1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.145 2003/09/16 10:13:20 foxr Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
33: # 03/07,05/31 Gerd Kortemeyer
34: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
35: # 12/05,12/13,12/29 Gerd Kortemeyer
36: # YEAR=2001
37: # 02/12 Gerd Kortemeyer
38: # 03/24 Gerd Kortemeyer
39: # 05/11,05/28,08/30 Gerd Kortemeyer
40: # 11/26,11/27 Gerd Kortemeyer
41: # 12/22 Gerd Kortemeyer
42: # YEAR=2002
43: # 01/20/02,02/05 Gerd Kortemeyer
44: # 02/05 Guy Albertelli
45: # 02/12 Gerd Kortemeyer
46: # 02/19 Matthew Hall
47: # 02/25 Gerd Kortemeyer
48: # 01/xx/2003 Ron Fox.. Remove preforking. This makes the general daemon
49: # logic simpler (and there were problems maintaining the preforked
50: # population). Since the time averaged connection rate is close to zero
51: # because lonc's purpose is to maintain near continuous connnections,
52: # preforking is not really needed.
53: # 08/xx/2003 Ron Fox: Add management requests. Management requests
54: # will be validated via a call to ValidateManager. At present, this
55: # is done by simple host verification. In the future we can modify
56: # this function to do a certificate check.
57: # Management functions supported include:
58: # - pushing /home/httpd/lonTabs/hosts.tab
59: # - pushing /home/httpd/lonTabs/domain.tab
60: # 09/08/2003 Ron Fox: Told lond to take care of change logging so we
61: # don't have to remember it:
62: # $Log: lond,v $
63: # Revision 1.145 2003/09/16 10:13:20 foxr
64: # Added ReinitProcess function to oversee the parsing and processing of the
65: # reinit:<process> client request.
66: #
67: # Revision 1.144 2003/09/16 09:47:01 foxr
68: # Added skeletal support for SIGUSR2 (update hosts.tab)
69: #
70: # Revision 1.143 2003/09/15 10:03:52 foxr
71: # Completed and tested code for pushfile.
72: #
73: # Revision 1.142 2003/09/09 20:47:46 www
74: # Permanently store chatroom entries in chatroom.log
75: #
76: # Revision 1.141 2003/09/08 10:32:07 foxr
77: # Added PushFile sub This sub oversees the push of a new configuration table file
78: # Currently supported files are:
79: # - hosts.tab (transaction pushfile:hosts:contents)
80: # - domain.tab (transaction pushfile:domain:contents)
81: #
82:
83:
84: use strict;
85: use lib '/home/httpd/lib/perl/';
86: use LONCAPA::Configuration;
87:
88: use IO::Socket;
89: use IO::File;
90: #use Apache::File;
91: use Symbol;
92: use POSIX;
93: use Crypt::IDEA;
94: use LWP::UserAgent();
95: use GDBM_File;
96: use Authen::Krb4;
97: use Authen::Krb5;
98: use lib '/home/httpd/lib/perl/';
99: use localauth;
100: use File::Copy;
101:
102: my $DEBUG = 0; # Non zero to enable debug log entries.
103:
104: my $status='';
105: my $lastlog='';
106:
107: my $VERSION='$Revision: 1.145 $'; #' stupid emacs
108: my $remoteVERSION;
109: my $currenthostid;
110: my $currentdomainid;
111:
112: my $client;
113: my $clientip;
114:
115: my $server;
116: my $thisserver;
117:
118: my %hostid;
119: my %hostdom;
120: my %hostip;
121: my %perlvar; # Will have the apache conf defined perl vars.
122:
123: #
124: # The array below are password error strings."
125: #
126: my $lastpwderror = 13; # Largest error number from lcpasswd.
127: my @passwderrors = ("ok",
128: "lcpasswd must be run as user 'www'",
129: "lcpasswd got incorrect number of arguments",
130: "lcpasswd did not get the right nubmer of input text lines",
131: "lcpasswd too many simultaneous pwd changes in progress",
132: "lcpasswd User does not exist.",
133: "lcpasswd Incorrect current passwd",
134: "lcpasswd Unable to su to root.",
135: "lcpasswd Cannot set new passwd.",
136: "lcpasswd Username has invalid characters",
137: "lcpasswd Invalid characters in password",
138: "11", "12",
139: "lcpasswd Password mismatch");
140:
141:
142: # The array below are lcuseradd error strings.:
143:
144: my $lastadderror = 13;
145: my @adderrors = ("ok",
146: "User ID mismatch, lcuseradd must run as user www",
147: "lcuseradd Incorrect number of command line parameters must be 3",
148: "lcuseradd Incorrect number of stdinput lines, must be 3",
149: "lcuseradd Too many other simultaneous pwd changes in progress",
150: "lcuseradd User does not exist",
151: "lcuseradd Unabel to mak ewww member of users's group",
152: "lcuseradd Unable to su to root",
153: "lcuseradd Unable to set password",
154: "lcuseradd Usrname has invbalid charcters",
155: "lcuseradd Password has an invalid character",
156: "lcuseradd User already exists",
157: "lcuseradd Could not add user.",
158: "lcuseradd Password mismatch");
159:
160:
161: #
162: # GetCertificate: Given a transaction that requires a certificate,
163: # this function will extract the certificate from the transaction
164: # request. Note that at this point, the only concept of a certificate
165: # is the hostname to which we are connected.
166: #
167: # Parameter:
168: # request - The request sent by our client (this parameterization may
169: # need to change when we really use a certificate granting
170: # authority.
171: #
172: sub GetCertificate {
173: my $request = shift;
174:
175: return $clientip;
176: }
177:
178:
179: #
180: # ValidManager: Determines if a given certificate represents a valid manager.
181: # in this primitive implementation, the 'certificate' is
182: # just the connecting loncapa client name. This is checked
183: # against a valid client list in the configuration.
184: #
185: #
186: sub ValidManager {
187: my $certificate = shift;
188:
189: my $hostentry = $hostid{$certificate};
190: if ($hostentry ne undef) {
191: &logthis('<font color="yellow">Authenticating manager'.
192: " $hostentry</font>");
193: return 1;
194: } else {
195: &logthis('<font color="red"> Failed manager authentication '.
196: "$certificate </font>");
197: }
198: }
199: #
200: # CopyFile: Called as part of the process of installing a
201: # new configuration file. This function copies an existing
202: # file to a backup file.
203: # Parameters:
204: # oldfile - Name of the file to backup.
205: # newfile - Name of the backup file.
206: # Return:
207: # 0 - Failure (errno has failure reason).
208: # 1 - Success.
209: #
210: sub CopyFile {
211: my $oldfile = shift;
212: my $newfile = shift;
213:
214: # The file must exist:
215:
216: if(-e $oldfile) {
217:
218: # Read the old file.
219:
220: my $oldfh = IO::File->new("< $oldfile");
221: if(!$oldfh) {
222: return 0;
223: }
224: my @contents = <$oldfh>; # Suck in the entire file.
225:
226: # write the backup file:
227:
228: my $newfh = IO::File->new("> $newfile");
229: if(!(defined $newfh)){
230: return 0;
231: }
232: my $lines = scalar @contents;
233: for (my $i =0; $i < $lines; $i++) {
234: print $newfh ($contents[$i]);
235: }
236:
237: $oldfh->close;
238: $newfh->close;
239:
240: chmod(0660, $newfile);
241:
242: return 1;
243:
244: } else {
245: return 0;
246: }
247: }
248:
249: #
250: # InstallFile: Called to install an administrative file:
251: # - The file is created with <name>.tmp
252: # - The <name>.tmp file is then mv'd to <name>
253: # This lugubrious procedure is done to ensure that we are never without
254: # a valid, even if dated, version of the file regardless of who crashes
255: # and when the crash occurs.
256: #
257: # Parameters:
258: # Name of the file
259: # File Contents.
260: # Return:
261: # nonzero - success.
262: # 0 - failure and $! has an errno.
263: #
264: sub InstallFile {
265: my $Filename = shift;
266: my $Contents = shift;
267: my $TempFile = $Filename.".tmp";
268:
269: # Open the file for write:
270:
271: my $fh = IO::File->new("> $TempFile"); # Write to temp.
272: if(!(defined $fh)) {
273: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
274: return 0;
275: }
276: # write the contents of the file:
277:
278: print $fh ($Contents);
279: $fh->close; # In case we ever have a filesystem w. locking
280:
281: chmod(0660, $TempFile);
282:
283: # Now we can move install the file in position.
284:
285: move($TempFile, $Filename);
286:
287: return 1;
288: }
289:
290: #
291: # PushFile: Called to do an administrative push of a file.
292: # - Ensure the file being pushed is one we support.
293: # - Backup the old file to <filename.saved>
294: # - Separate the contents of the new file out from the
295: # rest of the request.
296: # - Write the new file.
297: # Parameter:
298: # Request - The entire user request. This consists of a : separated
299: # string pushfile:tablename:contents.
300: # NOTE: The contents may have :'s in it as well making things a bit
301: # more interesting... but not much.
302: # Returns:
303: # String to send to client ("ok" or "refused" if bad file).
304: #
305: sub PushFile {
306: my $request = shift;
307: my ($command, $filename, $contents) = split(":", $request, 3);
308:
309: # At this point in time, pushes for only the following tables are
310: # supported:
311: # hosts.tab ($filename eq host).
312: # domain.tab ($filename eq domain).
313: # Construct the destination filename or reject the request.
314: #
315: # lonManage is supposed to ensure this, however this session could be
316: # part of some elaborate spoof that managed somehow to authenticate.
317: #
318:
319: my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
320: if ($filename eq "host") {
321: $tablefile .= "hosts.tab";
322: } elsif ($filename eq "domain") {
323: $tablefile .= "domain.tab";
324: } else {
325: return "refused";
326: }
327: #
328: # >copy< the old table to the backup table
329: # don't rename in case system crashes/reboots etc. in the time
330: # window between a rename and write.
331: #
332: my $backupfile = $tablefile;
333: $backupfile =~ s/\.tab$/.old/;
334: if(!CopyFile($tablefile, $backupfile)) {
335: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
336: return "error:$!";
337: }
338: &logthis('<font color="green"> Pushfile: backed up '
339: .$tablefile." to $backupfile</font>");
340:
341: # Install the new file:
342:
343: if(!InstallFile($tablefile, $contents)) {
344: &logthis('<font color="red"> Pushfile: unable to install '
345: .$tablefile." $! </font>");
346: return "error:$!";
347: }
348: else {
349: &logthis('<font color="green"> Installed new '.$tablefile
350: ."</font>");
351:
352: }
353:
354:
355: # Indicate success:
356:
357: return "ok";
358:
359: }
360:
361: #
362: # Called to re-init either lonc or lond.
363: #
364: # Parameters:
365: # request - The full request by the client. This is of the form
366: # reinit:<process>
367: # where <process> is allowed to be either of
368: # lonc or lond
369: #
370: # Returns:
371: # The string to be sent back to the client either:
372: # ok - Everything worked just fine.
373: # error:why - There was a failure and why describes the reason.
374: #
375: #
376: sub ReinitProcess {
377: my $request = shift;
378:
379: return 'ok';
380: }
381:
382: #
383: # Convert an error return code from lcpasswd to a string value.
384: #
385: sub lcpasswdstrerror {
386: my $ErrorCode = shift;
387: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
388: return "lcpasswd Unrecognized error return value ".$ErrorCode;
389: } else {
390: return $passwderrors[$ErrorCode];
391: }
392: }
393:
394: #
395: # Convert an error return code from lcuseradd to a string value:
396: #
397: sub lcuseraddstrerror {
398: my $ErrorCode = shift;
399: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
400: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
401: } else {
402: return $adderrors[$ErrorCode];
403: }
404: }
405:
406: # grabs exception and records it to log before exiting
407: sub catchexception {
408: my ($error)=@_;
409: $SIG{'QUIT'}='DEFAULT';
410: $SIG{__DIE__}='DEFAULT';
411: &logthis("<font color=red>CRITICAL: "
412: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
413: ."a crash with this error msg->[$error]</font>");
414: &logthis('Famous last words: '.$status.' - '.$lastlog);
415: if ($client) { print $client "error: $error\n"; }
416: $server->close();
417: die($error);
418: }
419:
420: sub timeout {
421: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
422: &catchexception('Timeout');
423: }
424: # -------------------------------- Set signal handlers to record abnormal exits
425:
426: $SIG{'QUIT'}=\&catchexception;
427: $SIG{__DIE__}=\&catchexception;
428:
429: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
430: &status("Read loncapa.conf and loncapa_apache.conf");
431: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
432: %perlvar=%{$perlvarref};
433: undef $perlvarref;
434:
435: # ----------------------------- Make sure this process is running from user=www
436: my $wwwid=getpwnam('www');
437: if ($wwwid!=$<) {
438: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
439: my $subj="LON: $currenthostid User ID mismatch";
440: system("echo 'User ID mismatch. lond must be run as user www.' |\
441: mailto $emailto -s '$subj' > /dev/null");
442: exit 1;
443: }
444:
445: # --------------------------------------------- Check if other instance running
446:
447: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
448:
449: if (-e $pidfile) {
450: my $lfh=IO::File->new("$pidfile");
451: my $pide=<$lfh>;
452: chomp($pide);
453: if (kill 0 => $pide) { die "already running"; }
454: }
455:
456: # ------------------------------------------------------------- Read hosts file
457:
458: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
459:
460: while (my $configline=<CONFIG>) {
461: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
462: chomp($ip); $ip=~s/\D+$//;
463: $hostid{$ip}=$id;
464: $hostdom{$id}=$domain;
465: $hostip{$id}=$ip;
466: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
467: }
468: close(CONFIG);
469:
470: # establish SERVER socket, bind and listen.
471: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
472: Type => SOCK_STREAM,
473: Proto => 'tcp',
474: Reuse => 1,
475: Listen => 10 )
476: or die "making socket: $@\n";
477:
478: # --------------------------------------------------------- Do global variables
479:
480: # global variables
481:
482: my %children = (); # keys are current child process IDs
483: my $children = 0; # current number of children
484:
485: sub REAPER { # takes care of dead children
486: $SIG{CHLD} = \&REAPER;
487: my $pid = wait;
488: if (defined($children{$pid})) {
489: &logthis("Child $pid died");
490: $children --;
491: delete $children{$pid};
492: } else {
493: &logthis("Unknown Child $pid died");
494: }
495: }
496:
497: sub HUNTSMAN { # signal handler for SIGINT
498: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
499: kill 'INT' => keys %children;
500: &logthis("Free socket: ".shutdown($server,2)); # free up socket
501: my $execdir=$perlvar{'lonDaemons'};
502: unlink("$execdir/logs/lond.pid");
503: &logthis("<font color=red>CRITICAL: Shutting down</font>");
504: exit; # clean up with dignity
505: }
506:
507: sub HUPSMAN { # signal handler for SIGHUP
508: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
509: kill 'INT' => keys %children;
510: &logthis("Free socket: ".shutdown($server,2)); # free up socket
511: &logthis("<font color=red>CRITICAL: Restarting</font>");
512: my $execdir=$perlvar{'lonDaemons'};
513: unlink("$execdir/logs/lond.pid");
514: exec("$execdir/lond"); # here we go again
515: }
516:
517: #
518: # Called in response to a USR2 signal.
519: # - Reread hosts.tab
520: # - All children connected to hosts that were removed from hosts.tab
521: # are killed via SIGINT
522: # - All children connected to previously existing hosts are sent SIGUSR1
523: # - Our internal hosts hash is updated to reflect the new contents of
524: # hosts.tab causing connections from hosts added to hosts.tab to
525: # now be honored.
526: #
527: sub UpdateHosts {
528: }
529:
530: sub checkchildren {
531: &initnewstatus();
532: &logstatus();
533: &logthis('Going to check on the children');
534: my $docdir=$perlvar{'lonDocRoot'};
535: foreach (sort keys %children) {
536: sleep 1;
537: unless (kill 'USR1' => $_) {
538: &logthis ('Child '.$_.' is dead');
539: &logstatus($$.' is dead');
540: }
541: }
542: sleep 5;
543: $SIG{ALRM} = sub { die "timeout" };
544: $SIG{__DIE__} = 'DEFAULT';
545: foreach (sort keys %children) {
546: unless (-e "$docdir/lon-status/londchld/$_.txt") {
547: eval {
548: alarm(300);
549: &logthis('Child '.$_.' did not respond');
550: kill 9 => $_;
551: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
552: #$subj="LON: $currenthostid killed lond process $_";
553: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
554: #$execdir=$perlvar{'lonDaemons'};
555: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
556: alarm(0);
557: }
558: }
559: }
560: $SIG{ALRM} = 'DEFAULT';
561: $SIG{__DIE__} = \&cathcexception;
562: }
563:
564: # --------------------------------------------------------------------- Logging
565:
566: sub logthis {
567: my $message=shift;
568: my $execdir=$perlvar{'lonDaemons'};
569: my $fh=IO::File->new(">>$execdir/logs/lond.log");
570: my $now=time;
571: my $local=localtime($now);
572: $lastlog=$local.': '.$message;
573: print $fh "$local ($$): $message\n";
574: }
575:
576: # ------------------------- Conditional log if $DEBUG true.
577: sub Debug {
578: my $message = shift;
579: if($DEBUG) {
580: &logthis($message);
581: }
582: }
583: # ------------------------------------------------------------------ Log status
584:
585: sub logstatus {
586: my $docdir=$perlvar{'lonDocRoot'};
587: {
588: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
589: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
590: $fh->close();
591: }
592: {
593: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
594: print $fh $status."\n".$lastlog."\n".time;
595: $fh->close();
596: }
597: }
598:
599: sub initnewstatus {
600: my $docdir=$perlvar{'lonDocRoot'};
601: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
602: my $now=time;
603: my $local=localtime($now);
604: print $fh "LOND status $local - parent $$\n\n";
605: opendir(DIR,"$docdir/lon-status/londchld");
606: while (my $filename=readdir(DIR)) {
607: unlink("$docdir/lon-status/londchld/$filename");
608: }
609: closedir(DIR);
610: }
611:
612: # -------------------------------------------------------------- Status setting
613:
614: sub status {
615: my $what=shift;
616: my $now=time;
617: my $local=localtime($now);
618: $status=$local.': '.$what;
619: $0='lond: '.$what.' '.$local;
620: }
621:
622: # -------------------------------------------------------- Escape Special Chars
623:
624: sub escape {
625: my $str=shift;
626: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
627: return $str;
628: }
629:
630: # ----------------------------------------------------- Un-Escape Special Chars
631:
632: sub unescape {
633: my $str=shift;
634: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
635: return $str;
636: }
637:
638: # ----------------------------------------------------------- Send USR1 to lonc
639:
640: sub reconlonc {
641: my $peerfile=shift;
642: &logthis("Trying to reconnect for $peerfile");
643: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
644: if (my $fh=IO::File->new("$loncfile")) {
645: my $loncpid=<$fh>;
646: chomp($loncpid);
647: if (kill 0 => $loncpid) {
648: &logthis("lonc at pid $loncpid responding, sending USR1");
649: kill USR1 => $loncpid;
650: } else {
651: &logthis(
652: "<font color=red>CRITICAL: "
653: ."lonc at pid $loncpid not responding, giving up</font>");
654: }
655: } else {
656: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
657: }
658: }
659:
660: # -------------------------------------------------- Non-critical communication
661:
662: sub subreply {
663: my ($cmd,$server)=@_;
664: my $peerfile="$perlvar{'lonSockDir'}/$server";
665: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
666: Type => SOCK_STREAM,
667: Timeout => 10)
668: or return "con_lost";
669: print $sclient "$cmd\n";
670: my $answer=<$sclient>;
671: chomp($answer);
672: if (!$answer) { $answer="con_lost"; }
673: return $answer;
674: }
675:
676: sub reply {
677: my ($cmd,$server)=@_;
678: my $answer;
679: if ($server ne $currenthostid) {
680: $answer=subreply($cmd,$server);
681: if ($answer eq 'con_lost') {
682: $answer=subreply("ping",$server);
683: if ($answer ne $server) {
684: &logthis("sub reply: answer != server answer is $answer, server is $server");
685: &reconlonc("$perlvar{'lonSockDir'}/$server");
686: }
687: $answer=subreply($cmd,$server);
688: }
689: } else {
690: $answer='self_reply';
691: }
692: return $answer;
693: }
694:
695: # -------------------------------------------------------------- Talk to lonsql
696:
697: sub sqlreply {
698: my ($cmd)=@_;
699: my $answer=subsqlreply($cmd);
700: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
701: return $answer;
702: }
703:
704: sub subsqlreply {
705: my ($cmd)=@_;
706: my $unixsock="mysqlsock";
707: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
708: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
709: Type => SOCK_STREAM,
710: Timeout => 10)
711: or return "con_lost";
712: print $sclient "$cmd\n";
713: my $answer=<$sclient>;
714: chomp($answer);
715: if (!$answer) { $answer="con_lost"; }
716: return $answer;
717: }
718:
719: # -------------------------------------------- Return path to profile directory
720:
721: sub propath {
722: my ($udom,$uname)=@_;
723: $udom=~s/\W//g;
724: $uname=~s/\W//g;
725: my $subdir=$uname.'__';
726: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
727: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
728: return $proname;
729: }
730:
731: # --------------------------------------- Is this the home server of an author?
732:
733: sub ishome {
734: my $author=shift;
735: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
736: my ($udom,$uname)=split(/\//,$author);
737: my $proname=propath($udom,$uname);
738: if (-e $proname) {
739: return 'owner';
740: } else {
741: return 'not_owner';
742: }
743: }
744:
745: # ======================================================= Continue main program
746: # ---------------------------------------------------- Fork once and dissociate
747:
748: my $fpid=fork;
749: exit if $fpid;
750: die "Couldn't fork: $!" unless defined ($fpid);
751:
752: POSIX::setsid() or die "Can't start new session: $!";
753:
754: # ------------------------------------------------------- Write our PID on disk
755:
756: my $execdir=$perlvar{'lonDaemons'};
757: open (PIDSAVE,">$execdir/logs/lond.pid");
758: print PIDSAVE "$$\n";
759: close(PIDSAVE);
760: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
761: &status('Starting');
762:
763:
764:
765: # ----------------------------------------------------- Install signal handlers
766:
767:
768: $SIG{CHLD} = \&REAPER;
769: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
770: $SIG{HUP} = \&HUPSMAN;
771: $SIG{USR1} = \&checkchildren;
772: $SIG{USR2} = \&UpdateHosts;
773:
774:
775: # --------------------------------------------------------------
776: # Accept connections. When a connection comes in, it is validated
777: # and if good, a child process is created to process transactions
778: # along the connection.
779:
780: while (1) {
781: $client = $server->accept() or next;
782: make_new_child($client);
783: }
784:
785: sub make_new_child {
786: my $pid;
787: my $cipher;
788: my $sigset;
789:
790: $client = shift;
791: &logthis("Attempting to start child");
792: # block signal for fork
793: $sigset = POSIX::SigSet->new(SIGINT);
794: sigprocmask(SIG_BLOCK, $sigset)
795: or die "Can't block SIGINT for fork: $!\n";
796:
797: die "fork: $!" unless defined ($pid = fork);
798:
799: if ($pid) {
800: # Parent records the child's birth and returns.
801: sigprocmask(SIG_UNBLOCK, $sigset)
802: or die "Can't unblock SIGINT for fork: $!\n";
803: $children{$pid} = 1;
804: $children++;
805: &status('Started child '.$pid);
806: return;
807: } else {
808: # Child can *not* return from this subroutine.
809: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
810: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
811: #don't get intercepted
812: $SIG{USR1}= \&logstatus;
813: $SIG{ALRM}= \&timeout;
814: $lastlog='Forked ';
815: $status='Forked';
816:
817: # unblock signals
818: sigprocmask(SIG_UNBLOCK, $sigset)
819: or die "Can't unblock SIGINT for fork: $!\n";
820:
821: my $tmpsnum=0;
822: #---------------------------------------------------- kerberos 5 initialization
823: &Authen::Krb5::init_context();
824: &Authen::Krb5::init_ets();
825:
826: &status('Accepted connection');
827: # =============================================================================
828: # do something with the connection
829: # -----------------------------------------------------------------------------
830: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
831: # connection liveness.
832: # see if we know client and check for spoof IP by challenge
833: my $caller = getpeername($client);
834: my ($port,$iaddr)=unpack_sockaddr_in($caller);
835: $clientip=inet_ntoa($iaddr);
836: my $clientrec=($hostid{$clientip} ne undef);
837: &logthis(
838: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
839: );
840: &status("Connecting $clientip ($hostid{$clientip})");
841: my $clientok;
842: if ($clientrec) {
843: &status("Waiting for init from $clientip ($hostid{$clientip})");
844: my $remotereq=<$client>;
845: $remotereq=~s/[^\w:]//g;
846: if ($remotereq =~ /^init/) {
847: &sethost("sethost:$perlvar{'lonHostID'}");
848: my $challenge="$$".time;
849: print $client "$challenge\n";
850: &status(
851: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
852: $remotereq=<$client>;
853: $remotereq=~s/\W//g;
854: if ($challenge eq $remotereq) {
855: $clientok=1;
856: print $client "ok\n";
857: } else {
858: &logthis(
859: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
860: &status('No challenge reply '.$clientip);
861: }
862: } else {
863: &logthis(
864: "<font color=blue>WARNING: "
865: ."$clientip failed to initialize: >$remotereq< </font>");
866: &status('No init '.$clientip);
867: }
868: } else {
869: &logthis(
870: "<font color=blue>WARNING: Unknown client $clientip</font>");
871: &status('Hung up on '.$clientip);
872: }
873: if ($clientok) {
874: # ---------------- New known client connecting, could mean machine online again
875:
876: foreach my $id (keys(%hostip)) {
877: if ($hostip{$id} ne $clientip ||
878: $hostip{$currenthostid} eq $clientip) {
879: # no need to try to do recon's to myself
880: next;
881: }
882: &reconlonc("$perlvar{'lonSockDir'}/$id");
883: }
884: &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
885: &status('Will listen to '.$hostid{$clientip});
886: # ------------------------------------------------------------ Process requests
887: while (my $userinput=<$client>) {
888: chomp($userinput);
889: Debug("Request = $userinput\n");
890: &status('Processing '.$hostid{$clientip}.': '.$userinput);
891: my $wasenc=0;
892: alarm(120);
893: # ------------------------------------------------------------ See if encrypted
894: if ($userinput =~ /^enc/) {
895: if ($cipher) {
896: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
897: $userinput='';
898: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
899: $userinput.=
900: $cipher->decrypt(
901: pack("H16",substr($encinput,$encidx,16))
902: );
903: }
904: $userinput=substr($userinput,0,$cmdlength);
905: $wasenc=1;
906: }
907: }
908:
909: # ------------------------------------------------------------- Normal commands
910: # ------------------------------------------------------------------------ ping
911: if ($userinput =~ /^ping/) {
912: print $client "$currenthostid\n";
913: # ------------------------------------------------------------------------ pong
914: }elsif ($userinput =~ /^pong/) {
915: my $reply=&reply("ping",$hostid{$clientip});
916: print $client "$currenthostid:$reply\n";
917: # ------------------------------------------------------------------------ ekey
918: } elsif ($userinput =~ /^ekey/) {
919: my $buildkey=time.$$.int(rand 100000);
920: $buildkey=~tr/1-6/A-F/;
921: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
922: my $key=$currenthostid.$hostid{$clientip};
923: $key=~tr/a-z/A-Z/;
924: $key=~tr/G-P/0-9/;
925: $key=~tr/Q-Z/0-9/;
926: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
927: $key=substr($key,0,32);
928: my $cipherkey=pack("H32",$key);
929: $cipher=new IDEA $cipherkey;
930: print $client "$buildkey\n";
931: # ------------------------------------------------------------------------ load
932: } elsif ($userinput =~ /^load/) {
933: my $loadavg;
934: {
935: my $loadfile=IO::File->new('/proc/loadavg');
936: $loadavg=<$loadfile>;
937: }
938: $loadavg =~ s/\s.*//g;
939: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
940: print $client "$loadpercent\n";
941: # -------------------------------------------------------------------- userload
942: } elsif ($userinput =~ /^userload/) {
943: my $userloadpercent=&userload();
944: print $client "$userloadpercent\n";
945:
946: #
947: # Transactions requiring encryption:
948: #
949: # ----------------------------------------------------------------- currentauth
950: } elsif ($userinput =~ /^currentauth/) {
951: if ($wasenc==1) {
952: my ($cmd,$udom,$uname)=split(/:/,$userinput);
953: my $result = GetAuthType($udom, $uname);
954: if($result eq "nouser") {
955: print $client "unknown_user\n";
956: }
957: else {
958: print $client "$result\n"
959: }
960: } else {
961: print $client "refused\n";
962: }
963: #--------------------------------------------------------------------- pushfile
964: } elsif($userinput =~ /^pushfile/) {
965: if($wasenc == 1) {
966: my $cert = GetCertificate($userinput);
967: if(ValidManager($cert)) {
968: my $reply = PushFile($userinput);
969: print $client "$reply\n";
970: } else {
971: print $client "refused\n";
972: }
973: } else {
974: print $client "refused\n";
975: }
976: #--------------------------------------------------------------------- reinit
977: } elsif($userinput =~ /^reinit/) {
978: if ($wasenc == 1) {
979: my $cert = GetCertificate($userinput);
980: if(ValidManager($cert)) {
981: my $reply = ReinitProcess($userinput);
982: print $client "$reply\n";
983: } else {
984: print $client "refused\n";
985: }
986: } else {
987: print $client "refused\n";
988: }
989: # ------------------------------------------------------------------------ auth
990: } elsif ($userinput =~ /^auth/) {
991: if ($wasenc==1) {
992: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
993: chomp($upass);
994: $upass=unescape($upass);
995: my $proname=propath($udom,$uname);
996: my $passfilename="$proname/passwd";
997: if (-e $passfilename) {
998: my $pf = IO::File->new($passfilename);
999: my $realpasswd=<$pf>;
1000: chomp($realpasswd);
1001: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1002: my $pwdcorrect=0;
1003: if ($howpwd eq 'internal') {
1004: &Debug("Internal auth");
1005: $pwdcorrect=
1006: (crypt($upass,$contentpwd) eq $contentpwd);
1007: } elsif ($howpwd eq 'unix') {
1008: &Debug("Unix auth");
1009: if((getpwnam($uname))[1] eq "") { #no such user!
1010: $pwdcorrect = 0;
1011: } else {
1012: $contentpwd=(getpwnam($uname))[1];
1013: my $pwauth_path="/usr/local/sbin/pwauth";
1014: unless ($contentpwd eq 'x') {
1015: $pwdcorrect=
1016: (crypt($upass,$contentpwd) eq
1017: $contentpwd);
1018: }
1019:
1020: elsif (-e $pwauth_path) {
1021: open PWAUTH, "|$pwauth_path" or
1022: die "Cannot invoke authentication";
1023: print PWAUTH "$uname\n$upass\n";
1024: close PWAUTH;
1025: $pwdcorrect=!$?;
1026: }
1027: }
1028: } elsif ($howpwd eq 'krb4') {
1029: my $null=pack("C",0);
1030: unless ($upass=~/$null/) {
1031: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1032: ($uname,"",$contentpwd,'krbtgt',
1033: $contentpwd,1,$upass);
1034: if (!$krb4_error) {
1035: $pwdcorrect = 1;
1036: } else {
1037: $pwdcorrect=0;
1038: # log error if it is not a bad password
1039: if ($krb4_error != 62) {
1040: &logthis('krb4:'.$uname.','.$contentpwd.','.
1041: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1042: }
1043: }
1044: }
1045: } elsif ($howpwd eq 'krb5') {
1046: my $null=pack("C",0);
1047: unless ($upass=~/$null/) {
1048: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1049: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1050: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1051: my $credentials=&Authen::Krb5::cc_default();
1052: $credentials->initialize($krbclient);
1053: my $krbreturn =
1054: &Authen::Krb5::get_in_tkt_with_password(
1055: $krbclient,$krbserver,$upass,$credentials);
1056: # unless ($krbreturn) {
1057: # &logthis("Krb5 Error: ".
1058: # &Authen::Krb5::error());
1059: # }
1060: $pwdcorrect = ($krbreturn == 1);
1061: } else { $pwdcorrect=0; }
1062: } elsif ($howpwd eq 'localauth') {
1063: $pwdcorrect=&localauth::localauth($uname,$upass,
1064: $contentpwd);
1065: }
1066: if ($pwdcorrect) {
1067: print $client "authorized\n";
1068: } else {
1069: print $client "non_authorized\n";
1070: }
1071: } else {
1072: print $client "unknown_user\n";
1073: }
1074: } else {
1075: print $client "refused\n";
1076: }
1077: # ---------------------------------------------------------------------- passwd
1078: } elsif ($userinput =~ /^passwd/) {
1079: if ($wasenc==1) {
1080: my
1081: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1082: chomp($npass);
1083: $upass=&unescape($upass);
1084: $npass=&unescape($npass);
1085: &Debug("Trying to change password for $uname");
1086: my $proname=propath($udom,$uname);
1087: my $passfilename="$proname/passwd";
1088: if (-e $passfilename) {
1089: my $realpasswd;
1090: { my $pf = IO::File->new($passfilename);
1091: $realpasswd=<$pf>; }
1092: chomp($realpasswd);
1093: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1094: if ($howpwd eq 'internal') {
1095: &Debug("internal auth");
1096: if (crypt($upass,$contentpwd) eq $contentpwd) {
1097: my $salt=time;
1098: $salt=substr($salt,6,2);
1099: my $ncpass=crypt($npass,$salt);
1100: {
1101: my $pf;
1102: if ($pf = IO::File->new(">$passfilename")) {
1103: print $pf "internal:$ncpass\n";
1104: &logthis("Result of password change for $uname: pwchange_success");
1105: print $client "ok\n";
1106: } else {
1107: &logthis("Unable to open $uname passwd to change password");
1108: print $client "non_authorized\n";
1109: }
1110: }
1111:
1112: } else {
1113: print $client "non_authorized\n";
1114: }
1115: } elsif ($howpwd eq 'unix') {
1116: # Unix means we have to access /etc/password
1117: # one way or another.
1118: # First: Make sure the current password is
1119: # correct
1120: &Debug("auth is unix");
1121: $contentpwd=(getpwnam($uname))[1];
1122: my $pwdcorrect = "0";
1123: my $pwauth_path="/usr/local/sbin/pwauth";
1124: unless ($contentpwd eq 'x') {
1125: $pwdcorrect=
1126: (crypt($upass,$contentpwd) eq $contentpwd);
1127: } elsif (-e $pwauth_path) {
1128: open PWAUTH, "|$pwauth_path" or
1129: die "Cannot invoke authentication";
1130: print PWAUTH "$uname\n$upass\n";
1131: close PWAUTH;
1132: &Debug("exited pwauth with $? ($uname,$upass) ");
1133: $pwdcorrect=($? == 0);
1134: }
1135: if ($pwdcorrect) {
1136: my $execdir=$perlvar{'lonDaemons'};
1137: &Debug("Opening lcpasswd pipeline");
1138: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1139: print $pf "$uname\n$npass\n$npass\n";
1140: close $pf;
1141: my $err = $?;
1142: my $result = ($err>0 ? 'pwchange_failure'
1143: : 'ok');
1144: &logthis("Result of password change for $uname: ".
1145: &lcpasswdstrerror($?));
1146: print $client "$result\n";
1147: } else {
1148: print $client "non_authorized\n";
1149: }
1150: } else {
1151: print $client "auth_mode_error\n";
1152: }
1153: } else {
1154: print $client "unknown_user\n";
1155: }
1156: } else {
1157: print $client "refused\n";
1158: }
1159: # -------------------------------------------------------------------- makeuser
1160: } elsif ($userinput =~ /^makeuser/) {
1161: &Debug("Make user received");
1162: my $oldumask=umask(0077);
1163: if ($wasenc==1) {
1164: my
1165: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1166: &Debug("cmd =".$cmd." $udom =".$udom.
1167: " uname=".$uname);
1168: chomp($npass);
1169: $npass=&unescape($npass);
1170: my $proname=propath($udom,$uname);
1171: my $passfilename="$proname/passwd";
1172: &Debug("Password file created will be:".
1173: $passfilename);
1174: if (-e $passfilename) {
1175: print $client "already_exists\n";
1176: } elsif ($udom ne $currentdomainid) {
1177: print $client "not_right_domain\n";
1178: } else {
1179: my @fpparts=split(/\//,$proname);
1180: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1181: my $fperror='';
1182: for (my $i=3;$i<=$#fpparts;$i++) {
1183: $fpnow.='/'.$fpparts[$i];
1184: unless (-e $fpnow) {
1185: unless (mkdir($fpnow,0777)) {
1186: $fperror="error: ".($!+0)
1187: ." mkdir failed while attempting "
1188: ."makeuser\n";
1189: }
1190: }
1191: }
1192: unless ($fperror) {
1193: my $result=&make_passwd_file($uname, $umode,$npass,
1194: $passfilename);
1195: print $client $result;
1196: } else {
1197: print $client "$fperror\n";
1198: }
1199: }
1200: } else {
1201: print $client "refused\n";
1202: }
1203: umask($oldumask);
1204: # -------------------------------------------------------------- changeuserauth
1205: } elsif ($userinput =~ /^changeuserauth/) {
1206: &Debug("Changing authorization");
1207: if ($wasenc==1) {
1208: my
1209: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1210: chomp($npass);
1211: &Debug("cmd = ".$cmd." domain= ".$udom.
1212: "uname =".$uname." umode= ".$umode);
1213: $npass=&unescape($npass);
1214: my $proname=&propath($udom,$uname);
1215: my $passfilename="$proname/passwd";
1216: if ($udom ne $currentdomainid) {
1217: print $client "not_right_domain\n";
1218: } else {
1219: my $result=&make_passwd_file($uname, $umode,$npass,
1220: $passfilename);
1221: print $client $result;
1222: }
1223: } else {
1224: print $client "refused\n";
1225: }
1226: # ------------------------------------------------------------------------ home
1227: } elsif ($userinput =~ /^home/) {
1228: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1229: chomp($uname);
1230: my $proname=propath($udom,$uname);
1231: if (-e $proname) {
1232: print $client "found\n";
1233: } else {
1234: print $client "not_found\n";
1235: }
1236: # ---------------------------------------------------------------------- update
1237: } elsif ($userinput =~ /^update/) {
1238: my ($cmd,$fname)=split(/:/,$userinput);
1239: my $ownership=ishome($fname);
1240: if ($ownership eq 'not_owner') {
1241: if (-e $fname) {
1242: my ($dev,$ino,$mode,$nlink,
1243: $uid,$gid,$rdev,$size,
1244: $atime,$mtime,$ctime,
1245: $blksize,$blocks)=stat($fname);
1246: my $now=time;
1247: my $since=$now-$atime;
1248: if ($since>$perlvar{'lonExpire'}) {
1249: my $reply=
1250: &reply("unsub:$fname","$hostid{$clientip}");
1251: unlink("$fname");
1252: } else {
1253: my $transname="$fname.in.transfer";
1254: my $remoteurl=
1255: reply("sub:$fname","$hostid{$clientip}");
1256: my $response;
1257: {
1258: my $ua=new LWP::UserAgent;
1259: my $request=new HTTP::Request('GET',"$remoteurl");
1260: $response=$ua->request($request,$transname);
1261: }
1262: if ($response->is_error()) {
1263: unlink($transname);
1264: my $message=$response->status_line;
1265: &logthis(
1266: "LWP GET: $message for $fname ($remoteurl)");
1267: } else {
1268: if ($remoteurl!~/\.meta$/) {
1269: my $ua=new LWP::UserAgent;
1270: my $mrequest=
1271: new HTTP::Request('GET',$remoteurl.'.meta');
1272: my $mresponse=
1273: $ua->request($mrequest,$fname.'.meta');
1274: if ($mresponse->is_error()) {
1275: unlink($fname.'.meta');
1276: }
1277: }
1278: rename($transname,$fname);
1279: }
1280: }
1281: print $client "ok\n";
1282: } else {
1283: print $client "not_found\n";
1284: }
1285: } else {
1286: print $client "rejected\n";
1287: }
1288: # -------------------------------------- fetch a user file from a remote server
1289: } elsif ($userinput =~ /^fetchuserfile/) {
1290: my ($cmd,$fname)=split(/:/,$userinput);
1291: my ($udom,$uname,$ufile)=split(/\//,$fname);
1292: my $udir=propath($udom,$uname).'/userfiles';
1293: unless (-e $udir) { mkdir($udir,0770); }
1294: if (-e $udir) {
1295: $ufile=~s/^[\.\~]+//;
1296: $ufile=~s/\///g;
1297: my $transname=$udir.'/'.$ufile;
1298: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1299: my $response;
1300: {
1301: my $ua=new LWP::UserAgent;
1302: my $request=new HTTP::Request('GET',"$remoteurl");
1303: $response=$ua->request($request,$transname);
1304: }
1305: if ($response->is_error()) {
1306: unlink($transname);
1307: my $message=$response->status_line;
1308: &logthis(
1309: "LWP GET: $message for $fname ($remoteurl)");
1310: print $client "failed\n";
1311: } else {
1312: print $client "ok\n";
1313: }
1314: } else {
1315: print $client "not_home\n";
1316: }
1317: # ------------------------------------------ authenticate access to a user file
1318: } elsif ($userinput =~ /^tokenauthuserfile/) {
1319: my ($cmd,$fname,$session)=split(/:/,$userinput);
1320: chomp($session);
1321: my $reply='non_auth';
1322: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1323: $session.'.id')) {
1324: while (my $line=<ENVIN>) {
1325: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1326: }
1327: close(ENVIN);
1328: print $client $reply."\n";
1329: } else {
1330: print $client "invalid_token\n";
1331: }
1332: # ----------------------------------------------------------------- unsubscribe
1333: } elsif ($userinput =~ /^unsub/) {
1334: my ($cmd,$fname)=split(/:/,$userinput);
1335: if (-e $fname) {
1336: print $client &unsub($client,$fname,$clientip);
1337: } else {
1338: print $client "not_found\n";
1339: }
1340: # ------------------------------------------------------------------- subscribe
1341: } elsif ($userinput =~ /^sub/) {
1342: print $client &subscribe($userinput,$clientip);
1343: # ------------------------------------------------------------- current version
1344: } elsif ($userinput =~ /^currentversion/) {
1345: my ($cmd,$fname)=split(/:/,$userinput);
1346: print $client ¤tversion($fname)."\n";
1347: # ------------------------------------------------------------------------- log
1348: } elsif ($userinput =~ /^log/) {
1349: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1350: chomp($what);
1351: my $proname=propath($udom,$uname);
1352: my $now=time;
1353: {
1354: my $hfh;
1355: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1356: print $hfh "$now:$hostid{$clientip}:$what\n";
1357: print $client "ok\n";
1358: } else {
1359: print $client "error: ".($!+0)
1360: ." IO::File->new Failed "
1361: ."while attempting log\n";
1362: }
1363: }
1364: # ------------------------------------------------------------------------- put
1365: } elsif ($userinput =~ /^put/) {
1366: my ($cmd,$udom,$uname,$namespace,$what)
1367: =split(/:/,$userinput);
1368: $namespace=~s/\//\_/g;
1369: $namespace=~s/\W//g;
1370: if ($namespace ne 'roles') {
1371: chomp($what);
1372: my $proname=propath($udom,$uname);
1373: my $now=time;
1374: unless ($namespace=~/^nohist\_/) {
1375: my $hfh;
1376: if (
1377: $hfh=IO::File->new(">>$proname/$namespace.hist")
1378: ) { print $hfh "P:$now:$what\n"; }
1379: }
1380: my @pairs=split(/\&/,$what);
1381: my %hash;
1382: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1383: foreach my $pair (@pairs) {
1384: my ($key,$value)=split(/=/,$pair);
1385: $hash{$key}=$value;
1386: }
1387: if (untie(%hash)) {
1388: print $client "ok\n";
1389: } else {
1390: print $client "error: ".($!+0)
1391: ." untie(GDBM) failed ".
1392: "while attempting put\n";
1393: }
1394: } else {
1395: print $client "error: ".($!)
1396: ." tie(GDBM) Failed ".
1397: "while attempting put\n";
1398: }
1399: } else {
1400: print $client "refused\n";
1401: }
1402: # -------------------------------------------------------------------- rolesput
1403: } elsif ($userinput =~ /^rolesput/) {
1404: &Debug("rolesput");
1405: if ($wasenc==1) {
1406: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1407: =split(/:/,$userinput);
1408: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1409: "user = ".$exeuser." udom=".$udom.
1410: "what = ".$what);
1411: my $namespace='roles';
1412: chomp($what);
1413: my $proname=propath($udom,$uname);
1414: my $now=time;
1415: {
1416: my $hfh;
1417: if (
1418: $hfh=IO::File->new(">>$proname/$namespace.hist")
1419: ) {
1420: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1421: }
1422: }
1423: my @pairs=split(/\&/,$what);
1424: my %hash;
1425: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1426: foreach my $pair (@pairs) {
1427: my ($key,$value)=split(/=/,$pair);
1428: &ManagePermissions($key, $udom, $uname,
1429: &GetAuthType( $udom,
1430: $uname));
1431: $hash{$key}=$value;
1432: }
1433: if (untie(%hash)) {
1434: print $client "ok\n";
1435: } else {
1436: print $client "error: ".($!+0)
1437: ." untie(GDBM) Failed ".
1438: "while attempting rolesput\n";
1439: }
1440: } else {
1441: print $client "error: ".($!+0)
1442: ." tie(GDBM) Failed ".
1443: "while attempting rolesput\n";
1444: }
1445: } else {
1446: print $client "refused\n";
1447: }
1448: # -------------------------------------------------------------------- rolesdel
1449: } elsif ($userinput =~ /^rolesdel/) {
1450: &Debug("rolesdel");
1451: if ($wasenc==1) {
1452: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1453: =split(/:/,$userinput);
1454: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1455: "user = ".$exeuser." udom=".$udom.
1456: "what = ".$what);
1457: my $namespace='roles';
1458: chomp($what);
1459: my $proname=propath($udom,$uname);
1460: my $now=time;
1461: {
1462: my $hfh;
1463: if (
1464: $hfh=IO::File->new(">>$proname/$namespace.hist")
1465: ) {
1466: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1467: }
1468: }
1469: my @rolekeys=split(/\&/,$what);
1470: my %hash;
1471: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1472: foreach my $key (@rolekeys) {
1473: delete $hash{$key};
1474: }
1475: if (untie(%hash)) {
1476: print $client "ok\n";
1477: } else {
1478: print $client "error: ".($!+0)
1479: ." untie(GDBM) Failed ".
1480: "while attempting rolesdel\n";
1481: }
1482: } else {
1483: print $client "error: ".($!+0)
1484: ." tie(GDBM) Failed ".
1485: "while attempting rolesdel\n";
1486: }
1487: } else {
1488: print $client "refused\n";
1489: }
1490: # ------------------------------------------------------------------------- get
1491: } elsif ($userinput =~ /^get/) {
1492: my ($cmd,$udom,$uname,$namespace,$what)
1493: =split(/:/,$userinput);
1494: $namespace=~s/\//\_/g;
1495: $namespace=~s/\W//g;
1496: chomp($what);
1497: my @queries=split(/\&/,$what);
1498: my $proname=propath($udom,$uname);
1499: my $qresult='';
1500: my %hash;
1501: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1502: for (my $i=0;$i<=$#queries;$i++) {
1503: $qresult.="$hash{$queries[$i]}&";
1504: }
1505: if (untie(%hash)) {
1506: $qresult=~s/\&$//;
1507: print $client "$qresult\n";
1508: } else {
1509: print $client "error: ".($!+0)
1510: ." untie(GDBM) Failed ".
1511: "while attempting get\n";
1512: }
1513: } else {
1514: if ($!+0 == 2) {
1515: print $client "error:No such file or ".
1516: "GDBM reported bad block error\n";
1517: } else {
1518: print $client "error: ".($!+0)
1519: ." tie(GDBM) Failed ".
1520: "while attempting get\n";
1521: }
1522: }
1523: # ------------------------------------------------------------------------ eget
1524: } elsif ($userinput =~ /^eget/) {
1525: my ($cmd,$udom,$uname,$namespace,$what)
1526: =split(/:/,$userinput);
1527: $namespace=~s/\//\_/g;
1528: $namespace=~s/\W//g;
1529: chomp($what);
1530: my @queries=split(/\&/,$what);
1531: my $proname=propath($udom,$uname);
1532: my $qresult='';
1533: my %hash;
1534: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1535: for (my $i=0;$i<=$#queries;$i++) {
1536: $qresult.="$hash{$queries[$i]}&";
1537: }
1538: if (untie(%hash)) {
1539: $qresult=~s/\&$//;
1540: if ($cipher) {
1541: my $cmdlength=length($qresult);
1542: $qresult.=" ";
1543: my $encqresult='';
1544: for
1545: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1546: $encqresult.=
1547: unpack("H16",
1548: $cipher->encrypt(substr($qresult,$encidx,8)));
1549: }
1550: print $client "enc:$cmdlength:$encqresult\n";
1551: } else {
1552: print $client "error:no_key\n";
1553: }
1554: } else {
1555: print $client "error: ".($!+0)
1556: ." untie(GDBM) Failed ".
1557: "while attempting eget\n";
1558: }
1559: } else {
1560: print $client "error: ".($!+0)
1561: ." tie(GDBM) Failed ".
1562: "while attempting eget\n";
1563: }
1564: # ------------------------------------------------------------------------- del
1565: } elsif ($userinput =~ /^del/) {
1566: my ($cmd,$udom,$uname,$namespace,$what)
1567: =split(/:/,$userinput);
1568: $namespace=~s/\//\_/g;
1569: $namespace=~s/\W//g;
1570: chomp($what);
1571: my $proname=propath($udom,$uname);
1572: my $now=time;
1573: unless ($namespace=~/^nohist\_/) {
1574: my $hfh;
1575: if (
1576: $hfh=IO::File->new(">>$proname/$namespace.hist")
1577: ) { print $hfh "D:$now:$what\n"; }
1578: }
1579: my @keys=split(/\&/,$what);
1580: my %hash;
1581: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1582: foreach my $key (@keys) {
1583: delete($hash{$key});
1584: }
1585: if (untie(%hash)) {
1586: print $client "ok\n";
1587: } else {
1588: print $client "error: ".($!+0)
1589: ." untie(GDBM) Failed ".
1590: "while attempting del\n";
1591: }
1592: } else {
1593: print $client "error: ".($!+0)
1594: ." tie(GDBM) Failed ".
1595: "while attempting del\n";
1596: }
1597: # ------------------------------------------------------------------------ keys
1598: } elsif ($userinput =~ /^keys/) {
1599: my ($cmd,$udom,$uname,$namespace)
1600: =split(/:/,$userinput);
1601: $namespace=~s/\//\_/g;
1602: $namespace=~s/\W//g;
1603: my $proname=propath($udom,$uname);
1604: my $qresult='';
1605: my %hash;
1606: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1607: foreach my $key (keys %hash) {
1608: $qresult.="$key&";
1609: }
1610: if (untie(%hash)) {
1611: $qresult=~s/\&$//;
1612: print $client "$qresult\n";
1613: } else {
1614: print $client "error: ".($!+0)
1615: ." untie(GDBM) Failed ".
1616: "while attempting keys\n";
1617: }
1618: } else {
1619: print $client "error: ".($!+0)
1620: ." tie(GDBM) Failed ".
1621: "while attempting keys\n";
1622: }
1623: # ----------------------------------------------------------------- dumpcurrent
1624: } elsif ($userinput =~ /^currentdump/) {
1625: my ($cmd,$udom,$uname,$namespace)
1626: =split(/:/,$userinput);
1627: $namespace=~s/\//\_/g;
1628: $namespace=~s/\W//g;
1629: my $qresult='';
1630: my $proname=propath($udom,$uname);
1631: my %hash;
1632: if (tie(%hash,'GDBM_File',
1633: "$proname/$namespace.db",
1634: &GDBM_READER(),0640)) {
1635: # Structure of %data:
1636: # $data{$symb}->{$parameter}=$value;
1637: # $data{$symb}->{'v.'.$parameter}=$version;
1638: # since $parameter will be unescaped, we do not
1639: # have to worry about silly parameter names...
1640: my %data = ();
1641: while (my ($key,$value) = each(%hash)) {
1642: my ($v,$symb,$param) = split(/:/,$key);
1643: next if ($v eq 'version' || $symb eq 'keys');
1644: next if (exists($data{$symb}) &&
1645: exists($data{$symb}->{$param}) &&
1646: $data{$symb}->{'v.'.$param} > $v);
1647: $data{$symb}->{$param}=$value;
1648: $data{$symb}->{'v.'.$param}=$v;
1649: }
1650: if (untie(%hash)) {
1651: while (my ($symb,$param_hash) = each(%data)) {
1652: while(my ($param,$value) = each (%$param_hash)){
1653: next if ($param =~ /^v\./);
1654: $qresult.=$symb.':'.$param.'='.$value.'&';
1655: }
1656: }
1657: chop($qresult);
1658: print $client "$qresult\n";
1659: } else {
1660: print $client "error: ".($!+0)
1661: ." untie(GDBM) Failed ".
1662: "while attempting currentdump\n";
1663: }
1664: } else {
1665: print $client "error: ".($!+0)
1666: ." tie(GDBM) Failed ".
1667: "while attempting currentdump\n";
1668: }
1669: # ------------------------------------------------------------------------ dump
1670: } elsif ($userinput =~ /^dump/) {
1671: my ($cmd,$udom,$uname,$namespace,$regexp)
1672: =split(/:/,$userinput);
1673: $namespace=~s/\//\_/g;
1674: $namespace=~s/\W//g;
1675: if (defined($regexp)) {
1676: $regexp=&unescape($regexp);
1677: } else {
1678: $regexp='.';
1679: }
1680: my $qresult='';
1681: my $proname=propath($udom,$uname);
1682: my %hash;
1683: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1684: study($regexp);
1685: while (my ($key,$value) = each(%hash)) {
1686: if ($regexp eq '.') {
1687: $qresult.=$key.'='.$value.'&';
1688: } else {
1689: my $unescapeKey = &unescape($key);
1690: if (eval('$unescapeKey=~/$regexp/')) {
1691: $qresult.="$key=$value&";
1692: }
1693: }
1694: }
1695: if (untie(%hash)) {
1696: chop($qresult);
1697: print $client "$qresult\n";
1698: } else {
1699: print $client "error: ".($!+0)
1700: ." untie(GDBM) Failed ".
1701: "while attempting dump\n";
1702: }
1703: } else {
1704: print $client "error: ".($!+0)
1705: ." tie(GDBM) Failed ".
1706: "while attempting dump\n";
1707: }
1708: # ----------------------------------------------------------------------- store
1709: } elsif ($userinput =~ /^store/) {
1710: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1711: =split(/:/,$userinput);
1712: $namespace=~s/\//\_/g;
1713: $namespace=~s/\W//g;
1714: if ($namespace ne 'roles') {
1715: chomp($what);
1716: my $proname=propath($udom,$uname);
1717: my $now=time;
1718: unless ($namespace=~/^nohist\_/) {
1719: my $hfh;
1720: if (
1721: $hfh=IO::File->new(">>$proname/$namespace.hist")
1722: ) { print $hfh "P:$now:$rid:$what\n"; }
1723: }
1724: my @pairs=split(/\&/,$what);
1725: my %hash;
1726: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1727: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1728: my $key;
1729: $hash{"version:$rid"}++;
1730: my $version=$hash{"version:$rid"};
1731: my $allkeys='';
1732: foreach my $pair (@pairs) {
1733: my ($key,$value)=split(/=/,$pair);
1734: $allkeys.=$key.':';
1735: $hash{"$version:$rid:$key"}=$value;
1736: }
1737: $hash{"$version:$rid:timestamp"}=$now;
1738: $allkeys.='timestamp';
1739: $hash{"$version:keys:$rid"}=$allkeys;
1740: if (untie(%hash)) {
1741: print $client "ok\n";
1742: } else {
1743: print $client "error: ".($!+0)
1744: ." untie(GDBM) Failed ".
1745: "while attempting store\n";
1746: }
1747: } else {
1748: print $client "error: ".($!+0)
1749: ." tie(GDBM) Failed ".
1750: "while attempting store\n";
1751: }
1752: } else {
1753: print $client "refused\n";
1754: }
1755: # --------------------------------------------------------------------- restore
1756: } elsif ($userinput =~ /^restore/) {
1757: my ($cmd,$udom,$uname,$namespace,$rid)
1758: =split(/:/,$userinput);
1759: $namespace=~s/\//\_/g;
1760: $namespace=~s/\W//g;
1761: chomp($rid);
1762: my $proname=propath($udom,$uname);
1763: my $qresult='';
1764: my %hash;
1765: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1766: my $version=$hash{"version:$rid"};
1767: $qresult.="version=$version&";
1768: my $scope;
1769: for ($scope=1;$scope<=$version;$scope++) {
1770: my $vkeys=$hash{"$scope:keys:$rid"};
1771: my @keys=split(/:/,$vkeys);
1772: my $key;
1773: $qresult.="$scope:keys=$vkeys&";
1774: foreach $key (@keys) {
1775: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1776: }
1777: }
1778: if (untie(%hash)) {
1779: $qresult=~s/\&$//;
1780: print $client "$qresult\n";
1781: } else {
1782: print $client "error: ".($!+0)
1783: ." untie(GDBM) Failed ".
1784: "while attempting restore\n";
1785: }
1786: } else {
1787: print $client "error: ".($!+0)
1788: ." tie(GDBM) Failed ".
1789: "while attempting restore\n";
1790: }
1791: # -------------------------------------------------------------------- chatsend
1792: } elsif ($userinput =~ /^chatsend/) {
1793: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1794: &chatadd($cdom,$cnum,$newpost);
1795: print $client "ok\n";
1796: # -------------------------------------------------------------------- chatretr
1797: } elsif ($userinput =~ /^chatretr/) {
1798: my
1799: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1800: my $reply='';
1801: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1802: $reply.=&escape($_).':';
1803: }
1804: $reply=~s/\:$//;
1805: print $client $reply."\n";
1806: # ------------------------------------------------------------------- querysend
1807: } elsif ($userinput =~ /^querysend/) {
1808: my ($cmd,$query,
1809: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1810: $query=~s/\n*$//g;
1811: print $client "".
1812: sqlreply("$hostid{$clientip}\&$query".
1813: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1814: # ------------------------------------------------------------------ queryreply
1815: } elsif ($userinput =~ /^queryreply/) {
1816: my ($cmd,$id,$reply)=split(/:/,$userinput);
1817: my $store;
1818: my $execdir=$perlvar{'lonDaemons'};
1819: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1820: $reply=~s/\&/\n/g;
1821: print $store $reply;
1822: close $store;
1823: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1824: print $store2 "done\n";
1825: close $store2;
1826: print $client "ok\n";
1827: }
1828: else {
1829: print $client "error: ".($!+0)
1830: ." IO::File->new Failed ".
1831: "while attempting queryreply\n";
1832: }
1833: # ----------------------------------------------------------------- courseidput
1834: } elsif ($userinput =~ /^courseidput/) {
1835: my ($cmd,$udom,$what)=split(/:/,$userinput);
1836: chomp($what);
1837: $udom=~s/\W//g;
1838: my $proname=
1839: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1840: my $now=time;
1841: my @pairs=split(/\&/,$what);
1842: my %hash;
1843: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1844: foreach my $pair (@pairs) {
1845: my ($key,$value)=split(/=/,$pair);
1846: $hash{$key}=$value.':'.$now;
1847: }
1848: if (untie(%hash)) {
1849: print $client "ok\n";
1850: } else {
1851: print $client "error: ".($!+0)
1852: ." untie(GDBM) Failed ".
1853: "while attempting courseidput\n";
1854: }
1855: } else {
1856: print $client "error: ".($!+0)
1857: ." tie(GDBM) Failed ".
1858: "while attempting courseidput\n";
1859: }
1860: # ---------------------------------------------------------------- courseiddump
1861: } elsif ($userinput =~ /^courseiddump/) {
1862: my ($cmd,$udom,$since,$description)
1863: =split(/:/,$userinput);
1864: if (defined($description)) {
1865: $description=&unescape($description);
1866: } else {
1867: $description='.';
1868: }
1869: unless (defined($since)) { $since=0; }
1870: my $qresult='';
1871: my $proname=
1872: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1873: my %hash;
1874: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1875: while (my ($key,$value) = each(%hash)) {
1876: my ($descr,$lasttime)=split(/\:/,$value);
1877: if ($lasttime<$since) { next; }
1878: if ($description eq '.') {
1879: $qresult.=$key.'='.$descr.'&';
1880: } else {
1881: my $unescapeVal = &unescape($descr);
1882: if (eval('$unescapeVal=~/$description/i')) {
1883: $qresult.="$key=$descr&";
1884: }
1885: }
1886: }
1887: if (untie(%hash)) {
1888: chop($qresult);
1889: print $client "$qresult\n";
1890: } else {
1891: print $client "error: ".($!+0)
1892: ." untie(GDBM) Failed ".
1893: "while attempting courseiddump\n";
1894: }
1895: } else {
1896: print $client "error: ".($!+0)
1897: ." tie(GDBM) Failed ".
1898: "while attempting courseiddump\n";
1899: }
1900: # ----------------------------------------------------------------------- idput
1901: } elsif ($userinput =~ /^idput/) {
1902: my ($cmd,$udom,$what)=split(/:/,$userinput);
1903: chomp($what);
1904: $udom=~s/\W//g;
1905: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1906: my $now=time;
1907: {
1908: my $hfh;
1909: if (
1910: $hfh=IO::File->new(">>$proname.hist")
1911: ) { print $hfh "P:$now:$what\n"; }
1912: }
1913: my @pairs=split(/\&/,$what);
1914: my %hash;
1915: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1916: foreach my $pair (@pairs) {
1917: my ($key,$value)=split(/=/,$pair);
1918: $hash{$key}=$value;
1919: }
1920: if (untie(%hash)) {
1921: print $client "ok\n";
1922: } else {
1923: print $client "error: ".($!+0)
1924: ." untie(GDBM) Failed ".
1925: "while attempting idput\n";
1926: }
1927: } else {
1928: print $client "error: ".($!+0)
1929: ." tie(GDBM) Failed ".
1930: "while attempting idput\n";
1931: }
1932: # ----------------------------------------------------------------------- idget
1933: } elsif ($userinput =~ /^idget/) {
1934: my ($cmd,$udom,$what)=split(/:/,$userinput);
1935: chomp($what);
1936: $udom=~s/\W//g;
1937: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1938: my @queries=split(/\&/,$what);
1939: my $qresult='';
1940: my %hash;
1941: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1942: for (my $i=0;$i<=$#queries;$i++) {
1943: $qresult.="$hash{$queries[$i]}&";
1944: }
1945: if (untie(%hash)) {
1946: $qresult=~s/\&$//;
1947: print $client "$qresult\n";
1948: } else {
1949: print $client "error: ".($!+0)
1950: ." untie(GDBM) Failed ".
1951: "while attempting idget\n";
1952: }
1953: } else {
1954: print $client "error: ".($!+0)
1955: ." tie(GDBM) Failed ".
1956: "while attempting idget\n";
1957: }
1958: # ---------------------------------------------------------------------- tmpput
1959: } elsif ($userinput =~ /^tmpput/) {
1960: my ($cmd,$what)=split(/:/,$userinput);
1961: my $store;
1962: $tmpsnum++;
1963: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1964: $id=~s/\W/\_/g;
1965: $what=~s/\n//g;
1966: my $execdir=$perlvar{'lonDaemons'};
1967: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1968: print $store $what;
1969: close $store;
1970: print $client "$id\n";
1971: }
1972: else {
1973: print $client "error: ".($!+0)
1974: ."IO::File->new Failed ".
1975: "while attempting tmpput\n";
1976: }
1977:
1978: # ---------------------------------------------------------------------- tmpget
1979: } elsif ($userinput =~ /^tmpget/) {
1980: my ($cmd,$id)=split(/:/,$userinput);
1981: chomp($id);
1982: $id=~s/\W/\_/g;
1983: my $store;
1984: my $execdir=$perlvar{'lonDaemons'};
1985: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1986: my $reply=<$store>;
1987: print $client "$reply\n";
1988: close $store;
1989: }
1990: else {
1991: print $client "error: ".($!+0)
1992: ."IO::File->new Failed ".
1993: "while attempting tmpget\n";
1994: }
1995:
1996: # ---------------------------------------------------------------------- tmpdel
1997: } elsif ($userinput =~ /^tmpdel/) {
1998: my ($cmd,$id)=split(/:/,$userinput);
1999: chomp($id);
2000: $id=~s/\W/\_/g;
2001: my $execdir=$perlvar{'lonDaemons'};
2002: if (unlink("$execdir/tmp/$id.tmp")) {
2003: print $client "ok\n";
2004: } else {
2005: print $client "error: ".($!+0)
2006: ."Unlink tmp Failed ".
2007: "while attempting tmpdel\n";
2008: }
2009: # -------------------------------------------------------------------------- ls
2010: } elsif ($userinput =~ /^ls/) {
2011: my ($cmd,$ulsdir)=split(/:/,$userinput);
2012: my $ulsout='';
2013: my $ulsfn;
2014: if (-e $ulsdir) {
2015: if(-d $ulsdir) {
2016: if (opendir(LSDIR,$ulsdir)) {
2017: while ($ulsfn=readdir(LSDIR)) {
2018: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2019: $ulsout.=$ulsfn.'&'.
2020: join('&',@ulsstats).':';
2021: }
2022: closedir(LSDIR);
2023: }
2024: } else {
2025: my @ulsstats=stat($ulsdir);
2026: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2027: }
2028: } else {
2029: $ulsout='no_such_dir';
2030: }
2031: if ($ulsout eq '') { $ulsout='empty'; }
2032: print $client "$ulsout\n";
2033: # ----------------------------------------------------------------- setannounce
2034: } elsif ($userinput =~ /^setannounce/) {
2035: my ($cmd,$announcement)=split(/:/,$userinput);
2036: chomp($announcement);
2037: $announcement=&unescape($announcement);
2038: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2039: '/announcement.txt')) {
2040: print $store $announcement;
2041: close $store;
2042: print $client "ok\n";
2043: } else {
2044: print $client "error: ".($!+0)."\n";
2045: }
2046: # ------------------------------------------------------------------ Hanging up
2047: } elsif (($userinput =~ /^exit/) ||
2048: ($userinput =~ /^init/)) {
2049: &logthis(
2050: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
2051: print $client "bye\n";
2052: $client->close();
2053: last;
2054: # ------------------------------------------------------------- unknown command
2055: } elsif ($userinput =~ /^sethost:/) {
2056: print $client &sethost($userinput)."\n";
2057: } elsif ($userinput =~/^version:/) {
2058: print $client &version($userinput)."\n";
2059: } else {
2060: # unknown command
2061: print $client "unknown_cmd\n";
2062: }
2063: # -------------------------------------------------------------------- complete
2064: alarm(0);
2065: &status('Listening to '.$hostid{$clientip});
2066: }
2067: # --------------------------------------------- client unknown or fishy, refuse
2068: } else {
2069: print $client "refused\n";
2070: $client->close();
2071: &logthis("<font color=blue>WARNING: "
2072: ."Rejected client $clientip, closing connection</font>");
2073: }
2074: }
2075:
2076: # =============================================================================
2077:
2078: &logthis("<font color=red>CRITICAL: "
2079: ."Disconnect from $clientip ($hostid{$clientip})</font>");
2080:
2081:
2082: # this exit is VERY important, otherwise the child will become
2083: # a producer of more and more children, forking yourself into
2084: # process death.
2085: exit;
2086:
2087: }
2088:
2089:
2090: #
2091: # Checks to see if the input roleput request was to set
2092: # an author role. If so, invokes the lchtmldir script to set
2093: # up a correct public_html
2094: # Parameters:
2095: # request - The request sent to the rolesput subchunk.
2096: # We're looking for /domain/_au
2097: # domain - The domain in which the user is having roles doctored.
2098: # user - Name of the user for which the role is being put.
2099: # authtype - The authentication type associated with the user.
2100: #
2101: sub ManagePermissions
2102: {
2103: my $request = shift;
2104: my $domain = shift;
2105: my $user = shift;
2106: my $authtype= shift;
2107:
2108: # See if the request is of the form /$domain/_au
2109: &logthis("ruequest is $request");
2110: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2111: my $execdir = $perlvar{'lonDaemons'};
2112: my $userhome= "/home/$user" ;
2113: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2114: system("$execdir/lchtmldir $userhome $user $authtype");
2115: }
2116: }
2117: #
2118: # GetAuthType - Determines the authorization type of a user in a domain.
2119:
2120: # Returns the authorization type or nouser if there is no such user.
2121: #
2122: sub GetAuthType
2123: {
2124: my $domain = shift;
2125: my $user = shift;
2126:
2127: Debug("GetAuthType( $domain, $user ) \n");
2128: my $proname = &propath($domain, $user);
2129: my $passwdfile = "$proname/passwd";
2130: if( -e $passwdfile ) {
2131: my $pf = IO::File->new($passwdfile);
2132: my $realpassword = <$pf>;
2133: chomp($realpassword);
2134: Debug("Password info = $realpassword\n");
2135: my ($authtype, $contentpwd) = split(/:/, $realpassword);
2136: Debug("Authtype = $authtype, content = $contentpwd\n");
2137: my $availinfo = '';
2138: if($authtype eq 'krb4' or $authtype eq 'krb5') {
2139: $availinfo = $contentpwd;
2140: }
2141:
2142: return "$authtype:$availinfo";
2143: }
2144: else {
2145: Debug("Returning nouser");
2146: return "nouser";
2147: }
2148: }
2149:
2150: sub addline {
2151: my ($fname,$hostid,$ip,$newline)=@_;
2152: my $contents;
2153: my $found=0;
2154: my $expr='^'.$hostid.':'.$ip.':';
2155: $expr =~ s/\./\\\./g;
2156: my $sh;
2157: if ($sh=IO::File->new("$fname.subscription")) {
2158: while (my $subline=<$sh>) {
2159: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2160: }
2161: $sh->close();
2162: }
2163: $sh=IO::File->new(">$fname.subscription");
2164: if ($contents) { print $sh $contents; }
2165: if ($newline) { print $sh $newline; }
2166: $sh->close();
2167: return $found;
2168: }
2169:
2170: sub getchat {
2171: my ($cdom,$cname,$udom,$uname)=@_;
2172: my %hash;
2173: my $proname=&propath($cdom,$cname);
2174: my @entries=();
2175: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2176: &GDBM_READER(),0640)) {
2177: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2178: untie %hash;
2179: }
2180: my @participants=();
2181: my $cutoff=time-60;
2182: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2183: &GDBM_WRCREAT(),0640)) {
2184: $hash{$uname.':'.$udom}=time;
2185: foreach (sort keys %hash) {
2186: if ($hash{$_}>$cutoff) {
2187: $participants[$#participants+1]='active_participant:'.$_;
2188: }
2189: }
2190: untie %hash;
2191: }
2192: return (@participants,@entries);
2193: }
2194:
2195: sub chatadd {
2196: my ($cdom,$cname,$newchat)=@_;
2197: my %hash;
2198: my $proname=&propath($cdom,$cname);
2199: my @entries=();
2200: my $time=time;
2201: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2202: &GDBM_WRCREAT(),0640)) {
2203: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2204: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2205: my ($thentime,$idnum)=split(/\_/,$lastid);
2206: my $newid=$time.'_000000';
2207: if ($thentime==$time) {
2208: $idnum=~s/^0+//;
2209: $idnum++;
2210: $idnum=substr('000000'.$idnum,-6,6);
2211: $newid=$time.'_'.$idnum;
2212: }
2213: $hash{$newid}=$newchat;
2214: my $expired=$time-3600;
2215: foreach (keys %hash) {
2216: my ($thistime)=($_=~/(\d+)\_/);
2217: if ($thistime<$expired) {
2218: delete $hash{$_};
2219: }
2220: }
2221: untie %hash;
2222: }
2223: {
2224: my $hfh;
2225: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2226: print $hfh "$time:".&unescape($newchat)."\n";
2227: }
2228: }
2229: }
2230:
2231: sub unsub {
2232: my ($fname,$clientip)=@_;
2233: my $result;
2234: if (unlink("$fname.$hostid{$clientip}")) {
2235: $result="ok\n";
2236: } else {
2237: $result="not_subscribed\n";
2238: }
2239: if (-e "$fname.subscription") {
2240: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
2241: if ($found) { $result="ok\n"; }
2242: } else {
2243: if ($result != "ok\n") { $result="not_subscribed\n"; }
2244: }
2245: return $result;
2246: }
2247:
2248: sub currentversion {
2249: my $fname=shift;
2250: my $version=-1;
2251: my $ulsdir='';
2252: if ($fname=~/^(.+)\/[^\/]+$/) {
2253: $ulsdir=$1;
2254: }
2255: my ($fnamere1,$fnamere2);
2256: # remove version if already specified
2257: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
2258: # get the bits that go before and after the version number
2259: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
2260: $fnamere1=$1;
2261: $fnamere2='.'.$2;
2262: }
2263: if (-e $fname) { $version=1; }
2264: if (-e $ulsdir) {
2265: if(-d $ulsdir) {
2266: if (opendir(LSDIR,$ulsdir)) {
2267: my $ulsfn;
2268: while ($ulsfn=readdir(LSDIR)) {
2269: # see if this is a regular file (ignore links produced earlier)
2270: my $thisfile=$ulsdir.'/'.$ulsfn;
2271: unless (-l $thisfile) {
2272: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
2273: if ($1>$version) { $version=$1; }
2274: }
2275: }
2276: }
2277: closedir(LSDIR);
2278: $version++;
2279: }
2280: }
2281: }
2282: return $version;
2283: }
2284:
2285: sub thisversion {
2286: my $fname=shift;
2287: my $version=-1;
2288: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
2289: $version=$1;
2290: }
2291: return $version;
2292: }
2293:
2294: sub subscribe {
2295: my ($userinput,$clientip)=@_;
2296: my $result;
2297: my ($cmd,$fname)=split(/:/,$userinput);
2298: my $ownership=&ishome($fname);
2299: if ($ownership eq 'owner') {
2300: # explitly asking for the current version?
2301: unless (-e $fname) {
2302: my $currentversion=¤tversion($fname);
2303: if (&thisversion($fname)==$currentversion) {
2304: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
2305: my $root=$1;
2306: my $extension=$2;
2307: symlink($root.'.'.$extension,
2308: $root.'.'.$currentversion.'.'.$extension);
2309: unless ($extension=~/\.meta$/) {
2310: symlink($root.'.'.$extension.'.meta',
2311: $root.'.'.$currentversion.'.'.$extension.'.meta');
2312: }
2313: }
2314: }
2315: }
2316: if (-e $fname) {
2317: if (-d $fname) {
2318: $result="directory\n";
2319: } else {
2320: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
2321: my $now=time;
2322: my $found=&addline($fname,$hostid{$clientip},$clientip,
2323: "$hostid{$clientip}:$clientip:$now\n");
2324: if ($found) { $result="$fname\n"; }
2325: # if they were subscribed to only meta data, delete that
2326: # subscription, when you subscribe to a file you also get
2327: # the metadata
2328: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
2329: $fname=~s/\/home\/httpd\/html\/res/raw/;
2330: $fname="http://$thisserver/".$fname;
2331: $result="$fname\n";
2332: }
2333: } else {
2334: $result="not_found\n";
2335: }
2336: } else {
2337: $result="rejected\n";
2338: }
2339: return $result;
2340: }
2341:
2342: sub make_passwd_file {
2343: my ($uname, $umode,$npass,$passfilename)=@_;
2344: my $result="ok\n";
2345: if ($umode eq 'krb4' or $umode eq 'krb5') {
2346: {
2347: my $pf = IO::File->new(">$passfilename");
2348: print $pf "$umode:$npass\n";
2349: }
2350: } elsif ($umode eq 'internal') {
2351: my $salt=time;
2352: $salt=substr($salt,6,2);
2353: my $ncpass=crypt($npass,$salt);
2354: {
2355: &Debug("Creating internal auth");
2356: my $pf = IO::File->new(">$passfilename");
2357: print $pf "internal:$ncpass\n";
2358: }
2359: } elsif ($umode eq 'localauth') {
2360: {
2361: my $pf = IO::File->new(">$passfilename");
2362: print $pf "localauth:$npass\n";
2363: }
2364: } elsif ($umode eq 'unix') {
2365: {
2366: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2367: {
2368: &Debug("Executing external: ".$execpath);
2369: &Debug("user = ".$uname.", Password =". $npass);
2370: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2371: print $se "$uname\n";
2372: print $se "$npass\n";
2373: print $se "$npass\n";
2374: }
2375: my $useraddok = $?;
2376: if($useraddok > 0) {
2377: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2378: }
2379: my $pf = IO::File->new(">$passfilename");
2380: print $pf "unix:\n";
2381: }
2382: } elsif ($umode eq 'none') {
2383: {
2384: my $pf = IO::File->new(">$passfilename");
2385: print $pf "none:\n";
2386: }
2387: } else {
2388: $result="auth_mode_error\n";
2389: }
2390: return $result;
2391: }
2392:
2393: sub sethost {
2394: my ($remotereq) = @_;
2395: my (undef,$hostid)=split(/:/,$remotereq);
2396: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2397: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2398: $currenthostid=$hostid;
2399: $currentdomainid=$hostdom{$hostid};
2400: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2401: } else {
2402: &logthis("Requested host id $hostid not an alias of ".
2403: $perlvar{'lonHostID'}." refusing connection");
2404: return 'unable_to_set';
2405: }
2406: return 'ok';
2407: }
2408:
2409: sub version {
2410: my ($userinput)=@_;
2411: $remoteVERSION=(split(/:/,$userinput))[1];
2412: return "version:$VERSION";
2413: }
2414:
2415: #There is a copy of this in lonnet.pm
2416: sub userload {
2417: my $numusers=0;
2418: {
2419: opendir(LONIDS,$perlvar{'lonIDsDir'});
2420: my $filename;
2421: my $curtime=time;
2422: while ($filename=readdir(LONIDS)) {
2423: if ($filename eq '.' || $filename eq '..') {next;}
2424: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2425: if ($curtime-$mtime < 3600) { $numusers++; }
2426: }
2427: closedir(LONIDS);
2428: }
2429: my $userloadpercent=0;
2430: my $maxuserload=$perlvar{'lonUserLoadLim'};
2431: if ($maxuserload) {
2432: $userloadpercent=100*$numusers/$maxuserload;
2433: }
2434: $userloadpercent=sprintf("%.2f",$userloadpercent);
2435: return $userloadpercent;
2436: }
2437:
2438: # ----------------------------------- POD (plain old documentation, CPAN style)
2439:
2440: =head1 NAME
2441:
2442: lond - "LON Daemon" Server (port "LOND" 5663)
2443:
2444: =head1 SYNOPSIS
2445:
2446: Usage: B<lond>
2447:
2448: Should only be run as user=www. This is a command-line script which
2449: is invoked by B<loncron>. There is no expectation that a typical user
2450: will manually start B<lond> from the command-line. (In other words,
2451: DO NOT START B<lond> YOURSELF.)
2452:
2453: =head1 DESCRIPTION
2454:
2455: There are two characteristics associated with the running of B<lond>,
2456: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2457: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2458: subscriptions, etc). These are described in two large
2459: sections below.
2460:
2461: B<PROCESS MANAGEMENT>
2462:
2463: Preforker - server who forks first. Runs as a daemon. HUPs.
2464: Uses IDEA encryption
2465:
2466: B<lond> forks off children processes that correspond to the other servers
2467: in the network. Management of these processes can be done at the
2468: parent process level or the child process level.
2469:
2470: B<logs/lond.log> is the location of log messages.
2471:
2472: The process management is now explained in terms of linux shell commands,
2473: subroutines internal to this code, and signal assignments:
2474:
2475: =over 4
2476:
2477: =item *
2478:
2479: PID is stored in B<logs/lond.pid>
2480:
2481: This is the process id number of the parent B<lond> process.
2482:
2483: =item *
2484:
2485: SIGTERM and SIGINT
2486:
2487: Parent signal assignment:
2488: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2489:
2490: Child signal assignment:
2491: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2492: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2493: to restart a new child.)
2494:
2495: Command-line invocations:
2496: B<kill> B<-s> SIGTERM I<PID>
2497: B<kill> B<-s> SIGINT I<PID>
2498:
2499: Subroutine B<HUNTSMAN>:
2500: This is only invoked for the B<lond> parent I<PID>.
2501: This kills all the children, and then the parent.
2502: The B<lonc.pid> file is cleared.
2503:
2504: =item *
2505:
2506: SIGHUP
2507:
2508: Current bug:
2509: This signal can only be processed the first time
2510: on the parent process. Subsequent SIGHUP signals
2511: have no effect.
2512:
2513: Parent signal assignment:
2514: $SIG{HUP} = \&HUPSMAN;
2515:
2516: Child signal assignment:
2517: none (nothing happens)
2518:
2519: Command-line invocations:
2520: B<kill> B<-s> SIGHUP I<PID>
2521:
2522: Subroutine B<HUPSMAN>:
2523: This is only invoked for the B<lond> parent I<PID>,
2524: This kills all the children, and then the parent.
2525: The B<lond.pid> file is cleared.
2526:
2527: =item *
2528:
2529: SIGUSR1
2530:
2531: Parent signal assignment:
2532: $SIG{USR1} = \&USRMAN;
2533:
2534: Child signal assignment:
2535: $SIG{USR1}= \&logstatus;
2536:
2537: Command-line invocations:
2538: B<kill> B<-s> SIGUSR1 I<PID>
2539:
2540: Subroutine B<USRMAN>:
2541: When invoked for the B<lond> parent I<PID>,
2542: SIGUSR1 is sent to all the children, and the status of
2543: each connection is logged.
2544:
2545: =item *
2546:
2547: SIGUSR2
2548:
2549: Parent Signal assignment:
2550: $SIG{USR2} = \&UpdateHosts
2551:
2552: Child signal assignment:
2553: NONE
2554:
2555:
2556: =item *
2557:
2558: SIGCHLD
2559:
2560: Parent signal assignment:
2561: $SIG{CHLD} = \&REAPER;
2562:
2563: Child signal assignment:
2564: none
2565:
2566: Command-line invocations:
2567: B<kill> B<-s> SIGCHLD I<PID>
2568:
2569: Subroutine B<REAPER>:
2570: This is only invoked for the B<lond> parent I<PID>.
2571: Information pertaining to the child is removed.
2572: The socket port is cleaned up.
2573:
2574: =back
2575:
2576: B<SERVER-SIDE ACTIVITIES>
2577:
2578: Server-side information can be accepted in an encrypted or non-encrypted
2579: method.
2580:
2581: =over 4
2582:
2583: =item ping
2584:
2585: Query a client in the hosts.tab table; "Are you there?"
2586:
2587: =item pong
2588:
2589: Respond to a ping query.
2590:
2591: =item ekey
2592:
2593: Read in encrypted key, make cipher. Respond with a buildkey.
2594:
2595: =item load
2596:
2597: Respond with CPU load based on a computation upon /proc/loadavg.
2598:
2599: =item currentauth
2600:
2601: Reply with current authentication information (only over an
2602: encrypted channel).
2603:
2604: =item auth
2605:
2606: Only over an encrypted channel, reply as to whether a user's
2607: authentication information can be validated.
2608:
2609: =item passwd
2610:
2611: Allow for a password to be set.
2612:
2613: =item makeuser
2614:
2615: Make a user.
2616:
2617: =item passwd
2618:
2619: Allow for authentication mechanism and password to be changed.
2620:
2621: =item home
2622:
2623: Respond to a question "are you the home for a given user?"
2624:
2625: =item update
2626:
2627: Update contents of a subscribed resource.
2628:
2629: =item unsubscribe
2630:
2631: The server is unsubscribing from a resource.
2632:
2633: =item subscribe
2634:
2635: The server is subscribing to a resource.
2636:
2637: =item log
2638:
2639: Place in B<logs/lond.log>
2640:
2641: =item put
2642:
2643: stores hash in namespace
2644:
2645: =item rolesput
2646:
2647: put a role into a user's environment
2648:
2649: =item get
2650:
2651: returns hash with keys from array
2652: reference filled in from namespace
2653:
2654: =item eget
2655:
2656: returns hash with keys from array
2657: reference filled in from namesp (encrypts the return communication)
2658:
2659: =item rolesget
2660:
2661: get a role from a user's environment
2662:
2663: =item del
2664:
2665: deletes keys out of array from namespace
2666:
2667: =item keys
2668:
2669: returns namespace keys
2670:
2671: =item dump
2672:
2673: dumps the complete (or key matching regexp) namespace into a hash
2674:
2675: =item store
2676:
2677: stores hash permanently
2678: for this url; hashref needs to be given and should be a \%hashname; the
2679: remaining args aren't required and if they aren't passed or are '' they will
2680: be derived from the ENV
2681:
2682: =item restore
2683:
2684: returns a hash for a given url
2685:
2686: =item querysend
2687:
2688: Tells client about the lonsql process that has been launched in response
2689: to a sent query.
2690:
2691: =item queryreply
2692:
2693: Accept information from lonsql and make appropriate storage in temporary
2694: file space.
2695:
2696: =item idput
2697:
2698: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2699: for each student, defined perhaps by the institutional Registrar.)
2700:
2701: =item idget
2702:
2703: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2704: for each student, defined perhaps by the institutional Registrar.)
2705:
2706: =item tmpput
2707:
2708: Accept and store information in temporary space.
2709:
2710: =item tmpget
2711:
2712: Send along temporarily stored information.
2713:
2714: =item ls
2715:
2716: List part of a user's directory.
2717:
2718: =item pushtable
2719:
2720: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
2721: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
2722: must be restored manually in case of a problem with the new table file.
2723: pushtable requires that the request be encrypted and validated via
2724: ValidateManager. The form of the command is:
2725: enc:pushtable tablename <tablecontents> \n
2726: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
2727: cleartext newline.
2728:
2729: =item Hanging up (exit or init)
2730:
2731: What to do when a client tells the server that they (the client)
2732: are leaving the network.
2733:
2734: =item unknown command
2735:
2736: If B<lond> is sent an unknown command (not in the list above),
2737: it replys to the client "unknown_cmd".
2738:
2739:
2740: =item UNKNOWN CLIENT
2741:
2742: If the anti-spoofing algorithm cannot verify the client,
2743: the client is rejected (with a "refused" message sent
2744: to the client, and the connection is closed.
2745:
2746: =back
2747:
2748: =head1 PREREQUISITES
2749:
2750: IO::Socket
2751: IO::File
2752: Apache::File
2753: Symbol
2754: POSIX
2755: Crypt::IDEA
2756: LWP::UserAgent()
2757: GDBM_File
2758: Authen::Krb4
2759: Authen::Krb5
2760:
2761: =head1 COREQUISITES
2762:
2763: =head1 OSNAMES
2764:
2765: linux
2766:
2767: =head1 SCRIPT CATEGORIES
2768:
2769: Server/Process
2770:
2771: =cut
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