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Tue Sep 23 11:23:31 2003 UTC (20 years, 7 months ago) by
foxr
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Comlplete implementation of reinit functionality. Must still implement
the actual initialization functionality, but the process can now
receive the request and either invoke the appropriate internal function or
signal the correct lonc.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.147 2003/09/23 11:23:31 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 1.147 2003/09/23 11:23:31 foxr
64: # Comlplete implementation of reinit functionality. Must still implement
65: # the actual initialization functionality, but the process can now
66: # receive the request and either invoke the appropriate internal function or
67: # signal the correct lonc.
68: #
69: # Revision 1.146 2003/09/16 10:28:14 foxr
70: # ReinitProcess - decode the process selector and produce the associated pid
71: # filename. Note: While it is possible to test that valid process selectors are
72: # handled properly I am not able to test that invalid process selectors produce
73: # the appropriate error as lonManage also blocks the use of invalid process selectors.
74: #
75: # Revision 1.145 2003/09/16 10:13:20 foxr
76: # Added ReinitProcess function to oversee the parsing and processing of the
77: # reinit:<process> client request.
78: #
79: # Revision 1.144 2003/09/16 09:47:01 foxr
80: # Added skeletal support for SIGUSR2 (update hosts.tab)
81: #
82: # Revision 1.143 2003/09/15 10:03:52 foxr
83: # Completed and tested code for pushfile.
84: #
85: # Revision 1.142 2003/09/09 20:47:46 www
86: # Permanently store chatroom entries in chatroom.log
87: #
88: # Revision 1.141 2003/09/08 10:32:07 foxr
89: # Added PushFile sub This sub oversees the push of a new configuration table file
90: # Currently supported files are:
91: # - hosts.tab (transaction pushfile:hosts:contents)
92: # - domain.tab (transaction pushfile:domain:contents)
93: #
94:
95:
96: use strict;
97: use lib '/home/httpd/lib/perl/';
98: use LONCAPA::Configuration;
99:
100: use IO::Socket;
101: use IO::File;
102: #use Apache::File;
103: use Symbol;
104: use POSIX;
105: use Crypt::IDEA;
106: use LWP::UserAgent();
107: use GDBM_File;
108: use Authen::Krb4;
109: use Authen::Krb5;
110: use lib '/home/httpd/lib/perl/';
111: use localauth;
112: use File::Copy;
113:
114: my $DEBUG = 0; # Non zero to enable debug log entries.
115:
116: my $status='';
117: my $lastlog='';
118:
119: my $VERSION='$Revision: 1.147 $'; #' stupid emacs
120: my $remoteVERSION;
121: my $currenthostid;
122: my $currentdomainid;
123:
124: my $client;
125: my $clientip;
126:
127: my $server;
128: my $thisserver;
129:
130: my %hostid;
131: my %hostdom;
132: my %hostip;
133: my %perlvar; # Will have the apache conf defined perl vars.
134:
135: #
136: # The array below are password error strings."
137: #
138: my $lastpwderror = 13; # Largest error number from lcpasswd.
139: my @passwderrors = ("ok",
140: "lcpasswd must be run as user 'www'",
141: "lcpasswd got incorrect number of arguments",
142: "lcpasswd did not get the right nubmer of input text lines",
143: "lcpasswd too many simultaneous pwd changes in progress",
144: "lcpasswd User does not exist.",
145: "lcpasswd Incorrect current passwd",
146: "lcpasswd Unable to su to root.",
147: "lcpasswd Cannot set new passwd.",
148: "lcpasswd Username has invalid characters",
149: "lcpasswd Invalid characters in password",
150: "11", "12",
151: "lcpasswd Password mismatch");
152:
153:
154: # The array below are lcuseradd error strings.:
155:
156: my $lastadderror = 13;
157: my @adderrors = ("ok",
158: "User ID mismatch, lcuseradd must run as user www",
159: "lcuseradd Incorrect number of command line parameters must be 3",
160: "lcuseradd Incorrect number of stdinput lines, must be 3",
161: "lcuseradd Too many other simultaneous pwd changes in progress",
162: "lcuseradd User does not exist",
163: "lcuseradd Unabel to mak ewww member of users's group",
164: "lcuseradd Unable to su to root",
165: "lcuseradd Unable to set password",
166: "lcuseradd Usrname has invbalid charcters",
167: "lcuseradd Password has an invalid character",
168: "lcuseradd User already exists",
169: "lcuseradd Could not add user.",
170: "lcuseradd Password mismatch");
171:
172:
173: #
174: # GetCertificate: Given a transaction that requires a certificate,
175: # this function will extract the certificate from the transaction
176: # request. Note that at this point, the only concept of a certificate
177: # is the hostname to which we are connected.
178: #
179: # Parameter:
180: # request - The request sent by our client (this parameterization may
181: # need to change when we really use a certificate granting
182: # authority.
183: #
184: sub GetCertificate {
185: my $request = shift;
186:
187: return $clientip;
188: }
189:
190:
191: #
192: # ValidManager: Determines if a given certificate represents a valid manager.
193: # in this primitive implementation, the 'certificate' is
194: # just the connecting loncapa client name. This is checked
195: # against a valid client list in the configuration.
196: #
197: #
198: sub ValidManager {
199: my $certificate = shift;
200:
201: my $hostentry = $hostid{$certificate};
202: if ($hostentry ne undef) {
203: &logthis('<font color="yellow">Authenticating manager'.
204: " $hostentry</font>");
205: return 1;
206: } else {
207: &logthis('<font color="red"> Failed manager authentication '.
208: "$certificate </font>");
209: }
210: }
211: #
212: # CopyFile: Called as part of the process of installing a
213: # new configuration file. This function copies an existing
214: # file to a backup file.
215: # Parameters:
216: # oldfile - Name of the file to backup.
217: # newfile - Name of the backup file.
218: # Return:
219: # 0 - Failure (errno has failure reason).
220: # 1 - Success.
221: #
222: sub CopyFile {
223: my $oldfile = shift;
224: my $newfile = shift;
225:
226: # The file must exist:
227:
228: if(-e $oldfile) {
229:
230: # Read the old file.
231:
232: my $oldfh = IO::File->new("< $oldfile");
233: if(!$oldfh) {
234: return 0;
235: }
236: my @contents = <$oldfh>; # Suck in the entire file.
237:
238: # write the backup file:
239:
240: my $newfh = IO::File->new("> $newfile");
241: if(!(defined $newfh)){
242: return 0;
243: }
244: my $lines = scalar @contents;
245: for (my $i =0; $i < $lines; $i++) {
246: print $newfh ($contents[$i]);
247: }
248:
249: $oldfh->close;
250: $newfh->close;
251:
252: chmod(0660, $newfile);
253:
254: return 1;
255:
256: } else {
257: return 0;
258: }
259: }
260:
261: #
262: # InstallFile: Called to install an administrative file:
263: # - The file is created with <name>.tmp
264: # - The <name>.tmp file is then mv'd to <name>
265: # This lugubrious procedure is done to ensure that we are never without
266: # a valid, even if dated, version of the file regardless of who crashes
267: # and when the crash occurs.
268: #
269: # Parameters:
270: # Name of the file
271: # File Contents.
272: # Return:
273: # nonzero - success.
274: # 0 - failure and $! has an errno.
275: #
276: sub InstallFile {
277: my $Filename = shift;
278: my $Contents = shift;
279: my $TempFile = $Filename.".tmp";
280:
281: # Open the file for write:
282:
283: my $fh = IO::File->new("> $TempFile"); # Write to temp.
284: if(!(defined $fh)) {
285: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
286: return 0;
287: }
288: # write the contents of the file:
289:
290: print $fh ($Contents);
291: $fh->close; # In case we ever have a filesystem w. locking
292:
293: chmod(0660, $TempFile);
294:
295: # Now we can move install the file in position.
296:
297: move($TempFile, $Filename);
298:
299: return 1;
300: }
301:
302: #
303: # PushFile: Called to do an administrative push of a file.
304: # - Ensure the file being pushed is one we support.
305: # - Backup the old file to <filename.saved>
306: # - Separate the contents of the new file out from the
307: # rest of the request.
308: # - Write the new file.
309: # Parameter:
310: # Request - The entire user request. This consists of a : separated
311: # string pushfile:tablename:contents.
312: # NOTE: The contents may have :'s in it as well making things a bit
313: # more interesting... but not much.
314: # Returns:
315: # String to send to client ("ok" or "refused" if bad file).
316: #
317: sub PushFile {
318: my $request = shift;
319: my ($command, $filename, $contents) = split(":", $request, 3);
320:
321: # At this point in time, pushes for only the following tables are
322: # supported:
323: # hosts.tab ($filename eq host).
324: # domain.tab ($filename eq domain).
325: # Construct the destination filename or reject the request.
326: #
327: # lonManage is supposed to ensure this, however this session could be
328: # part of some elaborate spoof that managed somehow to authenticate.
329: #
330:
331: my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
332: if ($filename eq "host") {
333: $tablefile .= "hosts.tab";
334: } elsif ($filename eq "domain") {
335: $tablefile .= "domain.tab";
336: } else {
337: return "refused";
338: }
339: #
340: # >copy< the old table to the backup table
341: # don't rename in case system crashes/reboots etc. in the time
342: # window between a rename and write.
343: #
344: my $backupfile = $tablefile;
345: $backupfile =~ s/\.tab$/.old/;
346: if(!CopyFile($tablefile, $backupfile)) {
347: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
348: return "error:$!";
349: }
350: &logthis('<font color="green"> Pushfile: backed up '
351: .$tablefile." to $backupfile</font>");
352:
353: # Install the new file:
354:
355: if(!InstallFile($tablefile, $contents)) {
356: &logthis('<font color="red"> Pushfile: unable to install '
357: .$tablefile." $! </font>");
358: return "error:$!";
359: }
360: else {
361: &logthis('<font color="green"> Installed new '.$tablefile
362: ."</font>");
363:
364: }
365:
366:
367: # Indicate success:
368:
369: return "ok";
370:
371: }
372:
373: #
374: # Called to re-init either lonc or lond.
375: #
376: # Parameters:
377: # request - The full request by the client. This is of the form
378: # reinit:<process>
379: # where <process> is allowed to be either of
380: # lonc or lond
381: #
382: # Returns:
383: # The string to be sent back to the client either:
384: # ok - Everything worked just fine.
385: # error:why - There was a failure and why describes the reason.
386: #
387: #
388: sub ReinitProcess {
389: my $request = shift;
390:
391:
392: # separate the request (reinit) from the process identifier and
393: # validate it producing the name of the .pid file for the process.
394: #
395: #
396: my ($junk, $process) = split(":", $request);
397: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
398: if($process eq 'lonc') {
399: $processpidfile = $processpidfile."lonc.pid";
400: if (!open(PIDFILE, "< $processpidfile")) {
401: return "error:Open failed for $processpidfile";
402: }
403: my $loncpid = <PIDFILE>;
404: close(PIDFILE);
405: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
406: ."</font>");
407: kill("USR2", $loncpid);
408: } elsif ($process eq 'lond') {
409: logthis('<font color="red"> Reinitializing self (lond) </font>');
410: &UpdateHosts; # Lond is us!!
411: } else {
412: &logthis('<font color="yellow" Invalid reinit request for '.$process
413: ."</font>");
414: return "error:Invalid process identifier $process";
415: }
416: return 'ok';
417: }
418:
419: #
420: # Convert an error return code from lcpasswd to a string value.
421: #
422: sub lcpasswdstrerror {
423: my $ErrorCode = shift;
424: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
425: return "lcpasswd Unrecognized error return value ".$ErrorCode;
426: } else {
427: return $passwderrors[$ErrorCode];
428: }
429: }
430:
431: #
432: # Convert an error return code from lcuseradd to a string value:
433: #
434: sub lcuseraddstrerror {
435: my $ErrorCode = shift;
436: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
437: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
438: } else {
439: return $adderrors[$ErrorCode];
440: }
441: }
442:
443: # grabs exception and records it to log before exiting
444: sub catchexception {
445: my ($error)=@_;
446: $SIG{'QUIT'}='DEFAULT';
447: $SIG{__DIE__}='DEFAULT';
448: &logthis("<font color=red>CRITICAL: "
449: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
450: ."a crash with this error msg->[$error]</font>");
451: &logthis('Famous last words: '.$status.' - '.$lastlog);
452: if ($client) { print $client "error: $error\n"; }
453: $server->close();
454: die($error);
455: }
456:
457: sub timeout {
458: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
459: &catchexception('Timeout');
460: }
461: # -------------------------------- Set signal handlers to record abnormal exits
462:
463: $SIG{'QUIT'}=\&catchexception;
464: $SIG{__DIE__}=\&catchexception;
465:
466: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
467: &status("Read loncapa.conf and loncapa_apache.conf");
468: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
469: %perlvar=%{$perlvarref};
470: undef $perlvarref;
471:
472: # ----------------------------- Make sure this process is running from user=www
473: my $wwwid=getpwnam('www');
474: if ($wwwid!=$<) {
475: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
476: my $subj="LON: $currenthostid User ID mismatch";
477: system("echo 'User ID mismatch. lond must be run as user www.' |\
478: mailto $emailto -s '$subj' > /dev/null");
479: exit 1;
480: }
481:
482: # --------------------------------------------- Check if other instance running
483:
484: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
485:
486: if (-e $pidfile) {
487: my $lfh=IO::File->new("$pidfile");
488: my $pide=<$lfh>;
489: chomp($pide);
490: if (kill 0 => $pide) { die "already running"; }
491: }
492:
493: # ------------------------------------------------------------- Read hosts file
494:
495: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
496:
497: while (my $configline=<CONFIG>) {
498: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
499: chomp($ip); $ip=~s/\D+$//;
500: $hostid{$ip}=$id;
501: $hostdom{$id}=$domain;
502: $hostip{$id}=$ip;
503: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
504: }
505: close(CONFIG);
506:
507: # establish SERVER socket, bind and listen.
508: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
509: Type => SOCK_STREAM,
510: Proto => 'tcp',
511: Reuse => 1,
512: Listen => 10 )
513: or die "making socket: $@\n";
514:
515: # --------------------------------------------------------- Do global variables
516:
517: # global variables
518:
519: my %children = (); # keys are current child process IDs
520: my $children = 0; # current number of children
521:
522: sub REAPER { # takes care of dead children
523: $SIG{CHLD} = \&REAPER;
524: my $pid = wait;
525: if (defined($children{$pid})) {
526: &logthis("Child $pid died");
527: $children --;
528: delete $children{$pid};
529: } else {
530: &logthis("Unknown Child $pid died");
531: }
532: }
533:
534: sub HUNTSMAN { # signal handler for SIGINT
535: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
536: kill 'INT' => keys %children;
537: &logthis("Free socket: ".shutdown($server,2)); # free up socket
538: my $execdir=$perlvar{'lonDaemons'};
539: unlink("$execdir/logs/lond.pid");
540: &logthis("<font color=red>CRITICAL: Shutting down</font>");
541: exit; # clean up with dignity
542: }
543:
544: sub HUPSMAN { # signal handler for SIGHUP
545: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
546: kill 'INT' => keys %children;
547: &logthis("Free socket: ".shutdown($server,2)); # free up socket
548: &logthis("<font color=red>CRITICAL: Restarting</font>");
549: my $execdir=$perlvar{'lonDaemons'};
550: unlink("$execdir/logs/lond.pid");
551: exec("$execdir/lond"); # here we go again
552: }
553:
554: #
555: # Called in response to a USR2 signal.
556: # - Reread hosts.tab
557: # - All children connected to hosts that were removed from hosts.tab
558: # are killed via SIGINT
559: # - All children connected to previously existing hosts are sent SIGUSR1
560: # - Our internal hosts hash is updated to reflect the new contents of
561: # hosts.tab causing connections from hosts added to hosts.tab to
562: # now be honored.
563: #
564: sub UpdateHosts {
565: logthis('<font color="blue"> Updating connections </font>');
566: }
567:
568: sub checkchildren {
569: &initnewstatus();
570: &logstatus();
571: &logthis('Going to check on the children');
572: my $docdir=$perlvar{'lonDocRoot'};
573: foreach (sort keys %children) {
574: sleep 1;
575: unless (kill 'USR1' => $_) {
576: &logthis ('Child '.$_.' is dead');
577: &logstatus($$.' is dead');
578: }
579: }
580: sleep 5;
581: $SIG{ALRM} = sub { die "timeout" };
582: $SIG{__DIE__} = 'DEFAULT';
583: foreach (sort keys %children) {
584: unless (-e "$docdir/lon-status/londchld/$_.txt") {
585: eval {
586: alarm(300);
587: &logthis('Child '.$_.' did not respond');
588: kill 9 => $_;
589: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
590: #$subj="LON: $currenthostid killed lond process $_";
591: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
592: #$execdir=$perlvar{'lonDaemons'};
593: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
594: alarm(0);
595: }
596: }
597: }
598: $SIG{ALRM} = 'DEFAULT';
599: $SIG{__DIE__} = \&cathcexception;
600: }
601:
602: # --------------------------------------------------------------------- Logging
603:
604: sub logthis {
605: my $message=shift;
606: my $execdir=$perlvar{'lonDaemons'};
607: my $fh=IO::File->new(">>$execdir/logs/lond.log");
608: my $now=time;
609: my $local=localtime($now);
610: $lastlog=$local.': '.$message;
611: print $fh "$local ($$): $message\n";
612: }
613:
614: # ------------------------- Conditional log if $DEBUG true.
615: sub Debug {
616: my $message = shift;
617: if($DEBUG) {
618: &logthis($message);
619: }
620: }
621: # ------------------------------------------------------------------ Log status
622:
623: sub logstatus {
624: my $docdir=$perlvar{'lonDocRoot'};
625: {
626: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
627: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
628: $fh->close();
629: }
630: {
631: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
632: print $fh $status."\n".$lastlog."\n".time;
633: $fh->close();
634: }
635: }
636:
637: sub initnewstatus {
638: my $docdir=$perlvar{'lonDocRoot'};
639: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
640: my $now=time;
641: my $local=localtime($now);
642: print $fh "LOND status $local - parent $$\n\n";
643: opendir(DIR,"$docdir/lon-status/londchld");
644: while (my $filename=readdir(DIR)) {
645: unlink("$docdir/lon-status/londchld/$filename");
646: }
647: closedir(DIR);
648: }
649:
650: # -------------------------------------------------------------- Status setting
651:
652: sub status {
653: my $what=shift;
654: my $now=time;
655: my $local=localtime($now);
656: $status=$local.': '.$what;
657: $0='lond: '.$what.' '.$local;
658: }
659:
660: # -------------------------------------------------------- Escape Special Chars
661:
662: sub escape {
663: my $str=shift;
664: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
665: return $str;
666: }
667:
668: # ----------------------------------------------------- Un-Escape Special Chars
669:
670: sub unescape {
671: my $str=shift;
672: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
673: return $str;
674: }
675:
676: # ----------------------------------------------------------- Send USR1 to lonc
677:
678: sub reconlonc {
679: my $peerfile=shift;
680: &logthis("Trying to reconnect for $peerfile");
681: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
682: if (my $fh=IO::File->new("$loncfile")) {
683: my $loncpid=<$fh>;
684: chomp($loncpid);
685: if (kill 0 => $loncpid) {
686: &logthis("lonc at pid $loncpid responding, sending USR1");
687: kill USR1 => $loncpid;
688: } else {
689: &logthis(
690: "<font color=red>CRITICAL: "
691: ."lonc at pid $loncpid not responding, giving up</font>");
692: }
693: } else {
694: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
695: }
696: }
697:
698: # -------------------------------------------------- Non-critical communication
699:
700: sub subreply {
701: my ($cmd,$server)=@_;
702: my $peerfile="$perlvar{'lonSockDir'}/$server";
703: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
704: Type => SOCK_STREAM,
705: Timeout => 10)
706: or return "con_lost";
707: print $sclient "$cmd\n";
708: my $answer=<$sclient>;
709: chomp($answer);
710: if (!$answer) { $answer="con_lost"; }
711: return $answer;
712: }
713:
714: sub reply {
715: my ($cmd,$server)=@_;
716: my $answer;
717: if ($server ne $currenthostid) {
718: $answer=subreply($cmd,$server);
719: if ($answer eq 'con_lost') {
720: $answer=subreply("ping",$server);
721: if ($answer ne $server) {
722: &logthis("sub reply: answer != server answer is $answer, server is $server");
723: &reconlonc("$perlvar{'lonSockDir'}/$server");
724: }
725: $answer=subreply($cmd,$server);
726: }
727: } else {
728: $answer='self_reply';
729: }
730: return $answer;
731: }
732:
733: # -------------------------------------------------------------- Talk to lonsql
734:
735: sub sqlreply {
736: my ($cmd)=@_;
737: my $answer=subsqlreply($cmd);
738: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
739: return $answer;
740: }
741:
742: sub subsqlreply {
743: my ($cmd)=@_;
744: my $unixsock="mysqlsock";
745: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
746: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
747: Type => SOCK_STREAM,
748: Timeout => 10)
749: or return "con_lost";
750: print $sclient "$cmd\n";
751: my $answer=<$sclient>;
752: chomp($answer);
753: if (!$answer) { $answer="con_lost"; }
754: return $answer;
755: }
756:
757: # -------------------------------------------- Return path to profile directory
758:
759: sub propath {
760: my ($udom,$uname)=@_;
761: $udom=~s/\W//g;
762: $uname=~s/\W//g;
763: my $subdir=$uname.'__';
764: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
765: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
766: return $proname;
767: }
768:
769: # --------------------------------------- Is this the home server of an author?
770:
771: sub ishome {
772: my $author=shift;
773: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
774: my ($udom,$uname)=split(/\//,$author);
775: my $proname=propath($udom,$uname);
776: if (-e $proname) {
777: return 'owner';
778: } else {
779: return 'not_owner';
780: }
781: }
782:
783: # ======================================================= Continue main program
784: # ---------------------------------------------------- Fork once and dissociate
785:
786: my $fpid=fork;
787: exit if $fpid;
788: die "Couldn't fork: $!" unless defined ($fpid);
789:
790: POSIX::setsid() or die "Can't start new session: $!";
791:
792: # ------------------------------------------------------- Write our PID on disk
793:
794: my $execdir=$perlvar{'lonDaemons'};
795: open (PIDSAVE,">$execdir/logs/lond.pid");
796: print PIDSAVE "$$\n";
797: close(PIDSAVE);
798: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
799: &status('Starting');
800:
801:
802:
803: # ----------------------------------------------------- Install signal handlers
804:
805:
806: $SIG{CHLD} = \&REAPER;
807: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
808: $SIG{HUP} = \&HUPSMAN;
809: $SIG{USR1} = \&checkchildren;
810: $SIG{USR2} = \&UpdateHosts;
811:
812:
813: # --------------------------------------------------------------
814: # Accept connections. When a connection comes in, it is validated
815: # and if good, a child process is created to process transactions
816: # along the connection.
817:
818: while (1) {
819: $client = $server->accept() or next;
820: make_new_child($client);
821: }
822:
823: sub make_new_child {
824: my $pid;
825: my $cipher;
826: my $sigset;
827:
828: $client = shift;
829: &logthis("Attempting to start child");
830: # block signal for fork
831: $sigset = POSIX::SigSet->new(SIGINT);
832: sigprocmask(SIG_BLOCK, $sigset)
833: or die "Can't block SIGINT for fork: $!\n";
834:
835: die "fork: $!" unless defined ($pid = fork);
836:
837: if ($pid) {
838: # Parent records the child's birth and returns.
839: sigprocmask(SIG_UNBLOCK, $sigset)
840: or die "Can't unblock SIGINT for fork: $!\n";
841: $children{$pid} = 1;
842: $children++;
843: &status('Started child '.$pid);
844: return;
845: } else {
846: # Child can *not* return from this subroutine.
847: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
848: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
849: #don't get intercepted
850: $SIG{USR1}= \&logstatus;
851: $SIG{ALRM}= \&timeout;
852: $lastlog='Forked ';
853: $status='Forked';
854:
855: # unblock signals
856: sigprocmask(SIG_UNBLOCK, $sigset)
857: or die "Can't unblock SIGINT for fork: $!\n";
858:
859: my $tmpsnum=0;
860: #---------------------------------------------------- kerberos 5 initialization
861: &Authen::Krb5::init_context();
862: &Authen::Krb5::init_ets();
863:
864: &status('Accepted connection');
865: # =============================================================================
866: # do something with the connection
867: # -----------------------------------------------------------------------------
868: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
869: # connection liveness.
870: # see if we know client and check for spoof IP by challenge
871: my $caller = getpeername($client);
872: my ($port,$iaddr)=unpack_sockaddr_in($caller);
873: $clientip=inet_ntoa($iaddr);
874: my $clientrec=($hostid{$clientip} ne undef);
875: &logthis(
876: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
877: );
878: &status("Connecting $clientip ($hostid{$clientip})");
879: my $clientok;
880: if ($clientrec) {
881: &status("Waiting for init from $clientip ($hostid{$clientip})");
882: my $remotereq=<$client>;
883: $remotereq=~s/[^\w:]//g;
884: if ($remotereq =~ /^init/) {
885: &sethost("sethost:$perlvar{'lonHostID'}");
886: my $challenge="$$".time;
887: print $client "$challenge\n";
888: &status(
889: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
890: $remotereq=<$client>;
891: $remotereq=~s/\W//g;
892: if ($challenge eq $remotereq) {
893: $clientok=1;
894: print $client "ok\n";
895: } else {
896: &logthis(
897: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
898: &status('No challenge reply '.$clientip);
899: }
900: } else {
901: &logthis(
902: "<font color=blue>WARNING: "
903: ."$clientip failed to initialize: >$remotereq< </font>");
904: &status('No init '.$clientip);
905: }
906: } else {
907: &logthis(
908: "<font color=blue>WARNING: Unknown client $clientip</font>");
909: &status('Hung up on '.$clientip);
910: }
911: if ($clientok) {
912: # ---------------- New known client connecting, could mean machine online again
913:
914: foreach my $id (keys(%hostip)) {
915: if ($hostip{$id} ne $clientip ||
916: $hostip{$currenthostid} eq $clientip) {
917: # no need to try to do recon's to myself
918: next;
919: }
920: &reconlonc("$perlvar{'lonSockDir'}/$id");
921: }
922: &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
923: &status('Will listen to '.$hostid{$clientip});
924: # ------------------------------------------------------------ Process requests
925: while (my $userinput=<$client>) {
926: chomp($userinput);
927: Debug("Request = $userinput\n");
928: &status('Processing '.$hostid{$clientip}.': '.$userinput);
929: my $wasenc=0;
930: alarm(120);
931: # ------------------------------------------------------------ See if encrypted
932: if ($userinput =~ /^enc/) {
933: if ($cipher) {
934: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
935: $userinput='';
936: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
937: $userinput.=
938: $cipher->decrypt(
939: pack("H16",substr($encinput,$encidx,16))
940: );
941: }
942: $userinput=substr($userinput,0,$cmdlength);
943: $wasenc=1;
944: }
945: }
946:
947: # ------------------------------------------------------------- Normal commands
948: # ------------------------------------------------------------------------ ping
949: if ($userinput =~ /^ping/) {
950: print $client "$currenthostid\n";
951: # ------------------------------------------------------------------------ pong
952: }elsif ($userinput =~ /^pong/) {
953: my $reply=&reply("ping",$hostid{$clientip});
954: print $client "$currenthostid:$reply\n";
955: # ------------------------------------------------------------------------ ekey
956: } elsif ($userinput =~ /^ekey/) {
957: my $buildkey=time.$$.int(rand 100000);
958: $buildkey=~tr/1-6/A-F/;
959: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
960: my $key=$currenthostid.$hostid{$clientip};
961: $key=~tr/a-z/A-Z/;
962: $key=~tr/G-P/0-9/;
963: $key=~tr/Q-Z/0-9/;
964: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
965: $key=substr($key,0,32);
966: my $cipherkey=pack("H32",$key);
967: $cipher=new IDEA $cipherkey;
968: print $client "$buildkey\n";
969: # ------------------------------------------------------------------------ load
970: } elsif ($userinput =~ /^load/) {
971: my $loadavg;
972: {
973: my $loadfile=IO::File->new('/proc/loadavg');
974: $loadavg=<$loadfile>;
975: }
976: $loadavg =~ s/\s.*//g;
977: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
978: print $client "$loadpercent\n";
979: # -------------------------------------------------------------------- userload
980: } elsif ($userinput =~ /^userload/) {
981: my $userloadpercent=&userload();
982: print $client "$userloadpercent\n";
983:
984: #
985: # Transactions requiring encryption:
986: #
987: # ----------------------------------------------------------------- currentauth
988: } elsif ($userinput =~ /^currentauth/) {
989: if ($wasenc==1) {
990: my ($cmd,$udom,$uname)=split(/:/,$userinput);
991: my $result = GetAuthType($udom, $uname);
992: if($result eq "nouser") {
993: print $client "unknown_user\n";
994: }
995: else {
996: print $client "$result\n"
997: }
998: } else {
999: print $client "refused\n";
1000: }
1001: #--------------------------------------------------------------------- pushfile
1002: } elsif($userinput =~ /^pushfile/) {
1003: if($wasenc == 1) {
1004: my $cert = GetCertificate($userinput);
1005: if(ValidManager($cert)) {
1006: my $reply = PushFile($userinput);
1007: print $client "$reply\n";
1008: } else {
1009: print $client "refused\n";
1010: }
1011: } else {
1012: print $client "refused\n";
1013: }
1014: #--------------------------------------------------------------------- reinit
1015: } elsif($userinput =~ /^reinit/) {
1016: if ($wasenc == 1) {
1017: my $cert = GetCertificate($userinput);
1018: if(ValidManager($cert)) {
1019: chomp($userinput);
1020: my $reply = ReinitProcess($userinput);
1021: print $client "$reply\n";
1022: } else {
1023: print $client "refused\n";
1024: }
1025: } else {
1026: print $client "refused\n";
1027: }
1028: # ------------------------------------------------------------------------ auth
1029: } elsif ($userinput =~ /^auth/) {
1030: if ($wasenc==1) {
1031: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1032: chomp($upass);
1033: $upass=unescape($upass);
1034: my $proname=propath($udom,$uname);
1035: my $passfilename="$proname/passwd";
1036: if (-e $passfilename) {
1037: my $pf = IO::File->new($passfilename);
1038: my $realpasswd=<$pf>;
1039: chomp($realpasswd);
1040: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1041: my $pwdcorrect=0;
1042: if ($howpwd eq 'internal') {
1043: &Debug("Internal auth");
1044: $pwdcorrect=
1045: (crypt($upass,$contentpwd) eq $contentpwd);
1046: } elsif ($howpwd eq 'unix') {
1047: &Debug("Unix auth");
1048: if((getpwnam($uname))[1] eq "") { #no such user!
1049: $pwdcorrect = 0;
1050: } else {
1051: $contentpwd=(getpwnam($uname))[1];
1052: my $pwauth_path="/usr/local/sbin/pwauth";
1053: unless ($contentpwd eq 'x') {
1054: $pwdcorrect=
1055: (crypt($upass,$contentpwd) eq
1056: $contentpwd);
1057: }
1058:
1059: elsif (-e $pwauth_path) {
1060: open PWAUTH, "|$pwauth_path" or
1061: die "Cannot invoke authentication";
1062: print PWAUTH "$uname\n$upass\n";
1063: close PWAUTH;
1064: $pwdcorrect=!$?;
1065: }
1066: }
1067: } elsif ($howpwd eq 'krb4') {
1068: my $null=pack("C",0);
1069: unless ($upass=~/$null/) {
1070: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1071: ($uname,"",$contentpwd,'krbtgt',
1072: $contentpwd,1,$upass);
1073: if (!$krb4_error) {
1074: $pwdcorrect = 1;
1075: } else {
1076: $pwdcorrect=0;
1077: # log error if it is not a bad password
1078: if ($krb4_error != 62) {
1079: &logthis('krb4:'.$uname.','.$contentpwd.','.
1080: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1081: }
1082: }
1083: }
1084: } elsif ($howpwd eq 'krb5') {
1085: my $null=pack("C",0);
1086: unless ($upass=~/$null/) {
1087: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1088: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1089: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1090: my $credentials=&Authen::Krb5::cc_default();
1091: $credentials->initialize($krbclient);
1092: my $krbreturn =
1093: &Authen::Krb5::get_in_tkt_with_password(
1094: $krbclient,$krbserver,$upass,$credentials);
1095: # unless ($krbreturn) {
1096: # &logthis("Krb5 Error: ".
1097: # &Authen::Krb5::error());
1098: # }
1099: $pwdcorrect = ($krbreturn == 1);
1100: } else { $pwdcorrect=0; }
1101: } elsif ($howpwd eq 'localauth') {
1102: $pwdcorrect=&localauth::localauth($uname,$upass,
1103: $contentpwd);
1104: }
1105: if ($pwdcorrect) {
1106: print $client "authorized\n";
1107: } else {
1108: print $client "non_authorized\n";
1109: }
1110: } else {
1111: print $client "unknown_user\n";
1112: }
1113: } else {
1114: print $client "refused\n";
1115: }
1116: # ---------------------------------------------------------------------- passwd
1117: } elsif ($userinput =~ /^passwd/) {
1118: if ($wasenc==1) {
1119: my
1120: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1121: chomp($npass);
1122: $upass=&unescape($upass);
1123: $npass=&unescape($npass);
1124: &Debug("Trying to change password for $uname");
1125: my $proname=propath($udom,$uname);
1126: my $passfilename="$proname/passwd";
1127: if (-e $passfilename) {
1128: my $realpasswd;
1129: { my $pf = IO::File->new($passfilename);
1130: $realpasswd=<$pf>; }
1131: chomp($realpasswd);
1132: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1133: if ($howpwd eq 'internal') {
1134: &Debug("internal auth");
1135: if (crypt($upass,$contentpwd) eq $contentpwd) {
1136: my $salt=time;
1137: $salt=substr($salt,6,2);
1138: my $ncpass=crypt($npass,$salt);
1139: {
1140: my $pf;
1141: if ($pf = IO::File->new(">$passfilename")) {
1142: print $pf "internal:$ncpass\n";
1143: &logthis("Result of password change for $uname: pwchange_success");
1144: print $client "ok\n";
1145: } else {
1146: &logthis("Unable to open $uname passwd to change password");
1147: print $client "non_authorized\n";
1148: }
1149: }
1150:
1151: } else {
1152: print $client "non_authorized\n";
1153: }
1154: } elsif ($howpwd eq 'unix') {
1155: # Unix means we have to access /etc/password
1156: # one way or another.
1157: # First: Make sure the current password is
1158: # correct
1159: &Debug("auth is unix");
1160: $contentpwd=(getpwnam($uname))[1];
1161: my $pwdcorrect = "0";
1162: my $pwauth_path="/usr/local/sbin/pwauth";
1163: unless ($contentpwd eq 'x') {
1164: $pwdcorrect=
1165: (crypt($upass,$contentpwd) eq $contentpwd);
1166: } elsif (-e $pwauth_path) {
1167: open PWAUTH, "|$pwauth_path" or
1168: die "Cannot invoke authentication";
1169: print PWAUTH "$uname\n$upass\n";
1170: close PWAUTH;
1171: &Debug("exited pwauth with $? ($uname,$upass) ");
1172: $pwdcorrect=($? == 0);
1173: }
1174: if ($pwdcorrect) {
1175: my $execdir=$perlvar{'lonDaemons'};
1176: &Debug("Opening lcpasswd pipeline");
1177: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1178: print $pf "$uname\n$npass\n$npass\n";
1179: close $pf;
1180: my $err = $?;
1181: my $result = ($err>0 ? 'pwchange_failure'
1182: : 'ok');
1183: &logthis("Result of password change for $uname: ".
1184: &lcpasswdstrerror($?));
1185: print $client "$result\n";
1186: } else {
1187: print $client "non_authorized\n";
1188: }
1189: } else {
1190: print $client "auth_mode_error\n";
1191: }
1192: } else {
1193: print $client "unknown_user\n";
1194: }
1195: } else {
1196: print $client "refused\n";
1197: }
1198: # -------------------------------------------------------------------- makeuser
1199: } elsif ($userinput =~ /^makeuser/) {
1200: &Debug("Make user received");
1201: my $oldumask=umask(0077);
1202: if ($wasenc==1) {
1203: my
1204: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1205: &Debug("cmd =".$cmd." $udom =".$udom.
1206: " uname=".$uname);
1207: chomp($npass);
1208: $npass=&unescape($npass);
1209: my $proname=propath($udom,$uname);
1210: my $passfilename="$proname/passwd";
1211: &Debug("Password file created will be:".
1212: $passfilename);
1213: if (-e $passfilename) {
1214: print $client "already_exists\n";
1215: } elsif ($udom ne $currentdomainid) {
1216: print $client "not_right_domain\n";
1217: } else {
1218: my @fpparts=split(/\//,$proname);
1219: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1220: my $fperror='';
1221: for (my $i=3;$i<=$#fpparts;$i++) {
1222: $fpnow.='/'.$fpparts[$i];
1223: unless (-e $fpnow) {
1224: unless (mkdir($fpnow,0777)) {
1225: $fperror="error: ".($!+0)
1226: ." mkdir failed while attempting "
1227: ."makeuser\n";
1228: }
1229: }
1230: }
1231: unless ($fperror) {
1232: my $result=&make_passwd_file($uname, $umode,$npass,
1233: $passfilename);
1234: print $client $result;
1235: } else {
1236: print $client "$fperror\n";
1237: }
1238: }
1239: } else {
1240: print $client "refused\n";
1241: }
1242: umask($oldumask);
1243: # -------------------------------------------------------------- changeuserauth
1244: } elsif ($userinput =~ /^changeuserauth/) {
1245: &Debug("Changing authorization");
1246: if ($wasenc==1) {
1247: my
1248: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1249: chomp($npass);
1250: &Debug("cmd = ".$cmd." domain= ".$udom.
1251: "uname =".$uname." umode= ".$umode);
1252: $npass=&unescape($npass);
1253: my $proname=&propath($udom,$uname);
1254: my $passfilename="$proname/passwd";
1255: if ($udom ne $currentdomainid) {
1256: print $client "not_right_domain\n";
1257: } else {
1258: my $result=&make_passwd_file($uname, $umode,$npass,
1259: $passfilename);
1260: print $client $result;
1261: }
1262: } else {
1263: print $client "refused\n";
1264: }
1265: # ------------------------------------------------------------------------ home
1266: } elsif ($userinput =~ /^home/) {
1267: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1268: chomp($uname);
1269: my $proname=propath($udom,$uname);
1270: if (-e $proname) {
1271: print $client "found\n";
1272: } else {
1273: print $client "not_found\n";
1274: }
1275: # ---------------------------------------------------------------------- update
1276: } elsif ($userinput =~ /^update/) {
1277: my ($cmd,$fname)=split(/:/,$userinput);
1278: my $ownership=ishome($fname);
1279: if ($ownership eq 'not_owner') {
1280: if (-e $fname) {
1281: my ($dev,$ino,$mode,$nlink,
1282: $uid,$gid,$rdev,$size,
1283: $atime,$mtime,$ctime,
1284: $blksize,$blocks)=stat($fname);
1285: my $now=time;
1286: my $since=$now-$atime;
1287: if ($since>$perlvar{'lonExpire'}) {
1288: my $reply=
1289: &reply("unsub:$fname","$hostid{$clientip}");
1290: unlink("$fname");
1291: } else {
1292: my $transname="$fname.in.transfer";
1293: my $remoteurl=
1294: reply("sub:$fname","$hostid{$clientip}");
1295: my $response;
1296: {
1297: my $ua=new LWP::UserAgent;
1298: my $request=new HTTP::Request('GET',"$remoteurl");
1299: $response=$ua->request($request,$transname);
1300: }
1301: if ($response->is_error()) {
1302: unlink($transname);
1303: my $message=$response->status_line;
1304: &logthis(
1305: "LWP GET: $message for $fname ($remoteurl)");
1306: } else {
1307: if ($remoteurl!~/\.meta$/) {
1308: my $ua=new LWP::UserAgent;
1309: my $mrequest=
1310: new HTTP::Request('GET',$remoteurl.'.meta');
1311: my $mresponse=
1312: $ua->request($mrequest,$fname.'.meta');
1313: if ($mresponse->is_error()) {
1314: unlink($fname.'.meta');
1315: }
1316: }
1317: rename($transname,$fname);
1318: }
1319: }
1320: print $client "ok\n";
1321: } else {
1322: print $client "not_found\n";
1323: }
1324: } else {
1325: print $client "rejected\n";
1326: }
1327: # -------------------------------------- fetch a user file from a remote server
1328: } elsif ($userinput =~ /^fetchuserfile/) {
1329: my ($cmd,$fname)=split(/:/,$userinput);
1330: my ($udom,$uname,$ufile)=split(/\//,$fname);
1331: my $udir=propath($udom,$uname).'/userfiles';
1332: unless (-e $udir) { mkdir($udir,0770); }
1333: if (-e $udir) {
1334: $ufile=~s/^[\.\~]+//;
1335: $ufile=~s/\///g;
1336: my $transname=$udir.'/'.$ufile;
1337: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1338: my $response;
1339: {
1340: my $ua=new LWP::UserAgent;
1341: my $request=new HTTP::Request('GET',"$remoteurl");
1342: $response=$ua->request($request,$transname);
1343: }
1344: if ($response->is_error()) {
1345: unlink($transname);
1346: my $message=$response->status_line;
1347: &logthis(
1348: "LWP GET: $message for $fname ($remoteurl)");
1349: print $client "failed\n";
1350: } else {
1351: print $client "ok\n";
1352: }
1353: } else {
1354: print $client "not_home\n";
1355: }
1356: # ------------------------------------------ authenticate access to a user file
1357: } elsif ($userinput =~ /^tokenauthuserfile/) {
1358: my ($cmd,$fname,$session)=split(/:/,$userinput);
1359: chomp($session);
1360: my $reply='non_auth';
1361: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1362: $session.'.id')) {
1363: while (my $line=<ENVIN>) {
1364: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1365: }
1366: close(ENVIN);
1367: print $client $reply."\n";
1368: } else {
1369: print $client "invalid_token\n";
1370: }
1371: # ----------------------------------------------------------------- unsubscribe
1372: } elsif ($userinput =~ /^unsub/) {
1373: my ($cmd,$fname)=split(/:/,$userinput);
1374: if (-e $fname) {
1375: print $client &unsub($client,$fname,$clientip);
1376: } else {
1377: print $client "not_found\n";
1378: }
1379: # ------------------------------------------------------------------- subscribe
1380: } elsif ($userinput =~ /^sub/) {
1381: print $client &subscribe($userinput,$clientip);
1382: # ------------------------------------------------------------- current version
1383: } elsif ($userinput =~ /^currentversion/) {
1384: my ($cmd,$fname)=split(/:/,$userinput);
1385: print $client ¤tversion($fname)."\n";
1386: # ------------------------------------------------------------------------- log
1387: } elsif ($userinput =~ /^log/) {
1388: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1389: chomp($what);
1390: my $proname=propath($udom,$uname);
1391: my $now=time;
1392: {
1393: my $hfh;
1394: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1395: print $hfh "$now:$hostid{$clientip}:$what\n";
1396: print $client "ok\n";
1397: } else {
1398: print $client "error: ".($!+0)
1399: ." IO::File->new Failed "
1400: ."while attempting log\n";
1401: }
1402: }
1403: # ------------------------------------------------------------------------- put
1404: } elsif ($userinput =~ /^put/) {
1405: my ($cmd,$udom,$uname,$namespace,$what)
1406: =split(/:/,$userinput);
1407: $namespace=~s/\//\_/g;
1408: $namespace=~s/\W//g;
1409: if ($namespace ne 'roles') {
1410: chomp($what);
1411: my $proname=propath($udom,$uname);
1412: my $now=time;
1413: unless ($namespace=~/^nohist\_/) {
1414: my $hfh;
1415: if (
1416: $hfh=IO::File->new(">>$proname/$namespace.hist")
1417: ) { print $hfh "P:$now:$what\n"; }
1418: }
1419: my @pairs=split(/\&/,$what);
1420: my %hash;
1421: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1422: foreach my $pair (@pairs) {
1423: my ($key,$value)=split(/=/,$pair);
1424: $hash{$key}=$value;
1425: }
1426: if (untie(%hash)) {
1427: print $client "ok\n";
1428: } else {
1429: print $client "error: ".($!+0)
1430: ." untie(GDBM) failed ".
1431: "while attempting put\n";
1432: }
1433: } else {
1434: print $client "error: ".($!)
1435: ." tie(GDBM) Failed ".
1436: "while attempting put\n";
1437: }
1438: } else {
1439: print $client "refused\n";
1440: }
1441: # -------------------------------------------------------------------- rolesput
1442: } elsif ($userinput =~ /^rolesput/) {
1443: &Debug("rolesput");
1444: if ($wasenc==1) {
1445: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1446: =split(/:/,$userinput);
1447: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1448: "user = ".$exeuser." udom=".$udom.
1449: "what = ".$what);
1450: my $namespace='roles';
1451: chomp($what);
1452: my $proname=propath($udom,$uname);
1453: my $now=time;
1454: {
1455: my $hfh;
1456: if (
1457: $hfh=IO::File->new(">>$proname/$namespace.hist")
1458: ) {
1459: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1460: }
1461: }
1462: my @pairs=split(/\&/,$what);
1463: my %hash;
1464: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1465: foreach my $pair (@pairs) {
1466: my ($key,$value)=split(/=/,$pair);
1467: &ManagePermissions($key, $udom, $uname,
1468: &GetAuthType( $udom,
1469: $uname));
1470: $hash{$key}=$value;
1471: }
1472: if (untie(%hash)) {
1473: print $client "ok\n";
1474: } else {
1475: print $client "error: ".($!+0)
1476: ." untie(GDBM) Failed ".
1477: "while attempting rolesput\n";
1478: }
1479: } else {
1480: print $client "error: ".($!+0)
1481: ." tie(GDBM) Failed ".
1482: "while attempting rolesput\n";
1483: }
1484: } else {
1485: print $client "refused\n";
1486: }
1487: # -------------------------------------------------------------------- rolesdel
1488: } elsif ($userinput =~ /^rolesdel/) {
1489: &Debug("rolesdel");
1490: if ($wasenc==1) {
1491: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1492: =split(/:/,$userinput);
1493: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1494: "user = ".$exeuser." udom=".$udom.
1495: "what = ".$what);
1496: my $namespace='roles';
1497: chomp($what);
1498: my $proname=propath($udom,$uname);
1499: my $now=time;
1500: {
1501: my $hfh;
1502: if (
1503: $hfh=IO::File->new(">>$proname/$namespace.hist")
1504: ) {
1505: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1506: }
1507: }
1508: my @rolekeys=split(/\&/,$what);
1509: my %hash;
1510: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1511: foreach my $key (@rolekeys) {
1512: delete $hash{$key};
1513: }
1514: if (untie(%hash)) {
1515: print $client "ok\n";
1516: } else {
1517: print $client "error: ".($!+0)
1518: ." untie(GDBM) Failed ".
1519: "while attempting rolesdel\n";
1520: }
1521: } else {
1522: print $client "error: ".($!+0)
1523: ." tie(GDBM) Failed ".
1524: "while attempting rolesdel\n";
1525: }
1526: } else {
1527: print $client "refused\n";
1528: }
1529: # ------------------------------------------------------------------------- get
1530: } elsif ($userinput =~ /^get/) {
1531: my ($cmd,$udom,$uname,$namespace,$what)
1532: =split(/:/,$userinput);
1533: $namespace=~s/\//\_/g;
1534: $namespace=~s/\W//g;
1535: chomp($what);
1536: my @queries=split(/\&/,$what);
1537: my $proname=propath($udom,$uname);
1538: my $qresult='';
1539: my %hash;
1540: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1541: for (my $i=0;$i<=$#queries;$i++) {
1542: $qresult.="$hash{$queries[$i]}&";
1543: }
1544: if (untie(%hash)) {
1545: $qresult=~s/\&$//;
1546: print $client "$qresult\n";
1547: } else {
1548: print $client "error: ".($!+0)
1549: ." untie(GDBM) Failed ".
1550: "while attempting get\n";
1551: }
1552: } else {
1553: if ($!+0 == 2) {
1554: print $client "error:No such file or ".
1555: "GDBM reported bad block error\n";
1556: } else {
1557: print $client "error: ".($!+0)
1558: ." tie(GDBM) Failed ".
1559: "while attempting get\n";
1560: }
1561: }
1562: # ------------------------------------------------------------------------ eget
1563: } elsif ($userinput =~ /^eget/) {
1564: my ($cmd,$udom,$uname,$namespace,$what)
1565: =split(/:/,$userinput);
1566: $namespace=~s/\//\_/g;
1567: $namespace=~s/\W//g;
1568: chomp($what);
1569: my @queries=split(/\&/,$what);
1570: my $proname=propath($udom,$uname);
1571: my $qresult='';
1572: my %hash;
1573: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1574: for (my $i=0;$i<=$#queries;$i++) {
1575: $qresult.="$hash{$queries[$i]}&";
1576: }
1577: if (untie(%hash)) {
1578: $qresult=~s/\&$//;
1579: if ($cipher) {
1580: my $cmdlength=length($qresult);
1581: $qresult.=" ";
1582: my $encqresult='';
1583: for
1584: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1585: $encqresult.=
1586: unpack("H16",
1587: $cipher->encrypt(substr($qresult,$encidx,8)));
1588: }
1589: print $client "enc:$cmdlength:$encqresult\n";
1590: } else {
1591: print $client "error:no_key\n";
1592: }
1593: } else {
1594: print $client "error: ".($!+0)
1595: ." untie(GDBM) Failed ".
1596: "while attempting eget\n";
1597: }
1598: } else {
1599: print $client "error: ".($!+0)
1600: ." tie(GDBM) Failed ".
1601: "while attempting eget\n";
1602: }
1603: # ------------------------------------------------------------------------- del
1604: } elsif ($userinput =~ /^del/) {
1605: my ($cmd,$udom,$uname,$namespace,$what)
1606: =split(/:/,$userinput);
1607: $namespace=~s/\//\_/g;
1608: $namespace=~s/\W//g;
1609: chomp($what);
1610: my $proname=propath($udom,$uname);
1611: my $now=time;
1612: unless ($namespace=~/^nohist\_/) {
1613: my $hfh;
1614: if (
1615: $hfh=IO::File->new(">>$proname/$namespace.hist")
1616: ) { print $hfh "D:$now:$what\n"; }
1617: }
1618: my @keys=split(/\&/,$what);
1619: my %hash;
1620: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1621: foreach my $key (@keys) {
1622: delete($hash{$key});
1623: }
1624: if (untie(%hash)) {
1625: print $client "ok\n";
1626: } else {
1627: print $client "error: ".($!+0)
1628: ." untie(GDBM) Failed ".
1629: "while attempting del\n";
1630: }
1631: } else {
1632: print $client "error: ".($!+0)
1633: ." tie(GDBM) Failed ".
1634: "while attempting del\n";
1635: }
1636: # ------------------------------------------------------------------------ keys
1637: } elsif ($userinput =~ /^keys/) {
1638: my ($cmd,$udom,$uname,$namespace)
1639: =split(/:/,$userinput);
1640: $namespace=~s/\//\_/g;
1641: $namespace=~s/\W//g;
1642: my $proname=propath($udom,$uname);
1643: my $qresult='';
1644: my %hash;
1645: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1646: foreach my $key (keys %hash) {
1647: $qresult.="$key&";
1648: }
1649: if (untie(%hash)) {
1650: $qresult=~s/\&$//;
1651: print $client "$qresult\n";
1652: } else {
1653: print $client "error: ".($!+0)
1654: ." untie(GDBM) Failed ".
1655: "while attempting keys\n";
1656: }
1657: } else {
1658: print $client "error: ".($!+0)
1659: ." tie(GDBM) Failed ".
1660: "while attempting keys\n";
1661: }
1662: # ----------------------------------------------------------------- dumpcurrent
1663: } elsif ($userinput =~ /^currentdump/) {
1664: my ($cmd,$udom,$uname,$namespace)
1665: =split(/:/,$userinput);
1666: $namespace=~s/\//\_/g;
1667: $namespace=~s/\W//g;
1668: my $qresult='';
1669: my $proname=propath($udom,$uname);
1670: my %hash;
1671: if (tie(%hash,'GDBM_File',
1672: "$proname/$namespace.db",
1673: &GDBM_READER(),0640)) {
1674: # Structure of %data:
1675: # $data{$symb}->{$parameter}=$value;
1676: # $data{$symb}->{'v.'.$parameter}=$version;
1677: # since $parameter will be unescaped, we do not
1678: # have to worry about silly parameter names...
1679: my %data = ();
1680: while (my ($key,$value) = each(%hash)) {
1681: my ($v,$symb,$param) = split(/:/,$key);
1682: next if ($v eq 'version' || $symb eq 'keys');
1683: next if (exists($data{$symb}) &&
1684: exists($data{$symb}->{$param}) &&
1685: $data{$symb}->{'v.'.$param} > $v);
1686: $data{$symb}->{$param}=$value;
1687: $data{$symb}->{'v.'.$param}=$v;
1688: }
1689: if (untie(%hash)) {
1690: while (my ($symb,$param_hash) = each(%data)) {
1691: while(my ($param,$value) = each (%$param_hash)){
1692: next if ($param =~ /^v\./);
1693: $qresult.=$symb.':'.$param.'='.$value.'&';
1694: }
1695: }
1696: chop($qresult);
1697: print $client "$qresult\n";
1698: } else {
1699: print $client "error: ".($!+0)
1700: ." untie(GDBM) Failed ".
1701: "while attempting currentdump\n";
1702: }
1703: } else {
1704: print $client "error: ".($!+0)
1705: ." tie(GDBM) Failed ".
1706: "while attempting currentdump\n";
1707: }
1708: # ------------------------------------------------------------------------ dump
1709: } elsif ($userinput =~ /^dump/) {
1710: my ($cmd,$udom,$uname,$namespace,$regexp)
1711: =split(/:/,$userinput);
1712: $namespace=~s/\//\_/g;
1713: $namespace=~s/\W//g;
1714: if (defined($regexp)) {
1715: $regexp=&unescape($regexp);
1716: } else {
1717: $regexp='.';
1718: }
1719: my $qresult='';
1720: my $proname=propath($udom,$uname);
1721: my %hash;
1722: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1723: study($regexp);
1724: while (my ($key,$value) = each(%hash)) {
1725: if ($regexp eq '.') {
1726: $qresult.=$key.'='.$value.'&';
1727: } else {
1728: my $unescapeKey = &unescape($key);
1729: if (eval('$unescapeKey=~/$regexp/')) {
1730: $qresult.="$key=$value&";
1731: }
1732: }
1733: }
1734: if (untie(%hash)) {
1735: chop($qresult);
1736: print $client "$qresult\n";
1737: } else {
1738: print $client "error: ".($!+0)
1739: ." untie(GDBM) Failed ".
1740: "while attempting dump\n";
1741: }
1742: } else {
1743: print $client "error: ".($!+0)
1744: ." tie(GDBM) Failed ".
1745: "while attempting dump\n";
1746: }
1747: # ----------------------------------------------------------------------- store
1748: } elsif ($userinput =~ /^store/) {
1749: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1750: =split(/:/,$userinput);
1751: $namespace=~s/\//\_/g;
1752: $namespace=~s/\W//g;
1753: if ($namespace ne 'roles') {
1754: chomp($what);
1755: my $proname=propath($udom,$uname);
1756: my $now=time;
1757: unless ($namespace=~/^nohist\_/) {
1758: my $hfh;
1759: if (
1760: $hfh=IO::File->new(">>$proname/$namespace.hist")
1761: ) { print $hfh "P:$now:$rid:$what\n"; }
1762: }
1763: my @pairs=split(/\&/,$what);
1764: my %hash;
1765: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1766: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1767: my $key;
1768: $hash{"version:$rid"}++;
1769: my $version=$hash{"version:$rid"};
1770: my $allkeys='';
1771: foreach my $pair (@pairs) {
1772: my ($key,$value)=split(/=/,$pair);
1773: $allkeys.=$key.':';
1774: $hash{"$version:$rid:$key"}=$value;
1775: }
1776: $hash{"$version:$rid:timestamp"}=$now;
1777: $allkeys.='timestamp';
1778: $hash{"$version:keys:$rid"}=$allkeys;
1779: if (untie(%hash)) {
1780: print $client "ok\n";
1781: } else {
1782: print $client "error: ".($!+0)
1783: ." untie(GDBM) Failed ".
1784: "while attempting store\n";
1785: }
1786: } else {
1787: print $client "error: ".($!+0)
1788: ." tie(GDBM) Failed ".
1789: "while attempting store\n";
1790: }
1791: } else {
1792: print $client "refused\n";
1793: }
1794: # --------------------------------------------------------------------- restore
1795: } elsif ($userinput =~ /^restore/) {
1796: my ($cmd,$udom,$uname,$namespace,$rid)
1797: =split(/:/,$userinput);
1798: $namespace=~s/\//\_/g;
1799: $namespace=~s/\W//g;
1800: chomp($rid);
1801: my $proname=propath($udom,$uname);
1802: my $qresult='';
1803: my %hash;
1804: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1805: my $version=$hash{"version:$rid"};
1806: $qresult.="version=$version&";
1807: my $scope;
1808: for ($scope=1;$scope<=$version;$scope++) {
1809: my $vkeys=$hash{"$scope:keys:$rid"};
1810: my @keys=split(/:/,$vkeys);
1811: my $key;
1812: $qresult.="$scope:keys=$vkeys&";
1813: foreach $key (@keys) {
1814: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1815: }
1816: }
1817: if (untie(%hash)) {
1818: $qresult=~s/\&$//;
1819: print $client "$qresult\n";
1820: } else {
1821: print $client "error: ".($!+0)
1822: ." untie(GDBM) Failed ".
1823: "while attempting restore\n";
1824: }
1825: } else {
1826: print $client "error: ".($!+0)
1827: ." tie(GDBM) Failed ".
1828: "while attempting restore\n";
1829: }
1830: # -------------------------------------------------------------------- chatsend
1831: } elsif ($userinput =~ /^chatsend/) {
1832: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1833: &chatadd($cdom,$cnum,$newpost);
1834: print $client "ok\n";
1835: # -------------------------------------------------------------------- chatretr
1836: } elsif ($userinput =~ /^chatretr/) {
1837: my
1838: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1839: my $reply='';
1840: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1841: $reply.=&escape($_).':';
1842: }
1843: $reply=~s/\:$//;
1844: print $client $reply."\n";
1845: # ------------------------------------------------------------------- querysend
1846: } elsif ($userinput =~ /^querysend/) {
1847: my ($cmd,$query,
1848: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1849: $query=~s/\n*$//g;
1850: print $client "".
1851: sqlreply("$hostid{$clientip}\&$query".
1852: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1853: # ------------------------------------------------------------------ queryreply
1854: } elsif ($userinput =~ /^queryreply/) {
1855: my ($cmd,$id,$reply)=split(/:/,$userinput);
1856: my $store;
1857: my $execdir=$perlvar{'lonDaemons'};
1858: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1859: $reply=~s/\&/\n/g;
1860: print $store $reply;
1861: close $store;
1862: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1863: print $store2 "done\n";
1864: close $store2;
1865: print $client "ok\n";
1866: }
1867: else {
1868: print $client "error: ".($!+0)
1869: ." IO::File->new Failed ".
1870: "while attempting queryreply\n";
1871: }
1872: # ----------------------------------------------------------------- courseidput
1873: } elsif ($userinput =~ /^courseidput/) {
1874: my ($cmd,$udom,$what)=split(/:/,$userinput);
1875: chomp($what);
1876: $udom=~s/\W//g;
1877: my $proname=
1878: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1879: my $now=time;
1880: my @pairs=split(/\&/,$what);
1881: my %hash;
1882: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1883: foreach my $pair (@pairs) {
1884: my ($key,$value)=split(/=/,$pair);
1885: $hash{$key}=$value.':'.$now;
1886: }
1887: if (untie(%hash)) {
1888: print $client "ok\n";
1889: } else {
1890: print $client "error: ".($!+0)
1891: ." untie(GDBM) Failed ".
1892: "while attempting courseidput\n";
1893: }
1894: } else {
1895: print $client "error: ".($!+0)
1896: ." tie(GDBM) Failed ".
1897: "while attempting courseidput\n";
1898: }
1899: # ---------------------------------------------------------------- courseiddump
1900: } elsif ($userinput =~ /^courseiddump/) {
1901: my ($cmd,$udom,$since,$description)
1902: =split(/:/,$userinput);
1903: if (defined($description)) {
1904: $description=&unescape($description);
1905: } else {
1906: $description='.';
1907: }
1908: unless (defined($since)) { $since=0; }
1909: my $qresult='';
1910: my $proname=
1911: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1912: my %hash;
1913: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1914: while (my ($key,$value) = each(%hash)) {
1915: my ($descr,$lasttime)=split(/\:/,$value);
1916: if ($lasttime<$since) { next; }
1917: if ($description eq '.') {
1918: $qresult.=$key.'='.$descr.'&';
1919: } else {
1920: my $unescapeVal = &unescape($descr);
1921: if (eval('$unescapeVal=~/$description/i')) {
1922: $qresult.="$key=$descr&";
1923: }
1924: }
1925: }
1926: if (untie(%hash)) {
1927: chop($qresult);
1928: print $client "$qresult\n";
1929: } else {
1930: print $client "error: ".($!+0)
1931: ." untie(GDBM) Failed ".
1932: "while attempting courseiddump\n";
1933: }
1934: } else {
1935: print $client "error: ".($!+0)
1936: ." tie(GDBM) Failed ".
1937: "while attempting courseiddump\n";
1938: }
1939: # ----------------------------------------------------------------------- idput
1940: } elsif ($userinput =~ /^idput/) {
1941: my ($cmd,$udom,$what)=split(/:/,$userinput);
1942: chomp($what);
1943: $udom=~s/\W//g;
1944: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1945: my $now=time;
1946: {
1947: my $hfh;
1948: if (
1949: $hfh=IO::File->new(">>$proname.hist")
1950: ) { print $hfh "P:$now:$what\n"; }
1951: }
1952: my @pairs=split(/\&/,$what);
1953: my %hash;
1954: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1955: foreach my $pair (@pairs) {
1956: my ($key,$value)=split(/=/,$pair);
1957: $hash{$key}=$value;
1958: }
1959: if (untie(%hash)) {
1960: print $client "ok\n";
1961: } else {
1962: print $client "error: ".($!+0)
1963: ." untie(GDBM) Failed ".
1964: "while attempting idput\n";
1965: }
1966: } else {
1967: print $client "error: ".($!+0)
1968: ." tie(GDBM) Failed ".
1969: "while attempting idput\n";
1970: }
1971: # ----------------------------------------------------------------------- idget
1972: } elsif ($userinput =~ /^idget/) {
1973: my ($cmd,$udom,$what)=split(/:/,$userinput);
1974: chomp($what);
1975: $udom=~s/\W//g;
1976: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1977: my @queries=split(/\&/,$what);
1978: my $qresult='';
1979: my %hash;
1980: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1981: for (my $i=0;$i<=$#queries;$i++) {
1982: $qresult.="$hash{$queries[$i]}&";
1983: }
1984: if (untie(%hash)) {
1985: $qresult=~s/\&$//;
1986: print $client "$qresult\n";
1987: } else {
1988: print $client "error: ".($!+0)
1989: ." untie(GDBM) Failed ".
1990: "while attempting idget\n";
1991: }
1992: } else {
1993: print $client "error: ".($!+0)
1994: ." tie(GDBM) Failed ".
1995: "while attempting idget\n";
1996: }
1997: # ---------------------------------------------------------------------- tmpput
1998: } elsif ($userinput =~ /^tmpput/) {
1999: my ($cmd,$what)=split(/:/,$userinput);
2000: my $store;
2001: $tmpsnum++;
2002: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2003: $id=~s/\W/\_/g;
2004: $what=~s/\n//g;
2005: my $execdir=$perlvar{'lonDaemons'};
2006: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2007: print $store $what;
2008: close $store;
2009: print $client "$id\n";
2010: }
2011: else {
2012: print $client "error: ".($!+0)
2013: ."IO::File->new Failed ".
2014: "while attempting tmpput\n";
2015: }
2016:
2017: # ---------------------------------------------------------------------- tmpget
2018: } elsif ($userinput =~ /^tmpget/) {
2019: my ($cmd,$id)=split(/:/,$userinput);
2020: chomp($id);
2021: $id=~s/\W/\_/g;
2022: my $store;
2023: my $execdir=$perlvar{'lonDaemons'};
2024: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2025: my $reply=<$store>;
2026: print $client "$reply\n";
2027: close $store;
2028: }
2029: else {
2030: print $client "error: ".($!+0)
2031: ."IO::File->new Failed ".
2032: "while attempting tmpget\n";
2033: }
2034:
2035: # ---------------------------------------------------------------------- tmpdel
2036: } elsif ($userinput =~ /^tmpdel/) {
2037: my ($cmd,$id)=split(/:/,$userinput);
2038: chomp($id);
2039: $id=~s/\W/\_/g;
2040: my $execdir=$perlvar{'lonDaemons'};
2041: if (unlink("$execdir/tmp/$id.tmp")) {
2042: print $client "ok\n";
2043: } else {
2044: print $client "error: ".($!+0)
2045: ."Unlink tmp Failed ".
2046: "while attempting tmpdel\n";
2047: }
2048: # -------------------------------------------------------------------------- ls
2049: } elsif ($userinput =~ /^ls/) {
2050: my ($cmd,$ulsdir)=split(/:/,$userinput);
2051: my $ulsout='';
2052: my $ulsfn;
2053: if (-e $ulsdir) {
2054: if(-d $ulsdir) {
2055: if (opendir(LSDIR,$ulsdir)) {
2056: while ($ulsfn=readdir(LSDIR)) {
2057: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2058: $ulsout.=$ulsfn.'&'.
2059: join('&',@ulsstats).':';
2060: }
2061: closedir(LSDIR);
2062: }
2063: } else {
2064: my @ulsstats=stat($ulsdir);
2065: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2066: }
2067: } else {
2068: $ulsout='no_such_dir';
2069: }
2070: if ($ulsout eq '') { $ulsout='empty'; }
2071: print $client "$ulsout\n";
2072: # ----------------------------------------------------------------- setannounce
2073: } elsif ($userinput =~ /^setannounce/) {
2074: my ($cmd,$announcement)=split(/:/,$userinput);
2075: chomp($announcement);
2076: $announcement=&unescape($announcement);
2077: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2078: '/announcement.txt')) {
2079: print $store $announcement;
2080: close $store;
2081: print $client "ok\n";
2082: } else {
2083: print $client "error: ".($!+0)."\n";
2084: }
2085: # ------------------------------------------------------------------ Hanging up
2086: } elsif (($userinput =~ /^exit/) ||
2087: ($userinput =~ /^init/)) {
2088: &logthis(
2089: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
2090: print $client "bye\n";
2091: $client->close();
2092: last;
2093: # ------------------------------------------------------------- unknown command
2094: } elsif ($userinput =~ /^sethost:/) {
2095: print $client &sethost($userinput)."\n";
2096: } elsif ($userinput =~/^version:/) {
2097: print $client &version($userinput)."\n";
2098: } else {
2099: # unknown command
2100: print $client "unknown_cmd\n";
2101: }
2102: # -------------------------------------------------------------------- complete
2103: alarm(0);
2104: &status('Listening to '.$hostid{$clientip});
2105: }
2106: # --------------------------------------------- client unknown or fishy, refuse
2107: } else {
2108: print $client "refused\n";
2109: $client->close();
2110: &logthis("<font color=blue>WARNING: "
2111: ."Rejected client $clientip, closing connection</font>");
2112: }
2113: }
2114:
2115: # =============================================================================
2116:
2117: &logthis("<font color=red>CRITICAL: "
2118: ."Disconnect from $clientip ($hostid{$clientip})</font>");
2119:
2120:
2121: # this exit is VERY important, otherwise the child will become
2122: # a producer of more and more children, forking yourself into
2123: # process death.
2124: exit;
2125:
2126: }
2127:
2128:
2129: #
2130: # Checks to see if the input roleput request was to set
2131: # an author role. If so, invokes the lchtmldir script to set
2132: # up a correct public_html
2133: # Parameters:
2134: # request - The request sent to the rolesput subchunk.
2135: # We're looking for /domain/_au
2136: # domain - The domain in which the user is having roles doctored.
2137: # user - Name of the user for which the role is being put.
2138: # authtype - The authentication type associated with the user.
2139: #
2140: sub ManagePermissions
2141: {
2142: my $request = shift;
2143: my $domain = shift;
2144: my $user = shift;
2145: my $authtype= shift;
2146:
2147: # See if the request is of the form /$domain/_au
2148: &logthis("ruequest is $request");
2149: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2150: my $execdir = $perlvar{'lonDaemons'};
2151: my $userhome= "/home/$user" ;
2152: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2153: system("$execdir/lchtmldir $userhome $user $authtype");
2154: }
2155: }
2156: #
2157: # GetAuthType - Determines the authorization type of a user in a domain.
2158:
2159: # Returns the authorization type or nouser if there is no such user.
2160: #
2161: sub GetAuthType
2162: {
2163: my $domain = shift;
2164: my $user = shift;
2165:
2166: Debug("GetAuthType( $domain, $user ) \n");
2167: my $proname = &propath($domain, $user);
2168: my $passwdfile = "$proname/passwd";
2169: if( -e $passwdfile ) {
2170: my $pf = IO::File->new($passwdfile);
2171: my $realpassword = <$pf>;
2172: chomp($realpassword);
2173: Debug("Password info = $realpassword\n");
2174: my ($authtype, $contentpwd) = split(/:/, $realpassword);
2175: Debug("Authtype = $authtype, content = $contentpwd\n");
2176: my $availinfo = '';
2177: if($authtype eq 'krb4' or $authtype eq 'krb5') {
2178: $availinfo = $contentpwd;
2179: }
2180:
2181: return "$authtype:$availinfo";
2182: }
2183: else {
2184: Debug("Returning nouser");
2185: return "nouser";
2186: }
2187: }
2188:
2189: sub addline {
2190: my ($fname,$hostid,$ip,$newline)=@_;
2191: my $contents;
2192: my $found=0;
2193: my $expr='^'.$hostid.':'.$ip.':';
2194: $expr =~ s/\./\\\./g;
2195: my $sh;
2196: if ($sh=IO::File->new("$fname.subscription")) {
2197: while (my $subline=<$sh>) {
2198: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2199: }
2200: $sh->close();
2201: }
2202: $sh=IO::File->new(">$fname.subscription");
2203: if ($contents) { print $sh $contents; }
2204: if ($newline) { print $sh $newline; }
2205: $sh->close();
2206: return $found;
2207: }
2208:
2209: sub getchat {
2210: my ($cdom,$cname,$udom,$uname)=@_;
2211: my %hash;
2212: my $proname=&propath($cdom,$cname);
2213: my @entries=();
2214: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2215: &GDBM_READER(),0640)) {
2216: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2217: untie %hash;
2218: }
2219: my @participants=();
2220: my $cutoff=time-60;
2221: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2222: &GDBM_WRCREAT(),0640)) {
2223: $hash{$uname.':'.$udom}=time;
2224: foreach (sort keys %hash) {
2225: if ($hash{$_}>$cutoff) {
2226: $participants[$#participants+1]='active_participant:'.$_;
2227: }
2228: }
2229: untie %hash;
2230: }
2231: return (@participants,@entries);
2232: }
2233:
2234: sub chatadd {
2235: my ($cdom,$cname,$newchat)=@_;
2236: my %hash;
2237: my $proname=&propath($cdom,$cname);
2238: my @entries=();
2239: my $time=time;
2240: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2241: &GDBM_WRCREAT(),0640)) {
2242: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2243: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2244: my ($thentime,$idnum)=split(/\_/,$lastid);
2245: my $newid=$time.'_000000';
2246: if ($thentime==$time) {
2247: $idnum=~s/^0+//;
2248: $idnum++;
2249: $idnum=substr('000000'.$idnum,-6,6);
2250: $newid=$time.'_'.$idnum;
2251: }
2252: $hash{$newid}=$newchat;
2253: my $expired=$time-3600;
2254: foreach (keys %hash) {
2255: my ($thistime)=($_=~/(\d+)\_/);
2256: if ($thistime<$expired) {
2257: delete $hash{$_};
2258: }
2259: }
2260: untie %hash;
2261: }
2262: {
2263: my $hfh;
2264: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2265: print $hfh "$time:".&unescape($newchat)."\n";
2266: }
2267: }
2268: }
2269:
2270: sub unsub {
2271: my ($fname,$clientip)=@_;
2272: my $result;
2273: if (unlink("$fname.$hostid{$clientip}")) {
2274: $result="ok\n";
2275: } else {
2276: $result="not_subscribed\n";
2277: }
2278: if (-e "$fname.subscription") {
2279: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
2280: if ($found) { $result="ok\n"; }
2281: } else {
2282: if ($result != "ok\n") { $result="not_subscribed\n"; }
2283: }
2284: return $result;
2285: }
2286:
2287: sub currentversion {
2288: my $fname=shift;
2289: my $version=-1;
2290: my $ulsdir='';
2291: if ($fname=~/^(.+)\/[^\/]+$/) {
2292: $ulsdir=$1;
2293: }
2294: my ($fnamere1,$fnamere2);
2295: # remove version if already specified
2296: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
2297: # get the bits that go before and after the version number
2298: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
2299: $fnamere1=$1;
2300: $fnamere2='.'.$2;
2301: }
2302: if (-e $fname) { $version=1; }
2303: if (-e $ulsdir) {
2304: if(-d $ulsdir) {
2305: if (opendir(LSDIR,$ulsdir)) {
2306: my $ulsfn;
2307: while ($ulsfn=readdir(LSDIR)) {
2308: # see if this is a regular file (ignore links produced earlier)
2309: my $thisfile=$ulsdir.'/'.$ulsfn;
2310: unless (-l $thisfile) {
2311: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
2312: if ($1>$version) { $version=$1; }
2313: }
2314: }
2315: }
2316: closedir(LSDIR);
2317: $version++;
2318: }
2319: }
2320: }
2321: return $version;
2322: }
2323:
2324: sub thisversion {
2325: my $fname=shift;
2326: my $version=-1;
2327: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
2328: $version=$1;
2329: }
2330: return $version;
2331: }
2332:
2333: sub subscribe {
2334: my ($userinput,$clientip)=@_;
2335: my $result;
2336: my ($cmd,$fname)=split(/:/,$userinput);
2337: my $ownership=&ishome($fname);
2338: if ($ownership eq 'owner') {
2339: # explitly asking for the current version?
2340: unless (-e $fname) {
2341: my $currentversion=¤tversion($fname);
2342: if (&thisversion($fname)==$currentversion) {
2343: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
2344: my $root=$1;
2345: my $extension=$2;
2346: symlink($root.'.'.$extension,
2347: $root.'.'.$currentversion.'.'.$extension);
2348: unless ($extension=~/\.meta$/) {
2349: symlink($root.'.'.$extension.'.meta',
2350: $root.'.'.$currentversion.'.'.$extension.'.meta');
2351: }
2352: }
2353: }
2354: }
2355: if (-e $fname) {
2356: if (-d $fname) {
2357: $result="directory\n";
2358: } else {
2359: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
2360: my $now=time;
2361: my $found=&addline($fname,$hostid{$clientip},$clientip,
2362: "$hostid{$clientip}:$clientip:$now\n");
2363: if ($found) { $result="$fname\n"; }
2364: # if they were subscribed to only meta data, delete that
2365: # subscription, when you subscribe to a file you also get
2366: # the metadata
2367: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
2368: $fname=~s/\/home\/httpd\/html\/res/raw/;
2369: $fname="http://$thisserver/".$fname;
2370: $result="$fname\n";
2371: }
2372: } else {
2373: $result="not_found\n";
2374: }
2375: } else {
2376: $result="rejected\n";
2377: }
2378: return $result;
2379: }
2380:
2381: sub make_passwd_file {
2382: my ($uname, $umode,$npass,$passfilename)=@_;
2383: my $result="ok\n";
2384: if ($umode eq 'krb4' or $umode eq 'krb5') {
2385: {
2386: my $pf = IO::File->new(">$passfilename");
2387: print $pf "$umode:$npass\n";
2388: }
2389: } elsif ($umode eq 'internal') {
2390: my $salt=time;
2391: $salt=substr($salt,6,2);
2392: my $ncpass=crypt($npass,$salt);
2393: {
2394: &Debug("Creating internal auth");
2395: my $pf = IO::File->new(">$passfilename");
2396: print $pf "internal:$ncpass\n";
2397: }
2398: } elsif ($umode eq 'localauth') {
2399: {
2400: my $pf = IO::File->new(">$passfilename");
2401: print $pf "localauth:$npass\n";
2402: }
2403: } elsif ($umode eq 'unix') {
2404: {
2405: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2406: {
2407: &Debug("Executing external: ".$execpath);
2408: &Debug("user = ".$uname.", Password =". $npass);
2409: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2410: print $se "$uname\n";
2411: print $se "$npass\n";
2412: print $se "$npass\n";
2413: }
2414: my $useraddok = $?;
2415: if($useraddok > 0) {
2416: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2417: }
2418: my $pf = IO::File->new(">$passfilename");
2419: print $pf "unix:\n";
2420: }
2421: } elsif ($umode eq 'none') {
2422: {
2423: my $pf = IO::File->new(">$passfilename");
2424: print $pf "none:\n";
2425: }
2426: } else {
2427: $result="auth_mode_error\n";
2428: }
2429: return $result;
2430: }
2431:
2432: sub sethost {
2433: my ($remotereq) = @_;
2434: my (undef,$hostid)=split(/:/,$remotereq);
2435: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2436: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2437: $currenthostid=$hostid;
2438: $currentdomainid=$hostdom{$hostid};
2439: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2440: } else {
2441: &logthis("Requested host id $hostid not an alias of ".
2442: $perlvar{'lonHostID'}." refusing connection");
2443: return 'unable_to_set';
2444: }
2445: return 'ok';
2446: }
2447:
2448: sub version {
2449: my ($userinput)=@_;
2450: $remoteVERSION=(split(/:/,$userinput))[1];
2451: return "version:$VERSION";
2452: }
2453:
2454: #There is a copy of this in lonnet.pm
2455: sub userload {
2456: my $numusers=0;
2457: {
2458: opendir(LONIDS,$perlvar{'lonIDsDir'});
2459: my $filename;
2460: my $curtime=time;
2461: while ($filename=readdir(LONIDS)) {
2462: if ($filename eq '.' || $filename eq '..') {next;}
2463: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2464: if ($curtime-$mtime < 3600) { $numusers++; }
2465: }
2466: closedir(LONIDS);
2467: }
2468: my $userloadpercent=0;
2469: my $maxuserload=$perlvar{'lonUserLoadLim'};
2470: if ($maxuserload) {
2471: $userloadpercent=100*$numusers/$maxuserload;
2472: }
2473: $userloadpercent=sprintf("%.2f",$userloadpercent);
2474: return $userloadpercent;
2475: }
2476:
2477: # ----------------------------------- POD (plain old documentation, CPAN style)
2478:
2479: =head1 NAME
2480:
2481: lond - "LON Daemon" Server (port "LOND" 5663)
2482:
2483: =head1 SYNOPSIS
2484:
2485: Usage: B<lond>
2486:
2487: Should only be run as user=www. This is a command-line script which
2488: is invoked by B<loncron>. There is no expectation that a typical user
2489: will manually start B<lond> from the command-line. (In other words,
2490: DO NOT START B<lond> YOURSELF.)
2491:
2492: =head1 DESCRIPTION
2493:
2494: There are two characteristics associated with the running of B<lond>,
2495: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2496: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2497: subscriptions, etc). These are described in two large
2498: sections below.
2499:
2500: B<PROCESS MANAGEMENT>
2501:
2502: Preforker - server who forks first. Runs as a daemon. HUPs.
2503: Uses IDEA encryption
2504:
2505: B<lond> forks off children processes that correspond to the other servers
2506: in the network. Management of these processes can be done at the
2507: parent process level or the child process level.
2508:
2509: B<logs/lond.log> is the location of log messages.
2510:
2511: The process management is now explained in terms of linux shell commands,
2512: subroutines internal to this code, and signal assignments:
2513:
2514: =over 4
2515:
2516: =item *
2517:
2518: PID is stored in B<logs/lond.pid>
2519:
2520: This is the process id number of the parent B<lond> process.
2521:
2522: =item *
2523:
2524: SIGTERM and SIGINT
2525:
2526: Parent signal assignment:
2527: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2528:
2529: Child signal assignment:
2530: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2531: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2532: to restart a new child.)
2533:
2534: Command-line invocations:
2535: B<kill> B<-s> SIGTERM I<PID>
2536: B<kill> B<-s> SIGINT I<PID>
2537:
2538: Subroutine B<HUNTSMAN>:
2539: This is only invoked for the B<lond> parent I<PID>.
2540: This kills all the children, and then the parent.
2541: The B<lonc.pid> file is cleared.
2542:
2543: =item *
2544:
2545: SIGHUP
2546:
2547: Current bug:
2548: This signal can only be processed the first time
2549: on the parent process. Subsequent SIGHUP signals
2550: have no effect.
2551:
2552: Parent signal assignment:
2553: $SIG{HUP} = \&HUPSMAN;
2554:
2555: Child signal assignment:
2556: none (nothing happens)
2557:
2558: Command-line invocations:
2559: B<kill> B<-s> SIGHUP I<PID>
2560:
2561: Subroutine B<HUPSMAN>:
2562: This is only invoked for the B<lond> parent I<PID>,
2563: This kills all the children, and then the parent.
2564: The B<lond.pid> file is cleared.
2565:
2566: =item *
2567:
2568: SIGUSR1
2569:
2570: Parent signal assignment:
2571: $SIG{USR1} = \&USRMAN;
2572:
2573: Child signal assignment:
2574: $SIG{USR1}= \&logstatus;
2575:
2576: Command-line invocations:
2577: B<kill> B<-s> SIGUSR1 I<PID>
2578:
2579: Subroutine B<USRMAN>:
2580: When invoked for the B<lond> parent I<PID>,
2581: SIGUSR1 is sent to all the children, and the status of
2582: each connection is logged.
2583:
2584: =item *
2585:
2586: SIGUSR2
2587:
2588: Parent Signal assignment:
2589: $SIG{USR2} = \&UpdateHosts
2590:
2591: Child signal assignment:
2592: NONE
2593:
2594:
2595: =item *
2596:
2597: SIGCHLD
2598:
2599: Parent signal assignment:
2600: $SIG{CHLD} = \&REAPER;
2601:
2602: Child signal assignment:
2603: none
2604:
2605: Command-line invocations:
2606: B<kill> B<-s> SIGCHLD I<PID>
2607:
2608: Subroutine B<REAPER>:
2609: This is only invoked for the B<lond> parent I<PID>.
2610: Information pertaining to the child is removed.
2611: The socket port is cleaned up.
2612:
2613: =back
2614:
2615: B<SERVER-SIDE ACTIVITIES>
2616:
2617: Server-side information can be accepted in an encrypted or non-encrypted
2618: method.
2619:
2620: =over 4
2621:
2622: =item ping
2623:
2624: Query a client in the hosts.tab table; "Are you there?"
2625:
2626: =item pong
2627:
2628: Respond to a ping query.
2629:
2630: =item ekey
2631:
2632: Read in encrypted key, make cipher. Respond with a buildkey.
2633:
2634: =item load
2635:
2636: Respond with CPU load based on a computation upon /proc/loadavg.
2637:
2638: =item currentauth
2639:
2640: Reply with current authentication information (only over an
2641: encrypted channel).
2642:
2643: =item auth
2644:
2645: Only over an encrypted channel, reply as to whether a user's
2646: authentication information can be validated.
2647:
2648: =item passwd
2649:
2650: Allow for a password to be set.
2651:
2652: =item makeuser
2653:
2654: Make a user.
2655:
2656: =item passwd
2657:
2658: Allow for authentication mechanism and password to be changed.
2659:
2660: =item home
2661:
2662: Respond to a question "are you the home for a given user?"
2663:
2664: =item update
2665:
2666: Update contents of a subscribed resource.
2667:
2668: =item unsubscribe
2669:
2670: The server is unsubscribing from a resource.
2671:
2672: =item subscribe
2673:
2674: The server is subscribing to a resource.
2675:
2676: =item log
2677:
2678: Place in B<logs/lond.log>
2679:
2680: =item put
2681:
2682: stores hash in namespace
2683:
2684: =item rolesput
2685:
2686: put a role into a user's environment
2687:
2688: =item get
2689:
2690: returns hash with keys from array
2691: reference filled in from namespace
2692:
2693: =item eget
2694:
2695: returns hash with keys from array
2696: reference filled in from namesp (encrypts the return communication)
2697:
2698: =item rolesget
2699:
2700: get a role from a user's environment
2701:
2702: =item del
2703:
2704: deletes keys out of array from namespace
2705:
2706: =item keys
2707:
2708: returns namespace keys
2709:
2710: =item dump
2711:
2712: dumps the complete (or key matching regexp) namespace into a hash
2713:
2714: =item store
2715:
2716: stores hash permanently
2717: for this url; hashref needs to be given and should be a \%hashname; the
2718: remaining args aren't required and if they aren't passed or are '' they will
2719: be derived from the ENV
2720:
2721: =item restore
2722:
2723: returns a hash for a given url
2724:
2725: =item querysend
2726:
2727: Tells client about the lonsql process that has been launched in response
2728: to a sent query.
2729:
2730: =item queryreply
2731:
2732: Accept information from lonsql and make appropriate storage in temporary
2733: file space.
2734:
2735: =item idput
2736:
2737: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2738: for each student, defined perhaps by the institutional Registrar.)
2739:
2740: =item idget
2741:
2742: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2743: for each student, defined perhaps by the institutional Registrar.)
2744:
2745: =item tmpput
2746:
2747: Accept and store information in temporary space.
2748:
2749: =item tmpget
2750:
2751: Send along temporarily stored information.
2752:
2753: =item ls
2754:
2755: List part of a user's directory.
2756:
2757: =item pushtable
2758:
2759: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
2760: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
2761: must be restored manually in case of a problem with the new table file.
2762: pushtable requires that the request be encrypted and validated via
2763: ValidateManager. The form of the command is:
2764: enc:pushtable tablename <tablecontents> \n
2765: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
2766: cleartext newline.
2767:
2768: =item Hanging up (exit or init)
2769:
2770: What to do when a client tells the server that they (the client)
2771: are leaving the network.
2772:
2773: =item unknown command
2774:
2775: If B<lond> is sent an unknown command (not in the list above),
2776: it replys to the client "unknown_cmd".
2777:
2778:
2779: =item UNKNOWN CLIENT
2780:
2781: If the anti-spoofing algorithm cannot verify the client,
2782: the client is rejected (with a "refused" message sent
2783: to the client, and the connection is closed.
2784:
2785: =back
2786:
2787: =head1 PREREQUISITES
2788:
2789: IO::Socket
2790: IO::File
2791: Apache::File
2792: Symbol
2793: POSIX
2794: Crypt::IDEA
2795: LWP::UserAgent()
2796: GDBM_File
2797: Authen::Krb4
2798: Authen::Krb5
2799:
2800: =head1 COREQUISITES
2801:
2802: =head1 OSNAMES
2803:
2804: linux
2805:
2806: =head1 SCRIPT CATEGORIES
2807:
2808: Server/Process
2809:
2810: =cut
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