Annotation of loncom/lond, revision 1.178.2.10
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.178.2.9 foxr 5: # $Id: lond,v 1.178.2.8 2004/03/16 10:52:30 foxr Exp $
1.60 www 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
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 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
1.178.2.1 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.143 foxr 48: use File::Copy;
1.169 foxr 49: use LONCAPA::ConfigFileEdit;
1.1 albertel 50:
1.178.2.2 foxr 51: my $DEBUG = 1; # Non zero to enable debug log entries.
1.77 foxr 52:
1.57 www 53: my $status='';
54: my $lastlog='';
55:
1.178.2.9 foxr 56: my $VERSION='$Revision: 1.178.2.8 $'; #' stupid emacs
1.121 albertel 57: my $remoteVERSION;
1.115 albertel 58: my $currenthostid;
59: my $currentdomainid;
1.134 albertel 60:
61: my $client;
1.140 foxr 62: my $clientip;
1.161 foxr 63: my $clientname;
1.140 foxr 64:
1.178.2.1 foxr 65: my $cipher; # Cipher key negotiated with client.
66: my $tmpsnum = 0;; # Id of tmpputs.
67:
1.134 albertel 68: my $server;
69: my $thisserver;
70:
1.178.2.1 foxr 71: #
72: # Connection type is:
73: # client - All client actions are allowed
74: # manager - only management functions allowed.
75: # both - Both management and client actions are allowed
76: #
77:
78: my $ConnectionType;
79:
80: my %hostid;
81: my %hostdom;
82: my %hostip;
83:
84: my %managers; # Ip -> manager names
85:
86: my %perlvar; # Will have the apache conf defined perl vars.
87:
88: #
89: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
90: # Each element of the hash contains a reference to an array that contains:
91: # A reference to a sub that executes the request corresponding to the keyword.
92: # A flag that is true if the request must be encoded to be acceptable.
93: # A mask with bits as follows:
94: # CLIENT_OK - Set when the function is allowed by ordinary clients
95: # MANAGER_OK - Set when the function is allowed to manager clients.
96: #
97: my $CLIENT_OK = 1;
98: my $MANAGER_OK = 2;
99: my %Dispatcher;
100:
101: #
102: # The array below are password error strings."
103: #
104: my $lastpwderror = 13; # Largest error number from lcpasswd.
105: my @passwderrors = ("ok",
106: "lcpasswd must be run as user 'www'",
107: "lcpasswd got incorrect number of arguments",
108: "lcpasswd did not get the right nubmer of input text lines",
109: "lcpasswd too many simultaneous pwd changes in progress",
110: "lcpasswd User does not exist.",
111: "lcpasswd Incorrect current passwd",
112: "lcpasswd Unable to su to root.",
113: "lcpasswd Cannot set new passwd.",
114: "lcpasswd Username has invalid characters",
115: "lcpasswd Invalid characters in password",
116: "11", "12",
117: "lcpasswd Password mismatch");
118:
119:
120: # The array below are lcuseradd error strings.:
121:
122: my $lastadderror = 13;
123: my @adderrors = ("ok",
124: "User ID mismatch, lcuseradd must run as user www",
125: "lcuseradd Incorrect number of command line parameters must be 3",
126: "lcuseradd Incorrect number of stdinput lines, must be 3",
127: "lcuseradd Too many other simultaneous pwd changes in progress",
128: "lcuseradd User does not exist",
129: "lcuseradd Unable to make www member of users's group",
130: "lcuseradd Unable to su to root",
131: "lcuseradd Unable to set password",
132: "lcuseradd Usrname has invalid characters",
133: "lcuseradd Password has an invalid character",
134: "lcuseradd User already exists",
135: "lcuseradd Could not add user.",
136: "lcuseradd Password mismatch");
137:
138: #
139: # Statistics that are maintained and dislayed in the status line.
140: #
141: my $Transactions; # Number of attempted transactions.
142: my $Failures; # Number of transcations failed.
143:
144: # ResetStatistics:
145: # Resets the statistics counters:
146: #
147: sub ResetStatistics {
148: $Transactions = 0;
149: $Failures = 0;
150: }
151:
152: #
153: # Return true if client is a manager.
154: #
155: sub isManager {
156: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
157: }
158: #
159: # Return tru if client can do client functions
160: #
161: sub isClient {
162: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
163: }
1.178.2.8 foxr 164: #
1.178.2.9 foxr 165: # Ties a domain level resource file to a hash.
166: # If requested a history entry is created in the associated hist file.
167: #
168: # Parameters:
169: # domain - Name of the domain in which the resource file lives.
170: # namespace - Name of the hash within that domain.
171: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
172: # loghead - Optional parameter, if present a log entry is created
173: # in the associated history file and this is the first part
174: # of that entry.
175: # logtail - Goes along with loghead, The actual logentry is of the
176: # form $loghead:<timestamp>:logtail.
177: # Returns:
178: # Reference to a hash bound to the db file or alternatively undef
179: # if the tie failed.
180: #
181: sub TieDomainHash {
182: my $domain = shift;
183: my $namespace = shift;
184: my $how = shift;
1.178.2.10! foxr 185:
1.178.2.9 foxr 186: # Filter out any whitespace in the domain name:
1.178.2.10! foxr 187:
1.178.2.9 foxr 188: $domain =~ s/\W//g;
1.178.2.10! foxr 189:
1.178.2.9 foxr 190: # We have enough to go on to tie the hash:
1.178.2.10! foxr 191:
! 192: my $UserTopDir = $perlvar{'lonUsersDir'};
1.178.2.9 foxr 193: my $DomainDir = $UserTopDir."/$domain";
194: my $ResourceFile = $DomainDir."/$namespace.db";
195: my %hash;
196: if(tie(%hash, 'GDBM_File', $ResourceFile, $how, 0640)) {
197: if (scalar @_) { # Need to log the operation.
198: my $logFh = IO::File->new(">>$DomainDir/$namespace.hist");
1.178.2.10! foxr 199: if($logFh) {
1.178.2.9 foxr 200: my $TimeStamp = time;
201: my ($loghead, $logtail) = @_;
1.178.2.10! foxr 202: print $logFh "$loghead:$TimeStamp:$logtail\n";
1.178.2.9 foxr 203: }
204: }
205: return \%hash; # Return the tied hash.
206: }
207: else {
208: return undef; # Tie failed.
209: }
210: }
211:
212: #
213: # Ties a user's resource file to a hash.
214: # If necessary, an appropriate history
1.178.2.8 foxr 215: # log file entry is made as well.
216: # This sub factors out common code from the subs that manipulate
217: # the various gdbm files that keep keyword value pairs.
218: # Parameters:
219: # domain - Name of the domain the user is in.
220: # user - Name of the 'current user'.
221: # namespace - Namespace representing the file to tie.
222: # how - What the tie is done to (e.g. GDBM_WRCREAT().
223: # loghead - Optional first part of log entry if there may be a
224: # history file.
225: # what - Optional tail of log entry if there may be a history
226: # file.
227: # Returns:
228: # hash to which the database is tied. It's up to the caller to untie.
229: # undef if the has could not be tied.
230: #
1.178.2.9 foxr 231: sub TieUserHash {
1.178.2.10! foxr 232: my $domain = shift;
! 233: my $user = shift;
! 234: my $namespace = shift;
! 235: my $how = shift;
! 236:
! 237: $namespace=~s/\//\_/g; # / -> _
! 238: $namespace=~s/\W//g; # whitespace eliminated.
! 239: my $proname = propath($domain, $user);
! 240:
! 241: # If this is a namespace for which a history is kept,
! 242: # make the history log entry:
! 243:
! 244:
! 245: unless ($namespace =~/^nohist\_/ && (scalar @_ > 0)) {
! 246: my $hfh = IO::File->new(">>$proname/$namespace.hist");
! 247: if($hfh) {
! 248: my $now = time;
! 249: my $loghead = shift;
! 250: my $what = shift;
! 251: print $hfh "$loghead:$now:$what\n";
! 252: }
! 253: }
! 254: # Tie the database.
! 255:
! 256: my %hash;
! 257: if(tie(%hash, 'GDBM_FILE', "$proname/$namespace.db",
! 258: $how, 0640)) {
! 259: return \%hash;
! 260: }
! 261: else {
! 262: return undef;
! 263: }
! 264:
1.178.2.8 foxr 265: }
1.178.2.1 foxr 266:
267: #
268: # Get a Request:
269: # Gets a Request message from the client. The transaction
270: # is defined as a 'line' of text. We remove the new line
271: # from the text line.
272: #
273: sub GetRequest {
274: my $input = <$client>;
275: chomp($input);
276:
277: Debug("Request = $input\n");
278:
279: &status('Processing '.$clientname.':'.$input);
280:
281: return $input;
282: }
283: #
284: # Decipher encoded traffic
285: # Parameters:
286: # input - Encoded data.
287: # Returns:
288: # Decoded data or undef if encryption key was not yet negotiated.
289: # Implicit input:
290: # cipher - This global holds the negotiated encryption key.
291: #
292: sub Decipher {
1.178.2.4 albertel 293: my $input = shift;
294: my $output = '';
1.178.2.1 foxr 295:
296:
1.178.2.4 albertel 297: if($cipher) {
298: my($enc, $enclength, $encinput) = split(/:/, $input);
299: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
300: $output .=
301: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
302: }
303: return substr($output, 0, $enclength);
304: } else {
305: return undef;
306: }
1.178.2.1 foxr 307: }
308:
309: #
310: # Register a command processor. This function is invoked to register a sub
311: # to process a request. Once registered, the ProcessRequest sub can automatically
312: # dispatch requests to an appropriate sub, and do the top level validity checking
313: # as well:
314: # - Is the keyword recognized.
315: # - Is the proper client type attempting the request.
316: # - Is the request encrypted if it has to be.
317: # Parameters:
318: # $RequestName - Name of the request being registered.
319: # This is the command request that will match
320: # against the hash keywords to lookup the information
321: # associated with the dispatch information.
322: # $Procedure - Reference to a sub to call to process the request.
323: # All subs get called as follows:
324: # Procedure($cmd, $tail, $replyfd, $key)
325: # $cmd - the actual keyword that invoked us.
326: # $tail - the tail of the request that invoked us.
327: # $replyfd- File descriptor connected to the client
328: # $MustEncode - True if the request must be encoded to be good.
329: # $ClientOk - True if it's ok for a client to request this.
330: # $ManagerOk - True if it's ok for a manager to request this.
331: # Side effects:
332: # - On success, the Dispatcher hash has an entry added for the key $RequestName
333: # - On failure, the program will die as it's a bad internal bug to try to
334: # register a duplicate command handler.
335: #
336: sub RegisterHandler {
1.178.2.4 albertel 337: my $RequestName = shift;
338: my $Procedure = shift;
339: my $MustEncode = shift;
340: my $ClientOk = shift;
341: my $ManagerOk = shift;
342:
343: # Don't allow duplication#
1.178.2.1 foxr 344:
1.178.2.4 albertel 345: if (defined $Dispatcher{$RequestName}) {
346: die "Attempting to define a duplicate request handler for $RequestName\n";
347: }
348: # Build the client type mask:
349:
350: my $ClientTypeMask = 0;
351: if($ClientOk) {
352: $ClientTypeMask |= $CLIENT_OK;
353: }
354: if($ManagerOk) {
355: $ClientTypeMask |= $MANAGER_OK;
356: }
357:
358: # Enter the hash:
1.178.2.1 foxr 359:
1.178.2.4 albertel 360: my @entry = ($Procedure, $MustEncode, $ClientTypeMask);
1.178.2.1 foxr 361:
1.178.2.4 albertel 362: $Dispatcher{$RequestName} = \@entry;
1.178.2.1 foxr 363:
364:
365: }
366:
367: #--------------------- Request Handlers --------------------------------------------
368: #
369: # By convention each request handler registers itself prior to the sub declaration:
370: #
371:
372: # Handles ping requests.
373: # Parameters:
374: # $cmd - the actual keyword that invoked us.
375: # $tail - the tail of the request that invoked us.
376: # $replyfd- File descriptor connected to the client
377: # Implicit Inputs:
378: # $currenthostid - Global variable that carries the name of the host we are
379: # known as.
380: # Returns:
381: # 1 - Ok to continue processing.
382: # 0 - Program should exit.
383: # Side effects:
384: # Reply information is sent to the client.
385:
386: sub PingHandler {
1.178.2.4 albertel 387: my $cmd = shift;
388: my $tail = shift;
389: my $client = shift;
1.178.2.1 foxr 390:
1.178.2.4 albertel 391: Reply( $client,"$currenthostid\n","$cmd:$tail");
1.178.2.1 foxr 392:
1.178.2.4 albertel 393: return 1;
1.178.2.1 foxr 394: }
395: RegisterHandler("ping", \&PingHandler, 0, 1, 1); # Ping unencoded, client or manager.
396: #
397: # Handles pong reequests:
398: # Parameters:
399: # $cmd - the actual keyword that invoked us.
400: # $tail - the tail of the request that invoked us.
401: # $replyfd- File descriptor connected to the client
402: # Implicit Inputs:
403: # $currenthostid - Global variable that carries the name of the host we are
404: # connected to.
405: # Returns:
406: # 1 - Ok to continue processing.
407: # 0 - Program should exit.
408: # Side effects:
409: # Reply information is sent to the client.
410:
411: sub PongHandler {
1.178.2.4 albertel 412: my $cmd = shift;
413: my $tail = shift;
414: my $replyfd = shift;
415:
416: my $reply=&reply("ping",$clientname);
417: Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
418: return 1;
1.178.2.1 foxr 419: }
420: RegisterHandler("pong", \&PongHandler, 0, 1, 1); # Pong unencoded, client or manager
421:
422: #
423: # EstablishKeyHandler:
424: # Called to establish an encrypted session key with the remote client.
425: #
426: # Parameters:
427: # $cmd - the actual keyword that invoked us.
428: # $tail - the tail of the request that invoked us.
429: # $replyfd- File descriptor connected to the client
430: # Implicit Inputs:
431: # $currenthostid - Global variable that carries the name of the host
432: # known as.
433: # $clientname - Global variable that carries the name of the hsot we're connected to.
434: # Returns:
435: # 1 - Ok to continue processing.
436: # 0 - Program should exit.
437: # Implicit Outputs:
438: # Reply information is sent to the client.
439: # $cipher is set with a reference to a new IDEA encryption object.
440: #
441: sub EstablishKeyHandler {
1.178.2.4 albertel 442: my $cmd = shift;
443: my $tail = shift;
444: my $replyfd = shift;
445:
446: my $buildkey=time.$$.int(rand 100000);
447: $buildkey=~tr/1-6/A-F/;
448: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
449: my $key=$currenthostid.$clientname;
450: $key=~tr/a-z/A-Z/;
451: $key=~tr/G-P/0-9/;
452: $key=~tr/Q-Z/0-9/;
453: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
454: $key=substr($key,0,32);
455: my $cipherkey=pack("H32",$key);
456: $cipher=new IDEA $cipherkey;
457: Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1.178.2.1 foxr 458:
1.178.2.4 albertel 459: return 1;
1.178.2.1 foxr 460:
461: }
462: RegisterHandler("ekey", \&EstablishKeyHandler, 0, 1,1);
463:
464: # LoadHandler:
465: # Handler for the load command. Returns the current system load average
466: # to the requestor.
467: #
468: # Parameters:
469: # $cmd - the actual keyword that invoked us.
470: # $tail - the tail of the request that invoked us.
471: # $replyfd- File descriptor connected to the client
472: # Implicit Inputs:
473: # $currenthostid - Global variable that carries the name of the host
474: # known as.
475: # $clientname - Global variable that carries the name of the hsot we're connected to.
476: # Returns:
477: # 1 - Ok to continue processing.
478: # 0 - Program should exit.
479: # Side effects:
480: # Reply information is sent to the client.
481: sub LoadHandler {
1.178.2.4 albertel 482: my $cmd = shift;
483: my $tail = shift;
484: my $replyfd = shift;
1.178.2.1 foxr 485:
486: # Get the load average from /proc/loadavg and calculate it as a percentage of
487: # the allowed load limit as set by the perl global variable lonLoadLim
488:
1.178.2.4 albertel 489: my $loadavg;
490: my $loadfile=IO::File->new('/proc/loadavg');
1.178.2.1 foxr 491:
1.178.2.4 albertel 492: $loadavg=<$loadfile>;
493: $loadavg =~ s/\s.*//g; # Extract the first field only.
1.178.2.1 foxr 494:
1.178.2.4 albertel 495: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1.178.2.1 foxr 496:
1.178.2.4 albertel 497: Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1.178.2.1 foxr 498:
1.178.2.4 albertel 499: return 1;
1.178.2.1 foxr 500: }
501: RegisterHandler("load", \&LoadHandler, 0, 1, 0);
502:
503:
504: #
505: # Process the userload request. This sub returns to the client the current
506: # user load average. It can be invoked either by clients or managers.
507: #
508: # Parameters:
509: # $cmd - the actual keyword that invoked us.
510: # $tail - the tail of the request that invoked us.
511: # $replyfd- File descriptor connected to the client
512: # Implicit Inputs:
513: # $currenthostid - Global variable that carries the name of the host
514: # known as.
515: # $clientname - Global variable that carries the name of the hsot we're connected to.
516: # Returns:
517: # 1 - Ok to continue processing.
518: # 0 - Program should exit
519: # Implicit inputs:
520: # whatever the userload() function requires.
521: # Implicit outputs:
522: # the reply is written to the client.
523: #
524: sub UserLoadHandler {
1.178.2.4 albertel 525: my $cmd = shift;
526: my $tail = shift;
527: my $replyfd = shift;
1.178.2.1 foxr 528:
1.178.2.4 albertel 529: my $userloadpercent=&userload();
530: Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
531:
532: return 1;
1.178.2.1 foxr 533: }
534: RegisterHandler("userload", \&UserLoadHandler, 0, 1, 0);
535:
536: # Process a request for the authorization type of a user:
537: # (userauth).
538: #
539: # Parameters:
540: # $cmd - the actual keyword that invoked us.
541: # $tail - the tail of the request that invoked us.
542: # $replyfd- File descriptor connected to the client
543: # Returns:
544: # 1 - Ok to continue processing.
545: # 0 - Program should exit
546: # Implicit outputs:
547: # The user authorization type is written to the client.
548: #
549: sub UserAuthorizationType {
1.178.2.4 albertel 550: my $cmd = shift;
551: my $tail = shift;
552: my $replyfd = shift;
553:
554: my $userinput = "$cmd:$tail";
555:
556: # Pull the domain and username out of the command tail.
557: # and call GetAuthType to determine the authentication type.
558:
559: my ($udom,$uname)=split(/:/,$tail);
560: my $result = GetAuthType($udom, $uname);
561: if($result eq "nouser") {
562: Failure( $replyfd, "unknown_user\n", $userinput);
563: } else {
1.178.2.8 foxr 564: #
565: # We only want to pass the second field from GetAuthType
566: # for ^krb.. otherwise we'll be handing out the encrypted
567: # password for internals e.g.
568: #
569: my ($type,$otherinfo) = split(/:/,$result);
570: if($type =~ /^krb/) {
571: $type = $result;
572: }
573: Reply( $replyfd, "$type\n", $userinput);
1.178.2.4 albertel 574: }
1.178.2.1 foxr 575:
1.178.2.4 albertel 576: return 1;
1.178.2.1 foxr 577: }
578: RegisterHandler("currentauth", \&UserAuthorizationType, 1, 1, 0);
579: #
580: # Process a request by a manager to push a hosts or domain table
581: # to us. We pick apart the command and pass it on to the subs
582: # that already exist to do this.
583: #
584: # Parameters:
585: # $cmd - the actual keyword that invoked us.
586: # $tail - the tail of the request that invoked us.
587: # $client - File descriptor connected to the client
588: # Returns:
589: # 1 - Ok to continue processing.
590: # 0 - Program should exit
591: # Implicit Output:
592: # a reply is written to the client.
593:
594: sub PushFileHandler {
1.178.2.4 albertel 595: my $cmd = shift;
596: my $tail = shift;
597: my $client = shift;
1.178.2.1 foxr 598:
1.178.2.4 albertel 599: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 600:
1.178.2.4 albertel 601: # At this time we only know that the IP of our partner is a valid manager
602: # the code below is a hook to do further authentication (e.g. to resolve
603: # spoofing).
1.178.2.1 foxr 604:
1.178.2.4 albertel 605: my $cert = GetCertificate($userinput);
606: if(ValidManager($cert)) {
1.178.2.1 foxr 607:
1.178.2.4 albertel 608: # Now presumably we have the bona fides of both the peer host and the
609: # process making the request.
1.178.2.1 foxr 610:
1.178.2.4 albertel 611: my $reply = PushFile($userinput);
612: Reply($client, "$reply\n", $userinput);
1.178.2.1 foxr 613:
1.178.2.4 albertel 614: } else {
615: Failure( $client, "refused\n", $userinput);
616: }
1.178.2.1 foxr 617: }
618: RegisterHandler("pushfile", \&PushFileHandler, 1, 0, 1);
619:
620:
621:
622: # Process a reinit request. Reinit requests that either
623: # lonc or lond be reinitialized so that an updated
624: # host.tab or domain.tab can be processed.
625: #
626: # Parameters:
627: # $cmd - the actual keyword that invoked us.
628: # $tail - the tail of the request that invoked us.
629: # $client - File descriptor connected to the client
630: # Returns:
631: # 1 - Ok to continue processing.
632: # 0 - Program should exit
633: # Implicit output:
634: # a reply is sent to the client.
635: #
636: sub ReinitProcessHandler {
1.178.2.4 albertel 637: my $cmd = shift;
638: my $tail = shift;
639: my $client = shift;
640:
641: my $userinput = "$cmd:$tail";
642:
643: my $cert = GetCertificate($userinput);
644: if(ValidManager($cert)) {
645: chomp($userinput);
646: my $reply = ReinitProcess($userinput);
647: Reply( $client, "$reply\n", $userinput);
648: } else {
649: Failure( $client, "refused\n", $userinput);
650: }
651: return 1;
1.178.2.1 foxr 652: }
653:
654: RegisterHandler("reinit", \&ReinitProcessHandler, 1, 0, 1);
655:
656: # Process the editing script for a table edit operation.
657: # the editing operation must be encrypted and requested by
658: # a manager host.
659: #
660: # Parameters:
661: # $cmd - the actual keyword that invoked us.
662: # $tail - the tail of the request that invoked us.
663: # $client - File descriptor connected to the client
664: # Returns:
665: # 1 - Ok to continue processing.
666: # 0 - Program should exit
667: # Implicit output:
668: # a reply is sent to the client.
669: #
670: sub EditTableHandler {
1.178.2.4 albertel 671: my $command = shift;
672: my $tail = shift;
673: my $client = shift;
674:
675: my $userinput = "$command:$tail";
676:
677: my $cert = GetCertificate($userinput);
678: if(ValidManager($cert)) {
679: my($filetype, $script) = split(/:/, $tail);
680: if (($filetype eq "hosts") ||
681: ($filetype eq "domain")) {
682: if($script ne "") {
683: Reply($client, # BUGBUG - EditFile
684: EditFile($userinput), # could fail.
685: $userinput);
686: } else {
687: Failure($client,"refused\n",$userinput);
688: }
689: } else {
690: Failure($client,"refused\n",$userinput);
691: }
692: } else {
693: Failure($client,"refused\n",$userinput);
694: }
695: return 1;
1.178.2.1 foxr 696: }
697: RegisterHandler("edit", \&EditTableHandler, 1, 0, 1);
698:
699:
700: #
701: # Authenticate a user against the LonCAPA authentication
702: # database. Note that there are several authentication
703: # possibilities:
704: # - unix - The user can be authenticated against the unix
705: # password file.
706: # - internal - The user can be authenticated against a purely
707: # internal per user password file.
708: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
709: # ticket granting authority.
1.178.2.4 albertel 710: # - user - The person tailoring LonCAPA can supply a user authentication
711: # mechanism that is per system.
1.178.2.1 foxr 712: #
713: # Parameters:
714: # $cmd - The command that got us here.
715: # $tail - Tail of the command (remaining parameters).
716: # $client - File descriptor connected to client.
717: # Returns
718: # 0 - Requested to exit, caller should shut down.
719: # 1 - Continue processing.
720: # Implicit inputs:
721: # The authentication systems describe above have their own forms of implicit
722: # input into the authentication process that are described above.
723: #
724: sub AuthenticateHandler {
1.178.2.4 albertel 725: my $cmd = shift;
726: my $tail = shift;
727: my $client = shift;
1.178.2.10! foxr 728:
1.178.2.4 albertel 729: # Regenerate the full input line
1.178.2.10! foxr 730:
1.178.2.4 albertel 731: my $userinput = $cmd.":".$tail;
1.178.2.10! foxr 732:
1.178.2.4 albertel 733: # udom - User's domain.
734: # uname - Username.
735: # upass - User's password.
1.178.2.10! foxr 736:
1.178.2.4 albertel 737: my ($udom,$uname,$upass)=split(/:/,$tail);
738: Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
739: chomp($upass);
740: $upass=unescape($upass);
741:
1.178.2.8 foxr 742: # Fetch the user authentication information:
743:
744: my $realpasswd = GetAuthType($udom, $uname);
745: if($realpasswd ne "nouser") { # nouser means no passwd file.
1.178.2.4 albertel 746: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
747: my $pwdcorrect=0;
748: #
749: # Authenticate against password stored in the internal file.
750: #
751: Debug("Authenticating via $howpwd");
752: if ($howpwd eq 'internal') {
753: &Debug("Internal auth");
754: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
755: #
756: # Authenticate against the unix password file.
757: #
758: } elsif ($howpwd eq 'unix') {
759: &Debug("Unix auth");
760: if((getpwnam($uname))[1] eq "") { #no such user!
761: $pwdcorrect = 0;
762: } else {
763: $contentpwd=(getpwnam($uname))[1];
764: my $pwauth_path="/usr/local/sbin/pwauth";
1.178.2.8 foxr 765: unless ($contentpwd eq 'x') { # Not in shadow file.
1.178.2.4 albertel 766: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
1.178.2.8 foxr 767: } elsif (-e $pwauth_path) { # In shadow file so
768: open PWAUTH, "|$pwauth_path" or # use external program
1.178.2.4 albertel 769: die "Cannot invoke authentication";
770: print PWAUTH "$uname\n$upass\n";
771: close PWAUTH;
772: $pwdcorrect=!$?;
773: }
774: }
775: #
776: # Authenticate against a Kerberos 4 server:
777: #
778: } elsif ($howpwd eq 'krb4') {
779: my $null=pack("C",0);
780: unless ($upass=~/$null/) {
781: my $krb4_error = &Authen::Krb4::get_pw_in_tkt($uname,
782: "",
783: $contentpwd,
784: 'krbtgt',
785: $contentpwd,
786: 1,
787: $upass);
788: if (!$krb4_error) {
789: $pwdcorrect = 1;
790: } else {
791: $pwdcorrect=0;
792: # log error if it is not a bad password
793: if ($krb4_error != 62) {
794: &logthis('krb4:'.$uname.','.$contentpwd.','.
795: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
796: }
797: }
798: }
799: #
800: # Authenticate against a Kerberos 5 server:
801: #
802: } elsif ($howpwd eq 'krb5') {
803: my $null=pack("C",0);
804: unless ($upass=~/$null/) {
805: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
806: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
807: my $krbserver=&Authen::Krb5::parse_name($krbservice);
808: my $credentials=&Authen::Krb5::cc_default();
809: $credentials->initialize($krbclient);
810: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
811: $krbserver,
812: $upass,
813: $credentials);
814: $pwdcorrect = ($krbreturn == 1);
815: } else {
816: $pwdcorrect=0;
817: }
818: #
819: # Finally, the user may have written in an authentication module.
820: # in that case, if requested, authenticate against it.
821: #
822: } elsif ($howpwd eq 'localauth') {
823: $pwdcorrect=&localauth::localauth($uname,$upass,$contentpwd);
824: }
825: #
826: # Successfully authorized.
827: #
828: if ($pwdcorrect) {
829: Reply( $client, "authorized\n", $userinput);
830: #
831: # Bad credentials: Failed to authorize
832: #
833: } else {
834: Failure( $client, "non_authorized\n", $userinput);
835: }
1.178.2.8 foxr 836: # Used to be unknown_user but that allows crackers to
837: # distinguish between bad username and bad password so...
838: #
1.178.2.4 albertel 839: } else {
1.178.2.8 foxr 840: Failure( $client, "non_authorized\n", $userinput);
1.178.2.4 albertel 841: }
842: return 1;
1.178.2.1 foxr 843: }
844: RegisterHandler("auth", \&AuthenticateHandler, 1, 1, 0);
845:
846: #
847: # Change a user's password. Note that this function is complicated by
848: # the fact that a user may be authenticated in more than one way:
849: # At present, we are not able to change the password for all types of
850: # authentication methods. Only for:
851: # unix - unix password or shadow passoword style authentication.
852: # local - Locally written authentication mechanism.
853: # For now, kerb4 and kerb5 password changes are not supported and result
854: # in an error.
855: # FUTURE WORK:
856: # Support kerberos passwd changes?
857: # Parameters:
858: # $cmd - The command that got us here.
859: # $tail - Tail of the command (remaining parameters).
860: # $client - File descriptor connected to client.
861: # Returns
862: # 0 - Requested to exit, caller should shut down.
863: # 1 - Continue processing.
864: # Implicit inputs:
865: # The authentication systems describe above have their own forms of implicit
866: # input into the authentication process that are described above.
867: sub ChangePasswordHandler {
1.178.2.4 albertel 868: my $cmd = shift;
869: my $tail = shift;
870: my $client = shift;
871:
872: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
873:
874: #
875: # udom - user's domain.
876: # uname - Username.
877: # upass - Current password.
878: # npass - New password.
879:
880: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
881: chomp($npass);
882: $upass=&unescape($upass);
883: $npass=&unescape($npass);
884: &Debug("Trying to change password for $uname");
1.178.2.8 foxr 885: my $realpasswd = GetAuthType($udom, $uname);
886: if ($realpasswd ne "nouser") {
1.178.2.4 albertel 887: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
888: if ($howpwd eq 'internal') {
889: &Debug("internal auth");
890: if (crypt($upass,$contentpwd) eq $contentpwd) {
891: my $salt=time;
892: $salt=substr($salt,6,2);
893: my $ncpass=crypt($npass,$salt);
1.178.2.8 foxr 894: if(RewritePwFile($udom, $uname, "internal:$ncpass")) {
895: &logthis("Result of password change for "
896: ."$uname: pwchange_success");
897: Reply($client, "ok\n", $userinput);
898: } else {
899: &logthis("Unable to open $uname passwd "
900: ."to change password");
901: Failure( $client, "non_authorized\n",$userinput);
902: }
1.178.2.4 albertel 903: } else {
904: Failure($client, "non_authorized\n", $userinput);
905: }
906: } elsif ($howpwd eq 'unix') {
907: # Unix means we have to access /etc/password
908: # one way or another.
909: # First: Make sure the current password is
910: # correct
911: &Debug("auth is unix");
912: $contentpwd=(getpwnam($uname))[1];
913: my $pwdcorrect = "0";
914: my $pwauth_path="/usr/local/sbin/pwauth";
915: unless ($contentpwd eq 'x') {
916: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
917: } elsif (-e $pwauth_path) {
918: open PWAUTH, "|$pwauth_path" or
919: die "Cannot invoke authentication";
920: print PWAUTH "$uname\n$upass\n";
921: close PWAUTH;
922: &Debug("exited pwauth with $? ($uname,$upass) ");
923: $pwdcorrect=($? == 0);
924: }
925: if ($pwdcorrect) {
926: my $execdir=$perlvar{'lonDaemons'};
927: &Debug("Opening lcpasswd pipeline");
928: my $pf = IO::File->new("|$execdir/lcpasswd > "
929: ."$perlvar{'lonDaemons'}"
930: ."/logs/lcpasswd.log");
931: print $pf "$uname\n$npass\n$npass\n";
932: close $pf;
933: my $err = $?;
934: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
935: &logthis("Result of password change for $uname: ".
936: &lcpasswdstrerror($?));
937: Reply($client, "$result\n", $userinput);
938: } else {
939: Reply($client, "non_authorized\n", $userinput);
940: }
941: } else {
1.178.2.8 foxr 942: # this just means that the current password mode is not
943: # one we know how to change (e.g the kerberos auth modes or
944: # locally written auth handler).
945: #
1.178.2.4 albertel 946: Reply( $client, "auth_mode_error\n", $userinput);
947: }
948: } else {
1.178.2.8 foxr 949: # used to be unknonw user but that gives out too much info..
950: # so make it the same as if the initial passwd was bad.
951: #
952: Reply( $client, "non_authorized\n", $userinput);
1.178.2.4 albertel 953: }
954: return 1;
1.178.2.1 foxr 955: }
956: RegisterHandler("passwd", \&ChangePasswordHandler, 1, 1, 0);
957:
958: #
959: # Create a new user. User in this case means a lon-capa user.
960: # The user must either already exist in some authentication realm
961: # like kerberos or the /etc/passwd. If not, a user completely local to
962: # this loncapa system is created.
963: #
964: # Parameters:
965: # $cmd - The command that got us here.
966: # $tail - Tail of the command (remaining parameters).
967: # $client - File descriptor connected to client.
968: # Returns
969: # 0 - Requested to exit, caller should shut down.
970: # 1 - Continue processing.
971: # Implicit inputs:
972: # The authentication systems describe above have their own forms of implicit
973: # input into the authentication process that are described above.
974: sub AddUserHandler {
1.178.2.4 albertel 975: my $cmd = shift;
976: my $tail = shift;
977: my $client = shift;
978:
979: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1.178.2.8 foxr 980: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
981:
1.178.2.4 albertel 982: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1.178.2.8 foxr 983:
984:
985: if($udom eq $currentdomainid) { # Reject new users for other domains...
986:
987: my $oldumask=umask(0077);
988: chomp($npass);
989: $npass=&unescape($npass);
990: my $passfilename = PasswordPath($udom, $uname);
991: &Debug("Password file created will be:".$passfilename);
992: if (-e $passfilename) {
993: Failure( $client, "already_exists\n", $userinput);
994: } else {
995: my @fpparts=split(/\//,$passfilename);
996: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
997: my $fperror='';
998: for (my $i=3;$i<= ($#fpparts-1);$i++) {
999: $fpnow.='/'.$fpparts[$i];
1000: unless (-e $fpnow) {
1001: unless (mkdir($fpnow,0777)) {
1002: $fperror="error: ".($!+0)." mkdir failed while attempting "
1003: ."makeuser";
1004: }
1.178.2.4 albertel 1005: }
1006: }
1.178.2.8 foxr 1007: unless ($fperror) {
1008: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1009: Reply($client, $result, $userinput); #BUGBUG - could be fail
1010: } else {
1011: Failure($client, "$fperror\n", $userinput);
1012: }
1.178.2.4 albertel 1013: }
1.178.2.8 foxr 1014: umask($oldumask);
1015: } else {
1016: Failure($client, "not_right_domain\n",
1017: $userinput); # Even if we are multihomed.
1018:
1.178.2.4 albertel 1019: }
1020: return 1;
1.178.2.1 foxr 1021:
1022: }
1023: RegisterHandler("makeuser", \&AddUserHandler, 1, 1, 0);
1024:
1025: #
1026: # Change the authentication method of a user. Note that this may
1027: # also implicitly change the user's password if, for example, the user is
1028: # joining an existing authentication realm. Known authentication realms at
1029: # this time are:
1030: # internal - Purely internal password file (only loncapa knows this user)
1031: # local - Institutionally written authentication module.
1032: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1033: # kerb4 - kerberos version 4
1034: # kerb5 - kerberos version 5
1035: #
1036: # Parameters:
1037: # $cmd - The command that got us here.
1038: # $tail - Tail of the command (remaining parameters).
1039: # $client - File descriptor connected to client.
1040: # Returns
1041: # 0 - Requested to exit, caller should shut down.
1042: # 1 - Continue processing.
1043: # Implicit inputs:
1044: # The authentication systems describe above have their own forms of implicit
1045: # input into the authentication process that are described above.
1046: #
1047: sub ChangeAuthenticationHandler {
1.178.2.4 albertel 1048: my $cmd = shift;
1049: my $tail = shift;
1050: my $client = shift;
1051:
1052: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1053:
1054: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1055: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1056: if ($udom ne $currentdomainid) {
1057: Failure( $client, "not_right_domain\n", $client);
1058: } else {
1.178.2.8 foxr 1059:
1060: chomp($npass);
1061:
1062: $npass=&unescape($npass);
1063: my $passfilename = PasswordPath($udom, $uname);
1064: if ($passfilename) { # Not allowed to create a new user!!
1065: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1066: Reply($client, $result, $userinput);
1067: } else {
1068: Failure($client, "non_authorized", $userinput); # Fail the user now.
1069: }
1.178.2.4 albertel 1070: }
1071: return 1;
1.178.2.1 foxr 1072: }
1073: RegisterHandler("changeuserauth", \&ChangeAuthenticationHandler, 1,1, 0);
1074:
1075: #
1076: # Determines if this is the home server for a user. The home server
1077: # for a user will have his/her lon-capa passwd file. Therefore all we need
1078: # to do is determine if this file exists.
1079: #
1080: # Parameters:
1081: # $cmd - The command that got us here.
1082: # $tail - Tail of the command (remaining parameters).
1083: # $client - File descriptor connected to client.
1084: # Returns
1085: # 0 - Requested to exit, caller should shut down.
1086: # 1 - Continue processing.
1087: # Implicit inputs:
1088: # The authentication systems describe above have their own forms of implicit
1089: # input into the authentication process that are described above.
1090: #
1091: sub IsHomeHandler {
1.178.2.4 albertel 1092: my $cmd = shift;
1093: my $tail = shift;
1094: my $client = shift;
1095:
1096: my $userinput = "$cmd:$tail";
1097:
1098: my ($udom,$uname)=split(/:/,$tail);
1099: chomp($uname);
1.178.2.8 foxr 1100: my $passfile = PasswordPath($udom, $uname);
1101: if($passfile) {
1.178.2.4 albertel 1102: Reply( $client, "found\n", $userinput);
1103: } else {
1104: Failure($client, "not_found\n", $userinput);
1105: }
1106: return 1;
1.178.2.1 foxr 1107: }
1108: RegisterHandler("home", \&IsHomeHandler, 0,1,0);
1109: #
1110: # Process an update request for a resource?? I think what's going on here is
1111: # that a resource has been modified that we hold a subscription to.
1112: # If the resource is not local, then we must update, or at least invalidate our
1113: # cached copy of the resource.
1114: # FUTURE WORK:
1115: # I need to look at this logic carefully. My druthers would be to follow
1116: # typical caching logic, and simple invalidate the cache, drop any subscription
1117: # an let the next fetch start the ball rolling again... however that may
1118: # actually be more difficult than it looks given the complex web of
1119: # proxy servers.
1120: # Parameters:
1121: # $cmd - The command that got us here.
1122: # $tail - Tail of the command (remaining parameters).
1123: # $client - File descriptor connected to client.
1124: # Returns
1125: # 0 - Requested to exit, caller should shut down.
1126: # 1 - Continue processing.
1127: # Implicit inputs:
1128: # The authentication systems describe above have their own forms of implicit
1129: # input into the authentication process that are described above.
1130: #
1131: sub UpdateResourceHandler {
1.178.2.4 albertel 1132: my $cmd = shift;
1133: my $tail = shift;
1134: my $client = shift;
1135:
1136: my $userinput = "$cmd:$tail";
1137:
1138: my $fname=$tail;
1139: my $ownership=ishome($fname);
1140: if ($ownership eq 'not_owner') {
1141: if (-e $fname) {
1142: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1143: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1144: my $now=time;
1145: my $since=$now-$atime;
1146: if ($since>$perlvar{'lonExpire'}) {
1147: my $reply=&reply("unsub:$fname","$clientname");
1148: unlink("$fname");
1149: } else {
1150: my $transname="$fname.in.transfer";
1151: my $remoteurl=&reply("sub:$fname","$clientname");
1152: my $response;
1153: alarm(120);
1154: {
1155: my $ua=new LWP::UserAgent;
1156: my $request=new HTTP::Request('GET',"$remoteurl");
1157: $response=$ua->request($request,$transname);
1158: }
1159: alarm(0);
1160: if ($response->is_error()) {
1161: unlink($transname);
1162: my $message=$response->status_line;
1163: &logthis("LWP GET: $message for $fname ($remoteurl)");
1164: } else {
1165: if ($remoteurl!~/\.meta$/) {
1166: alarm(120);
1167: {
1168: my $ua=new LWP::UserAgent;
1169: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1170: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1171: if ($mresponse->is_error()) {
1172: unlink($fname.'.meta');
1173: }
1174: }
1175: alarm(0);
1176: }
1177: rename($transname,$fname);
1178: }
1179: }
1180: Reply( $client, "ok\n", $userinput);
1181: } else {
1182: Failure($client, "not_found\n", $userinput);
1183: }
1184: } else {
1185: Failure($client, "rejected\n", $userinput);
1186: }
1187: return 1;
1.178.2.1 foxr 1188: }
1189: RegisterHandler("update", \&UpdateResourceHandler, 0 ,1, 0);
1190:
1191: #
1192: # Fetch a user file from a remote server:
1193: # Parameters:
1194: # $cmd - The command that got us here.
1195: # $tail - Tail of the command (remaining parameters).
1196: # $client - File descriptor connected to client.
1197: # Returns
1198: # 0 - Requested to exit, caller should shut down.
1199: # 1 - Continue processing.
1200: #
1201: sub FetchUserFileHandler {
1.178.2.4 albertel 1202: my $cmd = shift;
1203: my $tail = shift;
1204: my $client = shift;
1205:
1206: my $userinput = "$cmd:$tail";
1207: my $fname = $tail;
1208: my ($udom,$uname,$ufile)=split(/\//,$fname);
1209: my $udir=propath($udom,$uname).'/userfiles';
1210: unless (-e $udir) {
1211: mkdir($udir,0770);
1212: }
1213: if (-e $udir) {
1214: $ufile=~s/^[\.\~]+//;
1215: $ufile=~s/\///g;
1216: my $destname=$udir.'/'.$ufile;
1217: my $transname=$udir.'/'.$ufile.'.in.transit';
1218: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1219: my $response;
1220: alarm(120);
1221: {
1222: my $ua=new LWP::UserAgent;
1223: my $request=new HTTP::Request('GET',"$remoteurl");
1224: $response=$ua->request($request,$transname);
1225: }
1226: alarm(0);
1227: if ($response->is_error()) {
1228: unlink($transname);
1229: my $message=$response->status_line;
1230: &logthis("LWP GET: $message for $fname ($remoteurl)");
1231: Failure($client, "failed\n", $userinput);
1232: } else {
1233: if (!rename($transname,$destname)) {
1234: &logthis("Unable to move $transname to $destname");
1235: unlink($transname);
1236: Failure($client, "failed\n", $userinput);
1237: } else {
1238: Reply($client, "ok\n", $userinput);
1239: }
1240: }
1241: } else {
1242: Failure($client, "not_home\n", $userinput);
1243: }
1244: return 1;
1.178.2.1 foxr 1245: }
1246: RegisterHandler("fetchuserfile", \&FetchUserFileHandler, 0, 1, 0);
1247: #
1248: # Authenticate access to a user file. Question? The token for athentication
1249: # is allowed to be sent as cleartext is this really what we want? This token
1.178.2.8 foxr 1250: # represents the user's session id. Once it is forged does this allow too much
1251: # access??
1.178.2.1 foxr 1252: #
1253: # Parameters:
1254: # $cmd - The command that got us here.
1255: # $tail - Tail of the command (remaining parameters).
1256: # $client - File descriptor connected to client.
1257: # Returns
1258: # 0 - Requested to exit, caller should shut down.
1259: # 1 - Continue processing.
1260: sub AuthenticateUserFileAccess {
1.178.2.8 foxr 1261: my $cmd = shift;
1262: my $tail = shift;
1263: my $client = shift;
1.178.2.4 albertel 1264: my $userinput = "$cmd:$tail";
1265:
1266: my ($fname,$session)=split(/:/,$tail);
1267: chomp($session);
1268: my $reply='non_auth';
1269: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.$session.'.id')) {
1270: while (my $line=<ENVIN>) {
1271: if ($line=~/userfile\.$fname\=/) {
1272: $reply='ok';
1273: }
1274: }
1275: close(ENVIN);
1276: Reply($client, $reply."\n", $userinput);
1277: } else {
1278: Failure($client, "invalid_token\n", $userinput);
1279: }
1280: return 1;
1.178.2.1 foxr 1281:
1282: }
1283: RegisterHandler("tokenauthuserfile", \&AuthenticateUserFileAccess, 0, 1, 0);
1284: #
1285: # Unsubscribe from a resource.
1286: #
1287: # Parameters:
1288: # $cmd - The command that got us here.
1289: # $tail - Tail of the command (remaining parameters).
1290: # $client - File descriptor connected to client.
1291: # Returns
1292: # 0 - Requested to exit, caller should shut down.
1293: # 1 - Continue processing.
1294: #
1295: sub UnsubscribeHandler {
1.178.2.4 albertel 1296: my $cmd = shift;
1297: my $tail = shift;
1298: my $client = shift;
1299: my $userinput= "$cmd:$tail";
1300:
1301: my $fname = $tail;
1302: if (-e $fname) {
1303: Reply($client, &unsub($client,$fname,$clientip), $userinput);
1304: } else {
1305: Failure($client, "not_found\n", $userinput);
1306: }
1307: return 1;
1.178.2.1 foxr 1308: }
1309: RegisterHandler("unusb", \&UnsubscribeHandler, 0, 1, 0);
1310:
1311: # Subscribe to a resource.
1312: #
1313: # Parameters:
1314: # $cmd - The command that got us here.
1315: # $tail - Tail of the command (remaining parameters).
1316: # $client - File descriptor connected to client.
1317: # Returns
1318: # 0 - Requested to exit, caller should shut down.
1319: # 1 - Continue processing.
1320: #
1321: sub SubscribeHandler {
1.178.2.4 albertel 1322: my $cmd = shift;
1323: my $tail = shift;
1324: my $client = shift;
1325: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 1326:
1.178.2.4 albertel 1327: Reply( $client, &subscribe($userinput,$clientip), $userinput);
1328:
1329: return 1;
1.178.2.1 foxr 1330: }
1331: RegisterHandler("sub", \&SubscribeHandler, 0, 1, 0);
1332:
1333: #
1334: # Determine the version of a resource (?) Or is it return
1335: # the top version of the resource? Not yet clear from the
1336: # code in currentversion.
1337: #
1338: # Parameters:
1339: # $cmd - The command that got us here.
1340: # $tail - Tail of the command (remaining parameters).
1341: # $client - File descriptor connected to client.
1342: # Returns
1343: # 0 - Requested to exit, caller should shut down.
1344: # 1 - Continue processing.
1345: #
1346: sub CurrentVersionHandler {
1.178.2.4 albertel 1347: my $cmd = shift;
1348: my $tail = shift;
1349: my $client = shift;
1350: my $userinput= "$cmd:$tail";
1351:
1352: my $fname = $tail;
1353: Reply( $client, ¤tversion($fname)."\n", $userinput);
1354: return 1;
1.178.2.1 foxr 1355:
1356: }
1357: RegisterHandler("currentversion", \&CurrentVersionHandler, 0, 1, 0);
1358:
1359:
1360: # Make an entry in a user's activity log.
1361: #
1362: # Parameters:
1363: # $cmd - The command that got us here.
1364: # $tail - Tail of the command (remaining parameters).
1365: # $client - File descriptor connected to client.
1366: # Returns
1367: # 0 - Requested to exit, caller should shut down.
1368: # 1 - Continue processing.
1369: #
1370: sub ActivityLogEntryHandler {
1.178.2.4 albertel 1371: my $cmd = shift;
1372: my $tail = shift;
1373: my $client = shift;
1374: my $userinput= "$cmd:$tail";
1375:
1376: my ($udom,$uname,$what)=split(/:/,$tail);
1377: chomp($what);
1378: my $proname=propath($udom,$uname);
1379: my $now=time;
1380: my $hfh;
1381: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1382: print $hfh "$now:$clientname:$what\n";
1383: Reply( $client, "ok\n", $userinput);
1384: } else {
1.178.2.8 foxr 1385: Failure($client, "error: ".($!+0)." IO::File->new Failed "
1.178.2.4 albertel 1386: ."while attempting log\n",
1387: $userinput);
1388: }
1.178.2.1 foxr 1389:
1.178.2.4 albertel 1390: return 1;
1.178.2.1 foxr 1391: }
1392: RegisterHandler("log", \&ActivityLogEntryHandler, 0, 1, 0);
1393: #
1394: # Put a namespace entry in a user profile hash.
1395: # My druthers would be for this to be an encrypted interaction too.
1396: # anything that might be an inadvertent covert channel about either
1397: # user authentication or user personal information....
1398: #
1399: # Parameters:
1400: # $cmd - The command that got us here.
1401: # $tail - Tail of the command (remaining parameters).
1402: # $client - File descriptor connected to client.
1403: # Returns
1404: # 0 - Requested to exit, caller should shut down.
1405: # 1 - Continue processing.
1406: #
1407: sub PutUserProfileEntry {
1.178.2.4 albertel 1408: my $cmd = shift;
1409: my $tail = shift;
1410: my $client = shift;
1411: my $userinput = "$cmd:$tail";
1.178.2.10! foxr 1412:
1.178.2.4 albertel 1413: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
1414: if ($namespace ne 'roles') {
1.178.2.10! foxr 1415: chomp($what);
! 1416: my $hashref = TieUserHash($udom, $uname, $namespace,
! 1417: &GDBM_WRCREAT(),"P",$what);
! 1418: if($hashref) {
! 1419: my @pairs=split(/\&/,$what);
! 1420: foreach my $pair (@pairs) {
! 1421: my ($key,$value)=split(/=/,$pair);
! 1422: $hashref->{$key}=$value;
! 1423: }
! 1424: if (untie(%$hashref)) {
! 1425: Reply( $client, "ok\n", $userinput);
! 1426: } else {
! 1427: Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
! 1428: "while attempting put\n",
! 1429: $userinput);
! 1430: }
! 1431: } else {
! 1432: Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
! 1433: "while attempting put\n", $userinput);
! 1434: }
! 1435: } else {
1.178.2.8 foxr 1436: Failure( $client, "refused\n", $userinput);
1.178.2.10! foxr 1437: }
1.178.2.8 foxr 1438:
1.178.2.10! foxr 1439: return 1;
1.178.2.1 foxr 1440: }
1441: RegisterHandler("put", \&PutUserProfileEntry, 0, 1, 0);
1442:
1443: #
1444: # Increment a profile entry in the user history file.
1445: # The history contains keyword value pairs. In this case,
1446: # The value itself is a pair of numbers. The first, the current value
1447: # the second an increment that this function applies to the current
1448: # value.
1449: #
1450: # Parameters:
1451: # $cmd - The command that got us here.
1452: # $tail - Tail of the command (remaining parameters).
1453: # $client - File descriptor connected to client.
1454: # Returns
1455: # 0 - Requested to exit, caller should shut down.
1456: # 1 - Continue processing.
1457: #
1458: sub IncrementUserValueHandler {
1.178.2.4 albertel 1459: my $cmd = shift;
1460: my $tail = shift;
1461: my $client = shift;
1.178.2.7 foxr 1462: my $userinput = "$cmd:$tail";
1.178.2.4 albertel 1463:
1464: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
1465: if ($namespace ne 'roles') {
1.178.2.8 foxr 1466: chomp($what);
1.178.2.9 foxr 1467: my $hashref = TieUserHash($udom, $uname,
1.178.2.10! foxr 1468: $namespace, &GDBM_WRCREAT(),
! 1469: "P",$what);
1.178.2.8 foxr 1470: if ($hashref) {
1.178.2.10! foxr 1471: my @pairs=split(/\&/,$what);
! 1472: foreach my $pair (@pairs) {
! 1473: my ($key,$value)=split(/=/,$pair);
! 1474: # We could check that we have a number...
! 1475: if (! defined($value) || $value eq '') {
! 1476: $value = 1;
! 1477: }
! 1478: $hashref->{$key}+=$value;
! 1479: }
! 1480: if (untie(%$hashref)) {
! 1481: Reply( $client, "ok\n", $userinput);
! 1482: } else {
! 1483: Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
! 1484: "while attempting inc\n", $userinput);
! 1485: }
! 1486: } else {
! 1487: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
! 1488: "while attempting inc\n", $userinput);
! 1489: }
! 1490: } else {
! 1491: Failure($client, "refused\n", $userinput);
! 1492: }
1.178.2.8 foxr 1493:
1.178.2.4 albertel 1494: return 1;
1.178.2.1 foxr 1495: }
1496: RegisterHandler("inc", \&IncrementUserValueHandler, 0, 1, 0);
1497: #
1498: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
1499: # Each 'role' a user has implies a set of permissions. Adding a new role
1500: # for a person grants the permissions packaged with that role
1501: # to that user when the role is selected.
1502: #
1503: # Parameters:
1504: # $cmd - The command string (rolesput).
1505: # $tail - The remainder of the request line. For rolesput this
1506: # consists of a colon separated list that contains:
1507: # The domain and user that is granting the role (logged).
1508: # The domain and user that is getting the role.
1509: # The roles being granted as a set of & separated pairs.
1510: # each pair a key value pair.
1511: # $client - File descriptor connected to the client.
1512: # Returns:
1513: # 0 - If the daemon should exit
1514: # 1 - To continue processing.
1515: #
1516: #
1517: sub RolesPutHandler {
1.178.2.4 albertel 1518: my $cmd = shift;
1519: my $tail = shift;
1520: my $client = shift;
1521: my $userinput = "$cmd:$tail";
1522:
1523: my ($exedom,$exeuser,$udom,$uname,$what) =split(/:/,$tail);
1524: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
1525: "what = ".$what);
1526: my $namespace='roles';
1527: chomp($what);
1.178.2.9 foxr 1528: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.10! foxr 1529: &GDBM_WRCREAT(), "P",
! 1530: "$exedom:$exeuser:$what");
1.178.2.4 albertel 1531: #
1532: # Log the attempt to set a role. The {}'s here ensure that the file
1533: # handle is open for the minimal amount of time. Since the flush
1534: # is done on close this improves the chances the log will be an un-
1535: # corrupted ordered thing.
1.178.2.8 foxr 1536: if ($hashref) {
1537: my @pairs=split(/\&/,$what);
1.178.2.4 albertel 1538: foreach my $pair (@pairs) {
1539: my ($key,$value)=split(/=/,$pair);
1.178.2.8 foxr 1540: &ManagePermissions($key, $udom, $uname,
1541: &GetAuthType( $udom, $uname));
1542: $hashref->{$key}=$value;
1.178.2.4 albertel 1543: }
1.178.2.8 foxr 1544: if (untie($hashref)) {
1.178.2.4 albertel 1545: Reply($client, "ok\n", $userinput);
1546: } else {
1547: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1548: "while attempting rolesput\n", $userinput);
1549: }
1550: } else {
1551: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1552: "while attempting rolesput\n", $userinput);
1553: }
1554: return 1;
1.178.2.1 foxr 1555: }
1556: RegisterHandler("rolesput", \&RolesPutHandler, 1,1,0); # Encoded client only.
1557: #
1558: # Deletes (removes) a role for a user. This is equivalent to removing
1559: # a permissions package associated with the role from the user's profile.
1560: #
1561: # Parameters:
1562: # $cmd - The command (rolesdel)
1563: # $tail - The remainder of the request line. This consists
1564: # of:
1565: # The domain and user requesting the change (logged)
1566: # The domain and user being changed.
1567: # The roles being revoked. These are shipped to us
1568: # as a bunch of & separated role name keywords.
1569: # $client - The file handle open on the client.
1570: # Returns:
1571: # 1 - Continue processing
1572: # 0 - Exit.
1573: #
1574: sub RolesDeleteHandler {
1.178.2.4 albertel 1575: my $cmd = shift;
1576: my $tail = shift;
1577: my $client = shift;
1578: my $userinput = "$cmd:$tail";
1579:
1580: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
1581: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
1582: "what = ".$what);
1583: my $namespace='roles';
1584: chomp($what);
1.178.2.9 foxr 1585: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.10! foxr 1586: &GDBM_WRCREAT(), "D",
! 1587: "$exedom:$exeuser:$what");
! 1588:
1.178.2.8 foxr 1589: if ($hashref) {
1.178.2.10! foxr 1590: my @rolekeys=split(/\&/,$what);
! 1591:
! 1592: foreach my $key (@rolekeys) {
! 1593: delete $hashref->{$key};
! 1594: }
! 1595: if (untie(%$hashref)) {
! 1596: Reply($client, "ok\n", $userinput);
1.178.2.4 albertel 1597: } else {
1.178.2.10! foxr 1598: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
! 1599: "while attempting rolesdel\n", $userinput);
1.178.2.4 albertel 1600: }
1.178.2.10! foxr 1601: } else {
1.178.2.8 foxr 1602: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.178.2.4 albertel 1603: "while attempting rolesdel\n", $userinput);
1.178.2.10! foxr 1604: }
1.178.2.4 albertel 1605:
1606: return 1;
1.178.2.1 foxr 1607: }
1608: RegisterHandler("rolesdel", \&RolesDeleteHandler, 1,1, 0); # Encoded client only
1609:
1610: # Unencrypted get from a user's profile database. See
1611: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
1612: # This function retrieves a keyed item from a specific named database in the
1613: # user's directory.
1614: #
1615: # Parameters:
1616: # $cmd - Command request keyword (get).
1617: # $tail - Tail of the command. This is a colon separated list
1618: # consisting of the domain and username that uniquely
1619: # identifies the profile,
1620: # The 'namespace' which selects the gdbm file to
1621: # do the lookup in,
1622: # & separated list of keys to lookup. Note that
1623: # the values are returned as an & separated list too.
1624: # $client - File descriptor open on the client.
1625: # Returns:
1626: # 1 - Continue processing.
1627: # 0 - Exit.
1628: #
1629: sub GetProfileEntry {
1.178.2.4 albertel 1630: my $cmd = shift;
1631: my $tail = shift;
1632: my $client = shift;
1633: my $userinput= "$cmd:$tail";
1634:
1635: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1636: chomp($what);
1.178.2.9 foxr 1637: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.10! foxr 1638: &GDBM_READER());
1.178.2.8 foxr 1639: if ($hashref) {
1640: my @queries=split(/\&/,$what);
1641: my $qresult='';
1.178.2.10! foxr 1642:
1.178.2.4 albertel 1643: for (my $i=0;$i<=$#queries;$i++) {
1.178.2.8 foxr 1644: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1.178.2.4 albertel 1645: }
1.178.2.8 foxr 1646: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1647: if (untie(%$hashref)) {
1.178.2.4 albertel 1648: Reply($client, "$qresult\n", $userinput);
1649: } else {
1650: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1651: "while attempting get\n", $userinput);
1652: }
1653: } else {
1654: if ($!+0 == 2) { # +0 coerces errno -> number 2 is ENOENT
1655: Failure($client, "error:No such file or ".
1656: "GDBM reported bad block error\n", $userinput);
1657: } else { # Some other undifferentiated err.
1658: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1659: "while attempting get\n", $userinput);
1660: }
1661: }
1662: return 1;
1.178.2.1 foxr 1663: }
1664: RegisterHandler("get", \&GetProfileEntry, 0,1,0);
1665: #
1666: # Process the encrypted get request. Note that the request is sent
1667: # in clear, but the reply is encrypted. This is a small covert channel:
1668: # information about the sensitive keys is given to the snooper. Just not
1669: # information about the values of the sensitive key. Hmm if I wanted to
1670: # know these I'd snoop for the egets. Get the profile item names from them
1671: # and then issue a get for them since there's no enforcement of the
1672: # requirement of an encrypted get for particular profile items. If I
1673: # were re-doing this, I'd force the request to be encrypted as well as the
1674: # reply. I'd also just enforce encrypted transactions for all gets since
1675: # that would prevent any covert channel snooping.
1676: #
1677: # Parameters:
1678: # $cmd - Command keyword of request (eget).
1679: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
1680: # $client - File open on the client.
1681: # Returns:
1682: # 1 - Continue processing
1683: # 0 - server should exit.
1684: sub GetProfileEntryEncrypted {
1.178.2.4 albertel 1685: my $cmd = shift;
1686: my $tail = shift;
1687: my $client = shift;
1688: my $userinput = "$cmd:$tail";
1689:
1690: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
1691: chomp($what);
1.178.2.9 foxr 1692: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.8 foxr 1693: &GDBM_READER());
1694: if ($hashref) {
1695: my @queries=split(/\&/,$what);
1696: my $qresult='';
1.178.2.4 albertel 1697: for (my $i=0;$i<=$#queries;$i++) {
1.178.2.8 foxr 1698: $qresult.="$hashref->{$queries[$i]}&";
1.178.2.4 albertel 1699: }
1.178.2.8 foxr 1700: if (untie(%$hashref)) {
1.178.2.4 albertel 1701: $qresult=~s/\&$//;
1702: if ($cipher) {
1703: my $cmdlength=length($qresult);
1704: $qresult.=" ";
1705: my $encqresult='';
1706: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1.178.2.10! foxr 1707: $encqresult.= unpack("H16",
! 1708: $cipher->encrypt(substr($qresult,
! 1709: $encidx,
! 1710: 8)));
1.178.2.4 albertel 1711: }
1712: Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
1713: } else {
1714: Failure( $client, "error:no_key\n", $userinput);
1715: }
1716: } else {
1717: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1718: "while attempting eget\n", $userinput);
1719: }
1720: } else {
1721: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1722: "while attempting eget\n", $userinput);
1723: }
1724:
1725: return 1;
1.178.2.1 foxr 1726: }
1727: RegisterHandler("eget", \&GetProfileEncrypted, 0, 1, 0);
1728:
1729: #
1730: # Deletes a key in a user profile database.
1731: #
1732: # Parameters:
1733: # $cmd - Command keyword (del).
1734: # $tail - Command tail. IN this case a colon
1735: # separated list containing:
1736: # The domain and user that identifies uniquely
1737: # the identity of the user.
1738: # The profile namespace (name of the profile
1739: # database file).
1740: # & separated list of keywords to delete.
1741: # $client - File open on client socket.
1742: # Returns:
1743: # 1 - Continue processing
1744: # 0 - Exit server.
1745: #
1746: #
1.178.2.6 foxr 1747:
1748: sub DeleteProfileEntry {
1.178.2.4 albertel 1749: my $cmd = shift;
1750: my $tail = shift;
1751: my $client = shift;
1752: my $userinput = "cmd:$tail";
1753:
1754: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1755: chomp($what);
1.178.2.9 foxr 1756: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.8 foxr 1757: &GDBM_WRCREAT(),
1758: "D",$what);
1759: if ($hashref) {
1760: my @keys=split(/\&/,$what);
1.178.2.4 albertel 1761: foreach my $key (@keys) {
1.178.2.8 foxr 1762: delete($hashref->{$key});
1.178.2.4 albertel 1763: }
1.178.2.8 foxr 1764: if (untie(%$hashref)) {
1.178.2.4 albertel 1765: Reply($client, "ok\n", $userinput);
1766: } else {
1767: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1768: "while attempting del\n", $userinput);
1769: }
1770: } else {
1771: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1772: "while attempting del\n", $userinput);
1773: }
1774: return 1;
1.178.2.1 foxr 1775: }
1776: RegisterHandler("del", \&DeleteProfileEntry, 0, 1, 0);
1777: #
1778: # List the set of keys that are defined in a profile database file.
1779: # A successful reply from this will contain an & separated list of
1780: # the keys.
1781: # Parameters:
1782: # $cmd - Command request (keys).
1783: # $tail - Remainder of the request, a colon separated
1784: # list containing domain/user that identifies the
1785: # user being queried, and the database namespace
1786: # (database filename essentially).
1787: # $client - File open on the client.
1788: # Returns:
1789: # 1 - Continue processing.
1790: # 0 - Exit the server.
1791: #
1792: sub GetProfileKeys {
1.178.2.4 albertel 1793: my $cmd = shift;
1794: my $tail = shift;
1795: my $client = shift;
1796: my $userinput = "$cmd:$tail";
1797:
1798: my ($udom,$uname,$namespace)=split(/:/,$tail);
1799: my $qresult='';
1.178.2.9 foxr 1800: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.8 foxr 1801: &GDBM_READER());
1802: if ($hashref) {
1803: foreach my $key (keys %$hashref) {
1.178.2.4 albertel 1804: $qresult.="$key&";
1805: }
1.178.2.8 foxr 1806: if (untie(%$hashref)) {
1.178.2.4 albertel 1807: $qresult=~s/\&$//;
1808: Reply($client, "$qresult\n", $userinput);
1809: } else {
1810: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1811: "while attempting keys\n", $userinput);
1812: }
1813: } else {
1814: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1815: "while attempting keys\n", $userinput);
1816: }
1.178.2.1 foxr 1817:
1.178.2.4 albertel 1818: return 1;
1.178.2.1 foxr 1819: }
1820: RegisterHandler("keys", \&GetProfileKeys, 0, 1, 0);
1821: #
1822: # Dump the contents of a user profile database.
1823: # Note that this constitutes a very large covert channel too since
1824: # the dump will return sensitive information that is not encrypted.
1825: # The naive security assumption is that the session negotiation ensures
1826: # our client is trusted and I don't believe that's assured at present.
1827: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
1828: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
1829: #
1830: # Parameters:
1831: # $cmd - The command request keyword (currentdump).
1832: # $tail - Remainder of the request, consisting of a colon
1833: # separated list that has the domain/username and
1834: # the namespace to dump (database file).
1835: # $client - file open on the remote client.
1836: # Returns:
1837: # 1 - Continue processing.
1838: # 0 - Exit the server.
1839: #
1840: sub DumpProfileDatabase {
1.178.2.4 albertel 1841: my $cmd = shift;
1842: my $tail = shift;
1843: my $client = shift;
1844: my $userinput = "$cmd:$tail";
1845:
1846: my ($udom,$uname,$namespace) = split(/:/,$tail);
1.178.2.9 foxr 1847: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.8 foxr 1848: &GDBM_READER());
1849: if ($hashref) {
1.178.2.4 albertel 1850: # Structure of %data:
1851: # $data{$symb}->{$parameter}=$value;
1852: # $data{$symb}->{'v.'.$parameter}=$version;
1853: # since $parameter will be unescaped, we do not
1.178.2.8 foxr 1854: # have to worry about silly parameter names...
1.178.2.10! foxr 1855:
1.178.2.8 foxr 1856: my $qresult='';
1.178.2.4 albertel 1857: my %data = (); # A hash of anonymous hashes..
1.178.2.8 foxr 1858: while (my ($key,$value) = each(%$hashref)) {
1.178.2.4 albertel 1859: my ($v,$symb,$param) = split(/:/,$key);
1860: next if ($v eq 'version' || $symb eq 'keys');
1861: next if (exists($data{$symb}) &&
1862: exists($data{$symb}->{$param}) &&
1863: $data{$symb}->{'v.'.$param} > $v);
1864: $data{$symb}->{$param}=$value;
1865: $data{$symb}->{'v.'.$param}=$v;
1866: }
1.178.2.8 foxr 1867: if (untie(%$hashref)) {
1.178.2.4 albertel 1868: while (my ($symb,$param_hash) = each(%data)) {
1869: while(my ($param,$value) = each (%$param_hash)){
1870: next if ($param =~ /^v\./); # Ignore versions...
1871: #
1872: # Just dump the symb=value pairs separated by &
1873: #
1874: $qresult.=$symb.':'.$param.'='.$value.'&';
1875: }
1876: }
1877: chop($qresult);
1878: Reply($client , "$qresult\n", $userinput);
1879: } else {
1880: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1881: "while attempting currentdump\n", $userinput);
1882: }
1883: } else {
1884: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1885: "while attempting currentdump\n", $userinput);
1886: }
1.178.2.1 foxr 1887:
1.178.2.4 albertel 1888: return 1;
1.178.2.1 foxr 1889: }
1890: RegisterHandler("currentdump", \&DumpProfileDatabase, 0, 1, 0);
1891: #
1892: # Dump a profile database with an optional regular expression
1893: # to match against the keys. In this dump, no effort is made
1894: # to separate symb from version information. Presumably the
1895: # databases that are dumped by this command are of a different
1896: # structure. Need to look at this and improve the documentation of
1897: # both this and the currentdump handler.
1898: # Parameters:
1899: # $cmd - The command keyword.
1900: # $tail - All of the characters after the $cmd:
1901: # These are expected to be a colon
1902: # separated list containing:
1903: # domain/user - identifying the user.
1904: # namespace - identifying the database.
1905: # regexp - optional regular expression
1906: # that is matched against
1907: # database keywords to do
1908: # selective dumps.
1909: # $client - Channel open on the client.
1910: # Returns:
1911: # 1 - Continue processing.
1912: # Side effects:
1913: # response is written to $client.
1914: #
1915: sub DumpWithRegexp {
1.178.2.4 albertel 1916: my $cmd = shift;
1917: my $tail = shift;
1918: my $client = shift;
1919:
1920: my $userinput = "$cmd:$tail";
1921:
1922: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
1923: if (defined($regexp)) {
1924: $regexp=&unescape($regexp);
1925: } else {
1926: $regexp='.';
1927: }
1.178.2.9 foxr 1928: my $hashref =TieUserHash($udom, $uname, $namespace,
1.178.2.8 foxr 1929: &GDBM_READER());
1930: if ($hashref) {
1931: my $qresult='';
1932: while (my ($key,$value) = each(%$hashref)) {
1.178.2.4 albertel 1933: if ($regexp eq '.') {
1934: $qresult.=$key.'='.$value.'&';
1935: } else {
1936: my $unescapeKey = &unescape($key);
1937: if (eval('$unescapeKey=~/$regexp/')) {
1938: $qresult.="$key=$value&";
1939: }
1940: }
1941: }
1.178.2.8 foxr 1942: if (untie(%$hashref)) {
1.178.2.4 albertel 1943: chop($qresult);
1944: Reply($client, "$qresult\n", $userinput);
1945: } else {
1946: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1947: "while attempting dump\n", $userinput);
1948: }
1949: } else {
1950: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1951: "while attempting dump\n", $userinput);
1952: }
1.178.2.1 foxr 1953:
1954: return 1;
1955: }
1956: RegisterHandler("dump", \&DumpWithRegexp, 0, 1, 0);
1957:
1958: # Store an aitem in any database but the roles database.
1959: #
1960: # Parameters:
1961: # $cmd - Request command keyword.
1962: # $tail - Tail of the request. This is a colon
1963: # separated list containing:
1964: # domain/user - User and authentication domain.
1965: # namespace - Name of the database being modified
1966: # rid - Resource keyword to modify.
1967: # what - new value associated with rid.
1968: #
1969: # $client - Socket open on the client.
1970: #
1971: #
1972: # Returns:
1973: # 1 (keep on processing).
1974: # Side-Effects:
1975: # Writes to the client
1976: sub StoreHandler {
1.178.2.4 albertel 1977: my $cmd = shift;
1978: my $tail = shift;
1979: my $client = shift;
1.178.2.1 foxr 1980:
1.178.2.4 albertel 1981: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 1982:
1.178.2.4 albertel 1983: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
1984: if ($namespace ne 'roles') {
1.178.2.8 foxr 1985:
1.178.2.4 albertel 1986: chomp($what);
1987: my @pairs=split(/\&/,$what);
1.178.2.9 foxr 1988: my $hashref = TieUserHash($udom, $uname, $namespace,
1.178.2.8 foxr 1989: &GDBM_WRCREAT(), "P",
1990: "$rid:$what");
1991: if ($hashref) {
1992: my $now = time;
1993: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
1.178.2.4 albertel 1994: my $key;
1.178.2.8 foxr 1995: $hashref->{"version:$rid"}++;
1996: my $version=$hashref->{"version:$rid"};
1.178.2.4 albertel 1997: my $allkeys='';
1998: foreach my $pair (@pairs) {
1999: my ($key,$value)=split(/=/,$pair);
2000: $allkeys.=$key.':';
1.178.2.8 foxr 2001: $hashref->{"$version:$rid:$key"}=$value;
1.178.2.4 albertel 2002: }
1.178.2.8 foxr 2003: $hashref->{"$version:$rid:timestamp"}=$now;
1.178.2.4 albertel 2004: $allkeys.='timestamp';
1.178.2.8 foxr 2005: $hashref->{"$version:keys:$rid"}=$allkeys;
2006: if (untie($hashref)) {
1.178.2.4 albertel 2007: Reply($client, "ok\n", $userinput);
2008: } else {
2009: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2010: "while attempting store\n", $userinput);
2011: }
2012: } else {
2013: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2014: "while attempting store\n", $userinput);
2015: }
2016: } else {
2017: Failure($client, "refused\n", $userinput);
1.178.2.1 foxr 2018: }
2019:
1.178.2.4 albertel 2020: return 1;
1.178.2.1 foxr 2021: }
2022: RegisterHandler("store", \&StoreHandler, 0, 1, 0);
2023: #
2024: # Restore a prior version of a resource.
2025: #
2026: # Parameters:
2027: # $cmd - Command keyword.
2028: # $tail - Remainder of the request which consists of:
2029: # domain/user - User and auth. domain.
2030: # namespace - name of resource database.
2031: # rid - Resource id.
2032: # $client - socket open on the client.
2033: #
2034: # Returns:
2035: # 1 indicating the caller should not yet exit.
2036: # Side-effects:
2037: # Writes a reply to the client.
2038: #
2039: sub RestoreHandler {
1.178.2.4 albertel 2040: my $cmd = shift;
2041: my $tail = shift;
2042: my $client = shift;
2043:
2044: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
2045:
2046: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
2047: $namespace=~s/\//\_/g;
2048: $namespace=~s/\W//g;
2049: chomp($rid);
2050: my $proname=propath($udom,$uname);
2051: my $qresult='';
2052: my %hash;
2053: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2054: &GDBM_READER(),0640)) {
2055: my $version=$hash{"version:$rid"};
2056: $qresult.="version=$version&";
2057: my $scope;
2058: for ($scope=1;$scope<=$version;$scope++) {
2059: my $vkeys=$hash{"$scope:keys:$rid"};
2060: my @keys=split(/:/,$vkeys);
2061: my $key;
2062: $qresult.="$scope:keys=$vkeys&";
2063: foreach $key (@keys) {
2064: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2065: }
2066: }
2067: if (untie(%hash)) {
2068: $qresult=~s/\&$//;
2069: Reply( $client, "$qresult\n", $userinput);
2070: } else {
2071: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2072: "while attempting restore\n", $userinput);
2073: }
2074: } else {
2075: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2076: "while attempting restore\n", $userinput);
2077: }
1.178.2.1 foxr 2078:
1.178.2.4 albertel 2079: return 1;
1.178.2.1 foxr 2080:
2081:
2082: }
1.178.2.6 foxr 2083: RegisterHandler("restore", \&RestoreHandler, 0,1,0);
1.178.2.1 foxr 2084:
2085: #
2086: # Add a chat message to to a discussion board.
2087: #
2088: # Parameters:
2089: # $cmd - Request keyword.
2090: # $tail - Tail of the command. A colon separated list
2091: # containing:
2092: # cdom - Domain on which the chat board lives
2093: # cnum - Identifier of the discussion group.
2094: # post - Body of the posting.
2095: # $client - Socket open on the client.
2096: # Returns:
2097: # 1 - Indicating caller should keep on processing.
2098: #
2099: # Side-effects:
2100: # writes a reply to the client.
2101: #
2102: #
2103: sub SendChatHandler {
1.178.2.4 albertel 2104: my $cmd = shift;
2105: my $tail = shift;
2106: my $client = shift;
2107:
2108: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 2109:
1.178.2.4 albertel 2110: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2111: &chatadd($cdom,$cnum,$newpost);
2112: Reply($client, "ok\n", $userinput);
1.178.2.1 foxr 2113:
1.178.2.4 albertel 2114: return 1;
1.178.2.1 foxr 2115: }
2116: RegisterHandler("chatsend", \&SendChatHandler, 0, 1, 0);
2117: #
2118: # Retrieve the set of chat messagss from a discussion board.
2119: #
2120: # Parameters:
2121: # $cmd - Command keyword that initiated the request.
2122: # $tail - Remainder of the request after the command
2123: # keyword. In this case a colon separated list of
2124: # chat domain - Which discussion board.
2125: # chat id - Discussion thread(?)
2126: # domain/user - Authentication domain and username
2127: # of the requesting person.
2128: # $client - Socket open on the client program.
2129: # Returns:
2130: # 1 - continue processing
2131: # Side effects:
2132: # Response is written to the client.
2133: #
2134: sub RetrieveChatHandler {
1.178.2.4 albertel 2135: my $cmd = shift;
2136: my $tail = shift;
2137: my $client = shift;
2138:
2139: my $userinput = "$cmd:$tail";
2140:
2141: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
2142: my $reply='';
2143: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2144: $reply.=&escape($_).':';
2145: }
2146: $reply=~s/\:$//;
2147: Reply($client, $reply."\n", $userinput);
1.178.2.1 foxr 2148:
2149:
1.178.2.4 albertel 2150: return 1;
1.178.2.1 foxr 2151: }
2152: RegisterHandler("chatretr", \&RetrieveChatHandler, 0, 1, 0);
2153: #
2154: # Initiate a query of an sql database. SQL query repsonses get put in
2155: # a file for later retrieval. This prevents sql query results from
2156: # bottlenecking the system. Note that with loncnew, perhaps this is
2157: # less of an issue since multiple outstanding requests can be concurrently
2158: # serviced.
2159: #
2160: # Parameters:
2161: # $cmd - COmmand keyword that initiated the request.
2162: # $tail - Remainder of the command after the keyword.
2163: # For this function, this consists of a query and
2164: # 3 arguments that are self-documentingly labelled
2165: # in the original arg1, arg2, arg3.
2166: # $client - Socket open on the client.
2167: # Return:
2168: # 1 - Indicating processing should continue.
2169: # Side-effects:
2170: # a reply is written to $client.
2171: #
2172: sub SendQueryHandler {
1.178.2.4 albertel 2173: my $cmd = shift;
2174: my $tail = shift;
2175: my $client = shift;
2176:
2177: my $userinput = "$cmd:$tail";
2178:
2179: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
2180: $query=~s/\n*$//g;
2181: Reply($client, "". sqlreply("$clientname\&$query".
2182: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
2183: $userinput);
2184:
2185: return 1;
1.178.2.1 foxr 2186: }
2187: RegisterHandler("querysend", \&SendQueryHandler, 0, 1, 0);
2188:
2189: #
2190: # Add a reply to an sql query. SQL queries are done asyncrhonously.
2191: # The query is submitted via a "querysend" transaction.
2192: # There it is passed on to the lonsql daemon, queued and issued to
2193: # mysql.
2194: # This transaction is invoked when the sql transaction is complete
2195: # it stores the query results in flie and indicates query completion.
2196: # presumably local software then fetches this response... I'm guessing
2197: # the sequence is: lonc does a querysend, we ask lonsql to do it.
2198: # lonsql on completion of the query interacts with the lond of our
2199: # client to do a query reply storing two files:
2200: # - id - The results of the query.
2201: # - id.end - Indicating the transaction completed.
2202: # NOTE: id is a unique id assigned to the query and querysend time.
2203: # Parameters:
2204: # $cmd - Command keyword that initiated this request.
2205: # $tail - Remainder of the tail. In this case that's a colon
2206: # separated list containing the query Id and the
2207: # results of the query.
2208: # $client - Socket open on the client.
2209: # Return:
2210: # 1 - Indicating that we should continue processing.
2211: # Side effects:
2212: # ok written to the client.
2213: #
2214: sub ReplyQueryHandler {
1.178.2.4 albertel 2215: my $cmd = shift;
2216: my $tail = shift;
2217: my $client = shift;
2218:
2219: my $userinput = "$cmd:$tail";
2220:
2221: my ($cmd,$id,$reply)=split(/:/,$userinput);
2222: my $store;
2223: my $execdir=$perlvar{'lonDaemons'};
2224: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2225: $reply=~s/\&/\n/g;
2226: print $store $reply;
2227: close $store;
2228: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2229: print $store2 "done\n";
2230: close $store2;
2231: Reply($client, "ok\n", $userinput);
2232: } else {
2233: Failure($client, "error: ".($!+0)
2234: ." IO::File->new Failed ".
2235: "while attempting queryreply\n", $userinput);
2236: }
1.178.2.1 foxr 2237:
2238:
1.178.2.4 albertel 2239: return 1;
1.178.2.1 foxr 2240: }
2241: RegisterHandler("queryreply", \&ReplyQueryHandler, 0, 1, 0);
2242: #
2243: # Process the courseidput query. Not quite sure what this means
2244: # at the system level sense. It appears a gdbm file in the
2245: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
2246: # a set of entries made in that database.
2247: #
2248: # Parameters:
2249: # $cmd - The command keyword that initiated this request.
2250: # $tail - Tail of the command. In this case consists of a colon
2251: # separated list contaning the domain to apply this to and
2252: # an ampersand separated list of keyword=value pairs.
2253: # $client - Socket open on the client.
2254: # Returns:
2255: # 1 - indicating that processing should continue
2256: #
2257: # Side effects:
2258: # reply is written to the client.
2259: #
2260: sub PutCourseIdHandler {
1.178.2.4 albertel 2261: my $cmd = shift;
2262: my $tail = shift;
2263: my $client = shift;
1.178.2.1 foxr 2264:
1.178.2.4 albertel 2265: my $userinput = "$cmd:$tail";
2266:
1.178.2.10! foxr 2267: my ($udom, $what) = split(/:/, $tail);
1.178.2.4 albertel 2268: chomp($what);
2269: my $now=time;
2270: my @pairs=split(/\&/,$what);
1.178.2.9 foxr 2271:
2272: my $hashref = TieDomainHash($udom, "nohist_courseids", &GDBM_WRCREAT());
2273: if ($hashref) {
1.178.2.4 albertel 2274: foreach my $pair (@pairs) {
2275: my ($key,$value)=split(/=/,$pair);
1.178.2.9 foxr 2276: $hashref->{$key}=$value.':'.$now;
1.178.2.4 albertel 2277: }
1.178.2.9 foxr 2278: if (untie(%$hashref)) {
1.178.2.4 albertel 2279: Reply($client, "ok\n", $userinput);
2280: } else {
2281: Failure( $client, "error: ".($!+0)
2282: ." untie(GDBM) Failed ".
2283: "while attempting courseidput\n", $userinput);
2284: }
2285: } else {
2286: Failure( $client, "error: ".($!+0)
2287: ." tie(GDBM) Failed ".
2288: "while attempting courseidput\n", $userinput);
2289: }
2290:
2291: return 1;
1.178.2.1 foxr 2292: }
2293: RegisterHandler("courseidput", \&PutCourseIdHandler, 0, 1, 0);
2294:
2295: # Retrieves the value of a course id resource keyword pattern
2296: # defined since a starting date. Both the starting date and the
2297: # keyword pattern are optional. If the starting date is not supplied it
2298: # is treated as the beginning of time. If the pattern is not found,
2299: # it is treatred as "." matching everything.
2300: #
2301: # Parameters:
2302: # $cmd - Command keyword that resulted in us being dispatched.
2303: # $tail - The remainder of the command that, in this case, consists
2304: # of a colon separated list of:
2305: # domain - The domain in which the course database is
2306: # defined.
2307: # since - Optional parameter describing the minimum
2308: # time of definition(?) of the resources that
2309: # will match the dump.
2310: # description - regular expression that is used to filter
2311: # the dump. Only keywords matching this regexp
2312: # will be used.
2313: # $client - The socket open on the client.
2314: # Returns:
2315: # 1 - Continue processing.
2316: # Side Effects:
2317: # a reply is written to $client.
2318: sub DumpCourseIdHandler {
1.178.2.4 albertel 2319: my $cmd = shift;
2320: my $tail = shift;
2321: my $client = shift;
2322:
2323: my $userinput = "$cmd:$tail";
2324:
2325: my ($udom,$since,$description) =split(/:/,$tail);
2326: if (defined($description)) {
2327: $description=&unescape($description);
2328: } else {
2329: $description='.';
2330: }
2331: unless (defined($since)) { $since=0; }
2332: my $qresult='';
1.178.2.9 foxr 2333:
2334: my $hashref = TieDomainHash($udom, "nohist_courseids", &GDBM_WRCREAT());
2335: if ($hashref) {
2336: while (my ($key,$value) = each(%$hashref)) {
1.178.2.4 albertel 2337: my ($descr,$lasttime)=split(/\:/,$value);
2338: if ($lasttime<$since) {
2339: next;
2340: }
2341: if ($description eq '.') {
2342: $qresult.=$key.'='.$descr.'&';
2343: } else {
2344: my $unescapeVal = &unescape($descr);
2345: if (eval('$unescapeVal=~/$description/i')) {
2346: $qresult.="$key=$descr&";
2347: }
2348: }
2349: }
1.178.2.9 foxr 2350: if (untie(%$hashref)) {
1.178.2.4 albertel 2351: chop($qresult);
2352: Reply($client, "$qresult\n", $userinput);
2353: } else {
2354: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2355: "while attempting courseiddump\n", $userinput);
2356: }
2357: } else {
2358: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2359: "while attempting courseiddump\n", $userinput);
2360: }
1.178.2.1 foxr 2361:
2362:
1.178.2.4 albertel 2363: return 1;
1.178.2.1 foxr 2364: }
2365: RegisterHandler("courseiddump", \&DumpCourseIdHandler, 0, 1, 0);
2366: #
2367: # Puts an id to a domains id database.
2368: #
2369: # Parameters:
2370: # $cmd - The command that triggered us.
2371: # $tail - Remainder of the request other than the command. This is a
2372: # colon separated list containing:
2373: # $domain - The domain for which we are writing the id.
2374: # $pairs - The id info to write... this is and & separated list
2375: # of keyword=value.
2376: # $client - Socket open on the client.
2377: # Returns:
2378: # 1 - Continue processing.
2379: # Side effects:
2380: # reply is written to $client.
2381: #
2382: sub PutIdHandler {
1.178.2.4 albertel 2383: my $cmd = shift;
2384: my $tail = shift;
2385: my $client = shift;
2386:
2387: my $userinput = "$cmd:$tail";
2388:
2389: my ($udom,$what)=split(/:/,$tail);
2390: chomp($what);
2391: my @pairs=split(/\&/,$what);
1.178.2.9 foxr 2392: my $hashref = TieDomainHash($udom, "ids", &GDBM_WRCREAT(),
2393: "P", $what);
2394: if ($hashref) {
1.178.2.4 albertel 2395: foreach my $pair (@pairs) {
2396: my ($key,$value)=split(/=/,$pair);
1.178.2.9 foxr 2397: $hashref->{$key}=$value;
1.178.2.4 albertel 2398: }
1.178.2.9 foxr 2399: if (untie(%$hashref)) {
1.178.2.4 albertel 2400: Reply($client, "ok\n", $userinput);
2401: } else {
2402: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2403: "while attempting idput\n", $userinput);
2404: }
2405: } else {
2406: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2407: "while attempting idput\n", $userinput);
1.178.2.1 foxr 2408: }
2409:
1.178.2.4 albertel 2410: return 1;
1.178.2.1 foxr 2411: }
2412:
2413: RegisterHandler("idput", \&PutIdHandler, 0, 1, 0);
2414: #
2415: # Retrieves a set of id values from the id database.
2416: # Returns an & separated list of results, one for each requested id to the
2417: # client.
2418: #
2419: # Parameters:
2420: # $cmd - Command keyword that caused us to be dispatched.
2421: # $tail - Tail of the command. Consists of a colon separated:
2422: # domain - the domain whose id table we dump
2423: # ids Consists of an & separated list of
2424: # id keywords whose values will be fetched.
2425: # nonexisting keywords will have an empty value.
2426: # $client - Socket open on the client.
2427: #
2428: # Returns:
2429: # 1 - indicating processing should continue.
2430: # Side effects:
2431: # An & separated list of results is written to $client.
2432: #
2433: sub GetIdHandler {
1.178.2.4 albertel 2434: my $cmd = shift;
2435: my $tail = shift;
2436: my $client = shift;
1.178.2.10! foxr 2437:
1.178.2.4 albertel 2438: my $userinput = "$client:$tail";
1.178.2.10! foxr 2439:
1.178.2.4 albertel 2440: my ($udom,$what)=split(/:/,$tail);
2441: chomp($what);
2442: my @queries=split(/\&/,$what);
2443: my $qresult='';
1.178.2.9 foxr 2444: my $hashref = TieDomainHash($udom, "ids", &GDBM_READER());
2445: if ($hashref) {
1.178.2.4 albertel 2446: for (my $i=0;$i<=$#queries;$i++) {
1.178.2.9 foxr 2447: $qresult.="$hashref->{$queries[$i]}&";
1.178.2.4 albertel 2448: }
1.178.2.9 foxr 2449: if (untie(%$hashref)) {
1.178.2.4 albertel 2450: $qresult=~s/\&$//;
2451: Reply($client, "$qresult\n", $userinput);
2452: } else {
2453: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2454: "while attempting idget\n",$userinput);
2455: }
2456: } else {
2457: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2458: "while attempting idget\n",$userinput);
2459: }
1.178.2.10! foxr 2460:
1.178.2.4 albertel 2461: return 1;
1.178.2.1 foxr 2462: }
1.178.2.3 foxr 2463:
1.178.2.1 foxr 2464: RegisterHandler("idget", \&GetIdHandler, 0, 1, 0);
1.178.2.3 foxr 2465: #
2466: # Process the tmpput command I'm not sure what this does.. Seems to
2467: # create a file in the lonDaemons/tmp directory of the form $id.tmp
2468: # where Id is the client's ip concatenated with a sequence number.
2469: # The file will contain some value that is passed in. Is this e.g.
2470: # a login token?
2471: #
2472: # Parameters:
2473: # $cmd - The command that got us dispatched.
2474: # $tail - The remainder of the request following $cmd:
2475: # In this case this will be the contents of the file.
2476: # $client - Socket connected to the client.
2477: # Returns:
2478: # 1 indicating processing can continue.
2479: # Side effects:
2480: # A file is created in the local filesystem.
2481: # A reply is sent to the client.
2482: sub TmpPutHandler {
1.178.2.4 albertel 2483: my $cmd = shift;
2484: my $what = shift;
2485: my $client = shift;
2486:
2487: my $userinput = "$cmd:$what"; # Reconstruct for logging.
2488:
2489:
2490: my $store;
2491: $tmpsnum++;
2492: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2493: $id=~s/\W/\_/g;
2494: $what=~s/\n//g;
2495: my $execdir=$perlvar{'lonDaemons'};
2496: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2497: print $store $what;
2498: close $store;
2499: Reply($client, "$id\n", $userinput);
2500: } else {
2501: Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
2502: "while attempting tmpput\n", $userinput);
2503: }
2504: return 1;
1.178.2.3 foxr 2505:
2506: }
2507: RegisterHandler("tmpput", \&TmpPutHandler, 0, 1, 0);
2508:
2509: # Processes the tmpget command. This command returns the contents
2510: # of a temporary resource file(?) created via tmpput.
2511: #
2512: # Paramters:
2513: # $cmd - Command that got us dispatched.
2514: # $id - Tail of the command, contain the id of the resource
2515: # we want to fetch.
2516: # $client - socket open on the client.
2517: # Return:
2518: # 1 - Inidcating processing can continue.
2519: # Side effects:
2520: # A reply is sent to the client.
2521:
2522: #
2523: sub TmpGetHandler {
1.178.2.4 albertel 2524: my $cmd = shift;
2525: my $id = shift;
2526: my $client = shift;
2527: my $userinput = "$cmd:$id";
1.178.2.10! foxr 2528:
1.178.2.4 albertel 2529: chomp($id);
2530: $id=~s/\W/\_/g;
2531: my $store;
2532: my $execdir=$perlvar{'lonDaemons'};
2533: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2534: my $reply=<$store>;
2535: Reply( $client, "$reply\n", $userinput);
2536: close $store;
2537: } else {
2538: Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
2539: "while attempting tmpget\n", $userinput);
2540: }
1.178.2.3 foxr 2541:
1.178.2.4 albertel 2542: return 1;
1.178.2.3 foxr 2543: }
2544: RegisterHandler("tmpget", \&TmpGetHandler, 0, 1, 0);
2545: #
2546: # Process the tmpdel command. This command deletes a temp resource
2547: # created by the tmpput command.
2548: #
2549: # Parameters:
2550: # $cmd - Command that got us here.
2551: # $id - Id of the temporary resource created.
2552: # $client - socket open on the client process.
2553: #
2554: # Returns:
2555: # 1 - Indicating processing should continue.
2556: # Side Effects:
2557: # A file is deleted
2558: # A reply is sent to the client.
2559: sub TmpDelHandler {
1.178.2.4 albertel 2560: my $cmd = shift;
2561: my $id = shift;
2562: my $client = shift;
1.178.2.10! foxr 2563:
1.178.2.4 albertel 2564: my $userinput= "$cmd:$id";
1.178.2.10! foxr 2565:
1.178.2.4 albertel 2566: chomp($id);
2567: $id=~s/\W/\_/g;
2568: my $execdir=$perlvar{'lonDaemons'};
2569: if (unlink("$execdir/tmp/$id.tmp")) {
2570: Reply($client, "ok\n", $userinput);
2571: } else {
2572: Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
2573: "while attempting tmpdel\n", $userinput);
2574: }
1.178.2.10! foxr 2575:
1.178.2.4 albertel 2576: return 1;
1.178.2.3 foxr 2577:
2578: }
2579: RegisterHandler("tmpdel", \&TmpDelHandler, 0, 1, 0);
2580: #
2581: # ls - list the contents of a directory. For each file in the
2582: # selected directory the filename followed by the full output of
2583: # the stat function is returned. The returned info for each
2584: # file are separated by ':'. The stat fields are separated by &'s.
2585: # Parameters:
2586: # $cmd - The command that dispatched us (ls).
2587: # $ulsdir - The directory path to list... I'm not sure what this
2588: # is relative as things like ls:. return e.g.
2589: # no_such_dir.
2590: # $client - Socket open on the client.
2591: # Returns:
2592: # 1 - indicating that the daemon should not disconnect.
2593: # Side Effects:
2594: # The reply is written to $client.
2595: #
2596: sub LsHandler {
1.178.2.4 albertel 2597: my $cmd = shift;
2598: my $ulsdir = shift;
2599: my $client = shift;
1.178.2.3 foxr 2600:
1.178.2.4 albertel 2601: my $userinput = "$cmd:$ulsdir";
1.178.2.3 foxr 2602:
1.178.2.4 albertel 2603: my $ulsout='';
2604: my $ulsfn;
2605: if (-e $ulsdir) {
2606: if(-d $ulsdir) {
2607: if (opendir(LSDIR,$ulsdir)) {
2608: while ($ulsfn=readdir(LSDIR)) {
2609: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2610: $ulsout.=$ulsfn.'&'.
2611: join('&',@ulsstats).':';
2612: }
2613: closedir(LSDIR);
2614: }
2615: } else {
2616: my @ulsstats=stat($ulsdir);
2617: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2618: }
2619: } else {
2620: $ulsout='no_such_dir';
2621: }
2622: if ($ulsout eq '') { $ulsout='empty'; }
2623: Reply($client, "$ulsout\n", $userinput);
2624:
2625:
2626: return 1;
1.178.2.3 foxr 2627: }
2628: RegisterHandler("ls", \&LsHandler, 0, 1, 0);
2629:
2630:
2631: #
2632: # Processes the setannounce command. This command
2633: # creates a file named announce.txt in the top directory of
2634: # the documentn root and sets its contents. The announce.txt file is
2635: # printed in its entirety at the LonCAPA login page. Note:
2636: # once the announcement.txt fileis created it cannot be deleted.
2637: # However, setting the contents of the file to empty removes the
2638: # announcement from the login page of loncapa so who cares.
2639: #
2640: # Parameters:
2641: # $cmd - The command that got us dispatched.
2642: # $announcement - The text of the announcement.
2643: # $client - Socket open on the client process.
2644: # Retunrns:
2645: # 1 - Indicating request processing should continue
2646: # Side Effects:
2647: # The file {DocRoot}/announcement.txt is created.
2648: # A reply is sent to $client.
2649: #
2650: sub SetAnnounceHandler {
1.178.2.4 albertel 2651: my $cmd = shift;
2652: my $announcement = shift;
2653: my $client = shift;
1.178.2.3 foxr 2654:
1.178.2.4 albertel 2655: my $userinput = "$cmd:$announcement";
1.178.2.3 foxr 2656:
1.178.2.4 albertel 2657: chomp($announcement);
2658: $announcement=&unescape($announcement);
2659: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2660: '/announcement.txt')) {
2661: print $store $announcement;
2662: close $store;
2663: Reply($client, "ok\n", $userinput);
2664: } else {
2665: Failure($client, "error: ".($!+0)."\n", $userinput);
2666: }
1.178.2.3 foxr 2667:
1.178.2.4 albertel 2668: return 1;
1.178.2.3 foxr 2669: }
2670: RegisterHandler("setannounce", \&SetAnnounceHandler, 0, 1, 0);
2671:
2672: #
2673: # Return the version of the daemon. This can be used to determine
2674: # the compatibility of cross version installations or, alternatively to
2675: # simply know who's out of date and who isn't. Note that the version
2676: # is returned concatenated with the tail.
2677: # Parameters:
2678: # $cmd - the request that dispatched to us.
2679: # $tail - Tail of the request (client's version?).
2680: # $client - Socket open on the client.
2681: #Returns:
2682: # 1 - continue processing requests.
2683: # Side Effects:
2684: # Replies with version to $client.
2685: sub GetVersionHandler {
1.178.2.4 albertel 2686: my $client = shift;
2687: my $tail = shift;
2688: my $client = shift;
2689: my $userinput = $client;
2690:
2691: Reply($client, &version($userinput)."\n", $userinput);
1.178.2.3 foxr 2692:
2693:
1.178.2.4 albertel 2694: return 1;
1.178.2.3 foxr 2695: }
2696: RegisterHandler("version", \&GetVersionHandler, 0, 1, 0);
2697:
2698: # Set the current host and domain. This is used to support
2699: # multihomed systems. Each IP of the system, or even separate daemons
2700: # on the same IP can be treated as handling a separate lonCAPA virtual
2701: # machine. This command selects the virtual lonCAPA. The client always
2702: # knows the right one since it is lonc and it is selecting the domain/system
2703: # from the hosts.tab file.
2704: # Parameters:
2705: # $cmd - Command that dispatched us.
2706: # $tail - Tail of the command (domain/host requested).
2707: # $socket - Socket open on the client.
2708: #
2709: # Returns:
2710: # 1 - Indicates the program should continue to process requests.
2711: # Side-effects:
2712: # The default domain/system context is modified for this daemon.
2713: # a reply is sent to the client.
2714: #
2715: sub SelectHostHandler {
1.178.2.4 albertel 2716: my $cmd = shift;
2717: my $tail = shift;
2718: my $socket = shift;
1.178.2.3 foxr 2719:
1.178.2.4 albertel 2720: my $userinput ="$cmd:$tail";
1.178.2.3 foxr 2721:
1.178.2.4 albertel 2722: Reply($client, &sethost($userinput)."\n", $userinput);
1.178.2.3 foxr 2723:
2724:
1.178.2.4 albertel 2725: return 1;
1.178.2.3 foxr 2726: }
2727: RegisterHandler("sethost", \&SelectHostHandler, 0, 1, 0);
2728:
2729: # Process a request to exit:
2730: # - "bye" is sent to the client.
2731: # - The client socket is shutdown and closed.
2732: # - We indicate to the caller that we should exit.
2733: # Formal Parameters:
2734: # $cmd - The command that got us here.
2735: # $tail - Tail of the command (empty).
2736: # $client - Socket open on the tail.
2737: # Returns:
2738: # 0 - Indicating the program should exit!!
2739: #
2740: sub ExitHandler {
1.178.2.4 albertel 2741: my $cmd = shift;
2742: my $tail = shift;
2743: my $client = shift;
2744:
2745: my $userinput = "$cmd:$tail";
2746:
2747: &logthis("Client $clientip ($clientname) hanging up: $userinput");
2748: Reply($client, "bye\n", $userinput);
2749: $client->shutdown(2); # shutdown the socket forcibly.
2750: $client->close();
1.178.2.3 foxr 2751:
1.178.2.4 albertel 2752: return 0;
1.178.2.3 foxr 2753: }
2754: RegisterHandler("exit", \&ExitHandler, 0, 1,1);
2755: RegisterHandler("init", \&ExitHandler, 0, 1,1); # RE-init is like exit.
2756: RegisterHandler("quit", \&ExitHandler, 0, 1,1); # I like this too!
1.178.2.1 foxr 2757: #------------------------------------------------------------------------------------
2758: #
2759: # Process a Request. Takes a request from the client validates
2760: # it and performs the operation requested by it. Returns
2761: # a response to the client.
2762: #
2763: # Parameters:
2764: # request - A string containing the user's request.
2765: # Returns:
2766: # 0 - Requested to exit, caller should shut down.
2767: # 1 - Accept additional requests from the client.
2768: #
2769: sub ProcessRequest {
1.178.2.4 albertel 2770: my $Request = shift;
2771: my $KeepGoing = 1; # Assume we're not asked to stop.
1.178.2.1 foxr 2772:
1.178.2.4 albertel 2773: my $wasenc=0;
2774: my $userinput = $Request; # for compatibility with oldcode <yeach>
1.178.2.1 foxr 2775:
2776:
2777: # ------------------------------------------------------------ See if encrypted
2778:
1.178.2.4 albertel 2779: if($userinput =~ /^enc/) {
2780: $wasenc = 1;
2781: $userinput = Decipher($userinput);
2782: if(! $userinput) {
2783: Failure($client,"error:Encrypted data without negotiating key");
2784: return 0; # Break off with this imposter.
2785: }
2786: }
2787: # Split off the request keyword from the rest of the stuff.
1.178.2.1 foxr 2788:
1.178.2.4 albertel 2789: my ($command, $tail) = split(/:/, $userinput, 2);
1.178.2.2 foxr 2790:
1.178.2.4 albertel 2791: Debug("Command received: $command, encoded = $wasenc");
1.178.2.2 foxr 2792:
1.178.2.1 foxr 2793:
2794: # ------------------------------------------------------------- Normal commands
2795:
1.178.2.4 albertel 2796: #
2797: # If the command is in the hash, then execute it via the hash dispatch:
2798: #
2799: if(defined $Dispatcher{$command}) {
2800:
2801: my $DispatchInfo = $Dispatcher{$command};
2802: my $Handler = $$DispatchInfo[0];
2803: my $NeedEncode = $$DispatchInfo[1];
2804: my $ClientTypes = $$DispatchInfo[2];
2805: Debug("Matched dispatch hash: mustencode: $NeedEncode ClientType $ClientTypes");
1.178.2.1 foxr 2806:
1.178.2.4 albertel 2807: # Validate the request:
1.178.2.1 foxr 2808:
1.178.2.4 albertel 2809: my $ok = 1;
2810: my $requesterprivs = 0;
2811: if(isClient()) {
2812: $requesterprivs |= $CLIENT_OK;
2813: }
2814: if(isManager()) {
2815: $requesterprivs |= $MANAGER_OK;
2816: }
2817: if($NeedEncode && (!$wasenc)) {
2818: Debug("Must encode but wasn't: $NeedEncode $wasenc");
2819: $ok = 0;
2820: }
2821: if(($ClientTypes & $requesterprivs) == 0) {
2822: Debug("Client not privileged to do this operation");
2823: $ok = 0;
2824: }
2825:
2826: if($ok) {
2827: Debug("Dispatching to handler $command $tail");
2828: $KeepGoing = &$Handler($command, $tail, $client);
2829: } else {
2830: Debug("Refusing to dispatch because ok is false");
2831: Failure($client, "refused", $userinput);
2832: }
1.161 foxr 2833:
2834:
1.178.2.1 foxr 2835: # ------------------------------------------------------------- unknown command
1.97 foxr 2836:
1.178.2.4 albertel 2837: } else {
1.178.2.1 foxr 2838: # unknown command
1.178.2.4 albertel 2839: Failure($client, "unknown_cmd\n", $userinput);
2840: }
1.97 foxr 2841:
1.178.2.1 foxr 2842: return $KeepGoing;
2843: }
1.97 foxr 2844:
1.96 foxr 2845:
2846: #
1.140 foxr 2847: # GetCertificate: Given a transaction that requires a certificate,
2848: # this function will extract the certificate from the transaction
2849: # request. Note that at this point, the only concept of a certificate
2850: # is the hostname to which we are connected.
2851: #
2852: # Parameter:
2853: # request - The request sent by our client (this parameterization may
2854: # need to change when we really use a certificate granting
2855: # authority.
2856: #
2857: sub GetCertificate {
2858: my $request = shift;
2859:
2860: return $clientip;
2861: }
1.161 foxr 2862:
2863:
2864:
1.156 foxr 2865: #
2866: # ReadManagerTable: Reads in the current manager table. For now this is
2867: # done on each manager authentication because:
2868: # - These authentications are not frequent
2869: # - This allows dynamic changes to the manager table
2870: # without the need to signal to the lond.
2871: #
2872:
2873: sub ReadManagerTable {
2874:
2875: # Clean out the old table first..
2876:
1.178.2.4 albertel 2877: foreach my $key (keys %managers) {
2878: delete $managers{$key};
2879: }
2880:
2881: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
2882: if (!open (MANAGERS, $tablename)) {
2883: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
2884: return;
2885: }
2886: while(my $host = <MANAGERS>) {
2887: chomp($host);
2888: if ($host =~ "^#") { # Comment line.
2889: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
2890: next;
2891: }
2892: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 2893: # The entry is of the form:
2894: # cluname:hostname
2895: # cluname - A 'cluster hostname' is needed in order to negotiate
2896: # the host key.
2897: # hostname- The dns name of the host.
2898: #
1.178.2.4 albertel 2899: my($cluname, $dnsname) = split(/:/, $host);
2900:
2901: my $ip = gethostbyname($dnsname);
2902: if(defined($ip)) { # bad names don't deserve entry.
2903: my $hostip = inet_ntoa($ip);
2904: $managers{$hostip} = $cluname;
2905: logthis('<font color="green"> registering manager '.
2906: "$dnsname as $cluname with $hostip </font>\n");
2907: }
2908: } else {
2909: logthis('<font color="green"> existing host'." $host</font>\n");
2910: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
2911: }
2912: }
1.156 foxr 2913: }
1.140 foxr 2914:
2915: #
2916: # ValidManager: Determines if a given certificate represents a valid manager.
2917: # in this primitive implementation, the 'certificate' is
2918: # just the connecting loncapa client name. This is checked
2919: # against a valid client list in the configuration.
2920: #
2921: #
2922: sub ValidManager {
2923: my $certificate = shift;
2924:
1.163 foxr 2925: return isManager;
1.140 foxr 2926: }
2927: #
1.143 foxr 2928: # CopyFile: Called as part of the process of installing a
2929: # new configuration file. This function copies an existing
2930: # file to a backup file.
2931: # Parameters:
2932: # oldfile - Name of the file to backup.
2933: # newfile - Name of the backup file.
2934: # Return:
2935: # 0 - Failure (errno has failure reason).
2936: # 1 - Success.
2937: #
2938: sub CopyFile {
2939: my $oldfile = shift;
2940: my $newfile = shift;
2941:
2942: # The file must exist:
2943:
2944: if(-e $oldfile) {
2945:
1.178.2.4 albertel 2946: # Read the old file.
1.143 foxr 2947:
2948: my $oldfh = IO::File->new("< $oldfile");
2949: if(!$oldfh) {
2950: return 0;
2951: }
2952: my @contents = <$oldfh>; # Suck in the entire file.
2953:
2954: # write the backup file:
2955:
2956: my $newfh = IO::File->new("> $newfile");
2957: if(!(defined $newfh)){
2958: return 0;
2959: }
2960: my $lines = scalar @contents;
2961: for (my $i =0; $i < $lines; $i++) {
2962: print $newfh ($contents[$i]);
2963: }
2964:
2965: $oldfh->close;
2966: $newfh->close;
2967:
2968: chmod(0660, $newfile);
2969:
2970: return 1;
2971:
2972: } else {
2973: return 0;
2974: }
2975: }
1.157 foxr 2976: #
2977: # Host files are passed out with externally visible host IPs.
2978: # If, for example, we are behind a fire-wall or NAT host, our
2979: # internally visible IP may be different than the externally
2980: # visible IP. Therefore, we always adjust the contents of the
2981: # host file so that the entry for ME is the IP that we believe
2982: # we have. At present, this is defined as the entry that
2983: # DNS has for us. If by some chance we are not able to get a
2984: # DNS translation for us, then we assume that the host.tab file
2985: # is correct.
2986: # BUGBUGBUG - in the future, we really should see if we can
2987: # easily query the interface(s) instead.
2988: # Parameter(s):
2989: # contents - The contents of the host.tab to check.
2990: # Returns:
2991: # newcontents - The adjusted contents.
2992: #
2993: #
2994: sub AdjustHostContents {
2995: my $contents = shift;
2996: my $adjusted;
2997: my $me = $perlvar{'lonHostID'};
2998:
1.178.2.4 albertel 2999: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 3000: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
3001: chomp($line);
3002: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
3003: if ($id eq $me) {
1.178.2.4 albertel 3004: my $ip = gethostbyname($name);
3005: my $ipnew = inet_ntoa($ip);
3006: $ip = $ipnew;
1.157 foxr 3007: # Reconstruct the host line and append to adjusted:
3008:
1.178.2.4 albertel 3009: my $newline = "$id:$domain:$role:$name:$ip";
3010: if($maxcon ne "") { # Not all hosts have loncnew tuning params
3011: $newline .= ":$maxcon:$idleto:$mincon";
3012: }
3013: $adjusted .= $newline."\n";
1.157 foxr 3014:
1.178.2.4 albertel 3015: } else { # Not me, pass unmodified.
3016: $adjusted .= $line."\n";
3017: }
1.157 foxr 3018: } else { # Blank or comment never re-written.
3019: $adjusted .= $line."\n"; # Pass blanks and comments as is.
3020: }
1.178.2.4 albertel 3021: }
3022: return $adjusted;
1.157 foxr 3023: }
1.143 foxr 3024: #
3025: # InstallFile: Called to install an administrative file:
3026: # - The file is created with <name>.tmp
3027: # - The <name>.tmp file is then mv'd to <name>
3028: # This lugubrious procedure is done to ensure that we are never without
3029: # a valid, even if dated, version of the file regardless of who crashes
3030: # and when the crash occurs.
3031: #
3032: # Parameters:
3033: # Name of the file
3034: # File Contents.
3035: # Return:
3036: # nonzero - success.
3037: # 0 - failure and $! has an errno.
3038: #
3039: sub InstallFile {
3040: my $Filename = shift;
3041: my $Contents = shift;
3042: my $TempFile = $Filename.".tmp";
3043:
3044: # Open the file for write:
1.178.2.4 albertel 3045:
1.143 foxr 3046: my $fh = IO::File->new("> $TempFile"); # Write to temp.
3047: if(!(defined $fh)) {
3048: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
3049: return 0;
3050: }
3051: # write the contents of the file:
1.178.2.4 albertel 3052:
1.143 foxr 3053: print $fh ($Contents);
3054: $fh->close; # In case we ever have a filesystem w. locking
3055:
3056: chmod(0660, $TempFile);
3057:
3058: # Now we can move install the file in position.
3059:
3060: move($TempFile, $Filename);
3061:
3062: return 1;
3063: }
1.169 foxr 3064: #
3065: # ConfigFileFromSelector: converts a configuration file selector
3066: # (one of host or domain at this point) into a
3067: # configuration file pathname.
3068: #
3069: # Parameters:
3070: # selector - Configuration file selector.
3071: # Returns:
3072: # Full path to the file or undef if the selector is invalid.
3073: #
3074: sub ConfigFileFromSelector {
3075: my $selector = shift;
3076: my $tablefile;
3077:
3078: my $tabledir = $perlvar{'lonTabDir'}.'/';
3079: if ($selector eq "hosts") {
3080: $tablefile = $tabledir."hosts.tab";
3081: } elsif ($selector eq "domain") {
3082: $tablefile = $tabledir."domain.tab";
3083: } else {
3084: return undef;
3085: }
3086: return $tablefile;
1.143 foxr 3087:
1.169 foxr 3088: }
1.143 foxr 3089: #
1.141 foxr 3090: # PushFile: Called to do an administrative push of a file.
3091: # - Ensure the file being pushed is one we support.
3092: # - Backup the old file to <filename.saved>
3093: # - Separate the contents of the new file out from the
3094: # rest of the request.
3095: # - Write the new file.
3096: # Parameter:
3097: # Request - The entire user request. This consists of a : separated
3098: # string pushfile:tablename:contents.
3099: # NOTE: The contents may have :'s in it as well making things a bit
3100: # more interesting... but not much.
3101: # Returns:
3102: # String to send to client ("ok" or "refused" if bad file).
3103: #
3104: sub PushFile {
3105: my $request = shift;
3106: my ($command, $filename, $contents) = split(":", $request, 3);
3107:
3108: # At this point in time, pushes for only the following tables are
3109: # supported:
3110: # hosts.tab ($filename eq host).
3111: # domain.tab ($filename eq domain).
3112: # Construct the destination filename or reject the request.
3113: #
3114: # lonManage is supposed to ensure this, however this session could be
3115: # part of some elaborate spoof that managed somehow to authenticate.
3116: #
3117:
1.169 foxr 3118:
3119: my $tablefile = ConfigFileFromSelector($filename);
3120: if(! (defined $tablefile)) {
1.141 foxr 3121: return "refused";
3122: }
3123: #
3124: # >copy< the old table to the backup table
3125: # don't rename in case system crashes/reboots etc. in the time
3126: # window between a rename and write.
3127: #
3128: my $backupfile = $tablefile;
3129: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 3130: if(!CopyFile($tablefile, $backupfile)) {
3131: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
3132: return "error:$!";
3133: }
1.141 foxr 3134: &logthis('<font color="green"> Pushfile: backed up '
1.178.2.4 albertel 3135: .$tablefile." to $backupfile</font>");
1.141 foxr 3136:
1.157 foxr 3137: # If the file being pushed is the host file, we adjust the entry for ourself so that the
3138: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
3139: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
3140: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
3141: # that possibilty.
3142:
3143: if($filename eq "host") {
3144: $contents = AdjustHostContents($contents);
3145: }
3146:
1.141 foxr 3147: # Install the new file:
3148:
1.143 foxr 3149: if(!InstallFile($tablefile, $contents)) {
3150: &logthis('<font color="red"> Pushfile: unable to install '
1.178.2.4 albertel 3151: .$tablefile." $! </font>");
1.143 foxr 3152: return "error:$!";
1.178.2.4 albertel 3153: } else {
1.143 foxr 3154: &logthis('<font color="green"> Installed new '.$tablefile
3155: ."</font>");
1.178.2.4 albertel 3156:
1.143 foxr 3157: }
3158:
1.141 foxr 3159:
3160: # Indicate success:
3161:
3162: return "ok";
3163:
3164: }
1.145 foxr 3165:
3166: #
3167: # Called to re-init either lonc or lond.
3168: #
3169: # Parameters:
3170: # request - The full request by the client. This is of the form
3171: # reinit:<process>
3172: # where <process> is allowed to be either of
3173: # lonc or lond
3174: #
3175: # Returns:
3176: # The string to be sent back to the client either:
3177: # ok - Everything worked just fine.
3178: # error:why - There was a failure and why describes the reason.
3179: #
3180: #
3181: sub ReinitProcess {
3182: my $request = shift;
3183:
1.146 foxr 3184:
3185: # separate the request (reinit) from the process identifier and
3186: # validate it producing the name of the .pid file for the process.
3187: #
3188: #
3189: my ($junk, $process) = split(":", $request);
1.147 foxr 3190: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 3191: if($process eq 'lonc') {
3192: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 3193: if (!open(PIDFILE, "< $processpidfile")) {
3194: return "error:Open failed for $processpidfile";
3195: }
3196: my $loncpid = <PIDFILE>;
3197: close(PIDFILE);
3198: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
3199: ."</font>");
3200: kill("USR2", $loncpid);
1.146 foxr 3201: } elsif ($process eq 'lond') {
1.147 foxr 3202: logthis('<font color="red"> Reinitializing self (lond) </font>');
3203: &UpdateHosts; # Lond is us!!
1.146 foxr 3204: } else {
3205: &logthis('<font color="yellow" Invalid reinit request for '.$process
3206: ."</font>");
3207: return "error:Invalid process identifier $process";
3208: }
1.145 foxr 3209: return 'ok';
3210: }
1.168 foxr 3211: # Validate a line in a configuration file edit script:
3212: # Validation includes:
3213: # - Ensuring the command is valid.
3214: # - Ensuring the command has sufficient parameters
3215: # Parameters:
3216: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 3217: #
1.168 foxr 3218: # Return:
3219: # 0 - Invalid scriptline.
3220: # 1 - Valid scriptline
3221: # NOTE:
3222: # Only the command syntax is checked, not the executability of the
3223: # command.
3224: #
3225: sub isValidEditCommand {
3226: my $scriptline = shift;
3227:
3228: # Line elements are pipe separated:
3229:
3230: my ($command, $key, $newline) = split(/\|/, $scriptline);
3231: &logthis('<font color="green"> isValideditCommand checking: '.
3232: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
3233:
3234: if ($command eq "delete") {
3235: #
3236: # key with no newline.
3237: #
3238: if( ($key eq "") || ($newline ne "")) {
3239: return 0; # Must have key but no newline.
3240: } else {
3241: return 1; # Valid syntax.
3242: }
1.169 foxr 3243: } elsif ($command eq "replace") {
1.168 foxr 3244: #
3245: # key and newline:
3246: #
3247: if (($key eq "") || ($newline eq "")) {
3248: return 0;
3249: } else {
3250: return 1;
3251: }
1.169 foxr 3252: } elsif ($command eq "append") {
3253: if (($key ne "") && ($newline eq "")) {
3254: return 1;
3255: } else {
3256: return 0;
3257: }
1.168 foxr 3258: } else {
3259: return 0; # Invalid command.
3260: }
3261: return 0; # Should not get here!!!
3262: }
1.169 foxr 3263: #
3264: # ApplyEdit - Applies an edit command to a line in a configuration
3265: # file. It is the caller's responsiblity to validate the
3266: # edit line.
3267: # Parameters:
3268: # $directive - A single edit directive to apply.
3269: # Edit directives are of the form:
3270: # append|newline - Appends a new line to the file.
3271: # replace|key|newline - Replaces the line with key value 'key'
3272: # delete|key - Deletes the line with key value 'key'.
3273: # $editor - A config file editor object that contains the
3274: # file being edited.
3275: #
3276: sub ApplyEdit {
3277: my $directive = shift;
3278: my $editor = shift;
3279:
3280: # Break the directive down into its command and its parameters
3281: # (at most two at this point. The meaning of the parameters, if in fact
3282: # they exist depends on the command).
3283:
3284: my ($command, $p1, $p2) = split(/\|/, $directive);
3285:
3286: if($command eq "append") {
3287: $editor->Append($p1); # p1 - key p2 null.
3288: } elsif ($command eq "replace") {
3289: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
3290: } elsif ($command eq "delete") {
3291: $editor->DeleteLine($p1); # p1 - key p2 null.
3292: } else { # Should not get here!!!
1.178.2.4 albertel 3293: die "Invalid command given to ApplyEdit $command";
1.169 foxr 3294: }
3295: }
3296: #
3297: # AdjustOurHost:
3298: # Adjusts a host file stored in a configuration file editor object
3299: # for the true IP address of this host. This is necessary for hosts
3300: # that live behind a firewall.
3301: # Those hosts have a publicly distributed IP of the firewall, but
3302: # internally must use their actual IP. We assume that a given
3303: # host only has a single IP interface for now.
3304: # Formal Parameters:
3305: # editor - The configuration file editor to adjust. This
3306: # editor is assumed to contain a hosts.tab file.
3307: # Strategy:
3308: # - Figure out our hostname.
3309: # - Lookup the entry for this host.
3310: # - Modify the line to contain our IP
3311: # - Do a replace for this host.
3312: sub AdjustOurHost {
3313: my $editor = shift;
3314:
3315: # figure out who I am.
3316:
3317: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
3318:
3319: # Get my host file entry.
3320:
3321: my $ConfigLine = $editor->Find($myHostName);
3322: if(! (defined $ConfigLine)) {
3323: die "AdjustOurHost - no entry for me in hosts file $myHostName";
3324: }
3325: # figure out my IP:
3326: # Use the config line to get my hostname.
3327: # Use gethostbyname to translate that into an IP address.
3328: #
3329: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
3330: my $BinaryIp = gethostbyname($name);
3331: my $ip = inet_ntoa($ip);
3332: #
3333: # Reassemble the config line from the elements in the list.
3334: # Note that if the loncnew items were not present before, they will
3335: # be now even if they would be empty
3336: #
3337: my $newConfigLine = $id;
3338: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
3339: $newConfigLine .= ":".$item;
3340: }
3341: # Replace the line:
3342:
3343: $editor->ReplaceLine($id, $newConfigLine);
3344:
3345: }
3346: #
3347: # ReplaceConfigFile:
3348: # Replaces a configuration file with the contents of a
3349: # configuration file editor object.
3350: # This is done by:
3351: # - Copying the target file to <filename>.old
3352: # - Writing the new file to <filename>.tmp
3353: # - Moving <filename.tmp> -> <filename>
3354: # This laborious process ensures that the system is never without
3355: # a configuration file that's at least valid (even if the contents
3356: # may be dated).
3357: # Parameters:
3358: # filename - Name of the file to modify... this is a full path.
3359: # editor - Editor containing the file.
3360: #
3361: sub ReplaceConfigFile {
3362: my $filename = shift;
3363: my $editor = shift;
1.168 foxr 3364:
1.169 foxr 3365: CopyFile ($filename, $filename.".old");
3366:
3367: my $contents = $editor->Get(); # Get the contents of the file.
3368:
3369: InstallFile($filename, $contents);
3370: }
1.168 foxr 3371: #
3372: #
3373: # Called to edit a configuration table file
1.167 foxr 3374: # Parameters:
3375: # request - The entire command/request sent by lonc or lonManage
3376: # Return:
3377: # The reply to send to the client.
1.168 foxr 3378: #
1.167 foxr 3379: sub EditFile {
3380: my $request = shift;
3381:
3382: # Split the command into it's pieces: edit:filetype:script
3383:
1.168 foxr 3384: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 3385:
3386: # Check the pre-coditions for success:
3387:
3388: if($request != "edit") { # Something is amiss afoot alack.
3389: return "error:edit request detected, but request != 'edit'\n";
3390: }
3391: if( ($filetype ne "hosts") &&
3392: ($filetype ne "domain")) {
3393: return "error:edit requested with invalid file specifier: $filetype \n";
3394: }
3395:
3396: # Split the edit script and check it's validity.
1.168 foxr 3397:
3398: my @scriptlines = split(/\n/, $script); # one line per element.
3399: my $linecount = scalar(@scriptlines);
3400: for(my $i = 0; $i < $linecount; $i++) {
3401: chomp($scriptlines[$i]);
3402: if(!isValidEditCommand($scriptlines[$i])) {
3403: return "error:edit with bad script line: '$scriptlines[$i]' \n";
3404: }
3405: }
1.145 foxr 3406:
1.167 foxr 3407: # Execute the edit operation.
1.169 foxr 3408: # - Create a config file editor for the appropriate file and
3409: # - execute each command in the script:
3410: #
3411: my $configfile = ConfigFileFromSelector($filetype);
3412: if (!(defined $configfile)) {
3413: return "refused\n";
3414: }
3415: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 3416:
1.169 foxr 3417: for (my $i = 0; $i < $linecount; $i++) {
3418: ApplyEdit($scriptlines[$i], $editor);
3419: }
3420: # If the file is the host file, ensure that our host is
3421: # adjusted to have our ip:
3422: #
3423: if($filetype eq "host") {
3424: AdjustOurHost($editor);
3425: }
3426: # Finally replace the current file with our file.
3427: #
3428: ReplaceConfigFile($configfile, $editor);
1.167 foxr 3429:
3430: return "ok\n";
3431: }
1.141 foxr 3432: #
1.96 foxr 3433: # Convert an error return code from lcpasswd to a string value.
3434: #
3435: sub lcpasswdstrerror {
3436: my $ErrorCode = shift;
1.97 foxr 3437: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 3438: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3439: } else {
1.98 foxr 3440: return $passwderrors[$ErrorCode];
1.96 foxr 3441: }
3442: }
3443:
1.97 foxr 3444: #
3445: # Convert an error return code from lcuseradd to a string value:
3446: #
3447: sub lcuseraddstrerror {
3448: my $ErrorCode = shift;
3449: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3450: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3451: } else {
1.98 foxr 3452: return $adderrors[$ErrorCode];
1.97 foxr 3453: }
3454: }
3455:
1.23 harris41 3456: # grabs exception and records it to log before exiting
3457: sub catchexception {
1.27 albertel 3458: my ($error)=@_;
1.25 www 3459: $SIG{'QUIT'}='DEFAULT';
3460: $SIG{__DIE__}='DEFAULT';
1.165 albertel 3461: &status("Catching exception");
1.23 harris41 3462: &logthis("<font color=red>CRITICAL: "
1.178.2.4 albertel 3463: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
3464: ."a crash with this error msg->[$error]</font>");
1.57 www 3465: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 3466: if ($client) { print $client "error: $error\n"; }
1.59 www 3467: $server->close();
1.27 albertel 3468: die($error);
1.23 harris41 3469: }
3470:
1.63 www 3471: sub timeout {
1.165 albertel 3472: &status("Handling Timeout");
1.63 www 3473: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
3474: &catchexception('Timeout');
3475: }
1.22 harris41 3476: # -------------------------------- Set signal handlers to record abnormal exits
3477:
3478: $SIG{'QUIT'}=\&catchexception;
3479: $SIG{__DIE__}=\&catchexception;
3480:
1.81 matthew 3481: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 3482: &status("Read loncapa.conf and loncapa_apache.conf");
3483: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 3484: %perlvar=%{$perlvarref};
1.80 harris41 3485: undef $perlvarref;
1.19 www 3486:
1.35 harris41 3487: # ----------------------------- Make sure this process is running from user=www
3488: my $wwwid=getpwnam('www');
3489: if ($wwwid!=$<) {
1.178.2.4 albertel 3490: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3491: my $subj="LON: $currenthostid User ID mismatch";
3492: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 3493: mailto $emailto -s '$subj' > /dev/null");
1.178.2.4 albertel 3494: exit 1;
1.35 harris41 3495: }
3496:
1.19 www 3497: # --------------------------------------------- Check if other instance running
3498:
3499: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3500:
3501: if (-e $pidfile) {
1.178.2.4 albertel 3502: my $lfh=IO::File->new("$pidfile");
3503: my $pide=<$lfh>;
3504: chomp($pide);
3505: if (kill 0 => $pide) { die "already running"; }
1.19 www 3506: }
1.1 albertel 3507:
3508: # ------------------------------------------------------------- Read hosts file
3509:
3510:
3511:
3512: # establish SERVER socket, bind and listen.
3513: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3514: Type => SOCK_STREAM,
3515: Proto => 'tcp',
3516: Reuse => 1,
3517: Listen => 10 )
1.178.2.4 albertel 3518: or die "making socket: $@\n";
1.1 albertel 3519:
3520: # --------------------------------------------------------- Do global variables
3521:
3522: # global variables
3523:
1.134 albertel 3524: my %children = (); # keys are current child process IDs
1.178.2.1 foxr 3525: my $children = 0; # current number of children
1.1 albertel 3526:
3527: sub REAPER { # takes care of dead children
3528: $SIG{CHLD} = \&REAPER;
1.165 albertel 3529: &status("Handling child death");
1.178.2.1 foxr 3530: my $pid = wait;
3531: if (defined($children{$pid})) {
3532: &logthis("Child $pid died");
3533: $children --;
3534: delete $children{$pid};
3535: } else {
3536: &logthis("Unknown Child $pid died");
1.176 albertel 3537: }
1.165 albertel 3538: &status("Finished Handling child death");
1.1 albertel 3539: }
3540:
3541: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 3542: &status("Killing children (INT)");
1.1 albertel 3543: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3544: kill 'INT' => keys %children;
1.59 www 3545: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 3546: my $execdir=$perlvar{'lonDaemons'};
3547: unlink("$execdir/logs/lond.pid");
1.9 www 3548: &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.165 albertel 3549: &status("Done killing children");
1.1 albertel 3550: exit; # clean up with dignity
3551: }
3552:
3553: sub HUPSMAN { # signal handler for SIGHUP
3554: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 3555: &status("Killing children for restart (HUP)");
1.1 albertel 3556: kill 'INT' => keys %children;
1.59 www 3557: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9 www 3558: &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134 albertel 3559: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 3560: unlink("$execdir/logs/lond.pid");
1.165 albertel 3561: &status("Restarting self (HUP)");
1.1 albertel 3562: exec("$execdir/lond"); # here we go again
3563: }
3564:
1.144 foxr 3565: #
1.148 foxr 3566: # Kill off hashes that describe the host table prior to re-reading it.
3567: # Hashes affected are:
3568: # %hostid, %hostdom %hostip
3569: #
3570: sub KillHostHashes {
3571: foreach my $key (keys %hostid) {
3572: delete $hostid{$key};
3573: }
3574: foreach my $key (keys %hostdom) {
3575: delete $hostdom{$key};
3576: }
3577: foreach my $key (keys %hostip) {
3578: delete $hostip{$key};
3579: }
3580: }
3581: #
3582: # Read in the host table from file and distribute it into the various hashes:
3583: #
3584: # - %hostid - Indexed by IP, the loncapa hostname.
3585: # - %hostdom - Indexed by loncapa hostname, the domain.
3586: # - %hostip - Indexed by hostid, the Ip address of the host.
3587: sub ReadHostTable {
3588:
3589: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
3590:
3591: while (my $configline=<CONFIG>) {
1.178.2.1 foxr 3592: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3593: chomp($ip); $ip=~s/\D+$//;
3594: $hostid{$ip}=$id;
3595: $hostdom{$id}=$domain;
3596: $hostip{$id}=$ip;
3597: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
1.148 foxr 3598: }
3599: close(CONFIG);
3600: }
3601: #
3602: # Reload the Apache daemon's state.
1.150 foxr 3603: # This is done by invoking /home/httpd/perl/apachereload
3604: # a setuid perl script that can be root for us to do this job.
1.148 foxr 3605: #
3606: sub ReloadApache {
1.150 foxr 3607: my $execdir = $perlvar{'lonDaemons'};
3608: my $script = $execdir."/apachereload";
3609: system($script);
1.148 foxr 3610: }
3611:
3612: #
1.144 foxr 3613: # Called in response to a USR2 signal.
3614: # - Reread hosts.tab
3615: # - All children connected to hosts that were removed from hosts.tab
3616: # are killed via SIGINT
3617: # - All children connected to previously existing hosts are sent SIGUSR1
3618: # - Our internal hosts hash is updated to reflect the new contents of
3619: # hosts.tab causing connections from hosts added to hosts.tab to
3620: # now be honored.
3621: #
3622: sub UpdateHosts {
1.165 albertel 3623: &status("Reload hosts.tab");
1.147 foxr 3624: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 3625: #
3626: # The %children hash has the set of IP's we currently have children
3627: # on. These need to be matched against records in the hosts.tab
3628: # Any ip's no longer in the table get killed off they correspond to
3629: # either dropped or changed hosts. Note that the re-read of the table
3630: # will take care of new and changed hosts as connections come into being.
3631:
3632:
3633: KillHostHashes;
3634: ReadHostTable;
3635:
3636: foreach my $child (keys %children) {
3637: my $childip = $children{$child};
3638: if(!$hostid{$childip}) {
1.149 foxr 3639: logthis('<font color="blue"> UpdateHosts killing child '
3640: ." $child for ip $childip </font>");
1.148 foxr 3641: kill('INT', $child);
1.149 foxr 3642: } else {
3643: logthis('<font color="green"> keeping child for ip '
3644: ." $childip (pid=$child) </font>");
1.148 foxr 3645: }
3646: }
3647: ReloadApache;
1.165 albertel 3648: &status("Finished reloading hosts.tab");
1.144 foxr 3649: }
3650:
1.148 foxr 3651:
1.57 www 3652: sub checkchildren {
1.165 albertel 3653: &status("Checking on the children (sending signals)");
1.57 www 3654: &initnewstatus();
3655: &logstatus();
3656: &logthis('Going to check on the children');
1.134 albertel 3657: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 3658: foreach (sort keys %children) {
1.57 www 3659: sleep 1;
3660: unless (kill 'USR1' => $_) {
3661: &logthis ('Child '.$_.' is dead');
3662: &logstatus($$.' is dead');
3663: }
1.61 harris41 3664: }
1.63 www 3665: sleep 5;
1.113 albertel 3666: $SIG{ALRM} = sub { die "timeout" };
3667: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 3668: &status("Checking on the children (waiting for reports)");
1.63 www 3669: foreach (sort keys %children) {
3670: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.178.2.4 albertel 3671: eval {
3672: alarm(300);
3673: &logthis('Child '.$_.' did not respond');
3674: kill 9 => $_;
3675: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3676: #$subj="LON: $currenthostid killed lond process $_";
3677: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3678: #$execdir=$perlvar{'lonDaemons'};
3679: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3680: alarm(0);
3681: }
1.63 www 3682: }
3683: }
1.113 albertel 3684: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 3685: $SIG{__DIE__} = \&catchexception;
1.165 albertel 3686: &status("Finished checking children");
1.57 www 3687: }
3688:
1.1 albertel 3689: # --------------------------------------------------------------------- Logging
3690:
3691: sub logthis {
3692: my $message=shift;
3693: my $execdir=$perlvar{'lonDaemons'};
3694: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3695: my $now=time;
3696: my $local=localtime($now);
1.58 www 3697: $lastlog=$local.': '.$message;
1.1 albertel 3698: print $fh "$local ($$): $message\n";
3699: }
3700:
1.77 foxr 3701: # ------------------------- Conditional log if $DEBUG true.
3702: sub Debug {
3703: my $message = shift;
3704: if($DEBUG) {
3705: &logthis($message);
3706: }
3707: }
1.161 foxr 3708:
3709: #
3710: # Sub to do replies to client.. this gives a hook for some
3711: # debug tracing too:
3712: # Parameters:
3713: # fd - File open on client.
3714: # reply - Text to send to client.
3715: # request - Original request from client.
3716: #
1.178.2.1 foxr 3717: # Note: This increments Transactions
3718: #
1.161 foxr 3719: sub Reply {
1.178.2.1 foxr 3720: alarm(120);
1.161 foxr 3721: my $fd = shift;
3722: my $reply = shift;
3723: my $request = shift;
3724:
3725: print $fd $reply;
3726: Debug("Request was $request Reply was $reply");
3727:
1.178.2.1 foxr 3728: $Transactions++;
3729: alarm(0);
3730:
3731:
3732: }
3733: #
3734: # Sub to report a failure.
3735: # This function:
3736: # - Increments the failure statistic counters.
3737: # - Invokes Reply to send the error message to the client.
3738: # Parameters:
3739: # fd - File descriptor open on the client
3740: # reply - Reply text to emit.
3741: # request - The original request message (used by Reply
3742: # to debug if that's enabled.
3743: # Implicit outputs:
3744: # $Failures- The number of failures is incremented.
3745: # Reply (invoked here) sends a message to the
3746: # client:
3747: #
3748: sub Failure {
1.178.2.4 albertel 3749: my $fd = shift;
3750: my $reply = shift;
3751: my $request = shift;
1.178.2.1 foxr 3752:
1.178.2.4 albertel 3753: $Failures++;
3754: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 3755: }
1.57 www 3756: # ------------------------------------------------------------------ Log status
3757:
3758: sub logstatus {
1.178.2.4 albertel 3759: &status("Doing logging");
3760: my $docdir=$perlvar{'lonDocRoot'};
3761: {
3762: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
3763: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
3764: $fh->close();
3765: }
3766: &status("Finished londstatus.txt");
3767: {
3768: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3769: print $fh $status."\n".$lastlog."\n".time;
3770: $fh->close();
3771: }
3772: ResetStatistics;
3773: &status("Finished logging");
1.178.2.1 foxr 3774:
1.57 www 3775: }
3776:
3777: sub initnewstatus {
3778: my $docdir=$perlvar{'lonDocRoot'};
3779: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3780: my $now=time;
3781: my $local=localtime($now);
3782: print $fh "LOND status $local - parent $$\n\n";
1.64 www 3783: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 3784: while (my $filename=readdir(DIR)) {
1.64 www 3785: unlink("$docdir/lon-status/londchld/$filename");
3786: }
3787: closedir(DIR);
1.57 www 3788: }
3789:
3790: # -------------------------------------------------------------- Status setting
3791:
3792: sub status {
3793: my $what=shift;
3794: my $now=time;
3795: my $local=localtime($now);
1.178.2.1 foxr 3796: my $status = "lond: $what $local ";
3797: if($Transactions) {
1.178.2.4 albertel 3798: $status .= " Transactions: $Transactions Failed; $Failures";
1.178.2.1 foxr 3799: }
3800: $0=$status;
1.57 www 3801: }
1.11 www 3802:
3803: # -------------------------------------------------------- Escape Special Chars
3804:
3805: sub escape {
3806: my $str=shift;
3807: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3808: return $str;
3809: }
3810:
3811: # ----------------------------------------------------- Un-Escape Special Chars
3812:
3813: sub unescape {
3814: my $str=shift;
3815: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3816: return $str;
3817: }
3818:
1.1 albertel 3819: # ----------------------------------------------------------- Send USR1 to lonc
3820:
3821: sub reconlonc {
3822: my $peerfile=shift;
3823: &logthis("Trying to reconnect for $peerfile");
3824: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3825: if (my $fh=IO::File->new("$loncfile")) {
3826: my $loncpid=<$fh>;
3827: chomp($loncpid);
3828: if (kill 0 => $loncpid) {
3829: &logthis("lonc at pid $loncpid responding, sending USR1");
3830: kill USR1 => $loncpid;
3831: } else {
1.178.2.4 albertel 3832: &logthis("<font color=red>CRITICAL: "
3833: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 3834: }
3835: } else {
1.178.2.4 albertel 3836: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1 albertel 3837: }
3838: }
3839:
3840: # -------------------------------------------------- Non-critical communication
1.11 www 3841:
1.1 albertel 3842: sub subreply {
3843: my ($cmd,$server)=@_;
3844: my $peerfile="$perlvar{'lonSockDir'}/$server";
3845: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3846: Type => SOCK_STREAM,
3847: Timeout => 10)
1.178.2.4 albertel 3848: or return "con_lost";
1.1 albertel 3849: print $sclient "$cmd\n";
3850: my $answer=<$sclient>;
3851: chomp($answer);
3852: if (!$answer) { $answer="con_lost"; }
3853: return $answer;
3854: }
3855:
3856: sub reply {
1.178.2.4 albertel 3857: my ($cmd,$server)=@_;
3858: my $answer;
3859: if ($server ne $currenthostid) {
3860: $answer=subreply($cmd,$server);
3861: if ($answer eq 'con_lost') {
3862: $answer=subreply("ping",$server);
3863: if ($answer ne $server) {
3864: &logthis("sub reply: answer != server answer is $answer, server is $server");
3865: &reconlonc("$perlvar{'lonSockDir'}/$server");
3866: }
3867: $answer=subreply($cmd,$server);
3868: }
3869: } else {
3870: $answer='self_reply';
3871: }
3872: return $answer;
1.1 albertel 3873: }
3874:
1.13 www 3875: # -------------------------------------------------------------- Talk to lonsql
3876:
1.12 harris41 3877: sub sqlreply {
3878: my ($cmd)=@_;
3879: my $answer=subsqlreply($cmd);
3880: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3881: return $answer;
3882: }
3883:
3884: sub subsqlreply {
3885: my ($cmd)=@_;
3886: my $unixsock="mysqlsock";
3887: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3888: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3889: Type => SOCK_STREAM,
3890: Timeout => 10)
1.178.2.4 albertel 3891: or return "con_lost";
1.12 harris41 3892: print $sclient "$cmd\n";
3893: my $answer=<$sclient>;
3894: chomp($answer);
3895: if (!$answer) { $answer="con_lost"; }
3896: return $answer;
3897: }
3898:
1.1 albertel 3899: # -------------------------------------------- Return path to profile directory
1.11 www 3900:
1.1 albertel 3901: sub propath {
3902: my ($udom,$uname)=@_;
3903: $udom=~s/\W//g;
3904: $uname=~s/\W//g;
1.16 www 3905: my $subdir=$uname.'__';
1.1 albertel 3906: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3907: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3908: return $proname;
3909: }
3910:
3911: # --------------------------------------- Is this the home server of an author?
1.11 www 3912:
1.1 albertel 3913: sub ishome {
3914: my $author=shift;
3915: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3916: my ($udom,$uname)=split(/\//,$author);
3917: my $proname=propath($udom,$uname);
3918: if (-e $proname) {
3919: return 'owner';
3920: } else {
3921: return 'not_owner';
3922: }
3923: }
3924:
3925: # ======================================================= Continue main program
3926: # ---------------------------------------------------- Fork once and dissociate
3927:
1.134 albertel 3928: my $fpid=fork;
1.1 albertel 3929: exit if $fpid;
1.29 harris41 3930: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 3931:
1.29 harris41 3932: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 3933:
3934: # ------------------------------------------------------- Write our PID on disk
3935:
1.134 albertel 3936: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 3937: open (PIDSAVE,">$execdir/logs/lond.pid");
3938: print PIDSAVE "$$\n";
3939: close(PIDSAVE);
1.9 www 3940: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57 www 3941: &status('Starting');
1.1 albertel 3942:
1.106 foxr 3943:
1.1 albertel 3944:
3945: # ----------------------------------------------------- Install signal handlers
3946:
1.57 www 3947:
1.1 albertel 3948: $SIG{CHLD} = \&REAPER;
3949: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3950: $SIG{HUP} = \&HUPSMAN;
1.57 www 3951: $SIG{USR1} = \&checkchildren;
1.144 foxr 3952: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 3953:
1.148 foxr 3954: # Read the host hashes:
3955:
3956: ReadHostTable;
1.106 foxr 3957:
1.178.2.1 foxr 3958:
1.106 foxr 3959: # --------------------------------------------------------------
3960: # Accept connections. When a connection comes in, it is validated
3961: # and if good, a child process is created to process transactions
3962: # along the connection.
3963:
1.1 albertel 3964: while (1) {
1.165 albertel 3965: &status('Starting accept');
1.106 foxr 3966: $client = $server->accept() or next;
1.165 albertel 3967: &status('Accepted '.$client.' off to spawn');
1.106 foxr 3968: make_new_child($client);
1.165 albertel 3969: &status('Finished spawning');
1.1 albertel 3970: }
3971:
3972: sub make_new_child {
3973: my $pid;
3974: my $sigset;
1.106 foxr 3975:
3976: $client = shift;
1.165 albertel 3977: &status('Starting new child '.$client);
1.161 foxr 3978: &logthis('<font color="green"> Attempting to start child ('.$client.
3979: ")</font>");
1.1 albertel 3980: # block signal for fork
3981: $sigset = POSIX::SigSet->new(SIGINT);
3982: sigprocmask(SIG_BLOCK, $sigset)
1.29 harris41 3983: or die "Can't block SIGINT for fork: $!\n";
1.178.2.4 albertel 3984:
1.29 harris41 3985: die "fork: $!" unless defined ($pid = fork);
1.148 foxr 3986:
3987: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3988: # connection liveness.
3989:
3990: #
3991: # Figure out who we're talking to so we can record the peer in
3992: # the pid hash.
3993: #
3994: my $caller = getpeername($client);
3995: my ($port,$iaddr)=unpack_sockaddr_in($caller);
3996: $clientip=inet_ntoa($iaddr);
1.1 albertel 3997:
3998: if ($pid) {
3999: # Parent records the child's birth and returns.
4000: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 4001: or die "Can't unblock SIGINT for fork: $!\n";
1.148 foxr 4002: $children{$pid} = $clientip;
1.178.2.1 foxr 4003: $children++;
1.57 www 4004: &status('Started child '.$pid);
1.1 albertel 4005: return;
4006: } else {
4007: # Child can *not* return from this subroutine.
4008: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1.126 albertel 4009: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
4010: #don't get intercepted
1.57 www 4011: $SIG{USR1}= \&logstatus;
1.63 www 4012: $SIG{ALRM}= \&timeout;
1.57 www 4013: $lastlog='Forked ';
4014: $status='Forked';
4015:
1.1 albertel 4016: # unblock signals
4017: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 4018: or die "Can't unblock SIGINT for fork: $!\n";
1.13 www 4019:
1.178.2.1 foxr 4020:
4021:
1.91 albertel 4022: &Authen::Krb5::init_context();
4023: &Authen::Krb5::init_ets();
1.178.2.4 albertel 4024:
1.161 foxr 4025: &status('Accepted connection');
1.1 albertel 4026: # =============================================================================
4027: # do something with the connection
4028: # -----------------------------------------------------------------------------
1.148 foxr 4029: # see if we know client and check for spoof IP by challenge
4030:
1.161 foxr 4031: ReadManagerTable; # May also be a manager!!
4032:
4033: my $clientrec=($hostid{$clientip} ne undef);
4034: my $ismanager=($managers{$clientip} ne undef);
4035: $clientname = "[unknonwn]";
4036: if($clientrec) { # Establish client type.
4037: $ConnectionType = "client";
4038: $clientname = $hostid{$clientip};
4039: if($ismanager) {
4040: $ConnectionType = "both";
4041: }
4042: } else {
4043: $ConnectionType = "manager";
4044: $clientname = $managers{$clientip};
4045: }
4046: my $clientok;
4047: if ($clientrec || $ismanager) {
4048: &status("Waiting for init from $clientip $clientname");
4049: &logthis('<font color="yellow">INFO: Connection, '.
4050: $clientip.
1.178.2.4 albertel 4051: " ($clientname) connection type = $ConnectionType </font>" );
1.161 foxr 4052: &status("Connecting $clientip ($clientname))");
4053: my $remotereq=<$client>;
4054: $remotereq=~s/[^\w:]//g;
4055: if ($remotereq =~ /^init/) {
4056: &sethost("sethost:$perlvar{'lonHostID'}");
4057: my $challenge="$$".time;
4058: print $client "$challenge\n";
1.178.2.4 albertel 4059: &status("Waiting for challenge reply from $clientip ($clientname)");
1.161 foxr 4060: $remotereq=<$client>;
4061: $remotereq=~s/\W//g;
4062: if ($challenge eq $remotereq) {
4063: $clientok=1;
4064: print $client "ok\n";
4065: } else {
1.178.2.4 albertel 4066: &logthis("<font color=blue>WARNING: $clientip did not reply challenge</font>");
1.161 foxr 4067: &status('No challenge reply '.$clientip);
4068: }
1.2 www 4069: } else {
1.178.2.4 albertel 4070: &logthis("<font color=blue>WARNING: "
1.161 foxr 4071: ."$clientip failed to initialize: >$remotereq< </font>");
4072: &status('No init '.$clientip);
4073: }
4074: } else {
1.178.2.4 albertel 4075: &logthis("<font color=blue>WARNING: Unknown client $clientip</font>");
1.161 foxr 4076: &status('Hung up on '.$clientip);
4077: }
4078: if ($clientok) {
1.1 albertel 4079: # ---------------- New known client connecting, could mean machine online again
1.161 foxr 4080:
4081: foreach my $id (keys(%hostip)) {
4082: if ($hostip{$id} ne $clientip ||
4083: $hostip{$currenthostid} eq $clientip) {
4084: # no need to try to do recon's to myself
4085: next;
1.115 albertel 4086: }
1.161 foxr 4087: &reconlonc("$perlvar{'lonSockDir'}/$id");
4088: }
4089: &logthis("<font color=green>Established connection: $clientname</font>");
4090: &status('Will listen to '.$clientname);
4091:
1.178.2.1 foxr 4092: ResetStatistics();
1.161 foxr 4093:
1.178.2.1 foxr 4094: # ------------------------------------------------------------ Process requests
4095: my $KeepGoing = 1;
4096: while ((my $userinput=GetRequest) && $KeepGoing) {
4097: $KeepGoing = ProcessRequest($userinput);
1.177 foxr 4098: # -------------------------------------------------------------------- complete
1.178.2.1 foxr 4099:
1.161 foxr 4100: &status('Listening to '.$clientname);
4101: }
1.59 www 4102: # --------------------------------------------- client unknown or fishy, refuse
1.161 foxr 4103: } else {
4104: print $client "refused\n";
4105: $client->close();
4106: &logthis("<font color=blue>WARNING: "
4107: ."Rejected client $clientip, closing connection</font>");
4108: }
4109: }
4110:
1.1 albertel 4111: # =============================================================================
1.161 foxr 4112:
4113: &logthis("<font color=red>CRITICAL: "
4114: ."Disconnect from $clientip ($clientname)</font>");
4115:
4116:
4117: # this exit is VERY important, otherwise the child will become
4118: # a producer of more and more children, forking yourself into
4119: # process death.
4120: exit;
1.106 foxr 4121:
1.78 foxr 4122: }
4123:
4124:
4125: #
4126: # Checks to see if the input roleput request was to set
4127: # an author role. If so, invokes the lchtmldir script to set
4128: # up a correct public_html
4129: # Parameters:
4130: # request - The request sent to the rolesput subchunk.
4131: # We're looking for /domain/_au
4132: # domain - The domain in which the user is having roles doctored.
4133: # user - Name of the user for which the role is being put.
4134: # authtype - The authentication type associated with the user.
4135: #
1.178.2.4 albertel 4136: sub ManagePermissions {
1.78 foxr 4137: my $request = shift;
4138: my $domain = shift;
4139: my $user = shift;
4140: my $authtype= shift;
4141:
4142: # See if the request is of the form /$domain/_au
1.178.2.1 foxr 4143: &logthis("ruequest is $request");
1.78 foxr 4144: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4145: my $execdir = $perlvar{'lonDaemons'};
4146: my $userhome= "/home/$user" ;
1.134 albertel 4147: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 4148: system("$execdir/lchtmldir $userhome $user $authtype");
4149: }
4150: }
1.178.2.8 foxr 4151:
4152: #
4153: # Return the full path of a user password file, whether it exists or not.
4154: # Parameters:
4155: # domain - Domain in which the password file lives.
4156: # user - name of the user.
4157: # Returns:
4158: # Full passwd path:
4159: #
4160: sub PasswordPath {
4161: my $domain = shift;
4162: my $user = shift;
4163:
4164: my $path = &propath($domain, $user);
4165: my $path .= "/passwd";
4166:
4167: return $path;
4168: }
4169:
4170: # Password Filename
4171: # Returns the path to a passwd file given domain and user... only if
4172: # it exists.
4173: # Parameters:
4174: # domain - Domain in which to search.
4175: # user - username.
4176: # Returns:
4177: # - If the password file exists returns its path.
4178: # - If the password file does not exist, returns undefined.
4179: #
4180: sub PasswordFilename {
4181: my $domain = shift;
4182: my $user = shift;
4183:
4184: my $path = PasswordPath($domain, $user);
4185:
4186: if(-e $path) {
4187: return $path;
4188: } else {
4189: return undef;
4190: }
4191: }
4192:
4193: #
4194: # Rewrite the contents of the user's passwd file.
4195: # Parameters:
4196: # domain - domain of the user.
4197: # name - User's name.
4198: # contents - New contents of the file.
4199: # Returns:
4200: # 0 - Failed.
4201: # 1 - Success.
4202: #
4203: sub RewritePwFile {
4204: my $domain = shift;
4205: my $user = shift;
4206: my $contents = shift;
4207:
4208: my $file = PasswordFilename($domain, $user);
4209: if (defined $file) {
4210: my $pf = IO::File->new(">$file");
4211: if($pf) {
4212: print $pf "$contents\n";
4213: return 1;
4214: } else {
4215: return 0;
4216: }
4217: } else {
4218: return 0;
4219: }
4220:
4221: }
1.78 foxr 4222: #
4223: # GetAuthType - Determines the authorization type of a user in a domain.
4224:
4225: # Returns the authorization type or nouser if there is no such user.
4226: #
1.178.2.4 albertel 4227: sub GetAuthType {
1.78 foxr 4228: my $domain = shift;
4229: my $user = shift;
4230:
1.79 foxr 4231: Debug("GetAuthType( $domain, $user ) \n");
1.178.2.8 foxr 4232: my $passwdfile = PasswordFilename($domain, $user);
4233: if( defined $passwdfile ) {
1.78 foxr 4234: my $pf = IO::File->new($passwdfile);
4235: my $realpassword = <$pf>;
4236: chomp($realpassword);
1.79 foxr 4237: Debug("Password info = $realpassword\n");
1.178.2.8 foxr 4238: return $realpassword;
1.178.2.4 albertel 4239: } else {
1.79 foxr 4240: Debug("Returning nouser");
1.78 foxr 4241: return "nouser";
4242: }
1.1 albertel 4243: }
4244:
1.84 albertel 4245: sub addline {
4246: my ($fname,$hostid,$ip,$newline)=@_;
4247: my $contents;
4248: my $found=0;
4249: my $expr='^'.$hostid.':'.$ip.':';
4250: $expr =~ s/\./\\\./g;
1.134 albertel 4251: my $sh;
1.84 albertel 4252: if ($sh=IO::File->new("$fname.subscription")) {
4253: while (my $subline=<$sh>) {
4254: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
4255: }
4256: $sh->close();
4257: }
4258: $sh=IO::File->new(">$fname.subscription");
4259: if ($contents) { print $sh $contents; }
4260: if ($newline) { print $sh $newline; }
4261: $sh->close();
4262: return $found;
1.86 www 4263: }
4264:
4265: sub getchat {
1.122 www 4266: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 4267: my %hash;
4268: my $proname=&propath($cdom,$cname);
4269: my @entries=();
1.88 albertel 4270: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4271: &GDBM_READER(),0640)) {
4272: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4273: untie %hash;
1.123 www 4274: }
1.124 www 4275: my @participants=();
1.134 albertel 4276: my $cutoff=time-60;
1.123 www 4277: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 4278: &GDBM_WRCREAT(),0640)) {
4279: $hash{$uname.':'.$udom}=time;
1.123 www 4280: foreach (sort keys %hash) {
4281: if ($hash{$_}>$cutoff) {
1.124 www 4282: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 4283: }
4284: }
4285: untie %hash;
1.86 www 4286: }
1.124 www 4287: return (@participants,@entries);
1.86 www 4288: }
4289:
4290: sub chatadd {
1.88 albertel 4291: my ($cdom,$cname,$newchat)=@_;
4292: my %hash;
4293: my $proname=&propath($cdom,$cname);
4294: my @entries=();
1.142 www 4295: my $time=time;
1.88 albertel 4296: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4297: &GDBM_WRCREAT(),0640)) {
4298: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4299: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
4300: my ($thentime,$idnum)=split(/\_/,$lastid);
4301: my $newid=$time.'_000000';
4302: if ($thentime==$time) {
4303: $idnum=~s/^0+//;
4304: $idnum++;
4305: $idnum=substr('000000'.$idnum,-6,6);
4306: $newid=$time.'_'.$idnum;
4307: }
4308: $hash{$newid}=$newchat;
4309: my $expired=$time-3600;
4310: foreach (keys %hash) {
4311: my ($thistime)=($_=~/(\d+)\_/);
4312: if ($thistime<$expired) {
1.89 www 4313: delete $hash{$_};
1.88 albertel 4314: }
4315: }
4316: untie %hash;
1.142 www 4317: }
4318: {
4319: my $hfh;
4320: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
4321: print $hfh "$time:".&unescape($newchat)."\n";
4322: }
1.86 www 4323: }
1.84 albertel 4324: }
4325:
4326: sub unsub {
4327: my ($fname,$clientip)=@_;
4328: my $result;
1.161 foxr 4329: if (unlink("$fname.$clientname")) {
1.84 albertel 4330: $result="ok\n";
4331: } else {
4332: $result="not_subscribed\n";
4333: }
4334: if (-e "$fname.subscription") {
1.161 foxr 4335: my $found=&addline($fname,$clientname,$clientip,'');
1.84 albertel 4336: if ($found) { $result="ok\n"; }
4337: } else {
4338: if ($result != "ok\n") { $result="not_subscribed\n"; }
4339: }
4340: return $result;
4341: }
4342:
1.101 www 4343: sub currentversion {
4344: my $fname=shift;
4345: my $version=-1;
4346: my $ulsdir='';
4347: if ($fname=~/^(.+)\/[^\/]+$/) {
1.178.2.4 albertel 4348: $ulsdir=$1;
1.101 www 4349: }
1.114 albertel 4350: my ($fnamere1,$fnamere2);
4351: # remove version if already specified
1.101 www 4352: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 4353: # get the bits that go before and after the version number
4354: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4355: $fnamere1=$1;
4356: $fnamere2='.'.$2;
4357: }
1.101 www 4358: if (-e $fname) { $version=1; }
4359: if (-e $ulsdir) {
1.134 albertel 4360: if(-d $ulsdir) {
4361: if (opendir(LSDIR,$ulsdir)) {
4362: my $ulsfn;
4363: while ($ulsfn=readdir(LSDIR)) {
1.101 www 4364: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 4365: my $thisfile=$ulsdir.'/'.$ulsfn;
4366: unless (-l $thisfile) {
1.160 www 4367: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 4368: if ($1>$version) { $version=$1; }
4369: }
4370: }
4371: }
4372: closedir(LSDIR);
4373: $version++;
4374: }
4375: }
4376: }
4377: return $version;
1.101 www 4378: }
4379:
4380: sub thisversion {
4381: my $fname=shift;
4382: my $version=-1;
4383: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4384: $version=$1;
4385: }
4386: return $version;
4387: }
4388:
1.84 albertel 4389: sub subscribe {
4390: my ($userinput,$clientip)=@_;
4391: my $result;
4392: my ($cmd,$fname)=split(/:/,$userinput);
4393: my $ownership=&ishome($fname);
4394: if ($ownership eq 'owner') {
1.101 www 4395: # explitly asking for the current version?
4396: unless (-e $fname) {
4397: my $currentversion=¤tversion($fname);
4398: if (&thisversion($fname)==$currentversion) {
4399: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4400: my $root=$1;
4401: my $extension=$2;
4402: symlink($root.'.'.$extension,
4403: $root.'.'.$currentversion.'.'.$extension);
1.102 www 4404: unless ($extension=~/\.meta$/) {
1.178.2.4 albertel 4405: symlink($root.'.'.$extension.'.meta',
4406: $root.'.'.$currentversion.'.'.$extension.'.meta');
1.102 www 4407: }
1.101 www 4408: }
4409: }
4410: }
1.84 albertel 4411: if (-e $fname) {
4412: if (-d $fname) {
4413: $result="directory\n";
4414: } else {
1.161 foxr 4415: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 4416: my $now=time;
1.161 foxr 4417: my $found=&addline($fname,$clientname,$clientip,
4418: "$clientname:$clientip:$now\n");
1.84 albertel 4419: if ($found) { $result="$fname\n"; }
4420: # if they were subscribed to only meta data, delete that
4421: # subscription, when you subscribe to a file you also get
4422: # the metadata
4423: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4424: $fname=~s/\/home\/httpd\/html\/res/raw/;
4425: $fname="http://$thisserver/".$fname;
4426: $result="$fname\n";
4427: }
4428: } else {
4429: $result="not_found\n";
4430: }
4431: } else {
4432: $result="rejected\n";
4433: }
4434: return $result;
4435: }
1.91 albertel 4436:
4437: sub make_passwd_file {
1.98 foxr 4438: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 4439: my $result="ok\n";
4440: if ($umode eq 'krb4' or $umode eq 'krb5') {
4441: {
4442: my $pf = IO::File->new(">$passfilename");
4443: print $pf "$umode:$npass\n";
4444: }
4445: } elsif ($umode eq 'internal') {
4446: my $salt=time;
4447: $salt=substr($salt,6,2);
4448: my $ncpass=crypt($npass,$salt);
4449: {
4450: &Debug("Creating internal auth");
4451: my $pf = IO::File->new(">$passfilename");
4452: print $pf "internal:$ncpass\n";
4453: }
4454: } elsif ($umode eq 'localauth') {
4455: {
4456: my $pf = IO::File->new(">$passfilename");
4457: print $pf "localauth:$npass\n";
4458: }
4459: } elsif ($umode eq 'unix') {
4460: {
4461: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4462: {
4463: &Debug("Executing external: ".$execpath);
1.98 foxr 4464: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 4465: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 4466: print $se "$uname\n";
4467: print $se "$npass\n";
4468: print $se "$npass\n";
1.97 foxr 4469: }
4470: my $useraddok = $?;
4471: if($useraddok > 0) {
4472: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91 albertel 4473: }
4474: my $pf = IO::File->new(">$passfilename");
4475: print $pf "unix:\n";
4476: }
4477: } elsif ($umode eq 'none') {
4478: {
4479: my $pf = IO::File->new(">$passfilename");
4480: print $pf "none:\n";
4481: }
4482: } else {
4483: $result="auth_mode_error\n";
4484: }
4485: return $result;
1.121 albertel 4486: }
4487:
4488: sub sethost {
4489: my ($remotereq) = @_;
4490: my (undef,$hostid)=split(/:/,$remotereq);
4491: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4492: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
4493: $currenthostid=$hostid;
4494: $currentdomainid=$hostdom{$hostid};
4495: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4496: } else {
4497: &logthis("Requested host id $hostid not an alias of ".
4498: $perlvar{'lonHostID'}." refusing connection");
4499: return 'unable_to_set';
4500: }
4501: return 'ok';
4502: }
4503:
4504: sub version {
4505: my ($userinput)=@_;
4506: $remoteVERSION=(split(/:/,$userinput))[1];
4507: return "version:$VERSION";
1.127 albertel 4508: }
1.178.2.1 foxr 4509: ############## >>>>>>>>>>>>>>>>>>>>>>>>>> FUTUREWORK <<<<<<<<<<<<<<<<<<<<<<<<<<<<
1.128 albertel 4510: #There is a copy of this in lonnet.pm
1.178.2.1 foxr 4511: # Can we hoist these lil' things out into common places?
4512: #
1.127 albertel 4513: sub userload {
4514: my $numusers=0;
4515: {
4516: opendir(LONIDS,$perlvar{'lonIDsDir'});
4517: my $filename;
4518: my $curtime=time;
4519: while ($filename=readdir(LONIDS)) {
4520: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 4521: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 4522: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 4523: }
4524: closedir(LONIDS);
4525: }
4526: my $userloadpercent=0;
4527: my $maxuserload=$perlvar{'lonUserLoadLim'};
4528: if ($maxuserload) {
1.129 albertel 4529: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 4530: }
1.130 albertel 4531: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 4532: return $userloadpercent;
1.91 albertel 4533: }
4534:
1.61 harris41 4535: # ----------------------------------- POD (plain old documentation, CPAN style)
4536:
4537: =head1 NAME
4538:
4539: lond - "LON Daemon" Server (port "LOND" 5663)
4540:
4541: =head1 SYNOPSIS
4542:
1.74 harris41 4543: Usage: B<lond>
4544:
4545: Should only be run as user=www. This is a command-line script which
4546: is invoked by B<loncron>. There is no expectation that a typical user
4547: will manually start B<lond> from the command-line. (In other words,
4548: DO NOT START B<lond> YOURSELF.)
1.61 harris41 4549:
4550: =head1 DESCRIPTION
4551:
1.74 harris41 4552: There are two characteristics associated with the running of B<lond>,
4553: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4554: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4555: subscriptions, etc). These are described in two large
4556: sections below.
4557:
4558: B<PROCESS MANAGEMENT>
4559:
1.61 harris41 4560: Preforker - server who forks first. Runs as a daemon. HUPs.
4561: Uses IDEA encryption
4562:
1.74 harris41 4563: B<lond> forks off children processes that correspond to the other servers
4564: in the network. Management of these processes can be done at the
4565: parent process level or the child process level.
4566:
4567: B<logs/lond.log> is the location of log messages.
4568:
4569: The process management is now explained in terms of linux shell commands,
4570: subroutines internal to this code, and signal assignments:
4571:
4572: =over 4
4573:
4574: =item *
4575:
4576: PID is stored in B<logs/lond.pid>
4577:
4578: This is the process id number of the parent B<lond> process.
4579:
4580: =item *
4581:
4582: SIGTERM and SIGINT
4583:
4584: Parent signal assignment:
4585: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4586:
4587: Child signal assignment:
4588: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4589: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4590: to restart a new child.)
4591:
4592: Command-line invocations:
4593: B<kill> B<-s> SIGTERM I<PID>
4594: B<kill> B<-s> SIGINT I<PID>
4595:
4596: Subroutine B<HUNTSMAN>:
4597: This is only invoked for the B<lond> parent I<PID>.
4598: This kills all the children, and then the parent.
4599: The B<lonc.pid> file is cleared.
4600:
4601: =item *
4602:
4603: SIGHUP
4604:
4605: Current bug:
4606: This signal can only be processed the first time
4607: on the parent process. Subsequent SIGHUP signals
4608: have no effect.
4609:
4610: Parent signal assignment:
4611: $SIG{HUP} = \&HUPSMAN;
4612:
4613: Child signal assignment:
4614: none (nothing happens)
4615:
4616: Command-line invocations:
4617: B<kill> B<-s> SIGHUP I<PID>
4618:
4619: Subroutine B<HUPSMAN>:
4620: This is only invoked for the B<lond> parent I<PID>,
4621: This kills all the children, and then the parent.
4622: The B<lond.pid> file is cleared.
4623:
4624: =item *
4625:
4626: SIGUSR1
4627:
4628: Parent signal assignment:
4629: $SIG{USR1} = \&USRMAN;
4630:
4631: Child signal assignment:
4632: $SIG{USR1}= \&logstatus;
4633:
4634: Command-line invocations:
4635: B<kill> B<-s> SIGUSR1 I<PID>
4636:
4637: Subroutine B<USRMAN>:
4638: When invoked for the B<lond> parent I<PID>,
4639: SIGUSR1 is sent to all the children, and the status of
4640: each connection is logged.
1.144 foxr 4641:
4642: =item *
4643:
4644: SIGUSR2
4645:
4646: Parent Signal assignment:
4647: $SIG{USR2} = \&UpdateHosts
4648:
4649: Child signal assignment:
4650: NONE
4651:
1.74 harris41 4652:
4653: =item *
4654:
4655: SIGCHLD
4656:
4657: Parent signal assignment:
4658: $SIG{CHLD} = \&REAPER;
4659:
4660: Child signal assignment:
4661: none
4662:
4663: Command-line invocations:
4664: B<kill> B<-s> SIGCHLD I<PID>
4665:
4666: Subroutine B<REAPER>:
4667: This is only invoked for the B<lond> parent I<PID>.
4668: Information pertaining to the child is removed.
4669: The socket port is cleaned up.
4670:
4671: =back
4672:
4673: B<SERVER-SIDE ACTIVITIES>
4674:
4675: Server-side information can be accepted in an encrypted or non-encrypted
4676: method.
4677:
4678: =over 4
4679:
4680: =item ping
4681:
4682: Query a client in the hosts.tab table; "Are you there?"
4683:
4684: =item pong
4685:
4686: Respond to a ping query.
4687:
4688: =item ekey
4689:
4690: Read in encrypted key, make cipher. Respond with a buildkey.
4691:
4692: =item load
4693:
4694: Respond with CPU load based on a computation upon /proc/loadavg.
4695:
4696: =item currentauth
4697:
4698: Reply with current authentication information (only over an
4699: encrypted channel).
4700:
4701: =item auth
4702:
4703: Only over an encrypted channel, reply as to whether a user's
4704: authentication information can be validated.
4705:
4706: =item passwd
4707:
4708: Allow for a password to be set.
4709:
4710: =item makeuser
4711:
4712: Make a user.
4713:
4714: =item passwd
4715:
4716: Allow for authentication mechanism and password to be changed.
4717:
4718: =item home
1.61 harris41 4719:
1.74 harris41 4720: Respond to a question "are you the home for a given user?"
4721:
4722: =item update
4723:
4724: Update contents of a subscribed resource.
4725:
4726: =item unsubscribe
4727:
4728: The server is unsubscribing from a resource.
4729:
4730: =item subscribe
4731:
4732: The server is subscribing to a resource.
4733:
4734: =item log
4735:
4736: Place in B<logs/lond.log>
4737:
4738: =item put
4739:
4740: stores hash in namespace
4741:
4742: =item rolesput
4743:
4744: put a role into a user's environment
4745:
4746: =item get
4747:
4748: returns hash with keys from array
4749: reference filled in from namespace
4750:
4751: =item eget
4752:
4753: returns hash with keys from array
4754: reference filled in from namesp (encrypts the return communication)
4755:
4756: =item rolesget
4757:
4758: get a role from a user's environment
4759:
4760: =item del
4761:
4762: deletes keys out of array from namespace
4763:
4764: =item keys
4765:
4766: returns namespace keys
4767:
4768: =item dump
4769:
4770: dumps the complete (or key matching regexp) namespace into a hash
4771:
4772: =item store
4773:
4774: stores hash permanently
4775: for this url; hashref needs to be given and should be a \%hashname; the
4776: remaining args aren't required and if they aren't passed or are '' they will
4777: be derived from the ENV
4778:
4779: =item restore
4780:
4781: returns a hash for a given url
4782:
4783: =item querysend
4784:
4785: Tells client about the lonsql process that has been launched in response
4786: to a sent query.
4787:
4788: =item queryreply
4789:
4790: Accept information from lonsql and make appropriate storage in temporary
4791: file space.
4792:
4793: =item idput
4794:
4795: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4796: for each student, defined perhaps by the institutional Registrar.)
4797:
4798: =item idget
4799:
4800: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4801: for each student, defined perhaps by the institutional Registrar.)
4802:
4803: =item tmpput
4804:
4805: Accept and store information in temporary space.
4806:
4807: =item tmpget
4808:
4809: Send along temporarily stored information.
4810:
4811: =item ls
4812:
4813: List part of a user's directory.
4814:
1.135 foxr 4815: =item pushtable
4816:
4817: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4818: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4819: must be restored manually in case of a problem with the new table file.
4820: pushtable requires that the request be encrypted and validated via
4821: ValidateManager. The form of the command is:
4822: enc:pushtable tablename <tablecontents> \n
4823: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4824: cleartext newline.
4825:
1.74 harris41 4826: =item Hanging up (exit or init)
4827:
4828: What to do when a client tells the server that they (the client)
4829: are leaving the network.
4830:
4831: =item unknown command
4832:
4833: If B<lond> is sent an unknown command (not in the list above),
4834: it replys to the client "unknown_cmd".
1.135 foxr 4835:
1.74 harris41 4836:
4837: =item UNKNOWN CLIENT
4838:
4839: If the anti-spoofing algorithm cannot verify the client,
4840: the client is rejected (with a "refused" message sent
4841: to the client, and the connection is closed.
4842:
4843: =back
1.61 harris41 4844:
4845: =head1 PREREQUISITES
4846:
4847: IO::Socket
4848: IO::File
4849: Apache::File
4850: Symbol
4851: POSIX
4852: Crypt::IDEA
4853: LWP::UserAgent()
4854: GDBM_File
4855: Authen::Krb4
1.91 albertel 4856: Authen::Krb5
1.61 harris41 4857:
4858: =head1 COREQUISITES
4859:
4860: =head1 OSNAMES
4861:
4862: linux
4863:
4864: =head1 SCRIPT CATEGORIES
4865:
4866: Server/Process
4867:
4868: =cut
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