1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.562 2020/05/04 17:05:10 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: 1.562 $'; #' 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: coursesessions => {institutiononly => 1},
224: currentauth => {remote => 1, domroles => 1, enroll => 1},
225: currentdump => {remote => 1, enroll => 1},
226: currentversion => {remote=> 1, content => 1},
227: dcmaildump => {remote => 1, domroles => 1},
228: dcmailput => {remote => 1, domroles => 1},
229: del => {remote => 1, domroles => 1, enroll => 1, content => 1},
230: delbalcookie => {institutiononly => 1},
231: delusersession => {institutiononly => 1},
232: deldom => {remote => 1, domroles => 1}, # not currently used
233: devalidatecache => {institutiononly => 1},
234: domroleput => {remote => 1, enroll => 1},
235: domrolesdump => {remote => 1, catalog => 1},
236: du => {remote => 1, enroll => 1},
237: du2 => {remote => 1, enroll => 1},
238: dump => {remote => 1, enroll => 1, domroles => 1},
239: edit => {institutiononly => 1}, #not used currently
240: eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
241: egetdom => {remote => 1, domroles => 1, enroll => 1, },
242: ekey => {anywhere => 1},
243: exit => {anywhere => 1},
244: fetchuserfile => {remote => 1, enroll => 1},
245: get => {remote => 1, domroles => 1, enroll => 1},
246: getdom => {anywhere => 1},
247: home => {anywhere => 1},
248: iddel => {remote => 1, enroll => 1},
249: idget => {remote => 1, enroll => 1},
250: idput => {remote => 1, domroles => 1, enroll => 1},
251: inc => {remote => 1, enroll => 1},
252: init => {anywhere => 1},
253: inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
254: instemailrules => {remote => 1, domroles => 1},
255: instidrulecheck => {remote => 1, domroles => 1,},
256: instidrules => {remote => 1, domroles => 1,},
257: instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
258: instselfcreatecheck => {institutiononly => 1},
259: instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
260: keys => {remote => 1,},
261: load => {anywhere => 1},
262: log => {anywhere => 1},
263: ls => {remote => 1, enroll => 1, content => 1,},
264: ls2 => {remote => 1, enroll => 1, content => 1,},
265: ls3 => {remote => 1, enroll => 1, content => 1,},
266: makeuser => {remote => 1, enroll => 1, domroles => 1,},
267: mkdiruserfile => {remote => 1, enroll => 1,},
268: newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
269: passwd => {remote => 1},
270: ping => {anywhere => 1},
271: pong => {anywhere => 1},
272: pushfile => {manageronly => 1},
273: put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
274: putdom => {remote => 1, domroles => 1,},
275: putstore => {remote => 1, enroll => 1},
276: queryreply => {anywhere => 1},
277: querysend => {anywhere => 1},
278: querysend_activitylog => {remote => 1},
279: querysend_allusers => {remote => 1, domroles => 1},
280: querysend_courselog => {remote => 1},
281: querysend_fetchenrollment => {remote => 1},
282: querysend_getinstuser => {remote => 1},
283: querysend_getmultinstusers => {remote => 1},
284: querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1},
285: querysend_institutionalphotos => {remote => 1},
286: querysend_portfolio_metadata => {remote => 1, content => 1},
287: querysend_userlog => {remote => 1, domroles => 1},
288: querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1},
289: quit => {anywhere => 1},
290: readlonnetglobal => {institutiononly => 1},
291: reinit => {manageronly => 1}, #not used currently
292: removeuserfile => {remote => 1, enroll => 1},
293: renameuserfile => {remote => 1,},
294: restore => {remote => 1, enroll => 1, reqcrs => 1,},
295: rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
296: rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
297: servercerts => {institutiononly => 1},
298: serverdistarch => {anywhere => 1},
299: serverhomeID => {anywhere => 1},
300: serverloncaparev => {anywhere => 1},
301: servertimezone => {remote => 1, enroll => 1},
302: setannounce => {remote => 1, domroles => 1},
303: sethost => {anywhere => 1},
304: store => {remote => 1, enroll => 1, reqcrs => 1,},
305: studentphoto => {remote => 1, enroll => 1},
306: sub => {content => 1,},
307: tmpdel => {institutiononly => 1},
308: tmpget => {institutiononly => 1},
309: tmpput => {remote => 1, othcoau => 1},
310: tokenauthuserfile => {anywhere => 1},
311: unsub => {content => 1,},
312: update => {shared => 1},
313: updateclickers => {remote => 1},
314: userhassession => {anywhere => 1},
315: userload => {anywhere => 1},
316: version => {anywhere => 1}, #not used
317: );
318:
319: #
320: # Statistics that are maintained and dislayed in the status line.
321: #
322: my $Transactions = 0; # Number of attempted transactions.
323: my $Failures = 0; # Number of transcations failed.
324:
325: # ResetStatistics:
326: # Resets the statistics counters:
327: #
328: sub ResetStatistics {
329: $Transactions = 0;
330: $Failures = 0;
331: }
332:
333: #------------------------------------------------------------------------
334: #
335: # LocalConnection
336: # Completes the formation of a locally authenticated connection.
337: # This function will ensure that the 'remote' client is really the
338: # local host. If not, the connection is closed, and the function fails.
339: # If so, initcmd is parsed for the name of a file containing the
340: # IDEA session key. The fie is opened, read, deleted and the session
341: # key returned to the caller.
342: #
343: # Parameters:
344: # $Socket - Socket open on client.
345: # $initcmd - The full text of the init command.
346: #
347: # Returns:
348: # IDEA session key on success.
349: # undef on failure.
350: #
351: sub LocalConnection {
352: my ($Socket, $initcmd) = @_;
353: Debug("Attempting local connection: $initcmd client: $clientip");
354: if($clientip ne "127.0.0.1") {
355: &logthis('<font color="red"> LocalConnection rejecting non local: '
356: ."$clientip ne 127.0.0.1 </font>");
357: close $Socket;
358: return undef;
359: } else {
360: chomp($initcmd); # Get rid of \n in filename.
361: my ($init, $type, $name) = split(/:/, $initcmd);
362: Debug(" Init command: $init $type $name ");
363:
364: # Require that $init = init, and $type = local: Otherwise
365: # the caller is insane:
366:
367: if(($init ne "init") && ($type ne "local")) {
368: &logthis('<font color = "red"> LocalConnection: caller is insane! '
369: ."init = $init, and type = $type </font>");
370: close($Socket);;
371: return undef;
372:
373: }
374: # Now get the key filename:
375:
376: my $IDEAKey = lonlocal::ReadKeyFile($name);
377: return $IDEAKey;
378: }
379: }
380: #------------------------------------------------------------------------------
381: #
382: # SSLConnection
383: # Completes the formation of an ssh authenticated connection. The
384: # socket is promoted to an ssl socket. If this promotion and the associated
385: # certificate exchange are successful, the IDEA key is generated and sent
386: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
387: # the caller after the SSL tunnel is torn down.
388: #
389: # Parameters:
390: # Name Type Purpose
391: # $Socket IO::Socket::INET Plaintext socket.
392: #
393: # Returns:
394: # IDEA key on success.
395: # undef on failure.
396: #
397: sub SSLConnection {
398: my $Socket = shift;
399:
400: Debug("SSLConnection: ");
401: my $KeyFile = lonssl::KeyFile();
402: if(!$KeyFile) {
403: my $err = lonssl::LastError();
404: &logthis("<font color=\"red\"> CRITICAL"
405: ."Can't get key file $err </font>");
406: return undef;
407: }
408: my ($CACertificate,
409: $Certificate) = lonssl::CertificateFile();
410:
411:
412: # If any of the key, certificate or certificate authority
413: # certificate filenames are not defined, this can't work.
414:
415: if((!$Certificate) || (!$CACertificate)) {
416: my $err = lonssl::LastError();
417: &logthis("<font color=\"red\"> CRITICAL"
418: ."Can't get certificates: $err </font>");
419:
420: return undef;
421: }
422: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
423:
424: # Indicate to our peer that we can procede with
425: # a transition to ssl authentication:
426:
427: print $Socket "ok:ssl\n";
428:
429: Debug("Approving promotion -> ssl");
430: # And do so:
431:
432: my $CRLFile;
433: unless ($crlchecked{$clientname}) {
434: $CRLFile = lonssl::CRLFile();
435: $crlchecked{$clientname} = 1;
436: }
437:
438: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
439: $CACertificate,
440: $Certificate,
441: $KeyFile,
442: $clientname,
443: $CRLFile,
444: $clientversion);
445: if(! ($SSLSocket) ) { # SSL socket promotion failed.
446: my $err = lonssl::LastError();
447: &logthis("<font color=\"red\"> CRITICAL "
448: ."SSL Socket promotion failed: $err </font>");
449: return undef;
450: }
451: Debug("SSL Promotion successful");
452:
453: #
454: # The only thing we'll use the socket for is to send the IDEA key
455: # to the peer:
456:
457: my $Key = lonlocal::CreateCipherKey();
458: print $SSLSocket "$Key\n";
459:
460: lonssl::Close($SSLSocket);
461:
462: Debug("Key exchange complete: $Key");
463:
464: return $Key;
465: }
466: #
467: # InsecureConnection:
468: # If insecure connections are allowd,
469: # exchange a challenge with the client to 'validate' the
470: # client (not really, but that's the protocol):
471: # We produce a challenge string that's sent to the client.
472: # The client must then echo the challenge verbatim to us.
473: #
474: # Parameter:
475: # Socket - Socket open on the client.
476: # Returns:
477: # 1 - success.
478: # 0 - failure (e.g.mismatch or insecure not allowed).
479: #
480: sub InsecureConnection {
481: my $Socket = shift;
482:
483: # Don't even start if insecure connections are not allowed.
484: # return 0 if Insecure connections not allowed.
485: #
486: if (ref($secureconf{'connfrom'}) eq 'HASH') {
487: if ($clientsamedom) {
488: if ($secureconf{'connfrom'}{'dom'} eq 'req') {
489: return 0;
490: }
491: } elsif ($clientsameinst) {
492: if ($secureconf{'connfrom'}{'intdom'} eq 'req') {
493: return 0;
494: }
495: } else {
496: if ($secureconf{'connfrom'}{'other'} eq 'req') {
497: return 0;
498: }
499: }
500: } elsif (!$perlvar{londAllowInsecure}) {
501: return 0;
502: }
503:
504: # Fabricate a challenge string and send it..
505:
506: my $challenge = "$$".time; # pid + time.
507: print $Socket "$challenge\n";
508: &status("Waiting for challenge reply");
509:
510: my $answer = <$Socket>;
511: $answer =~s/\W//g;
512: if($challenge eq $answer) {
513: return 1;
514: } else {
515: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
516: &status("No challenge reqply");
517: return 0;
518: }
519:
520:
521: }
522: #
523: # Safely execute a command (as long as it's not a shel command and doesn
524: # not require/rely on shell escapes. The function operates by doing a
525: # a pipe based fork and capturing stdout and stderr from the pipe.
526: #
527: # Formal Parameters:
528: # $line - A line of text to be executed as a command.
529: # Returns:
530: # The output from that command. If the output is multiline the caller
531: # must know how to split up the output.
532: #
533: #
534: sub execute_command {
535: my ($line) = @_;
536: my @words = split(/\s/, $line); # Bust the command up into words.
537: my $output = "";
538:
539: my $pid = open(CHILD, "-|");
540:
541: if($pid) { # Parent process
542: Debug("In parent process for execute_command");
543: my @data = <CHILD>; # Read the child's outupt...
544: close CHILD;
545: foreach my $output_line (@data) {
546: Debug("Adding $output_line");
547: $output .= $output_line; # Presumably has a \n on it.
548: }
549:
550: } else { # Child process
551: close (STDERR);
552: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
553: exec(@words); # won't return.
554: }
555: return $output;
556: }
557:
558:
559: # GetCertificate: Given a transaction that requires a certificate,
560: # this function will extract the certificate from the transaction
561: # request. Note that at this point, the only concept of a certificate
562: # is the hostname to which we are connected.
563: #
564: # Parameter:
565: # request - The request sent by our client (this parameterization may
566: # need to change when we really use a certificate granting
567: # authority.
568: #
569: sub GetCertificate {
570: my $request = shift;
571:
572: return $clientip;
573: }
574:
575: #
576: # Return true if client is a manager.
577: #
578: sub isManager {
579: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
580: }
581: #
582: # Return tru if client can do client functions
583: #
584: sub isClient {
585: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
586: }
587:
588:
589: #
590: # ReadManagerTable: Reads in the current manager table. For now this is
591: # done on each manager authentication because:
592: # - These authentications are not frequent
593: # - This allows dynamic changes to the manager table
594: # without the need to signal to the lond.
595: #
596: sub ReadManagerTable {
597:
598: &Debug("Reading manager table");
599: # Clean out the old table first..
600:
601: foreach my $key (keys %managers) {
602: delete $managers{$key};
603: }
604:
605: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
606: if (!open (MANAGERS, $tablename)) {
607: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
608: if (&Apache::lonnet::is_LC_dns($hostname)) {
609: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
610: }
611: return;
612: }
613: while(my $host = <MANAGERS>) {
614: chomp($host);
615: if ($host =~ "^#") { # Comment line.
616: next;
617: }
618: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
619: # The entry is of the form:
620: # cluname:hostname
621: # cluname - A 'cluster hostname' is needed in order to negotiate
622: # the host key.
623: # hostname- The dns name of the host.
624: #
625: my($cluname, $dnsname) = split(/:/, $host);
626:
627: my $ip = gethostbyname($dnsname);
628: if(defined($ip)) { # bad names don't deserve entry.
629: my $hostip = inet_ntoa($ip);
630: $managers{$hostip} = $cluname;
631: logthis('<font color="green"> registering manager '.
632: "$dnsname as $cluname with $hostip </font>\n");
633: }
634: } else {
635: logthis('<font color="green"> existing host'." $host</font>\n");
636: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
637: }
638: }
639: }
640:
641: #
642: # ValidManager: Determines if a given certificate represents a valid manager.
643: # in this primitive implementation, the 'certificate' is
644: # just the connecting loncapa client name. This is checked
645: # against a valid client list in the configuration.
646: #
647: #
648: sub ValidManager {
649: my $certificate = shift;
650:
651: return isManager;
652: }
653: #
654: # CopyFile: Called as part of the process of installing a
655: # new configuration file. This function copies an existing
656: # file to a backup file.
657: # Parameters:
658: # oldfile - Name of the file to backup.
659: # newfile - Name of the backup file.
660: # Return:
661: # 0 - Failure (errno has failure reason).
662: # 1 - Success.
663: #
664: sub CopyFile {
665:
666: my ($oldfile, $newfile) = @_;
667:
668: if (! copy($oldfile,$newfile)) {
669: return 0;
670: }
671: chmod(0660, $newfile);
672: return 1;
673: }
674: #
675: # Host files are passed out with externally visible host IPs.
676: # If, for example, we are behind a fire-wall or NAT host, our
677: # internally visible IP may be different than the externally
678: # visible IP. Therefore, we always adjust the contents of the
679: # host file so that the entry for ME is the IP that we believe
680: # we have. At present, this is defined as the entry that
681: # DNS has for us. If by some chance we are not able to get a
682: # DNS translation for us, then we assume that the host.tab file
683: # is correct.
684: # BUGBUGBUG - in the future, we really should see if we can
685: # easily query the interface(s) instead.
686: # Parameter(s):
687: # contents - The contents of the host.tab to check.
688: # Returns:
689: # newcontents - The adjusted contents.
690: #
691: #
692: sub AdjustHostContents {
693: my $contents = shift;
694: my $adjusted;
695: my $me = $perlvar{'lonHostID'};
696:
697: foreach my $line (split(/\n/,$contents)) {
698: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
699: ($line =~ /^\s*\^/))) {
700: chomp($line);
701: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
702: if ($id eq $me) {
703: my $ip = gethostbyname($name);
704: my $ipnew = inet_ntoa($ip);
705: $ip = $ipnew;
706: # Reconstruct the host line and append to adjusted:
707:
708: my $newline = "$id:$domain:$role:$name:$ip";
709: if($maxcon ne "") { # Not all hosts have loncnew tuning params
710: $newline .= ":$maxcon:$idleto:$mincon";
711: }
712: $adjusted .= $newline."\n";
713:
714: } else { # Not me, pass unmodified.
715: $adjusted .= $line."\n";
716: }
717: } else { # Blank or comment never re-written.
718: $adjusted .= $line."\n"; # Pass blanks and comments as is.
719: }
720: }
721: return $adjusted;
722: }
723: #
724: # InstallFile: Called to install an administrative file:
725: # - The file is created int a temp directory called <name>.tmp
726: # - lcinstall file is called to install the file.
727: # since the web app has no direct write access to the table directory
728: #
729: # Parameters:
730: # Name of the file
731: # File Contents.
732: # Return:
733: # nonzero - success.
734: # 0 - failure and $! has an errno.
735: # Assumptions:
736: # File installtion is a relatively infrequent
737: #
738: sub InstallFile {
739:
740: my ($Filename, $Contents) = @_;
741: # my $TempFile = $Filename.".tmp";
742: my $exedir = $perlvar{'lonDaemons'};
743: my $tmpdir = $exedir.'/tmp/';
744: my $TempFile = $tmpdir."TempTableFile.tmp";
745:
746: # Open the file for write:
747:
748: my $fh = IO::File->new("> $TempFile"); # Write to temp.
749: if(!(defined $fh)) {
750: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
751: return 0;
752: }
753: # write the contents of the file:
754:
755: print $fh ($Contents);
756: $fh->close; # In case we ever have a filesystem w. locking
757:
758: chmod(0664, $TempFile); # Everyone can write it.
759:
760: # Use lcinstall file to put the file in the table directory...
761:
762: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
763: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
764: close $pf;
765: my $err = $?;
766: &Debug("Status is $err");
767: if ($err != 0) {
768: my $msg = $err;
769: if ($err < @installerrors) {
770: $msg = $installerrors[$err];
771: }
772: &logthis("Install failed for table file $Filename : $msg");
773: return 0;
774: }
775:
776: # Remove the temp file:
777:
778: unlink($TempFile);
779:
780: return 1;
781: }
782:
783:
784: #
785: # ConfigFileFromSelector: converts a configuration file selector
786: # into a configuration file pathname.
787: # Supports the following file selectors:
788: # hosts, domain, dns_hosts, dns_domain
789: #
790: #
791: # Parameters:
792: # selector - Configuration file selector.
793: # Returns:
794: # Full path to the file or undef if the selector is invalid.
795: #
796: sub ConfigFileFromSelector {
797: my $selector = shift;
798: my $tablefile;
799:
800: if ($selector eq 'loncapaCAcrl') {
801: my $tabledir = $perlvar{'lonCertificateDirectory'};
802: if (-d $tabledir) {
803: $tablefile = $tabledir.'/'.$selector.'.pem';
804: }
805: } else {
806: my $tabledir = $perlvar{'lonTabDir'}.'/';
807: if (($selector eq "hosts") || ($selector eq "domain") ||
808: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
809: $tablefile = $tabledir.$selector.'.tab';
810: }
811: }
812: return $tablefile;
813: }
814: #
815: # PushFile: Called to do an administrative push of a file.
816: # - Ensure the file being pushed is one we support.
817: # - Backup the old file to <filename.saved>
818: # - Separate the contents of the new file out from the
819: # rest of the request.
820: # - Write the new file.
821: # Parameter:
822: # Request - The entire user request. This consists of a : separated
823: # string pushfile:tablename:contents.
824: # NOTE: The contents may have :'s in it as well making things a bit
825: # more interesting... but not much.
826: # Returns:
827: # String to send to client ("ok" or "refused" if bad file).
828: #
829: sub PushFile {
830: my $request = shift;
831: my ($command, $filename, $contents) = split(":", $request, 3);
832: &Debug("PushFile");
833:
834: # At this point in time, pushes for only the following tables and
835: # CRL file are supported:
836: # hosts.tab ($filename eq host).
837: # domain.tab ($filename eq domain).
838: # dns_hosts.tab ($filename eq dns_host).
839: # dns_domain.tab ($filename eq dns_domain).
840: # loncapaCAcrl.pem ($filename eq loncapaCAcrl).
841: # Construct the destination filename or reject the request.
842: #
843: # lonManage is supposed to ensure this, however this session could be
844: # part of some elaborate spoof that managed somehow to authenticate.
845: #
846:
847:
848: my $tablefile = ConfigFileFromSelector($filename);
849: if(! (defined $tablefile)) {
850: return "refused";
851: }
852:
853: # If the file being pushed is the host file, we adjust the entry for ourself so that the
854: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
855: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
856: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
857: # that possibilty.
858:
859: if($filename eq "host") {
860: $contents = AdjustHostContents($contents);
861: } elsif (($filename eq 'dns_host') || ($filename eq 'dns_domain') ||
862: ($filename eq 'loncapaCAcrl')) {
863: if ($contents eq '') {
864: &logthis('<font color="red"> Pushfile: unable to install '
865: .$tablefile." - no data received from push. </font>");
866: return 'error: push had no data';
867: }
868: if (&Apache::lonnet::get_host_ip($clientname)) {
869: my $clienthost = &Apache::lonnet::hostname($clientname);
870: if ($managers{$clientip} eq $clientname) {
871: my $clientprotocol = $Apache::lonnet::protocol{$clientname};
872: $clientprotocol = 'http' if ($clientprotocol ne 'https');
873: my $url;
874: if ($filename eq 'loncapaCAcrl') {
875: $url = '/adm/dns/loncapaCRL';
876: } else {
877: $url = '/adm/'.$filename;
878: $url =~ s{_}{/};
879: }
880: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
881: my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
882: if ($response->is_error()) {
883: &logthis('<font color="red"> Pushfile: unable to install '
884: .$tablefile." - error attempting to pull data. </font>");
885: return 'error: pull failed';
886: } else {
887: my $result = $response->content;
888: chomp($result);
889: unless ($result eq $contents) {
890: &logthis('<font color="red"> Pushfile: unable to install '
891: .$tablefile." - pushed data and pulled data differ. </font>");
892: my $pushleng = length($contents);
893: my $pullleng = length($result);
894: if ($pushleng != $pullleng) {
895: return "error: $pushleng vs $pullleng bytes";
896: } else {
897: return "error: mismatch push and pull";
898: }
899: }
900: }
901: }
902: }
903: }
904:
905: # Install the new file:
906:
907: &logthis("Installing new $tablefile contents:\n$contents");
908: if(!InstallFile($tablefile, $contents)) {
909: &logthis('<font color="red"> Pushfile: unable to install '
910: .$tablefile." $! </font>");
911: return "error:$!";
912: } else {
913: &logthis('<font color="green"> Installed new '.$tablefile
914: ." - transaction by: $clientname ($clientip)</font>");
915: my $adminmail = $perlvar{'lonAdmEMail'};
916: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
917: if ($admindom ne '') {
918: my %domconfig =
919: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
920: if (ref($domconfig{'contacts'}) eq 'HASH') {
921: if ($domconfig{'contacts'}{'adminemail'} ne '') {
922: $adminmail = $domconfig{'contacts'}{'adminemail'};
923: }
924: }
925: }
926: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
927: my $msg = new Mail::Send;
928: $msg->to($adminmail);
929: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
930: $msg->add('Content-type','text/plain; charset=UTF-8');
931: if (my $fh = $msg->open()) {
932: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
933: "$clientname ($clientip)\n";
934: $fh->close;
935: }
936: }
937: }
938:
939: # Indicate success:
940:
941: return "ok";
942:
943: }
944:
945: #
946: # Called to re-init either lonc or lond.
947: #
948: # Parameters:
949: # request - The full request by the client. This is of the form
950: # reinit:<process>
951: # where <process> is allowed to be either of
952: # lonc or lond
953: #
954: # Returns:
955: # The string to be sent back to the client either:
956: # ok - Everything worked just fine.
957: # error:why - There was a failure and why describes the reason.
958: #
959: #
960: sub ReinitProcess {
961: my $request = shift;
962:
963:
964: # separate the request (reinit) from the process identifier and
965: # validate it producing the name of the .pid file for the process.
966: #
967: #
968: my ($junk, $process) = split(":", $request);
969: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
970: if($process eq 'lonc') {
971: $processpidfile = $processpidfile."lonc.pid";
972: if (!open(PIDFILE, "< $processpidfile")) {
973: return "error:Open failed for $processpidfile";
974: }
975: my $loncpid = <PIDFILE>;
976: close(PIDFILE);
977: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
978: ."</font>");
979: kill("USR2", $loncpid);
980: } elsif ($process eq 'lond') {
981: logthis('<font color="red"> Reinitializing self (lond) </font>');
982: &UpdateHosts; # Lond is us!!
983: } else {
984: &logthis('<font color="yellow" Invalid reinit request for '.$process
985: ."</font>");
986: return "error:Invalid process identifier $process";
987: }
988: return 'ok';
989: }
990: # Validate a line in a configuration file edit script:
991: # Validation includes:
992: # - Ensuring the command is valid.
993: # - Ensuring the command has sufficient parameters
994: # Parameters:
995: # scriptline - A line to validate (\n has been stripped for what it's worth).
996: #
997: # Return:
998: # 0 - Invalid scriptline.
999: # 1 - Valid scriptline
1000: # NOTE:
1001: # Only the command syntax is checked, not the executability of the
1002: # command.
1003: #
1004: sub isValidEditCommand {
1005: my $scriptline = shift;
1006:
1007: # Line elements are pipe separated:
1008:
1009: my ($command, $key, $newline) = split(/\|/, $scriptline);
1010: &logthis('<font color="green"> isValideditCommand checking: '.
1011: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
1012:
1013: if ($command eq "delete") {
1014: #
1015: # key with no newline.
1016: #
1017: if( ($key eq "") || ($newline ne "")) {
1018: return 0; # Must have key but no newline.
1019: } else {
1020: return 1; # Valid syntax.
1021: }
1022: } elsif ($command eq "replace") {
1023: #
1024: # key and newline:
1025: #
1026: if (($key eq "") || ($newline eq "")) {
1027: return 0;
1028: } else {
1029: return 1;
1030: }
1031: } elsif ($command eq "append") {
1032: if (($key ne "") && ($newline eq "")) {
1033: return 1;
1034: } else {
1035: return 0;
1036: }
1037: } else {
1038: return 0; # Invalid command.
1039: }
1040: return 0; # Should not get here!!!
1041: }
1042: #
1043: # ApplyEdit - Applies an edit command to a line in a configuration
1044: # file. It is the caller's responsiblity to validate the
1045: # edit line.
1046: # Parameters:
1047: # $directive - A single edit directive to apply.
1048: # Edit directives are of the form:
1049: # append|newline - Appends a new line to the file.
1050: # replace|key|newline - Replaces the line with key value 'key'
1051: # delete|key - Deletes the line with key value 'key'.
1052: # $editor - A config file editor object that contains the
1053: # file being edited.
1054: #
1055: sub ApplyEdit {
1056:
1057: my ($directive, $editor) = @_;
1058:
1059: # Break the directive down into its command and its parameters
1060: # (at most two at this point. The meaning of the parameters, if in fact
1061: # they exist depends on the command).
1062:
1063: my ($command, $p1, $p2) = split(/\|/, $directive);
1064:
1065: if($command eq "append") {
1066: $editor->Append($p1); # p1 - key p2 null.
1067: } elsif ($command eq "replace") {
1068: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
1069: } elsif ($command eq "delete") {
1070: $editor->DeleteLine($p1); # p1 - key p2 null.
1071: } else { # Should not get here!!!
1072: die "Invalid command given to ApplyEdit $command"
1073: }
1074: }
1075: #
1076: # AdjustOurHost:
1077: # Adjusts a host file stored in a configuration file editor object
1078: # for the true IP address of this host. This is necessary for hosts
1079: # that live behind a firewall.
1080: # Those hosts have a publicly distributed IP of the firewall, but
1081: # internally must use their actual IP. We assume that a given
1082: # host only has a single IP interface for now.
1083: # Formal Parameters:
1084: # editor - The configuration file editor to adjust. This
1085: # editor is assumed to contain a hosts.tab file.
1086: # Strategy:
1087: # - Figure out our hostname.
1088: # - Lookup the entry for this host.
1089: # - Modify the line to contain our IP
1090: # - Do a replace for this host.
1091: sub AdjustOurHost {
1092: my $editor = shift;
1093:
1094: # figure out who I am.
1095:
1096: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
1097:
1098: # Get my host file entry.
1099:
1100: my $ConfigLine = $editor->Find($myHostName);
1101: if(! (defined $ConfigLine)) {
1102: die "AdjustOurHost - no entry for me in hosts file $myHostName";
1103: }
1104: # figure out my IP:
1105: # Use the config line to get my hostname.
1106: # Use gethostbyname to translate that into an IP address.
1107: #
1108: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1109: #
1110: # Reassemble the config line from the elements in the list.
1111: # Note that if the loncnew items were not present before, they will
1112: # be now even if they would be empty
1113: #
1114: my $newConfigLine = $id;
1115: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1116: $newConfigLine .= ":".$item;
1117: }
1118: # Replace the line:
1119:
1120: $editor->ReplaceLine($id, $newConfigLine);
1121:
1122: }
1123: #
1124: # ReplaceConfigFile:
1125: # Replaces a configuration file with the contents of a
1126: # configuration file editor object.
1127: # This is done by:
1128: # - Copying the target file to <filename>.old
1129: # - Writing the new file to <filename>.tmp
1130: # - Moving <filename.tmp> -> <filename>
1131: # This laborious process ensures that the system is never without
1132: # a configuration file that's at least valid (even if the contents
1133: # may be dated).
1134: # Parameters:
1135: # filename - Name of the file to modify... this is a full path.
1136: # editor - Editor containing the file.
1137: #
1138: sub ReplaceConfigFile {
1139:
1140: my ($filename, $editor) = @_;
1141:
1142: CopyFile ($filename, $filename.".old");
1143:
1144: my $contents = $editor->Get(); # Get the contents of the file.
1145:
1146: InstallFile($filename, $contents);
1147: }
1148: #
1149: #
1150: # Called to edit a configuration table file
1151: # Parameters:
1152: # request - The entire command/request sent by lonc or lonManage
1153: # Return:
1154: # The reply to send to the client.
1155: #
1156: sub EditFile {
1157: my $request = shift;
1158:
1159: # Split the command into it's pieces: edit:filetype:script
1160:
1161: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1162:
1163: # Check the pre-coditions for success:
1164:
1165: if($cmd != "edit") { # Something is amiss afoot alack.
1166: return "error:edit request detected, but request != 'edit'\n";
1167: }
1168: if( ($filetype ne "hosts") &&
1169: ($filetype ne "domain")) {
1170: return "error:edit requested with invalid file specifier: $filetype \n";
1171: }
1172:
1173: # Split the edit script and check it's validity.
1174:
1175: my @scriptlines = split(/\n/, $script); # one line per element.
1176: my $linecount = scalar(@scriptlines);
1177: for(my $i = 0; $i < $linecount; $i++) {
1178: chomp($scriptlines[$i]);
1179: if(!isValidEditCommand($scriptlines[$i])) {
1180: return "error:edit with bad script line: '$scriptlines[$i]' \n";
1181: }
1182: }
1183:
1184: # Execute the edit operation.
1185: # - Create a config file editor for the appropriate file and
1186: # - execute each command in the script:
1187: #
1188: my $configfile = ConfigFileFromSelector($filetype);
1189: if (!(defined $configfile)) {
1190: return "refused\n";
1191: }
1192: my $editor = ConfigFileEdit->new($configfile);
1193:
1194: for (my $i = 0; $i < $linecount; $i++) {
1195: ApplyEdit($scriptlines[$i], $editor);
1196: }
1197: # If the file is the host file, ensure that our host is
1198: # adjusted to have our ip:
1199: #
1200: if($filetype eq "host") {
1201: AdjustOurHost($editor);
1202: }
1203: # Finally replace the current file with our file.
1204: #
1205: ReplaceConfigFile($configfile, $editor);
1206:
1207: return "ok\n";
1208: }
1209:
1210: # read_profile
1211: #
1212: # Returns a set of specific entries from a user's profile file.
1213: # this is a utility function that is used by both get_profile_entry and
1214: # get_profile_entry_encrypted.
1215: #
1216: # Parameters:
1217: # udom - Domain in which the user exists.
1218: # uname - User's account name (loncapa account)
1219: # namespace - The profile namespace to open.
1220: # what - A set of & separated queries.
1221: # Returns:
1222: # If all ok: - The string that needs to be shipped back to the user.
1223: # If failure - A string that starts with error: followed by the failure
1224: # reason.. note that this probabyl gets shipped back to the
1225: # user as well.
1226: #
1227: sub read_profile {
1228: my ($udom, $uname, $namespace, $what) = @_;
1229:
1230: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1231: &GDBM_READER());
1232: if ($hashref) {
1233: my @queries=split(/\&/,$what);
1234: if ($namespace eq 'roles') {
1235: @queries = map { &unescape($_); } @queries;
1236: }
1237: my $qresult='';
1238:
1239: for (my $i=0;$i<=$#queries;$i++) {
1240: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1241: }
1242: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1243: if (&untie_user_hash($hashref)) {
1244: return $qresult;
1245: } else {
1246: return "error: ".($!+0)." untie (GDBM) Failed";
1247: }
1248: } else {
1249: if ($!+0 == 2) {
1250: return "error:No such file or GDBM reported bad block error";
1251: } else {
1252: return "error: ".($!+0)." tie (GDBM) Failed";
1253: }
1254: }
1255:
1256: }
1257: #--------------------- Request Handlers --------------------------------------------
1258: #
1259: # By convention each request handler registers itself prior to the sub
1260: # declaration:
1261: #
1262:
1263: #++
1264: #
1265: # Handles ping requests.
1266: # Parameters:
1267: # $cmd - the actual keyword that invoked us.
1268: # $tail - the tail of the request that invoked us.
1269: # $replyfd- File descriptor connected to the client
1270: # Implicit Inputs:
1271: # $currenthostid - Global variable that carries the name of the host we are
1272: # known as.
1273: # Returns:
1274: # 1 - Ok to continue processing.
1275: # 0 - Program should exit.
1276: # Side effects:
1277: # Reply information is sent to the client.
1278: sub ping_handler {
1279: my ($cmd, $tail, $client) = @_;
1280: Debug("$cmd $tail $client .. $currenthostid:");
1281:
1282: Reply( $client,\$currenthostid,"$cmd:$tail");
1283:
1284: return 1;
1285: }
1286: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1287:
1288: #++
1289: #
1290: # Handles pong requests. Pong replies with our current host id, and
1291: # the results of a ping sent to us via our lonc.
1292: #
1293: # Parameters:
1294: # $cmd - the actual keyword that invoked us.
1295: # $tail - the tail of the request that invoked us.
1296: # $replyfd- File descriptor connected to the client
1297: # Implicit Inputs:
1298: # $currenthostid - Global variable that carries the name of the host we are
1299: # connected to.
1300: # Returns:
1301: # 1 - Ok to continue processing.
1302: # 0 - Program should exit.
1303: # Side effects:
1304: # Reply information is sent to the client.
1305: sub pong_handler {
1306: my ($cmd, $tail, $replyfd) = @_;
1307:
1308: my $reply=&Apache::lonnet::reply("ping",$clientname);
1309: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1310: return 1;
1311: }
1312: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1313:
1314: #++
1315: # Called to establish an encrypted session key with the remote client.
1316: # Note that with secure lond, in most cases this function is never
1317: # invoked. Instead, the secure session key is established either
1318: # via a local file that's locked down tight and only lives for a short
1319: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1320: # bits from /dev/urandom, rather than the predictable pattern used by
1321: # by this sub. This sub is only used in the old-style insecure
1322: # key negotiation.
1323: # Parameters:
1324: # $cmd - the actual keyword that invoked us.
1325: # $tail - the tail of the request that invoked us.
1326: # $replyfd- File descriptor connected to the client
1327: # Implicit Inputs:
1328: # $currenthostid - Global variable that carries the name of the host
1329: # known as.
1330: # $clientname - Global variable that carries the name of the host we're connected to.
1331: # Returns:
1332: # 1 - Ok to continue processing.
1333: # 0 - Program should exit.
1334: # Implicit Outputs:
1335: # Reply information is sent to the client.
1336: # $cipher is set with a reference to a new IDEA encryption object.
1337: #
1338: sub establish_key_handler {
1339: my ($cmd, $tail, $replyfd) = @_;
1340:
1341: my $buildkey=time.$$.int(rand 100000);
1342: $buildkey=~tr/1-6/A-F/;
1343: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1344: my $key=$currenthostid.$clientname;
1345: $key=~tr/a-z/A-Z/;
1346: $key=~tr/G-P/0-9/;
1347: $key=~tr/Q-Z/0-9/;
1348: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1349: $key=substr($key,0,32);
1350: my $cipherkey=pack("H32",$key);
1351: $cipher=new IDEA $cipherkey;
1352: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1353:
1354: return 1;
1355:
1356: }
1357: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1358:
1359: # Handler for the load command. Returns the current system load average
1360: # to the requestor.
1361: #
1362: # Parameters:
1363: # $cmd - the actual keyword that invoked us.
1364: # $tail - the tail of the request that invoked us.
1365: # $replyfd- File descriptor connected to the client
1366: # Implicit Inputs:
1367: # $currenthostid - Global variable that carries the name of the host
1368: # known as.
1369: # $clientname - Global variable that carries the name of the host we're connected to.
1370: # Returns:
1371: # 1 - Ok to continue processing.
1372: # 0 - Program should exit.
1373: # Side effects:
1374: # Reply information is sent to the client.
1375: sub load_handler {
1376: my ($cmd, $tail, $replyfd) = @_;
1377:
1378:
1379:
1380: # Get the load average from /proc/loadavg and calculate it as a percentage of
1381: # the allowed load limit as set by the perl global variable lonLoadLim
1382:
1383: my $loadavg;
1384: my $loadfile=IO::File->new('/proc/loadavg');
1385:
1386: $loadavg=<$loadfile>;
1387: $loadavg =~ s/\s.*//g; # Extract the first field only.
1388:
1389: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1390:
1391: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1392:
1393: return 1;
1394: }
1395: ®ister_handler("load", \&load_handler, 0, 1, 0);
1396:
1397: #
1398: # Process the userload request. This sub returns to the client the current
1399: # user load average. It can be invoked either by clients or managers.
1400: #
1401: # Parameters:
1402: # $cmd - the actual keyword that invoked us.
1403: # $tail - the tail of the request that invoked us.
1404: # $replyfd- File descriptor connected to the client
1405: # Implicit Inputs:
1406: # $currenthostid - Global variable that carries the name of the host
1407: # known as.
1408: # $clientname - Global variable that carries the name of the host we're connected to.
1409: # Returns:
1410: # 1 - Ok to continue processing.
1411: # 0 - Program should exit
1412: # Implicit inputs:
1413: # whatever the userload() function requires.
1414: # Implicit outputs:
1415: # the reply is written to the client.
1416: #
1417: sub user_load_handler {
1418: my ($cmd, $tail, $replyfd) = @_;
1419:
1420: my $userloadpercent=&Apache::lonnet::userload();
1421: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1422:
1423: return 1;
1424: }
1425: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1426:
1427: # Process a request for the authorization type of a user:
1428: # (userauth).
1429: #
1430: # Parameters:
1431: # $cmd - the actual keyword that invoked us.
1432: # $tail - the tail of the request that invoked us.
1433: # $replyfd- File descriptor connected to the client
1434: # Returns:
1435: # 1 - Ok to continue processing.
1436: # 0 - Program should exit
1437: # Implicit outputs:
1438: # The user authorization type is written to the client.
1439: #
1440: sub user_authorization_type {
1441: my ($cmd, $tail, $replyfd) = @_;
1442:
1443: my $userinput = "$cmd:$tail";
1444:
1445: # Pull the domain and username out of the command tail.
1446: # and call get_auth_type to determine the authentication type.
1447:
1448: my ($udom,$uname)=split(/:/,$tail);
1449: my $result = &get_auth_type($udom, $uname);
1450: if($result eq "nouser") {
1451: &Failure( $replyfd, "unknown_user\n", $userinput);
1452: } else {
1453: #
1454: # We only want to pass the second field from get_auth_type
1455: # for ^krb.. otherwise we'll be handing out the encrypted
1456: # password for internals e.g.
1457: #
1458: my ($type,$otherinfo) = split(/:/,$result);
1459: if($type =~ /^krb/) {
1460: $type = $result;
1461: } else {
1462: $type .= ':';
1463: }
1464: &Reply( $replyfd, \$type, $userinput);
1465: }
1466:
1467: return 1;
1468: }
1469: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1470:
1471: # Process a request by a manager to push a hosts or domain table
1472: # to us. We pick apart the command and pass it on to the subs
1473: # that already exist to do this.
1474: #
1475: # Parameters:
1476: # $cmd - the actual keyword that invoked us.
1477: # $tail - the tail of the request that invoked us.
1478: # $client - File descriptor connected to the client
1479: # Returns:
1480: # 1 - Ok to continue processing.
1481: # 0 - Program should exit
1482: # Implicit Output:
1483: # a reply is written to the client.
1484: sub push_file_handler {
1485: my ($cmd, $tail, $client) = @_;
1486: &Debug("In push file handler");
1487: my $userinput = "$cmd:$tail";
1488:
1489: # At this time we only know that the IP of our partner is a valid manager
1490: # the code below is a hook to do further authentication (e.g. to resolve
1491: # spoofing).
1492:
1493: my $cert = &GetCertificate($userinput);
1494: if(&ValidManager($cert)) {
1495: &Debug("Valid manager: $client");
1496:
1497: # Now presumably we have the bona fides of both the peer host and the
1498: # process making the request.
1499:
1500: my $reply = &PushFile($userinput);
1501: &Reply($client, \$reply, $userinput);
1502:
1503: } else {
1504: &logthis("push_file_handler $client is not valid");
1505: &Failure( $client, "refused\n", $userinput);
1506: }
1507: return 1;
1508: }
1509: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1510:
1511: # The du_handler routine should be considered obsolete and is retained
1512: # for communication with legacy servers. Please see the du2_handler.
1513: #
1514: # du - list the disk usage of a directory recursively.
1515: #
1516: # note: stolen code from the ls file handler
1517: # under construction by Rick Banghart
1518: # .
1519: # Parameters:
1520: # $cmd - The command that dispatched us (du).
1521: # $ududir - The directory path to list... I'm not sure what this
1522: # is relative as things like ls:. return e.g.
1523: # no_such_dir.
1524: # $client - Socket open on the client.
1525: # Returns:
1526: # 1 - indicating that the daemon should not disconnect.
1527: # Side Effects:
1528: # The reply is written to $client.
1529: #
1530: sub du_handler {
1531: my ($cmd, $ududir, $client) = @_;
1532: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1533: my $userinput = "$cmd:$ududir";
1534:
1535: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1536: &Failure($client,"refused\n","$cmd:$ududir");
1537: return 1;
1538: }
1539: # Since $ududir could have some nasties in it,
1540: # we will require that ududir is a valid
1541: # directory. Just in case someone tries to
1542: # slip us a line like .;(cd /home/httpd rm -rf*)
1543: # etc.
1544: #
1545: if (-d $ududir) {
1546: my $total_size=0;
1547: my $code=sub {
1548: if ($_=~/\.\d+\./) { return;}
1549: if ($_=~/\.meta$/) { return;}
1550: if (-d $_) { return;}
1551: $total_size+=(stat($_))[7];
1552: };
1553: chdir($ududir);
1554: find($code,$ududir);
1555: $total_size=int($total_size/1024);
1556: &Reply($client,\$total_size,"$cmd:$ududir");
1557: } else {
1558: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1559: }
1560: return 1;
1561: }
1562: ®ister_handler("du", \&du_handler, 0, 1, 0);
1563:
1564: # Please also see the du_handler, which is obsoleted by du2.
1565: # du2_handler differs from du_handler in that required path to directory
1566: # provided by &propath() is prepended in the handler instead of on the
1567: # client side.
1568: #
1569: # du2 - list the disk usage of a directory recursively.
1570: #
1571: # Parameters:
1572: # $cmd - The command that dispatched us (du).
1573: # $tail - The tail of the request that invoked us.
1574: # $tail is a : separated list of the following:
1575: # - $ududir - directory path to list (before prepending)
1576: # - $getpropath = 1 if &propath() should prepend
1577: # - $uname - username to use for &propath or user dir
1578: # - $udom - domain to use for &propath or user dir
1579: # All are escaped.
1580: # $client - Socket open on the client.
1581: # Returns:
1582: # 1 - indicating that the daemon should not disconnect.
1583: # Side Effects:
1584: # The reply is written to $client.
1585: #
1586:
1587: sub du2_handler {
1588: my ($cmd, $tail, $client) = @_;
1589: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1590: my $userinput = "$cmd:$tail";
1591: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1592: &Failure($client,"refused\n","$cmd:$tail");
1593: return 1;
1594: }
1595: if ($getpropath) {
1596: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1597: $ududir = &propath($udom,$uname).'/'.$ududir;
1598: } else {
1599: &Failure($client,"refused\n","$cmd:$tail");
1600: return 1;
1601: }
1602: }
1603: # Since $ududir could have some nasties in it,
1604: # we will require that ududir is a valid
1605: # directory. Just in case someone tries to
1606: # slip us a line like .;(cd /home/httpd rm -rf*)
1607: # etc.
1608: #
1609: if (-d $ududir) {
1610: my $total_size=0;
1611: my $code=sub {
1612: if ($_=~/\.\d+\./) { return;}
1613: if ($_=~/\.meta$/) { return;}
1614: if (-d $_) { return;}
1615: $total_size+=(stat($_))[7];
1616: };
1617: chdir($ududir);
1618: find($code,$ududir);
1619: $total_size=int($total_size/1024);
1620: &Reply($client,\$total_size,"$cmd:$ududir");
1621: } else {
1622: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1623: }
1624: return 1;
1625: }
1626: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1627:
1628: #
1629: # The ls_handler routine should be considered obsolete and is retained
1630: # for communication with legacy servers. Please see the ls3_handler.
1631: #
1632: # ls - list the contents of a directory. For each file in the
1633: # selected directory the filename followed by the full output of
1634: # the stat function is returned. The returned info for each
1635: # file are separated by ':'. The stat fields are separated by &'s.
1636: #
1637: # If the requested path contains /../ or is:
1638: #
1639: # 1. for a directory, and the path does not begin with one of:
1640: # (a) /home/httpd/html/res/<domain>
1641: # (b) /home/httpd/html/userfiles/
1642: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1643: # or is:
1644: #
1645: # 2. for a file, and the path (after prepending) does not begin with one of:
1646: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1647: # (b) /home/httpd/html/res/<domain>/<username>/
1648: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1649: #
1650: # the response will be "refused".
1651: #
1652: # Parameters:
1653: # $cmd - The command that dispatched us (ls).
1654: # $ulsdir - The directory path to list... I'm not sure what this
1655: # is relative as things like ls:. return e.g.
1656: # no_such_dir.
1657: # $client - Socket open on the client.
1658: # Returns:
1659: # 1 - indicating that the daemon should not disconnect.
1660: # Side Effects:
1661: # The reply is written to $client.
1662: #
1663: sub ls_handler {
1664: # obsoleted by ls2_handler
1665: my ($cmd, $ulsdir, $client) = @_;
1666:
1667: my $userinput = "$cmd:$ulsdir";
1668:
1669: my $obs;
1670: my $rights;
1671: my $ulsout='';
1672: my $ulsfn;
1673: if ($ulsdir =~m{/\.\./}) {
1674: &Failure($client,"refused\n",$userinput);
1675: return 1;
1676: }
1677: if (-e $ulsdir) {
1678: if(-d $ulsdir) {
1679: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1680: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1681: &Failure($client,"refused\n",$userinput);
1682: return 1;
1683: }
1684: if (opendir(LSDIR,$ulsdir)) {
1685: while ($ulsfn=readdir(LSDIR)) {
1686: undef($obs);
1687: undef($rights);
1688: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1689: #We do some obsolete checking here
1690: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1691: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1692: my @obsolete=<FILE>;
1693: foreach my $obsolete (@obsolete) {
1694: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1695: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1696: }
1697: }
1698: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1699: if($obs eq '1') { $ulsout.="&1"; }
1700: else { $ulsout.="&0"; }
1701: if($rights eq '1') { $ulsout.="&1:"; }
1702: else { $ulsout.="&0:"; }
1703: }
1704: closedir(LSDIR);
1705: }
1706: } else {
1707: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1708: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1709: &Failure($client,"refused\n",$userinput);
1710: return 1;
1711: }
1712: my @ulsstats=stat($ulsdir);
1713: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1714: }
1715: } else {
1716: $ulsout='no_such_dir';
1717: }
1718: if ($ulsout eq '') { $ulsout='empty'; }
1719: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1720:
1721: return 1;
1722:
1723: }
1724: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1725:
1726: # The ls2_handler routine should be considered obsolete and is retained
1727: # for communication with legacy servers. Please see the ls3_handler.
1728: # Please also see the ls_handler, which was itself obsoleted by ls2.
1729: # ls2_handler differs from ls_handler in that it escapes its return
1730: # values before concatenating them together with ':'s.
1731: #
1732: # ls2 - list the contents of a directory. For each file in the
1733: # selected directory the filename followed by the full output of
1734: # the stat function is returned. The returned info for each
1735: # file are separated by ':'. The stat fields are separated by &'s.
1736: #
1737: # If the requested path contains /../ or is:
1738: #
1739: # 1. for a directory, and the path does not begin with one of:
1740: # (a) /home/httpd/html/res/<domain>
1741: # (b) /home/httpd/html/userfiles/
1742: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1743: # or is:
1744: #
1745: # 2. for a file, and the path (after prepending) does not begin with one of:
1746: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1747: # (b) /home/httpd/html/res/<domain>/<username>/
1748: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1749: #
1750: # the response will be "refused".
1751: #
1752: # Parameters:
1753: # $cmd - The command that dispatched us (ls).
1754: # $ulsdir - The directory path to list... I'm not sure what this
1755: # is relative as things like ls:. return e.g.
1756: # no_such_dir.
1757: # $client - Socket open on the client.
1758: # Returns:
1759: # 1 - indicating that the daemon should not disconnect.
1760: # Side Effects:
1761: # The reply is written to $client.
1762: #
1763: sub ls2_handler {
1764: my ($cmd, $ulsdir, $client) = @_;
1765:
1766: my $userinput = "$cmd:$ulsdir";
1767:
1768: my $obs;
1769: my $rights;
1770: my $ulsout='';
1771: my $ulsfn;
1772: if ($ulsdir =~m{/\.\./}) {
1773: &Failure($client,"refused\n",$userinput);
1774: return 1;
1775: }
1776: if (-e $ulsdir) {
1777: if(-d $ulsdir) {
1778: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1779: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1780: &Failure($client,"refused\n","$userinput");
1781: return 1;
1782: }
1783: if (opendir(LSDIR,$ulsdir)) {
1784: while ($ulsfn=readdir(LSDIR)) {
1785: undef($obs);
1786: undef($rights);
1787: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1788: #We do some obsolete checking here
1789: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1790: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1791: my @obsolete=<FILE>;
1792: foreach my $obsolete (@obsolete) {
1793: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1794: if($obsolete =~ m|(<copyright>)(default)|) {
1795: $rights = 1;
1796: }
1797: }
1798: }
1799: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1800: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1801: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1802: $ulsout.= &escape($tmp).':';
1803: }
1804: closedir(LSDIR);
1805: }
1806: } else {
1807: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1808: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1809: &Failure($client,"refused\n",$userinput);
1810: return 1;
1811: }
1812: my @ulsstats=stat($ulsdir);
1813: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1814: }
1815: } else {
1816: $ulsout='no_such_dir';
1817: }
1818: if ($ulsout eq '') { $ulsout='empty'; }
1819: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1820: return 1;
1821: }
1822: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1823: #
1824: # ls3 - list the contents of a directory. For each file in the
1825: # selected directory the filename followed by the full output of
1826: # the stat function is returned. The returned info for each
1827: # file are separated by ':'. The stat fields are separated by &'s.
1828: #
1829: # If the requested path (after prepending) contains /../ or is:
1830: #
1831: # 1. for a directory, and the path does not begin with one of:
1832: # (a) /home/httpd/html/res/<domain>
1833: # (b) /home/httpd/html/userfiles/
1834: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1835: # (d) /home/httpd/html/priv/<domain> and client is the homeserver
1836: #
1837: # or is:
1838: #
1839: # 2. for a file, and the path (after prepending) does not begin with one of:
1840: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1841: # (b) /home/httpd/html/res/<domain>/<username>/
1842: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1843: # (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver
1844: #
1845: # the response will be "refused".
1846: #
1847: # Parameters:
1848: # $cmd - The command that dispatched us (ls).
1849: # $tail - The tail of the request that invoked us.
1850: # $tail is a : separated list of the following:
1851: # - $ulsdir - directory path to list (before prepending)
1852: # - $getpropath = 1 if &propath() should prepend
1853: # - $getuserdir = 1 if path to user dir in lonUsers should
1854: # prepend
1855: # - $alternate_root - path to prepend
1856: # - $uname - username to use for &propath or user dir
1857: # - $udom - domain to use for &propath or user dir
1858: # All of these except $getpropath and &getuserdir are escaped.
1859: # no_such_dir.
1860: # $client - Socket open on the client.
1861: # Returns:
1862: # 1 - indicating that the daemon should not disconnect.
1863: # Side Effects:
1864: # The reply is written to $client.
1865: #
1866:
1867: sub ls3_handler {
1868: my ($cmd, $tail, $client) = @_;
1869: my $userinput = "$cmd:$tail";
1870: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1871: split(/:/,$tail);
1872: if (defined($ulsdir)) {
1873: $ulsdir = &unescape($ulsdir);
1874: }
1875: if (defined($alternate_root)) {
1876: $alternate_root = &unescape($alternate_root);
1877: }
1878: if (defined($uname)) {
1879: $uname = &unescape($uname);
1880: }
1881: if (defined($udom)) {
1882: $udom = &unescape($udom);
1883: }
1884:
1885: my $dir_root = $perlvar{'lonDocRoot'};
1886: if (($getpropath) || ($getuserdir)) {
1887: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1888: $dir_root = &propath($udom,$uname);
1889: $dir_root =~ s/\/$//;
1890: } else {
1891: &Failure($client,"refused\n",$userinput);
1892: return 1;
1893: }
1894: } elsif ($alternate_root ne '') {
1895: $dir_root = $alternate_root;
1896: }
1897: if (($dir_root ne '') && ($dir_root ne '/')) {
1898: if ($ulsdir =~ /^\//) {
1899: $ulsdir = $dir_root.$ulsdir;
1900: } else {
1901: $ulsdir = $dir_root.'/'.$ulsdir;
1902: }
1903: }
1904: if ($ulsdir =~m{/\.\./}) {
1905: &Failure($client,"refused\n",$userinput);
1906: return 1;
1907: }
1908: my $islocal;
1909: my @machine_ids = &Apache::lonnet::current_machine_ids();
1910: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
1911: $islocal = 1;
1912: }
1913: my $obs;
1914: my $rights;
1915: my $ulsout='';
1916: my $ulsfn;
1917:
1918: my ($crscheck,$toplevel,$currdom,$currnum,$skip);
1919: unless ($islocal) {
1920: my ($major,$minor) = split(/\./,$clientversion);
1921: if (($major < 2) || ($major == 2 && $minor < 12)) {
1922: $crscheck = 1;
1923: }
1924: }
1925: if (-e $ulsdir) {
1926: if(-d $ulsdir) {
1927: unless (($getpropath) || ($getuserdir) ||
1928: ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1929: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) ||
1930: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) {
1931: &Failure($client,"refused\n",$userinput);
1932: return 1;
1933: }
1934: if (($crscheck) &&
1935: ($ulsdir =~ m{^/home/httpd/html/res/($LONCAPA::match_domain)(/?$|/$LONCAPA::match_courseid)})) {
1936: ($currdom,my $posscnum) = ($1,$2);
1937: if (($posscnum eq '') || ($posscnum eq '/')) {
1938: $toplevel = 1;
1939: } else {
1940: $posscnum =~ s{^/+}{};
1941: if (&LONCAPA::Lond::is_course($currdom,$posscnum)) {
1942: $skip = 1;
1943: }
1944: }
1945: }
1946: if ((!$skip) && (opendir(LSDIR,$ulsdir))) {
1947: while ($ulsfn=readdir(LSDIR)) {
1948: if (($crscheck) && ($toplevel) && ($currdom ne '') &&
1949: ($ulsfn =~ /^$LONCAPA::match_courseid$/) && (-d "$ulsdir/$ulsfn")) {
1950: if (&LONCAPA::Lond::is_course($currdom,$ulsfn)) {
1951: next;
1952: }
1953: }
1954: undef($obs);
1955: undef($rights);
1956: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1957: #We do some obsolete checking here
1958: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1959: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1960: my @obsolete=<FILE>;
1961: foreach my $obsolete (@obsolete) {
1962: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1963: if($obsolete =~ m|(<copyright>)(default)|) {
1964: $rights = 1;
1965: }
1966: }
1967: }
1968: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1969: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1970: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1971: $ulsout.= &escape($tmp).':';
1972: }
1973: closedir(LSDIR);
1974: }
1975: } else {
1976: unless (($getpropath) || ($getuserdir) ||
1977: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1978: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) ||
1979: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) {
1980: &Failure($client,"refused\n",$userinput);
1981: return 1;
1982: }
1983: my @ulsstats=stat($ulsdir);
1984: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1985: }
1986: } else {
1987: $ulsout='no_such_dir';
1988: }
1989: if ($ulsout eq '') { $ulsout='empty'; }
1990: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1991: return 1;
1992: }
1993: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1994:
1995: sub read_lonnet_global {
1996: my ($cmd,$tail,$client) = @_;
1997: my $userinput = "$cmd:$tail";
1998: my $requested = &Apache::lonnet::thaw_unescape($tail);
1999: my $result;
2000: my %packagevars = (
2001: spareid => \%Apache::lonnet::spareid,
2002: perlvar => \%Apache::lonnet::perlvar,
2003: );
2004: my %limit_to = (
2005: perlvar => {
2006: lonOtherAuthen => 1,
2007: lonBalancer => 1,
2008: lonVersion => 1,
2009: lonAdmEMail => 1,
2010: lonSupportEMail => 1,
2011: lonSysEMail => 1,
2012: lonHostID => 1,
2013: lonRole => 1,
2014: lonDefDomain => 1,
2015: lonLoadLim => 1,
2016: lonUserLoadLim => 1,
2017: }
2018: );
2019: if (ref($requested) eq 'HASH') {
2020: foreach my $what (keys(%{$requested})) {
2021: my $response;
2022: my $items = {};
2023: if (exists($packagevars{$what})) {
2024: if (ref($limit_to{$what}) eq 'HASH') {
2025: foreach my $varname (keys(%{$packagevars{$what}})) {
2026: if ($limit_to{$what}{$varname}) {
2027: $items->{$varname} = $packagevars{$what}{$varname};
2028: }
2029: }
2030: } else {
2031: $items = $packagevars{$what};
2032: }
2033: if ($what eq 'perlvar') {
2034: if (!exists($packagevars{$what}{'lonBalancer'})) {
2035: if ($dist =~ /^(centos|rhes|fedora|scientific|oracle)/) {
2036: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
2037: if (ref($othervarref) eq 'HASH') {
2038: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
2039: }
2040: }
2041: }
2042: }
2043: $response = &Apache::lonnet::freeze_escape($items);
2044: }
2045: $result .= &escape($what).'='.$response.'&';
2046: }
2047: }
2048: $result =~ s/\&$//;
2049: &Reply($client,\$result,$userinput);
2050: return 1;
2051: }
2052: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
2053:
2054: sub server_devalidatecache_handler {
2055: my ($cmd,$tail,$client) = @_;
2056: my $userinput = "$cmd:$tail";
2057: my $items = &unescape($tail);
2058: my @cached = split(/\&/,$items);
2059: foreach my $key (@cached) {
2060: if ($key =~ /:/) {
2061: my ($name,$id) = map { &unescape($_); } split(/:/,$key);
2062: &Apache::lonnet::devalidate_cache_new($name,$id);
2063: }
2064: }
2065: my $result = 'ok';
2066: &Reply($client,\$result,$userinput);
2067: return 1;
2068: }
2069: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
2070:
2071: sub server_timezone_handler {
2072: my ($cmd,$tail,$client) = @_;
2073: my $userinput = "$cmd:$tail";
2074: my $timezone;
2075: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
2076: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
2077: if (-e $clockfile) {
2078: if (open(my $fh,"<$clockfile")) {
2079: while (<$fh>) {
2080: next if (/^[\#\s]/);
2081: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
2082: $timezone = $1;
2083: last;
2084: }
2085: }
2086: close($fh);
2087: }
2088: } elsif (-e $tzfile) {
2089: if (open(my $fh,"<$tzfile")) {
2090: $timezone = <$fh>;
2091: close($fh);
2092: chomp($timezone);
2093: if ($timezone =~ m{^Etc/(\w+)$}) {
2094: $timezone = $1;
2095: }
2096: }
2097: }
2098: &Reply($client,\$timezone,$userinput); # This supports debug logging.
2099: return 1;
2100: }
2101: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
2102:
2103: sub server_loncaparev_handler {
2104: my ($cmd,$tail,$client) = @_;
2105: my $userinput = "$cmd:$tail";
2106: &Reply($client,\$perlvar{'lonVersion'},$userinput);
2107: return 1;
2108: }
2109: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
2110:
2111: sub server_homeID_handler {
2112: my ($cmd,$tail,$client) = @_;
2113: my $userinput = "$cmd:$tail";
2114: &Reply($client,\$perlvar{'lonHostID'},$userinput);
2115: return 1;
2116: }
2117: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
2118:
2119: sub server_distarch_handler {
2120: my ($cmd,$tail,$client) = @_;
2121: my $userinput = "$cmd:$tail";
2122: my $reply = &distro_and_arch();
2123: &Reply($client,\$reply,$userinput);
2124: return 1;
2125: }
2126: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
2127:
2128: sub server_certs_handler {
2129: my ($cmd,$tail,$client) = @_;
2130: my $userinput = "$cmd:$tail";
2131: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
2132: my $result = &LONCAPA::Lond::server_certs(\%perlvar,$perlvar{'lonHostID'},$hostname);
2133: &Reply($client,\$result,$userinput);
2134: return;
2135: }
2136: ®ister_handler("servercerts", \&server_certs_handler, 0, 1, 0);
2137:
2138: # Process a reinit request. Reinit requests that either
2139: # lonc or lond be reinitialized so that an updated
2140: # host.tab or domain.tab can be processed.
2141: #
2142: # Parameters:
2143: # $cmd - the actual keyword that invoked us.
2144: # $tail - the tail of the request that invoked us.
2145: # $client - File descriptor connected to the client
2146: # Returns:
2147: # 1 - Ok to continue processing.
2148: # 0 - Program should exit
2149: # Implicit output:
2150: # a reply is sent to the client.
2151: #
2152: sub reinit_process_handler {
2153: my ($cmd, $tail, $client) = @_;
2154:
2155: my $userinput = "$cmd:$tail";
2156:
2157: my $cert = &GetCertificate($userinput);
2158: if(&ValidManager($cert)) {
2159: chomp($userinput);
2160: my $reply = &ReinitProcess($userinput);
2161: &Reply( $client, \$reply, $userinput);
2162: } else {
2163: &Failure( $client, "refused\n", $userinput);
2164: }
2165: return 1;
2166: }
2167: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
2168:
2169: # Process the editing script for a table edit operation.
2170: # the editing operation must be encrypted and requested by
2171: # a manager host.
2172: #
2173: # Parameters:
2174: # $cmd - the actual keyword that invoked us.
2175: # $tail - the tail of the request that invoked us.
2176: # $client - File descriptor connected to the client
2177: # Returns:
2178: # 1 - Ok to continue processing.
2179: # 0 - Program should exit
2180: # Implicit output:
2181: # a reply is sent to the client.
2182: #
2183: sub edit_table_handler {
2184: my ($command, $tail, $client) = @_;
2185:
2186: my $userinput = "$command:$tail";
2187:
2188: my $cert = &GetCertificate($userinput);
2189: if(&ValidManager($cert)) {
2190: my($filetype, $script) = split(/:/, $tail);
2191: if (($filetype eq "hosts") ||
2192: ($filetype eq "domain")) {
2193: if($script ne "") {
2194: &Reply($client, # BUGBUG - EditFile
2195: &EditFile($userinput), # could fail.
2196: $userinput);
2197: } else {
2198: &Failure($client,"refused\n",$userinput);
2199: }
2200: } else {
2201: &Failure($client,"refused\n",$userinput);
2202: }
2203: } else {
2204: &Failure($client,"refused\n",$userinput);
2205: }
2206: return 1;
2207: }
2208: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
2209:
2210: #
2211: # Authenticate a user against the LonCAPA authentication
2212: # database. Note that there are several authentication
2213: # possibilities:
2214: # - unix - The user can be authenticated against the unix
2215: # password file.
2216: # - internal - The user can be authenticated against a purely
2217: # internal per user password file.
2218: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
2219: # ticket granting authority.
2220: # - user - The person tailoring LonCAPA can supply a user authentication
2221: # mechanism that is per system.
2222: #
2223: # Parameters:
2224: # $cmd - The command that got us here.
2225: # $tail - Tail of the command (remaining parameters).
2226: # $client - File descriptor connected to client.
2227: # Returns
2228: # 0 - Requested to exit, caller should shut down.
2229: # 1 - Continue processing.
2230: # Implicit inputs:
2231: # The authentication systems describe above have their own forms of implicit
2232: # input into the authentication process that are described above.
2233: #
2234: sub authenticate_handler {
2235: my ($cmd, $tail, $client) = @_;
2236:
2237:
2238: # Regenerate the full input line
2239:
2240: my $userinput = $cmd.":".$tail;
2241:
2242: # udom - User's domain.
2243: # uname - Username.
2244: # upass - User's password.
2245: # checkdefauth - Pass to validate_user() to try authentication
2246: # with default auth type(s) if no user account.
2247: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
2248: # to check if session can be hosted.
2249:
2250: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
2251: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
2252: chomp($upass);
2253: $upass=&unescape($upass);
2254:
2255: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
2256: if($pwdcorrect) {
2257: my $canhost = 1;
2258: unless ($clientcancheckhost) {
2259: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
2260: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
2261: my @intdoms;
2262: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
2263: if (ref($internet_names) eq 'ARRAY') {
2264: @intdoms = @{$internet_names};
2265: }
2266: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
2267: my ($remote,$hosted);
2268: my $remotesession = &get_usersession_config($udom,'remotesession');
2269: if (ref($remotesession) eq 'HASH') {
2270: $remote = $remotesession->{'remote'};
2271: }
2272: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
2273: if (ref($hostedsession) eq 'HASH') {
2274: $hosted = $hostedsession->{'hosted'};
2275: }
2276: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
2277: $clientversion,
2278: $remote,$hosted);
2279: }
2280: }
2281: if ($canhost) {
2282: &Reply( $client, "authorized\n", $userinput);
2283: } else {
2284: &Reply( $client, "not_allowed_to_host\n", $userinput);
2285: }
2286: #
2287: # Bad credentials: Failed to authorize
2288: #
2289: } else {
2290: &Failure( $client, "non_authorized\n", $userinput);
2291: }
2292:
2293: return 1;
2294: }
2295: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
2296:
2297: #
2298: # Change a user's password. Note that this function is complicated by
2299: # the fact that a user may be authenticated in more than one way:
2300: # At present, we are not able to change the password for all types of
2301: # authentication methods. Only for:
2302: # unix - unix password or shadow passoword style authentication.
2303: # local - Locally written authentication mechanism.
2304: # For now, kerb4 and kerb5 password changes are not supported and result
2305: # in an error.
2306: # FUTURE WORK:
2307: # Support kerberos passwd changes?
2308: # Parameters:
2309: # $cmd - The command that got us here.
2310: # $tail - Tail of the command (remaining parameters).
2311: # $client - File descriptor connected to client.
2312: # Returns
2313: # 0 - Requested to exit, caller should shut down.
2314: # 1 - Continue processing.
2315: # Implicit inputs:
2316: # The authentication systems describe above have their own forms of implicit
2317: # input into the authentication process that are described above.
2318: sub change_password_handler {
2319: my ($cmd, $tail, $client) = @_;
2320:
2321: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
2322:
2323: #
2324: # udom - user's domain.
2325: # uname - Username.
2326: # upass - Current password.
2327: # npass - New password.
2328: # context - Context in which this was called
2329: # (preferences or reset_by_email).
2330: # lonhost - HostID of server where request originated
2331:
2332: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
2333:
2334: $upass=&unescape($upass);
2335: $npass=&unescape($npass);
2336: &Debug("Trying to change password for $uname");
2337:
2338: # First require that the user can be authenticated with their
2339: # old password unless context was 'reset_by_email':
2340:
2341: my ($validated,$failure);
2342: if ($context eq 'reset_by_email') {
2343: if ($lonhost eq '') {
2344: $failure = 'invalid_client';
2345: } else {
2346: $validated = 1;
2347: }
2348: } else {
2349: $validated = &validate_user($udom, $uname, $upass);
2350: }
2351: if($validated) {
2352: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
2353: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2354: my $notunique;
2355: if ($howpwd eq 'internal') {
2356: &Debug("internal auth");
2357: my $ncpass = &hash_passwd($udom,$npass);
2358: my (undef,$method,@rest) = split(/!/,$contentpwd);
2359: if ($method eq 'bcrypt') {
2360: my %passwdconf = &Apache::lonnet::get_passwdconf($udom);
2361: if (($passwdconf{'numsaved'}) && ($passwdconf{'numsaved'} =~ /^\d+$/)) {
2362: my @oldpasswds;
2363: my $userpath = &propath($udom,$uname);
2364: my $fullpath = $userpath.'/oldpasswds';
2365: if (-d $userpath) {
2366: my @oldfiles;
2367: if (-e $fullpath) {
2368: if (opendir(my $dir,$fullpath)) {
2369: (@oldfiles) = grep(/^\d+$/,readdir($dir));
2370: closedir($dir);
2371: }
2372: if (@oldfiles) {
2373: @oldfiles = sort { $b <=> $a } (@oldfiles);
2374: my $numremoved = 0;
2375: for (my $i=0; $i<@oldfiles; $i++) {
2376: if ($i>=$passwdconf{'numsaved'}) {
2377: if (-f "$fullpath/$oldfiles[$i]") {
2378: if (unlink("$fullpath/$oldfiles[$i]")) {
2379: $numremoved ++;
2380: }
2381: }
2382: } elsif (open(my $fh,'<',"$fullpath/$oldfiles[$i]")) {
2383: while (my $line = <$fh>) {
2384: push(@oldpasswds,$line);
2385: }
2386: close($fh);
2387: }
2388: }
2389: if ($numremoved) {
2390: &logthis("unlinked $numremoved old password files for $uname:$udom");
2391: }
2392: }
2393: }
2394: push(@oldpasswds,$contentpwd);
2395: foreach my $item (@oldpasswds) {
2396: my (undef,$method,@rest) = split(/!/,$item);
2397: if ($method eq 'bcrypt') {
2398: my $result = &hash_passwd($udom,$npass,@rest);
2399: if ($result eq $item) {
2400: $notunique = 1;
2401: last;
2402: }
2403: }
2404: }
2405: unless ($notunique) {
2406: unless (-e $fullpath) {
2407: if (&mkpath("$fullpath/")) {
2408: chmod(0700,$fullpath);
2409: }
2410: }
2411: if (-d $fullpath) {
2412: my $now = time;
2413: if (open(my $fh,'>',"$fullpath/$now")) {
2414: print $fh $contentpwd;
2415: close($fh);
2416: chmod(0400,"$fullpath/$now");
2417: }
2418: }
2419: }
2420: }
2421: }
2422: }
2423: if ($notunique) {
2424: my $msg="Result of password change for $uname:$udom - password matches one used before";
2425: if ($lonhost) {
2426: $msg .= " - request originated from: $lonhost";
2427: }
2428: &logthis($msg);
2429: &Reply($client, "prioruse\n", $userinput);
2430: } elsif (&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
2431: my $msg="Result of password change for $uname: pwchange_success";
2432: if ($lonhost) {
2433: $msg .= " - request originated from: $lonhost";
2434: }
2435: &logthis($msg);
2436: &update_passwd_history($uname,$udom,$howpwd,$context);
2437: &Reply($client, "ok\n", $userinput);
2438: } else {
2439: &logthis("Unable to open $uname passwd "
2440: ."to change password");
2441: &Failure( $client, "non_authorized\n",$userinput);
2442: }
2443: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2444: my $result = &change_unix_password($uname, $npass);
2445: if ($result eq 'ok') {
2446: &update_passwd_history($uname,$udom,$howpwd,$context);
2447: }
2448: &logthis("Result of password change for $uname: ".
2449: $result);
2450: &Reply($client, \$result, $userinput);
2451: } else {
2452: # this just means that the current password mode is not
2453: # one we know how to change (e.g the kerberos auth modes or
2454: # locally written auth handler).
2455: #
2456: &Failure( $client, "auth_mode_error\n", $userinput);
2457: }
2458: } else {
2459: if ($failure eq '') {
2460: $failure = 'non_authorized';
2461: }
2462: &Failure( $client, "$failure\n", $userinput);
2463: }
2464:
2465: return 1;
2466: }
2467: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2468:
2469: sub hash_passwd {
2470: my ($domain,$plainpass,@rest) = @_;
2471: my ($salt,$cost);
2472: if (@rest) {
2473: $cost = $rest[0];
2474: # salt is first 22 characters, base-64 encoded by bcrypt
2475: my $plainsalt = substr($rest[1],0,22);
2476: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
2477: } else {
2478: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
2479: my $defaultcost = $domdefaults{'intauth_cost'};
2480: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
2481: $cost = 10;
2482: } else {
2483: $cost = $defaultcost;
2484: }
2485: # Generate random 16-octet base64 salt
2486: $salt = "";
2487: $salt .= pack("C", int rand(256)) for 1..16;
2488: }
2489: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
2490: key_nul => 1,
2491: cost => $cost,
2492: salt => $salt,
2493: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
2494:
2495: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
2496: &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
2497: &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
2498: return $result;
2499: }
2500:
2501: #
2502: # Create a new user. User in this case means a lon-capa user.
2503: # The user must either already exist in some authentication realm
2504: # like kerberos or the /etc/passwd. If not, a user completely local to
2505: # this loncapa system is created.
2506: #
2507: # Parameters:
2508: # $cmd - The command that got us here.
2509: # $tail - Tail of the command (remaining parameters).
2510: # $client - File descriptor connected to client.
2511: # Returns
2512: # 0 - Requested to exit, caller should shut down.
2513: # 1 - Continue processing.
2514: # Implicit inputs:
2515: # The authentication systems describe above have their own forms of implicit
2516: # input into the authentication process that are described above.
2517: sub add_user_handler {
2518:
2519: my ($cmd, $tail, $client) = @_;
2520:
2521:
2522: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2523: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2524:
2525: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2526:
2527:
2528: if($udom eq $currentdomainid) { # Reject new users for other domains...
2529:
2530: my $oldumask=umask(0077);
2531: chomp($npass);
2532: $npass=&unescape($npass);
2533: my $passfilename = &password_path($udom, $uname);
2534: &Debug("Password file created will be:".$passfilename);
2535: if (-e $passfilename) {
2536: &Failure( $client, "already_exists\n", $userinput);
2537: } else {
2538: my $fperror='';
2539: if (!&mkpath($passfilename)) {
2540: $fperror="error: ".($!+0)." mkdir failed while attempting "
2541: ."makeuser";
2542: }
2543: unless ($fperror) {
2544: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2545: $passfilename,'makeuser');
2546: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2547: } else {
2548: &Failure($client, \$fperror, $userinput);
2549: }
2550: }
2551: umask($oldumask);
2552: } else {
2553: &Failure($client, "not_right_domain\n",
2554: $userinput); # Even if we are multihomed.
2555:
2556: }
2557: return 1;
2558:
2559: }
2560: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2561:
2562: #
2563: # Change the authentication method of a user. Note that this may
2564: # also implicitly change the user's password if, for example, the user is
2565: # joining an existing authentication realm. Known authentication realms at
2566: # this time are:
2567: # internal - Purely internal password file (only loncapa knows this user)
2568: # local - Institutionally written authentication module.
2569: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2570: # kerb4 - kerberos version 4
2571: # kerb5 - kerberos version 5
2572: #
2573: # Parameters:
2574: # $cmd - The command that got us here.
2575: # $tail - Tail of the command (remaining parameters).
2576: # $client - File descriptor connected to client.
2577: # Returns
2578: # 0 - Requested to exit, caller should shut down.
2579: # 1 - Continue processing.
2580: # Implicit inputs:
2581: # The authentication systems describe above have their own forms of implicit
2582: # input into the authentication process that are described above.
2583: # NOTE:
2584: # This is also used to change the authentication credential values (e.g. passwd).
2585: #
2586: #
2587: sub change_authentication_handler {
2588:
2589: my ($cmd, $tail, $client) = @_;
2590:
2591: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2592:
2593: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2594: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2595: if ($udom ne $currentdomainid) {
2596: &Failure( $client, "not_right_domain\n", $client);
2597: } else {
2598:
2599: chomp($npass);
2600:
2601: $npass=&unescape($npass);
2602: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2603: my $passfilename = &password_path($udom, $uname);
2604: if ($passfilename) { # Not allowed to create a new user!!
2605: # If just changing the unix passwd. need to arrange to run
2606: # passwd since otherwise make_passwd_file will fail as
2607: # creation of unix authenticated users is no longer supported
2608: # except from the command line, when running make_domain_coordinator.pl
2609:
2610: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2611: my $result = &change_unix_password($uname, $npass);
2612: &logthis("Result of password change for $uname: ".$result);
2613: if ($result eq "ok") {
2614: &update_passwd_history($uname,$udom,$umode,'changeuserauth');
2615: &Reply($client, \$result);
2616: } else {
2617: &Failure($client, \$result);
2618: }
2619: } else {
2620: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2621: $passfilename,'changeuserauth');
2622: #
2623: # If the current auth mode is internal, and the old auth mode was
2624: # unix, or krb*, and the user is an author for this domain,
2625: # re-run manage_permissions for that role in order to be able
2626: # to take ownership of the construction space back to www:www
2627: #
2628:
2629:
2630: &Reply($client, \$result, $userinput);
2631: }
2632:
2633:
2634: } else {
2635: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2636: }
2637: }
2638: return 1;
2639: }
2640: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2641:
2642: sub update_passwd_history {
2643: my ($uname,$udom,$umode,$context) = @_;
2644: my $proname=&propath($udom,$uname);
2645: my $now = time;
2646: if (open(my $fh,">>$proname/passwd.log")) {
2647: print $fh "$now:$umode:$context\n";
2648: close($fh);
2649: }
2650: return;
2651: }
2652:
2653: #
2654: # Determines if this is the home server for a user. The home server
2655: # for a user will have his/her lon-capa passwd file. Therefore all we need
2656: # to do is determine if this file exists.
2657: #
2658: # Parameters:
2659: # $cmd - The command that got us here.
2660: # $tail - Tail of the command (remaining parameters).
2661: # $client - File descriptor connected to client.
2662: # Returns
2663: # 0 - Requested to exit, caller should shut down.
2664: # 1 - Continue processing.
2665: # Implicit inputs:
2666: # The authentication systems describe above have their own forms of implicit
2667: # input into the authentication process that are described above.
2668: #
2669: sub is_home_handler {
2670: my ($cmd, $tail, $client) = @_;
2671:
2672: my $userinput = "$cmd:$tail";
2673:
2674: my ($udom,$uname)=split(/:/,$tail);
2675: chomp($uname);
2676: my $passfile = &password_filename($udom, $uname);
2677: if($passfile) {
2678: &Reply( $client, "found\n", $userinput);
2679: } else {
2680: &Failure($client, "not_found\n", $userinput);
2681: }
2682: return 1;
2683: }
2684: ®ister_handler("home", \&is_home_handler, 0,1,0);
2685:
2686: #
2687: # Process an update request for a resource.
2688: # A resource has been modified that we hold a subscription to.
2689: # If the resource is not local, then we must update, or at least invalidate our
2690: # cached copy of the resource.
2691: # Parameters:
2692: # $cmd - The command that got us here.
2693: # $tail - Tail of the command (remaining parameters).
2694: # $client - File descriptor connected to client.
2695: # Returns
2696: # 0 - Requested to exit, caller should shut down.
2697: # 1 - Continue processing.
2698: # Implicit inputs:
2699: # The authentication systems describe above have their own forms of implicit
2700: # input into the authentication process that are described above.
2701: #
2702: sub update_resource_handler {
2703:
2704: my ($cmd, $tail, $client) = @_;
2705:
2706: my $userinput = "$cmd:$tail";
2707:
2708: my $fname= $tail; # This allows interactive testing
2709:
2710:
2711: my $ownership=ishome($fname);
2712: if ($ownership eq 'not_owner') {
2713: if (-e $fname) {
2714: # Delete preview file, if exists
2715: unlink("$fname.tmp");
2716: # Get usage stats
2717: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2718: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2719: my $now=time;
2720: my $since=$now-$atime;
2721: # If the file has not been used within lonExpire seconds,
2722: # unsubscribe from it and delete local copy
2723: if ($since>$perlvar{'lonExpire'}) {
2724: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2725: &devalidate_meta_cache($fname);
2726: unlink("$fname");
2727: unlink("$fname.meta");
2728: } else {
2729: # Yes, this is in active use. Get a fresh copy. Since it might be in
2730: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2731: my $transname="$fname.in.transfer";
2732: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2733: my $response;
2734: # FIXME: cannot replicate files that take more than two minutes to transfer -- needs checking now 1200s timeout used
2735: # for LWP request.
2736: my $request=new HTTP::Request('GET',"$remoteurl");
2737: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
2738: if ($response->is_error()) {
2739: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2740: &devalidate_meta_cache($fname);
2741: if (-e $transname) {
2742: unlink($transname);
2743: }
2744: unlink($fname);
2745: my $message=$response->status_line;
2746: &logthis("LWP GET: $message for $fname ($remoteurl)");
2747: } else {
2748: if ($remoteurl!~/\.meta$/) {
2749: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2750: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
2751: if ($mresponse->is_error()) {
2752: unlink($fname.'.meta');
2753: }
2754: }
2755: # we successfully transfered, copy file over to real name
2756: rename($transname,$fname);
2757: &devalidate_meta_cache($fname);
2758: }
2759: }
2760: &Reply( $client, "ok\n", $userinput);
2761: } else {
2762: &Failure($client, "not_found\n", $userinput);
2763: }
2764: } else {
2765: &Failure($client, "rejected\n", $userinput);
2766: }
2767: return 1;
2768: }
2769: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2770:
2771: sub devalidate_meta_cache {
2772: my ($url) = @_;
2773: use Cache::Memcached;
2774: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2775: $url = &Apache::lonnet::declutter($url);
2776: $url =~ s-\.meta$--;
2777: my $id = &escape('meta:'.$url);
2778: $memcache->delete($id);
2779: }
2780:
2781: #
2782: # Fetch a user file from a remote server to the user's home directory
2783: # userfiles subdir.
2784: # Parameters:
2785: # $cmd - The command that got us here.
2786: # $tail - Tail of the command (remaining parameters).
2787: # $client - File descriptor connected to client.
2788: # Returns
2789: # 0 - Requested to exit, caller should shut down.
2790: # 1 - Continue processing.
2791: #
2792: sub fetch_user_file_handler {
2793:
2794: my ($cmd, $tail, $client) = @_;
2795:
2796: my $userinput = "$cmd:$tail";
2797: my $fname = $tail;
2798: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2799: my $udir=&propath($udom,$uname).'/userfiles';
2800: unless (-e $udir) {
2801: mkdir($udir,0770);
2802: }
2803: Debug("fetch user file for $fname");
2804: if (-e $udir) {
2805: $ufile=~s/^[\.\~]+//;
2806:
2807: # IF necessary, create the path right down to the file.
2808: # Note that any regular files in the way of this path are
2809: # wiped out to deal with some earlier folly of mine.
2810:
2811: if (!&mkpath($udir.'/'.$ufile)) {
2812: &Failure($client, "unable_to_create\n", $userinput);
2813: }
2814:
2815: my $destname=$udir.'/'.$ufile;
2816: my $transname=$udir.'/'.$ufile.'.in.transit';
2817: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2818: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2819: my $clienthost = &Apache::lonnet::hostname($clientname);
2820: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2821: my $response;
2822: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2823: my $request=new HTTP::Request('GET',"$remoteurl");
2824: my $verifycert = 1;
2825: my @machine_ids = &Apache::lonnet::current_machine_ids();
2826: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
2827: $verifycert = 0;
2828: }
2829: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
2830: if ($response->is_error()) {
2831: unlink($transname);
2832: my $message=$response->status_line;
2833: &logthis("LWP GET: $message for $fname ($remoteurl)");
2834: &Failure($client, "failed\n", $userinput);
2835: } else {
2836: Debug("Renaming $transname to $destname");
2837: if (!rename($transname,$destname)) {
2838: &logthis("Unable to move $transname to $destname");
2839: unlink($transname);
2840: &Failure($client, "failed\n", $userinput);
2841: } else {
2842: if ($fname =~ /^default.+\.(page|sequence)$/) {
2843: my ($major,$minor) = split(/\./,$clientversion);
2844: if (($major < 2) || ($major == 2 && $minor < 11)) {
2845: my $now = time;
2846: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2847: my $key = &escape('internal.contentchange');
2848: my $what = "$key=$now";
2849: my $hashref = &tie_user_hash($udom,$uname,'environment',
2850: &GDBM_WRCREAT(),"P",$what);
2851: if ($hashref) {
2852: $hashref->{$key}=$now;
2853: if (!&untie_user_hash($hashref)) {
2854: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2855: "when updating internal.contentchange");
2856: }
2857: }
2858: }
2859: }
2860: &Reply($client, "ok\n", $userinput);
2861: }
2862: }
2863: } else {
2864: &Failure($client, "not_home\n", $userinput);
2865: }
2866: return 1;
2867: }
2868: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2869:
2870: #
2871: # Remove a file from a user's home directory userfiles subdirectory.
2872: # Parameters:
2873: # cmd - the Lond request keyword that got us here.
2874: # tail - the part of the command past the keyword.
2875: # client- File descriptor connected with the client.
2876: #
2877: # Returns:
2878: # 1 - Continue processing.
2879: sub remove_user_file_handler {
2880: my ($cmd, $tail, $client) = @_;
2881:
2882: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2883:
2884: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2885: if ($ufile =~m|/\.\./|) {
2886: # any files paths with /../ in them refuse
2887: # to deal with
2888: &Failure($client, "refused\n", "$cmd:$tail");
2889: } else {
2890: my $udir = &propath($udom,$uname);
2891: if (-e $udir) {
2892: my $file=$udir.'/userfiles/'.$ufile;
2893: if (-e $file) {
2894: #
2895: # If the file is a regular file unlink is fine...
2896: # However it's possible the client wants a dir
2897: # removed, in which case rmdir is more appropriate.
2898: # Note: rmdir will only remove an empty directory.
2899: #
2900: if (-f $file){
2901: unlink($file);
2902: # for html files remove the associated .bak file
2903: # which may have been created by the editor.
2904: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
2905: my $path = $1;
2906: if (-e $file.'.bak') {
2907: unlink($file.'.bak');
2908: }
2909: }
2910: } elsif(-d $file) {
2911: rmdir($file);
2912: }
2913: if (-e $file) {
2914: # File is still there after we deleted it ?!?
2915:
2916: &Failure($client, "failed\n", "$cmd:$tail");
2917: } else {
2918: &Reply($client, "ok\n", "$cmd:$tail");
2919: }
2920: } else {
2921: &Failure($client, "not_found\n", "$cmd:$tail");
2922: }
2923: } else {
2924: &Failure($client, "not_home\n", "$cmd:$tail");
2925: }
2926: }
2927: return 1;
2928: }
2929: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2930:
2931: #
2932: # make a directory in a user's home directory userfiles subdirectory.
2933: # Parameters:
2934: # cmd - the Lond request keyword that got us here.
2935: # tail - the part of the command past the keyword.
2936: # client- File descriptor connected with the client.
2937: #
2938: # Returns:
2939: # 1 - Continue processing.
2940: sub mkdir_user_file_handler {
2941: my ($cmd, $tail, $client) = @_;
2942:
2943: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2944: $dir=&unescape($dir);
2945: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2946: if ($ufile =~m|/\.\./|) {
2947: # any files paths with /../ in them refuse
2948: # to deal with
2949: &Failure($client, "refused\n", "$cmd:$tail");
2950: } else {
2951: my $udir = &propath($udom,$uname);
2952: if (-e $udir) {
2953: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2954: if (!&mkpath($newdir)) {
2955: &Failure($client, "failed\n", "$cmd:$tail");
2956: }
2957: &Reply($client, "ok\n", "$cmd:$tail");
2958: } else {
2959: &Failure($client, "not_home\n", "$cmd:$tail");
2960: }
2961: }
2962: return 1;
2963: }
2964: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2965:
2966: #
2967: # rename a file in a user's home directory userfiles subdirectory.
2968: # Parameters:
2969: # cmd - the Lond request keyword that got us here.
2970: # tail - the part of the command past the keyword.
2971: # client- File descriptor connected with the client.
2972: #
2973: # Returns:
2974: # 1 - Continue processing.
2975: sub rename_user_file_handler {
2976: my ($cmd, $tail, $client) = @_;
2977:
2978: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2979: $old=&unescape($old);
2980: $new=&unescape($new);
2981: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2982: # any files paths with /../ in them refuse to deal with
2983: &Failure($client, "refused\n", "$cmd:$tail");
2984: } else {
2985: my $udir = &propath($udom,$uname);
2986: if (-e $udir) {
2987: my $oldfile=$udir.'/userfiles/'.$old;
2988: my $newfile=$udir.'/userfiles/'.$new;
2989: if (-e $newfile) {
2990: &Failure($client, "exists\n", "$cmd:$tail");
2991: } elsif (! -e $oldfile) {
2992: &Failure($client, "not_found\n", "$cmd:$tail");
2993: } else {
2994: if (!rename($oldfile,$newfile)) {
2995: &Failure($client, "failed\n", "$cmd:$tail");
2996: } else {
2997: &Reply($client, "ok\n", "$cmd:$tail");
2998: }
2999: }
3000: } else {
3001: &Failure($client, "not_home\n", "$cmd:$tail");
3002: }
3003: }
3004: return 1;
3005: }
3006: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
3007:
3008: #
3009: # Checks if the specified user has an active session on the server
3010: # return ok if so, not_found if not
3011: #
3012: # Parameters:
3013: # cmd - The request keyword that dispatched to tus.
3014: # tail - The tail of the request (colon separated parameters).
3015: # client - Filehandle open on the client.
3016: # Return:
3017: # 1.
3018: sub user_has_session_handler {
3019: my ($cmd, $tail, $client) = @_;
3020:
3021: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
3022:
3023: opendir(DIR,$perlvar{'lonIDsDir'});
3024: my $filename;
3025: while ($filename=readdir(DIR)) {
3026: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
3027: }
3028: if ($filename) {
3029: &Reply($client, "ok\n", "$cmd:$tail");
3030: } else {
3031: &Failure($client, "not_found\n", "$cmd:$tail");
3032: }
3033: return 1;
3034:
3035: }
3036: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
3037:
3038: sub del_usersession_handler {
3039: my ($cmd, $tail, $client) = @_;
3040:
3041: my $result;
3042: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
3043: if (($udom =~ /^$LONCAPA::match_domain$/) && ($uname =~ /^$LONCAPA::match_username$/)) {
3044: my $lonidsdir = $perlvar{'lonIDsDir'};
3045: if (-d $lonidsdir) {
3046: if (opendir(DIR,$lonidsdir)) {
3047: my $filename;
3048: while ($filename=readdir(DIR)) {
3049: if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/) {
3050: if (tie(my %oldenv,'GDBM_File',"$lonidsdir/$filename",
3051: &GDBM_READER(),0640)) {
3052: my $linkedfile;
3053: if (exists($oldenv{'user.linkedenv'})) {
3054: $linkedfile = $oldenv{'user.linkedenv'};
3055: }
3056: untie(%oldenv);
3057: $result = unlink("$lonidsdir/$filename");
3058: if ($result) {
3059: if ($linkedfile =~ /^[a-f0-9]+_linked$/) {
3060: if (-l "$lonidsdir/$linkedfile.id") {
3061: unlink("$lonidsdir/$linkedfile.id");
3062: }
3063: }
3064: }
3065: } else {
3066: $result = unlink("$lonidsdir/$filename");
3067: }
3068: last;
3069: }
3070: }
3071: }
3072: }
3073: if ($result == 1) {
3074: &Reply($client, "$result\n", "$cmd:$tail");
3075: } else {
3076: &Reply($client, "not_found\n", "$cmd:$tail");
3077: }
3078: } else {
3079: &Failure($client, "invalid_user\n", "$cmd:$tail");
3080: }
3081: return 1;
3082: }
3083:
3084: ®ister_handler("delusersession", \&del_usersession_handler, 0,1,0);
3085:
3086: #
3087: # Authenticate access to a user file by checking that the token the user's
3088: # passed also exists in their session file
3089: #
3090: # Parameters:
3091: # cmd - The request keyword that dispatched to tus.
3092: # tail - The tail of the request (colon separated parameters).
3093: # client - Filehandle open on the client.
3094: # Return:
3095: # 1.
3096: sub token_auth_user_file_handler {
3097: my ($cmd, $tail, $client) = @_;
3098:
3099: my ($fname, $session) = split(/:/, $tail);
3100:
3101: chomp($session);
3102: my $reply="non_auth";
3103: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
3104: if (open(ENVIN,"$file")) {
3105: flock(ENVIN,LOCK_SH);
3106: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
3107: if (exists($disk_env{"userfile.$fname"})) {
3108: $reply="ok";
3109: } else {
3110: foreach my $envname (keys(%disk_env)) {
3111: if ($envname=~ m|^userfile\.\Q$fname\E|) {
3112: $reply="ok";
3113: last;
3114: }
3115: }
3116: }
3117: untie(%disk_env);
3118: close(ENVIN);
3119: &Reply($client, \$reply, "$cmd:$tail");
3120: } else {
3121: &Failure($client, "invalid_token\n", "$cmd:$tail");
3122: }
3123: return 1;
3124:
3125: }
3126: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
3127:
3128: #
3129: # Unsubscribe from a resource.
3130: #
3131: # Parameters:
3132: # $cmd - The command that got us here.
3133: # $tail - Tail of the command (remaining parameters).
3134: # $client - File descriptor connected to client.
3135: # Returns
3136: # 0 - Requested to exit, caller should shut down.
3137: # 1 - Continue processing.
3138: #
3139: sub unsubscribe_handler {
3140: my ($cmd, $tail, $client) = @_;
3141:
3142: my $userinput= "$cmd:$tail";
3143:
3144: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
3145:
3146: &Debug("Unsubscribing $fname");
3147: if (-e $fname) {
3148: &Debug("Exists");
3149: &Reply($client, &unsub($fname,$clientip), $userinput);
3150: } else {
3151: &Failure($client, "not_found\n", $userinput);
3152: }
3153: return 1;
3154: }
3155: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
3156:
3157: # Subscribe to a resource
3158: #
3159: # Parameters:
3160: # $cmd - The command that got us here.
3161: # $tail - Tail of the command (remaining parameters).
3162: # $client - File descriptor connected to client.
3163: # Returns
3164: # 0 - Requested to exit, caller should shut down.
3165: # 1 - Continue processing.
3166: #
3167: sub subscribe_handler {
3168: my ($cmd, $tail, $client)= @_;
3169:
3170: my $userinput = "$cmd:$tail";
3171:
3172: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
3173:
3174: return 1;
3175: }
3176: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
3177:
3178: #
3179: # Determine the latest version of a resource (it looks for the highest
3180: # past version and then returns that +1)
3181: #
3182: # Parameters:
3183: # $cmd - The command that got us here.
3184: # $tail - Tail of the command (remaining parameters).
3185: # (Should consist of an absolute path to a file)
3186: # $client - File descriptor connected to client.
3187: # Returns
3188: # 0 - Requested to exit, caller should shut down.
3189: # 1 - Continue processing.
3190: #
3191: sub current_version_handler {
3192: my ($cmd, $tail, $client) = @_;
3193:
3194: my $userinput= "$cmd:$tail";
3195:
3196: my $fname = $tail;
3197: &Reply( $client, ¤tversion($fname)."\n", $userinput);
3198: return 1;
3199:
3200: }
3201: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
3202:
3203: # Make an entry in a user's activity log.
3204: #
3205: # Parameters:
3206: # $cmd - The command that got us here.
3207: # $tail - Tail of the command (remaining parameters).
3208: # $client - File descriptor connected to client.
3209: # Returns
3210: # 0 - Requested to exit, caller should shut down.
3211: # 1 - Continue processing.
3212: #
3213: sub activity_log_handler {
3214: my ($cmd, $tail, $client) = @_;
3215:
3216:
3217: my $userinput= "$cmd:$tail";
3218:
3219: my ($udom,$uname,$what)=split(/:/,$tail);
3220: chomp($what);
3221: my $proname=&propath($udom,$uname);
3222: my $now=time;
3223: my $hfh;
3224: if ($hfh=IO::File->new(">>$proname/activity.log")) {
3225: print $hfh "$now:$clientname:$what\n";
3226: &Reply( $client, "ok\n", $userinput);
3227: } else {
3228: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
3229: ."while attempting log\n",
3230: $userinput);
3231: }
3232:
3233: return 1;
3234: }
3235: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
3236:
3237: #
3238: # Put a namespace entry in a user profile hash.
3239: # My druthers would be for this to be an encrypted interaction too.
3240: # anything that might be an inadvertent covert channel about either
3241: # user authentication or user personal information....
3242: #
3243: # Parameters:
3244: # $cmd - The command that got us here.
3245: # $tail - Tail of the command (remaining parameters).
3246: # $client - File descriptor connected to client.
3247: # Returns
3248: # 0 - Requested to exit, caller should shut down.
3249: # 1 - Continue processing.
3250: #
3251: sub put_user_profile_entry {
3252: my ($cmd, $tail, $client) = @_;
3253:
3254: my $userinput = "$cmd:$tail";
3255:
3256: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3257: if ($namespace ne 'roles') {
3258: chomp($what);
3259: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3260: &GDBM_WRCREAT(),"P",$what);
3261: if($hashref) {
3262: my @pairs=split(/\&/,$what);
3263: foreach my $pair (@pairs) {
3264: my ($key,$value)=split(/=/,$pair);
3265: $hashref->{$key}=$value;
3266: }
3267: if (&untie_user_hash($hashref)) {
3268: &Reply( $client, "ok\n", $userinput);
3269: } else {
3270: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3271: "while attempting put\n",
3272: $userinput);
3273: }
3274: } else {
3275: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3276: "while attempting put\n", $userinput);
3277: }
3278: } else {
3279: &Failure( $client, "refused\n", $userinput);
3280: }
3281:
3282: return 1;
3283: }
3284: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
3285:
3286: # Put a piece of new data in hash, returns error if entry already exists
3287: # Parameters:
3288: # $cmd - The command that got us here.
3289: # $tail - Tail of the command (remaining parameters).
3290: # $client - File descriptor connected to client.
3291: # Returns
3292: # 0 - Requested to exit, caller should shut down.
3293: # 1 - Continue processing.
3294: #
3295: sub newput_user_profile_entry {
3296: my ($cmd, $tail, $client) = @_;
3297:
3298: my $userinput = "$cmd:$tail";
3299:
3300: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3301: if ($namespace eq 'roles') {
3302: &Failure( $client, "refused\n", $userinput);
3303: return 1;
3304: }
3305:
3306: chomp($what);
3307:
3308: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3309: &GDBM_WRCREAT(),"N",$what);
3310: if(!$hashref) {
3311: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3312: "while attempting put\n", $userinput);
3313: return 1;
3314: }
3315:
3316: my @pairs=split(/\&/,$what);
3317: foreach my $pair (@pairs) {
3318: my ($key,$value)=split(/=/,$pair);
3319: if (exists($hashref->{$key})) {
3320: if (!&untie_user_hash($hashref)) {
3321: &logthis("error: ".($!+0)." untie (GDBM) failed ".
3322: "while attempting newput - early out as key exists");
3323: }
3324: &Failure($client, "key_exists: ".$key."\n",$userinput);
3325: return 1;
3326: }
3327: }
3328:
3329: foreach my $pair (@pairs) {
3330: my ($key,$value)=split(/=/,$pair);
3331: $hashref->{$key}=$value;
3332: }
3333:
3334: if (&untie_user_hash($hashref)) {
3335: &Reply( $client, "ok\n", $userinput);
3336: } else {
3337: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3338: "while attempting put\n",
3339: $userinput);
3340: }
3341: return 1;
3342: }
3343: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
3344:
3345: #
3346: # Increment a profile entry in the user history file.
3347: # The history contains keyword value pairs. In this case,
3348: # The value itself is a pair of numbers. The first, the current value
3349: # the second an increment that this function applies to the current
3350: # value.
3351: #
3352: # Parameters:
3353: # $cmd - The command that got us here.
3354: # $tail - Tail of the command (remaining parameters).
3355: # $client - File descriptor connected to client.
3356: # Returns
3357: # 0 - Requested to exit, caller should shut down.
3358: # 1 - Continue processing.
3359: #
3360: sub increment_user_value_handler {
3361: my ($cmd, $tail, $client) = @_;
3362:
3363: my $userinput = "$cmd:$tail";
3364:
3365: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
3366: if ($namespace ne 'roles') {
3367: chomp($what);
3368: my $hashref = &tie_user_hash($udom, $uname,
3369: $namespace, &GDBM_WRCREAT(),
3370: "P",$what);
3371: if ($hashref) {
3372: my @pairs=split(/\&/,$what);
3373: foreach my $pair (@pairs) {
3374: my ($key,$value)=split(/=/,$pair);
3375: $value = &unescape($value);
3376: # We could check that we have a number...
3377: if (! defined($value) || $value eq '') {
3378: $value = 1;
3379: }
3380: $hashref->{$key}+=$value;
3381: if ($namespace eq 'nohist_resourcetracker') {
3382: if ($hashref->{$key} < 0) {
3383: $hashref->{$key} = 0;
3384: }
3385: }
3386: }
3387: if (&untie_user_hash($hashref)) {
3388: &Reply( $client, "ok\n", $userinput);
3389: } else {
3390: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3391: "while attempting inc\n", $userinput);
3392: }
3393: } else {
3394: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3395: "while attempting inc\n", $userinput);
3396: }
3397: } else {
3398: &Failure($client, "refused\n", $userinput);
3399: }
3400:
3401: return 1;
3402: }
3403: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
3404:
3405: #
3406: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
3407: # Each 'role' a user has implies a set of permissions. Adding a new role
3408: # for a person grants the permissions packaged with that role
3409: # to that user when the role is selected.
3410: #
3411: # Parameters:
3412: # $cmd - The command string (rolesput).
3413: # $tail - The remainder of the request line. For rolesput this
3414: # consists of a colon separated list that contains:
3415: # The domain and user that is granting the role (logged).
3416: # The domain and user that is getting the role.
3417: # The roles being granted as a set of & separated pairs.
3418: # each pair a key value pair.
3419: # $client - File descriptor connected to the client.
3420: # Returns:
3421: # 0 - If the daemon should exit
3422: # 1 - To continue processing.
3423: #
3424: #
3425: sub roles_put_handler {
3426: my ($cmd, $tail, $client) = @_;
3427:
3428: my $userinput = "$cmd:$tail";
3429:
3430: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
3431:
3432:
3433: my $namespace='roles';
3434: chomp($what);
3435: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3436: &GDBM_WRCREAT(), "P",
3437: "$exedom:$exeuser:$what");
3438: #
3439: # Log the attempt to set a role. The {}'s here ensure that the file
3440: # handle is open for the minimal amount of time. Since the flush
3441: # is done on close this improves the chances the log will be an un-
3442: # corrupted ordered thing.
3443: if ($hashref) {
3444: my $pass_entry = &get_auth_type($udom, $uname);
3445: my ($auth_type,$pwd) = split(/:/, $pass_entry);
3446: $auth_type = $auth_type.":";
3447: my @pairs=split(/\&/,$what);
3448: foreach my $pair (@pairs) {
3449: my ($key,$value)=split(/=/,$pair);
3450: &manage_permissions($key, $udom, $uname,
3451: $auth_type);
3452: $hashref->{$key}=$value;
3453: }
3454: if (&untie_user_hash($hashref)) {
3455: &Reply($client, "ok\n", $userinput);
3456: } else {
3457: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3458: "while attempting rolesput\n", $userinput);
3459: }
3460: } else {
3461: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3462: "while attempting rolesput\n", $userinput);
3463: }
3464: return 1;
3465: }
3466: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
3467:
3468: #
3469: # Deletes (removes) a role for a user. This is equivalent to removing
3470: # a permissions package associated with the role from the user's profile.
3471: #
3472: # Parameters:
3473: # $cmd - The command (rolesdel)
3474: # $tail - The remainder of the request line. This consists
3475: # of:
3476: # The domain and user requesting the change (logged)
3477: # The domain and user being changed.
3478: # The roles being revoked. These are shipped to us
3479: # as a bunch of & separated role name keywords.
3480: # $client - The file handle open on the client.
3481: # Returns:
3482: # 1 - Continue processing
3483: # 0 - Exit.
3484: #
3485: sub roles_delete_handler {
3486: my ($cmd, $tail, $client) = @_;
3487:
3488: my $userinput = "$cmd:$tail";
3489:
3490: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
3491: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
3492: "what = ".$what);
3493: my $namespace='roles';
3494: chomp($what);
3495: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3496: &GDBM_WRCREAT(), "D",
3497: "$exedom:$exeuser:$what");
3498:
3499: if ($hashref) {
3500: my @rolekeys=split(/\&/,$what);
3501:
3502: foreach my $key (@rolekeys) {
3503: delete $hashref->{$key};
3504: }
3505: if (&untie_user_hash($hashref)) {
3506: &Reply($client, "ok\n", $userinput);
3507: } else {
3508: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3509: "while attempting rolesdel\n", $userinput);
3510: }
3511: } else {
3512: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3513: "while attempting rolesdel\n", $userinput);
3514: }
3515:
3516: return 1;
3517: }
3518: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
3519:
3520: # Unencrypted get from a user's profile database. See
3521: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
3522: # This function retrieves a keyed item from a specific named database in the
3523: # user's directory.
3524: #
3525: # Parameters:
3526: # $cmd - Command request keyword (get).
3527: # $tail - Tail of the command. This is a colon separated list
3528: # consisting of the domain and username that uniquely
3529: # identifies the profile,
3530: # The 'namespace' which selects the gdbm file to
3531: # do the lookup in,
3532: # & separated list of keys to lookup. Note that
3533: # the values are returned as an & separated list too.
3534: # $client - File descriptor open on the client.
3535: # Returns:
3536: # 1 - Continue processing.
3537: # 0 - Exit.
3538: #
3539: sub get_profile_entry {
3540: my ($cmd, $tail, $client) = @_;
3541:
3542: my $userinput= "$cmd:$tail";
3543:
3544: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3545: chomp($what);
3546:
3547:
3548: my $replystring = read_profile($udom, $uname, $namespace, $what);
3549: my ($first) = split(/:/,$replystring);
3550: if($first ne "error") {
3551: &Reply($client, \$replystring, $userinput);
3552: } else {
3553: &Failure($client, $replystring." while attempting get\n", $userinput);
3554: }
3555: return 1;
3556:
3557:
3558: }
3559: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3560:
3561: #
3562: # Process the encrypted get request. Note that the request is sent
3563: # in clear, but the reply is encrypted. This is a small covert channel:
3564: # information about the sensitive keys is given to the snooper. Just not
3565: # information about the values of the sensitive key. Hmm if I wanted to
3566: # know these I'd snoop for the egets. Get the profile item names from them
3567: # and then issue a get for them since there's no enforcement of the
3568: # requirement of an encrypted get for particular profile items. If I
3569: # were re-doing this, I'd force the request to be encrypted as well as the
3570: # reply. I'd also just enforce encrypted transactions for all gets since
3571: # that would prevent any covert channel snooping.
3572: #
3573: # Parameters:
3574: # $cmd - Command keyword of request (eget).
3575: # $tail - Tail of the command. See GetProfileEntry
3576: # for more information about this.
3577: # $client - File open on the client.
3578: # Returns:
3579: # 1 - Continue processing
3580: # 0 - server should exit.
3581: sub get_profile_entry_encrypted {
3582: my ($cmd, $tail, $client) = @_;
3583:
3584: my $userinput = "$cmd:$tail";
3585:
3586: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3587: chomp($what);
3588: my $qresult = read_profile($udom, $uname, $namespace, $what);
3589: my ($first) = split(/:/, $qresult);
3590: if($first ne "error") {
3591:
3592: if ($cipher) {
3593: my $cmdlength=length($qresult);
3594: $qresult.=" ";
3595: my $encqresult='';
3596: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3597: $encqresult.= unpack("H16",
3598: $cipher->encrypt(substr($qresult,
3599: $encidx,
3600: 8)));
3601: }
3602: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3603: } else {
3604: &Failure( $client, "error:no_key\n", $userinput);
3605: }
3606: } else {
3607: &Failure($client, "$qresult while attempting eget\n", $userinput);
3608:
3609: }
3610:
3611: return 1;
3612: }
3613: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3614:
3615: #
3616: # Deletes a key in a user profile database.
3617: #
3618: # Parameters:
3619: # $cmd - Command keyword (del).
3620: # $tail - Command tail. IN this case a colon
3621: # separated list containing:
3622: # The domain and user that identifies uniquely
3623: # the identity of the user.
3624: # The profile namespace (name of the profile
3625: # database file).
3626: # & separated list of keywords to delete.
3627: # $client - File open on client socket.
3628: # Returns:
3629: # 1 - Continue processing
3630: # 0 - Exit server.
3631: #
3632: #
3633: sub delete_profile_entry {
3634: my ($cmd, $tail, $client) = @_;
3635:
3636: my $userinput = "cmd:$tail";
3637:
3638: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3639: chomp($what);
3640: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3641: &GDBM_WRCREAT(),
3642: "D",$what);
3643: if ($hashref) {
3644: my @keys=split(/\&/,$what);
3645: foreach my $key (@keys) {
3646: delete($hashref->{$key});
3647: }
3648: if (&untie_user_hash($hashref)) {
3649: &Reply($client, "ok\n", $userinput);
3650: } else {
3651: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3652: "while attempting del\n", $userinput);
3653: }
3654: } else {
3655: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3656: "while attempting del\n", $userinput);
3657: }
3658: return 1;
3659: }
3660: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3661:
3662: #
3663: # List the set of keys that are defined in a profile database file.
3664: # A successful reply from this will contain an & separated list of
3665: # the keys.
3666: # Parameters:
3667: # $cmd - Command request (keys).
3668: # $tail - Remainder of the request, a colon separated
3669: # list containing domain/user that identifies the
3670: # user being queried, and the database namespace
3671: # (database filename essentially).
3672: # $client - File open on the client.
3673: # Returns:
3674: # 1 - Continue processing.
3675: # 0 - Exit the server.
3676: #
3677: sub get_profile_keys {
3678: my ($cmd, $tail, $client) = @_;
3679:
3680: my $userinput = "$cmd:$tail";
3681:
3682: my ($udom,$uname,$namespace)=split(/:/,$tail);
3683: my $qresult='';
3684: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3685: &GDBM_READER());
3686: if ($hashref) {
3687: foreach my $key (keys %$hashref) {
3688: $qresult.="$key&";
3689: }
3690: if (&untie_user_hash($hashref)) {
3691: $qresult=~s/\&$//;
3692: &Reply($client, \$qresult, $userinput);
3693: } else {
3694: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3695: "while attempting keys\n", $userinput);
3696: }
3697: } else {
3698: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3699: "while attempting keys\n", $userinput);
3700: }
3701:
3702: return 1;
3703: }
3704: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3705:
3706: #
3707: # Dump the contents of a user profile database.
3708: # Note that this constitutes a very large covert channel too since
3709: # the dump will return sensitive information that is not encrypted.
3710: # The naive security assumption is that the session negotiation ensures
3711: # our client is trusted and I don't believe that's assured at present.
3712: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3713: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3714: #
3715: # Parameters:
3716: # $cmd - The command request keyword (currentdump).
3717: # $tail - Remainder of the request, consisting of a colon
3718: # separated list that has the domain/username and
3719: # the namespace to dump (database file).
3720: # $client - file open on the remote client.
3721: # Returns:
3722: # 1 - Continue processing.
3723: # 0 - Exit the server.
3724: #
3725: sub dump_profile_database {
3726: my ($cmd, $tail, $client) = @_;
3727:
3728: my $res = LONCAPA::Lond::dump_profile_database($tail);
3729:
3730: if ($res =~ /^error:/) {
3731: Failure($client, \$res, "$cmd:$tail");
3732: } else {
3733: Reply($client, \$res, "$cmd:$tail");
3734: }
3735:
3736: return 1;
3737:
3738: #TODO remove
3739: my $userinput = "$cmd:$tail";
3740:
3741: my ($udom,$uname,$namespace) = split(/:/,$tail);
3742: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3743: &GDBM_READER());
3744: if ($hashref) {
3745: # Structure of %data:
3746: # $data{$symb}->{$parameter}=$value;
3747: # $data{$symb}->{'v.'.$parameter}=$version;
3748: # since $parameter will be unescaped, we do not
3749: # have to worry about silly parameter names...
3750:
3751: my $qresult='';
3752: my %data = (); # A hash of anonymous hashes..
3753: while (my ($key,$value) = each(%$hashref)) {
3754: my ($v,$symb,$param) = split(/:/,$key);
3755: next if ($v eq 'version' || $symb eq 'keys');
3756: next if (exists($data{$symb}) &&
3757: exists($data{$symb}->{$param}) &&
3758: $data{$symb}->{'v.'.$param} > $v);
3759: $data{$symb}->{$param}=$value;
3760: $data{$symb}->{'v.'.$param}=$v;
3761: }
3762: if (&untie_user_hash($hashref)) {
3763: while (my ($symb,$param_hash) = each(%data)) {
3764: while(my ($param,$value) = each (%$param_hash)){
3765: next if ($param =~ /^v\./); # Ignore versions...
3766: #
3767: # Just dump the symb=value pairs separated by &
3768: #
3769: $qresult.=$symb.':'.$param.'='.$value.'&';
3770: }
3771: }
3772: chop($qresult);
3773: &Reply($client , \$qresult, $userinput);
3774: } else {
3775: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3776: "while attempting currentdump\n", $userinput);
3777: }
3778: } else {
3779: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3780: "while attempting currentdump\n", $userinput);
3781: }
3782:
3783: return 1;
3784: }
3785: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3786:
3787: #
3788: # Dump a profile database with an optional regular expression
3789: # to match against the keys. In this dump, no effort is made
3790: # to separate symb from version information. Presumably the
3791: # databases that are dumped by this command are of a different
3792: # structure. Need to look at this and improve the documentation of
3793: # both this and the currentdump handler.
3794: # Parameters:
3795: # $cmd - The command keyword.
3796: # $tail - All of the characters after the $cmd:
3797: # These are expected to be a colon
3798: # separated list containing:
3799: # domain/user - identifying the user.
3800: # namespace - identifying the database.
3801: # regexp - optional regular expression
3802: # that is matched against
3803: # database keywords to do
3804: # selective dumps.
3805: # range - optional range of entries
3806: # e.g., 10-20 would return the
3807: # 10th to 19th items, etc.
3808: # $client - Channel open on the client.
3809: # Returns:
3810: # 1 - Continue processing.
3811: # Side effects:
3812: # response is written to $client.
3813: #
3814: sub dump_with_regexp {
3815: my ($cmd, $tail, $client) = @_;
3816:
3817: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3818:
3819: if ($res =~ /^error:/) {
3820: Failure($client, \$res, "$cmd:$tail");
3821: } else {
3822: Reply($client, \$res, "$cmd:$tail");
3823: }
3824:
3825: return 1;
3826: }
3827: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3828:
3829: # Store a set of key=value pairs associated with a versioned name.
3830: #
3831: # Parameters:
3832: # $cmd - Request command keyword.
3833: # $tail - Tail of the request. This is a colon
3834: # separated list containing:
3835: # domain/user - User and authentication domain.
3836: # namespace - Name of the database being modified
3837: # rid - Resource keyword to modify.
3838: # what - new value associated with rid.
3839: # laststore - (optional) version=timestamp
3840: # for most recent transaction for rid
3841: # in namespace, when cstore was called
3842: #
3843: # $client - Socket open on the client.
3844: #
3845: #
3846: # Returns:
3847: # 1 (keep on processing).
3848: # Side-Effects:
3849: # Writes to the client
3850: # Successful storage will cause either 'ok', or, if $laststore was included
3851: # in the tail of the request, and the version number for the last transaction
3852: # is larger than the version in $laststore, delay:$numtrans , where $numtrans
3853: # is the number of store evevnts recorded for rid in namespace since
3854: # lonnet::store() was called by the client.
3855: #
3856: sub store_handler {
3857: my ($cmd, $tail, $client) = @_;
3858:
3859: my $userinput = "$cmd:$tail";
3860: chomp($tail);
3861: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
3862: if ($namespace ne 'roles') {
3863:
3864: my @pairs=split(/\&/,$what);
3865: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3866: &GDBM_WRCREAT(), "S",
3867: "$rid:$what");
3868: if ($hashref) {
3869: my $now = time;
3870: my $numtrans;
3871: if ($laststore) {
3872: my ($previousversion,$previoustime) = split(/\=/,$laststore);
3873: my ($lastversion,$lasttime) = (0,0);
3874: $lastversion = $hashref->{"version:$rid"};
3875: if ($lastversion) {
3876: $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
3877: }
3878: if (($previousversion) && ($previousversion !~ /\D/)) {
3879: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
3880: $numtrans = $lastversion - $previousversion;
3881: }
3882: } elsif ($lastversion) {
3883: $numtrans = $lastversion;
3884: }
3885: if ($numtrans) {
3886: $numtrans =~ s/D//g;
3887: }
3888: }
3889: $hashref->{"version:$rid"}++;
3890: my $version=$hashref->{"version:$rid"};
3891: my $allkeys='';
3892: foreach my $pair (@pairs) {
3893: my ($key,$value)=split(/=/,$pair);
3894: $allkeys.=$key.':';
3895: $hashref->{"$version:$rid:$key"}=$value;
3896: }
3897: $hashref->{"$version:$rid:timestamp"}=$now;
3898: $allkeys.='timestamp';
3899: $hashref->{"$version:keys:$rid"}=$allkeys;
3900: if (&untie_user_hash($hashref)) {
3901: my $msg = 'ok';
3902: if ($numtrans) {
3903: $msg = 'delay:'.$numtrans;
3904: }
3905: &Reply($client, "$msg\n", $userinput);
3906: } else {
3907: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3908: "while attempting store\n", $userinput);
3909: }
3910: } else {
3911: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3912: "while attempting store\n", $userinput);
3913: }
3914: } else {
3915: &Failure($client, "refused\n", $userinput);
3916: }
3917:
3918: return 1;
3919: }
3920: ®ister_handler("store", \&store_handler, 0, 1, 0);
3921:
3922: # Modify a set of key=value pairs associated with a versioned name.
3923: #
3924: # Parameters:
3925: # $cmd - Request command keyword.
3926: # $tail - Tail of the request. This is a colon
3927: # separated list containing:
3928: # domain/user - User and authentication domain.
3929: # namespace - Name of the database being modified
3930: # rid - Resource keyword to modify.
3931: # v - Version item to modify
3932: # what - new value associated with rid.
3933: #
3934: # $client - Socket open on the client.
3935: #
3936: #
3937: # Returns:
3938: # 1 (keep on processing).
3939: # Side-Effects:
3940: # Writes to the client
3941: sub putstore_handler {
3942: my ($cmd, $tail, $client) = @_;
3943:
3944: my $userinput = "$cmd:$tail";
3945:
3946: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3947: if ($namespace ne 'roles') {
3948:
3949: chomp($what);
3950: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3951: &GDBM_WRCREAT(), "M",
3952: "$rid:$v:$what");
3953: if ($hashref) {
3954: my $now = time;
3955: my %data = &hash_extract($what);
3956: my @allkeys;
3957: while (my($key,$value) = each(%data)) {
3958: push(@allkeys,$key);
3959: $hashref->{"$v:$rid:$key"} = $value;
3960: }
3961: my $allkeys = join(':',@allkeys);
3962: $hashref->{"$v:keys:$rid"}=$allkeys;
3963:
3964: if (&untie_user_hash($hashref)) {
3965: &Reply($client, "ok\n", $userinput);
3966: } else {
3967: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3968: "while attempting store\n", $userinput);
3969: }
3970: } else {
3971: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3972: "while attempting store\n", $userinput);
3973: }
3974: } else {
3975: &Failure($client, "refused\n", $userinput);
3976: }
3977:
3978: return 1;
3979: }
3980: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3981:
3982: sub hash_extract {
3983: my ($str)=@_;
3984: my %hash;
3985: foreach my $pair (split(/\&/,$str)) {
3986: my ($key,$value)=split(/=/,$pair);
3987: $hash{$key}=$value;
3988: }
3989: return (%hash);
3990: }
3991: sub hash_to_str {
3992: my ($hash_ref)=@_;
3993: my $str;
3994: foreach my $key (keys(%$hash_ref)) {
3995: $str.=$key.'='.$hash_ref->{$key}.'&';
3996: }
3997: $str=~s/\&$//;
3998: return $str;
3999: }
4000:
4001: #
4002: # Dump out all versions of a resource that has key=value pairs associated
4003: # with it for each version. These resources are built up via the store
4004: # command.
4005: #
4006: # Parameters:
4007: # $cmd - Command keyword.
4008: # $tail - Remainder of the request which consists of:
4009: # domain/user - User and auth. domain.
4010: # namespace - name of resource database.
4011: # rid - Resource id.
4012: # $client - socket open on the client.
4013: #
4014: # Returns:
4015: # 1 indicating the caller should not yet exit.
4016: # Side-effects:
4017: # Writes a reply to the client.
4018: # The reply is a string of the following shape:
4019: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
4020: # Where the 1 above represents version 1.
4021: # this continues for all pairs of keys in all versions.
4022: #
4023: #
4024: #
4025: #
4026: sub restore_handler {
4027: my ($cmd, $tail, $client) = @_;
4028:
4029: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
4030: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
4031: $namespace=~s/\//\_/g;
4032: $namespace = &LONCAPA::clean_username($namespace);
4033:
4034: chomp($rid);
4035: my $qresult='';
4036: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
4037: if ($hashref) {
4038: my $version=$hashref->{"version:$rid"};
4039: $qresult.="version=$version&";
4040: my $scope;
4041: for ($scope=1;$scope<=$version;$scope++) {
4042: my $vkeys=$hashref->{"$scope:keys:$rid"};
4043: my @keys=split(/:/,$vkeys);
4044: my $key;
4045: $qresult.="$scope:keys=$vkeys&";
4046: foreach $key (@keys) {
4047: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
4048: }
4049: }
4050: if (&untie_user_hash($hashref)) {
4051: $qresult=~s/\&$//;
4052: &Reply( $client, \$qresult, $userinput);
4053: } else {
4054: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4055: "while attempting restore\n", $userinput);
4056: }
4057: } else {
4058: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4059: "while attempting restore\n", $userinput);
4060: }
4061:
4062: return 1;
4063:
4064:
4065: }
4066: ®ister_handler("restore", \&restore_handler, 0,1,0);
4067:
4068: #
4069: # Add a chat message to a synchronous discussion board.
4070: #
4071: # Parameters:
4072: # $cmd - Request keyword.
4073: # $tail - Tail of the command. A colon separated list
4074: # containing:
4075: # cdom - Domain on which the chat board lives
4076: # cnum - Course containing the chat board.
4077: # newpost - Body of the posting.
4078: # group - Optional group, if chat board is only
4079: # accessible in a group within the course
4080: # $client - Socket open on the client.
4081: # Returns:
4082: # 1 - Indicating caller should keep on processing.
4083: #
4084: # Side-effects:
4085: # writes a reply to the client.
4086: #
4087: #
4088: sub send_chat_handler {
4089: my ($cmd, $tail, $client) = @_;
4090:
4091:
4092: my $userinput = "$cmd:$tail";
4093:
4094: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
4095: &chat_add($cdom,$cnum,$newpost,$group);
4096: &Reply($client, "ok\n", $userinput);
4097:
4098: return 1;
4099: }
4100: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
4101:
4102: #
4103: # Retrieve the set of chat messages from a discussion board.
4104: #
4105: # Parameters:
4106: # $cmd - Command keyword that initiated the request.
4107: # $tail - Remainder of the request after the command
4108: # keyword. In this case a colon separated list of
4109: # chat domain - Which discussion board.
4110: # chat id - Discussion thread(?)
4111: # domain/user - Authentication domain and username
4112: # of the requesting person.
4113: # group - Optional course group containing
4114: # the board.
4115: # $client - Socket open on the client program.
4116: # Returns:
4117: # 1 - continue processing
4118: # Side effects:
4119: # Response is written to the client.
4120: #
4121: sub retrieve_chat_handler {
4122: my ($cmd, $tail, $client) = @_;
4123:
4124:
4125: my $userinput = "$cmd:$tail";
4126:
4127: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
4128: my $reply='';
4129: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
4130: $reply.=&escape($_).':';
4131: }
4132: $reply=~s/\:$//;
4133: &Reply($client, \$reply, $userinput);
4134:
4135:
4136: return 1;
4137: }
4138: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
4139:
4140: #
4141: # Initiate a query of an sql database. SQL query repsonses get put in
4142: # a file for later retrieval. This prevents sql query results from
4143: # bottlenecking the system. Note that with loncnew, perhaps this is
4144: # less of an issue since multiple outstanding requests can be concurrently
4145: # serviced.
4146: #
4147: # Parameters:
4148: # $cmd - Command keyword that initiated the request.
4149: # $tail - Remainder of the command after the keyword.
4150: # For this function, this consists of a query and
4151: # 3 arguments that are self-documentingly labelled
4152: # in the original arg1, arg2, arg3.
4153: # $client - Socket open on the client.
4154: # Return:
4155: # 1 - Indicating processing should continue.
4156: # Side-effects:
4157: # a reply is written to $client.
4158: #
4159: sub send_query_handler {
4160: my ($cmd, $tail, $client) = @_;
4161:
4162: my $userinput = "$cmd:$tail";
4163:
4164: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
4165: $query=~s/\n*$//g;
4166: if (($query eq 'usersearch') || ($query eq 'instdirsearch')) {
4167: my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch');
4168: my $earlyout;
4169: if (ref($usersearchconf) eq 'HASH') {
4170: if ($currentdomainid eq $clienthomedom) {
4171: if ($query eq 'usersearch') {
4172: if ($usersearchconf->{'lcavailable'} eq '0') {
4173: $earlyout = 1;
4174: }
4175: } else {
4176: if ($usersearchconf->{'available'} eq '0') {
4177: $earlyout = 1;
4178: }
4179: }
4180: } else {
4181: if ($query eq 'usersearch') {
4182: if ($usersearchconf->{'lclocalonly'}) {
4183: $earlyout = 1;
4184: }
4185: } else {
4186: if ($usersearchconf->{'localonly'}) {
4187: $earlyout = 1;
4188: }
4189: }
4190: }
4191: }
4192: if ($earlyout) {
4193: &Reply($client, "query_not_authorized\n");
4194: return 1;
4195: }
4196: }
4197: &Reply($client, "". &sql_reply("$clientname\&$query".
4198: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
4199: $userinput);
4200:
4201: return 1;
4202: }
4203: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
4204:
4205: #
4206: # Add a reply to an sql query. SQL queries are done asyncrhonously.
4207: # The query is submitted via a "querysend" transaction.
4208: # There it is passed on to the lonsql daemon, queued and issued to
4209: # mysql.
4210: # This transaction is invoked when the sql transaction is complete
4211: # it stores the query results in flie and indicates query completion.
4212: # presumably local software then fetches this response... I'm guessing
4213: # the sequence is: lonc does a querysend, we ask lonsql to do it.
4214: # lonsql on completion of the query interacts with the lond of our
4215: # client to do a query reply storing two files:
4216: # - id - The results of the query.
4217: # - id.end - Indicating the transaction completed.
4218: # NOTE: id is a unique id assigned to the query and querysend time.
4219: # Parameters:
4220: # $cmd - Command keyword that initiated this request.
4221: # $tail - Remainder of the tail. In this case that's a colon
4222: # separated list containing the query Id and the
4223: # results of the query.
4224: # $client - Socket open on the client.
4225: # Return:
4226: # 1 - Indicating that we should continue processing.
4227: # Side effects:
4228: # ok written to the client.
4229: #
4230: sub reply_query_handler {
4231: my ($cmd, $tail, $client) = @_;
4232:
4233:
4234: my $userinput = "$cmd:$tail";
4235:
4236: my ($id,$reply)=split(/:/,$tail);
4237: my $store;
4238: my $execdir=$perlvar{'lonDaemons'};
4239: if ($store=IO::File->new(">$execdir/tmp/$id")) {
4240: $reply=~s/\&/\n/g;
4241: print $store $reply;
4242: close $store;
4243: my $store2=IO::File->new(">$execdir/tmp/$id.end");
4244: print $store2 "done\n";
4245: close $store2;
4246: &Reply($client, "ok\n", $userinput);
4247: } else {
4248: &Failure($client, "error: ".($!+0)
4249: ." IO::File->new Failed ".
4250: "while attempting queryreply\n", $userinput);
4251: }
4252:
4253:
4254: return 1;
4255: }
4256: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
4257:
4258: #
4259: # Process the courseidput request. Not quite sure what this means
4260: # at the system level sense. It appears a gdbm file in the
4261: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
4262: # a set of entries made in that database.
4263: #
4264: # Parameters:
4265: # $cmd - The command keyword that initiated this request.
4266: # $tail - Tail of the command. In this case consists of a colon
4267: # separated list contaning the domain to apply this to and
4268: # an ampersand separated list of keyword=value pairs.
4269: # Each value is a colon separated list that includes:
4270: # description, institutional code and course owner.
4271: # For backward compatibility with versions included
4272: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
4273: # code and/or course owner are preserved from the existing
4274: # record when writing a new record in response to 1.1 or
4275: # 1.2 implementations of lonnet::flushcourselogs().
4276: #
4277: # $client - Socket open on the client.
4278: # Returns:
4279: # 1 - indicating that processing should continue
4280: #
4281: # Side effects:
4282: # reply is written to the client.
4283: #
4284: sub put_course_id_handler {
4285: my ($cmd, $tail, $client) = @_;
4286:
4287:
4288: my $userinput = "$cmd:$tail";
4289:
4290: my ($udom, $what) = split(/:/, $tail,2);
4291: chomp($what);
4292: my $now=time;
4293: my @pairs=split(/\&/,$what);
4294:
4295: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4296: if ($hashref) {
4297: foreach my $pair (@pairs) {
4298: my ($key,$courseinfo) = split(/=/,$pair,2);
4299: $courseinfo =~ s/=/:/g;
4300: if (defined($hashref->{$key})) {
4301: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
4302: if (ref($value) eq 'HASH') {
4303: my @items = ('description','inst_code','owner','type');
4304: my @new_items = split(/:/,$courseinfo,-1);
4305: my %storehash;
4306: for (my $i=0; $i<@new_items; $i++) {
4307: $storehash{$items[$i]} = &unescape($new_items[$i]);
4308: }
4309: $hashref->{$key} =
4310: &Apache::lonnet::freeze_escape(\%storehash);
4311: my $unesc_key = &unescape($key);
4312: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4313: next;
4314: }
4315: }
4316: my @current_items = split(/:/,$hashref->{$key},-1);
4317: shift(@current_items); # remove description
4318: pop(@current_items); # remove last access
4319: my $numcurrent = scalar(@current_items);
4320: if ($numcurrent > 3) {
4321: $numcurrent = 3;
4322: }
4323: my @new_items = split(/:/,$courseinfo,-1);
4324: my $numnew = scalar(@new_items);
4325: if ($numcurrent > 0) {
4326: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
4327: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
4328: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
4329: }
4330: }
4331: }
4332: $hashref->{$key}=$courseinfo.':'.$now;
4333: }
4334: if (&untie_domain_hash($hashref)) {
4335: &Reply( $client, "ok\n", $userinput);
4336: } else {
4337: &Failure($client, "error: ".($!+0)
4338: ." untie(GDBM) Failed ".
4339: "while attempting courseidput\n", $userinput);
4340: }
4341: } else {
4342: &Failure($client, "error: ".($!+0)
4343: ." tie(GDBM) Failed ".
4344: "while attempting courseidput\n", $userinput);
4345: }
4346:
4347: return 1;
4348: }
4349: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
4350:
4351: sub put_course_id_hash_handler {
4352: my ($cmd, $tail, $client) = @_;
4353: my $userinput = "$cmd:$tail";
4354: my ($udom,$mode,$what) = split(/:/, $tail,3);
4355: chomp($what);
4356: my $now=time;
4357: my @pairs=split(/\&/,$what);
4358: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4359: if ($hashref) {
4360: foreach my $pair (@pairs) {
4361: my ($key,$value)=split(/=/,$pair);
4362: my $unesc_key = &unescape($key);
4363: if ($mode ne 'timeonly') {
4364: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
4365: my $curritems = &Apache::lonnet::thaw_unescape($key);
4366: if (ref($curritems) ne 'HASH') {
4367: my @current_items = split(/:/,$hashref->{$key},-1);
4368: my $lasttime = pop(@current_items);
4369: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
4370: } else {
4371: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
4372: }
4373: }
4374: $hashref->{$key} = $value;
4375: }
4376: if ($mode ne 'notime') {
4377: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4378: }
4379: }
4380: if (&untie_domain_hash($hashref)) {
4381: &Reply($client, "ok\n", $userinput);
4382: } else {
4383: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4384: "while attempting courseidputhash\n", $userinput);
4385: }
4386: } else {
4387: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4388: "while attempting courseidputhash\n", $userinput);
4389: }
4390: return 1;
4391: }
4392: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
4393:
4394: # Retrieves the value of a course id resource keyword pattern
4395: # defined since a starting date. Both the starting date and the
4396: # keyword pattern are optional. If the starting date is not supplied it
4397: # is treated as the beginning of time. If the pattern is not found,
4398: # it is treatred as "." matching everything.
4399: #
4400: # Parameters:
4401: # $cmd - Command keyword that resulted in us being dispatched.
4402: # $tail - The remainder of the command that, in this case, consists
4403: # of a colon separated list of:
4404: # domain - The domain in which the course database is
4405: # defined.
4406: # since - Optional parameter describing the minimum
4407: # time of definition(?) of the resources that
4408: # will match the dump.
4409: # description - regular expression that is used to filter
4410: # the dump. Only keywords matching this regexp
4411: # will be used.
4412: # institutional code - optional supplied code to filter
4413: # the dump. Only courses with an institutional code
4414: # that match the supplied code will be returned.
4415: # owner - optional supplied username and domain of owner to
4416: # filter the dump. Only courses for which the course
4417: # owner matches the supplied username and/or domain
4418: # will be returned. Pre-2.2.0 legacy entries from
4419: # nohist_courseiddump will only contain usernames.
4420: # type - optional parameter for selection
4421: # regexp_ok - if 1 or -1 allow the supplied institutional code
4422: # filter to behave as a regular expression:
4423: # 1 will not exclude the course if the instcode matches the RE
4424: # -1 will exclude the course if the instcode matches the RE
4425: # rtn_as_hash - whether to return the information available for
4426: # each matched item as a frozen hash of all
4427: # key, value pairs in the item's hash, or as a
4428: # colon-separated list of (in order) description,
4429: # institutional code, and course owner.
4430: # selfenrollonly - filter by courses allowing self-enrollment
4431: # now or in the future (selfenrollonly = 1).
4432: # catfilter - filter by course category, assigned to a course
4433: # using manually defined categories (i.e., not
4434: # self-cataloging based on on institutional code).
4435: # showhidden - include course in results even if course
4436: # was set to be excluded from course catalog (DC only).
4437: # caller - if set to 'coursecatalog', courses set to be hidden
4438: # from course catalog will be excluded from results (unless
4439: # overridden by "showhidden".
4440: # cloner - escaped username:domain of course cloner (if picking course to
4441: # clone).
4442: # cc_clone_list - escaped comma separated list of courses for which
4443: # course cloner has active CC role (and so can clone
4444: # automatically).
4445: # cloneonly - filter by courses for which cloner has rights to clone.
4446: # createdbefore - include courses for which creation date preceeded this date.
4447: # createdafter - include courses for which creation date followed this date.
4448: # creationcontext - include courses created in specified context
4449: #
4450: # domcloner - flag to indicate if user can create CCs in course's domain.
4451: # If so, ability to clone course is automatic.
4452: # hasuniquecode - filter by courses for which a six character unique code has
4453: # been set.
4454: #
4455: # $client - The socket open on the client.
4456: # Returns:
4457: # 1 - Continue processing.
4458: # Side Effects:
4459: # a reply is written to $client.
4460: sub dump_course_id_handler {
4461: my ($cmd, $tail, $client) = @_;
4462:
4463: my $res = LONCAPA::Lond::dump_course_id_handler($tail);
4464: if ($res =~ /^error:/) {
4465: Failure($client, \$res, "$cmd:$tail");
4466: } else {
4467: Reply($client, \$res, "$cmd:$tail");
4468: }
4469:
4470: return 1;
4471:
4472: #TODO remove
4473: my $userinput = "$cmd:$tail";
4474:
4475: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
4476: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
4477: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
4478: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
4479: my $now = time;
4480: my ($cloneruname,$clonerudom,%cc_clone);
4481: if (defined($description)) {
4482: $description=&unescape($description);
4483: } else {
4484: $description='.';
4485: }
4486: if (defined($instcodefilter)) {
4487: $instcodefilter=&unescape($instcodefilter);
4488: } else {
4489: $instcodefilter='.';
4490: }
4491: my ($ownerunamefilter,$ownerdomfilter);
4492: if (defined($ownerfilter)) {
4493: $ownerfilter=&unescape($ownerfilter);
4494: if ($ownerfilter ne '.' && defined($ownerfilter)) {
4495: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
4496: $ownerunamefilter = $1;
4497: $ownerdomfilter = $2;
4498: } else {
4499: $ownerunamefilter = $ownerfilter;
4500: $ownerdomfilter = '';
4501: }
4502: }
4503: } else {
4504: $ownerfilter='.';
4505: }
4506:
4507: if (defined($coursefilter)) {
4508: $coursefilter=&unescape($coursefilter);
4509: } else {
4510: $coursefilter='.';
4511: }
4512: if (defined($typefilter)) {
4513: $typefilter=&unescape($typefilter);
4514: } else {
4515: $typefilter='.';
4516: }
4517: if (defined($regexp_ok)) {
4518: $regexp_ok=&unescape($regexp_ok);
4519: }
4520: if (defined($catfilter)) {
4521: $catfilter=&unescape($catfilter);
4522: }
4523: if (defined($cloner)) {
4524: $cloner = &unescape($cloner);
4525: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4526: }
4527: if (defined($cc_clone_list)) {
4528: $cc_clone_list = &unescape($cc_clone_list);
4529: my @cc_cloners = split('&',$cc_clone_list);
4530: foreach my $cid (@cc_cloners) {
4531: my ($clonedom,$clonenum) = split(':',$cid);
4532: next if ($clonedom ne $udom);
4533: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4534: }
4535: }
4536: if ($createdbefore ne '') {
4537: $createdbefore = &unescape($createdbefore);
4538: } else {
4539: $createdbefore = 0;
4540: }
4541: if ($createdafter ne '') {
4542: $createdafter = &unescape($createdafter);
4543: } else {
4544: $createdafter = 0;
4545: }
4546: if ($creationcontext ne '') {
4547: $creationcontext = &unescape($creationcontext);
4548: } else {
4549: $creationcontext = '.';
4550: }
4551: unless ($hasuniquecode) {
4552: $hasuniquecode = '.';
4553: }
4554: my $unpack = 1;
4555: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
4556: $typefilter eq '.') {
4557: $unpack = 0;
4558: }
4559: if (!defined($since)) { $since=0; }
4560: my $qresult='';
4561: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4562: if ($hashref) {
4563: while (my ($key,$value) = each(%$hashref)) {
4564: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
4565: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4566: $context);
4567: $unesc_key = &unescape($key);
4568: if ($unesc_key =~ /^lasttime:/) {
4569: next;
4570: } else {
4571: $lasttime_key = &escape('lasttime:'.$unesc_key);
4572: }
4573: if ($hashref->{$lasttime_key} ne '') {
4574: $lasttime = $hashref->{$lasttime_key};
4575: next if ($lasttime<$since);
4576: }
4577: my ($canclone,$valchange);
4578: my $items = &Apache::lonnet::thaw_unescape($value);
4579: if (ref($items) eq 'HASH') {
4580: if ($hashref->{$lasttime_key} eq '') {
4581: next if ($since > 1);
4582: }
4583: $is_hash = 1;
4584: if ($domcloner) {
4585: $canclone = 1;
4586: } elsif (defined($clonerudom)) {
4587: if ($items->{'cloners'}) {
4588: my @cloneable = split(',',$items->{'cloners'});
4589: if (@cloneable) {
4590: if (grep(/^\*$/,@cloneable)) {
4591: $canclone = 1;
4592: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4593: $canclone = 1;
4594: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4595: $canclone = 1;
4596: }
4597: }
4598: unless ($canclone) {
4599: if ($cloneruname ne '' && $clonerudom ne '') {
4600: if ($cc_clone{$unesc_key}) {
4601: $canclone = 1;
4602: $items->{'cloners'} .= ','.$cloneruname.':'.
4603: $clonerudom;
4604: $valchange = 1;
4605: }
4606: }
4607: }
4608: } elsif (defined($cloneruname)) {
4609: if ($cc_clone{$unesc_key}) {
4610: $canclone = 1;
4611: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4612: $valchange = 1;
4613: }
4614: unless ($canclone) {
4615: if ($items->{'owner'} =~ /:/) {
4616: if ($items->{'owner'} eq $cloner) {
4617: $canclone = 1;
4618: }
4619: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4620: $canclone = 1;
4621: }
4622: if ($canclone) {
4623: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4624: $valchange = 1;
4625: }
4626: }
4627: }
4628: }
4629: if ($unpack || !$rtn_as_hash) {
4630: $unesc_val{'descr'} = $items->{'description'};
4631: $unesc_val{'inst_code'} = $items->{'inst_code'};
4632: $unesc_val{'owner'} = $items->{'owner'};
4633: $unesc_val{'type'} = $items->{'type'};
4634: $unesc_val{'cloners'} = $items->{'cloners'};
4635: $unesc_val{'created'} = $items->{'created'};
4636: $unesc_val{'context'} = $items->{'context'};
4637: }
4638: $selfenroll_types = $items->{'selfenroll_types'};
4639: $selfenroll_end = $items->{'selfenroll_end_date'};
4640: $created = $items->{'created'};
4641: $context = $items->{'context'};
4642: if ($hasuniquecode ne '.') {
4643: next unless ($items->{'uniquecode'});
4644: }
4645: if ($selfenrollonly) {
4646: next if (!$selfenroll_types);
4647: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4648: next;
4649: }
4650: }
4651: if ($creationcontext ne '.') {
4652: next if (($context ne '') && ($context ne $creationcontext));
4653: }
4654: if ($createdbefore > 0) {
4655: next if (($created eq '') || ($created > $createdbefore));
4656: }
4657: if ($createdafter > 0) {
4658: next if (($created eq '') || ($created <= $createdafter));
4659: }
4660: if ($catfilter ne '') {
4661: next if ($items->{'categories'} eq '');
4662: my @categories = split('&',$items->{'categories'});
4663: next if (@categories == 0);
4664: my @subcats = split('&',$catfilter);
4665: my $matchcat = 0;
4666: foreach my $cat (@categories) {
4667: if (grep(/^\Q$cat\E$/,@subcats)) {
4668: $matchcat = 1;
4669: last;
4670: }
4671: }
4672: next if (!$matchcat);
4673: }
4674: if ($caller eq 'coursecatalog') {
4675: if ($items->{'hidefromcat'} eq 'yes') {
4676: next if !$showhidden;
4677: }
4678: }
4679: } else {
4680: next if ($catfilter ne '');
4681: next if ($selfenrollonly);
4682: next if ($createdbefore || $createdafter);
4683: next if ($creationcontext ne '.');
4684: if ((defined($clonerudom)) && (defined($cloneruname))) {
4685: if ($cc_clone{$unesc_key}) {
4686: $canclone = 1;
4687: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4688: }
4689: }
4690: $is_hash = 0;
4691: my @courseitems = split(/:/,$value);
4692: $lasttime = pop(@courseitems);
4693: if ($hashref->{$lasttime_key} eq '') {
4694: next if ($lasttime<$since);
4695: }
4696: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4697: }
4698: if ($cloneonly) {
4699: next unless ($canclone);
4700: }
4701: my $match = 1;
4702: if ($description ne '.') {
4703: if (!$is_hash) {
4704: $unesc_val{'descr'} = &unescape($val{'descr'});
4705: }
4706: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4707: $match = 0;
4708: }
4709: }
4710: if ($instcodefilter ne '.') {
4711: if (!$is_hash) {
4712: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4713: }
4714: if ($regexp_ok == 1) {
4715: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4716: $match = 0;
4717: }
4718: } elsif ($regexp_ok == -1) {
4719: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4720: $match = 0;
4721: }
4722: } else {
4723: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4724: $match = 0;
4725: }
4726: }
4727: }
4728: if ($ownerfilter ne '.') {
4729: if (!$is_hash) {
4730: $unesc_val{'owner'} = &unescape($val{'owner'});
4731: }
4732: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4733: if ($unesc_val{'owner'} =~ /:/) {
4734: if (eval{$unesc_val{'owner'} !~
4735: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4736: $match = 0;
4737: }
4738: } else {
4739: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4740: $match = 0;
4741: }
4742: }
4743: } elsif ($ownerunamefilter ne '') {
4744: if ($unesc_val{'owner'} =~ /:/) {
4745: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4746: $match = 0;
4747: }
4748: } else {
4749: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4750: $match = 0;
4751: }
4752: }
4753: } elsif ($ownerdomfilter ne '') {
4754: if ($unesc_val{'owner'} =~ /:/) {
4755: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4756: $match = 0;
4757: }
4758: } else {
4759: if ($ownerdomfilter ne $udom) {
4760: $match = 0;
4761: }
4762: }
4763: }
4764: }
4765: if ($coursefilter ne '.') {
4766: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4767: $match = 0;
4768: }
4769: }
4770: if ($typefilter ne '.') {
4771: if (!$is_hash) {
4772: $unesc_val{'type'} = &unescape($val{'type'});
4773: }
4774: if ($unesc_val{'type'} eq '') {
4775: if ($typefilter ne 'Course') {
4776: $match = 0;
4777: }
4778: } else {
4779: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4780: $match = 0;
4781: }
4782: }
4783: }
4784: if ($match == 1) {
4785: if ($rtn_as_hash) {
4786: if ($is_hash) {
4787: if ($valchange) {
4788: my $newvalue = &Apache::lonnet::freeze_escape($items);
4789: $qresult.=$key.'='.$newvalue.'&';
4790: } else {
4791: $qresult.=$key.'='.$value.'&';
4792: }
4793: } else {
4794: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4795: 'inst_code' => &unescape($val{'inst_code'}),
4796: 'owner' => &unescape($val{'owner'}),
4797: 'type' => &unescape($val{'type'}),
4798: 'cloners' => &unescape($val{'cloners'}),
4799: );
4800: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4801: $qresult.=$key.'='.$items.'&';
4802: }
4803: } else {
4804: if ($is_hash) {
4805: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4806: &escape($unesc_val{'inst_code'}).':'.
4807: &escape($unesc_val{'owner'}).'&';
4808: } else {
4809: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4810: ':'.$val{'owner'}.'&';
4811: }
4812: }
4813: }
4814: }
4815: if (&untie_domain_hash($hashref)) {
4816: chop($qresult);
4817: &Reply($client, \$qresult, $userinput);
4818: } else {
4819: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4820: "while attempting courseiddump\n", $userinput);
4821: }
4822: } else {
4823: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4824: "while attempting courseiddump\n", $userinput);
4825: }
4826: return 1;
4827: }
4828: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4829:
4830: sub course_lastaccess_handler {
4831: my ($cmd, $tail, $client) = @_;
4832: my $userinput = "$cmd:$tail";
4833: my ($cdom,$cnum) = split(':',$tail);
4834: my (%lastaccess,$qresult);
4835: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4836: if ($hashref) {
4837: while (my ($key,$value) = each(%$hashref)) {
4838: my ($unesc_key,$lasttime);
4839: $unesc_key = &unescape($key);
4840: if ($cnum) {
4841: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4842: }
4843: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4844: $lastaccess{$1} = $value;
4845: } else {
4846: my $items = &Apache::lonnet::thaw_unescape($value);
4847: if (ref($items) eq 'HASH') {
4848: unless ($lastaccess{$unesc_key}) {
4849: $lastaccess{$unesc_key} = '';
4850: }
4851: } else {
4852: my @courseitems = split(':',$value);
4853: $lastaccess{$unesc_key} = pop(@courseitems);
4854: }
4855: }
4856: }
4857: foreach my $cid (sort(keys(%lastaccess))) {
4858: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4859: }
4860: if (&untie_domain_hash($hashref)) {
4861: if ($qresult) {
4862: chop($qresult);
4863: }
4864: &Reply($client, \$qresult, $userinput);
4865: } else {
4866: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4867: "while attempting lastacourseaccess\n", $userinput);
4868: }
4869: } else {
4870: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4871: "while attempting lastcourseaccess\n", $userinput);
4872: }
4873: return 1;
4874: }
4875: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4876:
4877: sub course_sessions_handler {
4878: my ($cmd, $tail, $client) = @_;
4879: my $userinput = "$cmd:$tail";
4880: my ($cdom,$cnum,$lastactivity) = split(':',$tail);
4881: my $dbsuffix = '_'.$cdom.'_'.$cnum.'.db';
4882: my (%sessions,$qresult);
4883: my $now=time;
4884: if (opendir(DIR,$perlvar{'lonIDsDir'})) {
4885: my $filename;
4886: while ($filename=readdir(DIR)) {
4887: next if ($filename=~/^\./);
4888: next if ($filename=~/^publicuser_/);
4889: next if ($filename=~/^[a-f0-9]+_(linked|lti_\d+)\.id$/);
4890: if ($filename =~ /^($LONCAPA::match_username)_\d+_($LONCAPA::match_domain)_/) {
4891: my ($uname,$udom) = ($1,$2);
4892: next unless (-e "$perlvar{'lonDaemons'}/tmp/$uname$dbsuffix");
4893: my $mtime = (stat("$perlvar{'lonIDsDir'}/$filename"))[9];
4894: my $since=$now-$mtime;
4895: if ($lastactivity < 0) {
4896: next if ($since <= $lastactivity);
4897: } else {
4898: next if ($since > $lastactivity);
4899: }
4900: $sessions{$uname.':'.$udom} = $mtime;
4901: }
4902: }
4903: closedir(DIR);
4904: }
4905: foreach my $user (keys(%sessions)) {
4906: $qresult.=&escape($user).'='.$sessions{$user}.'&';
4907: }
4908: if ($qresult) {
4909: chop($qresult);
4910: }
4911: &Reply($client, \$qresult, $userinput);
4912: return 1;
4913: }
4914: ®ister_handler("coursesessions",\&course_sessions_handler, 0, 1, 0);
4915:
4916: #
4917: # Puts an unencrypted entry in a namespace db file at the domain level
4918: #
4919: # Parameters:
4920: # $cmd - The command that got us here.
4921: # $tail - Tail of the command (remaining parameters).
4922: # $client - File descriptor connected to client.
4923: # Returns
4924: # 0 - Requested to exit, caller should shut down.
4925: # 1 - Continue processing.
4926: # Side effects:
4927: # reply is written to $client.
4928: #
4929: sub put_domain_handler {
4930: my ($cmd,$tail,$client) = @_;
4931:
4932: my $userinput = "$cmd:$tail";
4933:
4934: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4935: chomp($what);
4936: my @pairs=split(/\&/,$what);
4937: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4938: "P", $what);
4939: if ($hashref) {
4940: foreach my $pair (@pairs) {
4941: my ($key,$value)=split(/=/,$pair);
4942: $hashref->{$key}=$value;
4943: }
4944: if (&untie_domain_hash($hashref)) {
4945: &Reply($client, "ok\n", $userinput);
4946: } else {
4947: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4948: "while attempting putdom\n", $userinput);
4949: }
4950: } else {
4951: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4952: "while attempting putdom\n", $userinput);
4953: }
4954:
4955: return 1;
4956: }
4957: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4958:
4959: # Updates one or more entries in clickers.db file at the domain level
4960: #
4961: # Parameters:
4962: # $cmd - The command that got us here.
4963: # $tail - Tail of the command (remaining parameters).
4964: # In this case a colon separated list containing:
4965: # (a) the domain for which we are updating the entries,
4966: # (b) the action required -- add or del -- and
4967: # (c) a &-separated list of entries to add or delete.
4968: # $client - File descriptor connected to client.
4969: # Returns
4970: # 1 - Continue processing.
4971: # 0 - Requested to exit, caller should shut down.
4972: # Side effects:
4973: # reply is written to $client.
4974: #
4975:
4976:
4977: sub update_clickers {
4978: my ($cmd, $tail, $client) = @_;
4979:
4980: my $userinput = "$cmd:$tail";
4981: my ($udom,$action,$what) =split(/:/,$tail,3);
4982: chomp($what);
4983:
4984: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
4985: "U","$action:$what");
4986:
4987: if (!$hashref) {
4988: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4989: "while attempting updateclickers\n", $userinput);
4990: return 1;
4991: }
4992:
4993: my @pairs=split(/\&/,$what);
4994: foreach my $pair (@pairs) {
4995: my ($key,$value)=split(/=/,$pair);
4996: if ($action eq 'add') {
4997: if (exists($hashref->{$key})) {
4998: my @newvals = split(/,/,&unescape($value));
4999: my @currvals = split(/,/,&unescape($hashref->{$key}));
5000: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
5001: $hashref->{$key}=&escape(join(',',@merged));
5002: } else {
5003: $hashref->{$key}=$value;
5004: }
5005: } elsif ($action eq 'del') {
5006: if (exists($hashref->{$key})) {
5007: my %current;
5008: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
5009: map { delete($current{$_}); } split(/,/,&unescape($value));
5010: if (keys(%current)) {
5011: $hashref->{$key}=&escape(join(',',sort(keys(%current))));
5012: } else {
5013: delete($hashref->{$key});
5014: }
5015: }
5016: }
5017: }
5018: if (&untie_user_hash($hashref)) {
5019: &Reply( $client, "ok\n", $userinput);
5020: } else {
5021: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
5022: "while attempting put\n",
5023: $userinput);
5024: }
5025: return 1;
5026: }
5027: ®ister_handler("updateclickers", \&update_clickers, 0, 1, 0);
5028:
5029:
5030: # Deletes one or more entries in a namespace db file at the domain level
5031: #
5032: # Parameters:
5033: # $cmd - The command that got us here.
5034: # $tail - Tail of the command (remaining parameters).
5035: # In this case a colon separated list containing:
5036: # (a) the domain for which we are deleting the entries,
5037: # (b) &-separated list of keys to delete.
5038: # $client - File descriptor connected to client.
5039: # Returns
5040: # 1 - Continue processing.
5041: # 0 - Requested to exit, caller should shut down.
5042: # Side effects:
5043: # reply is written to $client.
5044: #
5045:
5046: sub del_domain_handler {
5047: my ($cmd,$tail,$client) = @_;
5048:
5049: my $userinput = "$cmd:$tail";
5050:
5051: my ($udom,$namespace,$what)=split(/:/,$tail,3);
5052: chomp($what);
5053: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
5054: "D", $what);
5055: if ($hashref) {
5056: my @keys=split(/\&/,$what);
5057: foreach my $key (@keys) {
5058: delete($hashref->{$key});
5059: }
5060: if (&untie_user_hash($hashref)) {
5061: &Reply($client, "ok\n", $userinput);
5062: } else {
5063: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5064: "while attempting deldom\n", $userinput);
5065: }
5066: } else {
5067: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5068: "while attempting deldom\n", $userinput);
5069: }
5070: return 1;
5071: }
5072: ®ister_handler("deldom", \&del_domain_handler, 0, 1, 0);
5073:
5074:
5075: # Unencrypted get from the namespace database file at the domain level.
5076: # This function retrieves a keyed item from a specific named database in the
5077: # domain directory.
5078: #
5079: # Parameters:
5080: # $cmd - Command request keyword (get).
5081: # $tail - Tail of the command. This is a colon separated list
5082: # consisting of the domain and the 'namespace'
5083: # which selects the gdbm file to do the lookup in,
5084: # & separated list of keys to lookup. Note that
5085: # the values are returned as an & separated list too.
5086: # $client - File descriptor open on the client.
5087: # Returns:
5088: # 1 - Continue processing.
5089: # 0 - Exit.
5090: # Side effects:
5091: # reply is written to $client.
5092: #
5093:
5094: sub get_domain_handler {
5095: my ($cmd, $tail, $client) = @_;
5096:
5097:
5098: my $userinput = "$cmd:$tail";
5099:
5100: my ($udom,$namespace,$what)=split(/:/,$tail,3);
5101: chomp($what);
5102: if ($namespace =~ /^enc/) {
5103: &Failure( $client, "refused\n", $userinput);
5104: } else {
5105: my @queries=split(/\&/,$what);
5106: my $qresult='';
5107: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
5108: if ($hashref) {
5109: for (my $i=0;$i<=$#queries;$i++) {
5110: $qresult.="$hashref->{$queries[$i]}&";
5111: }
5112: if (&untie_domain_hash($hashref)) {
5113: $qresult=~s/\&$//;
5114: &Reply($client, \$qresult, $userinput);
5115: } else {
5116: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
5117: "while attempting getdom\n",$userinput);
5118: }
5119: } else {
5120: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5121: "while attempting getdom\n",$userinput);
5122: }
5123: }
5124:
5125: return 1;
5126: }
5127: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
5128:
5129: sub encrypted_get_domain_handler {
5130: my ($cmd, $tail, $client) = @_;
5131:
5132: my $userinput = "$cmd:$tail";
5133:
5134: my ($udom,$namespace,$what)=split(/:/,$tail,3);
5135: chomp($what);
5136: my @queries=split(/\&/,$what);
5137: my $qresult='';
5138: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
5139: if ($hashref) {
5140: for (my $i=0;$i<=$#queries;$i++) {
5141: $qresult.="$hashref->{$queries[$i]}&";
5142: }
5143: if (&untie_domain_hash($hashref)) {
5144: $qresult=~s/\&$//;
5145: if ($cipher) {
5146: my $cmdlength=length($qresult);
5147: $qresult.=" ";
5148: my $encqresult='';
5149: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
5150: $encqresult.= unpack("H16",
5151: $cipher->encrypt(substr($qresult,
5152: $encidx,
5153: 8)));
5154: }
5155: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
5156: } else {
5157: &Failure( $client, "error:no_key\n", $userinput);
5158: }
5159: } else {
5160: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
5161: "while attempting egetdom\n",$userinput);
5162: }
5163: } else {
5164: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5165: "while attempting egetdom\n",$userinput);
5166: }
5167: return 1;
5168: }
5169: ®ister_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0);
5170:
5171: #
5172: # Puts an id to a domains id database.
5173: #
5174: # Parameters:
5175: # $cmd - The command that triggered us.
5176: # $tail - Remainder of the request other than the command. This is a
5177: # colon separated list containing:
5178: # $domain - The domain for which we are writing the id.
5179: # $pairs - The id info to write... this is and & separated list
5180: # of keyword=value.
5181: # $client - Socket open on the client.
5182: # Returns:
5183: # 1 - Continue processing.
5184: # Side effects:
5185: # reply is written to $client.
5186: #
5187: sub put_id_handler {
5188: my ($cmd,$tail,$client) = @_;
5189:
5190:
5191: my $userinput = "$cmd:$tail";
5192:
5193: my ($udom,$what)=split(/:/,$tail);
5194: chomp($what);
5195: my @pairs=split(/\&/,$what);
5196: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
5197: "P", $what);
5198: if ($hashref) {
5199: foreach my $pair (@pairs) {
5200: my ($key,$value)=split(/=/,$pair);
5201: $hashref->{$key}=$value;
5202: }
5203: if (&untie_domain_hash($hashref)) {
5204: &Reply($client, "ok\n", $userinput);
5205: } else {
5206: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5207: "while attempting idput\n", $userinput);
5208: }
5209: } else {
5210: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5211: "while attempting idput\n", $userinput);
5212: }
5213:
5214: return 1;
5215: }
5216: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
5217:
5218: #
5219: # Retrieves a set of id values from the id database.
5220: # Returns an & separated list of results, one for each requested id to the
5221: # client.
5222: #
5223: # Parameters:
5224: # $cmd - Command keyword that caused us to be dispatched.
5225: # $tail - Tail of the command. Consists of a colon separated:
5226: # domain - the domain whose id table we dump
5227: # ids Consists of an & separated list of
5228: # id keywords whose values will be fetched.
5229: # nonexisting keywords will have an empty value.
5230: # $client - Socket open on the client.
5231: #
5232: # Returns:
5233: # 1 - indicating processing should continue.
5234: # Side effects:
5235: # An & separated list of results is written to $client.
5236: #
5237: sub get_id_handler {
5238: my ($cmd, $tail, $client) = @_;
5239:
5240:
5241: my $userinput = "$client:$tail";
5242:
5243: my ($udom,$what)=split(/:/,$tail);
5244: chomp($what);
5245: my @queries=split(/\&/,$what);
5246: my $qresult='';
5247: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
5248: if ($hashref) {
5249: for (my $i=0;$i<=$#queries;$i++) {
5250: $qresult.="$hashref->{$queries[$i]}&";
5251: }
5252: if (&untie_domain_hash($hashref)) {
5253: $qresult=~s/\&$//;
5254: &Reply($client, \$qresult, $userinput);
5255: } else {
5256: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
5257: "while attempting idget\n",$userinput);
5258: }
5259: } else {
5260: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5261: "while attempting idget\n",$userinput);
5262: }
5263:
5264: return 1;
5265: }
5266: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
5267:
5268: # Deletes one or more ids in a domain's id database.
5269: #
5270: # Parameters:
5271: # $cmd - Command keyword (iddel).
5272: # $tail - Command tail. In this case a colon
5273: # separated list containing:
5274: # The domain for which we are deleting the id(s).
5275: # &-separated list of id(s) to delete.
5276: # $client - File open on client socket.
5277: # Returns:
5278: # 1 - Continue processing
5279: # 0 - Exit server.
5280: #
5281: #
5282:
5283: sub del_id_handler {
5284: my ($cmd,$tail,$client) = @_;
5285:
5286: my $userinput = "$cmd:$tail";
5287:
5288: my ($udom,$what)=split(/:/,$tail);
5289: chomp($what);
5290: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
5291: "D", $what);
5292: if ($hashref) {
5293: my @keys=split(/\&/,$what);
5294: foreach my $key (@keys) {
5295: delete($hashref->{$key});
5296: }
5297: if (&untie_user_hash($hashref)) {
5298: &Reply($client, "ok\n", $userinput);
5299: } else {
5300: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5301: "while attempting iddel\n", $userinput);
5302: }
5303: } else {
5304: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5305: "while attempting iddel\n", $userinput);
5306: }
5307: return 1;
5308: }
5309: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
5310:
5311: #
5312: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
5313: #
5314: # Parameters
5315: # $cmd - Command keyword that caused us to be dispatched.
5316: # $tail - Tail of the command. Consists of a colon separated:
5317: # domain - the domain whose dcmail we are recording
5318: # email Consists of key=value pair
5319: # where key is unique msgid
5320: # and value is message (in XML)
5321: # $client - Socket open on the client.
5322: #
5323: # Returns:
5324: # 1 - indicating processing should continue.
5325: # Side effects
5326: # reply is written to $client.
5327: #
5328: sub put_dcmail_handler {
5329: my ($cmd,$tail,$client) = @_;
5330: my $userinput = "$cmd:$tail";
5331:
5332:
5333: my ($udom,$what)=split(/:/,$tail);
5334: chomp($what);
5335: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5336: if ($hashref) {
5337: my ($key,$value)=split(/=/,$what);
5338: $hashref->{$key}=$value;
5339: }
5340: if (&untie_domain_hash($hashref)) {
5341: &Reply($client, "ok\n", $userinput);
5342: } else {
5343: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5344: "while attempting dcmailput\n", $userinput);
5345: }
5346: return 1;
5347: }
5348: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
5349:
5350: #
5351: # Retrieves broadcast e-mail from nohist_dcmail database
5352: # Returns to client an & separated list of key=value pairs,
5353: # where key is msgid and value is message information.
5354: #
5355: # Parameters
5356: # $cmd - Command keyword that caused us to be dispatched.
5357: # $tail - Tail of the command. Consists of a colon separated:
5358: # domain - the domain whose dcmail table we dump
5359: # startfilter - beginning of time window
5360: # endfilter - end of time window
5361: # sendersfilter - & separated list of username:domain
5362: # for senders to search for.
5363: # $client - Socket open on the client.
5364: #
5365: # Returns:
5366: # 1 - indicating processing should continue.
5367: # Side effects
5368: # reply (& separated list of msgid=messageinfo pairs) is
5369: # written to $client.
5370: #
5371: sub dump_dcmail_handler {
5372: my ($cmd, $tail, $client) = @_;
5373:
5374: my $userinput = "$cmd:$tail";
5375: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
5376: chomp($sendersfilter);
5377: my @senders = ();
5378: if (defined($startfilter)) {
5379: $startfilter=&unescape($startfilter);
5380: } else {
5381: $startfilter='.';
5382: }
5383: if (defined($endfilter)) {
5384: $endfilter=&unescape($endfilter);
5385: } else {
5386: $endfilter='.';
5387: }
5388: if (defined($sendersfilter)) {
5389: $sendersfilter=&unescape($sendersfilter);
5390: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
5391: }
5392:
5393: my $qresult='';
5394: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5395: if ($hashref) {
5396: while (my ($key,$value) = each(%$hashref)) {
5397: my $match = 1;
5398: my ($timestamp,$subj,$uname,$udom) =
5399: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
5400: $subj = &unescape($subj);
5401: unless ($startfilter eq '.' || !defined($startfilter)) {
5402: if ($timestamp < $startfilter) {
5403: $match = 0;
5404: }
5405: }
5406: unless ($endfilter eq '.' || !defined($endfilter)) {
5407: if ($timestamp > $endfilter) {
5408: $match = 0;
5409: }
5410: }
5411: unless (@senders < 1) {
5412: unless (grep/^$uname:$udom$/,@senders) {
5413: $match = 0;
5414: }
5415: }
5416: if ($match == 1) {
5417: $qresult.=$key.'='.$value.'&';
5418: }
5419: }
5420: if (&untie_domain_hash($hashref)) {
5421: chop($qresult);
5422: &Reply($client, \$qresult, $userinput);
5423: } else {
5424: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5425: "while attempting dcmaildump\n", $userinput);
5426: }
5427: } else {
5428: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5429: "while attempting dcmaildump\n", $userinput);
5430: }
5431: return 1;
5432: }
5433:
5434: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
5435:
5436: #
5437: # Puts domain roles in nohist_domainroles database
5438: #
5439: # Parameters
5440: # $cmd - Command keyword that caused us to be dispatched.
5441: # $tail - Tail of the command. Consists of a colon separated:
5442: # domain - the domain whose roles we are recording
5443: # role - Consists of key=value pair
5444: # where key is unique role
5445: # and value is start/end date information
5446: # $client - Socket open on the client.
5447: #
5448: # Returns:
5449: # 1 - indicating processing should continue.
5450: # Side effects
5451: # reply is written to $client.
5452: #
5453:
5454: sub put_domainroles_handler {
5455: my ($cmd,$tail,$client) = @_;
5456:
5457: my $userinput = "$cmd:$tail";
5458: my ($udom,$what)=split(/:/,$tail);
5459: chomp($what);
5460: my @pairs=split(/\&/,$what);
5461: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5462: if ($hashref) {
5463: foreach my $pair (@pairs) {
5464: my ($key,$value)=split(/=/,$pair);
5465: $hashref->{$key}=$value;
5466: }
5467: if (&untie_domain_hash($hashref)) {
5468: &Reply($client, "ok\n", $userinput);
5469: } else {
5470: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5471: "while attempting domroleput\n", $userinput);
5472: }
5473: } else {
5474: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5475: "while attempting domroleput\n", $userinput);
5476: }
5477:
5478: return 1;
5479: }
5480:
5481: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
5482:
5483: #
5484: # Retrieves domain roles from nohist_domainroles database
5485: # Returns to client an & separated list of key=value pairs,
5486: # where key is role and value is start and end date information.
5487: #
5488: # Parameters
5489: # $cmd - Command keyword that caused us to be dispatched.
5490: # $tail - Tail of the command. Consists of a colon separated:
5491: # domain - the domain whose domain roles table we dump
5492: # $client - Socket open on the client.
5493: #
5494: # Returns:
5495: # 1 - indicating processing should continue.
5496: # Side effects
5497: # reply (& separated list of role=start/end info pairs) is
5498: # written to $client.
5499: #
5500: sub dump_domainroles_handler {
5501: my ($cmd, $tail, $client) = @_;
5502:
5503: my $userinput = "$cmd:$tail";
5504: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
5505: chomp($rolesfilter);
5506: my @roles = ();
5507: if (defined($startfilter)) {
5508: $startfilter=&unescape($startfilter);
5509: } else {
5510: $startfilter='.';
5511: }
5512: if (defined($endfilter)) {
5513: $endfilter=&unescape($endfilter);
5514: } else {
5515: $endfilter='.';
5516: }
5517: if (defined($rolesfilter)) {
5518: $rolesfilter=&unescape($rolesfilter);
5519: @roles = split(/\&/,$rolesfilter);
5520: }
5521:
5522: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5523: if ($hashref) {
5524: my $qresult = '';
5525: while (my ($key,$value) = each(%$hashref)) {
5526: my $match = 1;
5527: my ($end,$start) = split(/:/,&unescape($value));
5528: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
5529: unless (@roles < 1) {
5530: unless (grep/^\Q$trole\E$/,@roles) {
5531: $match = 0;
5532: next;
5533: }
5534: }
5535: unless ($startfilter eq '.' || !defined($startfilter)) {
5536: if ((defined($start)) && ($start >= $startfilter)) {
5537: $match = 0;
5538: next;
5539: }
5540: }
5541: unless ($endfilter eq '.' || !defined($endfilter)) {
5542: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
5543: $match = 0;
5544: next;
5545: }
5546: }
5547: if ($match == 1) {
5548: $qresult.=$key.'='.$value.'&';
5549: }
5550: }
5551: if (&untie_domain_hash($hashref)) {
5552: chop($qresult);
5553: &Reply($client, \$qresult, $userinput);
5554: } else {
5555: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5556: "while attempting domrolesdump\n", $userinput);
5557: }
5558: } else {
5559: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5560: "while attempting domrolesdump\n", $userinput);
5561: }
5562: return 1;
5563: }
5564:
5565: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
5566:
5567:
5568: # Process the tmpput command I'm not sure what this does.. Seems to
5569: # create a file in the lonDaemons/tmp directory of the form $id.tmp
5570: # where Id is the client's ip concatenated with a sequence number.
5571: # The file will contain some value that is passed in. Is this e.g.
5572: # a login token?
5573: #
5574: # Parameters:
5575: # $cmd - The command that got us dispatched.
5576: # $tail - The remainder of the request following $cmd:
5577: # In this case this will be the contents of the file.
5578: # $client - Socket connected to the client.
5579: # Returns:
5580: # 1 indicating processing can continue.
5581: # Side effects:
5582: # A file is created in the local filesystem.
5583: # A reply is sent to the client.
5584: sub tmp_put_handler {
5585: my ($cmd, $what, $client) = @_;
5586:
5587: my $userinput = "$cmd:$what"; # Reconstruct for logging.
5588:
5589: my ($record,$context) = split(/:/,$what);
5590: if ($context ne '') {
5591: chomp($context);
5592: $context = &unescape($context);
5593: }
5594: my ($id,$store);
5595: $tmpsnum++;
5596: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
5597: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
5598: } else {
5599: $id = $$.'_'.$clientip.'_'.$tmpsnum;
5600: }
5601: $id=~s/\W/\_/g;
5602: $record=~s/\n//g;
5603: my $execdir=$perlvar{'lonDaemons'};
5604: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
5605: print $store $record;
5606: close $store;
5607: &Reply($client, \$id, $userinput);
5608: } else {
5609: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5610: "while attempting tmpput\n", $userinput);
5611: }
5612: return 1;
5613:
5614: }
5615: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
5616:
5617: # Processes the tmpget command. This command returns the contents
5618: # of a temporary resource file(?) created via tmpput.
5619: #
5620: # Paramters:
5621: # $cmd - Command that got us dispatched.
5622: # $id - Tail of the command, contain the id of the resource
5623: # we want to fetch.
5624: # $client - socket open on the client.
5625: # Return:
5626: # 1 - Inidcating processing can continue.
5627: # Side effects:
5628: # A reply is sent to the client.
5629: #
5630: sub tmp_get_handler {
5631: my ($cmd, $id, $client) = @_;
5632:
5633: my $userinput = "$cmd:$id";
5634:
5635:
5636: $id=~s/\W/\_/g;
5637: my $store;
5638: my $execdir=$perlvar{'lonDaemons'};
5639: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
5640: my $reply=<$store>;
5641: &Reply( $client, \$reply, $userinput);
5642: close $store;
5643: } else {
5644: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5645: "while attempting tmpget\n", $userinput);
5646: }
5647:
5648: return 1;
5649: }
5650: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
5651:
5652: #
5653: # Process the tmpdel command. This command deletes a temp resource
5654: # created by the tmpput command.
5655: #
5656: # Parameters:
5657: # $cmd - Command that got us here.
5658: # $id - Id of the temporary resource created.
5659: # $client - socket open on the client process.
5660: #
5661: # Returns:
5662: # 1 - Indicating processing should continue.
5663: # Side Effects:
5664: # A file is deleted
5665: # A reply is sent to the client.
5666: sub tmp_del_handler {
5667: my ($cmd, $id, $client) = @_;
5668:
5669: my $userinput= "$cmd:$id";
5670:
5671: chomp($id);
5672: $id=~s/\W/\_/g;
5673: my $execdir=$perlvar{'lonDaemons'};
5674: if (unlink("$execdir/tmp/$id.tmp")) {
5675: &Reply($client, "ok\n", $userinput);
5676: } else {
5677: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
5678: "while attempting tmpdel\n", $userinput);
5679: }
5680:
5681: return 1;
5682:
5683: }
5684: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
5685:
5686: #
5687: # Process the delbalcookie command. This command deletes a balancer
5688: # cookie in the lonBalancedir directory created by switchserver
5689: #
5690: # Parameters:
5691: # $cmd - Command that got us here.
5692: # $cookie - Cookie to be deleted.
5693: # $client - socket open on the client process.
5694: #
5695: # Returns:
5696: # 1 - Indicating processing should continue.
5697: # Side Effects:
5698: # A cookie file is deleted from the lonBalancedir directory
5699: # A reply is sent to the client.
5700: sub del_balcookie_handler {
5701: my ($cmd, $cookie, $client) = @_;
5702:
5703: my $userinput= "$cmd:$cookie";
5704:
5705: chomp($cookie);
5706: my $deleted = '';
5707: if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
5708: my $execdir=$perlvar{'lonBalanceDir'};
5709: if (-e "$execdir/$cookie.id") {
5710: if (open(my $fh,'<',"$execdir/$cookie.id")) {
5711: my $dodelete;
5712: while (my $line = <$fh>) {
5713: chomp($line);
5714: if ($line eq $clientname) {
5715: $dodelete = 1;
5716: last;
5717: }
5718: }
5719: close($fh);
5720: if ($dodelete) {
5721: if (unlink("$execdir/$cookie.id")) {
5722: $deleted = 1;
5723: }
5724: }
5725: }
5726: }
5727: }
5728: if ($deleted) {
5729: &Reply($client, "ok\n", $userinput);
5730: } else {
5731: &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ".
5732: "while attempting delbalcookie\n", $userinput);
5733: }
5734: return 1;
5735: }
5736: ®ister_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0);
5737:
5738: #
5739: # Processes the setannounce command. This command
5740: # creates a file named announce.txt in the top directory of
5741: # the documentn root and sets its contents. The announce.txt file is
5742: # printed in its entirety at the LonCAPA login page. Note:
5743: # once the announcement.txt fileis created it cannot be deleted.
5744: # However, setting the contents of the file to empty removes the
5745: # announcement from the login page of loncapa so who cares.
5746: #
5747: # Parameters:
5748: # $cmd - The command that got us dispatched.
5749: # $announcement - The text of the announcement.
5750: # $client - Socket open on the client process.
5751: # Retunrns:
5752: # 1 - Indicating request processing should continue
5753: # Side Effects:
5754: # The file {DocRoot}/announcement.txt is created.
5755: # A reply is sent to $client.
5756: #
5757: sub set_announce_handler {
5758: my ($cmd, $announcement, $client) = @_;
5759:
5760: my $userinput = "$cmd:$announcement";
5761:
5762: chomp($announcement);
5763: $announcement=&unescape($announcement);
5764: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
5765: '/announcement.txt')) {
5766: print $store $announcement;
5767: close $store;
5768: &Reply($client, "ok\n", $userinput);
5769: } else {
5770: &Failure($client, "error: ".($!+0)."\n", $userinput);
5771: }
5772:
5773: return 1;
5774: }
5775: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
5776:
5777: #
5778: # Return the version of the daemon. This can be used to determine
5779: # the compatibility of cross version installations or, alternatively to
5780: # simply know who's out of date and who isn't. Note that the version
5781: # is returned concatenated with the tail.
5782: # Parameters:
5783: # $cmd - the request that dispatched to us.
5784: # $tail - Tail of the request (client's version?).
5785: # $client - Socket open on the client.
5786: #Returns:
5787: # 1 - continue processing requests.
5788: # Side Effects:
5789: # Replies with version to $client.
5790: sub get_version_handler {
5791: my ($cmd, $tail, $client) = @_;
5792:
5793: my $userinput = $cmd.$tail;
5794:
5795: &Reply($client, &version($userinput)."\n", $userinput);
5796:
5797:
5798: return 1;
5799: }
5800: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
5801:
5802: # Set the current host and domain. This is used to support
5803: # multihomed systems. Each IP of the system, or even separate daemons
5804: # on the same IP can be treated as handling a separate lonCAPA virtual
5805: # machine. This command selects the virtual lonCAPA. The client always
5806: # knows the right one since it is lonc and it is selecting the domain/system
5807: # from the hosts.tab file.
5808: # Parameters:
5809: # $cmd - Command that dispatched us.
5810: # $tail - Tail of the command (domain/host requested).
5811: # $socket - Socket open on the client.
5812: #
5813: # Returns:
5814: # 1 - Indicates the program should continue to process requests.
5815: # Side-effects:
5816: # The default domain/system context is modified for this daemon.
5817: # a reply is sent to the client.
5818: #
5819: sub set_virtual_host_handler {
5820: my ($cmd, $tail, $socket) = @_;
5821:
5822: my $userinput ="$cmd:$tail";
5823:
5824: &Reply($client, &sethost($userinput)."\n", $userinput);
5825:
5826:
5827: return 1;
5828: }
5829: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
5830:
5831: # Process a request to exit:
5832: # - "bye" is sent to the client.
5833: # - The client socket is shutdown and closed.
5834: # - We indicate to the caller that we should exit.
5835: # Formal Parameters:
5836: # $cmd - The command that got us here.
5837: # $tail - Tail of the command (empty).
5838: # $client - Socket open on the tail.
5839: # Returns:
5840: # 0 - Indicating the program should exit!!
5841: #
5842: sub exit_handler {
5843: my ($cmd, $tail, $client) = @_;
5844:
5845: my $userinput = "$cmd:$tail";
5846:
5847: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5848: &Reply($client, "bye\n", $userinput);
5849: $client->shutdown(2); # shutdown the socket forcibly.
5850: $client->close();
5851:
5852: return 0;
5853: }
5854: ®ister_handler("exit", \&exit_handler, 0,1,1);
5855: ®ister_handler("init", \&exit_handler, 0,1,1);
5856: ®ister_handler("quit", \&exit_handler, 0,1,1);
5857:
5858: # Determine if auto-enrollment is enabled.
5859: # Note that the original had what I believe to be a defect.
5860: # The original returned 0 if the requestor was not a registerd client.
5861: # It should return "refused".
5862: # Formal Parameters:
5863: # $cmd - The command that invoked us.
5864: # $tail - The tail of the command (Extra command parameters.
5865: # $client - The socket open on the client that issued the request.
5866: # Returns:
5867: # 1 - Indicating processing should continue.
5868: #
5869: sub enrollment_enabled_handler {
5870: my ($cmd, $tail, $client) = @_;
5871: my $userinput = $cmd.":".$tail; # For logging purposes.
5872:
5873:
5874: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5875:
5876: my $outcome = &localenroll::run($cdom);
5877: &Reply($client, \$outcome, $userinput);
5878:
5879: return 1;
5880: }
5881: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5882:
5883: #
5884: # Validate an institutional code used for a LON-CAPA course.
5885: #
5886: # Formal Parameters:
5887: # $cmd - The command request that got us dispatched.
5888: # $tail - The tail of the command. In this case,
5889: # this is a colon separated set of words that will be split
5890: # into:
5891: # $dom - The domain for which the check of
5892: # institutional course code will occur.
5893: #
5894: # $instcode - The institutional code for the course
5895: # being requested, or validated for rights
5896: # to request.
5897: #
5898: # $owner - The course requestor (who will be the
5899: # course owner, in the form username:domain
5900: #
5901: # $client - Socket open on the client.
5902: # Returns:
5903: # 1 - Indicating processing should continue.
5904: #
5905: sub validate_instcode_handler {
5906: my ($cmd, $tail, $client) = @_;
5907: my $userinput = "$cmd:$tail";
5908: my ($dom,$instcode,$owner) = split(/:/, $tail);
5909: $instcode = &unescape($instcode);
5910: $owner = &unescape($owner);
5911: my ($outcome,$description,$credits) =
5912: &localenroll::validate_instcode($dom,$instcode,$owner);
5913: my $result = &escape($outcome).'&'.&escape($description).'&'.
5914: &escape($credits);
5915: &Reply($client, \$result, $userinput);
5916:
5917: return 1;
5918: }
5919: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5920:
5921: # Get the official sections for which auto-enrollment is possible.
5922: # Since the admin people won't know about 'unofficial sections'
5923: # we cannot auto-enroll on them.
5924: # Formal Parameters:
5925: # $cmd - The command request that got us dispatched here.
5926: # $tail - The remainder of the request. In our case this
5927: # will be split into:
5928: # $coursecode - The course name from the admin point of view.
5929: # $cdom - The course's domain(?).
5930: # $client - Socket open on the client.
5931: # Returns:
5932: # 1 - Indiciting processing should continue.
5933: #
5934: sub get_sections_handler {
5935: my ($cmd, $tail, $client) = @_;
5936: my $userinput = "$cmd:$tail";
5937:
5938: my ($coursecode, $cdom) = split(/:/, $tail);
5939: my @secs = &localenroll::get_sections($coursecode,$cdom);
5940: my $seclist = &escape(join(':',@secs));
5941:
5942: &Reply($client, \$seclist, $userinput);
5943:
5944:
5945: return 1;
5946: }
5947: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5948:
5949: # Validate the owner of a new course section.
5950: #
5951: # Formal Parameters:
5952: # $cmd - Command that got us dispatched.
5953: # $tail - the remainder of the command. For us this consists of a
5954: # colon separated string containing:
5955: # $inst - Course Id from the institutions point of view.
5956: # $owner - Proposed owner of the course.
5957: # $cdom - Domain of the course (from the institutions
5958: # point of view?)..
5959: # $client - Socket open on the client.
5960: #
5961: # Returns:
5962: # 1 - Processing should continue.
5963: #
5964: sub validate_course_owner_handler {
5965: my ($cmd, $tail, $client) = @_;
5966: my $userinput = "$cmd:$tail";
5967: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5968:
5969: $owner = &unescape($owner);
5970: $coowners = &unescape($coowners);
5971: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5972: &Reply($client, \$outcome, $userinput);
5973:
5974:
5975:
5976: return 1;
5977: }
5978: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5979:
5980: #
5981: # Validate a course section in the official schedule of classes
5982: # from the institutions point of view (part of autoenrollment).
5983: #
5984: # Formal Parameters:
5985: # $cmd - The command request that got us dispatched.
5986: # $tail - The tail of the command. In this case,
5987: # this is a colon separated set of words that will be split
5988: # into:
5989: # $inst_course_id - The course/section id from the
5990: # institutions point of view.
5991: # $cdom - The domain from the institutions
5992: # point of view.
5993: # $client - Socket open on the client.
5994: # Returns:
5995: # 1 - Indicating processing should continue.
5996: #
5997: sub validate_course_section_handler {
5998: my ($cmd, $tail, $client) = @_;
5999: my $userinput = "$cmd:$tail";
6000: my ($inst_course_id, $cdom) = split(/:/, $tail);
6001:
6002: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
6003: &Reply($client, \$outcome, $userinput);
6004:
6005:
6006: return 1;
6007: }
6008: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
6009:
6010: #
6011: # Validate course owner's access to enrollment data for specific class section.
6012: #
6013: #
6014: # Formal Parameters:
6015: # $cmd - The command request that got us dispatched.
6016: # $tail - The tail of the command. In this case this is a colon separated
6017: # set of values that will be split into:
6018: # $inst_class - Institutional code for the specific class section
6019: # $ownerlist - An escaped comma-separated list of username:domain
6020: # of the course owner, and co-owner(s).
6021: # $cdom - The domain of the course from the institution's
6022: # point of view.
6023: # $client - The socket open on the client.
6024: # Returns:
6025: # 1 - continue processing.
6026: #
6027:
6028: sub validate_class_access_handler {
6029: my ($cmd, $tail, $client) = @_;
6030: my $userinput = "$cmd:$tail";
6031: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
6032: my $owners = &unescape($ownerlist);
6033: my $outcome;
6034: eval {
6035: local($SIG{__DIE__})='DEFAULT';
6036: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
6037: };
6038: &Reply($client,\$outcome, $userinput);
6039:
6040: return 1;
6041: }
6042: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
6043:
6044: #
6045: # Validate course owner or co-owners(s) access to enrollment data for all sections
6046: # and crosslistings for a particular course.
6047: #
6048: #
6049: # Formal Parameters:
6050: # $cmd - The command request that got us dispatched.
6051: # $tail - The tail of the command. In this case this is a colon separated
6052: # set of values that will be split into:
6053: # $ownerlist - An escaped comma-separated list of username:domain
6054: # of the course owner, and co-owner(s).
6055: # $cdom - The domain of the course from the institution's
6056: # point of view.
6057: # $classes - Frozen hash of institutional course sections and
6058: # crosslistings.
6059: # $client - The socket open on the client.
6060: # Returns:
6061: # 1 - continue processing.
6062: #
6063:
6064: sub validate_classes_handler {
6065: my ($cmd, $tail, $client) = @_;
6066: my $userinput = "$cmd:$tail";
6067: my ($ownerlist,$cdom,$classes) = split(/:/, $tail);
6068: my $classesref = &Apache::lonnet::thaw_unescape($classes);
6069: my $owners = &unescape($ownerlist);
6070: my $result;
6071: eval {
6072: local($SIG{__DIE__})='DEFAULT';
6073: my %validations;
6074: my $response = &localenroll::check_instclasses($owners,$cdom,$classesref,
6075: \%validations);
6076: if ($response eq 'ok') {
6077: foreach my $key (keys(%validations)) {
6078: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
6079: }
6080: $result =~ s/\&$//;
6081: } else {
6082: $result = 'error';
6083: }
6084: };
6085: if (!$@) {
6086: &Reply($client, \$result, $userinput);
6087: } else {
6088: &Failure($client,"unknown_cmd\n",$userinput);
6089: }
6090: return 1;
6091: }
6092: ®ister_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0);
6093:
6094: #
6095: # Create a password for a new LON-CAPA user added by auto-enrollment.
6096: # Only used for case where authentication method for new user is localauth
6097: #
6098: # Formal Parameters:
6099: # $cmd - The command request that got us dispatched.
6100: # $tail - The tail of the command. In this case this is a colon separated
6101: # set of words that will be split into:
6102: # $authparam - An authentication parameter (localauth parameter).
6103: # $cdom - The domain of the course from the institution's
6104: # point of view.
6105: # $client - The socket open on the client.
6106: # Returns:
6107: # 1 - continue processing.
6108: #
6109: sub create_auto_enroll_password_handler {
6110: my ($cmd, $tail, $client) = @_;
6111: my $userinput = "$cmd:$tail";
6112:
6113: my ($authparam, $cdom) = split(/:/, $userinput);
6114:
6115: my ($create_passwd,$authchk);
6116: ($authparam,
6117: $create_passwd,
6118: $authchk) = &localenroll::create_password($authparam,$cdom);
6119:
6120: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
6121: $userinput);
6122:
6123:
6124: return 1;
6125: }
6126: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
6127: 0, 1, 0);
6128:
6129: sub auto_export_grades_handler {
6130: my ($cmd, $tail, $client) = @_;
6131: my $userinput = "$cmd:$tail";
6132: my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
6133: my $inforef = &Apache::lonnet::thaw_unescape($info);
6134: my $dataref = &Apache::lonnet::thaw_unescape($data);
6135: my ($outcome,$result);;
6136: eval {
6137: local($SIG{__DIE__})='DEFAULT';
6138: my %rtnhash;
6139: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
6140: if ($outcome eq 'ok') {
6141: foreach my $key (keys(%rtnhash)) {
6142: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
6143: }
6144: $result =~ s/\&$//;
6145: }
6146: };
6147: if (!$@) {
6148: if ($outcome eq 'ok') {
6149: if ($cipher) {
6150: my $cmdlength=length($result);
6151: $result.=" ";
6152: my $encresult='';
6153: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
6154: $encresult.= unpack("H16",
6155: $cipher->encrypt(substr($result,
6156: $encidx,
6157: 8)));
6158: }
6159: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
6160: } else {
6161: &Failure( $client, "error:no_key\n", $userinput);
6162: }
6163: } else {
6164: &Reply($client, "$outcome\n", $userinput);
6165: }
6166: } else {
6167: &Failure($client,"export_error\n",$userinput);
6168: }
6169: return 1;
6170: }
6171: ®ister_handler("autoexportgrades", \&auto_export_grades_handler,
6172: 1, 1, 0);
6173:
6174: # Retrieve and remove temporary files created by/during autoenrollment.
6175: #
6176: # Formal Parameters:
6177: # $cmd - The command that got us dispatched.
6178: # $tail - The tail of the command. In our case this is a colon
6179: # separated list that will be split into:
6180: # $filename - The name of the file to retrieve.
6181: # The filename is given as a path relative to
6182: # the LonCAPA temp file directory.
6183: # $client - Socket open on the client.
6184: #
6185: # Returns:
6186: # 1 - Continue processing.
6187: sub retrieve_auto_file_handler {
6188: my ($cmd, $tail, $client) = @_;
6189: my $userinput = "cmd:$tail";
6190:
6191: my ($filename) = split(/:/, $tail);
6192:
6193: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
6194:
6195: if ($filename =~m{/\.\./}) {
6196: &Failure($client, "refused\n", $userinput);
6197: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
6198: &Failure($client, "refused\n", $userinput);
6199: } elsif ( (-e $source) && ($filename ne '') ) {
6200: my $reply = '';
6201: if (open(my $fh,$source)) {
6202: while (<$fh>) {
6203: chomp($_);
6204: $_ =~ s/^\s+//g;
6205: $_ =~ s/\s+$//g;
6206: $reply .= $_;
6207: }
6208: close($fh);
6209: &Reply($client, &escape($reply)."\n", $userinput);
6210:
6211: # Does this have to be uncommented??!? (RF).
6212: #
6213: # unlink($source);
6214: } else {
6215: &Failure($client, "error\n", $userinput);
6216: }
6217: } else {
6218: &Failure($client, "error\n", $userinput);
6219: }
6220:
6221:
6222: return 1;
6223: }
6224: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
6225:
6226: sub crsreq_checks_handler {
6227: my ($cmd, $tail, $client) = @_;
6228: my $userinput = "$cmd:$tail";
6229: my $dom = $tail;
6230: my $result;
6231: my @reqtypes = ('official','unofficial','community','textbook','placement');
6232: eval {
6233: local($SIG{__DIE__})='DEFAULT';
6234: my %validations;
6235: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
6236: \%validations);
6237: if ($response eq 'ok') {
6238: foreach my $key (keys(%validations)) {
6239: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
6240: }
6241: $result =~ s/\&$//;
6242: } else {
6243: $result = 'error';
6244: }
6245: };
6246: if (!$@) {
6247: &Reply($client, \$result, $userinput);
6248: } else {
6249: &Failure($client,"unknown_cmd\n",$userinput);
6250: }
6251: return 1;
6252: }
6253: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
6254:
6255: sub validate_crsreq_handler {
6256: my ($cmd, $tail, $client) = @_;
6257: my $userinput = "$cmd:$tail";
6258: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
6259: $instcode = &unescape($instcode);
6260: $owner = &unescape($owner);
6261: $crstype = &unescape($crstype);
6262: $inststatuslist = &unescape($inststatuslist);
6263: $instcode = &unescape($instcode);
6264: $instseclist = &unescape($instseclist);
6265: my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
6266: my $outcome;
6267: eval {
6268: local($SIG{__DIE__})='DEFAULT';
6269: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
6270: $inststatuslist,$instcode,
6271: $instseclist,$custominfo);
6272: };
6273: if (!$@) {
6274: &Reply($client, \$outcome, $userinput);
6275: } else {
6276: &Failure($client,"unknown_cmd\n",$userinput);
6277: }
6278: return 1;
6279: }
6280: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
6281:
6282: sub crsreq_update_handler {
6283: my ($cmd, $tail, $client) = @_;
6284: my $userinput = "$cmd:$tail";
6285: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
6286: $accessstart,$accessend,$infohashref) =
6287: split(/:/, $tail);
6288: $crstype = &unescape($crstype);
6289: $action = &unescape($action);
6290: $ownername = &unescape($ownername);
6291: $ownerdomain = &unescape($ownerdomain);
6292: $fullname = &unescape($fullname);
6293: $title = &unescape($title);
6294: $code = &unescape($code);
6295: $accessstart = &unescape($accessstart);
6296: $accessend = &unescape($accessend);
6297: my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
6298: my ($result,$outcome);
6299: eval {
6300: local($SIG{__DIE__})='DEFAULT';
6301: my %rtnhash;
6302: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
6303: $ownername,$ownerdomain,$fullname,
6304: $title,$code,$accessstart,$accessend,
6305: $incoming,\%rtnhash);
6306: if ($outcome eq 'ok') {
6307: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
6308: foreach my $key (keys(%rtnhash)) {
6309: if (grep(/^\Q$key\E/,@posskeys)) {
6310: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
6311: }
6312: }
6313: $result =~ s/\&$//;
6314: }
6315: };
6316: if (!$@) {
6317: if ($outcome eq 'ok') {
6318: &Reply($client, \$result, $userinput);
6319: } else {
6320: &Reply($client, "format_error\n", $userinput);
6321: }
6322: } else {
6323: &Failure($client,"unknown_cmd\n",$userinput);
6324: }
6325: return 1;
6326: }
6327: ®ister_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
6328:
6329: #
6330: # Read and retrieve institutional code format (for support form).
6331: # Formal Parameters:
6332: # $cmd - Command that dispatched us.
6333: # $tail - Tail of the command. In this case it conatins
6334: # the course domain and the coursename.
6335: # $client - Socket open on the client.
6336: # Returns:
6337: # 1 - Continue processing.
6338: #
6339: sub get_institutional_code_format_handler {
6340: my ($cmd, $tail, $client) = @_;
6341: my $userinput = "$cmd:$tail";
6342:
6343: my $reply;
6344: my($cdom,$course) = split(/:/,$tail);
6345: my @pairs = split/\&/,$course;
6346: my %instcodes = ();
6347: my %codes = ();
6348: my @codetitles = ();
6349: my %cat_titles = ();
6350: my %cat_order = ();
6351: foreach (@pairs) {
6352: my ($key,$value) = split/=/,$_;
6353: $instcodes{&unescape($key)} = &unescape($value);
6354: }
6355: my $formatreply = &localenroll::instcode_format($cdom,
6356: \%instcodes,
6357: \%codes,
6358: \@codetitles,
6359: \%cat_titles,
6360: \%cat_order);
6361: if ($formatreply eq 'ok') {
6362: my $codes_str = &Apache::lonnet::hash2str(%codes);
6363: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
6364: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
6365: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
6366: &Reply($client,
6367: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
6368: .$cat_order_str."\n",
6369: $userinput);
6370: } else {
6371: # this else branch added by RF since if not ok, lonc will
6372: # hang waiting on reply until timeout.
6373: #
6374: &Reply($client, "format_error\n", $userinput);
6375: }
6376:
6377: return 1;
6378: }
6379: ®ister_handler("autoinstcodeformat",
6380: \&get_institutional_code_format_handler,0,1,0);
6381:
6382: sub get_institutional_defaults_handler {
6383: my ($cmd, $tail, $client) = @_;
6384: my $userinput = "$cmd:$tail";
6385:
6386: my $dom = $tail;
6387: my %defaults_hash;
6388: my @code_order;
6389: my $outcome;
6390: eval {
6391: local($SIG{__DIE__})='DEFAULT';
6392: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
6393: \@code_order);
6394: };
6395: if (!$@) {
6396: if ($outcome eq 'ok') {
6397: my $result='';
6398: while (my ($key,$value) = each(%defaults_hash)) {
6399: $result.=&escape($key).'='.&escape($value).'&';
6400: }
6401: $result .= 'code_order='.&escape(join('&',@code_order));
6402: &Reply($client,\$result,$userinput);
6403: } else {
6404: &Reply($client,"error\n", $userinput);
6405: }
6406: } else {
6407: &Failure($client,"unknown_cmd\n",$userinput);
6408: }
6409: }
6410: ®ister_handler("autoinstcodedefaults",
6411: \&get_institutional_defaults_handler,0,1,0);
6412:
6413: sub get_possible_instcodes_handler {
6414: my ($cmd, $tail, $client) = @_;
6415: my $userinput = "$cmd:$tail";
6416:
6417: my $reply;
6418: my $cdom = $tail;
6419: my (@codetitles,%cat_titles,%cat_order,@code_order);
6420: my $formatreply = &localenroll::possible_instcodes($cdom,
6421: \@codetitles,
6422: \%cat_titles,
6423: \%cat_order,
6424: \@code_order);
6425: if ($formatreply eq 'ok') {
6426: my $result = join('&',map {&escape($_);} (@codetitles)).':';
6427: $result .= join('&',map {&escape($_);} (@code_order)).':';
6428: foreach my $key (keys(%cat_titles)) {
6429: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
6430: }
6431: $result =~ s/\&$//;
6432: $result .= ':';
6433: foreach my $key (keys(%cat_order)) {
6434: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
6435: }
6436: $result =~ s/\&$//;
6437: &Reply($client,\$result,$userinput);
6438: } else {
6439: &Reply($client, "format_error\n", $userinput);
6440: }
6441: return 1;
6442: }
6443: ®ister_handler("autopossibleinstcodes",
6444: \&get_possible_instcodes_handler,0,1,0);
6445:
6446: sub get_institutional_user_rules {
6447: my ($cmd, $tail, $client) = @_;
6448: my $userinput = "$cmd:$tail";
6449: my $dom = &unescape($tail);
6450: my (%rules_hash,@rules_order);
6451: my $outcome;
6452: eval {
6453: local($SIG{__DIE__})='DEFAULT';
6454: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
6455: };
6456: if (!$@) {
6457: if ($outcome eq 'ok') {
6458: my $result;
6459: foreach my $key (keys(%rules_hash)) {
6460: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6461: }
6462: $result =~ s/\&$//;
6463: $result .= ':';
6464: if (@rules_order > 0) {
6465: foreach my $item (@rules_order) {
6466: $result .= &escape($item).'&';
6467: }
6468: }
6469: $result =~ s/\&$//;
6470: &Reply($client,\$result,$userinput);
6471: } else {
6472: &Reply($client,"error\n", $userinput);
6473: }
6474: } else {
6475: &Failure($client,"unknown_cmd\n",$userinput);
6476: }
6477: }
6478: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
6479:
6480: sub get_institutional_id_rules {
6481: my ($cmd, $tail, $client) = @_;
6482: my $userinput = "$cmd:$tail";
6483: my $dom = &unescape($tail);
6484: my (%rules_hash,@rules_order);
6485: my $outcome;
6486: eval {
6487: local($SIG{__DIE__})='DEFAULT';
6488: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
6489: };
6490: if (!$@) {
6491: if ($outcome eq 'ok') {
6492: my $result;
6493: foreach my $key (keys(%rules_hash)) {
6494: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6495: }
6496: $result =~ s/\&$//;
6497: $result .= ':';
6498: if (@rules_order > 0) {
6499: foreach my $item (@rules_order) {
6500: $result .= &escape($item).'&';
6501: }
6502: }
6503: $result =~ s/\&$//;
6504: &Reply($client,\$result,$userinput);
6505: } else {
6506: &Reply($client,"error\n", $userinput);
6507: }
6508: } else {
6509: &Failure($client,"unknown_cmd\n",$userinput);
6510: }
6511: }
6512: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
6513:
6514: sub get_institutional_selfcreate_rules {
6515: my ($cmd, $tail, $client) = @_;
6516: my $userinput = "$cmd:$tail";
6517: my $dom = &unescape($tail);
6518: my (%rules_hash,@rules_order);
6519: my $outcome;
6520: eval {
6521: local($SIG{__DIE__})='DEFAULT';
6522: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
6523: };
6524: if (!$@) {
6525: if ($outcome eq 'ok') {
6526: my $result;
6527: foreach my $key (keys(%rules_hash)) {
6528: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6529: }
6530: $result =~ s/\&$//;
6531: $result .= ':';
6532: if (@rules_order > 0) {
6533: foreach my $item (@rules_order) {
6534: $result .= &escape($item).'&';
6535: }
6536: }
6537: $result =~ s/\&$//;
6538: &Reply($client,\$result,$userinput);
6539: } else {
6540: &Reply($client,"error\n", $userinput);
6541: }
6542: } else {
6543: &Failure($client,"unknown_cmd\n",$userinput);
6544: }
6545: }
6546: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
6547:
6548:
6549: sub institutional_username_check {
6550: my ($cmd, $tail, $client) = @_;
6551: my $userinput = "$cmd:$tail";
6552: my %rulecheck;
6553: my $outcome;
6554: my ($udom,$uname,@rules) = split(/:/,$tail);
6555: $udom = &unescape($udom);
6556: $uname = &unescape($uname);
6557: @rules = map {&unescape($_);} (@rules);
6558: eval {
6559: local($SIG{__DIE__})='DEFAULT';
6560: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
6561: };
6562: if (!$@) {
6563: if ($outcome eq 'ok') {
6564: my $result='';
6565: foreach my $key (keys(%rulecheck)) {
6566: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6567: }
6568: &Reply($client,\$result,$userinput);
6569: } else {
6570: &Reply($client,"error\n", $userinput);
6571: }
6572: } else {
6573: &Failure($client,"unknown_cmd\n",$userinput);
6574: }
6575: }
6576: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
6577:
6578: sub institutional_id_check {
6579: my ($cmd, $tail, $client) = @_;
6580: my $userinput = "$cmd:$tail";
6581: my %rulecheck;
6582: my $outcome;
6583: my ($udom,$id,@rules) = split(/:/,$tail);
6584: $udom = &unescape($udom);
6585: $id = &unescape($id);
6586: @rules = map {&unescape($_);} (@rules);
6587: eval {
6588: local($SIG{__DIE__})='DEFAULT';
6589: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
6590: };
6591: if (!$@) {
6592: if ($outcome eq 'ok') {
6593: my $result='';
6594: foreach my $key (keys(%rulecheck)) {
6595: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6596: }
6597: &Reply($client,\$result,$userinput);
6598: } else {
6599: &Reply($client,"error\n", $userinput);
6600: }
6601: } else {
6602: &Failure($client,"unknown_cmd\n",$userinput);
6603: }
6604: }
6605: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
6606:
6607: sub institutional_selfcreate_check {
6608: my ($cmd, $tail, $client) = @_;
6609: my $userinput = "$cmd:$tail";
6610: my %rulecheck;
6611: my $outcome;
6612: my ($udom,$email,@rules) = split(/:/,$tail);
6613: $udom = &unescape($udom);
6614: $email = &unescape($email);
6615: @rules = map {&unescape($_);} (@rules);
6616: eval {
6617: local($SIG{__DIE__})='DEFAULT';
6618: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
6619: };
6620: if (!$@) {
6621: if ($outcome eq 'ok') {
6622: my $result='';
6623: foreach my $key (keys(%rulecheck)) {
6624: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6625: }
6626: &Reply($client,\$result,$userinput);
6627: } else {
6628: &Reply($client,"error\n", $userinput);
6629: }
6630: } else {
6631: &Failure($client,"unknown_cmd\n",$userinput);
6632: }
6633: }
6634: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
6635:
6636: # Get domain specific conditions for import of student photographs to a course
6637: #
6638: # Retrieves information from photo_permission subroutine in localenroll.
6639: # Returns outcome (ok) if no processing errors, and whether course owner is
6640: # required to accept conditions of use (yes/no).
6641: #
6642: #
6643: sub photo_permission_handler {
6644: my ($cmd, $tail, $client) = @_;
6645: my $userinput = "$cmd:$tail";
6646: my $cdom = $tail;
6647: my ($perm_reqd,$conditions);
6648: my $outcome;
6649: eval {
6650: local($SIG{__DIE__})='DEFAULT';
6651: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
6652: \$conditions);
6653: };
6654: if (!$@) {
6655: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
6656: $userinput);
6657: } else {
6658: &Failure($client,"unknown_cmd\n",$userinput);
6659: }
6660: return 1;
6661: }
6662: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
6663:
6664: #
6665: # Checks if student photo is available for a user in the domain, in the user's
6666: # directory (in /userfiles/internal/studentphoto.jpg).
6667: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
6668: # the student's photo.
6669:
6670: sub photo_check_handler {
6671: my ($cmd, $tail, $client) = @_;
6672: my $userinput = "$cmd:$tail";
6673: my ($udom,$uname,$pid) = split(/:/,$tail);
6674: $udom = &unescape($udom);
6675: $uname = &unescape($uname);
6676: $pid = &unescape($pid);
6677: my $path=&propath($udom,$uname).'/userfiles/internal/';
6678: if (!-e $path) {
6679: &mkpath($path);
6680: }
6681: my $response;
6682: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
6683: $result .= ':'.$response;
6684: &Reply($client, &escape($result)."\n",$userinput);
6685: return 1;
6686: }
6687: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
6688:
6689: #
6690: # Retrieve information from localenroll about whether to provide a button
6691: # for users who have enbled import of student photos to initiate an
6692: # update of photo files for registered students. Also include
6693: # comment to display alongside button.
6694:
6695: sub photo_choice_handler {
6696: my ($cmd, $tail, $client) = @_;
6697: my $userinput = "$cmd:$tail";
6698: my $cdom = &unescape($tail);
6699: my ($update,$comment);
6700: eval {
6701: local($SIG{__DIE__})='DEFAULT';
6702: ($update,$comment) = &localenroll::manager_photo_update($cdom);
6703: };
6704: if (!$@) {
6705: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
6706: } else {
6707: &Failure($client,"unknown_cmd\n",$userinput);
6708: }
6709: return 1;
6710: }
6711: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
6712:
6713: #
6714: # Gets a student's photo to exist (in the correct image type) in the user's
6715: # directory.
6716: # Formal Parameters:
6717: # $cmd - The command request that got us dispatched.
6718: # $tail - A colon separated set of words that will be split into:
6719: # $domain - student's domain
6720: # $uname - student username
6721: # $type - image type desired
6722: # $client - The socket open on the client.
6723: # Returns:
6724: # 1 - continue processing.
6725:
6726: sub student_photo_handler {
6727: my ($cmd, $tail, $client) = @_;
6728: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
6729:
6730: my $path=&propath($domain,$uname). '/userfiles/internal/';
6731: my $filename = 'studentphoto.'.$ext;
6732: if ($type eq 'thumbnail') {
6733: $filename = 'studentphoto_tn.'.$ext;
6734: }
6735: if (-e $path.$filename) {
6736: &Reply($client,"ok\n","$cmd:$tail");
6737: return 1;
6738: }
6739: &mkpath($path);
6740: my $file;
6741: if ($type eq 'thumbnail') {
6742: eval {
6743: local($SIG{__DIE__})='DEFAULT';
6744: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
6745: };
6746: } else {
6747: $file=&localstudentphoto::fetch($domain,$uname);
6748: }
6749: if (!$file) {
6750: &Failure($client,"unavailable\n","$cmd:$tail");
6751: return 1;
6752: }
6753: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
6754: if (-e $path.$filename) {
6755: &Reply($client,"ok\n","$cmd:$tail");
6756: return 1;
6757: }
6758: &Failure($client,"unable_to_convert\n","$cmd:$tail");
6759: return 1;
6760: }
6761: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
6762:
6763: sub inst_usertypes_handler {
6764: my ($cmd, $domain, $client) = @_;
6765: my $res;
6766: my $userinput = $cmd.":".$domain; # For logging purposes.
6767: my (%typeshash,@order,$result);
6768: eval {
6769: local($SIG{__DIE__})='DEFAULT';
6770: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
6771: };
6772: if ($result eq 'ok') {
6773: if (keys(%typeshash) > 0) {
6774: foreach my $key (keys(%typeshash)) {
6775: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
6776: }
6777: }
6778: $res=~s/\&$//;
6779: $res .= ':';
6780: if (@order > 0) {
6781: foreach my $item (@order) {
6782: $res .= &escape($item).'&';
6783: }
6784: }
6785: $res=~s/\&$//;
6786: }
6787: &Reply($client, \$res, $userinput);
6788: return 1;
6789: }
6790: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
6791:
6792: # mkpath makes all directories for a file, expects an absolute path with a
6793: # file or a trailing / if just a dir is passed
6794: # returns 1 on success 0 on failure
6795: sub mkpath {
6796: my ($file)=@_;
6797: my @parts=split(/\//,$file,-1);
6798: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
6799: for (my $i=3;$i<= ($#parts-1);$i++) {
6800: $now.='/'.$parts[$i];
6801: if (!-e $now) {
6802: if (!mkdir($now,0770)) { return 0; }
6803: }
6804: }
6805: return 1;
6806: }
6807:
6808: #---------------------------------------------------------------
6809: #
6810: # Getting, decoding and dispatching requests:
6811: #
6812: #
6813: # Get a Request:
6814: # Gets a Request message from the client. The transaction
6815: # is defined as a 'line' of text. We remove the new line
6816: # from the text line.
6817: #
6818: sub get_request {
6819: my $input = <$client>;
6820: chomp($input);
6821:
6822: &Debug("get_request: Request = $input\n");
6823:
6824: &status('Processing '.$clientname.':'.$input);
6825:
6826: return $input;
6827: }
6828: #---------------------------------------------------------------
6829: #
6830: # Process a request. This sub should shrink as each action
6831: # gets farmed out into a separat sub that is registered
6832: # with the dispatch hash.
6833: #
6834: # Parameters:
6835: # user_input - The request received from the client (lonc).
6836: #
6837: # Returns:
6838: # true to keep processing, false if caller should exit.
6839: #
6840: sub process_request {
6841: my ($userinput) = @_; # Easier for now to break style than to
6842: # fix all the userinput -> user_input.
6843: my $wasenc = 0; # True if request was encrypted.
6844: # ------------------------------------------------------------ See if encrypted
6845: # for command
6846: # sethost:<server>
6847: # <command>:<args>
6848: # we just send it to the processor
6849: # for
6850: # sethost:<server>:<command>:<args>
6851: # we do the implict set host and then do the command
6852: if ($userinput =~ /^sethost:/) {
6853: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
6854: if (defined($userinput)) {
6855: &sethost("$cmd:$newid");
6856: } else {
6857: $userinput = "$cmd:$newid";
6858: }
6859: }
6860:
6861: if ($userinput =~ /^enc/) {
6862: $userinput = decipher($userinput);
6863: $wasenc=1;
6864: if(!$userinput) { # Cipher not defined.
6865: &Failure($client, "error: Encrypted data without negotated key\n");
6866: return 0;
6867: }
6868: }
6869: Debug("process_request: $userinput\n");
6870:
6871: #
6872: # The 'correct way' to add a command to lond is now to
6873: # write a sub to execute it and Add it to the command dispatch
6874: # hash via a call to register_handler.. The comments to that
6875: # sub should give you enough to go on to show how to do this
6876: # along with the examples that are building up as this code
6877: # is getting refactored. Until all branches of the
6878: # if/elseif monster below have been factored out into
6879: # separate procesor subs, if the dispatch hash is missing
6880: # the command keyword, we will fall through to the remainder
6881: # of the if/else chain below in order to keep this thing in
6882: # working order throughout the transmogrification.
6883:
6884: my ($command, $tail) = split(/:/, $userinput, 2);
6885: chomp($command);
6886: chomp($tail);
6887: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
6888: $command =~ s/(\r)//; # And this too for parameterless commands.
6889: if(!$tail) {
6890: $tail =""; # defined but blank.
6891: }
6892:
6893: &Debug("Command received: $command, encoded = $wasenc");
6894:
6895: if(defined $Dispatcher{$command}) {
6896:
6897: my $dispatch_info = $Dispatcher{$command};
6898: my $handler = $$dispatch_info[0];
6899: my $need_encode = $$dispatch_info[1];
6900: my $client_types = $$dispatch_info[2];
6901: Debug("Matched dispatch hash: mustencode: $need_encode "
6902: ."ClientType $client_types");
6903:
6904: # Validate the request:
6905:
6906: my $ok = 1;
6907: my $requesterprivs = 0;
6908: if(&isClient()) {
6909: $requesterprivs |= $CLIENT_OK;
6910: }
6911: if(&isManager()) {
6912: $requesterprivs |= $MANAGER_OK;
6913: }
6914: if($need_encode && (!$wasenc)) {
6915: Debug("Must encode but wasn't: $need_encode $wasenc");
6916: $ok = 0;
6917: }
6918: if(($client_types & $requesterprivs) == 0) {
6919: Debug("Client not privileged to do this operation");
6920: $ok = 0;
6921: }
6922: if ($ok) {
6923: my $realcommand = $command;
6924: if ($command eq 'querysend') {
6925: my ($query,$rest)=split(/\:/,$tail,2);
6926: $query=~s/\n*$//g;
6927: my @possqueries =
6928: qw(userlog courselog fetchenrollment institutionalphotos usersearch instdirsearch getinstuser getmultinstusers);
6929: if (grep(/^\Q$query\E$/,@possqueries)) {
6930: $command .= '_'.$query;
6931: } elsif ($query eq 'prepare activity log') {
6932: $command .= '_activitylog';
6933: }
6934: }
6935: if (ref($trust{$command}) eq 'HASH') {
6936: my $donechecks;
6937: if ($trust{$command}{'anywhere'}) {
6938: $donechecks = 1;
6939: } elsif ($trust{$command}{'manageronly'}) {
6940: unless (&isManager()) {
6941: $ok = 0;
6942: }
6943: $donechecks = 1;
6944: } elsif ($trust{$command}{'institutiononly'}) {
6945: unless ($clientsameinst) {
6946: $ok = 0;
6947: }
6948: $donechecks = 1;
6949: } elsif ($clientsameinst) {
6950: $donechecks = 1;
6951: }
6952: unless ($donechecks) {
6953: foreach my $rule (keys(%{$trust{$command}})) {
6954: next if ($rule eq 'remote');
6955: if ($trust{$command}{$rule}) {
6956: if ($clientprohibited{$rule}) {
6957: $ok = 0;
6958: } else {
6959: $ok = 1;
6960: $donechecks = 1;
6961: last;
6962: }
6963: }
6964: }
6965: }
6966: unless ($donechecks) {
6967: if ($trust{$command}{'remote'}) {
6968: if ($clientremoteok) {
6969: $ok = 1;
6970: } else {
6971: $ok = 0;
6972: }
6973: }
6974: }
6975: }
6976: $command = $realcommand;
6977: }
6978:
6979: if($ok) {
6980: Debug("Dispatching to handler $command $tail");
6981: my $keep_going = &$handler($command, $tail, $client);
6982: return $keep_going;
6983: } else {
6984: Debug("Refusing to dispatch because client did not match requirements");
6985: Failure($client, "refused\n", $userinput);
6986: return 1;
6987: }
6988: }
6989:
6990: print $client "unknown_cmd\n";
6991: # -------------------------------------------------------------------- complete
6992: Debug("process_request - returning 1");
6993: return 1;
6994: }
6995: #
6996: # Decipher encoded traffic
6997: # Parameters:
6998: # input - Encoded data.
6999: # Returns:
7000: # Decoded data or undef if encryption key was not yet negotiated.
7001: # Implicit input:
7002: # cipher - This global holds the negotiated encryption key.
7003: #
7004: sub decipher {
7005: my ($input) = @_;
7006: my $output = '';
7007:
7008:
7009: if($cipher) {
7010: my($enc, $enclength, $encinput) = split(/:/, $input);
7011: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
7012: $output .=
7013: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
7014: }
7015: return substr($output, 0, $enclength);
7016: } else {
7017: return undef;
7018: }
7019: }
7020:
7021: #
7022: # Register a command processor. This function is invoked to register a sub
7023: # to process a request. Once registered, the ProcessRequest sub can automatically
7024: # dispatch requests to an appropriate sub, and do the top level validity checking
7025: # as well:
7026: # - Is the keyword recognized.
7027: # - Is the proper client type attempting the request.
7028: # - Is the request encrypted if it has to be.
7029: # Parameters:
7030: # $request_name - Name of the request being registered.
7031: # This is the command request that will match
7032: # against the hash keywords to lookup the information
7033: # associated with the dispatch information.
7034: # $procedure - Reference to a sub to call to process the request.
7035: # All subs get called as follows:
7036: # Procedure($cmd, $tail, $replyfd, $key)
7037: # $cmd - the actual keyword that invoked us.
7038: # $tail - the tail of the request that invoked us.
7039: # $replyfd- File descriptor connected to the client
7040: # $must_encode - True if the request must be encoded to be good.
7041: # $client_ok - True if it's ok for a client to request this.
7042: # $manager_ok - True if it's ok for a manager to request this.
7043: # Side effects:
7044: # - On success, the Dispatcher hash has an entry added for the key $RequestName
7045: # - On failure, the program will die as it's a bad internal bug to try to
7046: # register a duplicate command handler.
7047: #
7048: sub register_handler {
7049: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
7050:
7051: # Don't allow duplication#
7052:
7053: if (defined $Dispatcher{$request_name}) {
7054: die "Attempting to define a duplicate request handler for $request_name\n";
7055: }
7056: # Build the client type mask:
7057:
7058: my $client_type_mask = 0;
7059: if($client_ok) {
7060: $client_type_mask |= $CLIENT_OK;
7061: }
7062: if($manager_ok) {
7063: $client_type_mask |= $MANAGER_OK;
7064: }
7065:
7066: # Enter the hash:
7067:
7068: my @entry = ($procedure, $must_encode, $client_type_mask);
7069:
7070: $Dispatcher{$request_name} = \@entry;
7071:
7072: }
7073:
7074:
7075: #------------------------------------------------------------------
7076:
7077:
7078:
7079:
7080: #
7081: # Convert an error return code from lcpasswd to a string value.
7082: #
7083: sub lcpasswdstrerror {
7084: my $ErrorCode = shift;
7085: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
7086: return "lcpasswd Unrecognized error return value ".$ErrorCode;
7087: } else {
7088: return $passwderrors[$ErrorCode];
7089: }
7090: }
7091:
7092: # grabs exception and records it to log before exiting
7093: sub catchexception {
7094: my ($error)=@_;
7095: $SIG{'QUIT'}='DEFAULT';
7096: $SIG{__DIE__}='DEFAULT';
7097: &status("Catching exception");
7098: &logthis("<font color='red'>CRITICAL: "
7099: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
7100: ."a crash with this error msg->[$error]</font>");
7101: &logthis('Famous last words: '.$status.' - '.$lastlog);
7102: if ($client) { print $client "error: $error\n"; }
7103: $server->close();
7104: die($error);
7105: }
7106: sub timeout {
7107: &status("Handling Timeout");
7108: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
7109: &catchexception('Timeout');
7110: }
7111: # -------------------------------- Set signal handlers to record abnormal exits
7112:
7113:
7114: $SIG{'QUIT'}=\&catchexception;
7115: $SIG{__DIE__}=\&catchexception;
7116:
7117: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
7118: &status("Read loncapa.conf and loncapa_apache.conf");
7119: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
7120: %perlvar=%{$perlvarref};
7121: undef $perlvarref;
7122:
7123: # ----------------------------- Make sure this process is running from user=www
7124: my $wwwid=getpwnam('www');
7125: if ($wwwid!=$<) {
7126: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
7127: my $subj="LON: $currenthostid User ID mismatch";
7128: system("echo 'User ID mismatch. lond must be run as user www.' |".
7129: " mail -s '$subj' $emailto > /dev/null");
7130: exit 1;
7131: }
7132:
7133: # --------------------------------------------- Check if other instance running
7134:
7135: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
7136:
7137: if (-e $pidfile) {
7138: my $lfh=IO::File->new("$pidfile");
7139: my $pide=<$lfh>;
7140: chomp($pide);
7141: if (kill 0 => $pide) { die "already running"; }
7142: }
7143:
7144: # ------------------------------------------------------------- Read hosts file
7145:
7146:
7147:
7148: # establish SERVER socket, bind and listen.
7149: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
7150: Type => SOCK_STREAM,
7151: Proto => 'tcp',
7152: ReuseAddr => 1,
7153: Listen => 10 )
7154: or die "making socket: $@\n";
7155:
7156: # --------------------------------------------------------- Do global variables
7157:
7158: # global variables
7159:
7160: my %children = (); # keys are current child process IDs
7161:
7162: sub REAPER { # takes care of dead children
7163: $SIG{CHLD} = \&REAPER;
7164: &status("Handling child death");
7165: my $pid;
7166: do {
7167: $pid = waitpid(-1,&WNOHANG());
7168: if (defined($children{$pid})) {
7169: &logthis("Child $pid died");
7170: delete($children{$pid});
7171: } elsif ($pid > 0) {
7172: &logthis("Unknown Child $pid died");
7173: }
7174: } while ( $pid > 0 );
7175: foreach my $child (keys(%children)) {
7176: $pid = waitpid($child,&WNOHANG());
7177: if ($pid > 0) {
7178: &logthis("Child $child - $pid looks like we missed it's death");
7179: delete($children{$pid});
7180: }
7181: }
7182: &status("Finished Handling child death");
7183: }
7184:
7185: sub HUNTSMAN { # signal handler for SIGINT
7186: &status("Killing children (INT)");
7187: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
7188: kill 'INT' => keys %children;
7189: &logthis("Free socket: ".shutdown($server,2)); # free up socket
7190: my $execdir=$perlvar{'lonDaemons'};
7191: unlink("$execdir/logs/lond.pid");
7192: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
7193: &status("Done killing children");
7194: exit; # clean up with dignity
7195: }
7196:
7197: sub HUPSMAN { # signal handler for SIGHUP
7198: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
7199: &status("Killing children for restart (HUP)");
7200: kill 'INT' => keys %children;
7201: &logthis("Free socket: ".shutdown($server,2)); # free up socket
7202: &logthis("<font color='red'>CRITICAL: Restarting</font>");
7203: my $execdir=$perlvar{'lonDaemons'};
7204: unlink("$execdir/logs/lond.pid");
7205: &status("Restarting self (HUP)");
7206: exec("$execdir/lond"); # here we go again
7207: }
7208:
7209: #
7210: # Reload the Apache daemon's state.
7211: # This is done by invoking /home/httpd/perl/apachereload
7212: # a setuid perl script that can be root for us to do this job.
7213: #
7214: sub ReloadApache {
7215: # --------------------------- Handle case of another apachereload process (locking)
7216: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
7217: my $execdir = $perlvar{'lonDaemons'};
7218: my $script = $execdir."/apachereload";
7219: system($script);
7220: unlink('/tmp/lock_apachereload'); # Remove the lock file.
7221: }
7222: }
7223:
7224: #
7225: # Called in response to a USR2 signal.
7226: # - Reread hosts.tab
7227: # - All children connected to hosts that were removed from hosts.tab
7228: # are killed via SIGINT
7229: # - All children connected to previously existing hosts are sent SIGUSR1
7230: # - Our internal hosts hash is updated to reflect the new contents of
7231: # hosts.tab causing connections from hosts added to hosts.tab to
7232: # now be honored.
7233: #
7234: sub UpdateHosts {
7235: &status("Reload hosts.tab");
7236: logthis('<font color="blue"> Updating connections </font>');
7237: #
7238: # The %children hash has the set of IP's we currently have children
7239: # on. These need to be matched against records in the hosts.tab
7240: # Any ip's no longer in the table get killed off they correspond to
7241: # either dropped or changed hosts. Note that the re-read of the table
7242: # will take care of new and changed hosts as connections come into being.
7243:
7244: &Apache::lonnet::reset_hosts_info();
7245: my %active;
7246:
7247: foreach my $child (keys(%children)) {
7248: my $childip = $children{$child};
7249: if ($childip ne '127.0.0.1'
7250: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
7251: logthis('<font color="blue"> UpdateHosts killing child '
7252: ." $child for ip $childip </font>");
7253: kill('INT', $child);
7254: } else {
7255: $active{$child} = $childip;
7256: logthis('<font color="green"> keeping child for ip '
7257: ." $childip (pid=$child) </font>");
7258: }
7259: }
7260:
7261: my %oldconf = %secureconf;
7262: my %connchange;
7263: if (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') {
7264: logthis('<font color="blue"> Reloaded SSL connection rules and cleared CRL checking history </font>');
7265: } else {
7266: logthis('<font color="yellow"> Failed to reload SSL connection rules and clear CRL checking history </font>');
7267: }
7268: if ((ref($oldconf{'connfrom'}) eq 'HASH') && (ref($secureconf{'connfrom'}) eq 'HASH')) {
7269: foreach my $type ('dom','intdom','other') {
7270: if ((($oldconf{'connfrom'}{$type} eq 'no') && ($secureconf{'connfrom'}{$type} eq 'req')) ||
7271: (($oldconf{'connfrom'}{$type} eq 'req') && ($secureconf{'connfrom'}{$type} eq 'no'))) {
7272: $connchange{$type} = 1;
7273: }
7274: }
7275: }
7276: if (keys(%connchange)) {
7277: foreach my $child (keys(%active)) {
7278: my $childip = $active{$child};
7279: if ($childip ne '127.0.0.1') {
7280: my $childhostname = gethostbyaddr(Socket::inet_aton($childip),AF_INET);
7281: if ($childhostname ne '') {
7282: my $childlonhost = &Apache::lonnet::get_server_homeID($childhostname);
7283: my ($samedom,$sameinst) = &set_client_info($childlonhost);
7284: if ($samedom) {
7285: if ($connchange{'dom'}) {
7286: logthis('<font color="blue"> UpdateHosts killing child '
7287: ." $child for ip $childip </font>");
7288: kill('INT', $child);
7289: }
7290: } elsif ($sameinst) {
7291: if ($connchange{'intdom'}) {
7292: logthis('<font color="blue"> UpdateHosts killing child '
7293: ." $child for ip $childip </font>");
7294: kill('INT', $child);
7295: }
7296: } else {
7297: if ($connchange{'other'}) {
7298: logthis('<font color="blue"> UpdateHosts killing child '
7299: ." $child for ip $childip </font>");
7300: kill('INT', $child);
7301: }
7302: }
7303: }
7304: }
7305: }
7306: }
7307: ReloadApache;
7308: &status("Finished reloading hosts.tab");
7309: }
7310:
7311: sub checkchildren {
7312: &status("Checking on the children (sending signals)");
7313: &initnewstatus();
7314: &logstatus();
7315: &logthis('Going to check on the children');
7316: my $docdir=$perlvar{'lonDocRoot'};
7317: foreach (sort keys %children) {
7318: #sleep 1;
7319: unless (kill 'USR1' => $_) {
7320: &logthis ('Child '.$_.' is dead');
7321: &logstatus($$.' is dead');
7322: delete($children{$_});
7323: }
7324: }
7325: sleep 5;
7326: $SIG{ALRM} = sub { Debug("timeout");
7327: die "timeout"; };
7328: $SIG{__DIE__} = 'DEFAULT';
7329: &status("Checking on the children (waiting for reports)");
7330: foreach (sort keys %children) {
7331: unless (-e "$docdir/lon-status/londchld/$_.txt") {
7332: eval {
7333: alarm(300);
7334: &logthis('Child '.$_.' did not respond');
7335: kill 9 => $_;
7336: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
7337: #$subj="LON: $currenthostid killed lond process $_";
7338: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
7339: #$execdir=$perlvar{'lonDaemons'};
7340: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
7341: delete($children{$_});
7342: alarm(0);
7343: }
7344: }
7345: }
7346: $SIG{ALRM} = 'DEFAULT';
7347: $SIG{__DIE__} = \&catchexception;
7348: &status("Finished checking children");
7349: &logthis('Finished Checking children');
7350: }
7351:
7352: # --------------------------------------------------------------------- Logging
7353:
7354: sub logthis {
7355: my $message=shift;
7356: my $execdir=$perlvar{'lonDaemons'};
7357: my $fh=IO::File->new(">>$execdir/logs/lond.log");
7358: my $now=time;
7359: my $local=localtime($now);
7360: $lastlog=$local.': '.$message;
7361: print $fh "$local ($$): $message\n";
7362: }
7363:
7364: # ------------------------- Conditional log if $DEBUG true.
7365: sub Debug {
7366: my $message = shift;
7367: if($DEBUG) {
7368: &logthis($message);
7369: }
7370: }
7371:
7372: #
7373: # Sub to do replies to client.. this gives a hook for some
7374: # debug tracing too:
7375: # Parameters:
7376: # fd - File open on client.
7377: # reply - Text to send to client.
7378: # request - Original request from client.
7379: #
7380: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
7381: #this is done automatically ($$reply must not contain any \n in this case).
7382: #If $reply is a string the caller has to ensure this.
7383: sub Reply {
7384: my ($fd, $reply, $request) = @_;
7385: if (ref($reply)) {
7386: print $fd $$reply;
7387: print $fd "\n";
7388: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
7389: } else {
7390: print $fd $reply;
7391: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
7392: }
7393: $Transactions++;
7394: }
7395:
7396:
7397: #
7398: # Sub to report a failure.
7399: # This function:
7400: # - Increments the failure statistic counters.
7401: # - Invokes Reply to send the error message to the client.
7402: # Parameters:
7403: # fd - File descriptor open on the client
7404: # reply - Reply text to emit.
7405: # request - The original request message (used by Reply
7406: # to debug if that's enabled.
7407: # Implicit outputs:
7408: # $Failures- The number of failures is incremented.
7409: # Reply (invoked here) sends a message to the
7410: # client:
7411: #
7412: sub Failure {
7413: my $fd = shift;
7414: my $reply = shift;
7415: my $request = shift;
7416:
7417: $Failures++;
7418: Reply($fd, $reply, $request); # That's simple eh?
7419: }
7420: # ------------------------------------------------------------------ Log status
7421:
7422: sub logstatus {
7423: &status("Doing logging");
7424: my $docdir=$perlvar{'lonDocRoot'};
7425: {
7426: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
7427: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
7428: $fh->close();
7429: }
7430: &status("Finished $$.txt");
7431: {
7432: open(LOG,">>$docdir/lon-status/londstatus.txt");
7433: flock(LOG,LOCK_EX);
7434: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
7435: .$status."\t".$lastlog."\t $keymode\n";
7436: flock(LOG,LOCK_UN);
7437: close(LOG);
7438: }
7439: &status("Finished logging");
7440: }
7441:
7442: sub initnewstatus {
7443: my $docdir=$perlvar{'lonDocRoot'};
7444: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
7445: my $now=time();
7446: my $local=localtime($now);
7447: print $fh "LOND status $local - parent $$\n\n";
7448: opendir(DIR,"$docdir/lon-status/londchld");
7449: while (my $filename=readdir(DIR)) {
7450: unlink("$docdir/lon-status/londchld/$filename");
7451: }
7452: closedir(DIR);
7453: }
7454:
7455: # -------------------------------------------------------------- Status setting
7456:
7457: sub status {
7458: my $what=shift;
7459: my $now=time;
7460: my $local=localtime($now);
7461: $status=$local.': '.$what;
7462: $0='lond: '.$what.' '.$local;
7463: }
7464:
7465: # -------------------------------------------------------------- Talk to lonsql
7466:
7467: sub sql_reply {
7468: my ($cmd)=@_;
7469: my $answer=&sub_sql_reply($cmd);
7470: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
7471: return $answer;
7472: }
7473:
7474: sub sub_sql_reply {
7475: my ($cmd)=@_;
7476: my $unixsock="mysqlsock";
7477: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
7478: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
7479: Type => SOCK_STREAM,
7480: Timeout => 10)
7481: or return "con_lost";
7482: print $sclient "$cmd:$currentdomainid\n";
7483: my $answer=<$sclient>;
7484: chomp($answer);
7485: if (!$answer) { $answer="con_lost"; }
7486: return $answer;
7487: }
7488:
7489: # --------------------------------------- Is this the home server of an author?
7490:
7491: sub ishome {
7492: my $author=shift;
7493: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
7494: my ($udom,$uname)=split(/\//,$author);
7495: my $proname=propath($udom,$uname);
7496: if (-e $proname) {
7497: return 'owner';
7498: } else {
7499: return 'not_owner';
7500: }
7501: }
7502:
7503: # ======================================================= Continue main program
7504: # ---------------------------------------------------- Fork once and dissociate
7505:
7506: my $fpid=fork;
7507: exit if $fpid;
7508: die "Couldn't fork: $!" unless defined ($fpid);
7509:
7510: POSIX::setsid() or die "Can't start new session: $!";
7511:
7512: # ------------------------------------------------------- Write our PID on disk
7513:
7514: my $execdir=$perlvar{'lonDaemons'};
7515: open (PIDSAVE,">$execdir/logs/lond.pid");
7516: print PIDSAVE "$$\n";
7517: close(PIDSAVE);
7518: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
7519: &status('Starting');
7520:
7521:
7522:
7523: # ----------------------------------------------------- Install signal handlers
7524:
7525:
7526: $SIG{CHLD} = \&REAPER;
7527: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7528: $SIG{HUP} = \&HUPSMAN;
7529: $SIG{USR1} = \&checkchildren;
7530: $SIG{USR2} = \&UpdateHosts;
7531:
7532: # Read the host hashes:
7533: &Apache::lonnet::load_hosts_tab();
7534: my %iphost = &Apache::lonnet::get_iphost(1);
7535:
7536: $dist=`$perlvar{'lonDaemons'}/distprobe`;
7537:
7538: my $arch = `uname -i`;
7539: chomp($arch);
7540: if ($arch eq 'unknown') {
7541: $arch = `uname -m`;
7542: chomp($arch);
7543: }
7544:
7545: unless (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') {
7546: &logthis('<font color="blue">No connectionrules table. Will fallback to loncapa.conf</font>');
7547: }
7548:
7549: # --------------------------------------------------------------
7550: # Accept connections. When a connection comes in, it is validated
7551: # and if good, a child process is created to process transactions
7552: # along the connection.
7553:
7554: while (1) {
7555: &status('Starting accept');
7556: $client = $server->accept() or next;
7557: &status('Accepted '.$client.' off to spawn');
7558: make_new_child($client);
7559: &status('Finished spawning');
7560: }
7561:
7562: sub make_new_child {
7563: my $pid;
7564: # my $cipher; # Now global
7565: my $sigset;
7566:
7567: $client = shift;
7568: &status('Starting new child '.$client);
7569: &logthis('<font color="green"> Attempting to start child ('.$client.
7570: ")</font>");
7571: # block signal for fork
7572: $sigset = POSIX::SigSet->new(SIGINT);
7573: sigprocmask(SIG_BLOCK, $sigset)
7574: or die "Can't block SIGINT for fork: $!\n";
7575:
7576: die "fork: $!" unless defined ($pid = fork);
7577:
7578: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
7579: # connection liveness.
7580:
7581: #
7582: # Figure out who we're talking to so we can record the peer in
7583: # the pid hash.
7584: #
7585: my $caller = getpeername($client);
7586: my ($port,$iaddr);
7587: if (defined($caller) && length($caller) > 0) {
7588: ($port,$iaddr)=unpack_sockaddr_in($caller);
7589: } else {
7590: &logthis("Unable to determine who caller was, getpeername returned nothing");
7591: }
7592: if (defined($iaddr)) {
7593: $clientip = inet_ntoa($iaddr);
7594: Debug("Connected with $clientip");
7595: } else {
7596: &logthis("Unable to determine clientip");
7597: $clientip='Unavailable';
7598: }
7599:
7600: if ($pid) {
7601: # Parent records the child's birth and returns.
7602: sigprocmask(SIG_UNBLOCK, $sigset)
7603: or die "Can't unblock SIGINT for fork: $!\n";
7604: $children{$pid} = $clientip;
7605: &status('Started child '.$pid);
7606: close($client);
7607: return;
7608: } else {
7609: # Child can *not* return from this subroutine.
7610: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
7611: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
7612: #don't get intercepted
7613: $SIG{USR1}= \&logstatus;
7614: $SIG{ALRM}= \&timeout;
7615: #
7616: # Block sigpipe as it gets thrownon socket disconnect and we want to
7617: # deal with that as a read faiure instead.
7618: #
7619: my $blockset = POSIX::SigSet->new(SIGPIPE);
7620: sigprocmask(SIG_BLOCK, $blockset);
7621:
7622: $lastlog='Forked ';
7623: $status='Forked';
7624:
7625: # unblock signals
7626: sigprocmask(SIG_UNBLOCK, $sigset)
7627: or die "Can't unblock SIGINT for fork: $!\n";
7628:
7629: # my $tmpsnum=0; # Now global
7630: #---------------------------------------------------- kerberos 5 initialization
7631: &Authen::Krb5::init_context();
7632:
7633: my $no_ets;
7634: if ($dist =~ /^(?:centos|rhes|scientific|oracle)(\d+)$/) {
7635: if ($1 >= 7) {
7636: $no_ets = 1;
7637: }
7638: } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
7639: if (($1 eq '9.3') || ($1 >= 12.2)) {
7640: $no_ets = 1;
7641: }
7642: } elsif ($dist =~ /^sles(\d+)$/) {
7643: if ($1 > 11) {
7644: $no_ets = 1;
7645: }
7646: } elsif ($dist =~ /^fedora(\d+)$/) {
7647: if ($1 < 7) {
7648: $no_ets = 1;
7649: }
7650: }
7651: unless ($no_ets) {
7652: &Authen::Krb5::init_ets();
7653: }
7654:
7655: &status('Accepted connection');
7656: # =============================================================================
7657: # do something with the connection
7658: # -----------------------------------------------------------------------------
7659: # see if we know client and 'check' for spoof IP by ineffective challenge
7660:
7661: my $outsideip=$clientip;
7662: if ($clientip eq '127.0.0.1') {
7663: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
7664: }
7665: &ReadManagerTable();
7666: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
7667: my $ismanager=($managers{$outsideip} ne undef);
7668: $clientname = "[unknown]";
7669: if($clientrec) { # Establish client type.
7670: $ConnectionType = "client";
7671: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
7672: if($ismanager) {
7673: $ConnectionType = "both";
7674: }
7675: } else {
7676: $ConnectionType = "manager";
7677: $clientname = $managers{$outsideip};
7678: }
7679: my $clientok;
7680:
7681: if ($clientrec || $ismanager) {
7682: &status("Waiting for init from $clientip $clientname");
7683: &logthis('<font color="yellow">INFO: Connection, '.
7684: $clientip.
7685: " ($clientname) connection type = $ConnectionType </font>" );
7686: &status("Connecting $clientip ($clientname))");
7687: my $remotereq=<$client>;
7688: chomp($remotereq);
7689: Debug("Got init: $remotereq");
7690:
7691: if ($remotereq =~ /^init/) {
7692: &sethost("sethost:$perlvar{'lonHostID'}");
7693: #
7694: # If the remote is attempting a local init... give that a try:
7695: #
7696: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
7697: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
7698: # version when initiating the connection. For LON-CAPA 2.8 and older,
7699: # the version is retrieved from the global %loncaparevs in lonnet.pm.
7700: # $clientversion contains path to keyfile if $inittype eq 'local'
7701: # it's overridden below in this case
7702: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
7703:
7704: # If the connection type is ssl, but I didn't get my
7705: # certificate files yet, then I'll drop back to
7706: # insecure (if allowed).
7707:
7708: if ($inittype eq "ssl") {
7709: my $context;
7710: if ($clientsamedom) {
7711: $context = 'dom';
7712: if ($secureconf{'connfrom'}{'dom'} eq 'no') {
7713: $inittype = "";
7714: }
7715: } elsif ($clientsameinst) {
7716: $context = 'intdom';
7717: if ($secureconf{'connfrom'}{'intdom'} eq 'no') {
7718: $inittype = "";
7719: }
7720: } else {
7721: $context = 'other';
7722: if ($secureconf{'connfrom'}{'other'} eq 'no') {
7723: $inittype = "";
7724: }
7725: }
7726: if ($inittype eq '') {
7727: &logthis("<font color=\"blue\"> Domain config set "
7728: ."to no ssl for $clientname (context: $context)"
7729: ." -- trying insecure auth</font>");
7730: }
7731: }
7732:
7733: if($inittype eq "ssl") {
7734: my ($ca, $cert) = lonssl::CertificateFile;
7735: my $kfile = lonssl::KeyFile;
7736: if((!$ca) ||
7737: (!$cert) ||
7738: (!$kfile)) {
7739: $inittype = ""; # This forces insecure attempt.
7740: &logthis("<font color=\"blue\"> Certificates not "
7741: ."installed -- trying insecure auth</font>");
7742: } else { # SSL certificates are in place so
7743: } # Leave the inittype alone.
7744: }
7745:
7746: if($inittype eq "local") {
7747: $clientversion = $perlvar{'lonVersion'};
7748: my $key = LocalConnection($client, $remotereq);
7749: if($key) {
7750: Debug("Got local key $key");
7751: $clientok = 1;
7752: my $cipherkey = pack("H32", $key);
7753: $cipher = new IDEA($cipherkey);
7754: print $client "ok:local\n";
7755: &logthis('<font color="green">'
7756: . "Successful local authentication </font>");
7757: $keymode = "local"
7758: } else {
7759: Debug("Failed to get local key");
7760: $clientok = 0;
7761: shutdown($client, 3);
7762: close $client;
7763: }
7764: } elsif ($inittype eq "ssl") {
7765: my $key = SSLConnection($client,$clientname);
7766: if ($key) {
7767: $clientok = 1;
7768: my $cipherkey = pack("H32", $key);
7769: $cipher = new IDEA($cipherkey);
7770: &logthis('<font color="green">'
7771: ."Successfull ssl authentication with $clientname </font>");
7772: $keymode = "ssl";
7773:
7774: } else {
7775: $clientok = 0;
7776: close $client;
7777: }
7778:
7779: } else {
7780: my $ok = InsecureConnection($client);
7781: if($ok) {
7782: $clientok = 1;
7783: &logthis('<font color="green">'
7784: ."Successful insecure authentication with $clientname </font>");
7785: print $client "ok\n";
7786: $keymode = "insecure";
7787: } else {
7788: &logthis('<font color="yellow">'
7789: ."Attempted insecure connection disallowed </font>");
7790: close $client;
7791: $clientok = 0;
7792: }
7793: }
7794: } else {
7795: &logthis(
7796: "<font color='blue'>WARNING: "
7797: ."$clientip failed to initialize: >$remotereq< </font>");
7798: &status('No init '.$clientip);
7799: }
7800: } else {
7801: &logthis(
7802: "<font color='blue'>WARNING: Unknown client $clientip</font>");
7803: &status('Hung up on '.$clientip);
7804: }
7805:
7806: if ($clientok) {
7807: # ---------------- New known client connecting, could mean machine online again
7808: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
7809: && $clientip ne '127.0.0.1') {
7810: &Apache::lonnet::reconlonc($clientname);
7811: }
7812: &logthis("<font color='green'>Established connection: $clientname</font>");
7813: &status('Will listen to '.$clientname);
7814: # ------------------------------------------------------------ Process requests
7815: my $keep_going = 1;
7816: my $user_input;
7817:
7818: while(($user_input = get_request) && $keep_going) {
7819: alarm(120);
7820: Debug("Main: Got $user_input\n");
7821: $keep_going = &process_request($user_input);
7822: alarm(0);
7823: &status('Listening to '.$clientname." ($keymode)");
7824: }
7825:
7826: # --------------------------------------------- client unknown or fishy, refuse
7827: } else {
7828: print $client "refused\n";
7829: $client->close();
7830: &logthis("<font color='blue'>WARNING: "
7831: ."Rejected client $clientip, closing connection</font>");
7832: }
7833: }
7834:
7835: # =============================================================================
7836:
7837: &logthis("<font color='red'>CRITICAL: "
7838: ."Disconnect from $clientip ($clientname)</font>");
7839:
7840:
7841: # this exit is VERY important, otherwise the child will become
7842: # a producer of more and more children, forking yourself into
7843: # process death.
7844: exit;
7845:
7846: }
7847:
7848: #
7849: # Used to determine if a particular client is from the same domain
7850: # as the current server, or from the same internet domain, and
7851: # also if the client can host sessions for the domain's users.
7852: # A hash is populated with keys set to commands sent by the client
7853: # which may not be executed for this domain.
7854: #
7855: # Optional input -- the client to check for domain and internet domain.
7856: # If not specified, defaults to the package variable: $clientname
7857: #
7858: # If called in array context will not set package variables, but will
7859: # instead return an array of two values - (a) true if client is in the
7860: # same domain as the server, and (b) true if client is in the same
7861: # internet domain.
7862: #
7863: # If called in scalar context, sets package variables for current client:
7864: #
7865: # $clienthomedom - LonCAPA domain of homeID for client.
7866: # $clientsamedom - LonCAPA domain same for this host and client.
7867: # $clientintdom - LonCAPA "internet domain" for client.
7868: # $clientsameinst - LonCAPA "internet domain" same for this host & client.
7869: # $clientremoteok - If current domain permits hosting on this client: 1
7870: # %clientprohibited - Commands prohibited for domain's users for this client.
7871: #
7872: # if the host and client have the same "internet domain", then the value
7873: # of $clientremoteok is not used, and no commands are prohibited.
7874: #
7875: # returns 1 to indicate package variables have been set for current client.
7876: #
7877:
7878: sub set_client_info {
7879: my ($lonhost) = @_;
7880: $lonhost ||= $clientname;
7881: my $clienthost = &Apache::lonnet::hostname($lonhost);
7882: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
7883: my $homedom = &Apache::lonnet::host_domain($clientserverhomeID);
7884: my $samedom = 0;
7885: if ($perlvar{'lonDefDomain'} eq $homedom) {
7886: $samedom = 1;
7887: }
7888: my $intdom = &Apache::lonnet::internet_dom($clientserverhomeID);
7889: my $sameinst = 0;
7890: if ($intdom ne '') {
7891: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
7892: if (ref($internet_names) eq 'ARRAY') {
7893: if (grep(/^\Q$intdom\E$/,@{$internet_names})) {
7894: $sameinst = 1;
7895: }
7896: }
7897: }
7898: if (wantarray) {
7899: return ($samedom,$sameinst);
7900: } else {
7901: $clienthomedom = $homedom;
7902: $clientsamedom = $samedom;
7903: $clientintdom = $intdom;
7904: $clientsameinst = $sameinst;
7905: if ($clientsameinst) {
7906: undef($clientremoteok);
7907: undef(%clientprohibited);
7908: } else {
7909: $clientremoteok = &get_remote_hostable($currentdomainid);
7910: %clientprohibited = &get_prohibited($currentdomainid);
7911: }
7912: return 1;
7913: }
7914: }
7915:
7916: #
7917: # Determine if a user is an author for the indicated domain.
7918: #
7919: # Parameters:
7920: # domain - domain to check in .
7921: # user - Name of user to check.
7922: #
7923: # Return:
7924: # 1 - User is an author for domain.
7925: # 0 - User is not an author for domain.
7926: sub is_author {
7927: my ($domain, $user) = @_;
7928:
7929: &Debug("is_author: $user @ $domain");
7930:
7931: my $hashref = &tie_user_hash($domain, $user, "roles",
7932: &GDBM_READER());
7933:
7934: # Author role should show up as a key /domain/_au
7935:
7936: my $value;
7937: if ($hashref) {
7938:
7939: my $key = "/$domain/_au";
7940: if (defined($hashref)) {
7941: $value = $hashref->{$key};
7942: if(!untie_user_hash($hashref)) {
7943: return 'error: ' . ($!+0)." untie (GDBM) Failed";
7944: }
7945: }
7946:
7947: if(defined($value)) {
7948: &Debug("$user @ $domain is an author");
7949: }
7950: } else {
7951: return 'error: '.($!+0)." tie (GDBM) Failed";
7952: }
7953:
7954: return defined($value);
7955: }
7956: #
7957: # Checks to see if the input roleput request was to set
7958: # an author role. If so, creates construction space
7959: # Parameters:
7960: # request - The request sent to the rolesput subchunk.
7961: # We're looking for /domain/_au
7962: # domain - The domain in which the user is having roles doctored.
7963: # user - Name of the user for which the role is being put.
7964: # authtype - The authentication type associated with the user.
7965: #
7966: sub manage_permissions {
7967: my ($request, $domain, $user, $authtype) = @_;
7968: # See if the request is of the form /$domain/_au
7969: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
7970: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
7971: unless (-e $path) {
7972: mkdir($path);
7973: }
7974: unless (-e $path.'/'.$user) {
7975: mkdir($path.'/'.$user);
7976: }
7977: }
7978: }
7979:
7980:
7981: #
7982: # Return the full path of a user password file, whether it exists or not.
7983: # Parameters:
7984: # domain - Domain in which the password file lives.
7985: # user - name of the user.
7986: # Returns:
7987: # Full passwd path:
7988: #
7989: sub password_path {
7990: my ($domain, $user) = @_;
7991: return &propath($domain, $user).'/passwd';
7992: }
7993:
7994: # Password Filename
7995: # Returns the path to a passwd file given domain and user... only if
7996: # it exists.
7997: # Parameters:
7998: # domain - Domain in which to search.
7999: # user - username.
8000: # Returns:
8001: # - If the password file exists returns its path.
8002: # - If the password file does not exist, returns undefined.
8003: #
8004: sub password_filename {
8005: my ($domain, $user) = @_;
8006:
8007: Debug ("PasswordFilename called: dom = $domain user = $user");
8008:
8009: my $path = &password_path($domain, $user);
8010: Debug("PasswordFilename got path: $path");
8011: if(-e $path) {
8012: return $path;
8013: } else {
8014: return undef;
8015: }
8016: }
8017:
8018: #
8019: # Rewrite the contents of the user's passwd file.
8020: # Parameters:
8021: # domain - domain of the user.
8022: # name - User's name.
8023: # contents - New contents of the file.
8024: # saveold - (optional). If true save old file in a passwd.bak file.
8025: # Returns:
8026: # 0 - Failed.
8027: # 1 - Success.
8028: #
8029: sub rewrite_password_file {
8030: my ($domain, $user, $contents, $saveold) = @_;
8031:
8032: my $file = &password_filename($domain, $user);
8033: if (defined $file) {
8034: if ($saveold) {
8035: my $bakfile = $file.'.bak';
8036: if (CopyFile($file,$bakfile)) {
8037: chmod(0400,$bakfile);
8038: &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain");
8039: } else {
8040: &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain");
8041: }
8042: }
8043: my $pf = IO::File->new(">$file");
8044: if($pf) {
8045: print $pf "$contents\n";
8046: return 1;
8047: } else {
8048: return 0;
8049: }
8050: } else {
8051: return 0;
8052: }
8053:
8054: }
8055:
8056: #
8057: # get_auth_type - Determines the authorization type of a user in a domain.
8058:
8059: # Returns the authorization type or nouser if there is no such user.
8060: #
8061: sub get_auth_type {
8062: my ($domain, $user) = @_;
8063:
8064: Debug("get_auth_type( $domain, $user ) \n");
8065: my $proname = &propath($domain, $user);
8066: my $passwdfile = "$proname/passwd";
8067: if( -e $passwdfile ) {
8068: my $pf = IO::File->new($passwdfile);
8069: my $realpassword = <$pf>;
8070: chomp($realpassword);
8071: Debug("Password info = $realpassword\n");
8072: my ($authtype, $contentpwd) = split(/:/, $realpassword);
8073: Debug("Authtype = $authtype, content = $contentpwd\n");
8074: return "$authtype:$contentpwd";
8075: } else {
8076: Debug("Returning nouser");
8077: return "nouser";
8078: }
8079: }
8080:
8081: #
8082: # Validate a user given their domain, name and password. This utility
8083: # function is used by both AuthenticateHandler and ChangePasswordHandler
8084: # to validate the login credentials of a user.
8085: # Parameters:
8086: # $domain - The domain being logged into (this is required due to
8087: # the capability for multihomed systems.
8088: # $user - The name of the user being validated.
8089: # $password - The user's propoposed password.
8090: #
8091: # Returns:
8092: # 1 - The domain,user,pasword triplet corresponds to a valid
8093: # user.
8094: # 0 - The domain,user,password triplet is not a valid user.
8095: #
8096: sub validate_user {
8097: my ($domain, $user, $password, $checkdefauth) = @_;
8098:
8099: # Why negative ~pi you may well ask? Well this function is about
8100: # authentication, and therefore very important to get right.
8101: # I've initialized the flag that determines whether or not I've
8102: # validated correctly to a value it's not supposed to get.
8103: # At the end of this function. I'll ensure that it's not still that
8104: # value so we don't just wind up returning some accidental value
8105: # as a result of executing an unforseen code path that
8106: # did not set $validated. At the end of valid execution paths,
8107: # validated shoule be 1 for success or 0 for failuer.
8108:
8109: my $validated = -3.14159;
8110:
8111: # How we authenticate is determined by the type of authentication
8112: # the user has been assigned. If the authentication type is
8113: # "nouser", the user does not exist so we will return 0.
8114:
8115: my $contents = &get_auth_type($domain, $user);
8116: my ($howpwd, $contentpwd) = split(/:/, $contents);
8117:
8118: my $null = pack("C",0); # Used by kerberos auth types.
8119:
8120: if ($howpwd eq 'nouser') {
8121: if ($checkdefauth) {
8122: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
8123: if ($domdefaults{'auth_def'} eq 'localauth') {
8124: $howpwd = $domdefaults{'auth_def'};
8125: $contentpwd = $domdefaults{'auth_arg_def'};
8126: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
8127: ($domdefaults{'auth_def'} eq 'krb5')) &&
8128: ($domdefaults{'auth_arg_def'} ne '')) {
8129: $howpwd = $domdefaults{'auth_def'};
8130: $contentpwd = $domdefaults{'auth_arg_def'};
8131: }
8132: }
8133: }
8134: if ($howpwd ne 'nouser') {
8135: if($howpwd eq "internal") { # Encrypted is in local password file.
8136: if (length($contentpwd) == 13) {
8137: $validated = (crypt($password,$contentpwd) eq $contentpwd);
8138: if ($validated) {
8139: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
8140: if ($domdefaults{'intauth_switch'}) {
8141: my $ncpass = &hash_passwd($domain,$password);
8142: my $saveold;
8143: if ($domdefaults{'intauth_switch'} == 2) {
8144: $saveold = 1;
8145: }
8146: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) {
8147: &update_passwd_history($user,$domain,$howpwd,'conversion');
8148: &logthis("Validated password hashed with bcrypt for $user:$domain");
8149: }
8150: }
8151: }
8152: } else {
8153: $validated = &check_internal_passwd($password,$contentpwd,$domain,$user);
8154: }
8155: }
8156: elsif ($howpwd eq "unix") { # User is a normal unix user.
8157: $contentpwd = (getpwnam($user))[1];
8158: if($contentpwd) {
8159: if($contentpwd eq 'x') { # Shadow password file...
8160: my $pwauth_path = "/usr/local/sbin/pwauth";
8161: open PWAUTH, "|$pwauth_path" or
8162: die "Cannot invoke authentication";
8163: print PWAUTH "$user\n$password\n";
8164: close PWAUTH;
8165: $validated = ! $?;
8166:
8167: } else { # Passwords in /etc/passwd.
8168: $validated = (crypt($password,
8169: $contentpwd) eq $contentpwd);
8170: }
8171: } else {
8172: $validated = 0;
8173: }
8174: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
8175: my $checkwithkrb5 = 0;
8176: if ($dist =~/^fedora(\d+)$/) {
8177: if ($1 > 11) {
8178: $checkwithkrb5 = 1;
8179: }
8180: } elsif ($dist =~ /^suse([\d.]+)$/) {
8181: if ($1 > 11.1) {
8182: $checkwithkrb5 = 1;
8183: }
8184: }
8185: if ($checkwithkrb5) {
8186: $validated = &krb5_authen($password,$null,$user,$contentpwd);
8187: } else {
8188: $validated = &krb4_authen($password,$null,$user,$contentpwd);
8189: }
8190: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
8191: $validated = &krb5_authen($password,$null,$user,$contentpwd);
8192: } elsif ($howpwd eq "localauth") {
8193: # Authenticate via installation specific authentcation method:
8194: $validated = &localauth::localauth($user,
8195: $password,
8196: $contentpwd,
8197: $domain);
8198: if ($validated < 0) {
8199: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
8200: $validated = 0;
8201: }
8202: } else { # Unrecognized auth is also bad.
8203: $validated = 0;
8204: }
8205: } else {
8206: $validated = 0;
8207: }
8208: #
8209: # $validated has the correct stat of the authentication:
8210: #
8211:
8212: unless ($validated != -3.14159) {
8213: # I >really really< want to know if this happens.
8214: # since it indicates that user authentication is badly
8215: # broken in some code path.
8216: #
8217: die "ValidateUser - failed to set the value of validated $domain, $user $password";
8218: }
8219: return $validated;
8220: }
8221:
8222: sub check_internal_passwd {
8223: my ($plainpass,$stored,$domain,$user) = @_;
8224: my (undef,$method,@rest) = split(/!/,$stored);
8225: if ($method eq 'bcrypt') {
8226: my $result = &hash_passwd($domain,$plainpass,@rest);
8227: if ($result ne $stored) {
8228: return 0;
8229: }
8230: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
8231: if ($domdefaults{'intauth_check'}) {
8232: # Upgrade to a larger number of rounds if necessary
8233: my $defaultcost = $domdefaults{'intauth_cost'};
8234: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
8235: $defaultcost = 10;
8236: }
8237: if (int($rest[0])<int($defaultcost)) {
8238: if ($domdefaults{'intauth_check'} == 1) {
8239: my $ncpass = &hash_passwd($domain,$plainpass);
8240: if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
8241: &update_passwd_history($user,$domain,'internal','update cost');
8242: &logthis("Validated password hashed with bcrypt for $user:$domain");
8243: }
8244: return 1;
8245: } elsif ($domdefaults{'intauth_check'} == 2) {
8246: return 0;
8247: }
8248: }
8249: } else {
8250: return 1;
8251: }
8252: }
8253: return 0;
8254: }
8255:
8256: sub get_last_authchg {
8257: my ($domain,$user) = @_;
8258: my $lastmod;
8259: my $logname = &propath($domain,$user).'/passwd.log';
8260: if (-e "$logname") {
8261: $lastmod = (stat("$logname"))[9];
8262: }
8263: return $lastmod;
8264: }
8265:
8266: sub krb4_authen {
8267: my ($password,$null,$user,$contentpwd) = @_;
8268: my $validated = 0;
8269: if (!($password =~ /$null/) ) { # Null password not allowed.
8270: eval {
8271: require Authen::Krb4;
8272: };
8273: if (!$@) {
8274: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
8275: "",
8276: $contentpwd,,
8277: 'krbtgt',
8278: $contentpwd,
8279: 1,
8280: $password);
8281: if(!$k4error) {
8282: $validated = 1;
8283: } else {
8284: $validated = 0;
8285: &logthis('krb4: '.$user.', '.$contentpwd.', '.
8286: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
8287: }
8288: } else {
8289: $validated = krb5_authen($password,$null,$user,$contentpwd);
8290: }
8291: }
8292: return $validated;
8293: }
8294:
8295: sub krb5_authen {
8296: my ($password,$null,$user,$contentpwd) = @_;
8297: my $validated = 0;
8298: if(!($password =~ /$null/)) { # Null password not allowed.
8299: my $krbclient = &Authen::Krb5::parse_name($user.'@'
8300: .$contentpwd);
8301: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
8302: my $krbserver = &Authen::Krb5::parse_name($krbservice);
8303: my $credentials= &Authen::Krb5::cc_default();
8304: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
8305: .$contentpwd));
8306: my $krbreturn;
8307: if (exists(&Authen::Krb5::get_init_creds_password)) {
8308: $krbreturn =
8309: &Authen::Krb5::get_init_creds_password($krbclient,$password,
8310: $krbservice);
8311: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
8312: } else {
8313: $krbreturn =
8314: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
8315: $password,$credentials);
8316: $validated = ($krbreturn == 1);
8317: }
8318: if (!$validated) {
8319: &logthis('krb5: '.$user.', '.$contentpwd.', '.
8320: &Authen::Krb5::error());
8321: }
8322: }
8323: return $validated;
8324: }
8325:
8326: sub addline {
8327: my ($fname,$hostid,$ip,$newline)=@_;
8328: my $contents;
8329: my $found=0;
8330: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
8331: my $sh;
8332: if ($sh=IO::File->new("$fname.subscription")) {
8333: while (my $subline=<$sh>) {
8334: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
8335: }
8336: $sh->close();
8337: }
8338: $sh=IO::File->new(">$fname.subscription");
8339: if ($contents) { print $sh $contents; }
8340: if ($newline) { print $sh $newline; }
8341: $sh->close();
8342: return $found;
8343: }
8344:
8345: sub get_chat {
8346: my ($cdom,$cname,$udom,$uname,$group)=@_;
8347:
8348: my @entries=();
8349: my $namespace = 'nohist_chatroom';
8350: my $namespace_inroom = 'nohist_inchatroom';
8351: if ($group ne '') {
8352: $namespace .= '_'.$group;
8353: $namespace_inroom .= '_'.$group;
8354: }
8355: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
8356: &GDBM_READER());
8357: if ($hashref) {
8358: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
8359: &untie_user_hash($hashref);
8360: }
8361: my @participants=();
8362: my $cutoff=time-60;
8363: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
8364: &GDBM_WRCREAT());
8365: if ($hashref) {
8366: $hashref->{$uname.':'.$udom}=time;
8367: foreach my $user (sort(keys(%$hashref))) {
8368: if ($hashref->{$user}>$cutoff) {
8369: push(@participants, 'active_participant:'.$user);
8370: }
8371: }
8372: &untie_user_hash($hashref);
8373: }
8374: return (@participants,@entries);
8375: }
8376:
8377: sub chat_add {
8378: my ($cdom,$cname,$newchat,$group)=@_;
8379: my @entries=();
8380: my $time=time;
8381: my $namespace = 'nohist_chatroom';
8382: my $logfile = 'chatroom.log';
8383: if ($group ne '') {
8384: $namespace .= '_'.$group;
8385: $logfile = 'chatroom_'.$group.'.log';
8386: }
8387: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
8388: &GDBM_WRCREAT());
8389: if ($hashref) {
8390: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
8391: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
8392: my ($thentime,$idnum)=split(/\_/,$lastid);
8393: my $newid=$time.'_000000';
8394: if ($thentime==$time) {
8395: $idnum=~s/^0+//;
8396: $idnum++;
8397: $idnum=substr('000000'.$idnum,-6,6);
8398: $newid=$time.'_'.$idnum;
8399: }
8400: $hashref->{$newid}=$newchat;
8401: my $expired=$time-3600;
8402: foreach my $comment (keys(%$hashref)) {
8403: my ($thistime) = ($comment=~/(\d+)\_/);
8404: if ($thistime<$expired) {
8405: delete $hashref->{$comment};
8406: }
8407: }
8408: {
8409: my $proname=&propath($cdom,$cname);
8410: if (open(CHATLOG,">>$proname/$logfile")) {
8411: print CHATLOG ("$time:".&unescape($newchat)."\n");
8412: }
8413: close(CHATLOG);
8414: }
8415: &untie_user_hash($hashref);
8416: }
8417: }
8418:
8419: sub unsub {
8420: my ($fname,$clientip)=@_;
8421: my $result;
8422: my $unsubs = 0; # Number of successful unsubscribes:
8423:
8424:
8425: # An old way subscriptions were handled was to have a
8426: # subscription marker file:
8427:
8428: Debug("Attempting unlink of $fname.$clientname");
8429: if (unlink("$fname.$clientname")) {
8430: $unsubs++; # Successful unsub via marker file.
8431: }
8432:
8433: # The more modern way to do it is to have a subscription list
8434: # file:
8435:
8436: if (-e "$fname.subscription") {
8437: my $found=&addline($fname,$clientname,$clientip,'');
8438: if ($found) {
8439: $unsubs++;
8440: }
8441: }
8442:
8443: # If either or both of these mechanisms succeeded in unsubscribing a
8444: # resource we can return ok:
8445:
8446: if($unsubs) {
8447: $result = "ok\n";
8448: } else {
8449: $result = "not_subscribed\n";
8450: }
8451:
8452: return $result;
8453: }
8454:
8455: sub currentversion {
8456: my $fname=shift;
8457: my $version=-1;
8458: my $ulsdir='';
8459: if ($fname=~/^(.+)\/[^\/]+$/) {
8460: $ulsdir=$1;
8461: }
8462: my ($fnamere1,$fnamere2);
8463: # remove version if already specified
8464: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
8465: # get the bits that go before and after the version number
8466: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
8467: $fnamere1=$1;
8468: $fnamere2='.'.$2;
8469: }
8470: if (-e $fname) { $version=1; }
8471: if (-e $ulsdir) {
8472: if(-d $ulsdir) {
8473: if (opendir(LSDIR,$ulsdir)) {
8474: my $ulsfn;
8475: while ($ulsfn=readdir(LSDIR)) {
8476: # see if this is a regular file (ignore links produced earlier)
8477: my $thisfile=$ulsdir.'/'.$ulsfn;
8478: unless (-l $thisfile) {
8479: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
8480: if ($1>$version) { $version=$1; }
8481: }
8482: }
8483: }
8484: closedir(LSDIR);
8485: $version++;
8486: }
8487: }
8488: }
8489: return $version;
8490: }
8491:
8492: sub thisversion {
8493: my $fname=shift;
8494: my $version=-1;
8495: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
8496: $version=$1;
8497: }
8498: return $version;
8499: }
8500:
8501: sub subscribe {
8502: my ($userinput,$clientip)=@_;
8503: my $result;
8504: my ($cmd,$fname)=split(/:/,$userinput,2);
8505: my $ownership=&ishome($fname);
8506: if ($ownership eq 'owner') {
8507: # explitly asking for the current version?
8508: unless (-e $fname) {
8509: my $currentversion=¤tversion($fname);
8510: if (&thisversion($fname)==$currentversion) {
8511: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
8512: my $root=$1;
8513: my $extension=$2;
8514: symlink($root.'.'.$extension,
8515: $root.'.'.$currentversion.'.'.$extension);
8516: unless ($extension=~/\.meta$/) {
8517: symlink($root.'.'.$extension.'.meta',
8518: $root.'.'.$currentversion.'.'.$extension.'.meta');
8519: }
8520: }
8521: }
8522: }
8523: if (-e $fname) {
8524: if (-d $fname) {
8525: $result="directory\n";
8526: } else {
8527: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
8528: my $now=time;
8529: my $found=&addline($fname,$clientname,$clientip,
8530: "$clientname:$clientip:$now\n");
8531: if ($found) { $result="$fname\n"; }
8532: # if they were subscribed to only meta data, delete that
8533: # subscription, when you subscribe to a file you also get
8534: # the metadata
8535: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
8536: $fname=~s/\/home\/httpd\/html\/res/raw/;
8537: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
8538: $protocol = 'http' if ($protocol ne 'https');
8539: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
8540: $result="$fname\n";
8541: }
8542: } else {
8543: $result="not_found\n";
8544: }
8545: } else {
8546: $result="rejected\n";
8547: }
8548: return $result;
8549: }
8550: # Change the passwd of a unix user. The caller must have
8551: # first verified that the user is a loncapa user.
8552: #
8553: # Parameters:
8554: # user - Unix user name to change.
8555: # pass - New password for the user.
8556: # Returns:
8557: # ok - if success
8558: # other - Some meaningfule error message string.
8559: # NOTE:
8560: # invokes a setuid script to change the passwd.
8561: sub change_unix_password {
8562: my ($user, $pass) = @_;
8563:
8564: &Debug("change_unix_password");
8565: my $execdir=$perlvar{'lonDaemons'};
8566: &Debug("Opening lcpasswd pipeline");
8567: my $pf = IO::File->new("|$execdir/lcpasswd > "
8568: ."$perlvar{'lonDaemons'}"
8569: ."/logs/lcpasswd.log");
8570: print $pf "$user\n$pass\n$pass\n";
8571: close $pf;
8572: my $err = $?;
8573: return ($err < @passwderrors) ? $passwderrors[$err] :
8574: "pwchange_falure - unknown error";
8575:
8576:
8577: }
8578:
8579:
8580: sub make_passwd_file {
8581: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
8582: my $result="ok";
8583: if ($umode eq 'krb4' or $umode eq 'krb5') {
8584: {
8585: my $pf = IO::File->new(">$passfilename");
8586: if ($pf) {
8587: print $pf "$umode:$npass\n";
8588: &update_passwd_history($uname,$udom,$umode,$action);
8589: } else {
8590: $result = "pass_file_failed_error";
8591: }
8592: }
8593: } elsif ($umode eq 'internal') {
8594: my $ncpass = &hash_passwd($udom,$npass);
8595: {
8596: &Debug("Creating internal auth");
8597: my $pf = IO::File->new(">$passfilename");
8598: if($pf) {
8599: print $pf "internal:$ncpass\n";
8600: &update_passwd_history($uname,$udom,$umode,$action);
8601: } else {
8602: $result = "pass_file_failed_error";
8603: }
8604: }
8605: } elsif ($umode eq 'localauth') {
8606: {
8607: my $pf = IO::File->new(">$passfilename");
8608: if($pf) {
8609: print $pf "localauth:$npass\n";
8610: &update_passwd_history($uname,$udom,$umode,$action);
8611: } else {
8612: $result = "pass_file_failed_error";
8613: }
8614: }
8615: } elsif ($umode eq 'unix') {
8616: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
8617: $result="no_new_unix_accounts";
8618: } elsif ($umode eq 'none') {
8619: {
8620: my $pf = IO::File->new("> $passfilename");
8621: if($pf) {
8622: print $pf "none:\n";
8623: } else {
8624: $result = "pass_file_failed_error";
8625: }
8626: }
8627: } elsif ($umode eq 'lti') {
8628: my $pf = IO::File->new(">$passfilename");
8629: if($pf) {
8630: print $pf "lti:\n";
8631: &update_passwd_history($uname,$udom,$umode,$action);
8632: } else {
8633: $result = "pass_file_failed_error";
8634: }
8635: } else {
8636: $result="auth_mode_error";
8637: }
8638: return $result;
8639: }
8640:
8641: sub convert_photo {
8642: my ($start,$dest)=@_;
8643: system("convert $start $dest");
8644: }
8645:
8646: sub sethost {
8647: my ($remotereq) = @_;
8648: my (undef,$hostid)=split(/:/,$remotereq);
8649: # ignore sethost if we are already correct
8650: if ($hostid eq $currenthostid) {
8651: return 'ok';
8652: }
8653:
8654: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
8655: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
8656: eq &Apache::lonnet::get_host_ip($hostid)) {
8657: $currenthostid =$hostid;
8658: $currentdomainid=&Apache::lonnet::host_domain($hostid);
8659: &set_client_info();
8660: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
8661: } else {
8662: &logthis("Requested host id $hostid not an alias of ".
8663: $perlvar{'lonHostID'}." refusing connection");
8664: return 'unable_to_set';
8665: }
8666: return 'ok';
8667: }
8668:
8669: sub version {
8670: my ($userinput)=@_;
8671: $remoteVERSION=(split(/:/,$userinput))[1];
8672: return "version:$VERSION";
8673: }
8674:
8675: sub get_usersession_config {
8676: my ($dom,$name) = @_;
8677: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8678: if (defined($cached)) {
8679: return $usersessionconf;
8680: } else {
8681: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
8682: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
8683: return $domconfig{'usersessions'};
8684: }
8685: return;
8686: }
8687:
8688: sub get_usersearch_config {
8689: my ($dom,$name) = @_;
8690: my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8691: if (defined($cached)) {
8692: return $usersearchconf;
8693: } else {
8694: my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
8695: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600);
8696: return $domconfig{'directorysrch'};
8697: }
8698: return;
8699: }
8700:
8701: sub get_prohibited {
8702: my ($dom) = @_;
8703: my $name = 'trust';
8704: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8705: unless (defined($cached)) {
8706: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
8707: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
8708: $trustconfig = $domconfig{'trust'};
8709: }
8710: my %prohibited;
8711: if (ref($trustconfig)) {
8712: foreach my $prefix (keys(%{$trustconfig})) {
8713: if (ref($trustconfig->{$prefix}) eq 'HASH') {
8714: my $reject;
8715: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
8716: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
8717: $reject = 1;
8718: }
8719: }
8720: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
8721: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
8722: $reject = 0;
8723: } else {
8724: $reject = 1;
8725: }
8726: }
8727: if ($reject) {
8728: $prohibited{$prefix} = 1;
8729: }
8730: }
8731: }
8732: }
8733: return %prohibited;
8734: }
8735:
8736: sub get_remote_hostable {
8737: my ($dom) = @_;
8738: my $result;
8739: if ($clientintdom) {
8740: $result = 1;
8741: my $remsessconf = &get_usersession_config($dom,'remotesession');
8742: if (ref($remsessconf) eq 'HASH') {
8743: if (ref($remsessconf->{'remote'}) eq 'HASH') {
8744: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
8745: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
8746: $result = 0;
8747: }
8748: }
8749: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
8750: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
8751: $result = 1;
8752: } else {
8753: $result = 0;
8754: }
8755: }
8756: }
8757: }
8758: }
8759: return $result;
8760: }
8761:
8762: sub distro_and_arch {
8763: return $dist.':'.$arch;
8764: }
8765:
8766: # ----------------------------------- POD (plain old documentation, CPAN style)
8767:
8768: =head1 NAME
8769:
8770: lond - "LON Daemon" Server (port "LOND" 5663)
8771:
8772: =head1 SYNOPSIS
8773:
8774: Usage: B<lond>
8775:
8776: Should only be run as user=www. This is a command-line script which
8777: is invoked by B<loncron>. There is no expectation that a typical user
8778: will manually start B<lond> from the command-line. (In other words,
8779: DO NOT START B<lond> YOURSELF.)
8780:
8781: =head1 DESCRIPTION
8782:
8783: There are two characteristics associated with the running of B<lond>,
8784: PROCESS MANAGEMENT (starting, stopping, handling child processes)
8785: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
8786: subscriptions, etc). These are described in two large
8787: sections below.
8788:
8789: B<PROCESS MANAGEMENT>
8790:
8791: Preforker - server who forks first. Runs as a daemon. HUPs.
8792: Uses IDEA encryption
8793:
8794: B<lond> forks off children processes that correspond to the other servers
8795: in the network. Management of these processes can be done at the
8796: parent process level or the child process level.
8797:
8798: B<logs/lond.log> is the location of log messages.
8799:
8800: The process management is now explained in terms of linux shell commands,
8801: subroutines internal to this code, and signal assignments:
8802:
8803: =over 4
8804:
8805: =item *
8806:
8807: PID is stored in B<logs/lond.pid>
8808:
8809: This is the process id number of the parent B<lond> process.
8810:
8811: =item *
8812:
8813: SIGTERM and SIGINT
8814:
8815: Parent signal assignment:
8816: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
8817:
8818: Child signal assignment:
8819: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
8820: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
8821: to restart a new child.)
8822:
8823: Command-line invocations:
8824: B<kill> B<-s> SIGTERM I<PID>
8825: B<kill> B<-s> SIGINT I<PID>
8826:
8827: Subroutine B<HUNTSMAN>:
8828: This is only invoked for the B<lond> parent I<PID>.
8829: This kills all the children, and then the parent.
8830: The B<lonc.pid> file is cleared.
8831:
8832: =item *
8833:
8834: SIGHUP
8835:
8836: Current bug:
8837: This signal can only be processed the first time
8838: on the parent process. Subsequent SIGHUP signals
8839: have no effect.
8840:
8841: Parent signal assignment:
8842: $SIG{HUP} = \&HUPSMAN;
8843:
8844: Child signal assignment:
8845: none (nothing happens)
8846:
8847: Command-line invocations:
8848: B<kill> B<-s> SIGHUP I<PID>
8849:
8850: Subroutine B<HUPSMAN>:
8851: This is only invoked for the B<lond> parent I<PID>,
8852: This kills all the children, and then the parent.
8853: The B<lond.pid> file is cleared.
8854:
8855: =item *
8856:
8857: SIGUSR1
8858:
8859: Parent signal assignment:
8860: $SIG{USR1} = \&USRMAN;
8861:
8862: Child signal assignment:
8863: $SIG{USR1}= \&logstatus;
8864:
8865: Command-line invocations:
8866: B<kill> B<-s> SIGUSR1 I<PID>
8867:
8868: Subroutine B<USRMAN>:
8869: When invoked for the B<lond> parent I<PID>,
8870: SIGUSR1 is sent to all the children, and the status of
8871: each connection is logged.
8872:
8873: =item *
8874:
8875: SIGUSR2
8876:
8877: Parent Signal assignment:
8878: $SIG{USR2} = \&UpdateHosts
8879:
8880: Child signal assignment:
8881: NONE
8882:
8883:
8884: =item *
8885:
8886: SIGCHLD
8887:
8888: Parent signal assignment:
8889: $SIG{CHLD} = \&REAPER;
8890:
8891: Child signal assignment:
8892: none
8893:
8894: Command-line invocations:
8895: B<kill> B<-s> SIGCHLD I<PID>
8896:
8897: Subroutine B<REAPER>:
8898: This is only invoked for the B<lond> parent I<PID>.
8899: Information pertaining to the child is removed.
8900: The socket port is cleaned up.
8901:
8902: =back
8903:
8904: B<SERVER-SIDE ACTIVITIES>
8905:
8906: Server-side information can be accepted in an encrypted or non-encrypted
8907: method.
8908:
8909: =over 4
8910:
8911: =item ping
8912:
8913: Query a client in the hosts.tab table; "Are you there?"
8914:
8915: =item pong
8916:
8917: Respond to a ping query.
8918:
8919: =item ekey
8920:
8921: Read in encrypted key, make cipher. Respond with a buildkey.
8922:
8923: =item load
8924:
8925: Respond with CPU load based on a computation upon /proc/loadavg.
8926:
8927: =item currentauth
8928:
8929: Reply with current authentication information (only over an
8930: encrypted channel).
8931:
8932: =item auth
8933:
8934: Only over an encrypted channel, reply as to whether a user's
8935: authentication information can be validated.
8936:
8937: =item passwd
8938:
8939: Allow for a password to be set.
8940:
8941: =item makeuser
8942:
8943: Make a user.
8944:
8945: =item changeuserauth
8946:
8947: Allow for authentication mechanism and password to be changed.
8948:
8949: =item home
8950:
8951: Respond to a question "are you the home for a given user?"
8952:
8953: =item update
8954:
8955: Update contents of a subscribed resource.
8956:
8957: =item unsubscribe
8958:
8959: The server is unsubscribing from a resource.
8960:
8961: =item subscribe
8962:
8963: The server is subscribing to a resource.
8964:
8965: =item log
8966:
8967: Place in B<logs/lond.log>
8968:
8969: =item put
8970:
8971: stores hash in namespace
8972:
8973: =item rolesput
8974:
8975: put a role into a user's environment
8976:
8977: =item get
8978:
8979: returns hash with keys from array
8980: reference filled in from namespace
8981:
8982: =item eget
8983:
8984: returns hash with keys from array
8985: reference filled in from namesp (encrypts the return communication)
8986:
8987: =item rolesget
8988:
8989: get a role from a user's environment
8990:
8991: =item del
8992:
8993: deletes keys out of array from namespace
8994:
8995: =item keys
8996:
8997: returns namespace keys
8998:
8999: =item dump
9000:
9001: dumps the complete (or key matching regexp) namespace into a hash
9002:
9003: =item store
9004:
9005: stores hash permanently
9006: for this url; hashref needs to be given and should be a \%hashname; the
9007: remaining args aren't required and if they aren't passed or are '' they will
9008: be derived from the ENV
9009:
9010: =item restore
9011:
9012: returns a hash for a given url
9013:
9014: =item querysend
9015:
9016: Tells client about the lonsql process that has been launched in response
9017: to a sent query.
9018:
9019: =item queryreply
9020:
9021: Accept information from lonsql and make appropriate storage in temporary
9022: file space.
9023:
9024: =item idput
9025:
9026: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
9027: for each student, defined perhaps by the institutional Registrar.)
9028:
9029: =item idget
9030:
9031: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
9032: for each student, defined perhaps by the institutional Registrar.)
9033:
9034: =item iddel
9035:
9036: Deletes one or more ids in a domain's id database.
9037:
9038: =item tmpput
9039:
9040: Accept and store information in temporary space.
9041:
9042: =item tmpget
9043:
9044: Send along temporarily stored information.
9045:
9046: =item ls
9047:
9048: List part of a user's directory.
9049:
9050: =item pushtable
9051:
9052: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
9053: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
9054: must be restored manually in case of a problem with the new table file.
9055: pushtable requires that the request be encrypted and validated via
9056: ValidateManager. The form of the command is:
9057: enc:pushtable tablename <tablecontents> \n
9058: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
9059: cleartext newline.
9060:
9061: =item Hanging up (exit or init)
9062:
9063: What to do when a client tells the server that they (the client)
9064: are leaving the network.
9065:
9066: =item unknown command
9067:
9068: If B<lond> is sent an unknown command (not in the list above),
9069: it replys to the client "unknown_cmd".
9070:
9071:
9072: =item UNKNOWN CLIENT
9073:
9074: If the anti-spoofing algorithm cannot verify the client,
9075: the client is rejected (with a "refused" message sent
9076: to the client, and the connection is closed.
9077:
9078: =back
9079:
9080: =head1 PREREQUISITES
9081:
9082: IO::Socket
9083: IO::File
9084: Apache::File
9085: POSIX
9086: Crypt::IDEA
9087: GDBM_File
9088: Authen::Krb4
9089: Authen::Krb5
9090:
9091: =head1 COREQUISITES
9092:
9093: none
9094:
9095: =head1 OSNAMES
9096:
9097: linux
9098:
9099: =head1 SCRIPT CATEGORIES
9100:
9101: Server/Process
9102:
9103: =cut
9104:
9105:
9106: =pod
9107:
9108: =head1 LOG MESSAGES
9109:
9110: The messages below can be emitted in the lond log. This log is located
9111: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
9112: to provide coloring if examined from inside a web page. Some do not.
9113: Where color is used, the colors are; Red for sometihhng to get excited
9114: about and to follow up on. Yellow for something to keep an eye on to
9115: be sure it does not get worse, Green,and Blue for informational items.
9116:
9117: In the discussions below, sometimes reference is made to ~httpd
9118: when describing file locations. There isn't really an httpd
9119: user, however there is an httpd directory that gets installed in the
9120: place that user home directories go. On linux, this is usually
9121: (always?) /home/httpd.
9122:
9123:
9124: Some messages are colorless. These are usually (not always)
9125: Green/Blue color level messages.
9126:
9127: =over 2
9128:
9129: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
9130:
9131: A local connection negotiation was attempted by
9132: a host whose IP address was not 127.0.0.1.
9133: The socket is closed and the child will exit.
9134: lond has three ways to establish an encyrption
9135: key with a client:
9136:
9137: =over 2
9138:
9139: =item local
9140:
9141: The key is written and read from a file.
9142: This is only valid for connections from localhost.
9143:
9144: =item insecure
9145:
9146: The key is generated by the server and
9147: transmitted to the client.
9148:
9149: =item ssl (secure)
9150:
9151: An ssl connection is negotiated with the client,
9152: the key is generated by the server and sent to the
9153: client across this ssl connection before the
9154: ssl connectionis terminated and clear text
9155: transmission resumes.
9156:
9157: =back
9158:
9159: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
9160:
9161: The client is local but has not sent an initialization
9162: string that is the literal "init:local" The connection
9163: is closed and the child exits.
9164:
9165: =item Red CRITICAL Can't get key file <error>
9166:
9167: SSL key negotiation is being attempted but the call to
9168: lonssl::KeyFile failed. This usually means that the
9169: configuration file is not correctly defining or protecting
9170: the directories/files lonCertificateDirectory or
9171: lonnetPrivateKey
9172: <error> is a string that describes the reason that
9173: the key file could not be located.
9174:
9175: =item (Red) CRITICAL Can't get certificates <error>
9176:
9177: SSL key negotiation failed because we were not able to retrives our certificate
9178: or the CA's certificate in the call to lonssl::CertificateFile
9179: <error> is the textual reason this failed. Usual reasons:
9180:
9181: =over 2
9182:
9183: =item Apache config file for loncapa incorrect:
9184:
9185: one of the variables
9186: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
9187: undefined or incorrect
9188:
9189: =item Permission error:
9190:
9191: The directory pointed to by lonCertificateDirectory is not readable by lond
9192:
9193: =item Permission error:
9194:
9195: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
9196:
9197: =item Installation error:
9198:
9199: Either the certificate authority file or the certificate have not
9200: been installed in lonCertificateDirectory.
9201:
9202: =item (Red) CRITICAL SSL Socket promotion failed: <err>
9203:
9204: The promotion of the connection from plaintext to SSL failed
9205: <err> is the reason for the failure. There are two
9206: system calls involved in the promotion (one of which failed),
9207: a dup to produce
9208: a second fd on the raw socket over which the encrypted data
9209: will flow and IO::SOcket::SSL->new_from_fd which creates
9210: the SSL connection on the duped fd.
9211:
9212: =item (Blue) WARNING client did not respond to challenge
9213:
9214: This occurs on an insecure (non SSL) connection negotiation request.
9215: lond generates some number from the time, the PID and sends it to
9216: the client. The client must respond by echoing this information back.
9217: If the client does not do so, that's a violation of the challenge
9218: protocols and the connection will be failed.
9219:
9220: =item (Red) No manager table. Nobody can manage!!
9221:
9222: lond has the concept of privileged hosts that
9223: can perform remote management function such
9224: as update the hosts.tab. The manager hosts
9225: are described in the
9226: ~httpd/lonTabs/managers.tab file.
9227: this message is logged if this file is missing.
9228:
9229:
9230: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
9231:
9232: Reports the successful parse and registration
9233: of a specific manager.
9234:
9235: =item Green existing host <clustername:dnsname>
9236:
9237: The manager host is already defined in the hosts.tab
9238: the information in that table, rather than the info in the
9239: manager table will be used to determine the manager's ip.
9240:
9241: =item (Red) Unable to craete <filename>
9242:
9243: lond has been asked to create new versions of an administrative
9244: file (by a manager). When this is done, the new file is created
9245: in a temp file and then renamed into place so that there are always
9246: usable administrative files, even if the update fails. This failure
9247: message means that the temp file could not be created.
9248: The update is abandoned, and the old file is available for use.
9249:
9250: =item (Green) CopyFile from <oldname> to <newname> failed
9251:
9252: In an update of administrative files, the copy of the existing file to a
9253: backup file failed. The installation of the new file may still succeed,
9254: but there will not be a back up file to rever to (this should probably
9255: be yellow).
9256:
9257: =item (Green) Pushfile: backed up <oldname> to <newname>
9258:
9259: See above, the backup of the old administrative file succeeded.
9260:
9261: =item (Red) Pushfile: Unable to install <filename> <reason>
9262:
9263: The new administrative file could not be installed. In this case,
9264: the old administrative file is still in use.
9265:
9266: =item (Green) Installed new < filename>.
9267:
9268: The new administrative file was successfullly installed.
9269:
9270: =item (Red) Reinitializing lond pid=<pid>
9271:
9272: The lonc child process <pid> will be sent a USR2
9273: signal.
9274:
9275: =item (Red) Reinitializing self
9276:
9277: We've been asked to re-read our administrative files,and
9278: are doing so.
9279:
9280: =item (Yellow) error:Invalid process identifier <ident>
9281:
9282: A reinit command was received, but the target part of the
9283: command was not valid. It must be either
9284: 'lond' or 'lonc' but was <ident>
9285:
9286: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
9287:
9288: Checking to see if lond has been handed a valid edit
9289: command. It is possible the edit command is not valid
9290: in that case there are no log messages to indicate that.
9291:
9292: =item Result of password change for <username> pwchange_success
9293:
9294: The password for <username> was
9295: successfully changed.
9296:
9297: =item Unable to open <user> passwd to change password
9298:
9299: Could not rewrite the
9300: internal password file for a user
9301:
9302: =item Result of password change for <user> : <result>
9303:
9304: A unix password change for <user> was attempted
9305: and the pipe returned <result>
9306:
9307: =item LWP GET: <message> for <fname> (<remoteurl>)
9308:
9309: The lightweight process fetch for a resource failed
9310: with <message> the local filename that should
9311: have existed/been created was <fname> the
9312: corresponding URI: <remoteurl> This is emitted in several
9313: places.
9314:
9315: =item Unable to move <transname> to <destname>
9316:
9317: From fetch_user_file_handler - the user file was replicated but could not
9318: be mv'd to its final location.
9319:
9320: =item Looking for <domain> <username>
9321:
9322: From user_has_session_handler - This should be a Debug call instead
9323: it indicates lond is about to check whether the specified user has a
9324: session active on the specified domain on the local host.
9325:
9326: =item Client <ip> (<name>) hanging up: <input>
9327:
9328: lond has been asked to exit by its client. The <ip> and <name> identify the
9329: client systemand <input> is the full exit command sent to the server.
9330:
9331: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
9332:
9333: A lond child terminated. NOte that this termination can also occur when the
9334: child receives the QUIT or DIE signals. <pid> is the process id of the child,
9335: <hostname> the host lond is working for, and <message> the reason the child died
9336: to the best of our ability to get it (I would guess that any numeric value
9337: represents and errno value). This is immediately followed by
9338:
9339: =item Famous last words: Catching exception - <log>
9340:
9341: Where log is some recent information about the state of the child.
9342:
9343: =item Red CRITICAL: TIME OUT <pid>
9344:
9345: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
9346: doing an HTTP::GET.
9347:
9348: =item child <pid> died
9349:
9350: The reaper caught a SIGCHILD for the lond child process <pid>
9351: This should be modified to also display the IP of the dying child
9352: $children{$pid}
9353:
9354: =item Unknown child 0 died
9355: A child died but the wait for it returned a pid of zero which really should not
9356: ever happen.
9357:
9358: =item Child <which> - <pid> looks like we missed it's death
9359:
9360: When a sigchild is received, the reaper process checks all children to see if they are
9361: alive. If children are dying quite quickly, the lack of signal queuing can mean
9362: that a signal hearalds the death of more than one child. If so this message indicates
9363: which other one died. <which> is the ip of a dead child
9364:
9365: =item Free socket: <shutdownretval>
9366:
9367: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
9368: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
9369: to return anything. This is followed by:
9370:
9371: =item Red CRITICAL: Shutting down
9372:
9373: Just prior to exit.
9374:
9375: =item Free socket: <shutdownretval>
9376:
9377: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
9378: This is followed by:
9379:
9380: =item (Red) CRITICAL: Restarting
9381:
9382: lond is about to exec itself to restart.
9383:
9384: =item (Blue) Updating connections
9385:
9386: (In response to a USR2). All the children (except the one for localhost)
9387: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
9388:
9389: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
9390:
9391: Due to USR2 as above.
9392:
9393: =item (Green) keeping child for ip <ip> (pid = <pid>)
9394:
9395: In response to USR2 as above, the child indicated is not being restarted because
9396: it's assumed that we'll always need a child for the localhost.
9397:
9398:
9399: =item Going to check on the children
9400:
9401: Parent is about to check on the health of the child processes.
9402: Note that this is in response to a USR1 sent to the parent lond.
9403: there may be one or more of the next two messages:
9404:
9405: =item <pid> is dead
9406:
9407: A child that we have in our child hash as alive has evidently died.
9408:
9409: =item Child <pid> did not respond
9410:
9411: In the health check the child <pid> did not update/produce a pid_.txt
9412: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
9413: assumed to be hung in some un-fixable way.
9414:
9415: =item Finished checking children
9416:
9417: Master processs's USR1 processing is cojmplete.
9418:
9419: =item (Red) CRITICAL: ------- Starting ------
9420:
9421: (There are more '-'s on either side). Lond has forked itself off to
9422: form a new session and is about to start actual initialization.
9423:
9424: =item (Green) Attempting to start child (<client>)
9425:
9426: Started a new child process for <client>. Client is IO::Socket object
9427: connected to the child. This was as a result of a TCP/IP connection from a client.
9428:
9429: =item Unable to determine who caller was, getpeername returned nothing
9430:
9431: In child process initialization. either getpeername returned undef or
9432: a zero sized object was returned. Processing continues, but in my opinion,
9433: this should be cause for the child to exit.
9434:
9435: =item Unable to determine clientip
9436:
9437: In child process initialization. The peer address from getpeername was not defined.
9438: The client address is stored as "Unavailable" and processing continues.
9439:
9440: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
9441:
9442: In child initialization. A good connectionw as received from <ip>.
9443:
9444: =over 2
9445:
9446: =item <name>
9447:
9448: is the name of the client from hosts.tab.
9449:
9450: =item <type>
9451:
9452: Is the connection type which is either
9453:
9454: =over 2
9455:
9456: =item manager
9457:
9458: The connection is from a manager node, not in hosts.tab
9459:
9460: =item client
9461:
9462: the connection is from a non-manager in the hosts.tab
9463:
9464: =item both
9465:
9466: The connection is from a manager in the hosts.tab.
9467:
9468: =back
9469:
9470: =back
9471:
9472: =item (Blue) Certificates not installed -- trying insecure auth
9473:
9474: One of the certificate file, key file or
9475: certificate authority file could not be found for a client attempting
9476: SSL connection intiation. COnnection will be attemptied in in-secure mode.
9477: (this would be a system with an up to date lond that has not gotten a
9478: certificate from us).
9479:
9480: =item (Green) Successful local authentication
9481:
9482: A local connection successfully negotiated the encryption key.
9483: In this case the IDEA key is in a file (that is hopefully well protected).
9484:
9485: =item (Green) Successful ssl authentication with <client>
9486:
9487: The client (<client> is the peer's name in hosts.tab), has successfully
9488: negotiated an SSL connection with this child process.
9489:
9490: =item (Green) Successful insecure authentication with <client>
9491:
9492:
9493: The client has successfully negotiated an insecure connection withthe child process.
9494:
9495: =item (Yellow) Attempted insecure connection disallowed
9496:
9497: The client attempted and failed to successfully negotiate a successful insecure
9498: connection. This can happen either because the variable londAllowInsecure is false
9499: or undefined, or becuse the child did not successfully echo back the challenge
9500: string.
9501:
9502:
9503: =back
9504:
9505: =back
9506:
9507:
9508: =cut
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