File:
[LON-CAPA] /
loncom /
lond
Revision
1.221:
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Mon Aug 2 20:59:46 2004 UTC (19 years, 9 months ago) by
albertel
Branches:
MAIN
CVS tags:
HEAD
- the children hash is becoming polluted, and 'checkchildren' currently takes 1 second per entry in the children has to check the existance of children, during this time lond refuses all connections (as it should) this is leading to hosts being marked dead when they really are 'checking their children'
this patche
- eliminates the 1 second sleep, we now do locked access to the log file
- switches the order of the logging to the commmon log file
and the child specific one, since the child specific one is
used as a detection that the child has gone off to never never land
- deletes entries from the children hash when checkchildren can't find it
- this should hopefully fix the problems being seen on s1-5,10,17
- planning to backport, and will install on s17 today
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.221 2004/08/02 20:59:46 albertel 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:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
36: use IO::Socket;
37: use IO::File;
38: #use Apache::File;
39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
43: use GDBM_File;
44: use Authen::Krb4;
45: use Authen::Krb5;
46: use lib '/home/httpd/lib/perl/';
47: use localauth;
48: use localenroll;
49: use File::Copy;
50: use LONCAPA::ConfigFileEdit;
51: use LONCAPA::lonlocal;
52: use LONCAPA::lonssl;
53: use Fcntl qw(:flock);
54:
55: my $DEBUG = 0; # Non zero to enable debug log entries.
56:
57: my $status='';
58: my $lastlog='';
59:
60: my $VERSION='$Revision: 1.221 $'; #' stupid emacs
61: my $remoteVERSION;
62: my $currenthostid="default";
63: my $currentdomainid;
64:
65: my $client;
66: my $clientip; # IP address of client.
67: my $clientdns; # DNS name of client.
68: my $clientname; # LonCAPA name of client.
69:
70: my $server;
71: my $thisserver; # DNS of us.
72:
73: my $keymode;
74:
75: my $cipher; # Cipher key negotiated with client
76: my $tmpsnum = 0; # Id of tmpputs.
77:
78: #
79: # Connection type is:
80: # client - All client actions are allowed
81: # manager - only management functions allowed.
82: # both - Both management and client actions are allowed
83: #
84:
85: my $ConnectionType;
86:
87: my %hostid; # ID's for hosts in cluster by ip.
88: my %hostdom; # LonCAPA domain for hosts in cluster.
89: my %hostip; # IPs for hosts in cluster.
90: my %hostdns; # ID's of hosts looked up by DNS name.
91:
92: my %managers; # Ip -> manager names
93:
94: my %perlvar; # Will have the apache conf defined perl vars.
95:
96: #
97: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
98: # Each element of the hash contains a reference to an array that contains:
99: # A reference to a sub that executes the request corresponding to the keyword.
100: # A flag that is true if the request must be encoded to be acceptable.
101: # A mask with bits as follows:
102: # CLIENT_OK - Set when the function is allowed by ordinary clients
103: # MANAGER_OK - Set when the function is allowed to manager clients.
104: #
105: my $CLIENT_OK = 1;
106: my $MANAGER_OK = 2;
107: my %Dispatcher;
108:
109:
110: #
111: # The array below are password error strings."
112: #
113: my $lastpwderror = 13; # Largest error number from lcpasswd.
114: my @passwderrors = ("ok",
115: "lcpasswd must be run as user 'www'",
116: "lcpasswd got incorrect number of arguments",
117: "lcpasswd did not get the right nubmer of input text lines",
118: "lcpasswd too many simultaneous pwd changes in progress",
119: "lcpasswd User does not exist.",
120: "lcpasswd Incorrect current passwd",
121: "lcpasswd Unable to su to root.",
122: "lcpasswd Cannot set new passwd.",
123: "lcpasswd Username has invalid characters",
124: "lcpasswd Invalid characters in password",
125: "11", "12",
126: "lcpasswd Password mismatch");
127:
128:
129: # The array below are lcuseradd error strings.:
130:
131: my $lastadderror = 13;
132: my @adderrors = ("ok",
133: "User ID mismatch, lcuseradd must run as user www",
134: "lcuseradd Incorrect number of command line parameters must be 3",
135: "lcuseradd Incorrect number of stdinput lines, must be 3",
136: "lcuseradd Too many other simultaneous pwd changes in progress",
137: "lcuseradd User does not exist",
138: "lcuseradd Unable to make www member of users's group",
139: "lcuseradd Unable to su to root",
140: "lcuseradd Unable to set password",
141: "lcuseradd Usrname has invalid characters",
142: "lcuseradd Password has an invalid character",
143: "lcuseradd User already exists",
144: "lcuseradd Could not add user.",
145: "lcuseradd Password mismatch");
146:
147:
148:
149: #
150: # Statistics that are maintained and dislayed in the status line.
151: #
152: my $Transactions = 0; # Number of attempted transactions.
153: my $Failures = 0; # Number of transcations failed.
154:
155: # ResetStatistics:
156: # Resets the statistics counters:
157: #
158: sub ResetStatistics {
159: $Transactions = 0;
160: $Failures = 0;
161: }
162:
163:
164:
165: #------------------------------------------------------------------------
166: #
167: # LocalConnection
168: # Completes the formation of a locally authenticated connection.
169: # This function will ensure that the 'remote' client is really the
170: # local host. If not, the connection is closed, and the function fails.
171: # If so, initcmd is parsed for the name of a file containing the
172: # IDEA session key. The fie is opened, read, deleted and the session
173: # key returned to the caller.
174: #
175: # Parameters:
176: # $Socket - Socket open on client.
177: # $initcmd - The full text of the init command.
178: #
179: # Implicit inputs:
180: # $clientdns - The DNS name of the remote client.
181: # $thisserver - Our DNS name.
182: #
183: # Returns:
184: # IDEA session key on success.
185: # undef on failure.
186: #
187: sub LocalConnection {
188: my ($Socket, $initcmd) = @_;
189: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
190: if($clientdns ne $thisserver) {
191: &logthis('<font color="red"> LocalConnection rejecting non local: '
192: ."$clientdns ne $thisserver </font>");
193: close $Socket;
194: return undef;
195: }
196: else {
197: chomp($initcmd); # Get rid of \n in filename.
198: my ($init, $type, $name) = split(/:/, $initcmd);
199: Debug(" Init command: $init $type $name ");
200:
201: # Require that $init = init, and $type = local: Otherwise
202: # the caller is insane:
203:
204: if(($init ne "init") && ($type ne "local")) {
205: &logthis('<font color = "red"> LocalConnection: caller is insane! '
206: ."init = $init, and type = $type </font>");
207: close($Socket);;
208: return undef;
209:
210: }
211: # Now get the key filename:
212:
213: my $IDEAKey = lonlocal::ReadKeyFile($name);
214: return $IDEAKey;
215: }
216: }
217: #------------------------------------------------------------------------------
218: #
219: # SSLConnection
220: # Completes the formation of an ssh authenticated connection. The
221: # socket is promoted to an ssl socket. If this promotion and the associated
222: # certificate exchange are successful, the IDEA key is generated and sent
223: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
224: # the caller after the SSL tunnel is torn down.
225: #
226: # Parameters:
227: # Name Type Purpose
228: # $Socket IO::Socket::INET Plaintext socket.
229: #
230: # Returns:
231: # IDEA key on success.
232: # undef on failure.
233: #
234: sub SSLConnection {
235: my $Socket = shift;
236:
237: Debug("SSLConnection: ");
238: my $KeyFile = lonssl::KeyFile();
239: if(!$KeyFile) {
240: my $err = lonssl::LastError();
241: &logthis("<font color=\"red\"> CRITICAL"
242: ."Can't get key file $err </font>");
243: return undef;
244: }
245: my ($CACertificate,
246: $Certificate) = lonssl::CertificateFile();
247:
248:
249: # If any of the key, certificate or certificate authority
250: # certificate filenames are not defined, this can't work.
251:
252: if((!$Certificate) || (!$CACertificate)) {
253: my $err = lonssl::LastError();
254: &logthis("<font color=\"red\"> CRITICAL"
255: ."Can't get certificates: $err </font>");
256:
257: return undef;
258: }
259: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
260:
261: # Indicate to our peer that we can procede with
262: # a transition to ssl authentication:
263:
264: print $Socket "ok:ssl\n";
265:
266: Debug("Approving promotion -> ssl");
267: # And do so:
268:
269: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
270: $CACertificate,
271: $Certificate,
272: $KeyFile);
273: if(! ($SSLSocket) ) { # SSL socket promotion failed.
274: my $err = lonssl::LastError();
275: &logthis("<font color=\"red\"> CRITICAL "
276: ."SSL Socket promotion failed: $err </font>");
277: return undef;
278: }
279: Debug("SSL Promotion successful");
280:
281: #
282: # The only thing we'll use the socket for is to send the IDEA key
283: # to the peer:
284:
285: my $Key = lonlocal::CreateCipherKey();
286: print $SSLSocket "$Key\n";
287:
288: lonssl::Close($SSLSocket);
289:
290: Debug("Key exchange complete: $Key");
291:
292: return $Key;
293: }
294: #
295: # InsecureConnection:
296: # If insecure connections are allowd,
297: # exchange a challenge with the client to 'validate' the
298: # client (not really, but that's the protocol):
299: # We produce a challenge string that's sent to the client.
300: # The client must then echo the challenge verbatim to us.
301: #
302: # Parameter:
303: # Socket - Socket open on the client.
304: # Returns:
305: # 1 - success.
306: # 0 - failure (e.g.mismatch or insecure not allowed).
307: #
308: sub InsecureConnection {
309: my $Socket = shift;
310:
311: # Don't even start if insecure connections are not allowed.
312:
313: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
314: return 0;
315: }
316:
317: # Fabricate a challenge string and send it..
318:
319: my $challenge = "$$".time; # pid + time.
320: print $Socket "$challenge\n";
321: &status("Waiting for challenge reply");
322:
323: my $answer = <$Socket>;
324: $answer =~s/\W//g;
325: if($challenge eq $answer) {
326: return 1;
327: }
328: else {
329: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
330: &status("No challenge reqply");
331: return 0;
332: }
333:
334:
335: }
336:
337: #
338: # GetCertificate: Given a transaction that requires a certificate,
339: # this function will extract the certificate from the transaction
340: # request. Note that at this point, the only concept of a certificate
341: # is the hostname to which we are connected.
342: #
343: # Parameter:
344: # request - The request sent by our client (this parameterization may
345: # need to change when we really use a certificate granting
346: # authority.
347: #
348: sub GetCertificate {
349: my $request = shift;
350:
351: return $clientip;
352: }
353:
354: #
355: # Return true if client is a manager.
356: #
357: sub isManager {
358: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
359: }
360: #
361: # Return tru if client can do client functions
362: #
363: sub isClient {
364: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
365: }
366:
367:
368: #
369: # ReadManagerTable: Reads in the current manager table. For now this is
370: # done on each manager authentication because:
371: # - These authentications are not frequent
372: # - This allows dynamic changes to the manager table
373: # without the need to signal to the lond.
374: #
375:
376: sub ReadManagerTable {
377:
378: # Clean out the old table first..
379:
380: foreach my $key (keys %managers) {
381: delete $managers{$key};
382: }
383:
384: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
385: if (!open (MANAGERS, $tablename)) {
386: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
387: return;
388: }
389: while(my $host = <MANAGERS>) {
390: chomp($host);
391: if ($host =~ "^#") { # Comment line.
392: next;
393: }
394: if (!defined $hostip{$host}) { # This is a non cluster member
395: # The entry is of the form:
396: # cluname:hostname
397: # cluname - A 'cluster hostname' is needed in order to negotiate
398: # the host key.
399: # hostname- The dns name of the host.
400: #
401: my($cluname, $dnsname) = split(/:/, $host);
402:
403: my $ip = gethostbyname($dnsname);
404: if(defined($ip)) { # bad names don't deserve entry.
405: my $hostip = inet_ntoa($ip);
406: $managers{$hostip} = $cluname;
407: logthis('<font color="green"> registering manager '.
408: "$dnsname as $cluname with $hostip </font>\n");
409: }
410: } else {
411: logthis('<font color="green"> existing host'." $host</font>\n");
412: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
413: }
414: }
415: }
416:
417: #
418: # ValidManager: Determines if a given certificate represents a valid manager.
419: # in this primitive implementation, the 'certificate' is
420: # just the connecting loncapa client name. This is checked
421: # against a valid client list in the configuration.
422: #
423: #
424: sub ValidManager {
425: my $certificate = shift;
426:
427: return isManager;
428: }
429: #
430: # CopyFile: Called as part of the process of installing a
431: # new configuration file. This function copies an existing
432: # file to a backup file.
433: # Parameters:
434: # oldfile - Name of the file to backup.
435: # newfile - Name of the backup file.
436: # Return:
437: # 0 - Failure (errno has failure reason).
438: # 1 - Success.
439: #
440: sub CopyFile {
441:
442: my ($oldfile, $newfile) = @_;
443:
444: # The file must exist:
445:
446: if(-e $oldfile) {
447:
448: # Read the old file.
449:
450: my $oldfh = IO::File->new("< $oldfile");
451: if(!$oldfh) {
452: return 0;
453: }
454: my @contents = <$oldfh>; # Suck in the entire file.
455:
456: # write the backup file:
457:
458: my $newfh = IO::File->new("> $newfile");
459: if(!(defined $newfh)){
460: return 0;
461: }
462: my $lines = scalar @contents;
463: for (my $i =0; $i < $lines; $i++) {
464: print $newfh ($contents[$i]);
465: }
466:
467: $oldfh->close;
468: $newfh->close;
469:
470: chmod(0660, $newfile);
471:
472: return 1;
473:
474: } else {
475: return 0;
476: }
477: }
478: #
479: # Host files are passed out with externally visible host IPs.
480: # If, for example, we are behind a fire-wall or NAT host, our
481: # internally visible IP may be different than the externally
482: # visible IP. Therefore, we always adjust the contents of the
483: # host file so that the entry for ME is the IP that we believe
484: # we have. At present, this is defined as the entry that
485: # DNS has for us. If by some chance we are not able to get a
486: # DNS translation for us, then we assume that the host.tab file
487: # is correct.
488: # BUGBUGBUG - in the future, we really should see if we can
489: # easily query the interface(s) instead.
490: # Parameter(s):
491: # contents - The contents of the host.tab to check.
492: # Returns:
493: # newcontents - The adjusted contents.
494: #
495: #
496: sub AdjustHostContents {
497: my $contents = shift;
498: my $adjusted;
499: my $me = $perlvar{'lonHostID'};
500:
501: foreach my $line (split(/\n/,$contents)) {
502: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
503: chomp($line);
504: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
505: if ($id eq $me) {
506: my $ip = gethostbyname($name);
507: my $ipnew = inet_ntoa($ip);
508: $ip = $ipnew;
509: # Reconstruct the host line and append to adjusted:
510:
511: my $newline = "$id:$domain:$role:$name:$ip";
512: if($maxcon ne "") { # Not all hosts have loncnew tuning params
513: $newline .= ":$maxcon:$idleto:$mincon";
514: }
515: $adjusted .= $newline."\n";
516:
517: } else { # Not me, pass unmodified.
518: $adjusted .= $line."\n";
519: }
520: } else { # Blank or comment never re-written.
521: $adjusted .= $line."\n"; # Pass blanks and comments as is.
522: }
523: }
524: return $adjusted;
525: }
526: #
527: # InstallFile: Called to install an administrative file:
528: # - The file is created with <name>.tmp
529: # - The <name>.tmp file is then mv'd to <name>
530: # This lugubrious procedure is done to ensure that we are never without
531: # a valid, even if dated, version of the file regardless of who crashes
532: # and when the crash occurs.
533: #
534: # Parameters:
535: # Name of the file
536: # File Contents.
537: # Return:
538: # nonzero - success.
539: # 0 - failure and $! has an errno.
540: #
541: sub InstallFile {
542:
543: my ($Filename, $Contents) = @_;
544: my $TempFile = $Filename.".tmp";
545:
546: # Open the file for write:
547:
548: my $fh = IO::File->new("> $TempFile"); # Write to temp.
549: if(!(defined $fh)) {
550: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
551: return 0;
552: }
553: # write the contents of the file:
554:
555: print $fh ($Contents);
556: $fh->close; # In case we ever have a filesystem w. locking
557:
558: chmod(0660, $TempFile);
559:
560: # Now we can move install the file in position.
561:
562: move($TempFile, $Filename);
563:
564: return 1;
565: }
566:
567:
568: #
569: # ConfigFileFromSelector: converts a configuration file selector
570: # (one of host or domain at this point) into a
571: # configuration file pathname.
572: #
573: # Parameters:
574: # selector - Configuration file selector.
575: # Returns:
576: # Full path to the file or undef if the selector is invalid.
577: #
578: sub ConfigFileFromSelector {
579: my $selector = shift;
580: my $tablefile;
581:
582: my $tabledir = $perlvar{'lonTabDir'}.'/';
583: if ($selector eq "hosts") {
584: $tablefile = $tabledir."hosts.tab";
585: } elsif ($selector eq "domain") {
586: $tablefile = $tabledir."domain.tab";
587: } else {
588: return undef;
589: }
590: return $tablefile;
591:
592: }
593: #
594: # PushFile: Called to do an administrative push of a file.
595: # - Ensure the file being pushed is one we support.
596: # - Backup the old file to <filename.saved>
597: # - Separate the contents of the new file out from the
598: # rest of the request.
599: # - Write the new file.
600: # Parameter:
601: # Request - The entire user request. This consists of a : separated
602: # string pushfile:tablename:contents.
603: # NOTE: The contents may have :'s in it as well making things a bit
604: # more interesting... but not much.
605: # Returns:
606: # String to send to client ("ok" or "refused" if bad file).
607: #
608: sub PushFile {
609: my $request = shift;
610: my ($command, $filename, $contents) = split(":", $request, 3);
611:
612: # At this point in time, pushes for only the following tables are
613: # supported:
614: # hosts.tab ($filename eq host).
615: # domain.tab ($filename eq domain).
616: # Construct the destination filename or reject the request.
617: #
618: # lonManage is supposed to ensure this, however this session could be
619: # part of some elaborate spoof that managed somehow to authenticate.
620: #
621:
622:
623: my $tablefile = ConfigFileFromSelector($filename);
624: if(! (defined $tablefile)) {
625: return "refused";
626: }
627: #
628: # >copy< the old table to the backup table
629: # don't rename in case system crashes/reboots etc. in the time
630: # window between a rename and write.
631: #
632: my $backupfile = $tablefile;
633: $backupfile =~ s/\.tab$/.old/;
634: if(!CopyFile($tablefile, $backupfile)) {
635: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
636: return "error:$!";
637: }
638: &logthis('<font color="green"> Pushfile: backed up '
639: .$tablefile." to $backupfile</font>");
640:
641: # If the file being pushed is the host file, we adjust the entry for ourself so that the
642: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
643: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
644: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
645: # that possibilty.
646:
647: if($filename eq "host") {
648: $contents = AdjustHostContents($contents);
649: }
650:
651: # Install the new file:
652:
653: if(!InstallFile($tablefile, $contents)) {
654: &logthis('<font color="red"> Pushfile: unable to install '
655: .$tablefile." $! </font>");
656: return "error:$!";
657: }
658: else {
659: &logthis('<font color="green"> Installed new '.$tablefile
660: ."</font>");
661:
662: }
663:
664:
665: # Indicate success:
666:
667: return "ok";
668:
669: }
670:
671: #
672: # Called to re-init either lonc or lond.
673: #
674: # Parameters:
675: # request - The full request by the client. This is of the form
676: # reinit:<process>
677: # where <process> is allowed to be either of
678: # lonc or lond
679: #
680: # Returns:
681: # The string to be sent back to the client either:
682: # ok - Everything worked just fine.
683: # error:why - There was a failure and why describes the reason.
684: #
685: #
686: sub ReinitProcess {
687: my $request = shift;
688:
689:
690: # separate the request (reinit) from the process identifier and
691: # validate it producing the name of the .pid file for the process.
692: #
693: #
694: my ($junk, $process) = split(":", $request);
695: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
696: if($process eq 'lonc') {
697: $processpidfile = $processpidfile."lonc.pid";
698: if (!open(PIDFILE, "< $processpidfile")) {
699: return "error:Open failed for $processpidfile";
700: }
701: my $loncpid = <PIDFILE>;
702: close(PIDFILE);
703: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
704: ."</font>");
705: kill("USR2", $loncpid);
706: } elsif ($process eq 'lond') {
707: logthis('<font color="red"> Reinitializing self (lond) </font>');
708: &UpdateHosts; # Lond is us!!
709: } else {
710: &logthis('<font color="yellow" Invalid reinit request for '.$process
711: ."</font>");
712: return "error:Invalid process identifier $process";
713: }
714: return 'ok';
715: }
716: # Validate a line in a configuration file edit script:
717: # Validation includes:
718: # - Ensuring the command is valid.
719: # - Ensuring the command has sufficient parameters
720: # Parameters:
721: # scriptline - A line to validate (\n has been stripped for what it's worth).
722: #
723: # Return:
724: # 0 - Invalid scriptline.
725: # 1 - Valid scriptline
726: # NOTE:
727: # Only the command syntax is checked, not the executability of the
728: # command.
729: #
730: sub isValidEditCommand {
731: my $scriptline = shift;
732:
733: # Line elements are pipe separated:
734:
735: my ($command, $key, $newline) = split(/\|/, $scriptline);
736: &logthis('<font color="green"> isValideditCommand checking: '.
737: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
738:
739: if ($command eq "delete") {
740: #
741: # key with no newline.
742: #
743: if( ($key eq "") || ($newline ne "")) {
744: return 0; # Must have key but no newline.
745: } else {
746: return 1; # Valid syntax.
747: }
748: } elsif ($command eq "replace") {
749: #
750: # key and newline:
751: #
752: if (($key eq "") || ($newline eq "")) {
753: return 0;
754: } else {
755: return 1;
756: }
757: } elsif ($command eq "append") {
758: if (($key ne "") && ($newline eq "")) {
759: return 1;
760: } else {
761: return 0;
762: }
763: } else {
764: return 0; # Invalid command.
765: }
766: return 0; # Should not get here!!!
767: }
768: #
769: # ApplyEdit - Applies an edit command to a line in a configuration
770: # file. It is the caller's responsiblity to validate the
771: # edit line.
772: # Parameters:
773: # $directive - A single edit directive to apply.
774: # Edit directives are of the form:
775: # append|newline - Appends a new line to the file.
776: # replace|key|newline - Replaces the line with key value 'key'
777: # delete|key - Deletes the line with key value 'key'.
778: # $editor - A config file editor object that contains the
779: # file being edited.
780: #
781: sub ApplyEdit {
782:
783: my ($directive, $editor) = @_;
784:
785: # Break the directive down into its command and its parameters
786: # (at most two at this point. The meaning of the parameters, if in fact
787: # they exist depends on the command).
788:
789: my ($command, $p1, $p2) = split(/\|/, $directive);
790:
791: if($command eq "append") {
792: $editor->Append($p1); # p1 - key p2 null.
793: } elsif ($command eq "replace") {
794: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
795: } elsif ($command eq "delete") {
796: $editor->DeleteLine($p1); # p1 - key p2 null.
797: } else { # Should not get here!!!
798: die "Invalid command given to ApplyEdit $command"
799: }
800: }
801: #
802: # AdjustOurHost:
803: # Adjusts a host file stored in a configuration file editor object
804: # for the true IP address of this host. This is necessary for hosts
805: # that live behind a firewall.
806: # Those hosts have a publicly distributed IP of the firewall, but
807: # internally must use their actual IP. We assume that a given
808: # host only has a single IP interface for now.
809: # Formal Parameters:
810: # editor - The configuration file editor to adjust. This
811: # editor is assumed to contain a hosts.tab file.
812: # Strategy:
813: # - Figure out our hostname.
814: # - Lookup the entry for this host.
815: # - Modify the line to contain our IP
816: # - Do a replace for this host.
817: sub AdjustOurHost {
818: my $editor = shift;
819:
820: # figure out who I am.
821:
822: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
823:
824: # Get my host file entry.
825:
826: my $ConfigLine = $editor->Find($myHostName);
827: if(! (defined $ConfigLine)) {
828: die "AdjustOurHost - no entry for me in hosts file $myHostName";
829: }
830: # figure out my IP:
831: # Use the config line to get my hostname.
832: # Use gethostbyname to translate that into an IP address.
833: #
834: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
835: my $BinaryIp = gethostbyname($name);
836: my $ip = inet_ntoa($ip);
837: #
838: # Reassemble the config line from the elements in the list.
839: # Note that if the loncnew items were not present before, they will
840: # be now even if they would be empty
841: #
842: my $newConfigLine = $id;
843: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
844: $newConfigLine .= ":".$item;
845: }
846: # Replace the line:
847:
848: $editor->ReplaceLine($id, $newConfigLine);
849:
850: }
851: #
852: # ReplaceConfigFile:
853: # Replaces a configuration file with the contents of a
854: # configuration file editor object.
855: # This is done by:
856: # - Copying the target file to <filename>.old
857: # - Writing the new file to <filename>.tmp
858: # - Moving <filename.tmp> -> <filename>
859: # This laborious process ensures that the system is never without
860: # a configuration file that's at least valid (even if the contents
861: # may be dated).
862: # Parameters:
863: # filename - Name of the file to modify... this is a full path.
864: # editor - Editor containing the file.
865: #
866: sub ReplaceConfigFile {
867:
868: my ($filename, $editor) = @_;
869:
870: CopyFile ($filename, $filename.".old");
871:
872: my $contents = $editor->Get(); # Get the contents of the file.
873:
874: InstallFile($filename, $contents);
875: }
876: #
877: #
878: # Called to edit a configuration table file
879: # Parameters:
880: # request - The entire command/request sent by lonc or lonManage
881: # Return:
882: # The reply to send to the client.
883: #
884: sub EditFile {
885: my $request = shift;
886:
887: # Split the command into it's pieces: edit:filetype:script
888:
889: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
890:
891: # Check the pre-coditions for success:
892:
893: if($request != "edit") { # Something is amiss afoot alack.
894: return "error:edit request detected, but request != 'edit'\n";
895: }
896: if( ($filetype ne "hosts") &&
897: ($filetype ne "domain")) {
898: return "error:edit requested with invalid file specifier: $filetype \n";
899: }
900:
901: # Split the edit script and check it's validity.
902:
903: my @scriptlines = split(/\n/, $script); # one line per element.
904: my $linecount = scalar(@scriptlines);
905: for(my $i = 0; $i < $linecount; $i++) {
906: chomp($scriptlines[$i]);
907: if(!isValidEditCommand($scriptlines[$i])) {
908: return "error:edit with bad script line: '$scriptlines[$i]' \n";
909: }
910: }
911:
912: # Execute the edit operation.
913: # - Create a config file editor for the appropriate file and
914: # - execute each command in the script:
915: #
916: my $configfile = ConfigFileFromSelector($filetype);
917: if (!(defined $configfile)) {
918: return "refused\n";
919: }
920: my $editor = ConfigFileEdit->new($configfile);
921:
922: for (my $i = 0; $i < $linecount; $i++) {
923: ApplyEdit($scriptlines[$i], $editor);
924: }
925: # If the file is the host file, ensure that our host is
926: # adjusted to have our ip:
927: #
928: if($filetype eq "host") {
929: AdjustOurHost($editor);
930: }
931: # Finally replace the current file with our file.
932: #
933: ReplaceConfigFile($configfile, $editor);
934:
935: return "ok\n";
936: }
937:
938: #---------------------------------------------------------------
939: #
940: # Manipulation of hash based databases (factoring out common code
941: # for later use as we refactor.
942: #
943: # Ties a domain level resource file to a hash.
944: # If requested a history entry is created in the associated hist file.
945: #
946: # Parameters:
947: # domain - Name of the domain in which the resource file lives.
948: # namespace - Name of the hash within that domain.
949: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
950: # loghead - Optional parameter, if present a log entry is created
951: # in the associated history file and this is the first part
952: # of that entry.
953: # logtail - Goes along with loghead, The actual logentry is of the
954: # form $loghead:<timestamp>:logtail.
955: # Returns:
956: # Reference to a hash bound to the db file or alternatively undef
957: # if the tie failed.
958: #
959: sub tie_domain_hash {
960: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
961:
962: # Filter out any whitespace in the domain name:
963:
964: $domain =~ s/\W//g;
965:
966: # We have enough to go on to tie the hash:
967:
968: my $user_top_dir = $perlvar{'lonUsersDir'};
969: my $domain_dir = $user_top_dir."/$domain";
970: my $resource_file = $domain_dir."/$namespace.db";
971: my %hash;
972: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
973: if (defined($loghead)) { # Need to log the operation.
974: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
975: if($logFh) {
976: my $timestamp = time;
977: print $logFh "$loghead:$timestamp:$logtail\n";
978: }
979: $logFh->close;
980: }
981: return \%hash; # Return the tied hash.
982: } else {
983: return undef; # Tie failed.
984: }
985: }
986:
987: #
988: # Ties a user's resource file to a hash.
989: # If necessary, an appropriate history
990: # log file entry is made as well.
991: # This sub factors out common code from the subs that manipulate
992: # the various gdbm files that keep keyword value pairs.
993: # Parameters:
994: # domain - Name of the domain the user is in.
995: # user - Name of the 'current user'.
996: # namespace - Namespace representing the file to tie.
997: # how - What the tie is done to (e.g. GDBM_WRCREAT().
998: # loghead - Optional first part of log entry if there may be a
999: # history file.
1000: # what - Optional tail of log entry if there may be a history
1001: # file.
1002: # Returns:
1003: # hash to which the database is tied. It's up to the caller to untie.
1004: # undef if the has could not be tied.
1005: #
1006: sub tie_user_hash {
1007: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1008:
1009: $namespace=~s/\//\_/g; # / -> _
1010: $namespace=~s/\W//g; # whitespace eliminated.
1011: my $proname = propath($domain, $user);
1012:
1013: # Tie the database.
1014:
1015: my %hash;
1016: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1017: $how, 0640)) {
1018: # If this is a namespace for which a history is kept,
1019: # make the history log entry:
1020: if (($namespace =~/^nohist\_/) && (defined($loghead))) {
1021: my $args = scalar @_;
1022: Debug(" Opening history: $namespace $args");
1023: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1024: if($hfh) {
1025: my $now = time;
1026: print $hfh "$loghead:$now:$what\n";
1027: }
1028: $hfh->close;
1029: }
1030: return \%hash;
1031: } else {
1032: return undef;
1033: }
1034:
1035: }
1036:
1037: #--------------------- Request Handlers --------------------------------------------
1038: #
1039: # By convention each request handler registers itself prior to the sub
1040: # declaration:
1041: #
1042:
1043: #++
1044: #
1045: # Handles ping requests.
1046: # Parameters:
1047: # $cmd - the actual keyword that invoked us.
1048: # $tail - the tail of the request that invoked us.
1049: # $replyfd- File descriptor connected to the client
1050: # Implicit Inputs:
1051: # $currenthostid - Global variable that carries the name of the host we are
1052: # known as.
1053: # Returns:
1054: # 1 - Ok to continue processing.
1055: # 0 - Program should exit.
1056: # Side effects:
1057: # Reply information is sent to the client.
1058:
1059: sub ping_handler {
1060: my ($cmd, $tail, $client) = @_;
1061: Debug("$cmd $tail $client .. $currenthostid:");
1062:
1063: Reply( $client,"$currenthostid\n","$cmd:$tail");
1064:
1065: return 1;
1066: }
1067: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1068:
1069: #++
1070: #
1071: # Handles pong requests. Pong replies with our current host id, and
1072: # the results of a ping sent to us via our lonc.
1073: #
1074: # Parameters:
1075: # $cmd - the actual keyword that invoked us.
1076: # $tail - the tail of the request that invoked us.
1077: # $replyfd- File descriptor connected to the client
1078: # Implicit Inputs:
1079: # $currenthostid - Global variable that carries the name of the host we are
1080: # connected to.
1081: # Returns:
1082: # 1 - Ok to continue processing.
1083: # 0 - Program should exit.
1084: # Side effects:
1085: # Reply information is sent to the client.
1086:
1087: sub pong_handler {
1088: my ($cmd, $tail, $replyfd) = @_;
1089:
1090: my $reply=&reply("ping",$clientname);
1091: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1092: return 1;
1093: }
1094: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1095:
1096: #++
1097: # Called to establish an encrypted session key with the remote client.
1098: # Note that with secure lond, in most cases this function is never
1099: # invoked. Instead, the secure session key is established either
1100: # via a local file that's locked down tight and only lives for a short
1101: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1102: # bits from /dev/urandom, rather than the predictable pattern used by
1103: # by this sub. This sub is only used in the old-style insecure
1104: # key negotiation.
1105: # Parameters:
1106: # $cmd - the actual keyword that invoked us.
1107: # $tail - the tail of the request that invoked us.
1108: # $replyfd- File descriptor connected to the client
1109: # Implicit Inputs:
1110: # $currenthostid - Global variable that carries the name of the host
1111: # known as.
1112: # $clientname - Global variable that carries the name of the hsot we're connected to.
1113: # Returns:
1114: # 1 - Ok to continue processing.
1115: # 0 - Program should exit.
1116: # Implicit Outputs:
1117: # Reply information is sent to the client.
1118: # $cipher is set with a reference to a new IDEA encryption object.
1119: #
1120: sub establish_key_handler {
1121: my ($cmd, $tail, $replyfd) = @_;
1122:
1123: my $buildkey=time.$$.int(rand 100000);
1124: $buildkey=~tr/1-6/A-F/;
1125: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1126: my $key=$currenthostid.$clientname;
1127: $key=~tr/a-z/A-Z/;
1128: $key=~tr/G-P/0-9/;
1129: $key=~tr/Q-Z/0-9/;
1130: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1131: $key=substr($key,0,32);
1132: my $cipherkey=pack("H32",$key);
1133: $cipher=new IDEA $cipherkey;
1134: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1135:
1136: return 1;
1137:
1138: }
1139: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1140:
1141:
1142: # Handler for the load command. Returns the current system load average
1143: # to the requestor.
1144: #
1145: # Parameters:
1146: # $cmd - the actual keyword that invoked us.
1147: # $tail - the tail of the request that invoked us.
1148: # $replyfd- File descriptor connected to the client
1149: # Implicit Inputs:
1150: # $currenthostid - Global variable that carries the name of the host
1151: # known as.
1152: # $clientname - Global variable that carries the name of the hsot we're connected to.
1153: # Returns:
1154: # 1 - Ok to continue processing.
1155: # 0 - Program should exit.
1156: # Side effects:
1157: # Reply information is sent to the client.
1158: sub load_handler {
1159: my ($cmd, $tail, $replyfd) = @_;
1160:
1161: # Get the load average from /proc/loadavg and calculate it as a percentage of
1162: # the allowed load limit as set by the perl global variable lonLoadLim
1163:
1164: my $loadavg;
1165: my $loadfile=IO::File->new('/proc/loadavg');
1166:
1167: $loadavg=<$loadfile>;
1168: $loadavg =~ s/\s.*//g; # Extract the first field only.
1169:
1170: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1171:
1172: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1173:
1174: return 1;
1175: }
1176: register_handler("load", \&load_handler, 0, 1, 0);
1177:
1178: #
1179: # Process the userload request. This sub returns to the client the current
1180: # user load average. It can be invoked either by clients or managers.
1181: #
1182: # Parameters:
1183: # $cmd - the actual keyword that invoked us.
1184: # $tail - the tail of the request that invoked us.
1185: # $replyfd- File descriptor connected to the client
1186: # Implicit Inputs:
1187: # $currenthostid - Global variable that carries the name of the host
1188: # known as.
1189: # $clientname - Global variable that carries the name of the hsot we're connected to.
1190: # Returns:
1191: # 1 - Ok to continue processing.
1192: # 0 - Program should exit
1193: # Implicit inputs:
1194: # whatever the userload() function requires.
1195: # Implicit outputs:
1196: # the reply is written to the client.
1197: #
1198: sub user_load_handler {
1199: my ($cmd, $tail, $replyfd) = @_;
1200:
1201: my $userloadpercent=&userload();
1202: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1203:
1204: return 1;
1205: }
1206: register_handler("userload", \&user_load_handler, 0, 1, 0);
1207:
1208: # Process a request for the authorization type of a user:
1209: # (userauth).
1210: #
1211: # Parameters:
1212: # $cmd - the actual keyword that invoked us.
1213: # $tail - the tail of the request that invoked us.
1214: # $replyfd- File descriptor connected to the client
1215: # Returns:
1216: # 1 - Ok to continue processing.
1217: # 0 - Program should exit
1218: # Implicit outputs:
1219: # The user authorization type is written to the client.
1220: #
1221: sub user_authorization_type {
1222: my ($cmd, $tail, $replyfd) = @_;
1223:
1224: my $userinput = "$cmd:$tail";
1225:
1226: # Pull the domain and username out of the command tail.
1227: # and call GetAuthType to determine the authentication type.
1228:
1229: my ($udom,$uname)=split(/:/,$tail);
1230: my $result = &GetAuthType($udom, $uname);
1231: if($result eq "nouser") {
1232: &Failure( $replyfd, "unknown_user\n", $userinput);
1233: } else {
1234: #
1235: # We only want to pass the second field from GetAuthType
1236: # for ^krb.. otherwise we'll be handing out the encrypted
1237: # password for internals e.g.
1238: #
1239: my ($type,$otherinfo) = split(/:/,$result);
1240: if($type =~ /^krb/) {
1241: $type = $result;
1242: }
1243: &Reply( $replyfd, "$type\n", $userinput);
1244: }
1245:
1246: return 1;
1247: }
1248: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1249:
1250: # Process a request by a manager to push a hosts or domain table
1251: # to us. We pick apart the command and pass it on to the subs
1252: # that already exist to do this.
1253: #
1254: # Parameters:
1255: # $cmd - the actual keyword that invoked us.
1256: # $tail - the tail of the request that invoked us.
1257: # $client - File descriptor connected to the client
1258: # Returns:
1259: # 1 - Ok to continue processing.
1260: # 0 - Program should exit
1261: # Implicit Output:
1262: # a reply is written to the client.
1263:
1264: sub push_file_handler {
1265: my ($cmd, $tail, $client) = @_;
1266:
1267: my $userinput = "$cmd:$tail";
1268:
1269: # At this time we only know that the IP of our partner is a valid manager
1270: # the code below is a hook to do further authentication (e.g. to resolve
1271: # spoofing).
1272:
1273: my $cert = &GetCertificate($userinput);
1274: if(&ValidManager($cert)) {
1275:
1276: # Now presumably we have the bona fides of both the peer host and the
1277: # process making the request.
1278:
1279: my $reply = &PushFile($userinput);
1280: &Reply($client, "$reply\n", $userinput);
1281:
1282: } else {
1283: &Failure( $client, "refused\n", $userinput);
1284: }
1285: return 1;
1286: }
1287: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1288:
1289:
1290:
1291: # Process a reinit request. Reinit requests that either
1292: # lonc or lond be reinitialized so that an updated
1293: # host.tab or domain.tab can be processed.
1294: #
1295: # Parameters:
1296: # $cmd - the actual keyword that invoked us.
1297: # $tail - the tail of the request that invoked us.
1298: # $client - File descriptor connected to the client
1299: # Returns:
1300: # 1 - Ok to continue processing.
1301: # 0 - Program should exit
1302: # Implicit output:
1303: # a reply is sent to the client.
1304: #
1305: sub reinit_process_handler {
1306: my ($cmd, $tail, $client) = @_;
1307:
1308: my $userinput = "$cmd:$tail";
1309:
1310: my $cert = &GetCertificate($userinput);
1311: if(&ValidManager($cert)) {
1312: chomp($userinput);
1313: my $reply = &ReinitProcess($userinput);
1314: &Reply( $client, "$reply\n", $userinput);
1315: } else {
1316: &Failure( $client, "refused\n", $userinput);
1317: }
1318: return 1;
1319: }
1320:
1321: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1322:
1323: # Process the editing script for a table edit operation.
1324: # the editing operation must be encrypted and requested by
1325: # a manager host.
1326: #
1327: # Parameters:
1328: # $cmd - the actual keyword that invoked us.
1329: # $tail - the tail of the request that invoked us.
1330: # $client - File descriptor connected to the client
1331: # Returns:
1332: # 1 - Ok to continue processing.
1333: # 0 - Program should exit
1334: # Implicit output:
1335: # a reply is sent to the client.
1336: #
1337: sub edit_table_handler {
1338: my ($command, $tail, $client) = @_;
1339:
1340: my $userinput = "$command:$tail";
1341:
1342: my $cert = &GetCertificate($userinput);
1343: if(&ValidManager($cert)) {
1344: my($filetype, $script) = split(/:/, $tail);
1345: if (($filetype eq "hosts") ||
1346: ($filetype eq "domain")) {
1347: if($script ne "") {
1348: &Reply($client, # BUGBUG - EditFile
1349: &EditFile($userinput), # could fail.
1350: $userinput);
1351: } else {
1352: &Failure($client,"refused\n",$userinput);
1353: }
1354: } else {
1355: &Failure($client,"refused\n",$userinput);
1356: }
1357: } else {
1358: &Failure($client,"refused\n",$userinput);
1359: }
1360: return 1;
1361: }
1362: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1363:
1364:
1365: #
1366: # Authenticate a user against the LonCAPA authentication
1367: # database. Note that there are several authentication
1368: # possibilities:
1369: # - unix - The user can be authenticated against the unix
1370: # password file.
1371: # - internal - The user can be authenticated against a purely
1372: # internal per user password file.
1373: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1374: # ticket granting authority.
1375: # - user - The person tailoring LonCAPA can supply a user authentication
1376: # mechanism that is per system.
1377: #
1378: # Parameters:
1379: # $cmd - The command that got us here.
1380: # $tail - Tail of the command (remaining parameters).
1381: # $client - File descriptor connected to client.
1382: # Returns
1383: # 0 - Requested to exit, caller should shut down.
1384: # 1 - Continue processing.
1385: # Implicit inputs:
1386: # The authentication systems describe above have their own forms of implicit
1387: # input into the authentication process that are described above.
1388: #
1389: sub authenticate_handler {
1390: my ($cmd, $tail, $client) = @_;
1391:
1392:
1393: # Regenerate the full input line
1394:
1395: my $userinput = $cmd.":".$tail;
1396:
1397: # udom - User's domain.
1398: # uname - Username.
1399: # upass - User's password.
1400:
1401: my ($udom,$uname,$upass)=split(/:/,$tail);
1402: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1403: chomp($upass);
1404: $upass=&unescape($upass);
1405:
1406: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1407: if($pwdcorrect) {
1408: &Reply( $client, "authorized\n", $userinput);
1409: #
1410: # Bad credentials: Failed to authorize
1411: #
1412: } else {
1413: &Failure( $client, "non_authorized\n", $userinput);
1414: }
1415:
1416: return 1;
1417: }
1418:
1419: register_handler("auth", \&authenticate_handler, 1, 1, 0);
1420:
1421: #---------------------------------------------------------------
1422: #
1423: # Getting, decoding and dispatching requests:
1424: #
1425:
1426: #
1427: # Get a Request:
1428: # Gets a Request message from the client. The transaction
1429: # is defined as a 'line' of text. We remove the new line
1430: # from the text line.
1431: #
1432: sub get_request {
1433: my $input = <$client>;
1434: chomp($input);
1435:
1436: Debug("get_request: Request = $input\n");
1437:
1438: &status('Processing '.$clientname.':'.$input);
1439:
1440: return $input;
1441: }
1442: #---------------------------------------------------------------
1443: #
1444: # Process a request. This sub should shrink as each action
1445: # gets farmed out into a separat sub that is registered
1446: # with the dispatch hash.
1447: #
1448: # Parameters:
1449: # user_input - The request received from the client (lonc).
1450: # Returns:
1451: # true to keep processing, false if caller should exit.
1452: #
1453: sub process_request {
1454: my ($userinput) = @_; # Easier for now to break style than to
1455: # fix all the userinput -> user_input.
1456: my $wasenc = 0; # True if request was encrypted.
1457: # ------------------------------------------------------------ See if encrypted
1458: if ($userinput =~ /^enc/) {
1459: $userinput = decipher($userinput);
1460: $wasenc=1;
1461: if(!$userinput) { # Cipher not defined.
1462: &Failure($client, "error: Encrypted data without negotated key");
1463: return 0;
1464: }
1465: }
1466: Debug("process_request: $userinput\n");
1467:
1468: #
1469: # The 'correct way' to add a command to lond is now to
1470: # write a sub to execute it and Add it to the command dispatch
1471: # hash via a call to register_handler.. The comments to that
1472: # sub should give you enough to go on to show how to do this
1473: # along with the examples that are building up as this code
1474: # is getting refactored. Until all branches of the
1475: # if/elseif monster below have been factored out into
1476: # separate procesor subs, if the dispatch hash is missing
1477: # the command keyword, we will fall through to the remainder
1478: # of the if/else chain below in order to keep this thing in
1479: # working order throughout the transmogrification.
1480:
1481: my ($command, $tail) = split(/:/, $userinput, 2);
1482: chomp($command);
1483: chomp($tail);
1484: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1485: $command =~ s/(\r)//; # And this too for parameterless commands.
1486: if(!$tail) {
1487: $tail =""; # defined but blank.
1488: }
1489:
1490: &Debug("Command received: $command, encoded = $wasenc");
1491:
1492: if(defined $Dispatcher{$command}) {
1493:
1494: my $dispatch_info = $Dispatcher{$command};
1495: my $handler = $$dispatch_info[0];
1496: my $need_encode = $$dispatch_info[1];
1497: my $client_types = $$dispatch_info[2];
1498: Debug("Matched dispatch hash: mustencode: $need_encode "
1499: ."ClientType $client_types");
1500:
1501: # Validate the request:
1502:
1503: my $ok = 1;
1504: my $requesterprivs = 0;
1505: if(&isClient()) {
1506: $requesterprivs |= $CLIENT_OK;
1507: }
1508: if(&isManager()) {
1509: $requesterprivs |= $MANAGER_OK;
1510: }
1511: if($need_encode && (!$wasenc)) {
1512: Debug("Must encode but wasn't: $need_encode $wasenc");
1513: $ok = 0;
1514: }
1515: if(($client_types & $requesterprivs) == 0) {
1516: Debug("Client not privileged to do this operation");
1517: $ok = 0;
1518: }
1519:
1520: if($ok) {
1521: Debug("Dispatching to handler $command $tail");
1522: my $keep_going = &$handler($command, $tail, $client);
1523: return $keep_going;
1524: } else {
1525: Debug("Refusing to dispatch because client did not match requirements");
1526: Failure($client, "refused\n", $userinput);
1527: return 1;
1528: }
1529:
1530: }
1531:
1532: #------------------- Commands not yet in spearate handlers. --------------
1533:
1534:
1535: # ---------------------------------------------------------------------- passwd
1536: if ($userinput =~ /^passwd/) { # encoded and client
1537: if (($wasenc==1) && isClient) {
1538: my
1539: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1540: chomp($npass);
1541: $upass=&unescape($upass);
1542: $npass=&unescape($npass);
1543: &Debug("Trying to change password for $uname");
1544: my $proname=propath($udom,$uname);
1545: my $passfilename="$proname/passwd";
1546: if (-e $passfilename) {
1547: my $realpasswd;
1548: { my $pf = IO::File->new($passfilename);
1549: $realpasswd=<$pf>; }
1550: chomp($realpasswd);
1551: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1552: if ($howpwd eq 'internal') {
1553: &Debug("internal auth");
1554: if (crypt($upass,$contentpwd) eq $contentpwd) {
1555: my $salt=time;
1556: $salt=substr($salt,6,2);
1557: my $ncpass=crypt($npass,$salt);
1558: {
1559: my $pf;
1560: if ($pf = IO::File->new(">$passfilename")) {
1561: print $pf "internal:$ncpass\n";
1562: &logthis("Result of password change for $uname: pwchange_success");
1563: print $client "ok\n";
1564: } else {
1565: &logthis("Unable to open $uname passwd to change password");
1566: print $client "non_authorized\n";
1567: }
1568: }
1569:
1570: } else {
1571: print $client "non_authorized\n";
1572: }
1573: } elsif ($howpwd eq 'unix') {
1574: # Unix means we have to access /etc/password
1575: # one way or another.
1576: # First: Make sure the current password is
1577: # correct
1578: &Debug("auth is unix");
1579: $contentpwd=(getpwnam($uname))[1];
1580: my $pwdcorrect = "0";
1581: my $pwauth_path="/usr/local/sbin/pwauth";
1582: unless ($contentpwd eq 'x') {
1583: $pwdcorrect=
1584: (crypt($upass,$contentpwd) eq $contentpwd);
1585: } elsif (-e $pwauth_path) {
1586: open PWAUTH, "|$pwauth_path" or
1587: die "Cannot invoke authentication";
1588: print PWAUTH "$uname\n$upass\n";
1589: close PWAUTH;
1590: &Debug("exited pwauth with $? ($uname,$upass) ");
1591: $pwdcorrect=($? == 0);
1592: }
1593: if ($pwdcorrect) {
1594: my $execdir=$perlvar{'lonDaemons'};
1595: &Debug("Opening lcpasswd pipeline");
1596: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1597: print $pf "$uname\n$npass\n$npass\n";
1598: close $pf;
1599: my $err = $?;
1600: my $result = ($err>0 ? 'pwchange_failure'
1601: : 'ok');
1602: &logthis("Result of password change for $uname: ".
1603: &lcpasswdstrerror($?));
1604: print $client "$result\n";
1605: } else {
1606: print $client "non_authorized\n";
1607: }
1608: } else {
1609: print $client "auth_mode_error\n";
1610: }
1611: } else {
1612: print $client "unknown_user\n";
1613: }
1614: } else {
1615: Reply($client, "refused\n", $userinput);
1616:
1617: }
1618: # -------------------------------------------------------------------- makeuser
1619: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1620: &Debug("Make user received");
1621: my $oldumask=umask(0077);
1622: if (($wasenc==1) && isClient) {
1623: my
1624: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1625: &Debug("cmd =".$cmd." $udom =".$udom.
1626: " uname=".$uname);
1627: chomp($npass);
1628: $npass=&unescape($npass);
1629: my $proname=propath($udom,$uname);
1630: my $passfilename="$proname/passwd";
1631: &Debug("Password file created will be:".
1632: $passfilename);
1633: if (-e $passfilename) {
1634: print $client "already_exists\n";
1635: } elsif ($udom ne $currentdomainid) {
1636: print $client "not_right_domain\n";
1637: } else {
1638: my @fpparts=split(/\//,$proname);
1639: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1640: my $fperror='';
1641: for (my $i=3;$i<=$#fpparts;$i++) {
1642: $fpnow.='/'.$fpparts[$i];
1643: unless (-e $fpnow) {
1644: unless (mkdir($fpnow,0777)) {
1645: $fperror="error: ".($!+0)
1646: ." mkdir failed while attempting "
1647: ."makeuser";
1648: }
1649: }
1650: }
1651: unless ($fperror) {
1652: my $result=&make_passwd_file($uname, $umode,$npass,
1653: $passfilename);
1654: print $client $result;
1655: } else {
1656: print $client "$fperror\n";
1657: }
1658: }
1659: } else {
1660: Reply($client, "refused\n", $userinput);
1661:
1662: }
1663: umask($oldumask);
1664: # -------------------------------------------------------------- changeuserauth
1665: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1666: &Debug("Changing authorization");
1667: if (($wasenc==1) && isClient) {
1668: my
1669: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1670: chomp($npass);
1671: &Debug("cmd = ".$cmd." domain= ".$udom.
1672: "uname =".$uname." umode= ".$umode);
1673: $npass=&unescape($npass);
1674: my $proname=&propath($udom,$uname);
1675: my $passfilename="$proname/passwd";
1676: if ($udom ne $currentdomainid) {
1677: print $client "not_right_domain\n";
1678: } else {
1679: my $result=&make_passwd_file($uname, $umode,$npass,
1680: $passfilename);
1681: print $client $result;
1682: }
1683: } else {
1684: Reply($client, "refused\n", $userinput);
1685:
1686: }
1687: # ------------------------------------------------------------------------ home
1688: } elsif ($userinput =~ /^home/) { # client clear or encoded
1689: if(isClient) {
1690: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1691: chomp($uname);
1692: my $proname=propath($udom,$uname);
1693: if (-e $proname) {
1694: print $client "found\n";
1695: } else {
1696: print $client "not_found\n";
1697: }
1698: } else {
1699: Reply($client, "refused\n", $userinput);
1700:
1701: }
1702: # ---------------------------------------------------------------------- update
1703: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1704: if(isClient) {
1705: my ($cmd,$fname)=split(/:/,$userinput);
1706: my $ownership=ishome($fname);
1707: if ($ownership eq 'not_owner') {
1708: if (-e $fname) {
1709: my ($dev,$ino,$mode,$nlink,
1710: $uid,$gid,$rdev,$size,
1711: $atime,$mtime,$ctime,
1712: $blksize,$blocks)=stat($fname);
1713: my $now=time;
1714: my $since=$now-$atime;
1715: if ($since>$perlvar{'lonExpire'}) {
1716: my $reply=
1717: &reply("unsub:$fname","$clientname");
1718: unlink("$fname");
1719: } else {
1720: my $transname="$fname.in.transfer";
1721: my $remoteurl=
1722: &reply("sub:$fname","$clientname");
1723: my $response;
1724: {
1725: my $ua=new LWP::UserAgent;
1726: my $request=new HTTP::Request('GET',"$remoteurl");
1727: $response=$ua->request($request,$transname);
1728: }
1729: if ($response->is_error()) {
1730: unlink($transname);
1731: my $message=$response->status_line;
1732: &logthis(
1733: "LWP GET: $message for $fname ($remoteurl)");
1734: } else {
1735: if ($remoteurl!~/\.meta$/) {
1736: my $ua=new LWP::UserAgent;
1737: my $mrequest=
1738: new HTTP::Request('GET',$remoteurl.'.meta');
1739: my $mresponse=
1740: $ua->request($mrequest,$fname.'.meta');
1741: if ($mresponse->is_error()) {
1742: unlink($fname.'.meta');
1743: }
1744: }
1745: rename($transname,$fname);
1746: }
1747: }
1748: print $client "ok\n";
1749: } else {
1750: print $client "not_found\n";
1751: }
1752: } else {
1753: print $client "rejected\n";
1754: }
1755: } else {
1756: Reply($client, "refused\n", $userinput);
1757:
1758: }
1759: # -------------------------------------- fetch a user file from a remote server
1760: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1761: if(isClient) {
1762: my ($cmd,$fname)=split(/:/,$userinput);
1763: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1764: my $udir=propath($udom,$uname).'/userfiles';
1765: unless (-e $udir) { mkdir($udir,0770); }
1766: if (-e $udir) {
1767: $ufile=~s/^[\.\~]+//;
1768: my $path = $udir;
1769: if ($ufile =~m|(.+)/([^/]+)$|) {
1770: my @parts=split('/',$1);
1771: foreach my $part (@parts) {
1772: $path .= '/'.$part;
1773: if ((-e $path)!=1) {
1774: mkdir($path,0770);
1775: }
1776: }
1777: }
1778: my $destname=$udir.'/'.$ufile;
1779: my $transname=$udir.'/'.$ufile.'.in.transit';
1780: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1781: my $response;
1782: {
1783: my $ua=new LWP::UserAgent;
1784: my $request=new HTTP::Request('GET',"$remoteurl");
1785: $response=$ua->request($request,$transname);
1786: }
1787: if ($response->is_error()) {
1788: unlink($transname);
1789: my $message=$response->status_line;
1790: &logthis("LWP GET: $message for $fname ($remoteurl)");
1791: print $client "failed\n";
1792: } else {
1793: if (!rename($transname,$destname)) {
1794: &logthis("Unable to move $transname to $destname");
1795: unlink($transname);
1796: print $client "failed\n";
1797: } else {
1798: print $client "ok\n";
1799: }
1800: }
1801: } else {
1802: print $client "not_home\n";
1803: }
1804: } else {
1805: Reply($client, "refused\n", $userinput);
1806: }
1807: # --------------------------------------------------------- remove a user file
1808: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
1809: if(isClient) {
1810: my ($cmd,$fname)=split(/:/,$userinput);
1811: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1812: &logthis("$udom - $uname - $ufile");
1813: if ($ufile =~m|/\.\./|) {
1814: # any files paths with /../ in them refuse
1815: # to deal with
1816: print $client "refused\n";
1817: } else {
1818: my $udir=propath($udom,$uname);
1819: if (-e $udir) {
1820: my $file=$udir.'/userfiles/'.$ufile;
1821: if (-e $file) {
1822: unlink($file);
1823: if (-e $file) {
1824: print $client "failed\n";
1825: } else {
1826: print $client "ok\n";
1827: }
1828: } else {
1829: print $client "not_found\n";
1830: }
1831: } else {
1832: print $client "not_home\n";
1833: }
1834: }
1835: } else {
1836: Reply($client, "refused\n", $userinput);
1837: }
1838: # ------------------------------------------ authenticate access to a user file
1839: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1840: if(isClient) {
1841: my ($cmd,$fname,$session)=split(/:/,$userinput);
1842: chomp($session);
1843: my $reply='non_auth';
1844: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1845: $session.'.id')) {
1846: while (my $line=<ENVIN>) {
1847: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1848: }
1849: close(ENVIN);
1850: print $client $reply."\n";
1851: } else {
1852: print $client "invalid_token\n";
1853: }
1854: } else {
1855: Reply($client, "refused\n", $userinput);
1856:
1857: }
1858: # ----------------------------------------------------------------- unsubscribe
1859: } elsif ($userinput =~ /^unsub/) {
1860: if(isClient) {
1861: my ($cmd,$fname)=split(/:/,$userinput);
1862: if (-e $fname) {
1863: print $client &unsub($fname,$clientip);
1864: } else {
1865: print $client "not_found\n";
1866: }
1867: } else {
1868: Reply($client, "refused\n", $userinput);
1869:
1870: }
1871: # ------------------------------------------------------------------- subscribe
1872: } elsif ($userinput =~ /^sub/) {
1873: if(isClient) {
1874: print $client &subscribe($userinput,$clientip);
1875: } else {
1876: Reply($client, "refused\n", $userinput);
1877:
1878: }
1879: # ------------------------------------------------------------- current version
1880: } elsif ($userinput =~ /^currentversion/) {
1881: if(isClient) {
1882: my ($cmd,$fname)=split(/:/,$userinput);
1883: print $client ¤tversion($fname)."\n";
1884: } else {
1885: Reply($client, "refused\n", $userinput);
1886:
1887: }
1888: # ------------------------------------------------------------------------- log
1889: } elsif ($userinput =~ /^log/) {
1890: if(isClient) {
1891: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1892: chomp($what);
1893: my $proname=propath($udom,$uname);
1894: my $now=time;
1895: {
1896: my $hfh;
1897: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1898: print $hfh "$now:$clientname:$what\n";
1899: print $client "ok\n";
1900: } else {
1901: print $client "error: ".($!+0)
1902: ." IO::File->new Failed "
1903: ."while attempting log\n";
1904: }
1905: }
1906: } else {
1907: Reply($client, "refused\n", $userinput);
1908:
1909: }
1910: # ------------------------------------------------------------------------- put
1911: } elsif ($userinput =~ /^put/) {
1912: if(isClient) {
1913: my ($cmd,$udom,$uname,$namespace,$what)
1914: =split(/:/,$userinput,5);
1915: $namespace=~s/\//\_/g;
1916: $namespace=~s/\W//g;
1917: if ($namespace ne 'roles') {
1918: chomp($what);
1919: my $proname=propath($udom,$uname);
1920: my $now=time;
1921: my @pairs=split(/\&/,$what);
1922: my %hash;
1923: if (tie(%hash,'GDBM_File',
1924: "$proname/$namespace.db",
1925: &GDBM_WRCREAT(),0640)) {
1926: unless ($namespace=~/^nohist\_/) {
1927: my $hfh;
1928: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1929: }
1930:
1931: foreach my $pair (@pairs) {
1932: my ($key,$value)=split(/=/,$pair);
1933: $hash{$key}=$value;
1934: }
1935: if (untie(%hash)) {
1936: print $client "ok\n";
1937: } else {
1938: print $client "error: ".($!+0)
1939: ." untie(GDBM) failed ".
1940: "while attempting put\n";
1941: }
1942: } else {
1943: print $client "error: ".($!)
1944: ." tie(GDBM) Failed ".
1945: "while attempting put\n";
1946: }
1947: } else {
1948: print $client "refused\n";
1949: }
1950: } else {
1951: Reply($client, "refused\n", $userinput);
1952:
1953: }
1954: # ------------------------------------------------------------------- inc
1955: } elsif ($userinput =~ /^inc:/) {
1956: if(isClient) {
1957: my ($cmd,$udom,$uname,$namespace,$what)
1958: =split(/:/,$userinput);
1959: $namespace=~s/\//\_/g;
1960: $namespace=~s/\W//g;
1961: if ($namespace ne 'roles') {
1962: chomp($what);
1963: my $proname=propath($udom,$uname);
1964: my $now=time;
1965: my @pairs=split(/\&/,$what);
1966: my %hash;
1967: if (tie(%hash,'GDBM_File',
1968: "$proname/$namespace.db",
1969: &GDBM_WRCREAT(),0640)) {
1970: unless ($namespace=~/^nohist\_/) {
1971: my $hfh;
1972: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1973: }
1974: foreach my $pair (@pairs) {
1975: my ($key,$value)=split(/=/,$pair);
1976: # We could check that we have a number...
1977: if (! defined($value) || $value eq '') {
1978: $value = 1;
1979: }
1980: $hash{$key}+=$value;
1981: }
1982: if (untie(%hash)) {
1983: print $client "ok\n";
1984: } else {
1985: print $client "error: ".($!+0)
1986: ." untie(GDBM) failed ".
1987: "while attempting inc\n";
1988: }
1989: } else {
1990: print $client "error: ".($!)
1991: ." tie(GDBM) Failed ".
1992: "while attempting inc\n";
1993: }
1994: } else {
1995: print $client "refused\n";
1996: }
1997: } else {
1998: Reply($client, "refused\n", $userinput);
1999:
2000: }
2001: # -------------------------------------------------------------------- rolesput
2002: } elsif ($userinput =~ /^rolesput/) {
2003: if(isClient) {
2004: &Debug("rolesput");
2005: if ($wasenc==1) {
2006: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2007: =split(/:/,$userinput);
2008: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2009: "user = ".$exeuser." udom=".$udom.
2010: "what = ".$what);
2011: my $namespace='roles';
2012: chomp($what);
2013: my $proname=propath($udom,$uname);
2014: my $now=time;
2015: my @pairs=split(/\&/,$what);
2016: my %hash;
2017: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2018: {
2019: my $hfh;
2020: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2021: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2022: }
2023: }
2024:
2025: foreach my $pair (@pairs) {
2026: my ($key,$value)=split(/=/,$pair);
2027: &ManagePermissions($key, $udom, $uname,
2028: &GetAuthType( $udom,
2029: $uname));
2030: $hash{$key}=$value;
2031: }
2032: if (untie(%hash)) {
2033: print $client "ok\n";
2034: } else {
2035: print $client "error: ".($!+0)
2036: ." untie(GDBM) Failed ".
2037: "while attempting rolesput\n";
2038: }
2039: } else {
2040: print $client "error: ".($!+0)
2041: ." tie(GDBM) Failed ".
2042: "while attempting rolesput\n";
2043: }
2044: } else {
2045: print $client "refused\n";
2046: }
2047: } else {
2048: Reply($client, "refused\n", $userinput);
2049:
2050: }
2051: # -------------------------------------------------------------------- rolesdel
2052: } elsif ($userinput =~ /^rolesdel/) {
2053: if(isClient) {
2054: &Debug("rolesdel");
2055: if ($wasenc==1) {
2056: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2057: =split(/:/,$userinput);
2058: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2059: "user = ".$exeuser." udom=".$udom.
2060: "what = ".$what);
2061: my $namespace='roles';
2062: chomp($what);
2063: my $proname=propath($udom,$uname);
2064: my $now=time;
2065: my @rolekeys=split(/\&/,$what);
2066: my %hash;
2067: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2068: {
2069: my $hfh;
2070: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2071: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2072: }
2073: }
2074: foreach my $key (@rolekeys) {
2075: delete $hash{$key};
2076: }
2077: if (untie(%hash)) {
2078: print $client "ok\n";
2079: } else {
2080: print $client "error: ".($!+0)
2081: ." untie(GDBM) Failed ".
2082: "while attempting rolesdel\n";
2083: }
2084: } else {
2085: print $client "error: ".($!+0)
2086: ." tie(GDBM) Failed ".
2087: "while attempting rolesdel\n";
2088: }
2089: } else {
2090: print $client "refused\n";
2091: }
2092: } else {
2093: Reply($client, "refused\n", $userinput);
2094:
2095: }
2096: # ------------------------------------------------------------------------- get
2097: } elsif ($userinput =~ /^get/) {
2098: if(isClient) {
2099: my ($cmd,$udom,$uname,$namespace,$what)
2100: =split(/:/,$userinput);
2101: $namespace=~s/\//\_/g;
2102: $namespace=~s/\W//g;
2103: chomp($what);
2104: my @queries=split(/\&/,$what);
2105: my $proname=propath($udom,$uname);
2106: my $qresult='';
2107: my %hash;
2108: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2109: for (my $i=0;$i<=$#queries;$i++) {
2110: $qresult.="$hash{$queries[$i]}&";
2111: }
2112: if (untie(%hash)) {
2113: $qresult=~s/\&$//;
2114: print $client "$qresult\n";
2115: } else {
2116: print $client "error: ".($!+0)
2117: ." untie(GDBM) Failed ".
2118: "while attempting get\n";
2119: }
2120: } else {
2121: if ($!+0 == 2) {
2122: print $client "error:No such file or ".
2123: "GDBM reported bad block error\n";
2124: } else {
2125: print $client "error: ".($!+0)
2126: ." tie(GDBM) Failed ".
2127: "while attempting get\n";
2128: }
2129: }
2130: } else {
2131: Reply($client, "refused\n", $userinput);
2132:
2133: }
2134: # ------------------------------------------------------------------------ eget
2135: } elsif ($userinput =~ /^eget/) {
2136: if (isClient) {
2137: my ($cmd,$udom,$uname,$namespace,$what)
2138: =split(/:/,$userinput);
2139: $namespace=~s/\//\_/g;
2140: $namespace=~s/\W//g;
2141: chomp($what);
2142: my @queries=split(/\&/,$what);
2143: my $proname=propath($udom,$uname);
2144: my $qresult='';
2145: my %hash;
2146: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2147: for (my $i=0;$i<=$#queries;$i++) {
2148: $qresult.="$hash{$queries[$i]}&";
2149: }
2150: if (untie(%hash)) {
2151: $qresult=~s/\&$//;
2152: if ($cipher) {
2153: my $cmdlength=length($qresult);
2154: $qresult.=" ";
2155: my $encqresult='';
2156: for
2157: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2158: $encqresult.=
2159: unpack("H16",
2160: $cipher->encrypt(substr($qresult,$encidx,8)));
2161: }
2162: print $client "enc:$cmdlength:$encqresult\n";
2163: } else {
2164: print $client "error:no_key\n";
2165: }
2166: } else {
2167: print $client "error: ".($!+0)
2168: ." untie(GDBM) Failed ".
2169: "while attempting eget\n";
2170: }
2171: } else {
2172: print $client "error: ".($!+0)
2173: ." tie(GDBM) Failed ".
2174: "while attempting eget\n";
2175: }
2176: } else {
2177: Reply($client, "refused\n", $userinput);
2178:
2179: }
2180: # ------------------------------------------------------------------------- del
2181: } elsif ($userinput =~ /^del/) {
2182: if(isClient) {
2183: my ($cmd,$udom,$uname,$namespace,$what)
2184: =split(/:/,$userinput);
2185: $namespace=~s/\//\_/g;
2186: $namespace=~s/\W//g;
2187: chomp($what);
2188: my $proname=propath($udom,$uname);
2189: my $now=time;
2190: my @keys=split(/\&/,$what);
2191: my %hash;
2192: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2193: unless ($namespace=~/^nohist\_/) {
2194: my $hfh;
2195: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }
2196: }
2197: foreach my $key (@keys) {
2198: delete($hash{$key});
2199: }
2200: if (untie(%hash)) {
2201: print $client "ok\n";
2202: } else {
2203: print $client "error: ".($!+0)
2204: ." untie(GDBM) Failed ".
2205: "while attempting del\n";
2206: }
2207: } else {
2208: print $client "error: ".($!+0)
2209: ." tie(GDBM) Failed ".
2210: "while attempting del\n";
2211: }
2212: } else {
2213: Reply($client, "refused\n", $userinput);
2214:
2215: }
2216: # ------------------------------------------------------------------------ keys
2217: } elsif ($userinput =~ /^keys/) {
2218: if(isClient) {
2219: my ($cmd,$udom,$uname,$namespace)
2220: =split(/:/,$userinput);
2221: $namespace=~s/\//\_/g;
2222: $namespace=~s/\W//g;
2223: my $proname=propath($udom,$uname);
2224: my $qresult='';
2225: my %hash;
2226: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2227: foreach my $key (keys %hash) {
2228: $qresult.="$key&";
2229: }
2230: if (untie(%hash)) {
2231: $qresult=~s/\&$//;
2232: print $client "$qresult\n";
2233: } else {
2234: print $client "error: ".($!+0)
2235: ." untie(GDBM) Failed ".
2236: "while attempting keys\n";
2237: }
2238: } else {
2239: print $client "error: ".($!+0)
2240: ." tie(GDBM) Failed ".
2241: "while attempting keys\n";
2242: }
2243: } else {
2244: Reply($client, "refused\n", $userinput);
2245:
2246: }
2247: # ----------------------------------------------------------------- dumpcurrent
2248: } elsif ($userinput =~ /^currentdump/) {
2249: if (isClient) {
2250: my ($cmd,$udom,$uname,$namespace)
2251: =split(/:/,$userinput);
2252: $namespace=~s/\//\_/g;
2253: $namespace=~s/\W//g;
2254: my $qresult='';
2255: my $proname=propath($udom,$uname);
2256: my %hash;
2257: if (tie(%hash,'GDBM_File',
2258: "$proname/$namespace.db",
2259: &GDBM_READER(),0640)) {
2260: # Structure of %data:
2261: # $data{$symb}->{$parameter}=$value;
2262: # $data{$symb}->{'v.'.$parameter}=$version;
2263: # since $parameter will be unescaped, we do not
2264: # have to worry about silly parameter names...
2265: my %data = ();
2266: while (my ($key,$value) = each(%hash)) {
2267: my ($v,$symb,$param) = split(/:/,$key);
2268: next if ($v eq 'version' || $symb eq 'keys');
2269: next if (exists($data{$symb}) &&
2270: exists($data{$symb}->{$param}) &&
2271: $data{$symb}->{'v.'.$param} > $v);
2272: $data{$symb}->{$param}=$value;
2273: $data{$symb}->{'v.'.$param}=$v;
2274: }
2275: if (untie(%hash)) {
2276: while (my ($symb,$param_hash) = each(%data)) {
2277: while(my ($param,$value) = each (%$param_hash)){
2278: next if ($param =~ /^v\./);
2279: $qresult.=$symb.':'.$param.'='.$value.'&';
2280: }
2281: }
2282: chop($qresult);
2283: print $client "$qresult\n";
2284: } else {
2285: print $client "error: ".($!+0)
2286: ." untie(GDBM) Failed ".
2287: "while attempting currentdump\n";
2288: }
2289: } else {
2290: print $client "error: ".($!+0)
2291: ." tie(GDBM) Failed ".
2292: "while attempting currentdump\n";
2293: }
2294: } else {
2295: Reply($client, "refused\n", $userinput);
2296: }
2297: # ------------------------------------------------------------------------ dump
2298: } elsif ($userinput =~ /^dump/) {
2299: if(isClient) {
2300: my ($cmd,$udom,$uname,$namespace,$regexp)
2301: =split(/:/,$userinput);
2302: $namespace=~s/\//\_/g;
2303: $namespace=~s/\W//g;
2304: if (defined($regexp)) {
2305: $regexp=&unescape($regexp);
2306: } else {
2307: $regexp='.';
2308: }
2309: my $qresult='';
2310: my $proname=propath($udom,$uname);
2311: my %hash;
2312: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2313: while (my ($key,$value) = each(%hash)) {
2314: if ($regexp eq '.') {
2315: $qresult.=$key.'='.$value.'&';
2316: } else {
2317: my $unescapeKey = &unescape($key);
2318: if (eval('$unescapeKey=~/$regexp/')) {
2319: $qresult.="$key=$value&";
2320: }
2321: }
2322: }
2323: if (untie(%hash)) {
2324: chop($qresult);
2325: print $client "$qresult\n";
2326: } else {
2327: print $client "error: ".($!+0)
2328: ." untie(GDBM) Failed ".
2329: "while attempting dump\n";
2330: }
2331: } else {
2332: print $client "error: ".($!+0)
2333: ." tie(GDBM) Failed ".
2334: "while attempting dump\n";
2335: }
2336: } else {
2337: Reply($client, "refused\n", $userinput);
2338:
2339: }
2340: # ----------------------------------------------------------------------- store
2341: } elsif ($userinput =~ /^store/) {
2342: if(isClient) {
2343: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2344: =split(/:/,$userinput);
2345: $namespace=~s/\//\_/g;
2346: $namespace=~s/\W//g;
2347: if ($namespace ne 'roles') {
2348: chomp($what);
2349: my $proname=propath($udom,$uname);
2350: my $now=time;
2351: my @pairs=split(/\&/,$what);
2352: my %hash;
2353: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2354: unless ($namespace=~/^nohist\_/) {
2355: my $hfh;
2356: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2357: print $hfh "P:$now:$rid:$what\n";
2358: }
2359: }
2360: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2361: my $key;
2362: $hash{"version:$rid"}++;
2363: my $version=$hash{"version:$rid"};
2364: my $allkeys='';
2365: foreach my $pair (@pairs) {
2366: my ($key,$value)=split(/=/,$pair);
2367: $allkeys.=$key.':';
2368: $hash{"$version:$rid:$key"}=$value;
2369: }
2370: $hash{"$version:$rid:timestamp"}=$now;
2371: $allkeys.='timestamp';
2372: $hash{"$version:keys:$rid"}=$allkeys;
2373: if (untie(%hash)) {
2374: print $client "ok\n";
2375: } else {
2376: print $client "error: ".($!+0)
2377: ." untie(GDBM) Failed ".
2378: "while attempting store\n";
2379: }
2380: } else {
2381: print $client "error: ".($!+0)
2382: ." tie(GDBM) Failed ".
2383: "while attempting store\n";
2384: }
2385: } else {
2386: print $client "refused\n";
2387: }
2388: } else {
2389: Reply($client, "refused\n", $userinput);
2390:
2391: }
2392: # --------------------------------------------------------------------- restore
2393: } elsif ($userinput =~ /^restore/) {
2394: if(isClient) {
2395: my ($cmd,$udom,$uname,$namespace,$rid)
2396: =split(/:/,$userinput);
2397: $namespace=~s/\//\_/g;
2398: $namespace=~s/\W//g;
2399: chomp($rid);
2400: my $proname=propath($udom,$uname);
2401: my $qresult='';
2402: my %hash;
2403: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2404: my $version=$hash{"version:$rid"};
2405: $qresult.="version=$version&";
2406: my $scope;
2407: for ($scope=1;$scope<=$version;$scope++) {
2408: my $vkeys=$hash{"$scope:keys:$rid"};
2409: my @keys=split(/:/,$vkeys);
2410: my $key;
2411: $qresult.="$scope:keys=$vkeys&";
2412: foreach $key (@keys) {
2413: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2414: }
2415: }
2416: if (untie(%hash)) {
2417: $qresult=~s/\&$//;
2418: print $client "$qresult\n";
2419: } else {
2420: print $client "error: ".($!+0)
2421: ." untie(GDBM) Failed ".
2422: "while attempting restore\n";
2423: }
2424: } else {
2425: print $client "error: ".($!+0)
2426: ." tie(GDBM) Failed ".
2427: "while attempting restore\n";
2428: }
2429: } else {
2430: Reply($client, "refused\n", $userinput);
2431:
2432: }
2433: # -------------------------------------------------------------------- chatsend
2434: } elsif ($userinput =~ /^chatsend/) {
2435: if(isClient) {
2436: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2437: &chatadd($cdom,$cnum,$newpost);
2438: print $client "ok\n";
2439: } else {
2440: Reply($client, "refused\n", $userinput);
2441:
2442: }
2443: # -------------------------------------------------------------------- chatretr
2444: } elsif ($userinput =~ /^chatretr/) {
2445: if(isClient) {
2446: my
2447: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2448: my $reply='';
2449: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2450: $reply.=&escape($_).':';
2451: }
2452: $reply=~s/\:$//;
2453: print $client $reply."\n";
2454: } else {
2455: Reply($client, "refused\n", $userinput);
2456:
2457: }
2458: # ------------------------------------------------------------------- querysend
2459: } elsif ($userinput =~ /^querysend/) {
2460: if (isClient) {
2461: my ($cmd,$query,
2462: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2463: $query=~s/\n*$//g;
2464: print $client "".
2465: sqlreply("$clientname\&$query".
2466: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2467: } else {
2468: Reply($client, "refused\n", $userinput);
2469:
2470: }
2471: # ------------------------------------------------------------------ queryreply
2472: } elsif ($userinput =~ /^queryreply/) {
2473: if(isClient) {
2474: my ($cmd,$id,$reply)=split(/:/,$userinput);
2475: my $store;
2476: my $execdir=$perlvar{'lonDaemons'};
2477: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2478: $reply=~s/\&/\n/g;
2479: print $store $reply;
2480: close $store;
2481: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2482: print $store2 "done\n";
2483: close $store2;
2484: print $client "ok\n";
2485: }
2486: else {
2487: print $client "error: ".($!+0)
2488: ." IO::File->new Failed ".
2489: "while attempting queryreply\n";
2490: }
2491: } else {
2492: Reply($client, "refused\n", $userinput);
2493:
2494: }
2495: # ----------------------------------------------------------------- courseidput
2496: } elsif ($userinput =~ /^courseidput/) {
2497: if(isClient) {
2498: my ($cmd,$udom,$what)=split(/:/,$userinput);
2499: chomp($what);
2500: $udom=~s/\W//g;
2501: my $proname=
2502: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2503: my $now=time;
2504: my @pairs=split(/\&/,$what);
2505: my %hash;
2506: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2507: foreach my $pair (@pairs) {
2508: my ($key,$descr,$inst_code)=split(/=/,$pair);
2509: $hash{$key}=$descr.':'.$inst_code.':'.$now;
2510: }
2511: if (untie(%hash)) {
2512: print $client "ok\n";
2513: } else {
2514: print $client "error: ".($!+0)
2515: ." untie(GDBM) Failed ".
2516: "while attempting courseidput\n";
2517: }
2518: } else {
2519: print $client "error: ".($!+0)
2520: ." tie(GDBM) Failed ".
2521: "while attempting courseidput\n";
2522: }
2523: } else {
2524: Reply($client, "refused\n", $userinput);
2525:
2526: }
2527: # ---------------------------------------------------------------- courseiddump
2528: } elsif ($userinput =~ /^courseiddump/) {
2529: if(isClient) {
2530: my ($cmd,$udom,$since,$description)
2531: =split(/:/,$userinput);
2532: if (defined($description)) {
2533: $description=&unescape($description);
2534: } else {
2535: $description='.';
2536: }
2537: unless (defined($since)) { $since=0; }
2538: my $qresult='';
2539: my $proname=
2540: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2541: my %hash;
2542: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2543: while (my ($key,$value) = each(%hash)) {
2544: my ($descr,$lasttime,$inst_code);
2545: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
2546: ($descr,$inst_code,$lasttime)=($1,$2,$3);
2547: } else {
2548: ($descr,$lasttime) = split(/\:/,$value);
2549: }
2550: if ($lasttime<$since) { next; }
2551: if ($description eq '.') {
2552: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2553: } else {
2554: my $unescapeVal = &unescape($descr);
2555: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2556: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2557: }
2558: }
2559: }
2560: if (untie(%hash)) {
2561: chop($qresult);
2562: print $client "$qresult\n";
2563: } else {
2564: print $client "error: ".($!+0)
2565: ." untie(GDBM) Failed ".
2566: "while attempting courseiddump\n";
2567: }
2568: } else {
2569: print $client "error: ".($!+0)
2570: ." tie(GDBM) Failed ".
2571: "while attempting courseiddump\n";
2572: }
2573: } else {
2574: Reply($client, "refused\n", $userinput);
2575:
2576: }
2577: # ----------------------------------------------------------------------- idput
2578: } elsif ($userinput =~ /^idput/) {
2579: if(isClient) {
2580: my ($cmd,$udom,$what)=split(/:/,$userinput);
2581: chomp($what);
2582: $udom=~s/\W//g;
2583: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2584: my $now=time;
2585: my @pairs=split(/\&/,$what);
2586: my %hash;
2587: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2588: {
2589: my $hfh;
2590: if ($hfh=IO::File->new(">>$proname.hist")) {
2591: print $hfh "P:$now:$what\n";
2592: }
2593: }
2594: foreach my $pair (@pairs) {
2595: my ($key,$value)=split(/=/,$pair);
2596: $hash{$key}=$value;
2597: }
2598: if (untie(%hash)) {
2599: print $client "ok\n";
2600: } else {
2601: print $client "error: ".($!+0)
2602: ." untie(GDBM) Failed ".
2603: "while attempting idput\n";
2604: }
2605: } else {
2606: print $client "error: ".($!+0)
2607: ." tie(GDBM) Failed ".
2608: "while attempting idput\n";
2609: }
2610: } else {
2611: Reply($client, "refused\n", $userinput);
2612:
2613: }
2614: # ----------------------------------------------------------------------- idget
2615: } elsif ($userinput =~ /^idget/) {
2616: if(isClient) {
2617: my ($cmd,$udom,$what)=split(/:/,$userinput);
2618: chomp($what);
2619: $udom=~s/\W//g;
2620: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2621: my @queries=split(/\&/,$what);
2622: my $qresult='';
2623: my %hash;
2624: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2625: for (my $i=0;$i<=$#queries;$i++) {
2626: $qresult.="$hash{$queries[$i]}&";
2627: }
2628: if (untie(%hash)) {
2629: $qresult=~s/\&$//;
2630: print $client "$qresult\n";
2631: } else {
2632: print $client "error: ".($!+0)
2633: ." untie(GDBM) Failed ".
2634: "while attempting idget\n";
2635: }
2636: } else {
2637: print $client "error: ".($!+0)
2638: ." tie(GDBM) Failed ".
2639: "while attempting idget\n";
2640: }
2641: } else {
2642: Reply($client, "refused\n", $userinput);
2643:
2644: }
2645: # ---------------------------------------------------------------------- tmpput
2646: } elsif ($userinput =~ /^tmpput/) {
2647: if(isClient) {
2648: my ($cmd,$what)=split(/:/,$userinput);
2649: my $store;
2650: $tmpsnum++;
2651: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2652: $id=~s/\W/\_/g;
2653: $what=~s/\n//g;
2654: my $execdir=$perlvar{'lonDaemons'};
2655: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2656: print $store $what;
2657: close $store;
2658: print $client "$id\n";
2659: }
2660: else {
2661: print $client "error: ".($!+0)
2662: ."IO::File->new Failed ".
2663: "while attempting tmpput\n";
2664: }
2665: } else {
2666: Reply($client, "refused\n", $userinput);
2667:
2668: }
2669:
2670: # ---------------------------------------------------------------------- tmpget
2671: } elsif ($userinput =~ /^tmpget/) {
2672: if(isClient) {
2673: my ($cmd,$id)=split(/:/,$userinput);
2674: chomp($id);
2675: $id=~s/\W/\_/g;
2676: my $store;
2677: my $execdir=$perlvar{'lonDaemons'};
2678: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2679: my $reply=<$store>;
2680: print $client "$reply\n";
2681: close $store;
2682: }
2683: else {
2684: print $client "error: ".($!+0)
2685: ."IO::File->new Failed ".
2686: "while attempting tmpget\n";
2687: }
2688: } else {
2689: Reply($client, "refused\n", $userinput);
2690:
2691: }
2692: # ---------------------------------------------------------------------- tmpdel
2693: } elsif ($userinput =~ /^tmpdel/) {
2694: if(isClient) {
2695: my ($cmd,$id)=split(/:/,$userinput);
2696: chomp($id);
2697: $id=~s/\W/\_/g;
2698: my $execdir=$perlvar{'lonDaemons'};
2699: if (unlink("$execdir/tmp/$id.tmp")) {
2700: print $client "ok\n";
2701: } else {
2702: print $client "error: ".($!+0)
2703: ."Unlink tmp Failed ".
2704: "while attempting tmpdel\n";
2705: }
2706: } else {
2707: Reply($client, "refused\n", $userinput);
2708:
2709: }
2710: # ----------------------------------------- portfolio directory list (portls)
2711: } elsif ($userinput =~ /^portls/) {
2712: if(isClient) {
2713: my ($cmd,$uname,$udom)=split(/:/,$userinput);
2714: my $udir=propath($udom,$uname).'/userfiles/portfolio';
2715: my $dirLine='';
2716: my $dirContents='';
2717: if (opendir(LSDIR,$udir.'/')){
2718: while ($dirLine = readdir(LSDIR)){
2719: $dirContents = $dirContents.$dirLine.'<br />';
2720: }
2721: } else {
2722: $dirContents = "No directory found\n";
2723: }
2724: print $client $dirContents."\n";
2725: } else {
2726: Reply($client, "refused\n", $userinput);
2727: }
2728: # -------------------------------------------------------------------------- ls
2729: } elsif ($userinput =~ /^ls/) {
2730: if(isClient) {
2731: my $obs;
2732: my $rights;
2733: my ($cmd,$ulsdir)=split(/:/,$userinput);
2734: my $ulsout='';
2735: my $ulsfn;
2736: if (-e $ulsdir) {
2737: if(-d $ulsdir) {
2738: if (opendir(LSDIR,$ulsdir)) {
2739: while ($ulsfn=readdir(LSDIR)) {
2740: undef $obs, $rights;
2741: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2742: #We do some obsolete checking here
2743: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2744: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2745: my @obsolete=<FILE>;
2746: foreach my $obsolete (@obsolete) {
2747: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2748: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2749: }
2750: }
2751: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2752: if($obs eq '1') { $ulsout.="&1"; }
2753: else { $ulsout.="&0"; }
2754: if($rights eq '1') { $ulsout.="&1:"; }
2755: else { $ulsout.="&0:"; }
2756: }
2757: closedir(LSDIR);
2758: }
2759: } else {
2760: my @ulsstats=stat($ulsdir);
2761: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2762: }
2763: } else {
2764: $ulsout='no_such_dir';
2765: }
2766: if ($ulsout eq '') { $ulsout='empty'; }
2767: print $client "$ulsout\n";
2768: } else {
2769: Reply($client, "refused\n", $userinput);
2770:
2771: }
2772: # ----------------------------------------------------------------- setannounce
2773: } elsif ($userinput =~ /^setannounce/) {
2774: if (isClient) {
2775: my ($cmd,$announcement)=split(/:/,$userinput);
2776: chomp($announcement);
2777: $announcement=&unescape($announcement);
2778: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2779: '/announcement.txt')) {
2780: print $store $announcement;
2781: close $store;
2782: print $client "ok\n";
2783: } else {
2784: print $client "error: ".($!+0)."\n";
2785: }
2786: } else {
2787: Reply($client, "refused\n", $userinput);
2788:
2789: }
2790: # ------------------------------------------------------------------ Hanging up
2791: } elsif (($userinput =~ /^exit/) ||
2792: ($userinput =~ /^init/)) { # no restrictions.
2793: &logthis(
2794: "Client $clientip ($clientname) hanging up: $userinput");
2795: print $client "bye\n";
2796: $client->shutdown(2); # shutdown the socket forcibly.
2797: $client->close();
2798: return 0;
2799:
2800: # ---------------------------------- set current host/domain
2801: } elsif ($userinput =~ /^sethost:/) {
2802: if (isClient) {
2803: print $client &sethost($userinput)."\n";
2804: } else {
2805: print $client "refused\n";
2806: }
2807: #---------------------------------- request file (?) version.
2808: } elsif ($userinput =~/^version:/) {
2809: if (isClient) {
2810: print $client &version($userinput)."\n";
2811: } else {
2812: print $client "refused\n";
2813: }
2814: #------------------------------- is auto-enrollment enabled?
2815: } elsif ($userinput =~/^autorun:/) {
2816: if (isClient) {
2817: my ($cmd,$cdom) = split(/:/,$userinput);
2818: my $outcome = &localenroll::run($cdom);
2819: print $client "$outcome\n";
2820: } else {
2821: print $client "0\n";
2822: }
2823: #------------------------------- get official sections (for auto-enrollment).
2824: } elsif ($userinput =~/^autogetsections:/) {
2825: if (isClient) {
2826: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
2827: my @secs = &localenroll::get_sections($coursecode,$cdom);
2828: my $seclist = &escape(join(':',@secs));
2829: print $client "$seclist\n";
2830: } else {
2831: print $client "refused\n";
2832: }
2833: #----------------------- validate owner of new course section (for auto-enrollment).
2834: } elsif ($userinput =~/^autonewcourse:/) {
2835: if (isClient) {
2836: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
2837: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
2838: print $client "$outcome\n";
2839: } else {
2840: print $client "refused\n";
2841: }
2842: #-------------- validate course section in schedule of classes (for auto-enrollment).
2843: } elsif ($userinput =~/^autovalidatecourse:/) {
2844: if (isClient) {
2845: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
2846: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
2847: print $client "$outcome\n";
2848: } else {
2849: print $client "refused\n";
2850: }
2851: #--------------------------- create password for new user (for auto-enrollment).
2852: } elsif ($userinput =~/^autocreatepassword:/) {
2853: if (isClient) {
2854: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
2855: my ($create_passwd,$authchk);
2856: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
2857: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2858: } else {
2859: print $client "refused\n";
2860: }
2861: #--------------------------- read and remove temporary files (for auto-enrollment).
2862: } elsif ($userinput =~/^autoretrieve:/) {
2863: if (isClient) {
2864: my ($cmd,$filename) = split(/:/,$userinput);
2865: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2866: if ( (-e $source) && ($filename ne '') ) {
2867: my $reply = '';
2868: if (open(my $fh,$source)) {
2869: while (<$fh>) {
2870: chomp($_);
2871: $_ =~ s/^\s+//g;
2872: $_ =~ s/\s+$//g;
2873: $reply .= $_;
2874: }
2875: close($fh);
2876: print $client &escape($reply)."\n";
2877: # unlink($source);
2878: } else {
2879: print $client "error\n";
2880: }
2881: } else {
2882: print $client "error\n";
2883: }
2884: } else {
2885: print $client "refused\n";
2886: }
2887: #--------------------- read and retrieve institutional code format (for support form).
2888: } elsif ($userinput =~/^autoinstcodeformat:/) {
2889: if (isClient) {
2890: my $reply;
2891: my($cmd,$cdom,$course) = split(/:/,$userinput);
2892: my @pairs = split/\&/,$course;
2893: my %instcodes = ();
2894: my %codes = ();
2895: my @codetitles = ();
2896: my %cat_titles = ();
2897: my %cat_order = ();
2898: foreach (@pairs) {
2899: my ($key,$value) = split/=/,$_;
2900: $instcodes{&unescape($key)} = &unescape($value);
2901: }
2902: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
2903: if ($formatreply eq 'ok') {
2904: my $codes_str = &hash2str(%codes);
2905: my $codetitles_str = &array2str(@codetitles);
2906: my $cat_titles_str = &hash2str(%cat_titles);
2907: my $cat_order_str = &hash2str(%cat_order);
2908: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
2909: }
2910: } else {
2911: print $client "refused\n";
2912: }
2913: # ------------------------------------------------------------- unknown command
2914:
2915: } else {
2916: # unknown command
2917: print $client "unknown_cmd\n";
2918: }
2919: # -------------------------------------------------------------------- complete
2920: Debug("process_request - returning 1");
2921: return 1;
2922: }
2923: #
2924: # Decipher encoded traffic
2925: # Parameters:
2926: # input - Encoded data.
2927: # Returns:
2928: # Decoded data or undef if encryption key was not yet negotiated.
2929: # Implicit input:
2930: # cipher - This global holds the negotiated encryption key.
2931: #
2932: sub decipher {
2933: my ($input) = @_;
2934: my $output = '';
2935:
2936:
2937: if($cipher) {
2938: my($enc, $enclength, $encinput) = split(/:/, $input);
2939: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
2940: $output .=
2941: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
2942: }
2943: return substr($output, 0, $enclength);
2944: } else {
2945: return undef;
2946: }
2947: }
2948:
2949: #
2950: # Register a command processor. This function is invoked to register a sub
2951: # to process a request. Once registered, the ProcessRequest sub can automatically
2952: # dispatch requests to an appropriate sub, and do the top level validity checking
2953: # as well:
2954: # - Is the keyword recognized.
2955: # - Is the proper client type attempting the request.
2956: # - Is the request encrypted if it has to be.
2957: # Parameters:
2958: # $request_name - Name of the request being registered.
2959: # This is the command request that will match
2960: # against the hash keywords to lookup the information
2961: # associated with the dispatch information.
2962: # $procedure - Reference to a sub to call to process the request.
2963: # All subs get called as follows:
2964: # Procedure($cmd, $tail, $replyfd, $key)
2965: # $cmd - the actual keyword that invoked us.
2966: # $tail - the tail of the request that invoked us.
2967: # $replyfd- File descriptor connected to the client
2968: # $must_encode - True if the request must be encoded to be good.
2969: # $client_ok - True if it's ok for a client to request this.
2970: # $manager_ok - True if it's ok for a manager to request this.
2971: # Side effects:
2972: # - On success, the Dispatcher hash has an entry added for the key $RequestName
2973: # - On failure, the program will die as it's a bad internal bug to try to
2974: # register a duplicate command handler.
2975: #
2976: sub register_handler {
2977: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
2978:
2979: # Don't allow duplication#
2980:
2981: if (defined $Dispatcher{$request_name}) {
2982: die "Attempting to define a duplicate request handler for $request_name\n";
2983: }
2984: # Build the client type mask:
2985:
2986: my $client_type_mask = 0;
2987: if($client_ok) {
2988: $client_type_mask |= $CLIENT_OK;
2989: }
2990: if($manager_ok) {
2991: $client_type_mask |= $MANAGER_OK;
2992: }
2993:
2994: # Enter the hash:
2995:
2996: my @entry = ($procedure, $must_encode, $client_type_mask);
2997:
2998: $Dispatcher{$request_name} = \@entry;
2999:
3000:
3001: }
3002:
3003:
3004: #------------------------------------------------------------------
3005:
3006:
3007:
3008:
3009: #
3010: # Convert an error return code from lcpasswd to a string value.
3011: #
3012: sub lcpasswdstrerror {
3013: my $ErrorCode = shift;
3014: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
3015: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3016: } else {
3017: return $passwderrors[$ErrorCode];
3018: }
3019: }
3020:
3021: #
3022: # Convert an error return code from lcuseradd to a string value:
3023: #
3024: sub lcuseraddstrerror {
3025: my $ErrorCode = shift;
3026: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3027: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3028: } else {
3029: return $adderrors[$ErrorCode];
3030: }
3031: }
3032:
3033: # grabs exception and records it to log before exiting
3034: sub catchexception {
3035: my ($error)=@_;
3036: $SIG{'QUIT'}='DEFAULT';
3037: $SIG{__DIE__}='DEFAULT';
3038: &status("Catching exception");
3039: &logthis("<font color='red'>CRITICAL: "
3040: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
3041: ."a crash with this error msg->[$error]</font>");
3042: &logthis('Famous last words: '.$status.' - '.$lastlog);
3043: if ($client) { print $client "error: $error\n"; }
3044: $server->close();
3045: die($error);
3046: }
3047:
3048: sub timeout {
3049: &status("Handling Timeout");
3050: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
3051: &catchexception('Timeout');
3052: }
3053: # -------------------------------- Set signal handlers to record abnormal exits
3054:
3055: $SIG{'QUIT'}=\&catchexception;
3056: $SIG{__DIE__}=\&catchexception;
3057:
3058: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
3059: &status("Read loncapa.conf and loncapa_apache.conf");
3060: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
3061: %perlvar=%{$perlvarref};
3062: undef $perlvarref;
3063:
3064: # ----------------------------- Make sure this process is running from user=www
3065: my $wwwid=getpwnam('www');
3066: if ($wwwid!=$<) {
3067: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3068: my $subj="LON: $currenthostid User ID mismatch";
3069: system("echo 'User ID mismatch. lond must be run as user www.' |\
3070: mailto $emailto -s '$subj' > /dev/null");
3071: exit 1;
3072: }
3073:
3074: # --------------------------------------------- Check if other instance running
3075:
3076: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3077:
3078: if (-e $pidfile) {
3079: my $lfh=IO::File->new("$pidfile");
3080: my $pide=<$lfh>;
3081: chomp($pide);
3082: if (kill 0 => $pide) { die "already running"; }
3083: }
3084:
3085: # ------------------------------------------------------------- Read hosts file
3086:
3087:
3088:
3089: # establish SERVER socket, bind and listen.
3090: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3091: Type => SOCK_STREAM,
3092: Proto => 'tcp',
3093: Reuse => 1,
3094: Listen => 10 )
3095: or die "making socket: $@\n";
3096:
3097: # --------------------------------------------------------- Do global variables
3098:
3099: # global variables
3100:
3101: my %children = (); # keys are current child process IDs
3102:
3103: sub REAPER { # takes care of dead children
3104: $SIG{CHLD} = \&REAPER;
3105: &status("Handling child death");
3106: my $pid;
3107: do {
3108: $pid = waitpid(-1,&WNOHANG());
3109: if (defined($children{$pid})) {
3110: &logthis("Child $pid died");
3111: delete($children{$pid});
3112: } elsif ($pid > 0) {
3113: &logthis("Unknown Child $pid died");
3114: }
3115: } while ( $pid > 0 );
3116: foreach my $child (keys(%children)) {
3117: $pid = waitpid($child,&WNOHANG());
3118: if ($pid > 0) {
3119: &logthis("Child $child - $pid looks like we missed it's death");
3120: delete($children{$pid});
3121: }
3122: }
3123: &status("Finished Handling child death");
3124: }
3125:
3126: sub HUNTSMAN { # signal handler for SIGINT
3127: &status("Killing children (INT)");
3128: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3129: kill 'INT' => keys %children;
3130: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3131: my $execdir=$perlvar{'lonDaemons'};
3132: unlink("$execdir/logs/lond.pid");
3133: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
3134: &status("Done killing children");
3135: exit; # clean up with dignity
3136: }
3137:
3138: sub HUPSMAN { # signal handler for SIGHUP
3139: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3140: &status("Killing children for restart (HUP)");
3141: kill 'INT' => keys %children;
3142: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3143: &logthis("<font color='red'>CRITICAL: Restarting</font>");
3144: my $execdir=$perlvar{'lonDaemons'};
3145: unlink("$execdir/logs/lond.pid");
3146: &status("Restarting self (HUP)");
3147: exec("$execdir/lond"); # here we go again
3148: }
3149:
3150: #
3151: # Kill off hashes that describe the host table prior to re-reading it.
3152: # Hashes affected are:
3153: # %hostid, %hostdom %hostip %hostdns.
3154: #
3155: sub KillHostHashes {
3156: foreach my $key (keys %hostid) {
3157: delete $hostid{$key};
3158: }
3159: foreach my $key (keys %hostdom) {
3160: delete $hostdom{$key};
3161: }
3162: foreach my $key (keys %hostip) {
3163: delete $hostip{$key};
3164: }
3165: foreach my $key (keys %hostdns) {
3166: delete $hostdns{$key};
3167: }
3168: }
3169: #
3170: # Read in the host table from file and distribute it into the various hashes:
3171: #
3172: # - %hostid - Indexed by IP, the loncapa hostname.
3173: # - %hostdom - Indexed by loncapa hostname, the domain.
3174: # - %hostip - Indexed by hostid, the Ip address of the host.
3175: sub ReadHostTable {
3176:
3177: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
3178: my $myloncapaname = $perlvar{'lonHostID'};
3179: Debug("My loncapa name is : $myloncapaname");
3180: while (my $configline=<CONFIG>) {
3181: if (!($configline =~ /^\s*\#/)) {
3182: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3183: chomp($ip); $ip=~s/\D+$//;
3184: $hostid{$ip}=$id; # LonCAPA name of host by IP.
3185: $hostdom{$id}=$domain; # LonCAPA domain name of host.
3186: $hostip{$id}=$ip; # IP address of host.
3187: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
3188:
3189: if ($id eq $perlvar{'lonHostID'}) {
3190: Debug("Found me in the host table: $name");
3191: $thisserver=$name;
3192: }
3193: }
3194: }
3195: close(CONFIG);
3196: }
3197: #
3198: # Reload the Apache daemon's state.
3199: # This is done by invoking /home/httpd/perl/apachereload
3200: # a setuid perl script that can be root for us to do this job.
3201: #
3202: sub ReloadApache {
3203: my $execdir = $perlvar{'lonDaemons'};
3204: my $script = $execdir."/apachereload";
3205: system($script);
3206: }
3207:
3208: #
3209: # Called in response to a USR2 signal.
3210: # - Reread hosts.tab
3211: # - All children connected to hosts that were removed from hosts.tab
3212: # are killed via SIGINT
3213: # - All children connected to previously existing hosts are sent SIGUSR1
3214: # - Our internal hosts hash is updated to reflect the new contents of
3215: # hosts.tab causing connections from hosts added to hosts.tab to
3216: # now be honored.
3217: #
3218: sub UpdateHosts {
3219: &status("Reload hosts.tab");
3220: logthis('<font color="blue"> Updating connections </font>');
3221: #
3222: # The %children hash has the set of IP's we currently have children
3223: # on. These need to be matched against records in the hosts.tab
3224: # Any ip's no longer in the table get killed off they correspond to
3225: # either dropped or changed hosts. Note that the re-read of the table
3226: # will take care of new and changed hosts as connections come into being.
3227:
3228:
3229: KillHostHashes;
3230: ReadHostTable;
3231:
3232: foreach my $child (keys %children) {
3233: my $childip = $children{$child};
3234: if(!$hostid{$childip}) {
3235: logthis('<font color="blue"> UpdateHosts killing child '
3236: ." $child for ip $childip </font>");
3237: kill('INT', $child);
3238: } else {
3239: logthis('<font color="green"> keeping child for ip '
3240: ." $childip (pid=$child) </font>");
3241: }
3242: }
3243: ReloadApache;
3244: &status("Finished reloading hosts.tab");
3245: }
3246:
3247:
3248: sub checkchildren {
3249: &status("Checking on the children (sending signals)");
3250: &initnewstatus();
3251: &logstatus();
3252: &logthis('Going to check on the children');
3253: my $docdir=$perlvar{'lonDocRoot'};
3254: foreach (sort keys %children) {
3255: #sleep 1;
3256: unless (kill 'USR1' => $_) {
3257: &logthis ('Child '.$_.' is dead');
3258: &logstatus($$.' is dead');
3259: delete($children{$_});
3260: }
3261: }
3262: sleep 5;
3263: $SIG{ALRM} = sub { Debug("timeout");
3264: die "timeout"; };
3265: $SIG{__DIE__} = 'DEFAULT';
3266: &status("Checking on the children (waiting for reports)");
3267: foreach (sort keys %children) {
3268: unless (-e "$docdir/lon-status/londchld/$_.txt") {
3269: eval {
3270: alarm(300);
3271: &logthis('Child '.$_.' did not respond');
3272: kill 9 => $_;
3273: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3274: #$subj="LON: $currenthostid killed lond process $_";
3275: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3276: #$execdir=$perlvar{'lonDaemons'};
3277: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3278: delete($children{$_});
3279: alarm(0);
3280: }
3281: }
3282: }
3283: $SIG{ALRM} = 'DEFAULT';
3284: $SIG{__DIE__} = \&catchexception;
3285: &status("Finished checking children");
3286: &logthis('Finished Checking children');
3287: }
3288:
3289: # --------------------------------------------------------------------- Logging
3290:
3291: sub logthis {
3292: my $message=shift;
3293: my $execdir=$perlvar{'lonDaemons'};
3294: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3295: my $now=time;
3296: my $local=localtime($now);
3297: $lastlog=$local.': '.$message;
3298: print $fh "$local ($$): $message\n";
3299: }
3300:
3301: # ------------------------- Conditional log if $DEBUG true.
3302: sub Debug {
3303: my $message = shift;
3304: if($DEBUG) {
3305: &logthis($message);
3306: }
3307: }
3308:
3309: #
3310: # Sub to do replies to client.. this gives a hook for some
3311: # debug tracing too:
3312: # Parameters:
3313: # fd - File open on client.
3314: # reply - Text to send to client.
3315: # request - Original request from client.
3316: #
3317: sub Reply {
3318: my ($fd, $reply, $request) = @_;
3319: print $fd $reply;
3320: Debug("Request was $request Reply was $reply");
3321:
3322: $Transactions++;
3323:
3324:
3325: }
3326:
3327:
3328: #
3329: # Sub to report a failure.
3330: # This function:
3331: # - Increments the failure statistic counters.
3332: # - Invokes Reply to send the error message to the client.
3333: # Parameters:
3334: # fd - File descriptor open on the client
3335: # reply - Reply text to emit.
3336: # request - The original request message (used by Reply
3337: # to debug if that's enabled.
3338: # Implicit outputs:
3339: # $Failures- The number of failures is incremented.
3340: # Reply (invoked here) sends a message to the
3341: # client:
3342: #
3343: sub Failure {
3344: my $fd = shift;
3345: my $reply = shift;
3346: my $request = shift;
3347:
3348: $Failures++;
3349: Reply($fd, $reply, $request); # That's simple eh?
3350: }
3351: # ------------------------------------------------------------------ Log status
3352:
3353: sub logstatus {
3354: &status("Doing logging");
3355: my $docdir=$perlvar{'lonDocRoot'};
3356: {
3357: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3358: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
3359: $fh->close();
3360: }
3361: &status("Finished $$.txt");
3362: {
3363: open(LOG,">>$docdir/lon-status/londstatus.txt");
3364: flock(LOG,LOCK_EX);
3365: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
3366: .$status."\t".$lastlog."\t $keymode\n";
3367: flock(DB,LOCK_UN);
3368: close(LOG);
3369: }
3370: &status("Finished logging");
3371: }
3372:
3373: sub initnewstatus {
3374: my $docdir=$perlvar{'lonDocRoot'};
3375: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3376: my $now=time;
3377: my $local=localtime($now);
3378: print $fh "LOND status $local - parent $$\n\n";
3379: opendir(DIR,"$docdir/lon-status/londchld");
3380: while (my $filename=readdir(DIR)) {
3381: unlink("$docdir/lon-status/londchld/$filename");
3382: }
3383: closedir(DIR);
3384: }
3385:
3386: # -------------------------------------------------------------- Status setting
3387:
3388: sub status {
3389: my $what=shift;
3390: my $now=time;
3391: my $local=localtime($now);
3392: $status=$local.': '.$what;
3393: $0='lond: '.$what.' '.$local;
3394: }
3395:
3396: # -------------------------------------------------------- Escape Special Chars
3397:
3398: sub escape {
3399: my $str=shift;
3400: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3401: return $str;
3402: }
3403:
3404: # ----------------------------------------------------- Un-Escape Special Chars
3405:
3406: sub unescape {
3407: my $str=shift;
3408: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3409: return $str;
3410: }
3411:
3412: # ----------------------------------------------------------- Send USR1 to lonc
3413:
3414: sub reconlonc {
3415: my $peerfile=shift;
3416: &logthis("Trying to reconnect for $peerfile");
3417: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3418: if (my $fh=IO::File->new("$loncfile")) {
3419: my $loncpid=<$fh>;
3420: chomp($loncpid);
3421: if (kill 0 => $loncpid) {
3422: &logthis("lonc at pid $loncpid responding, sending USR1");
3423: kill USR1 => $loncpid;
3424: } else {
3425: &logthis(
3426: "<font color='red'>CRITICAL: "
3427: ."lonc at pid $loncpid not responding, giving up</font>");
3428: }
3429: } else {
3430: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
3431: }
3432: }
3433:
3434: # -------------------------------------------------- Non-critical communication
3435:
3436: sub subreply {
3437: my ($cmd,$server)=@_;
3438: my $peerfile="$perlvar{'lonSockDir'}/$server";
3439: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3440: Type => SOCK_STREAM,
3441: Timeout => 10)
3442: or return "con_lost";
3443: print $sclient "$cmd\n";
3444: my $answer=<$sclient>;
3445: chomp($answer);
3446: if (!$answer) { $answer="con_lost"; }
3447: return $answer;
3448: }
3449:
3450: sub reply {
3451: my ($cmd,$server)=@_;
3452: my $answer;
3453: if ($server ne $currenthostid) {
3454: $answer=subreply($cmd,$server);
3455: if ($answer eq 'con_lost') {
3456: $answer=subreply("ping",$server);
3457: if ($answer ne $server) {
3458: &logthis("sub reply: answer != server answer is $answer, server is $server");
3459: &reconlonc("$perlvar{'lonSockDir'}/$server");
3460: }
3461: $answer=subreply($cmd,$server);
3462: }
3463: } else {
3464: $answer='self_reply';
3465: }
3466: return $answer;
3467: }
3468:
3469: # -------------------------------------------------------------- Talk to lonsql
3470:
3471: sub sqlreply {
3472: my ($cmd)=@_;
3473: my $answer=subsqlreply($cmd);
3474: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3475: return $answer;
3476: }
3477:
3478: sub subsqlreply {
3479: my ($cmd)=@_;
3480: my $unixsock="mysqlsock";
3481: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3482: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3483: Type => SOCK_STREAM,
3484: Timeout => 10)
3485: or return "con_lost";
3486: print $sclient "$cmd\n";
3487: my $answer=<$sclient>;
3488: chomp($answer);
3489: if (!$answer) { $answer="con_lost"; }
3490: return $answer;
3491: }
3492:
3493: # -------------------------------------------- Return path to profile directory
3494:
3495: sub propath {
3496: my ($udom,$uname)=@_;
3497: $udom=~s/\W//g;
3498: $uname=~s/\W//g;
3499: my $subdir=$uname.'__';
3500: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3501: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3502: return $proname;
3503: }
3504:
3505: # --------------------------------------- Is this the home server of an author?
3506:
3507: sub ishome {
3508: my $author=shift;
3509: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3510: my ($udom,$uname)=split(/\//,$author);
3511: my $proname=propath($udom,$uname);
3512: if (-e $proname) {
3513: return 'owner';
3514: } else {
3515: return 'not_owner';
3516: }
3517: }
3518:
3519: # ======================================================= Continue main program
3520: # ---------------------------------------------------- Fork once and dissociate
3521:
3522: my $fpid=fork;
3523: exit if $fpid;
3524: die "Couldn't fork: $!" unless defined ($fpid);
3525:
3526: POSIX::setsid() or die "Can't start new session: $!";
3527:
3528: # ------------------------------------------------------- Write our PID on disk
3529:
3530: my $execdir=$perlvar{'lonDaemons'};
3531: open (PIDSAVE,">$execdir/logs/lond.pid");
3532: print PIDSAVE "$$\n";
3533: close(PIDSAVE);
3534: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
3535: &status('Starting');
3536:
3537:
3538:
3539: # ----------------------------------------------------- Install signal handlers
3540:
3541:
3542: $SIG{CHLD} = \&REAPER;
3543: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3544: $SIG{HUP} = \&HUPSMAN;
3545: $SIG{USR1} = \&checkchildren;
3546: $SIG{USR2} = \&UpdateHosts;
3547:
3548: # Read the host hashes:
3549:
3550: ReadHostTable;
3551:
3552: # --------------------------------------------------------------
3553: # Accept connections. When a connection comes in, it is validated
3554: # and if good, a child process is created to process transactions
3555: # along the connection.
3556:
3557: while (1) {
3558: &status('Starting accept');
3559: $client = $server->accept() or next;
3560: &status('Accepted '.$client.' off to spawn');
3561: make_new_child($client);
3562: &status('Finished spawning');
3563: }
3564:
3565: sub make_new_child {
3566: my $pid;
3567: # my $cipher; # Now global
3568: my $sigset;
3569:
3570: $client = shift;
3571: &status('Starting new child '.$client);
3572: &logthis('<font color="green"> Attempting to start child ('.$client.
3573: ")</font>");
3574: # block signal for fork
3575: $sigset = POSIX::SigSet->new(SIGINT);
3576: sigprocmask(SIG_BLOCK, $sigset)
3577: or die "Can't block SIGINT for fork: $!\n";
3578:
3579: die "fork: $!" unless defined ($pid = fork);
3580:
3581: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3582: # connection liveness.
3583:
3584: #
3585: # Figure out who we're talking to so we can record the peer in
3586: # the pid hash.
3587: #
3588: my $caller = getpeername($client);
3589: my ($port,$iaddr);
3590: if (defined($caller) && length($caller) > 0) {
3591: ($port,$iaddr)=unpack_sockaddr_in($caller);
3592: } else {
3593: &logthis("Unable to determine who caller was, getpeername returned nothing");
3594: }
3595: if (defined($iaddr)) {
3596: $clientip = inet_ntoa($iaddr);
3597: Debug("Connected with $clientip");
3598: $clientdns = gethostbyaddr($iaddr, AF_INET);
3599: Debug("Connected with $clientdns by name");
3600: } else {
3601: &logthis("Unable to determine clientip");
3602: $clientip='Unavailable';
3603: }
3604:
3605: if ($pid) {
3606: # Parent records the child's birth and returns.
3607: sigprocmask(SIG_UNBLOCK, $sigset)
3608: or die "Can't unblock SIGINT for fork: $!\n";
3609: $children{$pid} = $clientip;
3610: &status('Started child '.$pid);
3611: return;
3612: } else {
3613: # Child can *not* return from this subroutine.
3614: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
3615: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3616: #don't get intercepted
3617: $SIG{USR1}= \&logstatus;
3618: $SIG{ALRM}= \&timeout;
3619: $lastlog='Forked ';
3620: $status='Forked';
3621:
3622: # unblock signals
3623: sigprocmask(SIG_UNBLOCK, $sigset)
3624: or die "Can't unblock SIGINT for fork: $!\n";
3625:
3626: # my $tmpsnum=0; # Now global
3627: #---------------------------------------------------- kerberos 5 initialization
3628: &Authen::Krb5::init_context();
3629: &Authen::Krb5::init_ets();
3630:
3631: &status('Accepted connection');
3632: # =============================================================================
3633: # do something with the connection
3634: # -----------------------------------------------------------------------------
3635: # see if we know client and 'check' for spoof IP by ineffective challenge
3636:
3637: ReadManagerTable; # May also be a manager!!
3638:
3639: my $clientrec=($hostid{$clientip} ne undef);
3640: my $ismanager=($managers{$clientip} ne undef);
3641: $clientname = "[unknonwn]";
3642: if($clientrec) { # Establish client type.
3643: $ConnectionType = "client";
3644: $clientname = $hostid{$clientip};
3645: if($ismanager) {
3646: $ConnectionType = "both";
3647: }
3648: } else {
3649: $ConnectionType = "manager";
3650: $clientname = $managers{$clientip};
3651: }
3652: my $clientok;
3653:
3654: if ($clientrec || $ismanager) {
3655: &status("Waiting for init from $clientip $clientname");
3656: &logthis('<font color="yellow">INFO: Connection, '.
3657: $clientip.
3658: " ($clientname) connection type = $ConnectionType </font>" );
3659: &status("Connecting $clientip ($clientname))");
3660: my $remotereq=<$client>;
3661: chomp($remotereq);
3662: Debug("Got init: $remotereq");
3663: my $inikeyword = split(/:/, $remotereq);
3664: if ($remotereq =~ /^init/) {
3665: &sethost("sethost:$perlvar{'lonHostID'}");
3666: #
3667: # If the remote is attempting a local init... give that a try:
3668: #
3669: my ($i, $inittype) = split(/:/, $remotereq);
3670:
3671: # If the connection type is ssl, but I didn't get my
3672: # certificate files yet, then I'll drop back to
3673: # insecure (if allowed).
3674:
3675: if($inittype eq "ssl") {
3676: my ($ca, $cert) = lonssl::CertificateFile;
3677: my $kfile = lonssl::KeyFile;
3678: if((!$ca) ||
3679: (!$cert) ||
3680: (!$kfile)) {
3681: $inittype = ""; # This forces insecure attempt.
3682: &logthis("<font color=\"blue\"> Certificates not "
3683: ."installed -- trying insecure auth</font>");
3684: }
3685: else { # SSL certificates are in place so
3686: } # Leave the inittype alone.
3687: }
3688:
3689: if($inittype eq "local") {
3690: my $key = LocalConnection($client, $remotereq);
3691: if($key) {
3692: Debug("Got local key $key");
3693: $clientok = 1;
3694: my $cipherkey = pack("H32", $key);
3695: $cipher = new IDEA($cipherkey);
3696: print $client "ok:local\n";
3697: &logthis('<font color="green"'
3698: . "Successful local authentication </font>");
3699: $keymode = "local"
3700: } else {
3701: Debug("Failed to get local key");
3702: $clientok = 0;
3703: shutdown($client, 3);
3704: close $client;
3705: }
3706: } elsif ($inittype eq "ssl") {
3707: my $key = SSLConnection($client);
3708: if ($key) {
3709: $clientok = 1;
3710: my $cipherkey = pack("H32", $key);
3711: $cipher = new IDEA($cipherkey);
3712: &logthis('<font color="green">'
3713: ."Successfull ssl authentication with $clientname </font>");
3714: $keymode = "ssl";
3715:
3716: } else {
3717: $clientok = 0;
3718: close $client;
3719: }
3720:
3721: } else {
3722: my $ok = InsecureConnection($client);
3723: if($ok) {
3724: $clientok = 1;
3725: &logthis('<font color="green">'
3726: ."Successful insecure authentication with $clientname </font>");
3727: print $client "ok\n";
3728: $keymode = "insecure";
3729: } else {
3730: &logthis('<font color="yellow">'
3731: ."Attempted insecure connection disallowed </font>");
3732: close $client;
3733: $clientok = 0;
3734:
3735: }
3736: }
3737: } else {
3738: &logthis(
3739: "<font color='blue'>WARNING: "
3740: ."$clientip failed to initialize: >$remotereq< </font>");
3741: &status('No init '.$clientip);
3742: }
3743:
3744: } else {
3745: &logthis(
3746: "<font color='blue'>WARNING: Unknown client $clientip</font>");
3747: &status('Hung up on '.$clientip);
3748: }
3749:
3750: if ($clientok) {
3751: # ---------------- New known client connecting, could mean machine online again
3752:
3753: foreach my $id (keys(%hostip)) {
3754: if ($hostip{$id} ne $clientip ||
3755: $hostip{$currenthostid} eq $clientip) {
3756: # no need to try to do recon's to myself
3757: next;
3758: }
3759: &reconlonc("$perlvar{'lonSockDir'}/$id");
3760: }
3761: &logthis("<font color='green'>Established connection: $clientname</font>");
3762: &status('Will listen to '.$clientname);
3763: # ------------------------------------------------------------ Process requests
3764: my $keep_going = 1;
3765: my $user_input;
3766: while(($user_input = get_request) && $keep_going) {
3767: alarm(120);
3768: Debug("Main: Got $user_input\n");
3769: $keep_going = &process_request($user_input);
3770: alarm(0);
3771: &status('Listening to '.$clientname." ($keymode)");
3772: }
3773:
3774: # --------------------------------------------- client unknown or fishy, refuse
3775: } else {
3776: print $client "refused\n";
3777: $client->close();
3778: &logthis("<font color='blue'>WARNING: "
3779: ."Rejected client $clientip, closing connection</font>");
3780: }
3781: }
3782:
3783: # =============================================================================
3784:
3785: &logthis("<font color='red'>CRITICAL: "
3786: ."Disconnect from $clientip ($clientname)</font>");
3787:
3788:
3789: # this exit is VERY important, otherwise the child will become
3790: # a producer of more and more children, forking yourself into
3791: # process death.
3792: exit;
3793:
3794: }
3795:
3796:
3797: #
3798: # Checks to see if the input roleput request was to set
3799: # an author role. If so, invokes the lchtmldir script to set
3800: # up a correct public_html
3801: # Parameters:
3802: # request - The request sent to the rolesput subchunk.
3803: # We're looking for /domain/_au
3804: # domain - The domain in which the user is having roles doctored.
3805: # user - Name of the user for which the role is being put.
3806: # authtype - The authentication type associated with the user.
3807: #
3808: sub ManagePermissions
3809: {
3810:
3811: my ($request, $domain, $user, $authtype) = @_;
3812:
3813: # See if the request is of the form /$domain/_au
3814: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3815: my $execdir = $perlvar{'lonDaemons'};
3816: my $userhome= "/home/$user" ;
3817: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
3818: system("$execdir/lchtmldir $userhome $user $authtype");
3819: }
3820: }
3821: #
3822: # GetAuthType - Determines the authorization type of a user in a domain.
3823:
3824: # Returns the authorization type or nouser if there is no such user.
3825: #
3826: sub GetAuthType
3827: {
3828:
3829: my ($domain, $user) = @_;
3830:
3831: Debug("GetAuthType( $domain, $user ) \n");
3832: my $proname = &propath($domain, $user);
3833: my $passwdfile = "$proname/passwd";
3834: if( -e $passwdfile ) {
3835: my $pf = IO::File->new($passwdfile);
3836: my $realpassword = <$pf>;
3837: chomp($realpassword);
3838: Debug("Password info = $realpassword\n");
3839: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3840: Debug("Authtype = $authtype, content = $contentpwd\n");
3841: my $availinfo = '';
3842: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3843: $availinfo = $contentpwd;
3844: }
3845:
3846: return "$authtype:$availinfo";
3847: }
3848: else {
3849: Debug("Returning nouser");
3850: return "nouser";
3851: }
3852: }
3853:
3854: #
3855: # Validate a user given their domain, name and password. This utility
3856: # function is used by both AuthenticateHandler and ChangePasswordHandler
3857: # to validate the login credentials of a user.
3858: # Parameters:
3859: # $domain - The domain being logged into (this is required due to
3860: # the capability for multihomed systems.
3861: # $user - The name of the user being validated.
3862: # $password - The user's propoposed password.
3863: #
3864: # Returns:
3865: # 1 - The domain,user,pasword triplet corresponds to a valid
3866: # user.
3867: # 0 - The domain,user,password triplet is not a valid user.
3868: #
3869: sub validate_user {
3870: my ($domain, $user, $password) = @_;
3871:
3872:
3873: # Why negative ~pi you may well ask? Well this function is about
3874: # authentication, and therefore very important to get right.
3875: # I've initialized the flag that determines whether or not I've
3876: # validated correctly to a value it's not supposed to get.
3877: # At the end of this function. I'll ensure that it's not still that
3878: # value so we don't just wind up returning some accidental value
3879: # as a result of executing an unforseen code path that
3880: # did not set $validated.
3881:
3882: my $validated = -3.14159;
3883:
3884: # How we authenticate is determined by the type of authentication
3885: # the user has been assigned. If the authentication type is
3886: # "nouser", the user does not exist so we will return 0.
3887:
3888: my $contents = &GetAuthType($domain, $user);
3889: my ($howpwd, $contentpwd) = split(/:/, $contents);
3890:
3891: my $null = pack("C",0); # Used by kerberos auth types.
3892:
3893: if ($howpwd ne 'nouser') {
3894:
3895: if($howpwd eq "internal") { # Encrypted is in local password file.
3896: $validated = (crypt($password, $contentpwd) eq $contentpwd);
3897: }
3898: elsif ($howpwd eq "unix") { # User is a normal unix user.
3899: $contentpwd = (getpwnam($user))[1];
3900: if($contentpwd) {
3901: if($contentpwd eq 'x') { # Shadow password file...
3902: my $pwauth_path = "/usr/local/sbin/pwauth";
3903: open PWAUTH, "|$pwauth_path" or
3904: die "Cannot invoke authentication";
3905: print PWAUTH "$user\n$password\n";
3906: close PWAUTH;
3907: $validated = ! $?;
3908:
3909: } else { # Passwords in /etc/passwd.
3910: $validated = (crypt($password,
3911: $contentpwd) eq $contentpwd);
3912: }
3913: } else {
3914: $validated = 0;
3915: }
3916: }
3917: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
3918: if(! ($password =~ /$null/) ) {
3919: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
3920: "",
3921: $contentpwd,,
3922: 'krbtgt',
3923: $contentpwd,
3924: 1,
3925: $password);
3926: if(!$k4error) {
3927: $validated = 1;
3928: }
3929: else {
3930: $validated = 0;
3931: &logthis('krb4: '.$user.', '.$contentpwd.', '.
3932: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
3933: }
3934: }
3935: else {
3936: $validated = 0; # Password has a match with null.
3937: }
3938: }
3939: elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
3940: if(!($password =~ /$null/)) { # Null password not allowed.
3941: my $krbclient = &Authen::Krb5::parse_name($user.'@'
3942: .$contentpwd);
3943: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
3944: my $krbserver = &Authen::Krb5::parse_name($krbservice);
3945: my $credentials= &Authen::Krb5::cc_default();
3946: $credentials->initialize($krbclient);
3947: my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,
3948: $krbserver,
3949: $password,
3950: $credentials);
3951: $validated = ($krbreturn == 1);
3952: }
3953: else {
3954: $validated = 0;
3955: }
3956: }
3957: elsif ($howpwd eq "localauth") {
3958: # Authenticate via installation specific authentcation method:
3959: $validated = &localauth::localauth($user,
3960: $password,
3961: $contentpwd);
3962: }
3963: else { # Unrecognized auth is also bad.
3964: $validated = 0;
3965: }
3966: } else {
3967: $validated = 0;
3968: }
3969: #
3970: # $validated has the correct stat of the authentication:
3971: #
3972:
3973: unless ($validated != -3.14159) {
3974: die "ValidateUser - failed to set the value of validated";
3975: }
3976: return $validated;
3977: }
3978:
3979:
3980: sub addline {
3981: my ($fname,$hostid,$ip,$newline)=@_;
3982: my $contents;
3983: my $found=0;
3984: my $expr='^'.$hostid.':'.$ip.':';
3985: $expr =~ s/\./\\\./g;
3986: my $sh;
3987: if ($sh=IO::File->new("$fname.subscription")) {
3988: while (my $subline=<$sh>) {
3989: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3990: }
3991: $sh->close();
3992: }
3993: $sh=IO::File->new(">$fname.subscription");
3994: if ($contents) { print $sh $contents; }
3995: if ($newline) { print $sh $newline; }
3996: $sh->close();
3997: return $found;
3998: }
3999:
4000: sub getchat {
4001: my ($cdom,$cname,$udom,$uname)=@_;
4002: my %hash;
4003: my $proname=&propath($cdom,$cname);
4004: my @entries=();
4005: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4006: &GDBM_READER(),0640)) {
4007: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4008: untie %hash;
4009: }
4010: my @participants=();
4011: my $cutoff=time-60;
4012: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
4013: &GDBM_WRCREAT(),0640)) {
4014: $hash{$uname.':'.$udom}=time;
4015: foreach (sort keys %hash) {
4016: if ($hash{$_}>$cutoff) {
4017: $participants[$#participants+1]='active_participant:'.$_;
4018: }
4019: }
4020: untie %hash;
4021: }
4022: return (@participants,@entries);
4023: }
4024:
4025: sub chatadd {
4026: my ($cdom,$cname,$newchat)=@_;
4027: my %hash;
4028: my $proname=&propath($cdom,$cname);
4029: my @entries=();
4030: my $time=time;
4031: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4032: &GDBM_WRCREAT(),0640)) {
4033: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4034: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
4035: my ($thentime,$idnum)=split(/\_/,$lastid);
4036: my $newid=$time.'_000000';
4037: if ($thentime==$time) {
4038: $idnum=~s/^0+//;
4039: $idnum++;
4040: $idnum=substr('000000'.$idnum,-6,6);
4041: $newid=$time.'_'.$idnum;
4042: }
4043: $hash{$newid}=$newchat;
4044: my $expired=$time-3600;
4045: foreach (keys %hash) {
4046: my ($thistime)=($_=~/(\d+)\_/);
4047: if ($thistime<$expired) {
4048: delete $hash{$_};
4049: }
4050: }
4051: untie %hash;
4052: }
4053: {
4054: my $hfh;
4055: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
4056: print $hfh "$time:".&unescape($newchat)."\n";
4057: }
4058: }
4059: }
4060:
4061: sub unsub {
4062: my ($fname,$clientip)=@_;
4063: my $result;
4064: my $unsubs = 0; # Number of successful unsubscribes:
4065:
4066:
4067: # An old way subscriptions were handled was to have a
4068: # subscription marker file:
4069:
4070: Debug("Attempting unlink of $fname.$clientname");
4071: if (unlink("$fname.$clientname")) {
4072: $unsubs++; # Successful unsub via marker file.
4073: }
4074:
4075: # The more modern way to do it is to have a subscription list
4076: # file:
4077:
4078: if (-e "$fname.subscription") {
4079: my $found=&addline($fname,$clientname,$clientip,'');
4080: if ($found) {
4081: $unsubs++;
4082: }
4083: }
4084:
4085: # If either or both of these mechanisms succeeded in unsubscribing a
4086: # resource we can return ok:
4087:
4088: if($unsubs) {
4089: $result = "ok\n";
4090: } else {
4091: $result = "not_subscribed\n";
4092: }
4093:
4094: return $result;
4095: }
4096:
4097: sub currentversion {
4098: my $fname=shift;
4099: my $version=-1;
4100: my $ulsdir='';
4101: if ($fname=~/^(.+)\/[^\/]+$/) {
4102: $ulsdir=$1;
4103: }
4104: my ($fnamere1,$fnamere2);
4105: # remove version if already specified
4106: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
4107: # get the bits that go before and after the version number
4108: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4109: $fnamere1=$1;
4110: $fnamere2='.'.$2;
4111: }
4112: if (-e $fname) { $version=1; }
4113: if (-e $ulsdir) {
4114: if(-d $ulsdir) {
4115: if (opendir(LSDIR,$ulsdir)) {
4116: my $ulsfn;
4117: while ($ulsfn=readdir(LSDIR)) {
4118: # see if this is a regular file (ignore links produced earlier)
4119: my $thisfile=$ulsdir.'/'.$ulsfn;
4120: unless (-l $thisfile) {
4121: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
4122: if ($1>$version) { $version=$1; }
4123: }
4124: }
4125: }
4126: closedir(LSDIR);
4127: $version++;
4128: }
4129: }
4130: }
4131: return $version;
4132: }
4133:
4134: sub thisversion {
4135: my $fname=shift;
4136: my $version=-1;
4137: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4138: $version=$1;
4139: }
4140: return $version;
4141: }
4142:
4143: sub subscribe {
4144: my ($userinput,$clientip)=@_;
4145: my $result;
4146: my ($cmd,$fname)=split(/:/,$userinput);
4147: my $ownership=&ishome($fname);
4148: if ($ownership eq 'owner') {
4149: # explitly asking for the current version?
4150: unless (-e $fname) {
4151: my $currentversion=¤tversion($fname);
4152: if (&thisversion($fname)==$currentversion) {
4153: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4154: my $root=$1;
4155: my $extension=$2;
4156: symlink($root.'.'.$extension,
4157: $root.'.'.$currentversion.'.'.$extension);
4158: unless ($extension=~/\.meta$/) {
4159: symlink($root.'.'.$extension.'.meta',
4160: $root.'.'.$currentversion.'.'.$extension.'.meta');
4161: }
4162: }
4163: }
4164: }
4165: if (-e $fname) {
4166: if (-d $fname) {
4167: $result="directory\n";
4168: } else {
4169: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
4170: my $now=time;
4171: my $found=&addline($fname,$clientname,$clientip,
4172: "$clientname:$clientip:$now\n");
4173: if ($found) { $result="$fname\n"; }
4174: # if they were subscribed to only meta data, delete that
4175: # subscription, when you subscribe to a file you also get
4176: # the metadata
4177: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4178: $fname=~s/\/home\/httpd\/html\/res/raw/;
4179: $fname="http://$thisserver/".$fname;
4180: $result="$fname\n";
4181: }
4182: } else {
4183: $result="not_found\n";
4184: }
4185: } else {
4186: $result="rejected\n";
4187: }
4188: return $result;
4189: }
4190:
4191: sub make_passwd_file {
4192: my ($uname, $umode,$npass,$passfilename)=@_;
4193: my $result="ok\n";
4194: if ($umode eq 'krb4' or $umode eq 'krb5') {
4195: {
4196: my $pf = IO::File->new(">$passfilename");
4197: print $pf "$umode:$npass\n";
4198: }
4199: } elsif ($umode eq 'internal') {
4200: my $salt=time;
4201: $salt=substr($salt,6,2);
4202: my $ncpass=crypt($npass,$salt);
4203: {
4204: &Debug("Creating internal auth");
4205: my $pf = IO::File->new(">$passfilename");
4206: print $pf "internal:$ncpass\n";
4207: }
4208: } elsif ($umode eq 'localauth') {
4209: {
4210: my $pf = IO::File->new(">$passfilename");
4211: print $pf "localauth:$npass\n";
4212: }
4213: } elsif ($umode eq 'unix') {
4214: {
4215: #
4216: # Don't allow the creation of privileged accounts!!! that would
4217: # be real bad!!!
4218: #
4219: my $uid = getpwnam($uname);
4220: if((defined $uid) && ($uid == 0)) {
4221: &logthis(">>>Attempted to create privilged account blocked");
4222: return "no_priv_account_error\n";
4223: }
4224:
4225: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4226: {
4227: &Debug("Executing external: ".$execpath);
4228: &Debug("user = ".$uname.", Password =". $npass);
4229: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
4230: print $se "$uname\n";
4231: print $se "$npass\n";
4232: print $se "$npass\n";
4233: }
4234: my $useraddok = $?;
4235: if($useraddok > 0) {
4236: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
4237: }
4238: my $pf = IO::File->new(">$passfilename");
4239: print $pf "unix:\n";
4240: }
4241: } elsif ($umode eq 'none') {
4242: {
4243: my $pf = IO::File->new(">$passfilename");
4244: print $pf "none:\n";
4245: }
4246: } else {
4247: $result="auth_mode_error\n";
4248: }
4249: return $result;
4250: }
4251:
4252: sub sethost {
4253: my ($remotereq) = @_;
4254: my (undef,$hostid)=split(/:/,$remotereq);
4255: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4256: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
4257: $currenthostid =$hostid;
4258: $currentdomainid=$hostdom{$hostid};
4259: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4260: } else {
4261: &logthis("Requested host id $hostid not an alias of ".
4262: $perlvar{'lonHostID'}." refusing connection");
4263: return 'unable_to_set';
4264: }
4265: return 'ok';
4266: }
4267:
4268: sub version {
4269: my ($userinput)=@_;
4270: $remoteVERSION=(split(/:/,$userinput))[1];
4271: return "version:$VERSION";
4272: }
4273:
4274: #There is a copy of this in lonnet.pm
4275: sub userload {
4276: my $numusers=0;
4277: {
4278: opendir(LONIDS,$perlvar{'lonIDsDir'});
4279: my $filename;
4280: my $curtime=time;
4281: while ($filename=readdir(LONIDS)) {
4282: if ($filename eq '.' || $filename eq '..') {next;}
4283: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
4284: if ($curtime-$mtime < 1800) { $numusers++; }
4285: }
4286: closedir(LONIDS);
4287: }
4288: my $userloadpercent=0;
4289: my $maxuserload=$perlvar{'lonUserLoadLim'};
4290: if ($maxuserload) {
4291: $userloadpercent=100*$numusers/$maxuserload;
4292: }
4293: $userloadpercent=sprintf("%.2f",$userloadpercent);
4294: return $userloadpercent;
4295: }
4296:
4297: # Routines for serializing arrays and hashes (copies from lonnet)
4298:
4299: sub array2str {
4300: my (@array) = @_;
4301: my $result=&arrayref2str(\@array);
4302: $result=~s/^__ARRAY_REF__//;
4303: $result=~s/__END_ARRAY_REF__$//;
4304: return $result;
4305: }
4306:
4307: sub arrayref2str {
4308: my ($arrayref) = @_;
4309: my $result='__ARRAY_REF__';
4310: foreach my $elem (@$arrayref) {
4311: if(ref($elem) eq 'ARRAY') {
4312: $result.=&arrayref2str($elem).'&';
4313: } elsif(ref($elem) eq 'HASH') {
4314: $result.=&hashref2str($elem).'&';
4315: } elsif(ref($elem)) {
4316: #print("Got a ref of ".(ref($elem))." skipping.");
4317: } else {
4318: $result.=&escape($elem).'&';
4319: }
4320: }
4321: $result=~s/\&$//;
4322: $result .= '__END_ARRAY_REF__';
4323: return $result;
4324: }
4325:
4326: sub hash2str {
4327: my (%hash) = @_;
4328: my $result=&hashref2str(\%hash);
4329: $result=~s/^__HASH_REF__//;
4330: $result=~s/__END_HASH_REF__$//;
4331: return $result;
4332: }
4333:
4334: sub hashref2str {
4335: my ($hashref)=@_;
4336: my $result='__HASH_REF__';
4337: foreach (sort(keys(%$hashref))) {
4338: if (ref($_) eq 'ARRAY') {
4339: $result.=&arrayref2str($_).'=';
4340: } elsif (ref($_) eq 'HASH') {
4341: $result.=&hashref2str($_).'=';
4342: } elsif (ref($_)) {
4343: $result.='=';
4344: #print("Got a ref of ".(ref($_))." skipping.");
4345: } else {
4346: if ($_) {$result.=&escape($_).'=';} else { last; }
4347: }
4348:
4349: if(ref($hashref->{$_}) eq 'ARRAY') {
4350: $result.=&arrayref2str($hashref->{$_}).'&';
4351: } elsif(ref($hashref->{$_}) eq 'HASH') {
4352: $result.=&hashref2str($hashref->{$_}).'&';
4353: } elsif(ref($hashref->{$_})) {
4354: $result.='&';
4355: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
4356: } else {
4357: $result.=&escape($hashref->{$_}).'&';
4358: }
4359: }
4360: $result=~s/\&$//;
4361: $result .= '__END_HASH_REF__';
4362: return $result;
4363: }
4364:
4365: # ----------------------------------- POD (plain old documentation, CPAN style)
4366:
4367: =head1 NAME
4368:
4369: lond - "LON Daemon" Server (port "LOND" 5663)
4370:
4371: =head1 SYNOPSIS
4372:
4373: Usage: B<lond>
4374:
4375: Should only be run as user=www. This is a command-line script which
4376: is invoked by B<loncron>. There is no expectation that a typical user
4377: will manually start B<lond> from the command-line. (In other words,
4378: DO NOT START B<lond> YOURSELF.)
4379:
4380: =head1 DESCRIPTION
4381:
4382: There are two characteristics associated with the running of B<lond>,
4383: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4384: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4385: subscriptions, etc). These are described in two large
4386: sections below.
4387:
4388: B<PROCESS MANAGEMENT>
4389:
4390: Preforker - server who forks first. Runs as a daemon. HUPs.
4391: Uses IDEA encryption
4392:
4393: B<lond> forks off children processes that correspond to the other servers
4394: in the network. Management of these processes can be done at the
4395: parent process level or the child process level.
4396:
4397: B<logs/lond.log> is the location of log messages.
4398:
4399: The process management is now explained in terms of linux shell commands,
4400: subroutines internal to this code, and signal assignments:
4401:
4402: =over 4
4403:
4404: =item *
4405:
4406: PID is stored in B<logs/lond.pid>
4407:
4408: This is the process id number of the parent B<lond> process.
4409:
4410: =item *
4411:
4412: SIGTERM and SIGINT
4413:
4414: Parent signal assignment:
4415: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4416:
4417: Child signal assignment:
4418: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4419: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4420: to restart a new child.)
4421:
4422: Command-line invocations:
4423: B<kill> B<-s> SIGTERM I<PID>
4424: B<kill> B<-s> SIGINT I<PID>
4425:
4426: Subroutine B<HUNTSMAN>:
4427: This is only invoked for the B<lond> parent I<PID>.
4428: This kills all the children, and then the parent.
4429: The B<lonc.pid> file is cleared.
4430:
4431: =item *
4432:
4433: SIGHUP
4434:
4435: Current bug:
4436: This signal can only be processed the first time
4437: on the parent process. Subsequent SIGHUP signals
4438: have no effect.
4439:
4440: Parent signal assignment:
4441: $SIG{HUP} = \&HUPSMAN;
4442:
4443: Child signal assignment:
4444: none (nothing happens)
4445:
4446: Command-line invocations:
4447: B<kill> B<-s> SIGHUP I<PID>
4448:
4449: Subroutine B<HUPSMAN>:
4450: This is only invoked for the B<lond> parent I<PID>,
4451: This kills all the children, and then the parent.
4452: The B<lond.pid> file is cleared.
4453:
4454: =item *
4455:
4456: SIGUSR1
4457:
4458: Parent signal assignment:
4459: $SIG{USR1} = \&USRMAN;
4460:
4461: Child signal assignment:
4462: $SIG{USR1}= \&logstatus;
4463:
4464: Command-line invocations:
4465: B<kill> B<-s> SIGUSR1 I<PID>
4466:
4467: Subroutine B<USRMAN>:
4468: When invoked for the B<lond> parent I<PID>,
4469: SIGUSR1 is sent to all the children, and the status of
4470: each connection is logged.
4471:
4472: =item *
4473:
4474: SIGUSR2
4475:
4476: Parent Signal assignment:
4477: $SIG{USR2} = \&UpdateHosts
4478:
4479: Child signal assignment:
4480: NONE
4481:
4482:
4483: =item *
4484:
4485: SIGCHLD
4486:
4487: Parent signal assignment:
4488: $SIG{CHLD} = \&REAPER;
4489:
4490: Child signal assignment:
4491: none
4492:
4493: Command-line invocations:
4494: B<kill> B<-s> SIGCHLD I<PID>
4495:
4496: Subroutine B<REAPER>:
4497: This is only invoked for the B<lond> parent I<PID>.
4498: Information pertaining to the child is removed.
4499: The socket port is cleaned up.
4500:
4501: =back
4502:
4503: B<SERVER-SIDE ACTIVITIES>
4504:
4505: Server-side information can be accepted in an encrypted or non-encrypted
4506: method.
4507:
4508: =over 4
4509:
4510: =item ping
4511:
4512: Query a client in the hosts.tab table; "Are you there?"
4513:
4514: =item pong
4515:
4516: Respond to a ping query.
4517:
4518: =item ekey
4519:
4520: Read in encrypted key, make cipher. Respond with a buildkey.
4521:
4522: =item load
4523:
4524: Respond with CPU load based on a computation upon /proc/loadavg.
4525:
4526: =item currentauth
4527:
4528: Reply with current authentication information (only over an
4529: encrypted channel).
4530:
4531: =item auth
4532:
4533: Only over an encrypted channel, reply as to whether a user's
4534: authentication information can be validated.
4535:
4536: =item passwd
4537:
4538: Allow for a password to be set.
4539:
4540: =item makeuser
4541:
4542: Make a user.
4543:
4544: =item passwd
4545:
4546: Allow for authentication mechanism and password to be changed.
4547:
4548: =item home
4549:
4550: Respond to a question "are you the home for a given user?"
4551:
4552: =item update
4553:
4554: Update contents of a subscribed resource.
4555:
4556: =item unsubscribe
4557:
4558: The server is unsubscribing from a resource.
4559:
4560: =item subscribe
4561:
4562: The server is subscribing to a resource.
4563:
4564: =item log
4565:
4566: Place in B<logs/lond.log>
4567:
4568: =item put
4569:
4570: stores hash in namespace
4571:
4572: =item rolesput
4573:
4574: put a role into a user's environment
4575:
4576: =item get
4577:
4578: returns hash with keys from array
4579: reference filled in from namespace
4580:
4581: =item eget
4582:
4583: returns hash with keys from array
4584: reference filled in from namesp (encrypts the return communication)
4585:
4586: =item rolesget
4587:
4588: get a role from a user's environment
4589:
4590: =item del
4591:
4592: deletes keys out of array from namespace
4593:
4594: =item keys
4595:
4596: returns namespace keys
4597:
4598: =item dump
4599:
4600: dumps the complete (or key matching regexp) namespace into a hash
4601:
4602: =item store
4603:
4604: stores hash permanently
4605: for this url; hashref needs to be given and should be a \%hashname; the
4606: remaining args aren't required and if they aren't passed or are '' they will
4607: be derived from the ENV
4608:
4609: =item restore
4610:
4611: returns a hash for a given url
4612:
4613: =item querysend
4614:
4615: Tells client about the lonsql process that has been launched in response
4616: to a sent query.
4617:
4618: =item queryreply
4619:
4620: Accept information from lonsql and make appropriate storage in temporary
4621: file space.
4622:
4623: =item idput
4624:
4625: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4626: for each student, defined perhaps by the institutional Registrar.)
4627:
4628: =item idget
4629:
4630: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4631: for each student, defined perhaps by the institutional Registrar.)
4632:
4633: =item tmpput
4634:
4635: Accept and store information in temporary space.
4636:
4637: =item tmpget
4638:
4639: Send along temporarily stored information.
4640:
4641: =item ls
4642:
4643: List part of a user's directory.
4644:
4645: =item pushtable
4646:
4647: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4648: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4649: must be restored manually in case of a problem with the new table file.
4650: pushtable requires that the request be encrypted and validated via
4651: ValidateManager. The form of the command is:
4652: enc:pushtable tablename <tablecontents> \n
4653: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4654: cleartext newline.
4655:
4656: =item Hanging up (exit or init)
4657:
4658: What to do when a client tells the server that they (the client)
4659: are leaving the network.
4660:
4661: =item unknown command
4662:
4663: If B<lond> is sent an unknown command (not in the list above),
4664: it replys to the client "unknown_cmd".
4665:
4666:
4667: =item UNKNOWN CLIENT
4668:
4669: If the anti-spoofing algorithm cannot verify the client,
4670: the client is rejected (with a "refused" message sent
4671: to the client, and the connection is closed.
4672:
4673: =back
4674:
4675: =head1 PREREQUISITES
4676:
4677: IO::Socket
4678: IO::File
4679: Apache::File
4680: Symbol
4681: POSIX
4682: Crypt::IDEA
4683: LWP::UserAgent()
4684: GDBM_File
4685: Authen::Krb4
4686: Authen::Krb5
4687:
4688: =head1 COREQUISITES
4689:
4690: =head1 OSNAMES
4691:
4692: linux
4693:
4694: =head1 SCRIPT CATEGORIES
4695:
4696: Server/Process
4697:
4698: =cut
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