Annotation of loncom/lond, revision 1.178.2.8
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.178.2.8! foxr 5: # $Id: lond,v 1.178.2.7 2004/03/08 21:54:05 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:
1.178.2.8! foxr 56: my $VERSION='$Revision: 1.178.2.7 $'; #' 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: #
! 165: # Ties a resource file to a hash. If necessary, an appropriate history
! 166: # log file entry is made as well.
! 167: # This sub factors out common code from the subs that manipulate
! 168: # the various gdbm files that keep keyword value pairs.
! 169: # Parameters:
! 170: # domain - Name of the domain the user is in.
! 171: # user - Name of the 'current user'.
! 172: # namespace - Namespace representing the file to tie.
! 173: # how - What the tie is done to (e.g. GDBM_WRCREAT().
! 174: # loghead - Optional first part of log entry if there may be a
! 175: # history file.
! 176: # what - Optional tail of log entry if there may be a history
! 177: # file.
! 178: # Returns:
! 179: # hash to which the database is tied. It's up to the caller to untie.
! 180: # undef if the has could not be tied.
! 181: #
! 182: sub TieResourceHash {
! 183: my $domain = shift;
! 184: my $user = shift;
! 185: my $namespace = shift;
! 186: my $how = shift;
! 187:
! 188: $namespace=~s/\//\_/g; # / -> _
! 189: $namespace=~s/\W//g; # whitespace eliminated.
! 190: my $proname = propath($domain, $user);
! 191:
! 192: # If this is a namespace for which a history is kept,
! 193: # make the history log entry:
! 194:
! 195:
! 196: unless ($namespace =~/^nohist\_/ && (scalar @_ > 0)) {
! 197: my $hfh = IO::File->new(">>$proname/$namespace.hist");
! 198: if($hfh) {
! 199: my $now = time;
! 200: my $loghead = shift;
! 201: my $what = shift;
! 202: print $hfh "$loghead:$now:$what\n";
! 203: }
! 204: }
! 205: # Tie the database.
! 206:
! 207: my %hash;
! 208: if(tie(%hash, 'GDBM_FILE', "$proname/$namespace.db",
! 209: $how, 0640)) {
! 210: return \%hash;
! 211: }
! 212: else {
! 213: return undef;
! 214: }
! 215:
! 216: }
1.178.2.1 foxr 217:
218: #
219: # Get a Request:
220: # Gets a Request message from the client. The transaction
221: # is defined as a 'line' of text. We remove the new line
222: # from the text line.
223: #
224: sub GetRequest {
225: my $input = <$client>;
226: chomp($input);
227:
228: Debug("Request = $input\n");
229:
230: &status('Processing '.$clientname.':'.$input);
231:
232: return $input;
233: }
234: #
235: # Decipher encoded traffic
236: # Parameters:
237: # input - Encoded data.
238: # Returns:
239: # Decoded data or undef if encryption key was not yet negotiated.
240: # Implicit input:
241: # cipher - This global holds the negotiated encryption key.
242: #
243: sub Decipher {
1.178.2.4 albertel 244: my $input = shift;
245: my $output = '';
1.178.2.1 foxr 246:
247:
1.178.2.4 albertel 248: if($cipher) {
249: my($enc, $enclength, $encinput) = split(/:/, $input);
250: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
251: $output .=
252: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
253: }
254: return substr($output, 0, $enclength);
255: } else {
256: return undef;
257: }
1.178.2.1 foxr 258: }
259:
260: #
261: # Register a command processor. This function is invoked to register a sub
262: # to process a request. Once registered, the ProcessRequest sub can automatically
263: # dispatch requests to an appropriate sub, and do the top level validity checking
264: # as well:
265: # - Is the keyword recognized.
266: # - Is the proper client type attempting the request.
267: # - Is the request encrypted if it has to be.
268: # Parameters:
269: # $RequestName - Name of the request being registered.
270: # This is the command request that will match
271: # against the hash keywords to lookup the information
272: # associated with the dispatch information.
273: # $Procedure - Reference to a sub to call to process the request.
274: # All subs get called as follows:
275: # Procedure($cmd, $tail, $replyfd, $key)
276: # $cmd - the actual keyword that invoked us.
277: # $tail - the tail of the request that invoked us.
278: # $replyfd- File descriptor connected to the client
279: # $MustEncode - True if the request must be encoded to be good.
280: # $ClientOk - True if it's ok for a client to request this.
281: # $ManagerOk - True if it's ok for a manager to request this.
282: # Side effects:
283: # - On success, the Dispatcher hash has an entry added for the key $RequestName
284: # - On failure, the program will die as it's a bad internal bug to try to
285: # register a duplicate command handler.
286: #
287: sub RegisterHandler {
1.178.2.4 albertel 288: my $RequestName = shift;
289: my $Procedure = shift;
290: my $MustEncode = shift;
291: my $ClientOk = shift;
292: my $ManagerOk = shift;
293:
294: # Don't allow duplication#
1.178.2.1 foxr 295:
1.178.2.4 albertel 296: if (defined $Dispatcher{$RequestName}) {
297: die "Attempting to define a duplicate request handler for $RequestName\n";
298: }
299: # Build the client type mask:
300:
301: my $ClientTypeMask = 0;
302: if($ClientOk) {
303: $ClientTypeMask |= $CLIENT_OK;
304: }
305: if($ManagerOk) {
306: $ClientTypeMask |= $MANAGER_OK;
307: }
308:
309: # Enter the hash:
1.178.2.1 foxr 310:
1.178.2.4 albertel 311: my @entry = ($Procedure, $MustEncode, $ClientTypeMask);
1.178.2.1 foxr 312:
1.178.2.4 albertel 313: $Dispatcher{$RequestName} = \@entry;
1.178.2.1 foxr 314:
315:
316: }
317:
318: #--------------------- Request Handlers --------------------------------------------
319: #
320: # By convention each request handler registers itself prior to the sub declaration:
321: #
322:
323: # Handles ping requests.
324: # Parameters:
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: # Implicit Inputs:
329: # $currenthostid - Global variable that carries the name of the host we are
330: # known as.
331: # Returns:
332: # 1 - Ok to continue processing.
333: # 0 - Program should exit.
334: # Side effects:
335: # Reply information is sent to the client.
336:
337: sub PingHandler {
1.178.2.4 albertel 338: my $cmd = shift;
339: my $tail = shift;
340: my $client = shift;
1.178.2.1 foxr 341:
1.178.2.4 albertel 342: Reply( $client,"$currenthostid\n","$cmd:$tail");
1.178.2.1 foxr 343:
1.178.2.4 albertel 344: return 1;
1.178.2.1 foxr 345: }
346: RegisterHandler("ping", \&PingHandler, 0, 1, 1); # Ping unencoded, client or manager.
347: #
348: # Handles pong reequests:
349: # Parameters:
350: # $cmd - the actual keyword that invoked us.
351: # $tail - the tail of the request that invoked us.
352: # $replyfd- File descriptor connected to the client
353: # Implicit Inputs:
354: # $currenthostid - Global variable that carries the name of the host we are
355: # connected to.
356: # Returns:
357: # 1 - Ok to continue processing.
358: # 0 - Program should exit.
359: # Side effects:
360: # Reply information is sent to the client.
361:
362: sub PongHandler {
1.178.2.4 albertel 363: my $cmd = shift;
364: my $tail = shift;
365: my $replyfd = shift;
366:
367: my $reply=&reply("ping",$clientname);
368: Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
369: return 1;
1.178.2.1 foxr 370: }
371: RegisterHandler("pong", \&PongHandler, 0, 1, 1); # Pong unencoded, client or manager
372:
373: #
374: # EstablishKeyHandler:
375: # Called to establish an encrypted session key with the remote client.
376: #
377: # Parameters:
378: # $cmd - the actual keyword that invoked us.
379: # $tail - the tail of the request that invoked us.
380: # $replyfd- File descriptor connected to the client
381: # Implicit Inputs:
382: # $currenthostid - Global variable that carries the name of the host
383: # known as.
384: # $clientname - Global variable that carries the name of the hsot we're connected to.
385: # Returns:
386: # 1 - Ok to continue processing.
387: # 0 - Program should exit.
388: # Implicit Outputs:
389: # Reply information is sent to the client.
390: # $cipher is set with a reference to a new IDEA encryption object.
391: #
392: sub EstablishKeyHandler {
1.178.2.4 albertel 393: my $cmd = shift;
394: my $tail = shift;
395: my $replyfd = shift;
396:
397: my $buildkey=time.$$.int(rand 100000);
398: $buildkey=~tr/1-6/A-F/;
399: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
400: my $key=$currenthostid.$clientname;
401: $key=~tr/a-z/A-Z/;
402: $key=~tr/G-P/0-9/;
403: $key=~tr/Q-Z/0-9/;
404: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
405: $key=substr($key,0,32);
406: my $cipherkey=pack("H32",$key);
407: $cipher=new IDEA $cipherkey;
408: Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1.178.2.1 foxr 409:
1.178.2.4 albertel 410: return 1;
1.178.2.1 foxr 411:
412: }
413: RegisterHandler("ekey", \&EstablishKeyHandler, 0, 1,1);
414:
415: # LoadHandler:
416: # Handler for the load command. Returns the current system load average
417: # to the requestor.
418: #
419: # Parameters:
420: # $cmd - the actual keyword that invoked us.
421: # $tail - the tail of the request that invoked us.
422: # $replyfd- File descriptor connected to the client
423: # Implicit Inputs:
424: # $currenthostid - Global variable that carries the name of the host
425: # known as.
426: # $clientname - Global variable that carries the name of the hsot we're connected to.
427: # Returns:
428: # 1 - Ok to continue processing.
429: # 0 - Program should exit.
430: # Side effects:
431: # Reply information is sent to the client.
432: sub LoadHandler {
1.178.2.4 albertel 433: my $cmd = shift;
434: my $tail = shift;
435: my $replyfd = shift;
1.178.2.1 foxr 436:
437: # Get the load average from /proc/loadavg and calculate it as a percentage of
438: # the allowed load limit as set by the perl global variable lonLoadLim
439:
1.178.2.4 albertel 440: my $loadavg;
441: my $loadfile=IO::File->new('/proc/loadavg');
1.178.2.1 foxr 442:
1.178.2.4 albertel 443: $loadavg=<$loadfile>;
444: $loadavg =~ s/\s.*//g; # Extract the first field only.
1.178.2.1 foxr 445:
1.178.2.4 albertel 446: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1.178.2.1 foxr 447:
1.178.2.4 albertel 448: Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1.178.2.1 foxr 449:
1.178.2.4 albertel 450: return 1;
1.178.2.1 foxr 451: }
452: RegisterHandler("load", \&LoadHandler, 0, 1, 0);
453:
454:
455: #
456: # Process the userload request. This sub returns to the client the current
457: # user load average. It can be invoked either by clients or managers.
458: #
459: # Parameters:
460: # $cmd - the actual keyword that invoked us.
461: # $tail - the tail of the request that invoked us.
462: # $replyfd- File descriptor connected to the client
463: # Implicit Inputs:
464: # $currenthostid - Global variable that carries the name of the host
465: # known as.
466: # $clientname - Global variable that carries the name of the hsot we're connected to.
467: # Returns:
468: # 1 - Ok to continue processing.
469: # 0 - Program should exit
470: # Implicit inputs:
471: # whatever the userload() function requires.
472: # Implicit outputs:
473: # the reply is written to the client.
474: #
475: sub UserLoadHandler {
1.178.2.4 albertel 476: my $cmd = shift;
477: my $tail = shift;
478: my $replyfd = shift;
1.178.2.1 foxr 479:
1.178.2.4 albertel 480: my $userloadpercent=&userload();
481: Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
482:
483: return 1;
1.178.2.1 foxr 484: }
485: RegisterHandler("userload", \&UserLoadHandler, 0, 1, 0);
486:
487: # Process a request for the authorization type of a user:
488: # (userauth).
489: #
490: # Parameters:
491: # $cmd - the actual keyword that invoked us.
492: # $tail - the tail of the request that invoked us.
493: # $replyfd- File descriptor connected to the client
494: # Returns:
495: # 1 - Ok to continue processing.
496: # 0 - Program should exit
497: # Implicit outputs:
498: # The user authorization type is written to the client.
499: #
500: sub UserAuthorizationType {
1.178.2.4 albertel 501: my $cmd = shift;
502: my $tail = shift;
503: my $replyfd = shift;
504:
505: my $userinput = "$cmd:$tail";
506:
507: # Pull the domain and username out of the command tail.
508: # and call GetAuthType to determine the authentication type.
509:
510: my ($udom,$uname)=split(/:/,$tail);
511: my $result = GetAuthType($udom, $uname);
512: if($result eq "nouser") {
513: Failure( $replyfd, "unknown_user\n", $userinput);
514: } else {
1.178.2.8! foxr 515: #
! 516: # We only want to pass the second field from GetAuthType
! 517: # for ^krb.. otherwise we'll be handing out the encrypted
! 518: # password for internals e.g.
! 519: #
! 520: my ($type,$otherinfo) = split(/:/,$result);
! 521: if($type =~ /^krb/) {
! 522: $type = $result;
! 523: }
! 524: Reply( $replyfd, "$type\n", $userinput);
1.178.2.4 albertel 525: }
1.178.2.1 foxr 526:
1.178.2.4 albertel 527: return 1;
1.178.2.1 foxr 528: }
529: RegisterHandler("currentauth", \&UserAuthorizationType, 1, 1, 0);
530: #
531: # Process a request by a manager to push a hosts or domain table
532: # to us. We pick apart the command and pass it on to the subs
533: # that already exist to do this.
534: #
535: # Parameters:
536: # $cmd - the actual keyword that invoked us.
537: # $tail - the tail of the request that invoked us.
538: # $client - File descriptor connected to the client
539: # Returns:
540: # 1 - Ok to continue processing.
541: # 0 - Program should exit
542: # Implicit Output:
543: # a reply is written to the client.
544:
545: sub PushFileHandler {
1.178.2.4 albertel 546: my $cmd = shift;
547: my $tail = shift;
548: my $client = shift;
1.178.2.1 foxr 549:
1.178.2.4 albertel 550: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 551:
1.178.2.4 albertel 552: # At this time we only know that the IP of our partner is a valid manager
553: # the code below is a hook to do further authentication (e.g. to resolve
554: # spoofing).
1.178.2.1 foxr 555:
1.178.2.4 albertel 556: my $cert = GetCertificate($userinput);
557: if(ValidManager($cert)) {
1.178.2.1 foxr 558:
1.178.2.4 albertel 559: # Now presumably we have the bona fides of both the peer host and the
560: # process making the request.
1.178.2.1 foxr 561:
1.178.2.4 albertel 562: my $reply = PushFile($userinput);
563: Reply($client, "$reply\n", $userinput);
1.178.2.1 foxr 564:
1.178.2.4 albertel 565: } else {
566: Failure( $client, "refused\n", $userinput);
567: }
1.178.2.1 foxr 568: }
569: RegisterHandler("pushfile", \&PushFileHandler, 1, 0, 1);
570:
571:
572:
573: # Process a reinit request. Reinit requests that either
574: # lonc or lond be reinitialized so that an updated
575: # host.tab or domain.tab can be processed.
576: #
577: # Parameters:
578: # $cmd - the actual keyword that invoked us.
579: # $tail - the tail of the request that invoked us.
580: # $client - File descriptor connected to the client
581: # Returns:
582: # 1 - Ok to continue processing.
583: # 0 - Program should exit
584: # Implicit output:
585: # a reply is sent to the client.
586: #
587: sub ReinitProcessHandler {
1.178.2.4 albertel 588: my $cmd = shift;
589: my $tail = shift;
590: my $client = shift;
591:
592: my $userinput = "$cmd:$tail";
593:
594: my $cert = GetCertificate($userinput);
595: if(ValidManager($cert)) {
596: chomp($userinput);
597: my $reply = ReinitProcess($userinput);
598: Reply( $client, "$reply\n", $userinput);
599: } else {
600: Failure( $client, "refused\n", $userinput);
601: }
602: return 1;
1.178.2.1 foxr 603: }
604:
605: RegisterHandler("reinit", \&ReinitProcessHandler, 1, 0, 1);
606:
607: # Process the editing script for a table edit operation.
608: # the editing operation must be encrypted and requested by
609: # a manager host.
610: #
611: # Parameters:
612: # $cmd - the actual keyword that invoked us.
613: # $tail - the tail of the request that invoked us.
614: # $client - File descriptor connected to the client
615: # Returns:
616: # 1 - Ok to continue processing.
617: # 0 - Program should exit
618: # Implicit output:
619: # a reply is sent to the client.
620: #
621: sub EditTableHandler {
1.178.2.4 albertel 622: my $command = shift;
623: my $tail = shift;
624: my $client = shift;
625:
626: my $userinput = "$command:$tail";
627:
628: my $cert = GetCertificate($userinput);
629: if(ValidManager($cert)) {
630: my($filetype, $script) = split(/:/, $tail);
631: if (($filetype eq "hosts") ||
632: ($filetype eq "domain")) {
633: if($script ne "") {
634: Reply($client, # BUGBUG - EditFile
635: EditFile($userinput), # could fail.
636: $userinput);
637: } else {
638: Failure($client,"refused\n",$userinput);
639: }
640: } else {
641: Failure($client,"refused\n",$userinput);
642: }
643: } else {
644: Failure($client,"refused\n",$userinput);
645: }
646: return 1;
1.178.2.1 foxr 647: }
648: RegisterHandler("edit", \&EditTableHandler, 1, 0, 1);
649:
650:
651: #
652: # Authenticate a user against the LonCAPA authentication
653: # database. Note that there are several authentication
654: # possibilities:
655: # - unix - The user can be authenticated against the unix
656: # password file.
657: # - internal - The user can be authenticated against a purely
658: # internal per user password file.
659: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
660: # ticket granting authority.
1.178.2.4 albertel 661: # - user - The person tailoring LonCAPA can supply a user authentication
662: # mechanism that is per system.
1.178.2.1 foxr 663: #
664: # Parameters:
665: # $cmd - The command that got us here.
666: # $tail - Tail of the command (remaining parameters).
667: # $client - File descriptor connected to client.
668: # Returns
669: # 0 - Requested to exit, caller should shut down.
670: # 1 - Continue processing.
671: # Implicit inputs:
672: # The authentication systems describe above have their own forms of implicit
673: # input into the authentication process that are described above.
674: #
675: sub AuthenticateHandler {
1.178.2.4 albertel 676: my $cmd = shift;
677: my $tail = shift;
678: my $client = shift;
679:
680: # Regenerate the full input line
681:
682: my $userinput = $cmd.":".$tail;
683:
684: # udom - User's domain.
685: # uname - Username.
686: # upass - User's password.
687:
688: my ($udom,$uname,$upass)=split(/:/,$tail);
689: Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
690: chomp($upass);
691: $upass=unescape($upass);
692:
1.178.2.8! foxr 693: # Fetch the user authentication information:
! 694:
! 695: my $realpasswd = GetAuthType($udom, $uname);
! 696: if($realpasswd ne "nouser") { # nouser means no passwd file.
1.178.2.4 albertel 697: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
698: my $pwdcorrect=0;
699: #
700: # Authenticate against password stored in the internal file.
701: #
702: Debug("Authenticating via $howpwd");
703: if ($howpwd eq 'internal') {
704: &Debug("Internal auth");
705: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
706: #
707: # Authenticate against the unix password file.
708: #
709: } elsif ($howpwd eq 'unix') {
710: &Debug("Unix auth");
711: if((getpwnam($uname))[1] eq "") { #no such user!
712: $pwdcorrect = 0;
713: } else {
714: $contentpwd=(getpwnam($uname))[1];
715: my $pwauth_path="/usr/local/sbin/pwauth";
1.178.2.8! foxr 716: unless ($contentpwd eq 'x') { # Not in shadow file.
1.178.2.4 albertel 717: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
1.178.2.8! foxr 718: } elsif (-e $pwauth_path) { # In shadow file so
! 719: open PWAUTH, "|$pwauth_path" or # use external program
1.178.2.4 albertel 720: die "Cannot invoke authentication";
721: print PWAUTH "$uname\n$upass\n";
722: close PWAUTH;
723: $pwdcorrect=!$?;
724: }
725: }
726: #
727: # Authenticate against a Kerberos 4 server:
728: #
729: } elsif ($howpwd eq 'krb4') {
730: my $null=pack("C",0);
731: unless ($upass=~/$null/) {
732: my $krb4_error = &Authen::Krb4::get_pw_in_tkt($uname,
733: "",
734: $contentpwd,
735: 'krbtgt',
736: $contentpwd,
737: 1,
738: $upass);
739: if (!$krb4_error) {
740: $pwdcorrect = 1;
741: } else {
742: $pwdcorrect=0;
743: # log error if it is not a bad password
744: if ($krb4_error != 62) {
745: &logthis('krb4:'.$uname.','.$contentpwd.','.
746: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
747: }
748: }
749: }
750: #
751: # Authenticate against a Kerberos 5 server:
752: #
753: } elsif ($howpwd eq 'krb5') {
754: my $null=pack("C",0);
755: unless ($upass=~/$null/) {
756: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
757: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
758: my $krbserver=&Authen::Krb5::parse_name($krbservice);
759: my $credentials=&Authen::Krb5::cc_default();
760: $credentials->initialize($krbclient);
761: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
762: $krbserver,
763: $upass,
764: $credentials);
765: $pwdcorrect = ($krbreturn == 1);
766: } else {
767: $pwdcorrect=0;
768: }
769: #
770: # Finally, the user may have written in an authentication module.
771: # in that case, if requested, authenticate against it.
772: #
773: } elsif ($howpwd eq 'localauth') {
774: $pwdcorrect=&localauth::localauth($uname,$upass,$contentpwd);
775: }
776: #
777: # Successfully authorized.
778: #
779: if ($pwdcorrect) {
780: Reply( $client, "authorized\n", $userinput);
781: #
782: # Bad credentials: Failed to authorize
783: #
784: } else {
785: Failure( $client, "non_authorized\n", $userinput);
786: }
1.178.2.8! foxr 787: # Used to be unknown_user but that allows crackers to
! 788: # distinguish between bad username and bad password so...
! 789: #
1.178.2.4 albertel 790: } else {
1.178.2.8! foxr 791: Failure( $client, "non_authorized\n", $userinput);
1.178.2.4 albertel 792: }
793: return 1;
1.178.2.1 foxr 794: }
795: RegisterHandler("auth", \&AuthenticateHandler, 1, 1, 0);
796:
797: #
798: # Change a user's password. Note that this function is complicated by
799: # the fact that a user may be authenticated in more than one way:
800: # At present, we are not able to change the password for all types of
801: # authentication methods. Only for:
802: # unix - unix password or shadow passoword style authentication.
803: # local - Locally written authentication mechanism.
804: # For now, kerb4 and kerb5 password changes are not supported and result
805: # in an error.
806: # FUTURE WORK:
807: # Support kerberos passwd changes?
808: # Parameters:
809: # $cmd - The command that got us here.
810: # $tail - Tail of the command (remaining parameters).
811: # $client - File descriptor connected to client.
812: # Returns
813: # 0 - Requested to exit, caller should shut down.
814: # 1 - Continue processing.
815: # Implicit inputs:
816: # The authentication systems describe above have their own forms of implicit
817: # input into the authentication process that are described above.
818: sub ChangePasswordHandler {
1.178.2.4 albertel 819: my $cmd = shift;
820: my $tail = shift;
821: my $client = shift;
822:
823: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
824:
825: #
826: # udom - user's domain.
827: # uname - Username.
828: # upass - Current password.
829: # npass - New password.
830:
831: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
832: chomp($npass);
833: $upass=&unescape($upass);
834: $npass=&unescape($npass);
835: &Debug("Trying to change password for $uname");
1.178.2.8! foxr 836: my $realpasswd = GetAuthType($udom, $uname);
! 837: if ($realpasswd ne "nouser") {
1.178.2.4 albertel 838: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
839: if ($howpwd eq 'internal') {
840: &Debug("internal auth");
841: if (crypt($upass,$contentpwd) eq $contentpwd) {
842: my $salt=time;
843: $salt=substr($salt,6,2);
844: my $ncpass=crypt($npass,$salt);
1.178.2.8! foxr 845: if(RewritePwFile($udom, $uname, "internal:$ncpass")) {
! 846: &logthis("Result of password change for "
! 847: ."$uname: pwchange_success");
! 848: Reply($client, "ok\n", $userinput);
! 849: } else {
! 850: &logthis("Unable to open $uname passwd "
! 851: ."to change password");
! 852: Failure( $client, "non_authorized\n",$userinput);
! 853: }
1.178.2.4 albertel 854: } else {
855: Failure($client, "non_authorized\n", $userinput);
856: }
857: } elsif ($howpwd eq 'unix') {
858: # Unix means we have to access /etc/password
859: # one way or another.
860: # First: Make sure the current password is
861: # correct
862: &Debug("auth is unix");
863: $contentpwd=(getpwnam($uname))[1];
864: my $pwdcorrect = "0";
865: my $pwauth_path="/usr/local/sbin/pwauth";
866: unless ($contentpwd eq 'x') {
867: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
868: } elsif (-e $pwauth_path) {
869: open PWAUTH, "|$pwauth_path" or
870: die "Cannot invoke authentication";
871: print PWAUTH "$uname\n$upass\n";
872: close PWAUTH;
873: &Debug("exited pwauth with $? ($uname,$upass) ");
874: $pwdcorrect=($? == 0);
875: }
876: if ($pwdcorrect) {
877: my $execdir=$perlvar{'lonDaemons'};
878: &Debug("Opening lcpasswd pipeline");
879: my $pf = IO::File->new("|$execdir/lcpasswd > "
880: ."$perlvar{'lonDaemons'}"
881: ."/logs/lcpasswd.log");
882: print $pf "$uname\n$npass\n$npass\n";
883: close $pf;
884: my $err = $?;
885: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
886: &logthis("Result of password change for $uname: ".
887: &lcpasswdstrerror($?));
888: Reply($client, "$result\n", $userinput);
889: } else {
890: Reply($client, "non_authorized\n", $userinput);
891: }
892: } else {
1.178.2.8! foxr 893: # this just means that the current password mode is not
! 894: # one we know how to change (e.g the kerberos auth modes or
! 895: # locally written auth handler).
! 896: #
1.178.2.4 albertel 897: Reply( $client, "auth_mode_error\n", $userinput);
898: }
899: } else {
1.178.2.8! foxr 900: # used to be unknonw user but that gives out too much info..
! 901: # so make it the same as if the initial passwd was bad.
! 902: #
! 903: Reply( $client, "non_authorized\n", $userinput);
1.178.2.4 albertel 904: }
905: return 1;
1.178.2.1 foxr 906: }
907: RegisterHandler("passwd", \&ChangePasswordHandler, 1, 1, 0);
908:
909: #
910: # Create a new user. User in this case means a lon-capa user.
911: # The user must either already exist in some authentication realm
912: # like kerberos or the /etc/passwd. If not, a user completely local to
913: # this loncapa system is created.
914: #
915: # Parameters:
916: # $cmd - The command that got us here.
917: # $tail - Tail of the command (remaining parameters).
918: # $client - File descriptor connected to client.
919: # Returns
920: # 0 - Requested to exit, caller should shut down.
921: # 1 - Continue processing.
922: # Implicit inputs:
923: # The authentication systems describe above have their own forms of implicit
924: # input into the authentication process that are described above.
925: sub AddUserHandler {
1.178.2.4 albertel 926: my $cmd = shift;
927: my $tail = shift;
928: my $client = shift;
929:
930: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1.178.2.8! foxr 931: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
! 932:
1.178.2.4 albertel 933: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1.178.2.8! foxr 934:
! 935:
! 936: if($udom eq $currentdomainid) { # Reject new users for other domains...
! 937:
! 938: my $oldumask=umask(0077);
! 939: chomp($npass);
! 940: $npass=&unescape($npass);
! 941: my $passfilename = PasswordPath($udom, $uname);
! 942: &Debug("Password file created will be:".$passfilename);
! 943: if (-e $passfilename) {
! 944: Failure( $client, "already_exists\n", $userinput);
! 945: } else {
! 946: my @fpparts=split(/\//,$passfilename);
! 947: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
! 948: my $fperror='';
! 949: for (my $i=3;$i<= ($#fpparts-1);$i++) {
! 950: $fpnow.='/'.$fpparts[$i];
! 951: unless (-e $fpnow) {
! 952: unless (mkdir($fpnow,0777)) {
! 953: $fperror="error: ".($!+0)." mkdir failed while attempting "
! 954: ."makeuser";
! 955: }
1.178.2.4 albertel 956: }
957: }
1.178.2.8! foxr 958: unless ($fperror) {
! 959: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
! 960: Reply($client, $result, $userinput); #BUGBUG - could be fail
! 961: } else {
! 962: Failure($client, "$fperror\n", $userinput);
! 963: }
1.178.2.4 albertel 964: }
1.178.2.8! foxr 965: umask($oldumask);
! 966: } else {
! 967: Failure($client, "not_right_domain\n",
! 968: $userinput); # Even if we are multihomed.
! 969:
1.178.2.4 albertel 970: }
971: return 1;
1.178.2.1 foxr 972:
973: }
974: RegisterHandler("makeuser", \&AddUserHandler, 1, 1, 0);
975:
976: #
977: # Change the authentication method of a user. Note that this may
978: # also implicitly change the user's password if, for example, the user is
979: # joining an existing authentication realm. Known authentication realms at
980: # this time are:
981: # internal - Purely internal password file (only loncapa knows this user)
982: # local - Institutionally written authentication module.
983: # unix - Unix user (/etc/passwd with or without /etc/shadow).
984: # kerb4 - kerberos version 4
985: # kerb5 - kerberos version 5
986: #
987: # Parameters:
988: # $cmd - The command that got us here.
989: # $tail - Tail of the command (remaining parameters).
990: # $client - File descriptor connected to client.
991: # Returns
992: # 0 - Requested to exit, caller should shut down.
993: # 1 - Continue processing.
994: # Implicit inputs:
995: # The authentication systems describe above have their own forms of implicit
996: # input into the authentication process that are described above.
997: #
998: sub ChangeAuthenticationHandler {
1.178.2.4 albertel 999: my $cmd = shift;
1000: my $tail = shift;
1001: my $client = shift;
1002:
1003: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1004:
1005: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1006: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1007: if ($udom ne $currentdomainid) {
1008: Failure( $client, "not_right_domain\n", $client);
1009: } else {
1.178.2.8! foxr 1010:
! 1011: chomp($npass);
! 1012:
! 1013: $npass=&unescape($npass);
! 1014: my $passfilename = PasswordPath($udom, $uname);
! 1015: if ($passfilename) { # Not allowed to create a new user!!
! 1016: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
! 1017: Reply($client, $result, $userinput);
! 1018: } else {
! 1019: Failure($client, "non_authorized", $userinput); # Fail the user now.
! 1020: }
1.178.2.4 albertel 1021: }
1022: return 1;
1.178.2.1 foxr 1023: }
1024: RegisterHandler("changeuserauth", \&ChangeAuthenticationHandler, 1,1, 0);
1025:
1026: #
1027: # Determines if this is the home server for a user. The home server
1028: # for a user will have his/her lon-capa passwd file. Therefore all we need
1029: # to do is determine if this file exists.
1030: #
1031: # Parameters:
1032: # $cmd - The command that got us here.
1033: # $tail - Tail of the command (remaining parameters).
1034: # $client - File descriptor connected to client.
1035: # Returns
1036: # 0 - Requested to exit, caller should shut down.
1037: # 1 - Continue processing.
1038: # Implicit inputs:
1039: # The authentication systems describe above have their own forms of implicit
1040: # input into the authentication process that are described above.
1041: #
1042: sub IsHomeHandler {
1.178.2.4 albertel 1043: my $cmd = shift;
1044: my $tail = shift;
1045: my $client = shift;
1046:
1047: my $userinput = "$cmd:$tail";
1048:
1049: my ($udom,$uname)=split(/:/,$tail);
1050: chomp($uname);
1.178.2.8! foxr 1051: my $passfile = PasswordPath($udom, $uname);
! 1052: if($passfile) {
1.178.2.4 albertel 1053: Reply( $client, "found\n", $userinput);
1054: } else {
1055: Failure($client, "not_found\n", $userinput);
1056: }
1057: return 1;
1.178.2.1 foxr 1058: }
1059: RegisterHandler("home", \&IsHomeHandler, 0,1,0);
1060: #
1061: # Process an update request for a resource?? I think what's going on here is
1062: # that a resource has been modified that we hold a subscription to.
1063: # If the resource is not local, then we must update, or at least invalidate our
1064: # cached copy of the resource.
1065: # FUTURE WORK:
1066: # I need to look at this logic carefully. My druthers would be to follow
1067: # typical caching logic, and simple invalidate the cache, drop any subscription
1068: # an let the next fetch start the ball rolling again... however that may
1069: # actually be more difficult than it looks given the complex web of
1070: # proxy servers.
1071: # Parameters:
1072: # $cmd - The command that got us here.
1073: # $tail - Tail of the command (remaining parameters).
1074: # $client - File descriptor connected to client.
1075: # Returns
1076: # 0 - Requested to exit, caller should shut down.
1077: # 1 - Continue processing.
1078: # Implicit inputs:
1079: # The authentication systems describe above have their own forms of implicit
1080: # input into the authentication process that are described above.
1081: #
1082: sub UpdateResourceHandler {
1.178.2.4 albertel 1083: my $cmd = shift;
1084: my $tail = shift;
1085: my $client = shift;
1086:
1087: my $userinput = "$cmd:$tail";
1088:
1089: my $fname=$tail;
1090: my $ownership=ishome($fname);
1091: if ($ownership eq 'not_owner') {
1092: if (-e $fname) {
1093: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1094: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1095: my $now=time;
1096: my $since=$now-$atime;
1097: if ($since>$perlvar{'lonExpire'}) {
1098: my $reply=&reply("unsub:$fname","$clientname");
1099: unlink("$fname");
1100: } else {
1101: my $transname="$fname.in.transfer";
1102: my $remoteurl=&reply("sub:$fname","$clientname");
1103: my $response;
1104: alarm(120);
1105: {
1106: my $ua=new LWP::UserAgent;
1107: my $request=new HTTP::Request('GET',"$remoteurl");
1108: $response=$ua->request($request,$transname);
1109: }
1110: alarm(0);
1111: if ($response->is_error()) {
1112: unlink($transname);
1113: my $message=$response->status_line;
1114: &logthis("LWP GET: $message for $fname ($remoteurl)");
1115: } else {
1116: if ($remoteurl!~/\.meta$/) {
1117: alarm(120);
1118: {
1119: my $ua=new LWP::UserAgent;
1120: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1121: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1122: if ($mresponse->is_error()) {
1123: unlink($fname.'.meta');
1124: }
1125: }
1126: alarm(0);
1127: }
1128: rename($transname,$fname);
1129: }
1130: }
1131: Reply( $client, "ok\n", $userinput);
1132: } else {
1133: Failure($client, "not_found\n", $userinput);
1134: }
1135: } else {
1136: Failure($client, "rejected\n", $userinput);
1137: }
1138: return 1;
1.178.2.1 foxr 1139: }
1140: RegisterHandler("update", \&UpdateResourceHandler, 0 ,1, 0);
1141:
1142: #
1143: # Fetch a user file from a remote server:
1144: # Parameters:
1145: # $cmd - The command that got us here.
1146: # $tail - Tail of the command (remaining parameters).
1147: # $client - File descriptor connected to client.
1148: # Returns
1149: # 0 - Requested to exit, caller should shut down.
1150: # 1 - Continue processing.
1151: #
1152: sub FetchUserFileHandler {
1.178.2.4 albertel 1153: my $cmd = shift;
1154: my $tail = shift;
1155: my $client = shift;
1156:
1157: my $userinput = "$cmd:$tail";
1158: my $fname = $tail;
1159: my ($udom,$uname,$ufile)=split(/\//,$fname);
1160: my $udir=propath($udom,$uname).'/userfiles';
1161: unless (-e $udir) {
1162: mkdir($udir,0770);
1163: }
1164: if (-e $udir) {
1165: $ufile=~s/^[\.\~]+//;
1166: $ufile=~s/\///g;
1167: my $destname=$udir.'/'.$ufile;
1168: my $transname=$udir.'/'.$ufile.'.in.transit';
1169: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1170: my $response;
1171: alarm(120);
1172: {
1173: my $ua=new LWP::UserAgent;
1174: my $request=new HTTP::Request('GET',"$remoteurl");
1175: $response=$ua->request($request,$transname);
1176: }
1177: alarm(0);
1178: if ($response->is_error()) {
1179: unlink($transname);
1180: my $message=$response->status_line;
1181: &logthis("LWP GET: $message for $fname ($remoteurl)");
1182: Failure($client, "failed\n", $userinput);
1183: } else {
1184: if (!rename($transname,$destname)) {
1185: &logthis("Unable to move $transname to $destname");
1186: unlink($transname);
1187: Failure($client, "failed\n", $userinput);
1188: } else {
1189: Reply($client, "ok\n", $userinput);
1190: }
1191: }
1192: } else {
1193: Failure($client, "not_home\n", $userinput);
1194: }
1195: return 1;
1.178.2.1 foxr 1196: }
1197: RegisterHandler("fetchuserfile", \&FetchUserFileHandler, 0, 1, 0);
1198: #
1199: # Authenticate access to a user file. Question? The token for athentication
1200: # is allowed to be sent as cleartext is this really what we want? This token
1.178.2.8! foxr 1201: # represents the user's session id. Once it is forged does this allow too much
! 1202: # access??
1.178.2.1 foxr 1203: #
1204: # Parameters:
1205: # $cmd - The command that got us here.
1206: # $tail - Tail of the command (remaining parameters).
1207: # $client - File descriptor connected to client.
1208: # Returns
1209: # 0 - Requested to exit, caller should shut down.
1210: # 1 - Continue processing.
1211: sub AuthenticateUserFileAccess {
1.178.2.8! foxr 1212: my $cmd = shift;
! 1213: my $tail = shift;
! 1214: my $client = shift;
1.178.2.4 albertel 1215: my $userinput = "$cmd:$tail";
1216:
1217: my ($fname,$session)=split(/:/,$tail);
1218: chomp($session);
1219: my $reply='non_auth';
1220: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.$session.'.id')) {
1221: while (my $line=<ENVIN>) {
1222: if ($line=~/userfile\.$fname\=/) {
1223: $reply='ok';
1224: }
1225: }
1226: close(ENVIN);
1227: Reply($client, $reply."\n", $userinput);
1228: } else {
1229: Failure($client, "invalid_token\n", $userinput);
1230: }
1231: return 1;
1.178.2.1 foxr 1232:
1233: }
1234: RegisterHandler("tokenauthuserfile", \&AuthenticateUserFileAccess, 0, 1, 0);
1235: #
1236: # Unsubscribe from a resource.
1237: #
1238: # Parameters:
1239: # $cmd - The command that got us here.
1240: # $tail - Tail of the command (remaining parameters).
1241: # $client - File descriptor connected to client.
1242: # Returns
1243: # 0 - Requested to exit, caller should shut down.
1244: # 1 - Continue processing.
1245: #
1246: sub UnsubscribeHandler {
1.178.2.4 albertel 1247: my $cmd = shift;
1248: my $tail = shift;
1249: my $client = shift;
1250: my $userinput= "$cmd:$tail";
1251:
1252: my $fname = $tail;
1253: if (-e $fname) {
1254: Reply($client, &unsub($client,$fname,$clientip), $userinput);
1255: } else {
1256: Failure($client, "not_found\n", $userinput);
1257: }
1258: return 1;
1.178.2.1 foxr 1259: }
1260: RegisterHandler("unusb", \&UnsubscribeHandler, 0, 1, 0);
1261:
1262: # Subscribe to a resource.
1263: #
1264: # Parameters:
1265: # $cmd - The command that got us here.
1266: # $tail - Tail of the command (remaining parameters).
1267: # $client - File descriptor connected to client.
1268: # Returns
1269: # 0 - Requested to exit, caller should shut down.
1270: # 1 - Continue processing.
1271: #
1272: sub SubscribeHandler {
1.178.2.4 albertel 1273: my $cmd = shift;
1274: my $tail = shift;
1275: my $client = shift;
1276: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 1277:
1.178.2.4 albertel 1278: Reply( $client, &subscribe($userinput,$clientip), $userinput);
1279:
1280: return 1;
1.178.2.1 foxr 1281: }
1282: RegisterHandler("sub", \&SubscribeHandler, 0, 1, 0);
1283:
1284: #
1285: # Determine the version of a resource (?) Or is it return
1286: # the top version of the resource? Not yet clear from the
1287: # code in currentversion.
1288: #
1289: # Parameters:
1290: # $cmd - The command that got us here.
1291: # $tail - Tail of the command (remaining parameters).
1292: # $client - File descriptor connected to client.
1293: # Returns
1294: # 0 - Requested to exit, caller should shut down.
1295: # 1 - Continue processing.
1296: #
1297: sub CurrentVersionHandler {
1.178.2.4 albertel 1298: my $cmd = shift;
1299: my $tail = shift;
1300: my $client = shift;
1301: my $userinput= "$cmd:$tail";
1302:
1303: my $fname = $tail;
1304: Reply( $client, ¤tversion($fname)."\n", $userinput);
1305: return 1;
1.178.2.1 foxr 1306:
1307: }
1308: RegisterHandler("currentversion", \&CurrentVersionHandler, 0, 1, 0);
1309:
1310:
1311: # Make an entry in a user's activity log.
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 ActivityLogEntryHandler {
1.178.2.4 albertel 1322: my $cmd = shift;
1323: my $tail = shift;
1324: my $client = shift;
1325: my $userinput= "$cmd:$tail";
1326:
1327: my ($udom,$uname,$what)=split(/:/,$tail);
1328: chomp($what);
1329: my $proname=propath($udom,$uname);
1330: my $now=time;
1331: my $hfh;
1332: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1333: print $hfh "$now:$clientname:$what\n";
1334: Reply( $client, "ok\n", $userinput);
1335: } else {
1.178.2.8! foxr 1336: Failure($client, "error: ".($!+0)." IO::File->new Failed "
1.178.2.4 albertel 1337: ."while attempting log\n",
1338: $userinput);
1339: }
1.178.2.1 foxr 1340:
1.178.2.4 albertel 1341: return 1;
1.178.2.1 foxr 1342: }
1343: RegisterHandler("log", \&ActivityLogEntryHandler, 0, 1, 0);
1344: #
1345: # Put a namespace entry in a user profile hash.
1346: # My druthers would be for this to be an encrypted interaction too.
1347: # anything that might be an inadvertent covert channel about either
1348: # user authentication or user personal information....
1349: #
1350: # Parameters:
1351: # $cmd - The command that got us here.
1352: # $tail - Tail of the command (remaining parameters).
1353: # $client - File descriptor connected to client.
1354: # Returns
1355: # 0 - Requested to exit, caller should shut down.
1356: # 1 - Continue processing.
1357: #
1358: sub PutUserProfileEntry {
1.178.2.4 albertel 1359: my $cmd = shift;
1360: my $tail = shift;
1361: my $client = shift;
1362: my $userinput = "$cmd:$tail";
1363:
1364: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
1365: if ($namespace ne 'roles') {
1.178.2.8! foxr 1366: chomp($what);
! 1367: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1368: &GDBM_WRCREAT(),"P",$what);
! 1369: if($hashref) {
! 1370: my @pairs=split(/\&/,$what);
! 1371: foreach my $pair (@pairs) {
! 1372: my ($key,$value)=split(/=/,$pair);
! 1373: $hashref->{$key}=$value;
! 1374: }
! 1375: if (untie(%$hashref)) {
! 1376: Reply( $client, "ok\n", $userinput);
! 1377: } else {
! 1378: Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
! 1379: "while attempting put\n",
! 1380: $userinput);
! 1381: }
! 1382: } else {
! 1383: Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
! 1384: "while attempting put\n", $userinput);
! 1385: }
! 1386: } else {
! 1387: Failure( $client, "refused\n", $userinput);
! 1388: }
! 1389:
! 1390: return 1;
1.178.2.1 foxr 1391: }
1392: RegisterHandler("put", \&PutUserProfileEntry, 0, 1, 0);
1393:
1394: #
1395: # Increment a profile entry in the user history file.
1396: # The history contains keyword value pairs. In this case,
1397: # The value itself is a pair of numbers. The first, the current value
1398: # the second an increment that this function applies to the current
1399: # value.
1400: #
1401: # Parameters:
1402: # $cmd - The command that got us here.
1403: # $tail - Tail of the command (remaining parameters).
1404: # $client - File descriptor connected to client.
1405: # Returns
1406: # 0 - Requested to exit, caller should shut down.
1407: # 1 - Continue processing.
1408: #
1409: sub IncrementUserValueHandler {
1.178.2.4 albertel 1410: my $cmd = shift;
1411: my $tail = shift;
1412: my $client = shift;
1.178.2.7 foxr 1413: my $userinput = "$cmd:$tail";
1.178.2.4 albertel 1414:
1415: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
1416: if ($namespace ne 'roles') {
1.178.2.8! foxr 1417: chomp($what);
! 1418: my $hashref = TieResourceHash($udom, $uname,
! 1419: $namespace, &GDBM_WRCREAT(),
! 1420: "P",$what);
! 1421: if ($hashref) {
! 1422: my @pairs=split(/\&/,$what);
! 1423: foreach my $pair (@pairs) {
! 1424: my ($key,$value)=split(/=/,$pair);
! 1425: # We could check that we have a number...
! 1426: if (! defined($value) || $value eq '') {
! 1427: $value = 1;
! 1428: }
! 1429: $hashref->{$key}+=$value;
! 1430: }
! 1431: if (untie(%$hashref)) {
! 1432: Reply( $client, "ok\n", $userinput);
! 1433: } else {
! 1434: Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
! 1435: "while attempting inc\n", $userinput);
! 1436: }
! 1437: } else {
! 1438: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
! 1439: "while attempting inc\n", $userinput);
! 1440: }
! 1441: } else {
! 1442: Failure($client, "refused\n", $userinput);
! 1443: }
! 1444:
1.178.2.4 albertel 1445: return 1;
1.178.2.1 foxr 1446: }
1447: RegisterHandler("inc", \&IncrementUserValueHandler, 0, 1, 0);
1448: #
1449: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
1450: # Each 'role' a user has implies a set of permissions. Adding a new role
1451: # for a person grants the permissions packaged with that role
1452: # to that user when the role is selected.
1453: #
1454: # Parameters:
1455: # $cmd - The command string (rolesput).
1456: # $tail - The remainder of the request line. For rolesput this
1457: # consists of a colon separated list that contains:
1458: # The domain and user that is granting the role (logged).
1459: # The domain and user that is getting the role.
1460: # The roles being granted as a set of & separated pairs.
1461: # each pair a key value pair.
1462: # $client - File descriptor connected to the client.
1463: # Returns:
1464: # 0 - If the daemon should exit
1465: # 1 - To continue processing.
1466: #
1467: #
1468: sub RolesPutHandler {
1.178.2.4 albertel 1469: my $cmd = shift;
1470: my $tail = shift;
1471: my $client = shift;
1472: my $userinput = "$cmd:$tail";
1473:
1474: my ($exedom,$exeuser,$udom,$uname,$what) =split(/:/,$tail);
1475: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
1476: "what = ".$what);
1477: my $namespace='roles';
1478: chomp($what);
1.178.2.8! foxr 1479: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1480: &GDBM_WRCREAT(), "P",
! 1481: "$exedom:$exeuser:$what");
1.178.2.4 albertel 1482: #
1483: # Log the attempt to set a role. The {}'s here ensure that the file
1484: # handle is open for the minimal amount of time. Since the flush
1485: # is done on close this improves the chances the log will be an un-
1486: # corrupted ordered thing.
1.178.2.8! foxr 1487: if ($hashref) {
! 1488: my @pairs=split(/\&/,$what);
1.178.2.4 albertel 1489: foreach my $pair (@pairs) {
1490: my ($key,$value)=split(/=/,$pair);
1.178.2.8! foxr 1491: &ManagePermissions($key, $udom, $uname,
! 1492: &GetAuthType( $udom, $uname));
! 1493: $hashref->{$key}=$value;
1.178.2.4 albertel 1494: }
1.178.2.8! foxr 1495: if (untie($hashref)) {
1.178.2.4 albertel 1496: Reply($client, "ok\n", $userinput);
1497: } else {
1498: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1499: "while attempting rolesput\n", $userinput);
1500: }
1501: } else {
1502: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1503: "while attempting rolesput\n", $userinput);
1504: }
1505: return 1;
1.178.2.1 foxr 1506: }
1507: RegisterHandler("rolesput", \&RolesPutHandler, 1,1,0); # Encoded client only.
1508: #
1509: # Deletes (removes) a role for a user. This is equivalent to removing
1510: # a permissions package associated with the role from the user's profile.
1511: #
1512: # Parameters:
1513: # $cmd - The command (rolesdel)
1514: # $tail - The remainder of the request line. This consists
1515: # of:
1516: # The domain and user requesting the change (logged)
1517: # The domain and user being changed.
1518: # The roles being revoked. These are shipped to us
1519: # as a bunch of & separated role name keywords.
1520: # $client - The file handle open on the client.
1521: # Returns:
1522: # 1 - Continue processing
1523: # 0 - Exit.
1524: #
1525: sub RolesDeleteHandler {
1.178.2.4 albertel 1526: my $cmd = shift;
1527: my $tail = shift;
1528: my $client = shift;
1529: my $userinput = "$cmd:$tail";
1530:
1531: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
1532: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
1533: "what = ".$what);
1534: my $namespace='roles';
1535: chomp($what);
1.178.2.8! foxr 1536: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1537: &GDBM_WRCREAT(), "D",
! 1538: "$exedom:$exeuser:$what");
! 1539:
! 1540: if ($hashref) {
! 1541: my @rolekeys=split(/\&/,$what);
! 1542:
! 1543: foreach my $key (@rolekeys) {
! 1544: delete $hashref->{$key};
! 1545: }
! 1546: if (untie(%$hashref)) {
! 1547: Reply($client, "ok\n", $userinput);
1.178.2.4 albertel 1548: } else {
1.178.2.8! foxr 1549: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
! 1550: "while attempting rolesdel\n", $userinput);
1.178.2.4 albertel 1551: }
1.178.2.8! foxr 1552: } else {
! 1553: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.178.2.4 albertel 1554: "while attempting rolesdel\n", $userinput);
1.178.2.8! foxr 1555: }
1.178.2.4 albertel 1556:
1557: return 1;
1.178.2.1 foxr 1558: }
1559: RegisterHandler("rolesdel", \&RolesDeleteHandler, 1,1, 0); # Encoded client only
1560:
1561: # Unencrypted get from a user's profile database. See
1562: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
1563: # This function retrieves a keyed item from a specific named database in the
1564: # user's directory.
1565: #
1566: # Parameters:
1567: # $cmd - Command request keyword (get).
1568: # $tail - Tail of the command. This is a colon separated list
1569: # consisting of the domain and username that uniquely
1570: # identifies the profile,
1571: # The 'namespace' which selects the gdbm file to
1572: # do the lookup in,
1573: # & separated list of keys to lookup. Note that
1574: # the values are returned as an & separated list too.
1575: # $client - File descriptor open on the client.
1576: # Returns:
1577: # 1 - Continue processing.
1578: # 0 - Exit.
1579: #
1580: sub GetProfileEntry {
1.178.2.4 albertel 1581: my $cmd = shift;
1582: my $tail = shift;
1583: my $client = shift;
1584: my $userinput= "$cmd:$tail";
1585:
1586: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1587: chomp($what);
1.178.2.8! foxr 1588: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1589: &GDBM_READER());
! 1590: if ($hashref) {
! 1591: my @queries=split(/\&/,$what);
! 1592: my $qresult='';
! 1593:
1.178.2.4 albertel 1594: for (my $i=0;$i<=$#queries;$i++) {
1.178.2.8! foxr 1595: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1.178.2.4 albertel 1596: }
1.178.2.8! foxr 1597: $qresult=~s/\&$//; # Remove trailing & from last lookup.
! 1598: if (untie(%$hashref)) {
1.178.2.4 albertel 1599: Reply($client, "$qresult\n", $userinput);
1600: } else {
1601: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1602: "while attempting get\n", $userinput);
1603: }
1604: } else {
1605: if ($!+0 == 2) { # +0 coerces errno -> number 2 is ENOENT
1606: Failure($client, "error:No such file or ".
1607: "GDBM reported bad block error\n", $userinput);
1608: } else { # Some other undifferentiated err.
1609: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1610: "while attempting get\n", $userinput);
1611: }
1612: }
1613: return 1;
1.178.2.1 foxr 1614: }
1615: RegisterHandler("get", \&GetProfileEntry, 0,1,0);
1616: #
1617: # Process the encrypted get request. Note that the request is sent
1618: # in clear, but the reply is encrypted. This is a small covert channel:
1619: # information about the sensitive keys is given to the snooper. Just not
1620: # information about the values of the sensitive key. Hmm if I wanted to
1621: # know these I'd snoop for the egets. Get the profile item names from them
1622: # and then issue a get for them since there's no enforcement of the
1623: # requirement of an encrypted get for particular profile items. If I
1624: # were re-doing this, I'd force the request to be encrypted as well as the
1625: # reply. I'd also just enforce encrypted transactions for all gets since
1626: # that would prevent any covert channel snooping.
1627: #
1628: # Parameters:
1629: # $cmd - Command keyword of request (eget).
1630: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
1631: # $client - File open on the client.
1632: # Returns:
1633: # 1 - Continue processing
1634: # 0 - server should exit.
1635: sub GetProfileEntryEncrypted {
1.178.2.4 albertel 1636: my $cmd = shift;
1637: my $tail = shift;
1638: my $client = shift;
1639: my $userinput = "$cmd:$tail";
1640:
1641: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
1642: chomp($what);
1.178.2.8! foxr 1643: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1644: &GDBM_READER());
! 1645: if ($hashref) {
! 1646: my @queries=split(/\&/,$what);
! 1647: my $qresult='';
1.178.2.4 albertel 1648: for (my $i=0;$i<=$#queries;$i++) {
1.178.2.8! foxr 1649: $qresult.="$hashref->{$queries[$i]}&";
1.178.2.4 albertel 1650: }
1.178.2.8! foxr 1651: if (untie(%$hashref)) {
1.178.2.4 albertel 1652: $qresult=~s/\&$//;
1653: if ($cipher) {
1654: my $cmdlength=length($qresult);
1655: $qresult.=" ";
1656: my $encqresult='';
1657: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1658: $encqresult.= unpack("H16", $cipher->encrypt(substr($qresult,
1659: $encidx,
1660: 8)));
1661: }
1662: Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
1663: } else {
1664: Failure( $client, "error:no_key\n", $userinput);
1665: }
1666: } else {
1667: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1668: "while attempting eget\n", $userinput);
1669: }
1670: } else {
1671: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1672: "while attempting eget\n", $userinput);
1673: }
1674:
1675: return 1;
1.178.2.1 foxr 1676: }
1677: RegisterHandler("eget", \&GetProfileEncrypted, 0, 1, 0);
1678:
1679: #
1680: # Deletes a key in a user profile database.
1681: #
1682: # Parameters:
1683: # $cmd - Command keyword (del).
1684: # $tail - Command tail. IN this case a colon
1685: # separated list containing:
1686: # The domain and user that identifies uniquely
1687: # the identity of the user.
1688: # The profile namespace (name of the profile
1689: # database file).
1690: # & separated list of keywords to delete.
1691: # $client - File open on client socket.
1692: # Returns:
1693: # 1 - Continue processing
1694: # 0 - Exit server.
1695: #
1696: #
1.178.2.6 foxr 1697:
1698: sub DeleteProfileEntry {
1.178.2.4 albertel 1699: my $cmd = shift;
1700: my $tail = shift;
1701: my $client = shift;
1702: my $userinput = "cmd:$tail";
1703:
1704: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1705: chomp($what);
1.178.2.8! foxr 1706: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1707: &GDBM_WRCREAT(),
! 1708: "D",$what);
! 1709: if ($hashref) {
! 1710: my @keys=split(/\&/,$what);
1.178.2.4 albertel 1711: foreach my $key (@keys) {
1.178.2.8! foxr 1712: delete($hashref->{$key});
1.178.2.4 albertel 1713: }
1.178.2.8! foxr 1714: if (untie(%$hashref)) {
1.178.2.4 albertel 1715: Reply($client, "ok\n", $userinput);
1716: } else {
1717: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1718: "while attempting del\n", $userinput);
1719: }
1720: } else {
1721: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1722: "while attempting del\n", $userinput);
1723: }
1724: return 1;
1.178.2.1 foxr 1725: }
1726: RegisterHandler("del", \&DeleteProfileEntry, 0, 1, 0);
1727: #
1728: # List the set of keys that are defined in a profile database file.
1729: # A successful reply from this will contain an & separated list of
1730: # the keys.
1731: # Parameters:
1732: # $cmd - Command request (keys).
1733: # $tail - Remainder of the request, a colon separated
1734: # list containing domain/user that identifies the
1735: # user being queried, and the database namespace
1736: # (database filename essentially).
1737: # $client - File open on the client.
1738: # Returns:
1739: # 1 - Continue processing.
1740: # 0 - Exit the server.
1741: #
1742: sub GetProfileKeys {
1.178.2.4 albertel 1743: my $cmd = shift;
1744: my $tail = shift;
1745: my $client = shift;
1746: my $userinput = "$cmd:$tail";
1747:
1748: my ($udom,$uname,$namespace)=split(/:/,$tail);
1749: my $qresult='';
1.178.2.8! foxr 1750: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1751: &GDBM_READER());
! 1752: if ($hashref) {
! 1753: foreach my $key (keys %$hashref) {
1.178.2.4 albertel 1754: $qresult.="$key&";
1755: }
1.178.2.8! foxr 1756: if (untie(%$hashref)) {
1.178.2.4 albertel 1757: $qresult=~s/\&$//;
1758: Reply($client, "$qresult\n", $userinput);
1759: } else {
1760: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1761: "while attempting keys\n", $userinput);
1762: }
1763: } else {
1764: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1765: "while attempting keys\n", $userinput);
1766: }
1.178.2.1 foxr 1767:
1.178.2.4 albertel 1768: return 1;
1.178.2.1 foxr 1769: }
1770: RegisterHandler("keys", \&GetProfileKeys, 0, 1, 0);
1771: #
1772: # Dump the contents of a user profile database.
1773: # Note that this constitutes a very large covert channel too since
1774: # the dump will return sensitive information that is not encrypted.
1775: # The naive security assumption is that the session negotiation ensures
1776: # our client is trusted and I don't believe that's assured at present.
1777: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
1778: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
1779: #
1780: # Parameters:
1781: # $cmd - The command request keyword (currentdump).
1782: # $tail - Remainder of the request, consisting of a colon
1783: # separated list that has the domain/username and
1784: # the namespace to dump (database file).
1785: # $client - file open on the remote client.
1786: # Returns:
1787: # 1 - Continue processing.
1788: # 0 - Exit the server.
1789: #
1790: sub DumpProfileDatabase {
1.178.2.4 albertel 1791: my $cmd = shift;
1792: my $tail = shift;
1793: my $client = shift;
1794: my $userinput = "$cmd:$tail";
1795:
1796: my ($udom,$uname,$namespace) = split(/:/,$tail);
1.178.2.8! foxr 1797: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1798: &GDBM_READER());
! 1799: if ($hashref) {
1.178.2.4 albertel 1800: # Structure of %data:
1801: # $data{$symb}->{$parameter}=$value;
1802: # $data{$symb}->{'v.'.$parameter}=$version;
1803: # since $parameter will be unescaped, we do not
1.178.2.8! foxr 1804: # have to worry about silly parameter names...
! 1805:
! 1806: my $qresult='';
1.178.2.4 albertel 1807: my %data = (); # A hash of anonymous hashes..
1.178.2.8! foxr 1808: while (my ($key,$value) = each(%$hashref)) {
1.178.2.4 albertel 1809: my ($v,$symb,$param) = split(/:/,$key);
1810: next if ($v eq 'version' || $symb eq 'keys');
1811: next if (exists($data{$symb}) &&
1812: exists($data{$symb}->{$param}) &&
1813: $data{$symb}->{'v.'.$param} > $v);
1814: $data{$symb}->{$param}=$value;
1815: $data{$symb}->{'v.'.$param}=$v;
1816: }
1.178.2.8! foxr 1817: if (untie(%$hashref)) {
1.178.2.4 albertel 1818: while (my ($symb,$param_hash) = each(%data)) {
1819: while(my ($param,$value) = each (%$param_hash)){
1820: next if ($param =~ /^v\./); # Ignore versions...
1821: #
1822: # Just dump the symb=value pairs separated by &
1823: #
1824: $qresult.=$symb.':'.$param.'='.$value.'&';
1825: }
1826: }
1827: chop($qresult);
1828: Reply($client , "$qresult\n", $userinput);
1829: } else {
1830: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1831: "while attempting currentdump\n", $userinput);
1832: }
1833: } else {
1834: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1835: "while attempting currentdump\n", $userinput);
1836: }
1.178.2.1 foxr 1837:
1.178.2.4 albertel 1838: return 1;
1.178.2.1 foxr 1839: }
1840: RegisterHandler("currentdump", \&DumpProfileDatabase, 0, 1, 0);
1841: #
1842: # Dump a profile database with an optional regular expression
1843: # to match against the keys. In this dump, no effort is made
1844: # to separate symb from version information. Presumably the
1845: # databases that are dumped by this command are of a different
1846: # structure. Need to look at this and improve the documentation of
1847: # both this and the currentdump handler.
1848: # Parameters:
1849: # $cmd - The command keyword.
1850: # $tail - All of the characters after the $cmd:
1851: # These are expected to be a colon
1852: # separated list containing:
1853: # domain/user - identifying the user.
1854: # namespace - identifying the database.
1855: # regexp - optional regular expression
1856: # that is matched against
1857: # database keywords to do
1858: # selective dumps.
1859: # $client - Channel open on the client.
1860: # Returns:
1861: # 1 - Continue processing.
1862: # Side effects:
1863: # response is written to $client.
1864: #
1865: sub DumpWithRegexp {
1.178.2.4 albertel 1866: my $cmd = shift;
1867: my $tail = shift;
1868: my $client = shift;
1869:
1870: my $userinput = "$cmd:$tail";
1871:
1872: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
1873: if (defined($regexp)) {
1874: $regexp=&unescape($regexp);
1875: } else {
1876: $regexp='.';
1877: }
1.178.2.8! foxr 1878: my $hashref =TieResourceHash($udom, $uname, $namespace,
! 1879: &GDBM_READER());
! 1880: if ($hashref) {
! 1881: my $qresult='';
! 1882: while (my ($key,$value) = each(%$hashref)) {
1.178.2.4 albertel 1883: if ($regexp eq '.') {
1884: $qresult.=$key.'='.$value.'&';
1885: } else {
1886: my $unescapeKey = &unescape($key);
1887: if (eval('$unescapeKey=~/$regexp/')) {
1888: $qresult.="$key=$value&";
1889: }
1890: }
1891: }
1.178.2.8! foxr 1892: if (untie(%$hashref)) {
1.178.2.4 albertel 1893: chop($qresult);
1894: Reply($client, "$qresult\n", $userinput);
1895: } else {
1896: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1897: "while attempting dump\n", $userinput);
1898: }
1899: } else {
1900: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1901: "while attempting dump\n", $userinput);
1902: }
1.178.2.1 foxr 1903:
1904: return 1;
1905: }
1906: RegisterHandler("dump", \&DumpWithRegexp, 0, 1, 0);
1907:
1908: # Store an aitem in any database but the roles database.
1909: #
1910: # Parameters:
1911: # $cmd - Request command keyword.
1912: # $tail - Tail of the request. This is a colon
1913: # separated list containing:
1914: # domain/user - User and authentication domain.
1915: # namespace - Name of the database being modified
1916: # rid - Resource keyword to modify.
1917: # what - new value associated with rid.
1918: #
1919: # $client - Socket open on the client.
1920: #
1921: #
1922: # Returns:
1923: # 1 (keep on processing).
1924: # Side-Effects:
1925: # Writes to the client
1926: sub StoreHandler {
1.178.2.4 albertel 1927: my $cmd = shift;
1928: my $tail = shift;
1929: my $client = shift;
1.178.2.1 foxr 1930:
1.178.2.4 albertel 1931: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 1932:
1.178.2.4 albertel 1933: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
1934: if ($namespace ne 'roles') {
1.178.2.8! foxr 1935:
1.178.2.4 albertel 1936: chomp($what);
1937: my @pairs=split(/\&/,$what);
1.178.2.8! foxr 1938: my $hashref = TieResourceHash($udom, $uname, $namespace,
! 1939: &GDBM_WRCREAT(), "P",
! 1940: "$rid:$what");
! 1941: if ($hashref) {
! 1942: my $now = time;
! 1943: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
1.178.2.4 albertel 1944: my $key;
1.178.2.8! foxr 1945: $hashref->{"version:$rid"}++;
! 1946: my $version=$hashref->{"version:$rid"};
1.178.2.4 albertel 1947: my $allkeys='';
1948: foreach my $pair (@pairs) {
1949: my ($key,$value)=split(/=/,$pair);
1950: $allkeys.=$key.':';
1.178.2.8! foxr 1951: $hashref->{"$version:$rid:$key"}=$value;
1.178.2.4 albertel 1952: }
1.178.2.8! foxr 1953: $hashref->{"$version:$rid:timestamp"}=$now;
1.178.2.4 albertel 1954: $allkeys.='timestamp';
1.178.2.8! foxr 1955: $hashref->{"$version:keys:$rid"}=$allkeys;
! 1956: if (untie($hashref)) {
1.178.2.4 albertel 1957: Reply($client, "ok\n", $userinput);
1958: } else {
1959: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1960: "while attempting store\n", $userinput);
1961: }
1962: } else {
1963: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1964: "while attempting store\n", $userinput);
1965: }
1966: } else {
1967: Failure($client, "refused\n", $userinput);
1.178.2.1 foxr 1968: }
1969:
1.178.2.4 albertel 1970: return 1;
1.178.2.1 foxr 1971: }
1972: RegisterHandler("store", \&StoreHandler, 0, 1, 0);
1973: #
1974: # Restore a prior version of a resource.
1975: #
1976: # Parameters:
1977: # $cmd - Command keyword.
1978: # $tail - Remainder of the request which consists of:
1979: # domain/user - User and auth. domain.
1980: # namespace - name of resource database.
1981: # rid - Resource id.
1982: # $client - socket open on the client.
1983: #
1984: # Returns:
1985: # 1 indicating the caller should not yet exit.
1986: # Side-effects:
1987: # Writes a reply to the client.
1988: #
1989: sub RestoreHandler {
1.178.2.4 albertel 1990: my $cmd = shift;
1991: my $tail = shift;
1992: my $client = shift;
1993:
1994: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
1995:
1996: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
1997: $namespace=~s/\//\_/g;
1998: $namespace=~s/\W//g;
1999: chomp($rid);
2000: my $proname=propath($udom,$uname);
2001: my $qresult='';
2002: my %hash;
2003: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2004: &GDBM_READER(),0640)) {
2005: my $version=$hash{"version:$rid"};
2006: $qresult.="version=$version&";
2007: my $scope;
2008: for ($scope=1;$scope<=$version;$scope++) {
2009: my $vkeys=$hash{"$scope:keys:$rid"};
2010: my @keys=split(/:/,$vkeys);
2011: my $key;
2012: $qresult.="$scope:keys=$vkeys&";
2013: foreach $key (@keys) {
2014: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2015: }
2016: }
2017: if (untie(%hash)) {
2018: $qresult=~s/\&$//;
2019: Reply( $client, "$qresult\n", $userinput);
2020: } else {
2021: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2022: "while attempting restore\n", $userinput);
2023: }
2024: } else {
2025: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2026: "while attempting restore\n", $userinput);
2027: }
1.178.2.1 foxr 2028:
1.178.2.4 albertel 2029: return 1;
1.178.2.1 foxr 2030:
2031:
2032: }
1.178.2.6 foxr 2033: RegisterHandler("restore", \&RestoreHandler, 0,1,0);
1.178.2.1 foxr 2034:
2035: #
2036: # Add a chat message to to a discussion board.
2037: #
2038: # Parameters:
2039: # $cmd - Request keyword.
2040: # $tail - Tail of the command. A colon separated list
2041: # containing:
2042: # cdom - Domain on which the chat board lives
2043: # cnum - Identifier of the discussion group.
2044: # post - Body of the posting.
2045: # $client - Socket open on the client.
2046: # Returns:
2047: # 1 - Indicating caller should keep on processing.
2048: #
2049: # Side-effects:
2050: # writes a reply to the client.
2051: #
2052: #
2053: sub SendChatHandler {
1.178.2.4 albertel 2054: my $cmd = shift;
2055: my $tail = shift;
2056: my $client = shift;
2057:
2058: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 2059:
1.178.2.4 albertel 2060: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2061: &chatadd($cdom,$cnum,$newpost);
2062: Reply($client, "ok\n", $userinput);
1.178.2.1 foxr 2063:
1.178.2.4 albertel 2064: return 1;
1.178.2.1 foxr 2065: }
2066: RegisterHandler("chatsend", \&SendChatHandler, 0, 1, 0);
2067: #
2068: # Retrieve the set of chat messagss from a discussion board.
2069: #
2070: # Parameters:
2071: # $cmd - Command keyword that initiated the request.
2072: # $tail - Remainder of the request after the command
2073: # keyword. In this case a colon separated list of
2074: # chat domain - Which discussion board.
2075: # chat id - Discussion thread(?)
2076: # domain/user - Authentication domain and username
2077: # of the requesting person.
2078: # $client - Socket open on the client program.
2079: # Returns:
2080: # 1 - continue processing
2081: # Side effects:
2082: # Response is written to the client.
2083: #
2084: sub RetrieveChatHandler {
1.178.2.4 albertel 2085: my $cmd = shift;
2086: my $tail = shift;
2087: my $client = shift;
2088:
2089: my $userinput = "$cmd:$tail";
2090:
2091: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
2092: my $reply='';
2093: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2094: $reply.=&escape($_).':';
2095: }
2096: $reply=~s/\:$//;
2097: Reply($client, $reply."\n", $userinput);
1.178.2.1 foxr 2098:
2099:
1.178.2.4 albertel 2100: return 1;
1.178.2.1 foxr 2101: }
2102: RegisterHandler("chatretr", \&RetrieveChatHandler, 0, 1, 0);
2103: #
2104: # Initiate a query of an sql database. SQL query repsonses get put in
2105: # a file for later retrieval. This prevents sql query results from
2106: # bottlenecking the system. Note that with loncnew, perhaps this is
2107: # less of an issue since multiple outstanding requests can be concurrently
2108: # serviced.
2109: #
2110: # Parameters:
2111: # $cmd - COmmand keyword that initiated the request.
2112: # $tail - Remainder of the command after the keyword.
2113: # For this function, this consists of a query and
2114: # 3 arguments that are self-documentingly labelled
2115: # in the original arg1, arg2, arg3.
2116: # $client - Socket open on the client.
2117: # Return:
2118: # 1 - Indicating processing should continue.
2119: # Side-effects:
2120: # a reply is written to $client.
2121: #
2122: sub SendQueryHandler {
1.178.2.4 albertel 2123: my $cmd = shift;
2124: my $tail = shift;
2125: my $client = shift;
2126:
2127: my $userinput = "$cmd:$tail";
2128:
2129: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
2130: $query=~s/\n*$//g;
2131: Reply($client, "". sqlreply("$clientname\&$query".
2132: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
2133: $userinput);
2134:
2135: return 1;
1.178.2.1 foxr 2136: }
2137: RegisterHandler("querysend", \&SendQueryHandler, 0, 1, 0);
2138:
2139: #
2140: # Add a reply to an sql query. SQL queries are done asyncrhonously.
2141: # The query is submitted via a "querysend" transaction.
2142: # There it is passed on to the lonsql daemon, queued and issued to
2143: # mysql.
2144: # This transaction is invoked when the sql transaction is complete
2145: # it stores the query results in flie and indicates query completion.
2146: # presumably local software then fetches this response... I'm guessing
2147: # the sequence is: lonc does a querysend, we ask lonsql to do it.
2148: # lonsql on completion of the query interacts with the lond of our
2149: # client to do a query reply storing two files:
2150: # - id - The results of the query.
2151: # - id.end - Indicating the transaction completed.
2152: # NOTE: id is a unique id assigned to the query and querysend time.
2153: # Parameters:
2154: # $cmd - Command keyword that initiated this request.
2155: # $tail - Remainder of the tail. In this case that's a colon
2156: # separated list containing the query Id and the
2157: # results of the query.
2158: # $client - Socket open on the client.
2159: # Return:
2160: # 1 - Indicating that we should continue processing.
2161: # Side effects:
2162: # ok written to the client.
2163: #
2164: sub ReplyQueryHandler {
1.178.2.4 albertel 2165: my $cmd = shift;
2166: my $tail = shift;
2167: my $client = shift;
2168:
2169: my $userinput = "$cmd:$tail";
2170:
2171: my ($cmd,$id,$reply)=split(/:/,$userinput);
2172: my $store;
2173: my $execdir=$perlvar{'lonDaemons'};
2174: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2175: $reply=~s/\&/\n/g;
2176: print $store $reply;
2177: close $store;
2178: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2179: print $store2 "done\n";
2180: close $store2;
2181: Reply($client, "ok\n", $userinput);
2182: } else {
2183: Failure($client, "error: ".($!+0)
2184: ." IO::File->new Failed ".
2185: "while attempting queryreply\n", $userinput);
2186: }
1.178.2.1 foxr 2187:
2188:
1.178.2.4 albertel 2189: return 1;
1.178.2.1 foxr 2190: }
2191: RegisterHandler("queryreply", \&ReplyQueryHandler, 0, 1, 0);
2192: #
2193: # Process the courseidput query. Not quite sure what this means
2194: # at the system level sense. It appears a gdbm file in the
2195: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
2196: # a set of entries made in that database.
2197: #
2198: # Parameters:
2199: # $cmd - The command keyword that initiated this request.
2200: # $tail - Tail of the command. In this case consists of a colon
2201: # separated list contaning the domain to apply this to and
2202: # an ampersand separated list of keyword=value pairs.
2203: # $client - Socket open on the client.
2204: # Returns:
2205: # 1 - indicating that processing should continue
2206: #
2207: # Side effects:
2208: # reply is written to the client.
2209: #
2210: sub PutCourseIdHandler {
1.178.2.4 albertel 2211: my $cmd = shift;
2212: my $tail = shift;
2213: my $client = shift;
1.178.2.1 foxr 2214:
1.178.2.4 albertel 2215: my $userinput = "$cmd:$tail";
2216:
2217: my ($udom,$what)=split(/:/,$tail);
2218: chomp($what);
2219: $udom=~s/\W//g;
2220: my $proname=
2221: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2222: my $now=time;
2223: my @pairs=split(/\&/,$what);
2224: my %hash;
2225: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2226: foreach my $pair (@pairs) {
2227: my ($key,$value)=split(/=/,$pair);
2228: $hash{$key}=$value.':'.$now;
2229: }
2230: if (untie(%hash)) {
2231: Reply($client, "ok\n", $userinput);
2232: } else {
2233: Failure( $client, "error: ".($!+0)
2234: ." untie(GDBM) Failed ".
2235: "while attempting courseidput\n", $userinput);
2236: }
2237: } else {
2238: Failure( $client, "error: ".($!+0)
2239: ." tie(GDBM) Failed ".
2240: "while attempting courseidput\n", $userinput);
2241: }
2242:
2243: return 1;
1.178.2.1 foxr 2244: }
2245: RegisterHandler("courseidput", \&PutCourseIdHandler, 0, 1, 0);
2246:
2247: # Retrieves the value of a course id resource keyword pattern
2248: # defined since a starting date. Both the starting date and the
2249: # keyword pattern are optional. If the starting date is not supplied it
2250: # is treated as the beginning of time. If the pattern is not found,
2251: # it is treatred as "." matching everything.
2252: #
2253: # Parameters:
2254: # $cmd - Command keyword that resulted in us being dispatched.
2255: # $tail - The remainder of the command that, in this case, consists
2256: # of a colon separated list of:
2257: # domain - The domain in which the course database is
2258: # defined.
2259: # since - Optional parameter describing the minimum
2260: # time of definition(?) of the resources that
2261: # will match the dump.
2262: # description - regular expression that is used to filter
2263: # the dump. Only keywords matching this regexp
2264: # will be used.
2265: # $client - The socket open on the client.
2266: # Returns:
2267: # 1 - Continue processing.
2268: # Side Effects:
2269: # a reply is written to $client.
2270: sub DumpCourseIdHandler {
1.178.2.4 albertel 2271: my $cmd = shift;
2272: my $tail = shift;
2273: my $client = shift;
2274:
2275: my $userinput = "$cmd:$tail";
2276:
2277: my ($udom,$since,$description) =split(/:/,$tail);
2278: if (defined($description)) {
2279: $description=&unescape($description);
2280: } else {
2281: $description='.';
2282: }
2283: unless (defined($since)) { $since=0; }
2284: my $qresult='';
2285: my $proname = "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2286: my %hash;
2287: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2288: while (my ($key,$value) = each(%hash)) {
2289: my ($descr,$lasttime)=split(/\:/,$value);
2290: if ($lasttime<$since) {
2291: next;
2292: }
2293: if ($description eq '.') {
2294: $qresult.=$key.'='.$descr.'&';
2295: } else {
2296: my $unescapeVal = &unescape($descr);
2297: if (eval('$unescapeVal=~/$description/i')) {
2298: $qresult.="$key=$descr&";
2299: }
2300: }
2301: }
2302: if (untie(%hash)) {
2303: chop($qresult);
2304: Reply($client, "$qresult\n", $userinput);
2305: } else {
2306: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2307: "while attempting courseiddump\n", $userinput);
2308: }
2309: } else {
2310: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2311: "while attempting courseiddump\n", $userinput);
2312: }
1.178.2.1 foxr 2313:
2314:
1.178.2.4 albertel 2315: return 1;
1.178.2.1 foxr 2316: }
2317: RegisterHandler("courseiddump", \&DumpCourseIdHandler, 0, 1, 0);
2318: #
2319: # Puts an id to a domains id database.
2320: #
2321: # Parameters:
2322: # $cmd - The command that triggered us.
2323: # $tail - Remainder of the request other than the command. This is a
2324: # colon separated list containing:
2325: # $domain - The domain for which we are writing the id.
2326: # $pairs - The id info to write... this is and & separated list
2327: # of keyword=value.
2328: # $client - Socket open on the client.
2329: # Returns:
2330: # 1 - Continue processing.
2331: # Side effects:
2332: # reply is written to $client.
2333: #
2334: sub PutIdHandler {
1.178.2.4 albertel 2335: my $cmd = shift;
2336: my $tail = shift;
2337: my $client = shift;
2338:
2339: my $userinput = "$cmd:$tail";
2340:
2341: my ($udom,$what)=split(/:/,$tail);
2342: chomp($what);
2343: $udom=~s/\W//g;
2344: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2345: my $now=time;
2346: {
2347: my $hfh;
2348: if ($hfh=IO::File->new(">>$proname.hist")) {
2349: print $hfh "P:$now:$what\n";
2350: }
2351: }
2352: my @pairs=split(/\&/,$what);
2353: my %hash;
2354: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2355: foreach my $pair (@pairs) {
2356: my ($key,$value)=split(/=/,$pair);
2357: $hash{$key}=$value;
2358: }
2359: if (untie(%hash)) {
2360: Reply($client, "ok\n", $userinput);
2361: } else {
2362: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2363: "while attempting idput\n", $userinput);
2364: }
2365: } else {
2366: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2367: "while attempting idput\n", $userinput);
1.178.2.1 foxr 2368: }
2369:
1.178.2.4 albertel 2370: return 1;
1.178.2.1 foxr 2371: }
2372:
2373: RegisterHandler("idput", \&PutIdHandler, 0, 1, 0);
2374: #
2375: # Retrieves a set of id values from the id database.
2376: # Returns an & separated list of results, one for each requested id to the
2377: # client.
2378: #
2379: # Parameters:
2380: # $cmd - Command keyword that caused us to be dispatched.
2381: # $tail - Tail of the command. Consists of a colon separated:
2382: # domain - the domain whose id table we dump
2383: # ids Consists of an & separated list of
2384: # id keywords whose values will be fetched.
2385: # nonexisting keywords will have an empty value.
2386: # $client - Socket open on the client.
2387: #
2388: # Returns:
2389: # 1 - indicating processing should continue.
2390: # Side effects:
2391: # An & separated list of results is written to $client.
2392: #
2393: sub GetIdHandler {
1.178.2.4 albertel 2394: my $cmd = shift;
2395: my $tail = shift;
2396: my $client = shift;
2397:
2398: my $userinput = "$client:$tail";
2399:
2400: my ($udom,$what)=split(/:/,$tail);
2401: chomp($what);
2402: $udom=~s/\W//g;
2403: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2404: my @queries=split(/\&/,$what);
2405: my $qresult='';
2406: my %hash;
2407: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2408: for (my $i=0;$i<=$#queries;$i++) {
2409: $qresult.="$hash{$queries[$i]}&";
2410: }
2411: if (untie(%hash)) {
2412: $qresult=~s/\&$//;
2413: Reply($client, "$qresult\n", $userinput);
2414: } else {
2415: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2416: "while attempting idget\n",$userinput);
2417: }
2418: } else {
2419: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2420: "while attempting idget\n",$userinput);
2421: }
1.178.2.1 foxr 2422:
1.178.2.4 albertel 2423: return 1;
1.178.2.1 foxr 2424: }
1.178.2.3 foxr 2425:
1.178.2.1 foxr 2426: RegisterHandler("idget", \&GetIdHandler, 0, 1, 0);
1.178.2.3 foxr 2427: #
2428: # Process the tmpput command I'm not sure what this does.. Seems to
2429: # create a file in the lonDaemons/tmp directory of the form $id.tmp
2430: # where Id is the client's ip concatenated with a sequence number.
2431: # The file will contain some value that is passed in. Is this e.g.
2432: # a login token?
2433: #
2434: # Parameters:
2435: # $cmd - The command that got us dispatched.
2436: # $tail - The remainder of the request following $cmd:
2437: # In this case this will be the contents of the file.
2438: # $client - Socket connected to the client.
2439: # Returns:
2440: # 1 indicating processing can continue.
2441: # Side effects:
2442: # A file is created in the local filesystem.
2443: # A reply is sent to the client.
2444: sub TmpPutHandler {
1.178.2.4 albertel 2445: my $cmd = shift;
2446: my $what = shift;
2447: my $client = shift;
2448:
2449: my $userinput = "$cmd:$what"; # Reconstruct for logging.
2450:
2451:
2452: my $store;
2453: $tmpsnum++;
2454: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2455: $id=~s/\W/\_/g;
2456: $what=~s/\n//g;
2457: my $execdir=$perlvar{'lonDaemons'};
2458: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2459: print $store $what;
2460: close $store;
2461: Reply($client, "$id\n", $userinput);
2462: } else {
2463: Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
2464: "while attempting tmpput\n", $userinput);
2465: }
2466: return 1;
1.178.2.3 foxr 2467:
2468: }
2469: RegisterHandler("tmpput", \&TmpPutHandler, 0, 1, 0);
2470:
2471: # Processes the tmpget command. This command returns the contents
2472: # of a temporary resource file(?) created via tmpput.
2473: #
2474: # Paramters:
2475: # $cmd - Command that got us dispatched.
2476: # $id - Tail of the command, contain the id of the resource
2477: # we want to fetch.
2478: # $client - socket open on the client.
2479: # Return:
2480: # 1 - Inidcating processing can continue.
2481: # Side effects:
2482: # A reply is sent to the client.
2483:
2484: #
2485: sub TmpGetHandler {
1.178.2.4 albertel 2486: my $cmd = shift;
2487: my $id = shift;
2488: my $client = shift;
2489: my $userinput = "$cmd:$id";
2490:
2491: chomp($id);
2492: $id=~s/\W/\_/g;
2493: my $store;
2494: my $execdir=$perlvar{'lonDaemons'};
2495: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2496: my $reply=<$store>;
2497: Reply( $client, "$reply\n", $userinput);
2498: close $store;
2499: } else {
2500: Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
2501: "while attempting tmpget\n", $userinput);
2502: }
1.178.2.3 foxr 2503:
1.178.2.4 albertel 2504: return 1;
1.178.2.3 foxr 2505: }
2506: RegisterHandler("tmpget", \&TmpGetHandler, 0, 1, 0);
2507: #
2508: # Process the tmpdel command. This command deletes a temp resource
2509: # created by the tmpput command.
2510: #
2511: # Parameters:
2512: # $cmd - Command that got us here.
2513: # $id - Id of the temporary resource created.
2514: # $client - socket open on the client process.
2515: #
2516: # Returns:
2517: # 1 - Indicating processing should continue.
2518: # Side Effects:
2519: # A file is deleted
2520: # A reply is sent to the client.
2521: sub TmpDelHandler {
1.178.2.4 albertel 2522: my $cmd = shift;
2523: my $id = shift;
2524: my $client = shift;
2525:
2526: my $userinput= "$cmd:$id";
1.178.2.3 foxr 2527:
1.178.2.4 albertel 2528: chomp($id);
2529: $id=~s/\W/\_/g;
2530: my $execdir=$perlvar{'lonDaemons'};
2531: if (unlink("$execdir/tmp/$id.tmp")) {
2532: Reply($client, "ok\n", $userinput);
2533: } else {
2534: Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
2535: "while attempting tmpdel\n", $userinput);
2536: }
2537:
2538: return 1;
1.178.2.3 foxr 2539:
2540: }
2541: RegisterHandler("tmpdel", \&TmpDelHandler, 0, 1, 0);
2542: #
2543: # ls - list the contents of a directory. For each file in the
2544: # selected directory the filename followed by the full output of
2545: # the stat function is returned. The returned info for each
2546: # file are separated by ':'. The stat fields are separated by &'s.
2547: # Parameters:
2548: # $cmd - The command that dispatched us (ls).
2549: # $ulsdir - The directory path to list... I'm not sure what this
2550: # is relative as things like ls:. return e.g.
2551: # no_such_dir.
2552: # $client - Socket open on the client.
2553: # Returns:
2554: # 1 - indicating that the daemon should not disconnect.
2555: # Side Effects:
2556: # The reply is written to $client.
2557: #
2558: sub LsHandler {
1.178.2.4 albertel 2559: my $cmd = shift;
2560: my $ulsdir = shift;
2561: my $client = shift;
1.178.2.3 foxr 2562:
1.178.2.4 albertel 2563: my $userinput = "$cmd:$ulsdir";
1.178.2.3 foxr 2564:
1.178.2.4 albertel 2565: my $ulsout='';
2566: my $ulsfn;
2567: if (-e $ulsdir) {
2568: if(-d $ulsdir) {
2569: if (opendir(LSDIR,$ulsdir)) {
2570: while ($ulsfn=readdir(LSDIR)) {
2571: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2572: $ulsout.=$ulsfn.'&'.
2573: join('&',@ulsstats).':';
2574: }
2575: closedir(LSDIR);
2576: }
2577: } else {
2578: my @ulsstats=stat($ulsdir);
2579: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2580: }
2581: } else {
2582: $ulsout='no_such_dir';
2583: }
2584: if ($ulsout eq '') { $ulsout='empty'; }
2585: Reply($client, "$ulsout\n", $userinput);
2586:
2587:
2588: return 1;
1.178.2.3 foxr 2589: }
2590: RegisterHandler("ls", \&LsHandler, 0, 1, 0);
2591:
2592:
2593: #
2594: # Processes the setannounce command. This command
2595: # creates a file named announce.txt in the top directory of
2596: # the documentn root and sets its contents. The announce.txt file is
2597: # printed in its entirety at the LonCAPA login page. Note:
2598: # once the announcement.txt fileis created it cannot be deleted.
2599: # However, setting the contents of the file to empty removes the
2600: # announcement from the login page of loncapa so who cares.
2601: #
2602: # Parameters:
2603: # $cmd - The command that got us dispatched.
2604: # $announcement - The text of the announcement.
2605: # $client - Socket open on the client process.
2606: # Retunrns:
2607: # 1 - Indicating request processing should continue
2608: # Side Effects:
2609: # The file {DocRoot}/announcement.txt is created.
2610: # A reply is sent to $client.
2611: #
2612: sub SetAnnounceHandler {
1.178.2.4 albertel 2613: my $cmd = shift;
2614: my $announcement = shift;
2615: my $client = shift;
1.178.2.3 foxr 2616:
1.178.2.4 albertel 2617: my $userinput = "$cmd:$announcement";
1.178.2.3 foxr 2618:
1.178.2.4 albertel 2619: chomp($announcement);
2620: $announcement=&unescape($announcement);
2621: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2622: '/announcement.txt')) {
2623: print $store $announcement;
2624: close $store;
2625: Reply($client, "ok\n", $userinput);
2626: } else {
2627: Failure($client, "error: ".($!+0)."\n", $userinput);
2628: }
1.178.2.3 foxr 2629:
1.178.2.4 albertel 2630: return 1;
1.178.2.3 foxr 2631: }
2632: RegisterHandler("setannounce", \&SetAnnounceHandler, 0, 1, 0);
2633:
2634: #
2635: # Return the version of the daemon. This can be used to determine
2636: # the compatibility of cross version installations or, alternatively to
2637: # simply know who's out of date and who isn't. Note that the version
2638: # is returned concatenated with the tail.
2639: # Parameters:
2640: # $cmd - the request that dispatched to us.
2641: # $tail - Tail of the request (client's version?).
2642: # $client - Socket open on the client.
2643: #Returns:
2644: # 1 - continue processing requests.
2645: # Side Effects:
2646: # Replies with version to $client.
2647: sub GetVersionHandler {
1.178.2.4 albertel 2648: my $client = shift;
2649: my $tail = shift;
2650: my $client = shift;
2651: my $userinput = $client;
2652:
2653: Reply($client, &version($userinput)."\n", $userinput);
1.178.2.3 foxr 2654:
2655:
1.178.2.4 albertel 2656: return 1;
1.178.2.3 foxr 2657: }
2658: RegisterHandler("version", \&GetVersionHandler, 0, 1, 0);
2659:
2660: # Set the current host and domain. This is used to support
2661: # multihomed systems. Each IP of the system, or even separate daemons
2662: # on the same IP can be treated as handling a separate lonCAPA virtual
2663: # machine. This command selects the virtual lonCAPA. The client always
2664: # knows the right one since it is lonc and it is selecting the domain/system
2665: # from the hosts.tab file.
2666: # Parameters:
2667: # $cmd - Command that dispatched us.
2668: # $tail - Tail of the command (domain/host requested).
2669: # $socket - Socket open on the client.
2670: #
2671: # Returns:
2672: # 1 - Indicates the program should continue to process requests.
2673: # Side-effects:
2674: # The default domain/system context is modified for this daemon.
2675: # a reply is sent to the client.
2676: #
2677: sub SelectHostHandler {
1.178.2.4 albertel 2678: my $cmd = shift;
2679: my $tail = shift;
2680: my $socket = shift;
1.178.2.3 foxr 2681:
1.178.2.4 albertel 2682: my $userinput ="$cmd:$tail";
1.178.2.3 foxr 2683:
1.178.2.4 albertel 2684: Reply($client, &sethost($userinput)."\n", $userinput);
1.178.2.3 foxr 2685:
2686:
1.178.2.4 albertel 2687: return 1;
1.178.2.3 foxr 2688: }
2689: RegisterHandler("sethost", \&SelectHostHandler, 0, 1, 0);
2690:
2691: # Process a request to exit:
2692: # - "bye" is sent to the client.
2693: # - The client socket is shutdown and closed.
2694: # - We indicate to the caller that we should exit.
2695: # Formal Parameters:
2696: # $cmd - The command that got us here.
2697: # $tail - Tail of the command (empty).
2698: # $client - Socket open on the tail.
2699: # Returns:
2700: # 0 - Indicating the program should exit!!
2701: #
2702: sub ExitHandler {
1.178.2.4 albertel 2703: my $cmd = shift;
2704: my $tail = shift;
2705: my $client = shift;
2706:
2707: my $userinput = "$cmd:$tail";
2708:
2709: &logthis("Client $clientip ($clientname) hanging up: $userinput");
2710: Reply($client, "bye\n", $userinput);
2711: $client->shutdown(2); # shutdown the socket forcibly.
2712: $client->close();
1.178.2.3 foxr 2713:
1.178.2.4 albertel 2714: return 0;
1.178.2.3 foxr 2715: }
2716: RegisterHandler("exit", \&ExitHandler, 0, 1,1);
2717: RegisterHandler("init", \&ExitHandler, 0, 1,1); # RE-init is like exit.
2718: RegisterHandler("quit", \&ExitHandler, 0, 1,1); # I like this too!
1.178.2.1 foxr 2719: #------------------------------------------------------------------------------------
2720: #
2721: # Process a Request. Takes a request from the client validates
2722: # it and performs the operation requested by it. Returns
2723: # a response to the client.
2724: #
2725: # Parameters:
2726: # request - A string containing the user's request.
2727: # Returns:
2728: # 0 - Requested to exit, caller should shut down.
2729: # 1 - Accept additional requests from the client.
2730: #
2731: sub ProcessRequest {
1.178.2.4 albertel 2732: my $Request = shift;
2733: my $KeepGoing = 1; # Assume we're not asked to stop.
1.178.2.1 foxr 2734:
1.178.2.4 albertel 2735: my $wasenc=0;
2736: my $userinput = $Request; # for compatibility with oldcode <yeach>
1.178.2.1 foxr 2737:
2738:
2739: # ------------------------------------------------------------ See if encrypted
2740:
1.178.2.4 albertel 2741: if($userinput =~ /^enc/) {
2742: $wasenc = 1;
2743: $userinput = Decipher($userinput);
2744: if(! $userinput) {
2745: Failure($client,"error:Encrypted data without negotiating key");
2746: return 0; # Break off with this imposter.
2747: }
2748: }
2749: # Split off the request keyword from the rest of the stuff.
1.178.2.1 foxr 2750:
1.178.2.4 albertel 2751: my ($command, $tail) = split(/:/, $userinput, 2);
1.178.2.2 foxr 2752:
1.178.2.4 albertel 2753: Debug("Command received: $command, encoded = $wasenc");
1.178.2.2 foxr 2754:
1.178.2.1 foxr 2755:
2756: # ------------------------------------------------------------- Normal commands
2757:
1.178.2.4 albertel 2758: #
2759: # If the command is in the hash, then execute it via the hash dispatch:
2760: #
2761: if(defined $Dispatcher{$command}) {
2762:
2763: my $DispatchInfo = $Dispatcher{$command};
2764: my $Handler = $$DispatchInfo[0];
2765: my $NeedEncode = $$DispatchInfo[1];
2766: my $ClientTypes = $$DispatchInfo[2];
2767: Debug("Matched dispatch hash: mustencode: $NeedEncode ClientType $ClientTypes");
1.178.2.1 foxr 2768:
1.178.2.4 albertel 2769: # Validate the request:
1.178.2.1 foxr 2770:
1.178.2.4 albertel 2771: my $ok = 1;
2772: my $requesterprivs = 0;
2773: if(isClient()) {
2774: $requesterprivs |= $CLIENT_OK;
2775: }
2776: if(isManager()) {
2777: $requesterprivs |= $MANAGER_OK;
2778: }
2779: if($NeedEncode && (!$wasenc)) {
2780: Debug("Must encode but wasn't: $NeedEncode $wasenc");
2781: $ok = 0;
2782: }
2783: if(($ClientTypes & $requesterprivs) == 0) {
2784: Debug("Client not privileged to do this operation");
2785: $ok = 0;
2786: }
2787:
2788: if($ok) {
2789: Debug("Dispatching to handler $command $tail");
2790: $KeepGoing = &$Handler($command, $tail, $client);
2791: } else {
2792: Debug("Refusing to dispatch because ok is false");
2793: Failure($client, "refused", $userinput);
2794: }
1.161 foxr 2795:
2796:
1.178.2.1 foxr 2797: # ------------------------------------------------------------- unknown command
1.97 foxr 2798:
1.178.2.4 albertel 2799: } else {
1.178.2.1 foxr 2800: # unknown command
1.178.2.4 albertel 2801: Failure($client, "unknown_cmd\n", $userinput);
2802: }
1.97 foxr 2803:
1.178.2.1 foxr 2804: return $KeepGoing;
2805: }
1.97 foxr 2806:
1.96 foxr 2807:
2808: #
1.140 foxr 2809: # GetCertificate: Given a transaction that requires a certificate,
2810: # this function will extract the certificate from the transaction
2811: # request. Note that at this point, the only concept of a certificate
2812: # is the hostname to which we are connected.
2813: #
2814: # Parameter:
2815: # request - The request sent by our client (this parameterization may
2816: # need to change when we really use a certificate granting
2817: # authority.
2818: #
2819: sub GetCertificate {
2820: my $request = shift;
2821:
2822: return $clientip;
2823: }
1.161 foxr 2824:
2825:
2826:
1.156 foxr 2827: #
2828: # ReadManagerTable: Reads in the current manager table. For now this is
2829: # done on each manager authentication because:
2830: # - These authentications are not frequent
2831: # - This allows dynamic changes to the manager table
2832: # without the need to signal to the lond.
2833: #
2834:
2835: sub ReadManagerTable {
2836:
2837: # Clean out the old table first..
2838:
1.178.2.4 albertel 2839: foreach my $key (keys %managers) {
2840: delete $managers{$key};
2841: }
2842:
2843: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
2844: if (!open (MANAGERS, $tablename)) {
2845: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
2846: return;
2847: }
2848: while(my $host = <MANAGERS>) {
2849: chomp($host);
2850: if ($host =~ "^#") { # Comment line.
2851: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
2852: next;
2853: }
2854: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 2855: # The entry is of the form:
2856: # cluname:hostname
2857: # cluname - A 'cluster hostname' is needed in order to negotiate
2858: # the host key.
2859: # hostname- The dns name of the host.
2860: #
1.178.2.4 albertel 2861: my($cluname, $dnsname) = split(/:/, $host);
2862:
2863: my $ip = gethostbyname($dnsname);
2864: if(defined($ip)) { # bad names don't deserve entry.
2865: my $hostip = inet_ntoa($ip);
2866: $managers{$hostip} = $cluname;
2867: logthis('<font color="green"> registering manager '.
2868: "$dnsname as $cluname with $hostip </font>\n");
2869: }
2870: } else {
2871: logthis('<font color="green"> existing host'." $host</font>\n");
2872: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
2873: }
2874: }
1.156 foxr 2875: }
1.140 foxr 2876:
2877: #
2878: # ValidManager: Determines if a given certificate represents a valid manager.
2879: # in this primitive implementation, the 'certificate' is
2880: # just the connecting loncapa client name. This is checked
2881: # against a valid client list in the configuration.
2882: #
2883: #
2884: sub ValidManager {
2885: my $certificate = shift;
2886:
1.163 foxr 2887: return isManager;
1.140 foxr 2888: }
2889: #
1.143 foxr 2890: # CopyFile: Called as part of the process of installing a
2891: # new configuration file. This function copies an existing
2892: # file to a backup file.
2893: # Parameters:
2894: # oldfile - Name of the file to backup.
2895: # newfile - Name of the backup file.
2896: # Return:
2897: # 0 - Failure (errno has failure reason).
2898: # 1 - Success.
2899: #
2900: sub CopyFile {
2901: my $oldfile = shift;
2902: my $newfile = shift;
2903:
2904: # The file must exist:
2905:
2906: if(-e $oldfile) {
2907:
1.178.2.4 albertel 2908: # Read the old file.
1.143 foxr 2909:
2910: my $oldfh = IO::File->new("< $oldfile");
2911: if(!$oldfh) {
2912: return 0;
2913: }
2914: my @contents = <$oldfh>; # Suck in the entire file.
2915:
2916: # write the backup file:
2917:
2918: my $newfh = IO::File->new("> $newfile");
2919: if(!(defined $newfh)){
2920: return 0;
2921: }
2922: my $lines = scalar @contents;
2923: for (my $i =0; $i < $lines; $i++) {
2924: print $newfh ($contents[$i]);
2925: }
2926:
2927: $oldfh->close;
2928: $newfh->close;
2929:
2930: chmod(0660, $newfile);
2931:
2932: return 1;
2933:
2934: } else {
2935: return 0;
2936: }
2937: }
1.157 foxr 2938: #
2939: # Host files are passed out with externally visible host IPs.
2940: # If, for example, we are behind a fire-wall or NAT host, our
2941: # internally visible IP may be different than the externally
2942: # visible IP. Therefore, we always adjust the contents of the
2943: # host file so that the entry for ME is the IP that we believe
2944: # we have. At present, this is defined as the entry that
2945: # DNS has for us. If by some chance we are not able to get a
2946: # DNS translation for us, then we assume that the host.tab file
2947: # is correct.
2948: # BUGBUGBUG - in the future, we really should see if we can
2949: # easily query the interface(s) instead.
2950: # Parameter(s):
2951: # contents - The contents of the host.tab to check.
2952: # Returns:
2953: # newcontents - The adjusted contents.
2954: #
2955: #
2956: sub AdjustHostContents {
2957: my $contents = shift;
2958: my $adjusted;
2959: my $me = $perlvar{'lonHostID'};
2960:
1.178.2.4 albertel 2961: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 2962: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
2963: chomp($line);
2964: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
2965: if ($id eq $me) {
1.178.2.4 albertel 2966: my $ip = gethostbyname($name);
2967: my $ipnew = inet_ntoa($ip);
2968: $ip = $ipnew;
1.157 foxr 2969: # Reconstruct the host line and append to adjusted:
2970:
1.178.2.4 albertel 2971: my $newline = "$id:$domain:$role:$name:$ip";
2972: if($maxcon ne "") { # Not all hosts have loncnew tuning params
2973: $newline .= ":$maxcon:$idleto:$mincon";
2974: }
2975: $adjusted .= $newline."\n";
1.157 foxr 2976:
1.178.2.4 albertel 2977: } else { # Not me, pass unmodified.
2978: $adjusted .= $line."\n";
2979: }
1.157 foxr 2980: } else { # Blank or comment never re-written.
2981: $adjusted .= $line."\n"; # Pass blanks and comments as is.
2982: }
1.178.2.4 albertel 2983: }
2984: return $adjusted;
1.157 foxr 2985: }
1.143 foxr 2986: #
2987: # InstallFile: Called to install an administrative file:
2988: # - The file is created with <name>.tmp
2989: # - The <name>.tmp file is then mv'd to <name>
2990: # This lugubrious procedure is done to ensure that we are never without
2991: # a valid, even if dated, version of the file regardless of who crashes
2992: # and when the crash occurs.
2993: #
2994: # Parameters:
2995: # Name of the file
2996: # File Contents.
2997: # Return:
2998: # nonzero - success.
2999: # 0 - failure and $! has an errno.
3000: #
3001: sub InstallFile {
3002: my $Filename = shift;
3003: my $Contents = shift;
3004: my $TempFile = $Filename.".tmp";
3005:
3006: # Open the file for write:
1.178.2.4 albertel 3007:
1.143 foxr 3008: my $fh = IO::File->new("> $TempFile"); # Write to temp.
3009: if(!(defined $fh)) {
3010: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
3011: return 0;
3012: }
3013: # write the contents of the file:
1.178.2.4 albertel 3014:
1.143 foxr 3015: print $fh ($Contents);
3016: $fh->close; # In case we ever have a filesystem w. locking
3017:
3018: chmod(0660, $TempFile);
3019:
3020: # Now we can move install the file in position.
3021:
3022: move($TempFile, $Filename);
3023:
3024: return 1;
3025: }
1.169 foxr 3026: #
3027: # ConfigFileFromSelector: converts a configuration file selector
3028: # (one of host or domain at this point) into a
3029: # configuration file pathname.
3030: #
3031: # Parameters:
3032: # selector - Configuration file selector.
3033: # Returns:
3034: # Full path to the file or undef if the selector is invalid.
3035: #
3036: sub ConfigFileFromSelector {
3037: my $selector = shift;
3038: my $tablefile;
3039:
3040: my $tabledir = $perlvar{'lonTabDir'}.'/';
3041: if ($selector eq "hosts") {
3042: $tablefile = $tabledir."hosts.tab";
3043: } elsif ($selector eq "domain") {
3044: $tablefile = $tabledir."domain.tab";
3045: } else {
3046: return undef;
3047: }
3048: return $tablefile;
1.143 foxr 3049:
1.169 foxr 3050: }
1.143 foxr 3051: #
1.141 foxr 3052: # PushFile: Called to do an administrative push of a file.
3053: # - Ensure the file being pushed is one we support.
3054: # - Backup the old file to <filename.saved>
3055: # - Separate the contents of the new file out from the
3056: # rest of the request.
3057: # - Write the new file.
3058: # Parameter:
3059: # Request - The entire user request. This consists of a : separated
3060: # string pushfile:tablename:contents.
3061: # NOTE: The contents may have :'s in it as well making things a bit
3062: # more interesting... but not much.
3063: # Returns:
3064: # String to send to client ("ok" or "refused" if bad file).
3065: #
3066: sub PushFile {
3067: my $request = shift;
3068: my ($command, $filename, $contents) = split(":", $request, 3);
3069:
3070: # At this point in time, pushes for only the following tables are
3071: # supported:
3072: # hosts.tab ($filename eq host).
3073: # domain.tab ($filename eq domain).
3074: # Construct the destination filename or reject the request.
3075: #
3076: # lonManage is supposed to ensure this, however this session could be
3077: # part of some elaborate spoof that managed somehow to authenticate.
3078: #
3079:
1.169 foxr 3080:
3081: my $tablefile = ConfigFileFromSelector($filename);
3082: if(! (defined $tablefile)) {
1.141 foxr 3083: return "refused";
3084: }
3085: #
3086: # >copy< the old table to the backup table
3087: # don't rename in case system crashes/reboots etc. in the time
3088: # window between a rename and write.
3089: #
3090: my $backupfile = $tablefile;
3091: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 3092: if(!CopyFile($tablefile, $backupfile)) {
3093: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
3094: return "error:$!";
3095: }
1.141 foxr 3096: &logthis('<font color="green"> Pushfile: backed up '
1.178.2.4 albertel 3097: .$tablefile." to $backupfile</font>");
1.141 foxr 3098:
1.157 foxr 3099: # If the file being pushed is the host file, we adjust the entry for ourself so that the
3100: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
3101: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
3102: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
3103: # that possibilty.
3104:
3105: if($filename eq "host") {
3106: $contents = AdjustHostContents($contents);
3107: }
3108:
1.141 foxr 3109: # Install the new file:
3110:
1.143 foxr 3111: if(!InstallFile($tablefile, $contents)) {
3112: &logthis('<font color="red"> Pushfile: unable to install '
1.178.2.4 albertel 3113: .$tablefile." $! </font>");
1.143 foxr 3114: return "error:$!";
1.178.2.4 albertel 3115: } else {
1.143 foxr 3116: &logthis('<font color="green"> Installed new '.$tablefile
3117: ."</font>");
1.178.2.4 albertel 3118:
1.143 foxr 3119: }
3120:
1.141 foxr 3121:
3122: # Indicate success:
3123:
3124: return "ok";
3125:
3126: }
1.145 foxr 3127:
3128: #
3129: # Called to re-init either lonc or lond.
3130: #
3131: # Parameters:
3132: # request - The full request by the client. This is of the form
3133: # reinit:<process>
3134: # where <process> is allowed to be either of
3135: # lonc or lond
3136: #
3137: # Returns:
3138: # The string to be sent back to the client either:
3139: # ok - Everything worked just fine.
3140: # error:why - There was a failure and why describes the reason.
3141: #
3142: #
3143: sub ReinitProcess {
3144: my $request = shift;
3145:
1.146 foxr 3146:
3147: # separate the request (reinit) from the process identifier and
3148: # validate it producing the name of the .pid file for the process.
3149: #
3150: #
3151: my ($junk, $process) = split(":", $request);
1.147 foxr 3152: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 3153: if($process eq 'lonc') {
3154: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 3155: if (!open(PIDFILE, "< $processpidfile")) {
3156: return "error:Open failed for $processpidfile";
3157: }
3158: my $loncpid = <PIDFILE>;
3159: close(PIDFILE);
3160: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
3161: ."</font>");
3162: kill("USR2", $loncpid);
1.146 foxr 3163: } elsif ($process eq 'lond') {
1.147 foxr 3164: logthis('<font color="red"> Reinitializing self (lond) </font>');
3165: &UpdateHosts; # Lond is us!!
1.146 foxr 3166: } else {
3167: &logthis('<font color="yellow" Invalid reinit request for '.$process
3168: ."</font>");
3169: return "error:Invalid process identifier $process";
3170: }
1.145 foxr 3171: return 'ok';
3172: }
1.168 foxr 3173: # Validate a line in a configuration file edit script:
3174: # Validation includes:
3175: # - Ensuring the command is valid.
3176: # - Ensuring the command has sufficient parameters
3177: # Parameters:
3178: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 3179: #
1.168 foxr 3180: # Return:
3181: # 0 - Invalid scriptline.
3182: # 1 - Valid scriptline
3183: # NOTE:
3184: # Only the command syntax is checked, not the executability of the
3185: # command.
3186: #
3187: sub isValidEditCommand {
3188: my $scriptline = shift;
3189:
3190: # Line elements are pipe separated:
3191:
3192: my ($command, $key, $newline) = split(/\|/, $scriptline);
3193: &logthis('<font color="green"> isValideditCommand checking: '.
3194: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
3195:
3196: if ($command eq "delete") {
3197: #
3198: # key with no newline.
3199: #
3200: if( ($key eq "") || ($newline ne "")) {
3201: return 0; # Must have key but no newline.
3202: } else {
3203: return 1; # Valid syntax.
3204: }
1.169 foxr 3205: } elsif ($command eq "replace") {
1.168 foxr 3206: #
3207: # key and newline:
3208: #
3209: if (($key eq "") || ($newline eq "")) {
3210: return 0;
3211: } else {
3212: return 1;
3213: }
1.169 foxr 3214: } elsif ($command eq "append") {
3215: if (($key ne "") && ($newline eq "")) {
3216: return 1;
3217: } else {
3218: return 0;
3219: }
1.168 foxr 3220: } else {
3221: return 0; # Invalid command.
3222: }
3223: return 0; # Should not get here!!!
3224: }
1.169 foxr 3225: #
3226: # ApplyEdit - Applies an edit command to a line in a configuration
3227: # file. It is the caller's responsiblity to validate the
3228: # edit line.
3229: # Parameters:
3230: # $directive - A single edit directive to apply.
3231: # Edit directives are of the form:
3232: # append|newline - Appends a new line to the file.
3233: # replace|key|newline - Replaces the line with key value 'key'
3234: # delete|key - Deletes the line with key value 'key'.
3235: # $editor - A config file editor object that contains the
3236: # file being edited.
3237: #
3238: sub ApplyEdit {
3239: my $directive = shift;
3240: my $editor = shift;
3241:
3242: # Break the directive down into its command and its parameters
3243: # (at most two at this point. The meaning of the parameters, if in fact
3244: # they exist depends on the command).
3245:
3246: my ($command, $p1, $p2) = split(/\|/, $directive);
3247:
3248: if($command eq "append") {
3249: $editor->Append($p1); # p1 - key p2 null.
3250: } elsif ($command eq "replace") {
3251: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
3252: } elsif ($command eq "delete") {
3253: $editor->DeleteLine($p1); # p1 - key p2 null.
3254: } else { # Should not get here!!!
1.178.2.4 albertel 3255: die "Invalid command given to ApplyEdit $command";
1.169 foxr 3256: }
3257: }
3258: #
3259: # AdjustOurHost:
3260: # Adjusts a host file stored in a configuration file editor object
3261: # for the true IP address of this host. This is necessary for hosts
3262: # that live behind a firewall.
3263: # Those hosts have a publicly distributed IP of the firewall, but
3264: # internally must use their actual IP. We assume that a given
3265: # host only has a single IP interface for now.
3266: # Formal Parameters:
3267: # editor - The configuration file editor to adjust. This
3268: # editor is assumed to contain a hosts.tab file.
3269: # Strategy:
3270: # - Figure out our hostname.
3271: # - Lookup the entry for this host.
3272: # - Modify the line to contain our IP
3273: # - Do a replace for this host.
3274: sub AdjustOurHost {
3275: my $editor = shift;
3276:
3277: # figure out who I am.
3278:
3279: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
3280:
3281: # Get my host file entry.
3282:
3283: my $ConfigLine = $editor->Find($myHostName);
3284: if(! (defined $ConfigLine)) {
3285: die "AdjustOurHost - no entry for me in hosts file $myHostName";
3286: }
3287: # figure out my IP:
3288: # Use the config line to get my hostname.
3289: # Use gethostbyname to translate that into an IP address.
3290: #
3291: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
3292: my $BinaryIp = gethostbyname($name);
3293: my $ip = inet_ntoa($ip);
3294: #
3295: # Reassemble the config line from the elements in the list.
3296: # Note that if the loncnew items were not present before, they will
3297: # be now even if they would be empty
3298: #
3299: my $newConfigLine = $id;
3300: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
3301: $newConfigLine .= ":".$item;
3302: }
3303: # Replace the line:
3304:
3305: $editor->ReplaceLine($id, $newConfigLine);
3306:
3307: }
3308: #
3309: # ReplaceConfigFile:
3310: # Replaces a configuration file with the contents of a
3311: # configuration file editor object.
3312: # This is done by:
3313: # - Copying the target file to <filename>.old
3314: # - Writing the new file to <filename>.tmp
3315: # - Moving <filename.tmp> -> <filename>
3316: # This laborious process ensures that the system is never without
3317: # a configuration file that's at least valid (even if the contents
3318: # may be dated).
3319: # Parameters:
3320: # filename - Name of the file to modify... this is a full path.
3321: # editor - Editor containing the file.
3322: #
3323: sub ReplaceConfigFile {
3324: my $filename = shift;
3325: my $editor = shift;
1.168 foxr 3326:
1.169 foxr 3327: CopyFile ($filename, $filename.".old");
3328:
3329: my $contents = $editor->Get(); # Get the contents of the file.
3330:
3331: InstallFile($filename, $contents);
3332: }
1.168 foxr 3333: #
3334: #
3335: # Called to edit a configuration table file
1.167 foxr 3336: # Parameters:
3337: # request - The entire command/request sent by lonc or lonManage
3338: # Return:
3339: # The reply to send to the client.
1.168 foxr 3340: #
1.167 foxr 3341: sub EditFile {
3342: my $request = shift;
3343:
3344: # Split the command into it's pieces: edit:filetype:script
3345:
1.168 foxr 3346: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 3347:
3348: # Check the pre-coditions for success:
3349:
3350: if($request != "edit") { # Something is amiss afoot alack.
3351: return "error:edit request detected, but request != 'edit'\n";
3352: }
3353: if( ($filetype ne "hosts") &&
3354: ($filetype ne "domain")) {
3355: return "error:edit requested with invalid file specifier: $filetype \n";
3356: }
3357:
3358: # Split the edit script and check it's validity.
1.168 foxr 3359:
3360: my @scriptlines = split(/\n/, $script); # one line per element.
3361: my $linecount = scalar(@scriptlines);
3362: for(my $i = 0; $i < $linecount; $i++) {
3363: chomp($scriptlines[$i]);
3364: if(!isValidEditCommand($scriptlines[$i])) {
3365: return "error:edit with bad script line: '$scriptlines[$i]' \n";
3366: }
3367: }
1.145 foxr 3368:
1.167 foxr 3369: # Execute the edit operation.
1.169 foxr 3370: # - Create a config file editor for the appropriate file and
3371: # - execute each command in the script:
3372: #
3373: my $configfile = ConfigFileFromSelector($filetype);
3374: if (!(defined $configfile)) {
3375: return "refused\n";
3376: }
3377: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 3378:
1.169 foxr 3379: for (my $i = 0; $i < $linecount; $i++) {
3380: ApplyEdit($scriptlines[$i], $editor);
3381: }
3382: # If the file is the host file, ensure that our host is
3383: # adjusted to have our ip:
3384: #
3385: if($filetype eq "host") {
3386: AdjustOurHost($editor);
3387: }
3388: # Finally replace the current file with our file.
3389: #
3390: ReplaceConfigFile($configfile, $editor);
1.167 foxr 3391:
3392: return "ok\n";
3393: }
1.141 foxr 3394: #
1.96 foxr 3395: # Convert an error return code from lcpasswd to a string value.
3396: #
3397: sub lcpasswdstrerror {
3398: my $ErrorCode = shift;
1.97 foxr 3399: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 3400: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3401: } else {
1.98 foxr 3402: return $passwderrors[$ErrorCode];
1.96 foxr 3403: }
3404: }
3405:
1.97 foxr 3406: #
3407: # Convert an error return code from lcuseradd to a string value:
3408: #
3409: sub lcuseraddstrerror {
3410: my $ErrorCode = shift;
3411: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3412: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3413: } else {
1.98 foxr 3414: return $adderrors[$ErrorCode];
1.97 foxr 3415: }
3416: }
3417:
1.23 harris41 3418: # grabs exception and records it to log before exiting
3419: sub catchexception {
1.27 albertel 3420: my ($error)=@_;
1.25 www 3421: $SIG{'QUIT'}='DEFAULT';
3422: $SIG{__DIE__}='DEFAULT';
1.165 albertel 3423: &status("Catching exception");
1.23 harris41 3424: &logthis("<font color=red>CRITICAL: "
1.178.2.4 albertel 3425: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
3426: ."a crash with this error msg->[$error]</font>");
1.57 www 3427: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 3428: if ($client) { print $client "error: $error\n"; }
1.59 www 3429: $server->close();
1.27 albertel 3430: die($error);
1.23 harris41 3431: }
3432:
1.63 www 3433: sub timeout {
1.165 albertel 3434: &status("Handling Timeout");
1.63 www 3435: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
3436: &catchexception('Timeout');
3437: }
1.22 harris41 3438: # -------------------------------- Set signal handlers to record abnormal exits
3439:
3440: $SIG{'QUIT'}=\&catchexception;
3441: $SIG{__DIE__}=\&catchexception;
3442:
1.81 matthew 3443: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 3444: &status("Read loncapa.conf and loncapa_apache.conf");
3445: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 3446: %perlvar=%{$perlvarref};
1.80 harris41 3447: undef $perlvarref;
1.19 www 3448:
1.35 harris41 3449: # ----------------------------- Make sure this process is running from user=www
3450: my $wwwid=getpwnam('www');
3451: if ($wwwid!=$<) {
1.178.2.4 albertel 3452: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3453: my $subj="LON: $currenthostid User ID mismatch";
3454: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 3455: mailto $emailto -s '$subj' > /dev/null");
1.178.2.4 albertel 3456: exit 1;
1.35 harris41 3457: }
3458:
1.19 www 3459: # --------------------------------------------- Check if other instance running
3460:
3461: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3462:
3463: if (-e $pidfile) {
1.178.2.4 albertel 3464: my $lfh=IO::File->new("$pidfile");
3465: my $pide=<$lfh>;
3466: chomp($pide);
3467: if (kill 0 => $pide) { die "already running"; }
1.19 www 3468: }
1.1 albertel 3469:
3470: # ------------------------------------------------------------- Read hosts file
3471:
3472:
3473:
3474: # establish SERVER socket, bind and listen.
3475: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3476: Type => SOCK_STREAM,
3477: Proto => 'tcp',
3478: Reuse => 1,
3479: Listen => 10 )
1.178.2.4 albertel 3480: or die "making socket: $@\n";
1.1 albertel 3481:
3482: # --------------------------------------------------------- Do global variables
3483:
3484: # global variables
3485:
1.134 albertel 3486: my %children = (); # keys are current child process IDs
1.178.2.1 foxr 3487: my $children = 0; # current number of children
1.1 albertel 3488:
3489: sub REAPER { # takes care of dead children
3490: $SIG{CHLD} = \&REAPER;
1.165 albertel 3491: &status("Handling child death");
1.178.2.1 foxr 3492: my $pid = wait;
3493: if (defined($children{$pid})) {
3494: &logthis("Child $pid died");
3495: $children --;
3496: delete $children{$pid};
3497: } else {
3498: &logthis("Unknown Child $pid died");
1.176 albertel 3499: }
1.165 albertel 3500: &status("Finished Handling child death");
1.1 albertel 3501: }
3502:
3503: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 3504: &status("Killing children (INT)");
1.1 albertel 3505: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3506: kill 'INT' => keys %children;
1.59 www 3507: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 3508: my $execdir=$perlvar{'lonDaemons'};
3509: unlink("$execdir/logs/lond.pid");
1.9 www 3510: &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.165 albertel 3511: &status("Done killing children");
1.1 albertel 3512: exit; # clean up with dignity
3513: }
3514:
3515: sub HUPSMAN { # signal handler for SIGHUP
3516: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 3517: &status("Killing children for restart (HUP)");
1.1 albertel 3518: kill 'INT' => keys %children;
1.59 www 3519: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9 www 3520: &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134 albertel 3521: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 3522: unlink("$execdir/logs/lond.pid");
1.165 albertel 3523: &status("Restarting self (HUP)");
1.1 albertel 3524: exec("$execdir/lond"); # here we go again
3525: }
3526:
1.144 foxr 3527: #
1.148 foxr 3528: # Kill off hashes that describe the host table prior to re-reading it.
3529: # Hashes affected are:
3530: # %hostid, %hostdom %hostip
3531: #
3532: sub KillHostHashes {
3533: foreach my $key (keys %hostid) {
3534: delete $hostid{$key};
3535: }
3536: foreach my $key (keys %hostdom) {
3537: delete $hostdom{$key};
3538: }
3539: foreach my $key (keys %hostip) {
3540: delete $hostip{$key};
3541: }
3542: }
3543: #
3544: # Read in the host table from file and distribute it into the various hashes:
3545: #
3546: # - %hostid - Indexed by IP, the loncapa hostname.
3547: # - %hostdom - Indexed by loncapa hostname, the domain.
3548: # - %hostip - Indexed by hostid, the Ip address of the host.
3549: sub ReadHostTable {
3550:
3551: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
3552:
3553: while (my $configline=<CONFIG>) {
1.178.2.1 foxr 3554: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3555: chomp($ip); $ip=~s/\D+$//;
3556: $hostid{$ip}=$id;
3557: $hostdom{$id}=$domain;
3558: $hostip{$id}=$ip;
3559: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
1.148 foxr 3560: }
3561: close(CONFIG);
3562: }
3563: #
3564: # Reload the Apache daemon's state.
1.150 foxr 3565: # This is done by invoking /home/httpd/perl/apachereload
3566: # a setuid perl script that can be root for us to do this job.
1.148 foxr 3567: #
3568: sub ReloadApache {
1.150 foxr 3569: my $execdir = $perlvar{'lonDaemons'};
3570: my $script = $execdir."/apachereload";
3571: system($script);
1.148 foxr 3572: }
3573:
3574: #
1.144 foxr 3575: # Called in response to a USR2 signal.
3576: # - Reread hosts.tab
3577: # - All children connected to hosts that were removed from hosts.tab
3578: # are killed via SIGINT
3579: # - All children connected to previously existing hosts are sent SIGUSR1
3580: # - Our internal hosts hash is updated to reflect the new contents of
3581: # hosts.tab causing connections from hosts added to hosts.tab to
3582: # now be honored.
3583: #
3584: sub UpdateHosts {
1.165 albertel 3585: &status("Reload hosts.tab");
1.147 foxr 3586: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 3587: #
3588: # The %children hash has the set of IP's we currently have children
3589: # on. These need to be matched against records in the hosts.tab
3590: # Any ip's no longer in the table get killed off they correspond to
3591: # either dropped or changed hosts. Note that the re-read of the table
3592: # will take care of new and changed hosts as connections come into being.
3593:
3594:
3595: KillHostHashes;
3596: ReadHostTable;
3597:
3598: foreach my $child (keys %children) {
3599: my $childip = $children{$child};
3600: if(!$hostid{$childip}) {
1.149 foxr 3601: logthis('<font color="blue"> UpdateHosts killing child '
3602: ." $child for ip $childip </font>");
1.148 foxr 3603: kill('INT', $child);
1.149 foxr 3604: } else {
3605: logthis('<font color="green"> keeping child for ip '
3606: ." $childip (pid=$child) </font>");
1.148 foxr 3607: }
3608: }
3609: ReloadApache;
1.165 albertel 3610: &status("Finished reloading hosts.tab");
1.144 foxr 3611: }
3612:
1.148 foxr 3613:
1.57 www 3614: sub checkchildren {
1.165 albertel 3615: &status("Checking on the children (sending signals)");
1.57 www 3616: &initnewstatus();
3617: &logstatus();
3618: &logthis('Going to check on the children');
1.134 albertel 3619: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 3620: foreach (sort keys %children) {
1.57 www 3621: sleep 1;
3622: unless (kill 'USR1' => $_) {
3623: &logthis ('Child '.$_.' is dead');
3624: &logstatus($$.' is dead');
3625: }
1.61 harris41 3626: }
1.63 www 3627: sleep 5;
1.113 albertel 3628: $SIG{ALRM} = sub { die "timeout" };
3629: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 3630: &status("Checking on the children (waiting for reports)");
1.63 www 3631: foreach (sort keys %children) {
3632: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.178.2.4 albertel 3633: eval {
3634: alarm(300);
3635: &logthis('Child '.$_.' did not respond');
3636: kill 9 => $_;
3637: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3638: #$subj="LON: $currenthostid killed lond process $_";
3639: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3640: #$execdir=$perlvar{'lonDaemons'};
3641: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3642: alarm(0);
3643: }
1.63 www 3644: }
3645: }
1.113 albertel 3646: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 3647: $SIG{__DIE__} = \&catchexception;
1.165 albertel 3648: &status("Finished checking children");
1.57 www 3649: }
3650:
1.1 albertel 3651: # --------------------------------------------------------------------- Logging
3652:
3653: sub logthis {
3654: my $message=shift;
3655: my $execdir=$perlvar{'lonDaemons'};
3656: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3657: my $now=time;
3658: my $local=localtime($now);
1.58 www 3659: $lastlog=$local.': '.$message;
1.1 albertel 3660: print $fh "$local ($$): $message\n";
3661: }
3662:
1.77 foxr 3663: # ------------------------- Conditional log if $DEBUG true.
3664: sub Debug {
3665: my $message = shift;
3666: if($DEBUG) {
3667: &logthis($message);
3668: }
3669: }
1.161 foxr 3670:
3671: #
3672: # Sub to do replies to client.. this gives a hook for some
3673: # debug tracing too:
3674: # Parameters:
3675: # fd - File open on client.
3676: # reply - Text to send to client.
3677: # request - Original request from client.
3678: #
1.178.2.1 foxr 3679: # Note: This increments Transactions
3680: #
1.161 foxr 3681: sub Reply {
1.178.2.1 foxr 3682: alarm(120);
1.161 foxr 3683: my $fd = shift;
3684: my $reply = shift;
3685: my $request = shift;
3686:
3687: print $fd $reply;
3688: Debug("Request was $request Reply was $reply");
3689:
1.178.2.1 foxr 3690: $Transactions++;
3691: alarm(0);
3692:
3693:
3694: }
3695: #
3696: # Sub to report a failure.
3697: # This function:
3698: # - Increments the failure statistic counters.
3699: # - Invokes Reply to send the error message to the client.
3700: # Parameters:
3701: # fd - File descriptor open on the client
3702: # reply - Reply text to emit.
3703: # request - The original request message (used by Reply
3704: # to debug if that's enabled.
3705: # Implicit outputs:
3706: # $Failures- The number of failures is incremented.
3707: # Reply (invoked here) sends a message to the
3708: # client:
3709: #
3710: sub Failure {
1.178.2.4 albertel 3711: my $fd = shift;
3712: my $reply = shift;
3713: my $request = shift;
1.178.2.1 foxr 3714:
1.178.2.4 albertel 3715: $Failures++;
3716: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 3717: }
1.57 www 3718: # ------------------------------------------------------------------ Log status
3719:
3720: sub logstatus {
1.178.2.4 albertel 3721: &status("Doing logging");
3722: my $docdir=$perlvar{'lonDocRoot'};
3723: {
3724: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
3725: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
3726: $fh->close();
3727: }
3728: &status("Finished londstatus.txt");
3729: {
3730: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3731: print $fh $status."\n".$lastlog."\n".time;
3732: $fh->close();
3733: }
3734: ResetStatistics;
3735: &status("Finished logging");
1.178.2.1 foxr 3736:
1.57 www 3737: }
3738:
3739: sub initnewstatus {
3740: my $docdir=$perlvar{'lonDocRoot'};
3741: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3742: my $now=time;
3743: my $local=localtime($now);
3744: print $fh "LOND status $local - parent $$\n\n";
1.64 www 3745: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 3746: while (my $filename=readdir(DIR)) {
1.64 www 3747: unlink("$docdir/lon-status/londchld/$filename");
3748: }
3749: closedir(DIR);
1.57 www 3750: }
3751:
3752: # -------------------------------------------------------------- Status setting
3753:
3754: sub status {
3755: my $what=shift;
3756: my $now=time;
3757: my $local=localtime($now);
1.178.2.1 foxr 3758: my $status = "lond: $what $local ";
3759: if($Transactions) {
1.178.2.4 albertel 3760: $status .= " Transactions: $Transactions Failed; $Failures";
1.178.2.1 foxr 3761: }
3762: $0=$status;
1.57 www 3763: }
1.11 www 3764:
3765: # -------------------------------------------------------- Escape Special Chars
3766:
3767: sub escape {
3768: my $str=shift;
3769: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3770: return $str;
3771: }
3772:
3773: # ----------------------------------------------------- Un-Escape Special Chars
3774:
3775: sub unescape {
3776: my $str=shift;
3777: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3778: return $str;
3779: }
3780:
1.1 albertel 3781: # ----------------------------------------------------------- Send USR1 to lonc
3782:
3783: sub reconlonc {
3784: my $peerfile=shift;
3785: &logthis("Trying to reconnect for $peerfile");
3786: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3787: if (my $fh=IO::File->new("$loncfile")) {
3788: my $loncpid=<$fh>;
3789: chomp($loncpid);
3790: if (kill 0 => $loncpid) {
3791: &logthis("lonc at pid $loncpid responding, sending USR1");
3792: kill USR1 => $loncpid;
3793: } else {
1.178.2.4 albertel 3794: &logthis("<font color=red>CRITICAL: "
3795: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 3796: }
3797: } else {
1.178.2.4 albertel 3798: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1 albertel 3799: }
3800: }
3801:
3802: # -------------------------------------------------- Non-critical communication
1.11 www 3803:
1.1 albertel 3804: sub subreply {
3805: my ($cmd,$server)=@_;
3806: my $peerfile="$perlvar{'lonSockDir'}/$server";
3807: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3808: Type => SOCK_STREAM,
3809: Timeout => 10)
1.178.2.4 albertel 3810: or return "con_lost";
1.1 albertel 3811: print $sclient "$cmd\n";
3812: my $answer=<$sclient>;
3813: chomp($answer);
3814: if (!$answer) { $answer="con_lost"; }
3815: return $answer;
3816: }
3817:
3818: sub reply {
1.178.2.4 albertel 3819: my ($cmd,$server)=@_;
3820: my $answer;
3821: if ($server ne $currenthostid) {
3822: $answer=subreply($cmd,$server);
3823: if ($answer eq 'con_lost') {
3824: $answer=subreply("ping",$server);
3825: if ($answer ne $server) {
3826: &logthis("sub reply: answer != server answer is $answer, server is $server");
3827: &reconlonc("$perlvar{'lonSockDir'}/$server");
3828: }
3829: $answer=subreply($cmd,$server);
3830: }
3831: } else {
3832: $answer='self_reply';
3833: }
3834: return $answer;
1.1 albertel 3835: }
3836:
1.13 www 3837: # -------------------------------------------------------------- Talk to lonsql
3838:
1.12 harris41 3839: sub sqlreply {
3840: my ($cmd)=@_;
3841: my $answer=subsqlreply($cmd);
3842: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3843: return $answer;
3844: }
3845:
3846: sub subsqlreply {
3847: my ($cmd)=@_;
3848: my $unixsock="mysqlsock";
3849: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3850: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3851: Type => SOCK_STREAM,
3852: Timeout => 10)
1.178.2.4 albertel 3853: or return "con_lost";
1.12 harris41 3854: print $sclient "$cmd\n";
3855: my $answer=<$sclient>;
3856: chomp($answer);
3857: if (!$answer) { $answer="con_lost"; }
3858: return $answer;
3859: }
3860:
1.1 albertel 3861: # -------------------------------------------- Return path to profile directory
1.11 www 3862:
1.1 albertel 3863: sub propath {
3864: my ($udom,$uname)=@_;
3865: $udom=~s/\W//g;
3866: $uname=~s/\W//g;
1.16 www 3867: my $subdir=$uname.'__';
1.1 albertel 3868: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3869: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3870: return $proname;
3871: }
3872:
3873: # --------------------------------------- Is this the home server of an author?
1.11 www 3874:
1.1 albertel 3875: sub ishome {
3876: my $author=shift;
3877: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3878: my ($udom,$uname)=split(/\//,$author);
3879: my $proname=propath($udom,$uname);
3880: if (-e $proname) {
3881: return 'owner';
3882: } else {
3883: return 'not_owner';
3884: }
3885: }
3886:
3887: # ======================================================= Continue main program
3888: # ---------------------------------------------------- Fork once and dissociate
3889:
1.134 albertel 3890: my $fpid=fork;
1.1 albertel 3891: exit if $fpid;
1.29 harris41 3892: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 3893:
1.29 harris41 3894: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 3895:
3896: # ------------------------------------------------------- Write our PID on disk
3897:
1.134 albertel 3898: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 3899: open (PIDSAVE,">$execdir/logs/lond.pid");
3900: print PIDSAVE "$$\n";
3901: close(PIDSAVE);
1.9 www 3902: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57 www 3903: &status('Starting');
1.1 albertel 3904:
1.106 foxr 3905:
1.1 albertel 3906:
3907: # ----------------------------------------------------- Install signal handlers
3908:
1.57 www 3909:
1.1 albertel 3910: $SIG{CHLD} = \&REAPER;
3911: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3912: $SIG{HUP} = \&HUPSMAN;
1.57 www 3913: $SIG{USR1} = \&checkchildren;
1.144 foxr 3914: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 3915:
1.148 foxr 3916: # Read the host hashes:
3917:
3918: ReadHostTable;
1.106 foxr 3919:
1.178.2.1 foxr 3920:
1.106 foxr 3921: # --------------------------------------------------------------
3922: # Accept connections. When a connection comes in, it is validated
3923: # and if good, a child process is created to process transactions
3924: # along the connection.
3925:
1.1 albertel 3926: while (1) {
1.165 albertel 3927: &status('Starting accept');
1.106 foxr 3928: $client = $server->accept() or next;
1.165 albertel 3929: &status('Accepted '.$client.' off to spawn');
1.106 foxr 3930: make_new_child($client);
1.165 albertel 3931: &status('Finished spawning');
1.1 albertel 3932: }
3933:
3934: sub make_new_child {
3935: my $pid;
3936: my $sigset;
1.106 foxr 3937:
3938: $client = shift;
1.165 albertel 3939: &status('Starting new child '.$client);
1.161 foxr 3940: &logthis('<font color="green"> Attempting to start child ('.$client.
3941: ")</font>");
1.1 albertel 3942: # block signal for fork
3943: $sigset = POSIX::SigSet->new(SIGINT);
3944: sigprocmask(SIG_BLOCK, $sigset)
1.29 harris41 3945: or die "Can't block SIGINT for fork: $!\n";
1.178.2.4 albertel 3946:
1.29 harris41 3947: die "fork: $!" unless defined ($pid = fork);
1.148 foxr 3948:
3949: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3950: # connection liveness.
3951:
3952: #
3953: # Figure out who we're talking to so we can record the peer in
3954: # the pid hash.
3955: #
3956: my $caller = getpeername($client);
3957: my ($port,$iaddr)=unpack_sockaddr_in($caller);
3958: $clientip=inet_ntoa($iaddr);
1.1 albertel 3959:
3960: if ($pid) {
3961: # Parent records the child's birth and returns.
3962: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 3963: or die "Can't unblock SIGINT for fork: $!\n";
1.148 foxr 3964: $children{$pid} = $clientip;
1.178.2.1 foxr 3965: $children++;
1.57 www 3966: &status('Started child '.$pid);
1.1 albertel 3967: return;
3968: } else {
3969: # Child can *not* return from this subroutine.
3970: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1.126 albertel 3971: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3972: #don't get intercepted
1.57 www 3973: $SIG{USR1}= \&logstatus;
1.63 www 3974: $SIG{ALRM}= \&timeout;
1.57 www 3975: $lastlog='Forked ';
3976: $status='Forked';
3977:
1.1 albertel 3978: # unblock signals
3979: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 3980: or die "Can't unblock SIGINT for fork: $!\n";
1.13 www 3981:
1.178.2.1 foxr 3982:
3983:
1.91 albertel 3984: &Authen::Krb5::init_context();
3985: &Authen::Krb5::init_ets();
1.178.2.4 albertel 3986:
1.161 foxr 3987: &status('Accepted connection');
1.1 albertel 3988: # =============================================================================
3989: # do something with the connection
3990: # -----------------------------------------------------------------------------
1.148 foxr 3991: # see if we know client and check for spoof IP by challenge
3992:
1.161 foxr 3993: ReadManagerTable; # May also be a manager!!
3994:
3995: my $clientrec=($hostid{$clientip} ne undef);
3996: my $ismanager=($managers{$clientip} ne undef);
3997: $clientname = "[unknonwn]";
3998: if($clientrec) { # Establish client type.
3999: $ConnectionType = "client";
4000: $clientname = $hostid{$clientip};
4001: if($ismanager) {
4002: $ConnectionType = "both";
4003: }
4004: } else {
4005: $ConnectionType = "manager";
4006: $clientname = $managers{$clientip};
4007: }
4008: my $clientok;
4009: if ($clientrec || $ismanager) {
4010: &status("Waiting for init from $clientip $clientname");
4011: &logthis('<font color="yellow">INFO: Connection, '.
4012: $clientip.
1.178.2.4 albertel 4013: " ($clientname) connection type = $ConnectionType </font>" );
1.161 foxr 4014: &status("Connecting $clientip ($clientname))");
4015: my $remotereq=<$client>;
4016: $remotereq=~s/[^\w:]//g;
4017: if ($remotereq =~ /^init/) {
4018: &sethost("sethost:$perlvar{'lonHostID'}");
4019: my $challenge="$$".time;
4020: print $client "$challenge\n";
1.178.2.4 albertel 4021: &status("Waiting for challenge reply from $clientip ($clientname)");
1.161 foxr 4022: $remotereq=<$client>;
4023: $remotereq=~s/\W//g;
4024: if ($challenge eq $remotereq) {
4025: $clientok=1;
4026: print $client "ok\n";
4027: } else {
1.178.2.4 albertel 4028: &logthis("<font color=blue>WARNING: $clientip did not reply challenge</font>");
1.161 foxr 4029: &status('No challenge reply '.$clientip);
4030: }
1.2 www 4031: } else {
1.178.2.4 albertel 4032: &logthis("<font color=blue>WARNING: "
1.161 foxr 4033: ."$clientip failed to initialize: >$remotereq< </font>");
4034: &status('No init '.$clientip);
4035: }
4036: } else {
1.178.2.4 albertel 4037: &logthis("<font color=blue>WARNING: Unknown client $clientip</font>");
1.161 foxr 4038: &status('Hung up on '.$clientip);
4039: }
4040: if ($clientok) {
1.1 albertel 4041: # ---------------- New known client connecting, could mean machine online again
1.161 foxr 4042:
4043: foreach my $id (keys(%hostip)) {
4044: if ($hostip{$id} ne $clientip ||
4045: $hostip{$currenthostid} eq $clientip) {
4046: # no need to try to do recon's to myself
4047: next;
1.115 albertel 4048: }
1.161 foxr 4049: &reconlonc("$perlvar{'lonSockDir'}/$id");
4050: }
4051: &logthis("<font color=green>Established connection: $clientname</font>");
4052: &status('Will listen to '.$clientname);
4053:
1.178.2.1 foxr 4054: ResetStatistics();
1.161 foxr 4055:
1.178.2.1 foxr 4056: # ------------------------------------------------------------ Process requests
4057: my $KeepGoing = 1;
4058: while ((my $userinput=GetRequest) && $KeepGoing) {
4059: $KeepGoing = ProcessRequest($userinput);
1.177 foxr 4060: # -------------------------------------------------------------------- complete
1.178.2.1 foxr 4061:
1.161 foxr 4062: &status('Listening to '.$clientname);
4063: }
1.59 www 4064: # --------------------------------------------- client unknown or fishy, refuse
1.161 foxr 4065: } else {
4066: print $client "refused\n";
4067: $client->close();
4068: &logthis("<font color=blue>WARNING: "
4069: ."Rejected client $clientip, closing connection</font>");
4070: }
4071: }
4072:
1.1 albertel 4073: # =============================================================================
1.161 foxr 4074:
4075: &logthis("<font color=red>CRITICAL: "
4076: ."Disconnect from $clientip ($clientname)</font>");
4077:
4078:
4079: # this exit is VERY important, otherwise the child will become
4080: # a producer of more and more children, forking yourself into
4081: # process death.
4082: exit;
1.106 foxr 4083:
1.78 foxr 4084: }
4085:
4086:
4087: #
4088: # Checks to see if the input roleput request was to set
4089: # an author role. If so, invokes the lchtmldir script to set
4090: # up a correct public_html
4091: # Parameters:
4092: # request - The request sent to the rolesput subchunk.
4093: # We're looking for /domain/_au
4094: # domain - The domain in which the user is having roles doctored.
4095: # user - Name of the user for which the role is being put.
4096: # authtype - The authentication type associated with the user.
4097: #
1.178.2.4 albertel 4098: sub ManagePermissions {
1.78 foxr 4099: my $request = shift;
4100: my $domain = shift;
4101: my $user = shift;
4102: my $authtype= shift;
4103:
4104: # See if the request is of the form /$domain/_au
1.178.2.1 foxr 4105: &logthis("ruequest is $request");
1.78 foxr 4106: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4107: my $execdir = $perlvar{'lonDaemons'};
4108: my $userhome= "/home/$user" ;
1.134 albertel 4109: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 4110: system("$execdir/lchtmldir $userhome $user $authtype");
4111: }
4112: }
1.178.2.8! foxr 4113:
! 4114: #
! 4115: # Return the full path of a user password file, whether it exists or not.
! 4116: # Parameters:
! 4117: # domain - Domain in which the password file lives.
! 4118: # user - name of the user.
! 4119: # Returns:
! 4120: # Full passwd path:
! 4121: #
! 4122: sub PasswordPath {
! 4123: my $domain = shift;
! 4124: my $user = shift;
! 4125:
! 4126: my $path = &propath($domain, $user);
! 4127: my $path .= "/passwd";
! 4128:
! 4129: return $path;
! 4130: }
! 4131:
! 4132: # Password Filename
! 4133: # Returns the path to a passwd file given domain and user... only if
! 4134: # it exists.
! 4135: # Parameters:
! 4136: # domain - Domain in which to search.
! 4137: # user - username.
! 4138: # Returns:
! 4139: # - If the password file exists returns its path.
! 4140: # - If the password file does not exist, returns undefined.
! 4141: #
! 4142: sub PasswordFilename {
! 4143: my $domain = shift;
! 4144: my $user = shift;
! 4145:
! 4146: my $path = PasswordPath($domain, $user);
! 4147:
! 4148: if(-e $path) {
! 4149: return $path;
! 4150: } else {
! 4151: return undef;
! 4152: }
! 4153: }
! 4154:
! 4155: #
! 4156: # Rewrite the contents of the user's passwd file.
! 4157: # Parameters:
! 4158: # domain - domain of the user.
! 4159: # name - User's name.
! 4160: # contents - New contents of the file.
! 4161: # Returns:
! 4162: # 0 - Failed.
! 4163: # 1 - Success.
! 4164: #
! 4165: sub RewritePwFile {
! 4166: my $domain = shift;
! 4167: my $user = shift;
! 4168: my $contents = shift;
! 4169:
! 4170: my $file = PasswordFilename($domain, $user);
! 4171: if (defined $file) {
! 4172: my $pf = IO::File->new(">$file");
! 4173: if($pf) {
! 4174: print $pf "$contents\n";
! 4175: return 1;
! 4176: } else {
! 4177: return 0;
! 4178: }
! 4179: } else {
! 4180: return 0;
! 4181: }
! 4182:
! 4183: }
1.78 foxr 4184: #
4185: # GetAuthType - Determines the authorization type of a user in a domain.
4186:
4187: # Returns the authorization type or nouser if there is no such user.
4188: #
1.178.2.4 albertel 4189: sub GetAuthType {
1.78 foxr 4190: my $domain = shift;
4191: my $user = shift;
4192:
1.79 foxr 4193: Debug("GetAuthType( $domain, $user ) \n");
1.178.2.8! foxr 4194: my $passwdfile = PasswordFilename($domain, $user);
! 4195: if( defined $passwdfile ) {
1.78 foxr 4196: my $pf = IO::File->new($passwdfile);
4197: my $realpassword = <$pf>;
4198: chomp($realpassword);
1.79 foxr 4199: Debug("Password info = $realpassword\n");
1.178.2.8! foxr 4200: return $realpassword;
1.178.2.4 albertel 4201: } else {
1.79 foxr 4202: Debug("Returning nouser");
1.78 foxr 4203: return "nouser";
4204: }
1.1 albertel 4205: }
4206:
1.84 albertel 4207: sub addline {
4208: my ($fname,$hostid,$ip,$newline)=@_;
4209: my $contents;
4210: my $found=0;
4211: my $expr='^'.$hostid.':'.$ip.':';
4212: $expr =~ s/\./\\\./g;
1.134 albertel 4213: my $sh;
1.84 albertel 4214: if ($sh=IO::File->new("$fname.subscription")) {
4215: while (my $subline=<$sh>) {
4216: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
4217: }
4218: $sh->close();
4219: }
4220: $sh=IO::File->new(">$fname.subscription");
4221: if ($contents) { print $sh $contents; }
4222: if ($newline) { print $sh $newline; }
4223: $sh->close();
4224: return $found;
1.86 www 4225: }
4226:
4227: sub getchat {
1.122 www 4228: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 4229: my %hash;
4230: my $proname=&propath($cdom,$cname);
4231: my @entries=();
1.88 albertel 4232: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4233: &GDBM_READER(),0640)) {
4234: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4235: untie %hash;
1.123 www 4236: }
1.124 www 4237: my @participants=();
1.134 albertel 4238: my $cutoff=time-60;
1.123 www 4239: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 4240: &GDBM_WRCREAT(),0640)) {
4241: $hash{$uname.':'.$udom}=time;
1.123 www 4242: foreach (sort keys %hash) {
4243: if ($hash{$_}>$cutoff) {
1.124 www 4244: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 4245: }
4246: }
4247: untie %hash;
1.86 www 4248: }
1.124 www 4249: return (@participants,@entries);
1.86 www 4250: }
4251:
4252: sub chatadd {
1.88 albertel 4253: my ($cdom,$cname,$newchat)=@_;
4254: my %hash;
4255: my $proname=&propath($cdom,$cname);
4256: my @entries=();
1.142 www 4257: my $time=time;
1.88 albertel 4258: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4259: &GDBM_WRCREAT(),0640)) {
4260: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4261: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
4262: my ($thentime,$idnum)=split(/\_/,$lastid);
4263: my $newid=$time.'_000000';
4264: if ($thentime==$time) {
4265: $idnum=~s/^0+//;
4266: $idnum++;
4267: $idnum=substr('000000'.$idnum,-6,6);
4268: $newid=$time.'_'.$idnum;
4269: }
4270: $hash{$newid}=$newchat;
4271: my $expired=$time-3600;
4272: foreach (keys %hash) {
4273: my ($thistime)=($_=~/(\d+)\_/);
4274: if ($thistime<$expired) {
1.89 www 4275: delete $hash{$_};
1.88 albertel 4276: }
4277: }
4278: untie %hash;
1.142 www 4279: }
4280: {
4281: my $hfh;
4282: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
4283: print $hfh "$time:".&unescape($newchat)."\n";
4284: }
1.86 www 4285: }
1.84 albertel 4286: }
4287:
4288: sub unsub {
4289: my ($fname,$clientip)=@_;
4290: my $result;
1.161 foxr 4291: if (unlink("$fname.$clientname")) {
1.84 albertel 4292: $result="ok\n";
4293: } else {
4294: $result="not_subscribed\n";
4295: }
4296: if (-e "$fname.subscription") {
1.161 foxr 4297: my $found=&addline($fname,$clientname,$clientip,'');
1.84 albertel 4298: if ($found) { $result="ok\n"; }
4299: } else {
4300: if ($result != "ok\n") { $result="not_subscribed\n"; }
4301: }
4302: return $result;
4303: }
4304:
1.101 www 4305: sub currentversion {
4306: my $fname=shift;
4307: my $version=-1;
4308: my $ulsdir='';
4309: if ($fname=~/^(.+)\/[^\/]+$/) {
1.178.2.4 albertel 4310: $ulsdir=$1;
1.101 www 4311: }
1.114 albertel 4312: my ($fnamere1,$fnamere2);
4313: # remove version if already specified
1.101 www 4314: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 4315: # get the bits that go before and after the version number
4316: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4317: $fnamere1=$1;
4318: $fnamere2='.'.$2;
4319: }
1.101 www 4320: if (-e $fname) { $version=1; }
4321: if (-e $ulsdir) {
1.134 albertel 4322: if(-d $ulsdir) {
4323: if (opendir(LSDIR,$ulsdir)) {
4324: my $ulsfn;
4325: while ($ulsfn=readdir(LSDIR)) {
1.101 www 4326: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 4327: my $thisfile=$ulsdir.'/'.$ulsfn;
4328: unless (-l $thisfile) {
1.160 www 4329: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 4330: if ($1>$version) { $version=$1; }
4331: }
4332: }
4333: }
4334: closedir(LSDIR);
4335: $version++;
4336: }
4337: }
4338: }
4339: return $version;
1.101 www 4340: }
4341:
4342: sub thisversion {
4343: my $fname=shift;
4344: my $version=-1;
4345: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4346: $version=$1;
4347: }
4348: return $version;
4349: }
4350:
1.84 albertel 4351: sub subscribe {
4352: my ($userinput,$clientip)=@_;
4353: my $result;
4354: my ($cmd,$fname)=split(/:/,$userinput);
4355: my $ownership=&ishome($fname);
4356: if ($ownership eq 'owner') {
1.101 www 4357: # explitly asking for the current version?
4358: unless (-e $fname) {
4359: my $currentversion=¤tversion($fname);
4360: if (&thisversion($fname)==$currentversion) {
4361: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4362: my $root=$1;
4363: my $extension=$2;
4364: symlink($root.'.'.$extension,
4365: $root.'.'.$currentversion.'.'.$extension);
1.102 www 4366: unless ($extension=~/\.meta$/) {
1.178.2.4 albertel 4367: symlink($root.'.'.$extension.'.meta',
4368: $root.'.'.$currentversion.'.'.$extension.'.meta');
1.102 www 4369: }
1.101 www 4370: }
4371: }
4372: }
1.84 albertel 4373: if (-e $fname) {
4374: if (-d $fname) {
4375: $result="directory\n";
4376: } else {
1.161 foxr 4377: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 4378: my $now=time;
1.161 foxr 4379: my $found=&addline($fname,$clientname,$clientip,
4380: "$clientname:$clientip:$now\n");
1.84 albertel 4381: if ($found) { $result="$fname\n"; }
4382: # if they were subscribed to only meta data, delete that
4383: # subscription, when you subscribe to a file you also get
4384: # the metadata
4385: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4386: $fname=~s/\/home\/httpd\/html\/res/raw/;
4387: $fname="http://$thisserver/".$fname;
4388: $result="$fname\n";
4389: }
4390: } else {
4391: $result="not_found\n";
4392: }
4393: } else {
4394: $result="rejected\n";
4395: }
4396: return $result;
4397: }
1.91 albertel 4398:
4399: sub make_passwd_file {
1.98 foxr 4400: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 4401: my $result="ok\n";
4402: if ($umode eq 'krb4' or $umode eq 'krb5') {
4403: {
4404: my $pf = IO::File->new(">$passfilename");
4405: print $pf "$umode:$npass\n";
4406: }
4407: } elsif ($umode eq 'internal') {
4408: my $salt=time;
4409: $salt=substr($salt,6,2);
4410: my $ncpass=crypt($npass,$salt);
4411: {
4412: &Debug("Creating internal auth");
4413: my $pf = IO::File->new(">$passfilename");
4414: print $pf "internal:$ncpass\n";
4415: }
4416: } elsif ($umode eq 'localauth') {
4417: {
4418: my $pf = IO::File->new(">$passfilename");
4419: print $pf "localauth:$npass\n";
4420: }
4421: } elsif ($umode eq 'unix') {
4422: {
4423: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4424: {
4425: &Debug("Executing external: ".$execpath);
1.98 foxr 4426: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 4427: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 4428: print $se "$uname\n";
4429: print $se "$npass\n";
4430: print $se "$npass\n";
1.97 foxr 4431: }
4432: my $useraddok = $?;
4433: if($useraddok > 0) {
4434: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91 albertel 4435: }
4436: my $pf = IO::File->new(">$passfilename");
4437: print $pf "unix:\n";
4438: }
4439: } elsif ($umode eq 'none') {
4440: {
4441: my $pf = IO::File->new(">$passfilename");
4442: print $pf "none:\n";
4443: }
4444: } else {
4445: $result="auth_mode_error\n";
4446: }
4447: return $result;
1.121 albertel 4448: }
4449:
4450: sub sethost {
4451: my ($remotereq) = @_;
4452: my (undef,$hostid)=split(/:/,$remotereq);
4453: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4454: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
4455: $currenthostid=$hostid;
4456: $currentdomainid=$hostdom{$hostid};
4457: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4458: } else {
4459: &logthis("Requested host id $hostid not an alias of ".
4460: $perlvar{'lonHostID'}." refusing connection");
4461: return 'unable_to_set';
4462: }
4463: return 'ok';
4464: }
4465:
4466: sub version {
4467: my ($userinput)=@_;
4468: $remoteVERSION=(split(/:/,$userinput))[1];
4469: return "version:$VERSION";
1.127 albertel 4470: }
1.178.2.1 foxr 4471: ############## >>>>>>>>>>>>>>>>>>>>>>>>>> FUTUREWORK <<<<<<<<<<<<<<<<<<<<<<<<<<<<
1.128 albertel 4472: #There is a copy of this in lonnet.pm
1.178.2.1 foxr 4473: # Can we hoist these lil' things out into common places?
4474: #
1.127 albertel 4475: sub userload {
4476: my $numusers=0;
4477: {
4478: opendir(LONIDS,$perlvar{'lonIDsDir'});
4479: my $filename;
4480: my $curtime=time;
4481: while ($filename=readdir(LONIDS)) {
4482: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 4483: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 4484: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 4485: }
4486: closedir(LONIDS);
4487: }
4488: my $userloadpercent=0;
4489: my $maxuserload=$perlvar{'lonUserLoadLim'};
4490: if ($maxuserload) {
1.129 albertel 4491: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 4492: }
1.130 albertel 4493: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 4494: return $userloadpercent;
1.91 albertel 4495: }
4496:
1.61 harris41 4497: # ----------------------------------- POD (plain old documentation, CPAN style)
4498:
4499: =head1 NAME
4500:
4501: lond - "LON Daemon" Server (port "LOND" 5663)
4502:
4503: =head1 SYNOPSIS
4504:
1.74 harris41 4505: Usage: B<lond>
4506:
4507: Should only be run as user=www. This is a command-line script which
4508: is invoked by B<loncron>. There is no expectation that a typical user
4509: will manually start B<lond> from the command-line. (In other words,
4510: DO NOT START B<lond> YOURSELF.)
1.61 harris41 4511:
4512: =head1 DESCRIPTION
4513:
1.74 harris41 4514: There are two characteristics associated with the running of B<lond>,
4515: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4516: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4517: subscriptions, etc). These are described in two large
4518: sections below.
4519:
4520: B<PROCESS MANAGEMENT>
4521:
1.61 harris41 4522: Preforker - server who forks first. Runs as a daemon. HUPs.
4523: Uses IDEA encryption
4524:
1.74 harris41 4525: B<lond> forks off children processes that correspond to the other servers
4526: in the network. Management of these processes can be done at the
4527: parent process level or the child process level.
4528:
4529: B<logs/lond.log> is the location of log messages.
4530:
4531: The process management is now explained in terms of linux shell commands,
4532: subroutines internal to this code, and signal assignments:
4533:
4534: =over 4
4535:
4536: =item *
4537:
4538: PID is stored in B<logs/lond.pid>
4539:
4540: This is the process id number of the parent B<lond> process.
4541:
4542: =item *
4543:
4544: SIGTERM and SIGINT
4545:
4546: Parent signal assignment:
4547: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4548:
4549: Child signal assignment:
4550: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4551: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4552: to restart a new child.)
4553:
4554: Command-line invocations:
4555: B<kill> B<-s> SIGTERM I<PID>
4556: B<kill> B<-s> SIGINT I<PID>
4557:
4558: Subroutine B<HUNTSMAN>:
4559: This is only invoked for the B<lond> parent I<PID>.
4560: This kills all the children, and then the parent.
4561: The B<lonc.pid> file is cleared.
4562:
4563: =item *
4564:
4565: SIGHUP
4566:
4567: Current bug:
4568: This signal can only be processed the first time
4569: on the parent process. Subsequent SIGHUP signals
4570: have no effect.
4571:
4572: Parent signal assignment:
4573: $SIG{HUP} = \&HUPSMAN;
4574:
4575: Child signal assignment:
4576: none (nothing happens)
4577:
4578: Command-line invocations:
4579: B<kill> B<-s> SIGHUP I<PID>
4580:
4581: Subroutine B<HUPSMAN>:
4582: This is only invoked for the B<lond> parent I<PID>,
4583: This kills all the children, and then the parent.
4584: The B<lond.pid> file is cleared.
4585:
4586: =item *
4587:
4588: SIGUSR1
4589:
4590: Parent signal assignment:
4591: $SIG{USR1} = \&USRMAN;
4592:
4593: Child signal assignment:
4594: $SIG{USR1}= \&logstatus;
4595:
4596: Command-line invocations:
4597: B<kill> B<-s> SIGUSR1 I<PID>
4598:
4599: Subroutine B<USRMAN>:
4600: When invoked for the B<lond> parent I<PID>,
4601: SIGUSR1 is sent to all the children, and the status of
4602: each connection is logged.
1.144 foxr 4603:
4604: =item *
4605:
4606: SIGUSR2
4607:
4608: Parent Signal assignment:
4609: $SIG{USR2} = \&UpdateHosts
4610:
4611: Child signal assignment:
4612: NONE
4613:
1.74 harris41 4614:
4615: =item *
4616:
4617: SIGCHLD
4618:
4619: Parent signal assignment:
4620: $SIG{CHLD} = \&REAPER;
4621:
4622: Child signal assignment:
4623: none
4624:
4625: Command-line invocations:
4626: B<kill> B<-s> SIGCHLD I<PID>
4627:
4628: Subroutine B<REAPER>:
4629: This is only invoked for the B<lond> parent I<PID>.
4630: Information pertaining to the child is removed.
4631: The socket port is cleaned up.
4632:
4633: =back
4634:
4635: B<SERVER-SIDE ACTIVITIES>
4636:
4637: Server-side information can be accepted in an encrypted or non-encrypted
4638: method.
4639:
4640: =over 4
4641:
4642: =item ping
4643:
4644: Query a client in the hosts.tab table; "Are you there?"
4645:
4646: =item pong
4647:
4648: Respond to a ping query.
4649:
4650: =item ekey
4651:
4652: Read in encrypted key, make cipher. Respond with a buildkey.
4653:
4654: =item load
4655:
4656: Respond with CPU load based on a computation upon /proc/loadavg.
4657:
4658: =item currentauth
4659:
4660: Reply with current authentication information (only over an
4661: encrypted channel).
4662:
4663: =item auth
4664:
4665: Only over an encrypted channel, reply as to whether a user's
4666: authentication information can be validated.
4667:
4668: =item passwd
4669:
4670: Allow for a password to be set.
4671:
4672: =item makeuser
4673:
4674: Make a user.
4675:
4676: =item passwd
4677:
4678: Allow for authentication mechanism and password to be changed.
4679:
4680: =item home
1.61 harris41 4681:
1.74 harris41 4682: Respond to a question "are you the home for a given user?"
4683:
4684: =item update
4685:
4686: Update contents of a subscribed resource.
4687:
4688: =item unsubscribe
4689:
4690: The server is unsubscribing from a resource.
4691:
4692: =item subscribe
4693:
4694: The server is subscribing to a resource.
4695:
4696: =item log
4697:
4698: Place in B<logs/lond.log>
4699:
4700: =item put
4701:
4702: stores hash in namespace
4703:
4704: =item rolesput
4705:
4706: put a role into a user's environment
4707:
4708: =item get
4709:
4710: returns hash with keys from array
4711: reference filled in from namespace
4712:
4713: =item eget
4714:
4715: returns hash with keys from array
4716: reference filled in from namesp (encrypts the return communication)
4717:
4718: =item rolesget
4719:
4720: get a role from a user's environment
4721:
4722: =item del
4723:
4724: deletes keys out of array from namespace
4725:
4726: =item keys
4727:
4728: returns namespace keys
4729:
4730: =item dump
4731:
4732: dumps the complete (or key matching regexp) namespace into a hash
4733:
4734: =item store
4735:
4736: stores hash permanently
4737: for this url; hashref needs to be given and should be a \%hashname; the
4738: remaining args aren't required and if they aren't passed or are '' they will
4739: be derived from the ENV
4740:
4741: =item restore
4742:
4743: returns a hash for a given url
4744:
4745: =item querysend
4746:
4747: Tells client about the lonsql process that has been launched in response
4748: to a sent query.
4749:
4750: =item queryreply
4751:
4752: Accept information from lonsql and make appropriate storage in temporary
4753: file space.
4754:
4755: =item idput
4756:
4757: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4758: for each student, defined perhaps by the institutional Registrar.)
4759:
4760: =item idget
4761:
4762: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4763: for each student, defined perhaps by the institutional Registrar.)
4764:
4765: =item tmpput
4766:
4767: Accept and store information in temporary space.
4768:
4769: =item tmpget
4770:
4771: Send along temporarily stored information.
4772:
4773: =item ls
4774:
4775: List part of a user's directory.
4776:
1.135 foxr 4777: =item pushtable
4778:
4779: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4780: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4781: must be restored manually in case of a problem with the new table file.
4782: pushtable requires that the request be encrypted and validated via
4783: ValidateManager. The form of the command is:
4784: enc:pushtable tablename <tablecontents> \n
4785: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4786: cleartext newline.
4787:
1.74 harris41 4788: =item Hanging up (exit or init)
4789:
4790: What to do when a client tells the server that they (the client)
4791: are leaving the network.
4792:
4793: =item unknown command
4794:
4795: If B<lond> is sent an unknown command (not in the list above),
4796: it replys to the client "unknown_cmd".
1.135 foxr 4797:
1.74 harris41 4798:
4799: =item UNKNOWN CLIENT
4800:
4801: If the anti-spoofing algorithm cannot verify the client,
4802: the client is rejected (with a "refused" message sent
4803: to the client, and the connection is closed.
4804:
4805: =back
1.61 harris41 4806:
4807: =head1 PREREQUISITES
4808:
4809: IO::Socket
4810: IO::File
4811: Apache::File
4812: Symbol
4813: POSIX
4814: Crypt::IDEA
4815: LWP::UserAgent()
4816: GDBM_File
4817: Authen::Krb4
1.91 albertel 4818: Authen::Krb5
1.61 harris41 4819:
4820: =head1 COREQUISITES
4821:
4822: =head1 OSNAMES
4823:
4824: linux
4825:
4826: =head1 SCRIPT CATEGORIES
4827:
4828: Server/Process
4829:
4830: =cut
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