1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.547 2018/08/09 14:07:40 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: 1.547 $'; #' 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; # Client allowed to host domain's users.
84: # (version constraints ignored), not set
85: # if this host and client share "internet domain".
86: my %clientprohibited; # Actions prohibited on client;
87:
88: my $server;
89:
90: my $keymode;
91:
92: my $cipher; # Cipher key negotiated with client
93: my $tmpsnum = 0; # Id of tmpputs.
94:
95: #
96: # Connection type is:
97: # client - All client actions are allowed
98: # manager - only management functions allowed.
99: # both - Both management and client actions are allowed
100: #
101:
102: my $ConnectionType;
103:
104: my %managers; # Ip -> manager names
105:
106: my %perlvar; # Will have the apache conf defined perl vars.
107:
108: my %secureconf; # Will have requirements for security
109: # of lond connections
110:
111: my %crlchecked; # Will contain clients for which the client's SSL
112: # has been checked against the cluster's Certificate
113: # Revocation List.
114:
115: my $dist;
116:
117: #
118: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
119: # Each element of the hash contains a reference to an array that contains:
120: # A reference to a sub that executes the request corresponding to the keyword.
121: # A flag that is true if the request must be encoded to be acceptable.
122: # A mask with bits as follows:
123: # CLIENT_OK - Set when the function is allowed by ordinary clients
124: # MANAGER_OK - Set when the function is allowed to manager clients.
125: #
126: my $CLIENT_OK = 1;
127: my $MANAGER_OK = 2;
128: my %Dispatcher;
129:
130:
131: #
132: # The array below are password error strings."
133: #
134: my $lastpwderror = 13; # Largest error number from lcpasswd.
135: my @passwderrors = ("ok",
136: "pwchange_failure - lcpasswd must be run as user 'www'",
137: "pwchange_failure - lcpasswd got incorrect number of arguments",
138: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
139: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
140: "pwchange_failure - lcpasswd User does not exist.",
141: "pwchange_failure - lcpasswd Incorrect current passwd",
142: "pwchange_failure - lcpasswd Unable to su to root.",
143: "pwchange_failure - lcpasswd Cannot set new passwd.",
144: "pwchange_failure - lcpasswd Username has invalid characters",
145: "pwchange_failure - lcpasswd Invalid characters in password",
146: "pwchange_failure - lcpasswd User already exists",
147: "pwchange_failure - lcpasswd Something went wrong with user addition.",
148: "pwchange_failure - lcpasswd Password mismatch",
149: "pwchange_failure - lcpasswd Error filename is invalid");
150:
151:
152: # This array are the errors from lcinstallfile:
153:
154: my @installerrors = ("ok",
155: "Initial user id of client not that of www",
156: "Usage error, not enough command line arguments",
157: "Source filename does not exist",
158: "Destination filename does not exist",
159: "Some file operation failed",
160: "Invalid table filename."
161: );
162:
163: #
164: # The %trust hash classifies commands according to type of trust
165: # required for execution of the command.
166: #
167: # When clients from a different institution request execution of a
168: # particular command, the trust settings for that institution set
169: # for this domain (or default domain for a multi-domain server) will
170: # be checked to see if running the command is allowed.
171: #
172: # Trust types which depend on the "Trust" domain configuration
173: # for the machine's default domain are:
174: #
175: # content ("Access to this domain's content by others")
176: # shared ("Access to other domain's content by this domain")
177: # enroll ("Enrollment in this domain's courses by others")
178: # coaurem ("Co-author roles for this domain's users elsewhere")
179: # domroles ("Domain roles in this domain assignable to others")
180: # catalog ("Course Catalog for this domain displayed elsewhere")
181: # reqcrs ("Requests for creation of courses in this domain by others")
182: # msg ("Users in other domains can send messages to this domain")
183: #
184: # Trust type which depends on the User Session Hosting (remote)
185: # domain configuration for machine's default domain is: "remote".
186: #
187: # Trust types which depend on contents of manager.tab in
188: # /home/httpd/lonTabs is: "manageronly".
189: #
190: # Trust type which requires client to share the same LON-CAPA
191: # "internet domain" (i.e., same institution as this server) is:
192: # "institutiononly".
193: #
194:
195: my %trust = (
196: auth => {remote => 1},
197: autocreatepassword => {remote => 1},
198: autocrsreqchecks => {remote => 1, reqcrs => 1},
199: autocrsrequpdate => {remote => 1},
200: autocrsreqvalidation => {remote => 1},
201: autogetsections => {remote => 1},
202: autoinstcodedefaults => {remote => 1, catalog => 1},
203: autoinstcodeformat => {remote => 1, catalog => 1},
204: autonewcourse => {remote => 1, reqcrs => 1},
205: autophotocheck => {remote => 1, enroll => 1},
206: autophotochoice => {remote => 1},
207: autophotopermission => {remote => 1, enroll => 1},
208: autopossibleinstcodes => {remote => 1, reqcrs => 1},
209: autoretrieve => {remote => 1, enroll => 1, catalog => 1},
210: autorun => {remote => 1, enroll => 1, reqcrs => 1},
211: autovalidateclass_sec => {catalog => 1},
212: autovalidatecourse => {remote => 1, enroll => 1},
213: autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1},
214: changeuserauth => {remote => 1, domroles => 1},
215: chatretr => {remote => 1, enroll => 1},
216: chatsend => {remote => 1, enroll => 1},
217: courseiddump => {remote => 1, domroles => 1, enroll => 1},
218: courseidput => {remote => 1, domroles => 1, enroll => 1},
219: courseidputhash => {remote => 1, domroles => 1, enroll => 1},
220: courselastaccess => {remote => 1, domroles => 1, enroll => 1},
221: currentauth => {remote => 1, domroles => 1, enroll => 1},
222: currentdump => {remote => 1, enroll => 1},
223: currentversion => {remote=> 1, content => 1},
224: dcmaildump => {remote => 1, domroles => 1},
225: dcmailput => {remote => 1, domroles => 1},
226: del => {remote => 1, domroles => 1, enroll => 1, content => 1},
227: deldom => {remote => 1, domroles => 1}, # not currently used
228: devalidatecache => {institutiononly => 1},
229: domroleput => {remote => 1, enroll => 1},
230: domrolesdump => {remote => 1, catalog => 1},
231: du => {remote => 1, enroll => 1},
232: du2 => {remote => 1, enroll => 1},
233: dump => {remote => 1, enroll => 1, domroles => 1},
234: edit => {institutiononly => 1}, #not used currently
235: eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
236: egetdom => {remote => 1, domroles => 1, enroll => 1, },
237: ekey => {}, #not used currently
238: exit => {anywhere => 1},
239: fetchuserfile => {remote => 1, enroll => 1},
240: get => {remote => 1, domroles => 1, enroll => 1},
241: getdom => {anywhere => 1},
242: home => {anywhere => 1},
243: iddel => {remote => 1, enroll => 1},
244: idget => {remote => 1, enroll => 1},
245: idput => {remote => 1, domroles => 1, enroll => 1},
246: inc => {remote => 1, enroll => 1},
247: init => {anywhere => 1},
248: inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
249: instemailrules => {remote => 1, domroles => 1},
250: instidrulecheck => {remote => 1, domroles => 1,},
251: instidrules => {remote => 1, domroles => 1,},
252: instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
253: instselfcreatecheck => {institutiononly => 1},
254: instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
255: keys => {remote => 1,},
256: load => {anywhere => 1},
257: log => {anywhere => 1},
258: ls => {remote => 1, enroll => 1, content => 1,},
259: ls2 => {remote => 1, enroll => 1, content => 1,},
260: ls3 => {remote => 1, enroll => 1, content => 1,},
261: makeuser => {remote => 1, enroll => 1, domroles => 1,},
262: mkdiruserfile => {remote => 1, enroll => 1,},
263: newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
264: passwd => {remote => 1},
265: ping => {anywhere => 1},
266: pong => {anywhere => 1},
267: pushfile => {manageronly => 1},
268: put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
269: putdom => {remote => 1, domroles => 1,},
270: putstore => {remote => 1, enroll => 1},
271: queryreply => {anywhere => 1},
272: querysend => {anywhere => 1},
273: querysend_activitylog => {remote => 1},
274: querysend_allusers => {remote => 1, domroles => 1},
275: querysend_courselog => {remote => 1},
276: querysend_fetchenrollment => {remote => 1},
277: querysend_getinstuser => {remote => 1},
278: querysend_getmultinstusers => {remote => 1},
279: querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1},
280: querysend_institutionalphotos => {remote => 1},
281: querysend_portfolio_metadata => {remote => 1, content => 1},
282: querysend_userlog => {remote => 1, domroles => 1},
283: querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1},
284: quit => {anywhere => 1},
285: readlonnetglobal => {institutiononly => 1},
286: reinit => {manageronly => 1}, #not used currently
287: removeuserfile => {remote => 1, enroll => 1},
288: renameuserfile => {remote => 1,},
289: restore => {remote => 1, enroll => 1, reqcrs => 1,},
290: rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
291: rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
292: servercerts => {institutiononly => 1},
293: serverdistarch => {anywhere => 1},
294: serverhomeID => {anywhere => 1},
295: serverloncaparev => {anywhere => 1},
296: servertimezone => {remote => 1, enroll => 1},
297: setannounce => {remote => 1, domroles => 1},
298: sethost => {anywhere => 1},
299: store => {remote => 1, enroll => 1, reqcrs => 1,},
300: studentphoto => {remote => 1, enroll => 1},
301: sub => {content => 1,},
302: tmpdel => {anywhere => 1},
303: tmpget => {anywhere => 1},
304: tmpput => {anywhere => 1},
305: tokenauthuserfile => {anywhere => 1},
306: unsub => {content => 1,},
307: update => {shared => 1},
308: updateclickers => {remote => 1},
309: userhassession => {anywhere => 1},
310: userload => {anywhere => 1},
311: version => {anywhere => 1}, #not used
312: );
313:
314: #
315: # Statistics that are maintained and dislayed in the status line.
316: #
317: my $Transactions = 0; # Number of attempted transactions.
318: my $Failures = 0; # Number of transcations failed.
319:
320: # ResetStatistics:
321: # Resets the statistics counters:
322: #
323: sub ResetStatistics {
324: $Transactions = 0;
325: $Failures = 0;
326: }
327:
328: #------------------------------------------------------------------------
329: #
330: # LocalConnection
331: # Completes the formation of a locally authenticated connection.
332: # This function will ensure that the 'remote' client is really the
333: # local host. If not, the connection is closed, and the function fails.
334: # If so, initcmd is parsed for the name of a file containing the
335: # IDEA session key. The fie is opened, read, deleted and the session
336: # key returned to the caller.
337: #
338: # Parameters:
339: # $Socket - Socket open on client.
340: # $initcmd - The full text of the init command.
341: #
342: # Returns:
343: # IDEA session key on success.
344: # undef on failure.
345: #
346: sub LocalConnection {
347: my ($Socket, $initcmd) = @_;
348: Debug("Attempting local connection: $initcmd client: $clientip");
349: if($clientip ne "127.0.0.1") {
350: &logthis('<font color="red"> LocalConnection rejecting non local: '
351: ."$clientip ne 127.0.0.1 </font>");
352: close $Socket;
353: return undef;
354: } else {
355: chomp($initcmd); # Get rid of \n in filename.
356: my ($init, $type, $name) = split(/:/, $initcmd);
357: Debug(" Init command: $init $type $name ");
358:
359: # Require that $init = init, and $type = local: Otherwise
360: # the caller is insane:
361:
362: if(($init ne "init") && ($type ne "local")) {
363: &logthis('<font color = "red"> LocalConnection: caller is insane! '
364: ."init = $init, and type = $type </font>");
365: close($Socket);;
366: return undef;
367:
368: }
369: # Now get the key filename:
370:
371: my $IDEAKey = lonlocal::ReadKeyFile($name);
372: return $IDEAKey;
373: }
374: }
375: #------------------------------------------------------------------------------
376: #
377: # SSLConnection
378: # Completes the formation of an ssh authenticated connection. The
379: # socket is promoted to an ssl socket. If this promotion and the associated
380: # certificate exchange are successful, the IDEA key is generated and sent
381: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
382: # the caller after the SSL tunnel is torn down.
383: #
384: # Parameters:
385: # Name Type Purpose
386: # $Socket IO::Socket::INET Plaintext socket.
387: #
388: # Returns:
389: # IDEA key on success.
390: # undef on failure.
391: #
392: sub SSLConnection {
393: my $Socket = shift;
394:
395: Debug("SSLConnection: ");
396: my $KeyFile = lonssl::KeyFile();
397: if(!$KeyFile) {
398: my $err = lonssl::LastError();
399: &logthis("<font color=\"red\"> CRITICAL"
400: ."Can't get key file $err </font>");
401: return undef;
402: }
403: my ($CACertificate,
404: $Certificate) = lonssl::CertificateFile();
405:
406:
407: # If any of the key, certificate or certificate authority
408: # certificate filenames are not defined, this can't work.
409:
410: if((!$Certificate) || (!$CACertificate)) {
411: my $err = lonssl::LastError();
412: &logthis("<font color=\"red\"> CRITICAL"
413: ."Can't get certificates: $err </font>");
414:
415: return undef;
416: }
417: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
418:
419: # Indicate to our peer that we can procede with
420: # a transition to ssl authentication:
421:
422: print $Socket "ok:ssl\n";
423:
424: Debug("Approving promotion -> ssl");
425: # And do so:
426:
427: my $CRLFile;
428: unless ($crlchecked{$clientname}) {
429: $CRLFile = lonssl::CRLFile();
430: $crlchecked{$clientname} = 1;
431: }
432:
433: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
434: $CACertificate,
435: $Certificate,
436: $KeyFile,
437: $clientname,
438: $CRLFile,
439: $clientversion);
440: if(! ($SSLSocket) ) { # SSL socket promotion failed.
441: my $err = lonssl::LastError();
442: &logthis("<font color=\"red\"> CRITICAL "
443: ."SSL Socket promotion failed: $err </font>");
444: return undef;
445: }
446: Debug("SSL Promotion successful");
447:
448: #
449: # The only thing we'll use the socket for is to send the IDEA key
450: # to the peer:
451:
452: my $Key = lonlocal::CreateCipherKey();
453: print $SSLSocket "$Key\n";
454:
455: lonssl::Close($SSLSocket);
456:
457: Debug("Key exchange complete: $Key");
458:
459: return $Key;
460: }
461: #
462: # InsecureConnection:
463: # If insecure connections are allowd,
464: # exchange a challenge with the client to 'validate' the
465: # client (not really, but that's the protocol):
466: # We produce a challenge string that's sent to the client.
467: # The client must then echo the challenge verbatim to us.
468: #
469: # Parameter:
470: # Socket - Socket open on the client.
471: # Returns:
472: # 1 - success.
473: # 0 - failure (e.g.mismatch or insecure not allowed).
474: #
475: sub InsecureConnection {
476: my $Socket = shift;
477:
478: # Don't even start if insecure connections are not allowed.
479: # return 0 if Insecure connections not allowed.
480: #
481: if (ref($secureconf{'connfrom'}) eq 'HASH') {
482: if ($clientsamedom) {
483: if ($secureconf{'connfrom'}{'dom'} eq 'req') {
484: return 0;
485: }
486: } elsif ($clientsameinst) {
487: if ($secureconf{'connfrom'}{'intdom'} eq 'req') {
488: return 0;
489: }
490: } else {
491: if ($secureconf{'connfrom'}{'other'} eq 'req') {
492: return 0;
493: }
494: }
495: } elsif (!$perlvar{londAllowInsecure}) {
496: return 0;
497: }
498:
499: # Fabricate a challenge string and send it..
500:
501: my $challenge = "$$".time; # pid + time.
502: print $Socket "$challenge\n";
503: &status("Waiting for challenge reply");
504:
505: my $answer = <$Socket>;
506: $answer =~s/\W//g;
507: if($challenge eq $answer) {
508: return 1;
509: } else {
510: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
511: &status("No challenge reqply");
512: return 0;
513: }
514:
515:
516: }
517: #
518: # Safely execute a command (as long as it's not a shel command and doesn
519: # not require/rely on shell escapes. The function operates by doing a
520: # a pipe based fork and capturing stdout and stderr from the pipe.
521: #
522: # Formal Parameters:
523: # $line - A line of text to be executed as a command.
524: # Returns:
525: # The output from that command. If the output is multiline the caller
526: # must know how to split up the output.
527: #
528: #
529: sub execute_command {
530: my ($line) = @_;
531: my @words = split(/\s/, $line); # Bust the command up into words.
532: my $output = "";
533:
534: my $pid = open(CHILD, "-|");
535:
536: if($pid) { # Parent process
537: Debug("In parent process for execute_command");
538: my @data = <CHILD>; # Read the child's outupt...
539: close CHILD;
540: foreach my $output_line (@data) {
541: Debug("Adding $output_line");
542: $output .= $output_line; # Presumably has a \n on it.
543: }
544:
545: } else { # Child process
546: close (STDERR);
547: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
548: exec(@words); # won't return.
549: }
550: return $output;
551: }
552:
553:
554: # GetCertificate: Given a transaction that requires a certificate,
555: # this function will extract the certificate from the transaction
556: # request. Note that at this point, the only concept of a certificate
557: # is the hostname to which we are connected.
558: #
559: # Parameter:
560: # request - The request sent by our client (this parameterization may
561: # need to change when we really use a certificate granting
562: # authority.
563: #
564: sub GetCertificate {
565: my $request = shift;
566:
567: return $clientip;
568: }
569:
570: #
571: # Return true if client is a manager.
572: #
573: sub isManager {
574: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
575: }
576: #
577: # Return tru if client can do client functions
578: #
579: sub isClient {
580: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
581: }
582:
583:
584: #
585: # ReadManagerTable: Reads in the current manager table. For now this is
586: # done on each manager authentication because:
587: # - These authentications are not frequent
588: # - This allows dynamic changes to the manager table
589: # without the need to signal to the lond.
590: #
591: sub ReadManagerTable {
592:
593: &Debug("Reading manager table");
594: # Clean out the old table first..
595:
596: foreach my $key (keys %managers) {
597: delete $managers{$key};
598: }
599:
600: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
601: if (!open (MANAGERS, $tablename)) {
602: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
603: if (&Apache::lonnet::is_LC_dns($hostname)) {
604: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
605: }
606: return;
607: }
608: while(my $host = <MANAGERS>) {
609: chomp($host);
610: if ($host =~ "^#") { # Comment line.
611: next;
612: }
613: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
614: # The entry is of the form:
615: # cluname:hostname
616: # cluname - A 'cluster hostname' is needed in order to negotiate
617: # the host key.
618: # hostname- The dns name of the host.
619: #
620: my($cluname, $dnsname) = split(/:/, $host);
621:
622: my $ip = gethostbyname($dnsname);
623: if(defined($ip)) { # bad names don't deserve entry.
624: my $hostip = inet_ntoa($ip);
625: $managers{$hostip} = $cluname;
626: logthis('<font color="green"> registering manager '.
627: "$dnsname as $cluname with $hostip </font>\n");
628: }
629: } else {
630: logthis('<font color="green"> existing host'." $host</font>\n");
631: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
632: }
633: }
634: }
635:
636: #
637: # ValidManager: Determines if a given certificate represents a valid manager.
638: # in this primitive implementation, the 'certificate' is
639: # just the connecting loncapa client name. This is checked
640: # against a valid client list in the configuration.
641: #
642: #
643: sub ValidManager {
644: my $certificate = shift;
645:
646: return isManager;
647: }
648: #
649: # CopyFile: Called as part of the process of installing a
650: # new configuration file. This function copies an existing
651: # file to a backup file.
652: # Parameters:
653: # oldfile - Name of the file to backup.
654: # newfile - Name of the backup file.
655: # Return:
656: # 0 - Failure (errno has failure reason).
657: # 1 - Success.
658: #
659: sub CopyFile {
660:
661: my ($oldfile, $newfile) = @_;
662:
663: if (! copy($oldfile,$newfile)) {
664: return 0;
665: }
666: chmod(0660, $newfile);
667: return 1;
668: }
669: #
670: # Host files are passed out with externally visible host IPs.
671: # If, for example, we are behind a fire-wall or NAT host, our
672: # internally visible IP may be different than the externally
673: # visible IP. Therefore, we always adjust the contents of the
674: # host file so that the entry for ME is the IP that we believe
675: # we have. At present, this is defined as the entry that
676: # DNS has for us. If by some chance we are not able to get a
677: # DNS translation for us, then we assume that the host.tab file
678: # is correct.
679: # BUGBUGBUG - in the future, we really should see if we can
680: # easily query the interface(s) instead.
681: # Parameter(s):
682: # contents - The contents of the host.tab to check.
683: # Returns:
684: # newcontents - The adjusted contents.
685: #
686: #
687: sub AdjustHostContents {
688: my $contents = shift;
689: my $adjusted;
690: my $me = $perlvar{'lonHostID'};
691:
692: foreach my $line (split(/\n/,$contents)) {
693: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
694: ($line =~ /^\s*\^/))) {
695: chomp($line);
696: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
697: if ($id eq $me) {
698: my $ip = gethostbyname($name);
699: my $ipnew = inet_ntoa($ip);
700: $ip = $ipnew;
701: # Reconstruct the host line and append to adjusted:
702:
703: my $newline = "$id:$domain:$role:$name:$ip";
704: if($maxcon ne "") { # Not all hosts have loncnew tuning params
705: $newline .= ":$maxcon:$idleto:$mincon";
706: }
707: $adjusted .= $newline."\n";
708:
709: } else { # Not me, pass unmodified.
710: $adjusted .= $line."\n";
711: }
712: } else { # Blank or comment never re-written.
713: $adjusted .= $line."\n"; # Pass blanks and comments as is.
714: }
715: }
716: return $adjusted;
717: }
718: #
719: # InstallFile: Called to install an administrative file:
720: # - The file is created int a temp directory called <name>.tmp
721: # - lcinstall file is called to install the file.
722: # since the web app has no direct write access to the table directory
723: #
724: # Parameters:
725: # Name of the file
726: # File Contents.
727: # Return:
728: # nonzero - success.
729: # 0 - failure and $! has an errno.
730: # Assumptions:
731: # File installtion is a relatively infrequent
732: #
733: sub InstallFile {
734:
735: my ($Filename, $Contents) = @_;
736: # my $TempFile = $Filename.".tmp";
737: my $exedir = $perlvar{'lonDaemons'};
738: my $tmpdir = $exedir.'/tmp/';
739: my $TempFile = $tmpdir."TempTableFile.tmp";
740:
741: # Open the file for write:
742:
743: my $fh = IO::File->new("> $TempFile"); # Write to temp.
744: if(!(defined $fh)) {
745: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
746: return 0;
747: }
748: # write the contents of the file:
749:
750: print $fh ($Contents);
751: $fh->close; # In case we ever have a filesystem w. locking
752:
753: chmod(0664, $TempFile); # Everyone can write it.
754:
755: # Use lcinstall file to put the file in the table directory...
756:
757: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
758: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
759: close $pf;
760: my $err = $?;
761: &Debug("Status is $err");
762: if ($err != 0) {
763: my $msg = $err;
764: if ($err < @installerrors) {
765: $msg = $installerrors[$err];
766: }
767: &logthis("Install failed for table file $Filename : $msg");
768: return 0;
769: }
770:
771: # Remove the temp file:
772:
773: unlink($TempFile);
774:
775: return 1;
776: }
777:
778:
779: #
780: # ConfigFileFromSelector: converts a configuration file selector
781: # into a configuration file pathname.
782: # Supports the following file selectors:
783: # hosts, domain, dns_hosts, dns_domain
784: #
785: #
786: # Parameters:
787: # selector - Configuration file selector.
788: # Returns:
789: # Full path to the file or undef if the selector is invalid.
790: #
791: sub ConfigFileFromSelector {
792: my $selector = shift;
793: my $tablefile;
794:
795: my $tabledir = $perlvar{'lonTabDir'}.'/';
796: if (($selector eq "hosts") || ($selector eq "domain") ||
797: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
798: $tablefile = $tabledir.$selector.'.tab';
799: }
800: return $tablefile;
801: }
802: #
803: # PushFile: Called to do an administrative push of a file.
804: # - Ensure the file being pushed is one we support.
805: # - Backup the old file to <filename.saved>
806: # - Separate the contents of the new file out from the
807: # rest of the request.
808: # - Write the new file.
809: # Parameter:
810: # Request - The entire user request. This consists of a : separated
811: # string pushfile:tablename:contents.
812: # NOTE: The contents may have :'s in it as well making things a bit
813: # more interesting... but not much.
814: # Returns:
815: # String to send to client ("ok" or "refused" if bad file).
816: #
817: sub PushFile {
818: my $request = shift;
819: my ($command, $filename, $contents) = split(":", $request, 3);
820: &Debug("PushFile");
821:
822: # At this point in time, pushes for only the following tables are
823: # supported:
824: # hosts.tab ($filename eq host).
825: # domain.tab ($filename eq domain).
826: # dns_hosts.tab ($filename eq dns_host).
827: # dns_domain.tab ($filename eq dns_domain).
828: # Construct the destination filename or reject the request.
829: #
830: # lonManage is supposed to ensure this, however this session could be
831: # part of some elaborate spoof that managed somehow to authenticate.
832: #
833:
834:
835: my $tablefile = ConfigFileFromSelector($filename);
836: if(! (defined $tablefile)) {
837: return "refused";
838: }
839:
840: # If the file being pushed is the host file, we adjust the entry for ourself so that the
841: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
842: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
843: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
844: # that possibilty.
845:
846: if($filename eq "host") {
847: $contents = AdjustHostContents($contents);
848: } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
849: if ($contents eq '') {
850: &logthis('<font color="red"> Pushfile: unable to install '
851: .$tablefile." - no data received from push. </font>");
852: return 'error: push had no data';
853: }
854: if (&Apache::lonnet::get_host_ip($clientname)) {
855: my $clienthost = &Apache::lonnet::hostname($clientname);
856: if ($managers{$clientip} eq $clientname) {
857: my $clientprotocol = $Apache::lonnet::protocol{$clientname};
858: $clientprotocol = 'http' if ($clientprotocol ne 'https');
859: my $url = '/adm/'.$filename;
860: $url =~ s{_}{/};
861: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
862: my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
863: if ($response->is_error()) {
864: &logthis('<font color="red"> Pushfile: unable to install '
865: .$tablefile." - error attempting to pull data. </font>");
866: return 'error: pull failed';
867: } else {
868: my $result = $response->content;
869: chomp($result);
870: unless ($result eq $contents) {
871: &logthis('<font color="red"> Pushfile: unable to install '
872: .$tablefile." - pushed data and pulled data differ. </font>");
873: my $pushleng = length($contents);
874: my $pullleng = length($result);
875: if ($pushleng != $pullleng) {
876: return "error: $pushleng vs $pullleng bytes";
877: } else {
878: return "error: mismatch push and pull";
879: }
880: }
881: }
882: }
883: }
884: }
885:
886: # Install the new file:
887:
888: &logthis("Installing new $tablefile contents:\n$contents");
889: if(!InstallFile($tablefile, $contents)) {
890: &logthis('<font color="red"> Pushfile: unable to install '
891: .$tablefile." $! </font>");
892: return "error:$!";
893: } else {
894: &logthis('<font color="green"> Installed new '.$tablefile
895: ." - transaction by: $clientname ($clientip)</font>");
896: my $adminmail = $perlvar{'lonAdmEMail'};
897: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
898: if ($admindom ne '') {
899: my %domconfig =
900: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
901: if (ref($domconfig{'contacts'}) eq 'HASH') {
902: if ($domconfig{'contacts'}{'adminemail'} ne '') {
903: $adminmail = $domconfig{'contacts'}{'adminemail'};
904: }
905: }
906: }
907: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
908: my $msg = new Mail::Send;
909: $msg->to($adminmail);
910: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
911: $msg->add('Content-type','text/plain; charset=UTF-8');
912: if (my $fh = $msg->open()) {
913: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
914: "$clientname ($clientip)\n";
915: $fh->close;
916: }
917: }
918: }
919:
920: # Indicate success:
921:
922: return "ok";
923:
924: }
925:
926: #
927: # Called to re-init either lonc or lond.
928: #
929: # Parameters:
930: # request - The full request by the client. This is of the form
931: # reinit:<process>
932: # where <process> is allowed to be either of
933: # lonc or lond
934: #
935: # Returns:
936: # The string to be sent back to the client either:
937: # ok - Everything worked just fine.
938: # error:why - There was a failure and why describes the reason.
939: #
940: #
941: sub ReinitProcess {
942: my $request = shift;
943:
944:
945: # separate the request (reinit) from the process identifier and
946: # validate it producing the name of the .pid file for the process.
947: #
948: #
949: my ($junk, $process) = split(":", $request);
950: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
951: if($process eq 'lonc') {
952: $processpidfile = $processpidfile."lonc.pid";
953: if (!open(PIDFILE, "< $processpidfile")) {
954: return "error:Open failed for $processpidfile";
955: }
956: my $loncpid = <PIDFILE>;
957: close(PIDFILE);
958: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
959: ."</font>");
960: kill("USR2", $loncpid);
961: } elsif ($process eq 'lond') {
962: logthis('<font color="red"> Reinitializing self (lond) </font>');
963: &UpdateHosts; # Lond is us!!
964: } else {
965: &logthis('<font color="yellow" Invalid reinit request for '.$process
966: ."</font>");
967: return "error:Invalid process identifier $process";
968: }
969: return 'ok';
970: }
971: # Validate a line in a configuration file edit script:
972: # Validation includes:
973: # - Ensuring the command is valid.
974: # - Ensuring the command has sufficient parameters
975: # Parameters:
976: # scriptline - A line to validate (\n has been stripped for what it's worth).
977: #
978: # Return:
979: # 0 - Invalid scriptline.
980: # 1 - Valid scriptline
981: # NOTE:
982: # Only the command syntax is checked, not the executability of the
983: # command.
984: #
985: sub isValidEditCommand {
986: my $scriptline = shift;
987:
988: # Line elements are pipe separated:
989:
990: my ($command, $key, $newline) = split(/\|/, $scriptline);
991: &logthis('<font color="green"> isValideditCommand checking: '.
992: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
993:
994: if ($command eq "delete") {
995: #
996: # key with no newline.
997: #
998: if( ($key eq "") || ($newline ne "")) {
999: return 0; # Must have key but no newline.
1000: } else {
1001: return 1; # Valid syntax.
1002: }
1003: } elsif ($command eq "replace") {
1004: #
1005: # key and newline:
1006: #
1007: if (($key eq "") || ($newline eq "")) {
1008: return 0;
1009: } else {
1010: return 1;
1011: }
1012: } elsif ($command eq "append") {
1013: if (($key ne "") && ($newline eq "")) {
1014: return 1;
1015: } else {
1016: return 0;
1017: }
1018: } else {
1019: return 0; # Invalid command.
1020: }
1021: return 0; # Should not get here!!!
1022: }
1023: #
1024: # ApplyEdit - Applies an edit command to a line in a configuration
1025: # file. It is the caller's responsiblity to validate the
1026: # edit line.
1027: # Parameters:
1028: # $directive - A single edit directive to apply.
1029: # Edit directives are of the form:
1030: # append|newline - Appends a new line to the file.
1031: # replace|key|newline - Replaces the line with key value 'key'
1032: # delete|key - Deletes the line with key value 'key'.
1033: # $editor - A config file editor object that contains the
1034: # file being edited.
1035: #
1036: sub ApplyEdit {
1037:
1038: my ($directive, $editor) = @_;
1039:
1040: # Break the directive down into its command and its parameters
1041: # (at most two at this point. The meaning of the parameters, if in fact
1042: # they exist depends on the command).
1043:
1044: my ($command, $p1, $p2) = split(/\|/, $directive);
1045:
1046: if($command eq "append") {
1047: $editor->Append($p1); # p1 - key p2 null.
1048: } elsif ($command eq "replace") {
1049: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
1050: } elsif ($command eq "delete") {
1051: $editor->DeleteLine($p1); # p1 - key p2 null.
1052: } else { # Should not get here!!!
1053: die "Invalid command given to ApplyEdit $command"
1054: }
1055: }
1056: #
1057: # AdjustOurHost:
1058: # Adjusts a host file stored in a configuration file editor object
1059: # for the true IP address of this host. This is necessary for hosts
1060: # that live behind a firewall.
1061: # Those hosts have a publicly distributed IP of the firewall, but
1062: # internally must use their actual IP. We assume that a given
1063: # host only has a single IP interface for now.
1064: # Formal Parameters:
1065: # editor - The configuration file editor to adjust. This
1066: # editor is assumed to contain a hosts.tab file.
1067: # Strategy:
1068: # - Figure out our hostname.
1069: # - Lookup the entry for this host.
1070: # - Modify the line to contain our IP
1071: # - Do a replace for this host.
1072: sub AdjustOurHost {
1073: my $editor = shift;
1074:
1075: # figure out who I am.
1076:
1077: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
1078:
1079: # Get my host file entry.
1080:
1081: my $ConfigLine = $editor->Find($myHostName);
1082: if(! (defined $ConfigLine)) {
1083: die "AdjustOurHost - no entry for me in hosts file $myHostName";
1084: }
1085: # figure out my IP:
1086: # Use the config line to get my hostname.
1087: # Use gethostbyname to translate that into an IP address.
1088: #
1089: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1090: #
1091: # Reassemble the config line from the elements in the list.
1092: # Note that if the loncnew items were not present before, they will
1093: # be now even if they would be empty
1094: #
1095: my $newConfigLine = $id;
1096: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1097: $newConfigLine .= ":".$item;
1098: }
1099: # Replace the line:
1100:
1101: $editor->ReplaceLine($id, $newConfigLine);
1102:
1103: }
1104: #
1105: # ReplaceConfigFile:
1106: # Replaces a configuration file with the contents of a
1107: # configuration file editor object.
1108: # This is done by:
1109: # - Copying the target file to <filename>.old
1110: # - Writing the new file to <filename>.tmp
1111: # - Moving <filename.tmp> -> <filename>
1112: # This laborious process ensures that the system is never without
1113: # a configuration file that's at least valid (even if the contents
1114: # may be dated).
1115: # Parameters:
1116: # filename - Name of the file to modify... this is a full path.
1117: # editor - Editor containing the file.
1118: #
1119: sub ReplaceConfigFile {
1120:
1121: my ($filename, $editor) = @_;
1122:
1123: CopyFile ($filename, $filename.".old");
1124:
1125: my $contents = $editor->Get(); # Get the contents of the file.
1126:
1127: InstallFile($filename, $contents);
1128: }
1129: #
1130: #
1131: # Called to edit a configuration table file
1132: # Parameters:
1133: # request - The entire command/request sent by lonc or lonManage
1134: # Return:
1135: # The reply to send to the client.
1136: #
1137: sub EditFile {
1138: my $request = shift;
1139:
1140: # Split the command into it's pieces: edit:filetype:script
1141:
1142: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1143:
1144: # Check the pre-coditions for success:
1145:
1146: if($cmd != "edit") { # Something is amiss afoot alack.
1147: return "error:edit request detected, but request != 'edit'\n";
1148: }
1149: if( ($filetype ne "hosts") &&
1150: ($filetype ne "domain")) {
1151: return "error:edit requested with invalid file specifier: $filetype \n";
1152: }
1153:
1154: # Split the edit script and check it's validity.
1155:
1156: my @scriptlines = split(/\n/, $script); # one line per element.
1157: my $linecount = scalar(@scriptlines);
1158: for(my $i = 0; $i < $linecount; $i++) {
1159: chomp($scriptlines[$i]);
1160: if(!isValidEditCommand($scriptlines[$i])) {
1161: return "error:edit with bad script line: '$scriptlines[$i]' \n";
1162: }
1163: }
1164:
1165: # Execute the edit operation.
1166: # - Create a config file editor for the appropriate file and
1167: # - execute each command in the script:
1168: #
1169: my $configfile = ConfigFileFromSelector($filetype);
1170: if (!(defined $configfile)) {
1171: return "refused\n";
1172: }
1173: my $editor = ConfigFileEdit->new($configfile);
1174:
1175: for (my $i = 0; $i < $linecount; $i++) {
1176: ApplyEdit($scriptlines[$i], $editor);
1177: }
1178: # If the file is the host file, ensure that our host is
1179: # adjusted to have our ip:
1180: #
1181: if($filetype eq "host") {
1182: AdjustOurHost($editor);
1183: }
1184: # Finally replace the current file with our file.
1185: #
1186: ReplaceConfigFile($configfile, $editor);
1187:
1188: return "ok\n";
1189: }
1190:
1191: # read_profile
1192: #
1193: # Returns a set of specific entries from a user's profile file.
1194: # this is a utility function that is used by both get_profile_entry and
1195: # get_profile_entry_encrypted.
1196: #
1197: # Parameters:
1198: # udom - Domain in which the user exists.
1199: # uname - User's account name (loncapa account)
1200: # namespace - The profile namespace to open.
1201: # what - A set of & separated queries.
1202: # Returns:
1203: # If all ok: - The string that needs to be shipped back to the user.
1204: # If failure - A string that starts with error: followed by the failure
1205: # reason.. note that this probabyl gets shipped back to the
1206: # user as well.
1207: #
1208: sub read_profile {
1209: my ($udom, $uname, $namespace, $what) = @_;
1210:
1211: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1212: &GDBM_READER());
1213: if ($hashref) {
1214: my @queries=split(/\&/,$what);
1215: if ($namespace eq 'roles') {
1216: @queries = map { &unescape($_); } @queries;
1217: }
1218: my $qresult='';
1219:
1220: for (my $i=0;$i<=$#queries;$i++) {
1221: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1222: }
1223: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1224: if (&untie_user_hash($hashref)) {
1225: return $qresult;
1226: } else {
1227: return "error: ".($!+0)." untie (GDBM) Failed";
1228: }
1229: } else {
1230: if ($!+0 == 2) {
1231: return "error:No such file or GDBM reported bad block error";
1232: } else {
1233: return "error: ".($!+0)." tie (GDBM) Failed";
1234: }
1235: }
1236:
1237: }
1238: #--------------------- Request Handlers --------------------------------------------
1239: #
1240: # By convention each request handler registers itself prior to the sub
1241: # declaration:
1242: #
1243:
1244: #++
1245: #
1246: # Handles ping requests.
1247: # Parameters:
1248: # $cmd - the actual keyword that invoked us.
1249: # $tail - the tail of the request that invoked us.
1250: # $replyfd- File descriptor connected to the client
1251: # Implicit Inputs:
1252: # $currenthostid - Global variable that carries the name of the host we are
1253: # known as.
1254: # Returns:
1255: # 1 - Ok to continue processing.
1256: # 0 - Program should exit.
1257: # Side effects:
1258: # Reply information is sent to the client.
1259: sub ping_handler {
1260: my ($cmd, $tail, $client) = @_;
1261: Debug("$cmd $tail $client .. $currenthostid:");
1262:
1263: Reply( $client,\$currenthostid,"$cmd:$tail");
1264:
1265: return 1;
1266: }
1267: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1268:
1269: #++
1270: #
1271: # Handles pong requests. Pong replies with our current host id, and
1272: # the results of a ping sent to us via our lonc.
1273: #
1274: # Parameters:
1275: # $cmd - the actual keyword that invoked us.
1276: # $tail - the tail of the request that invoked us.
1277: # $replyfd- File descriptor connected to the client
1278: # Implicit Inputs:
1279: # $currenthostid - Global variable that carries the name of the host we are
1280: # connected to.
1281: # Returns:
1282: # 1 - Ok to continue processing.
1283: # 0 - Program should exit.
1284: # Side effects:
1285: # Reply information is sent to the client.
1286: sub pong_handler {
1287: my ($cmd, $tail, $replyfd) = @_;
1288:
1289: my $reply=&Apache::lonnet::reply("ping",$clientname);
1290: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1291: return 1;
1292: }
1293: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1294:
1295: #++
1296: # Called to establish an encrypted session key with the remote client.
1297: # Note that with secure lond, in most cases this function is never
1298: # invoked. Instead, the secure session key is established either
1299: # via a local file that's locked down tight and only lives for a short
1300: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1301: # bits from /dev/urandom, rather than the predictable pattern used by
1302: # by this sub. This sub is only used in the old-style insecure
1303: # key negotiation.
1304: # Parameters:
1305: # $cmd - the actual keyword that invoked us.
1306: # $tail - the tail of the request that invoked us.
1307: # $replyfd- File descriptor connected to the client
1308: # Implicit Inputs:
1309: # $currenthostid - Global variable that carries the name of the host
1310: # known as.
1311: # $clientname - Global variable that carries the name of the host we're connected to.
1312: # Returns:
1313: # 1 - Ok to continue processing.
1314: # 0 - Program should exit.
1315: # Implicit Outputs:
1316: # Reply information is sent to the client.
1317: # $cipher is set with a reference to a new IDEA encryption object.
1318: #
1319: sub establish_key_handler {
1320: my ($cmd, $tail, $replyfd) = @_;
1321:
1322: my $buildkey=time.$$.int(rand 100000);
1323: $buildkey=~tr/1-6/A-F/;
1324: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1325: my $key=$currenthostid.$clientname;
1326: $key=~tr/a-z/A-Z/;
1327: $key=~tr/G-P/0-9/;
1328: $key=~tr/Q-Z/0-9/;
1329: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1330: $key=substr($key,0,32);
1331: my $cipherkey=pack("H32",$key);
1332: $cipher=new IDEA $cipherkey;
1333: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1334:
1335: return 1;
1336:
1337: }
1338: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1339:
1340: # Handler for the load command. Returns the current system load average
1341: # to the requestor.
1342: #
1343: # Parameters:
1344: # $cmd - the actual keyword that invoked us.
1345: # $tail - the tail of the request that invoked us.
1346: # $replyfd- File descriptor connected to the client
1347: # Implicit Inputs:
1348: # $currenthostid - Global variable that carries the name of the host
1349: # known as.
1350: # $clientname - Global variable that carries the name of the host we're connected to.
1351: # Returns:
1352: # 1 - Ok to continue processing.
1353: # 0 - Program should exit.
1354: # Side effects:
1355: # Reply information is sent to the client.
1356: sub load_handler {
1357: my ($cmd, $tail, $replyfd) = @_;
1358:
1359:
1360:
1361: # Get the load average from /proc/loadavg and calculate it as a percentage of
1362: # the allowed load limit as set by the perl global variable lonLoadLim
1363:
1364: my $loadavg;
1365: my $loadfile=IO::File->new('/proc/loadavg');
1366:
1367: $loadavg=<$loadfile>;
1368: $loadavg =~ s/\s.*//g; # Extract the first field only.
1369:
1370: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1371:
1372: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1373:
1374: return 1;
1375: }
1376: ®ister_handler("load", \&load_handler, 0, 1, 0);
1377:
1378: #
1379: # Process the userload request. This sub returns to the client the current
1380: # user load average. It can be invoked either by clients or managers.
1381: #
1382: # Parameters:
1383: # $cmd - the actual keyword that invoked us.
1384: # $tail - the tail of the request that invoked us.
1385: # $replyfd- File descriptor connected to the client
1386: # Implicit Inputs:
1387: # $currenthostid - Global variable that carries the name of the host
1388: # known as.
1389: # $clientname - Global variable that carries the name of the host we're connected to.
1390: # Returns:
1391: # 1 - Ok to continue processing.
1392: # 0 - Program should exit
1393: # Implicit inputs:
1394: # whatever the userload() function requires.
1395: # Implicit outputs:
1396: # the reply is written to the client.
1397: #
1398: sub user_load_handler {
1399: my ($cmd, $tail, $replyfd) = @_;
1400:
1401: my $userloadpercent=&Apache::lonnet::userload();
1402: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1403:
1404: return 1;
1405: }
1406: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1407:
1408: # Process a request for the authorization type of a user:
1409: # (userauth).
1410: #
1411: # Parameters:
1412: # $cmd - the actual keyword that invoked us.
1413: # $tail - the tail of the request that invoked us.
1414: # $replyfd- File descriptor connected to the client
1415: # Returns:
1416: # 1 - Ok to continue processing.
1417: # 0 - Program should exit
1418: # Implicit outputs:
1419: # The user authorization type is written to the client.
1420: #
1421: sub user_authorization_type {
1422: my ($cmd, $tail, $replyfd) = @_;
1423:
1424: my $userinput = "$cmd:$tail";
1425:
1426: # Pull the domain and username out of the command tail.
1427: # and call get_auth_type to determine the authentication type.
1428:
1429: my ($udom,$uname)=split(/:/,$tail);
1430: my $result = &get_auth_type($udom, $uname);
1431: if($result eq "nouser") {
1432: &Failure( $replyfd, "unknown_user\n", $userinput);
1433: } else {
1434: #
1435: # We only want to pass the second field from get_auth_type
1436: # for ^krb.. otherwise we'll be handing out the encrypted
1437: # password for internals e.g.
1438: #
1439: my ($type,$otherinfo) = split(/:/,$result);
1440: if($type =~ /^krb/) {
1441: $type = $result;
1442: } else {
1443: $type .= ':';
1444: }
1445: &Reply( $replyfd, \$type, $userinput);
1446: }
1447:
1448: return 1;
1449: }
1450: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1451:
1452: # Process a request by a manager to push a hosts or domain table
1453: # to us. We pick apart the command and pass it on to the subs
1454: # that already exist to do this.
1455: #
1456: # Parameters:
1457: # $cmd - the actual keyword that invoked us.
1458: # $tail - the tail of the request that invoked us.
1459: # $client - File descriptor connected to the client
1460: # Returns:
1461: # 1 - Ok to continue processing.
1462: # 0 - Program should exit
1463: # Implicit Output:
1464: # a reply is written to the client.
1465: sub push_file_handler {
1466: my ($cmd, $tail, $client) = @_;
1467: &Debug("In push file handler");
1468: my $userinput = "$cmd:$tail";
1469:
1470: # At this time we only know that the IP of our partner is a valid manager
1471: # the code below is a hook to do further authentication (e.g. to resolve
1472: # spoofing).
1473:
1474: my $cert = &GetCertificate($userinput);
1475: if(&ValidManager($cert)) {
1476: &Debug("Valid manager: $client");
1477:
1478: # Now presumably we have the bona fides of both the peer host and the
1479: # process making the request.
1480:
1481: my $reply = &PushFile($userinput);
1482: &Reply($client, \$reply, $userinput);
1483:
1484: } else {
1485: &logthis("push_file_handler $client is not valid");
1486: &Failure( $client, "refused\n", $userinput);
1487: }
1488: return 1;
1489: }
1490: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1491:
1492: # The du_handler routine should be considered obsolete and is retained
1493: # for communication with legacy servers. Please see the du2_handler.
1494: #
1495: # du - list the disk usage of a directory recursively.
1496: #
1497: # note: stolen code from the ls file handler
1498: # under construction by Rick Banghart
1499: # .
1500: # Parameters:
1501: # $cmd - The command that dispatched us (du).
1502: # $ududir - The directory path to list... I'm not sure what this
1503: # is relative as things like ls:. return e.g.
1504: # no_such_dir.
1505: # $client - Socket open on the client.
1506: # Returns:
1507: # 1 - indicating that the daemon should not disconnect.
1508: # Side Effects:
1509: # The reply is written to $client.
1510: #
1511: sub du_handler {
1512: my ($cmd, $ududir, $client) = @_;
1513: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1514: my $userinput = "$cmd:$ududir";
1515:
1516: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1517: &Failure($client,"refused\n","$cmd:$ududir");
1518: return 1;
1519: }
1520: # Since $ududir could have some nasties in it,
1521: # we will require that ududir is a valid
1522: # directory. Just in case someone tries to
1523: # slip us a line like .;(cd /home/httpd rm -rf*)
1524: # etc.
1525: #
1526: if (-d $ududir) {
1527: my $total_size=0;
1528: my $code=sub {
1529: if ($_=~/\.\d+\./) { return;}
1530: if ($_=~/\.meta$/) { return;}
1531: if (-d $_) { return;}
1532: $total_size+=(stat($_))[7];
1533: };
1534: chdir($ududir);
1535: find($code,$ududir);
1536: $total_size=int($total_size/1024);
1537: &Reply($client,\$total_size,"$cmd:$ududir");
1538: } else {
1539: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1540: }
1541: return 1;
1542: }
1543: ®ister_handler("du", \&du_handler, 0, 1, 0);
1544:
1545: # Please also see the du_handler, which is obsoleted by du2.
1546: # du2_handler differs from du_handler in that required path to directory
1547: # provided by &propath() is prepended in the handler instead of on the
1548: # client side.
1549: #
1550: # du2 - list the disk usage of a directory recursively.
1551: #
1552: # Parameters:
1553: # $cmd - The command that dispatched us (du).
1554: # $tail - The tail of the request that invoked us.
1555: # $tail is a : separated list of the following:
1556: # - $ududir - directory path to list (before prepending)
1557: # - $getpropath = 1 if &propath() should prepend
1558: # - $uname - username to use for &propath or user dir
1559: # - $udom - domain to use for &propath or user dir
1560: # All are escaped.
1561: # $client - Socket open on the client.
1562: # Returns:
1563: # 1 - indicating that the daemon should not disconnect.
1564: # Side Effects:
1565: # The reply is written to $client.
1566: #
1567:
1568: sub du2_handler {
1569: my ($cmd, $tail, $client) = @_;
1570: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1571: my $userinput = "$cmd:$tail";
1572: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1573: &Failure($client,"refused\n","$cmd:$tail");
1574: return 1;
1575: }
1576: if ($getpropath) {
1577: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1578: $ududir = &propath($udom,$uname).'/'.$ududir;
1579: } else {
1580: &Failure($client,"refused\n","$cmd:$tail");
1581: return 1;
1582: }
1583: }
1584: # Since $ududir could have some nasties in it,
1585: # we will require that ududir is a valid
1586: # directory. Just in case someone tries to
1587: # slip us a line like .;(cd /home/httpd rm -rf*)
1588: # etc.
1589: #
1590: if (-d $ududir) {
1591: my $total_size=0;
1592: my $code=sub {
1593: if ($_=~/\.\d+\./) { return;}
1594: if ($_=~/\.meta$/) { return;}
1595: if (-d $_) { return;}
1596: $total_size+=(stat($_))[7];
1597: };
1598: chdir($ududir);
1599: find($code,$ududir);
1600: $total_size=int($total_size/1024);
1601: &Reply($client,\$total_size,"$cmd:$ududir");
1602: } else {
1603: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1604: }
1605: return 1;
1606: }
1607: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1608:
1609: #
1610: # The ls_handler routine should be considered obsolete and is retained
1611: # for communication with legacy servers. Please see the ls3_handler.
1612: #
1613: # ls - list the contents of a directory. For each file in the
1614: # selected directory the filename followed by the full output of
1615: # the stat function is returned. The returned info for each
1616: # file are separated by ':'. The stat fields are separated by &'s.
1617: #
1618: # If the requested path contains /../ or is:
1619: #
1620: # 1. for a directory, and the path does not begin with one of:
1621: # (a) /home/httpd/html/res/<domain>
1622: # (b) /home/httpd/html/userfiles/
1623: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1624: # or is:
1625: #
1626: # 2. for a file, and the path (after prepending) does not begin with one of:
1627: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1628: # (b) /home/httpd/html/res/<domain>/<username>/
1629: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1630: #
1631: # the response will be "refused".
1632: #
1633: # Parameters:
1634: # $cmd - The command that dispatched us (ls).
1635: # $ulsdir - The directory path to list... I'm not sure what this
1636: # is relative as things like ls:. return e.g.
1637: # no_such_dir.
1638: # $client - Socket open on the client.
1639: # Returns:
1640: # 1 - indicating that the daemon should not disconnect.
1641: # Side Effects:
1642: # The reply is written to $client.
1643: #
1644: sub ls_handler {
1645: # obsoleted by ls2_handler
1646: my ($cmd, $ulsdir, $client) = @_;
1647:
1648: my $userinput = "$cmd:$ulsdir";
1649:
1650: my $obs;
1651: my $rights;
1652: my $ulsout='';
1653: my $ulsfn;
1654: if ($ulsdir =~m{/\.\./}) {
1655: &Failure($client,"refused\n",$userinput);
1656: return 1;
1657: }
1658: if (-e $ulsdir) {
1659: if(-d $ulsdir) {
1660: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1661: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1662: &Failure($client,"refused\n",$userinput);
1663: return 1;
1664: }
1665: if (opendir(LSDIR,$ulsdir)) {
1666: while ($ulsfn=readdir(LSDIR)) {
1667: undef($obs);
1668: undef($rights);
1669: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1670: #We do some obsolete checking here
1671: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1672: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1673: my @obsolete=<FILE>;
1674: foreach my $obsolete (@obsolete) {
1675: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1676: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1677: }
1678: }
1679: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1680: if($obs eq '1') { $ulsout.="&1"; }
1681: else { $ulsout.="&0"; }
1682: if($rights eq '1') { $ulsout.="&1:"; }
1683: else { $ulsout.="&0:"; }
1684: }
1685: closedir(LSDIR);
1686: }
1687: } else {
1688: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1689: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1690: &Failure($client,"refused\n",$userinput);
1691: return 1;
1692: }
1693: my @ulsstats=stat($ulsdir);
1694: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1695: }
1696: } else {
1697: $ulsout='no_such_dir';
1698: }
1699: if ($ulsout eq '') { $ulsout='empty'; }
1700: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1701:
1702: return 1;
1703:
1704: }
1705: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1706:
1707: # The ls2_handler routine should be considered obsolete and is retained
1708: # for communication with legacy servers. Please see the ls3_handler.
1709: # Please also see the ls_handler, which was itself obsoleted by ls2.
1710: # ls2_handler differs from ls_handler in that it escapes its return
1711: # values before concatenating them together with ':'s.
1712: #
1713: # ls2 - list the contents of a directory. For each file in the
1714: # selected directory the filename followed by the full output of
1715: # the stat function is returned. The returned info for each
1716: # file are separated by ':'. The stat fields are separated by &'s.
1717: #
1718: # If the requested path contains /../ or is:
1719: #
1720: # 1. for a directory, and the path does not begin with one of:
1721: # (a) /home/httpd/html/res/<domain>
1722: # (b) /home/httpd/html/userfiles/
1723: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1724: # or is:
1725: #
1726: # 2. for a file, and the path (after prepending) does not begin with one of:
1727: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1728: # (b) /home/httpd/html/res/<domain>/<username>/
1729: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1730: #
1731: # the response will be "refused".
1732: #
1733: # Parameters:
1734: # $cmd - The command that dispatched us (ls).
1735: # $ulsdir - The directory path to list... I'm not sure what this
1736: # is relative as things like ls:. return e.g.
1737: # no_such_dir.
1738: # $client - Socket open on the client.
1739: # Returns:
1740: # 1 - indicating that the daemon should not disconnect.
1741: # Side Effects:
1742: # The reply is written to $client.
1743: #
1744: sub ls2_handler {
1745: my ($cmd, $ulsdir, $client) = @_;
1746:
1747: my $userinput = "$cmd:$ulsdir";
1748:
1749: my $obs;
1750: my $rights;
1751: my $ulsout='';
1752: my $ulsfn;
1753: if ($ulsdir =~m{/\.\./}) {
1754: &Failure($client,"refused\n",$userinput);
1755: return 1;
1756: }
1757: if (-e $ulsdir) {
1758: if(-d $ulsdir) {
1759: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1760: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1761: &Failure($client,"refused\n","$userinput");
1762: return 1;
1763: }
1764: if (opendir(LSDIR,$ulsdir)) {
1765: while ($ulsfn=readdir(LSDIR)) {
1766: undef($obs);
1767: undef($rights);
1768: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1769: #We do some obsolete checking here
1770: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1771: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1772: my @obsolete=<FILE>;
1773: foreach my $obsolete (@obsolete) {
1774: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1775: if($obsolete =~ m|(<copyright>)(default)|) {
1776: $rights = 1;
1777: }
1778: }
1779: }
1780: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1781: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1782: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1783: $ulsout.= &escape($tmp).':';
1784: }
1785: closedir(LSDIR);
1786: }
1787: } else {
1788: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1789: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1790: &Failure($client,"refused\n",$userinput);
1791: return 1;
1792: }
1793: my @ulsstats=stat($ulsdir);
1794: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1795: }
1796: } else {
1797: $ulsout='no_such_dir';
1798: }
1799: if ($ulsout eq '') { $ulsout='empty'; }
1800: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1801: return 1;
1802: }
1803: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1804: #
1805: # ls3 - list the contents of a directory. For each file in the
1806: # selected directory the filename followed by the full output of
1807: # the stat function is returned. The returned info for each
1808: # file are separated by ':'. The stat fields are separated by &'s.
1809: #
1810: # If the requested path (after prepending) contains /../ or is:
1811: #
1812: # 1. for a directory, and the path does not begin with one of:
1813: # (a) /home/httpd/html/res/<domain>
1814: # (b) /home/httpd/html/userfiles/
1815: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1816: # (d) /home/httpd/html/priv/<domain> and client is the homeserver
1817: #
1818: # or is:
1819: #
1820: # 2. for a file, and the path (after prepending) does not begin with one of:
1821: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1822: # (b) /home/httpd/html/res/<domain>/<username>/
1823: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1824: # (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver
1825: #
1826: # the response will be "refused".
1827: #
1828: # Parameters:
1829: # $cmd - The command that dispatched us (ls).
1830: # $tail - The tail of the request that invoked us.
1831: # $tail is a : separated list of the following:
1832: # - $ulsdir - directory path to list (before prepending)
1833: # - $getpropath = 1 if &propath() should prepend
1834: # - $getuserdir = 1 if path to user dir in lonUsers should
1835: # prepend
1836: # - $alternate_root - path to prepend
1837: # - $uname - username to use for &propath or user dir
1838: # - $udom - domain to use for &propath or user dir
1839: # All of these except $getpropath and &getuserdir are escaped.
1840: # no_such_dir.
1841: # $client - Socket open on the client.
1842: # Returns:
1843: # 1 - indicating that the daemon should not disconnect.
1844: # Side Effects:
1845: # The reply is written to $client.
1846: #
1847:
1848: sub ls3_handler {
1849: my ($cmd, $tail, $client) = @_;
1850: my $userinput = "$cmd:$tail";
1851: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1852: split(/:/,$tail);
1853: if (defined($ulsdir)) {
1854: $ulsdir = &unescape($ulsdir);
1855: }
1856: if (defined($alternate_root)) {
1857: $alternate_root = &unescape($alternate_root);
1858: }
1859: if (defined($uname)) {
1860: $uname = &unescape($uname);
1861: }
1862: if (defined($udom)) {
1863: $udom = &unescape($udom);
1864: }
1865:
1866: my $dir_root = $perlvar{'lonDocRoot'};
1867: if (($getpropath) || ($getuserdir)) {
1868: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1869: $dir_root = &propath($udom,$uname);
1870: $dir_root =~ s/\/$//;
1871: } else {
1872: &Failure($client,"refused\n",$userinput);
1873: return 1;
1874: }
1875: } elsif ($alternate_root ne '') {
1876: $dir_root = $alternate_root;
1877: }
1878: if (($dir_root ne '') && ($dir_root ne '/')) {
1879: if ($ulsdir =~ /^\//) {
1880: $ulsdir = $dir_root.$ulsdir;
1881: } else {
1882: $ulsdir = $dir_root.'/'.$ulsdir;
1883: }
1884: }
1885: if ($ulsdir =~m{/\.\./}) {
1886: &Failure($client,"refused\n",$userinput);
1887: return 1;
1888: }
1889: my $islocal;
1890: my @machine_ids = &Apache::lonnet::current_machine_ids();
1891: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
1892: $islocal = 1;
1893: }
1894: my $obs;
1895: my $rights;
1896: my $ulsout='';
1897: my $ulsfn;
1898:
1899: my ($crscheck,$toplevel,$currdom,$currnum,$skip);
1900: unless ($islocal) {
1901: my ($major,$minor) = split(/\./,$clientversion);
1902: if (($major < 2) || ($major == 2 && $minor < 12)) {
1903: $crscheck = 1;
1904: }
1905: }
1906: if (-e $ulsdir) {
1907: if(-d $ulsdir) {
1908: unless (($getpropath) || ($getuserdir) ||
1909: ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1910: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) ||
1911: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) {
1912: &Failure($client,"refused\n",$userinput);
1913: return 1;
1914: }
1915: if (($crscheck) &&
1916: ($ulsdir =~ m{^/home/httpd/html/res/($LONCAPA::match_domain)(/?$|/$LONCAPA::match_courseid)})) {
1917: ($currdom,my $posscnum) = ($1,$2);
1918: if (($posscnum eq '') || ($posscnum eq '/')) {
1919: $toplevel = 1;
1920: } else {
1921: $posscnum =~ s{^/+}{};
1922: if (&LONCAPA::Lond::is_course($currdom,$posscnum)) {
1923: $skip = 1;
1924: }
1925: }
1926: }
1927: if ((!$skip) && (opendir(LSDIR,$ulsdir))) {
1928: while ($ulsfn=readdir(LSDIR)) {
1929: if (($crscheck) && ($toplevel) && ($currdom ne '') &&
1930: ($ulsfn =~ /^$LONCAPA::match_courseid$/) && (-d "$ulsdir/$ulsfn")) {
1931: if (&LONCAPA::Lond::is_course($currdom,$ulsfn)) {
1932: next;
1933: }
1934: }
1935: undef($obs);
1936: undef($rights);
1937: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1938: #We do some obsolete checking here
1939: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1940: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1941: my @obsolete=<FILE>;
1942: foreach my $obsolete (@obsolete) {
1943: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1944: if($obsolete =~ m|(<copyright>)(default)|) {
1945: $rights = 1;
1946: }
1947: }
1948: }
1949: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1950: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1951: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1952: $ulsout.= &escape($tmp).':';
1953: }
1954: closedir(LSDIR);
1955: }
1956: } else {
1957: unless (($getpropath) || ($getuserdir) ||
1958: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1959: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) ||
1960: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) {
1961: &Failure($client,"refused\n",$userinput);
1962: return 1;
1963: }
1964: my @ulsstats=stat($ulsdir);
1965: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1966: }
1967: } else {
1968: $ulsout='no_such_dir';
1969: }
1970: if ($ulsout eq '') { $ulsout='empty'; }
1971: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1972: return 1;
1973: }
1974: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1975:
1976: sub read_lonnet_global {
1977: my ($cmd,$tail,$client) = @_;
1978: my $userinput = "$cmd:$tail";
1979: my $requested = &Apache::lonnet::thaw_unescape($tail);
1980: my $result;
1981: my %packagevars = (
1982: spareid => \%Apache::lonnet::spareid,
1983: perlvar => \%Apache::lonnet::perlvar,
1984: );
1985: my %limit_to = (
1986: perlvar => {
1987: lonOtherAuthen => 1,
1988: lonBalancer => 1,
1989: lonVersion => 1,
1990: lonAdmEMail => 1,
1991: lonSupportEMail => 1,
1992: lonSysEMail => 1,
1993: lonHostID => 1,
1994: lonRole => 1,
1995: lonDefDomain => 1,
1996: lonLoadLim => 1,
1997: lonUserLoadLim => 1,
1998: }
1999: );
2000: if (ref($requested) eq 'HASH') {
2001: foreach my $what (keys(%{$requested})) {
2002: my $response;
2003: my $items = {};
2004: if (exists($packagevars{$what})) {
2005: if (ref($limit_to{$what}) eq 'HASH') {
2006: foreach my $varname (keys(%{$packagevars{$what}})) {
2007: if ($limit_to{$what}{$varname}) {
2008: $items->{$varname} = $packagevars{$what}{$varname};
2009: }
2010: }
2011: } else {
2012: $items = $packagevars{$what};
2013: }
2014: if ($what eq 'perlvar') {
2015: if (!exists($packagevars{$what}{'lonBalancer'})) {
2016: if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
2017: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
2018: if (ref($othervarref) eq 'HASH') {
2019: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
2020: }
2021: }
2022: }
2023: }
2024: $response = &Apache::lonnet::freeze_escape($items);
2025: }
2026: $result .= &escape($what).'='.$response.'&';
2027: }
2028: }
2029: $result =~ s/\&$//;
2030: &Reply($client,\$result,$userinput);
2031: return 1;
2032: }
2033: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
2034:
2035: sub server_devalidatecache_handler {
2036: my ($cmd,$tail,$client) = @_;
2037: my $userinput = "$cmd:$tail";
2038: my $items = &unescape($tail);
2039: my @cached = split(/\&/,$items);
2040: foreach my $key (@cached) {
2041: if ($key =~ /:/) {
2042: my ($name,$id) = map { &unescape($_); } split(/:/,$key);
2043: &Apache::lonnet::devalidate_cache_new($name,$id);
2044: }
2045: }
2046: my $result = 'ok';
2047: &Reply($client,\$result,$userinput);
2048: return 1;
2049: }
2050: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
2051:
2052: sub server_timezone_handler {
2053: my ($cmd,$tail,$client) = @_;
2054: my $userinput = "$cmd:$tail";
2055: my $timezone;
2056: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
2057: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
2058: if (-e $clockfile) {
2059: if (open(my $fh,"<$clockfile")) {
2060: while (<$fh>) {
2061: next if (/^[\#\s]/);
2062: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
2063: $timezone = $1;
2064: last;
2065: }
2066: }
2067: close($fh);
2068: }
2069: } elsif (-e $tzfile) {
2070: if (open(my $fh,"<$tzfile")) {
2071: $timezone = <$fh>;
2072: close($fh);
2073: chomp($timezone);
2074: if ($timezone =~ m{^Etc/(\w+)$}) {
2075: $timezone = $1;
2076: }
2077: }
2078: }
2079: &Reply($client,\$timezone,$userinput); # This supports debug logging.
2080: return 1;
2081: }
2082: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
2083:
2084: sub server_loncaparev_handler {
2085: my ($cmd,$tail,$client) = @_;
2086: my $userinput = "$cmd:$tail";
2087: &Reply($client,\$perlvar{'lonVersion'},$userinput);
2088: return 1;
2089: }
2090: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
2091:
2092: sub server_homeID_handler {
2093: my ($cmd,$tail,$client) = @_;
2094: my $userinput = "$cmd:$tail";
2095: &Reply($client,\$perlvar{'lonHostID'},$userinput);
2096: return 1;
2097: }
2098: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
2099:
2100: sub server_distarch_handler {
2101: my ($cmd,$tail,$client) = @_;
2102: my $userinput = "$cmd:$tail";
2103: my $reply = &distro_and_arch();
2104: &Reply($client,\$reply,$userinput);
2105: return 1;
2106: }
2107: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
2108:
2109: sub server_certs_handler {
2110: my ($cmd,$tail,$client) = @_;
2111: my $userinput = "$cmd:$tail";
2112: my $result;
2113: my $result = &LONCAPA::Lond::server_certs(\%perlvar);
2114: &Reply($client,\$result,$userinput);
2115: return;
2116: }
2117: ®ister_handler("servercerts", \&server_certs_handler, 0, 1, 0);
2118:
2119: # Process a reinit request. Reinit requests that either
2120: # lonc or lond be reinitialized so that an updated
2121: # host.tab or domain.tab can be processed.
2122: #
2123: # Parameters:
2124: # $cmd - the actual keyword that invoked us.
2125: # $tail - the tail of the request that invoked us.
2126: # $client - File descriptor connected to the client
2127: # Returns:
2128: # 1 - Ok to continue processing.
2129: # 0 - Program should exit
2130: # Implicit output:
2131: # a reply is sent to the client.
2132: #
2133: sub reinit_process_handler {
2134: my ($cmd, $tail, $client) = @_;
2135:
2136: my $userinput = "$cmd:$tail";
2137:
2138: my $cert = &GetCertificate($userinput);
2139: if(&ValidManager($cert)) {
2140: chomp($userinput);
2141: my $reply = &ReinitProcess($userinput);
2142: &Reply( $client, \$reply, $userinput);
2143: } else {
2144: &Failure( $client, "refused\n", $userinput);
2145: }
2146: return 1;
2147: }
2148: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
2149:
2150: # Process the editing script for a table edit operation.
2151: # the editing operation must be encrypted and requested by
2152: # a manager host.
2153: #
2154: # Parameters:
2155: # $cmd - the actual keyword that invoked us.
2156: # $tail - the tail of the request that invoked us.
2157: # $client - File descriptor connected to the client
2158: # Returns:
2159: # 1 - Ok to continue processing.
2160: # 0 - Program should exit
2161: # Implicit output:
2162: # a reply is sent to the client.
2163: #
2164: sub edit_table_handler {
2165: my ($command, $tail, $client) = @_;
2166:
2167: my $userinput = "$command:$tail";
2168:
2169: my $cert = &GetCertificate($userinput);
2170: if(&ValidManager($cert)) {
2171: my($filetype, $script) = split(/:/, $tail);
2172: if (($filetype eq "hosts") ||
2173: ($filetype eq "domain")) {
2174: if($script ne "") {
2175: &Reply($client, # BUGBUG - EditFile
2176: &EditFile($userinput), # could fail.
2177: $userinput);
2178: } else {
2179: &Failure($client,"refused\n",$userinput);
2180: }
2181: } else {
2182: &Failure($client,"refused\n",$userinput);
2183: }
2184: } else {
2185: &Failure($client,"refused\n",$userinput);
2186: }
2187: return 1;
2188: }
2189: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
2190:
2191: #
2192: # Authenticate a user against the LonCAPA authentication
2193: # database. Note that there are several authentication
2194: # possibilities:
2195: # - unix - The user can be authenticated against the unix
2196: # password file.
2197: # - internal - The user can be authenticated against a purely
2198: # internal per user password file.
2199: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
2200: # ticket granting authority.
2201: # - user - The person tailoring LonCAPA can supply a user authentication
2202: # mechanism that is per system.
2203: #
2204: # Parameters:
2205: # $cmd - The command that got us here.
2206: # $tail - Tail of the command (remaining parameters).
2207: # $client - File descriptor connected to client.
2208: # Returns
2209: # 0 - Requested to exit, caller should shut down.
2210: # 1 - Continue processing.
2211: # Implicit inputs:
2212: # The authentication systems describe above have their own forms of implicit
2213: # input into the authentication process that are described above.
2214: #
2215: sub authenticate_handler {
2216: my ($cmd, $tail, $client) = @_;
2217:
2218:
2219: # Regenerate the full input line
2220:
2221: my $userinput = $cmd.":".$tail;
2222:
2223: # udom - User's domain.
2224: # uname - Username.
2225: # upass - User's password.
2226: # checkdefauth - Pass to validate_user() to try authentication
2227: # with default auth type(s) if no user account.
2228: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
2229: # to check if session can be hosted.
2230:
2231: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
2232: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
2233: chomp($upass);
2234: $upass=&unescape($upass);
2235:
2236: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
2237: if($pwdcorrect) {
2238: my $canhost = 1;
2239: unless ($clientcancheckhost) {
2240: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
2241: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
2242: my @intdoms;
2243: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
2244: if (ref($internet_names) eq 'ARRAY') {
2245: @intdoms = @{$internet_names};
2246: }
2247: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
2248: my ($remote,$hosted);
2249: my $remotesession = &get_usersession_config($udom,'remotesession');
2250: if (ref($remotesession) eq 'HASH') {
2251: $remote = $remotesession->{'remote'};
2252: }
2253: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
2254: if (ref($hostedsession) eq 'HASH') {
2255: $hosted = $hostedsession->{'hosted'};
2256: }
2257: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
2258: $clientversion,
2259: $remote,$hosted);
2260: }
2261: }
2262: if ($canhost) {
2263: &Reply( $client, "authorized\n", $userinput);
2264: } else {
2265: &Reply( $client, "not_allowed_to_host\n", $userinput);
2266: }
2267: #
2268: # Bad credentials: Failed to authorize
2269: #
2270: } else {
2271: &Failure( $client, "non_authorized\n", $userinput);
2272: }
2273:
2274: return 1;
2275: }
2276: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
2277:
2278: #
2279: # Change a user's password. Note that this function is complicated by
2280: # the fact that a user may be authenticated in more than one way:
2281: # At present, we are not able to change the password for all types of
2282: # authentication methods. Only for:
2283: # unix - unix password or shadow passoword style authentication.
2284: # local - Locally written authentication mechanism.
2285: # For now, kerb4 and kerb5 password changes are not supported and result
2286: # in an error.
2287: # FUTURE WORK:
2288: # Support kerberos passwd changes?
2289: # Parameters:
2290: # $cmd - The command that got us here.
2291: # $tail - Tail of the command (remaining parameters).
2292: # $client - File descriptor connected to client.
2293: # Returns
2294: # 0 - Requested to exit, caller should shut down.
2295: # 1 - Continue processing.
2296: # Implicit inputs:
2297: # The authentication systems describe above have their own forms of implicit
2298: # input into the authentication process that are described above.
2299: sub change_password_handler {
2300: my ($cmd, $tail, $client) = @_;
2301:
2302: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
2303:
2304: #
2305: # udom - user's domain.
2306: # uname - Username.
2307: # upass - Current password.
2308: # npass - New password.
2309: # context - Context in which this was called
2310: # (preferences or reset_by_email).
2311: # lonhost - HostID of server where request originated
2312:
2313: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
2314:
2315: $upass=&unescape($upass);
2316: $npass=&unescape($npass);
2317: &Debug("Trying to change password for $uname");
2318:
2319: # First require that the user can be authenticated with their
2320: # old password unless context was 'reset_by_email':
2321:
2322: my ($validated,$failure);
2323: if ($context eq 'reset_by_email') {
2324: if ($lonhost eq '') {
2325: $failure = 'invalid_client';
2326: } else {
2327: $validated = 1;
2328: }
2329: } else {
2330: $validated = &validate_user($udom, $uname, $upass);
2331: }
2332: if($validated) {
2333: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
2334:
2335: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2336: if ($howpwd eq 'internal') {
2337: &Debug("internal auth");
2338: my $ncpass = &hash_passwd($udom,$npass);
2339: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
2340: my $msg="Result of password change for $uname: pwchange_success";
2341: if ($lonhost) {
2342: $msg .= " - request originated from: $lonhost";
2343: }
2344: &logthis($msg);
2345: &update_passwd_history($uname,$udom,$howpwd,$context);
2346: &Reply($client, "ok\n", $userinput);
2347: } else {
2348: &logthis("Unable to open $uname passwd "
2349: ."to change password");
2350: &Failure( $client, "non_authorized\n",$userinput);
2351: }
2352: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2353: my $result = &change_unix_password($uname, $npass);
2354: if ($result eq 'ok') {
2355: &update_passwd_history($uname,$udom,$howpwd,$context);
2356: }
2357: &logthis("Result of password change for $uname: ".
2358: $result);
2359: &Reply($client, \$result, $userinput);
2360: } else {
2361: # this just means that the current password mode is not
2362: # one we know how to change (e.g the kerberos auth modes or
2363: # locally written auth handler).
2364: #
2365: &Failure( $client, "auth_mode_error\n", $userinput);
2366: }
2367:
2368: } else {
2369: if ($failure eq '') {
2370: $failure = 'non_authorized';
2371: }
2372: &Failure( $client, "$failure\n", $userinput);
2373: }
2374:
2375: return 1;
2376: }
2377: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2378:
2379: sub hash_passwd {
2380: my ($domain,$plainpass,@rest) = @_;
2381: my ($salt,$cost);
2382: if (@rest) {
2383: $cost = $rest[0];
2384: # salt is first 22 characters, base-64 encoded by bcrypt
2385: my $plainsalt = substr($rest[1],0,22);
2386: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
2387: } else {
2388: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
2389: my $defaultcost = $domdefaults{'intauth_cost'};
2390: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
2391: $cost = 10;
2392: } else {
2393: $cost = $defaultcost;
2394: }
2395: # Generate random 16-octet base64 salt
2396: $salt = "";
2397: $salt .= pack("C", int rand(256)) for 1..16;
2398: }
2399: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
2400: key_nul => 1,
2401: cost => $cost,
2402: salt => $salt,
2403: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
2404:
2405: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
2406: &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
2407: &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
2408: return $result;
2409: }
2410:
2411: #
2412: # Create a new user. User in this case means a lon-capa user.
2413: # The user must either already exist in some authentication realm
2414: # like kerberos or the /etc/passwd. If not, a user completely local to
2415: # this loncapa system is created.
2416: #
2417: # Parameters:
2418: # $cmd - The command that got us here.
2419: # $tail - Tail of the command (remaining parameters).
2420: # $client - File descriptor connected to client.
2421: # Returns
2422: # 0 - Requested to exit, caller should shut down.
2423: # 1 - Continue processing.
2424: # Implicit inputs:
2425: # The authentication systems describe above have their own forms of implicit
2426: # input into the authentication process that are described above.
2427: sub add_user_handler {
2428:
2429: my ($cmd, $tail, $client) = @_;
2430:
2431:
2432: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2433: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2434:
2435: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2436:
2437:
2438: if($udom eq $currentdomainid) { # Reject new users for other domains...
2439:
2440: my $oldumask=umask(0077);
2441: chomp($npass);
2442: $npass=&unescape($npass);
2443: my $passfilename = &password_path($udom, $uname);
2444: &Debug("Password file created will be:".$passfilename);
2445: if (-e $passfilename) {
2446: &Failure( $client, "already_exists\n", $userinput);
2447: } else {
2448: my $fperror='';
2449: if (!&mkpath($passfilename)) {
2450: $fperror="error: ".($!+0)." mkdir failed while attempting "
2451: ."makeuser";
2452: }
2453: unless ($fperror) {
2454: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2455: $passfilename,'makeuser');
2456: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2457: } else {
2458: &Failure($client, \$fperror, $userinput);
2459: }
2460: }
2461: umask($oldumask);
2462: } else {
2463: &Failure($client, "not_right_domain\n",
2464: $userinput); # Even if we are multihomed.
2465:
2466: }
2467: return 1;
2468:
2469: }
2470: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2471:
2472: #
2473: # Change the authentication method of a user. Note that this may
2474: # also implicitly change the user's password if, for example, the user is
2475: # joining an existing authentication realm. Known authentication realms at
2476: # this time are:
2477: # internal - Purely internal password file (only loncapa knows this user)
2478: # local - Institutionally written authentication module.
2479: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2480: # kerb4 - kerberos version 4
2481: # kerb5 - kerberos version 5
2482: #
2483: # Parameters:
2484: # $cmd - The command that got us here.
2485: # $tail - Tail of the command (remaining parameters).
2486: # $client - File descriptor connected to client.
2487: # Returns
2488: # 0 - Requested to exit, caller should shut down.
2489: # 1 - Continue processing.
2490: # Implicit inputs:
2491: # The authentication systems describe above have their own forms of implicit
2492: # input into the authentication process that are described above.
2493: # NOTE:
2494: # This is also used to change the authentication credential values (e.g. passwd).
2495: #
2496: #
2497: sub change_authentication_handler {
2498:
2499: my ($cmd, $tail, $client) = @_;
2500:
2501: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2502:
2503: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2504: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2505: if ($udom ne $currentdomainid) {
2506: &Failure( $client, "not_right_domain\n", $client);
2507: } else {
2508:
2509: chomp($npass);
2510:
2511: $npass=&unescape($npass);
2512: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2513: my $passfilename = &password_path($udom, $uname);
2514: if ($passfilename) { # Not allowed to create a new user!!
2515: # If just changing the unix passwd. need to arrange to run
2516: # passwd since otherwise make_passwd_file will fail as
2517: # creation of unix authenticated users is no longer supported
2518: # except from the command line, when running make_domain_coordinator.pl
2519:
2520: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2521: my $result = &change_unix_password($uname, $npass);
2522: &logthis("Result of password change for $uname: ".$result);
2523: if ($result eq "ok") {
2524: &update_passwd_history($uname,$udom,$umode,'changeuserauth');
2525: &Reply($client, \$result);
2526: } else {
2527: &Failure($client, \$result);
2528: }
2529: } else {
2530: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2531: $passfilename,'changeuserauth');
2532: #
2533: # If the current auth mode is internal, and the old auth mode was
2534: # unix, or krb*, and the user is an author for this domain,
2535: # re-run manage_permissions for that role in order to be able
2536: # to take ownership of the construction space back to www:www
2537: #
2538:
2539:
2540: &Reply($client, \$result, $userinput);
2541: }
2542:
2543:
2544: } else {
2545: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2546: }
2547: }
2548: return 1;
2549: }
2550: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2551:
2552: sub update_passwd_history {
2553: my ($uname,$udom,$umode,$context) = @_;
2554: my $proname=&propath($udom,$uname);
2555: my $now = time;
2556: if (open(my $fh,">>$proname/passwd.log")) {
2557: print $fh "$now:$umode:$context\n";
2558: close($fh);
2559: }
2560: return;
2561: }
2562:
2563: #
2564: # Determines if this is the home server for a user. The home server
2565: # for a user will have his/her lon-capa passwd file. Therefore all we need
2566: # to do is determine if this file exists.
2567: #
2568: # Parameters:
2569: # $cmd - The command that got us here.
2570: # $tail - Tail of the command (remaining parameters).
2571: # $client - File descriptor connected to client.
2572: # Returns
2573: # 0 - Requested to exit, caller should shut down.
2574: # 1 - Continue processing.
2575: # Implicit inputs:
2576: # The authentication systems describe above have their own forms of implicit
2577: # input into the authentication process that are described above.
2578: #
2579: sub is_home_handler {
2580: my ($cmd, $tail, $client) = @_;
2581:
2582: my $userinput = "$cmd:$tail";
2583:
2584: my ($udom,$uname)=split(/:/,$tail);
2585: chomp($uname);
2586: my $passfile = &password_filename($udom, $uname);
2587: if($passfile) {
2588: &Reply( $client, "found\n", $userinput);
2589: } else {
2590: &Failure($client, "not_found\n", $userinput);
2591: }
2592: return 1;
2593: }
2594: ®ister_handler("home", \&is_home_handler, 0,1,0);
2595:
2596: #
2597: # Process an update request for a resource.
2598: # A resource has been modified that we hold a subscription to.
2599: # If the resource is not local, then we must update, or at least invalidate our
2600: # cached copy of the resource.
2601: # Parameters:
2602: # $cmd - The command that got us here.
2603: # $tail - Tail of the command (remaining parameters).
2604: # $client - File descriptor connected to client.
2605: # Returns
2606: # 0 - Requested to exit, caller should shut down.
2607: # 1 - Continue processing.
2608: # Implicit inputs:
2609: # The authentication systems describe above have their own forms of implicit
2610: # input into the authentication process that are described above.
2611: #
2612: sub update_resource_handler {
2613:
2614: my ($cmd, $tail, $client) = @_;
2615:
2616: my $userinput = "$cmd:$tail";
2617:
2618: my $fname= $tail; # This allows interactive testing
2619:
2620:
2621: my $ownership=ishome($fname);
2622: if ($ownership eq 'not_owner') {
2623: if (-e $fname) {
2624: # Delete preview file, if exists
2625: unlink("$fname.tmp");
2626: # Get usage stats
2627: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2628: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2629: my $now=time;
2630: my $since=$now-$atime;
2631: # If the file has not been used within lonExpire seconds,
2632: # unsubscribe from it and delete local copy
2633: if ($since>$perlvar{'lonExpire'}) {
2634: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2635: &devalidate_meta_cache($fname);
2636: unlink("$fname");
2637: unlink("$fname.meta");
2638: } else {
2639: # Yes, this is in active use. Get a fresh copy. Since it might be in
2640: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2641: my $transname="$fname.in.transfer";
2642: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2643: my $response;
2644: # FIXME: cannot replicate files that take more than two minutes to transfer -- needs checking now 1200s timeout used
2645: # for LWP request.
2646: my $request=new HTTP::Request('GET',"$remoteurl");
2647: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
2648: if ($response->is_error()) {
2649: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2650: &devalidate_meta_cache($fname);
2651: if (-e $transname) {
2652: unlink($transname);
2653: }
2654: unlink($fname);
2655: my $message=$response->status_line;
2656: &logthis("LWP GET: $message for $fname ($remoteurl)");
2657: } else {
2658: if ($remoteurl!~/\.meta$/) {
2659: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2660: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
2661: if ($mresponse->is_error()) {
2662: unlink($fname.'.meta');
2663: }
2664: }
2665: # we successfully transfered, copy file over to real name
2666: rename($transname,$fname);
2667: &devalidate_meta_cache($fname);
2668: }
2669: }
2670: &Reply( $client, "ok\n", $userinput);
2671: } else {
2672: &Failure($client, "not_found\n", $userinput);
2673: }
2674: } else {
2675: &Failure($client, "rejected\n", $userinput);
2676: }
2677: return 1;
2678: }
2679: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2680:
2681: sub devalidate_meta_cache {
2682: my ($url) = @_;
2683: use Cache::Memcached;
2684: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2685: $url = &Apache::lonnet::declutter($url);
2686: $url =~ s-\.meta$--;
2687: my $id = &escape('meta:'.$url);
2688: $memcache->delete($id);
2689: }
2690:
2691: #
2692: # Fetch a user file from a remote server to the user's home directory
2693: # userfiles subdir.
2694: # Parameters:
2695: # $cmd - The command that got us here.
2696: # $tail - Tail of the command (remaining parameters).
2697: # $client - File descriptor connected to client.
2698: # Returns
2699: # 0 - Requested to exit, caller should shut down.
2700: # 1 - Continue processing.
2701: #
2702: sub fetch_user_file_handler {
2703:
2704: my ($cmd, $tail, $client) = @_;
2705:
2706: my $userinput = "$cmd:$tail";
2707: my $fname = $tail;
2708: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2709: my $udir=&propath($udom,$uname).'/userfiles';
2710: unless (-e $udir) {
2711: mkdir($udir,0770);
2712: }
2713: Debug("fetch user file for $fname");
2714: if (-e $udir) {
2715: $ufile=~s/^[\.\~]+//;
2716:
2717: # IF necessary, create the path right down to the file.
2718: # Note that any regular files in the way of this path are
2719: # wiped out to deal with some earlier folly of mine.
2720:
2721: if (!&mkpath($udir.'/'.$ufile)) {
2722: &Failure($client, "unable_to_create\n", $userinput);
2723: }
2724:
2725: my $destname=$udir.'/'.$ufile;
2726: my $transname=$udir.'/'.$ufile.'.in.transit';
2727: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2728: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2729: my $clienthost = &Apache::lonnet::hostname($clientname);
2730: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2731: my $response;
2732: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2733: my $request=new HTTP::Request('GET',"$remoteurl");
2734: my $verifycert = 1;
2735: my @machine_ids = &Apache::lonnet::current_machine_ids();
2736: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
2737: $verifycert = 0;
2738: }
2739: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
2740: if ($response->is_error()) {
2741: unlink($transname);
2742: my $message=$response->status_line;
2743: &logthis("LWP GET: $message for $fname ($remoteurl)");
2744: &Failure($client, "failed\n", $userinput);
2745: } else {
2746: Debug("Renaming $transname to $destname");
2747: if (!rename($transname,$destname)) {
2748: &logthis("Unable to move $transname to $destname");
2749: unlink($transname);
2750: &Failure($client, "failed\n", $userinput);
2751: } else {
2752: if ($fname =~ /^default.+\.(page|sequence)$/) {
2753: my ($major,$minor) = split(/\./,$clientversion);
2754: if (($major < 2) || ($major == 2 && $minor < 11)) {
2755: my $now = time;
2756: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2757: my $key = &escape('internal.contentchange');
2758: my $what = "$key=$now";
2759: my $hashref = &tie_user_hash($udom,$uname,'environment',
2760: &GDBM_WRCREAT(),"P",$what);
2761: if ($hashref) {
2762: $hashref->{$key}=$now;
2763: if (!&untie_user_hash($hashref)) {
2764: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2765: "when updating internal.contentchange");
2766: }
2767: }
2768: }
2769: }
2770: &Reply($client, "ok\n", $userinput);
2771: }
2772: }
2773: } else {
2774: &Failure($client, "not_home\n", $userinput);
2775: }
2776: return 1;
2777: }
2778: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2779:
2780: #
2781: # Remove a file from a user's home directory userfiles subdirectory.
2782: # Parameters:
2783: # cmd - the Lond request keyword that got us here.
2784: # tail - the part of the command past the keyword.
2785: # client- File descriptor connected with the client.
2786: #
2787: # Returns:
2788: # 1 - Continue processing.
2789: sub remove_user_file_handler {
2790: my ($cmd, $tail, $client) = @_;
2791:
2792: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2793:
2794: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2795: if ($ufile =~m|/\.\./|) {
2796: # any files paths with /../ in them refuse
2797: # to deal with
2798: &Failure($client, "refused\n", "$cmd:$tail");
2799: } else {
2800: my $udir = &propath($udom,$uname);
2801: if (-e $udir) {
2802: my $file=$udir.'/userfiles/'.$ufile;
2803: if (-e $file) {
2804: #
2805: # If the file is a regular file unlink is fine...
2806: # However it's possible the client wants a dir
2807: # removed, in which case rmdir is more appropriate.
2808: # Note: rmdir will only remove an empty directory.
2809: #
2810: if (-f $file){
2811: unlink($file);
2812: # for html files remove the associated .bak file
2813: # which may have been created by the editor.
2814: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
2815: my $path = $1;
2816: if (-e $file.'.bak') {
2817: unlink($file.'.bak');
2818: }
2819: }
2820: } elsif(-d $file) {
2821: rmdir($file);
2822: }
2823: if (-e $file) {
2824: # File is still there after we deleted it ?!?
2825:
2826: &Failure($client, "failed\n", "$cmd:$tail");
2827: } else {
2828: &Reply($client, "ok\n", "$cmd:$tail");
2829: }
2830: } else {
2831: &Failure($client, "not_found\n", "$cmd:$tail");
2832: }
2833: } else {
2834: &Failure($client, "not_home\n", "$cmd:$tail");
2835: }
2836: }
2837: return 1;
2838: }
2839: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2840:
2841: #
2842: # make a directory in a user's home directory userfiles subdirectory.
2843: # Parameters:
2844: # cmd - the Lond request keyword that got us here.
2845: # tail - the part of the command past the keyword.
2846: # client- File descriptor connected with the client.
2847: #
2848: # Returns:
2849: # 1 - Continue processing.
2850: sub mkdir_user_file_handler {
2851: my ($cmd, $tail, $client) = @_;
2852:
2853: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2854: $dir=&unescape($dir);
2855: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2856: if ($ufile =~m|/\.\./|) {
2857: # any files paths with /../ in them refuse
2858: # to deal with
2859: &Failure($client, "refused\n", "$cmd:$tail");
2860: } else {
2861: my $udir = &propath($udom,$uname);
2862: if (-e $udir) {
2863: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2864: if (!&mkpath($newdir)) {
2865: &Failure($client, "failed\n", "$cmd:$tail");
2866: }
2867: &Reply($client, "ok\n", "$cmd:$tail");
2868: } else {
2869: &Failure($client, "not_home\n", "$cmd:$tail");
2870: }
2871: }
2872: return 1;
2873: }
2874: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2875:
2876: #
2877: # rename a file in a user's home directory userfiles subdirectory.
2878: # Parameters:
2879: # cmd - the Lond request keyword that got us here.
2880: # tail - the part of the command past the keyword.
2881: # client- File descriptor connected with the client.
2882: #
2883: # Returns:
2884: # 1 - Continue processing.
2885: sub rename_user_file_handler {
2886: my ($cmd, $tail, $client) = @_;
2887:
2888: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2889: $old=&unescape($old);
2890: $new=&unescape($new);
2891: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2892: # any files paths with /../ in them refuse to deal with
2893: &Failure($client, "refused\n", "$cmd:$tail");
2894: } else {
2895: my $udir = &propath($udom,$uname);
2896: if (-e $udir) {
2897: my $oldfile=$udir.'/userfiles/'.$old;
2898: my $newfile=$udir.'/userfiles/'.$new;
2899: if (-e $newfile) {
2900: &Failure($client, "exists\n", "$cmd:$tail");
2901: } elsif (! -e $oldfile) {
2902: &Failure($client, "not_found\n", "$cmd:$tail");
2903: } else {
2904: if (!rename($oldfile,$newfile)) {
2905: &Failure($client, "failed\n", "$cmd:$tail");
2906: } else {
2907: &Reply($client, "ok\n", "$cmd:$tail");
2908: }
2909: }
2910: } else {
2911: &Failure($client, "not_home\n", "$cmd:$tail");
2912: }
2913: }
2914: return 1;
2915: }
2916: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2917:
2918: #
2919: # Checks if the specified user has an active session on the server
2920: # return ok if so, not_found if not
2921: #
2922: # Parameters:
2923: # cmd - The request keyword that dispatched to tus.
2924: # tail - The tail of the request (colon separated parameters).
2925: # client - Filehandle open on the client.
2926: # Return:
2927: # 1.
2928: sub user_has_session_handler {
2929: my ($cmd, $tail, $client) = @_;
2930:
2931: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2932:
2933: opendir(DIR,$perlvar{'lonIDsDir'});
2934: my $filename;
2935: while ($filename=readdir(DIR)) {
2936: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2937: }
2938: if ($filename) {
2939: &Reply($client, "ok\n", "$cmd:$tail");
2940: } else {
2941: &Failure($client, "not_found\n", "$cmd:$tail");
2942: }
2943: return 1;
2944:
2945: }
2946: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2947:
2948: #
2949: # Authenticate access to a user file by checking that the token the user's
2950: # passed also exists in their session file
2951: #
2952: # Parameters:
2953: # cmd - The request keyword that dispatched to tus.
2954: # tail - The tail of the request (colon separated parameters).
2955: # client - Filehandle open on the client.
2956: # Return:
2957: # 1.
2958: sub token_auth_user_file_handler {
2959: my ($cmd, $tail, $client) = @_;
2960:
2961: my ($fname, $session) = split(/:/, $tail);
2962:
2963: chomp($session);
2964: my $reply="non_auth";
2965: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2966: if (open(ENVIN,"$file")) {
2967: flock(ENVIN,LOCK_SH);
2968: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2969: if (exists($disk_env{"userfile.$fname"})) {
2970: $reply="ok";
2971: } else {
2972: foreach my $envname (keys(%disk_env)) {
2973: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2974: $reply="ok";
2975: last;
2976: }
2977: }
2978: }
2979: untie(%disk_env);
2980: close(ENVIN);
2981: &Reply($client, \$reply, "$cmd:$tail");
2982: } else {
2983: &Failure($client, "invalid_token\n", "$cmd:$tail");
2984: }
2985: return 1;
2986:
2987: }
2988: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2989:
2990: #
2991: # Unsubscribe from a resource.
2992: #
2993: # Parameters:
2994: # $cmd - The command that got us here.
2995: # $tail - Tail of the command (remaining parameters).
2996: # $client - File descriptor connected to client.
2997: # Returns
2998: # 0 - Requested to exit, caller should shut down.
2999: # 1 - Continue processing.
3000: #
3001: sub unsubscribe_handler {
3002: my ($cmd, $tail, $client) = @_;
3003:
3004: my $userinput= "$cmd:$tail";
3005:
3006: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
3007:
3008: &Debug("Unsubscribing $fname");
3009: if (-e $fname) {
3010: &Debug("Exists");
3011: &Reply($client, &unsub($fname,$clientip), $userinput);
3012: } else {
3013: &Failure($client, "not_found\n", $userinput);
3014: }
3015: return 1;
3016: }
3017: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
3018:
3019: # Subscribe to a resource
3020: #
3021: # Parameters:
3022: # $cmd - The command that got us here.
3023: # $tail - Tail of the command (remaining parameters).
3024: # $client - File descriptor connected to client.
3025: # Returns
3026: # 0 - Requested to exit, caller should shut down.
3027: # 1 - Continue processing.
3028: #
3029: sub subscribe_handler {
3030: my ($cmd, $tail, $client)= @_;
3031:
3032: my $userinput = "$cmd:$tail";
3033:
3034: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
3035:
3036: return 1;
3037: }
3038: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
3039:
3040: #
3041: # Determine the latest version of a resource (it looks for the highest
3042: # past version and then returns that +1)
3043: #
3044: # Parameters:
3045: # $cmd - The command that got us here.
3046: # $tail - Tail of the command (remaining parameters).
3047: # (Should consist of an absolute path to a file)
3048: # $client - File descriptor connected to client.
3049: # Returns
3050: # 0 - Requested to exit, caller should shut down.
3051: # 1 - Continue processing.
3052: #
3053: sub current_version_handler {
3054: my ($cmd, $tail, $client) = @_;
3055:
3056: my $userinput= "$cmd:$tail";
3057:
3058: my $fname = $tail;
3059: &Reply( $client, ¤tversion($fname)."\n", $userinput);
3060: return 1;
3061:
3062: }
3063: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
3064:
3065: # Make an entry in a user's activity log.
3066: #
3067: # Parameters:
3068: # $cmd - The command that got us here.
3069: # $tail - Tail of the command (remaining parameters).
3070: # $client - File descriptor connected to client.
3071: # Returns
3072: # 0 - Requested to exit, caller should shut down.
3073: # 1 - Continue processing.
3074: #
3075: sub activity_log_handler {
3076: my ($cmd, $tail, $client) = @_;
3077:
3078:
3079: my $userinput= "$cmd:$tail";
3080:
3081: my ($udom,$uname,$what)=split(/:/,$tail);
3082: chomp($what);
3083: my $proname=&propath($udom,$uname);
3084: my $now=time;
3085: my $hfh;
3086: if ($hfh=IO::File->new(">>$proname/activity.log")) {
3087: print $hfh "$now:$clientname:$what\n";
3088: &Reply( $client, "ok\n", $userinput);
3089: } else {
3090: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
3091: ."while attempting log\n",
3092: $userinput);
3093: }
3094:
3095: return 1;
3096: }
3097: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
3098:
3099: #
3100: # Put a namespace entry in a user profile hash.
3101: # My druthers would be for this to be an encrypted interaction too.
3102: # anything that might be an inadvertent covert channel about either
3103: # user authentication or user personal information....
3104: #
3105: # Parameters:
3106: # $cmd - The command that got us here.
3107: # $tail - Tail of the command (remaining parameters).
3108: # $client - File descriptor connected to client.
3109: # Returns
3110: # 0 - Requested to exit, caller should shut down.
3111: # 1 - Continue processing.
3112: #
3113: sub put_user_profile_entry {
3114: my ($cmd, $tail, $client) = @_;
3115:
3116: my $userinput = "$cmd:$tail";
3117:
3118: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3119: if ($namespace ne 'roles') {
3120: chomp($what);
3121: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3122: &GDBM_WRCREAT(),"P",$what);
3123: if($hashref) {
3124: my @pairs=split(/\&/,$what);
3125: foreach my $pair (@pairs) {
3126: my ($key,$value)=split(/=/,$pair);
3127: $hashref->{$key}=$value;
3128: }
3129: if (&untie_user_hash($hashref)) {
3130: &Reply( $client, "ok\n", $userinput);
3131: } else {
3132: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3133: "while attempting put\n",
3134: $userinput);
3135: }
3136: } else {
3137: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3138: "while attempting put\n", $userinput);
3139: }
3140: } else {
3141: &Failure( $client, "refused\n", $userinput);
3142: }
3143:
3144: return 1;
3145: }
3146: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
3147:
3148: # Put a piece of new data in hash, returns error if entry already exists
3149: # Parameters:
3150: # $cmd - The command that got us here.
3151: # $tail - Tail of the command (remaining parameters).
3152: # $client - File descriptor connected to client.
3153: # Returns
3154: # 0 - Requested to exit, caller should shut down.
3155: # 1 - Continue processing.
3156: #
3157: sub newput_user_profile_entry {
3158: my ($cmd, $tail, $client) = @_;
3159:
3160: my $userinput = "$cmd:$tail";
3161:
3162: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3163: if ($namespace eq 'roles') {
3164: &Failure( $client, "refused\n", $userinput);
3165: return 1;
3166: }
3167:
3168: chomp($what);
3169:
3170: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3171: &GDBM_WRCREAT(),"N",$what);
3172: if(!$hashref) {
3173: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3174: "while attempting put\n", $userinput);
3175: return 1;
3176: }
3177:
3178: my @pairs=split(/\&/,$what);
3179: foreach my $pair (@pairs) {
3180: my ($key,$value)=split(/=/,$pair);
3181: if (exists($hashref->{$key})) {
3182: if (!&untie_user_hash($hashref)) {
3183: &logthis("error: ".($!+0)." untie (GDBM) failed ".
3184: "while attempting newput - early out as key exists");
3185: }
3186: &Failure($client, "key_exists: ".$key."\n",$userinput);
3187: return 1;
3188: }
3189: }
3190:
3191: foreach my $pair (@pairs) {
3192: my ($key,$value)=split(/=/,$pair);
3193: $hashref->{$key}=$value;
3194: }
3195:
3196: if (&untie_user_hash($hashref)) {
3197: &Reply( $client, "ok\n", $userinput);
3198: } else {
3199: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3200: "while attempting put\n",
3201: $userinput);
3202: }
3203: return 1;
3204: }
3205: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
3206:
3207: #
3208: # Increment a profile entry in the user history file.
3209: # The history contains keyword value pairs. In this case,
3210: # The value itself is a pair of numbers. The first, the current value
3211: # the second an increment that this function applies to the current
3212: # value.
3213: #
3214: # Parameters:
3215: # $cmd - The command that got us here.
3216: # $tail - Tail of the command (remaining parameters).
3217: # $client - File descriptor connected to client.
3218: # Returns
3219: # 0 - Requested to exit, caller should shut down.
3220: # 1 - Continue processing.
3221: #
3222: sub increment_user_value_handler {
3223: my ($cmd, $tail, $client) = @_;
3224:
3225: my $userinput = "$cmd:$tail";
3226:
3227: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
3228: if ($namespace ne 'roles') {
3229: chomp($what);
3230: my $hashref = &tie_user_hash($udom, $uname,
3231: $namespace, &GDBM_WRCREAT(),
3232: "P",$what);
3233: if ($hashref) {
3234: my @pairs=split(/\&/,$what);
3235: foreach my $pair (@pairs) {
3236: my ($key,$value)=split(/=/,$pair);
3237: $value = &unescape($value);
3238: # We could check that we have a number...
3239: if (! defined($value) || $value eq '') {
3240: $value = 1;
3241: }
3242: $hashref->{$key}+=$value;
3243: if ($namespace eq 'nohist_resourcetracker') {
3244: if ($hashref->{$key} < 0) {
3245: $hashref->{$key} = 0;
3246: }
3247: }
3248: }
3249: if (&untie_user_hash($hashref)) {
3250: &Reply( $client, "ok\n", $userinput);
3251: } else {
3252: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3253: "while attempting inc\n", $userinput);
3254: }
3255: } else {
3256: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3257: "while attempting inc\n", $userinput);
3258: }
3259: } else {
3260: &Failure($client, "refused\n", $userinput);
3261: }
3262:
3263: return 1;
3264: }
3265: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
3266:
3267: #
3268: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
3269: # Each 'role' a user has implies a set of permissions. Adding a new role
3270: # for a person grants the permissions packaged with that role
3271: # to that user when the role is selected.
3272: #
3273: # Parameters:
3274: # $cmd - The command string (rolesput).
3275: # $tail - The remainder of the request line. For rolesput this
3276: # consists of a colon separated list that contains:
3277: # The domain and user that is granting the role (logged).
3278: # The domain and user that is getting the role.
3279: # The roles being granted as a set of & separated pairs.
3280: # each pair a key value pair.
3281: # $client - File descriptor connected to the client.
3282: # Returns:
3283: # 0 - If the daemon should exit
3284: # 1 - To continue processing.
3285: #
3286: #
3287: sub roles_put_handler {
3288: my ($cmd, $tail, $client) = @_;
3289:
3290: my $userinput = "$cmd:$tail";
3291:
3292: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
3293:
3294:
3295: my $namespace='roles';
3296: chomp($what);
3297: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3298: &GDBM_WRCREAT(), "P",
3299: "$exedom:$exeuser:$what");
3300: #
3301: # Log the attempt to set a role. The {}'s here ensure that the file
3302: # handle is open for the minimal amount of time. Since the flush
3303: # is done on close this improves the chances the log will be an un-
3304: # corrupted ordered thing.
3305: if ($hashref) {
3306: my $pass_entry = &get_auth_type($udom, $uname);
3307: my ($auth_type,$pwd) = split(/:/, $pass_entry);
3308: $auth_type = $auth_type.":";
3309: my @pairs=split(/\&/,$what);
3310: foreach my $pair (@pairs) {
3311: my ($key,$value)=split(/=/,$pair);
3312: &manage_permissions($key, $udom, $uname,
3313: $auth_type);
3314: $hashref->{$key}=$value;
3315: }
3316: if (&untie_user_hash($hashref)) {
3317: &Reply($client, "ok\n", $userinput);
3318: } else {
3319: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3320: "while attempting rolesput\n", $userinput);
3321: }
3322: } else {
3323: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3324: "while attempting rolesput\n", $userinput);
3325: }
3326: return 1;
3327: }
3328: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
3329:
3330: #
3331: # Deletes (removes) a role for a user. This is equivalent to removing
3332: # a permissions package associated with the role from the user's profile.
3333: #
3334: # Parameters:
3335: # $cmd - The command (rolesdel)
3336: # $tail - The remainder of the request line. This consists
3337: # of:
3338: # The domain and user requesting the change (logged)
3339: # The domain and user being changed.
3340: # The roles being revoked. These are shipped to us
3341: # as a bunch of & separated role name keywords.
3342: # $client - The file handle open on the client.
3343: # Returns:
3344: # 1 - Continue processing
3345: # 0 - Exit.
3346: #
3347: sub roles_delete_handler {
3348: my ($cmd, $tail, $client) = @_;
3349:
3350: my $userinput = "$cmd:$tail";
3351:
3352: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
3353: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
3354: "what = ".$what);
3355: my $namespace='roles';
3356: chomp($what);
3357: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3358: &GDBM_WRCREAT(), "D",
3359: "$exedom:$exeuser:$what");
3360:
3361: if ($hashref) {
3362: my @rolekeys=split(/\&/,$what);
3363:
3364: foreach my $key (@rolekeys) {
3365: delete $hashref->{$key};
3366: }
3367: if (&untie_user_hash($hashref)) {
3368: &Reply($client, "ok\n", $userinput);
3369: } else {
3370: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3371: "while attempting rolesdel\n", $userinput);
3372: }
3373: } else {
3374: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3375: "while attempting rolesdel\n", $userinput);
3376: }
3377:
3378: return 1;
3379: }
3380: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
3381:
3382: # Unencrypted get from a user's profile database. See
3383: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
3384: # This function retrieves a keyed item from a specific named database in the
3385: # user's directory.
3386: #
3387: # Parameters:
3388: # $cmd - Command request keyword (get).
3389: # $tail - Tail of the command. This is a colon separated list
3390: # consisting of the domain and username that uniquely
3391: # identifies the profile,
3392: # The 'namespace' which selects the gdbm file to
3393: # do the lookup in,
3394: # & separated list of keys to lookup. Note that
3395: # the values are returned as an & separated list too.
3396: # $client - File descriptor open on the client.
3397: # Returns:
3398: # 1 - Continue processing.
3399: # 0 - Exit.
3400: #
3401: sub get_profile_entry {
3402: my ($cmd, $tail, $client) = @_;
3403:
3404: my $userinput= "$cmd:$tail";
3405:
3406: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3407: chomp($what);
3408:
3409:
3410: my $replystring = read_profile($udom, $uname, $namespace, $what);
3411: my ($first) = split(/:/,$replystring);
3412: if($first ne "error") {
3413: &Reply($client, \$replystring, $userinput);
3414: } else {
3415: &Failure($client, $replystring." while attempting get\n", $userinput);
3416: }
3417: return 1;
3418:
3419:
3420: }
3421: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3422:
3423: #
3424: # Process the encrypted get request. Note that the request is sent
3425: # in clear, but the reply is encrypted. This is a small covert channel:
3426: # information about the sensitive keys is given to the snooper. Just not
3427: # information about the values of the sensitive key. Hmm if I wanted to
3428: # know these I'd snoop for the egets. Get the profile item names from them
3429: # and then issue a get for them since there's no enforcement of the
3430: # requirement of an encrypted get for particular profile items. If I
3431: # were re-doing this, I'd force the request to be encrypted as well as the
3432: # reply. I'd also just enforce encrypted transactions for all gets since
3433: # that would prevent any covert channel snooping.
3434: #
3435: # Parameters:
3436: # $cmd - Command keyword of request (eget).
3437: # $tail - Tail of the command. See GetProfileEntry
3438: # for more information about this.
3439: # $client - File open on the client.
3440: # Returns:
3441: # 1 - Continue processing
3442: # 0 - server should exit.
3443: sub get_profile_entry_encrypted {
3444: my ($cmd, $tail, $client) = @_;
3445:
3446: my $userinput = "$cmd:$tail";
3447:
3448: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3449: chomp($what);
3450: my $qresult = read_profile($udom, $uname, $namespace, $what);
3451: my ($first) = split(/:/, $qresult);
3452: if($first ne "error") {
3453:
3454: if ($cipher) {
3455: my $cmdlength=length($qresult);
3456: $qresult.=" ";
3457: my $encqresult='';
3458: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3459: $encqresult.= unpack("H16",
3460: $cipher->encrypt(substr($qresult,
3461: $encidx,
3462: 8)));
3463: }
3464: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3465: } else {
3466: &Failure( $client, "error:no_key\n", $userinput);
3467: }
3468: } else {
3469: &Failure($client, "$qresult while attempting eget\n", $userinput);
3470:
3471: }
3472:
3473: return 1;
3474: }
3475: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3476:
3477: #
3478: # Deletes a key in a user profile database.
3479: #
3480: # Parameters:
3481: # $cmd - Command keyword (del).
3482: # $tail - Command tail. IN this case a colon
3483: # separated list containing:
3484: # The domain and user that identifies uniquely
3485: # the identity of the user.
3486: # The profile namespace (name of the profile
3487: # database file).
3488: # & separated list of keywords to delete.
3489: # $client - File open on client socket.
3490: # Returns:
3491: # 1 - Continue processing
3492: # 0 - Exit server.
3493: #
3494: #
3495: sub delete_profile_entry {
3496: my ($cmd, $tail, $client) = @_;
3497:
3498: my $userinput = "cmd:$tail";
3499:
3500: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3501: chomp($what);
3502: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3503: &GDBM_WRCREAT(),
3504: "D",$what);
3505: if ($hashref) {
3506: my @keys=split(/\&/,$what);
3507: foreach my $key (@keys) {
3508: delete($hashref->{$key});
3509: }
3510: if (&untie_user_hash($hashref)) {
3511: &Reply($client, "ok\n", $userinput);
3512: } else {
3513: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3514: "while attempting del\n", $userinput);
3515: }
3516: } else {
3517: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3518: "while attempting del\n", $userinput);
3519: }
3520: return 1;
3521: }
3522: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3523:
3524: #
3525: # List the set of keys that are defined in a profile database file.
3526: # A successful reply from this will contain an & separated list of
3527: # the keys.
3528: # Parameters:
3529: # $cmd - Command request (keys).
3530: # $tail - Remainder of the request, a colon separated
3531: # list containing domain/user that identifies the
3532: # user being queried, and the database namespace
3533: # (database filename essentially).
3534: # $client - File open on the client.
3535: # Returns:
3536: # 1 - Continue processing.
3537: # 0 - Exit the server.
3538: #
3539: sub get_profile_keys {
3540: my ($cmd, $tail, $client) = @_;
3541:
3542: my $userinput = "$cmd:$tail";
3543:
3544: my ($udom,$uname,$namespace)=split(/:/,$tail);
3545: my $qresult='';
3546: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3547: &GDBM_READER());
3548: if ($hashref) {
3549: foreach my $key (keys %$hashref) {
3550: $qresult.="$key&";
3551: }
3552: if (&untie_user_hash($hashref)) {
3553: $qresult=~s/\&$//;
3554: &Reply($client, \$qresult, $userinput);
3555: } else {
3556: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3557: "while attempting keys\n", $userinput);
3558: }
3559: } else {
3560: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3561: "while attempting keys\n", $userinput);
3562: }
3563:
3564: return 1;
3565: }
3566: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3567:
3568: #
3569: # Dump the contents of a user profile database.
3570: # Note that this constitutes a very large covert channel too since
3571: # the dump will return sensitive information that is not encrypted.
3572: # The naive security assumption is that the session negotiation ensures
3573: # our client is trusted and I don't believe that's assured at present.
3574: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3575: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3576: #
3577: # Parameters:
3578: # $cmd - The command request keyword (currentdump).
3579: # $tail - Remainder of the request, consisting of a colon
3580: # separated list that has the domain/username and
3581: # the namespace to dump (database file).
3582: # $client - file open on the remote client.
3583: # Returns:
3584: # 1 - Continue processing.
3585: # 0 - Exit the server.
3586: #
3587: sub dump_profile_database {
3588: my ($cmd, $tail, $client) = @_;
3589:
3590: my $res = LONCAPA::Lond::dump_profile_database($tail);
3591:
3592: if ($res =~ /^error:/) {
3593: Failure($client, \$res, "$cmd:$tail");
3594: } else {
3595: Reply($client, \$res, "$cmd:$tail");
3596: }
3597:
3598: return 1;
3599:
3600: #TODO remove
3601: my $userinput = "$cmd:$tail";
3602:
3603: my ($udom,$uname,$namespace) = split(/:/,$tail);
3604: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3605: &GDBM_READER());
3606: if ($hashref) {
3607: # Structure of %data:
3608: # $data{$symb}->{$parameter}=$value;
3609: # $data{$symb}->{'v.'.$parameter}=$version;
3610: # since $parameter will be unescaped, we do not
3611: # have to worry about silly parameter names...
3612:
3613: my $qresult='';
3614: my %data = (); # A hash of anonymous hashes..
3615: while (my ($key,$value) = each(%$hashref)) {
3616: my ($v,$symb,$param) = split(/:/,$key);
3617: next if ($v eq 'version' || $symb eq 'keys');
3618: next if (exists($data{$symb}) &&
3619: exists($data{$symb}->{$param}) &&
3620: $data{$symb}->{'v.'.$param} > $v);
3621: $data{$symb}->{$param}=$value;
3622: $data{$symb}->{'v.'.$param}=$v;
3623: }
3624: if (&untie_user_hash($hashref)) {
3625: while (my ($symb,$param_hash) = each(%data)) {
3626: while(my ($param,$value) = each (%$param_hash)){
3627: next if ($param =~ /^v\./); # Ignore versions...
3628: #
3629: # Just dump the symb=value pairs separated by &
3630: #
3631: $qresult.=$symb.':'.$param.'='.$value.'&';
3632: }
3633: }
3634: chop($qresult);
3635: &Reply($client , \$qresult, $userinput);
3636: } else {
3637: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3638: "while attempting currentdump\n", $userinput);
3639: }
3640: } else {
3641: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3642: "while attempting currentdump\n", $userinput);
3643: }
3644:
3645: return 1;
3646: }
3647: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3648:
3649: #
3650: # Dump a profile database with an optional regular expression
3651: # to match against the keys. In this dump, no effort is made
3652: # to separate symb from version information. Presumably the
3653: # databases that are dumped by this command are of a different
3654: # structure. Need to look at this and improve the documentation of
3655: # both this and the currentdump handler.
3656: # Parameters:
3657: # $cmd - The command keyword.
3658: # $tail - All of the characters after the $cmd:
3659: # These are expected to be a colon
3660: # separated list containing:
3661: # domain/user - identifying the user.
3662: # namespace - identifying the database.
3663: # regexp - optional regular expression
3664: # that is matched against
3665: # database keywords to do
3666: # selective dumps.
3667: # range - optional range of entries
3668: # e.g., 10-20 would return the
3669: # 10th to 19th items, etc.
3670: # $client - Channel open on the client.
3671: # Returns:
3672: # 1 - Continue processing.
3673: # Side effects:
3674: # response is written to $client.
3675: #
3676: sub dump_with_regexp {
3677: my ($cmd, $tail, $client) = @_;
3678:
3679: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3680:
3681: if ($res =~ /^error:/) {
3682: Failure($client, \$res, "$cmd:$tail");
3683: } else {
3684: Reply($client, \$res, "$cmd:$tail");
3685: }
3686:
3687: return 1;
3688: }
3689: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3690:
3691: # Store a set of key=value pairs associated with a versioned name.
3692: #
3693: # Parameters:
3694: # $cmd - Request command keyword.
3695: # $tail - Tail of the request. This is a colon
3696: # separated list containing:
3697: # domain/user - User and authentication domain.
3698: # namespace - Name of the database being modified
3699: # rid - Resource keyword to modify.
3700: # what - new value associated with rid.
3701: # laststore - (optional) version=timestamp
3702: # for most recent transaction for rid
3703: # in namespace, when cstore was called
3704: #
3705: # $client - Socket open on the client.
3706: #
3707: #
3708: # Returns:
3709: # 1 (keep on processing).
3710: # Side-Effects:
3711: # Writes to the client
3712: # Successful storage will cause either 'ok', or, if $laststore was included
3713: # in the tail of the request, and the version number for the last transaction
3714: # is larger than the version in $laststore, delay:$numtrans , where $numtrans
3715: # is the number of store evevnts recorded for rid in namespace since
3716: # lonnet::store() was called by the client.
3717: #
3718: sub store_handler {
3719: my ($cmd, $tail, $client) = @_;
3720:
3721: my $userinput = "$cmd:$tail";
3722: chomp($tail);
3723: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
3724: if ($namespace ne 'roles') {
3725:
3726: my @pairs=split(/\&/,$what);
3727: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3728: &GDBM_WRCREAT(), "S",
3729: "$rid:$what");
3730: if ($hashref) {
3731: my $now = time;
3732: my $numtrans;
3733: if ($laststore) {
3734: my ($previousversion,$previoustime) = split(/\=/,$laststore);
3735: my ($lastversion,$lasttime) = (0,0);
3736: $lastversion = $hashref->{"version:$rid"};
3737: if ($lastversion) {
3738: $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
3739: }
3740: if (($previousversion) && ($previousversion !~ /\D/)) {
3741: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
3742: $numtrans = $lastversion - $previousversion;
3743: }
3744: } elsif ($lastversion) {
3745: $numtrans = $lastversion;
3746: }
3747: if ($numtrans) {
3748: $numtrans =~ s/D//g;
3749: }
3750: }
3751: $hashref->{"version:$rid"}++;
3752: my $version=$hashref->{"version:$rid"};
3753: my $allkeys='';
3754: foreach my $pair (@pairs) {
3755: my ($key,$value)=split(/=/,$pair);
3756: $allkeys.=$key.':';
3757: $hashref->{"$version:$rid:$key"}=$value;
3758: }
3759: $hashref->{"$version:$rid:timestamp"}=$now;
3760: $allkeys.='timestamp';
3761: $hashref->{"$version:keys:$rid"}=$allkeys;
3762: if (&untie_user_hash($hashref)) {
3763: my $msg = 'ok';
3764: if ($numtrans) {
3765: $msg = 'delay:'.$numtrans;
3766: }
3767: &Reply($client, "$msg\n", $userinput);
3768: } else {
3769: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3770: "while attempting store\n", $userinput);
3771: }
3772: } else {
3773: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3774: "while attempting store\n", $userinput);
3775: }
3776: } else {
3777: &Failure($client, "refused\n", $userinput);
3778: }
3779:
3780: return 1;
3781: }
3782: ®ister_handler("store", \&store_handler, 0, 1, 0);
3783:
3784: # Modify a set of key=value pairs associated with a versioned name.
3785: #
3786: # Parameters:
3787: # $cmd - Request command keyword.
3788: # $tail - Tail of the request. This is a colon
3789: # separated list containing:
3790: # domain/user - User and authentication domain.
3791: # namespace - Name of the database being modified
3792: # rid - Resource keyword to modify.
3793: # v - Version item to modify
3794: # what - new value associated with rid.
3795: #
3796: # $client - Socket open on the client.
3797: #
3798: #
3799: # Returns:
3800: # 1 (keep on processing).
3801: # Side-Effects:
3802: # Writes to the client
3803: sub putstore_handler {
3804: my ($cmd, $tail, $client) = @_;
3805:
3806: my $userinput = "$cmd:$tail";
3807:
3808: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3809: if ($namespace ne 'roles') {
3810:
3811: chomp($what);
3812: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3813: &GDBM_WRCREAT(), "M",
3814: "$rid:$v:$what");
3815: if ($hashref) {
3816: my $now = time;
3817: my %data = &hash_extract($what);
3818: my @allkeys;
3819: while (my($key,$value) = each(%data)) {
3820: push(@allkeys,$key);
3821: $hashref->{"$v:$rid:$key"} = $value;
3822: }
3823: my $allkeys = join(':',@allkeys);
3824: $hashref->{"$v:keys:$rid"}=$allkeys;
3825:
3826: if (&untie_user_hash($hashref)) {
3827: &Reply($client, "ok\n", $userinput);
3828: } else {
3829: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3830: "while attempting store\n", $userinput);
3831: }
3832: } else {
3833: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3834: "while attempting store\n", $userinput);
3835: }
3836: } else {
3837: &Failure($client, "refused\n", $userinput);
3838: }
3839:
3840: return 1;
3841: }
3842: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3843:
3844: sub hash_extract {
3845: my ($str)=@_;
3846: my %hash;
3847: foreach my $pair (split(/\&/,$str)) {
3848: my ($key,$value)=split(/=/,$pair);
3849: $hash{$key}=$value;
3850: }
3851: return (%hash);
3852: }
3853: sub hash_to_str {
3854: my ($hash_ref)=@_;
3855: my $str;
3856: foreach my $key (keys(%$hash_ref)) {
3857: $str.=$key.'='.$hash_ref->{$key}.'&';
3858: }
3859: $str=~s/\&$//;
3860: return $str;
3861: }
3862:
3863: #
3864: # Dump out all versions of a resource that has key=value pairs associated
3865: # with it for each version. These resources are built up via the store
3866: # command.
3867: #
3868: # Parameters:
3869: # $cmd - Command keyword.
3870: # $tail - Remainder of the request which consists of:
3871: # domain/user - User and auth. domain.
3872: # namespace - name of resource database.
3873: # rid - Resource id.
3874: # $client - socket open on the client.
3875: #
3876: # Returns:
3877: # 1 indicating the caller should not yet exit.
3878: # Side-effects:
3879: # Writes a reply to the client.
3880: # The reply is a string of the following shape:
3881: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3882: # Where the 1 above represents version 1.
3883: # this continues for all pairs of keys in all versions.
3884: #
3885: #
3886: #
3887: #
3888: sub restore_handler {
3889: my ($cmd, $tail, $client) = @_;
3890:
3891: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3892: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3893: $namespace=~s/\//\_/g;
3894: $namespace = &LONCAPA::clean_username($namespace);
3895:
3896: chomp($rid);
3897: my $qresult='';
3898: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3899: if ($hashref) {
3900: my $version=$hashref->{"version:$rid"};
3901: $qresult.="version=$version&";
3902: my $scope;
3903: for ($scope=1;$scope<=$version;$scope++) {
3904: my $vkeys=$hashref->{"$scope:keys:$rid"};
3905: my @keys=split(/:/,$vkeys);
3906: my $key;
3907: $qresult.="$scope:keys=$vkeys&";
3908: foreach $key (@keys) {
3909: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3910: }
3911: }
3912: if (&untie_user_hash($hashref)) {
3913: $qresult=~s/\&$//;
3914: &Reply( $client, \$qresult, $userinput);
3915: } else {
3916: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3917: "while attempting restore\n", $userinput);
3918: }
3919: } else {
3920: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3921: "while attempting restore\n", $userinput);
3922: }
3923:
3924: return 1;
3925:
3926:
3927: }
3928: ®ister_handler("restore", \&restore_handler, 0,1,0);
3929:
3930: #
3931: # Add a chat message to a synchronous discussion board.
3932: #
3933: # Parameters:
3934: # $cmd - Request keyword.
3935: # $tail - Tail of the command. A colon separated list
3936: # containing:
3937: # cdom - Domain on which the chat board lives
3938: # cnum - Course containing the chat board.
3939: # newpost - Body of the posting.
3940: # group - Optional group, if chat board is only
3941: # accessible in a group within the course
3942: # $client - Socket open on the client.
3943: # Returns:
3944: # 1 - Indicating caller should keep on processing.
3945: #
3946: # Side-effects:
3947: # writes a reply to the client.
3948: #
3949: #
3950: sub send_chat_handler {
3951: my ($cmd, $tail, $client) = @_;
3952:
3953:
3954: my $userinput = "$cmd:$tail";
3955:
3956: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3957: &chat_add($cdom,$cnum,$newpost,$group);
3958: &Reply($client, "ok\n", $userinput);
3959:
3960: return 1;
3961: }
3962: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3963:
3964: #
3965: # Retrieve the set of chat messages from a discussion board.
3966: #
3967: # Parameters:
3968: # $cmd - Command keyword that initiated the request.
3969: # $tail - Remainder of the request after the command
3970: # keyword. In this case a colon separated list of
3971: # chat domain - Which discussion board.
3972: # chat id - Discussion thread(?)
3973: # domain/user - Authentication domain and username
3974: # of the requesting person.
3975: # group - Optional course group containing
3976: # the board.
3977: # $client - Socket open on the client program.
3978: # Returns:
3979: # 1 - continue processing
3980: # Side effects:
3981: # Response is written to the client.
3982: #
3983: sub retrieve_chat_handler {
3984: my ($cmd, $tail, $client) = @_;
3985:
3986:
3987: my $userinput = "$cmd:$tail";
3988:
3989: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3990: my $reply='';
3991: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3992: $reply.=&escape($_).':';
3993: }
3994: $reply=~s/\:$//;
3995: &Reply($client, \$reply, $userinput);
3996:
3997:
3998: return 1;
3999: }
4000: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
4001:
4002: #
4003: # Initiate a query of an sql database. SQL query repsonses get put in
4004: # a file for later retrieval. This prevents sql query results from
4005: # bottlenecking the system. Note that with loncnew, perhaps this is
4006: # less of an issue since multiple outstanding requests can be concurrently
4007: # serviced.
4008: #
4009: # Parameters:
4010: # $cmd - Command keyword that initiated the request.
4011: # $tail - Remainder of the command after the keyword.
4012: # For this function, this consists of a query and
4013: # 3 arguments that are self-documentingly labelled
4014: # in the original arg1, arg2, arg3.
4015: # $client - Socket open on the client.
4016: # Return:
4017: # 1 - Indicating processing should continue.
4018: # Side-effects:
4019: # a reply is written to $client.
4020: #
4021: sub send_query_handler {
4022: my ($cmd, $tail, $client) = @_;
4023:
4024: my $userinput = "$cmd:$tail";
4025:
4026: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
4027: $query=~s/\n*$//g;
4028: if (($query eq 'usersearch') || ($query eq 'instdirsearch')) {
4029: my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch');
4030: my $earlyout;
4031: if (ref($usersearchconf) eq 'HASH') {
4032: if ($currentdomainid eq $clienthomedom) {
4033: if ($query eq 'usersearch') {
4034: if ($usersearchconf->{'lcavailable'} eq '0') {
4035: $earlyout = 1;
4036: }
4037: } else {
4038: if ($usersearchconf->{'available'} eq '0') {
4039: $earlyout = 1;
4040: }
4041: }
4042: } else {
4043: if ($query eq 'usersearch') {
4044: if ($usersearchconf->{'lclocalonly'}) {
4045: $earlyout = 1;
4046: }
4047: } else {
4048: if ($usersearchconf->{'localonly'}) {
4049: $earlyout = 1;
4050: }
4051: }
4052: }
4053: }
4054: if ($earlyout) {
4055: &Reply($client, "query_not_authorized\n");
4056: return 1;
4057: }
4058: }
4059: &Reply($client, "". &sql_reply("$clientname\&$query".
4060: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
4061: $userinput);
4062:
4063: return 1;
4064: }
4065: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
4066:
4067: #
4068: # Add a reply to an sql query. SQL queries are done asyncrhonously.
4069: # The query is submitted via a "querysend" transaction.
4070: # There it is passed on to the lonsql daemon, queued and issued to
4071: # mysql.
4072: # This transaction is invoked when the sql transaction is complete
4073: # it stores the query results in flie and indicates query completion.
4074: # presumably local software then fetches this response... I'm guessing
4075: # the sequence is: lonc does a querysend, we ask lonsql to do it.
4076: # lonsql on completion of the query interacts with the lond of our
4077: # client to do a query reply storing two files:
4078: # - id - The results of the query.
4079: # - id.end - Indicating the transaction completed.
4080: # NOTE: id is a unique id assigned to the query and querysend time.
4081: # Parameters:
4082: # $cmd - Command keyword that initiated this request.
4083: # $tail - Remainder of the tail. In this case that's a colon
4084: # separated list containing the query Id and the
4085: # results of the query.
4086: # $client - Socket open on the client.
4087: # Return:
4088: # 1 - Indicating that we should continue processing.
4089: # Side effects:
4090: # ok written to the client.
4091: #
4092: sub reply_query_handler {
4093: my ($cmd, $tail, $client) = @_;
4094:
4095:
4096: my $userinput = "$cmd:$tail";
4097:
4098: my ($id,$reply)=split(/:/,$tail);
4099: my $store;
4100: my $execdir=$perlvar{'lonDaemons'};
4101: if ($store=IO::File->new(">$execdir/tmp/$id")) {
4102: $reply=~s/\&/\n/g;
4103: print $store $reply;
4104: close $store;
4105: my $store2=IO::File->new(">$execdir/tmp/$id.end");
4106: print $store2 "done\n";
4107: close $store2;
4108: &Reply($client, "ok\n", $userinput);
4109: } else {
4110: &Failure($client, "error: ".($!+0)
4111: ." IO::File->new Failed ".
4112: "while attempting queryreply\n", $userinput);
4113: }
4114:
4115:
4116: return 1;
4117: }
4118: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
4119:
4120: #
4121: # Process the courseidput request. Not quite sure what this means
4122: # at the system level sense. It appears a gdbm file in the
4123: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
4124: # a set of entries made in that database.
4125: #
4126: # Parameters:
4127: # $cmd - The command keyword that initiated this request.
4128: # $tail - Tail of the command. In this case consists of a colon
4129: # separated list contaning the domain to apply this to and
4130: # an ampersand separated list of keyword=value pairs.
4131: # Each value is a colon separated list that includes:
4132: # description, institutional code and course owner.
4133: # For backward compatibility with versions included
4134: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
4135: # code and/or course owner are preserved from the existing
4136: # record when writing a new record in response to 1.1 or
4137: # 1.2 implementations of lonnet::flushcourselogs().
4138: #
4139: # $client - Socket open on the client.
4140: # Returns:
4141: # 1 - indicating that processing should continue
4142: #
4143: # Side effects:
4144: # reply is written to the client.
4145: #
4146: sub put_course_id_handler {
4147: my ($cmd, $tail, $client) = @_;
4148:
4149:
4150: my $userinput = "$cmd:$tail";
4151:
4152: my ($udom, $what) = split(/:/, $tail,2);
4153: chomp($what);
4154: my $now=time;
4155: my @pairs=split(/\&/,$what);
4156:
4157: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4158: if ($hashref) {
4159: foreach my $pair (@pairs) {
4160: my ($key,$courseinfo) = split(/=/,$pair,2);
4161: $courseinfo =~ s/=/:/g;
4162: if (defined($hashref->{$key})) {
4163: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
4164: if (ref($value) eq 'HASH') {
4165: my @items = ('description','inst_code','owner','type');
4166: my @new_items = split(/:/,$courseinfo,-1);
4167: my %storehash;
4168: for (my $i=0; $i<@new_items; $i++) {
4169: $storehash{$items[$i]} = &unescape($new_items[$i]);
4170: }
4171: $hashref->{$key} =
4172: &Apache::lonnet::freeze_escape(\%storehash);
4173: my $unesc_key = &unescape($key);
4174: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4175: next;
4176: }
4177: }
4178: my @current_items = split(/:/,$hashref->{$key},-1);
4179: shift(@current_items); # remove description
4180: pop(@current_items); # remove last access
4181: my $numcurrent = scalar(@current_items);
4182: if ($numcurrent > 3) {
4183: $numcurrent = 3;
4184: }
4185: my @new_items = split(/:/,$courseinfo,-1);
4186: my $numnew = scalar(@new_items);
4187: if ($numcurrent > 0) {
4188: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
4189: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
4190: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
4191: }
4192: }
4193: }
4194: $hashref->{$key}=$courseinfo.':'.$now;
4195: }
4196: if (&untie_domain_hash($hashref)) {
4197: &Reply( $client, "ok\n", $userinput);
4198: } else {
4199: &Failure($client, "error: ".($!+0)
4200: ." untie(GDBM) Failed ".
4201: "while attempting courseidput\n", $userinput);
4202: }
4203: } else {
4204: &Failure($client, "error: ".($!+0)
4205: ." tie(GDBM) Failed ".
4206: "while attempting courseidput\n", $userinput);
4207: }
4208:
4209: return 1;
4210: }
4211: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
4212:
4213: sub put_course_id_hash_handler {
4214: my ($cmd, $tail, $client) = @_;
4215: my $userinput = "$cmd:$tail";
4216: my ($udom,$mode,$what) = split(/:/, $tail,3);
4217: chomp($what);
4218: my $now=time;
4219: my @pairs=split(/\&/,$what);
4220: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4221: if ($hashref) {
4222: foreach my $pair (@pairs) {
4223: my ($key,$value)=split(/=/,$pair);
4224: my $unesc_key = &unescape($key);
4225: if ($mode ne 'timeonly') {
4226: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
4227: my $curritems = &Apache::lonnet::thaw_unescape($key);
4228: if (ref($curritems) ne 'HASH') {
4229: my @current_items = split(/:/,$hashref->{$key},-1);
4230: my $lasttime = pop(@current_items);
4231: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
4232: } else {
4233: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
4234: }
4235: }
4236: $hashref->{$key} = $value;
4237: }
4238: if ($mode ne 'notime') {
4239: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4240: }
4241: }
4242: if (&untie_domain_hash($hashref)) {
4243: &Reply($client, "ok\n", $userinput);
4244: } else {
4245: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4246: "while attempting courseidputhash\n", $userinput);
4247: }
4248: } else {
4249: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4250: "while attempting courseidputhash\n", $userinput);
4251: }
4252: return 1;
4253: }
4254: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
4255:
4256: # Retrieves the value of a course id resource keyword pattern
4257: # defined since a starting date. Both the starting date and the
4258: # keyword pattern are optional. If the starting date is not supplied it
4259: # is treated as the beginning of time. If the pattern is not found,
4260: # it is treatred as "." matching everything.
4261: #
4262: # Parameters:
4263: # $cmd - Command keyword that resulted in us being dispatched.
4264: # $tail - The remainder of the command that, in this case, consists
4265: # of a colon separated list of:
4266: # domain - The domain in which the course database is
4267: # defined.
4268: # since - Optional parameter describing the minimum
4269: # time of definition(?) of the resources that
4270: # will match the dump.
4271: # description - regular expression that is used to filter
4272: # the dump. Only keywords matching this regexp
4273: # will be used.
4274: # institutional code - optional supplied code to filter
4275: # the dump. Only courses with an institutional code
4276: # that match the supplied code will be returned.
4277: # owner - optional supplied username and domain of owner to
4278: # filter the dump. Only courses for which the course
4279: # owner matches the supplied username and/or domain
4280: # will be returned. Pre-2.2.0 legacy entries from
4281: # nohist_courseiddump will only contain usernames.
4282: # type - optional parameter for selection
4283: # regexp_ok - if 1 or -1 allow the supplied institutional code
4284: # filter to behave as a regular expression:
4285: # 1 will not exclude the course if the instcode matches the RE
4286: # -1 will exclude the course if the instcode matches the RE
4287: # rtn_as_hash - whether to return the information available for
4288: # each matched item as a frozen hash of all
4289: # key, value pairs in the item's hash, or as a
4290: # colon-separated list of (in order) description,
4291: # institutional code, and course owner.
4292: # selfenrollonly - filter by courses allowing self-enrollment
4293: # now or in the future (selfenrollonly = 1).
4294: # catfilter - filter by course category, assigned to a course
4295: # using manually defined categories (i.e., not
4296: # self-cataloging based on on institutional code).
4297: # showhidden - include course in results even if course
4298: # was set to be excluded from course catalog (DC only).
4299: # caller - if set to 'coursecatalog', courses set to be hidden
4300: # from course catalog will be excluded from results (unless
4301: # overridden by "showhidden".
4302: # cloner - escaped username:domain of course cloner (if picking course to
4303: # clone).
4304: # cc_clone_list - escaped comma separated list of courses for which
4305: # course cloner has active CC role (and so can clone
4306: # automatically).
4307: # cloneonly - filter by courses for which cloner has rights to clone.
4308: # createdbefore - include courses for which creation date preceeded this date.
4309: # createdafter - include courses for which creation date followed this date.
4310: # creationcontext - include courses created in specified context
4311: #
4312: # domcloner - flag to indicate if user can create CCs in course's domain.
4313: # If so, ability to clone course is automatic.
4314: # hasuniquecode - filter by courses for which a six character unique code has
4315: # been set.
4316: #
4317: # $client - The socket open on the client.
4318: # Returns:
4319: # 1 - Continue processing.
4320: # Side Effects:
4321: # a reply is written to $client.
4322: sub dump_course_id_handler {
4323: my ($cmd, $tail, $client) = @_;
4324:
4325: my $res = LONCAPA::Lond::dump_course_id_handler($tail);
4326: if ($res =~ /^error:/) {
4327: Failure($client, \$res, "$cmd:$tail");
4328: } else {
4329: Reply($client, \$res, "$cmd:$tail");
4330: }
4331:
4332: return 1;
4333:
4334: #TODO remove
4335: my $userinput = "$cmd:$tail";
4336:
4337: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
4338: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
4339: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
4340: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
4341: my $now = time;
4342: my ($cloneruname,$clonerudom,%cc_clone);
4343: if (defined($description)) {
4344: $description=&unescape($description);
4345: } else {
4346: $description='.';
4347: }
4348: if (defined($instcodefilter)) {
4349: $instcodefilter=&unescape($instcodefilter);
4350: } else {
4351: $instcodefilter='.';
4352: }
4353: my ($ownerunamefilter,$ownerdomfilter);
4354: if (defined($ownerfilter)) {
4355: $ownerfilter=&unescape($ownerfilter);
4356: if ($ownerfilter ne '.' && defined($ownerfilter)) {
4357: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
4358: $ownerunamefilter = $1;
4359: $ownerdomfilter = $2;
4360: } else {
4361: $ownerunamefilter = $ownerfilter;
4362: $ownerdomfilter = '';
4363: }
4364: }
4365: } else {
4366: $ownerfilter='.';
4367: }
4368:
4369: if (defined($coursefilter)) {
4370: $coursefilter=&unescape($coursefilter);
4371: } else {
4372: $coursefilter='.';
4373: }
4374: if (defined($typefilter)) {
4375: $typefilter=&unescape($typefilter);
4376: } else {
4377: $typefilter='.';
4378: }
4379: if (defined($regexp_ok)) {
4380: $regexp_ok=&unescape($regexp_ok);
4381: }
4382: if (defined($catfilter)) {
4383: $catfilter=&unescape($catfilter);
4384: }
4385: if (defined($cloner)) {
4386: $cloner = &unescape($cloner);
4387: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4388: }
4389: if (defined($cc_clone_list)) {
4390: $cc_clone_list = &unescape($cc_clone_list);
4391: my @cc_cloners = split('&',$cc_clone_list);
4392: foreach my $cid (@cc_cloners) {
4393: my ($clonedom,$clonenum) = split(':',$cid);
4394: next if ($clonedom ne $udom);
4395: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4396: }
4397: }
4398: if ($createdbefore ne '') {
4399: $createdbefore = &unescape($createdbefore);
4400: } else {
4401: $createdbefore = 0;
4402: }
4403: if ($createdafter ne '') {
4404: $createdafter = &unescape($createdafter);
4405: } else {
4406: $createdafter = 0;
4407: }
4408: if ($creationcontext ne '') {
4409: $creationcontext = &unescape($creationcontext);
4410: } else {
4411: $creationcontext = '.';
4412: }
4413: unless ($hasuniquecode) {
4414: $hasuniquecode = '.';
4415: }
4416: my $unpack = 1;
4417: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
4418: $typefilter eq '.') {
4419: $unpack = 0;
4420: }
4421: if (!defined($since)) { $since=0; }
4422: my $qresult='';
4423: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4424: if ($hashref) {
4425: while (my ($key,$value) = each(%$hashref)) {
4426: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
4427: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4428: $context);
4429: $unesc_key = &unescape($key);
4430: if ($unesc_key =~ /^lasttime:/) {
4431: next;
4432: } else {
4433: $lasttime_key = &escape('lasttime:'.$unesc_key);
4434: }
4435: if ($hashref->{$lasttime_key} ne '') {
4436: $lasttime = $hashref->{$lasttime_key};
4437: next if ($lasttime<$since);
4438: }
4439: my ($canclone,$valchange);
4440: my $items = &Apache::lonnet::thaw_unescape($value);
4441: if (ref($items) eq 'HASH') {
4442: if ($hashref->{$lasttime_key} eq '') {
4443: next if ($since > 1);
4444: }
4445: $is_hash = 1;
4446: if ($domcloner) {
4447: $canclone = 1;
4448: } elsif (defined($clonerudom)) {
4449: if ($items->{'cloners'}) {
4450: my @cloneable = split(',',$items->{'cloners'});
4451: if (@cloneable) {
4452: if (grep(/^\*$/,@cloneable)) {
4453: $canclone = 1;
4454: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4455: $canclone = 1;
4456: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4457: $canclone = 1;
4458: }
4459: }
4460: unless ($canclone) {
4461: if ($cloneruname ne '' && $clonerudom ne '') {
4462: if ($cc_clone{$unesc_key}) {
4463: $canclone = 1;
4464: $items->{'cloners'} .= ','.$cloneruname.':'.
4465: $clonerudom;
4466: $valchange = 1;
4467: }
4468: }
4469: }
4470: } elsif (defined($cloneruname)) {
4471: if ($cc_clone{$unesc_key}) {
4472: $canclone = 1;
4473: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4474: $valchange = 1;
4475: }
4476: unless ($canclone) {
4477: if ($items->{'owner'} =~ /:/) {
4478: if ($items->{'owner'} eq $cloner) {
4479: $canclone = 1;
4480: }
4481: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4482: $canclone = 1;
4483: }
4484: if ($canclone) {
4485: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4486: $valchange = 1;
4487: }
4488: }
4489: }
4490: }
4491: if ($unpack || !$rtn_as_hash) {
4492: $unesc_val{'descr'} = $items->{'description'};
4493: $unesc_val{'inst_code'} = $items->{'inst_code'};
4494: $unesc_val{'owner'} = $items->{'owner'};
4495: $unesc_val{'type'} = $items->{'type'};
4496: $unesc_val{'cloners'} = $items->{'cloners'};
4497: $unesc_val{'created'} = $items->{'created'};
4498: $unesc_val{'context'} = $items->{'context'};
4499: }
4500: $selfenroll_types = $items->{'selfenroll_types'};
4501: $selfenroll_end = $items->{'selfenroll_end_date'};
4502: $created = $items->{'created'};
4503: $context = $items->{'context'};
4504: if ($hasuniquecode ne '.') {
4505: next unless ($items->{'uniquecode'});
4506: }
4507: if ($selfenrollonly) {
4508: next if (!$selfenroll_types);
4509: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4510: next;
4511: }
4512: }
4513: if ($creationcontext ne '.') {
4514: next if (($context ne '') && ($context ne $creationcontext));
4515: }
4516: if ($createdbefore > 0) {
4517: next if (($created eq '') || ($created > $createdbefore));
4518: }
4519: if ($createdafter > 0) {
4520: next if (($created eq '') || ($created <= $createdafter));
4521: }
4522: if ($catfilter ne '') {
4523: next if ($items->{'categories'} eq '');
4524: my @categories = split('&',$items->{'categories'});
4525: next if (@categories == 0);
4526: my @subcats = split('&',$catfilter);
4527: my $matchcat = 0;
4528: foreach my $cat (@categories) {
4529: if (grep(/^\Q$cat\E$/,@subcats)) {
4530: $matchcat = 1;
4531: last;
4532: }
4533: }
4534: next if (!$matchcat);
4535: }
4536: if ($caller eq 'coursecatalog') {
4537: if ($items->{'hidefromcat'} eq 'yes') {
4538: next if !$showhidden;
4539: }
4540: }
4541: } else {
4542: next if ($catfilter ne '');
4543: next if ($selfenrollonly);
4544: next if ($createdbefore || $createdafter);
4545: next if ($creationcontext ne '.');
4546: if ((defined($clonerudom)) && (defined($cloneruname))) {
4547: if ($cc_clone{$unesc_key}) {
4548: $canclone = 1;
4549: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4550: }
4551: }
4552: $is_hash = 0;
4553: my @courseitems = split(/:/,$value);
4554: $lasttime = pop(@courseitems);
4555: if ($hashref->{$lasttime_key} eq '') {
4556: next if ($lasttime<$since);
4557: }
4558: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4559: }
4560: if ($cloneonly) {
4561: next unless ($canclone);
4562: }
4563: my $match = 1;
4564: if ($description ne '.') {
4565: if (!$is_hash) {
4566: $unesc_val{'descr'} = &unescape($val{'descr'});
4567: }
4568: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4569: $match = 0;
4570: }
4571: }
4572: if ($instcodefilter ne '.') {
4573: if (!$is_hash) {
4574: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4575: }
4576: if ($regexp_ok == 1) {
4577: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4578: $match = 0;
4579: }
4580: } elsif ($regexp_ok == -1) {
4581: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4582: $match = 0;
4583: }
4584: } else {
4585: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4586: $match = 0;
4587: }
4588: }
4589: }
4590: if ($ownerfilter ne '.') {
4591: if (!$is_hash) {
4592: $unesc_val{'owner'} = &unescape($val{'owner'});
4593: }
4594: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4595: if ($unesc_val{'owner'} =~ /:/) {
4596: if (eval{$unesc_val{'owner'} !~
4597: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4598: $match = 0;
4599: }
4600: } else {
4601: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4602: $match = 0;
4603: }
4604: }
4605: } elsif ($ownerunamefilter ne '') {
4606: if ($unesc_val{'owner'} =~ /:/) {
4607: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4608: $match = 0;
4609: }
4610: } else {
4611: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4612: $match = 0;
4613: }
4614: }
4615: } elsif ($ownerdomfilter ne '') {
4616: if ($unesc_val{'owner'} =~ /:/) {
4617: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4618: $match = 0;
4619: }
4620: } else {
4621: if ($ownerdomfilter ne $udom) {
4622: $match = 0;
4623: }
4624: }
4625: }
4626: }
4627: if ($coursefilter ne '.') {
4628: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4629: $match = 0;
4630: }
4631: }
4632: if ($typefilter ne '.') {
4633: if (!$is_hash) {
4634: $unesc_val{'type'} = &unescape($val{'type'});
4635: }
4636: if ($unesc_val{'type'} eq '') {
4637: if ($typefilter ne 'Course') {
4638: $match = 0;
4639: }
4640: } else {
4641: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4642: $match = 0;
4643: }
4644: }
4645: }
4646: if ($match == 1) {
4647: if ($rtn_as_hash) {
4648: if ($is_hash) {
4649: if ($valchange) {
4650: my $newvalue = &Apache::lonnet::freeze_escape($items);
4651: $qresult.=$key.'='.$newvalue.'&';
4652: } else {
4653: $qresult.=$key.'='.$value.'&';
4654: }
4655: } else {
4656: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4657: 'inst_code' => &unescape($val{'inst_code'}),
4658: 'owner' => &unescape($val{'owner'}),
4659: 'type' => &unescape($val{'type'}),
4660: 'cloners' => &unescape($val{'cloners'}),
4661: );
4662: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4663: $qresult.=$key.'='.$items.'&';
4664: }
4665: } else {
4666: if ($is_hash) {
4667: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4668: &escape($unesc_val{'inst_code'}).':'.
4669: &escape($unesc_val{'owner'}).'&';
4670: } else {
4671: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4672: ':'.$val{'owner'}.'&';
4673: }
4674: }
4675: }
4676: }
4677: if (&untie_domain_hash($hashref)) {
4678: chop($qresult);
4679: &Reply($client, \$qresult, $userinput);
4680: } else {
4681: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4682: "while attempting courseiddump\n", $userinput);
4683: }
4684: } else {
4685: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4686: "while attempting courseiddump\n", $userinput);
4687: }
4688: return 1;
4689: }
4690: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4691:
4692: sub course_lastaccess_handler {
4693: my ($cmd, $tail, $client) = @_;
4694: my $userinput = "$cmd:$tail";
4695: my ($cdom,$cnum) = split(':',$tail);
4696: my (%lastaccess,$qresult);
4697: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4698: if ($hashref) {
4699: while (my ($key,$value) = each(%$hashref)) {
4700: my ($unesc_key,$lasttime);
4701: $unesc_key = &unescape($key);
4702: if ($cnum) {
4703: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4704: }
4705: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4706: $lastaccess{$1} = $value;
4707: } else {
4708: my $items = &Apache::lonnet::thaw_unescape($value);
4709: if (ref($items) eq 'HASH') {
4710: unless ($lastaccess{$unesc_key}) {
4711: $lastaccess{$unesc_key} = '';
4712: }
4713: } else {
4714: my @courseitems = split(':',$value);
4715: $lastaccess{$unesc_key} = pop(@courseitems);
4716: }
4717: }
4718: }
4719: foreach my $cid (sort(keys(%lastaccess))) {
4720: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4721: }
4722: if (&untie_domain_hash($hashref)) {
4723: if ($qresult) {
4724: chop($qresult);
4725: }
4726: &Reply($client, \$qresult, $userinput);
4727: } else {
4728: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4729: "while attempting lastacourseaccess\n", $userinput);
4730: }
4731: } else {
4732: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4733: "while attempting lastcourseaccess\n", $userinput);
4734: }
4735: return 1;
4736: }
4737: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4738:
4739: #
4740: # Puts an unencrypted entry in a namespace db file at the domain level
4741: #
4742: # Parameters:
4743: # $cmd - The command that got us here.
4744: # $tail - Tail of the command (remaining parameters).
4745: # $client - File descriptor connected to client.
4746: # Returns
4747: # 0 - Requested to exit, caller should shut down.
4748: # 1 - Continue processing.
4749: # Side effects:
4750: # reply is written to $client.
4751: #
4752: sub put_domain_handler {
4753: my ($cmd,$tail,$client) = @_;
4754:
4755: my $userinput = "$cmd:$tail";
4756:
4757: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4758: chomp($what);
4759: my @pairs=split(/\&/,$what);
4760: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4761: "P", $what);
4762: if ($hashref) {
4763: foreach my $pair (@pairs) {
4764: my ($key,$value)=split(/=/,$pair);
4765: $hashref->{$key}=$value;
4766: }
4767: if (&untie_domain_hash($hashref)) {
4768: &Reply($client, "ok\n", $userinput);
4769: } else {
4770: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4771: "while attempting putdom\n", $userinput);
4772: }
4773: } else {
4774: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4775: "while attempting putdom\n", $userinput);
4776: }
4777:
4778: return 1;
4779: }
4780: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4781:
4782: # Updates one or more entries in clickers.db file at the domain level
4783: #
4784: # Parameters:
4785: # $cmd - The command that got us here.
4786: # $tail - Tail of the command (remaining parameters).
4787: # In this case a colon separated list containing:
4788: # (a) the domain for which we are updating the entries,
4789: # (b) the action required -- add or del -- and
4790: # (c) a &-separated list of entries to add or delete.
4791: # $client - File descriptor connected to client.
4792: # Returns
4793: # 1 - Continue processing.
4794: # 0 - Requested to exit, caller should shut down.
4795: # Side effects:
4796: # reply is written to $client.
4797: #
4798:
4799:
4800: sub update_clickers {
4801: my ($cmd, $tail, $client) = @_;
4802:
4803: my $userinput = "$cmd:$tail";
4804: my ($udom,$action,$what) =split(/:/,$tail,3);
4805: chomp($what);
4806:
4807: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
4808: "U","$action:$what");
4809:
4810: if (!$hashref) {
4811: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4812: "while attempting updateclickers\n", $userinput);
4813: return 1;
4814: }
4815:
4816: my @pairs=split(/\&/,$what);
4817: foreach my $pair (@pairs) {
4818: my ($key,$value)=split(/=/,$pair);
4819: if ($action eq 'add') {
4820: if (exists($hashref->{$key})) {
4821: my @newvals = split(/,/,&unescape($value));
4822: my @currvals = split(/,/,&unescape($hashref->{$key}));
4823: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
4824: $hashref->{$key}=&escape(join(',',@merged));
4825: } else {
4826: $hashref->{$key}=$value;
4827: }
4828: } elsif ($action eq 'del') {
4829: if (exists($hashref->{$key})) {
4830: my %current;
4831: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
4832: map { delete($current{$_}); } split(/,/,&unescape($value));
4833: if (keys(%current)) {
4834: $hashref->{$key}=&escape(join(',',sort(keys(%current))));
4835: } else {
4836: delete($hashref->{$key});
4837: }
4838: }
4839: }
4840: }
4841: if (&untie_user_hash($hashref)) {
4842: &Reply( $client, "ok\n", $userinput);
4843: } else {
4844: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
4845: "while attempting put\n",
4846: $userinput);
4847: }
4848: return 1;
4849: }
4850: ®ister_handler("updateclickers", \&update_clickers, 0, 1, 0);
4851:
4852:
4853: # Deletes one or more entries in a namespace db file at the domain level
4854: #
4855: # Parameters:
4856: # $cmd - The command that got us here.
4857: # $tail - Tail of the command (remaining parameters).
4858: # In this case a colon separated list containing:
4859: # (a) the domain for which we are deleting the entries,
4860: # (b) &-separated list of keys to delete.
4861: # $client - File descriptor connected to client.
4862: # Returns
4863: # 1 - Continue processing.
4864: # 0 - Requested to exit, caller should shut down.
4865: # Side effects:
4866: # reply is written to $client.
4867: #
4868:
4869: sub del_domain_handler {
4870: my ($cmd,$tail,$client) = @_;
4871:
4872: my $userinput = "$cmd:$tail";
4873:
4874: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4875: chomp($what);
4876: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
4877: "D", $what);
4878: if ($hashref) {
4879: my @keys=split(/\&/,$what);
4880: foreach my $key (@keys) {
4881: delete($hashref->{$key});
4882: }
4883: if (&untie_user_hash($hashref)) {
4884: &Reply($client, "ok\n", $userinput);
4885: } else {
4886: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4887: "while attempting deldom\n", $userinput);
4888: }
4889: } else {
4890: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4891: "while attempting deldom\n", $userinput);
4892: }
4893: return 1;
4894: }
4895: ®ister_handler("deldom", \&del_domain_handler, 0, 1, 0);
4896:
4897:
4898: # Unencrypted get from the namespace database file at the domain level.
4899: # This function retrieves a keyed item from a specific named database in the
4900: # domain directory.
4901: #
4902: # Parameters:
4903: # $cmd - Command request keyword (get).
4904: # $tail - Tail of the command. This is a colon separated list
4905: # consisting of the domain and the 'namespace'
4906: # which selects the gdbm file to do the lookup in,
4907: # & separated list of keys to lookup. Note that
4908: # the values are returned as an & separated list too.
4909: # $client - File descriptor open on the client.
4910: # Returns:
4911: # 1 - Continue processing.
4912: # 0 - Exit.
4913: # Side effects:
4914: # reply is written to $client.
4915: #
4916:
4917: sub get_domain_handler {
4918: my ($cmd, $tail, $client) = @_;
4919:
4920:
4921: my $userinput = "$cmd:$tail";
4922:
4923: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4924: chomp($what);
4925: if ($namespace =~ /^enc/) {
4926: &Failure( $client, "refused\n", $userinput);
4927: } else {
4928: my @queries=split(/\&/,$what);
4929: my $qresult='';
4930: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4931: if ($hashref) {
4932: for (my $i=0;$i<=$#queries;$i++) {
4933: $qresult.="$hashref->{$queries[$i]}&";
4934: }
4935: if (&untie_domain_hash($hashref)) {
4936: $qresult=~s/\&$//;
4937: &Reply($client, \$qresult, $userinput);
4938: } else {
4939: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4940: "while attempting getdom\n",$userinput);
4941: }
4942: } else {
4943: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4944: "while attempting getdom\n",$userinput);
4945: }
4946: }
4947:
4948: return 1;
4949: }
4950: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4951:
4952: sub encrypted_get_domain_handler {
4953: my ($cmd, $tail, $client) = @_;
4954:
4955: my $userinput = "$cmd:$tail";
4956:
4957: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4958: chomp($what);
4959: my @queries=split(/\&/,$what);
4960: my $qresult='';
4961: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4962: if ($hashref) {
4963: for (my $i=0;$i<=$#queries;$i++) {
4964: $qresult.="$hashref->{$queries[$i]}&";
4965: }
4966: if (&untie_domain_hash($hashref)) {
4967: $qresult=~s/\&$//;
4968: if ($cipher) {
4969: my $cmdlength=length($qresult);
4970: $qresult.=" ";
4971: my $encqresult='';
4972: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
4973: $encqresult.= unpack("H16",
4974: $cipher->encrypt(substr($qresult,
4975: $encidx,
4976: 8)));
4977: }
4978: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
4979: } else {
4980: &Failure( $client, "error:no_key\n", $userinput);
4981: }
4982: } else {
4983: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4984: "while attempting egetdom\n",$userinput);
4985: }
4986: } else {
4987: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4988: "while attempting egetdom\n",$userinput);
4989: }
4990: return 1;
4991: }
4992: ®ister_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0);
4993:
4994: #
4995: # Puts an id to a domains id database.
4996: #
4997: # Parameters:
4998: # $cmd - The command that triggered us.
4999: # $tail - Remainder of the request other than the command. This is a
5000: # colon separated list containing:
5001: # $domain - The domain for which we are writing the id.
5002: # $pairs - The id info to write... this is and & separated list
5003: # of keyword=value.
5004: # $client - Socket open on the client.
5005: # Returns:
5006: # 1 - Continue processing.
5007: # Side effects:
5008: # reply is written to $client.
5009: #
5010: sub put_id_handler {
5011: my ($cmd,$tail,$client) = @_;
5012:
5013:
5014: my $userinput = "$cmd:$tail";
5015:
5016: my ($udom,$what)=split(/:/,$tail);
5017: chomp($what);
5018: my @pairs=split(/\&/,$what);
5019: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
5020: "P", $what);
5021: if ($hashref) {
5022: foreach my $pair (@pairs) {
5023: my ($key,$value)=split(/=/,$pair);
5024: $hashref->{$key}=$value;
5025: }
5026: if (&untie_domain_hash($hashref)) {
5027: &Reply($client, "ok\n", $userinput);
5028: } else {
5029: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5030: "while attempting idput\n", $userinput);
5031: }
5032: } else {
5033: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5034: "while attempting idput\n", $userinput);
5035: }
5036:
5037: return 1;
5038: }
5039: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
5040:
5041: #
5042: # Retrieves a set of id values from the id database.
5043: # Returns an & separated list of results, one for each requested id to the
5044: # client.
5045: #
5046: # Parameters:
5047: # $cmd - Command keyword that caused us to be dispatched.
5048: # $tail - Tail of the command. Consists of a colon separated:
5049: # domain - the domain whose id table we dump
5050: # ids Consists of an & separated list of
5051: # id keywords whose values will be fetched.
5052: # nonexisting keywords will have an empty value.
5053: # $client - Socket open on the client.
5054: #
5055: # Returns:
5056: # 1 - indicating processing should continue.
5057: # Side effects:
5058: # An & separated list of results is written to $client.
5059: #
5060: sub get_id_handler {
5061: my ($cmd, $tail, $client) = @_;
5062:
5063:
5064: my $userinput = "$client:$tail";
5065:
5066: my ($udom,$what)=split(/:/,$tail);
5067: chomp($what);
5068: my @queries=split(/\&/,$what);
5069: my $qresult='';
5070: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
5071: if ($hashref) {
5072: for (my $i=0;$i<=$#queries;$i++) {
5073: $qresult.="$hashref->{$queries[$i]}&";
5074: }
5075: if (&untie_domain_hash($hashref)) {
5076: $qresult=~s/\&$//;
5077: &Reply($client, \$qresult, $userinput);
5078: } else {
5079: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
5080: "while attempting idget\n",$userinput);
5081: }
5082: } else {
5083: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5084: "while attempting idget\n",$userinput);
5085: }
5086:
5087: return 1;
5088: }
5089: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
5090:
5091: # Deletes one or more ids in a domain's id database.
5092: #
5093: # Parameters:
5094: # $cmd - Command keyword (iddel).
5095: # $tail - Command tail. In this case a colon
5096: # separated list containing:
5097: # The domain for which we are deleting the id(s).
5098: # &-separated list of id(s) to delete.
5099: # $client - File open on client socket.
5100: # Returns:
5101: # 1 - Continue processing
5102: # 0 - Exit server.
5103: #
5104: #
5105:
5106: sub del_id_handler {
5107: my ($cmd,$tail,$client) = @_;
5108:
5109: my $userinput = "$cmd:$tail";
5110:
5111: my ($udom,$what)=split(/:/,$tail);
5112: chomp($what);
5113: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
5114: "D", $what);
5115: if ($hashref) {
5116: my @keys=split(/\&/,$what);
5117: foreach my $key (@keys) {
5118: delete($hashref->{$key});
5119: }
5120: if (&untie_user_hash($hashref)) {
5121: &Reply($client, "ok\n", $userinput);
5122: } else {
5123: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5124: "while attempting iddel\n", $userinput);
5125: }
5126: } else {
5127: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5128: "while attempting iddel\n", $userinput);
5129: }
5130: return 1;
5131: }
5132: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
5133:
5134: #
5135: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
5136: #
5137: # Parameters
5138: # $cmd - Command keyword that caused us to be dispatched.
5139: # $tail - Tail of the command. Consists of a colon separated:
5140: # domain - the domain whose dcmail we are recording
5141: # email Consists of key=value pair
5142: # where key is unique msgid
5143: # and value is message (in XML)
5144: # $client - Socket open on the client.
5145: #
5146: # Returns:
5147: # 1 - indicating processing should continue.
5148: # Side effects
5149: # reply is written to $client.
5150: #
5151: sub put_dcmail_handler {
5152: my ($cmd,$tail,$client) = @_;
5153: my $userinput = "$cmd:$tail";
5154:
5155:
5156: my ($udom,$what)=split(/:/,$tail);
5157: chomp($what);
5158: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5159: if ($hashref) {
5160: my ($key,$value)=split(/=/,$what);
5161: $hashref->{$key}=$value;
5162: }
5163: if (&untie_domain_hash($hashref)) {
5164: &Reply($client, "ok\n", $userinput);
5165: } else {
5166: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5167: "while attempting dcmailput\n", $userinput);
5168: }
5169: return 1;
5170: }
5171: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
5172:
5173: #
5174: # Retrieves broadcast e-mail from nohist_dcmail database
5175: # Returns to client an & separated list of key=value pairs,
5176: # where key is msgid and value is message information.
5177: #
5178: # Parameters
5179: # $cmd - Command keyword that caused us to be dispatched.
5180: # $tail - Tail of the command. Consists of a colon separated:
5181: # domain - the domain whose dcmail table we dump
5182: # startfilter - beginning of time window
5183: # endfilter - end of time window
5184: # sendersfilter - & separated list of username:domain
5185: # for senders to search for.
5186: # $client - Socket open on the client.
5187: #
5188: # Returns:
5189: # 1 - indicating processing should continue.
5190: # Side effects
5191: # reply (& separated list of msgid=messageinfo pairs) is
5192: # written to $client.
5193: #
5194: sub dump_dcmail_handler {
5195: my ($cmd, $tail, $client) = @_;
5196:
5197: my $userinput = "$cmd:$tail";
5198: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
5199: chomp($sendersfilter);
5200: my @senders = ();
5201: if (defined($startfilter)) {
5202: $startfilter=&unescape($startfilter);
5203: } else {
5204: $startfilter='.';
5205: }
5206: if (defined($endfilter)) {
5207: $endfilter=&unescape($endfilter);
5208: } else {
5209: $endfilter='.';
5210: }
5211: if (defined($sendersfilter)) {
5212: $sendersfilter=&unescape($sendersfilter);
5213: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
5214: }
5215:
5216: my $qresult='';
5217: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5218: if ($hashref) {
5219: while (my ($key,$value) = each(%$hashref)) {
5220: my $match = 1;
5221: my ($timestamp,$subj,$uname,$udom) =
5222: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
5223: $subj = &unescape($subj);
5224: unless ($startfilter eq '.' || !defined($startfilter)) {
5225: if ($timestamp < $startfilter) {
5226: $match = 0;
5227: }
5228: }
5229: unless ($endfilter eq '.' || !defined($endfilter)) {
5230: if ($timestamp > $endfilter) {
5231: $match = 0;
5232: }
5233: }
5234: unless (@senders < 1) {
5235: unless (grep/^$uname:$udom$/,@senders) {
5236: $match = 0;
5237: }
5238: }
5239: if ($match == 1) {
5240: $qresult.=$key.'='.$value.'&';
5241: }
5242: }
5243: if (&untie_domain_hash($hashref)) {
5244: chop($qresult);
5245: &Reply($client, \$qresult, $userinput);
5246: } else {
5247: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5248: "while attempting dcmaildump\n", $userinput);
5249: }
5250: } else {
5251: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5252: "while attempting dcmaildump\n", $userinput);
5253: }
5254: return 1;
5255: }
5256:
5257: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
5258:
5259: #
5260: # Puts domain roles in nohist_domainroles database
5261: #
5262: # Parameters
5263: # $cmd - Command keyword that caused us to be dispatched.
5264: # $tail - Tail of the command. Consists of a colon separated:
5265: # domain - the domain whose roles we are recording
5266: # role - Consists of key=value pair
5267: # where key is unique role
5268: # and value is start/end date information
5269: # $client - Socket open on the client.
5270: #
5271: # Returns:
5272: # 1 - indicating processing should continue.
5273: # Side effects
5274: # reply is written to $client.
5275: #
5276:
5277: sub put_domainroles_handler {
5278: my ($cmd,$tail,$client) = @_;
5279:
5280: my $userinput = "$cmd:$tail";
5281: my ($udom,$what)=split(/:/,$tail);
5282: chomp($what);
5283: my @pairs=split(/\&/,$what);
5284: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5285: if ($hashref) {
5286: foreach my $pair (@pairs) {
5287: my ($key,$value)=split(/=/,$pair);
5288: $hashref->{$key}=$value;
5289: }
5290: if (&untie_domain_hash($hashref)) {
5291: &Reply($client, "ok\n", $userinput);
5292: } else {
5293: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5294: "while attempting domroleput\n", $userinput);
5295: }
5296: } else {
5297: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5298: "while attempting domroleput\n", $userinput);
5299: }
5300:
5301: return 1;
5302: }
5303:
5304: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
5305:
5306: #
5307: # Retrieves domain roles from nohist_domainroles database
5308: # Returns to client an & separated list of key=value pairs,
5309: # where key is role and value is start and end date information.
5310: #
5311: # Parameters
5312: # $cmd - Command keyword that caused us to be dispatched.
5313: # $tail - Tail of the command. Consists of a colon separated:
5314: # domain - the domain whose domain roles table we dump
5315: # $client - Socket open on the client.
5316: #
5317: # Returns:
5318: # 1 - indicating processing should continue.
5319: # Side effects
5320: # reply (& separated list of role=start/end info pairs) is
5321: # written to $client.
5322: #
5323: sub dump_domainroles_handler {
5324: my ($cmd, $tail, $client) = @_;
5325:
5326: my $userinput = "$cmd:$tail";
5327: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
5328: chomp($rolesfilter);
5329: my @roles = ();
5330: if (defined($startfilter)) {
5331: $startfilter=&unescape($startfilter);
5332: } else {
5333: $startfilter='.';
5334: }
5335: if (defined($endfilter)) {
5336: $endfilter=&unescape($endfilter);
5337: } else {
5338: $endfilter='.';
5339: }
5340: if (defined($rolesfilter)) {
5341: $rolesfilter=&unescape($rolesfilter);
5342: @roles = split(/\&/,$rolesfilter);
5343: }
5344:
5345: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5346: if ($hashref) {
5347: my $qresult = '';
5348: while (my ($key,$value) = each(%$hashref)) {
5349: my $match = 1;
5350: my ($end,$start) = split(/:/,&unescape($value));
5351: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
5352: unless (@roles < 1) {
5353: unless (grep/^\Q$trole\E$/,@roles) {
5354: $match = 0;
5355: next;
5356: }
5357: }
5358: unless ($startfilter eq '.' || !defined($startfilter)) {
5359: if ((defined($start)) && ($start >= $startfilter)) {
5360: $match = 0;
5361: next;
5362: }
5363: }
5364: unless ($endfilter eq '.' || !defined($endfilter)) {
5365: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
5366: $match = 0;
5367: next;
5368: }
5369: }
5370: if ($match == 1) {
5371: $qresult.=$key.'='.$value.'&';
5372: }
5373: }
5374: if (&untie_domain_hash($hashref)) {
5375: chop($qresult);
5376: &Reply($client, \$qresult, $userinput);
5377: } else {
5378: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5379: "while attempting domrolesdump\n", $userinput);
5380: }
5381: } else {
5382: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5383: "while attempting domrolesdump\n", $userinput);
5384: }
5385: return 1;
5386: }
5387:
5388: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
5389:
5390:
5391: # Process the tmpput command I'm not sure what this does.. Seems to
5392: # create a file in the lonDaemons/tmp directory of the form $id.tmp
5393: # where Id is the client's ip concatenated with a sequence number.
5394: # The file will contain some value that is passed in. Is this e.g.
5395: # a login token?
5396: #
5397: # Parameters:
5398: # $cmd - The command that got us dispatched.
5399: # $tail - The remainder of the request following $cmd:
5400: # In this case this will be the contents of the file.
5401: # $client - Socket connected to the client.
5402: # Returns:
5403: # 1 indicating processing can continue.
5404: # Side effects:
5405: # A file is created in the local filesystem.
5406: # A reply is sent to the client.
5407: sub tmp_put_handler {
5408: my ($cmd, $what, $client) = @_;
5409:
5410: my $userinput = "$cmd:$what"; # Reconstruct for logging.
5411:
5412: my ($record,$context) = split(/:/,$what);
5413: if ($context ne '') {
5414: chomp($context);
5415: $context = &unescape($context);
5416: }
5417: my ($id,$store);
5418: $tmpsnum++;
5419: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
5420: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
5421: } else {
5422: $id = $$.'_'.$clientip.'_'.$tmpsnum;
5423: }
5424: $id=~s/\W/\_/g;
5425: $record=~s/\n//g;
5426: my $execdir=$perlvar{'lonDaemons'};
5427: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
5428: print $store $record;
5429: close $store;
5430: &Reply($client, \$id, $userinput);
5431: } else {
5432: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5433: "while attempting tmpput\n", $userinput);
5434: }
5435: return 1;
5436:
5437: }
5438: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
5439:
5440: # Processes the tmpget command. This command returns the contents
5441: # of a temporary resource file(?) created via tmpput.
5442: #
5443: # Paramters:
5444: # $cmd - Command that got us dispatched.
5445: # $id - Tail of the command, contain the id of the resource
5446: # we want to fetch.
5447: # $client - socket open on the client.
5448: # Return:
5449: # 1 - Inidcating processing can continue.
5450: # Side effects:
5451: # A reply is sent to the client.
5452: #
5453: sub tmp_get_handler {
5454: my ($cmd, $id, $client) = @_;
5455:
5456: my $userinput = "$cmd:$id";
5457:
5458:
5459: $id=~s/\W/\_/g;
5460: my $store;
5461: my $execdir=$perlvar{'lonDaemons'};
5462: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
5463: my $reply=<$store>;
5464: &Reply( $client, \$reply, $userinput);
5465: close $store;
5466: } else {
5467: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5468: "while attempting tmpget\n", $userinput);
5469: }
5470:
5471: return 1;
5472: }
5473: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
5474:
5475: #
5476: # Process the tmpdel command. This command deletes a temp resource
5477: # created by the tmpput command.
5478: #
5479: # Parameters:
5480: # $cmd - Command that got us here.
5481: # $id - Id of the temporary resource created.
5482: # $client - socket open on the client process.
5483: #
5484: # Returns:
5485: # 1 - Indicating processing should continue.
5486: # Side Effects:
5487: # A file is deleted
5488: # A reply is sent to the client.
5489: sub tmp_del_handler {
5490: my ($cmd, $id, $client) = @_;
5491:
5492: my $userinput= "$cmd:$id";
5493:
5494: chomp($id);
5495: $id=~s/\W/\_/g;
5496: my $execdir=$perlvar{'lonDaemons'};
5497: if (unlink("$execdir/tmp/$id.tmp")) {
5498: &Reply($client, "ok\n", $userinput);
5499: } else {
5500: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
5501: "while attempting tmpdel\n", $userinput);
5502: }
5503:
5504: return 1;
5505:
5506: }
5507: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
5508:
5509: #
5510: # Processes the setannounce command. This command
5511: # creates a file named announce.txt in the top directory of
5512: # the documentn root and sets its contents. The announce.txt file is
5513: # printed in its entirety at the LonCAPA login page. Note:
5514: # once the announcement.txt fileis created it cannot be deleted.
5515: # However, setting the contents of the file to empty removes the
5516: # announcement from the login page of loncapa so who cares.
5517: #
5518: # Parameters:
5519: # $cmd - The command that got us dispatched.
5520: # $announcement - The text of the announcement.
5521: # $client - Socket open on the client process.
5522: # Retunrns:
5523: # 1 - Indicating request processing should continue
5524: # Side Effects:
5525: # The file {DocRoot}/announcement.txt is created.
5526: # A reply is sent to $client.
5527: #
5528: sub set_announce_handler {
5529: my ($cmd, $announcement, $client) = @_;
5530:
5531: my $userinput = "$cmd:$announcement";
5532:
5533: chomp($announcement);
5534: $announcement=&unescape($announcement);
5535: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
5536: '/announcement.txt')) {
5537: print $store $announcement;
5538: close $store;
5539: &Reply($client, "ok\n", $userinput);
5540: } else {
5541: &Failure($client, "error: ".($!+0)."\n", $userinput);
5542: }
5543:
5544: return 1;
5545: }
5546: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
5547:
5548: #
5549: # Return the version of the daemon. This can be used to determine
5550: # the compatibility of cross version installations or, alternatively to
5551: # simply know who's out of date and who isn't. Note that the version
5552: # is returned concatenated with the tail.
5553: # Parameters:
5554: # $cmd - the request that dispatched to us.
5555: # $tail - Tail of the request (client's version?).
5556: # $client - Socket open on the client.
5557: #Returns:
5558: # 1 - continue processing requests.
5559: # Side Effects:
5560: # Replies with version to $client.
5561: sub get_version_handler {
5562: my ($cmd, $tail, $client) = @_;
5563:
5564: my $userinput = $cmd.$tail;
5565:
5566: &Reply($client, &version($userinput)."\n", $userinput);
5567:
5568:
5569: return 1;
5570: }
5571: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
5572:
5573: # Set the current host and domain. This is used to support
5574: # multihomed systems. Each IP of the system, or even separate daemons
5575: # on the same IP can be treated as handling a separate lonCAPA virtual
5576: # machine. This command selects the virtual lonCAPA. The client always
5577: # knows the right one since it is lonc and it is selecting the domain/system
5578: # from the hosts.tab file.
5579: # Parameters:
5580: # $cmd - Command that dispatched us.
5581: # $tail - Tail of the command (domain/host requested).
5582: # $socket - Socket open on the client.
5583: #
5584: # Returns:
5585: # 1 - Indicates the program should continue to process requests.
5586: # Side-effects:
5587: # The default domain/system context is modified for this daemon.
5588: # a reply is sent to the client.
5589: #
5590: sub set_virtual_host_handler {
5591: my ($cmd, $tail, $socket) = @_;
5592:
5593: my $userinput ="$cmd:$tail";
5594:
5595: &Reply($client, &sethost($userinput)."\n", $userinput);
5596:
5597:
5598: return 1;
5599: }
5600: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
5601:
5602: # Process a request to exit:
5603: # - "bye" is sent to the client.
5604: # - The client socket is shutdown and closed.
5605: # - We indicate to the caller that we should exit.
5606: # Formal Parameters:
5607: # $cmd - The command that got us here.
5608: # $tail - Tail of the command (empty).
5609: # $client - Socket open on the tail.
5610: # Returns:
5611: # 0 - Indicating the program should exit!!
5612: #
5613: sub exit_handler {
5614: my ($cmd, $tail, $client) = @_;
5615:
5616: my $userinput = "$cmd:$tail";
5617:
5618: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5619: &Reply($client, "bye\n", $userinput);
5620: $client->shutdown(2); # shutdown the socket forcibly.
5621: $client->close();
5622:
5623: return 0;
5624: }
5625: ®ister_handler("exit", \&exit_handler, 0,1,1);
5626: ®ister_handler("init", \&exit_handler, 0,1,1);
5627: ®ister_handler("quit", \&exit_handler, 0,1,1);
5628:
5629: # Determine if auto-enrollment is enabled.
5630: # Note that the original had what I believe to be a defect.
5631: # The original returned 0 if the requestor was not a registerd client.
5632: # It should return "refused".
5633: # Formal Parameters:
5634: # $cmd - The command that invoked us.
5635: # $tail - The tail of the command (Extra command parameters.
5636: # $client - The socket open on the client that issued the request.
5637: # Returns:
5638: # 1 - Indicating processing should continue.
5639: #
5640: sub enrollment_enabled_handler {
5641: my ($cmd, $tail, $client) = @_;
5642: my $userinput = $cmd.":".$tail; # For logging purposes.
5643:
5644:
5645: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5646:
5647: my $outcome = &localenroll::run($cdom);
5648: &Reply($client, \$outcome, $userinput);
5649:
5650: return 1;
5651: }
5652: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5653:
5654: #
5655: # Validate an institutional code used for a LON-CAPA course.
5656: #
5657: # Formal Parameters:
5658: # $cmd - The command request that got us dispatched.
5659: # $tail - The tail of the command. In this case,
5660: # this is a colon separated set of words that will be split
5661: # into:
5662: # $dom - The domain for which the check of
5663: # institutional course code will occur.
5664: #
5665: # $instcode - The institutional code for the course
5666: # being requested, or validated for rights
5667: # to request.
5668: #
5669: # $owner - The course requestor (who will be the
5670: # course owner, in the form username:domain
5671: #
5672: # $client - Socket open on the client.
5673: # Returns:
5674: # 1 - Indicating processing should continue.
5675: #
5676: sub validate_instcode_handler {
5677: my ($cmd, $tail, $client) = @_;
5678: my $userinput = "$cmd:$tail";
5679: my ($dom,$instcode,$owner) = split(/:/, $tail);
5680: $instcode = &unescape($instcode);
5681: $owner = &unescape($owner);
5682: my ($outcome,$description,$credits) =
5683: &localenroll::validate_instcode($dom,$instcode,$owner);
5684: my $result = &escape($outcome).'&'.&escape($description).'&'.
5685: &escape($credits);
5686: &Reply($client, \$result, $userinput);
5687:
5688: return 1;
5689: }
5690: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5691:
5692: # Get the official sections for which auto-enrollment is possible.
5693: # Since the admin people won't know about 'unofficial sections'
5694: # we cannot auto-enroll on them.
5695: # Formal Parameters:
5696: # $cmd - The command request that got us dispatched here.
5697: # $tail - The remainder of the request. In our case this
5698: # will be split into:
5699: # $coursecode - The course name from the admin point of view.
5700: # $cdom - The course's domain(?).
5701: # $client - Socket open on the client.
5702: # Returns:
5703: # 1 - Indiciting processing should continue.
5704: #
5705: sub get_sections_handler {
5706: my ($cmd, $tail, $client) = @_;
5707: my $userinput = "$cmd:$tail";
5708:
5709: my ($coursecode, $cdom) = split(/:/, $tail);
5710: my @secs = &localenroll::get_sections($coursecode,$cdom);
5711: my $seclist = &escape(join(':',@secs));
5712:
5713: &Reply($client, \$seclist, $userinput);
5714:
5715:
5716: return 1;
5717: }
5718: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5719:
5720: # Validate the owner of a new course section.
5721: #
5722: # Formal Parameters:
5723: # $cmd - Command that got us dispatched.
5724: # $tail - the remainder of the command. For us this consists of a
5725: # colon separated string containing:
5726: # $inst - Course Id from the institutions point of view.
5727: # $owner - Proposed owner of the course.
5728: # $cdom - Domain of the course (from the institutions
5729: # point of view?)..
5730: # $client - Socket open on the client.
5731: #
5732: # Returns:
5733: # 1 - Processing should continue.
5734: #
5735: sub validate_course_owner_handler {
5736: my ($cmd, $tail, $client) = @_;
5737: my $userinput = "$cmd:$tail";
5738: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5739:
5740: $owner = &unescape($owner);
5741: $coowners = &unescape($coowners);
5742: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5743: &Reply($client, \$outcome, $userinput);
5744:
5745:
5746:
5747: return 1;
5748: }
5749: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5750:
5751: #
5752: # Validate a course section in the official schedule of classes
5753: # from the institutions point of view (part of autoenrollment).
5754: #
5755: # Formal Parameters:
5756: # $cmd - The command request that got us dispatched.
5757: # $tail - The tail of the command. In this case,
5758: # this is a colon separated set of words that will be split
5759: # into:
5760: # $inst_course_id - The course/section id from the
5761: # institutions point of view.
5762: # $cdom - The domain from the institutions
5763: # point of view.
5764: # $client - Socket open on the client.
5765: # Returns:
5766: # 1 - Indicating processing should continue.
5767: #
5768: sub validate_course_section_handler {
5769: my ($cmd, $tail, $client) = @_;
5770: my $userinput = "$cmd:$tail";
5771: my ($inst_course_id, $cdom) = split(/:/, $tail);
5772:
5773: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5774: &Reply($client, \$outcome, $userinput);
5775:
5776:
5777: return 1;
5778: }
5779: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5780:
5781: #
5782: # Validate course owner's access to enrollment data for specific class section.
5783: #
5784: #
5785: # Formal Parameters:
5786: # $cmd - The command request that got us dispatched.
5787: # $tail - The tail of the command. In this case this is a colon separated
5788: # set of values that will be split into:
5789: # $inst_class - Institutional code for the specific class section
5790: # $ownerlist - An escaped comma-separated list of username:domain
5791: # of the course owner, and co-owner(s).
5792: # $cdom - The domain of the course from the institution's
5793: # point of view.
5794: # $client - The socket open on the client.
5795: # Returns:
5796: # 1 - continue processing.
5797: #
5798:
5799: sub validate_class_access_handler {
5800: my ($cmd, $tail, $client) = @_;
5801: my $userinput = "$cmd:$tail";
5802: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5803: my $owners = &unescape($ownerlist);
5804: my $outcome;
5805: eval {
5806: local($SIG{__DIE__})='DEFAULT';
5807: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5808: };
5809: &Reply($client,\$outcome, $userinput);
5810:
5811: return 1;
5812: }
5813: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5814:
5815: #
5816: # Validate course owner or co-owners(s) access to enrollment data for all sections
5817: # and crosslistings for a particular course.
5818: #
5819: #
5820: # Formal Parameters:
5821: # $cmd - The command request that got us dispatched.
5822: # $tail - The tail of the command. In this case this is a colon separated
5823: # set of values that will be split into:
5824: # $ownerlist - An escaped comma-separated list of username:domain
5825: # of the course owner, and co-owner(s).
5826: # $cdom - The domain of the course from the institution's
5827: # point of view.
5828: # $classes - Frozen hash of institutional course sections and
5829: # crosslistings.
5830: # $client - The socket open on the client.
5831: # Returns:
5832: # 1 - continue processing.
5833: #
5834:
5835: sub validate_classes_handler {
5836: my ($cmd, $tail, $client) = @_;
5837: my $userinput = "$cmd:$tail";
5838: my ($ownerlist,$cdom,$classes) = split(/:/, $tail);
5839: my $classesref = &Apache::lonnet::thaw_unescape($classes);
5840: my $owners = &unescape($ownerlist);
5841: my $result;
5842: eval {
5843: local($SIG{__DIE__})='DEFAULT';
5844: my %validations;
5845: my $response = &localenroll::check_instclasses($owners,$cdom,$classesref,
5846: \%validations);
5847: if ($response eq 'ok') {
5848: foreach my $key (keys(%validations)) {
5849: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5850: }
5851: $result =~ s/\&$//;
5852: } else {
5853: $result = 'error';
5854: }
5855: };
5856: if (!$@) {
5857: &Reply($client, \$result, $userinput);
5858: } else {
5859: &Failure($client,"unknown_cmd\n",$userinput);
5860: }
5861: return 1;
5862: }
5863: ®ister_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0);
5864:
5865: #
5866: # Create a password for a new LON-CAPA user added by auto-enrollment.
5867: # Only used for case where authentication method for new user is localauth
5868: #
5869: # Formal Parameters:
5870: # $cmd - The command request that got us dispatched.
5871: # $tail - The tail of the command. In this case this is a colon separated
5872: # set of words that will be split into:
5873: # $authparam - An authentication parameter (localauth parameter).
5874: # $cdom - The domain of the course from the institution's
5875: # point of view.
5876: # $client - The socket open on the client.
5877: # Returns:
5878: # 1 - continue processing.
5879: #
5880: sub create_auto_enroll_password_handler {
5881: my ($cmd, $tail, $client) = @_;
5882: my $userinput = "$cmd:$tail";
5883:
5884: my ($authparam, $cdom) = split(/:/, $userinput);
5885:
5886: my ($create_passwd,$authchk);
5887: ($authparam,
5888: $create_passwd,
5889: $authchk) = &localenroll::create_password($authparam,$cdom);
5890:
5891: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5892: $userinput);
5893:
5894:
5895: return 1;
5896: }
5897: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5898: 0, 1, 0);
5899:
5900: sub auto_export_grades_handler {
5901: my ($cmd, $tail, $client) = @_;
5902: my $userinput = "$cmd:$tail";
5903: my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
5904: my $inforef = &Apache::lonnet::thaw_unescape($info);
5905: my $dataref = &Apache::lonnet::thaw_unescape($data);
5906: my ($outcome,$result);;
5907: eval {
5908: local($SIG{__DIE__})='DEFAULT';
5909: my %rtnhash;
5910: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
5911: if ($outcome eq 'ok') {
5912: foreach my $key (keys(%rtnhash)) {
5913: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5914: }
5915: $result =~ s/\&$//;
5916: }
5917: };
5918: if (!$@) {
5919: if ($outcome eq 'ok') {
5920: if ($cipher) {
5921: my $cmdlength=length($result);
5922: $result.=" ";
5923: my $encresult='';
5924: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
5925: $encresult.= unpack("H16",
5926: $cipher->encrypt(substr($result,
5927: $encidx,
5928: 8)));
5929: }
5930: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
5931: } else {
5932: &Failure( $client, "error:no_key\n", $userinput);
5933: }
5934: } else {
5935: &Reply($client, "$outcome\n", $userinput);
5936: }
5937: } else {
5938: &Failure($client,"export_error\n",$userinput);
5939: }
5940: return 1;
5941: }
5942: ®ister_handler("autoexportgrades", \&auto_export_grades_handler,
5943: 1, 1, 0);
5944:
5945: # Retrieve and remove temporary files created by/during autoenrollment.
5946: #
5947: # Formal Parameters:
5948: # $cmd - The command that got us dispatched.
5949: # $tail - The tail of the command. In our case this is a colon
5950: # separated list that will be split into:
5951: # $filename - The name of the file to retrieve.
5952: # The filename is given as a path relative to
5953: # the LonCAPA temp file directory.
5954: # $client - Socket open on the client.
5955: #
5956: # Returns:
5957: # 1 - Continue processing.
5958: sub retrieve_auto_file_handler {
5959: my ($cmd, $tail, $client) = @_;
5960: my $userinput = "cmd:$tail";
5961:
5962: my ($filename) = split(/:/, $tail);
5963:
5964: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5965:
5966: if ($filename =~m{/\.\./}) {
5967: &Failure($client, "refused\n", $userinput);
5968: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
5969: &Failure($client, "refused\n", $userinput);
5970: } elsif ( (-e $source) && ($filename ne '') ) {
5971: my $reply = '';
5972: if (open(my $fh,$source)) {
5973: while (<$fh>) {
5974: chomp($_);
5975: $_ =~ s/^\s+//g;
5976: $_ =~ s/\s+$//g;
5977: $reply .= $_;
5978: }
5979: close($fh);
5980: &Reply($client, &escape($reply)."\n", $userinput);
5981:
5982: # Does this have to be uncommented??!? (RF).
5983: #
5984: # unlink($source);
5985: } else {
5986: &Failure($client, "error\n", $userinput);
5987: }
5988: } else {
5989: &Failure($client, "error\n", $userinput);
5990: }
5991:
5992:
5993: return 1;
5994: }
5995: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5996:
5997: sub crsreq_checks_handler {
5998: my ($cmd, $tail, $client) = @_;
5999: my $userinput = "$cmd:$tail";
6000: my $dom = $tail;
6001: my $result;
6002: my @reqtypes = ('official','unofficial','community','textbook','placement');
6003: eval {
6004: local($SIG{__DIE__})='DEFAULT';
6005: my %validations;
6006: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
6007: \%validations);
6008: if ($response eq 'ok') {
6009: foreach my $key (keys(%validations)) {
6010: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
6011: }
6012: $result =~ s/\&$//;
6013: } else {
6014: $result = 'error';
6015: }
6016: };
6017: if (!$@) {
6018: &Reply($client, \$result, $userinput);
6019: } else {
6020: &Failure($client,"unknown_cmd\n",$userinput);
6021: }
6022: return 1;
6023: }
6024: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
6025:
6026: sub validate_crsreq_handler {
6027: my ($cmd, $tail, $client) = @_;
6028: my $userinput = "$cmd:$tail";
6029: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
6030: $instcode = &unescape($instcode);
6031: $owner = &unescape($owner);
6032: $crstype = &unescape($crstype);
6033: $inststatuslist = &unescape($inststatuslist);
6034: $instcode = &unescape($instcode);
6035: $instseclist = &unescape($instseclist);
6036: my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
6037: my $outcome;
6038: eval {
6039: local($SIG{__DIE__})='DEFAULT';
6040: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
6041: $inststatuslist,$instcode,
6042: $instseclist,$custominfo);
6043: };
6044: if (!$@) {
6045: &Reply($client, \$outcome, $userinput);
6046: } else {
6047: &Failure($client,"unknown_cmd\n",$userinput);
6048: }
6049: return 1;
6050: }
6051: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
6052:
6053: sub crsreq_update_handler {
6054: my ($cmd, $tail, $client) = @_;
6055: my $userinput = "$cmd:$tail";
6056: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
6057: $accessstart,$accessend,$infohashref) =
6058: split(/:/, $tail);
6059: $crstype = &unescape($crstype);
6060: $action = &unescape($action);
6061: $ownername = &unescape($ownername);
6062: $ownerdomain = &unescape($ownerdomain);
6063: $fullname = &unescape($fullname);
6064: $title = &unescape($title);
6065: $code = &unescape($code);
6066: $accessstart = &unescape($accessstart);
6067: $accessend = &unescape($accessend);
6068: my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
6069: my ($result,$outcome);
6070: eval {
6071: local($SIG{__DIE__})='DEFAULT';
6072: my %rtnhash;
6073: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
6074: $ownername,$ownerdomain,$fullname,
6075: $title,$code,$accessstart,$accessend,
6076: $incoming,\%rtnhash);
6077: if ($outcome eq 'ok') {
6078: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
6079: foreach my $key (keys(%rtnhash)) {
6080: if (grep(/^\Q$key\E/,@posskeys)) {
6081: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
6082: }
6083: }
6084: $result =~ s/\&$//;
6085: }
6086: };
6087: if (!$@) {
6088: if ($outcome eq 'ok') {
6089: &Reply($client, \$result, $userinput);
6090: } else {
6091: &Reply($client, "format_error\n", $userinput);
6092: }
6093: } else {
6094: &Failure($client,"unknown_cmd\n",$userinput);
6095: }
6096: return 1;
6097: }
6098: ®ister_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
6099:
6100: #
6101: # Read and retrieve institutional code format (for support form).
6102: # Formal Parameters:
6103: # $cmd - Command that dispatched us.
6104: # $tail - Tail of the command. In this case it conatins
6105: # the course domain and the coursename.
6106: # $client - Socket open on the client.
6107: # Returns:
6108: # 1 - Continue processing.
6109: #
6110: sub get_institutional_code_format_handler {
6111: my ($cmd, $tail, $client) = @_;
6112: my $userinput = "$cmd:$tail";
6113:
6114: my $reply;
6115: my($cdom,$course) = split(/:/,$tail);
6116: my @pairs = split/\&/,$course;
6117: my %instcodes = ();
6118: my %codes = ();
6119: my @codetitles = ();
6120: my %cat_titles = ();
6121: my %cat_order = ();
6122: foreach (@pairs) {
6123: my ($key,$value) = split/=/,$_;
6124: $instcodes{&unescape($key)} = &unescape($value);
6125: }
6126: my $formatreply = &localenroll::instcode_format($cdom,
6127: \%instcodes,
6128: \%codes,
6129: \@codetitles,
6130: \%cat_titles,
6131: \%cat_order);
6132: if ($formatreply eq 'ok') {
6133: my $codes_str = &Apache::lonnet::hash2str(%codes);
6134: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
6135: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
6136: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
6137: &Reply($client,
6138: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
6139: .$cat_order_str."\n",
6140: $userinput);
6141: } else {
6142: # this else branch added by RF since if not ok, lonc will
6143: # hang waiting on reply until timeout.
6144: #
6145: &Reply($client, "format_error\n", $userinput);
6146: }
6147:
6148: return 1;
6149: }
6150: ®ister_handler("autoinstcodeformat",
6151: \&get_institutional_code_format_handler,0,1,0);
6152:
6153: sub get_institutional_defaults_handler {
6154: my ($cmd, $tail, $client) = @_;
6155: my $userinput = "$cmd:$tail";
6156:
6157: my $dom = $tail;
6158: my %defaults_hash;
6159: my @code_order;
6160: my $outcome;
6161: eval {
6162: local($SIG{__DIE__})='DEFAULT';
6163: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
6164: \@code_order);
6165: };
6166: if (!$@) {
6167: if ($outcome eq 'ok') {
6168: my $result='';
6169: while (my ($key,$value) = each(%defaults_hash)) {
6170: $result.=&escape($key).'='.&escape($value).'&';
6171: }
6172: $result .= 'code_order='.&escape(join('&',@code_order));
6173: &Reply($client,\$result,$userinput);
6174: } else {
6175: &Reply($client,"error\n", $userinput);
6176: }
6177: } else {
6178: &Failure($client,"unknown_cmd\n",$userinput);
6179: }
6180: }
6181: ®ister_handler("autoinstcodedefaults",
6182: \&get_institutional_defaults_handler,0,1,0);
6183:
6184: sub get_possible_instcodes_handler {
6185: my ($cmd, $tail, $client) = @_;
6186: my $userinput = "$cmd:$tail";
6187:
6188: my $reply;
6189: my $cdom = $tail;
6190: my (@codetitles,%cat_titles,%cat_order,@code_order);
6191: my $formatreply = &localenroll::possible_instcodes($cdom,
6192: \@codetitles,
6193: \%cat_titles,
6194: \%cat_order,
6195: \@code_order);
6196: if ($formatreply eq 'ok') {
6197: my $result = join('&',map {&escape($_);} (@codetitles)).':';
6198: $result .= join('&',map {&escape($_);} (@code_order)).':';
6199: foreach my $key (keys(%cat_titles)) {
6200: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
6201: }
6202: $result =~ s/\&$//;
6203: $result .= ':';
6204: foreach my $key (keys(%cat_order)) {
6205: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
6206: }
6207: $result =~ s/\&$//;
6208: &Reply($client,\$result,$userinput);
6209: } else {
6210: &Reply($client, "format_error\n", $userinput);
6211: }
6212: return 1;
6213: }
6214: ®ister_handler("autopossibleinstcodes",
6215: \&get_possible_instcodes_handler,0,1,0);
6216:
6217: sub get_institutional_user_rules {
6218: my ($cmd, $tail, $client) = @_;
6219: my $userinput = "$cmd:$tail";
6220: my $dom = &unescape($tail);
6221: my (%rules_hash,@rules_order);
6222: my $outcome;
6223: eval {
6224: local($SIG{__DIE__})='DEFAULT';
6225: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
6226: };
6227: if (!$@) {
6228: if ($outcome eq 'ok') {
6229: my $result;
6230: foreach my $key (keys(%rules_hash)) {
6231: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6232: }
6233: $result =~ s/\&$//;
6234: $result .= ':';
6235: if (@rules_order > 0) {
6236: foreach my $item (@rules_order) {
6237: $result .= &escape($item).'&';
6238: }
6239: }
6240: $result =~ s/\&$//;
6241: &Reply($client,\$result,$userinput);
6242: } else {
6243: &Reply($client,"error\n", $userinput);
6244: }
6245: } else {
6246: &Failure($client,"unknown_cmd\n",$userinput);
6247: }
6248: }
6249: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
6250:
6251: sub get_institutional_id_rules {
6252: my ($cmd, $tail, $client) = @_;
6253: my $userinput = "$cmd:$tail";
6254: my $dom = &unescape($tail);
6255: my (%rules_hash,@rules_order);
6256: my $outcome;
6257: eval {
6258: local($SIG{__DIE__})='DEFAULT';
6259: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
6260: };
6261: if (!$@) {
6262: if ($outcome eq 'ok') {
6263: my $result;
6264: foreach my $key (keys(%rules_hash)) {
6265: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6266: }
6267: $result =~ s/\&$//;
6268: $result .= ':';
6269: if (@rules_order > 0) {
6270: foreach my $item (@rules_order) {
6271: $result .= &escape($item).'&';
6272: }
6273: }
6274: $result =~ s/\&$//;
6275: &Reply($client,\$result,$userinput);
6276: } else {
6277: &Reply($client,"error\n", $userinput);
6278: }
6279: } else {
6280: &Failure($client,"unknown_cmd\n",$userinput);
6281: }
6282: }
6283: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
6284:
6285: sub get_institutional_selfcreate_rules {
6286: my ($cmd, $tail, $client) = @_;
6287: my $userinput = "$cmd:$tail";
6288: my $dom = &unescape($tail);
6289: my (%rules_hash,@rules_order);
6290: my $outcome;
6291: eval {
6292: local($SIG{__DIE__})='DEFAULT';
6293: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
6294: };
6295: if (!$@) {
6296: if ($outcome eq 'ok') {
6297: my $result;
6298: foreach my $key (keys(%rules_hash)) {
6299: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6300: }
6301: $result =~ s/\&$//;
6302: $result .= ':';
6303: if (@rules_order > 0) {
6304: foreach my $item (@rules_order) {
6305: $result .= &escape($item).'&';
6306: }
6307: }
6308: $result =~ s/\&$//;
6309: &Reply($client,\$result,$userinput);
6310: } else {
6311: &Reply($client,"error\n", $userinput);
6312: }
6313: } else {
6314: &Failure($client,"unknown_cmd\n",$userinput);
6315: }
6316: }
6317: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
6318:
6319:
6320: sub institutional_username_check {
6321: my ($cmd, $tail, $client) = @_;
6322: my $userinput = "$cmd:$tail";
6323: my %rulecheck;
6324: my $outcome;
6325: my ($udom,$uname,@rules) = split(/:/,$tail);
6326: $udom = &unescape($udom);
6327: $uname = &unescape($uname);
6328: @rules = map {&unescape($_);} (@rules);
6329: eval {
6330: local($SIG{__DIE__})='DEFAULT';
6331: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
6332: };
6333: if (!$@) {
6334: if ($outcome eq 'ok') {
6335: my $result='';
6336: foreach my $key (keys(%rulecheck)) {
6337: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6338: }
6339: &Reply($client,\$result,$userinput);
6340: } else {
6341: &Reply($client,"error\n", $userinput);
6342: }
6343: } else {
6344: &Failure($client,"unknown_cmd\n",$userinput);
6345: }
6346: }
6347: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
6348:
6349: sub institutional_id_check {
6350: my ($cmd, $tail, $client) = @_;
6351: my $userinput = "$cmd:$tail";
6352: my %rulecheck;
6353: my $outcome;
6354: my ($udom,$id,@rules) = split(/:/,$tail);
6355: $udom = &unescape($udom);
6356: $id = &unescape($id);
6357: @rules = map {&unescape($_);} (@rules);
6358: eval {
6359: local($SIG{__DIE__})='DEFAULT';
6360: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
6361: };
6362: if (!$@) {
6363: if ($outcome eq 'ok') {
6364: my $result='';
6365: foreach my $key (keys(%rulecheck)) {
6366: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6367: }
6368: &Reply($client,\$result,$userinput);
6369: } else {
6370: &Reply($client,"error\n", $userinput);
6371: }
6372: } else {
6373: &Failure($client,"unknown_cmd\n",$userinput);
6374: }
6375: }
6376: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
6377:
6378: sub institutional_selfcreate_check {
6379: my ($cmd, $tail, $client) = @_;
6380: my $userinput = "$cmd:$tail";
6381: my %rulecheck;
6382: my $outcome;
6383: my ($udom,$email,@rules) = split(/:/,$tail);
6384: $udom = &unescape($udom);
6385: $email = &unescape($email);
6386: @rules = map {&unescape($_);} (@rules);
6387: eval {
6388: local($SIG{__DIE__})='DEFAULT';
6389: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
6390: };
6391: if (!$@) {
6392: if ($outcome eq 'ok') {
6393: my $result='';
6394: foreach my $key (keys(%rulecheck)) {
6395: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6396: }
6397: &Reply($client,\$result,$userinput);
6398: } else {
6399: &Reply($client,"error\n", $userinput);
6400: }
6401: } else {
6402: &Failure($client,"unknown_cmd\n",$userinput);
6403: }
6404: }
6405: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
6406:
6407: # Get domain specific conditions for import of student photographs to a course
6408: #
6409: # Retrieves information from photo_permission subroutine in localenroll.
6410: # Returns outcome (ok) if no processing errors, and whether course owner is
6411: # required to accept conditions of use (yes/no).
6412: #
6413: #
6414: sub photo_permission_handler {
6415: my ($cmd, $tail, $client) = @_;
6416: my $userinput = "$cmd:$tail";
6417: my $cdom = $tail;
6418: my ($perm_reqd,$conditions);
6419: my $outcome;
6420: eval {
6421: local($SIG{__DIE__})='DEFAULT';
6422: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
6423: \$conditions);
6424: };
6425: if (!$@) {
6426: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
6427: $userinput);
6428: } else {
6429: &Failure($client,"unknown_cmd\n",$userinput);
6430: }
6431: return 1;
6432: }
6433: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
6434:
6435: #
6436: # Checks if student photo is available for a user in the domain, in the user's
6437: # directory (in /userfiles/internal/studentphoto.jpg).
6438: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
6439: # the student's photo.
6440:
6441: sub photo_check_handler {
6442: my ($cmd, $tail, $client) = @_;
6443: my $userinput = "$cmd:$tail";
6444: my ($udom,$uname,$pid) = split(/:/,$tail);
6445: $udom = &unescape($udom);
6446: $uname = &unescape($uname);
6447: $pid = &unescape($pid);
6448: my $path=&propath($udom,$uname).'/userfiles/internal/';
6449: if (!-e $path) {
6450: &mkpath($path);
6451: }
6452: my $response;
6453: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
6454: $result .= ':'.$response;
6455: &Reply($client, &escape($result)."\n",$userinput);
6456: return 1;
6457: }
6458: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
6459:
6460: #
6461: # Retrieve information from localenroll about whether to provide a button
6462: # for users who have enbled import of student photos to initiate an
6463: # update of photo files for registered students. Also include
6464: # comment to display alongside button.
6465:
6466: sub photo_choice_handler {
6467: my ($cmd, $tail, $client) = @_;
6468: my $userinput = "$cmd:$tail";
6469: my $cdom = &unescape($tail);
6470: my ($update,$comment);
6471: eval {
6472: local($SIG{__DIE__})='DEFAULT';
6473: ($update,$comment) = &localenroll::manager_photo_update($cdom);
6474: };
6475: if (!$@) {
6476: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
6477: } else {
6478: &Failure($client,"unknown_cmd\n",$userinput);
6479: }
6480: return 1;
6481: }
6482: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
6483:
6484: #
6485: # Gets a student's photo to exist (in the correct image type) in the user's
6486: # directory.
6487: # Formal Parameters:
6488: # $cmd - The command request that got us dispatched.
6489: # $tail - A colon separated set of words that will be split into:
6490: # $domain - student's domain
6491: # $uname - student username
6492: # $type - image type desired
6493: # $client - The socket open on the client.
6494: # Returns:
6495: # 1 - continue processing.
6496:
6497: sub student_photo_handler {
6498: my ($cmd, $tail, $client) = @_;
6499: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
6500:
6501: my $path=&propath($domain,$uname). '/userfiles/internal/';
6502: my $filename = 'studentphoto.'.$ext;
6503: if ($type eq 'thumbnail') {
6504: $filename = 'studentphoto_tn.'.$ext;
6505: }
6506: if (-e $path.$filename) {
6507: &Reply($client,"ok\n","$cmd:$tail");
6508: return 1;
6509: }
6510: &mkpath($path);
6511: my $file;
6512: if ($type eq 'thumbnail') {
6513: eval {
6514: local($SIG{__DIE__})='DEFAULT';
6515: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
6516: };
6517: } else {
6518: $file=&localstudentphoto::fetch($domain,$uname);
6519: }
6520: if (!$file) {
6521: &Failure($client,"unavailable\n","$cmd:$tail");
6522: return 1;
6523: }
6524: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
6525: if (-e $path.$filename) {
6526: &Reply($client,"ok\n","$cmd:$tail");
6527: return 1;
6528: }
6529: &Failure($client,"unable_to_convert\n","$cmd:$tail");
6530: return 1;
6531: }
6532: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
6533:
6534: sub inst_usertypes_handler {
6535: my ($cmd, $domain, $client) = @_;
6536: my $res;
6537: my $userinput = $cmd.":".$domain; # For logging purposes.
6538: my (%typeshash,@order,$result);
6539: eval {
6540: local($SIG{__DIE__})='DEFAULT';
6541: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
6542: };
6543: if ($result eq 'ok') {
6544: if (keys(%typeshash) > 0) {
6545: foreach my $key (keys(%typeshash)) {
6546: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
6547: }
6548: }
6549: $res=~s/\&$//;
6550: $res .= ':';
6551: if (@order > 0) {
6552: foreach my $item (@order) {
6553: $res .= &escape($item).'&';
6554: }
6555: }
6556: $res=~s/\&$//;
6557: }
6558: &Reply($client, \$res, $userinput);
6559: return 1;
6560: }
6561: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
6562:
6563: # mkpath makes all directories for a file, expects an absolute path with a
6564: # file or a trailing / if just a dir is passed
6565: # returns 1 on success 0 on failure
6566: sub mkpath {
6567: my ($file)=@_;
6568: my @parts=split(/\//,$file,-1);
6569: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
6570: for (my $i=3;$i<= ($#parts-1);$i++) {
6571: $now.='/'.$parts[$i];
6572: if (!-e $now) {
6573: if (!mkdir($now,0770)) { return 0; }
6574: }
6575: }
6576: return 1;
6577: }
6578:
6579: #---------------------------------------------------------------
6580: #
6581: # Getting, decoding and dispatching requests:
6582: #
6583: #
6584: # Get a Request:
6585: # Gets a Request message from the client. The transaction
6586: # is defined as a 'line' of text. We remove the new line
6587: # from the text line.
6588: #
6589: sub get_request {
6590: my $input = <$client>;
6591: chomp($input);
6592:
6593: &Debug("get_request: Request = $input\n");
6594:
6595: &status('Processing '.$clientname.':'.$input);
6596:
6597: return $input;
6598: }
6599: #---------------------------------------------------------------
6600: #
6601: # Process a request. This sub should shrink as each action
6602: # gets farmed out into a separat sub that is registered
6603: # with the dispatch hash.
6604: #
6605: # Parameters:
6606: # user_input - The request received from the client (lonc).
6607: #
6608: # Returns:
6609: # true to keep processing, false if caller should exit.
6610: #
6611: sub process_request {
6612: my ($userinput) = @_; # Easier for now to break style than to
6613: # fix all the userinput -> user_input.
6614: my $wasenc = 0; # True if request was encrypted.
6615: # ------------------------------------------------------------ See if encrypted
6616: # for command
6617: # sethost:<server>
6618: # <command>:<args>
6619: # we just send it to the processor
6620: # for
6621: # sethost:<server>:<command>:<args>
6622: # we do the implict set host and then do the command
6623: if ($userinput =~ /^sethost:/) {
6624: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
6625: if (defined($userinput)) {
6626: &sethost("$cmd:$newid");
6627: } else {
6628: $userinput = "$cmd:$newid";
6629: }
6630: }
6631:
6632: if ($userinput =~ /^enc/) {
6633: $userinput = decipher($userinput);
6634: $wasenc=1;
6635: if(!$userinput) { # Cipher not defined.
6636: &Failure($client, "error: Encrypted data without negotated key\n");
6637: return 0;
6638: }
6639: }
6640: Debug("process_request: $userinput\n");
6641:
6642: #
6643: # The 'correct way' to add a command to lond is now to
6644: # write a sub to execute it and Add it to the command dispatch
6645: # hash via a call to register_handler.. The comments to that
6646: # sub should give you enough to go on to show how to do this
6647: # along with the examples that are building up as this code
6648: # is getting refactored. Until all branches of the
6649: # if/elseif monster below have been factored out into
6650: # separate procesor subs, if the dispatch hash is missing
6651: # the command keyword, we will fall through to the remainder
6652: # of the if/else chain below in order to keep this thing in
6653: # working order throughout the transmogrification.
6654:
6655: my ($command, $tail) = split(/:/, $userinput, 2);
6656: chomp($command);
6657: chomp($tail);
6658: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
6659: $command =~ s/(\r)//; # And this too for parameterless commands.
6660: if(!$tail) {
6661: $tail =""; # defined but blank.
6662: }
6663:
6664: &Debug("Command received: $command, encoded = $wasenc");
6665:
6666: if(defined $Dispatcher{$command}) {
6667:
6668: my $dispatch_info = $Dispatcher{$command};
6669: my $handler = $$dispatch_info[0];
6670: my $need_encode = $$dispatch_info[1];
6671: my $client_types = $$dispatch_info[2];
6672: Debug("Matched dispatch hash: mustencode: $need_encode "
6673: ."ClientType $client_types");
6674:
6675: # Validate the request:
6676:
6677: my $ok = 1;
6678: my $requesterprivs = 0;
6679: if(&isClient()) {
6680: $requesterprivs |= $CLIENT_OK;
6681: }
6682: if(&isManager()) {
6683: $requesterprivs |= $MANAGER_OK;
6684: }
6685: if($need_encode && (!$wasenc)) {
6686: Debug("Must encode but wasn't: $need_encode $wasenc");
6687: $ok = 0;
6688: }
6689: if(($client_types & $requesterprivs) == 0) {
6690: Debug("Client not privileged to do this operation");
6691: $ok = 0;
6692: }
6693: if ($ok) {
6694: my $realcommand = $command;
6695: if ($command eq 'querysend') {
6696: my ($query,$rest)=split(/\:/,$tail,2);
6697: $query=~s/\n*$//g;
6698: my @possqueries =
6699: qw(userlog courselog fetchenrollment institutionalphotos usersearch instdirsearch getinstuser getmultinstusers);
6700: if (grep(/^\Q$query\E$/,@possqueries)) {
6701: $command .= '_'.$query;
6702: } elsif ($query eq 'prepare activity log') {
6703: $command .= '_activitylog';
6704: }
6705: }
6706: if (ref($trust{$command}) eq 'HASH') {
6707: my $donechecks;
6708: if ($trust{$command}{'anywhere'}) {
6709: $donechecks = 1;
6710: } elsif ($trust{$command}{'manageronly'}) {
6711: unless (&isManager()) {
6712: $ok = 0;
6713: }
6714: $donechecks = 1;
6715: } elsif ($trust{$command}{'institutiononly'}) {
6716: unless ($clientsameinst) {
6717: $ok = 0;
6718: }
6719: $donechecks = 1;
6720: } elsif ($clientsameinst) {
6721: $donechecks = 1;
6722: }
6723: unless ($donechecks) {
6724: foreach my $rule (keys(%{$trust{$command}})) {
6725: next if ($rule eq 'remote');
6726: if ($trust{$command}{$rule}) {
6727: if ($clientprohibited{$rule}) {
6728: $ok = 0;
6729: } else {
6730: $ok = 1;
6731: $donechecks = 1;
6732: last;
6733: }
6734: }
6735: }
6736: }
6737: unless ($donechecks) {
6738: if ($trust{$command}{'remote'}) {
6739: if ($clientremoteok) {
6740: $ok = 1;
6741: } else {
6742: $ok = 0;
6743: }
6744: }
6745: }
6746: }
6747: $command = $realcommand;
6748: }
6749:
6750: if($ok) {
6751: Debug("Dispatching to handler $command $tail");
6752: my $keep_going = &$handler($command, $tail, $client);
6753: return $keep_going;
6754: } else {
6755: Debug("Refusing to dispatch because client did not match requirements");
6756: Failure($client, "refused\n", $userinput);
6757: return 1;
6758: }
6759: }
6760:
6761: print $client "unknown_cmd\n";
6762: # -------------------------------------------------------------------- complete
6763: Debug("process_request - returning 1");
6764: return 1;
6765: }
6766: #
6767: # Decipher encoded traffic
6768: # Parameters:
6769: # input - Encoded data.
6770: # Returns:
6771: # Decoded data or undef if encryption key was not yet negotiated.
6772: # Implicit input:
6773: # cipher - This global holds the negotiated encryption key.
6774: #
6775: sub decipher {
6776: my ($input) = @_;
6777: my $output = '';
6778:
6779:
6780: if($cipher) {
6781: my($enc, $enclength, $encinput) = split(/:/, $input);
6782: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
6783: $output .=
6784: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
6785: }
6786: return substr($output, 0, $enclength);
6787: } else {
6788: return undef;
6789: }
6790: }
6791:
6792: #
6793: # Register a command processor. This function is invoked to register a sub
6794: # to process a request. Once registered, the ProcessRequest sub can automatically
6795: # dispatch requests to an appropriate sub, and do the top level validity checking
6796: # as well:
6797: # - Is the keyword recognized.
6798: # - Is the proper client type attempting the request.
6799: # - Is the request encrypted if it has to be.
6800: # Parameters:
6801: # $request_name - Name of the request being registered.
6802: # This is the command request that will match
6803: # against the hash keywords to lookup the information
6804: # associated with the dispatch information.
6805: # $procedure - Reference to a sub to call to process the request.
6806: # All subs get called as follows:
6807: # Procedure($cmd, $tail, $replyfd, $key)
6808: # $cmd - the actual keyword that invoked us.
6809: # $tail - the tail of the request that invoked us.
6810: # $replyfd- File descriptor connected to the client
6811: # $must_encode - True if the request must be encoded to be good.
6812: # $client_ok - True if it's ok for a client to request this.
6813: # $manager_ok - True if it's ok for a manager to request this.
6814: # Side effects:
6815: # - On success, the Dispatcher hash has an entry added for the key $RequestName
6816: # - On failure, the program will die as it's a bad internal bug to try to
6817: # register a duplicate command handler.
6818: #
6819: sub register_handler {
6820: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
6821:
6822: # Don't allow duplication#
6823:
6824: if (defined $Dispatcher{$request_name}) {
6825: die "Attempting to define a duplicate request handler for $request_name\n";
6826: }
6827: # Build the client type mask:
6828:
6829: my $client_type_mask = 0;
6830: if($client_ok) {
6831: $client_type_mask |= $CLIENT_OK;
6832: }
6833: if($manager_ok) {
6834: $client_type_mask |= $MANAGER_OK;
6835: }
6836:
6837: # Enter the hash:
6838:
6839: my @entry = ($procedure, $must_encode, $client_type_mask);
6840:
6841: $Dispatcher{$request_name} = \@entry;
6842:
6843: }
6844:
6845:
6846: #------------------------------------------------------------------
6847:
6848:
6849:
6850:
6851: #
6852: # Convert an error return code from lcpasswd to a string value.
6853: #
6854: sub lcpasswdstrerror {
6855: my $ErrorCode = shift;
6856: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
6857: return "lcpasswd Unrecognized error return value ".$ErrorCode;
6858: } else {
6859: return $passwderrors[$ErrorCode];
6860: }
6861: }
6862:
6863: # grabs exception and records it to log before exiting
6864: sub catchexception {
6865: my ($error)=@_;
6866: $SIG{'QUIT'}='DEFAULT';
6867: $SIG{__DIE__}='DEFAULT';
6868: &status("Catching exception");
6869: &logthis("<font color='red'>CRITICAL: "
6870: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
6871: ."a crash with this error msg->[$error]</font>");
6872: &logthis('Famous last words: '.$status.' - '.$lastlog);
6873: if ($client) { print $client "error: $error\n"; }
6874: $server->close();
6875: die($error);
6876: }
6877: sub timeout {
6878: &status("Handling Timeout");
6879: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
6880: &catchexception('Timeout');
6881: }
6882: # -------------------------------- Set signal handlers to record abnormal exits
6883:
6884:
6885: $SIG{'QUIT'}=\&catchexception;
6886: $SIG{__DIE__}=\&catchexception;
6887:
6888: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
6889: &status("Read loncapa.conf and loncapa_apache.conf");
6890: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
6891: %perlvar=%{$perlvarref};
6892: undef $perlvarref;
6893:
6894: # ----------------------------- Make sure this process is running from user=www
6895: my $wwwid=getpwnam('www');
6896: if ($wwwid!=$<) {
6897: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6898: my $subj="LON: $currenthostid User ID mismatch";
6899: system("echo 'User ID mismatch. lond must be run as user www.' |\
6900: mailto $emailto -s '$subj' > /dev/null");
6901: exit 1;
6902: }
6903:
6904: # --------------------------------------------- Check if other instance running
6905:
6906: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6907:
6908: if (-e $pidfile) {
6909: my $lfh=IO::File->new("$pidfile");
6910: my $pide=<$lfh>;
6911: chomp($pide);
6912: if (kill 0 => $pide) { die "already running"; }
6913: }
6914:
6915: # ------------------------------------------------------------- Read hosts file
6916:
6917:
6918:
6919: # establish SERVER socket, bind and listen.
6920: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6921: Type => SOCK_STREAM,
6922: Proto => 'tcp',
6923: ReuseAddr => 1,
6924: Listen => 10 )
6925: or die "making socket: $@\n";
6926:
6927: # --------------------------------------------------------- Do global variables
6928:
6929: # global variables
6930:
6931: my %children = (); # keys are current child process IDs
6932:
6933: sub REAPER { # takes care of dead children
6934: $SIG{CHLD} = \&REAPER;
6935: &status("Handling child death");
6936: my $pid;
6937: do {
6938: $pid = waitpid(-1,&WNOHANG());
6939: if (defined($children{$pid})) {
6940: &logthis("Child $pid died");
6941: delete($children{$pid});
6942: } elsif ($pid > 0) {
6943: &logthis("Unknown Child $pid died");
6944: }
6945: } while ( $pid > 0 );
6946: foreach my $child (keys(%children)) {
6947: $pid = waitpid($child,&WNOHANG());
6948: if ($pid > 0) {
6949: &logthis("Child $child - $pid looks like we missed it's death");
6950: delete($children{$pid});
6951: }
6952: }
6953: &status("Finished Handling child death");
6954: }
6955:
6956: sub HUNTSMAN { # signal handler for SIGINT
6957: &status("Killing children (INT)");
6958: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6959: kill 'INT' => keys %children;
6960: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6961: my $execdir=$perlvar{'lonDaemons'};
6962: unlink("$execdir/logs/lond.pid");
6963: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6964: &status("Done killing children");
6965: exit; # clean up with dignity
6966: }
6967:
6968: sub HUPSMAN { # signal handler for SIGHUP
6969: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6970: &status("Killing children for restart (HUP)");
6971: kill 'INT' => keys %children;
6972: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6973: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6974: my $execdir=$perlvar{'lonDaemons'};
6975: unlink("$execdir/logs/lond.pid");
6976: &status("Restarting self (HUP)");
6977: exec("$execdir/lond"); # here we go again
6978: }
6979:
6980: #
6981: # Reload the Apache daemon's state.
6982: # This is done by invoking /home/httpd/perl/apachereload
6983: # a setuid perl script that can be root for us to do this job.
6984: #
6985: sub ReloadApache {
6986: # --------------------------- Handle case of another apachereload process (locking)
6987: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6988: my $execdir = $perlvar{'lonDaemons'};
6989: my $script = $execdir."/apachereload";
6990: system($script);
6991: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6992: }
6993: }
6994:
6995: #
6996: # Called in response to a USR2 signal.
6997: # - Reread hosts.tab
6998: # - All children connected to hosts that were removed from hosts.tab
6999: # are killed via SIGINT
7000: # - All children connected to previously existing hosts are sent SIGUSR1
7001: # - Our internal hosts hash is updated to reflect the new contents of
7002: # hosts.tab causing connections from hosts added to hosts.tab to
7003: # now be honored.
7004: #
7005: sub UpdateHosts {
7006: &status("Reload hosts.tab");
7007: logthis('<font color="blue"> Updating connections </font>');
7008: #
7009: # The %children hash has the set of IP's we currently have children
7010: # on. These need to be matched against records in the hosts.tab
7011: # Any ip's no longer in the table get killed off they correspond to
7012: # either dropped or changed hosts. Note that the re-read of the table
7013: # will take care of new and changed hosts as connections come into being.
7014:
7015: &Apache::lonnet::reset_hosts_info();
7016: my %active;
7017:
7018: foreach my $child (keys(%children)) {
7019: my $childip = $children{$child};
7020: if ($childip ne '127.0.0.1'
7021: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
7022: logthis('<font color="blue"> UpdateHosts killing child '
7023: ." $child for ip $childip </font>");
7024: kill('INT', $child);
7025: } else {
7026: $active{$child} = $childip;
7027: logthis('<font color="green"> keeping child for ip '
7028: ." $childip (pid=$child) </font>");
7029: }
7030: }
7031:
7032: my %oldconf = %secureconf;
7033: my %connchange;
7034: if (lonssl::Read_Connect_Config(\%secureconf,\%crlchecked,\%perlvar) eq 'ok') {
7035: logthis('<font color="blue"> Reloaded SSL connection rules and cleared CRL checking history </font>');
7036: } else {
7037: logthis('<font color="yellow"> Failed to reload SSL connection rules and clear CRL checking history </font>');
7038: }
7039: if ((ref($oldconf{'connfrom'}) eq 'HASH') && (ref($secureconf{'connfrom'}) eq 'HASH')) {
7040: foreach my $type ('dom','intdom','other') {
7041: if ((($oldconf{'connfrom'}{$type} eq 'no') && ($secureconf{'connfrom'}{$type} eq 'req')) ||
7042: (($oldconf{'connfrom'}{$type} eq 'req') && ($secureconf{'connfrom'}{$type} eq 'no'))) {
7043: $connchange{$type} = 1;
7044: }
7045: }
7046: }
7047: if (keys(%connchange)) {
7048: foreach my $child (keys(%active)) {
7049: my $childip = $active{$child};
7050: if ($childip ne '127.0.0.1') {
7051: my $childhostname = gethostbyaddr(Socket::inet_aton($childip),AF_INET);
7052: if ($childhostname ne '') {
7053: my $childlonhost = &Apache::lonnet::get_server_homeID($childhostname);
7054: my ($samedom,$sameinst) = &set_client_info($childlonhost);
7055: if ($samedom) {
7056: if ($connchange{'dom'}) {
7057: logthis('<font color="blue"> UpdateHosts killing child '
7058: ." $child for ip $childip </font>");
7059: kill('INT', $child);
7060: }
7061: } elsif ($sameinst) {
7062: if ($connchange{'intdom'}) {
7063: logthis('<font color="blue"> UpdateHosts killing child '
7064: ." $child for ip $childip </font>");
7065: kill('INT', $child);
7066: }
7067: } else {
7068: if ($connchange{'other'}) {
7069: logthis('<font color="blue"> UpdateHosts killing child '
7070: ." $child for ip $childip </font>");
7071: kill('INT', $child);
7072: }
7073: }
7074: }
7075: }
7076: }
7077: }
7078: ReloadApache;
7079: &status("Finished reloading hosts.tab");
7080: }
7081:
7082: sub checkchildren {
7083: &status("Checking on the children (sending signals)");
7084: &initnewstatus();
7085: &logstatus();
7086: &logthis('Going to check on the children');
7087: my $docdir=$perlvar{'lonDocRoot'};
7088: foreach (sort keys %children) {
7089: #sleep 1;
7090: unless (kill 'USR1' => $_) {
7091: &logthis ('Child '.$_.' is dead');
7092: &logstatus($$.' is dead');
7093: delete($children{$_});
7094: }
7095: }
7096: sleep 5;
7097: $SIG{ALRM} = sub { Debug("timeout");
7098: die "timeout"; };
7099: $SIG{__DIE__} = 'DEFAULT';
7100: &status("Checking on the children (waiting for reports)");
7101: foreach (sort keys %children) {
7102: unless (-e "$docdir/lon-status/londchld/$_.txt") {
7103: eval {
7104: alarm(300);
7105: &logthis('Child '.$_.' did not respond');
7106: kill 9 => $_;
7107: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
7108: #$subj="LON: $currenthostid killed lond process $_";
7109: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
7110: #$execdir=$perlvar{'lonDaemons'};
7111: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
7112: delete($children{$_});
7113: alarm(0);
7114: }
7115: }
7116: }
7117: $SIG{ALRM} = 'DEFAULT';
7118: $SIG{__DIE__} = \&catchexception;
7119: &status("Finished checking children");
7120: &logthis('Finished Checking children');
7121: }
7122:
7123: # --------------------------------------------------------------------- Logging
7124:
7125: sub logthis {
7126: my $message=shift;
7127: my $execdir=$perlvar{'lonDaemons'};
7128: my $fh=IO::File->new(">>$execdir/logs/lond.log");
7129: my $now=time;
7130: my $local=localtime($now);
7131: $lastlog=$local.': '.$message;
7132: print $fh "$local ($$): $message\n";
7133: }
7134:
7135: # ------------------------- Conditional log if $DEBUG true.
7136: sub Debug {
7137: my $message = shift;
7138: if($DEBUG) {
7139: &logthis($message);
7140: }
7141: }
7142:
7143: #
7144: # Sub to do replies to client.. this gives a hook for some
7145: # debug tracing too:
7146: # Parameters:
7147: # fd - File open on client.
7148: # reply - Text to send to client.
7149: # request - Original request from client.
7150: #
7151: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
7152: #this is done automatically ($$reply must not contain any \n in this case).
7153: #If $reply is a string the caller has to ensure this.
7154: sub Reply {
7155: my ($fd, $reply, $request) = @_;
7156: if (ref($reply)) {
7157: print $fd $$reply;
7158: print $fd "\n";
7159: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
7160: } else {
7161: print $fd $reply;
7162: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
7163: }
7164: $Transactions++;
7165: }
7166:
7167:
7168: #
7169: # Sub to report a failure.
7170: # This function:
7171: # - Increments the failure statistic counters.
7172: # - Invokes Reply to send the error message to the client.
7173: # Parameters:
7174: # fd - File descriptor open on the client
7175: # reply - Reply text to emit.
7176: # request - The original request message (used by Reply
7177: # to debug if that's enabled.
7178: # Implicit outputs:
7179: # $Failures- The number of failures is incremented.
7180: # Reply (invoked here) sends a message to the
7181: # client:
7182: #
7183: sub Failure {
7184: my $fd = shift;
7185: my $reply = shift;
7186: my $request = shift;
7187:
7188: $Failures++;
7189: Reply($fd, $reply, $request); # That's simple eh?
7190: }
7191: # ------------------------------------------------------------------ Log status
7192:
7193: sub logstatus {
7194: &status("Doing logging");
7195: my $docdir=$perlvar{'lonDocRoot'};
7196: {
7197: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
7198: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
7199: $fh->close();
7200: }
7201: &status("Finished $$.txt");
7202: {
7203: open(LOG,">>$docdir/lon-status/londstatus.txt");
7204: flock(LOG,LOCK_EX);
7205: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
7206: .$status."\t".$lastlog."\t $keymode\n";
7207: flock(LOG,LOCK_UN);
7208: close(LOG);
7209: }
7210: &status("Finished logging");
7211: }
7212:
7213: sub initnewstatus {
7214: my $docdir=$perlvar{'lonDocRoot'};
7215: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
7216: my $now=time();
7217: my $local=localtime($now);
7218: print $fh "LOND status $local - parent $$\n\n";
7219: opendir(DIR,"$docdir/lon-status/londchld");
7220: while (my $filename=readdir(DIR)) {
7221: unlink("$docdir/lon-status/londchld/$filename");
7222: }
7223: closedir(DIR);
7224: }
7225:
7226: # -------------------------------------------------------------- Status setting
7227:
7228: sub status {
7229: my $what=shift;
7230: my $now=time;
7231: my $local=localtime($now);
7232: $status=$local.': '.$what;
7233: $0='lond: '.$what.' '.$local;
7234: }
7235:
7236: # -------------------------------------------------------------- Talk to lonsql
7237:
7238: sub sql_reply {
7239: my ($cmd)=@_;
7240: my $answer=&sub_sql_reply($cmd);
7241: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
7242: return $answer;
7243: }
7244:
7245: sub sub_sql_reply {
7246: my ($cmd)=@_;
7247: my $unixsock="mysqlsock";
7248: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
7249: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
7250: Type => SOCK_STREAM,
7251: Timeout => 10)
7252: or return "con_lost";
7253: print $sclient "$cmd:$currentdomainid\n";
7254: my $answer=<$sclient>;
7255: chomp($answer);
7256: if (!$answer) { $answer="con_lost"; }
7257: return $answer;
7258: }
7259:
7260: # --------------------------------------- Is this the home server of an author?
7261:
7262: sub ishome {
7263: my $author=shift;
7264: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
7265: my ($udom,$uname)=split(/\//,$author);
7266: my $proname=propath($udom,$uname);
7267: if (-e $proname) {
7268: return 'owner';
7269: } else {
7270: return 'not_owner';
7271: }
7272: }
7273:
7274: # ======================================================= Continue main program
7275: # ---------------------------------------------------- Fork once and dissociate
7276:
7277: my $fpid=fork;
7278: exit if $fpid;
7279: die "Couldn't fork: $!" unless defined ($fpid);
7280:
7281: POSIX::setsid() or die "Can't start new session: $!";
7282:
7283: # ------------------------------------------------------- Write our PID on disk
7284:
7285: my $execdir=$perlvar{'lonDaemons'};
7286: open (PIDSAVE,">$execdir/logs/lond.pid");
7287: print PIDSAVE "$$\n";
7288: close(PIDSAVE);
7289: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
7290: &status('Starting');
7291:
7292:
7293:
7294: # ----------------------------------------------------- Install signal handlers
7295:
7296:
7297: $SIG{CHLD} = \&REAPER;
7298: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7299: $SIG{HUP} = \&HUPSMAN;
7300: $SIG{USR1} = \&checkchildren;
7301: $SIG{USR2} = \&UpdateHosts;
7302:
7303: # Read the host hashes:
7304: &Apache::lonnet::load_hosts_tab();
7305: my %iphost = &Apache::lonnet::get_iphost(1);
7306:
7307: $dist=`$perlvar{'lonDaemons'}/distprobe`;
7308:
7309: my $arch = `uname -i`;
7310: chomp($arch);
7311: if ($arch eq 'unknown') {
7312: $arch = `uname -m`;
7313: chomp($arch);
7314: }
7315:
7316: unless (lonssl::Read_Connect_Config(\%secureconf,\%crlchecked,\%perlvar) eq 'ok') {
7317: &logthis('<font color="blue">No connectionrules table. Will fallback to loncapa.conf</font>');
7318: }
7319:
7320: # --------------------------------------------------------------
7321: # Accept connections. When a connection comes in, it is validated
7322: # and if good, a child process is created to process transactions
7323: # along the connection.
7324:
7325: while (1) {
7326: &status('Starting accept');
7327: $client = $server->accept() or next;
7328: &status('Accepted '.$client.' off to spawn');
7329: make_new_child($client);
7330: &status('Finished spawning');
7331: }
7332:
7333: sub make_new_child {
7334: my $pid;
7335: # my $cipher; # Now global
7336: my $sigset;
7337:
7338: $client = shift;
7339: &status('Starting new child '.$client);
7340: &logthis('<font color="green"> Attempting to start child ('.$client.
7341: ")</font>");
7342: # block signal for fork
7343: $sigset = POSIX::SigSet->new(SIGINT);
7344: sigprocmask(SIG_BLOCK, $sigset)
7345: or die "Can't block SIGINT for fork: $!\n";
7346:
7347: die "fork: $!" unless defined ($pid = fork);
7348:
7349: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
7350: # connection liveness.
7351:
7352: #
7353: # Figure out who we're talking to so we can record the peer in
7354: # the pid hash.
7355: #
7356: my $caller = getpeername($client);
7357: my ($port,$iaddr);
7358: if (defined($caller) && length($caller) > 0) {
7359: ($port,$iaddr)=unpack_sockaddr_in($caller);
7360: } else {
7361: &logthis("Unable to determine who caller was, getpeername returned nothing");
7362: }
7363: if (defined($iaddr)) {
7364: $clientip = inet_ntoa($iaddr);
7365: Debug("Connected with $clientip");
7366: } else {
7367: &logthis("Unable to determine clientip");
7368: $clientip='Unavailable';
7369: }
7370:
7371: if ($pid) {
7372: # Parent records the child's birth and returns.
7373: sigprocmask(SIG_UNBLOCK, $sigset)
7374: or die "Can't unblock SIGINT for fork: $!\n";
7375: $children{$pid} = $clientip;
7376: &status('Started child '.$pid);
7377: close($client);
7378: return;
7379: } else {
7380: # Child can *not* return from this subroutine.
7381: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
7382: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
7383: #don't get intercepted
7384: $SIG{USR1}= \&logstatus;
7385: $SIG{ALRM}= \&timeout;
7386: #
7387: # Block sigpipe as it gets thrownon socket disconnect and we want to
7388: # deal with that as a read faiure instead.
7389: #
7390: my $blockset = POSIX::SigSet->new(SIGPIPE);
7391: sigprocmask(SIG_BLOCK, $blockset);
7392:
7393: $lastlog='Forked ';
7394: $status='Forked';
7395:
7396: # unblock signals
7397: sigprocmask(SIG_UNBLOCK, $sigset)
7398: or die "Can't unblock SIGINT for fork: $!\n";
7399:
7400: # my $tmpsnum=0; # Now global
7401: #---------------------------------------------------- kerberos 5 initialization
7402: &Authen::Krb5::init_context();
7403:
7404: my $no_ets;
7405: if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
7406: if ($1 >= 7) {
7407: $no_ets = 1;
7408: }
7409: } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
7410: if (($1 eq '9.3') || ($1 >= 12.2)) {
7411: $no_ets = 1;
7412: }
7413: } elsif ($dist =~ /^sles(\d+)$/) {
7414: if ($1 > 11) {
7415: $no_ets = 1;
7416: }
7417: } elsif ($dist =~ /^fedora(\d+)$/) {
7418: if ($1 < 7) {
7419: $no_ets = 1;
7420: }
7421: }
7422: unless ($no_ets) {
7423: &Authen::Krb5::init_ets();
7424: }
7425:
7426: &status('Accepted connection');
7427: # =============================================================================
7428: # do something with the connection
7429: # -----------------------------------------------------------------------------
7430: # see if we know client and 'check' for spoof IP by ineffective challenge
7431:
7432: my $outsideip=$clientip;
7433: if ($clientip eq '127.0.0.1') {
7434: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
7435: }
7436: &ReadManagerTable();
7437: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
7438: my $ismanager=($managers{$outsideip} ne undef);
7439: $clientname = "[unknown]";
7440: if($clientrec) { # Establish client type.
7441: $ConnectionType = "client";
7442: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
7443: if($ismanager) {
7444: $ConnectionType = "both";
7445: }
7446: } else {
7447: $ConnectionType = "manager";
7448: $clientname = $managers{$outsideip};
7449: }
7450: my ($clientok,$clientinfoset);
7451:
7452: if ($clientrec || $ismanager) {
7453: &status("Waiting for init from $clientip $clientname");
7454: &logthis('<font color="yellow">INFO: Connection, '.
7455: $clientip.
7456: " ($clientname) connection type = $ConnectionType </font>" );
7457: &status("Connecting $clientip ($clientname))");
7458: my $remotereq=<$client>;
7459: chomp($remotereq);
7460: Debug("Got init: $remotereq");
7461:
7462: if ($remotereq =~ /^init/) {
7463: &sethost("sethost:$perlvar{'lonHostID'}");
7464: #
7465: # If the remote is attempting a local init... give that a try:
7466: #
7467: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
7468: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
7469: # version when initiating the connection. For LON-CAPA 2.8 and older,
7470: # the version is retrieved from the global %loncaparevs in lonnet.pm.
7471: # $clientversion contains path to keyfile if $inittype eq 'local'
7472: # it's overridden below in this case
7473: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
7474:
7475: # If the connection type is ssl, but I didn't get my
7476: # certificate files yet, then I'll drop back to
7477: # insecure (if allowed).
7478:
7479: if ($inittype eq "ssl") {
7480: my $context;
7481: if ($clientsamedom) {
7482: $context = 'dom';
7483: if ($secureconf{'connfrom'}{'dom'} eq 'no') {
7484: $inittype = "";
7485: }
7486: } elsif ($clientsameinst) {
7487: $context = 'intdom';
7488: if ($secureconf{'connfrom'}{'intdom'} eq 'no') {
7489: $inittype = "";
7490: }
7491: } else {
7492: $context = 'other';
7493: if ($secureconf{'connfrom'}{'other'} eq 'no') {
7494: $inittype = "";
7495: }
7496: }
7497: if ($inittype eq '') {
7498: &logthis("<font color=\"blue\"> Domain config set "
7499: ."to no ssl for $clientname (context: $context)"
7500: ." -- trying insecure auth</font>");
7501: }
7502: }
7503:
7504: if($inittype eq "ssl") {
7505: my ($ca, $cert) = lonssl::CertificateFile;
7506: my $kfile = lonssl::KeyFile;
7507: if((!$ca) ||
7508: (!$cert) ||
7509: (!$kfile)) {
7510: $inittype = ""; # This forces insecure attempt.
7511: &logthis("<font color=\"blue\"> Certificates not "
7512: ."installed -- trying insecure auth</font>");
7513: } else { # SSL certificates are in place so
7514: } # Leave the inittype alone.
7515: }
7516:
7517: if($inittype eq "local") {
7518: $clientversion = $perlvar{'lonVersion'};
7519: my $key = LocalConnection($client, $remotereq);
7520: if($key) {
7521: Debug("Got local key $key");
7522: $clientok = 1;
7523: my $cipherkey = pack("H32", $key);
7524: $cipher = new IDEA($cipherkey);
7525: print $client "ok:local\n";
7526: &logthis('<font color="green">'
7527: . "Successful local authentication </font>");
7528: $keymode = "local"
7529: } else {
7530: Debug("Failed to get local key");
7531: $clientok = 0;
7532: shutdown($client, 3);
7533: close $client;
7534: }
7535: } elsif ($inittype eq "ssl") {
7536: my $key = SSLConnection($client,$clientname);
7537: if ($key) {
7538: $clientok = 1;
7539: my $cipherkey = pack("H32", $key);
7540: $cipher = new IDEA($cipherkey);
7541: &logthis('<font color="green">'
7542: ."Successfull ssl authentication with $clientname </font>");
7543: $keymode = "ssl";
7544:
7545: } else {
7546: $clientok = 0;
7547: close $client;
7548: }
7549:
7550: } else {
7551: $clientinfoset = &set_client_info();
7552: my $ok = InsecureConnection($client);
7553: if($ok) {
7554: $clientok = 1;
7555: &logthis('<font color="green">'
7556: ."Successful insecure authentication with $clientname </font>");
7557: print $client "ok\n";
7558: $keymode = "insecure";
7559: } else {
7560: &logthis('<font color="yellow">'
7561: ."Attempted insecure connection disallowed </font>");
7562: close $client;
7563: $clientok = 0;
7564: }
7565: }
7566: } else {
7567: &logthis(
7568: "<font color='blue'>WARNING: "
7569: ."$clientip failed to initialize: >$remotereq< </font>");
7570: &status('No init '.$clientip);
7571: }
7572: } else {
7573: &logthis(
7574: "<font color='blue'>WARNING: Unknown client $clientip</font>");
7575: &status('Hung up on '.$clientip);
7576: }
7577:
7578: if ($clientok) {
7579: # ---------------- New known client connecting, could mean machine online again
7580: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
7581: && $clientip ne '127.0.0.1') {
7582: &Apache::lonnet::reconlonc($clientname);
7583: }
7584: &logthis("<font color='green'>Established connection: $clientname</font>");
7585: &status('Will listen to '.$clientname);
7586: # ------------------------------------------------------------ Process requests
7587: my $keep_going = 1;
7588: my $user_input;
7589: unless ($clientinfoset) {
7590: $clientinfoset = &set_client_info();
7591: }
7592: $clientremoteok = 0;
7593: unless ($clientsameinst) {
7594: $clientremoteok = 1;
7595: my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
7596: %clientprohibited = &get_prohibited($defdom);
7597: if ($clientintdom) {
7598: my $remsessconf = &get_usersession_config($defdom,'remotesession');
7599: if (ref($remsessconf) eq 'HASH') {
7600: if (ref($remsessconf->{'remote'}) eq 'HASH') {
7601: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
7602: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
7603: $clientremoteok = 0;
7604: }
7605: }
7606: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
7607: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
7608: $clientremoteok = 1;
7609: } else {
7610: $clientremoteok = 0;
7611: }
7612: }
7613: }
7614: }
7615: }
7616: }
7617: while(($user_input = get_request) && $keep_going) {
7618: alarm(120);
7619: Debug("Main: Got $user_input\n");
7620: $keep_going = &process_request($user_input);
7621: alarm(0);
7622: &status('Listening to '.$clientname." ($keymode)");
7623: }
7624:
7625: # --------------------------------------------- client unknown or fishy, refuse
7626: } else {
7627: print $client "refused\n";
7628: $client->close();
7629: &logthis("<font color='blue'>WARNING: "
7630: ."Rejected client $clientip, closing connection</font>");
7631: }
7632: }
7633:
7634: # =============================================================================
7635:
7636: &logthis("<font color='red'>CRITICAL: "
7637: ."Disconnect from $clientip ($clientname)</font>");
7638:
7639:
7640: # this exit is VERY important, otherwise the child will become
7641: # a producer of more and more children, forking yourself into
7642: # process death.
7643: exit;
7644:
7645: }
7646:
7647: #
7648: # Used to determine if a particular client is from the same domain
7649: # as the current server, or from the same internet domain.
7650: #
7651: # Optional input -- the client to check for domain and internet domain.
7652: # If not specified, defaults to the package variable: $clientname
7653: #
7654: # If called in array context will not set package variables, but will
7655: # instead return an array of two values - (a) true if client is in the
7656: # same domain as the server, and (b) true if client is in the same internet
7657: # domain.
7658: #
7659: # If called in scalar context, sets package variables for current client:
7660: #
7661: # $clienthomedom - LonCAPA domain of homeID for client.
7662: # $clientsamedom - LonCAPA domain same for this host and client.
7663: # $clientintdom - LonCAPA "internet domain" for client.
7664: # $clientsameinst - LonCAPA "internet domain" same for this host & client.
7665: #
7666: # returns 1 to indicate package variables have been set for current client.
7667: #
7668:
7669: sub set_client_info {
7670: my ($lonhost) = @_;
7671: $lonhost ||= $clientname;
7672: my $clienthost = &Apache::lonnet::hostname($lonhost);
7673: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
7674: my $homedom = &Apache::lonnet::host_domain($clientserverhomeID);
7675: my $samedom = 0;
7676: if ($perlvar{'lonDefDom'} eq $homedom) {
7677: $samedom = 1;
7678: }
7679: my $intdom = &Apache::lonnet::internet_dom($clientserverhomeID);
7680: my $sameinst = 0;
7681: if ($intdom ne '') {
7682: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
7683: if (ref($internet_names) eq 'ARRAY') {
7684: if (grep(/^\Q$intdom\E$/,@{$internet_names})) {
7685: $sameinst = 1;
7686: }
7687: }
7688: }
7689: if (wantarray) {
7690: return ($samedom,$sameinst);
7691: } else {
7692: $clienthomedom = $homedom;
7693: $clientsamedom = $samedom;
7694: $clientintdom = $intdom;
7695: $clientsameinst = $sameinst;
7696: return 1;
7697: }
7698: }
7699:
7700: #
7701: # Determine if a user is an author for the indicated domain.
7702: #
7703: # Parameters:
7704: # domain - domain to check in .
7705: # user - Name of user to check.
7706: #
7707: # Return:
7708: # 1 - User is an author for domain.
7709: # 0 - User is not an author for domain.
7710: sub is_author {
7711: my ($domain, $user) = @_;
7712:
7713: &Debug("is_author: $user @ $domain");
7714:
7715: my $hashref = &tie_user_hash($domain, $user, "roles",
7716: &GDBM_READER());
7717:
7718: # Author role should show up as a key /domain/_au
7719:
7720: my $value;
7721: if ($hashref) {
7722:
7723: my $key = "/$domain/_au";
7724: if (defined($hashref)) {
7725: $value = $hashref->{$key};
7726: if(!untie_user_hash($hashref)) {
7727: return 'error: ' . ($!+0)." untie (GDBM) Failed";
7728: }
7729: }
7730:
7731: if(defined($value)) {
7732: &Debug("$user @ $domain is an author");
7733: }
7734: } else {
7735: return 'error: '.($!+0)." tie (GDBM) Failed";
7736: }
7737:
7738: return defined($value);
7739: }
7740: #
7741: # Checks to see if the input roleput request was to set
7742: # an author role. If so, creates construction space
7743: # Parameters:
7744: # request - The request sent to the rolesput subchunk.
7745: # We're looking for /domain/_au
7746: # domain - The domain in which the user is having roles doctored.
7747: # user - Name of the user for which the role is being put.
7748: # authtype - The authentication type associated with the user.
7749: #
7750: sub manage_permissions {
7751: my ($request, $domain, $user, $authtype) = @_;
7752: # See if the request is of the form /$domain/_au
7753: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
7754: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
7755: unless (-e $path) {
7756: mkdir($path);
7757: }
7758: unless (-e $path.'/'.$user) {
7759: mkdir($path.'/'.$user);
7760: }
7761: }
7762: }
7763:
7764:
7765: #
7766: # Return the full path of a user password file, whether it exists or not.
7767: # Parameters:
7768: # domain - Domain in which the password file lives.
7769: # user - name of the user.
7770: # Returns:
7771: # Full passwd path:
7772: #
7773: sub password_path {
7774: my ($domain, $user) = @_;
7775: return &propath($domain, $user).'/passwd';
7776: }
7777:
7778: # Password Filename
7779: # Returns the path to a passwd file given domain and user... only if
7780: # it exists.
7781: # Parameters:
7782: # domain - Domain in which to search.
7783: # user - username.
7784: # Returns:
7785: # - If the password file exists returns its path.
7786: # - If the password file does not exist, returns undefined.
7787: #
7788: sub password_filename {
7789: my ($domain, $user) = @_;
7790:
7791: Debug ("PasswordFilename called: dom = $domain user = $user");
7792:
7793: my $path = &password_path($domain, $user);
7794: Debug("PasswordFilename got path: $path");
7795: if(-e $path) {
7796: return $path;
7797: } else {
7798: return undef;
7799: }
7800: }
7801:
7802: #
7803: # Rewrite the contents of the user's passwd file.
7804: # Parameters:
7805: # domain - domain of the user.
7806: # name - User's name.
7807: # contents - New contents of the file.
7808: # saveold - (optional). If true save old file in a passwd.bak file.
7809: # Returns:
7810: # 0 - Failed.
7811: # 1 - Success.
7812: #
7813: sub rewrite_password_file {
7814: my ($domain, $user, $contents, $saveold) = @_;
7815:
7816: my $file = &password_filename($domain, $user);
7817: if (defined $file) {
7818: if ($saveold) {
7819: my $bakfile = $file.'.bak';
7820: if (CopyFile($file,$bakfile)) {
7821: chmod(0400,$bakfile);
7822: &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain");
7823: } else {
7824: &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain");
7825: }
7826: }
7827: my $pf = IO::File->new(">$file");
7828: if($pf) {
7829: print $pf "$contents\n";
7830: return 1;
7831: } else {
7832: return 0;
7833: }
7834: } else {
7835: return 0;
7836: }
7837:
7838: }
7839:
7840: #
7841: # get_auth_type - Determines the authorization type of a user in a domain.
7842:
7843: # Returns the authorization type or nouser if there is no such user.
7844: #
7845: sub get_auth_type {
7846: my ($domain, $user) = @_;
7847:
7848: Debug("get_auth_type( $domain, $user ) \n");
7849: my $proname = &propath($domain, $user);
7850: my $passwdfile = "$proname/passwd";
7851: if( -e $passwdfile ) {
7852: my $pf = IO::File->new($passwdfile);
7853: my $realpassword = <$pf>;
7854: chomp($realpassword);
7855: Debug("Password info = $realpassword\n");
7856: my ($authtype, $contentpwd) = split(/:/, $realpassword);
7857: Debug("Authtype = $authtype, content = $contentpwd\n");
7858: return "$authtype:$contentpwd";
7859: } else {
7860: Debug("Returning nouser");
7861: return "nouser";
7862: }
7863: }
7864:
7865: #
7866: # Validate a user given their domain, name and password. This utility
7867: # function is used by both AuthenticateHandler and ChangePasswordHandler
7868: # to validate the login credentials of a user.
7869: # Parameters:
7870: # $domain - The domain being logged into (this is required due to
7871: # the capability for multihomed systems.
7872: # $user - The name of the user being validated.
7873: # $password - The user's propoposed password.
7874: #
7875: # Returns:
7876: # 1 - The domain,user,pasword triplet corresponds to a valid
7877: # user.
7878: # 0 - The domain,user,password triplet is not a valid user.
7879: #
7880: sub validate_user {
7881: my ($domain, $user, $password, $checkdefauth) = @_;
7882:
7883: # Why negative ~pi you may well ask? Well this function is about
7884: # authentication, and therefore very important to get right.
7885: # I've initialized the flag that determines whether or not I've
7886: # validated correctly to a value it's not supposed to get.
7887: # At the end of this function. I'll ensure that it's not still that
7888: # value so we don't just wind up returning some accidental value
7889: # as a result of executing an unforseen code path that
7890: # did not set $validated. At the end of valid execution paths,
7891: # validated shoule be 1 for success or 0 for failuer.
7892:
7893: my $validated = -3.14159;
7894:
7895: # How we authenticate is determined by the type of authentication
7896: # the user has been assigned. If the authentication type is
7897: # "nouser", the user does not exist so we will return 0.
7898:
7899: my $contents = &get_auth_type($domain, $user);
7900: my ($howpwd, $contentpwd) = split(/:/, $contents);
7901:
7902: my $null = pack("C",0); # Used by kerberos auth types.
7903:
7904: if ($howpwd eq 'nouser') {
7905: if ($checkdefauth) {
7906: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7907: if ($domdefaults{'auth_def'} eq 'localauth') {
7908: $howpwd = $domdefaults{'auth_def'};
7909: $contentpwd = $domdefaults{'auth_arg_def'};
7910: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
7911: ($domdefaults{'auth_def'} eq 'krb5')) &&
7912: ($domdefaults{'auth_arg_def'} ne '')) {
7913: $howpwd = $domdefaults{'auth_def'};
7914: $contentpwd = $domdefaults{'auth_arg_def'};
7915: }
7916: }
7917: }
7918: if ($howpwd ne 'nouser') {
7919: if($howpwd eq "internal") { # Encrypted is in local password file.
7920: if (length($contentpwd) == 13) {
7921: $validated = (crypt($password,$contentpwd) eq $contentpwd);
7922: if ($validated) {
7923: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7924: if ($domdefaults{'intauth_switch'}) {
7925: my $ncpass = &hash_passwd($domain,$password);
7926: my $saveold;
7927: if ($domdefaults{'intauth_switch'} == 2) {
7928: $saveold = 1;
7929: }
7930: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) {
7931: &update_passwd_history($user,$domain,$howpwd,'conversion');
7932: &logthis("Validated password hashed with bcrypt for $user:$domain");
7933: }
7934: }
7935: }
7936: } else {
7937: $validated = &check_internal_passwd($password,$contentpwd,$domain,$user);
7938: }
7939: }
7940: elsif ($howpwd eq "unix") { # User is a normal unix user.
7941: $contentpwd = (getpwnam($user))[1];
7942: if($contentpwd) {
7943: if($contentpwd eq 'x') { # Shadow password file...
7944: my $pwauth_path = "/usr/local/sbin/pwauth";
7945: open PWAUTH, "|$pwauth_path" or
7946: die "Cannot invoke authentication";
7947: print PWAUTH "$user\n$password\n";
7948: close PWAUTH;
7949: $validated = ! $?;
7950:
7951: } else { # Passwords in /etc/passwd.
7952: $validated = (crypt($password,
7953: $contentpwd) eq $contentpwd);
7954: }
7955: } else {
7956: $validated = 0;
7957: }
7958: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
7959: my $checkwithkrb5 = 0;
7960: if ($dist =~/^fedora(\d+)$/) {
7961: if ($1 > 11) {
7962: $checkwithkrb5 = 1;
7963: }
7964: } elsif ($dist =~ /^suse([\d.]+)$/) {
7965: if ($1 > 11.1) {
7966: $checkwithkrb5 = 1;
7967: }
7968: }
7969: if ($checkwithkrb5) {
7970: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7971: } else {
7972: $validated = &krb4_authen($password,$null,$user,$contentpwd);
7973: }
7974: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
7975: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7976: } elsif ($howpwd eq "localauth") {
7977: # Authenticate via installation specific authentcation method:
7978: $validated = &localauth::localauth($user,
7979: $password,
7980: $contentpwd,
7981: $domain);
7982: if ($validated < 0) {
7983: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
7984: $validated = 0;
7985: }
7986: } else { # Unrecognized auth is also bad.
7987: $validated = 0;
7988: }
7989: } else {
7990: $validated = 0;
7991: }
7992: #
7993: # $validated has the correct stat of the authentication:
7994: #
7995:
7996: unless ($validated != -3.14159) {
7997: # I >really really< want to know if this happens.
7998: # since it indicates that user authentication is badly
7999: # broken in some code path.
8000: #
8001: die "ValidateUser - failed to set the value of validated $domain, $user $password";
8002: }
8003: return $validated;
8004: }
8005:
8006: sub check_internal_passwd {
8007: my ($plainpass,$stored,$domain,$user) = @_;
8008: my (undef,$method,@rest) = split(/!/,$stored);
8009: if ($method eq 'bcrypt') {
8010: my $result = &hash_passwd($domain,$plainpass,@rest);
8011: if ($result ne $stored) {
8012: return 0;
8013: }
8014: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
8015: if ($domdefaults{'intauth_check'}) {
8016: # Upgrade to a larger number of rounds if necessary
8017: my $defaultcost = $domdefaults{'intauth_cost'};
8018: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
8019: $defaultcost = 10;
8020: }
8021: if (int($rest[0])<int($defaultcost)) {
8022: if ($domdefaults{'intauth_check'} == 1) {
8023: my $ncpass = &hash_passwd($domain,$plainpass);
8024: if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
8025: &update_passwd_history($user,$domain,'internal','update cost');
8026: &logthis("Validated password hashed with bcrypt for $user:$domain");
8027: }
8028: return 1;
8029: } elsif ($domdefaults{'intauth_check'} == 2) {
8030: return 0;
8031: }
8032: }
8033: } else {
8034: return 1;
8035: }
8036: }
8037: return 0;
8038: }
8039:
8040: sub get_last_authchg {
8041: my ($domain,$user) = @_;
8042: my $lastmod;
8043: my $logname = &propath($domain,$user).'/passwd.log';
8044: if (-e "$logname") {
8045: $lastmod = (stat("$logname"))[9];
8046: }
8047: return $lastmod;
8048: }
8049:
8050: sub krb4_authen {
8051: my ($password,$null,$user,$contentpwd) = @_;
8052: my $validated = 0;
8053: if (!($password =~ /$null/) ) { # Null password not allowed.
8054: eval {
8055: require Authen::Krb4;
8056: };
8057: if (!$@) {
8058: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
8059: "",
8060: $contentpwd,,
8061: 'krbtgt',
8062: $contentpwd,
8063: 1,
8064: $password);
8065: if(!$k4error) {
8066: $validated = 1;
8067: } else {
8068: $validated = 0;
8069: &logthis('krb4: '.$user.', '.$contentpwd.', '.
8070: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
8071: }
8072: } else {
8073: $validated = krb5_authen($password,$null,$user,$contentpwd);
8074: }
8075: }
8076: return $validated;
8077: }
8078:
8079: sub krb5_authen {
8080: my ($password,$null,$user,$contentpwd) = @_;
8081: my $validated = 0;
8082: if(!($password =~ /$null/)) { # Null password not allowed.
8083: my $krbclient = &Authen::Krb5::parse_name($user.'@'
8084: .$contentpwd);
8085: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
8086: my $krbserver = &Authen::Krb5::parse_name($krbservice);
8087: my $credentials= &Authen::Krb5::cc_default();
8088: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
8089: .$contentpwd));
8090: my $krbreturn;
8091: if (exists(&Authen::Krb5::get_init_creds_password)) {
8092: $krbreturn =
8093: &Authen::Krb5::get_init_creds_password($krbclient,$password,
8094: $krbservice);
8095: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
8096: } else {
8097: $krbreturn =
8098: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
8099: $password,$credentials);
8100: $validated = ($krbreturn == 1);
8101: }
8102: if (!$validated) {
8103: &logthis('krb5: '.$user.', '.$contentpwd.', '.
8104: &Authen::Krb5::error());
8105: }
8106: }
8107: return $validated;
8108: }
8109:
8110: sub addline {
8111: my ($fname,$hostid,$ip,$newline)=@_;
8112: my $contents;
8113: my $found=0;
8114: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
8115: my $sh;
8116: if ($sh=IO::File->new("$fname.subscription")) {
8117: while (my $subline=<$sh>) {
8118: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
8119: }
8120: $sh->close();
8121: }
8122: $sh=IO::File->new(">$fname.subscription");
8123: if ($contents) { print $sh $contents; }
8124: if ($newline) { print $sh $newline; }
8125: $sh->close();
8126: return $found;
8127: }
8128:
8129: sub get_chat {
8130: my ($cdom,$cname,$udom,$uname,$group)=@_;
8131:
8132: my @entries=();
8133: my $namespace = 'nohist_chatroom';
8134: my $namespace_inroom = 'nohist_inchatroom';
8135: if ($group ne '') {
8136: $namespace .= '_'.$group;
8137: $namespace_inroom .= '_'.$group;
8138: }
8139: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
8140: &GDBM_READER());
8141: if ($hashref) {
8142: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
8143: &untie_user_hash($hashref);
8144: }
8145: my @participants=();
8146: my $cutoff=time-60;
8147: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
8148: &GDBM_WRCREAT());
8149: if ($hashref) {
8150: $hashref->{$uname.':'.$udom}=time;
8151: foreach my $user (sort(keys(%$hashref))) {
8152: if ($hashref->{$user}>$cutoff) {
8153: push(@participants, 'active_participant:'.$user);
8154: }
8155: }
8156: &untie_user_hash($hashref);
8157: }
8158: return (@participants,@entries);
8159: }
8160:
8161: sub chat_add {
8162: my ($cdom,$cname,$newchat,$group)=@_;
8163: my @entries=();
8164: my $time=time;
8165: my $namespace = 'nohist_chatroom';
8166: my $logfile = 'chatroom.log';
8167: if ($group ne '') {
8168: $namespace .= '_'.$group;
8169: $logfile = 'chatroom_'.$group.'.log';
8170: }
8171: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
8172: &GDBM_WRCREAT());
8173: if ($hashref) {
8174: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
8175: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
8176: my ($thentime,$idnum)=split(/\_/,$lastid);
8177: my $newid=$time.'_000000';
8178: if ($thentime==$time) {
8179: $idnum=~s/^0+//;
8180: $idnum++;
8181: $idnum=substr('000000'.$idnum,-6,6);
8182: $newid=$time.'_'.$idnum;
8183: }
8184: $hashref->{$newid}=$newchat;
8185: my $expired=$time-3600;
8186: foreach my $comment (keys(%$hashref)) {
8187: my ($thistime) = ($comment=~/(\d+)\_/);
8188: if ($thistime<$expired) {
8189: delete $hashref->{$comment};
8190: }
8191: }
8192: {
8193: my $proname=&propath($cdom,$cname);
8194: if (open(CHATLOG,">>$proname/$logfile")) {
8195: print CHATLOG ("$time:".&unescape($newchat)."\n");
8196: }
8197: close(CHATLOG);
8198: }
8199: &untie_user_hash($hashref);
8200: }
8201: }
8202:
8203: sub unsub {
8204: my ($fname,$clientip)=@_;
8205: my $result;
8206: my $unsubs = 0; # Number of successful unsubscribes:
8207:
8208:
8209: # An old way subscriptions were handled was to have a
8210: # subscription marker file:
8211:
8212: Debug("Attempting unlink of $fname.$clientname");
8213: if (unlink("$fname.$clientname")) {
8214: $unsubs++; # Successful unsub via marker file.
8215: }
8216:
8217: # The more modern way to do it is to have a subscription list
8218: # file:
8219:
8220: if (-e "$fname.subscription") {
8221: my $found=&addline($fname,$clientname,$clientip,'');
8222: if ($found) {
8223: $unsubs++;
8224: }
8225: }
8226:
8227: # If either or both of these mechanisms succeeded in unsubscribing a
8228: # resource we can return ok:
8229:
8230: if($unsubs) {
8231: $result = "ok\n";
8232: } else {
8233: $result = "not_subscribed\n";
8234: }
8235:
8236: return $result;
8237: }
8238:
8239: sub currentversion {
8240: my $fname=shift;
8241: my $version=-1;
8242: my $ulsdir='';
8243: if ($fname=~/^(.+)\/[^\/]+$/) {
8244: $ulsdir=$1;
8245: }
8246: my ($fnamere1,$fnamere2);
8247: # remove version if already specified
8248: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
8249: # get the bits that go before and after the version number
8250: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
8251: $fnamere1=$1;
8252: $fnamere2='.'.$2;
8253: }
8254: if (-e $fname) { $version=1; }
8255: if (-e $ulsdir) {
8256: if(-d $ulsdir) {
8257: if (opendir(LSDIR,$ulsdir)) {
8258: my $ulsfn;
8259: while ($ulsfn=readdir(LSDIR)) {
8260: # see if this is a regular file (ignore links produced earlier)
8261: my $thisfile=$ulsdir.'/'.$ulsfn;
8262: unless (-l $thisfile) {
8263: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
8264: if ($1>$version) { $version=$1; }
8265: }
8266: }
8267: }
8268: closedir(LSDIR);
8269: $version++;
8270: }
8271: }
8272: }
8273: return $version;
8274: }
8275:
8276: sub thisversion {
8277: my $fname=shift;
8278: my $version=-1;
8279: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
8280: $version=$1;
8281: }
8282: return $version;
8283: }
8284:
8285: sub subscribe {
8286: my ($userinput,$clientip)=@_;
8287: my $result;
8288: my ($cmd,$fname)=split(/:/,$userinput,2);
8289: my $ownership=&ishome($fname);
8290: if ($ownership eq 'owner') {
8291: # explitly asking for the current version?
8292: unless (-e $fname) {
8293: my $currentversion=¤tversion($fname);
8294: if (&thisversion($fname)==$currentversion) {
8295: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
8296: my $root=$1;
8297: my $extension=$2;
8298: symlink($root.'.'.$extension,
8299: $root.'.'.$currentversion.'.'.$extension);
8300: unless ($extension=~/\.meta$/) {
8301: symlink($root.'.'.$extension.'.meta',
8302: $root.'.'.$currentversion.'.'.$extension.'.meta');
8303: }
8304: }
8305: }
8306: }
8307: if (-e $fname) {
8308: if (-d $fname) {
8309: $result="directory\n";
8310: } else {
8311: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
8312: my $now=time;
8313: my $found=&addline($fname,$clientname,$clientip,
8314: "$clientname:$clientip:$now\n");
8315: if ($found) { $result="$fname\n"; }
8316: # if they were subscribed to only meta data, delete that
8317: # subscription, when you subscribe to a file you also get
8318: # the metadata
8319: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
8320: $fname=~s/\/home\/httpd\/html\/res/raw/;
8321: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
8322: $protocol = 'http' if ($protocol ne 'https');
8323: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
8324: $result="$fname\n";
8325: }
8326: } else {
8327: $result="not_found\n";
8328: }
8329: } else {
8330: $result="rejected\n";
8331: }
8332: return $result;
8333: }
8334: # Change the passwd of a unix user. The caller must have
8335: # first verified that the user is a loncapa user.
8336: #
8337: # Parameters:
8338: # user - Unix user name to change.
8339: # pass - New password for the user.
8340: # Returns:
8341: # ok - if success
8342: # other - Some meaningfule error message string.
8343: # NOTE:
8344: # invokes a setuid script to change the passwd.
8345: sub change_unix_password {
8346: my ($user, $pass) = @_;
8347:
8348: &Debug("change_unix_password");
8349: my $execdir=$perlvar{'lonDaemons'};
8350: &Debug("Opening lcpasswd pipeline");
8351: my $pf = IO::File->new("|$execdir/lcpasswd > "
8352: ."$perlvar{'lonDaemons'}"
8353: ."/logs/lcpasswd.log");
8354: print $pf "$user\n$pass\n$pass\n";
8355: close $pf;
8356: my $err = $?;
8357: return ($err < @passwderrors) ? $passwderrors[$err] :
8358: "pwchange_falure - unknown error";
8359:
8360:
8361: }
8362:
8363:
8364: sub make_passwd_file {
8365: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
8366: my $result="ok";
8367: if ($umode eq 'krb4' or $umode eq 'krb5') {
8368: {
8369: my $pf = IO::File->new(">$passfilename");
8370: if ($pf) {
8371: print $pf "$umode:$npass\n";
8372: &update_passwd_history($uname,$udom,$umode,$action);
8373: } else {
8374: $result = "pass_file_failed_error";
8375: }
8376: }
8377: } elsif ($umode eq 'internal') {
8378: my $ncpass = &hash_passwd($udom,$npass);
8379: {
8380: &Debug("Creating internal auth");
8381: my $pf = IO::File->new(">$passfilename");
8382: if($pf) {
8383: print $pf "internal:$ncpass\n";
8384: &update_passwd_history($uname,$udom,$umode,$action);
8385: } else {
8386: $result = "pass_file_failed_error";
8387: }
8388: }
8389: } elsif ($umode eq 'localauth') {
8390: {
8391: my $pf = IO::File->new(">$passfilename");
8392: if($pf) {
8393: print $pf "localauth:$npass\n";
8394: &update_passwd_history($uname,$udom,$umode,$action);
8395: } else {
8396: $result = "pass_file_failed_error";
8397: }
8398: }
8399: } elsif ($umode eq 'unix') {
8400: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
8401: $result="no_new_unix_accounts";
8402: } elsif ($umode eq 'none') {
8403: {
8404: my $pf = IO::File->new("> $passfilename");
8405: if($pf) {
8406: print $pf "none:\n";
8407: } else {
8408: $result = "pass_file_failed_error";
8409: }
8410: }
8411: } elsif ($umode eq 'lti') {
8412: my $pf = IO::File->new(">$passfilename");
8413: if($pf) {
8414: print $pf "lti:\n";
8415: &update_passwd_history($uname,$udom,$umode,$action);
8416: } else {
8417: $result = "pass_file_failed_error";
8418: }
8419: } else {
8420: $result="auth_mode_error";
8421: }
8422: return $result;
8423: }
8424:
8425: sub convert_photo {
8426: my ($start,$dest)=@_;
8427: system("convert $start $dest");
8428: }
8429:
8430: sub sethost {
8431: my ($remotereq) = @_;
8432: my (undef,$hostid)=split(/:/,$remotereq);
8433: # ignore sethost if we are already correct
8434: if ($hostid eq $currenthostid) {
8435: return 'ok';
8436: }
8437:
8438: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
8439: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
8440: eq &Apache::lonnet::get_host_ip($hostid)) {
8441: $currenthostid =$hostid;
8442: $currentdomainid=&Apache::lonnet::host_domain($hostid);
8443: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
8444: } else {
8445: &logthis("Requested host id $hostid not an alias of ".
8446: $perlvar{'lonHostID'}." refusing connection");
8447: return 'unable_to_set';
8448: }
8449: return 'ok';
8450: }
8451:
8452: sub version {
8453: my ($userinput)=@_;
8454: $remoteVERSION=(split(/:/,$userinput))[1];
8455: return "version:$VERSION";
8456: }
8457:
8458: sub get_usersession_config {
8459: my ($dom,$name) = @_;
8460: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8461: if (defined($cached)) {
8462: return $usersessionconf;
8463: } else {
8464: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
8465: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
8466: return $domconfig{'usersessions'};
8467: }
8468: return;
8469: }
8470:
8471: sub get_usersearch_config {
8472: my ($dom,$name) = @_;
8473: my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8474: if (defined($cached)) {
8475: return $usersearchconf;
8476: } else {
8477: my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
8478: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600);
8479: return $domconfig{'directorysrch'};
8480: }
8481: return;
8482: }
8483:
8484: sub get_prohibited {
8485: my ($dom) = @_;
8486: my $name = 'trust';
8487: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8488: unless (defined($cached)) {
8489: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
8490: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
8491: $trustconfig = $domconfig{'trust'};
8492: }
8493: my %prohibited;
8494: if (ref($trustconfig)) {
8495: foreach my $prefix (keys(%{$trustconfig})) {
8496: if (ref($trustconfig->{$prefix}) eq 'HASH') {
8497: my $reject;
8498: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
8499: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
8500: $reject = 1;
8501: }
8502: }
8503: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
8504: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
8505: $reject = 0;
8506: } else {
8507: $reject = 1;
8508: }
8509: }
8510: if ($reject) {
8511: $prohibited{$prefix} = 1;
8512: }
8513: }
8514: }
8515: }
8516: return %prohibited;
8517: }
8518:
8519: sub distro_and_arch {
8520: return $dist.':'.$arch;
8521: }
8522:
8523: # ----------------------------------- POD (plain old documentation, CPAN style)
8524:
8525: =head1 NAME
8526:
8527: lond - "LON Daemon" Server (port "LOND" 5663)
8528:
8529: =head1 SYNOPSIS
8530:
8531: Usage: B<lond>
8532:
8533: Should only be run as user=www. This is a command-line script which
8534: is invoked by B<loncron>. There is no expectation that a typical user
8535: will manually start B<lond> from the command-line. (In other words,
8536: DO NOT START B<lond> YOURSELF.)
8537:
8538: =head1 DESCRIPTION
8539:
8540: There are two characteristics associated with the running of B<lond>,
8541: PROCESS MANAGEMENT (starting, stopping, handling child processes)
8542: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
8543: subscriptions, etc). These are described in two large
8544: sections below.
8545:
8546: B<PROCESS MANAGEMENT>
8547:
8548: Preforker - server who forks first. Runs as a daemon. HUPs.
8549: Uses IDEA encryption
8550:
8551: B<lond> forks off children processes that correspond to the other servers
8552: in the network. Management of these processes can be done at the
8553: parent process level or the child process level.
8554:
8555: B<logs/lond.log> is the location of log messages.
8556:
8557: The process management is now explained in terms of linux shell commands,
8558: subroutines internal to this code, and signal assignments:
8559:
8560: =over 4
8561:
8562: =item *
8563:
8564: PID is stored in B<logs/lond.pid>
8565:
8566: This is the process id number of the parent B<lond> process.
8567:
8568: =item *
8569:
8570: SIGTERM and SIGINT
8571:
8572: Parent signal assignment:
8573: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
8574:
8575: Child signal assignment:
8576: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
8577: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
8578: to restart a new child.)
8579:
8580: Command-line invocations:
8581: B<kill> B<-s> SIGTERM I<PID>
8582: B<kill> B<-s> SIGINT I<PID>
8583:
8584: Subroutine B<HUNTSMAN>:
8585: This is only invoked for the B<lond> parent I<PID>.
8586: This kills all the children, and then the parent.
8587: The B<lonc.pid> file is cleared.
8588:
8589: =item *
8590:
8591: SIGHUP
8592:
8593: Current bug:
8594: This signal can only be processed the first time
8595: on the parent process. Subsequent SIGHUP signals
8596: have no effect.
8597:
8598: Parent signal assignment:
8599: $SIG{HUP} = \&HUPSMAN;
8600:
8601: Child signal assignment:
8602: none (nothing happens)
8603:
8604: Command-line invocations:
8605: B<kill> B<-s> SIGHUP I<PID>
8606:
8607: Subroutine B<HUPSMAN>:
8608: This is only invoked for the B<lond> parent I<PID>,
8609: This kills all the children, and then the parent.
8610: The B<lond.pid> file is cleared.
8611:
8612: =item *
8613:
8614: SIGUSR1
8615:
8616: Parent signal assignment:
8617: $SIG{USR1} = \&USRMAN;
8618:
8619: Child signal assignment:
8620: $SIG{USR1}= \&logstatus;
8621:
8622: Command-line invocations:
8623: B<kill> B<-s> SIGUSR1 I<PID>
8624:
8625: Subroutine B<USRMAN>:
8626: When invoked for the B<lond> parent I<PID>,
8627: SIGUSR1 is sent to all the children, and the status of
8628: each connection is logged.
8629:
8630: =item *
8631:
8632: SIGUSR2
8633:
8634: Parent Signal assignment:
8635: $SIG{USR2} = \&UpdateHosts
8636:
8637: Child signal assignment:
8638: NONE
8639:
8640:
8641: =item *
8642:
8643: SIGCHLD
8644:
8645: Parent signal assignment:
8646: $SIG{CHLD} = \&REAPER;
8647:
8648: Child signal assignment:
8649: none
8650:
8651: Command-line invocations:
8652: B<kill> B<-s> SIGCHLD I<PID>
8653:
8654: Subroutine B<REAPER>:
8655: This is only invoked for the B<lond> parent I<PID>.
8656: Information pertaining to the child is removed.
8657: The socket port is cleaned up.
8658:
8659: =back
8660:
8661: B<SERVER-SIDE ACTIVITIES>
8662:
8663: Server-side information can be accepted in an encrypted or non-encrypted
8664: method.
8665:
8666: =over 4
8667:
8668: =item ping
8669:
8670: Query a client in the hosts.tab table; "Are you there?"
8671:
8672: =item pong
8673:
8674: Respond to a ping query.
8675:
8676: =item ekey
8677:
8678: Read in encrypted key, make cipher. Respond with a buildkey.
8679:
8680: =item load
8681:
8682: Respond with CPU load based on a computation upon /proc/loadavg.
8683:
8684: =item currentauth
8685:
8686: Reply with current authentication information (only over an
8687: encrypted channel).
8688:
8689: =item auth
8690:
8691: Only over an encrypted channel, reply as to whether a user's
8692: authentication information can be validated.
8693:
8694: =item passwd
8695:
8696: Allow for a password to be set.
8697:
8698: =item makeuser
8699:
8700: Make a user.
8701:
8702: =item changeuserauth
8703:
8704: Allow for authentication mechanism and password to be changed.
8705:
8706: =item home
8707:
8708: Respond to a question "are you the home for a given user?"
8709:
8710: =item update
8711:
8712: Update contents of a subscribed resource.
8713:
8714: =item unsubscribe
8715:
8716: The server is unsubscribing from a resource.
8717:
8718: =item subscribe
8719:
8720: The server is subscribing to a resource.
8721:
8722: =item log
8723:
8724: Place in B<logs/lond.log>
8725:
8726: =item put
8727:
8728: stores hash in namespace
8729:
8730: =item rolesput
8731:
8732: put a role into a user's environment
8733:
8734: =item get
8735:
8736: returns hash with keys from array
8737: reference filled in from namespace
8738:
8739: =item eget
8740:
8741: returns hash with keys from array
8742: reference filled in from namesp (encrypts the return communication)
8743:
8744: =item rolesget
8745:
8746: get a role from a user's environment
8747:
8748: =item del
8749:
8750: deletes keys out of array from namespace
8751:
8752: =item keys
8753:
8754: returns namespace keys
8755:
8756: =item dump
8757:
8758: dumps the complete (or key matching regexp) namespace into a hash
8759:
8760: =item store
8761:
8762: stores hash permanently
8763: for this url; hashref needs to be given and should be a \%hashname; the
8764: remaining args aren't required and if they aren't passed or are '' they will
8765: be derived from the ENV
8766:
8767: =item restore
8768:
8769: returns a hash for a given url
8770:
8771: =item querysend
8772:
8773: Tells client about the lonsql process that has been launched in response
8774: to a sent query.
8775:
8776: =item queryreply
8777:
8778: Accept information from lonsql and make appropriate storage in temporary
8779: file space.
8780:
8781: =item idput
8782:
8783: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
8784: for each student, defined perhaps by the institutional Registrar.)
8785:
8786: =item idget
8787:
8788: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
8789: for each student, defined perhaps by the institutional Registrar.)
8790:
8791: =item iddel
8792:
8793: Deletes one or more ids in a domain's id database.
8794:
8795: =item tmpput
8796:
8797: Accept and store information in temporary space.
8798:
8799: =item tmpget
8800:
8801: Send along temporarily stored information.
8802:
8803: =item ls
8804:
8805: List part of a user's directory.
8806:
8807: =item pushtable
8808:
8809: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
8810: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
8811: must be restored manually in case of a problem with the new table file.
8812: pushtable requires that the request be encrypted and validated via
8813: ValidateManager. The form of the command is:
8814: enc:pushtable tablename <tablecontents> \n
8815: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
8816: cleartext newline.
8817:
8818: =item Hanging up (exit or init)
8819:
8820: What to do when a client tells the server that they (the client)
8821: are leaving the network.
8822:
8823: =item unknown command
8824:
8825: If B<lond> is sent an unknown command (not in the list above),
8826: it replys to the client "unknown_cmd".
8827:
8828:
8829: =item UNKNOWN CLIENT
8830:
8831: If the anti-spoofing algorithm cannot verify the client,
8832: the client is rejected (with a "refused" message sent
8833: to the client, and the connection is closed.
8834:
8835: =back
8836:
8837: =head1 PREREQUISITES
8838:
8839: IO::Socket
8840: IO::File
8841: Apache::File
8842: POSIX
8843: Crypt::IDEA
8844: GDBM_File
8845: Authen::Krb4
8846: Authen::Krb5
8847:
8848: =head1 COREQUISITES
8849:
8850: none
8851:
8852: =head1 OSNAMES
8853:
8854: linux
8855:
8856: =head1 SCRIPT CATEGORIES
8857:
8858: Server/Process
8859:
8860: =cut
8861:
8862:
8863: =pod
8864:
8865: =head1 LOG MESSAGES
8866:
8867: The messages below can be emitted in the lond log. This log is located
8868: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
8869: to provide coloring if examined from inside a web page. Some do not.
8870: Where color is used, the colors are; Red for sometihhng to get excited
8871: about and to follow up on. Yellow for something to keep an eye on to
8872: be sure it does not get worse, Green,and Blue for informational items.
8873:
8874: In the discussions below, sometimes reference is made to ~httpd
8875: when describing file locations. There isn't really an httpd
8876: user, however there is an httpd directory that gets installed in the
8877: place that user home directories go. On linux, this is usually
8878: (always?) /home/httpd.
8879:
8880:
8881: Some messages are colorless. These are usually (not always)
8882: Green/Blue color level messages.
8883:
8884: =over 2
8885:
8886: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
8887:
8888: A local connection negotiation was attempted by
8889: a host whose IP address was not 127.0.0.1.
8890: The socket is closed and the child will exit.
8891: lond has three ways to establish an encyrption
8892: key with a client:
8893:
8894: =over 2
8895:
8896: =item local
8897:
8898: The key is written and read from a file.
8899: This is only valid for connections from localhost.
8900:
8901: =item insecure
8902:
8903: The key is generated by the server and
8904: transmitted to the client.
8905:
8906: =item ssl (secure)
8907:
8908: An ssl connection is negotiated with the client,
8909: the key is generated by the server and sent to the
8910: client across this ssl connection before the
8911: ssl connectionis terminated and clear text
8912: transmission resumes.
8913:
8914: =back
8915:
8916: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
8917:
8918: The client is local but has not sent an initialization
8919: string that is the literal "init:local" The connection
8920: is closed and the child exits.
8921:
8922: =item Red CRITICAL Can't get key file <error>
8923:
8924: SSL key negotiation is being attempted but the call to
8925: lonssl::KeyFile failed. This usually means that the
8926: configuration file is not correctly defining or protecting
8927: the directories/files lonCertificateDirectory or
8928: lonnetPrivateKey
8929: <error> is a string that describes the reason that
8930: the key file could not be located.
8931:
8932: =item (Red) CRITICAL Can't get certificates <error>
8933:
8934: SSL key negotiation failed because we were not able to retrives our certificate
8935: or the CA's certificate in the call to lonssl::CertificateFile
8936: <error> is the textual reason this failed. Usual reasons:
8937:
8938: =over 2
8939:
8940: =item Apache config file for loncapa incorrect:
8941:
8942: one of the variables
8943: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
8944: undefined or incorrect
8945:
8946: =item Permission error:
8947:
8948: The directory pointed to by lonCertificateDirectory is not readable by lond
8949:
8950: =item Permission error:
8951:
8952: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
8953:
8954: =item Installation error:
8955:
8956: Either the certificate authority file or the certificate have not
8957: been installed in lonCertificateDirectory.
8958:
8959: =item (Red) CRITICAL SSL Socket promotion failed: <err>
8960:
8961: The promotion of the connection from plaintext to SSL failed
8962: <err> is the reason for the failure. There are two
8963: system calls involved in the promotion (one of which failed),
8964: a dup to produce
8965: a second fd on the raw socket over which the encrypted data
8966: will flow and IO::SOcket::SSL->new_from_fd which creates
8967: the SSL connection on the duped fd.
8968:
8969: =item (Blue) WARNING client did not respond to challenge
8970:
8971: This occurs on an insecure (non SSL) connection negotiation request.
8972: lond generates some number from the time, the PID and sends it to
8973: the client. The client must respond by echoing this information back.
8974: If the client does not do so, that's a violation of the challenge
8975: protocols and the connection will be failed.
8976:
8977: =item (Red) No manager table. Nobody can manage!!
8978:
8979: lond has the concept of privileged hosts that
8980: can perform remote management function such
8981: as update the hosts.tab. The manager hosts
8982: are described in the
8983: ~httpd/lonTabs/managers.tab file.
8984: this message is logged if this file is missing.
8985:
8986:
8987: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
8988:
8989: Reports the successful parse and registration
8990: of a specific manager.
8991:
8992: =item Green existing host <clustername:dnsname>
8993:
8994: The manager host is already defined in the hosts.tab
8995: the information in that table, rather than the info in the
8996: manager table will be used to determine the manager's ip.
8997:
8998: =item (Red) Unable to craete <filename>
8999:
9000: lond has been asked to create new versions of an administrative
9001: file (by a manager). When this is done, the new file is created
9002: in a temp file and then renamed into place so that there are always
9003: usable administrative files, even if the update fails. This failure
9004: message means that the temp file could not be created.
9005: The update is abandoned, and the old file is available for use.
9006:
9007: =item (Green) CopyFile from <oldname> to <newname> failed
9008:
9009: In an update of administrative files, the copy of the existing file to a
9010: backup file failed. The installation of the new file may still succeed,
9011: but there will not be a back up file to rever to (this should probably
9012: be yellow).
9013:
9014: =item (Green) Pushfile: backed up <oldname> to <newname>
9015:
9016: See above, the backup of the old administrative file succeeded.
9017:
9018: =item (Red) Pushfile: Unable to install <filename> <reason>
9019:
9020: The new administrative file could not be installed. In this case,
9021: the old administrative file is still in use.
9022:
9023: =item (Green) Installed new < filename>.
9024:
9025: The new administrative file was successfullly installed.
9026:
9027: =item (Red) Reinitializing lond pid=<pid>
9028:
9029: The lonc child process <pid> will be sent a USR2
9030: signal.
9031:
9032: =item (Red) Reinitializing self
9033:
9034: We've been asked to re-read our administrative files,and
9035: are doing so.
9036:
9037: =item (Yellow) error:Invalid process identifier <ident>
9038:
9039: A reinit command was received, but the target part of the
9040: command was not valid. It must be either
9041: 'lond' or 'lonc' but was <ident>
9042:
9043: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
9044:
9045: Checking to see if lond has been handed a valid edit
9046: command. It is possible the edit command is not valid
9047: in that case there are no log messages to indicate that.
9048:
9049: =item Result of password change for <username> pwchange_success
9050:
9051: The password for <username> was
9052: successfully changed.
9053:
9054: =item Unable to open <user> passwd to change password
9055:
9056: Could not rewrite the
9057: internal password file for a user
9058:
9059: =item Result of password change for <user> : <result>
9060:
9061: A unix password change for <user> was attempted
9062: and the pipe returned <result>
9063:
9064: =item LWP GET: <message> for <fname> (<remoteurl>)
9065:
9066: The lightweight process fetch for a resource failed
9067: with <message> the local filename that should
9068: have existed/been created was <fname> the
9069: corresponding URI: <remoteurl> This is emitted in several
9070: places.
9071:
9072: =item Unable to move <transname> to <destname>
9073:
9074: From fetch_user_file_handler - the user file was replicated but could not
9075: be mv'd to its final location.
9076:
9077: =item Looking for <domain> <username>
9078:
9079: From user_has_session_handler - This should be a Debug call instead
9080: it indicates lond is about to check whether the specified user has a
9081: session active on the specified domain on the local host.
9082:
9083: =item Client <ip> (<name>) hanging up: <input>
9084:
9085: lond has been asked to exit by its client. The <ip> and <name> identify the
9086: client systemand <input> is the full exit command sent to the server.
9087:
9088: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
9089:
9090: A lond child terminated. NOte that this termination can also occur when the
9091: child receives the QUIT or DIE signals. <pid> is the process id of the child,
9092: <hostname> the host lond is working for, and <message> the reason the child died
9093: to the best of our ability to get it (I would guess that any numeric value
9094: represents and errno value). This is immediately followed by
9095:
9096: =item Famous last words: Catching exception - <log>
9097:
9098: Where log is some recent information about the state of the child.
9099:
9100: =item Red CRITICAL: TIME OUT <pid>
9101:
9102: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
9103: doing an HTTP::GET.
9104:
9105: =item child <pid> died
9106:
9107: The reaper caught a SIGCHILD for the lond child process <pid>
9108: This should be modified to also display the IP of the dying child
9109: $children{$pid}
9110:
9111: =item Unknown child 0 died
9112: A child died but the wait for it returned a pid of zero which really should not
9113: ever happen.
9114:
9115: =item Child <which> - <pid> looks like we missed it's death
9116:
9117: When a sigchild is received, the reaper process checks all children to see if they are
9118: alive. If children are dying quite quickly, the lack of signal queuing can mean
9119: that a signal hearalds the death of more than one child. If so this message indicates
9120: which other one died. <which> is the ip of a dead child
9121:
9122: =item Free socket: <shutdownretval>
9123:
9124: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
9125: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
9126: to return anything. This is followed by:
9127:
9128: =item Red CRITICAL: Shutting down
9129:
9130: Just prior to exit.
9131:
9132: =item Free socket: <shutdownretval>
9133:
9134: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
9135: This is followed by:
9136:
9137: =item (Red) CRITICAL: Restarting
9138:
9139: lond is about to exec itself to restart.
9140:
9141: =item (Blue) Updating connections
9142:
9143: (In response to a USR2). All the children (except the one for localhost)
9144: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
9145:
9146: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
9147:
9148: Due to USR2 as above.
9149:
9150: =item (Green) keeping child for ip <ip> (pid = <pid>)
9151:
9152: In response to USR2 as above, the child indicated is not being restarted because
9153: it's assumed that we'll always need a child for the localhost.
9154:
9155:
9156: =item Going to check on the children
9157:
9158: Parent is about to check on the health of the child processes.
9159: Note that this is in response to a USR1 sent to the parent lond.
9160: there may be one or more of the next two messages:
9161:
9162: =item <pid> is dead
9163:
9164: A child that we have in our child hash as alive has evidently died.
9165:
9166: =item Child <pid> did not respond
9167:
9168: In the health check the child <pid> did not update/produce a pid_.txt
9169: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
9170: assumed to be hung in some un-fixable way.
9171:
9172: =item Finished checking children
9173:
9174: Master processs's USR1 processing is cojmplete.
9175:
9176: =item (Red) CRITICAL: ------- Starting ------
9177:
9178: (There are more '-'s on either side). Lond has forked itself off to
9179: form a new session and is about to start actual initialization.
9180:
9181: =item (Green) Attempting to start child (<client>)
9182:
9183: Started a new child process for <client>. Client is IO::Socket object
9184: connected to the child. This was as a result of a TCP/IP connection from a client.
9185:
9186: =item Unable to determine who caller was, getpeername returned nothing
9187:
9188: In child process initialization. either getpeername returned undef or
9189: a zero sized object was returned. Processing continues, but in my opinion,
9190: this should be cause for the child to exit.
9191:
9192: =item Unable to determine clientip
9193:
9194: In child process initialization. The peer address from getpeername was not defined.
9195: The client address is stored as "Unavailable" and processing continues.
9196:
9197: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
9198:
9199: In child initialization. A good connectionw as received from <ip>.
9200:
9201: =over 2
9202:
9203: =item <name>
9204:
9205: is the name of the client from hosts.tab.
9206:
9207: =item <type>
9208:
9209: Is the connection type which is either
9210:
9211: =over 2
9212:
9213: =item manager
9214:
9215: The connection is from a manager node, not in hosts.tab
9216:
9217: =item client
9218:
9219: the connection is from a non-manager in the hosts.tab
9220:
9221: =item both
9222:
9223: The connection is from a manager in the hosts.tab.
9224:
9225: =back
9226:
9227: =back
9228:
9229: =item (Blue) Certificates not installed -- trying insecure auth
9230:
9231: One of the certificate file, key file or
9232: certificate authority file could not be found for a client attempting
9233: SSL connection intiation. COnnection will be attemptied in in-secure mode.
9234: (this would be a system with an up to date lond that has not gotten a
9235: certificate from us).
9236:
9237: =item (Green) Successful local authentication
9238:
9239: A local connection successfully negotiated the encryption key.
9240: In this case the IDEA key is in a file (that is hopefully well protected).
9241:
9242: =item (Green) Successful ssl authentication with <client>
9243:
9244: The client (<client> is the peer's name in hosts.tab), has successfully
9245: negotiated an SSL connection with this child process.
9246:
9247: =item (Green) Successful insecure authentication with <client>
9248:
9249:
9250: The client has successfully negotiated an insecure connection withthe child process.
9251:
9252: =item (Yellow) Attempted insecure connection disallowed
9253:
9254: The client attempted and failed to successfully negotiate a successful insecure
9255: connection. This can happen either because the variable londAllowInsecure is false
9256: or undefined, or becuse the child did not successfully echo back the challenge
9257: string.
9258:
9259:
9260: =back
9261:
9262: =back
9263:
9264:
9265: =cut
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