Annotation of loncom/lond, revision 1.178.2.5
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.178.2.5! albertel 5: # $Id: lond,v 1.178.2.4 2004/02/24 16:51:40 albertel 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:
1.178.2.5! albertel 56: my $VERSION='$Revision: 1.178.2.4 $'; #' 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: }
164:
165:
166: #
167: # Get a Request:
168: # Gets a Request message from the client. The transaction
169: # is defined as a 'line' of text. We remove the new line
170: # from the text line.
171: #
172: sub GetRequest {
173: my $input = <$client>;
174: chomp($input);
175:
176: Debug("Request = $input\n");
177:
178: &status('Processing '.$clientname.':'.$input);
179:
180: return $input;
181: }
182: #
183: # Decipher encoded traffic
184: # Parameters:
185: # input - Encoded data.
186: # Returns:
187: # Decoded data or undef if encryption key was not yet negotiated.
188: # Implicit input:
189: # cipher - This global holds the negotiated encryption key.
190: #
191: sub Decipher {
1.178.2.4 albertel 192: my $input = shift;
193: my $output = '';
1.178.2.1 foxr 194:
195:
1.178.2.4 albertel 196: if($cipher) {
197: my($enc, $enclength, $encinput) = split(/:/, $input);
198: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
199: $output .=
200: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
201: }
202: return substr($output, 0, $enclength);
203: } else {
204: return undef;
205: }
1.178.2.1 foxr 206: }
207:
208: #
209: # Register a command processor. This function is invoked to register a sub
210: # to process a request. Once registered, the ProcessRequest sub can automatically
211: # dispatch requests to an appropriate sub, and do the top level validity checking
212: # as well:
213: # - Is the keyword recognized.
214: # - Is the proper client type attempting the request.
215: # - Is the request encrypted if it has to be.
216: # Parameters:
217: # $RequestName - Name of the request being registered.
218: # This is the command request that will match
219: # against the hash keywords to lookup the information
220: # associated with the dispatch information.
221: # $Procedure - Reference to a sub to call to process the request.
222: # All subs get called as follows:
223: # Procedure($cmd, $tail, $replyfd, $key)
224: # $cmd - the actual keyword that invoked us.
225: # $tail - the tail of the request that invoked us.
226: # $replyfd- File descriptor connected to the client
227: # $MustEncode - True if the request must be encoded to be good.
228: # $ClientOk - True if it's ok for a client to request this.
229: # $ManagerOk - True if it's ok for a manager to request this.
230: # Side effects:
231: # - On success, the Dispatcher hash has an entry added for the key $RequestName
232: # - On failure, the program will die as it's a bad internal bug to try to
233: # register a duplicate command handler.
234: #
235: sub RegisterHandler {
1.178.2.4 albertel 236: my $RequestName = shift;
237: my $Procedure = shift;
238: my $MustEncode = shift;
239: my $ClientOk = shift;
240: my $ManagerOk = shift;
241:
242: # Don't allow duplication#
1.178.2.1 foxr 243:
1.178.2.4 albertel 244: if (defined $Dispatcher{$RequestName}) {
245: die "Attempting to define a duplicate request handler for $RequestName\n";
246: }
247: # Build the client type mask:
248:
249: my $ClientTypeMask = 0;
250: if($ClientOk) {
251: $ClientTypeMask |= $CLIENT_OK;
252: }
253: if($ManagerOk) {
254: $ClientTypeMask |= $MANAGER_OK;
255: }
256:
257: # Enter the hash:
1.178.2.1 foxr 258:
1.178.2.4 albertel 259: my @entry = ($Procedure, $MustEncode, $ClientTypeMask);
1.178.2.1 foxr 260:
1.178.2.4 albertel 261: $Dispatcher{$RequestName} = \@entry;
1.178.2.1 foxr 262:
263:
264: }
265:
266: #--------------------- Request Handlers --------------------------------------------
267: #
268: # By convention each request handler registers itself prior to the sub declaration:
269: #
270:
271: # Handles ping requests.
272: # Parameters:
273: # $cmd - the actual keyword that invoked us.
274: # $tail - the tail of the request that invoked us.
275: # $replyfd- File descriptor connected to the client
276: # Implicit Inputs:
277: # $currenthostid - Global variable that carries the name of the host we are
278: # known as.
279: # Returns:
280: # 1 - Ok to continue processing.
281: # 0 - Program should exit.
282: # Side effects:
283: # Reply information is sent to the client.
284:
285: sub PingHandler {
1.178.2.4 albertel 286: my $cmd = shift;
287: my $tail = shift;
288: my $client = shift;
1.178.2.1 foxr 289:
1.178.2.4 albertel 290: Reply( $client,"$currenthostid\n","$cmd:$tail");
1.178.2.1 foxr 291:
1.178.2.4 albertel 292: return 1;
1.178.2.1 foxr 293: }
294: RegisterHandler("ping", \&PingHandler, 0, 1, 1); # Ping unencoded, client or manager.
295: #
296: # Handles pong reequests:
297: # Parameters:
298: # $cmd - the actual keyword that invoked us.
299: # $tail - the tail of the request that invoked us.
300: # $replyfd- File descriptor connected to the client
301: # Implicit Inputs:
302: # $currenthostid - Global variable that carries the name of the host we are
303: # connected to.
304: # Returns:
305: # 1 - Ok to continue processing.
306: # 0 - Program should exit.
307: # Side effects:
308: # Reply information is sent to the client.
309:
310: sub PongHandler {
1.178.2.4 albertel 311: my $cmd = shift;
312: my $tail = shift;
313: my $replyfd = shift;
314:
315: my $reply=&reply("ping",$clientname);
316: Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
317: return 1;
1.178.2.1 foxr 318: }
319: RegisterHandler("pong", \&PongHandler, 0, 1, 1); # Pong unencoded, client or manager
320:
321: #
322: # EstablishKeyHandler:
323: # Called to establish an encrypted session key with the remote client.
324: #
325: # Parameters:
326: # $cmd - the actual keyword that invoked us.
327: # $tail - the tail of the request that invoked us.
328: # $replyfd- File descriptor connected to the client
329: # Implicit Inputs:
330: # $currenthostid - Global variable that carries the name of the host
331: # known as.
332: # $clientname - Global variable that carries the name of the hsot we're connected to.
333: # Returns:
334: # 1 - Ok to continue processing.
335: # 0 - Program should exit.
336: # Implicit Outputs:
337: # Reply information is sent to the client.
338: # $cipher is set with a reference to a new IDEA encryption object.
339: #
340: sub EstablishKeyHandler {
1.178.2.4 albertel 341: my $cmd = shift;
342: my $tail = shift;
343: my $replyfd = shift;
344:
345: my $buildkey=time.$$.int(rand 100000);
346: $buildkey=~tr/1-6/A-F/;
347: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
348: my $key=$currenthostid.$clientname;
349: $key=~tr/a-z/A-Z/;
350: $key=~tr/G-P/0-9/;
351: $key=~tr/Q-Z/0-9/;
352: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
353: $key=substr($key,0,32);
354: my $cipherkey=pack("H32",$key);
355: $cipher=new IDEA $cipherkey;
356: Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1.178.2.1 foxr 357:
1.178.2.4 albertel 358: return 1;
1.178.2.1 foxr 359:
360: }
361: RegisterHandler("ekey", \&EstablishKeyHandler, 0, 1,1);
362:
363: # LoadHandler:
364: # Handler for the load command. Returns the current system load average
365: # to the requestor.
366: #
367: # Parameters:
368: # $cmd - the actual keyword that invoked us.
369: # $tail - the tail of the request that invoked us.
370: # $replyfd- File descriptor connected to the client
371: # Implicit Inputs:
372: # $currenthostid - Global variable that carries the name of the host
373: # known as.
374: # $clientname - Global variable that carries the name of the hsot we're connected to.
375: # Returns:
376: # 1 - Ok to continue processing.
377: # 0 - Program should exit.
378: # Side effects:
379: # Reply information is sent to the client.
380: sub LoadHandler {
1.178.2.4 albertel 381: my $cmd = shift;
382: my $tail = shift;
383: my $replyfd = shift;
1.178.2.1 foxr 384:
385: # Get the load average from /proc/loadavg and calculate it as a percentage of
386: # the allowed load limit as set by the perl global variable lonLoadLim
387:
1.178.2.4 albertel 388: my $loadavg;
389: my $loadfile=IO::File->new('/proc/loadavg');
1.178.2.1 foxr 390:
1.178.2.4 albertel 391: $loadavg=<$loadfile>;
392: $loadavg =~ s/\s.*//g; # Extract the first field only.
1.178.2.1 foxr 393:
1.178.2.4 albertel 394: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1.178.2.1 foxr 395:
1.178.2.4 albertel 396: Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1.178.2.1 foxr 397:
1.178.2.4 albertel 398: return 1;
1.178.2.1 foxr 399: }
400: RegisterHandler("load", \&LoadHandler, 0, 1, 0);
401:
402:
403: #
404: # Process the userload request. This sub returns to the client the current
405: # user load average. It can be invoked either by clients or managers.
406: #
407: # Parameters:
408: # $cmd - the actual keyword that invoked us.
409: # $tail - the tail of the request that invoked us.
410: # $replyfd- File descriptor connected to the client
411: # Implicit Inputs:
412: # $currenthostid - Global variable that carries the name of the host
413: # known as.
414: # $clientname - Global variable that carries the name of the hsot we're connected to.
415: # Returns:
416: # 1 - Ok to continue processing.
417: # 0 - Program should exit
418: # Implicit inputs:
419: # whatever the userload() function requires.
420: # Implicit outputs:
421: # the reply is written to the client.
422: #
423: sub UserLoadHandler {
1.178.2.4 albertel 424: my $cmd = shift;
425: my $tail = shift;
426: my $replyfd = shift;
1.178.2.1 foxr 427:
1.178.2.4 albertel 428: my $userloadpercent=&userload();
429: Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
430:
431: return 1;
1.178.2.1 foxr 432: }
433: RegisterHandler("userload", \&UserLoadHandler, 0, 1, 0);
434:
435: # Process a request for the authorization type of a user:
436: # (userauth).
437: #
438: # Parameters:
439: # $cmd - the actual keyword that invoked us.
440: # $tail - the tail of the request that invoked us.
441: # $replyfd- File descriptor connected to the client
442: # Returns:
443: # 1 - Ok to continue processing.
444: # 0 - Program should exit
445: # Implicit outputs:
446: # The user authorization type is written to the client.
447: #
448: sub UserAuthorizationType {
1.178.2.4 albertel 449: my $cmd = shift;
450: my $tail = shift;
451: my $replyfd = shift;
452:
453: my $userinput = "$cmd:$tail";
454:
455: # Pull the domain and username out of the command tail.
456: # and call GetAuthType to determine the authentication type.
457:
458: my ($udom,$uname)=split(/:/,$tail);
459: my $result = GetAuthType($udom, $uname);
460: if($result eq "nouser") {
461: Failure( $replyfd, "unknown_user\n", $userinput);
462: } else {
463: Reply( $replyfd, "$result\n", $userinput);
464: }
1.178.2.1 foxr 465:
1.178.2.4 albertel 466: return 1;
1.178.2.1 foxr 467: }
468: RegisterHandler("currentauth", \&UserAuthorizationType, 1, 1, 0);
469: #
470: # Process a request by a manager to push a hosts or domain table
471: # to us. We pick apart the command and pass it on to the subs
472: # that already exist to do this.
473: #
474: # Parameters:
475: # $cmd - the actual keyword that invoked us.
476: # $tail - the tail of the request that invoked us.
477: # $client - File descriptor connected to the client
478: # Returns:
479: # 1 - Ok to continue processing.
480: # 0 - Program should exit
481: # Implicit Output:
482: # a reply is written to the client.
483:
484: sub PushFileHandler {
1.178.2.4 albertel 485: my $cmd = shift;
486: my $tail = shift;
487: my $client = shift;
1.178.2.1 foxr 488:
1.178.2.4 albertel 489: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 490:
1.178.2.4 albertel 491: # At this time we only know that the IP of our partner is a valid manager
492: # the code below is a hook to do further authentication (e.g. to resolve
493: # spoofing).
1.178.2.1 foxr 494:
1.178.2.4 albertel 495: my $cert = GetCertificate($userinput);
496: if(ValidManager($cert)) {
1.178.2.1 foxr 497:
1.178.2.4 albertel 498: # Now presumably we have the bona fides of both the peer host and the
499: # process making the request.
1.178.2.1 foxr 500:
1.178.2.4 albertel 501: my $reply = PushFile($userinput);
502: Reply($client, "$reply\n", $userinput);
1.178.2.1 foxr 503:
1.178.2.4 albertel 504: } else {
505: Failure( $client, "refused\n", $userinput);
506: }
1.178.2.1 foxr 507: }
508: RegisterHandler("pushfile", \&PushFileHandler, 1, 0, 1);
509:
510:
511:
512: # Process a reinit request. Reinit requests that either
513: # lonc or lond be reinitialized so that an updated
514: # host.tab or domain.tab can be processed.
515: #
516: # Parameters:
517: # $cmd - the actual keyword that invoked us.
518: # $tail - the tail of the request that invoked us.
519: # $client - File descriptor connected to the client
520: # Returns:
521: # 1 - Ok to continue processing.
522: # 0 - Program should exit
523: # Implicit output:
524: # a reply is sent to the client.
525: #
526: sub ReinitProcessHandler {
1.178.2.4 albertel 527: my $cmd = shift;
528: my $tail = shift;
529: my $client = shift;
530:
531: my $userinput = "$cmd:$tail";
532:
533: my $cert = GetCertificate($userinput);
534: if(ValidManager($cert)) {
535: chomp($userinput);
536: my $reply = ReinitProcess($userinput);
537: Reply( $client, "$reply\n", $userinput);
538: } else {
539: Failure( $client, "refused\n", $userinput);
540: }
541: return 1;
1.178.2.1 foxr 542: }
543:
544: RegisterHandler("reinit", \&ReinitProcessHandler, 1, 0, 1);
545:
546: # Process the editing script for a table edit operation.
547: # the editing operation must be encrypted and requested by
548: # a manager host.
549: #
550: # Parameters:
551: # $cmd - the actual keyword that invoked us.
552: # $tail - the tail of the request that invoked us.
553: # $client - File descriptor connected to the client
554: # Returns:
555: # 1 - Ok to continue processing.
556: # 0 - Program should exit
557: # Implicit output:
558: # a reply is sent to the client.
559: #
560: sub EditTableHandler {
1.178.2.4 albertel 561: my $command = shift;
562: my $tail = shift;
563: my $client = shift;
564:
565: my $userinput = "$command:$tail";
566:
567: my $cert = GetCertificate($userinput);
568: if(ValidManager($cert)) {
569: my($filetype, $script) = split(/:/, $tail);
570: if (($filetype eq "hosts") ||
571: ($filetype eq "domain")) {
572: if($script ne "") {
573: Reply($client, # BUGBUG - EditFile
574: EditFile($userinput), # could fail.
575: $userinput);
576: } else {
577: Failure($client,"refused\n",$userinput);
578: }
579: } else {
580: Failure($client,"refused\n",$userinput);
581: }
582: } else {
583: Failure($client,"refused\n",$userinput);
584: }
585: return 1;
1.178.2.1 foxr 586: }
587: RegisterHandler("edit", \&EditTableHandler, 1, 0, 1);
588:
589:
590: #
591: # Authenticate a user against the LonCAPA authentication
592: # database. Note that there are several authentication
593: # possibilities:
594: # - unix - The user can be authenticated against the unix
595: # password file.
596: # - internal - The user can be authenticated against a purely
597: # internal per user password file.
598: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
599: # ticket granting authority.
1.178.2.4 albertel 600: # - user - The person tailoring LonCAPA can supply a user authentication
601: # mechanism that is per system.
1.178.2.1 foxr 602: #
603: # Parameters:
604: # $cmd - The command that got us here.
605: # $tail - Tail of the command (remaining parameters).
606: # $client - File descriptor connected to client.
607: # Returns
608: # 0 - Requested to exit, caller should shut down.
609: # 1 - Continue processing.
610: # Implicit inputs:
611: # The authentication systems describe above have their own forms of implicit
612: # input into the authentication process that are described above.
613: #
614: sub AuthenticateHandler {
1.178.2.4 albertel 615: my $cmd = shift;
616: my $tail = shift;
617: my $client = shift;
618:
619: # Regenerate the full input line
620:
621: my $userinput = $cmd.":".$tail;
622:
623: # udom - User's domain.
624: # uname - Username.
625: # upass - User's password.
626:
627: my ($udom,$uname,$upass)=split(/:/,$tail);
628: Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
629: chomp($upass);
630: $upass=unescape($upass);
631: my $proname=propath($udom,$uname);
632: my $passfilename="$proname/passwd";
633:
634: # The user's 'personal' loncapa passworrd file describes how to authenticate:
635:
636: if (-e $passfilename) {
637: Debug("Located password file: $passfilename");
638:
639: my $pf = IO::File->new($passfilename);
640: my $realpasswd=<$pf>;
641: chomp($realpasswd);
642: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
643: my $pwdcorrect=0;
644: #
645: # Authenticate against password stored in the internal file.
646: #
647: Debug("Authenticating via $howpwd");
648: if ($howpwd eq 'internal') {
649: &Debug("Internal auth");
650: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
651: #
652: # Authenticate against the unix password file.
653: #
654: } elsif ($howpwd eq 'unix') {
655: &Debug("Unix auth");
656: if((getpwnam($uname))[1] eq "") { #no such user!
657: $pwdcorrect = 0;
658: } else {
659: $contentpwd=(getpwnam($uname))[1];
660: my $pwauth_path="/usr/local/sbin/pwauth";
661: unless ($contentpwd eq 'x') {
662: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
663: } elsif (-e $pwauth_path) {
664: open PWAUTH, "|$pwauth_path" or
665: die "Cannot invoke authentication";
666: print PWAUTH "$uname\n$upass\n";
667: close PWAUTH;
668: $pwdcorrect=!$?;
669: }
670: }
671: #
672: # Authenticate against a Kerberos 4 server:
673: #
674: } elsif ($howpwd eq 'krb4') {
675: my $null=pack("C",0);
676: unless ($upass=~/$null/) {
677: my $krb4_error = &Authen::Krb4::get_pw_in_tkt($uname,
678: "",
679: $contentpwd,
680: 'krbtgt',
681: $contentpwd,
682: 1,
683: $upass);
684: if (!$krb4_error) {
685: $pwdcorrect = 1;
686: } else {
687: $pwdcorrect=0;
688: # log error if it is not a bad password
689: if ($krb4_error != 62) {
690: &logthis('krb4:'.$uname.','.$contentpwd.','.
691: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
692: }
693: }
694: }
695: #
696: # Authenticate against a Kerberos 5 server:
697: #
698: } elsif ($howpwd eq 'krb5') {
699: my $null=pack("C",0);
700: unless ($upass=~/$null/) {
701: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
702: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
703: my $krbserver=&Authen::Krb5::parse_name($krbservice);
704: my $credentials=&Authen::Krb5::cc_default();
705: $credentials->initialize($krbclient);
706: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
707: $krbserver,
708: $upass,
709: $credentials);
710: $pwdcorrect = ($krbreturn == 1);
711: } else {
712: $pwdcorrect=0;
713: }
714: #
715: # Finally, the user may have written in an authentication module.
716: # in that case, if requested, authenticate against it.
717: #
718: } elsif ($howpwd eq 'localauth') {
719: $pwdcorrect=&localauth::localauth($uname,$upass,$contentpwd);
720: }
721: #
722: # Successfully authorized.
723: #
724: if ($pwdcorrect) {
725: Reply( $client, "authorized\n", $userinput);
726: #
727: # Bad credentials: Failed to authorize
728: #
729: } else {
730: Failure( $client, "non_authorized\n", $userinput);
731: }
732: #
733: # User bad... note it may be bad security practice to
734: # differntiate to the caller a bad user from a bad
735: # passwd... since that supplies covert channel information
736: # (you have a good user but bad password e.g.) to guessers.
737: #
738: } else {
739: Failure( $client, "unknown_user\n", $userinput);
740: }
741: return 1;
1.178.2.1 foxr 742: }
743: RegisterHandler("auth", \&AuthenticateHandler, 1, 1, 0);
744:
745: #
746: # Change a user's password. Note that this function is complicated by
747: # the fact that a user may be authenticated in more than one way:
748: # At present, we are not able to change the password for all types of
749: # authentication methods. Only for:
750: # unix - unix password or shadow passoword style authentication.
751: # local - Locally written authentication mechanism.
752: # For now, kerb4 and kerb5 password changes are not supported and result
753: # in an error.
754: # FUTURE WORK:
755: # Support kerberos passwd changes?
756: # Parameters:
757: # $cmd - The command that got us here.
758: # $tail - Tail of the command (remaining parameters).
759: # $client - File descriptor connected to client.
760: # Returns
761: # 0 - Requested to exit, caller should shut down.
762: # 1 - Continue processing.
763: # Implicit inputs:
764: # The authentication systems describe above have their own forms of implicit
765: # input into the authentication process that are described above.
766: sub ChangePasswordHandler {
1.178.2.4 albertel 767: my $cmd = shift;
768: my $tail = shift;
769: my $client = shift;
770:
771: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
772:
773: #
774: # udom - user's domain.
775: # uname - Username.
776: # upass - Current password.
777: # npass - New password.
778:
779: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
780: chomp($npass);
781: $upass=&unescape($upass);
782: $npass=&unescape($npass);
783: &Debug("Trying to change password for $uname");
784: my $proname=propath($udom,$uname);
785: my $passfilename="$proname/passwd";
786: if (-e $passfilename) {
787: my $realpasswd;
788: {
789: my $pf = IO::File->new($passfilename);
790: $realpasswd=<$pf>;
791: }
792: chomp($realpasswd);
793: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
794: if ($howpwd eq 'internal') {
795: &Debug("internal auth");
796: if (crypt($upass,$contentpwd) eq $contentpwd) {
797: my $salt=time;
798: $salt=substr($salt,6,2);
799: my $ncpass=crypt($npass,$salt);
800: {
801: my $pf = IO::File->new(">$passfilename");
802: if ($pf) {
803: print $pf "internal:$ncpass\n";
804: &logthis("Result of password change for "
805: ."$uname: pwchange_success");
806: Reply($client, "ok\n", $userinput);
807: } else {
808: &logthis("Unable to open $uname passwd "
809: ."to change password");
810: Failure( $client, "non_authorized\n",$userinput);
811: }
812: }
813: } else {
814: Failure($client, "non_authorized\n", $userinput);
815: }
816: } elsif ($howpwd eq 'unix') {
817: # Unix means we have to access /etc/password
818: # one way or another.
819: # First: Make sure the current password is
820: # correct
821: &Debug("auth is unix");
822: $contentpwd=(getpwnam($uname))[1];
823: my $pwdcorrect = "0";
824: my $pwauth_path="/usr/local/sbin/pwauth";
825: unless ($contentpwd eq 'x') {
826: $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);
827: } elsif (-e $pwauth_path) {
828: open PWAUTH, "|$pwauth_path" or
829: die "Cannot invoke authentication";
830: print PWAUTH "$uname\n$upass\n";
831: close PWAUTH;
832: &Debug("exited pwauth with $? ($uname,$upass) ");
833: $pwdcorrect=($? == 0);
834: }
835: if ($pwdcorrect) {
836: my $execdir=$perlvar{'lonDaemons'};
837: &Debug("Opening lcpasswd pipeline");
838: my $pf = IO::File->new("|$execdir/lcpasswd > "
839: ."$perlvar{'lonDaemons'}"
840: ."/logs/lcpasswd.log");
841: print $pf "$uname\n$npass\n$npass\n";
842: close $pf;
843: my $err = $?;
844: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
845: &logthis("Result of password change for $uname: ".
846: &lcpasswdstrerror($?));
847: Reply($client, "$result\n", $userinput);
848: } else {
849: Reply($client, "non_authorized\n", $userinput);
850: }
851: } else {
852: Reply( $client, "auth_mode_error\n", $userinput);
853: }
854: } else {
855: Reply( $client, "unknown_user\n", $userinput);
856: }
857: return 1;
1.178.2.1 foxr 858: }
859: RegisterHandler("passwd", \&ChangePasswordHandler, 1, 1, 0);
860:
861: #
862: # Create a new user. User in this case means a lon-capa user.
863: # The user must either already exist in some authentication realm
864: # like kerberos or the /etc/passwd. If not, a user completely local to
865: # this loncapa system is created.
866: #
867: # Parameters:
868: # $cmd - The command that got us here.
869: # $tail - Tail of the command (remaining parameters).
870: # $client - File descriptor connected to client.
871: # Returns
872: # 0 - Requested to exit, caller should shut down.
873: # 1 - Continue processing.
874: # Implicit inputs:
875: # The authentication systems describe above have their own forms of implicit
876: # input into the authentication process that are described above.
877: sub AddUserHandler {
1.178.2.4 albertel 878: my $cmd = shift;
879: my $tail = shift;
880: my $client = shift;
881:
882: my $userinput = $cmd.":".$tail;
883:
884: my $oldumask=umask(0077);
885: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
886: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
887: chomp($npass);
888: $npass=&unescape($npass);
889: my $proname=propath($udom,$uname);
890: my $passfilename="$proname/passwd";
891: &Debug("Password file created will be:".$passfilename);
892: if (-e $passfilename) {
893: Failure( $client, "already_exists\n", $userinput);
894: } elsif ($udom ne $currentdomainid) {
895: Failure($client, "not_right_domain\n", $userinput);
896: } else {
897: my @fpparts=split(/\//,$proname);
898: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
899: my $fperror='';
900: for (my $i=3;$i<=$#fpparts;$i++) {
901: $fpnow.='/'.$fpparts[$i];
902: unless (-e $fpnow) {
903: unless (mkdir($fpnow,0777)) {
904: $fperror="error: ".($!+0)." mkdir failed while attempting "
905: ."makeuser";
906: }
907: }
908: }
909: unless ($fperror) {
910: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
911: Reply($client, $result, $userinput); #BUGBUG - could be fail
912: } else {
913: Failure($client, "$fperror\n", $userinput);
914: }
915: }
916: umask($oldumask);
917: return 1;
1.178.2.1 foxr 918:
919: }
920: RegisterHandler("makeuser", \&AddUserHandler, 1, 1, 0);
921:
922: #
923: # Change the authentication method of a user. Note that this may
924: # also implicitly change the user's password if, for example, the user is
925: # joining an existing authentication realm. Known authentication realms at
926: # this time are:
927: # internal - Purely internal password file (only loncapa knows this user)
928: # local - Institutionally written authentication module.
929: # unix - Unix user (/etc/passwd with or without /etc/shadow).
930: # kerb4 - kerberos version 4
931: # kerb5 - kerberos version 5
932: #
933: # Parameters:
934: # $cmd - The command that got us here.
935: # $tail - Tail of the command (remaining parameters).
936: # $client - File descriptor connected to client.
937: # Returns
938: # 0 - Requested to exit, caller should shut down.
939: # 1 - Continue processing.
940: # Implicit inputs:
941: # The authentication systems describe above have their own forms of implicit
942: # input into the authentication process that are described above.
943: #
944: sub ChangeAuthenticationHandler {
1.178.2.4 albertel 945: my $cmd = shift;
946: my $tail = shift;
947: my $client = shift;
948:
949: my $userinput = "$cmd:$tail"; # Reconstruct user input.
950:
951: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
952: chomp($npass);
953: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
954: $npass=&unescape($npass);
955: my $proname=&propath($udom,$uname);
956: my $passfilename="$proname/passwd";
957: if ($udom ne $currentdomainid) {
958: Failure( $client, "not_right_domain\n", $client);
959: } else {
960: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
961: Reply($client, $result, $userinput);
962: }
963: return 1;
1.178.2.1 foxr 964: }
965: RegisterHandler("changeuserauth", \&ChangeAuthenticationHandler, 1,1, 0);
966:
967: #
968: # Determines if this is the home server for a user. The home server
969: # for a user will have his/her lon-capa passwd file. Therefore all we need
970: # to do is determine if this file exists.
971: #
972: # Parameters:
973: # $cmd - The command that got us here.
974: # $tail - Tail of the command (remaining parameters).
975: # $client - File descriptor connected to client.
976: # Returns
977: # 0 - Requested to exit, caller should shut down.
978: # 1 - Continue processing.
979: # Implicit inputs:
980: # The authentication systems describe above have their own forms of implicit
981: # input into the authentication process that are described above.
982: #
983: sub IsHomeHandler {
1.178.2.4 albertel 984: my $cmd = shift;
985: my $tail = shift;
986: my $client = shift;
987:
988: my $userinput = "$cmd:$tail";
989:
990: my ($udom,$uname)=split(/:/,$tail);
991: chomp($uname);
992: my $proname=propath($udom,$uname);
993: if (-e $proname) {
994: Reply( $client, "found\n", $userinput);
995: } else {
996: Failure($client, "not_found\n", $userinput);
997: }
998: return 1;
1.178.2.1 foxr 999: }
1000: RegisterHandler("home", \&IsHomeHandler, 0,1,0);
1001: #
1002: # Process an update request for a resource?? I think what's going on here is
1003: # that a resource has been modified that we hold a subscription to.
1004: # If the resource is not local, then we must update, or at least invalidate our
1005: # cached copy of the resource.
1006: # FUTURE WORK:
1007: # I need to look at this logic carefully. My druthers would be to follow
1008: # typical caching logic, and simple invalidate the cache, drop any subscription
1009: # an let the next fetch start the ball rolling again... however that may
1010: # actually be more difficult than it looks given the complex web of
1011: # proxy servers.
1012: # Parameters:
1013: # $cmd - The command that got us here.
1014: # $tail - Tail of the command (remaining parameters).
1015: # $client - File descriptor connected to client.
1016: # Returns
1017: # 0 - Requested to exit, caller should shut down.
1018: # 1 - Continue processing.
1019: # Implicit inputs:
1020: # The authentication systems describe above have their own forms of implicit
1021: # input into the authentication process that are described above.
1022: #
1023: sub UpdateResourceHandler {
1.178.2.4 albertel 1024: my $cmd = shift;
1025: my $tail = shift;
1026: my $client = shift;
1027:
1028: my $userinput = "$cmd:$tail";
1029:
1030: my $fname=$tail;
1031: my $ownership=ishome($fname);
1032: if ($ownership eq 'not_owner') {
1033: if (-e $fname) {
1034: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1035: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1036: my $now=time;
1037: my $since=$now-$atime;
1038: if ($since>$perlvar{'lonExpire'}) {
1039: my $reply=&reply("unsub:$fname","$clientname");
1040: unlink("$fname");
1041: } else {
1042: my $transname="$fname.in.transfer";
1043: my $remoteurl=&reply("sub:$fname","$clientname");
1044: my $response;
1045: alarm(120);
1046: {
1047: my $ua=new LWP::UserAgent;
1048: my $request=new HTTP::Request('GET',"$remoteurl");
1049: $response=$ua->request($request,$transname);
1050: }
1051: alarm(0);
1052: if ($response->is_error()) {
1053: unlink($transname);
1054: my $message=$response->status_line;
1055: &logthis("LWP GET: $message for $fname ($remoteurl)");
1056: } else {
1057: if ($remoteurl!~/\.meta$/) {
1058: alarm(120);
1059: {
1060: my $ua=new LWP::UserAgent;
1061: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1062: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1063: if ($mresponse->is_error()) {
1064: unlink($fname.'.meta');
1065: }
1066: }
1067: alarm(0);
1068: }
1069: rename($transname,$fname);
1070: }
1071: }
1072: Reply( $client, "ok\n", $userinput);
1073: } else {
1074: Failure($client, "not_found\n", $userinput);
1075: }
1076: } else {
1077: Failure($client, "rejected\n", $userinput);
1078: }
1079: return 1;
1.178.2.1 foxr 1080: }
1081: RegisterHandler("update", \&UpdateResourceHandler, 0 ,1, 0);
1082:
1083: #
1084: # Fetch a user file from a remote server:
1085: # Parameters:
1086: # $cmd - The command that got us here.
1087: # $tail - Tail of the command (remaining parameters).
1088: # $client - File descriptor connected to client.
1089: # Returns
1090: # 0 - Requested to exit, caller should shut down.
1091: # 1 - Continue processing.
1092: #
1093: sub FetchUserFileHandler {
1.178.2.4 albertel 1094: my $cmd = shift;
1095: my $tail = shift;
1096: my $client = shift;
1097:
1098: my $userinput = "$cmd:$tail";
1099: my $fname = $tail;
1100: my ($udom,$uname,$ufile)=split(/\//,$fname);
1101: my $udir=propath($udom,$uname).'/userfiles';
1102: unless (-e $udir) {
1103: mkdir($udir,0770);
1104: }
1105: if (-e $udir) {
1106: $ufile=~s/^[\.\~]+//;
1107: $ufile=~s/\///g;
1108: my $destname=$udir.'/'.$ufile;
1109: my $transname=$udir.'/'.$ufile.'.in.transit';
1110: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1111: my $response;
1112: alarm(120);
1113: {
1114: my $ua=new LWP::UserAgent;
1115: my $request=new HTTP::Request('GET',"$remoteurl");
1116: $response=$ua->request($request,$transname);
1117: }
1118: alarm(0);
1119: if ($response->is_error()) {
1120: unlink($transname);
1121: my $message=$response->status_line;
1122: &logthis("LWP GET: $message for $fname ($remoteurl)");
1123: Failure($client, "failed\n", $userinput);
1124: } else {
1125: if (!rename($transname,$destname)) {
1126: &logthis("Unable to move $transname to $destname");
1127: unlink($transname);
1128: Failure($client, "failed\n", $userinput);
1129: } else {
1130: Reply($client, "ok\n", $userinput);
1131: }
1132: }
1133: } else {
1134: Failure($client, "not_home\n", $userinput);
1135: }
1136: return 1;
1.178.2.1 foxr 1137: }
1138: RegisterHandler("fetchuserfile", \&FetchUserFileHandler, 0, 1, 0);
1139: #
1140: # Authenticate access to a user file. Question? The token for athentication
1141: # is allowed to be sent as cleartext is this really what we want? This token
1142: # represents the user's session id. Once it is forged does this allow too much access??
1143: #
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: sub AuthenticateUserFileAccess {
1.178.2.4 albertel 1152: my $cmd = shift;
1153: my $tail = shift;
1154: my $client = shift;
1155: my $userinput = "$cmd:$tail";
1156:
1157: my ($fname,$session)=split(/:/,$tail);
1158: chomp($session);
1159: my $reply='non_auth';
1160: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.$session.'.id')) {
1161: while (my $line=<ENVIN>) {
1162: if ($line=~/userfile\.$fname\=/) {
1163: $reply='ok';
1164: }
1165: }
1166: close(ENVIN);
1167: Reply($client, $reply."\n", $userinput);
1168: } else {
1169: Failure($client, "invalid_token\n", $userinput);
1170: }
1171: return 1;
1.178.2.1 foxr 1172:
1173: }
1174: RegisterHandler("tokenauthuserfile", \&AuthenticateUserFileAccess, 0, 1, 0);
1175: #
1176: # Unsubscribe from a resource.
1177: #
1178: # Parameters:
1179: # $cmd - The command that got us here.
1180: # $tail - Tail of the command (remaining parameters).
1181: # $client - File descriptor connected to client.
1182: # Returns
1183: # 0 - Requested to exit, caller should shut down.
1184: # 1 - Continue processing.
1185: #
1186: sub UnsubscribeHandler {
1.178.2.4 albertel 1187: my $cmd = shift;
1188: my $tail = shift;
1189: my $client = shift;
1190: my $userinput= "$cmd:$tail";
1191:
1192: my $fname = $tail;
1193: if (-e $fname) {
1194: Reply($client, &unsub($client,$fname,$clientip), $userinput);
1195: } else {
1196: Failure($client, "not_found\n", $userinput);
1197: }
1198: return 1;
1.178.2.1 foxr 1199: }
1200: RegisterHandler("unusb", \&UnsubscribeHandler, 0, 1, 0);
1201:
1202: # Subscribe to a resource.
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: #
1212: sub SubscribeHandler {
1.178.2.4 albertel 1213: my $cmd = shift;
1214: my $tail = shift;
1215: my $client = shift;
1216: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 1217:
1.178.2.4 albertel 1218: Reply( $client, &subscribe($userinput,$clientip), $userinput);
1219:
1220: return 1;
1.178.2.1 foxr 1221: }
1222: RegisterHandler("sub", \&SubscribeHandler, 0, 1, 0);
1223:
1224: #
1225: # Determine the version of a resource (?) Or is it return
1226: # the top version of the resource? Not yet clear from the
1227: # code in currentversion.
1228: #
1229: # Parameters:
1230: # $cmd - The command that got us here.
1231: # $tail - Tail of the command (remaining parameters).
1232: # $client - File descriptor connected to client.
1233: # Returns
1234: # 0 - Requested to exit, caller should shut down.
1235: # 1 - Continue processing.
1236: #
1237: sub CurrentVersionHandler {
1.178.2.4 albertel 1238: my $cmd = shift;
1239: my $tail = shift;
1240: my $client = shift;
1241: my $userinput= "$cmd:$tail";
1242:
1243: my $fname = $tail;
1244: Reply( $client, ¤tversion($fname)."\n", $userinput);
1245: return 1;
1.178.2.1 foxr 1246:
1247: }
1248: RegisterHandler("currentversion", \&CurrentVersionHandler, 0, 1, 0);
1249:
1250:
1251: # Make an entry in a user's activity log.
1252: #
1253: # Parameters:
1254: # $cmd - The command that got us here.
1255: # $tail - Tail of the command (remaining parameters).
1256: # $client - File descriptor connected to client.
1257: # Returns
1258: # 0 - Requested to exit, caller should shut down.
1259: # 1 - Continue processing.
1260: #
1261: sub ActivityLogEntryHandler {
1.178.2.4 albertel 1262: my $cmd = shift;
1263: my $tail = shift;
1264: my $client = shift;
1265: my $userinput= "$cmd:$tail";
1266:
1267: my ($udom,$uname,$what)=split(/:/,$tail);
1268: chomp($what);
1269: my $proname=propath($udom,$uname);
1270: my $now=time;
1271: my $hfh;
1272: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1273: print $hfh "$now:$clientname:$what\n";
1274: Reply( $client, "ok\n", $userinput);
1275: } else {
1276: Reply($client, "error: ".($!+0)." IO::File->new Failed "
1277: ."while attempting log\n",
1278: $userinput);
1279: }
1.178.2.1 foxr 1280:
1.178.2.4 albertel 1281: return 1;
1.178.2.1 foxr 1282: }
1283: RegisterHandler("log", \&ActivityLogEntryHandler, 0, 1, 0);
1284: #
1285: # Put a namespace entry in a user profile hash.
1286: # My druthers would be for this to be an encrypted interaction too.
1287: # anything that might be an inadvertent covert channel about either
1288: # user authentication or user personal information....
1289: #
1290: # Parameters:
1291: # $cmd - The command that got us here.
1292: # $tail - Tail of the command (remaining parameters).
1293: # $client - File descriptor connected to client.
1294: # Returns
1295: # 0 - Requested to exit, caller should shut down.
1296: # 1 - Continue processing.
1297: #
1298: sub PutUserProfileEntry {
1.178.2.4 albertel 1299: my $cmd = shift;
1300: my $tail = shift;
1301: my $client = shift;
1302: my $userinput = "$cmd:$tail";
1303:
1304: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
1305: $namespace=~s/\//\_/g;
1306: $namespace=~s/\W//g;
1307: if ($namespace ne 'roles') {
1308: chomp($what);
1309: my $proname=propath($udom,$uname);
1310: my $now=time;
1311: unless ($namespace=~/^nohist\_/) {
1312: my $hfh;
1313: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1314: print $hfh "P:$now:$what\n";
1315: }
1316: }
1317: my @pairs=split(/\&/,$what);
1318: my %hash;
1319: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
1320: &GDBM_WRCREAT(),0640)) {
1321: foreach my $pair (@pairs) {
1322: my ($key,$value)=split(/=/,$pair);
1323: $hash{$key}=$value;
1324: }
1325: if (untie(%hash)) {
1326: Reply( $client, "ok\n", $userinput);
1327: } else {
1328: Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
1329: "while attempting put\n",
1330: $userinput);
1331: }
1332: } else {
1333: Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
1334: "while attempting put\n", $userinput);
1335: }
1336: } else {
1337: Failure( $client, "refused\n", $userinput);
1338: }
1.178.2.1 foxr 1339:
1.178.2.4 albertel 1340: return 1;
1.178.2.1 foxr 1341: }
1342: RegisterHandler("put", \&PutUserProfileEntry, 0, 1, 0);
1343:
1344: #
1345: # Increment a profile entry in the user history file.
1346: # The history contains keyword value pairs. In this case,
1347: # The value itself is a pair of numbers. The first, the current value
1348: # the second an increment that this function applies to the current
1349: # value.
1350: #
1351: # Parameters:
1352: # $cmd - The command that got us here.
1353: # $tail - Tail of the command (remaining parameters).
1354: # $client - File descriptor connected to client.
1355: # Returns
1356: # 0 - Requested to exit, caller should shut down.
1357: # 1 - Continue processing.
1358: #
1359: sub IncrementUserValueHandler {
1.178.2.4 albertel 1360: my $cmd = shift;
1361: my $tail = shift;
1362: my $client = shift;
1363: my $userinput = shift;
1364:
1365: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
1366: $namespace=~s/\//\_/g;
1367: $namespace=~s/\W//g;
1368: if ($namespace ne 'roles') {
1369: chomp($what);
1370: my $proname=propath($udom,$uname);
1371: my $now=time;
1372: unless ($namespace=~/^nohist\_/) {
1373: my $hfh;
1374: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1375: print $hfh "P:$now:$what\n";
1376: }
1377: }
1378: my @pairs=split(/\&/,$what);
1379: my %hash;
1380: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),
1381: 0640)) {
1382: foreach my $pair (@pairs) {
1383: my ($key,$value)=split(/=/,$pair);
1384: # We could check that we have a number...
1385: if (! defined($value) || $value eq '') {
1386: $value = 1;
1387: }
1388: $hash{$key}+=$value;
1389: }
1390: if (untie(%hash)) {
1391: Reply( $client, "ok\n", $userinput);
1392: } else {
1393: Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
1394: "while attempting put\n", $userinput);
1395: }
1396: } else {
1397: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1398: "while attempting put\n", $userinput);
1399: }
1400: } else {
1401: Failure($client, "refused\n", $userinput);
1402: }
1.178.2.1 foxr 1403:
1.178.2.4 albertel 1404: return 1;
1.178.2.1 foxr 1405: }
1406: RegisterHandler("inc", \&IncrementUserValueHandler, 0, 1, 0);
1407: #
1408: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
1409: # Each 'role' a user has implies a set of permissions. Adding a new role
1410: # for a person grants the permissions packaged with that role
1411: # to that user when the role is selected.
1412: #
1413: # Parameters:
1414: # $cmd - The command string (rolesput).
1415: # $tail - The remainder of the request line. For rolesput this
1416: # consists of a colon separated list that contains:
1417: # The domain and user that is granting the role (logged).
1418: # The domain and user that is getting the role.
1419: # The roles being granted as a set of & separated pairs.
1420: # each pair a key value pair.
1421: # $client - File descriptor connected to the client.
1422: # Returns:
1423: # 0 - If the daemon should exit
1424: # 1 - To continue processing.
1425: #
1426: #
1427: sub RolesPutHandler {
1.178.2.4 albertel 1428: my $cmd = shift;
1429: my $tail = shift;
1430: my $client = shift;
1431: my $userinput = "$cmd:$tail";
1432:
1433: my ($exedom,$exeuser,$udom,$uname,$what) =split(/:/,$tail);
1434: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
1435: "what = ".$what);
1436: my $namespace='roles';
1437: chomp($what);
1438: my $proname=propath($udom,$uname);
1439: my $now=time;
1440: #
1441: # Log the attempt to set a role. The {}'s here ensure that the file
1442: # handle is open for the minimal amount of time. Since the flush
1443: # is done on close this improves the chances the log will be an un-
1444: # corrupted ordered thing.
1445: {
1446: my $hfh;
1447: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1448: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1449: }
1450: }
1451: my @pairs=split(/\&/,$what);
1452: my %hash;
1453: if (tie(%hash,'GDBM_File',"$proname/$namespace.db", &GDBM_WRCREAT(),0640)) {
1454: foreach my $pair (@pairs) {
1455: my ($key,$value)=split(/=/,$pair);
1.178.2.1 foxr 1456: &ManagePermissions($key, $udom, $uname,
1457: &GetAuthType( $udom, $uname));
1458: $hash{$key}=$value;
1.178.2.4 albertel 1459: }
1460: if (untie(%hash)) {
1461: Reply($client, "ok\n", $userinput);
1462: } else {
1463: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1464: "while attempting rolesput\n", $userinput);
1465: }
1466: } else {
1467: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1468: "while attempting rolesput\n", $userinput);
1469: }
1470: return 1;
1.178.2.1 foxr 1471: }
1472: RegisterHandler("rolesput", \&RolesPutHandler, 1,1,0); # Encoded client only.
1473: #
1474: # Deletes (removes) a role for a user. This is equivalent to removing
1475: # a permissions package associated with the role from the user's profile.
1476: #
1477: # Parameters:
1478: # $cmd - The command (rolesdel)
1479: # $tail - The remainder of the request line. This consists
1480: # of:
1481: # The domain and user requesting the change (logged)
1482: # The domain and user being changed.
1483: # The roles being revoked. These are shipped to us
1484: # as a bunch of & separated role name keywords.
1485: # $client - The file handle open on the client.
1486: # Returns:
1487: # 1 - Continue processing
1488: # 0 - Exit.
1489: #
1490: sub RolesDeleteHandler {
1.178.2.4 albertel 1491: my $cmd = shift;
1492: my $tail = shift;
1493: my $client = shift;
1494: my $userinput = "$cmd:$tail";
1495:
1496: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
1497: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
1498: "what = ".$what);
1499: my $namespace='roles';
1500: chomp($what);
1501: my $proname=propath($udom,$uname);
1502: my $now=time;
1503: #
1504: # Log the attempt. This {}'ing is done to ensure that the
1505: # logfile is flushed and closed as quickly as possible. Hopefully
1506: # this preserves both time ordering and reduces the probability that
1507: # messages will be interleaved.
1508: #
1509: {
1510: my $hfh;
1511: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1512: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1513: }
1514: }
1515: my @rolekeys=split(/\&/,$what);
1516: my %hash;
1517: if (tie(%hash,'GDBM_File',"$proname/$namespace.db", &GDBM_WRCREAT(),0640)) {
1518: foreach my $key (@rolekeys) {
1519: delete $hash{$key};
1520: }
1521: if (untie(%hash)) {
1522: Reply($client, "ok\n", $userinput);
1523: } else {
1524: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1525: "while attempting rolesdel\n", $userinput);
1526: }
1527: } else {
1528: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1529: "while attempting rolesdel\n", $userinput);
1530: }
1531:
1532: return 1;
1.178.2.1 foxr 1533: }
1534: RegisterHandler("rolesdel", \&RolesDeleteHandler, 1,1, 0); # Encoded client only
1535:
1536: # Unencrypted get from a user's profile database. See
1537: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
1538: # This function retrieves a keyed item from a specific named database in the
1539: # user's directory.
1540: #
1541: # Parameters:
1542: # $cmd - Command request keyword (get).
1543: # $tail - Tail of the command. This is a colon separated list
1544: # consisting of the domain and username that uniquely
1545: # identifies the profile,
1546: # The 'namespace' which selects the gdbm file to
1547: # do the lookup in,
1548: # & separated list of keys to lookup. Note that
1549: # the values are returned as an & separated list too.
1550: # $client - File descriptor open on the client.
1551: # Returns:
1552: # 1 - Continue processing.
1553: # 0 - Exit.
1554: #
1555: sub GetProfileEntry {
1.178.2.4 albertel 1556: my $cmd = shift;
1557: my $tail = shift;
1558: my $client = shift;
1559: my $userinput= "$cmd:$tail";
1560:
1561: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1562: $namespace=~s/\//\_/g;
1563: $namespace=~s/\W//g;
1564: chomp($what);
1565: my @queries=split(/\&/,$what);
1566: my $proname=propath($udom,$uname);
1567: my $qresult='';
1568: my %hash;
1569: if (tie(%hash,'GDBM_File',"$proname/$namespace.db", &GDBM_READER(),0640)) {
1570: for (my $i=0;$i<=$#queries;$i++) {
1571: $qresult.="$hash{$queries[$i]}&"; # Presumably failure gives empty string.
1572: }
1573: if (untie(%hash)) {
1574: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1575: Reply($client, "$qresult\n", $userinput);
1576: } else {
1577: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1578: "while attempting get\n", $userinput);
1579: }
1580: } else {
1581: if ($!+0 == 2) { # +0 coerces errno -> number 2 is ENOENT
1582: Failure($client, "error:No such file or ".
1583: "GDBM reported bad block error\n", $userinput);
1584: } else { # Some other undifferentiated err.
1585: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1586: "while attempting get\n", $userinput);
1587: }
1588: }
1589: return 1;
1.178.2.1 foxr 1590: }
1591: RegisterHandler("get", \&GetProfileEntry, 0,1,0);
1592: #
1593: # Process the encrypted get request. Note that the request is sent
1594: # in clear, but the reply is encrypted. This is a small covert channel:
1595: # information about the sensitive keys is given to the snooper. Just not
1596: # information about the values of the sensitive key. Hmm if I wanted to
1597: # know these I'd snoop for the egets. Get the profile item names from them
1598: # and then issue a get for them since there's no enforcement of the
1599: # requirement of an encrypted get for particular profile items. If I
1600: # were re-doing this, I'd force the request to be encrypted as well as the
1601: # reply. I'd also just enforce encrypted transactions for all gets since
1602: # that would prevent any covert channel snooping.
1603: #
1604: # Parameters:
1605: # $cmd - Command keyword of request (eget).
1606: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
1607: # $client - File open on the client.
1608: # Returns:
1609: # 1 - Continue processing
1610: # 0 - server should exit.
1611: sub GetProfileEntryEncrypted {
1.178.2.4 albertel 1612: my $cmd = shift;
1613: my $tail = shift;
1614: my $client = shift;
1615: my $userinput = "$cmd:$tail";
1616:
1617: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
1618: $namespace=~s/\//\_/g;
1619: $namespace=~s/\W//g;
1620: chomp($what);
1621: my @queries=split(/\&/,$what);
1622: my $proname=propath($udom,$uname);
1623: my $qresult='';
1624: my %hash;
1625: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1626: for (my $i=0;$i<=$#queries;$i++) {
1627: $qresult.="$hash{$queries[$i]}&";
1628: }
1629: if (untie(%hash)) {
1630: $qresult=~s/\&$//;
1631: if ($cipher) {
1632: my $cmdlength=length($qresult);
1633: $qresult.=" ";
1634: my $encqresult='';
1635: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1636: $encqresult.= unpack("H16", $cipher->encrypt(substr($qresult,
1637: $encidx,
1638: 8)));
1639: }
1640: Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
1641: } else {
1642: Failure( $client, "error:no_key\n", $userinput);
1643: }
1644: } else {
1645: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1646: "while attempting eget\n", $userinput);
1647: }
1648: } else {
1649: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1650: "while attempting eget\n", $userinput);
1651: }
1652:
1653: return 1;
1.178.2.1 foxr 1654: }
1655: RegisterHandler("eget", \&GetProfileEncrypted, 0, 1, 0);
1656:
1657: #
1658: # Deletes a key in a user profile database.
1659: #
1660: # Parameters:
1661: # $cmd - Command keyword (del).
1662: # $tail - Command tail. IN this case a colon
1663: # separated list containing:
1664: # The domain and user that identifies uniquely
1665: # the identity of the user.
1666: # The profile namespace (name of the profile
1667: # database file).
1668: # & separated list of keywords to delete.
1669: # $client - File open on client socket.
1670: # Returns:
1671: # 1 - Continue processing
1672: # 0 - Exit server.
1673: #
1674: #
1675: sub DeletProfileEntry {
1.178.2.4 albertel 1676: my $cmd = shift;
1677: my $tail = shift;
1678: my $client = shift;
1679: my $userinput = "cmd:$tail";
1680:
1681: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1682: $namespace=~s/\//\_/g;
1683: $namespace=~s/\W//g;
1684: chomp($what);
1685: my $proname=propath($udom,$uname);
1686: my $now=time;
1687: unless ($namespace=~/^nohist\_/) {
1688: my $hfh;
1689: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1690: print $hfh "D:$now:$what\n";
1691: }
1692: }
1693: my @keys=split(/\&/,$what);
1694: my %hash;
1695: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1696: foreach my $key (@keys) {
1697: delete($hash{$key});
1698: }
1699: if (untie(%hash)) {
1700: Reply($client, "ok\n", $userinput);
1701: } else {
1702: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1703: "while attempting del\n", $userinput);
1704: }
1705: } else {
1706: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1707: "while attempting del\n", $userinput);
1708: }
1709: return 1;
1.178.2.1 foxr 1710: }
1711: RegisterHandler("del", \&DeleteProfileEntry, 0, 1, 0);
1712: #
1713: # List the set of keys that are defined in a profile database file.
1714: # A successful reply from this will contain an & separated list of
1715: # the keys.
1716: # Parameters:
1717: # $cmd - Command request (keys).
1718: # $tail - Remainder of the request, a colon separated
1719: # list containing domain/user that identifies the
1720: # user being queried, and the database namespace
1721: # (database filename essentially).
1722: # $client - File open on the client.
1723: # Returns:
1724: # 1 - Continue processing.
1725: # 0 - Exit the server.
1726: #
1727: sub GetProfileKeys {
1.178.2.4 albertel 1728: my $cmd = shift;
1729: my $tail = shift;
1730: my $client = shift;
1731: my $userinput = "$cmd:$tail";
1732:
1733: my ($udom,$uname,$namespace)=split(/:/,$tail);
1734: $namespace=~s/\//\_/g;
1735: $namespace=~s/\W//g;
1736: my $proname=propath($udom,$uname);
1737: my $qresult='';
1738: my %hash;
1739: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1740: foreach my $key (keys %hash) {
1741: $qresult.="$key&";
1742: }
1743: if (untie(%hash)) {
1744: $qresult=~s/\&$//;
1745: Reply($client, "$qresult\n", $userinput);
1746: } else {
1747: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1748: "while attempting keys\n", $userinput);
1749: }
1750: } else {
1751: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1752: "while attempting keys\n", $userinput);
1753: }
1.178.2.1 foxr 1754:
1.178.2.4 albertel 1755: return 1;
1.178.2.1 foxr 1756: }
1757: RegisterHandler("keys", \&GetProfileKeys, 0, 1, 0);
1758: #
1759: # Dump the contents of a user profile database.
1760: # Note that this constitutes a very large covert channel too since
1761: # the dump will return sensitive information that is not encrypted.
1762: # The naive security assumption is that the session negotiation ensures
1763: # our client is trusted and I don't believe that's assured at present.
1764: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
1765: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
1766: #
1767: # Parameters:
1768: # $cmd - The command request keyword (currentdump).
1769: # $tail - Remainder of the request, consisting of a colon
1770: # separated list that has the domain/username and
1771: # the namespace to dump (database file).
1772: # $client - file open on the remote client.
1773: # Returns:
1774: # 1 - Continue processing.
1775: # 0 - Exit the server.
1776: #
1777: sub DumpProfileDatabase {
1.178.2.4 albertel 1778: my $cmd = shift;
1779: my $tail = shift;
1780: my $client = shift;
1781: my $userinput = "$cmd:$tail";
1782:
1783: my ($udom,$uname,$namespace) = split(/:/,$tail);
1784: $namespace=~s/\//\_/g;
1785: $namespace=~s/\W//g;
1786: my $qresult='';
1787: my $proname=propath($udom,$uname);
1788: my %hash;
1789: if (tie(%hash,'GDBM_File',"$proname/$namespace.db", &GDBM_READER(),0640)) {
1790: # Structure of %data:
1791: # $data{$symb}->{$parameter}=$value;
1792: # $data{$symb}->{'v.'.$parameter}=$version;
1793: # since $parameter will be unescaped, we do not
1794: # have to worry about silly parameter names...
1795: my %data = (); # A hash of anonymous hashes..
1796: while (my ($key,$value) = each(%hash)) {
1797: my ($v,$symb,$param) = split(/:/,$key);
1798: next if ($v eq 'version' || $symb eq 'keys');
1799: next if (exists($data{$symb}) &&
1800: exists($data{$symb}->{$param}) &&
1801: $data{$symb}->{'v.'.$param} > $v);
1802: $data{$symb}->{$param}=$value;
1803: $data{$symb}->{'v.'.$param}=$v;
1804: }
1805: if (untie(%hash)) {
1806: while (my ($symb,$param_hash) = each(%data)) {
1807: while(my ($param,$value) = each (%$param_hash)){
1808: next if ($param =~ /^v\./); # Ignore versions...
1809: #
1810: # Just dump the symb=value pairs separated by &
1811: #
1812: $qresult.=$symb.':'.$param.'='.$value.'&';
1813: }
1814: }
1815: chop($qresult);
1816: Reply($client , "$qresult\n", $userinput);
1817: } else {
1818: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1819: "while attempting currentdump\n", $userinput);
1820: }
1821: } else {
1822: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1823: "while attempting currentdump\n", $userinput);
1824: }
1.178.2.1 foxr 1825:
1.178.2.4 albertel 1826: return 1;
1.178.2.1 foxr 1827: }
1828: RegisterHandler("currentdump", \&DumpProfileDatabase, 0, 1, 0);
1829: #
1830: # Dump a profile database with an optional regular expression
1831: # to match against the keys. In this dump, no effort is made
1832: # to separate symb from version information. Presumably the
1833: # databases that are dumped by this command are of a different
1834: # structure. Need to look at this and improve the documentation of
1835: # both this and the currentdump handler.
1836: # Parameters:
1837: # $cmd - The command keyword.
1838: # $tail - All of the characters after the $cmd:
1839: # These are expected to be a colon
1840: # separated list containing:
1841: # domain/user - identifying the user.
1842: # namespace - identifying the database.
1843: # regexp - optional regular expression
1844: # that is matched against
1845: # database keywords to do
1846: # selective dumps.
1847: # $client - Channel open on the client.
1848: # Returns:
1849: # 1 - Continue processing.
1850: # Side effects:
1851: # response is written to $client.
1852: #
1853: sub DumpWithRegexp {
1.178.2.4 albertel 1854: my $cmd = shift;
1855: my $tail = shift;
1856: my $client = shift;
1857:
1858: my $userinput = "$cmd:$tail";
1859:
1860: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
1861: $namespace=~s/\//\_/g;
1862: $namespace=~s/\W//g;
1863: if (defined($regexp)) {
1864: $regexp=&unescape($regexp);
1865: } else {
1866: $regexp='.';
1867: }
1868: my $qresult='';
1869: my $proname=propath($udom,$uname);
1870: my %hash;
1871: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
1872: &GDBM_READER(),0640)) {
1873: while (my ($key,$value) = each(%hash)) {
1874: if ($regexp eq '.') {
1875: $qresult.=$key.'='.$value.'&';
1876: } else {
1877: my $unescapeKey = &unescape($key);
1878: if (eval('$unescapeKey=~/$regexp/')) {
1879: $qresult.="$key=$value&";
1880: }
1881: }
1882: }
1883: if (untie(%hash)) {
1884: chop($qresult);
1885: Reply($client, "$qresult\n", $userinput);
1886: } else {
1887: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
1888: "while attempting dump\n", $userinput);
1889: }
1890: } else {
1891: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
1892: "while attempting dump\n", $userinput);
1893: }
1.178.2.1 foxr 1894:
1895: return 1;
1896: }
1897: RegisterHandler("dump", \&DumpWithRegexp, 0, 1, 0);
1898:
1899: # Store an aitem in any database but the roles database.
1900: #
1901: # Parameters:
1902: # $cmd - Request command keyword.
1903: # $tail - Tail of the request. This is a colon
1904: # separated list containing:
1905: # domain/user - User and authentication domain.
1906: # namespace - Name of the database being modified
1907: # rid - Resource keyword to modify.
1908: # what - new value associated with rid.
1909: #
1910: # $client - Socket open on the client.
1911: #
1912: #
1913: # Returns:
1914: # 1 (keep on processing).
1915: # Side-Effects:
1916: # Writes to the client
1917: sub StoreHandler {
1.178.2.4 albertel 1918: my $cmd = shift;
1919: my $tail = shift;
1920: my $client = shift;
1.178.2.1 foxr 1921:
1.178.2.4 albertel 1922: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 1923:
1.178.2.4 albertel 1924: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
1925: $namespace=~s/\//\_/g;
1926: $namespace=~s/\W//g;
1927: if ($namespace ne 'roles') {
1928: chomp($what);
1929: my $proname=propath($udom,$uname);
1930: my $now=time;
1931: unless ($namespace=~/^nohist\_/) {
1932: my $hfh;
1933: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1934: print $hfh "P:$now:$rid:$what\n";
1935: }
1936: }
1937: my @pairs=split(/\&/,$what);
1938: my %hash;
1939: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
1940: &GDBM_WRCREAT(),0640)) {
1941: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1942: my $key;
1943: $hash{"version:$rid"}++;
1944: my $version=$hash{"version:$rid"};
1945: my $allkeys='';
1946: foreach my $pair (@pairs) {
1947: my ($key,$value)=split(/=/,$pair);
1948: $allkeys.=$key.':';
1949: $hash{"$version:$rid:$key"}=$value;
1950: }
1951: $hash{"$version:$rid:timestamp"}=$now;
1952: $allkeys.='timestamp';
1953: $hash{"$version:keys:$rid"}=$allkeys;
1954: if (untie(%hash)) {
1955: Reply($client, "ok\n", $userinput);
1956: } else {
1957: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
1958: "while attempting store\n", $userinput);
1959: }
1960: } else {
1961: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1962: "while attempting store\n", $userinput);
1963: }
1964: } else {
1965: Failure($client, "refused\n", $userinput);
1.178.2.1 foxr 1966: }
1967:
1.178.2.4 albertel 1968: return 1;
1.178.2.1 foxr 1969: }
1970: RegisterHandler("store", \&StoreHandler, 0, 1, 0);
1971: #
1972: # Restore a prior version of a resource.
1973: #
1974: # Parameters:
1975: # $cmd - Command keyword.
1976: # $tail - Remainder of the request which consists of:
1977: # domain/user - User and auth. domain.
1978: # namespace - name of resource database.
1979: # rid - Resource id.
1980: # $client - socket open on the client.
1981: #
1982: # Returns:
1983: # 1 indicating the caller should not yet exit.
1984: # Side-effects:
1985: # Writes a reply to the client.
1986: #
1987: sub RestoreHandler {
1.178.2.4 albertel 1988: my $cmd = shift;
1989: my $tail = shift;
1990: my $client = shift;
1991:
1992: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
1993:
1994: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
1995: $namespace=~s/\//\_/g;
1996: $namespace=~s/\W//g;
1997: chomp($rid);
1998: my $proname=propath($udom,$uname);
1999: my $qresult='';
2000: my %hash;
2001: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2002: &GDBM_READER(),0640)) {
2003: my $version=$hash{"version:$rid"};
2004: $qresult.="version=$version&";
2005: my $scope;
2006: for ($scope=1;$scope<=$version;$scope++) {
2007: my $vkeys=$hash{"$scope:keys:$rid"};
2008: my @keys=split(/:/,$vkeys);
2009: my $key;
2010: $qresult.="$scope:keys=$vkeys&";
2011: foreach $key (@keys) {
2012: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2013: }
2014: }
2015: if (untie(%hash)) {
2016: $qresult=~s/\&$//;
2017: Reply( $client, "$qresult\n", $userinput);
2018: } else {
2019: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2020: "while attempting restore\n", $userinput);
2021: }
2022: } else {
2023: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2024: "while attempting restore\n", $userinput);
2025: }
1.178.2.1 foxr 2026:
1.178.2.4 albertel 2027: return 1;
1.178.2.1 foxr 2028:
2029:
2030: }
2031: RegisterHandler("restor", \&RestoreHandler, 0,1,0);
2032:
2033: #
2034: # Add a chat message to to a discussion board.
2035: #
2036: # Parameters:
2037: # $cmd - Request keyword.
2038: # $tail - Tail of the command. A colon separated list
2039: # containing:
2040: # cdom - Domain on which the chat board lives
2041: # cnum - Identifier of the discussion group.
2042: # post - Body of the posting.
2043: # $client - Socket open on the client.
2044: # Returns:
2045: # 1 - Indicating caller should keep on processing.
2046: #
2047: # Side-effects:
2048: # writes a reply to the client.
2049: #
2050: #
2051: sub SendChatHandler {
1.178.2.4 albertel 2052: my $cmd = shift;
2053: my $tail = shift;
2054: my $client = shift;
2055:
2056: my $userinput = "$cmd:$tail";
1.178.2.1 foxr 2057:
1.178.2.4 albertel 2058: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2059: &chatadd($cdom,$cnum,$newpost);
2060: Reply($client, "ok\n", $userinput);
1.178.2.1 foxr 2061:
1.178.2.4 albertel 2062: return 1;
1.178.2.1 foxr 2063: }
2064: RegisterHandler("chatsend", \&SendChatHandler, 0, 1, 0);
2065: #
2066: # Retrieve the set of chat messagss from a discussion board.
2067: #
2068: # Parameters:
2069: # $cmd - Command keyword that initiated the request.
2070: # $tail - Remainder of the request after the command
2071: # keyword. In this case a colon separated list of
2072: # chat domain - Which discussion board.
2073: # chat id - Discussion thread(?)
2074: # domain/user - Authentication domain and username
2075: # of the requesting person.
2076: # $client - Socket open on the client program.
2077: # Returns:
2078: # 1 - continue processing
2079: # Side effects:
2080: # Response is written to the client.
2081: #
2082: sub RetrieveChatHandler {
1.178.2.4 albertel 2083: my $cmd = shift;
2084: my $tail = shift;
2085: my $client = shift;
2086:
2087: my $userinput = "$cmd:$tail";
2088:
2089: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
2090: my $reply='';
2091: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2092: $reply.=&escape($_).':';
2093: }
2094: $reply=~s/\:$//;
2095: Reply($client, $reply."\n", $userinput);
1.178.2.1 foxr 2096:
2097:
1.178.2.4 albertel 2098: return 1;
1.178.2.1 foxr 2099: }
2100: RegisterHandler("chatretr", \&RetrieveChatHandler, 0, 1, 0);
2101: #
2102: # Initiate a query of an sql database. SQL query repsonses get put in
2103: # a file for later retrieval. This prevents sql query results from
2104: # bottlenecking the system. Note that with loncnew, perhaps this is
2105: # less of an issue since multiple outstanding requests can be concurrently
2106: # serviced.
2107: #
2108: # Parameters:
2109: # $cmd - COmmand keyword that initiated the request.
2110: # $tail - Remainder of the command after the keyword.
2111: # For this function, this consists of a query and
2112: # 3 arguments that are self-documentingly labelled
2113: # in the original arg1, arg2, arg3.
2114: # $client - Socket open on the client.
2115: # Return:
2116: # 1 - Indicating processing should continue.
2117: # Side-effects:
2118: # a reply is written to $client.
2119: #
2120: sub SendQueryHandler {
1.178.2.4 albertel 2121: my $cmd = shift;
2122: my $tail = shift;
2123: my $client = shift;
2124:
2125: my $userinput = "$cmd:$tail";
2126:
2127: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
2128: $query=~s/\n*$//g;
2129: Reply($client, "". sqlreply("$clientname\&$query".
2130: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
2131: $userinput);
2132:
2133: return 1;
1.178.2.1 foxr 2134: }
2135: RegisterHandler("querysend", \&SendQueryHandler, 0, 1, 0);
2136:
2137: #
2138: # Add a reply to an sql query. SQL queries are done asyncrhonously.
2139: # The query is submitted via a "querysend" transaction.
2140: # There it is passed on to the lonsql daemon, queued and issued to
2141: # mysql.
2142: # This transaction is invoked when the sql transaction is complete
2143: # it stores the query results in flie and indicates query completion.
2144: # presumably local software then fetches this response... I'm guessing
2145: # the sequence is: lonc does a querysend, we ask lonsql to do it.
2146: # lonsql on completion of the query interacts with the lond of our
2147: # client to do a query reply storing two files:
2148: # - id - The results of the query.
2149: # - id.end - Indicating the transaction completed.
2150: # NOTE: id is a unique id assigned to the query and querysend time.
2151: # Parameters:
2152: # $cmd - Command keyword that initiated this request.
2153: # $tail - Remainder of the tail. In this case that's a colon
2154: # separated list containing the query Id and the
2155: # results of the query.
2156: # $client - Socket open on the client.
2157: # Return:
2158: # 1 - Indicating that we should continue processing.
2159: # Side effects:
2160: # ok written to the client.
2161: #
2162: sub ReplyQueryHandler {
1.178.2.4 albertel 2163: my $cmd = shift;
2164: my $tail = shift;
2165: my $client = shift;
2166:
2167: my $userinput = "$cmd:$tail";
2168:
2169: my ($cmd,$id,$reply)=split(/:/,$userinput);
2170: my $store;
2171: my $execdir=$perlvar{'lonDaemons'};
2172: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2173: $reply=~s/\&/\n/g;
2174: print $store $reply;
2175: close $store;
2176: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2177: print $store2 "done\n";
2178: close $store2;
2179: Reply($client, "ok\n", $userinput);
2180: } else {
2181: Failure($client, "error: ".($!+0)
2182: ." IO::File->new Failed ".
2183: "while attempting queryreply\n", $userinput);
2184: }
1.178.2.1 foxr 2185:
2186:
1.178.2.4 albertel 2187: return 1;
1.178.2.1 foxr 2188: }
2189: RegisterHandler("queryreply", \&ReplyQueryHandler, 0, 1, 0);
2190: #
2191: # Process the courseidput query. Not quite sure what this means
2192: # at the system level sense. It appears a gdbm file in the
2193: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
2194: # a set of entries made in that database.
2195: #
2196: # Parameters:
2197: # $cmd - The command keyword that initiated this request.
2198: # $tail - Tail of the command. In this case consists of a colon
2199: # separated list contaning the domain to apply this to and
2200: # an ampersand separated list of keyword=value pairs.
2201: # $client - Socket open on the client.
2202: # Returns:
2203: # 1 - indicating that processing should continue
2204: #
2205: # Side effects:
2206: # reply is written to the client.
2207: #
2208: sub PutCourseIdHandler {
1.178.2.4 albertel 2209: my $cmd = shift;
2210: my $tail = shift;
2211: my $client = shift;
1.178.2.1 foxr 2212:
1.178.2.4 albertel 2213: my $userinput = "$cmd:$tail";
2214:
2215: my ($udom,$what)=split(/:/,$tail);
2216: chomp($what);
2217: $udom=~s/\W//g;
2218: my $proname=
2219: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2220: my $now=time;
2221: my @pairs=split(/\&/,$what);
2222: my %hash;
2223: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2224: foreach my $pair (@pairs) {
2225: my ($key,$value)=split(/=/,$pair);
2226: $hash{$key}=$value.':'.$now;
2227: }
2228: if (untie(%hash)) {
2229: Reply($client, "ok\n", $userinput);
2230: } else {
2231: Failure( $client, "error: ".($!+0)
2232: ." untie(GDBM) Failed ".
2233: "while attempting courseidput\n", $userinput);
2234: }
2235: } else {
2236: Failure( $client, "error: ".($!+0)
2237: ." tie(GDBM) Failed ".
2238: "while attempting courseidput\n", $userinput);
2239: }
2240:
2241: return 1;
1.178.2.1 foxr 2242: }
2243: RegisterHandler("courseidput", \&PutCourseIdHandler, 0, 1, 0);
2244:
2245: # Retrieves the value of a course id resource keyword pattern
2246: # defined since a starting date. Both the starting date and the
2247: # keyword pattern are optional. If the starting date is not supplied it
2248: # is treated as the beginning of time. If the pattern is not found,
2249: # it is treatred as "." matching everything.
2250: #
2251: # Parameters:
2252: # $cmd - Command keyword that resulted in us being dispatched.
2253: # $tail - The remainder of the command that, in this case, consists
2254: # of a colon separated list of:
2255: # domain - The domain in which the course database is
2256: # defined.
2257: # since - Optional parameter describing the minimum
2258: # time of definition(?) of the resources that
2259: # will match the dump.
2260: # description - regular expression that is used to filter
2261: # the dump. Only keywords matching this regexp
2262: # will be used.
2263: # $client - The socket open on the client.
2264: # Returns:
2265: # 1 - Continue processing.
2266: # Side Effects:
2267: # a reply is written to $client.
2268: sub DumpCourseIdHandler {
1.178.2.4 albertel 2269: my $cmd = shift;
2270: my $tail = shift;
2271: my $client = shift;
2272:
2273: my $userinput = "$cmd:$tail";
2274:
2275: my ($udom,$since,$description) =split(/:/,$tail);
2276: if (defined($description)) {
2277: $description=&unescape($description);
2278: } else {
2279: $description='.';
2280: }
2281: unless (defined($since)) { $since=0; }
2282: my $qresult='';
2283: my $proname = "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2284: my %hash;
2285: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2286: while (my ($key,$value) = each(%hash)) {
2287: my ($descr,$lasttime)=split(/\:/,$value);
2288: if ($lasttime<$since) {
2289: next;
2290: }
2291: if ($description eq '.') {
2292: $qresult.=$key.'='.$descr.'&';
2293: } else {
2294: my $unescapeVal = &unescape($descr);
2295: if (eval('$unescapeVal=~/$description/i')) {
2296: $qresult.="$key=$descr&";
2297: }
2298: }
2299: }
2300: if (untie(%hash)) {
2301: chop($qresult);
2302: Reply($client, "$qresult\n", $userinput);
2303: } else {
2304: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2305: "while attempting courseiddump\n", $userinput);
2306: }
2307: } else {
2308: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2309: "while attempting courseiddump\n", $userinput);
2310: }
1.178.2.1 foxr 2311:
2312:
1.178.2.4 albertel 2313: return 1;
1.178.2.1 foxr 2314: }
2315: RegisterHandler("courseiddump", \&DumpCourseIdHandler, 0, 1, 0);
2316: #
2317: # Puts an id to a domains id database.
2318: #
2319: # Parameters:
2320: # $cmd - The command that triggered us.
2321: # $tail - Remainder of the request other than the command. This is a
2322: # colon separated list containing:
2323: # $domain - The domain for which we are writing the id.
2324: # $pairs - The id info to write... this is and & separated list
2325: # of keyword=value.
2326: # $client - Socket open on the client.
2327: # Returns:
2328: # 1 - Continue processing.
2329: # Side effects:
2330: # reply is written to $client.
2331: #
2332: sub PutIdHandler {
1.178.2.4 albertel 2333: my $cmd = shift;
2334: my $tail = shift;
2335: my $client = shift;
2336:
2337: my $userinput = "$cmd:$tail";
2338:
2339: my ($udom,$what)=split(/:/,$tail);
2340: chomp($what);
2341: $udom=~s/\W//g;
2342: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2343: my $now=time;
2344: {
2345: my $hfh;
2346: if ($hfh=IO::File->new(">>$proname.hist")) {
2347: print $hfh "P:$now:$what\n";
2348: }
2349: }
2350: my @pairs=split(/\&/,$what);
2351: my %hash;
2352: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2353: foreach my $pair (@pairs) {
2354: my ($key,$value)=split(/=/,$pair);
2355: $hash{$key}=$value;
2356: }
2357: if (untie(%hash)) {
2358: Reply($client, "ok\n", $userinput);
2359: } else {
2360: Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2361: "while attempting idput\n", $userinput);
2362: }
2363: } else {
2364: Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2365: "while attempting idput\n", $userinput);
1.178.2.1 foxr 2366: }
2367:
1.178.2.4 albertel 2368: return 1;
1.178.2.1 foxr 2369: }
2370:
2371: RegisterHandler("idput", \&PutIdHandler, 0, 1, 0);
2372: #
2373: # Retrieves a set of id values from the id database.
2374: # Returns an & separated list of results, one for each requested id to the
2375: # client.
2376: #
2377: # Parameters:
2378: # $cmd - Command keyword that caused us to be dispatched.
2379: # $tail - Tail of the command. Consists of a colon separated:
2380: # domain - the domain whose id table we dump
2381: # ids Consists of an & separated list of
2382: # id keywords whose values will be fetched.
2383: # nonexisting keywords will have an empty value.
2384: # $client - Socket open on the client.
2385: #
2386: # Returns:
2387: # 1 - indicating processing should continue.
2388: # Side effects:
2389: # An & separated list of results is written to $client.
2390: #
2391: sub GetIdHandler {
1.178.2.4 albertel 2392: my $cmd = shift;
2393: my $tail = shift;
2394: my $client = shift;
2395:
2396: my $userinput = "$client:$tail";
2397:
2398: my ($udom,$what)=split(/:/,$tail);
2399: chomp($what);
2400: $udom=~s/\W//g;
2401: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2402: my @queries=split(/\&/,$what);
2403: my $qresult='';
2404: my %hash;
2405: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2406: for (my $i=0;$i<=$#queries;$i++) {
2407: $qresult.="$hash{$queries[$i]}&";
2408: }
2409: if (untie(%hash)) {
2410: $qresult=~s/\&$//;
2411: Reply($client, "$qresult\n", $userinput);
2412: } else {
2413: Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2414: "while attempting idget\n",$userinput);
2415: }
2416: } else {
2417: Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2418: "while attempting idget\n",$userinput);
2419: }
1.178.2.1 foxr 2420:
1.178.2.4 albertel 2421: return 1;
1.178.2.1 foxr 2422: }
1.178.2.3 foxr 2423:
1.178.2.1 foxr 2424: RegisterHandler("idget", \&GetIdHandler, 0, 1, 0);
1.178.2.3 foxr 2425: #
2426: # Process the tmpput command I'm not sure what this does.. Seems to
2427: # create a file in the lonDaemons/tmp directory of the form $id.tmp
2428: # where Id is the client's ip concatenated with a sequence number.
2429: # The file will contain some value that is passed in. Is this e.g.
2430: # a login token?
2431: #
2432: # Parameters:
2433: # $cmd - The command that got us dispatched.
2434: # $tail - The remainder of the request following $cmd:
2435: # In this case this will be the contents of the file.
2436: # $client - Socket connected to the client.
2437: # Returns:
2438: # 1 indicating processing can continue.
2439: # Side effects:
2440: # A file is created in the local filesystem.
2441: # A reply is sent to the client.
2442: sub TmpPutHandler {
1.178.2.4 albertel 2443: my $cmd = shift;
2444: my $what = shift;
2445: my $client = shift;
2446:
2447: my $userinput = "$cmd:$what"; # Reconstruct for logging.
2448:
2449:
2450: my $store;
2451: $tmpsnum++;
2452: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2453: $id=~s/\W/\_/g;
2454: $what=~s/\n//g;
2455: my $execdir=$perlvar{'lonDaemons'};
2456: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2457: print $store $what;
2458: close $store;
2459: Reply($client, "$id\n", $userinput);
2460: } else {
2461: Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
2462: "while attempting tmpput\n", $userinput);
2463: }
2464: return 1;
1.178.2.3 foxr 2465:
2466: }
2467: RegisterHandler("tmpput", \&TmpPutHandler, 0, 1, 0);
2468:
2469: # Processes the tmpget command. This command returns the contents
2470: # of a temporary resource file(?) created via tmpput.
2471: #
2472: # Paramters:
2473: # $cmd - Command that got us dispatched.
2474: # $id - Tail of the command, contain the id of the resource
2475: # we want to fetch.
2476: # $client - socket open on the client.
2477: # Return:
2478: # 1 - Inidcating processing can continue.
2479: # Side effects:
2480: # A reply is sent to the client.
2481:
2482: #
2483: sub TmpGetHandler {
1.178.2.4 albertel 2484: my $cmd = shift;
2485: my $id = shift;
2486: my $client = shift;
2487: my $userinput = "$cmd:$id";
2488:
2489: chomp($id);
2490: $id=~s/\W/\_/g;
2491: my $store;
2492: my $execdir=$perlvar{'lonDaemons'};
2493: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2494: my $reply=<$store>;
2495: Reply( $client, "$reply\n", $userinput);
2496: close $store;
2497: } else {
2498: Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
2499: "while attempting tmpget\n", $userinput);
2500: }
1.178.2.3 foxr 2501:
1.178.2.4 albertel 2502: return 1;
1.178.2.3 foxr 2503: }
2504: RegisterHandler("tmpget", \&TmpGetHandler, 0, 1, 0);
2505: #
2506: # Process the tmpdel command. This command deletes a temp resource
2507: # created by the tmpput command.
2508: #
2509: # Parameters:
2510: # $cmd - Command that got us here.
2511: # $id - Id of the temporary resource created.
2512: # $client - socket open on the client process.
2513: #
2514: # Returns:
2515: # 1 - Indicating processing should continue.
2516: # Side Effects:
2517: # A file is deleted
2518: # A reply is sent to the client.
2519: sub TmpDelHandler {
1.178.2.4 albertel 2520: my $cmd = shift;
2521: my $id = shift;
2522: my $client = shift;
2523:
2524: my $userinput= "$cmd:$id";
1.178.2.3 foxr 2525:
1.178.2.4 albertel 2526: chomp($id);
2527: $id=~s/\W/\_/g;
2528: my $execdir=$perlvar{'lonDaemons'};
2529: if (unlink("$execdir/tmp/$id.tmp")) {
2530: Reply($client, "ok\n", $userinput);
2531: } else {
2532: Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
2533: "while attempting tmpdel\n", $userinput);
2534: }
2535:
2536: return 1;
1.178.2.3 foxr 2537:
2538: }
2539: RegisterHandler("tmpdel", \&TmpDelHandler, 0, 1, 0);
2540: #
2541: # ls - list the contents of a directory. For each file in the
2542: # selected directory the filename followed by the full output of
2543: # the stat function is returned. The returned info for each
2544: # file are separated by ':'. The stat fields are separated by &'s.
2545: # Parameters:
2546: # $cmd - The command that dispatched us (ls).
2547: # $ulsdir - The directory path to list... I'm not sure what this
2548: # is relative as things like ls:. return e.g.
2549: # no_such_dir.
2550: # $client - Socket open on the client.
2551: # Returns:
2552: # 1 - indicating that the daemon should not disconnect.
2553: # Side Effects:
2554: # The reply is written to $client.
2555: #
2556: sub LsHandler {
1.178.2.4 albertel 2557: my $cmd = shift;
2558: my $ulsdir = shift;
2559: my $client = shift;
1.178.2.3 foxr 2560:
1.178.2.4 albertel 2561: my $userinput = "$cmd:$ulsdir";
1.178.2.3 foxr 2562:
1.178.2.4 albertel 2563: my $ulsout='';
2564: my $ulsfn;
2565: if (-e $ulsdir) {
2566: if(-d $ulsdir) {
2567: if (opendir(LSDIR,$ulsdir)) {
2568: while ($ulsfn=readdir(LSDIR)) {
2569: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2570: $ulsout.=$ulsfn.'&'.
2571: join('&',@ulsstats).':';
2572: }
2573: closedir(LSDIR);
2574: }
2575: } else {
2576: my @ulsstats=stat($ulsdir);
2577: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2578: }
2579: } else {
2580: $ulsout='no_such_dir';
2581: }
2582: if ($ulsout eq '') { $ulsout='empty'; }
2583: Reply($client, "$ulsout\n", $userinput);
2584:
2585:
2586: return 1;
1.178.2.3 foxr 2587: }
2588: RegisterHandler("ls", \&LsHandler, 0, 1, 0);
2589:
2590:
2591: #
2592: # Processes the setannounce command. This command
2593: # creates a file named announce.txt in the top directory of
2594: # the documentn root and sets its contents. The announce.txt file is
2595: # printed in its entirety at the LonCAPA login page. Note:
2596: # once the announcement.txt fileis created it cannot be deleted.
2597: # However, setting the contents of the file to empty removes the
2598: # announcement from the login page of loncapa so who cares.
2599: #
2600: # Parameters:
2601: # $cmd - The command that got us dispatched.
2602: # $announcement - The text of the announcement.
2603: # $client - Socket open on the client process.
2604: # Retunrns:
2605: # 1 - Indicating request processing should continue
2606: # Side Effects:
2607: # The file {DocRoot}/announcement.txt is created.
2608: # A reply is sent to $client.
2609: #
2610: sub SetAnnounceHandler {
1.178.2.4 albertel 2611: my $cmd = shift;
2612: my $announcement = shift;
2613: my $client = shift;
1.178.2.3 foxr 2614:
1.178.2.4 albertel 2615: my $userinput = "$cmd:$announcement";
1.178.2.3 foxr 2616:
1.178.2.4 albertel 2617: chomp($announcement);
2618: $announcement=&unescape($announcement);
2619: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2620: '/announcement.txt')) {
2621: print $store $announcement;
2622: close $store;
2623: Reply($client, "ok\n", $userinput);
2624: } else {
2625: Failure($client, "error: ".($!+0)."\n", $userinput);
2626: }
1.178.2.3 foxr 2627:
1.178.2.4 albertel 2628: return 1;
1.178.2.3 foxr 2629: }
2630: RegisterHandler("setannounce", \&SetAnnounceHandler, 0, 1, 0);
2631:
2632: #
2633: # Return the version of the daemon. This can be used to determine
2634: # the compatibility of cross version installations or, alternatively to
2635: # simply know who's out of date and who isn't. Note that the version
2636: # is returned concatenated with the tail.
2637: # Parameters:
2638: # $cmd - the request that dispatched to us.
2639: # $tail - Tail of the request (client's version?).
2640: # $client - Socket open on the client.
2641: #Returns:
2642: # 1 - continue processing requests.
2643: # Side Effects:
2644: # Replies with version to $client.
2645: sub GetVersionHandler {
1.178.2.4 albertel 2646: my $client = shift;
2647: my $tail = shift;
2648: my $client = shift;
2649: my $userinput = $client;
2650:
2651: Reply($client, &version($userinput)."\n", $userinput);
1.178.2.3 foxr 2652:
2653:
1.178.2.4 albertel 2654: return 1;
1.178.2.3 foxr 2655: }
2656: RegisterHandler("version", \&GetVersionHandler, 0, 1, 0);
2657:
2658: # Set the current host and domain. This is used to support
2659: # multihomed systems. Each IP of the system, or even separate daemons
2660: # on the same IP can be treated as handling a separate lonCAPA virtual
2661: # machine. This command selects the virtual lonCAPA. The client always
2662: # knows the right one since it is lonc and it is selecting the domain/system
2663: # from the hosts.tab file.
2664: # Parameters:
2665: # $cmd - Command that dispatched us.
2666: # $tail - Tail of the command (domain/host requested).
2667: # $socket - Socket open on the client.
2668: #
2669: # Returns:
2670: # 1 - Indicates the program should continue to process requests.
2671: # Side-effects:
2672: # The default domain/system context is modified for this daemon.
2673: # a reply is sent to the client.
2674: #
2675: sub SelectHostHandler {
1.178.2.4 albertel 2676: my $cmd = shift;
2677: my $tail = shift;
2678: my $socket = shift;
1.178.2.3 foxr 2679:
1.178.2.4 albertel 2680: my $userinput ="$cmd:$tail";
1.178.2.3 foxr 2681:
1.178.2.4 albertel 2682: Reply($client, &sethost($userinput)."\n", $userinput);
1.178.2.3 foxr 2683:
2684:
1.178.2.4 albertel 2685: return 1;
1.178.2.3 foxr 2686: }
2687: RegisterHandler("sethost", \&SelectHostHandler, 0, 1, 0);
2688:
2689: # Process a request to exit:
2690: # - "bye" is sent to the client.
2691: # - The client socket is shutdown and closed.
2692: # - We indicate to the caller that we should exit.
2693: # Formal Parameters:
2694: # $cmd - The command that got us here.
2695: # $tail - Tail of the command (empty).
2696: # $client - Socket open on the tail.
2697: # Returns:
2698: # 0 - Indicating the program should exit!!
2699: #
2700: sub ExitHandler {
1.178.2.4 albertel 2701: my $cmd = shift;
2702: my $tail = shift;
2703: my $client = shift;
2704:
2705: my $userinput = "$cmd:$tail";
2706:
2707: &logthis("Client $clientip ($clientname) hanging up: $userinput");
2708: Reply($client, "bye\n", $userinput);
2709: $client->shutdown(2); # shutdown the socket forcibly.
2710: $client->close();
1.178.2.3 foxr 2711:
1.178.2.4 albertel 2712: return 0;
1.178.2.3 foxr 2713: }
2714: RegisterHandler("exit", \&ExitHandler, 0, 1,1);
2715: RegisterHandler("init", \&ExitHandler, 0, 1,1); # RE-init is like exit.
2716: RegisterHandler("quit", \&ExitHandler, 0, 1,1); # I like this too!
1.178.2.1 foxr 2717: #------------------------------------------------------------------------------------
2718: #
2719: # Process a Request. Takes a request from the client validates
2720: # it and performs the operation requested by it. Returns
2721: # a response to the client.
2722: #
2723: # Parameters:
2724: # request - A string containing the user's request.
2725: # Returns:
2726: # 0 - Requested to exit, caller should shut down.
2727: # 1 - Accept additional requests from the client.
2728: #
2729: sub ProcessRequest {
1.178.2.4 albertel 2730: my $Request = shift;
2731: my $KeepGoing = 1; # Assume we're not asked to stop.
1.178.2.1 foxr 2732:
1.178.2.4 albertel 2733: my $wasenc=0;
2734: my $userinput = $Request; # for compatibility with oldcode <yeach>
1.178.2.1 foxr 2735:
2736:
2737: # ------------------------------------------------------------ See if encrypted
2738:
1.178.2.4 albertel 2739: if($userinput =~ /^enc/) {
2740: $wasenc = 1;
2741: $userinput = Decipher($userinput);
2742: if(! $userinput) {
2743: Failure($client,"error:Encrypted data without negotiating key");
2744: return 0; # Break off with this imposter.
2745: }
2746: }
2747: # Split off the request keyword from the rest of the stuff.
1.178.2.1 foxr 2748:
1.178.2.4 albertel 2749: my ($command, $tail) = split(/:/, $userinput, 2);
1.178.2.2 foxr 2750:
1.178.2.4 albertel 2751: Debug("Command received: $command, encoded = $wasenc");
1.178.2.2 foxr 2752:
1.178.2.1 foxr 2753:
2754: # ------------------------------------------------------------- Normal commands
2755:
1.178.2.4 albertel 2756: #
2757: # If the command is in the hash, then execute it via the hash dispatch:
2758: #
2759: if(defined $Dispatcher{$command}) {
2760:
2761: my $DispatchInfo = $Dispatcher{$command};
2762: my $Handler = $$DispatchInfo[0];
2763: my $NeedEncode = $$DispatchInfo[1];
2764: my $ClientTypes = $$DispatchInfo[2];
2765: Debug("Matched dispatch hash: mustencode: $NeedEncode ClientType $ClientTypes");
1.178.2.1 foxr 2766:
1.178.2.4 albertel 2767: # Validate the request:
1.178.2.1 foxr 2768:
1.178.2.4 albertel 2769: my $ok = 1;
2770: my $requesterprivs = 0;
2771: if(isClient()) {
2772: $requesterprivs |= $CLIENT_OK;
2773: }
2774: if(isManager()) {
2775: $requesterprivs |= $MANAGER_OK;
2776: }
2777: if($NeedEncode && (!$wasenc)) {
2778: Debug("Must encode but wasn't: $NeedEncode $wasenc");
2779: $ok = 0;
2780: }
2781: if(($ClientTypes & $requesterprivs) == 0) {
2782: Debug("Client not privileged to do this operation");
2783: $ok = 0;
2784: }
2785:
2786: if($ok) {
2787: Debug("Dispatching to handler $command $tail");
2788: $KeepGoing = &$Handler($command, $tail, $client);
2789: } else {
2790: Debug("Refusing to dispatch because ok is false");
2791: Failure($client, "refused", $userinput);
2792: }
1.161 foxr 2793:
2794:
1.178.2.1 foxr 2795: # ------------------------------------------------------------- unknown command
1.97 foxr 2796:
1.178.2.4 albertel 2797: } else {
1.178.2.1 foxr 2798: # unknown command
1.178.2.4 albertel 2799: Failure($client, "unknown_cmd\n", $userinput);
2800: }
1.97 foxr 2801:
1.178.2.1 foxr 2802: return $KeepGoing;
2803: }
1.97 foxr 2804:
1.96 foxr 2805:
2806: #
1.140 foxr 2807: # GetCertificate: Given a transaction that requires a certificate,
2808: # this function will extract the certificate from the transaction
2809: # request. Note that at this point, the only concept of a certificate
2810: # is the hostname to which we are connected.
2811: #
2812: # Parameter:
2813: # request - The request sent by our client (this parameterization may
2814: # need to change when we really use a certificate granting
2815: # authority.
2816: #
2817: sub GetCertificate {
2818: my $request = shift;
2819:
2820: return $clientip;
2821: }
1.161 foxr 2822:
2823:
2824:
1.156 foxr 2825: #
2826: # ReadManagerTable: Reads in the current manager table. For now this is
2827: # done on each manager authentication because:
2828: # - These authentications are not frequent
2829: # - This allows dynamic changes to the manager table
2830: # without the need to signal to the lond.
2831: #
2832:
2833: sub ReadManagerTable {
2834:
2835: # Clean out the old table first..
2836:
1.178.2.4 albertel 2837: foreach my $key (keys %managers) {
2838: delete $managers{$key};
2839: }
2840:
2841: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
2842: if (!open (MANAGERS, $tablename)) {
2843: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
2844: return;
2845: }
2846: while(my $host = <MANAGERS>) {
2847: chomp($host);
2848: if ($host =~ "^#") { # Comment line.
2849: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
2850: next;
2851: }
2852: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 2853: # The entry is of the form:
2854: # cluname:hostname
2855: # cluname - A 'cluster hostname' is needed in order to negotiate
2856: # the host key.
2857: # hostname- The dns name of the host.
2858: #
1.178.2.4 albertel 2859: my($cluname, $dnsname) = split(/:/, $host);
2860:
2861: my $ip = gethostbyname($dnsname);
2862: if(defined($ip)) { # bad names don't deserve entry.
2863: my $hostip = inet_ntoa($ip);
2864: $managers{$hostip} = $cluname;
2865: logthis('<font color="green"> registering manager '.
2866: "$dnsname as $cluname with $hostip </font>\n");
2867: }
2868: } else {
2869: logthis('<font color="green"> existing host'." $host</font>\n");
2870: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
2871: }
2872: }
1.156 foxr 2873: }
1.140 foxr 2874:
2875: #
2876: # ValidManager: Determines if a given certificate represents a valid manager.
2877: # in this primitive implementation, the 'certificate' is
2878: # just the connecting loncapa client name. This is checked
2879: # against a valid client list in the configuration.
2880: #
2881: #
2882: sub ValidManager {
2883: my $certificate = shift;
2884:
1.163 foxr 2885: return isManager;
1.140 foxr 2886: }
2887: #
1.143 foxr 2888: # CopyFile: Called as part of the process of installing a
2889: # new configuration file. This function copies an existing
2890: # file to a backup file.
2891: # Parameters:
2892: # oldfile - Name of the file to backup.
2893: # newfile - Name of the backup file.
2894: # Return:
2895: # 0 - Failure (errno has failure reason).
2896: # 1 - Success.
2897: #
2898: sub CopyFile {
2899: my $oldfile = shift;
2900: my $newfile = shift;
2901:
2902: # The file must exist:
2903:
2904: if(-e $oldfile) {
2905:
1.178.2.4 albertel 2906: # Read the old file.
1.143 foxr 2907:
2908: my $oldfh = IO::File->new("< $oldfile");
2909: if(!$oldfh) {
2910: return 0;
2911: }
2912: my @contents = <$oldfh>; # Suck in the entire file.
2913:
2914: # write the backup file:
2915:
2916: my $newfh = IO::File->new("> $newfile");
2917: if(!(defined $newfh)){
2918: return 0;
2919: }
2920: my $lines = scalar @contents;
2921: for (my $i =0; $i < $lines; $i++) {
2922: print $newfh ($contents[$i]);
2923: }
2924:
2925: $oldfh->close;
2926: $newfh->close;
2927:
2928: chmod(0660, $newfile);
2929:
2930: return 1;
2931:
2932: } else {
2933: return 0;
2934: }
2935: }
1.157 foxr 2936: #
2937: # Host files are passed out with externally visible host IPs.
2938: # If, for example, we are behind a fire-wall or NAT host, our
2939: # internally visible IP may be different than the externally
2940: # visible IP. Therefore, we always adjust the contents of the
2941: # host file so that the entry for ME is the IP that we believe
2942: # we have. At present, this is defined as the entry that
2943: # DNS has for us. If by some chance we are not able to get a
2944: # DNS translation for us, then we assume that the host.tab file
2945: # is correct.
2946: # BUGBUGBUG - in the future, we really should see if we can
2947: # easily query the interface(s) instead.
2948: # Parameter(s):
2949: # contents - The contents of the host.tab to check.
2950: # Returns:
2951: # newcontents - The adjusted contents.
2952: #
2953: #
2954: sub AdjustHostContents {
2955: my $contents = shift;
2956: my $adjusted;
2957: my $me = $perlvar{'lonHostID'};
2958:
1.178.2.4 albertel 2959: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 2960: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
2961: chomp($line);
2962: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
2963: if ($id eq $me) {
1.178.2.4 albertel 2964: my $ip = gethostbyname($name);
2965: my $ipnew = inet_ntoa($ip);
2966: $ip = $ipnew;
1.157 foxr 2967: # Reconstruct the host line and append to adjusted:
2968:
1.178.2.4 albertel 2969: my $newline = "$id:$domain:$role:$name:$ip";
2970: if($maxcon ne "") { # Not all hosts have loncnew tuning params
2971: $newline .= ":$maxcon:$idleto:$mincon";
2972: }
2973: $adjusted .= $newline."\n";
1.157 foxr 2974:
1.178.2.4 albertel 2975: } else { # Not me, pass unmodified.
2976: $adjusted .= $line."\n";
2977: }
1.157 foxr 2978: } else { # Blank or comment never re-written.
2979: $adjusted .= $line."\n"; # Pass blanks and comments as is.
2980: }
1.178.2.4 albertel 2981: }
2982: return $adjusted;
1.157 foxr 2983: }
1.143 foxr 2984: #
2985: # InstallFile: Called to install an administrative file:
2986: # - The file is created with <name>.tmp
2987: # - The <name>.tmp file is then mv'd to <name>
2988: # This lugubrious procedure is done to ensure that we are never without
2989: # a valid, even if dated, version of the file regardless of who crashes
2990: # and when the crash occurs.
2991: #
2992: # Parameters:
2993: # Name of the file
2994: # File Contents.
2995: # Return:
2996: # nonzero - success.
2997: # 0 - failure and $! has an errno.
2998: #
2999: sub InstallFile {
3000: my $Filename = shift;
3001: my $Contents = shift;
3002: my $TempFile = $Filename.".tmp";
3003:
3004: # Open the file for write:
1.178.2.4 albertel 3005:
1.143 foxr 3006: my $fh = IO::File->new("> $TempFile"); # Write to temp.
3007: if(!(defined $fh)) {
3008: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
3009: return 0;
3010: }
3011: # write the contents of the file:
1.178.2.4 albertel 3012:
1.143 foxr 3013: print $fh ($Contents);
3014: $fh->close; # In case we ever have a filesystem w. locking
3015:
3016: chmod(0660, $TempFile);
3017:
3018: # Now we can move install the file in position.
3019:
3020: move($TempFile, $Filename);
3021:
3022: return 1;
3023: }
1.169 foxr 3024: #
3025: # ConfigFileFromSelector: converts a configuration file selector
3026: # (one of host or domain at this point) into a
3027: # configuration file pathname.
3028: #
3029: # Parameters:
3030: # selector - Configuration file selector.
3031: # Returns:
3032: # Full path to the file or undef if the selector is invalid.
3033: #
3034: sub ConfigFileFromSelector {
3035: my $selector = shift;
3036: my $tablefile;
3037:
3038: my $tabledir = $perlvar{'lonTabDir'}.'/';
3039: if ($selector eq "hosts") {
3040: $tablefile = $tabledir."hosts.tab";
3041: } elsif ($selector eq "domain") {
3042: $tablefile = $tabledir."domain.tab";
3043: } else {
3044: return undef;
3045: }
3046: return $tablefile;
1.143 foxr 3047:
1.169 foxr 3048: }
1.143 foxr 3049: #
1.141 foxr 3050: # PushFile: Called to do an administrative push of a file.
3051: # - Ensure the file being pushed is one we support.
3052: # - Backup the old file to <filename.saved>
3053: # - Separate the contents of the new file out from the
3054: # rest of the request.
3055: # - Write the new file.
3056: # Parameter:
3057: # Request - The entire user request. This consists of a : separated
3058: # string pushfile:tablename:contents.
3059: # NOTE: The contents may have :'s in it as well making things a bit
3060: # more interesting... but not much.
3061: # Returns:
3062: # String to send to client ("ok" or "refused" if bad file).
3063: #
3064: sub PushFile {
3065: my $request = shift;
3066: my ($command, $filename, $contents) = split(":", $request, 3);
3067:
3068: # At this point in time, pushes for only the following tables are
3069: # supported:
3070: # hosts.tab ($filename eq host).
3071: # domain.tab ($filename eq domain).
3072: # Construct the destination filename or reject the request.
3073: #
3074: # lonManage is supposed to ensure this, however this session could be
3075: # part of some elaborate spoof that managed somehow to authenticate.
3076: #
3077:
1.169 foxr 3078:
3079: my $tablefile = ConfigFileFromSelector($filename);
3080: if(! (defined $tablefile)) {
1.141 foxr 3081: return "refused";
3082: }
3083: #
3084: # >copy< the old table to the backup table
3085: # don't rename in case system crashes/reboots etc. in the time
3086: # window between a rename and write.
3087: #
3088: my $backupfile = $tablefile;
3089: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 3090: if(!CopyFile($tablefile, $backupfile)) {
3091: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
3092: return "error:$!";
3093: }
1.141 foxr 3094: &logthis('<font color="green"> Pushfile: backed up '
1.178.2.4 albertel 3095: .$tablefile." to $backupfile</font>");
1.141 foxr 3096:
1.157 foxr 3097: # If the file being pushed is the host file, we adjust the entry for ourself so that the
3098: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
3099: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
3100: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
3101: # that possibilty.
3102:
3103: if($filename eq "host") {
3104: $contents = AdjustHostContents($contents);
3105: }
3106:
1.141 foxr 3107: # Install the new file:
3108:
1.143 foxr 3109: if(!InstallFile($tablefile, $contents)) {
3110: &logthis('<font color="red"> Pushfile: unable to install '
1.178.2.4 albertel 3111: .$tablefile." $! </font>");
1.143 foxr 3112: return "error:$!";
1.178.2.4 albertel 3113: } else {
1.143 foxr 3114: &logthis('<font color="green"> Installed new '.$tablefile
3115: ."</font>");
1.178.2.4 albertel 3116:
1.143 foxr 3117: }
3118:
1.141 foxr 3119:
3120: # Indicate success:
3121:
3122: return "ok";
3123:
3124: }
1.145 foxr 3125:
3126: #
3127: # Called to re-init either lonc or lond.
3128: #
3129: # Parameters:
3130: # request - The full request by the client. This is of the form
3131: # reinit:<process>
3132: # where <process> is allowed to be either of
3133: # lonc or lond
3134: #
3135: # Returns:
3136: # The string to be sent back to the client either:
3137: # ok - Everything worked just fine.
3138: # error:why - There was a failure and why describes the reason.
3139: #
3140: #
3141: sub ReinitProcess {
3142: my $request = shift;
3143:
1.146 foxr 3144:
3145: # separate the request (reinit) from the process identifier and
3146: # validate it producing the name of the .pid file for the process.
3147: #
3148: #
3149: my ($junk, $process) = split(":", $request);
1.147 foxr 3150: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 3151: if($process eq 'lonc') {
3152: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 3153: if (!open(PIDFILE, "< $processpidfile")) {
3154: return "error:Open failed for $processpidfile";
3155: }
3156: my $loncpid = <PIDFILE>;
3157: close(PIDFILE);
3158: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
3159: ."</font>");
3160: kill("USR2", $loncpid);
1.146 foxr 3161: } elsif ($process eq 'lond') {
1.147 foxr 3162: logthis('<font color="red"> Reinitializing self (lond) </font>');
3163: &UpdateHosts; # Lond is us!!
1.146 foxr 3164: } else {
3165: &logthis('<font color="yellow" Invalid reinit request for '.$process
3166: ."</font>");
3167: return "error:Invalid process identifier $process";
3168: }
1.145 foxr 3169: return 'ok';
3170: }
1.168 foxr 3171: # Validate a line in a configuration file edit script:
3172: # Validation includes:
3173: # - Ensuring the command is valid.
3174: # - Ensuring the command has sufficient parameters
3175: # Parameters:
3176: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 3177: #
1.168 foxr 3178: # Return:
3179: # 0 - Invalid scriptline.
3180: # 1 - Valid scriptline
3181: # NOTE:
3182: # Only the command syntax is checked, not the executability of the
3183: # command.
3184: #
3185: sub isValidEditCommand {
3186: my $scriptline = shift;
3187:
3188: # Line elements are pipe separated:
3189:
3190: my ($command, $key, $newline) = split(/\|/, $scriptline);
3191: &logthis('<font color="green"> isValideditCommand checking: '.
3192: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
3193:
3194: if ($command eq "delete") {
3195: #
3196: # key with no newline.
3197: #
3198: if( ($key eq "") || ($newline ne "")) {
3199: return 0; # Must have key but no newline.
3200: } else {
3201: return 1; # Valid syntax.
3202: }
1.169 foxr 3203: } elsif ($command eq "replace") {
1.168 foxr 3204: #
3205: # key and newline:
3206: #
3207: if (($key eq "") || ($newline eq "")) {
3208: return 0;
3209: } else {
3210: return 1;
3211: }
1.169 foxr 3212: } elsif ($command eq "append") {
3213: if (($key ne "") && ($newline eq "")) {
3214: return 1;
3215: } else {
3216: return 0;
3217: }
1.168 foxr 3218: } else {
3219: return 0; # Invalid command.
3220: }
3221: return 0; # Should not get here!!!
3222: }
1.169 foxr 3223: #
3224: # ApplyEdit - Applies an edit command to a line in a configuration
3225: # file. It is the caller's responsiblity to validate the
3226: # edit line.
3227: # Parameters:
3228: # $directive - A single edit directive to apply.
3229: # Edit directives are of the form:
3230: # append|newline - Appends a new line to the file.
3231: # replace|key|newline - Replaces the line with key value 'key'
3232: # delete|key - Deletes the line with key value 'key'.
3233: # $editor - A config file editor object that contains the
3234: # file being edited.
3235: #
3236: sub ApplyEdit {
3237: my $directive = shift;
3238: my $editor = shift;
3239:
3240: # Break the directive down into its command and its parameters
3241: # (at most two at this point. The meaning of the parameters, if in fact
3242: # they exist depends on the command).
3243:
3244: my ($command, $p1, $p2) = split(/\|/, $directive);
3245:
3246: if($command eq "append") {
3247: $editor->Append($p1); # p1 - key p2 null.
3248: } elsif ($command eq "replace") {
3249: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
3250: } elsif ($command eq "delete") {
3251: $editor->DeleteLine($p1); # p1 - key p2 null.
3252: } else { # Should not get here!!!
1.178.2.4 albertel 3253: die "Invalid command given to ApplyEdit $command";
1.169 foxr 3254: }
3255: }
3256: #
3257: # AdjustOurHost:
3258: # Adjusts a host file stored in a configuration file editor object
3259: # for the true IP address of this host. This is necessary for hosts
3260: # that live behind a firewall.
3261: # Those hosts have a publicly distributed IP of the firewall, but
3262: # internally must use their actual IP. We assume that a given
3263: # host only has a single IP interface for now.
3264: # Formal Parameters:
3265: # editor - The configuration file editor to adjust. This
3266: # editor is assumed to contain a hosts.tab file.
3267: # Strategy:
3268: # - Figure out our hostname.
3269: # - Lookup the entry for this host.
3270: # - Modify the line to contain our IP
3271: # - Do a replace for this host.
3272: sub AdjustOurHost {
3273: my $editor = shift;
3274:
3275: # figure out who I am.
3276:
3277: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
3278:
3279: # Get my host file entry.
3280:
3281: my $ConfigLine = $editor->Find($myHostName);
3282: if(! (defined $ConfigLine)) {
3283: die "AdjustOurHost - no entry for me in hosts file $myHostName";
3284: }
3285: # figure out my IP:
3286: # Use the config line to get my hostname.
3287: # Use gethostbyname to translate that into an IP address.
3288: #
3289: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
3290: my $BinaryIp = gethostbyname($name);
3291: my $ip = inet_ntoa($ip);
3292: #
3293: # Reassemble the config line from the elements in the list.
3294: # Note that if the loncnew items were not present before, they will
3295: # be now even if they would be empty
3296: #
3297: my $newConfigLine = $id;
3298: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
3299: $newConfigLine .= ":".$item;
3300: }
3301: # Replace the line:
3302:
3303: $editor->ReplaceLine($id, $newConfigLine);
3304:
3305: }
3306: #
3307: # ReplaceConfigFile:
3308: # Replaces a configuration file with the contents of a
3309: # configuration file editor object.
3310: # This is done by:
3311: # - Copying the target file to <filename>.old
3312: # - Writing the new file to <filename>.tmp
3313: # - Moving <filename.tmp> -> <filename>
3314: # This laborious process ensures that the system is never without
3315: # a configuration file that's at least valid (even if the contents
3316: # may be dated).
3317: # Parameters:
3318: # filename - Name of the file to modify... this is a full path.
3319: # editor - Editor containing the file.
3320: #
3321: sub ReplaceConfigFile {
3322: my $filename = shift;
3323: my $editor = shift;
1.168 foxr 3324:
1.169 foxr 3325: CopyFile ($filename, $filename.".old");
3326:
3327: my $contents = $editor->Get(); # Get the contents of the file.
3328:
3329: InstallFile($filename, $contents);
3330: }
1.168 foxr 3331: #
3332: #
3333: # Called to edit a configuration table file
1.167 foxr 3334: # Parameters:
3335: # request - The entire command/request sent by lonc or lonManage
3336: # Return:
3337: # The reply to send to the client.
1.168 foxr 3338: #
1.167 foxr 3339: sub EditFile {
3340: my $request = shift;
3341:
3342: # Split the command into it's pieces: edit:filetype:script
3343:
1.168 foxr 3344: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 3345:
3346: # Check the pre-coditions for success:
3347:
3348: if($request != "edit") { # Something is amiss afoot alack.
3349: return "error:edit request detected, but request != 'edit'\n";
3350: }
3351: if( ($filetype ne "hosts") &&
3352: ($filetype ne "domain")) {
3353: return "error:edit requested with invalid file specifier: $filetype \n";
3354: }
3355:
3356: # Split the edit script and check it's validity.
1.168 foxr 3357:
3358: my @scriptlines = split(/\n/, $script); # one line per element.
3359: my $linecount = scalar(@scriptlines);
3360: for(my $i = 0; $i < $linecount; $i++) {
3361: chomp($scriptlines[$i]);
3362: if(!isValidEditCommand($scriptlines[$i])) {
3363: return "error:edit with bad script line: '$scriptlines[$i]' \n";
3364: }
3365: }
1.145 foxr 3366:
1.167 foxr 3367: # Execute the edit operation.
1.169 foxr 3368: # - Create a config file editor for the appropriate file and
3369: # - execute each command in the script:
3370: #
3371: my $configfile = ConfigFileFromSelector($filetype);
3372: if (!(defined $configfile)) {
3373: return "refused\n";
3374: }
3375: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 3376:
1.169 foxr 3377: for (my $i = 0; $i < $linecount; $i++) {
3378: ApplyEdit($scriptlines[$i], $editor);
3379: }
3380: # If the file is the host file, ensure that our host is
3381: # adjusted to have our ip:
3382: #
3383: if($filetype eq "host") {
3384: AdjustOurHost($editor);
3385: }
3386: # Finally replace the current file with our file.
3387: #
3388: ReplaceConfigFile($configfile, $editor);
1.167 foxr 3389:
3390: return "ok\n";
3391: }
1.141 foxr 3392: #
1.96 foxr 3393: # Convert an error return code from lcpasswd to a string value.
3394: #
3395: sub lcpasswdstrerror {
3396: my $ErrorCode = shift;
1.97 foxr 3397: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 3398: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3399: } else {
1.98 foxr 3400: return $passwderrors[$ErrorCode];
1.96 foxr 3401: }
3402: }
3403:
1.97 foxr 3404: #
3405: # Convert an error return code from lcuseradd to a string value:
3406: #
3407: sub lcuseraddstrerror {
3408: my $ErrorCode = shift;
3409: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3410: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3411: } else {
1.98 foxr 3412: return $adderrors[$ErrorCode];
1.97 foxr 3413: }
3414: }
3415:
1.23 harris41 3416: # grabs exception and records it to log before exiting
3417: sub catchexception {
1.27 albertel 3418: my ($error)=@_;
1.25 www 3419: $SIG{'QUIT'}='DEFAULT';
3420: $SIG{__DIE__}='DEFAULT';
1.165 albertel 3421: &status("Catching exception");
1.23 harris41 3422: &logthis("<font color=red>CRITICAL: "
1.178.2.4 albertel 3423: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
3424: ."a crash with this error msg->[$error]</font>");
1.57 www 3425: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 3426: if ($client) { print $client "error: $error\n"; }
1.59 www 3427: $server->close();
1.27 albertel 3428: die($error);
1.23 harris41 3429: }
3430:
1.63 www 3431: sub timeout {
1.165 albertel 3432: &status("Handling Timeout");
1.63 www 3433: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
3434: &catchexception('Timeout');
3435: }
1.22 harris41 3436: # -------------------------------- Set signal handlers to record abnormal exits
3437:
3438: $SIG{'QUIT'}=\&catchexception;
3439: $SIG{__DIE__}=\&catchexception;
3440:
1.81 matthew 3441: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 3442: &status("Read loncapa.conf and loncapa_apache.conf");
3443: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 3444: %perlvar=%{$perlvarref};
1.80 harris41 3445: undef $perlvarref;
1.19 www 3446:
1.35 harris41 3447: # ----------------------------- Make sure this process is running from user=www
3448: my $wwwid=getpwnam('www');
3449: if ($wwwid!=$<) {
1.178.2.4 albertel 3450: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3451: my $subj="LON: $currenthostid User ID mismatch";
3452: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 3453: mailto $emailto -s '$subj' > /dev/null");
1.178.2.4 albertel 3454: exit 1;
1.35 harris41 3455: }
3456:
1.19 www 3457: # --------------------------------------------- Check if other instance running
3458:
3459: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3460:
3461: if (-e $pidfile) {
1.178.2.4 albertel 3462: my $lfh=IO::File->new("$pidfile");
3463: my $pide=<$lfh>;
3464: chomp($pide);
3465: if (kill 0 => $pide) { die "already running"; }
1.19 www 3466: }
1.1 albertel 3467:
3468: # ------------------------------------------------------------- Read hosts file
3469:
3470:
3471:
3472: # establish SERVER socket, bind and listen.
3473: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3474: Type => SOCK_STREAM,
3475: Proto => 'tcp',
3476: Reuse => 1,
3477: Listen => 10 )
1.178.2.4 albertel 3478: or die "making socket: $@\n";
1.1 albertel 3479:
3480: # --------------------------------------------------------- Do global variables
3481:
3482: # global variables
3483:
1.134 albertel 3484: my %children = (); # keys are current child process IDs
1.178.2.1 foxr 3485: my $children = 0; # current number of children
1.1 albertel 3486:
3487: sub REAPER { # takes care of dead children
3488: $SIG{CHLD} = \&REAPER;
1.165 albertel 3489: &status("Handling child death");
1.178.2.1 foxr 3490: my $pid = wait;
3491: if (defined($children{$pid})) {
3492: &logthis("Child $pid died");
3493: $children --;
3494: delete $children{$pid};
3495: } else {
3496: &logthis("Unknown Child $pid died");
1.176 albertel 3497: }
1.165 albertel 3498: &status("Finished Handling child death");
1.1 albertel 3499: }
3500:
3501: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 3502: &status("Killing children (INT)");
1.1 albertel 3503: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3504: kill 'INT' => keys %children;
1.59 www 3505: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 3506: my $execdir=$perlvar{'lonDaemons'};
3507: unlink("$execdir/logs/lond.pid");
1.9 www 3508: &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.165 albertel 3509: &status("Done killing children");
1.1 albertel 3510: exit; # clean up with dignity
3511: }
3512:
3513: sub HUPSMAN { # signal handler for SIGHUP
3514: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 3515: &status("Killing children for restart (HUP)");
1.1 albertel 3516: kill 'INT' => keys %children;
1.59 www 3517: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9 www 3518: &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134 albertel 3519: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 3520: unlink("$execdir/logs/lond.pid");
1.165 albertel 3521: &status("Restarting self (HUP)");
1.1 albertel 3522: exec("$execdir/lond"); # here we go again
3523: }
3524:
1.144 foxr 3525: #
1.148 foxr 3526: # Kill off hashes that describe the host table prior to re-reading it.
3527: # Hashes affected are:
3528: # %hostid, %hostdom %hostip
3529: #
3530: sub KillHostHashes {
3531: foreach my $key (keys %hostid) {
3532: delete $hostid{$key};
3533: }
3534: foreach my $key (keys %hostdom) {
3535: delete $hostdom{$key};
3536: }
3537: foreach my $key (keys %hostip) {
3538: delete $hostip{$key};
3539: }
3540: }
3541: #
3542: # Read in the host table from file and distribute it into the various hashes:
3543: #
3544: # - %hostid - Indexed by IP, the loncapa hostname.
3545: # - %hostdom - Indexed by loncapa hostname, the domain.
3546: # - %hostip - Indexed by hostid, the Ip address of the host.
3547: sub ReadHostTable {
3548:
3549: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
3550:
3551: while (my $configline=<CONFIG>) {
1.178.2.1 foxr 3552: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3553: chomp($ip); $ip=~s/\D+$//;
3554: $hostid{$ip}=$id;
3555: $hostdom{$id}=$domain;
3556: $hostip{$id}=$ip;
3557: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
1.148 foxr 3558: }
3559: close(CONFIG);
3560: }
3561: #
3562: # Reload the Apache daemon's state.
1.150 foxr 3563: # This is done by invoking /home/httpd/perl/apachereload
3564: # a setuid perl script that can be root for us to do this job.
1.148 foxr 3565: #
3566: sub ReloadApache {
1.150 foxr 3567: my $execdir = $perlvar{'lonDaemons'};
3568: my $script = $execdir."/apachereload";
3569: system($script);
1.148 foxr 3570: }
3571:
3572: #
1.144 foxr 3573: # Called in response to a USR2 signal.
3574: # - Reread hosts.tab
3575: # - All children connected to hosts that were removed from hosts.tab
3576: # are killed via SIGINT
3577: # - All children connected to previously existing hosts are sent SIGUSR1
3578: # - Our internal hosts hash is updated to reflect the new contents of
3579: # hosts.tab causing connections from hosts added to hosts.tab to
3580: # now be honored.
3581: #
3582: sub UpdateHosts {
1.165 albertel 3583: &status("Reload hosts.tab");
1.147 foxr 3584: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 3585: #
3586: # The %children hash has the set of IP's we currently have children
3587: # on. These need to be matched against records in the hosts.tab
3588: # Any ip's no longer in the table get killed off they correspond to
3589: # either dropped or changed hosts. Note that the re-read of the table
3590: # will take care of new and changed hosts as connections come into being.
3591:
3592:
3593: KillHostHashes;
3594: ReadHostTable;
3595:
3596: foreach my $child (keys %children) {
3597: my $childip = $children{$child};
3598: if(!$hostid{$childip}) {
1.149 foxr 3599: logthis('<font color="blue"> UpdateHosts killing child '
3600: ." $child for ip $childip </font>");
1.148 foxr 3601: kill('INT', $child);
1.149 foxr 3602: } else {
3603: logthis('<font color="green"> keeping child for ip '
3604: ." $childip (pid=$child) </font>");
1.148 foxr 3605: }
3606: }
3607: ReloadApache;
1.165 albertel 3608: &status("Finished reloading hosts.tab");
1.144 foxr 3609: }
3610:
1.148 foxr 3611:
1.57 www 3612: sub checkchildren {
1.165 albertel 3613: &status("Checking on the children (sending signals)");
1.57 www 3614: &initnewstatus();
3615: &logstatus();
3616: &logthis('Going to check on the children');
1.134 albertel 3617: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 3618: foreach (sort keys %children) {
1.57 www 3619: sleep 1;
3620: unless (kill 'USR1' => $_) {
3621: &logthis ('Child '.$_.' is dead');
3622: &logstatus($$.' is dead');
3623: }
1.61 harris41 3624: }
1.63 www 3625: sleep 5;
1.113 albertel 3626: $SIG{ALRM} = sub { die "timeout" };
3627: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 3628: &status("Checking on the children (waiting for reports)");
1.63 www 3629: foreach (sort keys %children) {
3630: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.178.2.4 albertel 3631: eval {
3632: alarm(300);
3633: &logthis('Child '.$_.' did not respond');
3634: kill 9 => $_;
3635: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3636: #$subj="LON: $currenthostid killed lond process $_";
3637: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3638: #$execdir=$perlvar{'lonDaemons'};
3639: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3640: alarm(0);
3641: }
1.63 www 3642: }
3643: }
1.113 albertel 3644: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 3645: $SIG{__DIE__} = \&catchexception;
1.165 albertel 3646: &status("Finished checking children");
1.57 www 3647: }
3648:
1.1 albertel 3649: # --------------------------------------------------------------------- Logging
3650:
3651: sub logthis {
3652: my $message=shift;
3653: my $execdir=$perlvar{'lonDaemons'};
3654: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3655: my $now=time;
3656: my $local=localtime($now);
1.58 www 3657: $lastlog=$local.': '.$message;
1.1 albertel 3658: print $fh "$local ($$): $message\n";
3659: }
3660:
1.77 foxr 3661: # ------------------------- Conditional log if $DEBUG true.
3662: sub Debug {
3663: my $message = shift;
3664: if($DEBUG) {
3665: &logthis($message);
3666: }
3667: }
1.161 foxr 3668:
3669: #
3670: # Sub to do replies to client.. this gives a hook for some
3671: # debug tracing too:
3672: # Parameters:
3673: # fd - File open on client.
3674: # reply - Text to send to client.
3675: # request - Original request from client.
3676: #
1.178.2.1 foxr 3677: # Note: This increments Transactions
3678: #
1.161 foxr 3679: sub Reply {
1.178.2.1 foxr 3680: alarm(120);
1.161 foxr 3681: my $fd = shift;
3682: my $reply = shift;
3683: my $request = shift;
3684:
3685: print $fd $reply;
3686: Debug("Request was $request Reply was $reply");
3687:
1.178.2.1 foxr 3688: $Transactions++;
3689: alarm(0);
3690:
3691:
3692: }
3693: #
3694: # Sub to report a failure.
3695: # This function:
3696: # - Increments the failure statistic counters.
3697: # - Invokes Reply to send the error message to the client.
3698: # Parameters:
3699: # fd - File descriptor open on the client
3700: # reply - Reply text to emit.
3701: # request - The original request message (used by Reply
3702: # to debug if that's enabled.
3703: # Implicit outputs:
3704: # $Failures- The number of failures is incremented.
3705: # Reply (invoked here) sends a message to the
3706: # client:
3707: #
3708: sub Failure {
1.178.2.4 albertel 3709: my $fd = shift;
3710: my $reply = shift;
3711: my $request = shift;
1.178.2.1 foxr 3712:
1.178.2.4 albertel 3713: $Failures++;
3714: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 3715: }
1.57 www 3716: # ------------------------------------------------------------------ Log status
3717:
3718: sub logstatus {
1.178.2.4 albertel 3719: &status("Doing logging");
3720: my $docdir=$perlvar{'lonDocRoot'};
3721: {
3722: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
3723: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
3724: $fh->close();
3725: }
3726: &status("Finished londstatus.txt");
3727: {
3728: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3729: print $fh $status."\n".$lastlog."\n".time;
3730: $fh->close();
3731: }
3732: ResetStatistics;
3733: &status("Finished logging");
1.178.2.1 foxr 3734:
1.57 www 3735: }
3736:
3737: sub initnewstatus {
3738: my $docdir=$perlvar{'lonDocRoot'};
3739: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3740: my $now=time;
3741: my $local=localtime($now);
3742: print $fh "LOND status $local - parent $$\n\n";
1.64 www 3743: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 3744: while (my $filename=readdir(DIR)) {
1.64 www 3745: unlink("$docdir/lon-status/londchld/$filename");
3746: }
3747: closedir(DIR);
1.57 www 3748: }
3749:
3750: # -------------------------------------------------------------- Status setting
3751:
3752: sub status {
3753: my $what=shift;
3754: my $now=time;
3755: my $local=localtime($now);
1.178.2.1 foxr 3756: my $status = "lond: $what $local ";
3757: if($Transactions) {
1.178.2.4 albertel 3758: $status .= " Transactions: $Transactions Failed; $Failures";
1.178.2.1 foxr 3759: }
3760: $0=$status;
1.57 www 3761: }
1.11 www 3762:
3763: # -------------------------------------------------------- Escape Special Chars
3764:
3765: sub escape {
3766: my $str=shift;
3767: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3768: return $str;
3769: }
3770:
3771: # ----------------------------------------------------- Un-Escape Special Chars
3772:
3773: sub unescape {
3774: my $str=shift;
3775: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3776: return $str;
3777: }
3778:
1.1 albertel 3779: # ----------------------------------------------------------- Send USR1 to lonc
3780:
3781: sub reconlonc {
3782: my $peerfile=shift;
3783: &logthis("Trying to reconnect for $peerfile");
3784: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3785: if (my $fh=IO::File->new("$loncfile")) {
3786: my $loncpid=<$fh>;
3787: chomp($loncpid);
3788: if (kill 0 => $loncpid) {
3789: &logthis("lonc at pid $loncpid responding, sending USR1");
3790: kill USR1 => $loncpid;
3791: } else {
1.178.2.4 albertel 3792: &logthis("<font color=red>CRITICAL: "
3793: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 3794: }
3795: } else {
1.178.2.4 albertel 3796: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1 albertel 3797: }
3798: }
3799:
3800: # -------------------------------------------------- Non-critical communication
1.11 www 3801:
1.1 albertel 3802: sub subreply {
3803: my ($cmd,$server)=@_;
3804: my $peerfile="$perlvar{'lonSockDir'}/$server";
3805: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3806: Type => SOCK_STREAM,
3807: Timeout => 10)
1.178.2.4 albertel 3808: or return "con_lost";
1.1 albertel 3809: print $sclient "$cmd\n";
3810: my $answer=<$sclient>;
3811: chomp($answer);
3812: if (!$answer) { $answer="con_lost"; }
3813: return $answer;
3814: }
3815:
3816: sub reply {
1.178.2.4 albertel 3817: my ($cmd,$server)=@_;
3818: my $answer;
3819: if ($server ne $currenthostid) {
3820: $answer=subreply($cmd,$server);
3821: if ($answer eq 'con_lost') {
3822: $answer=subreply("ping",$server);
3823: if ($answer ne $server) {
3824: &logthis("sub reply: answer != server answer is $answer, server is $server");
3825: &reconlonc("$perlvar{'lonSockDir'}/$server");
3826: }
3827: $answer=subreply($cmd,$server);
3828: }
3829: } else {
3830: $answer='self_reply';
3831: }
3832: return $answer;
1.1 albertel 3833: }
3834:
1.13 www 3835: # -------------------------------------------------------------- Talk to lonsql
3836:
1.12 harris41 3837: sub sqlreply {
3838: my ($cmd)=@_;
3839: my $answer=subsqlreply($cmd);
3840: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3841: return $answer;
3842: }
3843:
3844: sub subsqlreply {
3845: my ($cmd)=@_;
3846: my $unixsock="mysqlsock";
3847: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3848: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3849: Type => SOCK_STREAM,
3850: Timeout => 10)
1.178.2.4 albertel 3851: or return "con_lost";
1.12 harris41 3852: print $sclient "$cmd\n";
3853: my $answer=<$sclient>;
3854: chomp($answer);
3855: if (!$answer) { $answer="con_lost"; }
3856: return $answer;
3857: }
3858:
1.1 albertel 3859: # -------------------------------------------- Return path to profile directory
1.11 www 3860:
1.1 albertel 3861: sub propath {
3862: my ($udom,$uname)=@_;
3863: $udom=~s/\W//g;
3864: $uname=~s/\W//g;
1.16 www 3865: my $subdir=$uname.'__';
1.1 albertel 3866: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3867: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3868: return $proname;
3869: }
3870:
3871: # --------------------------------------- Is this the home server of an author?
1.11 www 3872:
1.1 albertel 3873: sub ishome {
3874: my $author=shift;
3875: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3876: my ($udom,$uname)=split(/\//,$author);
3877: my $proname=propath($udom,$uname);
3878: if (-e $proname) {
3879: return 'owner';
3880: } else {
3881: return 'not_owner';
3882: }
3883: }
3884:
3885: # ======================================================= Continue main program
3886: # ---------------------------------------------------- Fork once and dissociate
3887:
1.134 albertel 3888: my $fpid=fork;
1.1 albertel 3889: exit if $fpid;
1.29 harris41 3890: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 3891:
1.29 harris41 3892: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 3893:
3894: # ------------------------------------------------------- Write our PID on disk
3895:
1.134 albertel 3896: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 3897: open (PIDSAVE,">$execdir/logs/lond.pid");
3898: print PIDSAVE "$$\n";
3899: close(PIDSAVE);
1.9 www 3900: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57 www 3901: &status('Starting');
1.1 albertel 3902:
1.106 foxr 3903:
1.1 albertel 3904:
3905: # ----------------------------------------------------- Install signal handlers
3906:
1.57 www 3907:
1.1 albertel 3908: $SIG{CHLD} = \&REAPER;
3909: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3910: $SIG{HUP} = \&HUPSMAN;
1.57 www 3911: $SIG{USR1} = \&checkchildren;
1.144 foxr 3912: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 3913:
1.148 foxr 3914: # Read the host hashes:
3915:
3916: ReadHostTable;
1.106 foxr 3917:
1.178.2.1 foxr 3918:
1.106 foxr 3919: # --------------------------------------------------------------
3920: # Accept connections. When a connection comes in, it is validated
3921: # and if good, a child process is created to process transactions
3922: # along the connection.
3923:
1.1 albertel 3924: while (1) {
1.165 albertel 3925: &status('Starting accept');
1.106 foxr 3926: $client = $server->accept() or next;
1.165 albertel 3927: &status('Accepted '.$client.' off to spawn');
1.106 foxr 3928: make_new_child($client);
1.165 albertel 3929: &status('Finished spawning');
1.1 albertel 3930: }
3931:
3932: sub make_new_child {
3933: my $pid;
3934: my $sigset;
1.106 foxr 3935:
3936: $client = shift;
1.165 albertel 3937: &status('Starting new child '.$client);
1.161 foxr 3938: &logthis('<font color="green"> Attempting to start child ('.$client.
3939: ")</font>");
1.1 albertel 3940: # block signal for fork
3941: $sigset = POSIX::SigSet->new(SIGINT);
3942: sigprocmask(SIG_BLOCK, $sigset)
1.29 harris41 3943: or die "Can't block SIGINT for fork: $!\n";
1.178.2.4 albertel 3944:
1.29 harris41 3945: die "fork: $!" unless defined ($pid = fork);
1.148 foxr 3946:
3947: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3948: # connection liveness.
3949:
3950: #
3951: # Figure out who we're talking to so we can record the peer in
3952: # the pid hash.
3953: #
3954: my $caller = getpeername($client);
3955: my ($port,$iaddr)=unpack_sockaddr_in($caller);
3956: $clientip=inet_ntoa($iaddr);
1.1 albertel 3957:
3958: if ($pid) {
3959: # Parent records the child's birth and returns.
3960: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 3961: or die "Can't unblock SIGINT for fork: $!\n";
1.148 foxr 3962: $children{$pid} = $clientip;
1.178.2.1 foxr 3963: $children++;
1.57 www 3964: &status('Started child '.$pid);
1.1 albertel 3965: return;
3966: } else {
3967: # Child can *not* return from this subroutine.
3968: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1.126 albertel 3969: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3970: #don't get intercepted
1.57 www 3971: $SIG{USR1}= \&logstatus;
1.63 www 3972: $SIG{ALRM}= \&timeout;
1.57 www 3973: $lastlog='Forked ';
3974: $status='Forked';
3975:
1.1 albertel 3976: # unblock signals
3977: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 3978: or die "Can't unblock SIGINT for fork: $!\n";
1.13 www 3979:
1.178.2.1 foxr 3980:
3981:
1.91 albertel 3982: &Authen::Krb5::init_context();
3983: &Authen::Krb5::init_ets();
1.178.2.4 albertel 3984:
1.161 foxr 3985: &status('Accepted connection');
1.1 albertel 3986: # =============================================================================
3987: # do something with the connection
3988: # -----------------------------------------------------------------------------
1.148 foxr 3989: # see if we know client and check for spoof IP by challenge
3990:
1.161 foxr 3991: ReadManagerTable; # May also be a manager!!
3992:
3993: my $clientrec=($hostid{$clientip} ne undef);
3994: my $ismanager=($managers{$clientip} ne undef);
3995: $clientname = "[unknonwn]";
3996: if($clientrec) { # Establish client type.
3997: $ConnectionType = "client";
3998: $clientname = $hostid{$clientip};
3999: if($ismanager) {
4000: $ConnectionType = "both";
4001: }
4002: } else {
4003: $ConnectionType = "manager";
4004: $clientname = $managers{$clientip};
4005: }
4006: my $clientok;
4007: if ($clientrec || $ismanager) {
4008: &status("Waiting for init from $clientip $clientname");
4009: &logthis('<font color="yellow">INFO: Connection, '.
4010: $clientip.
1.178.2.4 albertel 4011: " ($clientname) connection type = $ConnectionType </font>" );
1.161 foxr 4012: &status("Connecting $clientip ($clientname))");
4013: my $remotereq=<$client>;
4014: $remotereq=~s/[^\w:]//g;
4015: if ($remotereq =~ /^init/) {
4016: &sethost("sethost:$perlvar{'lonHostID'}");
4017: my $challenge="$$".time;
4018: print $client "$challenge\n";
1.178.2.4 albertel 4019: &status("Waiting for challenge reply from $clientip ($clientname)");
1.161 foxr 4020: $remotereq=<$client>;
4021: $remotereq=~s/\W//g;
4022: if ($challenge eq $remotereq) {
4023: $clientok=1;
4024: print $client "ok\n";
4025: } else {
1.178.2.4 albertel 4026: &logthis("<font color=blue>WARNING: $clientip did not reply challenge</font>");
1.161 foxr 4027: &status('No challenge reply '.$clientip);
4028: }
1.2 www 4029: } else {
1.178.2.4 albertel 4030: &logthis("<font color=blue>WARNING: "
1.161 foxr 4031: ."$clientip failed to initialize: >$remotereq< </font>");
4032: &status('No init '.$clientip);
4033: }
4034: } else {
1.178.2.4 albertel 4035: &logthis("<font color=blue>WARNING: Unknown client $clientip</font>");
1.161 foxr 4036: &status('Hung up on '.$clientip);
4037: }
4038: if ($clientok) {
1.1 albertel 4039: # ---------------- New known client connecting, could mean machine online again
1.161 foxr 4040:
4041: foreach my $id (keys(%hostip)) {
4042: if ($hostip{$id} ne $clientip ||
4043: $hostip{$currenthostid} eq $clientip) {
4044: # no need to try to do recon's to myself
4045: next;
1.115 albertel 4046: }
1.161 foxr 4047: &reconlonc("$perlvar{'lonSockDir'}/$id");
4048: }
4049: &logthis("<font color=green>Established connection: $clientname</font>");
4050: &status('Will listen to '.$clientname);
4051:
1.178.2.1 foxr 4052: ResetStatistics();
1.161 foxr 4053:
1.178.2.1 foxr 4054: # ------------------------------------------------------------ Process requests
4055: my $KeepGoing = 1;
4056: while ((my $userinput=GetRequest) && $KeepGoing) {
4057: $KeepGoing = ProcessRequest($userinput);
1.177 foxr 4058: # -------------------------------------------------------------------- complete
1.178.2.1 foxr 4059:
1.161 foxr 4060: &status('Listening to '.$clientname);
4061: }
1.59 www 4062: # --------------------------------------------- client unknown or fishy, refuse
1.161 foxr 4063: } else {
4064: print $client "refused\n";
4065: $client->close();
4066: &logthis("<font color=blue>WARNING: "
4067: ."Rejected client $clientip, closing connection</font>");
4068: }
4069: }
4070:
1.1 albertel 4071: # =============================================================================
1.161 foxr 4072:
4073: &logthis("<font color=red>CRITICAL: "
4074: ."Disconnect from $clientip ($clientname)</font>");
4075:
4076:
4077: # this exit is VERY important, otherwise the child will become
4078: # a producer of more and more children, forking yourself into
4079: # process death.
4080: exit;
1.106 foxr 4081:
1.78 foxr 4082: }
4083:
4084:
4085: #
4086: # Checks to see if the input roleput request was to set
4087: # an author role. If so, invokes the lchtmldir script to set
4088: # up a correct public_html
4089: # Parameters:
4090: # request - The request sent to the rolesput subchunk.
4091: # We're looking for /domain/_au
4092: # domain - The domain in which the user is having roles doctored.
4093: # user - Name of the user for which the role is being put.
4094: # authtype - The authentication type associated with the user.
4095: #
1.178.2.4 albertel 4096: sub ManagePermissions {
1.78 foxr 4097: my $request = shift;
4098: my $domain = shift;
4099: my $user = shift;
4100: my $authtype= shift;
4101:
4102: # See if the request is of the form /$domain/_au
1.178.2.1 foxr 4103: &logthis("ruequest is $request");
1.78 foxr 4104: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4105: my $execdir = $perlvar{'lonDaemons'};
4106: my $userhome= "/home/$user" ;
1.134 albertel 4107: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 4108: system("$execdir/lchtmldir $userhome $user $authtype");
4109: }
4110: }
4111: #
4112: # GetAuthType - Determines the authorization type of a user in a domain.
4113:
4114: # Returns the authorization type or nouser if there is no such user.
4115: #
1.178.2.4 albertel 4116: sub GetAuthType {
1.78 foxr 4117: my $domain = shift;
4118: my $user = shift;
4119:
1.79 foxr 4120: Debug("GetAuthType( $domain, $user ) \n");
1.78 foxr 4121: my $proname = &propath($domain, $user);
4122: my $passwdfile = "$proname/passwd";
4123: if( -e $passwdfile ) {
4124: my $pf = IO::File->new($passwdfile);
4125: my $realpassword = <$pf>;
4126: chomp($realpassword);
1.79 foxr 4127: Debug("Password info = $realpassword\n");
1.78 foxr 4128: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 4129: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 4130: my $availinfo = '';
1.91 albertel 4131: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 4132: $availinfo = $contentpwd;
4133: }
1.79 foxr 4134:
1.78 foxr 4135: return "$authtype:$availinfo";
1.178.2.4 albertel 4136: } else {
1.79 foxr 4137: Debug("Returning nouser");
1.78 foxr 4138: return "nouser";
4139: }
1.1 albertel 4140: }
4141:
1.84 albertel 4142: sub addline {
4143: my ($fname,$hostid,$ip,$newline)=@_;
4144: my $contents;
4145: my $found=0;
4146: my $expr='^'.$hostid.':'.$ip.':';
4147: $expr =~ s/\./\\\./g;
1.134 albertel 4148: my $sh;
1.84 albertel 4149: if ($sh=IO::File->new("$fname.subscription")) {
4150: while (my $subline=<$sh>) {
4151: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
4152: }
4153: $sh->close();
4154: }
4155: $sh=IO::File->new(">$fname.subscription");
4156: if ($contents) { print $sh $contents; }
4157: if ($newline) { print $sh $newline; }
4158: $sh->close();
4159: return $found;
1.86 www 4160: }
4161:
4162: sub getchat {
1.122 www 4163: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 4164: my %hash;
4165: my $proname=&propath($cdom,$cname);
4166: my @entries=();
1.88 albertel 4167: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4168: &GDBM_READER(),0640)) {
4169: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4170: untie %hash;
1.123 www 4171: }
1.124 www 4172: my @participants=();
1.134 albertel 4173: my $cutoff=time-60;
1.123 www 4174: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 4175: &GDBM_WRCREAT(),0640)) {
4176: $hash{$uname.':'.$udom}=time;
1.123 www 4177: foreach (sort keys %hash) {
4178: if ($hash{$_}>$cutoff) {
1.124 www 4179: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 4180: }
4181: }
4182: untie %hash;
1.86 www 4183: }
1.124 www 4184: return (@participants,@entries);
1.86 www 4185: }
4186:
4187: sub chatadd {
1.88 albertel 4188: my ($cdom,$cname,$newchat)=@_;
4189: my %hash;
4190: my $proname=&propath($cdom,$cname);
4191: my @entries=();
1.142 www 4192: my $time=time;
1.88 albertel 4193: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4194: &GDBM_WRCREAT(),0640)) {
4195: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4196: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
4197: my ($thentime,$idnum)=split(/\_/,$lastid);
4198: my $newid=$time.'_000000';
4199: if ($thentime==$time) {
4200: $idnum=~s/^0+//;
4201: $idnum++;
4202: $idnum=substr('000000'.$idnum,-6,6);
4203: $newid=$time.'_'.$idnum;
4204: }
4205: $hash{$newid}=$newchat;
4206: my $expired=$time-3600;
4207: foreach (keys %hash) {
4208: my ($thistime)=($_=~/(\d+)\_/);
4209: if ($thistime<$expired) {
1.89 www 4210: delete $hash{$_};
1.88 albertel 4211: }
4212: }
4213: untie %hash;
1.142 www 4214: }
4215: {
4216: my $hfh;
4217: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
4218: print $hfh "$time:".&unescape($newchat)."\n";
4219: }
1.86 www 4220: }
1.84 albertel 4221: }
4222:
4223: sub unsub {
4224: my ($fname,$clientip)=@_;
4225: my $result;
1.161 foxr 4226: if (unlink("$fname.$clientname")) {
1.84 albertel 4227: $result="ok\n";
4228: } else {
4229: $result="not_subscribed\n";
4230: }
4231: if (-e "$fname.subscription") {
1.161 foxr 4232: my $found=&addline($fname,$clientname,$clientip,'');
1.84 albertel 4233: if ($found) { $result="ok\n"; }
4234: } else {
4235: if ($result != "ok\n") { $result="not_subscribed\n"; }
4236: }
4237: return $result;
4238: }
4239:
1.101 www 4240: sub currentversion {
4241: my $fname=shift;
4242: my $version=-1;
4243: my $ulsdir='';
4244: if ($fname=~/^(.+)\/[^\/]+$/) {
1.178.2.4 albertel 4245: $ulsdir=$1;
1.101 www 4246: }
1.114 albertel 4247: my ($fnamere1,$fnamere2);
4248: # remove version if already specified
1.101 www 4249: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 4250: # get the bits that go before and after the version number
4251: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4252: $fnamere1=$1;
4253: $fnamere2='.'.$2;
4254: }
1.101 www 4255: if (-e $fname) { $version=1; }
4256: if (-e $ulsdir) {
1.134 albertel 4257: if(-d $ulsdir) {
4258: if (opendir(LSDIR,$ulsdir)) {
4259: my $ulsfn;
4260: while ($ulsfn=readdir(LSDIR)) {
1.101 www 4261: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 4262: my $thisfile=$ulsdir.'/'.$ulsfn;
4263: unless (-l $thisfile) {
1.160 www 4264: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 4265: if ($1>$version) { $version=$1; }
4266: }
4267: }
4268: }
4269: closedir(LSDIR);
4270: $version++;
4271: }
4272: }
4273: }
4274: return $version;
1.101 www 4275: }
4276:
4277: sub thisversion {
4278: my $fname=shift;
4279: my $version=-1;
4280: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4281: $version=$1;
4282: }
4283: return $version;
4284: }
4285:
1.84 albertel 4286: sub subscribe {
4287: my ($userinput,$clientip)=@_;
4288: my $result;
4289: my ($cmd,$fname)=split(/:/,$userinput);
4290: my $ownership=&ishome($fname);
4291: if ($ownership eq 'owner') {
1.101 www 4292: # explitly asking for the current version?
4293: unless (-e $fname) {
4294: my $currentversion=¤tversion($fname);
4295: if (&thisversion($fname)==$currentversion) {
4296: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4297: my $root=$1;
4298: my $extension=$2;
4299: symlink($root.'.'.$extension,
4300: $root.'.'.$currentversion.'.'.$extension);
1.102 www 4301: unless ($extension=~/\.meta$/) {
1.178.2.4 albertel 4302: symlink($root.'.'.$extension.'.meta',
4303: $root.'.'.$currentversion.'.'.$extension.'.meta');
1.102 www 4304: }
1.101 www 4305: }
4306: }
4307: }
1.84 albertel 4308: if (-e $fname) {
4309: if (-d $fname) {
4310: $result="directory\n";
4311: } else {
1.161 foxr 4312: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 4313: my $now=time;
1.161 foxr 4314: my $found=&addline($fname,$clientname,$clientip,
4315: "$clientname:$clientip:$now\n");
1.84 albertel 4316: if ($found) { $result="$fname\n"; }
4317: # if they were subscribed to only meta data, delete that
4318: # subscription, when you subscribe to a file you also get
4319: # the metadata
4320: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4321: $fname=~s/\/home\/httpd\/html\/res/raw/;
4322: $fname="http://$thisserver/".$fname;
4323: $result="$fname\n";
4324: }
4325: } else {
4326: $result="not_found\n";
4327: }
4328: } else {
4329: $result="rejected\n";
4330: }
4331: return $result;
4332: }
1.91 albertel 4333:
4334: sub make_passwd_file {
1.98 foxr 4335: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 4336: my $result="ok\n";
4337: if ($umode eq 'krb4' or $umode eq 'krb5') {
4338: {
4339: my $pf = IO::File->new(">$passfilename");
4340: print $pf "$umode:$npass\n";
4341: }
4342: } elsif ($umode eq 'internal') {
4343: my $salt=time;
4344: $salt=substr($salt,6,2);
4345: my $ncpass=crypt($npass,$salt);
4346: {
4347: &Debug("Creating internal auth");
4348: my $pf = IO::File->new(">$passfilename");
4349: print $pf "internal:$ncpass\n";
4350: }
4351: } elsif ($umode eq 'localauth') {
4352: {
4353: my $pf = IO::File->new(">$passfilename");
4354: print $pf "localauth:$npass\n";
4355: }
4356: } elsif ($umode eq 'unix') {
4357: {
4358: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4359: {
4360: &Debug("Executing external: ".$execpath);
1.98 foxr 4361: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 4362: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 4363: print $se "$uname\n";
4364: print $se "$npass\n";
4365: print $se "$npass\n";
1.97 foxr 4366: }
4367: my $useraddok = $?;
4368: if($useraddok > 0) {
4369: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91 albertel 4370: }
4371: my $pf = IO::File->new(">$passfilename");
4372: print $pf "unix:\n";
4373: }
4374: } elsif ($umode eq 'none') {
4375: {
4376: my $pf = IO::File->new(">$passfilename");
4377: print $pf "none:\n";
4378: }
4379: } else {
4380: $result="auth_mode_error\n";
4381: }
4382: return $result;
1.121 albertel 4383: }
4384:
4385: sub sethost {
4386: my ($remotereq) = @_;
4387: my (undef,$hostid)=split(/:/,$remotereq);
4388: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4389: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
4390: $currenthostid=$hostid;
4391: $currentdomainid=$hostdom{$hostid};
4392: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4393: } else {
4394: &logthis("Requested host id $hostid not an alias of ".
4395: $perlvar{'lonHostID'}." refusing connection");
4396: return 'unable_to_set';
4397: }
4398: return 'ok';
4399: }
4400:
4401: sub version {
4402: my ($userinput)=@_;
4403: $remoteVERSION=(split(/:/,$userinput))[1];
4404: return "version:$VERSION";
1.127 albertel 4405: }
1.178.2.1 foxr 4406: ############## >>>>>>>>>>>>>>>>>>>>>>>>>> FUTUREWORK <<<<<<<<<<<<<<<<<<<<<<<<<<<<
1.128 albertel 4407: #There is a copy of this in lonnet.pm
1.178.2.1 foxr 4408: # Can we hoist these lil' things out into common places?
4409: #
1.127 albertel 4410: sub userload {
4411: my $numusers=0;
4412: {
4413: opendir(LONIDS,$perlvar{'lonIDsDir'});
4414: my $filename;
4415: my $curtime=time;
4416: while ($filename=readdir(LONIDS)) {
4417: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 4418: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 4419: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 4420: }
4421: closedir(LONIDS);
4422: }
4423: my $userloadpercent=0;
4424: my $maxuserload=$perlvar{'lonUserLoadLim'};
4425: if ($maxuserload) {
1.129 albertel 4426: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 4427: }
1.130 albertel 4428: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 4429: return $userloadpercent;
1.91 albertel 4430: }
4431:
1.61 harris41 4432: # ----------------------------------- POD (plain old documentation, CPAN style)
4433:
4434: =head1 NAME
4435:
4436: lond - "LON Daemon" Server (port "LOND" 5663)
4437:
4438: =head1 SYNOPSIS
4439:
1.74 harris41 4440: Usage: B<lond>
4441:
4442: Should only be run as user=www. This is a command-line script which
4443: is invoked by B<loncron>. There is no expectation that a typical user
4444: will manually start B<lond> from the command-line. (In other words,
4445: DO NOT START B<lond> YOURSELF.)
1.61 harris41 4446:
4447: =head1 DESCRIPTION
4448:
1.74 harris41 4449: There are two characteristics associated with the running of B<lond>,
4450: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4451: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4452: subscriptions, etc). These are described in two large
4453: sections below.
4454:
4455: B<PROCESS MANAGEMENT>
4456:
1.61 harris41 4457: Preforker - server who forks first. Runs as a daemon. HUPs.
4458: Uses IDEA encryption
4459:
1.74 harris41 4460: B<lond> forks off children processes that correspond to the other servers
4461: in the network. Management of these processes can be done at the
4462: parent process level or the child process level.
4463:
4464: B<logs/lond.log> is the location of log messages.
4465:
4466: The process management is now explained in terms of linux shell commands,
4467: subroutines internal to this code, and signal assignments:
4468:
4469: =over 4
4470:
4471: =item *
4472:
4473: PID is stored in B<logs/lond.pid>
4474:
4475: This is the process id number of the parent B<lond> process.
4476:
4477: =item *
4478:
4479: SIGTERM and SIGINT
4480:
4481: Parent signal assignment:
4482: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4483:
4484: Child signal assignment:
4485: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4486: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4487: to restart a new child.)
4488:
4489: Command-line invocations:
4490: B<kill> B<-s> SIGTERM I<PID>
4491: B<kill> B<-s> SIGINT I<PID>
4492:
4493: Subroutine B<HUNTSMAN>:
4494: This is only invoked for the B<lond> parent I<PID>.
4495: This kills all the children, and then the parent.
4496: The B<lonc.pid> file is cleared.
4497:
4498: =item *
4499:
4500: SIGHUP
4501:
4502: Current bug:
4503: This signal can only be processed the first time
4504: on the parent process. Subsequent SIGHUP signals
4505: have no effect.
4506:
4507: Parent signal assignment:
4508: $SIG{HUP} = \&HUPSMAN;
4509:
4510: Child signal assignment:
4511: none (nothing happens)
4512:
4513: Command-line invocations:
4514: B<kill> B<-s> SIGHUP I<PID>
4515:
4516: Subroutine B<HUPSMAN>:
4517: This is only invoked for the B<lond> parent I<PID>,
4518: This kills all the children, and then the parent.
4519: The B<lond.pid> file is cleared.
4520:
4521: =item *
4522:
4523: SIGUSR1
4524:
4525: Parent signal assignment:
4526: $SIG{USR1} = \&USRMAN;
4527:
4528: Child signal assignment:
4529: $SIG{USR1}= \&logstatus;
4530:
4531: Command-line invocations:
4532: B<kill> B<-s> SIGUSR1 I<PID>
4533:
4534: Subroutine B<USRMAN>:
4535: When invoked for the B<lond> parent I<PID>,
4536: SIGUSR1 is sent to all the children, and the status of
4537: each connection is logged.
1.144 foxr 4538:
4539: =item *
4540:
4541: SIGUSR2
4542:
4543: Parent Signal assignment:
4544: $SIG{USR2} = \&UpdateHosts
4545:
4546: Child signal assignment:
4547: NONE
4548:
1.74 harris41 4549:
4550: =item *
4551:
4552: SIGCHLD
4553:
4554: Parent signal assignment:
4555: $SIG{CHLD} = \&REAPER;
4556:
4557: Child signal assignment:
4558: none
4559:
4560: Command-line invocations:
4561: B<kill> B<-s> SIGCHLD I<PID>
4562:
4563: Subroutine B<REAPER>:
4564: This is only invoked for the B<lond> parent I<PID>.
4565: Information pertaining to the child is removed.
4566: The socket port is cleaned up.
4567:
4568: =back
4569:
4570: B<SERVER-SIDE ACTIVITIES>
4571:
4572: Server-side information can be accepted in an encrypted or non-encrypted
4573: method.
4574:
4575: =over 4
4576:
4577: =item ping
4578:
4579: Query a client in the hosts.tab table; "Are you there?"
4580:
4581: =item pong
4582:
4583: Respond to a ping query.
4584:
4585: =item ekey
4586:
4587: Read in encrypted key, make cipher. Respond with a buildkey.
4588:
4589: =item load
4590:
4591: Respond with CPU load based on a computation upon /proc/loadavg.
4592:
4593: =item currentauth
4594:
4595: Reply with current authentication information (only over an
4596: encrypted channel).
4597:
4598: =item auth
4599:
4600: Only over an encrypted channel, reply as to whether a user's
4601: authentication information can be validated.
4602:
4603: =item passwd
4604:
4605: Allow for a password to be set.
4606:
4607: =item makeuser
4608:
4609: Make a user.
4610:
4611: =item passwd
4612:
4613: Allow for authentication mechanism and password to be changed.
4614:
4615: =item home
1.61 harris41 4616:
1.74 harris41 4617: Respond to a question "are you the home for a given user?"
4618:
4619: =item update
4620:
4621: Update contents of a subscribed resource.
4622:
4623: =item unsubscribe
4624:
4625: The server is unsubscribing from a resource.
4626:
4627: =item subscribe
4628:
4629: The server is subscribing to a resource.
4630:
4631: =item log
4632:
4633: Place in B<logs/lond.log>
4634:
4635: =item put
4636:
4637: stores hash in namespace
4638:
4639: =item rolesput
4640:
4641: put a role into a user's environment
4642:
4643: =item get
4644:
4645: returns hash with keys from array
4646: reference filled in from namespace
4647:
4648: =item eget
4649:
4650: returns hash with keys from array
4651: reference filled in from namesp (encrypts the return communication)
4652:
4653: =item rolesget
4654:
4655: get a role from a user's environment
4656:
4657: =item del
4658:
4659: deletes keys out of array from namespace
4660:
4661: =item keys
4662:
4663: returns namespace keys
4664:
4665: =item dump
4666:
4667: dumps the complete (or key matching regexp) namespace into a hash
4668:
4669: =item store
4670:
4671: stores hash permanently
4672: for this url; hashref needs to be given and should be a \%hashname; the
4673: remaining args aren't required and if they aren't passed or are '' they will
4674: be derived from the ENV
4675:
4676: =item restore
4677:
4678: returns a hash for a given url
4679:
4680: =item querysend
4681:
4682: Tells client about the lonsql process that has been launched in response
4683: to a sent query.
4684:
4685: =item queryreply
4686:
4687: Accept information from lonsql and make appropriate storage in temporary
4688: file space.
4689:
4690: =item idput
4691:
4692: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4693: for each student, defined perhaps by the institutional Registrar.)
4694:
4695: =item idget
4696:
4697: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4698: for each student, defined perhaps by the institutional Registrar.)
4699:
4700: =item tmpput
4701:
4702: Accept and store information in temporary space.
4703:
4704: =item tmpget
4705:
4706: Send along temporarily stored information.
4707:
4708: =item ls
4709:
4710: List part of a user's directory.
4711:
1.135 foxr 4712: =item pushtable
4713:
4714: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4715: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4716: must be restored manually in case of a problem with the new table file.
4717: pushtable requires that the request be encrypted and validated via
4718: ValidateManager. The form of the command is:
4719: enc:pushtable tablename <tablecontents> \n
4720: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4721: cleartext newline.
4722:
1.74 harris41 4723: =item Hanging up (exit or init)
4724:
4725: What to do when a client tells the server that they (the client)
4726: are leaving the network.
4727:
4728: =item unknown command
4729:
4730: If B<lond> is sent an unknown command (not in the list above),
4731: it replys to the client "unknown_cmd".
1.135 foxr 4732:
1.74 harris41 4733:
4734: =item UNKNOWN CLIENT
4735:
4736: If the anti-spoofing algorithm cannot verify the client,
4737: the client is rejected (with a "refused" message sent
4738: to the client, and the connection is closed.
4739:
4740: =back
1.61 harris41 4741:
4742: =head1 PREREQUISITES
4743:
4744: IO::Socket
4745: IO::File
4746: Apache::File
4747: Symbol
4748: POSIX
4749: Crypt::IDEA
4750: LWP::UserAgent()
4751: GDBM_File
4752: Authen::Krb4
1.91 albertel 4753: Authen::Krb5
1.61 harris41 4754:
4755: =head1 COREQUISITES
4756:
4757: =head1 OSNAMES
4758:
4759: linux
4760:
4761: =head1 SCRIPT CATEGORIES
4762:
4763: Server/Process
4764:
4765: =cut
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