescape($owner);
5822: my ($outcome,$description,$credits) =
5823: &localenroll::validate_instcode($dom,$instcode,$owner);
5824: my $result = &escape($outcome).'&'.&escape($description).'&'.
5825: &escape($credits);
5826: &Reply($client, \$result, $userinput);
5827:
5828: return 1;
5829: }
5830: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5831:
5832: # Get the official sections for which auto-enrollment is possible.
5833: # Since the admin people won't know about 'unofficial sections'
5834: # we cannot auto-enroll on them.
5835: # Formal Parameters:
5836: # $cmd - The command request that got us dispatched here.
5837: # $tail - The remainder of the request. In our case this
5838: # will be split into:
5839: # $coursecode - The course name from the admin point of view.
5840: # $cdom - The course's domain(?).
5841: # $client - Socket open on the client.
5842: # Returns:
5843: # 1 - Indiciting processing should continue.
5844: #
5845: sub get_sections_handler {
5846: my ($cmd, $tail, $client) = @_;
5847: my $userinput = "$cmd:$tail";
5848:
5849: my ($coursecode, $cdom) = split(/:/, $tail);
5850: my @secs = &localenroll::get_sections($coursecode,$cdom);
5851: my $seclist = &escape(join(':',@secs));
5852:
5853: &Reply($client, \$seclist, $userinput);
5854:
5855:
5856: return 1;
5857: }
5858: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5859:
5860: # Validate the owner of a new course section.
5861: #
5862: # Formal Parameters:
5863: # $cmd - Command that got us dispatched.
5864: # $tail - the remainder of the command. For us this consists of a
5865: # colon separated string containing:
5866: # $inst - Course Id from the institutions point of view.
5867: # $owner - Proposed owner of the course.
5868: # $cdom - Domain of the course (from the institutions
5869: # point of view?)..
5870: # $client - Socket open on the client.
5871: #
5872: # Returns:
5873: # 1 - Processing should continue.
5874: #
5875: sub validate_course_owner_handler {
5876: my ($cmd, $tail, $client) = @_;
5877: my $userinput = "$cmd:$tail";
5878: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5879:
5880: $owner = &unescape($owner);
5881: $coowners = &unescape($coowners);
5882: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5883: &Reply($client, \$outcome, $userinput);
5884:
5885:
5886:
5887: return 1;
5888: }
5889: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5890:
5891: #
5892: # Validate a course section in the official schedule of classes
5893: # from the institutions point of view (part of autoenrollment).
5894: #
5895: # Formal Parameters:
5896: # $cmd - The command request that got us dispatched.
5897: # $tail - The tail of the command. In this case,
5898: # this is a colon separated set of words that will be split
5899: # into:
5900: # $inst_course_id - The course/section id from the
5901: # institutions point of view.
5902: # $cdom - The domain from the institutions
5903: # point of view.
5904: # $client - Socket open on the client.
5905: # Returns:
5906: # 1 - Indicating processing should continue.
5907: #
5908: sub validate_course_section_handler {
5909: my ($cmd, $tail, $client) = @_;
5910: my $userinput = "$cmd:$tail";
5911: my ($inst_course_id, $cdom) = split(/:/, $tail);
5912:
5913: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5914: &Reply($client, \$outcome, $userinput);
5915:
5916:
5917: return 1;
5918: }
5919: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5920:
5921: #
5922: # Validate course owner's access to enrollment data for specific class section.
5923: #
5924: #
5925: # Formal Parameters:
5926: # $cmd - The command request that got us dispatched.
5927: # $tail - The tail of the command. In this case this is a colon separated
5928: # set of values that will be split into:
5929: # $inst_class - Institutional code for the specific class section
5930: # $ownerlist - An escaped comma-separated list of username:domain
5931: # of the course owner, and co-owner(s).
5932: # $cdom - The domain of the course from the institution's
5933: # point of view.
5934: # $client - The socket open on the client.
5935: # Returns:
5936: # 1 - continue processing.
5937: #
5938:
5939: sub validate_class_access_handler {
5940: my ($cmd, $tail, $client) = @_;
5941: my $userinput = "$cmd:$tail";
5942: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5943: my $owners = &unescape($ownerlist);
5944: my $outcome;
5945: eval {
5946: local($SIG{__DIE__})='DEFAULT';
5947: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5948: };
5949: &Reply($client,\$outcome, $userinput);
5950:
5951: return 1;
5952: }
5953: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5954:
5955: #
5956: # Validate course owner or co-owners(s) access to enrollment data for all sections
5957: # and crosslistings for a particular course.
5958: #
5959: #
5960: # Formal Parameters:
5961: # $cmd - The command request that got us dispatched.
5962: # $tail - The tail of the command. In this case this is a colon separated
5963: # set of values that will be split into:
5964: # $ownerlist - An escaped comma-separated list of username:domain
5965: # of the course owner, and co-owner(s).
5966: # $cdom - The domain of the course from the institution's
5967: # point of view.
5968: # $classes - Frozen hash of institutional course sections and
5969: # crosslistings.
5970: # $client - The socket open on the client.
5971: # Returns:
5972: # 1 - continue processing.
5973: #
5974:
5975: sub validate_classes_handler {
5976: my ($cmd, $tail, $client) = @_;
5977: my $userinput = "$cmd:$tail";
5978: my ($ownerlist,$cdom,$classes) = split(/:/, $tail);
5979: my $classesref = &Apache::lonnet::thaw_unescape($classes);
5980: my $owners = &unescape($ownerlist);
5981: my $result;
5982: eval {
5983: local($SIG{__DIE__})='DEFAULT';
5984: my %validations;
5985: my $response = &localenroll::check_instclasses($owners,$cdom,$classesref,
5986: \%validations);
5987: if ($response eq 'ok') {
5988: foreach my $key (keys(%validations)) {
5989: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5990: }
5991: $result =~ s/\&$//;
5992: } else {
5993: $result = 'error';
5994: }
5995: };
5996: if (!$@) {
5997: &Reply($client, \$result, $userinput);
5998: } else {
5999: &Failure($client,"unknown_cmd\n",$userinput);
6000: }
6001: return 1;
6002: }
6003: ®ister_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0);
6004:
6005: #
6006: # Create a password for a new LON-CAPA user added by auto-enrollment.
6007: # Only used for case where authentication method for new user is localauth
6008: #
6009: # Formal Parameters:
6010: # $cmd - The command request that got us dispatched.
6011: # $tail - The tail of the command. In this case this is a colon separated
6012: # set of words that will be split into:
6013: # $authparam - An authentication parameter (localauth parameter).
6014: # $cdom - The domain of the course from the institution's
6015: # point of view.
6016: # $client - The socket open on the client.
6017: # Returns:
6018: # 1 - continue processing.
6019: #
6020: sub create_auto_enroll_password_handler {
6021: my ($cmd, $tail, $client) = @_;
6022: my $userinput = "$cmd:$tail";
6023:
6024: my ($authparam, $cdom) = split(/:/, $userinput);
6025:
6026: my ($create_passwd,$authchk);
6027: ($authparam,
6028: $create_passwd,
6029: $authchk) = &localenroll::create_password($authparam,$cdom);
6030:
6031: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
6032: $userinput);
6033:
6034:
6035: return 1;
6036: }
6037: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
6038: 0, 1, 0);
6039:
6040: sub auto_export_grades_handler {
6041: my ($cmd, $tail, $client) = @_;
6042: my $userinput = "$cmd:$tail";
6043: my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
6044: my $inforef = &Apache::lonnet::thaw_unescape($info);
6045: my $dataref = &Apache::lonnet::thaw_unescape($data);
6046: my ($outcome,$result);;
6047: eval {
6048: local($SIG{__DIE__})='DEFAULT';
6049: my %rtnhash;
6050: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
6051: if ($outcome eq 'ok') {
6052: foreach my $key (keys(%rtnhash)) {
6053: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
6054: }
6055: $result =~ s/\&$//;
6056: }
6057: };
6058: if (!$@) {
6059: if ($outcome eq 'ok') {
6060: if ($cipher) {
6061: my $cmdlength=length($result);
6062: $result.=" ";
6063: my $encresult='';
6064: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
6065: $encresult.= unpack("H16",
6066: $cipher->encrypt(substr($result,
6067: $encidx,
6068: 8)));
6069: }
6070: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
6071: } else {
6072: &Failure( $client, "error:no_key\n", $userinput);
6073: }
6074: } else {
6075: &Reply($client, "$outcome\n", $userinput);
6076: }
6077: } else {
6078: &Failure($client,"export_error\n",$userinput);
6079: }
6080: return 1;
6081: }
6082: ®ister_handler("autoexportgrades", \&auto_export_grades_handler,
6083: 1, 1, 0);
6084:
6085: # Retrieve and remove temporary files created by/during autoenrollment.
6086: #
6087: # Formal Parameters:
6088: # $cmd - The command that got us dispatched.
6089: # $tail - The tail of the command. In our case this is a colon
6090: # separated list that will be split into:
6091: # $filename - The name of the file to retrieve.
6092: # The filename is given as a path relative to
6093: # the LonCAPA temp file directory.
6094: # $client - Socket open on the client.
6095: #
6096: # Returns:
6097: # 1 - Continue processing.
6098: sub retrieve_auto_file_handler {
6099: my ($cmd, $tail, $client) = @_;
6100: my $userinput = "cmd:$tail";
6101:
6102: my ($filename) = split(/:/, $tail);
6103:
6104: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
6105:
6106: if ($filename =~m{/\.\./}) {
6107: &Failure($client, "refused\n", $userinput);
6108: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
6109: &Failure($client, "refused\n", $userinput);
6110: } elsif ( (-e $source) && ($filename ne '') ) {
6111: my $reply = '';
6112: if (open(my $fh,$source)) {
6113: while (<$fh>) {
6114: chomp($_);
6115: $_ =~ s/^\s+//g;
6116: $_ =~ s/\s+$//g;
6117: $reply .= $_;
6118: }
6119: close($fh);
6120: &Reply($client, &escape($reply)."\n", $userinput);
6121:
6122: # Does this have to be uncommented??!? (RF).
6123: #
6124: # unlink($source);
6125: } else {
6126: &Failure($client, "error\n", $userinput);
6127: }
6128: } else {
6129: &Failure($client, "error\n", $userinput);
6130: }
6131:
6132:
6133: return 1;
6134: }
6135: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
6136:
6137: sub crsreq_checks_handler {
6138: my ($cmd, $tail, $client) = @_;
6139: my $userinput = "$cmd:$tail";
6140: my $dom = $tail;
6141: my $result;
6142: my @reqtypes = ('official','unofficial','community','textbook','placement');
6143: eval {
6144: local($SIG{__DIE__})='DEFAULT';
6145: my %validations;
6146: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
6147: \%validations);
6148: if ($response eq 'ok') {
6149: foreach my $key (keys(%validations)) {
6150: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
6151: }
6152: $result =~ s/\&$//;
6153: } else {
6154: $result = 'error';
6155: }
6156: };
6157: if (!$@) {
6158: &Reply($client, \$result, $userinput);
6159: } else {
6160: &Failure($client,"unknown_cmd\n",$userinput);
6161: }
6162: return 1;
6163: }
6164: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
6165:
6166: sub validate_crsreq_handler {
6167: my ($cmd, $tail, $client) = @_;
6168: my $userinput = "$cmd:$tail";
6169: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
6170: $instcode = &unescape($instcode);
6171: $owner = &unescape($owner);
6172: $crstype = &unescape($crstype);
6173: $inststatuslist = &unescape($inststatuslist);
6174: $instcode = &unescape($instcode);
6175: $instseclist = &unescape($instseclist);
6176: my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
6177: my $outcome;
6178: eval {
6179: local($SIG{__DIE__})='DEFAULT';
6180: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
6181: $inststatuslist,$instcode,
6182: $instseclist,$custominfo);
6183: };
6184: if (!$@) {
6185: &Reply($client, \$outcome, $userinput);
6186: } else {
6187: &Failure($client,"unknown_cmd\n",$userinput);
6188: }
6189: return 1;
6190: }
6191: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
6192:
6193: sub crsreq_update_handler {
6194: my ($cmd, $tail, $client) = @_;
6195: my $userinput = "$cmd:$tail";
6196: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
6197: $accessstart,$accessend,$infohashref) =
6198: split(/:/, $tail);
6199: $crstype = &unescape($crstype);
6200: $action = &unescape($action);
6201: $ownername = &unescape($ownername);
6202: $ownerdomain = &unescape($ownerdomain);
6203: $fullname = &unescape($fullname);
6204: $title = &unescape($title);
6205: $code = &unescape($code);
6206: $accessstart = &unescape($accessstart);
6207: $accessend = &unescape($accessend);
6208: my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
6209: my ($result,$outcome);
6210: eval {
6211: local($SIG{__DIE__})='DEFAULT';
6212: my %rtnhash;
6213: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
6214: $ownername,$ownerdomain,$fullname,
6215: $title,$code,$accessstart,$accessend,
6216: $incoming,\%rtnhash);
6217: if ($outcome eq 'ok') {
6218: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
6219: foreach my $key (keys(%rtnhash)) {
6220: if (grep(/^\Q$key\E/,@posskeys)) {
6221: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
6222: }
6223: }
6224: $result =~ s/\&$//;
6225: }
6226: };
6227: if (!$@) {
6228: if ($outcome eq 'ok') {
6229: &Reply($client, \$result, $userinput);
6230: } else {
6231: &Reply($client, "format_error\n", $userinput);
6232: }
6233: } else {
6234: &Failure($client,"unknown_cmd\n",$userinput);
6235: }
6236: return 1;
6237: }
6238: ®ister_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
6239:
6240: #
6241: # Read and retrieve institutional code format (for support form).
6242: # Formal Parameters:
6243: # $cmd - Command that dispatched us.
6244: # $tail - Tail of the command. In this case it conatins
6245: # the course domain and the coursename.
6246: # $client - Socket open on the client.
6247: # Returns:
6248: # 1 - Continue processing.
6249: #
6250: sub get_institutional_code_format_handler {
6251: my ($cmd, $tail, $client) = @_;
6252: my $userinput = "$cmd:$tail";
6253:
6254: my $reply;
6255: my($cdom,$course) = split(/:/,$tail);
6256: my @pairs = split/\&/,$course;
6257: my %instcodes = ();
6258: my %codes = ();
6259: my @codetitles = ();
6260: my %cat_titles = ();
6261: my %cat_order = ();
6262: foreach (@pairs) {
6263: my ($key,$value) = split/=/,$_;
6264: $instcodes{&unescape($key)} = &unescape($value);
6265: }
6266: my $formatreply = &localenroll::instcode_format($cdom,
6267: \%instcodes,
6268: \%codes,
6269: \@codetitles,
6270: \%cat_titles,
6271: \%cat_order);
6272: if ($formatreply eq 'ok') {
6273: my $codes_str = &Apache::lonnet::hash2str(%codes);
6274: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
6275: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
6276: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
6277: &Reply($client,
6278: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
6279: .$cat_order_str."\n",
6280: $userinput);
6281: } else {
6282: # this else branch added by RF since if not ok, lonc will
6283: # hang waiting on reply until timeout.
6284: #
6285: &Reply($client, "format_error\n", $userinput);
6286: }
6287:
6288: return 1;
6289: }
6290: ®ister_handler("autoinstcodeformat",
6291: \&get_institutional_code_format_handler,0,1,0);
6292:
6293: sub get_institutional_defaults_handler {
6294: my ($cmd, $tail, $client) = @_;
6295: my $userinput = "$cmd:$tail";
6296:
6297: my $dom = $tail;
6298: my %defaults_hash;
6299: my @code_order;
6300: my $outcome;
6301: eval {
6302: local($SIG{__DIE__})='DEFAULT';
6303: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
6304: \@code_order);
6305: };
6306: if (!$@) {
6307: if ($outcome eq 'ok') {
6308: my $result='';
6309: while (my ($key,$value) = each(%defaults_hash)) {
6310: $result.=&escape($key).'='.&escape($value).'&';
6311: }
6312: $result .= 'code_order='.&escape(join('&',@code_order));
6313: &Reply($client,\$result,$userinput);
6314: } else {
6315: &Reply($client,"error\n", $userinput);
6316: }
6317: } else {
6318: &Failure($client,"unknown_cmd\n",$userinput);
6319: }
6320: }
6321: ®ister_handler("autoinstcodedefaults",
6322: \&get_institutional_defaults_handler,0,1,0);
6323:
6324: sub get_possible_instcodes_handler {
6325: my ($cmd, $tail, $client) = @_;
6326: my $userinput = "$cmd:$tail";
6327:
6328: my $reply;
6329: my $cdom = $tail;
6330: my (@codetitles,%cat_titles,%cat_order,@code_order);
6331: my $formatreply = &localenroll::possible_instcodes($cdom,
6332: \@codetitles,
6333: \%cat_titles,
6334: \%cat_order,
6335: \@code_order);
6336: if ($formatreply eq 'ok') {
6337: my $result = join('&',map {&escape($_);} (@codetitles)).':';
6338: $result .= join('&',map {&escape($_);} (@code_order)).':';
6339: foreach my $key (keys(%cat_titles)) {
6340: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
6341: }
6342: $result =~ s/\&$//;
6343: $result .= ':';
6344: foreach my $key (keys(%cat_order)) {
6345: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
6346: }
6347: $result =~ s/\&$//;
6348: &Reply($client,\$result,$userinput);
6349: } else {
6350: &Reply($client, "format_error\n", $userinput);
6351: }
6352: return 1;
6353: }
6354: ®ister_handler("autopossibleinstcodes",
6355: \&get_possible_instcodes_handler,0,1,0);
6356:
6357: sub get_institutional_user_rules {
6358: my ($cmd, $tail, $client) = @_;
6359: my $userinput = "$cmd:$tail";
6360: my $dom = &unescape($tail);
6361: my (%rules_hash,@rules_order);
6362: my $outcome;
6363: eval {
6364: local($SIG{__DIE__})='DEFAULT';
6365: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
6366: };
6367: if (!$@) {
6368: if ($outcome eq 'ok') {
6369: my $result;
6370: foreach my $key (keys(%rules_hash)) {
6371: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6372: }
6373: $result =~ s/\&$//;
6374: $result .= ':';
6375: if (@rules_order > 0) {
6376: foreach my $item (@rules_order) {
6377: $result .= &escape($item).'&';
6378: }
6379: }
6380: $result =~ s/\&$//;
6381: &Reply($client,\$result,$userinput);
6382: } else {
6383: &Reply($client,"error\n", $userinput);
6384: }
6385: } else {
6386: &Failure($client,"unknown_cmd\n",$userinput);
6387: }
6388: }
6389: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
6390:
6391: sub get_institutional_id_rules {
6392: my ($cmd, $tail, $client) = @_;
6393: my $userinput = "$cmd:$tail";
6394: my $dom = &unescape($tail);
6395: my (%rules_hash,@rules_order);
6396: my $outcome;
6397: eval {
6398: local($SIG{__DIE__})='DEFAULT';
6399: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
6400: };
6401: if (!$@) {
6402: if ($outcome eq 'ok') {
6403: my $result;
6404: foreach my $key (keys(%rules_hash)) {
6405: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6406: }
6407: $result =~ s/\&$//;
6408: $result .= ':';
6409: if (@rules_order > 0) {
6410: foreach my $item (@rules_order) {
6411: $result .= &escape($item).'&';
6412: }
6413: }
6414: $result =~ s/\&$//;
6415: &Reply($client,\$result,$userinput);
6416: } else {
6417: &Reply($client,"error\n", $userinput);
6418: }
6419: } else {
6420: &Failure($client,"unknown_cmd\n",$userinput);
6421: }
6422: }
6423: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
6424:
6425: sub get_institutional_selfcreate_rules {
6426: my ($cmd, $tail, $client) = @_;
6427: my $userinput = "$cmd:$tail";
6428: my $dom = &unescape($tail);
6429: my (%rules_hash,@rules_order);
6430: my $outcome;
6431: eval {
6432: local($SIG{__DIE__})='DEFAULT';
6433: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
6434: };
6435: if (!$@) {
6436: if ($outcome eq 'ok') {
6437: my $result;
6438: foreach my $key (keys(%rules_hash)) {
6439: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6440: }
6441: $result =~ s/\&$//;
6442: $result .= ':';
6443: if (@rules_order > 0) {
6444: foreach my $item (@rules_order) {
6445: $result .= &escape($item).'&';
6446: }
6447: }
6448: $result =~ s/\&$//;
6449: &Reply($client,\$result,$userinput);
6450: } else {
6451: &Reply($client,"error\n", $userinput);
6452: }
6453: } else {
6454: &Failure($client,"unknown_cmd\n",$userinput);
6455: }
6456: }
6457: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
6458:
6459:
6460: sub institutional_username_check {
6461: my ($cmd, $tail, $client) = @_;
6462: my $userinput = "$cmd:$tail";
6463: my %rulecheck;
6464: my $outcome;
6465: my ($udom,$uname,@rules) = split(/:/,$tail);
6466: $udom = &unescape($udom);
6467: $uname = &unescape($uname);
6468: @rules = map {&unescape($_);} (@rules);
6469: eval {
6470: local($SIG{__DIE__})='DEFAULT';
6471: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
6472: };
6473: if (!$@) {
6474: if ($outcome eq 'ok') {
6475: my $result='';
6476: foreach my $key (keys(%rulecheck)) {
6477: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6478: }
6479: &Reply($client,\$result,$userinput);
6480: } else {
6481: &Reply($client,"error\n", $userinput);
6482: }
6483: } else {
6484: &Failure($client,"unknown_cmd\n",$userinput);
6485: }
6486: }
6487: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
6488:
6489: sub institutional_id_check {
6490: my ($cmd, $tail, $client) = @_;
6491: my $userinput = "$cmd:$tail";
6492: my %rulecheck;
6493: my $outcome;
6494: my ($udom,$id,@rules) = split(/:/,$tail);
6495: $udom = &unescape($udom);
6496: $id = &unescape($id);
6497: @rules = map {&unescape($_);} (@rules);
6498: eval {
6499: local($SIG{__DIE__})='DEFAULT';
6500: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
6501: };
6502: if (!$@) {
6503: if ($outcome eq 'ok') {
6504: my $result='';
6505: foreach my $key (keys(%rulecheck)) {
6506: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6507: }
6508: &Reply($client,\$result,$userinput);
6509: } else {
6510: &Reply($client,"error\n", $userinput);
6511: }
6512: } else {
6513: &Failure($client,"unknown_cmd\n",$userinput);
6514: }
6515: }
6516: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
6517:
6518: sub institutional_selfcreate_check {
6519: my ($cmd, $tail, $client) = @_;
6520: my $userinput = "$cmd:$tail";
6521: my %rulecheck;
6522: my $outcome;
6523: my ($udom,$email,@rules) = split(/:/,$tail);
6524: $udom = &unescape($udom);
6525: $email = &unescape($email);
6526: @rules = map {&unescape($_);} (@rules);
6527: eval {
6528: local($SIG{__DIE__})='DEFAULT';
6529: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
6530: };
6531: if (!$@) {
6532: if ($outcome eq 'ok') {
6533: my $result='';
6534: foreach my $key (keys(%rulecheck)) {
6535: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6536: }
6537: &Reply($client,\$result,$userinput);
6538: } else {
6539: &Reply($client,"error\n", $userinput);
6540: }
6541: } else {
6542: &Failure($client,"unknown_cmd\n",$userinput);
6543: }
6544: }
6545: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
6546:
6547: # Get domain specific conditions for import of student photographs to a course
6548: #
6549: # Retrieves information from photo_permission subroutine in localenroll.
6550: # Returns outcome (ok) if no processing errors, and whether course owner is
6551: # required to accept conditions of use (yes/no).
6552: #
6553: #
6554: sub photo_permission_handler {
6555: my ($cmd, $tail, $client) = @_;
6556: my $userinput = "$cmd:$tail";
6557: my $cdom = $tail;
6558: my ($perm_reqd,$conditions);
6559: my $outcome;
6560: eval {
6561: local($SIG{__DIE__})='DEFAULT';
6562: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
6563: \$conditions);
6564: };
6565: if (!$@) {
6566: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
6567: $userinput);
6568: } else {
6569: &Failure($client,"unknown_cmd\n",$userinput);
6570: }
6571: return 1;
6572: }
6573: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
6574:
6575: #
6576: # Checks if student photo is available for a user in the domain, in the user's
6577: # directory (in /userfiles/internal/studentphoto.jpg).
6578: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
6579: # the student's photo.
6580:
6581: sub photo_check_handler {
6582: my ($cmd, $tail, $client) = @_;
6583: my $userinput = "$cmd:$tail";
6584: my ($udom,$uname,$pid) = split(/:/,$tail);
6585: $udom = &unescape($udom);
6586: $uname = &unescape($uname);
6587: $pid = &unescape($pid);
6588: my $path=&propath($udom,$uname).'/userfiles/internal/';
6589: if (!-e $path) {
6590: &mkpath($path);
6591: }
6592: my $response;
6593: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
6594: $result .= ':'.$response;
6595: &Reply($client, &escape($result)."\n",$userinput);
6596: return 1;
6597: }
6598: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
6599:
6600: #
6601: # Retrieve information from localenroll about whether to provide a button
6602: # for users who have enbled import of student photos to initiate an
6603: # update of photo files for registered students. Also include
6604: # comment to display alongside button.
6605:
6606: sub photo_choice_handler {
6607: my ($cmd, $tail, $client) = @_;
6608: my $userinput = "$cmd:$tail";
6609: my $cdom = &unescape($tail);
6610: my ($update,$comment);
6611: eval {
6612: local($SIG{__DIE__})='DEFAULT';
6613: ($update,$comment) = &localenroll::manager_photo_update($cdom);
6614: };
6615: if (!$@) {
6616: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
6617: } else {
6618: &Failure($client,"unknown_cmd\n",$userinput);
6619: }
6620: return 1;
6621: }
6622: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
6623:
6624: #
6625: # Gets a student's photo to exist (in the correct image type) in the user's
6626: # directory.
6627: # Formal Parameters:
6628: # $cmd - The command request that got us dispatched.
6629: # $tail - A colon separated set of words that will be split into:
6630: # $domain - student's domain
6631: # $uname - student username
6632: # $type - image type desired
6633: # $client - The socket open on the client.
6634: # Returns:
6635: # 1 - continue processing.
6636:
6637: sub student_photo_handler {
6638: my ($cmd, $tail, $client) = @_;
6639: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
6640:
6641: my $path=&propath($domain,$uname). '/userfiles/internal/';
6642: my $filename = 'studentphoto.'.$ext;
6643: if ($type eq 'thumbnail') {
6644: $filename = 'studentphoto_tn.'.$ext;
6645: }
6646: if (-e $path.$filename) {
6647: &Reply($client,"ok\n","$cmd:$tail");
6648: return 1;
6649: }
6650: &mkpath($path);
6651: my $file;
6652: if ($type eq 'thumbnail') {
6653: eval {
6654: local($SIG{__DIE__})='DEFAULT';
6655: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
6656: };
6657: } else {
6658: $file=&localstudentphoto::fetch($domain,$uname);
6659: }
6660: if (!$file) {
6661: &Failure($client,"unavailable\n","$cmd:$tail");
6662: return 1;
6663: }
6664: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
6665: if (-e $path.$filename) {
6666: &Reply($client,"ok\n","$cmd:$tail");
6667: return 1;
6668: }
6669: &Failure($client,"unable_to_convert\n","$cmd:$tail");
6670: return 1;
6671: }
6672: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
6673:
6674: sub inst_usertypes_handler {
6675: my ($cmd, $domain, $client) = @_;
6676: my $res;
6677: my $userinput = $cmd.":".$domain; # For logging purposes.
6678: my (%typeshash,@order,$result);
6679: eval {
6680: local($SIG{__DIE__})='DEFAULT';
6681: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
6682: };
6683: if ($result eq 'ok') {
6684: if (keys(%typeshash) > 0) {
6685: foreach my $key (keys(%typeshash)) {
6686: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
6687: }
6688: }
6689: $res=~s/\&$//;
6690: $res .= ':';
6691: if (@order > 0) {
6692: foreach my $item (@order) {
6693: $res .= &escape($item).'&';
6694: }
6695: }
6696: $res=~s/\&$//;
6697: }
6698: &Reply($client, \$res, $userinput);
6699: return 1;
6700: }
6701: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
6702:
6703: # mkpath makes all directories for a file, expects an absolute path with a
6704: # file or a trailing / if just a dir is passed
6705: # returns 1 on success 0 on failure
6706: sub mkpath {
6707: my ($file)=@_;
6708: my @parts=split(/\//,$file,-1);
6709: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
6710: for (my $i=3;$i<= ($#parts-1);$i++) {
6711: $now.='/'.$parts[$i];
6712: if (!-e $now) {
6713: if (!mkdir($now,0770)) { return 0; }
6714: }
6715: }
6716: return 1;
6717: }
6718:
6719: #---------------------------------------------------------------
6720: #
6721: # Getting, decoding and dispatching requests:
6722: #
6723: #
6724: # Get a Request:
6725: # Gets a Request message from the client. The transaction
6726: # is defined as a 'line' of text. We remove the new line
6727: # from the text line.
6728: #
6729: sub get_request {
6730: my $input = <$client>;
6731: chomp($input);
6732:
6733: &Debug("get_request: Request = $input\n");
6734:
6735: &status('Processing '.$clientname.':'.$input);
6736:
6737: return $input;
6738: }
6739: #---------------------------------------------------------------
6740: #
6741: # Process a request. This sub should shrink as each action
6742: # gets farmed out into a separat sub that is registered
6743: # with the dispatch hash.
6744: #
6745: # Parameters:
6746: # user_input - The request received from the client (lonc).
6747: #
6748: # Returns:
6749: # true to keep processing, false if caller should exit.
6750: #
6751: sub process_request {
6752: my ($userinput) = @_; # Easier for now to break style than to
6753: # fix all the userinput -> user_input.
6754: my $wasenc = 0; # True if request was encrypted.
6755: # ------------------------------------------------------------ See if encrypted
6756: # for command
6757: # sethost:<server>
6758: # <command>:<args>
6759: # we just send it to the processor
6760: # for
6761: # sethost:<server>:<command>:<args>
6762: # we do the implict set host and then do the command
6763: if ($userinput =~ /^sethost:/) {
6764: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
6765: if (defined($userinput)) {
6766: &sethost("$cmd:$newid");
6767: } else {
6768: $userinput = "$cmd:$newid";
6769: }
6770: }
6771:
6772: if ($userinput =~ /^enc/) {
6773: $userinput = decipher($userinput);
6774: $wasenc=1;
6775: if(!$userinput) { # Cipher not defined.
6776: &Failure($client, "error: Encrypted data without negotated key\n");
6777: return 0;
6778: }
6779: }
6780: Debug("process_request: $userinput\n");
6781:
6782: #
6783: # The 'correct way' to add a command to lond is now to
6784: # write a sub to execute it and Add it to the command dispatch
6785: # hash via a call to register_handler.. The comments to that
6786: # sub should give you enough to go on to show how to do this
6787: # along with the examples that are building up as this code
6788: # is getting refactored. Until all branches of the
6789: # if/elseif monster below have been factored out into
6790: # separate procesor subs, if the dispatch hash is missing
6791: # the command keyword, we will fall through to the remainder
6792: # of the if/else chain below in order to keep this thing in
6793: # working order throughout the transmogrification.
6794:
6795: my ($command, $tail) = split(/:/, $userinput, 2);
6796: chomp($command);
6797: chomp($tail);
6798: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
6799: $command =~ s/(\r)//; # And this too for parameterless commands.
6800: if(!$tail) {
6801: $tail =""; # defined but blank.
6802: }
6803:
6804: &Debug("Command received: $command, encoded = $wasenc");
6805:
6806: if(defined $Dispatcher{$command}) {
6807:
6808: my $dispatch_info = $Dispatcher{$command};
6809: my $handler = $$dispatch_info[0];
6810: my $need_encode = $$dispatch_info[1];
6811: my $client_types = $$dispatch_info[2];
6812: Debug("Matched dispatch hash: mustencode: $need_encode "
6813: ."ClientType $client_types");
6814:
6815: # Validate the request:
6816:
6817: my $ok = 1;
6818: my $requesterprivs = 0;
6819: if(&isClient()) {
6820: $requesterprivs |= $CLIENT_OK;
6821: }
6822: if(&isManager()) {
6823: $requesterprivs |= $MANAGER_OK;
6824: }
6825: if($need_encode && (!$wasenc)) {
6826: Debug("Must encode but wasn't: $need_encode $wasenc");
6827: $ok = 0;
6828: }
6829: if(($client_types & $requesterprivs) == 0) {
6830: Debug("Client not privileged to do this operation");
6831: $ok = 0;
6832: }
6833: if ($ok) {
6834: my $realcommand = $command;
6835: if ($command eq 'querysend') {
6836: my ($query,$rest)=split(/\:/,$tail,2);
6837: $query=~s/\n*$//g;
6838: my @possqueries =
6839: qw(userlog courselog fetchenrollment institutionalphotos usersearch instdirsearch getinstuser getmultinstusers);
6840: if (grep(/^\Q$query\E$/,@possqueries)) {
6841: $command .= '_'.$query;
6842: } elsif ($query eq 'prepare activity log') {
6843: $command .= '_activitylog';
6844: }
6845: }
6846: if (ref($trust{$command}) eq 'HASH') {
6847: my $donechecks;
6848: if ($trust{$command}{'anywhere'}) {
6849: $donechecks = 1;
6850: } elsif ($trust{$command}{'manageronly'}) {
6851: unless (&isManager()) {
6852: $ok = 0;
6853: }
6854: $donechecks = 1;
6855: } elsif ($trust{$command}{'institutiononly'}) {
6856: unless ($clientsameinst) {
6857: $ok = 0;
6858: }
6859: $donechecks = 1;
6860: } elsif ($clientsameinst) {
6861: $donechecks = 1;
6862: }
6863: unless ($donechecks) {
6864: foreach my $rule (keys(%{$trust{$command}})) {
6865: next if ($rule eq 'remote');
6866: if ($trust{$command}{$rule}) {
6867: if ($clientprohibited{$rule}) {
6868: $ok = 0;
6869: } else {
6870: $ok = 1;
6871: $donechecks = 1;
6872: last;
6873: }
6874: }
6875: }
6876: }
6877: unless ($donechecks) {
6878: if ($trust{$command}{'remote'}) {
6879: if ($clientremoteok) {
6880: $ok = 1;
6881: } else {
6882: $ok = 0;
6883: }
6884: }
6885: }
6886: }
6887: $command = $realcommand;
6888: }
6889:
6890: if($ok) {
6891: Debug("Dispatching to handler $command $tail");
6892: my $keep_going = &$handler($command, $tail, $client);
6893: return $keep_going;
6894: } else {
6895: Debug("Refusing to dispatch because client did not match requirements");
6896: Failure($client, "refused\n", $userinput);
6897: return 1;
6898: }
6899: }
6900:
6901: print $client "unknown_cmd\n";
6902: # -------------------------------------------------------------------- complete
6903: Debug("process_request - returning 1");
6904: return 1;
6905: }
6906: #
6907: # Decipher encoded traffic
6908: # Parameters:
6909: # input - Encoded data.
6910: # Returns:
6911: # Decoded data or undef if encryption key was not yet negotiated.
6912: # Implicit input:
6913: # cipher - This global holds the negotiated encryption key.
6914: #
6915: sub decipher {
6916: my ($input) = @_;
6917: my $output = '';
6918:
6919:
6920: if($cipher) {
6921: my($enc, $enclength, $encinput) = split(/:/, $input);
6922: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
6923: $output .=
6924: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
6925: }
6926: return substr($output, 0, $enclength);
6927: } else {
6928: return undef;
6929: }
6930: }
6931:
6932: #
6933: # Register a command processor. This function is invoked to register a sub
6934: # to process a request. Once registered, the ProcessRequest sub can automatically
6935: # dispatch requests to an appropriate sub, and do the top level validity checking
6936: # as well:
6937: # - Is the keyword recognized.
6938: # - Is the proper client type attempting the request.
6939: # - Is the request encrypted if it has to be.
6940: # Parameters:
6941: # $request_name - Name of the request being registered.
6942: # This is the command request that will match
6943: # against the hash keywords to lookup the information
6944: # associated with the dispatch information.
6945: # $procedure - Reference to a sub to call to process the request.
6946: # All subs get called as follows:
6947: # Procedure($cmd, $tail, $replyfd, $key)
6948: # $cmd - the actual keyword that invoked us.
6949: # $tail - the tail of the request that invoked us.
6950: # $replyfd- File descriptor connected to the client
6951: # $must_encode - True if the request must be encoded to be good.
6952: # $client_ok - True if it's ok for a client to request this.
6953: # $manager_ok - True if it's ok for a manager to request this.
6954: # Side effects:
6955: # - On success, the Dispatcher hash has an entry added for the key $RequestName
6956: # - On failure, the program will die as it's a bad internal bug to try to
6957: # register a duplicate command handler.
6958: #
6959: sub register_handler {
6960: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
6961:
6962: # Don't allow duplication#
6963:
6964: if (defined $Dispatcher{$request_name}) {
6965: die "Attempting to define a duplicate request handler for $request_name\n";
6966: }
6967: # Build the client type mask:
6968:
6969: my $client_type_mask = 0;
6970: if($client_ok) {
6971: $client_type_mask |= $CLIENT_OK;
6972: }
6973: if($manager_ok) {
6974: $client_type_mask |= $MANAGER_OK;
6975: }
6976:
6977: # Enter the hash:
6978:
6979: my @entry = ($procedure, $must_encode, $client_type_mask);
6980:
6981: $Dispatcher{$request_name} = \@entry;
6982:
6983: }
6984:
6985:
6986: #------------------------------------------------------------------
6987:
6988:
6989:
6990:
6991: #
6992: # Convert an error return code from lcpasswd to a string value.
6993: #
6994: sub lcpasswdstrerror {
6995: my $ErrorCode = shift;
6996: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
6997: return "lcpasswd Unrecognized error return value ".$ErrorCode;
6998: } else {
6999: return $passwderrors[$ErrorCode];
7000: }
7001: }
7002:
7003: # grabs exception and records it to log before exiting
7004: sub catchexception {
7005: my ($error)=@_;
7006: $SIG{'QUIT'}='DEFAULT';
7007: $SIG{__DIE__}='DEFAULT';
7008: &status("Catching exception");
7009: &logthis("<font color='red'>CRITICAL: "
7010: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
7011: ."a crash with this error msg->[$error]</font>");
7012: &logthis('Famous last words: '.$status.' - '.$lastlog);
7013: if ($client) { print $client "error: $error\n"; }
7014: $server->close();
7015: die($error);
7016: }
7017: sub timeout {
7018: &status("Handling Timeout");
7019: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
7020: &catchexception('Timeout');
7021: }
7022: # -------------------------------- Set signal handlers to record abnormal exits
7023:
7024:
7025: $SIG{'QUIT'}=\&catchexception;
7026: $SIG{__DIE__}=\&catchexception;
7027:
7028: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
7029: &status("Read loncapa.conf and loncapa_apache.conf");
7030: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
7031: %perlvar=%{$perlvarref};
7032: undef $perlvarref;
7033:
7034: # ----------------------------- Make sure this process is running from user=www
7035: my $wwwid=getpwnam('www');
7036: if ($wwwid!=$<) {
7037: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
7038: my $subj="LON: $currenthostid User ID mismatch";
7039: system("echo 'User ID mismatch. lond must be run as user www.' |".
7040: " mail -s '$subj' $emailto > /dev/null");
7041: exit 1;
7042: }
7043:
7044: # --------------------------------------------- Check if other instance running
7045:
7046: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
7047:
7048: if (-e $pidfile) {
7049: my $lfh=IO::File->new("$pidfile");
7050: my $pide=<$lfh>;
7051: chomp($pide);
7052: if (kill 0 => $pide) { die "already running"; }
7053: }
7054:
7055: # ------------------------------------------------------------- Read hosts file
7056:
7057:
7058:
7059: # establish SERVER socket, bind and listen.
7060: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
7061: Type => SOCK_STREAM,
7062: Proto => 'tcp',
7063: ReuseAddr => 1,
7064: Listen => 10 )
7065: or die "making socket: $@\n";
7066:
7067: # --------------------------------------------------------- Do global variables
7068:
7069: # global variables
7070:
7071: my %children = (); # keys are current child process IDs
7072:
7073: sub REAPER { # takes care of dead children
7074: $SIG{CHLD} = \&REAPER;
7075: &status("Handling child death");
7076: my $pid;
7077: do {
7078: $pid = waitpid(-1,&WNOHANG());
7079: if (defined($children{$pid})) {
7080: &logthis("Child $pid died");
7081: delete($children{$pid});
7082: } elsif ($pid > 0) {
7083: &logthis("Unknown Child $pid died");
7084: }
7085: } while ( $pid > 0 );
7086: foreach my $child (keys(%children)) {
7087: $pid = waitpid($child,&WNOHANG());
7088: if ($pid > 0) {
7089: &logthis("Child $child - $pid looks like we missed it's death");
7090: delete($children{$pid});
7091: }
7092: }
7093: &status("Finished Handling child death");
7094: }
7095:
7096: sub HUNTSMAN { # signal handler for SIGINT
7097: &status("Killing children (INT)");
7098: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
7099: kill 'INT' => keys %children;
7100: &logthis("Free socket: ".shutdown($server,2)); # free up socket
7101: my $execdir=$perlvar{'lonDaemons'};
7102: unlink("$execdir/logs/lond.pid");
7103: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
7104: &status("Done killing children");
7105: exit; # clean up with dignity
7106: }
7107:
7108: sub HUPSMAN { # signal handler for SIGHUP
7109: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
7110: &status("Killing children for restart (HUP)");
7111: kill 'INT' => keys %children;
7112: &logthis("Free socket: ".shutdown($server,2)); # free up socket
7113: &logthis("<font color='red'>CRITICAL: Restarting</font>");
7114: my $execdir=$perlvar{'lonDaemons'};
7115: unlink("$execdir/logs/lond.pid");
7116: &status("Restarting self (HUP)");
7117: exec("$execdir/lond"); # here we go again
7118: }
7119:
7120: #
7121: # Reload the Apache daemon's state.
7122: # This is done by invoking /home/httpd/perl/apachereload
7123: # a setuid perl script that can be root for us to do this job.
7124: #
7125: sub ReloadApache {
7126: # --------------------------- Handle case of another apachereload process (locking)
7127: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
7128: my $execdir = $perlvar{'lonDaemons'};
7129: my $script = $execdir."/apachereload";
7130: system($script);
7131: unlink('/tmp/lock_apachereload'); # Remove the lock file.
7132: }
7133: }
7134:
7135: #
7136: # Called in response to a USR2 signal.
7137: # - Reread hosts.tab
7138: # - All children connected to hosts that were removed from hosts.tab
7139: # are killed via SIGINT
7140: # - All children connected to previously existing hosts are sent SIGUSR1
7141: # - Our internal hosts hash is updated to reflect the new contents of
7142: # hosts.tab causing connections from hosts added to hosts.tab to
7143: # now be honored.
7144: #
7145: sub UpdateHosts {
7146: &status("Reload hosts.tab");
7147: logthis('<font color="blue"> Updating connections </font>');
7148: #
7149: # The %children hash has the set of IP's we currently have children
7150: # on. These need to be matched against records in the hosts.tab
7151: # Any ip's no longer in the table get killed off they correspond to
7152: # either dropped or changed hosts. Note that the re-read of the table
7153: # will take care of new and changed hosts as connections come into being.
7154:
7155: &Apache::lonnet::reset_hosts_info();
7156: my %active;
7157:
7158: foreach my $child (keys(%children)) {
7159: my $childip = $children{$child};
7160: if ($childip ne '127.0.0.1'
7161: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
7162: logthis('<font color="blue"> UpdateHosts killing child '
7163: ." $child for ip $childip </font>");
7164: kill('INT', $child);
7165: } else {
7166: $active{$child} = $childip;
7167: logthis('<font color="green"> keeping child for ip '
7168: ." $childip (pid=$child) </font>");
7169: }
7170: }
7171:
7172: my %oldconf = %secureconf;
7173: my %connchange;
7174: if (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') {
7175: logthis('<font color="blue"> Reloaded SSL connection rules and cleared CRL checking history </font>');
7176: } else {
7177: logthis('<font color="yellow"> Failed to reload SSL connection rules and clear CRL checking history </font>');
7178: }
7179: if ((ref($oldconf{'connfrom'}) eq 'HASH') && (ref($secureconf{'connfrom'}) eq 'HASH')) {
7180: foreach my $type ('dom','intdom','other') {
7181: if ((($oldconf{'connfrom'}{$type} eq 'no') && ($secureconf{'connfrom'}{$type} eq 'req')) ||
7182: (($oldconf{'connfrom'}{$type} eq 'req') && ($secureconf{'connfrom'}{$type} eq 'no'))) {
7183: $connchange{$type} = 1;
7184: }
7185: }
7186: }
7187: if (keys(%connchange)) {
7188: foreach my $child (keys(%active)) {
7189: my $childip = $active{$child};
7190: if ($childip ne '127.0.0.1') {
7191: my $childhostname = gethostbyaddr(Socket::inet_aton($childip),AF_INET);
7192: if ($childhostname ne '') {
7193: my $childlonhost = &Apache::lonnet::get_server_homeID($childhostname);
7194: my ($samedom,$sameinst) = &set_client_info($childlonhost);
7195: if ($samedom) {
7196: if ($connchange{'dom'}) {
7197: logthis('<font color="blue"> UpdateHosts killing child '
7198: ." $child for ip $childip </font>");
7199: kill('INT', $child);
7200: }
7201: } elsif ($sameinst) {
7202: if ($connchange{'intdom'}) {
7203: logthis('<font color="blue"> UpdateHosts killing child '
7204: ." $child for ip $childip </font>");
7205: kill('INT', $child);
7206: }
7207: } else {
7208: if ($connchange{'other'}) {
7209: logthis('<font color="blue"> UpdateHosts killing child '
7210: ." $child for ip $childip </font>");
7211: kill('INT', $child);
7212: }
7213: }
7214: }
7215: }
7216: }
7217: }
7218: ReloadApache;
7219: &status("Finished reloading hosts.tab");
7220: }
7221:
7222: sub checkchildren {
7223: &status("Checking on the children (sending signals)");
7224: &initnewstatus();
7225: &logstatus();
7226: &logthis('Going to check on the children');
7227: my $docdir=$perlvar{'lonDocRoot'};
7228: foreach (sort keys %children) {
7229: #sleep 1;
7230: unless (kill 'USR1' => $_) {
7231: &logthis ('Child '.$_.' is dead');
7232: &logstatus($$.' is dead');
7233: delete($children{$_});
7234: }
7235: }
7236: sleep 5;
7237: $SIG{ALRM} = sub { Debug("timeout");
7238: die "timeout"; };
7239: $SIG{__DIE__} = 'DEFAULT';
7240: &status("Checking on the children (waiting for reports)");
7241: foreach (sort keys %children) {
7242: unless (-e "$docdir/lon-status/londchld/$_.txt") {
7243: eval {
7244: alarm(300);
7245: &logthis('Child '.$_.' did not respond');
7246: kill 9 => $_;
7247: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
7248: #$subj="LON: $currenthostid killed lond process $_";
7249: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
7250: #$execdir=$perlvar{'lonDaemons'};
7251: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
7252: delete($children{$_});
7253: alarm(0);
7254: }
7255: }
7256: }
7257: $SIG{ALRM} = 'DEFAULT';
7258: $SIG{__DIE__} = \&catchexception;
7259: &status("Finished checking children");
7260: &logthis('Finished Checking children');
7261: }
7262:
7263: # --------------------------------------------------------------------- Logging
7264:
7265: sub logthis {
7266: my $message=shift;
7267: my $execdir=$perlvar{'lonDaemons'};
7268: my $fh=IO::File->new(">>$execdir/logs/lond.log");
7269: my $now=time;
7270: my $local=localtime($now);
7271: $lastlog=$local.': '.$message;
7272: print $fh "$local ($$): $message\n";
7273: }
7274:
7275: # ------------------------- Conditional log if $DEBUG true.
7276: sub Debug {
7277: my $message = shift;
7278: if($DEBUG) {
7279: &logthis($message);
7280: }
7281: }
7282:
7283: #
7284: # Sub to do replies to client.. this gives a hook for some
7285: # debug tracing too:
7286: # Parameters:
7287: # fd - File open on client.
7288: # reply - Text to send to client.
7289: # request - Original request from client.
7290: #
7291: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
7292: #this is done automatically ($$reply must not contain any \n in this case).
7293: #If $reply is a string the caller has to ensure this.
7294: sub Reply {
7295: my ($fd, $reply, $request) = @_;
7296: if (ref($reply)) {
7297: print $fd $$reply;
7298: print $fd "\n";
7299: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
7300: } else {
7301: print $fd $reply;
7302: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
7303: }
7304: $Transactions++;
7305: }
7306:
7307:
7308: #
7309: # Sub to report a failure.
7310: # This function:
7311: # - Increments the failure statistic counters.
7312: # - Invokes Reply to send the error message to the client.
7313: # Parameters:
7314: # fd - File descriptor open on the client
7315: # reply - Reply text to emit.
7316: # request - The original request message (used by Reply
7317: # to debug if that's enabled.
7318: # Implicit outputs:
7319: # $Failures- The number of failures is incremented.
7320: # Reply (invoked here) sends a message to the
7321: # client:
7322: #
7323: sub Failure {
7324: my $fd = shift;
7325: my $reply = shift;
7326: my $request = shift;
7327:
7328: $Failures++;
7329: Reply($fd, $reply, $request); # That's simple eh?
7330: }
7331: # ------------------------------------------------------------------ Log status
7332:
7333: sub logstatus {
7334: &status("Doing logging");
7335: my $docdir=$perlvar{'lonDocRoot'};
7336: {
7337: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
7338: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
7339: $fh->close();
7340: }
7341: &status("Finished $$.txt");
7342: {
7343: open(LOG,">>$docdir/lon-status/londstatus.txt");
7344: flock(LOG,LOCK_EX);
7345: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
7346: .$status."\t".$lastlog."\t $keymode\n";
7347: flock(LOG,LOCK_UN);
7348: close(LOG);
7349: }
7350: &status("Finished logging");
7351: }
7352:
7353: sub initnewstatus {
7354: my $docdir=$perlvar{'lonDocRoot'};
7355: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
7356: my $now=time();
7357: my $local=localtime($now);
7358: print $fh "LOND status $local - parent $$\n\n";
7359: opendir(DIR,"$docdir/lon-status/londchld");
7360: while (my $filename=readdir(DIR)) {
7361: unlink("$docdir/lon-status/londchld/$filename");
7362: }
7363: closedir(DIR);
7364: }
7365:
7366: # -------------------------------------------------------------- Status setting
7367:
7368: sub status {
7369: my $what=shift;
7370: my $now=time;
7371: my $local=localtime($now);
7372: $status=$local.': '.$what;
7373: $0='lond: '.$what.' '.$local;
7374: }
7375:
7376: # -------------------------------------------------------------- Talk to lonsql
7377:
7378: sub sql_reply {
7379: my ($cmd)=@_;
7380: my $answer=&sub_sql_reply($cmd);
7381: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
7382: return $answer;
7383: }
7384:
7385: sub sub_sql_reply {
7386: my ($cmd)=@_;
7387: my $unixsock="mysqlsock";
7388: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
7389: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
7390: Type => SOCK_STREAM,
7391: Timeout => 10)
7392: or return "con_lost";
7393: print $sclient "$cmd:$currentdomainid\n";
7394: my $answer=<$sclient>;
7395: chomp($answer);
7396: if (!$answer) { $answer="con_lost"; }
7397: return $answer;
7398: }
7399:
7400: # --------------------------------------- Is this the home server of an author?
7401:
7402: sub ishome {
7403: my $author=shift;
7404: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
7405: my ($udom,$uname)=split(/\//,$author);
7406: my $proname=propath($udom,$uname);
7407: if (-e $proname) {
7408: return 'owner';
7409: } else {
7410: return 'not_owner';
7411: }
7412: }
7413:
7414: # ======================================================= Continue main program
7415: # ---------------------------------------------------- Fork once and dissociate
7416:
7417: my $fpid=fork;
7418: exit if $fpid;
7419: die "Couldn't fork: $!" unless defined ($fpid);
7420:
7421: POSIX::setsid() or die "Can't start new session: $!";
7422:
7423: # ------------------------------------------------------- Write our PID on disk
7424:
7425: my $execdir=$perlvar{'lonDaemons'};
7426: open (PIDSAVE,">$execdir/logs/lond.pid");
7427: print PIDSAVE "$$\n";
7428: close(PIDSAVE);
7429: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
7430: &status('Starting');
7431:
7432:
7433:
7434: # ----------------------------------------------------- Install signal handlers
7435:
7436:
7437: $SIG{CHLD} = \&REAPER;
7438: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7439: $SIG{HUP} = \&HUPSMAN;
7440: $SIG{USR1} = \&checkchildren;
7441: $SIG{USR2} = \&UpdateHosts;
7442:
7443: # Read the host hashes:
7444: &Apache::lonnet::load_hosts_tab();
7445: my %iphost = &Apache::lonnet::get_iphost(1);
7446:
7447: $dist=`$perlvar{'lonDaemons'}/distprobe`;
7448:
7449: my $arch = `uname -i`;
7450: chomp($arch);
7451: if ($arch eq 'unknown') {
7452: $arch = `uname -m`;
7453: chomp($arch);
7454: }
7455:
7456: unless (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') {
7457: &logthis('<font color="blue">No connectionrules table. Will fallback to loncapa.conf</font>');
7458: }
7459:
7460: # --------------------------------------------------------------
7461: # Accept connections. When a connection comes in, it is validated
7462: # and if good, a child process is created to process transactions
7463: # along the connection.
7464:
7465: while (1) {
7466: &status('Starting accept');
7467: $client = $server->accept() or next;
7468: &status('Accepted '.$client.' off to spawn');
7469: make_new_child($client);
7470: &status('Finished spawning');
7471: }
7472:
7473: sub make_new_child {
7474: my $pid;
7475: # my $cipher; # Now global
7476: my $sigset;
7477:
7478: $client = shift;
7479: &status('Starting new child '.$client);
7480: &logthis('<font color="green"> Attempting to start child ('.$client.
7481: ")</font>");
7482: # block signal for fork
7483: $sigset = POSIX::SigSet->new(SIGINT);
7484: sigprocmask(SIG_BLOCK, $sigset)
7485: or die "Can't block SIGINT for fork: $!\n";
7486:
7487: die "fork: $!" unless defined ($pid = fork);
7488:
7489: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
7490: # connection liveness.
7491:
7492: #
7493: # Figure out who we're talking to so we can record the peer in
7494: # the pid hash.
7495: #
7496: my $caller = getpeername($client);
7497: my ($port,$iaddr);
7498: if (defined($caller) && length($caller) > 0) {
7499: ($port,$iaddr)=unpack_sockaddr_in($caller);
7500: } else {
7501: &logthis("Unable to determine who caller was, getpeername returned nothing");
7502: }
7503: if (defined($iaddr)) {
7504: $clientip = inet_ntoa($iaddr);
7505: Debug("Connected with $clientip");
7506: } else {
7507: &logthis("Unable to determine clientip");
7508: $clientip='Unavailable';
7509: }
7510:
7511: if ($pid) {
7512: # Parent records the child's birth and returns.
7513: sigprocmask(SIG_UNBLOCK, $sigset)
7514: or die "Can't unblock SIGINT for fork: $!\n";
7515: $children{$pid} = $clientip;
7516: &status('Started child '.$pid);
7517: close($client);
7518: return;
7519: } else {
7520: # Child can *not* return from this subroutine.
7521: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
7522: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
7523: #don't get intercepted
7524: $SIG{USR1}= \&logstatus;
7525: $SIG{ALRM}= \&timeout;
7526: #
7527: # Block sigpipe as it gets thrownon socket disconnect and we want to
7528: # deal with that as a read faiure instead.
7529: #
7530: my $blockset = POSIX::SigSet->new(SIGPIPE);
7531: sigprocmask(SIG_BLOCK, $blockset);
7532:
7533: $lastlog='Forked ';
7534: $status='Forked';
7535:
7536: # unblock signals
7537: sigprocmask(SIG_UNBLOCK, $sigset)
7538: or die "Can't unblock SIGINT for fork: $!\n";
7539:
7540: # my $tmpsnum=0; # Now global
7541: #---------------------------------------------------- kerberos 5 initialization
7542: &Authen::Krb5::init_context();
7543:
7544: my $no_ets;
7545: if ($dist =~ /^(?:centos|rhes|scientific|oracle)(\d+)$/) {
7546: if ($1 >= 7) {
7547: $no_ets = 1;
7548: }
7549: } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
7550: if (($1 eq '9.3') || ($1 >= 12.2)) {
7551: $no_ets = 1;
7552: }
7553: } elsif ($dist =~ /^sles(\d+)$/) {
7554: if ($1 > 11) {
7555: $no_ets = 1;
7556: }
7557: } elsif ($dist =~ /^fedora(\d+)$/) {
7558: if ($1 < 7) {
7559: $no_ets = 1;
7560: }
7561: }
7562: unless ($no_ets) {
7563: &Authen::Krb5::init_ets();
7564: }
7565:
7566: &status('Accepted connection');
7567: # =============================================================================
7568: # do something with the connection
7569: # -----------------------------------------------------------------------------
7570: # see if we know client and 'check' for spoof IP by ineffective challenge
7571:
7572: my $outsideip=$clientip;
7573: if ($clientip eq '127.0.0.1') {
7574: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
7575: }
7576: &ReadManagerTable();
7577: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
7578: my $ismanager=($managers{$outsideip} ne undef);
7579: $clientname = "[unknown]";
7580: if($clientrec) { # Establish client type.
7581: $ConnectionType = "client";
7582: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
7583: if($ismanager) {
7584: $ConnectionType = "both";
7585: }
7586: } else {
7587: $ConnectionType = "manager";
7588: $clientname = $managers{$outsideip};
7589: }
7590: my $clientok;
7591:
7592: if ($clientrec || $ismanager) {
7593: &status("Waiting for init from $clientip $clientname");
7594: &logthis('<font color="yellow">INFO: Connection, '.
7595: $clientip.
7596: " ($clientname) connection type = $ConnectionType </font>" );
7597: &status("Connecting $clientip ($clientname))");
7598: my $remotereq=<$client>;
7599: chomp($remotereq);
7600: Debug("Got init: $remotereq");
7601:
7602: if ($remotereq =~ /^init/) {
7603: &sethost("sethost:$perlvar{'lonHostID'}");
7604: #
7605: # If the remote is attempting a local init... give that a try:
7606: #
7607: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
7608: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
7609: # version when initiating the connection. For LON-CAPA 2.8 and older,
7610: # the version is retrieved from the global %loncaparevs in lonnet.pm.
7611: # $clientversion contains path to keyfile if $inittype eq 'local'
7612: # it's overridden below in this case
7613: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
7614:
7615: # If the connection type is ssl, but I didn't get my
7616: # certificate files yet, then I'll drop back to
7617: # insecure (if allowed).
7618:
7619: if ($inittype eq "ssl") {
7620: my $context;
7621: if ($clientsamedom) {
7622: $context = 'dom';
7623: if ($secureconf{'connfrom'}{'dom'} eq 'no') {
7624: $inittype = "";
7625: }
7626: } elsif ($clientsameinst) {
7627: $context = 'intdom';
7628: if ($secureconf{'connfrom'}{'intdom'} eq 'no') {
7629: $inittype = "";
7630: }
7631: } else {
7632: $context = 'other';
7633: if ($secureconf{'connfrom'}{'other'} eq 'no') {
7634: $inittype = "";
7635: }
7636: }
7637: if ($inittype eq '') {
7638: &logthis("<font color=\"blue\"> Domain config set "
7639: ."to no ssl for $clientname (context: $context)"
7640: ." -- trying insecure auth</font>");
7641: }
7642: }
7643:
7644: if($inittype eq "ssl") {
7645: my ($ca, $cert) = lonssl::CertificateFile;
7646: my $kfile = lonssl::KeyFile;
7647: if((!$ca) ||
7648: (!$cert) ||
7649: (!$kfile)) {
7650: $inittype = ""; # This forces insecure attempt.
7651: &logthis("<font color=\"blue\"> Certificates not "
7652: ."installed -- trying insecure auth</font>");
7653: } else { # SSL certificates are in place so
7654: } # Leave the inittype alone.
7655: }
7656:
7657: if($inittype eq "local") {
7658: $clientversion = $perlvar{'lonVersion'};
7659: my $key = LocalConnection($client, $remotereq);
7660: if($key) {
7661: Debug("Got local key $key");
7662: $clientok = 1;
7663: my $cipherkey = pack("H32", $key);
7664: $cipher = new IDEA($cipherkey);
7665: print $client "ok:local\n";
7666: &logthis('<font color="green">'
7667: . "Successful local authentication </font>");
7668: $keymode = "local"
7669: } else {
7670: Debug("Failed to get local key");
7671: $clientok = 0;
7672: shutdown($client, 3);
7673: close $client;
7674: }
7675: } elsif ($inittype eq "ssl") {
7676: my $key = SSLConnection($client,$clientname);
7677: if ($key) {
7678: $clientok = 1;
7679: my $cipherkey = pack("H32", $key);
7680: $cipher = new IDEA($cipherkey);
7681: &logthis('<font color="green">'
7682: ."Successfull ssl authentication with $clientname </font>");
7683: $keymode = "ssl";
7684:
7685: } else {
7686: $clientok = 0;
7687: close $client;
7688: }
7689:
7690: } else {
7691: my $ok = InsecureConnection($client);
7692: if($ok) {
7693: $clientok = 1;
7694: &logthis('<font color="green">'
7695: ."Successful insecure authentication with $clientname </font>");
7696: print $client "ok\n";
7697: $keymode = "insecure";
7698: } else {
7699: &logthis('<font color="yellow">'
7700: ."Attempted insecure connection disallowed </font>");
7701: close $client;
7702: $clientok = 0;
7703: }
7704: }
7705: } else {
7706: &logthis(
7707: "<font color='blue'>WARNING: "
7708: ."$clientip failed to initialize: >$remotereq< </font>");
7709: &status('No init '.$clientip);
7710: }
7711: } else {
7712: &logthis(
7713: "<font color='blue'>WARNING: Unknown client $clientip</font>");
7714: &status('Hung up on '.$clientip);
7715: }
7716:
7717: if ($clientok) {
7718: # ---------------- New known client connecting, could mean machine online again
7719: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
7720: && $clientip ne '127.0.0.1') {
7721: &Apache::lonnet::reconlonc($clientname);
7722: }
7723: &logthis("<font color='green'>Established connection: $clientname</font>");
7724: &status('Will listen to '.$clientname);
7725: # ------------------------------------------------------------ Process requests
7726: my $keep_going = 1;
7727: my $user_input;
7728:
7729: while(($user_input = get_request) && $keep_going) {
7730: alarm(120);
7731: Debug("Main: Got $user_input\n");
7732: $keep_going = &process_request($user_input);
7733: alarm(0);
7734: &status('Listening to '.$clientname." ($keymode)");
7735: }
7736:
7737: # --------------------------------------------- client unknown or fishy, refuse
7738: } else {
7739: print $client "refused\n";
7740: $client->close();
7741: &logthis("<font color='blue'>WARNING: "
7742: ."Rejected client $clientip, closing connection</font>");
7743: }
7744: }
7745:
7746: # =============================================================================
7747:
7748: &logthis("<font color='red'>CRITICAL: "
7749: ."Disconnect from $clientip ($clientname)</font>");
7750:
7751:
7752: # this exit is VERY important, otherwise the child will become
7753: # a producer of more and more children, forking yourself into
7754: # process death.
7755: exit;
7756:
7757: }
7758:
7759: #
7760: # Used to determine if a particular client is from the same domain
7761: # as the current server, or from the same internet domain, and
7762: # also if the client can host sessions for the domain's users.
7763: # A hash is populated with keys set to commands sent by the client
7764: # which may not be executed for this domain.
7765: #
7766: # Optional input -- the client to check for domain and internet domain.
7767: # If not specified, defaults to the package variable: $clientname
7768: #
7769: # If called in array context will not set package variables, but will
7770: # instead return an array of two values - (a) true if client is in the
7771: # same domain as the server, and (b) true if client is in the same
7772: # internet domain.
7773: #
7774: # If called in scalar context, sets package variables for current client:
7775: #
7776: # $clienthomedom - LonCAPA domain of homeID for client.
7777: # $clientsamedom - LonCAPA domain same for this host and client.
7778: # $clientintdom - LonCAPA "internet domain" for client.
7779: # $clientsameinst - LonCAPA "internet domain" same for this host & client.
7780: # $clientremoteok - If current domain permits hosting on this client: 1
7781: # %clientprohibited - Commands prohibited for domain's users for this client.
7782: #
7783: # if the host and client have the same "internet domain", then the value
7784: # of $clientremoteok is not used, and no commands are prohibited.
7785: #
7786: # returns 1 to indicate package variables have been set for current client.
7787: #
7788:
7789: sub set_client_info {
7790: my ($lonhost) = @_;
7791: $lonhost ||= $clientname;
7792: my $clienthost = &Apache::lonnet::hostname($lonhost);
7793: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
7794: my $homedom = &Apache::lonnet::host_domain($clientserverhomeID);
7795: my $samedom = 0;
7796: if ($perlvar{'lonDefDomain'} eq $homedom) {
7797: $samedom = 1;
7798: }
7799: my $intdom = &Apache::lonnet::internet_dom($clientserverhomeID);
7800: my $sameinst = 0;
7801: if ($intdom ne '') {
7802: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
7803: if (ref($internet_names) eq 'ARRAY') {
7804: if (grep(/^\Q$intdom\E$/,@{$internet_names})) {
7805: $sameinst = 1;
7806: }
7807: }
7808: }
7809: if (wantarray) {
7810: return ($samedom,$sameinst);
7811: } else {
7812: $clienthomedom = $homedom;
7813: $clientsamedom = $samedom;
7814: $clientintdom = $intdom;
7815: $clientsameinst = $sameinst;
7816: if ($clientsameinst) {
7817: undef($clientremoteok);
7818: undef(%clientprohibited);
7819: } else {
7820: $clientremoteok = &get_remote_hostable($currentdomainid);
7821: %clientprohibited = &get_prohibited($currentdomainid);
7822: }
7823: return 1;
7824: }
7825: }
7826:
7827: #
7828: # Determine if a user is an author for the indicated domain.
7829: #
7830: # Parameters:
7831: # domain - domain to check in .
7832: # user - Name of user to check.
7833: #
7834: # Return:
7835: # 1 - User is an author for domain.
7836: # 0 - User is not an author for domain.
7837: sub is_author {
7838: my ($domain, $user) = @_;
7839:
7840: &Debug("is_author: $user @ $domain");
7841:
7842: my $hashref = &tie_user_hash($domain, $user, "roles",
7843: &GDBM_READER());
7844:
7845: # Author role should show up as a key /domain/_au
7846:
7847: my $value;
7848: if ($hashref) {
7849:
7850: my $key = "/$domain/_au";
7851: if (defined($hashref)) {
7852: $value = $hashref->{$key};
7853: if(!untie_user_hash($hashref)) {
7854: return 'error: ' . ($!+0)." untie (GDBM) Failed";
7855: }
7856: }
7857:
7858: if(defined($value)) {
7859: &Debug("$user @ $domain is an author");
7860: }
7861: } else {
7862: return 'error: '.($!+0)." tie (GDBM) Failed";
7863: }
7864:
7865: return defined($value);
7866: }
7867: #
7868: # Checks to see if the input roleput request was to set
7869: # an author role. If so, creates construction space
7870: # Parameters:
7871: # request - The request sent to the rolesput subchunk.
7872: # We're looking for /domain/_au
7873: # domain - The domain in which the user is having roles doctored.
7874: # user - Name of the user for which the role is being put.
7875: # authtype - The authentication type associated with the user.
7876: #
7877: sub manage_permissions {
7878: my ($request, $domain, $user, $authtype) = @_;
7879: # See if the request is of the form /$domain/_au
7880: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
7881: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
7882: unless (-e $path) {
7883: mkdir($path);
7884: }
7885: unless (-e $path.'/'.$user) {
7886: mkdir($path.'/'.$user);
7887: }
7888: }
7889: }
7890:
7891:
7892: #
7893: # Return the full path of a user password file, whether it exists or not.
7894: # Parameters:
7895: # domain - Domain in which the password file lives.
7896: # user - name of the user.
7897: # Returns:
7898: # Full passwd path:
7899: #
7900: sub password_path {
7901: my ($domain, $user) = @_;
7902: return &propath($domain, $user).'/passwd';
7903: }
7904:
7905: # Password Filename
7906: # Returns the path to a passwd file given domain and user... only if
7907: # it exists.
7908: # Parameters:
7909: # domain - Domain in which to search.
7910: # user - username.
7911: # Returns:
7912: # - If the password file exists returns its path.
7913: # - If the password file does not exist, returns undefined.
7914: #
7915: sub password_filename {
7916: my ($domain, $user) = @_;
7917:
7918: Debug ("PasswordFilename called: dom = $domain user = $user");
7919:
7920: my $path = &password_path($domain, $user);
7921: Debug("PasswordFilename got path: $path");
7922: if(-e $path) {
7923: return $path;
7924: } else {
7925: return undef;
7926: }
7927: }
7928:
7929: #
7930: # Rewrite the contents of the user's passwd file.
7931: # Parameters:
7932: # domain - domain of the user.
7933: # name - User's name.
7934: # contents - New contents of the file.
7935: # saveold - (optional). If true save old file in a passwd.bak file.
7936: # Returns:
7937: # 0 - Failed.
7938: # 1 - Success.
7939: #
7940: sub rewrite_password_file {
7941: my ($domain, $user, $contents, $saveold) = @_;
7942:
7943: my $file = &password_filename($domain, $user);
7944: if (defined $file) {
7945: if ($saveold) {
7946: my $bakfile = $file.'.bak';
7947: if (CopyFile($file,$bakfile)) {
7948: chmod(0400,$bakfile);
7949: &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain");
7950: } else {
7951: &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain");
7952: }
7953: }
7954: my $pf = IO::File->new(">$file");
7955: if($pf) {
7956: print $pf "$contents\n";
7957: return 1;
7958: } else {
7959: return 0;
7960: }
7961: } else {
7962: return 0;
7963: }
7964:
7965: }
7966:
7967: #
7968: # get_auth_type - Determines the authorization type of a user in a domain.
7969:
7970: # Returns the authorization type or nouser if there is no such user.
7971: #
7972: sub get_auth_type {
7973: my ($domain, $user) = @_;
7974:
7975: Debug("get_auth_type( $domain, $user ) \n");
7976: my $proname = &propath($domain, $user);
7977: my $passwdfile = "$proname/passwd";
7978: if( -e $passwdfile ) {
7979: my $pf = IO::File->new($passwdfile);
7980: my $realpassword = <$pf>;
7981: chomp($realpassword);
7982: Debug("Password info = $realpassword\n");
7983: my ($authtype, $contentpwd) = split(/:/, $realpassword);
7984: Debug("Authtype = $authtype, content = $contentpwd\n");
7985: return "$authtype:$contentpwd";
7986: } else {
7987: Debug("Returning nouser");
7988: return "nouser";
7989: }
7990: }
7991:
7992: #
7993: # Validate a user given their domain, name and password. This utility
7994: # function is used by both AuthenticateHandler and ChangePasswordHandler
7995: # to validate the login credentials of a user.
7996: # Parameters:
7997: # $domain - The domain being logged into (this is required due to
7998: # the capability for multihomed systems.
7999: # $user - The name of the user being validated.
8000: # $password - The user's propoposed password.
8001: #
8002: # Returns:
8003: # 1 - The domain,user,pasword triplet corresponds to a valid
8004: # user.
8005: # 0 - The domain,user,password triplet is not a valid user.
8006: #
8007: sub validate_user {
8008: my ($domain, $user, $password, $checkdefauth) = @_;
8009:
8010: # Why negative ~pi you may well ask? Well this function is about
8011: # authentication, and therefore very important to get right.
8012: # I've initialized the flag that determines whether or not I've
8013: # validated correctly to a value it's not supposed to get.
8014: # At the end of this function. I'll ensure that it's not still that
8015: # value so we don't just wind up returning some accidental value
8016: # as a result of executing an unforseen code path that
8017: # did not set $validated. At the end of valid execution paths,
8018: # validated shoule be 1 for success or 0 for failuer.
8019:
8020: my $validated = -3.14159;
8021:
8022: # How we authenticate is determined by the type of authentication
8023: # the user has been assigned. If the authentication type is
8024: # "nouser", the user does not exist so we will return 0.
8025:
8026: my $contents = &get_auth_type($domain, $user);
8027: my ($howpwd, $contentpwd) = split(/:/, $contents);
8028:
8029: my $null = pack("C",0); # Used by kerberos auth types.
8030:
8031: if ($howpwd eq 'nouser') {
8032: if ($checkdefauth) {
8033: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
8034: if ($domdefaults{'auth_def'} eq 'localauth') {
8035: $howpwd = $domdefaults{'auth_def'};
8036: $contentpwd = $domdefaults{'auth_arg_def'};
8037: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
8038: ($domdefaults{'auth_def'} eq 'krb5')) &&
8039: ($domdefaults{'auth_arg_def'} ne '')) {
8040: $howpwd = $domdefaults{'auth_def'};
8041: $contentpwd = $domdefaults{'auth_arg_def'};
8042: }
8043: }
8044: }
8045: if ($howpwd ne 'nouser') {
8046: if($howpwd eq "internal") { # Encrypted is in local password file.
8047: if (length($contentpwd) == 13) {
8048: $validated = (crypt($password,$contentpwd) eq $contentpwd);
8049: if ($validated) {
8050: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
8051: if ($domdefaults{'intauth_switch'}) {
8052: my $ncpass = &hash_passwd($domain,$password);
8053: my $saveold;
8054: if ($domdefaults{'intauth_switch'} == 2) {
8055: $saveold = 1;
8056: }
8057: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) {
8058: &update_passwd_history($user,$domain,$howpwd,'conversion');
8059: &logthis("Validated password hashed with bcrypt for $user:$domain");
8060: }
8061: }
8062: }
8063: } else {
8064: $validated = &check_internal_passwd($password,$contentpwd,$domain,$user);
8065: }
8066: }
8067: elsif ($howpwd eq "unix") { # User is a normal unix user.
8068: $contentpwd = (getpwnam($user))[1];
8069: if($contentpwd) {
8070: if($contentpwd eq 'x') { # Shadow password file...
8071: my $pwauth_path = "/usr/local/sbin/pwauth";
8072: open PWAUTH, "|$pwauth_path" or
8073: die "Cannot invoke authentication";
8074: print PWAUTH "$user\n$password\n";
8075: close PWAUTH;
8076: $validated = ! $?;
8077:
8078: } else { # Passwords in /etc/passwd.
8079: $validated = (crypt($password,
8080: $contentpwd) eq $contentpwd);
8081: }
8082: } else {
8083: $validated = 0;
8084: }
8085: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
8086: my $checkwithkrb5 = 0;
8087: if ($dist =~/^fedora(\d+)$/) {
8088: if ($1 > 11) {
8089: $checkwithkrb5 = 1;
8090: }
8091: } elsif ($dist =~ /^suse([\d.]+)$/) {
8092: if ($1 > 11.1) {
8093: $checkwithkrb5 = 1;
8094: }
8095: }
8096: if ($checkwithkrb5) {
8097: $validated = &krb5_authen($password,$null,$user,$contentpwd);
8098: } else {
8099: $validated = &krb4_authen($password,$null,$user,$contentpwd);
8100: }
8101: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
8102: $validated = &krb5_authen($password,$null,$user,$contentpwd);
8103: } elsif ($howpwd eq "localauth") {
8104: # Authenticate via installation specific authentcation method:
8105: $validated = &localauth::localauth($user,
8106: $password,
8107: $contentpwd,
8108: $domain);
8109: if ($validated < 0) {
8110: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
8111: $validated = 0;
8112: }
8113: } else { # Unrecognized auth is also bad.
8114: $validated = 0;
8115: }
8116: } else {
8117: $validated = 0;
8118: }
8119: #
8120: # $validated has the correct stat of the authentication:
8121: #
8122:
8123: unless ($validated != -3.14159) {
8124: # I >really really< want to know if this happens.
8125: # since it indicates that user authentication is badly
8126: # broken in some code path.
8127: #
8128: die "ValidateUser - failed to set the value of validated $domain, $user $password";
8129: }
8130: return $validated;
8131: }
8132:
8133: sub check_internal_passwd {
8134: my ($plainpass,$stored,$domain,$user) = @_;
8135: my (undef,$method,@rest) = split(/!/,$stored);
8136: if ($method eq 'bcrypt') {
8137: my $result = &hash_passwd($domain,$plainpass,@rest);
8138: if ($result ne $stored) {
8139: return 0;
8140: }
8141: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
8142: if ($domdefaults{'intauth_check'}) {
8143: # Upgrade to a larger number of rounds if necessary
8144: my $defaultcost = $domdefaults{'intauth_cost'};
8145: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
8146: $defaultcost = 10;
8147: }
8148: if (int($rest[0])<int($defaultcost)) {
8149: if ($domdefaults{'intauth_check'} == 1) {
8150: my $ncpass = &hash_passwd($domain,$plainpass);
8151: if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
8152: &update_passwd_history($user,$domain,'internal','update cost');
8153: &logthis("Validated password hashed with bcrypt for $user:$domain");
8154: }
8155: return 1;
8156: } elsif ($domdefaults{'intauth_check'} == 2) {
8157: return 0;
8158: }
8159: }
8160: } else {
8161: return 1;
8162: }
8163: }
8164: return 0;
8165: }
8166:
8167: sub get_last_authchg {
8168: my ($domain,$user) = @_;
8169: my $lastmod;
8170: my $logname = &propath($domain,$user).'/passwd.log';
8171: if (-e "$logname") {
8172: $lastmod = (stat("$logname"))[9];
8173: }
8174: return $lastmod;
8175: }
8176:
8177: sub krb4_authen {
8178: my ($password,$null,$user,$contentpwd) = @_;
8179: my $validated = 0;
8180: if (!($password =~ /$null/) ) { # Null password not allowed.
8181: eval {
8182: require Authen::Krb4;
8183: };
8184: if (!$@) {
8185: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
8186: "",
8187: $contentpwd,,
8188: 'krbtgt',
8189: $contentpwd,
8190: 1,
8191: $password);
8192: if(!$k4error) {
8193: $validated = 1;
8194: } else {
8195: $validated = 0;
8196: &logthis('krb4: '.$user.', '.$contentpwd.', '.
8197: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
8198: }
8199: } else {
8200: $validated = krb5_authen($password,$null,$user,$contentpwd);
8201: }
8202: }
8203: return $validated;
8204: }
8205:
8206: sub krb5_authen {
8207: my ($password,$null,$user,$contentpwd) = @_;
8208: my $validated = 0;
8209: if(!($password =~ /$null/)) { # Null password not allowed.
8210: my $krbclient = &Authen::Krb5::parse_name($user.'@'
8211: .$contentpwd);
8212: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
8213: my $krbserver = &Authen::Krb5::parse_name($krbservice);
8214: my $credentials= &Authen::Krb5::cc_default();
8215: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
8216: .$contentpwd));
8217: my $krbreturn;
8218: if (exists(&Authen::Krb5::get_init_creds_password)) {
8219: $krbreturn =
8220: &Authen::Krb5::get_init_creds_password($krbclient,$password,
8221: $krbservice);
8222: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
8223: } else {
8224: $krbreturn =
8225: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
8226: $password,$credentials);
8227: $validated = ($krbreturn == 1);
8228: }
8229: if (!$validated) {
8230: &logthis('krb5: '.$user.', '.$contentpwd.', '.
8231: &Authen::Krb5::error());
8232: }
8233: }
8234: return $validated;
8235: }
8236:
8237: sub addline {
8238: my ($fname,$hostid,$ip,$newline)=@_;
8239: my $contents;
8240: my $found=0;
8241: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
8242: my $sh;
8243: if ($sh=IO::File->new("$fname.subscription")) {
8244: while (my $subline=<$sh>) {
8245: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
8246: }
8247: $sh->close();
8248: }
8249: $sh=IO::File->new(">$fname.subscription");
8250: if ($contents) { print $sh $contents; }
8251: if ($newline) { print $sh $newline; }
8252: $sh->close();
8253: return $found;
8254: }
8255:
8256: sub get_chat {
8257: my ($cdom,$cname,$udom,$uname,$group)=@_;
8258:
8259: my @entries=();
8260: my $namespace = 'nohist_chatroom';
8261: my $namespace_inroom = 'nohist_inchatroom';
8262: if ($group ne '') {
8263: $namespace .= '_'.$group;
8264: $namespace_inroom .= '_'.$group;
8265: }
8266: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
8267: &GDBM_READER());
8268: if ($hashref) {
8269: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
8270: &untie_user_hash($hashref);
8271: }
8272: my @participants=();
8273: my $cutoff=time-60;
8274: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
8275: &GDBM_WRCREAT());
8276: if ($hashref) {
8277: $hashref->{$uname.':'.$udom}=time;
8278: foreach my $user (sort(keys(%$hashref))) {
8279: if ($hashref->{$user}>$cutoff) {
8280: push(@participants, 'active_participant:'.$user);
8281: }
8282: }
8283: &untie_user_hash($hashref);
8284: }
8285: return (@participants,@entries);
8286: }
8287:
8288: sub chat_add {
8289: my ($cdom,$cname,$newchat,$group)=@_;
8290: my @entries=();
8291: my $time=time;
8292: my $namespace = 'nohist_chatroom';
8293: my $logfile = 'chatroom.log';
8294: if ($group ne '') {
8295: $namespace .= '_'.$group;
8296: $logfile = 'chatroom_'.$group.'.log';
8297: }
8298: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
8299: &GDBM_WRCREAT());
8300: if ($hashref) {
8301: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
8302: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
8303: my ($thentime,$idnum)=split(/\_/,$lastid);
8304: my $newid=$time.'_000000';
8305: if ($thentime==$time) {
8306: $idnum=~s/^0+//;
8307: $idnum++;
8308: $idnum=substr('000000'.$idnum,-6,6);
8309: $newid=$time.'_'.$idnum;
8310: }
8311: $hashref->{$newid}=$newchat;
8312: my $expired=$time-3600;
8313: foreach my $comment (keys(%$hashref)) {
8314: my ($thistime) = ($comment=~/(\d+)\_/);
8315: if ($thistime<$expired) {
8316: delete $hashref->{$comment};
8317: }
8318: }
8319: {
8320: my $proname=&propath($cdom,$cname);
8321: if (open(CHATLOG,">>$proname/$logfile")) {
8322: print CHATLOG ("$time:".&unescape($newchat)."\n");
8323: }
8324: close(CHATLOG);
8325: }
8326: &untie_user_hash($hashref);
8327: }
8328: }
8329:
8330: sub unsub {
8331: my ($fname,$clientip)=@_;
8332: my $result;
8333: my $unsubs = 0; # Number of successful unsubscribes:
8334:
8335:
8336: # An old way subscriptions were handled was to have a
8337: # subscription marker file:
8338:
8339: Debug("Attempting unlink of $fname.$clientname");
8340: if (unlink("$fname.$clientname")) {
8341: $unsubs++; # Successful unsub via marker file.
8342: }
8343:
8344: # The more modern way to do it is to have a subscription list
8345: # file:
8346:
8347: if (-e "$fname.subscription") {
8348: my $found=&addline($fname,$clientname,$clientip,'');
8349: if ($found) {
8350: $unsubs++;
8351: }
8352: }
8353:
8354: # If either or both of these mechanisms succeeded in unsubscribing a
8355: # resource we can return ok:
8356:
8357: if($unsubs) {
8358: $result = "ok\n";
8359: } else {
8360: $result = "not_subscribed\n";
8361: }
8362:
8363: return $result;
8364: }
8365:
8366: sub currentversion {
8367: my $fname=shift;
8368: my $version=-1;
8369: my $ulsdir='';
8370: if ($fname=~/^(.+)\/[^\/]+$/) {
8371: $ulsdir=$1;
8372: }
8373: my ($fnamere1,$fnamere2);
8374: # remove version if already specified
8375: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
8376: # get the bits that go before and after the version number
8377: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
8378: $fnamere1=$1;
8379: $fnamere2='.'.$2;
8380: }
8381: if (-e $fname) { $version=1; }
8382: if (-e $ulsdir) {
8383: if(-d $ulsdir) {
8384: if (opendir(LSDIR,$ulsdir)) {
8385: my $ulsfn;
8386: while ($ulsfn=readdir(LSDIR)) {
8387: # see if this is a regular file (ignore links produced earlier)
8388: my $thisfile=$ulsdir.'/'.$ulsfn;
8389: unless (-l $thisfile) {
8390: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
8391: if ($1>$version) { $version=$1; }
8392: }
8393: }
8394: }
8395: closedir(LSDIR);
8396: $version++;
8397: }
8398: }
8399: }
8400: return $version;
8401: }
8402:
8403: sub thisversion {
8404: my $fname=shift;
8405: my $version=-1;
8406: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
8407: $version=$1;
8408: }
8409: return $version;
8410: }
8411:
8412: sub subscribe {
8413: my ($userinput,$clientip)=@_;
8414: my $result;
8415: my ($cmd,$fname)=split(/:/,$userinput,2);
8416: my $ownership=&ishome($fname);
8417: if ($ownership eq 'owner') {
8418: # explitly asking for the current version?
8419: unless (-e $fname) {
8420: my $currentversion=¤tversion($fname);
8421: if (&thisversion($fname)==$currentversion) {
8422: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
8423: my $root=$1;
8424: my $extension=$2;
8425: symlink($root.'.'.$extension,
8426: $root.'.'.$currentversion.'.'.$extension);
8427: unless ($extension=~/\.meta$/) {
8428: symlink($root.'.'.$extension.'.meta',
8429: $root.'.'.$currentversion.'.'.$extension.'.meta');
8430: }
8431: }
8432: }
8433: }
8434: if (-e $fname) {
8435: if (-d $fname) {
8436: $result="directory\n";
8437: } else {
8438: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
8439: my $now=time;
8440: my $found=&addline($fname,$clientname,$clientip,
8441: "$clientname:$clientip:$now\n");
8442: if ($found) { $result="$fname\n"; }
8443: # if they were subscribed to only meta data, delete that
8444: # subscription, when you subscribe to a file you also get
8445: # the metadata
8446: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
8447: $fname=~s/\/home\/httpd\/html\/res/raw/;
8448: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
8449: $protocol = 'http' if ($protocol ne 'https');
8450: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
8451: $result="$fname\n";
8452: }
8453: } else {
8454: $result="not_found\n";
8455: }
8456: } else {
8457: $result="rejected\n";
8458: }
8459: return $result;
8460: }
8461: # Change the passwd of a unix user. The caller must have
8462: # first verified that the user is a loncapa user.
8463: #
8464: # Parameters:
8465: # user - Unix user name to change.
8466: # pass - New password for the user.
8467: # Returns:
8468: # ok - if success
8469: # other - Some meaningfule error message string.
8470: # NOTE:
8471: # invokes a setuid script to change the passwd.
8472: sub change_unix_password {
8473: my ($user, $pass) = @_;
8474:
8475: &Debug("change_unix_password");
8476: my $execdir=$perlvar{'lonDaemons'};
8477: &Debug("Opening lcpasswd pipeline");
8478: my $pf = IO::File->new("|$execdir/lcpasswd > "
8479: ."$perlvar{'lonDaemons'}"
8480: ."/logs/lcpasswd.log");
8481: print $pf "$user\n$pass\n$pass\n";
8482: close $pf;
8483: my $err = $?;
8484: return ($err < @passwderrors) ? $passwderrors[$err] :
8485: "pwchange_falure - unknown error";
8486:
8487:
8488: }
8489:
8490:
8491: sub make_passwd_file {
8492: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
8493: my $result="ok";
8494: if ($umode eq 'krb4' or $umode eq 'krb5') {
8495: {
8496: my $pf = IO::File->new(">$passfilename");
8497: if ($pf) {
8498: print $pf "$umode:$npass\n";
8499: &update_passwd_history($uname,$udom,$umode,$action);
8500: } else {
8501: $result = "pass_file_failed_error";
8502: }
8503: }
8504: } elsif ($umode eq 'internal') {
8505: my $ncpass = &hash_passwd($udom,$npass);
8506: {
8507: &Debug("Creating internal auth");
8508: my $pf = IO::File->new(">$passfilename");
8509: if($pf) {
8510: print $pf "internal:$ncpass\n";
8511: &update_passwd_history($uname,$udom,$umode,$action);
8512: } else {
8513: $result = "pass_file_failed_error";
8514: }
8515: }
8516: } elsif ($umode eq 'localauth') {
8517: {
8518: my $pf = IO::File->new(">$passfilename");
8519: if($pf) {
8520: print $pf "localauth:$npass\n";
8521: &update_passwd_history($uname,$udom,$umode,$action);
8522: } else {
8523: $result = "pass_file_failed_error";
8524: }
8525: }
8526: } elsif ($umode eq 'unix') {
8527: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
8528: $result="no_new_unix_accounts";
8529: } elsif ($umode eq 'none') {
8530: {
8531: my $pf = IO::File->new("> $passfilename");
8532: if($pf) {
8533: print $pf "none:\n";
8534: } else {
8535: $result = "pass_file_failed_error";
8536: }
8537: }
8538: } elsif ($umode eq 'lti') {
8539: my $pf = IO::File->new(">$passfilename");
8540: if($pf) {
8541: print $pf "lti:\n";
8542: &update_passwd_history($uname,$udom,$umode,$action);
8543: } else {
8544: $result = "pass_file_failed_error";
8545: }
8546: } else {
8547: $result="auth_mode_error";
8548: }
8549: return $result;
8550: }
8551:
8552: sub convert_photo {
8553: my ($start,$dest)=@_;
8554: system("convert $start $dest");
8555: }
8556:
8557: sub sethost {
8558: my ($remotereq) = @_;
8559: my (undef,$hostid)=split(/:/,$remotereq);
8560: # ignore sethost if we are already correct
8561: if ($hostid eq $currenthostid) {
8562: return 'ok';
8563: }
8564:
8565: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
8566: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
8567: eq &Apache::lonnet::get_host_ip($hostid)) {
8568: $currenthostid =$hostid;
8569: $currentdomainid=&Apache::lonnet::host_domain($hostid);
8570: &set_client_info();
8571: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
8572: } else {
8573: &logthis("Requested host id $hostid not an alias of ".
8574: $perlvar{'lonHostID'}." refusing connection");
8575: return 'unable_to_set';
8576: }
8577: return 'ok';
8578: }
8579:
8580: sub version {
8581: my ($userinput)=@_;
8582: $remoteVERSION=(split(/:/,$userinput))[1];
8583: return "version:$VERSION";
8584: }
8585:
8586: sub get_usersession_config {
8587: my ($dom,$name) = @_;
8588: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8589: if (defined($cached)) {
8590: return $usersessionconf;
8591: } else {
8592: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
8593: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
8594: return $domconfig{'usersessions'};
8595: }
8596: return;
8597: }
8598:
8599: sub get_usersearch_config {
8600: my ($dom,$name) = @_;
8601: my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8602: if (defined($cached)) {
8603: return $usersearchconf;
8604: } else {
8605: my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
8606: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600);
8607: return $domconfig{'directorysrch'};
8608: }
8609: return;
8610: }
8611:
8612: sub get_prohibited {
8613: my ($dom) = @_;
8614: my $name = 'trust';
8615: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8616: unless (defined($cached)) {
8617: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
8618: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
8619: $trustconfig = $domconfig{'trust'};
8620: }
8621: my %prohibited;
8622: if (ref($trustconfig)) {
8623: foreach my $prefix (keys(%{$trustconfig})) {
8624: if (ref($trustconfig->{$prefix}) eq 'HASH') {
8625: my $reject;
8626: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
8627: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
8628: $reject = 1;
8629: }
8630: }
8631: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
8632: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
8633: $reject = 0;
8634: } else {
8635: $reject = 1;
8636: }
8637: }
8638: if ($reject) {
8639: $prohibited{$prefix} = 1;
8640: }
8641: }
8642: }
8643: }
8644: return %prohibited;
8645: }
8646:
8647: sub get_remote_hostable {
8648: my ($dom) = @_;
8649: my $result;
8650: if ($clientintdom) {
8651: $result = 1;
8652: my $remsessconf = &get_usersession_config($dom,'remotesession');
8653: if (ref($remsessconf) eq 'HASH') {
8654: if (ref($remsessconf->{'remote'}) eq 'HASH') {
8655: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
8656: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
8657: $result = 0;
8658: }
8659: }
8660: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
8661: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
8662: $result = 1;
8663: } else {
8664: $result = 0;
8665: }
8666: }
8667: }
8668: }
8669: }
8670: return $result;
8671: }
8672:
8673: sub distro_and_arch {
8674: return $dist.':'.$arch;
8675: }
8676:
8677: # ----------------------------------- POD (plain old documentation, CPAN style)
8678:
8679: =head1 NAME
8680:
8681: lond - "LON Daemon" Server (port "LOND" 5663)
8682:
8683: =head1 SYNOPSIS
8684:
8685: Usage: B<lond>
8686:
8687: Should only be run as user=www. This is a command-line script which
8688: is invoked by B<loncron>. There is no expectation that a typical user
8689: will manually start B<lond> from the command-line. (In other words,
8690: DO NOT START B<lond> YOURSELF.)
8691:
8692: =head1 DESCRIPTION
8693:
8694: There are two characteristics associated with the running of B<lond>,
8695: PROCESS MANAGEMENT (starting, stopping, handling child processes)
8696: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
8697: subscriptions, etc). These are described in two large
8698: sections below.
8699:
8700: B<PROCESS MANAGEMENT>
8701:
8702: Preforker - server who forks first. Runs as a daemon. HUPs.
8703: Uses IDEA encryption
8704:
8705: B<lond> forks off children processes that correspond to the other servers
8706: in the network. Management of these processes can be done at the
8707: parent process level or the child process level.
8708:
8709: B<logs/lond.log> is the location of log messages.
8710:
8711: The process management is now explained in terms of linux shell commands,
8712: subroutines internal to this code, and signal assignments:
8713:
8714: =over 4
8715:
8716: =item *
8717:
8718: PID is stored in B<logs/lond.pid>
8719:
8720: This is the process id number of the parent B<lond> process.
8721:
8722: =item *
8723:
8724: SIGTERM and SIGINT
8725:
8726: Parent signal assignment:
8727: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
8728:
8729: Child signal assignment:
8730: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
8731: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
8732: to restart a new child.)
8733:
8734: Command-line invocations:
8735: B<kill> B<-s> SIGTERM I<PID>
8736: B<kill> B<-s> SIGINT I<PID>
8737:
8738: Subroutine B<HUNTSMAN>:
8739: This is only invoked for the B<lond> parent I<PID>.
8740: This kills all the children, and then the parent.
8741: The B<lonc.pid> file is cleared.
8742:
8743: =item *
8744:
8745: SIGHUP
8746:
8747: Current bug:
8748: This signal can only be processed the first time
8749: on the parent process. Subsequent SIGHUP signals
8750: have no effect.
8751:
8752: Parent signal assignment:
8753: $SIG{HUP} = \&HUPSMAN;
8754:
8755: Child signal assignment:
8756: none (nothing happens)
8757:
8758: Command-line invocations:
8759: B<kill> B<-s> SIGHUP I<PID>
8760:
8761: Subroutine B<HUPSMAN>:
8762: This is only invoked for the B<lond> parent I<PID>,
8763: This kills all the children, and then the parent.
8764: The B<lond.pid> file is cleared.
8765:
8766: =item *
8767:
8768: SIGUSR1
8769:
8770: Parent signal assignment:
8771: $SIG{USR1} = \&USRMAN;
8772:
8773: Child signal assignment:
8774: $SIG{USR1}= \&logstatus;
8775:
8776: Command-line invocations:
8777: B<kill> B<-s> SIGUSR1 I<PID>
8778:
8779: Subroutine B<USRMAN>:
8780: When invoked for the B<lond> parent I<PID>,
8781: SIGUSR1 is sent to all the children, and the status of
8782: each connection is logged.
8783:
8784: =item *
8785:
8786: SIGUSR2
8787:
8788: Parent Signal assignment:
8789: $SIG{USR2} = \&UpdateHosts
8790:
8791: Child signal assignment:
8792: NONE
8793:
8794:
8795: =item *
8796:
8797: SIGCHLD
8798:
8799: Parent signal assignment:
8800: $SIG{CHLD} = \&REAPER;
8801:
8802: Child signal assignment:
8803: none
8804:
8805: Command-line invocations:
8806: B<kill> B<-s> SIGCHLD I<PID>
8807:
8808: Subroutine B<REAPER>:
8809: This is only invoked for the B<lond> parent I<PID>.
8810: Information pertaining to the child is removed.
8811: The socket port is cleaned up.
8812:
8813: =back
8814:
8815: B<SERVER-SIDE ACTIVITIES>
8816:
8817: Server-side information can be accepted in an encrypted or non-encrypted
8818: method.
8819:
8820: =over 4
8821:
8822: =item ping
8823:
8824: Query a client in the hosts.tab table; "Are you there?"
8825:
8826: =item pong
8827:
8828: Respond to a ping query.
8829:
8830: =item ekey
8831:
8832: Read in encrypted key, make cipher. Respond with a buildkey.
8833:
8834: =item load
8835:
8836: Respond with CPU load based on a computation upon /proc/loadavg.
8837:
8838: =item currentauth
8839:
8840: Reply with current authentication information (only over an
8841: encrypted channel).
8842:
8843: =item auth
8844:
8845: Only over an encrypted channel, reply as to whether a user's
8846: authentication information can be validated.
8847:
8848: =item passwd
8849:
8850: Allow for a password to be set.
8851:
8852: =item makeuser
8853:
8854: Make a user.
8855:
8856: =item changeuserauth
8857:
8858: Allow for authentication mechanism and password to be changed.
8859:
8860: =item home
8861:
8862: Respond to a question "are you the home for a given user?"
8863:
8864: =item update
8865:
8866: Update contents of a subscribed resource.
8867:
8868: =item unsubscribe
8869:
8870: The server is unsubscribing from a resource.
8871:
8872: =item subscribe
8873:
8874: The server is subscribing to a resource.
8875:
8876: =item log
8877:
8878: Place in B<logs/lond.log>
8879:
8880: =item put
8881:
8882: stores hash in namespace
8883:
8884: =item rolesput
8885:
8886: put a role into a user's environment
8887:
8888: =item get
8889:
8890: returns hash with keys from array
8891: reference filled in from namespace
8892:
8893: =item eget
8894:
8895: returns hash with keys from array
8896: reference filled in from namesp (encrypts the return communication)
8897:
8898: =item rolesget
8899:
8900: get a role from a user's environment
8901:
8902: =item del
8903:
8904: deletes keys out of array from namespace
8905:
8906: =item keys
8907:
8908: returns namespace keys
8909:
8910: =item dump
8911:
8912: dumps the complete (or key matching regexp) namespace into a hash
8913:
8914: =item store
8915:
8916: stores hash permanently
8917: for this url; hashref needs to be given and should be a \%hashname; the
8918: remaining args aren't required and if they aren't passed or are '' they will
8919: be derived from the ENV
8920:
8921: =item restore
8922:
8923: returns a hash for a given url
8924:
8925: =item querysend
8926:
8927: Tells client about the lonsql process that has been launched in response
8928: to a sent query.
8929:
8930: =item queryreply
8931:
8932: Accept information from lonsql and make appropriate storage in temporary
8933: file space.
8934:
8935: =item idput
8936:
8937: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
8938: for each student, defined perhaps by the institutional Registrar.)
8939:
8940: =item idget
8941:
8942: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
8943: for each student, defined perhaps by the institutional Registrar.)
8944:
8945: =item iddel
8946:
8947: Deletes one or more ids in a domain's id database.
8948:
8949: =item tmpput
8950:
8951: Accept and store information in temporary space.
8952:
8953: =item tmpget
8954:
8955: Send along temporarily stored information.
8956:
8957: =item ls
8958:
8959: List part of a user's directory.
8960:
8961: =item pushtable
8962:
8963: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
8964: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
8965: must be restored manually in case of a problem with the new table file.
8966: pushtable requires that the request be encrypted and validated via
8967: ValidateManager. The form of the command is:
8968: enc:pushtable tablename <tablecontents> \n
8969: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
8970: cleartext newline.
8971:
8972: =item Hanging up (exit or init)
8973:
8974: What to do when a client tells the server that they (the client)
8975: are leaving the network.
8976:
8977: =item unknown command
8978:
8979: If B<lond> is sent an unknown command (not in the list above),
8980: it replys to the client "unknown_cmd".
8981:
8982:
8983: =item UNKNOWN CLIENT
8984:
8985: If the anti-spoofing algorithm cannot verify the client,
8986: the client is rejected (with a "refused" message sent
8987: to the client, and the connection is closed.
8988:
8989: =back
8990:
8991: =head1 PREREQUISITES
8992:
8993: IO::Socket
8994: IO::File
8995: Apache::File
8996: POSIX
8997: Crypt::IDEA
8998: GDBM_File
8999: Authen::Krb4
9000: Authen::Krb5
9001:
9002: =head1 COREQUISITES
9003:
9004: none
9005:
9006: =head1 OSNAMES
9007:
9008: linux
9009:
9010: =head1 SCRIPT CATEGORIES
9011:
9012: Server/Process
9013:
9014: =cut
9015:
9016:
9017: =pod
9018:
9019: =head1 LOG MESSAGES
9020:
9021: The messages below can be emitted in the lond log. This log is located
9022: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
9023: to provide coloring if examined from inside a web page. Some do not.
9024: Where color is used, the colors are; Red for sometihhng to get excited
9025: about and to follow up on. Yellow for something to keep an eye on to
9026: be sure it does not get worse, Green,and Blue for informational items.
9027:
9028: In the discussions below, sometimes reference is made to ~httpd
9029: when describing file locations. There isn't really an httpd
9030: user, however there is an httpd directory that gets installed in the
9031: place that user home directories go. On linux, this is usually
9032: (always?) /home/httpd.
9033:
9034:
9035: Some messages are colorless. These are usually (not always)
9036: Green/Blue color level messages.
9037:
9038: =over 2
9039:
9040: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
9041:
9042: A local connection negotiation was attempted by
9043: a host whose IP address was not 127.0.0.1.
9044: The socket is closed and the child will exit.
9045: lond has three ways to establish an encyrption
9046: key with a client:
9047:
9048: =over 2
9049:
9050: =item local
9051:
9052: The key is written and read from a file.
9053: This is only valid for connections from localhost.
9054:
9055: =item insecure
9056:
9057: The key is generated by the server and
9058: transmitted to the client.
9059:
9060: =item ssl (secure)
9061:
9062: An ssl connection is negotiated with the client,
9063: the key is generated by the server and sent to the
9064: client across this ssl connection before the
9065: ssl connectionis terminated and clear text
9066: transmission resumes.
9067:
9068: =back
9069:
9070: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
9071:
9072: The client is local but has not sent an initialization
9073: string that is the literal "init:local" The connection
9074: is closed and the child exits.
9075:
9076: =item Red CRITICAL Can't get key file <error>
9077:
9078: SSL key negotiation is being attempted but the call to
9079: lonssl::KeyFile failed. This usually means that the
9080: configuration file is not correctly defining or protecting
9081: the directories/files lonCertificateDirectory or
9082: lonnetPrivateKey
9083: <error> is a string that describes the reason that
9084: the key file could not be located.
9085:
9086: =item (Red) CRITICAL Can't get certificates <error>
9087:
9088: SSL key negotiation failed because we were not able to retrives our certificate
9089: or the CA's certificate in the call to lonssl::CertificateFile
9090: <error> is the textual reason this failed. Usual reasons:
9091:
9092: =over 2
9093:
9094: =item Apache config file for loncapa incorrect:
9095:
9096: one of the variables
9097: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
9098: undefined or incorrect
9099:
9100: =item Permission error:
9101:
9102: The directory pointed to by lonCertificateDirectory is not readable by lond
9103:
9104: =item Permission error:
9105:
9106: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
9107:
9108: =item Installation error:
9109:
9110: Either the certificate authority file or the certificate have not
9111: been installed in lonCertificateDirectory.
9112:
9113: =item (Red) CRITICAL SSL Socket promotion failed: <err>
9114:
9115: The promotion of the connection from plaintext to SSL failed
9116: <err> is the reason for the failure. There are two
9117: system calls involved in the promotion (one of which failed),
9118: a dup to produce
9119: a second fd on the raw socket over which the encrypted data
9120: will flow and IO::SOcket::SSL->new_from_fd which creates
9121: the SSL connection on the duped fd.
9122:
9123: =item (Blue) WARNING client did not respond to challenge
9124:
9125: This occurs on an insecure (non SSL) connection negotiation request.
9126: lond generates some number from the time, the PID and sends it to
9127: the client. The client must respond by echoing this information back.
9128: If the client does not do so, that's a violation of the challenge
9129: protocols and the connection will be failed.
9130:
9131: =item (Red) No manager table. Nobody can manage!!
9132:
9133: lond has the concept of privileged hosts that
9134: can perform remote management function such
9135: as update the hosts.tab. The manager hosts
9136: are described in the
9137: ~httpd/lonTabs/managers.tab file.
9138: this message is logged if this file is missing.
9139:
9140:
9141: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
9142:
9143: Reports the successful parse and registration
9144: of a specific manager.
9145:
9146: =item Green existing host <clustername:dnsname>
9147:
9148: The manager host is already defined in the hosts.tab
9149: the information in that table, rather than the info in the
9150: manager table will be used to determine the manager's ip.
9151:
9152: =item (Red) Unable to craete <filename>
9153:
9154: lond has been asked to create new versions of an administrative
9155: file (by a manager). When this is done, the new file is created
9156: in a temp file and then renamed into place so that there are always
9157: usable administrative files, even if the update fails. This failure
9158: message means that the temp file could not be created.
9159: The update is abandoned, and the old file is available for use.
9160:
9161: =item (Green) CopyFile from <oldname> to <newname> failed
9162:
9163: In an update of administrative files, the copy of the existing file to a
9164: backup file failed. The installation of the new file may still succeed,
9165: but there will not be a back up file to rever to (this should probably
9166: be yellow).
9167:
9168: =item (Green) Pushfile: backed up <oldname> to <newname>
9169:
9170: See above, the backup of the old administrative file succeeded.
9171:
9172: =item (Red) Pushfile: Unable to install <filename> <reason>
9173:
9174: The new administrative file could not be installed. In this case,
9175: the old administrative file is still in use.
9176:
9177: =item (Green) Installed new < filename>.
9178:
9179: The new administrative file was successfullly installed.
9180:
9181: =item (Red) Reinitializing lond pid=<pid>
9182:
9183: The lonc child process <pid> will be sent a USR2
9184: signal.
9185:
9186: =item (Red) Reinitializing self
9187:
9188: We've been asked to re-read our administrative files,and
9189: are doing so.
9190:
9191: =item (Yellow) error:Invalid process identifier <ident>
9192:
9193: A reinit command was received, but the target part of the
9194: command was not valid. It must be either
9195: 'lond' or 'lonc' but was <ident>
9196:
9197: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
9198:
9199: Checking to see if lond has been handed a valid edit
9200: command. It is possible the edit command is not valid
9201: in that case there are no log messages to indicate that.
9202:
9203: =item Result of password change for <username> pwchange_success
9204:
9205: The password for <username> was
9206: successfully changed.
9207:
9208: =item Unable to open <user> passwd to change password
9209:
9210: Could not rewrite the
9211: internal password file for a user
9212:
9213: =item Result of password change for <user> : <result>
9214:
9215: A unix password change for <user> was attempted
9216: and the pipe returned <result>
9217:
9218: =item LWP GET: <message> for <fname> (<remoteurl>)
9219:
9220: The lightweight process fetch for a resource failed
9221: with <message> the local filename that should
9222: have existed/been created was <fname> the
9223: corresponding URI: <remoteurl> This is emitted in several
9224: places.
9225:
9226: =item Unable to move <transname> to <destname>
9227:
9228: From fetch_user_file_handler - the user file was replicated but could not
9229: be mv'd to its final location.
9230:
9231: =item Looking for <domain> <username>
9232:
9233: From user_has_session_handler - This should be a Debug call instead
9234: it indicates lond is about to check whether the specified user has a
9235: session active on the specified domain on the local host.
9236:
9237: =item Client <ip> (<name>) hanging up: <input>
9238:
9239: lond has been asked to exit by its client. The <ip> and <name> identify the
9240: client systemand <input> is the full exit command sent to the server.
9241:
9242: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
9243:
9244: A lond child terminated. NOte that this termination can also occur when the
9245: child receives the QUIT or DIE signals. <pid> is the process id of the child,
9246: <hostname> the host lond is working for, and <message> the reason the child died
9247: to the best of our ability to get it (I would guess that any numeric value
9248: represents and errno value). This is immediately followed by
9249:
9250: =item Famous last words: Catching exception - <log>
9251:
9252: Where log is some recent information about the state of the child.
9253:
9254: =item Red CRITICAL: TIME OUT <pid>
9255:
9256: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
9257: doing an HTTP::GET.
9258:
9259: =item child <pid> died
9260:
9261: The reaper caught a SIGCHILD for the lond child process <pid>
9262: This should be modified to also display the IP of the dying child
9263: $children{$pid}
9264:
9265: =item Unknown child 0 died
9266: A child died but the wait for it returned a pid of zero which really should not
9267: ever happen.
9268:
9269: =item Child <which> - <pid> looks like we missed it's death
9270:
9271: When a sigchild is received, the reaper process checks all children to see if they are
9272: alive. If children are dying quite quickly, the lack of signal queuing can mean
9273: that a signal hearalds the death of more than one child. If so this message indicates
9274: which other one died. <which> is the ip of a dead child
9275:
9276: =item Free socket: <shutdownretval>
9277:
9278: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
9279: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
9280: to return anything. This is followed by:
9281:
9282: =item Red CRITICAL: Shutting down
9283:
9284: Just prior to exit.
9285:
9286: =item Free socket: <shutdownretval>
9287:
9288: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
9289: This is followed by:
9290:
9291: =item (Red) CRITICAL: Restarting
9292:
9293: lond is about to exec itself to restart.
9294:
9295: =item (Blue) Updating connections
9296:
9297: (In response to a USR2). All the children (except the one for localhost)
9298: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
9299:
9300: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
9301:
9302: Due to USR2 as above.
9303:
9304: =item (Green) keeping child for ip <ip> (pid = <pid>)
9305:
9306: In response to USR2 as above, the child indicated is not being restarted because
9307: it's assumed that we'll always need a child for the localhost.
9308:
9309:
9310: =item Going to check on the children
9311:
9312: Parent is about to check on the health of the child processes.
9313: Note that this is in response to a USR1 sent to the parent lond.
9314: there may be one or more of the next two messages:
9315:
9316: =item <pid> is dead
9317:
9318: A child that we have in our child hash as alive has evidently died.
9319:
9320: =item Child <pid> did not respond
9321:
9322: In the health check the child <pid> did not update/produce a pid_.txt
9323: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
9324: assumed to be hung in some un-fixable way.
9325:
9326: =item Finished checking children
9327:
9328: Master processs's USR1 processing is cojmplete.
9329:
9330: =item (Red) CRITICAL: ------- Starting ------
9331:
9332: (There are more '-'s on either side). Lond has forked itself off to
9333: form a new session and is about to start actual initialization.
9334:
9335: =item (Green) Attempting to start child (<client>)
9336:
9337: Started a new child process for <client>. Client is IO::Socket object
9338: connected to the child. This was as a result of a TCP/IP connection from a client.
9339:
9340: =item Unable to determine who caller was, getpeername returned nothing
9341:
9342: In child process initialization. either getpeername returned undef or
9343: a zero sized object was returned. Processing continues, but in my opinion,
9344: this should be cause for the child to exit.
9345:
9346: =item Unable to determine clientip
9347:
9348: In child process initialization. The peer address from getpeername was not defined.
9349: The client address is stored as "Unavailable" and processing continues.
9350:
9351: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
9352:
9353: In child initialization. A good connectionw as received from <ip>.
9354:
9355: =over 2
9356:
9357: =item <name>
9358:
9359: is the name of the client from hosts.tab.
9360:
9361: =item <type>
9362:
9363: Is the connection type which is either
9364:
9365: =over 2
9366:
9367: =item manager
9368:
9369: The connection is from a manager node, not in hosts.tab
9370:
9371: =item client
9372:
9373: the connection is from a non-manager in the hosts.tab
9374:
9375: =item both
9376:
9377: The connection is from a manager in the hosts.tab.
9378:
9379: =back
9380:
9381: =back
9382:
9383: =item (Blue) Certificates not installed -- trying insecure auth
9384:
9385: One of the certificate file, key file or
9386: certificate authority file could not be found for a client attempting
9387: SSL connection intiation. COnnection will be attemptied in in-secure mode.
9388: (this would be a system with an up to date lond that has not gotten a
9389: certificate from us).
9390:
9391: =item (Green) Successful local authentication
9392:
9393: A local connection successfully negotiated the encryption key.
9394: In this case the IDEA key is in a file (that is hopefully well protected).
9395:
9396: =item (Green) Successful ssl authentication with <client>
9397:
9398: The client (<client> is the peer's name in hosts.tab), has successfully
9399: negotiated an SSL connection with this child process.
9400:
9401: =item (Green) Successful insecure authentication with <client>
9402:
9403:
9404: The client has successfully negotiated an insecure connection withthe child process.
9405:
9406: =item (Yellow) Attempted insecure connection disallowed
9407:
9408: The client attempted and failed to successfully negotiate a successful insecure
9409: connection. This can happen either because the variable londAllowInsecure is false
9410: or undefined, or becuse the child did not successfully echo back the challenge
9411: string.
9412:
9413:
9414: =back
9415:
9416: =back
9417:
9418:
9419: =cut
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